China Plastics ›› 2022, Vol. 36 ›› Issue (3): 96-103.DOI: 10.19491/j.issn.1001-9278.2022.03.016

• Processing and Application • Previous Articles     Next Articles

Multi⁃objective optimization for MIM process parameters of equal⁃distance spiral bevel gear

LIU Ganhua1(), TANG Naifu1, MA Ruiwu2   

  1. 1.School of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China
    2.Shenzhen MIM Technology Co,Ltd,Shenzhen 518100,China
  • Received:2021-11-16 Online:2022-03-26 Published:2022-03-25

Abstract:

Owing to a complex structure, the equal?distance spiral bevel gear often shows an uneven distribution in volume shrinkage and powder concentration during the powder injection molding stage. This causes the gear to produce warpage deformation and surface black lines. To solve this problem, the MIM process forming equal?distance spiral bevel gear was simulated using the Moldex3D software. Through combining with an orthogonal experimental design, the volume shrinkage rate and powder concentration corresponding to each process parameter combination were obtained. The influence of each process parameter on the response target was obtained from the analysis of the mean value and range. The BP neural network combined with the non?dominant sequencing genetic algorithm (NSGA?II) was used to perform the multi?objective optimization of the MIM process parameters. The results indicated that the optimal process parameters after optimization greatly improved the uniformity of volume shrinkage distribution and powder concentration distribution, thus improving the quality of the MIM equal?distance spiral bevel gear.

Key words: metal powder injection molding, equal?distance spiral bevel gear, powder concentration, volume shrinkage, multi?objective optimization

CLC Number: