Review of CIMT2001 EDM Machine
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If you have a little deep understanding of the corpse, you can understand that after a half-century of development, the EDM technology has matured like a 100-meter race. It has entered the 8th mark, and each increase of 18 is a jump. Although the wire-cutting processing width of the wire-cutting machine is 10, 〃1 catching; 1 to 3, but this is only a great breakthrough, it is a remarkable breakthrough, which can bring amazing benefits. The questions reflected in the first point of view should indeed attract the attention of the industry. Because the development of EDM technology is too fast, the level of our users can't keep up. Therefore, we need to guide the visitors to understand and evaluate the level of each exhibitor from the height of the general trend of technology development from the technical background of the products.
Due to the globalization of the market and the high development of technology, the inherent nature of the technology as a market service has become increasingly important. Although the market is different in positioning and has its own characteristics, it can only account for a small portion. Therefore, users only need to see whether the main body of the product is at the mainstream level, and estimate the common technology of the technology 1 EDM machine. 1.1 Intelligent technology EDM machining adopts servo feed from the beginning and has certain automation. Since the end of the 1970s, the introduction of CNC machine tools can be automatically positioned and manually processed. However, the EDM process is complicated and there are many random events, which cannot be handled according to the established guidelines. For example, the accumulation of concentrated electric discharge products in the machining gap, even the arcing, etc., must be continuously observed and judged by experienced technicians, and the adjustments should be explored to eliminate the optimization of the processing. The Wei-inch can be safe and effective. The emergence of steam energy technology adaptation control, today's intelligent has become the core technology of EDM machine tools, the mark of advanced level, has penetrated into each component. This kind of artificial intelligence is embodied in the processing system according to the processing requirements, according to the classification of the response, coupled with the corresponding stable and reliable supporting hardware, as well as the process database and calculation method software generated in the laboratory and production verification, such a complete system is called For the expert system. For example, Swiss Charmilles' 00, 35 forming machine, which divides the force division object into 6 types of standard processing large-area processing narrow grooves. Fine polishing and processing from the sharp corners. Each of them has a combination of various specifications and control techniques such as large-area processing in the electrode lift and recovery plus 1 according to the blood volume of the person has a small, stable violation curve, both to meet the requirements of chip removal and can avoid Excessive pumping effects cause deformation of the electrode and even the machine tool. On the contrary, if it is a narrow groove machining, in addition to the standard, it is necessary to use the speed lifting knife to ensure that the deep groove free oil level will change with the change of the machining depth, and the highest machining efficiency under the premise of safety. In short, the intelligentization is the organic combination of the high-tech and the hard-working basic experimental science database construction work of the spark gap detection technology.
1.2 The proportion of innovative patents and software in commodity prices on the exhibition platform has increased significantly. For example, the special small hole machine for the injection nozzle of Taiwan 14 can weigh 5, and the device can see clearly. The price is as high as 500,000 US dollars. The reason is that it provides a complete set of processing boring, which can meet the most stringent precision requirements for small hole machining. . In the past, when I bought things, I felt that I could touch them. The piles of indulgence were more practical. The most valuable thing now is probably a few fluttering dishes. However, according to the turnkey agreement, once installed, it can be put into normal production immediately, without user debugging and any technical investment. This is the benefit of the knowledge economy.
1.3 Automation technology Nowadays, domestic human resources are abundant. Mobility is like luxury and waste. However, for the thousand mold industry, due to the lack of skilled operation, it can save labor or heavy work, as long as it pays attention. A lot of similar information on the stand, such as one recommended by Rimu Makino, 7 sets of 1010 for workpiece and electrode pre-adjustment, 1 small data processing center and 2 EDM machines equipped with an exchangeable workbench instead of 5 Taiwan's single transport 1 0; 2. Labor costs can be reduced by 13, in addition to capital investment can be reduced 18, why not do it, 1.4 network technology China is about to enter Jia 10, mold industry and the world is bound to be imperative, so the machine tool The network technology is a regular function for brand machines. We should not ignore them. For example, the machine tool of Swiss Archie can complete the machine 1 except the boot. Net 1 data exchange ± shooting 1 consulting maintenance service. As long as the user adds a little investment and opens the networking function, the benefits it brings are long-term, very impressive 2 trends in the wire EDM machine. Common technology and the latest special technology EDM wire cutting technology is the most developed in the field of electric processing, almost no competitors. The core of this technology is high processing precision, good quality and application of the model; 1 wide, and efficient. Users have been satisfied with the wide range.
