In the field of CNC processing industry, CNC processing is also known as CNC machine tools. It mainly refers to the path of feed processing. It refers to the path through which the turning tool starts to move from the tool setting point (or the fixed origin of the machine tool) until it comes back to this point and completes the processing program, including the path of cutting processing and the path of non cutting empty stroke such as cutting in and cutting out of the tool. These are NC commands to complete the operation automatically.
In the process of finishing, the feeding path is basically carried out along the order of parts generalization. Therefore, the key point of determining the feeding path is to determine the feeding path of rough machining and empty stroke.
In the process of NC machine tool machining, the machining process should follow the following rules.
It should be able to ensure the accuracy and surface roughness of the workpiece to be processed.
Make the processing path shortest, reduce the empty travel time and improve the processing power.
Simplify the amount of numerical calculation and the processing procedure as much as possible.
Subprogram should be used to save processing time for some repeated programs.
In the mechanical processing industry, there is such a processing machine, the operation process is completely ordered by the technician with computer programming code, which belongs to precision processing equipment, which is often referred to as CNC processing. Today to a simple understanding of CNC machining parts in the clamping method which
Before CNC machining parts, the size of parts need to choose different clamping methods. What kinds of clamping methods are there in the process of parts processing? The first is to clamp the parts with the jaw, which is suitable for processing the parts with small appearance and not exceeding the scope of the jaw; The third is directly fixed to the platform for processing, which is generally large and complex parts processing, because fixed on the platform can also improve the processing quality; Finally, the use of fixture fixture to clamp parts processing, this for some batch parts or mass parts processing, the main advantage is accurate positioning processing, improve production and processing efficiency!
The above is about the clamping method in CNC machining parts.
Precision machinery parts processing first station (engaged in precision parts processing, professional CNC processing manufacturers)! In the machining circuit, the parts with high precision are often encountered. Now let’s understand the analysis of the positioning error in the processing technology
In terms of machining process, positioning error can be divided into various situations. The following should be paid attention to during operation:
Positioning error is the positioning error of a processing precision parameter in the processing of a part. It is a part of the machining error of the machining accuracy parameter.
A process and positioning scheme can produce different positioning errors for several machining accuracy parameters of the process. Therefore, the positioning errors of these machining accuracy parameters should be calculated respectively.
The premise of analyzing and calculating the positioning error is to ensure the accuracy of processing requirements by using fixture clamping and processing a batch of parts with adjustment method.
The positioning error obtained by analysis and calculation refers to the maximum range of positioning error that may occur when processing a batch of workpieces. It is a limit value, not a specific value of the positioning error of a workpiece.
The most important position change of the design datum of machining a batch of parts relative to the fixture tool adjustment datum is the cause of the positioning error, not necessarily the positioning error.
These simple understanding of the positioning error analysis and calculation, in the process of precision CNC machining parts, mechanical parts processing, there are many reasons affecting the size of the error.
In the hardware processing and manufacturing industry, slow wire cutting and fast wire cutting both refer to WEDM, so what’s the difference between these two processing technologies? Let’s take a look at the following:
Development status of low speed wire processing technology
Multiple cutting technology is the fundamental means to improve the machining accuracy and surface quality of slow wire. Generally, it is formed by one cutting, the accuracy is improved by two cutting, and the surface quality is improved by more than three cutting.
Because of the lag of the electrode wire when cutting the corner, the corner will collapse. In order to improve the corner cutting accuracy, more dynamic corner processing strategies are adopted. Such as: automatic change of processing speed, automatic adjustment of water pressure, control of processing energy, etc.
The high precision finishing circuit adopted by the advanced slow moving machine tool is an effective technology to improve the flatness of the workpiece, which significantly improves the accuracy of thick workpiece processing; In order to carry out micro finish machining of small fillet, narrow slot, narrow groove and micro parts, the NC low speed WEDM machine tool can use 0.02 ~ 0.03 mm electrode wire for cutting.
