2020 – Page 3 – CNC Machining & Turning, Milling, Metal parts

Selection of processing materials for computer gongs

CNC precision machining engineers summarize their experience in actual machining, mainly including the following situations:

The tubular material will bend and deform when it is cut open;
When the center of the part is hollowed by WEDM, the stress and deformation will occur;
POM deforms due to excessive cutting amount or high processing temperature;
Customized materials have not been properly and scientifically aged;
Other complex parts in the process of processing due to improper process settings resulting in subsequent processing deformation;

In order to avoid the deformation caused by the above conditions in the processing, thus affecting the precision of the workpiece, the technical personnel put forward the following countermeasures:

Appropriate and scientific aging treatment should be carried out for customized materials and hollow materials;
The stress effect of each process should be considered in the processing of complex structural parts,

Set up scientific and reasonable process flow;

In the processing of POM and PVC materials, it is necessary to consider the particularity of materials, set appropriate machining allowance, and adopt the principle of “a small number of times” for processing and measuring;
The processing of curved surface needs to design and make good fixture,

Balance the clamping force on the workpiece;

CNC machining center structure can be divided into two parts: host part and control part! The host part includes the body, headstock, worktable, base, column, beam, feed mechanism, tool magazine, tool changer, auxiliary system, etc

The structure of CNC machining center is as follows

CNC machining center structure can be divided into two parts: host part and control part!

The host part includes the body, headstock, worktable, base, column, beam, feed mechanism, tool magazine, tool changer, auxiliary system, etc. the control part includes hardware part and software part

The hardware part includes: computer digital control device (CNC), programmable logic controller (PLC) input and output equipment, spindle drive device, display device, etc.

Software part includes: system program and control program two parts!

The purpose of the automatic tool changer is to meet the processing requirements,

The tool installed on the spindle is automatically replaced. The automatic tool changer is a set of independent and complete parts.

The tool changing process of the automatic tool changing device consists of two parts: tool selection and tool change!

Tool selection means that the tool magazine will automatically move the tool to be used to the tool change position according to the tool selection instruction. Tool change is to take down the used tool on the spindle and install the selected tool on the spindle!

Knowledge of using computer gongs

CNC computer gongs usually use vacuum chuck because the workpiece has high requirements for surface smoothness, or when the fixture of CNC computer gong itself cannot clamp the workpiece well, it is a relatively cheap special fixture in CNC machine tools.

Vacuum chuck used on CNC computer gongs: the vacuum chuck plays the role of fixture in CNC machining center. Some workpieces require high surface smoothness, so they can not use the fixture of common CNC computer gongs. At this time, the vacuum sucker can be put into use. However, we seldom use rubber vacuum cups in CNC computer gongs, but we use CNC vacuum cups more. The so-called CNC vacuum sucker is a kind of special vacuum sucker with vacuum generator and switch. The suction principle is the same as rubber vacuum chuck, which creates a vacuum environment to make the suction cup press on the workpiece under atmospheric pressure, but CNC vacuum chuck is the only one The vacuum environment is produced by the vacuum generator. The rubber vacuum chuck is a simple vacuum component, while the CNC vacuum sucker is like a large plate.

The computer gong machining of CNC machine tools is mainly used to process parts with complex shapes, but the structure of the fixtures used is often not complicated. The selection of fixture for CNC milling machine can be firstly determined according to the batch of production parts. For the single piece, small batch and heavy workload mold processing, the positioning and clamping can be realized directly on the machine table by adjusting, and then the position of the parts can be determined by setting the machining coordinate system.

What is CNC computer gong vacuum sucker: vacuum sucker, also known as vacuum spreader, is one of vacuum equipment actuators. Generally speaking, it is the cheapest way to grab the product with vacuum sucker. There are various types of vacuum suction cups. Rubber suction cups can be operated at high temperature. The suction cups made of silicone rubber are very suitable for grasping products with rough surface, while those made of polyurethane are very durable. In addition, in the actual production, if the sucker is required to have oil resistance, polyurethane, nitrile rubber or polymer containing vinyl can be used to make sucker. Generally, in order to avoid scratches on the surface of the products, it is better to choose the suction cup with bellows made of nitrile rubber or silicone rubber. The material of suction cup is made of nitrile rubber, which has large breaking force, so it is widely used in various vacuum holding equipment.

