What Is A Slow-walking Wire Cutting Machine?

Low-speed wire cutting electromechanical wire with copper wire as a tool electrode, generally at a speed of less than 0.2m/s for one-way movement, copper wire and copper, steel or super-hard alloy and other processed materials between the application of 60 to 300V pulse voltage, and maintain a gap of 5 to 50um, the gap is full of disengaged subwater (close to Distilled water) and other insulating media, so that the electrode and the processed material between the spark discharge, and each other is consumed, corrosion, on the surface of the work piece electrocution out of countless small pits, through NC-controlled monitoring and control, servo implementation, so that this discharge phenomenon is uniform, so as to achieve the processing material is processed, making it a required size and shape accuracy of the product. At present, the accuracy can reach 0.001mm class, the surface quality is also close to the grinding level. Electrode wire discharge is no longer used, and the use of resistance-free anti-electrolyte power supply, generally with automatic wire wear and constant stress device. Smooth work, uniform, small jitter, high processing accuracy, good surface quality, but not suitable for processing large thickness work parts. Due to the high structure of the machine tool, high technical content, high machine tool prices, so the cost of use is also high. One-way wire electric spark wire cutting machine tools in the early days only foreign companies of the only organic species. Taiwan's low-speed wire-walking spark wire cutting machine started late, but the past few years have developed rapidly. One of its key initiatives is to be jointly funded by a number of home appliance processing machine tool manufacturers, with the support of the relevant departments to a certain degree, by the Taiwan Institute of Industrial Technology invested a lot of manpower and material resources to do the development of key technologies. After more than 10 years of research, in the control system and power supply and other key technologies have made a breakthrough. Taiwan enterprises manufacturing low-speed wire spark wire cutting machine should now belong to the scope of mid-range machine, nearly 3 years to reach 20% to 30% annual growth rate, estimated that in the next 5 years, Taiwan low-speed wire spark wire cutting machine annual output of 2000 units, can account for more than 25% of the world market. Low-speed wire spark wire cutting machine high technical content, good market prospects, you can get a higher return, is the electrical processing industry manufacturers of the "must compete", "strategic highland." It can also be said that who has mastered the low-speed wire spark wire cutting machine technology, who has won the next step of enterprise development and growth opportunities. In order to seize the Chinese market, Japan, Switzerland, Taiwan's electrical machine tool manufacturers in Chinese mainland plant to produce such machine tools. China's science and technology workers in the Ministry of Science and Technology special fund support, invested in a larger research and development force, has completed a new generation of low-speed wire spark wire cutting machine research and development, has made a major breakthrough, now has its own intellectual property rights products, and occupied a certain market share, its performance indicators up to the mid-range machine level. At present, there are some domestic enterprises are hoping to develop low-speed silk spark wire cutting and processing technology through cooperation with Taiwan-related enterprises.

Compared with the one-way low-speed wire electric spark wire cutting machine, there is still a big gap in the average productivity, cutting accuracy and surface roughness of the reverb high-speed wire electric spark wire cutting machine. In response to these gaps, at the beginning of this century, several domestic high-speed re-walking wire spark wire cutting machine manufacturers to achieve a number of high-speed wire machine cutting processing (this type of machine is commonly known as "walking wire" Medium Speed Wire Cut Electrical Discharge Machining). The so-called "middle walk wire" does not mean that the walking wire speed is between high speed and low speed, but the composite walk wire cutting machine tool, its silk walking principle is in roughing using 8-12m/s high-speed walk wire, finishing using 1-3 m/s low-speed filament, so that the work is relatively smooth, small jitter, and through multiple cuts to reduce material deformation and filament loss brought about by the error, so that the processing quality is also relatively improved, processing quality can be between high-speed wire-walking machine and low-speed wire machine. Therefore, it can be said that the user called "walking wire", in fact, the re-walking wire spark wire cutting machine borrowed from some low-speed wire-walking machine processing technology, and achieved stripe-free cutting and multiple cuts. After several years of development, almost all of the domestic production of high-speed wire electric spark wire cutting machine tools in the production and sales of wire, but ultimately showed that not all of the re-walking wire spark wire cutting machine can be cut many times, or not all of the re-walking wire electric spark wire cutting machine using multiple cutting technology can get good process results. Multiple cutting is a comprehensive technology, it involves the machine tool nuncies control accuracy, pulse power supply, process database, tracer system, working fluid and a large number of process problems, not simply in the high-speed wire machine plus a set of wire frequency control system can be achieved, only those manufacturing accuracy is high, and in all aspects to create multiple cutting conditions of the recidive wire electric spark wire cutting machine can be cut multiple times and stripeless cutting, and obtain significant process results. Therefore, our production enterprises must pay full attention to this problem, we must do according to the system engineering, really put this technology to good use, this product to do a good job. If there are some enterprises in order to further improve the accuracy of the machine body, X, Y coordinate workbench using DC or AC servo motor as a drive unit to directly drive the ball screw, while using a full closed-loop control with pitch compensation function, you can use the CNC system to compensate for and correct the positioning accuracy error of the machine tool. Under the premise of ensuring accuracy, the processing accuracy of long-term use is reduced and the service life of the machine is extended. Special (most diamond) electrode wire maintainers are used in the wire transport system to maintain the relative stability of the electrode wire and reduce the change in the pressure of the electrode wire during processing. The cooling system changes the commonly used extensive cooling method, adopts multi-stage filtration and controls key parameters such as dielecter constants to ensure the smooth progress of finishing. The control software provides an open database of processing parameters, which can be selected according to the material's texture, thickness, roughness and other conditions. I believe that through our efforts, many cutting technology will be more perfect, the re-walking wire spark wire cutting processing technology will also be better applied and developed. 

After using multiple cutting techniques, although the processing quality has improved significantly, but it still belongs to the category of high-speed wire spark wire cutting machine, cutting accuracy and finish still have a large gap with low-speed wire cutting machine, and accuracy and finish of the maintainability also need to be further improved. "Middle walk wire machine" has the characteristics of simple structure, low cost and low consumption, so there is room for its survival, the current implementation of the standard is still high-speed wire machine related standards, so the production enterprises in the user's publicity should pay attention to, we must be realistic.