chengcg – Page 222 – CNC Machining & Turning, Milling, Metal parts

CNC Machining for deep processing parts

Our workshop is machining services for CNC Machining parts, metal stamping parts, turning parts, cnc parts, Springs,coldforming parts, machining parts, screw machine parts, casting parts, forging parts supplier, Wecan produce machined parts according to your requirements.

machining parts: Hydraulic, valve, flange, automobile, shaft, bearing housing Bar, plate,welded part, marine part, winch part, sheet metal Equipment: Common lathe,CNC Machine,Milling,Turning,Stamping Machine,Spring Machine

Metal Process: CNC turning, milling, drilling, planning, grinding, welding. Surface Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint,anodize, powder coating, brush, Polish Technical: Dedicated mechanical designer, experienced worker 3D design service inclusive of modeling, analysis and detailed drawing at normal cost

Quality: ISO 9001: 2008
Control strictly and follow specification
Move fast to meet your urgent need caused by accident.
Packing: Wooden case, hardboard, steel pallet, according to custom’s requirements

If you want to know more about cnc machining parts in China, Please contact us.

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The application of numerical control and CNC machine tools successfully solved the automation of some medium and small batch parts with complex shape and high consistency. This not only greatly improved the production efficiency and machining accuracy, but also reduced the labor intensity of the workers, and shortened the production preparation period. However, in the use of CNC lathes, CNC lathes will inevitably have various failures, so the maintenance of the fault has become the most critical problem for the users of CNC lathes. On the one hand, the after-sales service of sales companies can not be guaranteed in time. On the other hand, some maintenance techniques can quickly judge the fault location, shorten the maintenance time and make the equipment run as fast as possible. In daily failures, we often encounter such failures as tool carrier, spindle, thread processing, system display, drive and communication. And the fault of the tool holder occupies a large proportion. Here, the classification introduces various kinds of fault of the electric tool holder and the corresponding solution in the daily work, and hope to provide some useful reference for you. The numerical control system used is GSK series lathe numerical control system produced by Guangzhou CNC Equipment Co., Ltd.

Fault phenomenon 1: the electric tool holder lock is not tight
Fault cause processing method
The position of the letter plate is not correct: disassemble the top of the tool holder, whirl and adjust the position of the letter plate, so that the Holzer element of the tool holder is aligned with the magnetic steel to stop the position of the knife in the exact position.
2. The system lock time is not long enough: adjust the system’s lock time parameter (the new turret lock time t = 1.2s).
Failure of mechanical locking mechanism: dismantle the tool carrier, adjust the machinery, and check whether the locating pin is broken.

Fault phenomenon two: electric knife holder, a certain knife number can not stop, the rest of the cutter can rotate.
Fault cause processing method
The Holzer element damage of this knife: confirm which tool position makes the tool holder turn, input the instruction to turn the knife position on the system, and use the multimeter to measure whether there is a voltage change on the +24V contact points by the multimeter. If no change is made, it can be judged to be the damage of the Holzer element of the knife, and the replacement of the plate or the Holzer element.
2. The signal line of the cutter position is broken, causing the system to be unable to detect the in place signal: check whether the cutter position signal is connected with the system, whether there is a circuit breaker, and connect correctly.
3. There are problems in the system of signal receiving circuit of the knife position: when it is sure that the Holzer element is no problem, and the connection between the knife position signal and the system is no problem, the main board is replaced.

CNC Machining for Fishing line wheel

Our workshop is machining services for CNC Machining parts, metal stamping parts, turning parts, cnc parts, Springs,coldforming parts, machining parts, screw machine parts, casting parts, forging parts supplier, Wecan produce machined parts according to your requirements.

machining parts: Hydraulic, valve, flange, automobile, shaft, bearing housing Bar, plate,welded part, marine part, winch part, sheet metal Equipment: Common lathe,CNC Machine,Milling,Turning,Stamping Machine,Spring Machine

Metal Process: CNC turning, milling, drilling, planning, grinding, welding. Surface Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint,anodize, powder coating, brush, Polish Technical: Dedicated mechanical designer, experienced worker 3D design service inclusive of modeling, analysis and detailed drawing at normal cost

Quality: ISO 9001: 2008
Control strictly and follow specification
Move fast to meet your urgent need caused by accident.
Packing: Wooden case, hardboard, steel pallet, according to custom’s requirements

If you want to know more about cnc machining parts in China, Please contact us.