Machining is a process of changing the overall dimension or performance of the workpiece with processing machinery. According to the temperature state of the workpiece to be processed, it can be divided into cold working and hot working. Generally, it is processed at normal temperature and does not cause chemical or physical changes of the workpiece, which is called cold working. Generally, the processing above or below the normal temperature will cause the chemical or physical phase changes of the workpiece, which is called thermal processing. Cold working can be divided into cutting and pressure machining according to the difference of processing methods. Heat treatment, forging, casting and welding are common in hot working.

The machines needed for machining include digital display milling machine, digital display molding grinder, digital display lathe, EDM machine, universal grinder, machining center, laser welding, middle wire feeding, etc., which can be used for turning, milling, planing and grinding of precision parts. Such machines are good at turning, milling, planing and grinding of precision parts, and can process various irregular shape parts with the machining accuracy of 2 μ M

In addition, cold and heat treatment is often used in assembly. For example, during the assembly of bearing, the inner ring is often cooled in liquid nitrogen to shrink its size, the outer ring is heated properly to enlarge its size, and then it is assembled together. The outer ring of the wheel of the train is also sheathed on the substrate by heating, and the bonding firmness can be ensured when it is cooled (this method is still applied to the transfer process of some parts).

Mechanical processing includes: filament power winding, laser cutting, heavy processing, metal bonding, metal drawing, plasma cutting, precision welding, roll forming, sheet metal bending, die forging, water jet cutting, precision welding, etc.

Computer gong processing – machine failure

Fault analysis is the first step of machine tool maintenance. Through fault analysis, on the one hand, it can quickly find out the cause of the fault and eliminate the fault; at the same time, it can also play a role in preventing the occurrence and expansion of the fault. Generally speaking, the main methods of machine tool fault analysis are as follows:

Conventional analysis method conventional analysis method is a method of routine inspection on the mechanical, electrical, hydraulic and other parts of the machine tool, so as to determine the cause of the failure. On machine tools, conventional analytical methods usually include the following contents:

1) Check whether the specifications of power supply (including voltage, frequency, phase sequence, capacity, etc.) meet the requirements

2) Check whether the connection of CNC servo drive, spindle drive, motor and input / output signal is correct and reliable

3) Check whether the printed circuit board in CNC servo drive device is firmly installed and whether the connection part is loose

4) Check whether the setting end and potentiometer of CNC servo drive and spindle drive are correct

5) Check whether the oil pressure and air pressure of the hydraulic, pneumatic and lubricating parts meet the requirements of the machine tool

6) Check the electrical components and mechanical components for obvious damage, etc

The action analysis method is a method to determine the bad action position by observing and monitoring the actual action of the machine tool and trace the root cause of the fault. Generally speaking, the hydraulic and pneumatic control parts of the machine tool, such as: automatic tool change device, exchange table device, fixture and transmission device, can be determined by action diagnosis.

State analysis method state analysis method is a method to determine the cause of failure by monitoring the working state of the actuator. This method is most widely used in the process of machine tool maintenance. In modern CNC system, the main parameters of servo feed system, spindle drive system and power module can be tested dynamically and statically. These parameters include: input / output voltage, input / output current, given / actual speed, position, actual load condition, etc. In addition, the status of all input / output signals of CNC system, including internal relays and timers, can also be checked by the diagnostic parameters of CNC system. Through the state analysis method, the cause of failure can be quickly found out according to the internal state of the system without instruments and equipment. It is widely used in the process of machine tool maintenance, and the maintenance personnel must master it skillfully.

Operation and programming analysis method operation and programming analysis method is a method to confirm the fault cause through some special operation or compiling special test program section. For example, through manual single step to execute automatic tool change, automatic table exchange action, execute single function processing instructions and other methods to detect the action and function. By this method, the cause and components of the fault can be determined and the correctness of the program can be checked.

