Machinery industry – Page 9 – CNC Machining & Turning, Milling, Metal parts

Features of precision grinder – computer gong

So what are the characteristics of gantry precision grinder processing?

Taiwan ball screw is equipped on the bed, beam and end milling head, which is driven by servo motor.
The unique cross beam lifting safety interlock device ensures the repeated positioning accuracy of the machine tool.
The side milling head is equipped with V5 gantry milling head, the computer gong processing is equipped with independent lubrication device, the lifting is driven by ordinary reducer, and the frequency control is adopted.
The end milling head of gantry precision grinder is equipped with tx400 heavy gantry milling head, double rectangular guide rail and strong rigidity; the milling head is equipped with ball screw, pneumatic broach device and driven by servo motor.
The general milling / NC milling one key conversion three-axis CNC system of gantry precision grinding machine is programmable and can be operated manually by using the extended panel, which has strong practicability in the actual machining process.

Do not cut off the connection of protective device when overhaul the electrical equipment of large water mill.

Electrical maintenance personnel should wear insulating gloves and rubber shoes to avoid electric accidents. And do not wear metal jewelry and other conductive articles that may lead to false electric shock.

Before overhauling the electrical equipment, pay attention to follow the instructions of the relevant warning plate, and use the appropriate three watt hour meter to confirm that the circuit is open circuit.

When overhauling the electrical equipment of the large gantry grinder, the main power switch must be cut off, and warning signs must be erected, so as to avoid the accidental injury caused by the reactivation of the large water mill without the knowledge of others.

When the motor is activated in the grinding machine, there may be sparks at the contact point of the electrical box, so the machine can not be used in dust, gas explosion and flammable places.

The electric box of large water mill is designed for the safe operation of the machine. No one is allowed to modify the structure and circuit design of the electric box without the authorization of our company.

The operator must be familiar with the position of emergency stop switch and main power activation switch of large water mill. In case of emergency, the machine can be stopped and the power can be cut off at the first time.

Process specification is one of the process documents that stipulate the machining process and operation method of parts. It is written into the process in accordance with the specified form for the machining of mechanical parts under the specific production conditions. The large-scale computer CNC machining center is a kind of CNC machining center with tool magazine and can automatically replace the tool, which can control the workpiece at a certain speed CNC machine tools for a variety of processing operations.

Large computer gong machining center is usually classified by the relative position of spindle and worktable, which is divided into horizontal, vertical and multi axis linkage machining center.

A horizontal machining center: it refers to the machining center with the spindle axis parallel to the workbench, which is mainly suitable for machining box parts.

B vertical machining center: it refers to the machining center with the spindle axis perpendicular to the worktable, which is mainly suitable for processing plate, plate, mold and small shell complex parts. C multi axis linkage machining center, also known as universal machining center, refers to the machining center that can control linkage change through the angle between the spindle axis and the rotary axis of the worktable to complete the machining of complex spatial surface. It is suitable for machining impeller rotor, mould, cutting tool and other workpieces with complex space surface.

After the machined parts are clamped once, the CNC system can control the machine tool to automatically select and replace the cutting tools according to different processes; automatically change the spindle speed of the machine tool, the feed rate of Dongguan CNC machining center, the movement path of the cutting tool relative to the workpiece and other auxiliary functions, and continuously carry out multiple processes such as drilling, countersinking, reaming, boring, tapping, milling, etc Processing.

Because the early CNC system of milling machine does not have the function of function calculation, it is difficult to work out the processing program of function equation curve directly with G code, and the CAD / CAM software (with lower version) usually does not have the function of inputting graph directly from equation, so it is very difficult to process the contour of function equation curve.

The programming method of machining center: the contour composed of simple contour line and arc is directly programmed with G code of NC system. In this paper, the complex outline of three-dimensional curved surface is drawn with CAD / CAM software in the computer. According to the type of curved surface, the corresponding parameters are set, and the NC machining program is automatically generated. The above two programming methods can basically meet the requirements of NC machining.

The process of large-scale mechanical parts processing plant is to change the shape, size, relative position and nature of the production object on the basis of the process, so as to make it into finished or semi-finished products. It is the detailed description of each step and each process,

The specific technical requirements are as follows: ‘

(1) Remove oxide scale from parts.

(2) The unmarked shape tolerance shall meet the requirements of gb1184-80, and the allowable deviation of unmarked length dimension shall be ± 0.5mm. The tolerance zone of casting is symmetrical to the basic dimension configuration of blank casting.

