The advantages of high speed milling mold processing technology

In high speed machining is the most commonly used processing methods in high speed milling, replace electrical discharge machining with high speed milling mold mold has the following advantages. ( 1) The processing quality well with traditional edm machining method for machining mold, the workpiece surface in the local high temperature plasma ablation process, the physical - on the surface of the workpiece material Mechanical performance will be affected by a certain damage, often in the cavity surface microcrack, difficult to guarantee the quality of workpiece machining. High speed milling of about 10 times faster than conventional milling cutting speed to machining of parts, with the blank allowance it fully instant was cut from the workpiece deformation, residual stress on the surface of the workpiece is very small. At the same time, in the process of high speed milling machine tool spindle speed is too high ( 8000 r / min ~ 100000 r / min) , 'machine tool fixture - artifacts - cutting tool technology system of vibration frequency is much higher than its inherent frequency range, no impact on the smooth parts processing process. Parts processing, therefore, high accuracy, good surface quality. After high speed milling of mold cavity, the surface quality can reach the level of the grinding, it will save the grinding process for follow-up. ( 2) High efficiency because of the edm was conducted by plasma ablation 'micro cutting, machining process is very slow, at the same time, the mold cavity surface roughness also could not reach the requirements of the mold, often after edm and time-consuming manual grinding and polishing mold, so the process efficiency is extremely low. In machining center or on high speed milling machine machining mold, the processing efficiency of the process itself is several times higher than the electrical discharge machining. At the same time, can be completed in a clamping workpiece cavity of the rough, finishing and other mold parts, machinery processing, namely the so-called 'one' technology ( 一个通过加工) 。 In addition, the technology does not need to do the electrode and the subsequent manual grinding and polishing, easy to realize the automation of machining process. Therefore, the application of high speed machining technology make the mould development has been speeded up. ( 3) Can hard parts and thin wall parts processing complicated shape by the high speed cutting mechanism, greatly reduced when high speed milling cutting force, cutting process becomes more relaxed. High speed cutting processing the material to reach more than 60 HRC hardness of quenched steel, can need not cutting fluid, the so-called hard cutting ( 硬加工) And dry cutting ( 干加工) 。 Is more outstanding, transverse cutting force in high speed milling is very small, the processing complex some fine steel in the mold cavity and thin wall ( Wall thickness is less than 1 mm) Is extremely advantageous. High speed milling processing mould, of course, also has certain limitations. When the workpiece material hardness greater than 60 HRC above, and have both narrow and deep cavity and chamfering and rounded corners very hour, high speed milling is very difficult, and adopts the combination of high speed milling and edm can achieve good economic results.