CNC milling machine processing often encounter many parts need surface processing treatment, in the surface processing will also have high precision requirements. High-precision processing often requires multiple processes on the surface to improve the surface smoothness. Therefore, before arranging the process must capture the surface high-precision processing main process.
CNC milling machine processing center needs to arrange the process and processing stage division reasonably, the necessary principle of rough first and then fine, first surface and then hole.
1、Rough machining stage
In the machining process of engine block, arrange roughing process to rough the blank comprehensively and cut off most of the residual to ensure production efficiency.
2、Semi-finishing stage
In the engine block machining, in order to ensure the machining accuracy of some important surfaces, arrange some semi-finishing processes, the accuracy and surface roughness requirements of some medium surface machining is completed, and the requirements of high surface semi-finishing machining, for the future preparation of finishing.
3、Finishing stage
The surface with high requirements for precision and surface roughness is processed.
4、The processing of minor small surfaces
Such as threaded holes, CNC milling machine machining center can be carried out after finishing the main surface, on the one hand, the processing of the workpiece deformation does not affect much, while the scrap rate is also reduced; in addition, if the main surface out of scrap, these small surfaces do not need to be processed, thus avoiding wasted man-hours. However, if the processing of the small surface is easy to touch the main surface, it should be placed on the small surface processing before the main surface finishing.
5, auxiliary processes should also be properly arranged
Such as the inspection process, after the roughing stage of the parts, key processes before and after processing, after the parts are all processed, should be properly arranged. CNC milling machine machining center on the processing stage division, has the following benefits: First, you can take measures to eliminate internal stresses in the workpiece after rough machining to ensure accuracy; Second, finishing in the back, not to damage the workpiece in the process of transport of their own processing surface; Again, first rough machining of each side, you can find early defects in the blank and timely processing, will not waste time. But for the general small workpiece should not be divided into very fine.