There are many factors related to machining accuracy and machining accuracy, which can be roughly divided into machine tool factors and non-machine tool factors. On the stand, the world-class brand machine in the machine tool mechanical precision pulse power supply precision servo control accuracy including the control of the mechanical motion pulse parameter wire-traveling system and the working fluid system have reached the extreme rigidity of the machine. With the addition of wire to the wire, the transmission stiffness has also been greatly improved. Swiss Archie also uses dimensional compensation, and the geometric accuracy of the machine tool has been greatly improved. Today's continued improvement focuses on overcoming the thermal deformation of the machine tool, using thermal balance thermal symmetry thermal isolation and other various applications to reduce the influence of machine heat depth and room temperature fluctuation on the machine geometry accuracy. It is common to use a constant temperature working fluid to cool the workpieces on the upper and lower frames of the column. The whole machine is tightly packed with the casing to form a small isolation thermostat. It can be said that the precision of the high-speed wire cutting machine and the coordinate grinding machine are completely equal. Speaking of the accuracy of the pulse power supply and servo control, it is possible that the concept of (5) the user has not been smeared is indeed not in the machine acceptance. So some low-end machines can take advantage of this, and the advantages of brand machines are here. Their seven machines can be produced overseas, but the cabinets are closed at headquarters. With long-term technical accumulation, advanced quality management and manufacturing capabilities, they ensure the stability and coordination of the performance of various functional components from the system, and these aspects are the core technologies that we know very little about the need to make up the lessons.
Non-machine tools that affect machining accuracy, such as the quality of the operator, human error, etc. can now be removed with a powerful process database and intelligent control system. For example, Archie has a claw and a function to confirm whether the input data is missing. . However, there is no way to consider the internal stress of the workpiece material that cannot be measured. Therefore, the size and shape of the workpiece are closely related to the achieved machining accuracy. The machining accuracy that can be achieved is the size of the given size and shape. Piece cutting. For example, a hexagonal cylinder sample with a height of 40 mm and an X-inch side of 30 mm refers to a deviation from a nominal size of 30, and a total of 9 data in the middle and lower sections. Note that the requirements here are absolute, and the seven should be like the matching and exchange of the small gaps. Switzerland's Achigong's tile 1 can reach 3 relative nominal size ± 1.5 and this is the United States Moore River, 1 company's newly developed 4500 Jiajiao coordinate grinding machine life and the impact of the burrs of the punching pieces is huge, it is generally noted that there are There is no angle before the corner cut, the sharp angle of the brand machine and the small corner angle can reach 1 with the loosening of the drill and the surface micro-crack caused by the excessive wear of the blade. Now the AC pulse power supply with zero average voltage has been used. Minimized to a minimum. In addition, due to the improvement of the pulse power supply, high peaks are generally adopted. For example, the core of the 纥 motor has reached a narrow pulse width microsecond level, and most of the materials are gas phase throwing, taking a lot of heat, and the surface temperature of the workpiece is not going up. The phenomenon of cracking is greatly reduced. It can be considered that the wear resistance and grinding of the wire-cut carbide die cutting edge today are no different. Charmilles claims that the metamorphic layer is only 1 thick and has no microcracks.
Due to the appearance of narrow pulse high peak pulse power supply and the wire-feeding system, the servo feed system is continuously improved and considered, many of which are in the form of state nozzles, the distance between the workpieces, whether the finishing is in the slit or the like. It is designed to reduce the gap and the concave surface of the machined surface, so that the number of cuttings with the same precision and surface roughness is greatly reduced, so that not only the processing efficiency is high, the electrode consumption is small, and the cutting is biased. The autumn is small, and the shape accuracy is also clearly improved.