In order to ensure high-precision machining, the mechanical accuracy, pulse power supply accuracy and servo control accuracy of the machine tool (including the control of mechanical motion, pulse parameters, wire feeding system and working fluid system) have reached a very high level. Using water temperature cooling device, the internal temperature of the machine tool is the same as the water temperature, which reduces the thermal deformation of the machine tool; The closed-loop digital AC (DC) servo control system ensures excellent dynamic performance and high positioning accuracy. The machining accuracy can be controlled within several microns, and the precision positioning can achieve 0.1 μ The control of m equivalent; Immersion machining is used to reduce the thermal deformation of the workpiece; Motor servo, closed loop electrode wire tension control; Using voltage modulation tool setting power supply to achieve high-precision tool setting, tool setting accuracy can reach 0.002 mm, no damage to the workpiece, no matter dry or wet.
Advantages of 2-wire processing technology
Medium speed wire cut electrical discharge machining (ms-wedm) belongs to the category of reciprocating high-speed WEDM, which realizes multiple cutting function on high-speed reciprocating WEDM, and is commonly known as “medium speed wire cut”. The so-called middle wire cutting does not mean that the wire cutting speed is between high speed and low speed, but the compound wire cutting machine. That is to say, the wire cutting principle is to adopt high speed (8-12m / s) wire cutting in rough machining and low speed (1-3m / s) wire cutting in finish machining. In this way, the work is relatively stable and the jitter is small, and the error caused by material deformation and molybdenum wire loss can be reduced through multiple cutting, The processing quality can be between high speed wire feeder and low speed wire feeder. Therefore, the user’s “medium wire” is actually a reciprocating WEDM, which uses the processing technology of some low-speed wire cutting machines for reference, and realizes the stripless cutting and multiple cutting.
As for the second cutting, low speed wire feeding and speed limited feeding are adopted. In the process of machining, the deformation treatment should be paid attention to for many times of cutting, because when the workpiece is online cutting, with the effect of the original internal stress and the influence of the processing thermal stress produced by spark discharge, the non directional and irregular deformation will be produced, which makes the cutting depth uneven and affects the processing quality and accuracy. Therefore, it is necessary to reserve different machining allowance according to different materials, so as to fully release the internal stress and complete torsion deformation of the workpiece. In the subsequent multiple cutting, there is enough allowance for finishing machining, so that the later size of the workpiece can be guaranteed.
▌ advantages of fast wire processing technology
As the name suggests, fast wire processing is named for the high speed wire running of electrode wire in the cutting process. Fast moving machine tool is an electric machine tool created by Du in China. After decades of continuous improvement and development, it has become an important processing means in the manufacturing industry. It can meet the requirements of medium and low-grade mold processing and other complex parts manufacturing, and occupies a considerable proportion in the medium and low-grade market.
At present, the technical index of fast cutting machine tool: the efficiency of one cutting is 180 mm ²/ The surface roughness is RA ≤ 1.0 μ m. The average efficiency is 50 mm ²/ The machining precision is 0.01mm, and the loss of electrode wire is less than or equal to 0.01mm/200000 mm ² 。 These performance indicators seem to be quite good, but it should be noted that to obtain these indicators, we need to ensure all aspects. Once there are differences, such as the concentration of working fluid and the loss of electrode wire, the stability of processing quality will be affected.
Due to the stronger social demand for product diversification, the proportion of multi variety, medium and small batch production has increased significantly, and the traditional ordinary processing equipment used in middle walking processing has been difficult to adapt to the requirements of high efficiency, high quality and diversification. However, middle walking processing has the characteristics of simple structure, low cost and low consumption, so it also has its living space. Compared with fast-moving machine tool, slow-moving machine tool has obvious advantages in processing efficiency, precision and surface quality. Although the price of the machine tool is more expensive, with the rapid development of the manufacturing industry, it will be more and more used in various processing fields.