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1 the transformation of the new machine and the lathe for overhaul of the old machine must undergo the same transformation as follows.
(1) change the X shaft, Z shaft wire rod, bearing and motor.
(2) increase the electric tool holder and the spindle encoder.
(3) increasing the driving device of the axial motor, limiting the stroke switch running over the overrange, adding the frequency converter (customer needs), and the electrical parts required for processing and safety.
(4) the scraper on both ends of the supporting shaft of the X axis and Z axis, the scraper of the ball screw bracket and the saddle, and the bed body are matched with the saddle guide pair of the saddle.
(5) as required, additional protective facilities, such as the protective cover of the wire rod, the safety door, and the protective device for the trip switch, should be added.
2 the difference between the new machine transformation and the old machine overhaul lathe transformation.
(1) the main shaft and tailstock part of the new machine has not been changed, and the spindle part and tailstock part need not be reformed.
(2) the old machine large repair lathe because of long time use, guide rail has been worn, in order to ensure the long repair, can continue to use for a long time without deformation, must pass through the quenching process, and grinding guide, and grinding guide rail must ensure that the guide rail hardness more than HRC47.
(3) the old machine overhaul lathe should be reconstructed and adjusted according to the needs of customers.
3 the accuracy test of new machine transformation and overhaul machine tool transformation is an important item of inspection.
The accuracy is verified by the implementation of JB/T8324.1-1996 “precision CNC lathe horizontal lathe”.
4 the quality control of the renovation of the new lathe is as follows
(1) scraping test. The new lathe modification is used to match and scrape the supporting surfaces of the two ends of the X and Z shafts, and to match and scrape the ball screw pair bracket and the bed saddle, and to match the bed and the guide rail of the saddle. The spindle and tail part of the lathe have not been removed. The test methods are as follows: using the matching surface for color painting, combining with each other, and relative friction, then testing the scraping point number of the scraping surface, and checking the bonding degree with the tape measure, in which the scraping and grinding point should not be less than 6 /25*25mm, 0.03mm’s plug junction.
(2) parallelism test of lead screw and guide rail: when the screw bar is assembled, the parallelism between the screw bar and the guide rail must be less than 0.02mm.
(3) the straightness of the guide rail in the vertical plane of the accuracy test G1 (only convex) should be guaranteed by the lathe manufacturer, not as a key inspection item.
(4) the accuracy of G4, G5 and G6 in the accuracy test should also be ensured by ordinary lathe manufacturers, not as key inspection items.
(5) the top two equal height of G11 bed head and tailstock is guaranteed by ordinary lathe manufacturers, not as a key project for quality control of manufacturers.
Accuracy test of 5 user overhaul lathes
As the grinding guide is carried out, the reference surface has been changed, so all the items in the precision inspection must be checked and the control should be strictly controlled to ensure the performance after the transformation.
6 other important quality control points for overhaul lathe transformation and new machine transformation.
(1) rust check: all horizontal and longitudinal guide surfaces, spindle, spindle flange, and tailstock hollow sleeve.
(2) the surface of non paint must be taken as antirust measures, such as cleaning, using grease and so on for antirust inspection: the scraping surface, wire rod and bearing must be cleaned before the assembly is carried out, and no red powder, iron and other dirty substances should be retained; there is no dust or dirt on the inside of the electric box and the inside of the protective cover.
(3) leakage inspection: the spindle bearing and gear of the renovation lathe must be lubricated. The axial screw and bearing must be lubricated in the renovation of the lathe and the new lathe, and the cooling device must be made.
(4) machine noise, temperature rise, rotation speed and air lift test:
The main shaft is continuously transported to 4min at various speeds, and the highest speed is not less than 2 hours. The empty running time of the whole machine is more than 16h, and the simulation tests of circular turning, thread, outer circle and end face are carried out.
After the spindle bearing temperature is stable, bearing temperature and temperature rise rolling bearing: temperature less than 70 degrees, temperature rise less than 40 degrees, sliding bearing: temperature less than 60 degrees, temperature rise less than 30 degrees.
3. The noise pressure level of machine tool is less than 83dB (A) under the condition of air transportation, and there is no abnormal scream and impact sound. The feed motion of each axis should be stable without obvious vibration, trembling and crawling.
4. The continuous air lift test of the machine tool has no fault during the continuous air transfer time, and runs reliably and stably.
(5) transformation of the replacement parts of the user (including the maintenance of the parts of the machine tool): there are many transformation items of the replacement parts of the lathe, mainly the replacement of the spindle bearing, the axial wire rod, the axial motor, the axial bearing and the system.
(1) replacing the spindle bearing: since the replacement of the spindle bearing is to ensure the precision of the machining circle and the end face, the noise of the spindle must not exceed 83dB (A) in the case of no abnormal noise when the bearing is replaced. Then the machining precision is tested and the surface roughness of the workpiece is tested.
2. Replace the axial screw inspection: check the accuracy of the position, ensure that the running of the running machine reaches the normal impact noise and noise within the prescribed range. Change the axial motor: because other projects have not been reformed, the inspection of the noise of the running machine only is tested, and the axial operation is without normal sound and noise. Check its axial reverse clearance to prevent the reverse difference in assembly due to assembly.
3. Replace axial bearing: for the replacement of axial bearing, we must ensure that the axial reverse difference reaches the requirement and check the abnormal noise.
4. Change the system test: replace the system, only check the system work.

