Fixture design and sequence analysis for low stress assembly of precision miniature devices without disturbance
The importance of fixturing is often underestimated in the development of precision assembly system for miniature products.A 5-part component of a micro accelerometer is selected as an example in this paper.The sensitive structure that influences the performance of accelerometer most is the flexible beam on one part.A fixture with flexible fastening mechanism was proposed for assembly these miniature parts.The key mechanism is a flexible part,which is with two contacted points and metal flexible linkages.The thermal stress of the component after curing was studied using finite element model (FEM).The simulation results revealed that the height difference was the main cause to the stress on the flexible beam.The assembly sequence and strategy were optimized.The maximum stress was reduced to 72% of the original one while the height difference reached 15 μm.This study implies that an optimized fixture design and assembly sequence can also reduce the assembly stress remarkably.
assembly fixture precision assembly miniature device assembly sequence
Yi Luo Xiaodong Wang Pengyu Chen Weimin Yang Liang Chen
Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education Dalia Flight Automatic Control Research Institute Aviation Industry Corporation of China Xian , China
国际会议
2013 International Symposium on Assembly and Manufacturing(2013装配与制造国际专题会议)
西安
英文
163-166
2013-07-01（万方平台首次上网日期，不代表论文的发表时间）