摘要
基于零点定位技术的夹具能有效保证工作的连续性,避免过去因工序或机床切换造成的精度损失。为解决零点定位系统夹具多定位槽的过定位问题,建立了自适应补偿定位的切割槽有限元仿真优化模型。采用正交测试法分析了切割槽的主要特征参数对应力和位移影响的主次顺序,获得了最优参数组合,并就其中关键因素进行了梯度测试。研究结果表明:通过增设切割槽能自适应补偿过盈形变和过定位误差;相比于其他因素,斜槽上表面顶点到夹具定位板上表面的距离对最大应力值的影响最大,而切割槽长度对最大位移值的影响最大;在相同端部线载荷的作用下,最大位移值随切割槽长度的增加而增加,最大应力值随斜槽上表面顶点到夹具定位板上表面距离的增加而减小。
The fixture based on zero-point clamping technique can effectively ensure the continuity of work and avoid the accuracy loss caused by process or machine tool switching.In order to settle the over-clamping problems caused by multiple clamping slots in the fixture of the zero-point clamping system,a finite element simulation optimization model of cutting groove which can be employed for self-adaptive compensation clamping is established.The primary and secondary order of the main characteristic parameters of the cutting groove on stress and displacement are analyzed by orthogonal test method,the optimal parameter combination is obtained,and the gradient test of the key factors is carried out.The results indicate that the addition of cutting grooves can indeed compensate interference deformation and over-clamping error through self-adaptation.Compared with other factors,the distance between the apex of the upper surface of the inclined groove and the locating plate on the top surface of the fixture has the greatest impact on the maximum stress value,and the length of the cutting groove has the greatest affect on the maximum displacement value.Under the same end line load,the maximum displacement increases with the elevate of the length of the cutting groove,and the maximum stress decreases with the increase of the distance from the vertex of the upper surface of the inclined groove to the positioning plate on the top surface of the fixture.
作者
韩芸
尹佑康
吴炜
马铮
李姚
明伟伟
Han Yun;Yin Youkang;Wu Wei;Ma Zheng;Li Yao;Ming Weiwei(Shanghai Tobacco Machin-ery Co.,Ltd.,Shanghai 201206,China;不详;School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)
出处
《工具技术》
北大核心
2022年第12期69-73,共5页
Tool Engineering
基金
航空发动机及燃气轮机重大专项基础研究(Y2019-Ⅶ-0018-0160)。
关键词
零点定位系统
切割槽优化
有限元仿真
正交测试
应力
zero-point clamping system
cutting groove optimization
finite element simulation
orthogonal test
stress
作者简介
第一作者:韩芸,工程师,上海烟草机械有限责任公司,201206上海市;通信作者:明伟伟,副研究员,上海交通大学机械与动力工程学院,200240上海市。