Nowadays, manufacturers have more and more strict requirements on cutting tools. Maybe a small tool determines the quality of this product. Introduce some advantages of cutting tools
The thread milling cutter has many advantages, which is much better than the wire tapping. The thread milling cutter is more than ten times faster than the wire tapping, and has high precision and good surface roughness. The same pitch can get large and small holes, which can be processed with one cutter. The drilling and milling thread chamfering can be formed at one time, and it will not be taken out like the wire tapping after it is broken, and the resistance of the machine tool is also small.
Thread milling cutter introduction:
The traditional thread processing methods are mainly turning thread with thread turning tool or manual tapping with tap and die. With the development of NC machining technology, especially the appearance of three-axis NC machining system, a more advanced thread machining method, NC milling of thread, has been realized. Compared with traditional thread processing, thread milling has great advantages in processing accuracy and efficiency, and is not limited by thread structure and thread direction. For example, a thread milling cutter can process a variety of internal and external threads in different directions. It is very difficult to machine the thread with transition thread or undercut structure by traditional turning method or tap and die, but it is very easy to realize by NC milling. In addition, the durability of thread milling cutter is more than ten times or even tens of times that of tap, and in the process of NC milling thread, it is very convenient to adjust the diameter of thread, which is difficult to do with tap and die.
Classification of thread milling
Clip on type:
Single tooth machine clamp: mechanical structure is similar to thread turning tool. The blade is connected with the turning tool, and there is only one thread processing tooth. The cutter can only process one tooth per spiral movement cycle, and the corresponding pitch is reduced by one in the z-axis direction. The efficiency is lower than that of the thread milling cutter with multi tooth machine clamp. Multi tooth machine clamp: there are multiple thread processing teeth on the blade. When the cutter rotates for one cycle, multiple thread teeth can be processed by reducing the corresponding pitch in the z-axis, The processing effect is high
Integral type:
Integral type: there are many thread processing teeth on the blade, which is a kind of fixed pitch thread milling cutter. The cutter is made of integral cemented carbide, with good rigidity, high cutting speed and feed speed, wide processing range, compact structure, and can process small and medium diameter internal threads. But its price is more expensive
Characteristics of thread milling
1 stability
When machining difficult to machine materials such as titanium alloy, superalloy and high hardness materials, the tap will often twist or even break in the parts due to too much cutting force. In the process of long chip material, once the chip removal is not smooth, the chip will wind the tap or block the hole, which often leads to the tap crack or broken in the parts. Taking out the broken tap is not only time-consuming and laborious, but also may damage the parts. To solve this problem, we can use thread milling cutter. Because the thread milling cutter cuts into the material gradually, it produces less cutting force and seldom breaks. Even in case of tool breakage, because the diameter of the milling cutter is much smaller than that of the threaded hole, the broken part can be easily removed from the part without damaging the part;
High precision
Because the thread milling is through the tool high-speed rotation, spindle interpolation way to finish processing internal thread, chip removal is convenient. Milling thread belongs to chip breaking cutting, and the chip is short. In addition, the diameter of machining tool is smaller than that of machining thread, which can avoid the turning line formed by tap reversal (it is not allowed in the case of high sealing requirements). Because there is no turning line in the original milling cutter, and the tap can not be avoided. It is not easy to form sticky chips. For soft materials, chip sticking is easy to occur in the process of processing, but the screw thread requires low machine power. Because thread milling is chip breaking cutting, tool contact is local, cutting force is small, and tap tool damage is easy to deal with;
High efficiency
Processing efficiency we know that in the mass thread processing, due to the low cutting speed limit of the tap and the reverse tool withdrawal after processing the thread, it is very difficult to improve the processing efficiency. However, if we use thread milling cutter, not only its own milling speed is very high, but also its multi groove design increases the number of cutting edges, which can easily improve the feed speed, which can greatly improve the processing efficiency. In the processing of long thread, we can also choose the blade with longer blade to reduce the axial feed distance (equivalent to making the thread shorter) to further improve the processing efficiency;
Good finish
Due to the influence of low cutting speed and difficult chip breaking, it is very difficult to obtain good surface finish and thread precision when machining with tap. However, for thread milling, everything is not a problem! High cutting speed and small cutting force make the cutting surface smooth; The fine chips can be easily washed out by the coolant, and the workpiece will not scratch the machined surface. For the workpiece with high thread accuracy requirements, because the thread milling cutter relies on spiral interpolation to ensure the accuracy, only need to adjust the program to easily obtain the required high-precision thread. This feature has a great advantage in precision thread processing.
