When it comes to composite machining technology, it has to be mentioned that the composite machining machine is also changed from generation to generation. In the past, the machining center was called a composite machining machine. However, due to the limited variety of tool exchange processing, and the field of cutting processing, the general machining center is no longer called a composite machining machine. Composite machine tools should have process integration capabilities and multiple process integration functions. From the perspective of the environment in which the manufacturing industry is located, the multi-tasking machine tool will always be one of the key machine tools developed, and its functions will continue to expand, and it will move toward the direction of “one machine tool becomes a small factory”.

In the crankshaft compounding machine tool, the horizontal milling and milling machining center produced by the crankshaft has a certain representativeness. The concept of “one-time loading, all completed” was put forward. The turning and milling center integrates a twin-spindle turning center, a five-axis machining center, deep hole boring, milling, drilling and three-coordinate functions. The crankshaft can be completely machined in a turning-milling machining center with two spindles. The processed crankshaft can be directly transferred to the finishing process. At present, similar composite machine tools have been introduced in China.

In the aspect of crankshaft machining, there is also a process-integrated application of workpiece rotation and grinding wheel servo linkage control technology, which can complete all journal grinding without clamping the center of rotation of the crankshaft, including follow-up tracking and grinding. Rod journal; static pressure spindle, hydrostatic guide rail, static pressure feed screw (grinding head frame) and linear grating closed-loop control, using the production system, the grinding cylinder roundness accuracy can reach 0.002mm; using CBN grinding wheel The grinding line speed is up to 120m/s, with double grinding wheel head frame, and the grinding efficiency is extremely high.