Quality Assessment by Analysis of Yoke Caulking Process Considering Strain Rate Sensitivity

변형률속도 민감성을 고려한 요크 코킹공정의 해석에 의한 품질 평가

  • 박문식 (한남대학교 기계공학과) ;
  • 강경모 (한남대학교 대학원 기계공학과) ;
  • 한덕수 (강원대학교 대학원 기계메카트로닉스공학과)
  • Published : 2003.06.01


This paper is to predict quality deterioration resulting from a caulking process of yoke which is a part of automotive steering system. The caluking is a plastic deformation process involving such as impact of high speed tool, contacts between part and fixtures and strain rate sensitivity of the part material. Elaborate application of finite element method is neccesary to calculate changes of part dimensions because they fall into a level of tolerances. Simple work hardening and strain rate sensitive model is proposed fur the material and applied for the simulation by using Abaqus which is able to cater for elastoplastic rate sensitive material and contacts. Numerical results of test models that represent tensile bar and tensile plate are compared with material data inputs. Dimensional changes for the yoke are calculated from simulations and compared to the mesurements and they show good agreement. The method presented here with the material model proved to be valuable to assess quality deterioration for similar metal forming processes.


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