Journal of the Korean Society for Precision Engineering (한국정밀공학회지)
- Volume 16 Issue 1 Serial No. 94
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- Pages.174-181
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- 1999
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- 1225-9071(pISSN)
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- 2287-8769(eISSN)
Prediction of Tool Wear in Shearing Process by the Finite Element Method
유한요소법에 의한 전단가공 금형의 마멸예측
- Published : 1999.01.01
Abstract
In this paper the technique to predict tool wear theoretically in shearing process is suggested. The tool wear in the process affects the tolerances of final pans, metal flows and costs of processes. In order to predict the tool wear the deformation of workpiece during the process is analyzed by using non-isothermal finite element program. The ductile fracture criterion and the element kill method are also used to estimate if and where a fracture will occur and to investigate the features of the sheared surface in shearing process. Results obtained from finite element simulation, such as nodal velocities and nodal forces, are transformed into sliding velocity and normal pressure on tool monitoring points respectively. The monitoring points are automatically generated and the wear rates on these points are accumulated during the process. It is assumed that the wear depth on the tool surface is linear function of the lot sizes based upon the known experimental results. The influence of clearance between die and punch upon tool wear is also discussed.