Self diagnosis of CNC system is a self diagnosis and testing method for the key hardware and control software of the system by using the internal self diagnosis program or special diagnosis software. It mainly includes boot self diagnosis, online monitoring and offline testing. Adjustment of machine tool accuracy and function,

Using precision level instrument and other detection tools, mainly by adjusting the pad iron way to fine adjust the level of the main bed of the computer gong processing machine tool, so that the geometric accuracy of the machine tool can reach the allowable tolerance range;
For the automatic tool change device, adjust the position of the tool magazine, manipulator, travel parameters, etc., and then check the action with the command, which is required to be accurate;
For the machine tool with APC automatic exchange table, after adjusting the relative position, carry out automatic load exchange;
After the adjustment of the machine tool, carefully check whether the parameter setting values in the numerical control system and the programmable controller conform to the data specified in the random index, and then test the main operation functions, safety measures, execution of common instructions, etc.

Computer gong processing – sheet metal

Purpose of sheet metal:

There are a lot of sheet metal materials suitable for stamping. Sheet metal materials widely used in electronic and electrical industry include:

⒈ the common cold-rolled plate SPCC refers to the continuous rolling of steel ingot into the required thickness of steel coil or sheet. SPCC surface without any protection, exposed to the air is very easy to be oxidized, especially in humid environment, oxidation speed is accelerated, dark red rust appears, the surface should be painted, electroplated or other protection.

The base material of SECC SECC galvanized steel sheet is a common cold-rolled steel coil. After degreasing, pickling, electroplating and various post-treatment processes in the continuous electro galvanizing production line, it becomes the electro galvanized product. SECC not only has the mechanical properties and approximate processability of general cold-rolled steel sheet, but also has superior corrosion resistance and decorative appearance. In the market of electronic products, home appliances and furniture, it is very competitive and replaceable. For example, SECC is widely used in computer cases.
Hot dip galvanized steel sheet SGCC hot-dip galvanized steel coil refers to the semi-finished products after hot-rolled pickling or cold-rolled, which are cleaned and annealed, immersed in the solution zinc bath at about 460 ° C, and the steel sheet is coated with zinc layer, and then quenched, tempered, leveled and chemically treated. SGCC material is harder than SECC material, with poor ductility (avoiding deep drawing design), thicker zinc layer and poor weldability.
The content of Cr (CR) in SUS301 is lower than that in SUS304, and its corrosion resistance is poor. However, after cold working, it can obtain good tensile strength and hardness, and has good elasticity. It is mostly used in spring spring and anti EMI.
Stainless steel SUS304 is one of the most widely used stainless steels. Because it contains Ni (nickel), it is more corrosion-resistant and heat-resistant than the steel containing Cr (CR). It has very good mechanical properties, no heat treatment hardening phenomenon and no elasticity.

2、 Features of sheet metal:

Sheet metal, B ǎ N J ī n (metal plate; Sheet metal in English) has not yet had a relatively complete definition. According to a definition in a foreign professional journal, it can be defined as: sheet metal is a comprehensive cold working process for sheet metal (usually less than 6 mm), including shearing, punching / cutting / compounding, folding, welding, riveting, splicing, forming (such as automobile body), etc. Its remarkable feature is that the thickness of the same part is the same.

Sheet metal has the characteristics of light weight, high strength, conductive (can be used for electromagnetic shielding), low cost, good mass production performance and so on. It has been widely used in the fields of electronic appliances, communication, automobile industry, medical equipment, etc., for example, in computer case, mobile phone, MP3, sheet metal is an essential part. With the application of sheet metal more and more widely, the design of sheet metal has become a very important part in the process of product development. Mechanical engineers must master the design skills of sheet metal parts, so that the designed sheet metal can not only meet the requirements of product function and appearance, but also make the stamping die manufacturing simple and low cost.

Sheet metal processing is the key technology that sheet metal technical staff need to grasp, and it is also an important process of sheet metal forming. Sheet metal processing includes the traditional cutting and blanking, blanking processing, bending and pressing forming and other methods and process parameters, as well as various cold stamping die structures and process parameters, various equipment working principles and operation methods, as well as new stamping technology and new technology. Parts sheet metal processing is called sheet metal processing.

What should we pay attention to when we look at the sheet metal processing plant.