(3) When assembling rolling bearings, it is allowed to use oil heating for hot charging, and the oil temperature shall not exceed 100 ℃. There should be no scratch, scratch and other defects on the surface of parts.

(4) When assembling the hydraulic system, it is allowed to use sealing packing or sealant, but it should be prevented from entering the system. Before assembly, the main fit dimensions of parts and components, especially the interference fit dimensions and relevant accuracy shall be rechecked.

(5) The parts and components to be assembled must have the certificate of inspection department before they can be assembled. Parts must be cleaned and cleaned before assembly, without burr, flash, oxide scale, rust, chip, oil stain, colorant and dust.

(6) Parts shall not be knocked, touched, scratched or rusted during assembly. When fastening screws, bolts and nuts, it is strictly forbidden to strike or use improper screwdrivers and spanners. After tightening, the screw groove, nut, screw and bolt head shall not be damaged. For fasteners with specified tightening torque requirements, torque wrench must be used and tightened according to specified tightening torque. After bonding, the excess adhesive should be removed. The semicircular holes of the bearing outer ring, the open bearing seat and the bearing cover shall not be stuck; the semicircular holes of the bearing outer ring, the open bearing seat and the bearing cover shall be in good contact, and they shall be in uniform contact with the bearing seat within the range of 120 ° symmetrical to the center line, and the machining of Dongguan Mechanical parts and the bearing cover within the range of 90 ° symmetrical to the center line. When checking with a feeler gauge within the above range, the 0.03mm feeler gauge shall not be inserted into 1 / 3 of the outer ring width. After assembly, the outer ring of the bearing shall contact the end face of the bearing cover at the locating end evenly.

In the process of processing large parts, we still need to pay attention to the safety aspects

The cutting tool must be clamped firmly, otherwise it is not allowed to drive.
When moving the worktable and tool rest, loosen the fixing screw first.
When milling various workpieces, especially during rough milling, slow cutting should be carried out at the beginning.
When loading and unloading tools, use copper hammer or wooden mallet to gently hit to prevent tool fragments from flying out and injuring people.
Before work, check the operation of the transmission part of the machine tool, and install the baffle of the machine tool before operation.
The work object should be clamped with pressing plate, screw or special tool. The general wrench is not allowed to add casing, so as to avoid slipping and injury.

High speed Gong processing requirements

The surface quality standard of high speed computer gong parts

1、 The purpose and action of high speed Gong processing temperature control on formability. The appearance of products, physical properties of materials and forming cycle are significantly affected by die core temperature. In general, it is ideal to keep the core temperature low to increase the injection times. However, the forming cycle related to the shape of the product (core structure) and the type of finished material also depends on the need to increase the core filling temperature.

2、 In order to prevent the temperature control of stress, this is the problem of forming material, the only requirement is cooling rate. The cooling time is short. Even if some parts are hardened and some parts are soft, the stress caused by uneven shrinkage can be avoided. That is to say, proper temperature control can improve the properties of cooling stress.

3、 Temperature control of crystallizing degree adjustment of forming material. High molding temperature is usually required to adjust the degree of crystallization and improve the mechanical properties of crystalline materials such as polyamide, polyacetate and polypropylene.

Computer gong processing fastening parts, check whether the fastening parts loose, damage phenomenon, the way is to find the same specification of metal stamping parts for replacement.
The edge of metal stamping must be ground after a long time of use. After grinding, the edge surface must be demagnetized without magnetism, otherwise the metal stamping is prone to material blocking.
The punch is easy to break, bend and gnaw in the process of metal mold processing. The punch sleeve is generally gnawed. The damage of the punch and the punch sleeve of metal stamping is generally replaced with parts of the same specification. The punch parameters mainly include the size of the working part, the size of the installation part and the length size.
High speed Gong processing hardware stamping parts, such as pressure plate, uniglue, etc., discharge parts, such as stripper, pneumatic top material, etc., during maintenance, check the parts of the relationship and whether there is damage, repair the damaged parts, pneumatic top material check whether there is air leakage, and take measures for the specific situation, such as the replacement of air pipe damage.