CNC Machining for Spinning Reel

Our workshop is machining services for CNC Machining parts, metal stamping parts, turning parts, cnc parts, Springs,coldforming parts, machining parts, screw machine parts, casting parts, forging parts supplier, Wecan produce machined parts according to your requirements.

machining parts: Hydraulic, valve, flange, automobile, shaft, bearing housing Bar, plate,welded part, marine part, winch part, sheet metal Equipment: Common lathe,CNC Machine,Milling,Turning,Stamping Machine,Spring Machine

Metal Process: CNC turning, milling, drilling, planning, grinding, welding. Surface Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint,anodize, powder coating, brush, Polish Technical: Dedicated mechanical designer, experienced worker 3D design service inclusive of modeling, analysis and detailed drawing at normal cost

Quality: ISO 9001: 2008
Control strictly and follow specification
Move fast to meet your urgent need caused by accident.
Packing: Wooden case, hardboard, steel pallet, according to custom’s requirements

If you want to know more about cnc machining parts in China, Please contact us.

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Each component in the process system, including the manufacturing error of the machine tool, the tool and the fixture, the installation error, the wear and tear in use, directly affects the machining accuracy of the workpiece. In other words, in the process of processing, the process system will produce a variety of errors, which will change the position of the tool and workpiece in the process of cutting motion and influence the machining accuracy of the parts. These errors are related to the structural state and cutting process of the process system, and the main factors causing machining errors are:
(1) the geometric error of the system

The error of processing principle

The error of the machining principle is due to the error caused by the approximate machining movement or the approximate tool profile. Because of the error in the machining principle, it is called the machining principle error. As long as the principle error is within the allowable range, the machining method is still feasible.

Geometric error of machine tool

The manufacturing error, installation error and wear in the machine tool directly affect the machining accuracy of the workpiece. Among them are the spindle rotation of machine tool, the linear movement of machine tool guide and the error of machine tool drive chain.

Manufacturing error and wear of cutting tools

The manufacturing error, installation error and wear of the tool affect the machining accuracy of the workpiece. During the cutting process, the cutting edge and blade face are strongly rubbed with the workpiece and chip, causing the tool to wear. When the tool wear reaches a certain value, the surface roughness of the workpiece increases, and the chip color and shape change, accompanied by vibration. Tool wear will directly affect cutting productivity, machining quality and cost.

Jig error

The fixture error includes positioning error, clamping error, fixture installation error and tool setting error. These errors are mainly related to the accuracy of fixture manufacturing and assembly. The positioning error of the fixture will be analyzed in detail.

The position of the workpiece in the fixture is determined by the contact between the positioning base and the locating element. However, due to the manufacturing error of the positioning base surface and the working surface of the positioning element, the actual position of each workpiece in the fixture is not consistent. After processing, the size of each workpiece must vary in size, resulting in errors. The machining error caused by the incorrect positioning of the workpiece on the fixture is called the positioning error and is expressed by delta D. It includes reference displacement error and datum non coincidence error. When using adjustment method to process a batch of workpieces, the essence of positioning error is the maximum variation of process datum in the direction of processing dimension. There is no location error in the process of cutting.

The location error is caused by the manufacturing error of the workpiece and the manufacturing error of the positioning element. The matching gap between the two parts and the process datum do not coincide with the positioning datum.

Standard non coincidence error

When the machining error is caused by the non coincidence of the positioning datum and the working procedure datum, it is called the datum non coincidence error. The size of the error is equal to the tolerance between the positioning datum and the working procedure datum, which is expressed in Delta B.

When the reference displacement error is located in the fixture, the positioning datum and the limit datum can not be reclosed because of the manufacturing tolerance and the minimum fit clearance of the positioning element in the fixture base surface of the workpiece. This makes the position of the workpiece inconsistencies and causes the error of the working size. This error is called the error. The error of the reference displacement is expressed in Delta Y. Figure 1-12a is a process diagram of circular grooves and key grooves. The working procedure is A and B. Fig. 1-12b is a schematic diagram of machining. The inner hole D of the workpiece is positioned on the cylindrical mandrel, O is the axis of the mandrel, and the C is the size of the cutter. The process datum of size A is the axis of the inner hole, and the positioning datum is also the axis of the inner hole. The two coincide, and the delta B = 0. However, because of the manufacturing tolerance and the minimum fit gap between the inner hole surface of the workpiece and the axis cylinder, the positioning datum (the axis of the workpiece hole) can not coincide with the limit reference (Axis axis). The positioning datum moves a segment of the distance relative to the limit datum, because the tool is adjusted to the position of a batch of workpiece after adjusting the position. Set no longer change (same as the limit reference position). Therefore, the position change of the positioning datum affects the size of the size A, causing error to the size A, which is the reference displacement error.

CNC Turning for RC Car Wheel

Our multiple axis CNC turning centers enable us to manufacture very complex parts with shorter lead times in both production and prototype size lots. We are machining service for metal parts, turning parts, cnc parts, Springs,coldforming parts, machining parts, screw machine parts, casting parts, forging parts supplier,Undertake all types of large lathe processing business, according to customer requirements and plans to sample processing, price concessions , better quality, timely delivery.

machining parts: Hydraulic, valve, flange, automobile, shaft, bearing housing Bar, plate,welded part, marine part, winch part, sheet metal Equipment: Common lathe,CNC Machine,Milling,Turning,Stamping Machine,Spring Machine

Metal Process: CNC turning, milling, drilling, planning, grinding, welding. Surface Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint,anodize, powder coating, brush, Polish Technical: Dedicated mechanical designer, experienced worker 3D design service inclusive of modeling, analysis and detailed drawing at normal cost

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In order to avoid the speed reducer cannot pass the factory test, one of the reasons is the existence of intermittent high noise in the reducer; the low noise reducer is 72.3Db (A) with the ND6 precision sound level meter, and the high noise reducer is 82.5dB (A), which can not reach the factory requirements. After repeated tests, analysis and improvement tests, the conclusion is that it is necessary to comprehensively control every link of production so as to effectively reduce the noise of gear transmission.

