| 摘要 |
PURPOSE:To increase the pressing rate of a composite material by setting the pressing angle of the composite material by a blank holder and blank holder face of a die by inclining at the angle within the prescribed range for the direction at right angles with the moving direction of a punch. CONSTITUTION:The pressing angle theta of the composite material 19 by a blank holder 13 and die 17 is set by inclining at the prescribed angle for the direction at right angles with the moving direction of a punch 21. The feeding of materials becomes smooth, therefore, even in case of the composite material that the plastic deformation of the metal plate is easy to be contained by the plastic plate and the rupture limit due to the plastic deformation rises. An Al plate, Al alloy plate, etc., can be used for the metal plate in the composite material. On the other hand a vinyl chloride polymer group resin, etc., can be used for plastic plates. Besides any material can be used if it is the composite material suitable for pressing. The pressing angle theta is preferably in the range of 2-10 deg., specially 4-7 deg. range.
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