Low cost
The thread milling cutter is flexible and can be used in various working conditions. For example, we can use the same thread milling cutter to process left-hand thread or right-hand thread; It can process both external thread and internal thread. All this just needs to be done by adjusting the interpolation program. If there are multiple threaded holes with different diameters but same pitch on the part, taps with different diameters are needed. This not only requires a lot of taps, but also takes a lot of time to change the tool. If the thread milling cutter is used, because it uses spiral interpolation to process, it only needs to change the processing program to complete the processing of all diameter threads, which greatly saves the cost of the cutter and the time of tool change. In order to ensure the thread accuracy, different types of taps are needed when machining different materials with taps. However, the use of thread milling cutter has no such limitation. The same thread milling cutter can process most materials and obtain high precision thread. This can also greatly reduce the cost of cutting tools. When the processing thread is close to the bottom of the blind hole, it is difficult to obtain the complete thread at the bottom if tapping with tap. And it is possible that the tool will continue to move forward a little distance (floating tapping) during the time when the tap stops at the bottom and is ready to reverse back, which is easy to cause the tap to break. This problem can be avoided by using the thread milling cutter – the thread milling cutter is smaller than the hole, there is no need to reverse the tool, and the thread shape is still complete at the tool tip. In this way, we can get complete and precise thread depth! In some processing, thread milling can help us solve many problems. For example: in large, non-circular parts of the thread processing, if processing on the lathe, it needs complex clamping and balancing to avoid vibration. At this time can be used in the machining center processing, parts do not move, thread milling cutter rotation, to avoid balance problems. For example, when machining intermittent threads, the vibration impact has a great impact on the blade, which is easy to produce cracks. When thread milling cutter is used, because the cutter cuts into the intermittent part of the material gradually, the big impact is avoided and the tool life is prolonged.
At present, numerical control equipment is more and more common, there are many kinds of ordinary machine tools.
Lathe
It is mainly used for machining various rotating surfaces and end faces of rotating body. For example, turning inner and outer cylindrical surface, conical surface, ring groove and forming rotating surface, turning end face and various common threads, processing equipment can also process various special shapes. Drilling, reaming, reaming and knurling can also be carried out on the lathe.
Milling machine
The utility model relates to a multifunctional machine tool, which can process plane (horizontal and vertical), groove (keyway, T-groove, dovetail groove, etc.) and surface (thread, spiral groove) of split parts (gear, spline shaft, sprocket, screw) and various curved surfaces. In addition, it can also be used for machining and cutting the surface of the rotating body. When the milling machine is working, the workpiece is installed on the worktable or dividing head and other accessories. The tool rotates as the main motion, supplemented by the feed motion of the worktable or milling head, the workpiece can obtain the required machining surface. The productivity of milling machine is very high because of multi cutter intermittent cutting.
Planer
It is mainly used for processing all kinds of plane (such as horizontal, vertical and inclined surfaces, and all kinds of grooves, such as T-shaped groove, dovetail groove, V-shaped groove, etc.) and linear forming surface. If equipped with contour processing device, it can also process space surface, such as turbine wheel, spiral groove, etc. This type of machine tool has a simple tool structure, and will not cut when returning, so the productivity is low, and is usually used for single piece small batch production.
