SU1281324A1 - Die for making articles with undercut and bent lug - Google Patents

Abstract

The invention relates to dies for the manufacture of products with a notched and bent tab, advantageously L-shaped, from a sheet blank and improves the reliability of removing the product from the treatment area. The strain contains a punch (P) 1 with notch edges and a bending platform, a matrix (M) 2, spring-loaded to the base 4 with lateral and transverse cutting edges and a window for bending, the lower P 5, a removable bar 6, mounted console in the window M and having bending edges. The workpiece is laid on M 2, during the course of P 1, cutting is performed with bending. Then M 2 begins to descend on the springs 3, until the upper end of the P 5 and the lower surface of the bar 6 merge the flange of the shelf. After lifting P 1, the part is moved to the side of the window and is removed upwards from the punch,., 6 Il. (L

Description

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The invention relates to the processing of metals by pressure and can be used in the manufacture of products from sheet metal.

The purpose of the invention is to increase the reliability of removal of the product from the treatment area.

FIG. 1 shows a stamp scheme; in fig. 2 - bottom plate, top view; in fig. 3 - at the time of the beginning of the incision; in fig. 4 - the same, in the mo-mg-mt endings are flexible; in fig. 5 - pa -.- cut L-A in FIG. one; in fig. 6 - product.

The stamp contains the upper punch

1c, the 1I edge for notching and the bending platform, the die 2 mounted on the springs 3 in the base cavity 4 with lateral and transverse cutting edges and the bending window are mounted on the base 4 of the lower punch 5 mounted in a bending window a removable bar 6 sec. top and bottom three

bending edges.

Matrix side cutting edges

2 are made divergent from the ends of the removable bar 6,

At the upper end 7 of the lower puapzap 5, there is a bending stream, yo, with the width of the forming surface 8 of the removable bar 6.

The stamp works as follows

The blank is laid on the matrix. When the punch 1 moves downward, an incision takes place and at the same time bends the incised area, since the punch has a curvilinear cutting edge. The springs 3, which are superior in compressive strength and the lasting cuts, remain motionless until the punch 1 completely enters the matrix window and begins to exert pressure on its mirror. Now the compression force of the springs is less than the force developed by the press, so the matrix 2 starts to descend on the springs 3 into the base cavity 4 until those noji until the upper end 7 and the bottom surface 8 form the end of the shelf similarly to the punch and. the matrix.

After raising the punch 1 upward, the part is moved in the direction of arrow B so that the flange is bent in the window, by moving upward the part is removed from the die. Since the lower part of the shelf was subjected to technological bending, its transverse linear dimension; reduced and the shelf is easily removed from the window. The form of technological bending can be any, permissible part design.

Offered stamp in comparison with the known provides more than double the performance.

F. formula of invention

25

thirty

A stamp for the manufacture of products with a notched and bent tab, predominantly L-shaped from a sheet blank, containing a base, a matrix spring-loaded to the base, with side and transverse cutting edges and a bending window, an upper punch having corresponding cutting edges for the incision and a bending platform, and an installed . On the basis of the lower punch, 6T- 35 distinguished by the fact that, in order to increase the reliability of removing the product from the processing zone, it is equipped with a removable plate with the upper and three lower bending edges, mounted in the bending window of the die, the lateral cutting edges of the die diverging in the direction from the ends of the removable plate, and at the upper end of the lower punch there is a bending stream, the width of which corresponds to the width of the removable plate.

45phys .Z

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FIG. five

6

Claims (1)

Claim A stamp for the manufacture of articles with a notched and bent tab of a predominantly L-shaped form from a sheet blank, containing a base, a spring-loaded matrix with side and transverse cutting edges and a folding window, an upper punch having a corresponding cutting edge matrix and a bending pad, and established. based on the lower punch, about 35, characterized in that, in order to increase the reliability of removing the product from the treatment zone, it is equipped with a removable bar with an upper and three lower bending edges mounted cantilever in the bending window of the matrix, the lateral cutting edges of the matrix are made diverging away from the ends of the removable I * strips, and on the upper end of the lower 45 - punch made bending stream, the width of which corresponds to the width of the removable strap.