多台阶轴头短流程冷精锻成形工艺

Short process of multi-step spindle head in cold precision forging

针对某型号多台阶轴头形状尺寸及冷精锻工艺特点,采取挤压、镦粗、缩径等不同工艺在工序内结合应用的方法,制定了多台阶轴头短流程冷精锻成形工艺。通过数值模拟和实验研究相结合的方法,对所制定的工艺进行分析研究,最终获得了两道工序成形8个台阶尺寸的多台阶轴头短流程冷精锻成形工艺,并在实验过程中采用了高分子润滑剂,进一步缩短了从下料到最终成形的整个工艺流程。结果表明:通过合理分配各工序变形量、工序内多种冷锻工艺结合应用的方法,可有效减少台阶轴冷精锻成形工序总数,实现在普通压力机上的高效率生产;Deform-3D模拟软件对工艺的模拟结果与实验结果相一致,说明有限元模拟对成形效果、压力大小的预测是可行的。

For the characteristics of shape size and eold preeision forging process of a certain type of muhi-step spindle head, a cold precision forging proeess with short flow was worked out by combining different coht forging processes such as extrusion, upsetting and ironing in one step. Then, the process was analyzed and studied by comparing numerical simulation with experimental study, and finally the eold precision forging process with short flow for multi-step spindle head with two-step forming and eight-step size was obtained. Furthermore, the high polymer lubricant was used to further shorten the whole process flow from the billet to final forming. Results show that the total numbers of cold forging forming process of multi-step spindle head are reduced effectively by a reasonable arrangement on deformation values of every proeess and combined application of different cold forging processes in one step, and as a result, high efficiency production is achieved with common press. Thus, the simulation results of the Deform-3D are consistent with the experimental results, and it shows that the finite element simulation is feasible to predict the forming effect and the pressure size.