2.2 Expert system brand machines have an expert system for food. Although the names are different, the functions are similar. The first is the process expert system, which gives the set of parameters according to the processing requirements. The level of the level depends on the size of the range, and should be included in the regular electrode wire number and the corresponding workpiece material. = Recently, the number of twists such as 13 special linings is also provided. 1 According to whether the upper and lower nozzles are in contact with the workpiece, the distance is large, it is refined in the slit, and the sturdy surface of the anvil is also rough and efficient. Priority processing strategies to generate their own standards. In the case of correct selection of the standard, there is a discharge expert system to cope with the random factors in the cutting. In the case of cutting the cutting cross-section change center cutting near the edge cutting large section high-speed cutting, etc., the wire is stably and efficiently processed.
The level of stepped cutting has generally improved. The cornering strategy that used to spend the door has now reached the same goal. The corner expert system adopts a stepwise change of processing parameters, and the lag of the electrode wire disappears and then turns, and also notices the size and discharge point of the corner trimming during the finishing turn. The change in the actual moving speed causes a change in the corner machining gap. Of course, this corner expert system that does not change the processing trajectory sacrifices some processing efficiency while ensuring the accuracy of the corner, and the user can obtain a satisfactory compromise between accuracy and efficiency. Of course, there is also a case in the evening. The Swiss company Achi is highly daring. On the basis of sufficient tests, it can also use the rough track corner roughing, without reducing the efficiency.
23 automatic threading automatic threading has made great progress recently. It is generally adopted that the diameter of the twisted wire before the threading becomes thinner and harder, the threading nozzle is also smaller, and the water column is pierced in the nine pool. There is a high success rate of threading between the thread and the threading hole with a gap of only 0.051. The hole before threading is searched, and the position of the short circuit is automatically found after passing through. These functions are fully equipped.
Now every family is fighting, because they wear faster than 2,8, but the working conditions are not good. 1 is the fastest to say. But in general it is much faster than before. Due to the complexity of this part of the structure, the improvement is very frequent, and the function of self-diagnosis self-cleaning and maintenance has increased a lot.
The highlight of this exhibition should be the 203 line cutting and center pavilion of the Swiss Charmilles company. It can realize the best between the 0251 and the 01 electrode wire in the 45; because the two electrode wires of the machine are in their best. Working condition 1 temple life, so the operator does not need to intervene in the automatic conversion, thus ensuring the continuous operation of the machine tool, the general use of Pa, for the rough processing of the bungee wire twice. The filaments are finished 3 times and finished with clear corners and narrow slits. In the case of coreless processing, it can be used first. EDM milling of 25,1 thick wire-completed holes removes all materials with high efficiency and eliminates the need for expensive filaments, saving considerable cost. Also, after the micro-hole processing is completed by the filament, the guide post hole or the pin hole can be processed with a thick wire. The action of this double wire system is not complicated, and the wire travel time has not changed. It is just a thick wire library. There are two guide wire wheels on each drive shaft. Use the pull button and the brake button to select which wire feed system works. . The two swingable guide wires share a set of diamond guides. The guides can compensate for the wear after turning the angle. The idea of ​​reusing the automatic wire change is not the case today, just because the wire cutting system is originally structured. It is very complicated. If it is not for the past five years that Xia Mier has made a series of major improvements in design, the two-wire system is unlikely to succeed. At this exhibition, Ryoden and Makino have introduced their own high-performance wire-traveling system. It can be estimated that the ten-line system will become the target of the solution. The system does not limit the scope of application. . The micro-machining of the electrode wire with the charge of 030050.07 can also be done under the control of the taper expert system. Other advances may be the peak and narrow-pulse broadband of the pulsed source. The long-lasting 300 has not been updated, the highest cutting The speed has made a breakthrough. The Ryoto has reached 3,252 Makino and reached 350, 21 paintings, all of which said that the boundary can also be caused by the test conditions. Regardless of whether the cyclone speed has much practical value, it is said that the conventional processing speed is also increased by 50.
Line cutting, the expansion of the machine variety at both ends. Japan's Makino 1 under 2 horizontal oil release micro-cutting machine. The hole can reach 7 surface roughness of 0.035, 1. And its mainframe is still 6 largest workpieces up to 3000 medium high 500. This, the cutting violation can still reach 0.2 processing.
