| 摘要 |
A negative angular forming die having a lower die for supporting a workpiece. An upper die is lowered with respect to the lower die to abut against the workpiece for forming the workpiece. A columnar body is rotatably mounted on the lower die, and a groove is formed in the columnar body in the axial direction of the lower die. A slide cam is supported on the upper die and is opposed to the columnar body. An automatic returning tool is provided on the lower die for rotating and retracting the columnar body to a position at which the workpiece can be taken out from the lower die after the forming process is completed. The workpiece is placed on the supporting portion of the lower die with the columnar body being turned, and the slide cam is slid to form the workpiece by an entering forming portion of the columnar body. The columnar body is turned and retracted by the automatic returning tool after forming so that the formed workpiece can be taken out from the lower die. A clamping member is slidably mounted in the columnar body and acts to clamp the workpiece during forming.
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