2020 – Page 62 – CNC Machining & Turning, Milling, Metal parts

Machining process specification

Machining process specification generally includes the following contents: process route of workpiece processing, specific content of each process and equipment and process equipment used, inspection items and inspection methods of workpiece, cutting amount, time quota, etc.

So in the process of machining, what are the steps to formulate the process specification? Let’s take a look at it

1) Calculate the annual production program and determine the type of production.

2) Analyze the part drawing and product assembly drawing, and analyze the process of parts.

3) Select the blank.

4) Draw up the process route.

5) Determine the machining allowance of each process, calculate the process size and tolerance.

6) Determine the equipment and tools, fixtures, measuring tools and auxiliary tools used in each process.

7) Determine cutting parameters and man hour quota.

8) Determine the technical requirements and inspection methods of each main process.

9) Fill in process documents.

In the process of working out the process, it is often necessary to adjust the contents that have been initially determined before in order to improve the economic benefits. Computer gong processing, Dongguan high-speed computer gong processing, Dongguan mold processing, Dongguan Mechanical parts processing, CNC processing, in the process of implementing the process specification, there may be unexpected situations, such as the change of production conditions, the introduction of new technology and new technology, the application of new materials and advanced equipment, which require timely revision and improvement of the process specification.

The technological process of machining includes, generally speaking, the process of changing the overall dimension and performance of the workpiece through a kind of mechanical equipment.

The working principle of machining process regulation is high quality, high yield and low cost, that is, under the premise of ensuring product quality, labor productivity can be improved and cost can be reduced as much as possible. What problems should be paid attention to in the process planning? Let’s take a look at it

1., the advanced technology.

In the formulation of machining process procedures, computer gong processing, Dongguan high-speed computer gong processing, Dongguan mold processing, Dongguan Mechanical parts processing, CNC processing should make full use of the existing production conditions of the enterprise, as far as possible, use domestic and foreign advanced technology and experience, and ensure good working conditions.

2. Economic rationality

Under the specified production program and production batch, there may be several process schemes that can meet the technical requirements of parts. At this time, the process cost is generally required to be the lowest through accounting or comparison with each other. Make full use of the existing production conditions, spend less and do more.

3. Good working conditions

报错笔记

Advantages of CNC machine tools over ordinary machine tools

The advantages of CNC machine tools are as follows:

1. Processing efficiency, saving processing time.

2. Work intensity. After the workers have finished programming, they can go to drink tea after the first piece is qualified.

3. Reduce the number of waste products. As long as the first piece is qualified, the processed parts will generally be qualified.

4. High safety, the farther the workers are from the processing equipment, the lower the probability of accidents.

For effective metal cutting, machining materials, cutting tools and cutting conditions are the three main factors. These determine the processing time, tool life and machining quality. Cutting conditions must be selected reasonably for economical and efficient processing methods.

The three elements of cutting conditions: cutting speed, feed and cutting depth directly cause damage. With the increase of cutting speed, the point temperature will rise, resulting in mechanical, chemical and thermal wear. If the cutting speed is increased by 20%, the tool life will be reduced by 1 / 2.

Back feed conditions and tool wear are kept to a minimum. But feeding behind, cutting temperature rise, wear. It is less than the effect of cutting speed. Cutting depth has no effect on cutting speed and feed, small cutting depth, but cutting material in hardened layer will also affect tool life.

According to the user’s processing material, hardness, cutting conditions, material selection, feed and cutting depth, the cutting speed is used.

Based on the selection of the most suitable process conditions, these factors are selected. Regular life and stable wear are the most ideal conditions.

However, in practice, the selection of tool life and tool wear, through machining size, surface quality, noise reduction, heat and so on. Under certain processing conditions, it is necessary to study according to the actual situation. Difficult to machine materials such as stainless steel, heat-resistant alloy, can use coolant or choose a good rigid blade.

Reasonable selection of cutting tools

1。 Rough rotation, should choose high strength, good durability knife, in order to meet the large car turning, feedback.

