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.

Newspapers in Chinese (Simplified)

Newspapers from China