The unfolded drawing of sheet metal processing plant is based on the part drawing

If there are mistakes (similar and asymmetric), it should be highlighted
Reasonable selection of clearance and hemming methods: clearance 0.3 below T = 2.0, 0.5 clearance between T = 2-3, and long edge wrapping with short edge (door panel)
The deployment method should be suitable, convenient, material saving and processability
Burr direction
Draw the sectional view according to the position and direction of tooth extraction, riveting, tearing and bumping
Check the material, plate thickness and plate thickness tolerance
The place to be protected by spraying must be indicated
Enlarge the drawing where the size is large
For special angle, the inner radius of bending angle (generally r = 0.6) should be tested and unfolded
Reasonable consideration of tolerance dimensions: negative difference goes to the end

CNC lathe processing

CNC machining classifies robots according to the motion track of CNC lathe

(1) Point control CNC lathe processing robot. The CNC lathe robot of CNC equipment can only control the moving parts of the lathe from one position to another accurately, that is to say, only the value of controlling the end point of coordinate travel does not have any reduction in the moving process, as for the speed and path between the relevant two points depends on the productivity.

In order to locate accurately on the basis of as high productivity as possible, the movement between the two related points is first to move quickly to the new position, and then slow down the 1-3 stage, let it slowly locate the point, so as to ensure its positioning accuracy.

(2) Point line control CNC lathe processing robot. This kind of NC lathe robot processing, not only to control the position between the two related points, but also to control the movement speed and route between the two related points.

Its route usually consists of straight lines parallel to each axis. The difference between the control and the point of NC lathe robot is that when the moving parts of the machine tool move, it can be processed along an axis direction (generally it can be cut at 45 ° oblique line, but not any slope linear cutting). The auxiliary function is the position control of the NC lathe robot, such as improving the spindle speed control, feed processing cycle, tool selection, and other functions.

(3) Contour control CNC lathe processing robot. The control device of this kind of CNC lathe can control two or more coordinate axes continuously at the same time.

In the process of machining, we should not only control the starting point and the end point, but also control the speed and position of each point in the whole processing process, so that the CNC lathe robot can process complex shaped parts according to the drawing requirements. Its auxiliary functions are also relatively complete.

CNC machining is classified according to CNC device

(1) Hard wire CNC lathe robot processing (commonly known as ordinary CNC, namely NC). The input, interpolation and control functions of the system are realized by integrated circuits or discrete components.

Generally speaking, the CNC system is not flexible, so it is composed of different hardware functions. This system was widely used before the 1970s.

(2) Flexible wire CNC lathe robot processing (also known as computer numerical control or computer numerical control, namely CNC or MNC). This system uses medium, large-scale and super large-scale integrated circuits to form numerical control equipment, or uses microcomputer and special integrated chips. Its main numerical control functions are almost completely realized by software. For different CNC lathe robots, it only needs to compile different software implementation, and hardware is almost universal.

So it has flexibility and adaptability, and it is easy to produce in batch. The quality and reliability of the system are improved by modularization of software and hardware. Therefore, the modern CNC lathe robot all uses the numerical control device.

CNC machining is classified according to the process use

(1) General CNC lathe robot processing. Compared with the traditional lathe processing, this kind of NC lathe robot processing has CNC turning, milling, boring, drilling, grinder and other mechanical processing methods. The possibility of this kind of CNC lathe robot processing technology is similar to that of ordinary machine tools, but it can process complex parts.

(2) CNC lathe robot processing. This kind of NC lathe robot processing is developed on the basis of ordinary NC lathe robot processing.

In the general CNC lathe robot is equipped with a tool library (can accommodate 10-100), the equipment composed of cutting tools and automatic tool equipment uses automatic tools to change the CNC lathe robot (also known as multi-step or boring and milling machining center, CNC lathe robot is usually called machining center), and the development direction of NC lathe robot processing is further automation and efficiency.

(3) Multi coordinate CNC lathe robot processing. Some complex shape parts can not be processed by three-dimensional CNC lathe, such as propeller, aircraft surface parts processing, need more than three-dimensional comprehensive movement to process the required shape.

