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CN105517726A 中心孔成形方法和锻造装置 有权

中心孔成形方法和锻造装置
摘要：
在中心孔成形方法中，将待加工的物体(2)插入到模孔(18)中，并且从物体挤压出轴(3)。在不将物体从模孔中取出的情况下对物体的第二轴向端面(4a)施加朝向物体的第一轴向端面(3a)的载荷。第一轴向端面的直径小于第二轴向端面的直径。在对第二轴向端面施加载荷的状态下通过使反凸模(15)压靠第一轴向端面而在第一轴向端面中形成中心孔。
摘要（英）：

In a center hole forming method, an object (2) to be processed is inserted in a die hole (18) and a shaft (3) is drawn from the object. A load toward a first axial end surface (3a) of the object is applied to a second axial end surface (4a) of the object without taking out the object from the die hole. A diameter of the first axial end surface is smaller than a diameter of the second axial end surface. A center hole is formed in the first axial end surface by pressing a counter punch (15) against the first axial end surface in a state that the load is applied to the second axial end surface.

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