[机械设计自动化精品] 机械运动方案的模糊综合评价方法研究 基于模糊综合评价与遗传算法的公差优化分配 外文文献.pdf

Int J Adv Manuf Technol (2000) 16:461–468
 2000 Springer-Verlag London Limited
Optimal Tolerance Allocation Based on prehensive
Evaluation and ic Algorithm
S. Ji, X. Li, Y. Ma and H. Cai
The Advanced Machining Technology Center, Harbin Institute of Technology, Harbin, China
It is very important to know how to allocate tolerances econ- has e an important research direction in CAD systems
omically for parts in a CAD/CAM system because this directly and integrated CAD/CAM systems [4–7].
affects the machining costs of the parts. A new approach Tolerance allocation is one of the most important problems
based on prehensive evaluation (FCE) and a ic for CATD. Given a required tolerance for the assembly, the
algorithm (GA) is presented to obtain a rational tolerance planner is first faced with the problem of how to allocate
allocation for the parts. First, the current methods for tolerance economically suitable tolerance values for the parts by consider-
allocation are reviewed in detail. Then, FCE is used to evaluate ing the trade-off between functional requirements and machin-
the machinability of a part; a new optimal model, which can ing costs. Many researchers considered tolerance allocation as
fully exploit DFA (design for assembly) and DFM (design for an optimisation problem. The tolerance values of parts were
manufacturing), is established bining the functional t