Development of tolerance design method based on product performance using statistical tolerance index and verification of practicality

2016 Fiscal Year Final Research Report

• Project/Area Number: 26870774
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Social systems engineering/Safety system; Design engineering/Machine functional elements/Tribology
• Research Institution: Tokyo University of Science, Yamaguchi
• Principal Investigator: Otsuka Akimasa 山陽小野田市立山口東京理科大学, 工学部, 講師 (90611848)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 公差設計 / 幾何公差 / 品質管理 / 工程能力指数 / CAE

Outline of Final Research Achievements

For a simple product model, normal random numbers were generated within specified conventional-tolerance as machining error. A thousand pieces of product were simulatively generated, and product performance of those were respectively calculated using the finite element method software. Frequency distributions about product performance were calculated. Those processes were repeated by changing the values of statistical tolerance index. Comparing the calculation results, effectiveness of statistical tolerance index was confirmed. Furthremore, design method of statistical tolerance index was also developed, which was consisting of the Monte-Carlo simulation and the real-coded genetic algorithm. The effectiveness of the method was confirmed through case studies using a virtual product.

Free Research Field

設計工学