| 摘要 |
PROBLEM TO BE SOLVED: To dispense with splitting of a rotary cam and a forming process by enlarging a setting range of the rotation center of the rotary cam regardless of a shape of the negative angle part of a work. SOLUTION: The press die is constituted so that a rotary cam 10, which has a longitudinal groove 11 in the axial direction and has a negative angle formed part 12 to one side edge part of the longitudinal groove 11, is turnably arranged in a cam base 13, by rotating the rotary cam 10 around a horizontal axis O, the negative angle formed part 12 is positioned to a working position, as an upper die descends, by advancing the working cam of a shifting cam mechanism into a negative angle formed part 12 side as shown in an arrow mark T, the negative angle part having a negative angle to a press direction P is formed. To the tip of a fixed die in which a base end part is fixed to the cam base 13 and which is extended in the direction orthogonal to a rotary cam 12 axis, an inclined formed part 17, which substitutes part of the negative formed part 12 of the rotary cam 10, is arranged, a setting range of the rotation center O of the rotary cam 10 is enlarged, the freedom of setting of the rotary cam 10 is improved.
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