发动机连杆热锻模具结构分析及优化设计

目的以1KD发动机连杆的热锻模具为研究对象,对其进行结构分析和优化设计。方法采用DEFORM3D模拟1KD连杆热锻成形过程,重点关注与模膛布局相关的中心飞边仓深度、模膛的中心距和旋转角度等3个参数,对成形载荷、锻件折叠和模具磨损的影响。结果采用两次预锻加终锻的生产工艺,可以达到分配坯料质量、降低载荷的目的;模膛中心距和模膛旋转角是影响成形载荷的主要因素,而中心飞边仓深度对模具磨损有显著的影响。结论最终获得了3个参数的优化组合:模膛中心距为32 mm,模膛旋转角为12°,中心飞边仓深度为10 mm,对模具设计和实际生产有一定的参考价值。

Die Structural Analysis and Design Optimization of Engine Conrods

Objective In this paper, forging die of 1KD engine conrods was chosen as the study object, for which structural analysis and design optimization were performed. Methods Simulation of 1KD conrods hot forging process was carried out by using DEFORM 3D, focusing on the effects of the three parameters associated with the cavity layout: the center flash groove depth, die cavity centre distance and rotation angle on the forming load, folding and forging die wear. Results The purpose of allocating blank quality and reducing the load could be achieved by using the production processes with two preforgings and final forging. Die cavity centre distance and rotation angle were the main factors affecting the forming load,and the center flash groove depth significantly influenced the tool wear. Conclusion Eventually the optimal combination of three parameters was obtained: the die cavity centre distance, rotation angle and the center flash groove depth were 32 mm,12^o and 10 mm, respectively, which has a certain reference value for the mold design and actual production.