Trampoline
It is suitable for plane milling and hole machining of single batch or small batch parts in machining workshop. The end of the headstock is designed with a flat rotating disc tool holder, which is used to drill large holes and planes. In addition, it can also drill, ream and thread.
Grinding machine
A kind of machine tool, which uses grinding abrasive (grinding wheel, abrasive belt, oilstone, abrasive, etc.) as a tool to cut the surface of workpiece, is collectively referred to as grinder. Grinding machine can process all kinds of surface, such as inner and outer cylinder and cone surface, plane, gear tooth surface, spiral surface and all kinds of forming surface, as well as grinding tools and cutting, etc. Because grinding is easy to obtain high machining accuracy and good surface quality, grinding machine is mainly used for finishing parts, especially hardened steel parts and high hardness special materials.
Drilling machine
Multifunctional machine tool, suitable for drilling, reaming, reaming, boring and tapping and other applications. When the radial drilling machine is equipped with process equipment, it can also be used for drilling; The drilling rig can be equipped with a universal worktable (mdt-180 type) or milling keyway.
Gear machine
Gears are the most commonly used transmissions, including cylindrical gears with straight, spiral and herringbone teeth, bevel gears with straight and spiral teeth, worm gears and non-circular gears. The processing gear tooth surface machine tool is called gear processing machine tool.
The machine tools mentioned above are the most common
Nowadays, manufacturers have more and more strict requirements on cutting tools. Maybe a small tool determines the quality of this product. The thread milling cutter has many advantages, which is much better than the wire tapping. The thread milling cutter is more than ten times faster than the wire tapping, and has high precision and good surface roughness. The same pitch can get large and small holes, which can be processed with one cutter. The drilling and milling thread chamfering can be formed at one time, and it will not be taken out like the wire tapping after it is broken, and the resistance of the machine tool is also small.
Thread milling cutter introduction:
The traditional thread processing methods are mainly turning thread with thread turning tool or manual tapping with tap and die. With the development of NC machining technology, especially the appearance of three-axis NC machining system, a more advanced thread machining method, NC milling of thread, has been realized. Compared with traditional thread processing, thread milling has great advantages in processing accuracy and efficiency, and is not limited by thread structure and thread direction. For example, a thread milling cutter can process a variety of internal and external threads in different directions. It is very difficult to machine the thread with transition thread or undercut structure by traditional turning method or tap and die, but it is very easy to realize by NC milling. In addition, the durability of thread milling cutter is more than ten times or even tens of times that of tap, and in the process of NC milling thread, it is very convenient to adjust the diameter of thread, which is difficult to do with tap and die.
Classification of thread milling
Clip on type:
Single tooth machine clamp: mechanical structure is similar to thread turning tool. The blade is connected with the turning tool and has only one thread processing tooth. The cutter can only process one tooth per spiral movement cycle, and the corresponding pitch decreases by one in the z-axis direction. The efficiency is lower than that of the multi tooth machine clip thread milling cutter
Multi tooth machine clamp: there are many thread processing teeth on the blade. When the cutter rotates for one circle, it can process many thread teeth by reducing the pitch of the corresponding number of teeth on the z-axis, with high processing effect
Integral type:
Integral type: there are many thread processing teeth on the blade, which is a kind of fixed pitch thread milling cutter. The cutter is made of integral cemented carbide, with good rigidity, high cutting speed and feed speed, wide processing range, compact structure, and can process small and medium diameter internal threads. But its price is more expensive
Characteristics of thread milling
1 stability
When machining difficult to machine materials such as titanium alloy, superalloy and high hardness materials, the tap will often twist or even break in the parts due to too much cutting force. In the process of long chip material, once the chip removal is not smooth, the chip will wind the tap or block the hole, which often leads to the tap crack or broken in the parts. Taking out the broken tap is not only time-consuming and laborious, but also may damage the parts. To solve this problem, we can use thread milling cutter. Because the thread milling cutter cuts into the material gradually, it produces less cutting force and seldom breaks. Even in case of tool breakage, because the diameter of the milling cutter is much smaller than that of the threaded hole, the broken part can be easily removed from the part without damaging the part
