Forging die

鍛造用金型

Abstract

【課題】等速ジョイント外輪部材の後方押出し成形に用いられる鍛造用金型において、従来よりも長寿命の鍛造用金型を提供すること。 【解決手段】周方向に所定の間隔で設けられ、中心軸X方向に沿って鍛造用金型10の先端まで延在する複数の凸部11a,11b,11cと、複数の凸部11a,11b,11cの間に設けられ、中心軸X方向に沿って先端まで延在する複数の溝部12a,12b,12cと、凸部11a,11b,11cと溝部12a,12b,12cとの境界部に設けられ、中心軸X方向に沿って先端まで延在する複数の鍔部13a〜13cと、を側面25に備える鍛造用金型10である。先端部の側面25には、外方に突出するランド面21が全周に亘って設けられ、鍔部13a〜13cにおけるランド面21は、中心軸X方向に対して傾斜した傾斜面のみで構成されている。 【選択図】図4
PROBLEM TO BE SOLVED: To provide a forging die having longer life than the conventional one in the forging die which is used for backward extrusion forming of the outer ring member of a constant velocity universal joint.SOLUTION: The forging die 10 includes: a plurality projecting parts 11a, 11b, 11c which are provided at a predetermined interval in the peripheral direction and extended to the top of the forging die 10 along the direction of the center axis X; a plurality of groove parts 12a, 12b, 12c which are provided between the plurality of the projecting parts 11a, 11b, 11c and extended to the top along the direction of the center axis X; and a plurality of collar parts 13a-13c which are provided in the boundary parts between the projecting parts 11a, 11b, 11c and the groove parts 12a, 12b, 12c, respectively and extended to the top along the direction of the center axis X, on the side face 25. On the side face 25 of the top part, a land face 21 which is outward projected is provided over the entire periphery and the land face 21 in the collar parts 13a-13c is constituted of only an inclined face which is inclined with respect to the direction of the center axis X.

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Cited By (1)

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    CN-103722066-AApril 16, 2014江苏威鹰机械有限公司三球道等速万向节筒形壳精整成形方法及其精整凸模