1, control the precision of gear: the basic requirements of gear accuracy: through practice, the precision of gear must be controlled in the GB10995 887~8 level, the line speed is higher than the 20m/s gear, the limit deviation of the tooth distance, the radial runout tolerance of the ring gear and the tolerance of the tooth direction must be stable to the 7 level precision. In order to achieve the 7 grade precision gear, the teeth should be inverted, and the root of the tooth should be strictly protected.

2, control the quality of raw materials: high quality raw materials are the prerequisites for the production of high quality products. Our company’s largest materials 40Cr and 45 steel make gears. No matter what way, raw materials must undergo strict chemical composition test, grain size measurement and purity evaluation after they are finished. The purpose is to adjust the deformation of heat treatment in time and improve the quality of tooth profile machining.

3, to prevent heat treatment deformation: gear blanks after rough machining into fine forgings, normalizing or quenching and tempering to achieve:

(1) soften steel parts for cutting.

(2) elimination of residual stress;

(3) refining grain and improving microstructure to improve mechanical properties of steel.

(4) prepare for the eventual handling of organizational readiness. It should be noted that in normalizing or tempering treatment, the temperature of the furnace must be kept uniform and the work position appliance is adopted to heat and cool the workpiece evenly and strictly forbidden to be stacked together. The gear that needs drilling to lighten weight should be arranged after heat treatment. The final heat treatment of the gear is used to quench the tooth surface with small deformation, and the tooth surface after high frequency quenching has high strength, hardness, wear resistance and fatigue limit, while the heart still maintains sufficient plasticity and toughness. To reduce the deformation. Low quenching temperature and shorter heating time, uniform heating and slow cooling should be adopted for high frequency quenching of tooth surfaces.

4, to ensure the precision of the tooth blank: the precision of the size of the gear hole needs to be around the middle difference of the deviation value of the hole, which is set at + 0.003~ + 0.005mm; if the super difference is in the range of the design requirements of the hole, it must be classified and transferred to the cutting process respectively. The end face runout and radial runout of gear blanks are 6 levels, set in the range of 0.01~0.02mm.

5, cutting processing measures: for purchased gear cutting tools must be tested, must meet the AA level requirements. When the gear tool is sharpened, the radial of the front edge of the cutter, the difference of the adjacent circumference of the chip tank, the maximum cumulative error of the circumferential section of the chip, and the parallelism between the front of the cutter tooth and the axis of the inner hole must be tested. On the premise of not affecting the strength of gear, the coefficient of tooth top height is increased, the 0.05~0.1m is increased, the tooth top height coefficient of the cutter is improved, and the gear root interference is avoided. The gear of M=1~2 is made by gear hob with the top of tooth, and the amount of repair is R=0.1~0.15m. Eliminate the burr on the top of the gear and improve the interference at the top of the gear. The gear cutting equipment must carry out a precision check every year. If it fails to meet the requirements, it must be repaired. The operator also has to carry out self-examination, especially in the radial clearance of the spindle of the machine tool under 0.01mm, the cutter shaft diameter less than 0.005mm, and the cutter shaft moving below 0.008mm. Tool installation accuracy: the tool radial runout is controlled below 0.003mm, and the end face is 0.004mm below. The accuracy of cutting tooling, the gap between spindle diameter and workpiece hole is guaranteed to be within 0.001~0.004mm. The thread on the spindle must be positioned under the top class, grinding by the thread bed: the perpendicularity is less than 0.003mm, and the diameter is less than 0.005mm. The nut must be ensured that the internal thread is fitted with the datum plane once, and the parallelism of the gasket is less than 0.003mm.

6, civilized production: more than 30% of gear transmission noise comes from burrs and bumps. It is a passive practice for some factories to remove burrs and bruises before gear boxes are assembled. (1) gear shaft parts, the gear hobbing teeth immediately put on the special plastic protective sleeve then into the next process, and with a special plastic protective sleeve to the storage and delivery. (2) honing process, reducing the roughness of the tooth surface, removing burrs, and preventing knock injuries, can effectively reduce gear transmission noise.

7, take other materials and heat treatment, surface treatment methods: (1) can use powder metallurgy molding technology, gear forming after tooth high frequency quenching. (2) use soft iron and gear to process soft nitriding. (3) using 40Cr material, after gear cutting, soft nitriding or copper plating on teeth is used. In a comprehensive way, the noise of the gear transmission should be cured, the gear material and heat treatment are essential, the precision of the tooth billet is guaranteed, the gear precision is the key and the civilized production is the foundation.