Basic program of large computer gong processing

Large scale computer gong processing accuracy requirements, a mold is generally composed of female mold, male mold and mold base, some may also be multi-component module. Therefore, the combination of upper and lower die, the combination of insert and cavity, and the combination between modules all require high machining accuracy. The dimensional accuracy of precision die for machining mechanical parts is often up to μ m level.
The shape and surface of some products, such as automobile panels, aircraft parts, toys and household appliances, are complex. The surface of the shape is composed of a variety of curved surfaces. Therefore, the cavity surface of the mold is very complex. Some surfaces must be treated mathematically.
The production of small batch mold is not mass production, in many cases, only one batch is produced.
There are many working procedures for large-scale computer gong, and many working procedures such as milling, boring, drilling, reaming and tapping are always used in mold processing.
The service life of repetitive production mould is long. When the service life of a pair of molds exceeds its service life, it is necessary to replace the new molds, so the production of molds is often repetitive.
In the mold production of copying process, sometimes there is neither drawing nor data, and the copying process should be carried out according to the real object. This requires high imitation accuracy and no deformation.
Large computer gong processing mold material is excellent, high hardness, the main material of the mold is made of high-quality alloy steel, especially high life mold steel. This kind of steel has strict requirements from blank forging, processing to heat treatment. Therefore, the establishment of processing technology can not be ignored, and heat treatment deformation is also a serious problem in processing. The basic operation of high-speed Gong machining requires that the working performance of high-speed Gong machining center is an important prerequisite for mold manufacturing industry to process mold efficiently and accurately. Driven by drive technology, many different types of high-speed machining centers with innovative structure and excellent performance have emerged. Do not place obstacles around the high-speed machining center to ensure that the working space is large enough; do not splash water or oil on the ground to ensure that the working ground is clean and dry; do not move or damage the warning signs installed on the machine tool to ensure that the safety warning signs are bright and eye-catching. Don’t touch the switch with wet hands, otherwise it will cause electric shock; before pressing the switch, make sure it is correct, so as to avoid danger caused by wrong connection; be familiar with the position of the emergency stop button, and make sure that you can press it when you need to use it.

Processing copper parts with computer gong

Precision copper processing in our daily life, we often encounter a variety of copper, mechanical parts processing, some products for copper processing technology requirements are very high, the process is not the same, for the processing of product scale is also to have a certain understanding, and then according to the sketch to make mold, so the sketch is very important, in the lamp material copper processing This material is not easy to rust, but also has a long service life. This material is not easy to be cut, and can be made into various shapes. The most important point is that it is conducive to the melting treatment of objects.

And copper alloy is easy to oxidize and change color after pickling. After pickling, copper parts can be immersed in anti tarnishing agent for several minutes, which can effectively prevent copper parts from changing color. The commonly used anti tarnishing agent is ab-712. Take 1 liter working solution as an example, take 70 ml ab-712 anti tarnishing agent, add 930 ml distilled water, stir evenly, and then use it.

BH anti discoloration agent can also be used. BH anti discoloration agent for precision copper parts processing is suitable for anti discoloration treatment of copper and copper alloy chemical polishing parts, copper plating and copper alloy (imitation gold, etc.) parts before coating, anti discoloration treatment of barrel nickel plating parts, composite anti discoloration treatment of silver plating, gold plating and electroplating imitation gold parts after electrolytic passivation, so as to improve its anti discoloration effect. It can also be used for fixation of copper and copper alloy parts after dyeing. It is a new process of chromium free, low pollution and environmental protection.

The polishing solution does not contain chromic acid, which meets the requirements of today’s environmental protection and saves the investment of environmental protection equipment and waste water treatment costs.
The current density of polishing is smaller than that of traditional process, so it not only has low power consumption and long service life of polishing solution, but also is more suitable for surface polishing of large aluminum and aluminum alloy parts.
Precision copper processing has a wide range of applications. CNC machine tools are suitable for processing pure aluminum and various types of aluminum alloys with silicon content more than 2%.

Composition and operating conditions of polishing solution

Concentrated phosphoric acid (specific gravity 1.74) 70% (weight)

Yb-66 additive 30% (weight)

Precision copper processing temperature 55 – 65 ℃, the best 60 ℃

Anode current density, Da 2 – 8 A / DM2 (without stirring)

12 – 20 A / DM2 (stirring)

Voltage 10 – 15 V

Polishing time 3 – 5 minutes

Cathode material lead or stainless steel

Cathode area: anode area 2 – 3:1

Basic introduction of drilling and tapping machine

Drilling and tapping center is a kind of metal cutting equipment. Its style and function are basically similar to machining center, but it is smaller than machining center. Generally, the stroke is no more than (x / y) 800 × 400mm. It is mainly used for drilling and tapping of nonferrous metals, 3C industry, aluminum substrate, etc. Although it can realize boring and milling, due to the low power of main motor, it can’t carry out heavy tapping of ferrous metals Cutting, but the efficiency and quality of drilling and tapping speed is more than 10 times of that of ordinary machining center. For 3C, communication industry and other industrial customers, it is the most ideal processing equipment.

