锻压技术

组合形活塞销冷镦挤成形工艺方案设计

英文标题：Process design on cold upsetting and extruding for combination piston-pin

作者：隋毅梁强

分类号：TG316

出版年,卷(期):页码：2019,44(6):97-102

摘要：

依据组合形活塞销结构特征，制定了两种多工位冷镦挤成形工艺方案，并应用DEFORM-2D软件对活塞销成形过程进行数值模拟仿真，分析比较了两种方案中金属流动规律、应力分布规律和成形力大小。模拟结果显示：采用制定的两种工艺方案成形活塞销均不会出现折叠、开裂等锻造缺陷，但“两次反挤压+挤锥”的成形工艺方案各工步成形载荷分布更合理。工艺实验结果显示，采用“两次反挤压+挤锥”生产的组合形活塞销满足设计尺寸要求、无折叠和开裂缺陷。数值模拟结果与工艺实验结果相一致，制定的工艺方案可以满足零件塑性成形的设计要求。

According to the structural characteristics of combination piston-pin, two kinds of multi-station process schemes of cold upsetting and extrusion were formulated, and the forming process of piston-pin was simulated by software DEFORM-2D. Then, the metal flow rule, stress distribution rule and forming force in two different schemes were analyzed and compared. The simulation results show that the forging defects, such as folding and crackle do not appear in the piston-pin formed by the above two process schemes, but the forming process of “twice back extrusion+cone extrusion” has a more reasonable load distribution in each step forming. The production practice shows that the combination piston-pin satisfies the requirement of design size without folding and crack by “twice back extrusion+cone extrusion”. The simulation results are consistent with the technological experiment results. Thus, the above process can meet the requirement of plastic forming of parts.

基金项目：

重庆市基础科学与前沿技术研究专项基金资助项目（cstc2017jcyjAX0175）

隋毅（1981-），男，硕士，工程师 E-mail：suiyi_1981@qq.com

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