In order to make the human-machine interface more friendly. Accelerate the increase of 1 speed and increase the efficiency of 1 operation. Rhombus uses a 64-bit high-performance numerical control system with multi-task operation and adopts the operation page guided by the work task. The job can be completed on one page, and the operation is very simple and convenient. It is also possible to suspend the workpieces that were processed at that time, jump the processing and insert the rush, and then automatically return to the breakpoint recovery processing = 3 the development trend of the EDM machine. The common technology and the latest, at the 001 show, attention to high-speed milling will replace the shock wave of the EDM machine seems to have been a thing of the past. Swiss Archie Company launched its new model in the United States, and Dingfeng’s 0-person machine, known for its high-speed milling, introduced a full range of machines, indicating that high-speed milling has not stopped the development of EDM machines. And, in contrast, the use of high-speed milling of electrodes has become a hot spot in the market. In the past five years, the call spark forming process has made great progress in the research of large-scale precision and fine technology in deep and narrow grooves.
3.1 EDM machine development trend and common technology EDM processing due to complex process, wide application, it seems to be quiet, in fact, is impeting a new development climax. In the past ten years. At the stage of rectification and storage and storage, the technology of each family is like a hundred seas, and the integration of each other is very obvious. Mainly as the process database +, is the number of standards, plus. However, it is not difficult to increase the number of sets of parameters by a few hundred sets of tribute. It is more difficult to classify according to the requirements. The practical boundary conditions are added clearly, and the number does not have a pulse number. And it covers all the progress of the pulse source related to the addition of 1. For the line with no +, the pulse energy is not only used to etch the metal, but also can be used as a cleaning and pulverizing short-circuit bridge. In short, it is called intelligent pulse source.
The random phenomenon of EDM is much more than wire cutting, and the gap detection and real-time adaptation are much more complicated. The multi-parameter detection and multi-measure countermeasures not only solve the safe and efficient processing, but also take a successful step in controlling the degree of concentrated discharge and thus obtaining the uniform surface flatness control. The weight of this expert system in basic experimental work may be more important than computational and data processing techniques.
Whether there is any intercommunication in the translational mode, the dimensional constant velocity and multiple translations are related to the shape of the electrode, which can ensure the clear space of the free space, and the translation of the spherical surface in any direction in the direction of the space. universal.
Sakamoto Sadick has adopted linear motor drives on electric machine tools. In recent years, it has been mainly focused on achieving scale and mass production so that it can be successfully carried out. It also has to do a lot of work in coordinating the various components and providing more suitable processing parameters for the user, and the activation of the electric motor technology by the linear motor will take some time to be realized. The work is difficult and the future is promising.
Foreign EDM machines are used in parts processing, and the processing of micro-dimensional shapes is more special. Today, EDM milling technology for small cavities and micro-cavities has matured, as long as the micro-mechanical market starts, Dagong 4 can introduce new varieties of EDM milling machine = 3.2 High-speed performance of forming machine After the development of linear motor forming machine by Japan Sodick Company, the high-speed processing wave of deep and narrow groove, Swiss Charmilles began to use narrow adaptive processing to make narrow groove processing. Efficiency should be doubled. This time on the stand 10, with graphite electrode processing time 5.5 than the copper electrode 8.51 Japanese Makino company's high-speed lifting knife on the small-size machine tool reached 10. The big hard machine is 2 is the original servo servo motive violation potential and improve the motor It is not easy to increase the speed range by 35 times on the basis of the voltage and the low speed characteristics. Also pay special attention to the acceleration and deceleration curve in the lifting knife. For different electrode weights and areas, the lift speed and acceleration are 圮+1柞. For this reason, the molding machine of Ryoden Electric Co., Ltd. can also detect the load at the moment of lifting the tool, and the deformation of the machine tool can be twisted within the range allowed by the machining accuracy. The inertial force generated by acceleration and deceleration plus the large hydraulic reaction force of the pumping effect of the electrode in the cavity can reach several tons on the mainframe. To this end, Japan's Sodick Company still uses the traditional spindle on the mainframe, and a small linear motor with a stroke of 1501 is installed inside the large spindle head to machine narrow grooves on large molds.