CNC turning For Flashlight sleeve

Our multiple axis CNC turning centers enable us to manufacture very complex parts with shorter lead times in both production and prototype size lots. We are machining service for metal parts, turning parts, cnc parts, Springs,coldforming parts, machining parts, screw machine parts, casting parts, forging parts supplier,Undertake all types of large lathe processing business, according to customer requirements and plans to sample processing, price concessions , better quality, timely delivery.

machining parts: Hydraulic, valve, flange, automobile, shaft, bearing housing Bar, plate,welded part, marine part, winch part, sheet metal Equipment: Common lathe,CNC Machine,Milling,Turning,Stamping Machine,Spring Machine

Metal Process: CNC turning, milling, drilling, planning, grinding, welding. Surface Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint,anodize, powder coating, brush, Polish Technical: Dedicated mechanical designer, experienced worker 3D design service inclusive of modeling, analysis and detailed drawing at normal cost

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According to the principle of selection of measuring instruments, appropriate measuring instruments should be selected for measurement. The metrological work of measuring instruments should follow the maintenance, repair and appraisal plans of measuring instruments, and ensure the accuracy, sensitivity and accuracy of the gauges used. For the correct use of measuring instruments, please refer to the use instructions or relevant reference materials for light and light, keep clean, antirust, anti vibration, reasonable storage and storage.
One, flat plate
1, the steel plate is usually used for cold work and sample dressing; the cast iron plate can be used as a grinding tool, except for the steel plate use; the marble plate does not have to be coated with antirust grease and is less affected by the temperature, but it is easily deformed when the humidity is high.
The 2, 0, 1, and 2 grade plates are generally used for inspection, and 3 level plates are generally used for marking.
3, the flat plate is stable, generally adjusting the horizontal plane with three supporting points. The supporting points of large plates should be cushionless and stable, but they must not be destroyed, and the force must be uniform so as to reduce self weight and form.
4, the flat should avoid excessive wear due to frequent local use, avoid heat source and acid base corrosion during use.
5, flat panel should not withstand impact, heavy pressure or long time stacking of goods.
Two. The sample straight ruler and the flat ruler
1. When the ruler is used, it is not allowed to collide. The integrity of the edges should be ensured, and the holding part of the insulation plate should be held to avoid the influence of temperature on the accuracy and rust.
2. Before measuring, the measuring surface of the ruler should not be scratched, bruised or corroded. The surface should be clean and bright.
3. There should be no erosion, spots, scales, pits, cracks and other defects in the flat face. A flat ruler should be free of magnetic.
4, in general, different precision leveling rods should be selected according to different requirements.
Three. Right angle ruler
The 1, 00 and 0 level straightening square is generally used for testing precision measuring tools; 1 is used for testing precision workpieces; 2 is used for testing general workpieces.
2, before use, we should first check whether the faces and edges are bruised. The left side, right side and short side of the long side of the square are all workpiece faces (i.e. inside and outside right angles). Clean the face of the ruler and the inspected face.
3. When using, the straightening angle ruler is placed on the working surface of the workpiece to be tested, and the light gap method is used to identify whether the angle of the workpiece is correct. Attention should be taken lightly, lightly and lightly to prevent distortion.
4. In order to find the accurate measurement results, the straightness angle ruler can be turned over 180 degrees again, and the arithmetic mean value of the two readings is taken as the result of the measurement, and the deviation of the angle ruler itself can be eliminated.
Four. The universal angle ruler
1, before using, the first universal angle wiping clean, and then check whether the interaction of each component moves smoothly and reliably, the reading after the stop is not moving, and then to zero position.
2, when measuring, the screw cap on the brake is relaxed, the main ruler seat is moved, and the hand on the back of the cursor is adjusted carefully until the two measuring surface of the angle ruler is in close contact with the working face of the measured workpiece. Then screw the nut on the brake to be fixed and read.
3. After the measurement is finished, apply the gasoline to wash the universal angle ruler, wipe it carefully with clean gauze, apply antirust oil, and then put it into the box.
Five, vernier caliper
1, before use, we should clean the dust and oil pollution on the surface of the workpiece and the measured workpiece, so as not to hurt the vernier caliper and influence the measuring accuracy, and at the same time check the interaction of each part. If the frame and micro motion are flexible, can the fastening screws work?
2, check the vernier caliper zero position, make the vernier caliper two claw close closely, observe without obvious light gap with the eye, observe whether the vernier zero line is aligned with the zero line of the ruler, and whether the end line of the vernier and the corresponding line of the ruler body are aligned. It is best to close the vernier caliper measuring claw three times to see if the readings are consistent. If the three reading is not zero, but the reading number is exactly the same as the three time, it can be recorded and corrected during the measurement.
3. When using, we should master the pressure of the working surface at the same time at the same time. It can not be too big or too small. It just makes the measuring surface contact with the workpiece. At the same time, the claw can also slide freely along the surface of the workpiece. Vernier calipers with fretting devices should be used with fretting devices.
4. When the vernier caliper is read, the vernier caliper should be horizontally taken in the direction of light, so that the line of sight is perpendicular to the scale line read on the ruler so as not to cause reading error due to the skew of the line of sight. It is better to measure many times in the same position of the workpiece and get its average value.
5. When measuring the outer size, after reading the reading number, we should not pull the downstream marking card from the measured workpiece and open the claw out. After measuring the inner dimension reading, the quantity of the claw should be slid along the center line of the hole to prevent the skew, or the measuring accuracy will be affected by the wear, the sprain, the deformation or the movement of the scale frame.
6, you can not use vernier calipers to measure moving parts. In this way, the vernier caliper is easy to be seriously worn and easy to cause accidents.
7. No vernier callipers can be used instead of calipers to pull back and forth on the workpiece. When you use vernier calipers, you must not work hard against the work to prevent damage to vernier calipers.
8, the vernier caliper should not be placed near the strong magnetic field, such as the magnetic worktable of the grinder, so as not to make the caliper feel magnetized and affect the use.
9. After use, wipe the vernier caliper clean and put it in the special box, especially the large size vernier caliper. Attention to rust prevention, main ruler bending deformation.
Six. High vernier caliper
1, before use, check whether there are burrs or abrasions on the working face of the base, the working face of the base and inspection

CNC Milling for Handle

ChengChuang Milling workshop is a certain set of professional CNC milling parts machine production. Such as AL,Aluminum, stainless steel, copper, steel and so metal parts processing,high quality, low price, low cost OEM CNC Milling service. Our service for machining parts, metal stamping parts, turning parts, cnc parts, Springs,coldforming parts, machining parts, screw machine parts, casting parts, forging parts supplier, We can produce machined parts according to your requirements.

machining parts: Hydraulic, valve, flange, automobile, shaft, bearing housing Bar, plate,welded part, marine part, winch part, sheet metal Equipment: Common lathe,CNC Machine,Milling,Turning,Stamping Machine,Spring Machine

Metal Process: CNC turning, milling, drilling, planning, grinding, welding. Surface Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint,anodize, powder coating, brush, Polish Technical: Dedicated mechanical designer, experienced worker 3D design service inclusive of modeling, analysis and detailed drawing at normal cost

Quality: ISO 9001: 2008
Control strictly and follow specification
Move fast to meet your urgent need caused by accident.
Packing: Wooden case, hardboard, steel pallet, according to customs requirements
If you want to know more about cnc milling parts in China, Please contact us.

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When selecting NC milling contents, we should give full play to the advantages and key functions of CNC milling machines. The contents of the NC milling process are as follows: (1) the curve contour on the workpiece, the straight line, the arc, the thread or the spiral curve, especially the curvilinear contour, such as the non circular curve and the list curve given by the mathematical expression. (2) the space curve or surface of the mathematical model has been given. (3) although the shape is simple, it has many sizes and difficult parts to detect. (4) internal cavity, cabinet and so on which are difficult to observe, control and detect by ordinary machine tools. (5) holes or planes with strict size requirements. (6) a simple surface or shape that can be machined in one clip. (7) CNC milling process can effectively increase productivity and reduce labor intensity.
The main processing objects suitable for NC milling include the following parts: plane contour parts, variable angle parts, space curved surface contour parts, holes and threads, etc.

CNC Machining for Spring mount

Our workshop is machining services for CNC Machining parts, metal stamping parts, turning parts, cnc parts, Springs,coldforming parts, machining parts, screw machine parts, casting parts, forging parts supplier, Wecan produce machined parts according to your requirements.

machining parts: Hydraulic, valve, flange, automobile, shaft, bearing housing Bar, plate,welded part, marine part, winch part, sheet metal Equipment: Common lathe,CNC Machine,Milling,Turning,Stamping Machine,Spring Machine

Metal Process: CNC turning, milling, drilling, planning, grinding, welding. Surface Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint,anodize, powder coating, brush, Polish Technical: Dedicated mechanical designer, experienced worker 3D design service inclusive of modeling, analysis and detailed drawing at normal cost

Quality: ISO 9001: 2008
Control strictly and follow specification
Move fast to meet your urgent need caused by accident.
Packing: Wooden case, hardboard, steel pallet, accord

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The components of the art system, including the manufacturing error of the machine tool, the tool and the fixture, the installation error and the wear in the use have a direct impact on the machining accuracy of the workpiece. In other words, in the process of processing, the process system will produce a variety of errors, which will change the position of the tool and workpiece in the process of cutting motion and influence the machining accuracy of the parts. These errors are related to the structural state and cutting process of the process system, and the main factors causing machining errors are:
(1) the geometric error of the system

The error of processing principle

The error of the machining principle is due to the error caused by the approximate machining movement or the approximate tool profile. Because of the error in the machining principle, it is called the machining principle error. As long as the principle error is within the allowable range, the machining method is still feasible.

Geometric error of machine tool

The manufacturing error, installation error and wear in the machine tool directly affect the machining accuracy of the workpiece. Among them are the spindle rotation of machine tool, the linear movement of machine tool guide and the error of machine tool drive chain.

Manufacturing error and wear of cutting tools

The manufacturing error, installation error and wear of the tool affect the machining accuracy of the workpiece. During the cutting process, the cutting edge and blade face are strongly rubbed with the workpiece and chip, causing the tool to wear. When the tool wear reaches a certain value, the surface roughness of the workpiece increases, and the chip color and shape change, accompanied by vibration. Tool wear will directly affect cutting productivity, machining quality and cost.

