| 摘要 |
A tool for a progressive forming machine comprising an assembly having a workpiece shaping cavity symmetrical about an axis and including an end wall transverse to the axis, a conical bore open to the end wall and centered on the axis, the sides of the conical bore being described by a relatively small angle relative to the axis, and an ejector pin for forcing workpieces form the cavity, the ejector pin having an end face and a conical body portion rearward of the end face, the conical body portion having an external surface matching a surface of the conical bore. |
| 主权项 |
1. A tool for a progressive forming machine comprising an assembly having a workpiece shaping cavity symmetrical about an axis and including an end wall transverse to the axis, the end wall having a slope change in a zone symmetrical about the axis forming a centering and stabilizing pocket for a workpiece, a conical bore open to the end wall and centered on the axis, and an ejector pin for forcing workpieces from the cavity, the ejector pin having an end face and a conical body portion rearward of the end face, the conical body portion having an external surface matching a surface of the conical bore, a mouth of the bore and end face of the ejector pin being spaced radially inwardly from the pocket, the end wall having inner and outer circular areas of different positive slopes forming the pocket, the inner area being closer to a plane perpendicular to the axis than the outer area, the inner area being concave. |