2。 The essence of automobile is to select high precision, durable and good cutting tools to ensure the machining accuracy.

3。 Reduce the conversion time and knife convenience, should try to use machine knife and machine clip blade.

Select fixture

1。 General fixture should be selected to clamp workpiece as much as possible, and special fixture should be avoided;

2。 Positioning error is reduced by coincidence.

Determine the processing route

Machining path is the part of tool path and direction relative to each other in the process of exponential control.

1。 It should be able to meet the requirements of machining accuracy and surface roughness;

2。 Shorten the processing route as far as possible and reduce the idle travel time of the tool.

Machining route and allowance

Introduction of CNC machining power input unit and power control part

There are two lights on the power supply of the computer gongs processing center unit. One is the power indicator light, which is green; the other is the power alarm light, which is red. The power supply unit here includes power input unit and power control part.

First of all, we should know that when the power supply of Dongguan mold machining center cannot be connected, if the power indicator (green) is not on. The fuses F1 and F2 of the power supply unit have been blown. This is due to high input voltage, or the components of the power supply unit itself have been damaged.

The input voltage is low. Please check the voltage entering the power supply unit. The allowable voltage value is ac200v + 10%, 50Hz ± 1Hz. The power supply unit is not good, there is element damage in it. The power indicator light is on, and the alarm light is also gone, but the power supply cannot be connected. Dongguan machine parts processing at this time because the power on (on) conditions are not satisfied. By the following switching circuit, the power supply conditions are as follows:

There are three conditions for the power supply of Dongguan large CNC machining center: first, the source on button is closed. Second, the power off button is closed. Third, the external alarm contact is opened.

The alarm light of power supply unit of Dongguan large CNC machining center is on: the fuse of 24 V output voltage is fused, and + 24 V voltage is used on 1.9 “display screen, as shown in the figure below. Check whether + 24 V is short circuited to the ground.

Mold processing technology

Mold processing refers to the processing of forming and blank making tools, in addition to shear mold and die-cutting mold. In general, the mold is composed of upper mold and lower mold. The steel plate is placed between the upper and lower dies to form the material under the action of the press. When the press is opened, the workpiece determined by the shape of the die can be obtained or the corresponding waste can be removed. Parts as small as electronic connectors and as large as automobile dashboard can be molded with molds. Progressive die is a set of mold which can automatically move the workpiece from one station to another, and get the molding parts in the last station.

Die processing technology includes: cutting die, blanking die, compound die, extrusion die, four slide die, progressive die, stamping die, die cutting die, etc.

Mold type:

1. Metal stamping die

2. Plastic molding mold

3. Die casting die

4. Forging die

5. Powder metallurgy mould

6. Rubber mold

Mold processing flow:

Cutting: front die material, back die material, insert material, row position material and inclined jacking material;

Open frame: front mold frame and back mold frame;

Opening: front mold cavity opening, back mold cavity opening, parting line opening;

Copper male: front die copper male, rear mold copper male, parting line angle clearance copper male;

Grinding machine: insert, internal mold material, row position, inclined top;

Deep hole drilling: water transportation;

Wire cutting: insert parting line, copper male, oblique top pillow position;

Computer gongs: fine gongs parting line, fine gongs after mold core;

Mold processing flow

Cutting: front die material, back die material, insert material, row position material and inclined jacking material;

Open frame: front mold frame and back mold frame;

Opening: front mold cavity opening, back mold cavity opening, parting line opening;

Copper male: front die copper male, rear mold copper male, parting line angle clearance copper male;

Wire cutting: insert parting line, copper male, oblique top pillow position;

Computer gongs: fine gongs parting line, fine gongs after mold core;

EDM: front die thick, copper male, male mold line angle clearance, back mold bone position, pillow position; drilling, pinhole, thimble; row position, row position pole; oblique top compound thimble, with thimble;