3.3 Mixed powder processing technology Wave processing has been stabilized in the market compared with water solvent EDM milling, which may be related to the fact that the Japanese mold industry emphasizes polishing work and spends less time on finishing. Mixing processing can greatly reduce the number of polishing man-hours or eliminate the need for polishing, thus shortening the delivery time. This is very important for the Japanese mold industry, which is very sensitive to the delivery date. Of course, the use of high-speed milling can also achieve the degree of no polishing, but in addition to the cost factor, in most cases, the deep cavity of the clear angle narrow hole is difficult to solve, and the large area of ​​the tool is used to mill the light without leaving the knife trace. Not easy, such as mold hardness of 45, above, the tool life is still 121 is more difficult.
Therefore, the use of high-speed milling to keep a small margin of 5, using only an electrode, using mixed powder processing to remove the knife marks, to complete the shape of the requirements to meet the requirements, may be on the application surface, economically, also in the construction period can be polished It is not easy to shape an injection mold with a large size. Does not include high dimensional accuracy. The die-casting shuttle and the injection mold mixing powder processing technology with small gaps have also grown very much in recent years, and the degree of commercialization has been greatly improved. Different formulations are used to meet different process requirements. The milk of the rhombic motor is easy to polish, the silicon powder concentration is 0.581, the service life 2001 milk 2 can be done without polishing, the silicon powder concentration is 208, the service life is 201, and the Makino series machine also has 01 and 2, the concentration is 12, the life is 200400, it also added a magnetic chip processor in the working fluid system, and used the method of measuring the surface tension to control the concentration of the mixed powder. After reaching the service life, it used the paper core to filter the concentrated powder to handle the new 3.4 EDM machine. The structure is very characteristic. 2. The bed is made of artificial granite material, the working fluid is stored in the bed, the 7-way guide rail and the centrally arranged screw are all rooted on the working fluid tank wall of the bed, 1-way guide On the bridge beam.
The 1-axis line is divided into two parts for machining the maximum workpiece size from the large electrode to 2, 18. The same size of the machine 4. It has a large process, a wide processing range and a small footprint. This is related to the structure in which it has almost no overhang. It embodies the current molding machine's desire for high rigidity.
4 EDM small hole processing machine's new dynamic precision holes are widely used in chemical fiber spinnerets and inkjet printer nozzles, especially in diameter. The small holes on the left and right are more advantageous with EDM. The Japanese Makino company uses a small hole with a spark of 0.033. The workpiece is made of cemented carbide, thickness is 0071. Processing time 3. Electrode turning time 91. The micro-adhesive power supply 14 is installed next to the main shaft, and the cable is short. It is also a high-speed small hole machine of Makino. It can be used with 10.1 copper-tungsten alloy tube electrode. It is made by precision positioning on both ends and processed on 10 and thick plates. 13 threaded holes.
The fuel nozzle EDM machine that has been disappearing for ten years has attracted the interest of the audience with newer technology on the stand. This is produced in Switzerland. The speed is increased by the batch precision hole, it and the original Gone. 1 company technology. The small point is that the one-pole entrance is smaller than the outlet, which makes the spray quality better. The requirement is not to use a high-voltage pulse when penetrating, but to use the yaw of the lower end of the wire. Moreover, the rotating electrode wire makes the electrode rotate more evenly, and the processing hole is more round and lighter. The chip removal is good and the machining depth is even worse. It processes the nozzle hole of 10.12 wall thickness 1 and can reach the processing time of day 83, 3, 8.
5 Domestically produced EDM machines Most of the EDM machines produced in China are fast wire cutting machines and manual 屯 spark forming machines. The CNC machine is supplied by a small number of joint ventures into a 4-industry company, and is a low-end product. Since China has not yet entered Jia 10, the real hot competition scene has not appeared, and the demand for quality grades in the mold market has not yet become a reality. Therefore, the decentralized low-water production of fast wire machine and manual machine will continue to be launched in the market. It will be under the front of technological innovation and scale operation, and the funds will be reorganized to form a small giant enterprise, and then it will have the strength to develop its own development. Dagong (4) outside the rules and technology is difficult to intervene. China can use technology introduction and cooperation to be closer to users, and development will be faster. The CNC machine has a north at this exhibition! Achi, Mill Company replaced the original 1 1 low-speed wire with a knife and a few pieces of material, the operation interface is better, CNC and pulse power are combined in a cabinet, the price is reduced.