Current overall market analysis:

Due to the rise of mobile phone industry, communication industry and tablet computer industry in recent years and the continuous upgrading to please consumers, the accompanying supporting processing industry is also rising, especially the demand for drilling machine is growing.

In the early stage of drilling and tapping center, the water-based cutting fluid (water-based) was used in the separate cooling water tank, and both stations were used. However, after a period of time, it was found that the water-based cutting fluid of drilling and tapping center was not good for drilling and tapping threads, especially for taps, which were “astringent” during machining and were very easy to break, and the quality of the tapped holes was not good. Therefore, we changed the drilling center to dry machining. When we arrived at the tapping station, kerosene was used for lubrication (kerosene was supplied by the pump alone, and the electrical control) to produce good thread quality, and the tap was rarely broken. The processing form of drilling and tapping Center: manually push the material to the conveying position, press the “swing up” button to enter the automatic cycle, and the two headstocks act at the same time. After the second feeding, the two headstocks return to the original position.

CNC machine tool is a widely used drilling and tapping center. CNC machine tool is a kind of advanced equipment with excellent performance, wide range of technology, high precision of drilling and tapping center and high production efficiency. One time clamping can complete drilling, reaming, boring, grooving and plane milling. In addition, it can also process holes with high precision. CNC machining is used for heavy machinery, engineering machinery, rolling stock, mining equipment, large motor and water turbine , steam turbine, shipbuilding, steel, military and other industrial sectors essential processing equipment. The CNC machine tool has the characteristics of good rigidity, high precision, strong reliability, convenient operation, beautiful appearance, etc., especially in the end face of square ram, it can also install various accessories or cooperate with the rotary table, which can further expand the application scope of CNC machine tool. CNC machine tools are mainly used for boring large and medium-sized parts of the hole, but also can complete drilling, expanding, reaming, milling plane and other work. The CNC machine tool is equipped with a change gear device, which can process metric or English internal thread. The end face can be turned by using the flat disc radial tool rest, which can be used online with the rotary table, and the inner hole and outer circle with large diameter and short length can be processed.

How to achieve control balance in CNC machining

CNC (numerical control machine tool) is the abbreviation of computer numerical control machine tool, which is a kind of automatic machine tool controlled by program. The control system can logically process the programs with control codes or other symbolic instructions, and decode them by computer. Thus, the machine tool can perform the specified action, and the blank can be processed into semi-finished parts by cutting tools.

The computer gong machining center is a highly mechatronic product. After the workpiece is clamped, the CNC system can control the machine tool to automatically select, change the tool, set the tool, change the spindle speed and feed rate according to different processes. It can continuously complete drilling, boring, milling, reaming, tapping and other processes, thus greatly reducing the workpiece clamping time, measuring and machine tool adjustment and other auxiliary processes It has good economic effect for the parts with complex machining shape, high precision and frequent variety replacement.

CNC milling machine is developed on the basis of general milling machine. The processing technology and structure of the two machines are basically the same. However, CNC milling machine is an automatic processing machine controlled by program, so its structure is very different from that of ordinary milling machine. Considering the limitation of traditional reliability method, the superiority evaluation principle of extension engineering method is applied, This paper defines and calculates the influence degree and influence factor of each subsystem and its failure mode of machining center on the reliability of machining center. Combined with the failure example of a machining center, the detailed calculation is carried out under the condition of comprehensively considering all failure factors, and the reliability improvement measures are put forward.

It is correct that not all tools need to be balanced, especially when the process results in increased costs and additional steps. Whether to balance the cutting tools depends on the specific situation. At high speed, the balance effect is the most prominent, but at any speed, the balance tool produces better shape and position accuracy, improves surface finish and prolongs tool life.