Others: ① nozzle, die pit, garbage nail (limit screw); ② flying die; ③ nozzle, strut, spring, water transportation; Provincial mold, polishing, front mold, and back mold bone position; water structure, pull rod screw hook, spring quenching, row position surface nitriding; mold modification and lettering

Precision machining

Today, metal processing, or hardware processing, are special machinery and equipment, easy to work, and much more efficient than manual work, if there is no mechanical equipment, the number of manual work is not able to keep up with the development of today, today’s machinery and equipment can be said that all industries have been throughout, packing machine, packaging machine, folding machine, crane, computer gong Processing | Dongguan computer gongs processing | Shenzhen computer gongs processing | mechanical parts processing | Guangzhou computer gongs processing | forklift trucks and other equipment, in today’s can say that the use of such equipment |!!!

When stopping the precision machining, if the data selected are not awesome enough, it may cause the parts to be processed can not meet the needs of the mechanical equipment, because in this way, the condition of material request must be clearly known when stopping processing.

If is to the metal material stop processing, then, should see its hardness how kind, in many metal material, stainless steel is the hardest, and cast iron is slightly second, copper hardness under cast iron, and aluminum hardness is the lowest, so, workpiece to hardness request high should choose stainless steel, and request low should choose aluminum.

1. First of all, we should understand the hardness request. The higher the hardness request of some equipment used by the central government, the better. However, this kind of ordinary hardness request is only for the processing of the workpiece. If it is processing data, then, computer gong processing, Dongguan computer gong processing, Shenzhen computer Gong processing, mechanical parts processing, Guangzhou computer gong processing, the hardness should not be too hard, Otherwise, the data may be too hard and affect the normal operation of the machine.

2. Then, to see the detailed role of processing parts, if it is used in some high-temperature industries, then the selected material must be high-temperature resistant material, and used in some other industries, then, according to the industry request to select the appropriate material line.

Matters needing attention in processing various aluminum plates

According to the different processing technology, it can be divided into cold rolling and hot rolling.

According to the different thickness, it can be divided into thin plate and medium plate. In GB / t3880-2006 standard, the thickness less than 0.2mm is called aluminum foil. More commonly used brands: pure aluminum plate, strip. Foil. Thick plate, stretch tube. Squeeze the tube. Type. Great. Cold working bar is mainly used in the situation where high corrosion resistance and formability are required, but the strength requirement is not high, such as chemical equipment, marine equipment, railway tank car, conductive material, instrument material, welding rod, etc.

3003: plate and strip. Foil. Plate. Stretch the tube. Squeeze the tube. Type. Great. wire rod. Cold working bar, cold working wire, rivet wire, forging, heat sink material. It is mainly used for processing parts that need good molding performance, high corrosion resistance, or good weldability, such as computer gongs processing, Dongguan computer gongs processing, Shenzhen computer gongs processing, mechanical parts processing, Guangzhou computer gongs processing, or workpieces requiring both these properties and higher than 1 * * alloy strength, such as tanks and tanks for liquid transportation, pressure tanks, storage devices, heat exchangers , chemical equipment, aircraft fuel tank, oil duct, reflector, kitchen equipment, washing machine cylinder, rivet, welding wire. Aluminum clad 3003 alloy: plate, thick plate, stretch tube. Extruded tube plate, 3004, extruded pipe plate, etc. As long as the extruded tube is used in all aluminum can body, the requirements are higher than 3003 alloy parts, chemical products production and storage device, sheet metal processing parts, building baffle, cable duct, sewer, various lamp parts.

Aluminum clad 3004 alloy: plate, thick plate is mainly used for building partition, baffle, sewer, industrial plant roof 5052: plate, thick plate, foil, tensile pipe, cold working bar, cold working wire rod, rivet wire rod. This alloy has good formability, corrosion resistance, weldability, fatigue strength and medium static strength. It is used for manufacturing aircraft fuel tank and oil pipe , as well as the sheet metal parts of traffic vehicles and ships, instruments, street lamp bracket and rivet wire. 6061: plate, thick material, stretch tube. Extruded tube, bar, profile, wire, conduit, rolled or extruded structural section, cold worked bar, cold worked wire, rivet wire, forging. All kinds of industrial structural parts with certain strength, corrosion resistance and high weldability are required, such as pipes, bars and profiles used for manufacturing trucks, tower buildings, ships, trams, railway vehicles, furniture, etc.

