With the acceleration of the upgrading of consumer products, mold technology is also constantly developing, and higher and higher requirements are placed on the production efficiency and manufacturing quality of molds. Therefore, the low production efficiency and quality of EDM molds are unstable. The shortcomings are gradually exposed.

In order to achieve high-speed machining of the mold cavity and its related parts, the machine tool needs to have the following characteristics:

1. Since the mold is developing in the direction of large-scale, molds of several tons to several tens of tons are very common, so the machine table needs to bear a large weight, which requires the equipment to have large load-bearing and high rigidity characteristics, and must have enough The large countertop size and working stroke are adapted to it. In addition, the strength and hardness of the mold material are very high, and the mold cavity is often processed by a small-diameter end mill with a large elongation, so that the process is prone to chattering. In order to ensure the machining accuracy and surface quality of the parts, high-speed machine tools used in mold manufacturing must have high dynamic and static stiffness to improve the positioning accuracy, tracking accuracy and vibration resistance of the machine.

2. High-speed and high-power high-speed machining is the development direction, and high-speed milling has shown great advantages in mold processing. In order to adapt to the machining of the mold cavity surface, the radius of the tool should be smaller than the minimum circumferential radius of the cavity surface to avoid "interference" between the tool and the workpiece during the machining process. Due to the small diameter of the tool, the spindle speed is required to be very high. The spindle speed of foreign high-speed machining machine tools has reached 40,000 to 100,000 r/min, and the rapid feed rate can reach 30,000 to 60,000 min. The cavities and other parts of the mold parts are often finished in a single clamping of the workpiece, so the spindle power is large, and the spindle power of the medium-sized mold milling machine and machining center is often 10~40kW, and some even higher.

3. Multi-axis linkage and good deep cavity comprehensive cutting capability The mold cavity is composed of complex space six curved surfaces and grooves, and many molds have deep cavity. In order to achieve high precision, high speed and high stability processing of 3D surfaces, the machine tool needs multi-axis linkage and has a good deep hole cavity comprehensive cutting capability. A five-axis linkage machining center can be used, in addition to the linear motion of three coordinates, there are two feed motions of the rotation coordinates. The milling head or table can be used for multi-axis linkage for continuous rotary feed, which is suitable for machining mold parts with complex cavity surfaces.

It can be said that composite processing is one of the development directions of mold processing. Although the machining center has been able to combine many machining processes on one machine tool, it still cannot fully adapt to the mold processing, and combines machining with electrical, chemical, ultrasonic and other different principle processing methods, and has more than two process characteristics. The composite processing will have broad prospects in the future mold manufacturing.

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