Transactions of Materials and Heat Treatment

Title：Failure analysis on warm extrusion die of bearing retainer

Authors： WANG Yan-ke~(1) YANG Yong-shun~(1) HOU Ming~(1) LI Ming-liang~(1) ZHOU Xin-ping~(2)(1.School of Material Science and Engineering Henan University of Science and Technology Luoyang Henan 471003 China 2.Division of Asset Management Henan University of Techn

Unit：

KeyWords： die worm extrusion numerical simulation

ClassificationCode：TG375.41

year,vol(issue):pagenumber：2006,31(1):61-63

Abstract：

Warm extrusion forming for copper alloy solid bearing retainer is a valuable technology and has many advantages contrasted to traditional manufacture method.Aiming at the problem of bottom die crack of warm extrusion,a three dimensional model of warm extrusion die is achieved by using SolidWorks software and numerical simulation.The analysis is also made by using ANSYS software.It is found that the stress distribution is uneven and the stress concentration is rather severe.The analysis shows that the stress concentration is the cause of crack.In order to solve the problem,two projects are put forward.One project is to increase the thickness of die so as to reduce the concentration of stress.Another project is to modify the structure of die in order to eliminate the stress concentration completely.These two projects are all validated by using numerical simulation and proved effectively.

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Reference：

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