According to the different metal elements contained in aluminum plate, aluminum plate can be divided into nine categories, that is, nine series. The following is a brief introduction.

1、 The 1000 series represents 1050 1060 1070 series aluminum plate, also known as pure aluminum plate. In all series, 1000 series belongs to the series with the most aluminum content. The purity can reach 99.00%. Because it does not contain other technical elements, computer gong processing | Dongguan computer gong processing | Shenzhen computer gong processing | mechanical parts processing | Guangzhou computer gong processing | so the production process is relatively simple and the price is relatively cheap, which is the most commonly used series in conventional industries. At present, most of the 1050 and 1060 series are in circulation in the market. The minimum aluminum content of 1000 series aluminum plate is determined according to the last two Arabic numerals. For example, the last two Arabic numerals of 1050 series are 50. According to the international brand naming principle, the aluminum content must reach 99.5%, and the top is the qualified product. China’s aluminum alloy technical standard (GB / t3880-2006) also clearly stipulates that the aluminum content of 1050 is 99.5%. Similarly, the aluminum content of 1060 series aluminum plate must reach more than 99.6%.

2、 2000 series aluminum plate represents 2A16 (Ly16) 2A12 (LY12) 2A06 (LY6) 2000 series aluminum plate is characterized by high hardness, among which copper element content is the highest, about 3-5%. The 2000 series aluminum plate belongs to aviation aluminum material, which is not often used in conventional industry. At present, there are few manufacturers of 2000 series aluminum plate in China. The quality cannot be compared with that of foreign countries. At present, the imported aluminum plate is mainly provided by Korean and German manufacturers. With the development of China’s aerospace industry, the production technology of 2000 series aluminum plate will be further improved.

3、 3000 series aluminum plate represents 3003 3003 3A21. It can also be called antirust aluminum plate. The production process of 3000 series aluminum plate in China is excellent. The 3000 series aluminum plate is mainly composed of manganese. The content is between 1.0-1.5. It is a series with good antirust function. Conventional application in air conditioning, refrigerator, car bottom and other humid environment, the price is higher than 1000 series, is a more commonly used alloy series.

4、 The 4000 series aluminum plate represents 4a01. The 4000 series aluminum plate belongs to the series with high silicon content. Generally, the silicon content ranges from 4.5% to 6.0%. It belongs to building materials, mechanical parts, forging materials, welding materials; low melting point, good corrosion resistance. Product Description: it has the characteristics of heat resistance and wear resistance.

5、 The 5000 series represents the 5052.5005.5083.5a05 series. 5000 series aluminum plate belongs to the common alloy aluminum plate series, the main element is magnesium, the magnesium content is between 3-5%. It can also be called aluminum magnesium alloy. Its main characteristics are low density, high tensile strength and high elongation. In the same area, the weight of aluminum magnesium alloy is lower than other series. Therefore, it is often used in aviation, such as aircraft fuel tank. It is also widely used in conventional industry. The processing technology is continuous casting and rolling, belonging to the hot rolling aluminum plate series, so it can do oxidation deep processing. In China, 5000 series aluminum plate belongs to the more mature aluminum

6、 The 6000 series represents 6061, which mainly contains magnesium and silicon. Therefore, it concentrates the advantages of 4000 series and 5000 series. 6061 is a cold-treated aluminum forging product, which is suitable for applications requiring high corrosion resistance and oxidation resistance. Good usability, excellent interface characteristics, easy coating and good processability. It can be used in low-pressure weapons and aircraft joints. 6061 general characteristics: excellent interface features, easy coating, high strength, good usability, strong corrosion resistance, computer gong processing in Dongguan, computer gong processing in Shenzhen, mechanical parts processing in Guangzhou. Typical uses of 6061 aluminum: aircraft parts, camera parts, couplers, ship accessories and hardware, electronic accessories and joints, decorative or various hardware, hinge head, magnetic head, brake piston, hydraulic piston, electrical accessories, valves and valve parts.