High precision
Because the thread milling is through the tool high-speed rotation, spindle interpolation way to finish processing internal thread, chip removal is convenient. Milling thread belongs to chip breaking cutting, and the chip is short. In addition, the diameter of machining tool is smaller than that of machining thread, which can avoid the turning line formed by tap reversal (it is not allowed in the case of high sealing requirements). Because there is no turning line in the original milling cutter, and the tap can not be avoided. It is not easy to form sticky chips. For soft materials, chip sticking is easy to occur in the process of processing, but the screw thread requires low machine power. Because thread milling is chip breaking cutting, tool contact is local, cutting force is small, and tap tool damage is easy to deal with;
High efficiency
Processing efficiency we know that in the mass thread processing, due to the low cutting speed limit of the tap and the reverse tool withdrawal after processing the thread, it is very difficult to improve the processing efficiency. However, if we use thread milling cutter, not only its own milling speed is very high, but also its multi groove design increases the number of cutting edges, which can easily improve the feed speed, which can greatly improve the processing efficiency. In the processing of long thread, we can also choose the blade with longer blade to reduce the axial feed distance (equivalent to making the thread shorter) to further improve the processing efficiency;
Good finish
Due to the influence of low cutting speed and difficult chip breaking, it is very difficult to obtain good surface finish and thread precision when machining with tap. However, for thread milling, everything is not a problem! High cutting speed and small cutting force make the cutting surface smooth; The fine chips can be easily washed out by the coolant, and the workpiece will not scratch the machined surface. For the workpiece with high thread accuracy requirements, because the thread milling cutter relies on spiral interpolation to ensure the accuracy, only need to adjust the program to easily obtain the required high-precision thread. This feature has a great advantage in precision thread processing.
Low cost
The thread milling cutter is flexible and can be used in various working conditions. For example, we can use the same thread milling cutter to process left-hand thread or right-hand thread; It can process both external thread and internal thread. All this just needs to be done by adjusting the interpolation program. If there are multiple threaded holes with different diameters but same pitch on the part, taps with different diameters are needed. This not only requires a lot of taps, but also takes a lot of time to change the tool. If the thread milling cutter is used, because it uses spiral interpolation to process, it only needs to change the processing program to complete the processing of all diameter threads, which greatly saves the cost of the cutter and the time of tool change. In order to ensure the thread accuracy, different types of taps are needed when machining different materials with taps. However, the use of thread milling cutter has no such limitation. The same thread milling cutter can process most materials and obtain high precision thread. This can also greatly reduce the cost of cutting tools. When the processing thread is close to the bottom of the blind hole, it is difficult to obtain the complete thread at the bottom if tapping with tap. And it is possible that the tool will continue to move forward a little distance (floating tapping) during the time when the tap stops at the bottom and is ready to reverse back, which is easy to cause the tap to break. This problem can be avoided by using the thread milling cutter – the thread milling cutter is smaller than the hole, there is no need to reverse the tool, and the thread shape is still complete at the tool tip. In this way, we can get complete and precise thread depth! In some processing, thread milling can help us solve many problems.
At present, numerical control equipment is more and more common, there are many kinds of ordinary machine tools.
Lathe
It is mainly used for machining various rotating surfaces and end faces of rotating body. For example, turning inner and outer cylindrical surface, conical surface, ring groove and forming rotating surface, turning end face and various common threads, processing equipment can also process various special shapes. Drilling, reaming, reaming and knurling can also be carried out on the lathe.