How to improve wear resistance in parts processing

Avoid sliding friction pairs made of the same materials

Avoid too large thickness of white alloy

Avoid increasing the requirements for the whole part in order to improve the wear resistance of the part surface
Avoid local wear of large parts and scrap the whole parts
When white alloy is used as bearing liner, attention should be paid to the selection of bearing material and the design of bearing structure
The lubricant supply is sufficient, covering the working face
The lubricating oil tank should not be too small
Do not let the filter filter out the additive in the lubricant
The size, position and shape of oil groove of sliding bearing shall be reasonable
The amount of grease added into the rolling bearing should not be too much
Add a certain amount of wear allowance to the easily worn surface of parts
Pay attention to the adjustment of worn parts
The velocity and pressure difference between different points on the same contact surface should be small
Adopt dust-proof device to prevent abrasive wear
Avoid step wear
Contact oil seal cannot be used for sliding bearing
The easily worn parts shall be protected
For easily worn parts, the structure of automatic wear compensation can be adopted
Avoid the distance between the force point and the support point
Avoid cantilever structure or reduce cantilever length
Don’t ignore the beneficial effect of working load
Avoid using friction to transfer force for parts under vibration load
Avoid the unbalanced force in the mechanism
Avoid considering only one way of force transmission
High speed computer gong processing should not ignore the influence of part deformation on stress distribution during working
Avoid large tensile stress on iron castings
Avoid bending stress on thin rod
Avoid excessive rigidity of parts under impact load
Avoid rough surface or scratch of parts under variable stress
Residual tensile stress should be avoided on the surface of parts under variable stress
The stress concentration of parts under variable load should be avoided or reduced
Avoid that the local structures that affect the strength are too close to each other
Avoid pre deformation in machining of mechanical parts, and the deformation direction is the same as that produced by working load
The diameter of pulley and drum of wire rope shall not be too small
Avoid too many times of wire rope bending, and pay special attention to avoid repeated bending during machining of mechanical parts
Allowance shall be left at the joint of wire rope and drum during lifting
The intermediate parts of CNC machining center that can not transfer force should be avoided as far as possible
Try to avoid additional force caused by misalignment of axis during installation
Minimize the force acting on the foundation.

Computer gong processing – high strength steel

When the material is formed by stamping, it hardens. The hardening degree of different steels is different. Generally, the increase of 3 Ksi of high strength low alloy steel is less than 10%. Note: the yield strength of dual phase steel increases by more than 40% by 20ksi! During the forming process, the metal will become completely different, completely unlike before the stamping process begins. The yield strength of these steels increases a lot after being stressed. The higher yield stress and work hardening of the materials processed by CNC lathe are equal to the great increase of flow stress. —-This results in the need for more tonnage to make parts – it increases the deformation temperature of the metal (which may burn or destroy improper lubricants), hard spots increase die wear – and the coating may not help or last as long as expected.

In the past, in the production of deep drawing or re punching parts, everyone thought that pressure resistant (EP) lubricating oil was the best choice to protect the mold. Sulfur and chlorine EP additives have been mixed into pure oil to improve mold life for a long time. However, with the emergence of new metal high strength steel and strict environmental protection requirements, the value of EP oil-based lubricating oil has decreased or even lost its market.

The development trend of modern CNC lathe precision machining is high speed, high precision, high reliability, multi-function, compound, intelligent and open structure. The main development trend is to research and develop intelligent full-function universal CNC device with open structure in both software and hardware. CNC technology is the foundation of machining automation and the core technology of CNC machine tools. Its level is related to the national strategic position and the level of national comprehensive strength. It develops with the development of information technology, microelectronics technology, automation technology and detection technology. CNC lathe precision machining is a kind of CNC machine tool with tool library and automatic tool change, which can carry out a variety of processing operations on the workpiece in a certain range.

CNC lathe precision machining is the use of CNC technology to control machining machine tools, or equipped with CNC system. The use of CNC machine tools to process mechanical parts, known as CNC machining. NC machining is different from ordinary machine tools. CNC machining needs control information, such as tool feeding, the sequence of various actions, and various auxiliary functions (such as soil shaft speed, speed, tool change, coolant switch, etc.), etc. the program is stored in the control in digital form, and the automatic machining machine tool is realized through digital control device.

CNC lathe precision machining is an efficient automation tool, is a typical electromechanical products, it can achieve high-speed processing, high precision, high degree of automation. Mechanical parts processing is an important difference from other types of automatic machine tools: CNC machine tools use flexible automation technology, that is, when the processing object changes, in addition to clamping parts and replacement tools, only need to change the processing program can automatically find out new parts, without changing other hardware equipment.

