When it comes to high-speed milling, as long as people who are engaged in machining know more or less, "high-speed milling" has become a buzzword in today's machining industry, and it has attracted everyone's attention and pursuit, full of mystery and honor. . When it comes to EDM, few people know about it, because EDM has long been defined as special processing other than conventional machining, which is a supplementary processing of machining, and therefore limited to difficult materials and complex structures. The application of micro-processing range. But it is an indispensable process that is irreplaceable by other conventional processes. High-speed milling or electrical processing has its own advantages and disadvantages. The two processes complement each other and develop and progress under the advantages of their respective processing characteristics.
The following is an introduction to the characteristics and experience of high-speed milling and EDM in our company's application of three-axis, five-axis machining centers and EDM for many years.
Effective use of advanced technology
1. Five-axis machining center
The figure below shows a five-axis machining center driven by a linear motor.
Linear motor driven five-axis machining center
The application of linear motor improves the accuracy and efficiency of five-axis machining. The feed rate of the traditional screw drive machine is 30m/min, and the application of linear motor solves the precision, clearance and thermal deformation brought by the screw drive. The influence of life and the like greatly improves the response speed and accuracy, and the feed rate can reach 80 to 100 m/min, making the five-axis machining a big step toward precision and high speed.
With the continuous improvement of precision and rigidity of high-speed milling machines, the continuous introduction of high-speed milling tools, and the continuous advancement of tool clamping methods, control systems and software, high-speed milling will be more applicable and more popular, processing efficiency will be higher, quality will be Better, the cost will be lower, so as to meet the processing of high-precision, high-complex parts.
2. EDM technology
The figure below shows the automated production unit integrating machining center, EDM and measurement.
Automated production unit integrating machining center, EDM and measurement
The application and popularization of high-precision fixtures in EDM have laid the foundation for improving the automation of EDM. The popularization and application of 3R and EROWA fixtures has made it possible to automatically replace the electrodes and establish an electrode library system, and has developed rapidly, which reduces the dependence of the machine tool on people. In recent years, the unmanned machining unit consisting of milling, EDM, measurement and other multi-processing machine tools has been gradually applied to actual production in China. The milling and machining of workpieces and multi-station automatic operation are more in Figure 5. Machining center, EDM, and measurement integration The automated production unit exchange, as well as the milling and machining of workpieces and electrodes, electrical machining, measurement and other machine tools, have realized the automatic disassembly and assembly of the orbital robot, achieving unmanned production.
With the development of industrial manufacturing, aerospace, medical, electronics and technological advancement, micro-machining is becoming more and more refined, and the structure of workpieces is becoming more and more complex. New materials with high temperature resistance and high hardness will be more developed and applied. Conventional machining will make it difficult to complete the machining of similar workpieces, and EDM will take advantage. Through the development of various special or multi-axis CNC EDM machines, and the continuous advancement of EDM technology, EDM will be more widely used. application.
3. Process complementarity, different advantages
When formulating a machining plan, high-speed milling and EDM can be considered. First, high-speed milling is used to machine most of the material, which takes advantage of high-speed milling. For parts that cannot be machined by high-speed milling, EDM can be used. The process is completed; for the quenched workpiece, most of the material can be processed by EDM, leaving a small margin for high-speed milling and finishing, reducing the cost of high-speed milling roughing, so that the two processing techniques are in many cases To complement, you can take advantage of each other.
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