Jig error

The fixture error includes positioning error, clamping error, fixture installation error and tool setting error. These errors are mainly related to the accuracy of fixture manufacturing and assembly. The positioning error of the fixture will be analyzed in detail.

The position of the workpiece in the fixture is determined by the contact between the positioning base and the locating element. However, due to the manufacturing error of the positioning base surface and the working surface of the positioning element, the actual position of each workpiece in the fixture is not consistent. After processing, the size of each workpiece must vary in size, resulting in errors. The machining error caused by the incorrect positioning of the workpiece on the fixture is called the positioning error and is expressed by delta D. It includes reference displacement error and datum non coincidence error. When using adjustment method to process a batch of workpieces, the essence of positioning error is the maximum variation of process datum in the direction of processing dimension. There is no location error in the process of cutting.

The location error is caused by the manufacturing error of the workpiece and the manufacturing error of the positioning element. The matching gap between the two parts and the process datum do not coincide with the positioning datum.

Standard non coincidence error

When the machining error is caused by the non coincidence of the positioning datum and the working procedure datum, it is called the datum non coincidence error. The size of the error is equal to the tolerance between the positioning datum and the working procedure datum, which is expressed in Delta B.

When the reference displacement error is located in the fixture, the positioning datum and the limit datum can not be reclosed because of the manufacturing tolerance and the minimum fit clearance of the positioning element in the fixture base surface of the workpiece. This makes the position of the workpiece inconsistencies and causes the error of the working size. This error is called the error. The error of the reference displacement is expressed in Delta Y. Figure 1-12a is a process diagram of circular grooves and key grooves. The working procedure is A and B. Fig. 1-12b is a schematic diagram of machining. The inner hole D of the workpiece is positioned on the cylindrical mandrel, O is the axis of the mandrel, and the C is the size of the cutter. The process datum of size A is the axis of the inner hole, and the positioning datum is also the axis of the inner hole. The two coincide, and the delta B = 0. However, because of the manufacturing tolerance and the minimum fit gap between the inner hole surface of the workpiece and the axis cylinder, the positioning datum (the axis of the workpiece hole) can not coincide with the limit reference (Axis axis). The positioning datum moves a segment of the distance relative to the limit datum, because the tool is adjusted to the position of a batch of workpiece after adjusting the position. Set no longer change (same as the limit reference position). Therefore, the position change of the positioning datum affects the size of the size A, causing error to the size A, which is the reference displacement error.

CNC Turning for connector

Our multiple axis CNC turning centers enable us to manufacture very complex parts with shorter lead times in both production and prototype size lots. We are machining service for metal parts, turning parts, cnc parts, Springs,coldforming parts, machining parts, screw machine parts, casting parts, forging parts supplier,Undertake all types of large lathe processing business, according to customer requirements and plans to sample processing, price concessions , better quality, timely delivery.

machining parts: Hydraulic, valve, flange, automobile, shaft, bearing housing Bar, plate,welded part, marine part, winch part, sheet metal Equipment: Common lathe,CNC Machine,Milling,Turning,Stamping Machine,Spring Machine

Metal Process: CNC turning, milling, drilling, planning, grinding, welding. Surface Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint,anodize, powder coating, brush, Polish Technical: Dedicated mechanical designer, experienced worker 3D design service inclusive of modeling, analysis and detailed drawing at normal cost

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The component of NC: CNC (NC machine tool) is the abbreviation of the computer digital control machine tool (Computer numerical control). It is an automatic machine tool with a program control system. The control system can logically process the program with control code or other symbol instructions, and decode it, so that the machine tool can move and process parts.

The advantages of CNC: host, he is the theme of CNC machine tools, including machine body, column, spindle, feed mechanism and other mechanical components. He is used to complete various cutting parts.
Numerical control device is the core of CNC machine tools, including hardware (printed circuit board, CRT display, key box, paper tape reader, etc.) and corresponding software, which is used to input digital parts program, and the storage of input information, data transformation, interpolation operation and various control functions.
Drive device, which is the driving part of CNC machine tool actuators, including spindle drive unit, feed unit, spindle motor and feed motor. Under the control of the numerical control device, he realizes the spindle and feed drive through electrical or electro hydraulic servo system. When several feed linkage is completed, positioning, straight line, plane curve and space curve can be completed.
Auxiliary equipment, the necessary components of the index control machine tools, to ensure the operation of CNC machine tools, such as cooling, chip cutting, lubrication, lighting, monitoring and so on. It includes hydraulic and pneumatic devices, chip removal device, exchange worktable, CNC turntable and CNC dividing head, and also includes cutting tools and monitoring and testing devices.
Programming and other ancillary equipment can be used for programming and storing parts outside the machine.

Machining center has high machining accuracy and stable machining quality.
It can carry out multi coordinate linkage and process complex parts.
When machining parts change, it is generally necessary to change the NC program and save production preparation time.
The machine tool itself has high accuracy and rigidity, and can choose the favorable processing amount and high productivity (usually 3~5 times of ordinary machine tools).
The machine is highly automated and can reduce labor intensity.
The requirements for the quality of the operators are high, and the technical requirements for the maintenance personnel are even higher.

