Machining process and die for injection piston body

The invention relates to the field of mechanical forging, and discloses a machining process and die for an injection piston body. The machining process comprises the following steps of a, material preparing; b, heating; c, die forging; d, rough machining; e, subsequent heat treatment; and f, finish machining. A piston and a piston rod are integrally forged as a whole and then are machined, the brand-new machining mode can avoid the problem that the machining cost is too high due to losses of a base material, and therefore, the economical efficiency is improved, fit clearances caused by independent turning machining can be completely eliminated, and the overall stability performance is improved. 本发明涉及机械锻造领域，公开了一种注射活塞体的加工工艺及模具，包括以下步骤：a、备料；b、加热；c、模锻；d、粗加工；e、后续热处理；f、精加工。活塞和活塞杆作为一个整体一体锻造而成后再进行加工，这种全新的加工方式不仅可以避免由于基材的损耗造成的加工成本过高问题，从而提高其经济性，还能够杜绝由单独车削加工时带来的配合间隙，从而提高整体的稳定性能。