North Zigaowei Yuanda Company took advantage of the hand 1 to develop the singular water-axis single-axis CNC spark machine. The company has formed a 32.25 series of low-speed wire cutting machines.
6 perceptions and suggestions Now we can't wait for the situation to improve, we must take the initiative to do something, 12001 CNC system exhibits look and feel Li Guite Beijing Machine Tool Research Institute main system characteristics, but also analyze the stepper motor economic CNC system in China The reason for the continued existence When the China International Exhibition Center kicked off, people entered the exhibition hall and were deeply attracted by the exhibits. So many exhibits came to your eyes, which made people feel like the spring breeze. The pear blossoms.
More than 1,000 machine tool manufacturers exhibited their products. All 15 exhibition halls are full. The exhibition area is about 70,000 square meters, which is equivalent to 17 football fields. A total of 9,3 machine tools are prepared, including 412 sets of CNC cutting machine tools. There are more than 50 exhibitors in the CNC system including servo motor drive sensors. World-renowned brands include FANUC Siemens Heidehan Linganfa, and domestic exhibitors include Huazhong CNC Beijing Aerospace Machine Tool CNC Group Beijing Kai Endi Beijing Kaiqi Shenyang Lantian Guangzhou CNC Nanjing Xinfang reached Duguangtai. Not only the exhibition of separate systems, but also the system and CNC machine tools are on display, bringing together the finest manufacturers of the world's major CNC systems, and exhibiting the current trend of CNC technology development, showing the prosperity and prosperity of the CNC system market. One side of the weeping, 2001 number of system features of the city.
1 Adapt to the development of processing technology, with high-precision and high-speed function, high-speed machining is the most important goal of machining, and it is work.
Trying to make foreign investors eager to fight the favorable situation in the Chinese market. In the technology-for-market and consumer protection laws, Chinese users should have sufficient right to know. It is mandatory to have a sample of Chinese machines sold in the Chinese market. The manual and the Chinese screen must have a real pre-sales consultation with 1 training and 1 maintenance service, which objectively lays a good foundation for the construction of China's electric machine tool market, and makes a large number of talents who can use advanced machine tools as much as possible. A kind of channel, introducing foreign advanced technology and the current gold market, the fastest growing technology in cutting and processing, to achieve mechanical plus one. This is a 1 indicator from the functional analysis of the number of pull system technology. An example is the ultra-small CNC system 18 River 6 exhibited by Beijing FANUC. The part, including all control modules, is only 6 thick; its printed board is mounted behind the LCD panel. The use of 3 super-speed serial bus and 10 systems greatly simplifies the connection; the use of Ethernet communication is a standard function of the system, the system can also be connected to different types of fieldbus 3,1, he 1 state; 1 The tip high-speed function is reflected in the multi-block pre-interpolation before 1 interpolation. It can read 40 segments in advance, and can also be expanded when needed; pre-interpolation acceleration/deceleration control function through pre-read control; 2 block overlap control function to achieve smooth speed control; 3 moving corner deceleration, clamping acceleration speed The position control function can realize the processing of the step surface with the step height 1, and the shape angular angle 4 is used in the service drawing. Actually, the performance of the servo motor is improved, and the servo loop is improved while avoiding the resonance of the machine tool. The precision of the machined surface is achieved.
5 In the servo loop, add feedforward control to reduce servo error. At the same time as the exhibition 18, the system, Beijing FANUC also exhibited the high-speed field information of the drilling center of Taifa, such as the factory private performance system, but it is necessary to avoid copying the license to foreign businessmen when the obligation to publicize member. Because of the different national conditions, perhaps something that is used very well abroad, we can’t use it until we don’t.
Since the information of Chinese users is not well-informed, it is very important to organize the expert group with good business quality in the bidding procurement.
Editor Fu Steel received date 2001
The screenless hammer mill uses air flow to separate small particles from larger ones. It is designed to be more reliable, and is also claimed to be much cheaper and more energy efficient than regular hammermills. The design & structure of the hammermill is always determined by the end use.