| 摘要 |
A wall ironing tool pack is disclosed, incorporating one or more wall ironing dies and a redraw die to reduce the cup shaped work piece to dimensions for wall ironing, wherein said reduction may amount to about 30 percent, and whereby the risk of fractures, or wrinkling of the work piece is avoided. One or more ironing dies and the redraw die are held in a holder and clamped by means of an annular hydraulic cylinder and piston disposed between any two rings. Hydraulic pressure supplied to said cylinder to actuate said piston is controlled by means of a regulator, whereby adjustment of the pressure on the cup to be redrawn may be made rapidly during operation, to insure the desired redrawn cup for subsequent wall ironing without risking fractures if the pressure is too high, or wrinkles if the pressure is too low, and maintaining the several dies in clamped relation.
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