Then the multi coordinate CNC lathe robot is used to process the robot. Its characteristics are that the number of control axes of CNC equipment is more, and the structure of lathe is also more complex. The number of coordinate axes usually depends on the processing technology requirements of the parts to be processed.

CNC computer gong programming and processing

Advantages: 1. High reliability

The reliability of large-scale mechanical parts processing equipment is guaranteed by using highly integrated electronic components, chips and VLSI.

Many functions are realized by software, which reduces the number of hardware.

Rich fault diagnosis and protection functions (mostly realized by software) can reduce the frequency of system failure and the repair time after failure.

Easy to use and maintain

Easy to operate and use: Dongguan computer gong processing users only need to follow the menu prompts, you can operate correctly.

Easy to program: with a variety of programming functions, automatic program verification and simulation functions.

Convenient maintenance and repair: some routine maintenance work is carried out automatically (lubrication, regular inspection of key components, etc.), and the self diagnosis function of CNC machine tool can quickly realize accurate fault location.

Easy to realize mechatronics

Numerical control system control cabinet small size mold processing (using computer, the number of hardware is reduced; the integration of electronic components is higher and higher, and the hardware is constantly reducing), which makes it possible to combine it with machine tool in physics, reduce the floor area and facilitate operation.

Flexibility and versatility

Most of the functions of mechanical parts processing device are realized by software. The modular structure of software and hardware makes the modification and expansion of system functions more flexible.

The basic configuration of mechanical parts processing device is universal. Different CNC machine tools only configure corresponding specific function modules to achieve specific control functions.

Rich CNC functions

Interpolation function: quadratic curve, spline, spatial surface interpolation

Compensation function: motion precision compensation, random error compensation, nonlinear error compensation, etc

Man machine dialogue function: dynamic and static tracking display of processing, advanced man-machine dialogue window

Programming function: G code, basket chart programming, partial automatic programming function.

CNC computer gong processing batch parts

Automatic tool setting system can be used for precision CNC machining. The tool is loaded up one time and one button is used. The machine tool can automatically adjust the tool and process directly. The error is within 0.001 ~ 0.0003 mm, which is not much slower than the automatic change time. If it is a machining center, the efficiency of the machine tool without automatic tool setting device is much higher than that of the machine tool without tool magazine but with automatic tool setting device.

For the domestic manufacturing industry, especially for mold manufacturing enterprises, it is generally single piece production, and labor resources are sufficient. Therefore, for the processing of small batch industrial parts, we should fully consider the use value of funds, and do not use machining center equipment. What’s more, there are still many problems in the tool magazine of domestic manufacturers.

The precision CNC has high machining precision and high machining quality;
CNC machining can carry out multi coordinate linkage, and can process complex shape parts;
When the parts processed by CNC machine tools are changed, only the NC program needs to be changed, which can save the production preparation time;
CNC lathe processing itself has high precision and rigidity. It can choose favorable processing amount and high productivity (generally 3 ~ 5 times of ordinary machine tool);
CNC CNC lathe has high degree of automation, which can reduce labor intensity;
CNC CNC lathe processing batch production, product quality is easy to control;

CNC CNC lathe processing shortcomings:

CNC CNC lathe processing requires lower quality of operators and higher technical requirements of maintenance personnel.
CNC machine tool processing route is not easy to control, not as intuitive as ordinary machine tools.
The lathe is inconvenient to maintain and has high technical requirements;
The processing technology of CNC lathe is not easy to control.

CNC computer gongs machining circular interpolation instructions

When I and K are zero, they can be omitted; regardless of G90 or G91 mode, I, J, K are programmed according to relative coordinates; when circular interpolation, tool compensation instruction G41 / G42 cannot be used.

The advantages and disadvantages between G92 and G54-G59 are the coordinate system set before machining, while G92 is the coordinate system set in the program. If G54-G59 is used, there is no need to use G92 again, otherwise G54-G59 will be replaced and should be avoided, as shown in Table 1. Table 1 difference between G92 and working coordinate system`

Note: (1) once G92 is used to set the coordinate system, G54-G59 will not work unless the system is restarted after power failure or G92 is used to set the required new workpiece coordinate system. (2) After using G92 program, if the machine tool does not return to the original point set by G92, the program will be started again, and the current position of the machine tool will become the new workpiece coordinate origin, which is prone to accidents. Therefore, we hope that readers will use it carefully.

