SU576141A1 - Bending die - Google Patents

Description

one

The invention relates to the processing of metals by pressure, in particular to bending dies of sheet material.

A bending punch is known, containing, in a matrix, pivotally connected by edges with each other and interacting with the forming surfaces with a punch, and the supporting ones with a spring-loaded pusher and pads 1.

The hinges are located on the front and back sides of the half-cucumbers in the direction of sheet feeding. Long-length semi-matrices are flexed under the force of bending, opening in the middle part of their length between the hinges, which leads to the deformation of the stamped part, to the distortion of its shape and size.

A bending punch is known that contains semi-matrices that are articulated by the edges interconnected and interacting with the forming surfaces with the punch, and the supporting ones with the spring-loaded pusher and the pads, and the spherical tips. Spherical liners are placed on the pads and do not prevent longitudinal deformation if their hinges are located along the edges of the semi-matrix. In order to eliminate the longitudinal deformation of the semi-matrix, spherical subplates are placed on the pusher 2.

FIG. 1 and 2 given the proposed chip in two projections in the initial position, the total

view; in fig. 3 - the same in the working position. The bending plate contains semi-matrices 1, interacting with the forming surfaces with punch 2 and supporting ones with pads 3 and spherical pillows 4 placed on the spring of the push rod 5. Loops 6 and 7 are connected to the edges of semi-matrix 1, axes of ethn axes The entrance is in the vertical grooves of the uprights 9 connected to the lower plate 10 of the strain with screws 11 and pins 12. In the upper part of the uprights 9 there are transverse pins 13 that hold the axes 8 in the extreme upper half. The stamp works as follows. The sheet blank (not shown) is laid on the unfolded New Furniture 1 and fixed onto them in one of the known ways, using fonts or stencils (not shown). During the working stroke of the press, the punch is lowered onto the workpiece and begins to bend it, causing the semi-matrix 1, and with it the spherical baffles 4 to rotate, and the ends of the matrix 1 slide through the rounding pads 3, and the pusher 5 lowers until it reaches the bottom the position bounded by the plane of the bottom plate 10.

When the press is reversed, the punch 2 rises, and the weight of the part of the lower part of the strain returns to its initial position,

In this case, the rise in the original position

The lower part of the stamp is discarded by springs 14. Ou can also be implemented in other ways, for example, with the help of a buffer device.

Form m u l a and 3 o b r e e i u

The bending punch, the content of the 1-D semi-matrix, are jointly connected by edges between each other and the interaction.; Neither by forming surfaces with a punch, but by support surfaces - with a sub-pusher pusher and pads, and

spherical subguides, from l and h and w, and with the fact that, in order to eliminate the longitudinal deformation of the matrices, spherical supports are placed on the pusher.

Sources of information taken into account in the examination

1. Smprpov-Al. G. A., Weintraub D. A. “Cold-bonding in Instrument Making, M., 1963, p. 326-328, fpg. 180a

2. Pathept USA “2505718, cl. 72-396, 1950.