锻压技术

一种提高长轴类转向节锻件材料利用率的组合模具

英文标题：A kind of combined mold on improving material utilization rate for long shaft steering knuckle forgings

分类号：TG31

出版年,卷(期):页码：2022,47(8):185-192

摘要：

针对立式锻造工艺成形长轴类转向节锻件时存在的锻件轴部充填困难、材料利用率低等问题，以某长轴转向节锻件为例，提出了一种新的组合模具，该模具中的镦粗工序对坯料进行预分料，使镦粗后的坯料投影全部落在制坯模具型腔内；制坯、预锻模具采用阻力墙组合结构，提高坯料轴部的充填能力；制坯、终锻模具设计定位结构，提高坯料的定位准确性。并结合数值模拟仿真分析技术，模拟并分析了新组合模具的成形性能，最后通过生产试验验证了新组合模具的可行性。结果表明：采用新的组合模具，下料重量由原来的47.7 kg减小至42.9 kg，材料利用率达到了91%，较优化前的模具结构提高了8%。

Aiming at the problems of difficult filling in the shaft of forgings and low material utilization rate in the vertical forging process for long shaft steering knuckle forgings, for a long shaft steering knuckle forgings, a new combined mold was proposed. In this mold，the billet was pre-separated in the upsetting process so that the projection of billet after upsetting fell into the cavity of billet-making mold, the billet-making and pre-forging molds adept a combined structure of resistance wall to improve the filling capacity of billet shaft, and the positioning structure of billet-making and final forging molds was designed to improve the positioning accuracy of billet. Combined with numerical simulation analysis technology, the forming performance of the new combined mold was simulated and analyzed, and the production test verified the feasibility of the new combined mold. The results show that the material weight is reduced from 47.7 kg to 42.9 kg by using the new combined mold, and the material utilization rate reaches 91%, which is 8% higher than the mold structure before optimization.

基金项目：

国家自然科学基金资助项目（52075058）

作者简介：陈天赋（1976-），男，学士，高级工程师，E-mail：13871600196@139.com；通信作者：彭海军（1992-），男，硕士，助理工程师，E-mail：1342550938@qq.com

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