摘要
针对箱体、壳体类零件大批量生产中,由于采用的传统一面两销定位存在配合间隙,各工序无法达到完全基准统一,易造成产品质量不稳定的问题。提出了一种采用两个带挠性的多齿瓣圆柱销代替传统的圆柱销和菱形销的无间隙定位方法。通过最小二乘法寻找到定位销弹性齿瓣的最小弹性区间,定位孔中心距公差带只需满足在最小弹性区间内变化即可。利用定位销弹性齿瓣的回复力与定位孔自适应配合的方法消除销孔之间的配合间隙,实现定位基准统一。数值仿真计算验证了提出的无间隙定位方法的有效性。
In the mass production of box and monoblock parts,due to the clearance between the traditional location of one plane and two pins.The complete unification of datum of each process cannot be reached,which easily causes the problem of unstable product quality.A new clearance-free location method with two elastic multi-tooth cylindrical pins instead of traditional cylindrical pins and diamond pins is proposed.The elastic interval of the teeth of the locating pin is searched by the least square method,then tolerance zone of the center distance of the locating hole only satisfies to the elastic minimum interval.The clearance between the pin and the hole is eliminated through self-adaptive fitting relied the resilience of elastic teeth of location pin,consequently the real unification of location datum of each process is realized.Ultimately,the validity of the present clearance-free location method is verified via numerical simulation.
作者
吴盘龙
胡东方
Wu Panlong;Hu Dongfang(School of Mechatronics Engineering,Henan University of Science and Technology,He′nan Luoyang 471003,China;Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province,He′nan Luoyang 471003,China)
出处
《机械科学与技术》
CSCD
北大核心
2020年第11期1747-1752,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51775172)
洛阳市重大科技专项项目(1801006A)资助。
关键词
无间隙定位
最小二乘法
定位销弹性齿瓣
定位基准统一
clearance-free location
least square method
elastic teeth of location pin
unification of location datum
