SU1346298A1 - Die for bending parts of clamp type - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used for bending parts of the type of staples with a base of a length shorter than the length of the shelves (P). It allows to increase the quality and reduce the labor intensity of manufacturing parts. The stamp contains a bottom plate with bending matrix and pads placed on it, a punch, an ejector and pivot semi-matrix pivotally connected with it, on which clamps are made for the free sections P. When the punch is lowered, the workpiece is bent in a matrix to form a connected.x with the base of the sections P. At the same time, when turning the semi-matrix, the free parts of P. 6 are bent. oo 4 Oi Yu; o 00

Description

The invention relates to the processing of metals by pressure, in particular to the tooling for cold forming, and can be used in the manufacture of parts such as staples with a base length shorter than the length of the shelves.

The purpose of the invention is to improve the quality and reduce the complexity of manufacturing parts by simultaneously bending the shelves associated with the base and the free areas.

FIG. 1 shows a stamp in the original. position, general, s view; in fig. 2 - stamp in the working position, section A-A in FIG. one; in fig. 3 - semi-matrices in the working position, type B in FIG. one; in fig. 4 - half-matrix in the working position, section BB in FIG. one; in fig. 5 - an example of processing your details; in fig. b - the same, side view.

The bending stamp contains the bottom plate 1, the punch 2, the pads 3 on which the semi-mattresses 4 and 5 are mounted, pivotally connected to the ejector 6.

The bending matrix 7 has bending edges 8 and is intended for bending the clamp sections of the shelf-related portions of the shelf.

To ensure synchronism of the implementation of the flexible parts of the workpiece, one of which is exposed and the other is not exposed to moving semi-matrices 4 and 5, the height of the bending matrix 7 and the pads is selected from the following conditions:

 ,

where // and / are the thickness and radius of rounding of the working surface 9 of the bending matrix 7, respectively;

S - is the thickness of a semi-matrix; League - respectively, the height and radius of rounding of the working surface of 10 pads 3, interacting with movable semi-matrices 4 and 5.

The ejector b has a protrusion 11 beyond its working part, which serves as an axis for the half-matrix 4. An axis 12 is placed in the hole of the protrusion 11, on which the semi-matrix 5 is mounted. The axis is offset from the axis 12 by the width of the ejector b in the plane perpendicular to the axis of the plate.

The ejector 6 is supported on a pusher 13 operating from a lower buffer (not shown).

The semi-matrices 4 and 5 are provided with latches 14 for the free portions of the shelves.

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The stamp works as follows.

In the initial position, the semi-matrix 4 and 5 rests on the working surface of the 10 pads 3.

The sheet blank is placed on the working surface 9 of the bending die 7 and on the reversed semi-matrixes 4 and 5 and is fixed by means of the fixers 14.

During the working stroke of the press, the punch 2. is lowered onto the workpiece, which bends 0 when interacting with the bending edges of the matrix 7. At the same time, the ejector 6 is lowered, and the matrix 4 and 5 slide along the curvatures of the working surface 10 of the pad 3, turning around the protrusion 11 axis 12, respectively, and bend the free parts of the shelves of the part.

When the press is reversed, the punch 2 rises, and all the parts of the shtampa under the action of the pusher 13 return to their original position.

Such a punch design permits the manufacture of staple-type parts with an exact relative position of the free portions of the staple shelves.

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Claims (1)

Invention Formula Stamp for bending parts of the type of staples with the base length, shorter shelf length, containing the bottom plate with fixed pads mounted on it. rotatable semi-matrices arranged on the latter, connected with the ejector, by means of hinge loops, the axes of which are displaced one relative to another by the width of the ejector, and also a punch, characterized in that, in order to improve the quality and reduce the labor intensity of manufacturing 5 parts, simultaneous bending of shelves associated with the base and free sections, it is provided with a bending matrix fixedly mounted on the bottom plate for bending of the sections of shelves connected with the base, rotating semi-matrices are equipped with latches for free shelf sections, the axis of one of the semi-matrixes is made in the form of a cylindrical protrusion with a hole at the ejector face, and the axis of the other semi-matrix is installed in the aperture, the height and radius of curvature of the bending edge of the die exceed the height and radius of the working edge of the pads on the thickness of the half-matrix, a flexible matrix is placed on the side opposite to the protrusion of the ejector in the plane of symmetry of the punch, close to the pads, and the punch is installed with the ability to interact with the edges. working matrix. 0 BUT /  t h p  12 V P  5 of FIG. one A a Type B in-in / Ph.5 6