JPH01172499U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a lower die of a press working apparatus according to a first means of the present invention. FIG. 2 is a cross-sectional view of FIG. 1. FIG. 3 is a diagram showing the relationship between the amount of variation in the wrinkle presser load and the amount of variation in the outer load in the press processing apparatus shown in FIG. 1 in comparison with the conventional press processing apparatus. Figure 4 is the first
It is a figure which showed the relationship between the fluctuation|variation of the outer load and the fluctuation|variation of the shared load of each part in the press working apparatus of a figure. FIG. 5 is a diagram showing variations in the load shared by each part and the wrinkle pressing load when the height of the distance plate in the press processing apparatus shown in FIG. 1 is changed. FIG. 6 is a plan view showing the lower mold of the press working apparatus according to the second means of the present invention. FIG. 7 is a cross-sectional view of FIG. 6. Figure 8 is the 6th
It is a figure explaining an example of the drive mechanism of the press processing apparatus of a figure. FIG. 9 is a diagram showing a main part of another embodiment according to the second means of the present invention. FIGS. 10 and 11 are plan views of a lower die for explaining an example of a conventional press working apparatus, respectively. 10, 12: Distance plate (separating block), 14: Lower die (squeezing member), 16: Blank holder (squeezing member), 18: Plate-shaped workpiece, 20
: Peripheral part, 30a, 30b, 30c, 30d: Driving force receiving cylinder, 32: Piston, X, Xa,
Xb, Xc, Xd: Pressure point, l, m: Diagonal line (straight line), Pa: Wrinkle pressing load (pinch pressure), Pb:
Load shared by the distance plate 12, Pc: Load shared by the distance plate 10.

Claims (1)

[Claims for Utility Model Registration] (1) It has a pair of clamping members that are brought relatively close together to clamp the peripheral edge of a plate-like workpiece, and
A separation block that is interposed between the pair of clamping pressure members and restricting the approach of the clamping pressure members is a pressure point on the outside of the plate-shaped workpiece to which a driving force is applied to bring the clamping pressure members closer together. and a nearby point of the plate-shaped workpiece that is close to the pressurizing point, or is disposed on the outside of the plate-shaped workpiece, and restricts the approach of the pair of clamping pressure members. The press working apparatus is characterized in that the clamping pressure on the peripheral edge of the plate-shaped workpiece is kept substantially constant by this, wherein the spacing blocks are arranged at a plurality of locations having different distances from the plate-shaped workpiece. Press processing equipment. (2) In a press processing device equipped with a pair of clamping members that are brought relatively close to each other to clamp the peripheral edge of a plate-shaped workpiece, a driving force for bringing the clamping members closer to each other on the outside of the plate-shaped workpiece. On or near a straight line connecting a pressurizing point on which the pressure is applied and a nearby point of the plate-shaped workpiece that is close to the pressurizing point, and on the outside of the plate-shaped workpiece, regardless of the protruding position of the piston. First, a cylinder that protrudes the piston at a predetermined set pressure is disposed between the pair of clamping pressure members, and the clamping pressure on the peripheral edge of the plate-shaped workpiece is adjusted by adjusting the set pressure according to the driving force. A press processing device characterized in that it maintains substantially constant.