The program of tool changing is compiled.

In the machining center, tool change is inevitable. However, there is a fixed tool change point when the machine tool leaves the factory. If it is not in the position of tool change, it is impossible to change the tool. Moreover, before changing the tool, the tool compensation and circulation must be cancelled, the spindle is stopped and the coolant is turned off. There are many conditions. It is not only easy to make mistakes but also inefficient to ensure these conditions before each manual tool change. Therefore, we can compile a tool change program to save the memory and MDI status

Under the call of M98, the tool change action can be completed at one time.

Taking pmc-10v20 machining center as an example, the program is as follows:

O2002; (program name)

G80g40g49; (cancel fixed cycle, cutter compensation)

M05; (spindle stop)

M09; (coolant off)

G91g30z0; (Z axis returns to the second origin, i.e. tool change point)

M06; (tool change)

M99; (end of subroutine)

When the tool needs to be changed, just type “t5m98p2002” in MDI state to replace the required tool T5, thus avoiding many unnecessary mistakes. According to the characteristics of their own machine tools, the majority of readers can work out the corresponding tool change program.

other

The sequence number of the program segment is represented by address n. Generally, the memory space of NC device itself is limited (64K). In order to save storage space, the sequence number of program segment is omitted.

N only means the segment label, which is convenient to find and edit the program, and has no effect on the processing process. The sequence number can be increased or decreased, and the continuity of the value is not required. However, some loop instructions, jump instructions, calling subroutines and mirror instructions can not be omitted.

In the same program segment, the last occurrence of the same instruction (the same address symbol) or the same set of instructions will work.

For example, tool change procedure, t2m06t3; instead of T2, T3 is replaced;

G01g00x50.0y30.0f200; G00 is executed (although there is f value, G01 is not executed). If the instruction codes are not in the same group, the effect is the same if they are exchanged in the same program segment

CNC high gloss and high precision machining method

Machining surface roughness is one of the important marks to measure the quality of machined surface. It has a great influence on the wear resistance, corrosion resistance, fatigue strength and matching properties of parts. However, there are many factors affecting the surface roughness in machining. In order to achieve good surface roughness, we will learn what these factors are.

1、 The reason of rough machining surface

Residual area: residual area refers to the area that remains on the machined surface after cutting by the main and auxiliary cutting edges of the tool.
Scale: when high-speed steel cutter is used to cut plastic metal materials at low or medium speed, such as low-carbon steel, medium carbon steel, stainless steel, aluminum alloy, etc., fish scale like burr is often produced on the machined surface, which is called scale bone. The appearance of scale will increase the surface roughness of the machined surface significantly.
Chip accretion: in the process of cutting, when the chip accretion is generated, the protruding part can replace the cutting edge to cut into the workpiece, and draw grooves with different depth on the machined surface; when the chip accretion falls off, some of the accumulated debris adhere to the machined surface, forming small burr, resulting in the increase of surface roughness.
Vibration: in cutting process, due to the periodic vibration of the process system, the machined surface appears streaks or ripple marks, and the surface roughness value increases significantly.

Machining: all factors that affect the residual area, scale, scale and vibration affect the surface roughness.

Cutting parameters: feed rate has the greatest influence on the residual area. When the feed rate decreases, the residual area decreases. When cutting plastic metal, when cutting speed is very low or high, the surface roughness value is small. The reason is that it is not easy to produce chip lump at low speed, and the plastic deformation decreases when cutting speed is high, which can eliminate the formation of scale. When cutting brittle materials, the influence of cutting speed is small, because the deformation of material is small, the surface roughness value also decreases.

Geometric parameters of tool: the radius of tool tip arc, main deflection angle and secondary deflection angle have great influence on residual area and vibration. Generally, when the radius of the tool tip arc increases and the main and secondary deflection angles decrease, the surface roughness value is small. However, if the machine tool stiffness is low, the tool tip arc radius is too large or the main deflection angle is too small, the vibration will occur due to the increase of cutting force, which will increase the surface roughness value.