The precision of computer gong forming

How to control the accuracy of mechanical parts in the process of aluminum oxidation treatment? If there is a precision request for the thickness process dimension of fine mechanical parts, the process size or negative difference dimension of the machined parts can be increased according to the accurate size after oxidation treatment, so as to ensure that the fine and dense machined parts meet the process requirements on the drawing after the oxygenation treatment. In the machining process of mechanical parts, not only the paper size thickness has precision, but also the size request of fine hole, step, hole to edge, etc., which is the same as the processing method of thickness request.

Aluminum oxidation has an impact on the accuracy of mechanical parts, but it can be controlled in the machining process of mechanical parts, which can ensure and meet the process requirements on customer drawings!

The content of mold precision includes four aspects: dimensional accuracy, shape accuracy, position accuracy and appearance accuracy. Because of the working time of the mold, the upper and lower die position accuracy is the most important among the four kinds of precision.

Mold precision is to serve the accuracy of products, high-precision products must be guaranteed by higher precision molds, mold accuracy generally must be higher than the product accuracy of 2 or more levels.

Methods of improving die precision

1。 The precision guarantee of mould processing equipment

2。 Precision requirements of parts in mould manufacturing

①。 Die material accuracy requirements

The processing tolerance of die steel should be controlled within 300×300 + 0.005-0 ± 0.005300×500 + 0.01-0 ± 0.01500×800 + 0.01-0.01 ± 0.015800×1200 + 0.02-0.02 ± 0.02. Precision requirements of mould parts

a。 The precision of Sumi series is within 0020.002mm, and the precision of guide sleeve can be controlled.

b。 The edge forming punch is made of Misumi standard material: SKD-11, hardness: 60-62hrc, and the edge shape is: dregth, which is usually used to form the inner hole or cylinder shape of products. The precision of punching needle can be controlled within ± 0.01mm, and it can be about 2um for special requirements, and keep mirror like.

3。 The size of die gap is the main basis of die design and manufacturing accuracy. In order to ensure the accuracy of product size and shape position, as well as the product quality (such as the cross-section quality and burr height), the gap between the concave and convex dies must be ensured.

4。 The requirements of die construction precision are as follows. Luo Baihui said that from the perspective of processing and assembly, the accuracy of mold base mainly includes the following aspects:

a。 The size and position of the upper and lower plane of the template are consistent;

b。 Flatness and parallelism of large plane of formwork;

c。 Perpendicularity of guide hole to large plane;

d。 Perpendicularity between adjacent sides of formwork;

e。 The fitting accuracy between guide pillar and guide sleeve.

The main methods to ensure the accuracy of mold base are as follows:

a。 The one-time processing method is that after the large plane processing of the template is completed, the upper and lower templates are clamped together, and the plane dimensions and guide holes of two templates are processed at one time.

b。 One of the four guide holes is deviated from the symmetrical position to ensure the assembly orientation of the die.

c。 Datum is used to calibrate the table.

d。 Guide pillar and guide sleeve with high matching precision are adopted.

e。 Improve the machining accuracy of parts.

②。 From the perspective of machining and assembly, the accuracy of punch mainly includes:

a。 The shape and size accuracy of punch;

b。 Perpendicularity between adjacent sides of punch.

③。 From the perspective of processing and assembly, the accuracy of female die mainly includes:

a。 The accuracy of shape and dimension of female die;

b。 Perpendicularity between adjacent sides of die;

c。 Perpendicularity of die side to large plane;

d。 Position degree of die.

5。 The precision of forming process ensures that in the process of forming structure, the coordinate processing method is adopted whether it is processed by computer gong, EDM, WEDM or ordinary milling machine. The guarantee of the accuracy mainly depends on the accuracy of the machine tool and the accuracy of the operator’s calibration table and score. It is considered that the concept of die precision should also run through the whole process of mold design and manufacturing, just as the guiding principle and guiding ideology of establishing enterprise product quality assurance and management system.

Computer gong processing – product processing center

Product processing center refers to the processing center used to process products. There are large products and small products here. However, large machine tools are usually used to process molds, and there are a small number of products. Product processing center is the most widely used in the field of CNC machining center, because there are more products than molds. The products of many industries need to be processed by vertical machining center.