Machining center is a highly automated multi-function CNC machine tool with tool magazine and automatic tool changer. After one clip is installed on the machining center, the workpiece can be processed on more than two surfaces, and there are many kinds of knife changing or cutting tool function, thus the production efficiency is greatly improved.
Machining centers are divided i

CNC Turning for aluminium sheath

Our multiple axis CNC turning centers enable us to manufacture very complex parts with shorter lead times in both production and prototype size lots. We are machining service for metal parts, turning parts, cnc parts, Springs,coldforming parts, machining parts, screw machine parts, casting parts, forging parts supplier,Undertake all types of large lathe processing business, according to customer requirements and plans to sample processing, price concessions , better quality, timely delivery.

machining parts: Hydraulic, valve, flange, automobile, shaft, bearing housing Bar, plate,welded part, marine part, winch part, sheet metal Equipment: Common lathe,CNC Machine,Milling,Turning,Stamping Machine,Spring Machine

Metal Process: CNC turning, milling, drilling, planning, grinding, welding. Surface Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint,anodize, powder coating, brush, Polish Technical: Dedicated mechanical designer, experienced worker 3D design service inclusive of modeling, analysis and detailed drawing at normal cost

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CNC NC machine tool is a kind of high and new technology which combines the advanced technology such as computer technology, automatic control technology, automatic detection technology and precision mechanical design and manufacture. It is a typical mechanical and electrical integration product with high technology density and high automation.
Compared with ordinary machine tools, NC machine tool not only has the characteristics of high precision of parts processing, high production efficiency and high automation of product quality, but also can complete the parts processing of complex surface which is difficult to complete or cannot be machined by ordinary machine tools. Therefore, the position of digital control machine tool in the machinery manufacturing industry appears to appear. It is becoming more and more important. We can even say this: in the machinery manufacturing industry, the grade and quantity of CNC machine tools is an important symbol to reflect the manufacturing capability of an enterprise. In enterprise production, CNC machine tools can achieve the goal of high processing precision, stable product quality and higher production efficiency. This not only depends on the accuracy and performance of the machine tool itself, but also to a large extent, it is closely related to the operator in the production of CNC machine tools in the maintenance and use of the machine. At the same time, we should also notice that the concept of the maintenance of CNC machine tools can not simply understand that the mechanical parts and other parts of the CNC system or the CNC machine tools are only dependent on the maintenance personnel how to remove the faults and repair them in time, so that the CNC machine bed can be put into use as soon as possible. This should include proper use and routine maintenance. In the two aspects, only by insisting on the daily maintenance of the machine tools can we prolong the service life of the components, prolong the wear cycle of the mechanical parts, prevent the occurrence of accidental malpractice, and strive for the long and stable work of the machine tools, and make full use of the machining advantages of the machine tools to achieve the numerical control machine. The technical performance of the bed ensures the normal work of the CNC machine tools. Therefore, it is very important to maintain and maintain the CNC machine tool for the operator of the CNC machine tool or the maintenance personnel of the CNC machine tools. We must pay great attention to it.

Machining center has high machining accuracy and stable machining quality.
It can carry out multi coordinate linkage and process complex parts.
When machining parts change, it is generally necessary to change the NC program and save production preparation time.
The machine tool itself has high accuracy and rigidity, and can choose the favorable processing amount and high productivity (usually 3~5 times of ordinary machine tools).
The machine is highly automated and can reduce labor intensity.
The requirements for the quality of the operators are high, and the technical requirements for the maintenance personnel are even higher.

Machining center is a highly automated multi-function CNC machine tool with tool magazine and automatic tool changer. After one clip is installed on the machining center, the workpiece can be processed on more than two surfaces, and there are many kinds of knife changing or cutting tool function, thus the production efficiency is greatly improved.
Machining centers are divided into two categories: boring, milling and turning according to their processing procedures. According to the number of control axes, machining centers can be divided into three axis, four axis and five axis machining centers.

CNC Machining for automobile gear

Our workshop is machining services for CNC Machining parts, metal stamping parts, turning parts, cnc parts, Springs,coldforming parts, machining parts, screw machine parts, casting parts, forging parts supplier, Wecan produce machined parts according to your requirements

.machining parts: Hydraulic, valve, flange, automobile, shaft, bearing housing Bar, plate,welded part, marine part, winch part, sheet metal Equipment: Common lathe,CNC Machine,Milling,Turning,Stamping Machine,Spring Machine

Metal Process: CNC turning, milling, drilling, planning, grinding, welding. Surface Treat: Zn (Cr3 RoHS free or Cr6 ) plated, Cr /Ni plated, hot-dip galvanizing, paint,anodize, powder coating, brush, Polish Technical: Dedicated mechanical designer, experienced worker 3D design service inclusive of modeling, analysis and detailed drawing at normal cost

Quality: ISO 9001: 2008 Control strictly and follow specification Move fast to meet your urgent need caused by accident.
Packing: Wooden case, hardboard, steel pallet, according to custom’s requirements

If you want to know more about cnc machining parts in China, Please contact us.