Milling machine
The utility model relates to a multifunctional machine tool, which can process plane (horizontal and vertical), groove (keyway, T-groove, dovetail groove, etc.) and surface (thread, spiral groove) of split parts (gear, spline shaft, sprocket, screw) and various curved surfaces. In addition, it can also be used for machining and cutting the surface of the rotating body. When the milling machine is working, the workpiece is installed on the worktable or dividing head and other accessories. The tool rotates as the main motion, supplemented by the feed motion of the worktable or milling head, the workpiece can obtain the required machining surface. The productivity of milling machine is very high because of multi cutter intermittent cutting.
Planer
It is mainly used for processing all kinds of plane (such as horizontal, vertical and inclined surfaces, and all kinds of grooves, such as T-shaped groove, dovetail groove, V-shaped groove, etc.) and linear forming surface. If equipped with contour processing device, it can also process space surface, such as turbine wheel, spiral groove, etc. This type of machine tool has a simple tool structure, and will not cut when returning, so the productivity is low, and is usually used for single piece small batch production.
Trampoline
It is suitable for plane milling and hole machining of single batch or small batch parts in machining workshop. The end of the headstock is designed with a flat rotating disc tool holder, which is used to drill large holes and planes. In addition, it can also drill, ream and thread.
Grinding machine
A kind of machine tool, which uses grinding abrasive (grinding wheel, abrasive belt, oilstone, abrasive, etc.) as a tool to cut the surface of workpiece, is collectively referred to as grinder. Grinding machine can process all kinds of surface, such as inner and outer cylinder and cone surface, plane, gear tooth surface, spiral surface and all kinds of forming surface, as well as grinding tools and cutting, etc. Because grinding is easy to obtain high machining accuracy and good surface quality, grinding machine is mainly used for finishing parts, especially hardened steel parts and high hardness special materials.
Drilling machine
Multifunctional machine tool, suitable for drilling, reaming, reaming, boring and tapping and other applications. When the radial drilling machine is equipped with process equipment, it can also be used for drilling; The drilling rig can be equipped with a universal worktable (mdt-180 type) or milling keyway.
Gear machine
Gears are the most commonly used transmissions, including cylindrical gears with straight, spiral and herringbone teeth, bevel gears with straight and spiral teeth, worm gears and non-circular gears. The processing gear tooth surface machine tool is called gear processing machine tool.
For the current processing industry, wire cutting is a very common cutting process, for fast cutting wire cutting, the same mechanical equipment, in the hands of different people after the operation of the product quality will have a certain difference, will also have a certain impact on the normal use of the machine tool. Here, first of all, find the cutting line.
The line method is correct. If you are working on a multi-layer thin-walled sheet metal part because it is affected by dimensions such as welding or blanking, the edges of the plate will not be neat. At this time, if the cutting accuracy is not high. In this case, it can be done by using chemical fiber arrangement method or by manual method.
Alignment method of paper pattern. This alignment method is also a common method. When the multi-layer thin-walled bow and arrow is used for cutting shape processing, it is necessary to operate the inner contour or hole. Then, it is necessary to perform the silk pre threading operation in multiple places. At this time, we can paste one-to-one pattern on the workpiece to be processed, which will not only lead to the deviation of wire hole, but also lead to wire cutting. It will also become easier. Rapid cutting wire cutting is also a technology of cutting internal control, keyway or outer circle, which makes tooth shaped workpiece possible.
For the process hole to be corrected, many workpieces should be processed according to the processing steps. Generally, this process should be carried out at the bottom of the plate
Left and right and diagonal. In this case, the size of the machining hole or the quality of the surface is a better situation. You can use the corresponding hole on the bridge tool, and then use the position of the tip to perform the alignment.
Universal table alignment is also a common alignment method using fast WEDM technology. The most important feature of this correction method is that the accuracy is relatively high, so the probability of using it is relatively large.
Fast cutting line is one of the cutting methods currently used. This cutting method needs higher cutting technology, but cutting technology is actually based on cutting experience, so for the operator, we must accumulate some experience.