The main functions of the equipment are as follows:

Milling, CNC milling machine generally should have three coordinate linkage function, which can carry out linear interpolation and arc interpolation, and automatically control the rotation of the milling cutter relative to the workpiece movement for milling.
Drilling, reaming, reaming, countersinking, boring, etc. can be carried out by using fixed size hole processing tools, or milling cutter can be used to mill holes of different sizes;
Tool compensation function, generally including tool radius compensation function and tool length compensation function.
For the conversion of metric and English units, metric units (mm) and English units (inch) can be selected for programming according to the marking of drawings, so as to adapt to the specific situation of different enterprises.
Absolute coordinate and incremental coordinate programming, the coordinate data in the program can be absolute coordinates or incremental coordinates, so that the data can be calculated or between 20%. The programming is more convenient.
Adjustment of feed speed and spindle speed. The control panel of CNC milling machine is generally equipped with multiple switch of feed speed and spindle speed, which is used to adjust the actual feed speed and actual spindle speed at any time according to the processing status and program setting value during program execution, so as to achieve the best cutting effect. Generally, the feed speed adjustment range is between 0% ~ 150%, and the spindle speed adjustment range is 50% ~ 1.

This machining center is the commonly used equipment in CNC industry. The CNC equipment is composed of mechanical equipment and CNC system. It is an efficient automatic CNC machine tool used to process complex shaped workpieces. This equipment is originally developed from the CNC milling machine, but also in the later application process in the technical aspects of change. Moreover, this equipment is also a highly mechatronic product. After the workpiece is clamped, the CNC system can control the machine tool to automatically select according to different working procedures. In addition, it can automatically change the cutting tool and automatically change the spindle speed and feed rate. In addition, the equipment can also continuously complete drilling and boring Milling, reaming, tapping and other processes, which can greatly reduce the clamping time of the workpiece, as well as the auxiliary process time such as measurement and machine tool adjustment, and the more complex processing shape and higher accuracy requirements in application, as well as good experience in parts with frequent variety change Moreover, the current application equipment can gradually become the most important equipment in the mechanical processing industry,

The supporting parts of machining center mainly refer to machine bed, upright, beam, base and other large parts. Its function is to support parts, bear force and ensure their mutual position. Although the shape, geometric size and material of the support are various, they all satisfy the following points.

The anti vibration property of the supporting part refers to its ability to resist forced vibration and self-excited vibration. Vibration will not only make the machine produce noise, but also affect the processing quality. Therefore, the support should have sufficient vibration resistance and have the required dynamic characteristics. The main factors affecting the vibration resistance of the support are: the stiffness of the support, the natural frequency of the support, the damping of the support, the support condition of the support and the material of the support, etc. in practice, the vibration resistance of the support is often improved by selecting the high damping material, adopting the high damping component, and improving the support condition of the support with the Linjia vibration damping pad.
Stiffness requirements the stiffness of the supporting part refers to the ability of the support to resist deformation under the action of constant load and alternating load. The former is called static stiffness and the latter is dynamic stiffness. The static stiffness depends on the structural stiffness and contact stiffness of the supporting timber body. The dynamic stiffness is not only related to the static stiffness, but also to the damping and natural frequency of the supporting system. The most important factors affecting the stiffness of the support are the material and structure of the support. The stiffness of the support can be improved by using high rigid materials and increasing the elastic modulus of the material; the contact stiffness can be effectively improved by increasing the surface contact area, increasing the preload and improving the surface quality; It is an effective measure to improve the stiffness of supporting parts by adopting reasonable cross-section shape and configuring the stiffeners and stiffeners.
The main factors affecting the thermal deformation of the supporting parts of machining center are: the structure of the support, the heating of the moving parts and the external heat source. The thermal deformation can be reduced by adopting the thermal symmetry structure, isolating the heat source, forced cooling and quick chip removal

Five skills of CNC engraving machine

As we all know, engraving skill is an art that has been spread since ancient times, but with the rapid growth of economy in China, it is no longer only relying on hand to complete.

Next into the world of CNC engraving machine.

Skill 1:

The main shaft of CNC engraving machine, as a focus part, is mainly due to rust and blockage, which will cause the machine can not operate normally. The reason is that when we are in bad luck, the coolant in the coolant pipe is still left in it. In addition, the water also contains a large amount of elements. After high temperature, heavy water will gradually form. Heavy water contains a lot of impurities and precipitates After coming down, it will form dirt and form rust and blockage.

