1) The cavity and shape of the parts should adopt uniform geometric types and sizes. This can reduce tool specifications and the number of tool changes, facilitate programming, and improve production efficiency.
2) The size of the inner groove fillet determines the size of the tool diameter, so the radius of the inner groove fillet should not be too small. The manufacturability of the part is related to the height of the machining profile and the size of the transition arc radius.
3) When milling the bottom surface of the part, the radius r of the groove bottom fillet should not be too large.
4) A unified reference positioning should be adopted. In CNC machining, if there is no unified reference positioning, the contour position and size of the two surfaces after processing will be inconsistent due to the reinstallation of the workpiece. Therefore, in order to avoid the above problems and ensure the accuracy of the relative position after the two clamping processes, a unified reference positioning should be used.
It is best to have suitable holes on the part as positioning reference holes. If not, please set the process hole as a positioning reference hole (such as adding a process lug on the blank or setting a process hole on the allowance to be milled in a subsequent operation). If it is impossible to make process holes, at least the surface of the finished product should be used as a unified reference to reduce errors caused by secondary clamping. In addition, it should also be analyzed whether the required machining accuracy and dimensional tolerances of the parts can be guaranteed, and whether there are redundant dimensions that cause conflicts or closed dimensions that affect the process arrangement.
