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RISS 인기검색어
- 검색키워드
- 저자 : Gow-Yi Tzou (검색결과 2 건)
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Study on Rotating Compression Forming of Double-layer Clad Ring Considering Coulomb Friction
Gow-Yi Tzou,Yeong-Maw Hwang,Hsiang-Yu Teng 한국정밀공학회 2014 International Journal of Precision Engineering and Vol.1 No.3
This study uses two FEM simulations based on deform 3D and superform commercial software assuming coulomb friction to explore the plastic behavior in rotating compression forming of double-layer bounded clad ring. The rotating compression forming can reduce the compressive force and make the deformation uniform. Effects of the frictional coefficient, shear yield stress ratio, rotating angular velocity, frictional coefficient ratio, clad ring height ratio etc on compression characteristics including the effective stress, the effective strain, the velocity field, the shear strain, the compressive force etc. are investigated effectively. Moreover, the realistic rotating compression experiments of clad ring have been carried out to verify the acceptance of both FEM simulation models.
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FEM ANALYSIS AND EXPERIMENT VALIDATION ON MULTI-PASS FORGING OF TORX ROUND FLANGE BOLT
Shih-Hsien Lin,Dyi-Cheng Chen,Un-Chin Chai,Gow-Yi Tzou 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.5
This study aims at exploring the multi-pass forging of Torx Round Flange Bolt (automotive fastener) to simulate each pass forging process using FEM simulation. The software is used to carry out the simulation analysis. Constant shear friction is always assumed at the interface between die and workpiece to explore the effective stress, the effective strain, the velocity filed, and the forging force for each pass. Through the pass schedule plan and design based on FEM analysis, the four-pass forging process is designed to form the Torx Round Flange Bolt compared the five-pass forging. It is noted that the total forging force is 1204kN, so the 200 tons machinery in the factory can be chosen to manufacture this automotive fastener. The die stress analysis for each pass has been explored to realize whether the dies are damaged or not. The forming feasibility of Torx Round Flange Bolt can be performed by FEM simulation. All dies designs and forming results can be proposed to the dies manufacture so as to perform the realistic experiments. Comparisons between FEM and experiment for final product dimensions can be carried out. The maximum dimension error is just around 3.32% to show a good agreement with the experiment. The research results can provide to the industries as the references of establishment of multi-pass forging technology.
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