High-efficiency internal grinding machine for bearings, the international standard for single-piece efficiency is 8~10s, and the internal design index of 3MZ204CNC grinding machine is 10s. The time allocation of each step, especially the auxiliary time should be compressed as much as possible. Therefore, the loading and unloading mechanism of the self-dropping pusher can keep the loading and unloading time at about 0.5s. The insertion of the measuring head can also be completed in 0.5 s. Adaptive control technology is also used to reliably eliminate grinding dead ends.
The overall layout of the automatic internal grinding machine is designed to achieve continuous normal internal grinding, the required cutting motion and auxiliary motion. The design of the sports program essentially determines the choice of the overall layout of the machine tool. The machine bed adopts a rectangular box casting structure which is advantageous in structural rigidity and design. The movement uses the motion of a general internal grinding machine, including workpiece rotation, grinding wheel rotation, workpiece feed compensation and wheel dressing compensation movement.
Grinding cycle design The grinding cycle of the modern bearing internal grinding machine contains two stages of coarse grinding and fine grinding, and is equipped with corresponding non-feed grinding, step conversion in the grinding stage, and instructions are issued by the active measuring instrument. There are three main differences between the grinding cycles of different grinding machines. Free-running grinding and its elimination method The Heald CF series internal grinding machine in the United States eliminates the idle grinding by the control force feed. The grinding wheel quickly approaches the workpiece until the grinding wheel and the workpiece generate sufficient contact pressure and automatically converts to coarse grinding feed. Japan's TOYO company's T-107 internal grinding machine is equipped with TAC adaptive control system. When the grinding wheel approaches the workpiece quickly, it will increase the power of the grinding head motor. When it reaches a preset ratio, it will automatically convert to black skin grinding. speed. The 3MZ204 grinding machine uses adaptive control to eliminate the grinding dead space.
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