Research on Fixture Locating Error Verification Based on Statistics Method

Abstract:

Fixture Tolerance is one of the most important factors influencing the machined part accuracy. However caused by the manufacturing error and the assembly error of locator, the workpiece location error should not be neglected, which has led to fixture accuracy decay. A location error verification method is presented to improve the workpiece location accuracy. First, the origin of location error and the transfer process of error between locators and the workpiece are given. Second, random numbers and statistical analysis method are used to simulate locators’ errors. Finally, the location layout optimization model and the process are given. This method can be used to verify the location error and fixture design process.

• Periodical: Applied Mechanics and Materials (Volumes 556-562)
• Pages: 4255-4259
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.556-562.4255
• Online since: May 2014
• Authors: Wen Li Han*, Fa Ping Zhang, Bo Gao, De Hui Zhai, Hao Li
• Keywords: 3-2-1 Method, Locating Error Verification, Random Simulation

References

[1] Wang Hui, Rong Yiming, Li Hua, et al. Computer aided fixture design: Recent research and trends. Computer Aided Design. Vol. 42(2010), pp.1085-1094.

DOI: 10.1016/j.cad.2010.07.003

[2] Kaya Necmettin. Machining fixture locating and clamping position optimization using genetic algorithms. Computers in Industry. Vol. 57(2006), pp.112-120.

DOI: 10.1016/j.compind.2005.05.001

[3] Zhihui Liu, Michael Yu, Kedian Wang, et al. Multi-objective optimization design of a fixture layout considering locator displacement and force–deformation. Int J Adv Manuf Technol. Vol. 67(2013), p.1267–1279.

DOI: 10.1007/s00170-012-4564-7

[4] Tudor Paunescu. Statistical accuracy analysis of the 3-2-1 location due to geometric errors of the modular fixture. 1st International conference on Manufacturing Engineering, Quality and Production Systems (MEQAPS 2009). Vol. 2, pp.414-419.

[5] Zhang Xiaoping, Yang Wenyu, Li Miao. An uncertainty approach for fixture layout optimization using Monte Carlo method. Lect. Notes Comput. Sci. Vol. 6425(2010), pp.10-21.

DOI: 10.1007/978-3-642-16587-0_2