1.设备选择要合理。粗机械零件加工主要是切断了大多数的机械加工余量,不需要高精密机械零件加工,所以粗加工应该更大的权力和高精度的机床,完成过程坚持使用一个相对较高的精密机器。粗糙和精加工在不同的机器上,可以充分发挥设备能力,可以延长其使用寿命精密机床。

2.精密零件加工厂为了保证精密零件加工精度,粗和细机械零件加工分别从比较好的。因为当粗机械零件加工,切削量大,工件的切削力、夹紧力、热、机械零件加工表面有明显的加工硬化现象,工件在较大的内应力,如果粗糙,粗糙的机械零件加工完成后连续,零件精度将很快失去了由于应力重分布。对于一些高精密零件的机械零部件的加工。在粗加工和精加工后,还应安排或时效处理低温退火过程,消除内部应力。

3.在精密零件加工工艺路线,经常安排热处理过程。地点安排如下:热处理过程,改善其切削加工性能的金属,如退火、正火、回火、一般安排在机械零件加工。消除内部应力,如时效处理,调节治疗,如总布置图,粗加工后,但在完成。为了提高机械性能的部件,如渗碳淬火和回火,一般安排在机械零件加工。如热处理后变形大,但也要安排比较后的加工过程。

1. Equipment selection should be reasonable. Rough machine parts processing mainly cuts off most of the machining allowance, does not need high precision machine parts processing, so rough processing should have greater power and high precision machine, complete the process adhere to the use of a relatively high precision machine. Roughness and finish machining can give full play to the ability of equipment and prolong the service life of precision machine tools on different machines.

2. In order to ensure the precision of precision parts, the processing of rough and fine parts is the best. Because when rough mechanical parts are machined, the cutting force, clamping force, heat and machined surface of the workpiece have obvious hardening phenomenon. The workpiece has larger internal stress. If rough and rough mechanical parts are machined continuously, the accuracy of the workpiece will soon lose due to stress redistribution. For some high precision parts of the mechanical parts processing. After roughing and finishing, low temperature annealing should be arranged or aged to eliminate internal stress.

3. Heat treatment process is often arranged in the process route of precision parts. Location arrangement is as follows: heat treatment process to improve the cutting performance of metals, such as annealing, normalizing, tempering, generally arranged in the processing of mechanical parts. Eliminate internal stress, such as aging treatment, adjust treatment, such as general layout, rough processing, but after completion. In order to improve the mechanical properties of parts, such as carburizing, quenching and tempering, generally arranged in the processing of mechanical parts. If the deformation is large after heat treatment, the final processing process should also be arranged.