【摘要】 定位误差分析是评价机床夹具设计质量高低的重要途径,也是评价夹具定位方案是否合理、可靠、可行以及效率高低等因素的有效方法。组合面定位误差分析是机床夹具设计中的一个瓶颈问题,目前由于研究的理论基础相对薄弱,文章就此进行研究与分析,通过对"一面两销"和"一面两孔"组合定位方案分析,揭示组合面定位误差产生的原因和规律性,提出了将"圆轴销"改变成"菱形销"的方案,有效避免了过定位现象的存在,减小了基准位移误差和转角误差的值,为机床夹具设计与优化、生产实践提供科学的理论基础和重要依据。更多还原

【Abstract】 Positioning error analysis is the important way to evaluate the quality of machine tool fixture design,it is effective method to evaluation of fixture locating scheme is reasonable and reliable,feasible and efficiency of high and low.It is a bottleneck problem that combinatorial plane positioning error analysis in machine tool fixture design.At present,the research’s theoretical basis is relatively weak.In this paper,the"side two pin"and"two holes"positioning scheme was analyzed,which reveals the causes of surface positioning error and regularity,the scheme was put forward that"circular shaft pin"should be changed into"the diamond pin",this way avoids the localization phenomenon exists effectively and reduces the value of the datum displacement error and Angle error,that all provides scientific theoretical basis and important basis for machine tool fixture design and optimization and the production practice.更多还原