7、 7000 series represents 7075, mainly containing zinc. 7075 aluminum plate is stress relieved, and will not deform and warp after processing. All super large and super thick 7075 aluminum plates are detected by ultrasonic wave, which can ensure no sand hole and impurity. The high thermal conductivity of 7075 aluminum plate can shorten the forming time and improve the working efficiency.

Its main feature is high hardness, high strength aluminum alloy, which is commonly used to manufacture aircraft structure and futures. It requires high strength, strong corrosion resistance of high stress structural parts, mold manufacturing. At present, China’s production technology needs to be improved. Computer gong processing | Dongguan computer gong processing | Shenzhen computer gong processing | mechanical parts processing | Guangzhou computer gong processing (our company once had a foreign enterprise put forward the problem of uneven annealing of domestic 7075 aluminum plate, resulting in inconsistent surface and internal hardness of aluminum plate).

8、 The more commonly used 8000 Series is 8011, which belongs to other series. In my memory, the aluminum plate mainly used for bottle cap is also used in radiator, most of which are aluminum foil. Not very often.

9、 9000 series belongs to spare series, and science and technology is so developed now. In order to cope with the emergence of aluminum plate containing other alloy elements, the international aluminum plate and strip Federation specially indicates that 9000 series is standby series, waiting for another new variety to appear to fill the gap of 9000 series.

NC machine tool processing method

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 control the value of the end of the travel coordinate, without any reduction in the process of moving, Computer gong processing, Dongguan computer gong processing, Shenzhen computer gong processing, mechanical parts processing, Guangzhou computer gong processing, the moving speed and path between the two related points depend on 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 CNC lathe robot, for example, Improve spindle speed control, computer gong processing, Dongguan computer gong processing, Shenzhen computer gong processing, mechanical parts processing, Guangzhou computer gong processing, 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, CNC lathe robot is different, its control circuit is also different, so the universality of the system is poor, because it is all composed of hardware, so the function and flexibility are poor. 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, such as computer gong processing, Dongguan computer gong processing, Shenzhen computer gong processing, mechanical parts processing, Guangzhou computer gong processing. Its main CNC functions are almost completely realized by software. For different CNC lathe robots, only different software needs to be compiled, 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 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 CNC lathe robot (also known as multi-step or boring and milling machining center, CNC lathe robot is usually called machining center), Computer gongs processing, Dongguan computer gongs processing, Shenzhen computer gongs processing, mechanical parts processing, Guangzhou computer gongs processing CNC lathes, robot processing development direction 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.

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

1. 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.

2. 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.

3. Scab: in the process of cutting, when a chip is formed, the protruding part can replace the cutting edge to cut into the workpiece by computer gong machining | Dongguan computer gong machining | Shenzhen computer gong machining | mechanical parts processing | Guangzhou computer gong processing. The grooves of different depths are drawn on the machined surface; when the chip accretion falls off, part of the accumulated debris adheres to the machined surface and forms Small burr will increase the surface roughness.

4. 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.

1. 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.

2. 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.

3. Tool material: the size of the edge arc radius and the time to keep sharp are different with different tool materials. High speed steel cutting tools can be grinded very sharp, but the holding 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.

4. 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. The surface roughness ratio of carbon steel is low after machining.

What is CNC unit center

The operation and monitoring of CNC machine tools are all completed in this CNC unit, which is the brain of CNC machine tools.

