摘要
夹具设计的优劣直接影响着工件的质量和精度。分析了定位基准的选择方法,构造了定位基准指标因子表达式,并建立了定位方案层次结构模型。在此基础上,建立了基于约束自由度因子、加工刚度因子和工艺成本因子等指标的夹紧方案评价模型。采用灰数逼近理想解排序法方法对定位方案进行了评价,并利用其评价结果对夹紧方案进行了评价。最后,通过实例验证了所提方法的可行性并确立了最优夹具设计方案。
The ideal and non-ideal jig and fixture designs affected the quality and accuracy of workpiece.The selection method of location datum was analyzed,and the evaluation indexes of location datum were deeply studied to construct the corresponding factor expressions.The level model for locator scheme was established.Then,the evaluation model of clamping scheme was proposed,including three indexes,such as the constraint degrees of freedom,the processing stiffnesses,and the process costs.The sorting of location scheme was computed by grey TOPSIS,and the results were used to compute clamping scheme.Finally,the optimal jig and fixture design scheme was obtained by the proposed method.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2016年第20期2728-2734,共7页
China Mechanical Engineering
基金
浙江省自然科学基金资助项目(Y14F030058)
关键词
夹具设计方案
定位
夹紧
灰数
逼近理想解排序法
评价
jig and fixture design scheme
location
clamping
grey number
technique for order preference by similarity to ideal solution（TOPSIS）
evaluation
