摘要
为了准确有效地评价不同装配序列中累积偏差对产品装配质量的影响,建立基于尺寸变动度的装配序列偏差传递模型及质量评价方法,以尺寸变动度所关注的装配特征为目标特征,在构建的装配特征邻接关系矩阵和几何特征公差关系矩阵基础上自动建立偏差传递模型,根据偏差传递过程求解累积偏差确定尺寸变动度。设计人员可据此获得装配质量最优的装配序列,同时可对零件设计公差进行改进。以人造宝石专用加工机床为例,验证了方法的有效性。
To accurately and effectively evaluate the influence of cumulative deviation in different assembly sequences on the product assembly quality,an assembly sequence deviation propagation model and a quality evaluation approach based on degree of dimensional variation are established.To acquire degree of dimensional variation,assembly-feature adjacency matrix and geometrical-feature tolerance matrix are established.According to the matrixes mentioned above,deviation propagation model with information of assembly sequence is automatically created.On the basis of the cumulative deviation calculated through deviation propagation model,the degree of dimensional variation is acquired.Following the evaluation rules,the assembly sequence can be comprehensively evaluated.The designer is able to obtain the assembly sequence with best assembly quality and improve the design tolerance of parts.Finally,a special machine for artificial gemstone is taken as an example to verify the effectiveness of the approach.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2011年第2期1-8,共8页
Journal of Mechanical Engineering
基金
国家自然科学基金(50875239
50835008)
国家重点基础研究发展计划(973计划
2011CB706503)
教育部博士点基金(20090101110040)
中央高校基本科研业务费专项(2010QNA4026)资助项目
关键词
尺寸变动度
装配序列
偏差传递
装配质量评价
Degree of dimensional variation Assembly sequence Deviation propagation Evaluation of assembly quality
