• Title/Summary/Keyword: DEFORMTM-3D

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Analysis of the Curving Phenomenon of Curved Circular Shaped Product by the Upper Bound Analysis and the DEFORMTM-3D in Eccentric Extrusion (곡봉(曲奉)의 편심압출가공에 대하여 상계굽힘해석과 DEFORMTM-3D에 의한 굽힘해 석 비교)

  • 김진훈;김한봉;진인태
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 1997.10a
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    • pp.45-48
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    • 1997

  • The kinematically admissible velocity field is developed for the eccentric extrusion of circular shaped products. The curving of product in extrusion is caused by the difference of the linearly distributed longitudinal velocity on the cross-section of the workpiece at the dies exit. The results of the eccentric extrusion by upper bound analysis show that the curvature of product increases with the increase in eccentricity of gravity center of the cross-section of workpiece at dies entrance from that of the corss-section at the dies exit end. By the DEFORMTM-3D analysis, the curving of circular shaped product in extrusion is changed by the eccentricity, die land length and the die length. The result of the analysis by DEFORMTM-3D software shows that the curvature of circular shaped product increases with the eccentricity. The two analysis and one experiment show the curving phenomenon in eccentric extrusion process.

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Analysis of the Curving Phenomenon of Curved T-Shaped Product by the Upper Bound Analysis and the $ DEFORM^{TM}$-3D in Eccentric Extrusion (굽은 T形 제품의 편심압출가공에 대한 상계굽힘해석과$ DEFORM^{TM}$-3D에 의한 굽힘 해석 비교)

  • 김한봉;김진훈;진인태
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 1997.10a
    • /
    • pp.49-52
    • /
    • 1997

  • The kinematically admissible velocity field is developed for the analysis of the curving of an eccentric extrusion. The curving of product in extrusion is caused by the difference of the linearly distributed longitudinal velocity on the cross-section of the workpiece at the dies exit. The result of the analysis show that the curvature of product increases with the increase in eccentricity of gravity center of the cross-section of the workpiece at the die entrance from that of the cross-section at the die exit. It also increase with the die land dimension. By the DEFORMTM-3D analysis, the curving of T-shaped product in extrusion is changed by the eccentricity, die land length and the friction constant. The result of the analysis by DEFORMTM-3D software shows that the curvature of circular shaped product increases with the eccentricity. The two analysis and one experiment show the curving phenomenon in eccentric extrusion process.

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An Analysis of the Twisting and Bending Extrusion Process of the Product with the Rectangular Section by the $ DEFORM^{TM}$-3D (사각단면을 가진 압출제품의 비틀림굽힘 압출가공법에 대한$ DEFORM^{TM}$-3D 해석)

  • 윤선홍
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 1999.03b
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    • pp.115-118
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    • 1999

  • The twisting and bending extrusion process is developed by the $DEFORM^TM$-3D. Because the rectangular section of the extruded product has the symmetry line of cross-section area, the twisting and the bending of extruded product has not occurred. The product with the rectangular section is applied to the twisting and bending extrusion process through the twisted die surface and eccentricity die section. It is shown that the twisting of extruded product is caused by the twisted die surfaces and the bending of extruded product is causd by the eccentricity between the die section. The results by the analysis show that the twisting angle and the curvature of extruded products increases by the die twisting angle, the eccentricity, but decreases by the die length, and friction condition

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