Metal mold processing method

The main goal of hardware die roughing is to pursue the material removal rate per unit time, and to prepare the geometric outline of the workpiece for semi-finishing. In the cutting process, the metal area of ​​the cutting layer changes, causing the load on the hardware tool to change, causing the cutting process to be unstable, the wear speed of the hardware tool being uneven, and the quality of the machining surface to be reduced.

Many CAM softwares currently developed can maintain a constant cutting condition by the following measures, thereby obtaining good processing quality. Constant cutting load. By calculating the constant cutting area and material removal rate, the cutting load and the tool wear rate are kept in balance to improve the tool life and processing quality. Avoid sudden changes in the tool feed direction. Avoid burying the tool in the workpiece. Such as the processing of mold cavity, the tool should be avoided vertical insertion into the workpiece, but should use the tilt down knife way, it is best to use a spiral knife to reduce the tool load; mold core processing should be as far as possible from the workpiece outside the knife and then horizontal Cut into the workpiece. Therefore, the semi-finishing strategy should be optimized to ensure a uniform residual machining allowance on the workpiece surface after semi-finishing.

The optimization process includes calculation of the rough-processed contour, calculation of the maximum remaining machining allowance, determination of the maximum allowable machining allowance, and partitioning of the model for which the remaining machining allowance is greater than the maximum allowable machining allowance. If the remaining machining allowance value in the local milling operation is used as the remaining machining allowance in the semi-finishing, this process can not only remove the corners that are not cut by rough machining, but also complete semi-finishing.