φ98卡环啮合过程力学行为的数值模拟

Numerical simulation on mechanical behavior of φ98 type shuttle at the period of joggle happening

提出了卡环制造过程中搭叠长度的确定方法,根据卡环的精度和啮合力要求,设计了由粗到精,再由精到粗,最后由粗到精的迂回制造工艺。对啮合工序进行力学分析,提出了端点弹性极限位移、搭叠长度和啮合力计算模型;开发了卡环制造辅助工艺系统———Shuttle,对卡环啮合工序进行了模拟,并结合实验讨论了端点弹性极限位移、搭叠长度和啮合力的影响。研究表明,当卡环的径高比从38.0增加到52.0,卡环接口端点弹性极限位移从2.5mm非线性增加到3.6mm。98卡环的弯曲后搭叠长度为8.0mm^10.0mm。当截面惯性矩从8.8mm4增加到20.0mm4时,卡环啮合力从20.5N非线性增加到40.8N。

The purpose of this study is to present a method for determining the length covered of shuttle during its manufacture. Accord to the demands about accuracy and jointing force to shuttle, a special process routine： from low to high, then from high to low, finally, from low to high accuracy again, was designed. By discussing the joggle process on Mechanics, the elastic limit displacement of the end point of cut, the length covered and the joggle force were modeled. A computer assistant manufacturing system named as Shuttle was developed and applied in simulating the joggle process of shuttle Finally, the effects from such factors as the elastic limit displacement of the end of cut, the length covered and the joggle force were discussed as analyzing the measured and predicted. The result shows that when the ratio of diameter and height of shuttle are applied to from 38. 0 to 52.0, the elastic limit displacement of the end of cut rises unlinearly from 2.5mm to 3.6mm Then, the length covered of shuttle is 8. 0-10.0mm In addition, as the inertia square of the shuttle＇s section is set from 8.8mm^4 to 20. 0mm^4 , the joggle force of shuttle increases unlinearly from 20. 5N to 40.8N.