Compared with ordinary machine tools, CNC machine tools have the following characteristics: computer gong processing, Dongguan computer gong processing, high-speed computer gong processing, mechanical parts processing, computer gong processing

High machining precision and stable machining quality;

It can carry out multi coordinate linkage and process parts with complex shapes;

When the processing parts are changed, the CNC program only needs to be changed to save the production preparation time;

The machine tool itself has high precision and rigidity. It can choose favorable processing amount and high productivity (generally 3 ~ 5 times of ordinary machine tool);

High degree of automation of machine tools can reduce labor intensity;

The requirements for the quality of operators are higher, and the technical requirements for maintenance personnel are higher.

CNC machine tools are generally composed of the following parts:

The main engine is the theme of CNC machine tools, including machine body, column, spindle, feed mechanism and other mechanical components. It is a mechanical part used to complete various cutting processes.

CNC device is the core of CNC machine tool, including hardware (printed circuit board, CRT display, key box, paper tape reader, etc.) and corresponding software for inputting digital part program, Dongguan computer gong processing, high-speed computer gong processing, mechanical parts processing, computer gong processing, etc The transformation, interpolation and Realization of various control functions.

Drive device, which is the driving component of the executive mechanism of CNC machine tool, including spindle drive unit, feed unit, spindle motor and feed motor, etc. Under the control of the numerical control device, he realizes the spindle and feed drive through the electric or electro-hydraulic servo system. When several feed linkage, positioning, straight line, plane curve and space curve processing can be completed.

Auxiliary device, some necessary matching parts of index control machine tool, to ensure the operation of CNC machine tool, such as cooling, chip removal, lubrication, lighting, monitoring, etc. It includes hydraulic and pneumatic devices, chip removal device, exchange table, CNC turntable and CNC dividing head, as well as cutting tools and monitoring and detecting devices.

Programming and other auxiliary equipment can be used to program and store parts outside the machine.

Since the first CNC machine tool was developed by Massachusetts Institute of technology in 1952, CNC machine tools have been widely used in manufacturing industry, such as computer gong processing, Dongguan computer gong processing, high-speed computer gong processing, mechanical parts processing, computer gong processing, especially in automobile, aerospace and military industries. Numerical control technology has been rapidly applied in both hardware and software development.

Curved surface molding mold processing

When machining the surface of aircraft and automobile parts, impeller, computer gong, propeller and various curved surface forming molds, the CNC machining center can ensure the accuracy requirements of special-shaped parts and curved surfaces, and greatly improve the processing efficiency. Next, let’s take a look at how the CNC machining center processes the special-shaped parts and curved surfaces?

The key work of NC machining center to process the surface of these dissimilar parts is to work out a reasonable machining program and select a suitable cutting tool. The work of the latter is relatively simple and can be completed quickly according to the mold drawing and process requirements. The preparation of Engineering sequence is the most important part of the whole preparation work, and it is also the whole mold processing The most important and important job.

Through the application of UG software in recent years, Shandong Weiwei Heavy Industry Machine Tool Co., Ltd., a manufacturer of CNC machining center, has summed up a set of NC programming methods suitable for all kinds of complex surfaces according to the common technical difficulties in the manufacturing process. The process of computer gong machining includes: establishing mathematical model, determining machining coordinate system, planning cutter location source file, etc.

1、 Establish mathematical model

Before establishing the model, we should first consider the order and method of establishing the features of the model. What should be done first, what should be done later, what method should be used, and what kind of modeling function should be used. This relationship must be properly dealt with when building a mathematical model.

2、 Determine the machining coordinate system

The establishment of solid model is based on working coordinate system, while the generation of machining tool location source file of CNC machining center is based on machining coordinate system. The position of the coordinate origin of the machining coordinate system should be convenient for the processor to quickly and accurately set the tool and to facilitate the size calculation needed in the processing process.

3、 Planning tool location source file

According to the structural characteristics of different product profiles, we can select three processing modules with their own characteristics, such as plane milling, computer gong machining cavity milling and fixed axis contour milling, to plan the machining tool location source files of various types of surfaces.

In a word, we should grasp the application characteristics of each module flexibly according to the different mold surface and contour surface, so that we can process the satisfied products with high quality and efficiency through the CNC machining center.