Therefore, the surface of motorized spindle should be coated with antirust oil and the cooling water should be changed regularly. And to prevent water temperature too high, but also to ensure the cleanliness of cooling water, if allowed, in case of spindle blockage.

Skill 2:

If the cooling system of the engraving machine is not grounded, the success rate will drop, the cold water head will fall off, and the service life will be greatly reduced. If the environment is severe, even the equipment deployment can not start things.

Skill 3:

If the fans and air ducts are not cleaned up, many smoke and dust inside will not be discharged. At this time, the lenses and laser tubes will also be seriously polluted. Finally, they will oxidize the electronic parts of the machine and cause the war is not good. This is why the response of engraving time is slow.

Skill 4:

Focus mirrors and mirrors should also be checked regularly. Because its frame is easy to heat, if not real-time disposal punishment, will make the appearance of oxidation, a long time will rust. Especially is the use of air pump and air compressor users, but also to regularly check the lens, so as not to cause irreparable place display.

Skill 5:

In order to make the engraving machine connected to the best state, to make its power cooling connection smooth, but also fair, the current should be connected within 50%, otherwise, it will cause the effect of increasing the rate of obstruction.

The most prominent feature of professional CNC carving machine is: professional carving CAD / CAM software and CNC carving machine for professional and strict matching!

When a professional computer (CNC) engraving machine is used for batch processing, the professional engraving software can ensure that the operator can make a plan smoothly and generate a reasonable and efficient processing program; when the data is loaded and the tool is adjusted and started to work, the operator only needs to listen to the cutting sound of the cutter on time to determine whether the tool is worn or not, and to replace the cutter when necessary, which is not necessary When the processing is completed, if it is found that the processing in some areas does not meet the requirements, the operator can use the repair function on the machine to make up for it on site, and a batch of work is completed so fluently. It’s easy to work like this!

The main performance is: tool adjustment is difficult to accurately locate and difficult to repair the deficiencies in the processing! This may be formed: low positioning accuracy of cutting tool affects the accuracy of products, and it is necessary to repeat processing to reduce processing power!

Taking professional carving CAD / CAM software as planning channel — the central computer (CNC) for efficient carving with small cutting tools usually carves out precise and disordered shapes. Its appearance and processing method are different from traditional CNC machining methods. If there is no professional carving CAD / CAM function as support, it is difficult to achieve high efficiency in practical application

Using precision high speed spindle motor

High speed and precision spindle motor features high speed, high precision, low noise, low vibration and high-speed constant power, which ensure that the small tool can obtain high cutting line speed, adhere to high rotation accuracy and stable working shaft system, and can produce satisfied high-speed cutting force.

CNC carving skills based on equal cutting skills

Equal cutting is a cam professional skill for high-speed carving of small tools. No matter how messy the processing area is, this skill can ensure the generation of a stable cutting amount and plan a reasonable carving way. Only the equal cutting method can ensure the efficient carving of small tools in terms of skills.

Safe and stable CNC control skills — the fundamental guarantee of efficient carving of small tools

CNC carving using small cutting tools, single cutting data removal is small, in order to improve the processing power, it is necessary to improve the average speed of feed, and can safely and quickly back. The safe and stable CNC control skills of the fine carving CNC system ensure that the small tool can receive stable cutting force and maintain a high and stable average feed speed in carving, so that the high power of small tool machining can be completed.

Stable mechanical structure — a solid channel for high speed carving with small cutting tools

The mechanical structure of the engraving machine is composed of all castings, and the moving guide rail is directly installed on the stable structure. Under the guarantee of high-precision machining parts and precise installation skills, it can ensure that the fine carving machine has good movement stability, low motion noise, provides a stable operation channel for high-speed machining of small cutting tools, and provides the completion of the motion method of “high-speed feed and quick return” A solid guarantee.

Useful function of repairing unexpected condition — to ensure that the machining of small tools is true and efficient

Because CNC engraving uses small tools to process, the unexpected situation that small tools wear quickly and break easily can not be completely changed. Therefore, the computer engraving machine is required to have a useful function of repairing unexpected conditions. The operator can repair the carving errors directly in the operation channel. Otherwise, once an accident occurs, it needs to be reprogrammed or processed from scratch, which will result in a lot of meaningless repetitive work The processing power is reduced.