Automobile Technology & Material
A Top-down Design Method of RPS for Irregular Stamping Parts
Zhao Zhenzhou, Liu Yongchao, Jia Tongru, Sun Zheng
(China FAW Group Corporation, Changchun 130000) Abstract:in order to improve the ability of top- down design for stamping parts, the paper, by analyzing the stable supporting condition of rigid body, proposes a method to analyze the rationality of RPS of irregular stamping parts during the product development phase based on barycenter projection point. The stability simulation of a roof reinforcement beam is conducted by using ADAMS to verify the application effect of barycenter projection point in the development of RPS of irregular stamping parts. The simulation results verify the feasibility of applying barycenter projection method in developing the RPS of irregular stamping parts.
Key words: Stamping part, RPS, Barycenter projection point, Simulation
1 前言
通常车身冲压件的加工基准(RPS)采用3(N)2-1
准则,即在冲压件的主投影平面(投影面积最
3
大)方向上选择 个(或N个)定位面和主副定位孔
6
[1-3]。冲压件加
限制冲压件在空间中的 个自由度
工基准(RPS)的定位方向要符合测量支架和检验
夹具的装夹工艺要求,保证冲压件或白车身分总成和部分白车身可以正确的装夹在测量支架和检
验夹具上做检测。在异形冲压件加工基准(RPS)
的开发过程中,很难准确地判断定位面是否能够有效地克服重力产生的倾覆力。当加工基准
(RPS)设计不合理时,冲压件在按照整车坐标系放
置于检具上会向一侧倾倒,自由状态无法评价,导致尺寸检测数据失真,失去评价意义。为了降低车身异形冲压件加工基准的开发难
1
度,提出 种利用重心投影点设计异形冲压件加工基准的方法,引入稳定裕度作为冲压件定位稳定性的评价指标。最后,通过仿真验证了重心投影法应用于冲压件加工基准设计的可行性。
2 稳定条件分析
假设某零件为刚体,支撑点与刚体之间的摩3擦力无限大。理论上,刚体零件可在空间 个支撑
作者简介:赵振洲(1987—),男,工程师,学士学位,研究方向为匹配技术。
参考文献引用格式:
赵振洲,刘永超,贾通儒,等. 异形冲压件加工基准正向设计方法[J].汽车工艺与材料,2021(6):33-37.
ZHAO Z, LIU Y, JIA T, et al. A Top-down Design Method of RPS for Irregular Stamping Parts [J]. Automobile Technology & Material, 2021(6): 3337.