1. Reasonable selection of equipment. The machining of precision mold parts mainly cuts off most of the machining allowance, and does not require machining of high-precision mechanical parts, so the rough machining should be a machine tool with greater power and high precision, and the completion process insists on using a relatively high-precision machine. Roughing and finishing are performed on different machines, which can give full play to the capabilities of the equipment and prolong the service life of precision machine tools.
2, In order to ensure the machining accuracy of precision mold parts, coarse and fine mechanical parts are processed separately from the best. Because when rough mechanical parts are processed, the cutting amount is large, the cutting force, clamping force, heat, and machining surface of the workpiece have obvious work hardening phenomenon, and the workpiece has a large internal stress. If rough, rough mechanical parts are processed. After continuous, part accuracy will quickly be lost due to stress redistribution. Machining of mechanical parts for some high-precision parts. After roughing and finishing, a low-temperature annealing process should also be arranged or aged to eliminate internal stress.
3. In the processing route of precision mold parts, the heat treatment process is often arranged. The locations are arranged as follows: the heat treatment process to improve the machinability of the metal, such as annealing, normalizing, and tempering, is generally arranged in the machining of mechanical parts. Relief of internal stress, such as aging treatment, conditioning treatment, such as general arrangement drawing, after rough machining, but after finishing. In order to improve the mechanical properties of the parts, such as carburizing, quenching and tempering, they are generally arranged in the machining of mechanical parts.