Linear Motor
At present, most of the high-speed machining centers used in mold processing use servo motors and ball screws to drive linear coordinate axes. However, some machining centers have adopted linear motors. This linear drive eliminates the need to convert rotary motion into linear motion. Components, which can significantly improve the dynamic performance, moving speed and machining accuracy of the shaft.
Machines driven by linear motors can significantly increase productivity. For example, when processing electrodes for electrical discharge machining, the processing time is reduced by 50% compared to the conventional high-speed milling machine.
Linear motors can significantly improve the dynamic performance of high-speed machine tools. Since the mold is mostly a three-dimensional surface, the tool axis is continuously braked and accelerated while the tool is machining the surface. Only with a high axial acceleration is it possible to ensure that a given profile is fed with a constant feed per tooth on a shorter path path at very high track speeds. If the radius of curvature of the surface profile is smaller, the higher the feed rate, the higher the required axial acceleration. Therefore, the axial acceleration of the machine tool largely affects the machining accuracy of the mold and the durability of the tool.