Tool material: the size of the edge arc radius and the time to keep sharp are different with different tool materials. High speed steel tools can be sharpened very sharp, but the time is short, so the surface roughness value is small when cutting at low speed. After grinding, the radius of the edge arc is larger, and the surface roughness is smaller at high speed.

Workpiece material: when processing plastic materials, the lower the plasticity and the higher the hardness of the workpiece material, there will be scaling, scaling and hardening, and the surface roughness will be smaller. Therefore, the surface roughness value of high carbon steel, medium carbon steel and quenched and tempered steel is smaller than that of low carbon steel. When processing cast iron, the chip is of crumbling type, so under the same processing conditions, the surface roughness value of cutting cast iron is larger than that of steel

CNC computer gong machining complex parts

CNC machining center is locked by software. When the automatic operation button is pressed during simulation processing, it is not possible to directly see whether the machine tool has been locked in the simulation interface. In the simulation, there is often no tool setting. If the machine tool is not locked, it is easy to hit the tool. Therefore, before the simulation processing, you should go to the operation interface to confirm whether the machine tool is locked. Forget to turn off the idle switch during processing. In order to save time, the idle switch is often turned on when the program is simulated. Idle running means that all moving axes of the machine tool run at the speed of G00. If the running switch is not turned off during machining, the machine tool will ignore the given feed speed and run at G00 speed, which will cause the accident of cutting and hitting the machine tool. There is no return to the reference point after running the simulation without load. When checking the program, the machine tool is locked, and the tool relative to the workpiece processing is in simulated operation (absolute coordinates and relative coordinates are changing). At this time, the coordinates are inconsistent with the actual position. It is necessary to use the method of returning to the reference point to ensure that the zero point coordinate of the machine is consistent with the absolute and relative coordinates. If there is no problem found after the calibration program, the machining operation will cause tool collision. The direction of override release is wrong.

When the machine tool overtravel, press and hold the overtravel release button and move in the opposite direction with manual or manual mode, which can be eliminated. However, if the direction of release is reversed, it will cause damage to the machine tool. Because when pressing the override release, the over travel protection of the machine tool will not work, and the travel switch of the over travel protection is already at the end of the stroke. At this time, the table may continue to move towards the overtravel direction, and eventually the screw will be broken, causing damage to the machine tool. The cursor position is not correct when the specified line is running. When the specified line is running, it is usually executed from the cursor position down. For the lathe, it is necessary to call the tool offset value of the tool used. If the tool is not called, the tool in the running program section may not be the required tool, which is very likely to cause a tool collision accident due to different tools. Of course, in the machining center, CNC milling machine must first call the coordinate system such as g54 and the length compensation value of the cutter. Because the length compensation value of each knife is different, it may cause knife collision if it is not called.

CNC machining center CNC machine tool as a high-precision machine tool, anti-collision is very necessary, require the operator to develop a careful habit, according to the correct method to operate the machine tool, reduce the occurrence of tool collision. With the development of technology, there are some advanced technologies, such as tool damage detection, anti-collision detection and adaptive machining, which can better protect CNC machine tools. After the industrial revolution, the pace of production can be said to be faster and faster. Nowadays, CNC machine tools seem to be used in many fields, because of the precise control and high-end technology, the product specifications produced by them are also more standardized. All of this, thanks to CNC complex parts processing technology is becoming more and more high-end, because of this, so modern we can enjoy the production mode and efficiency that we did not dare to think of before.

Since the advent of CNC machine tools, more and more manufacturers have begun to introduce such good machinery into their respective industries. Businesses hope to pursue high output, but also require products to meet production standards. This is a very strict requirement for the machine tool. It not only requires the working efficiency of the whole machine tool to maintain high efficiency, but also has many fine requirements for each internal part. CNC complex parts processing can be said to be the basis for ensuring the overall quality of CNC machine tools. Only by ensuring that the processing technology of CNC complex parts remains at a high level, can many manufacturers be assured of using it Create more and better products.

Therefore, for businesses, the first thing to do is to be ingenious in the selection of CNC complex parts processing, can not rely on the price alone, also can not be blindly selected. For manufacturers, the best way is to select the best quality CNC through a variety of ways, which can not only increase more safety scores for future production