SU1556788A1 - Die for twisting strip in two planes - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to tooling for twisting a strip in two planes, and can be used in mechanical engineering. The purpose of the invention is to improve the quality of products. On the upper and lower plates of the stamp set the clamps of the ends of the workpiece, the upper and lower work items (re). Each clamp consists of spring-loaded clamps with limiting flanges installed on the OM. Each re is made with protrusions having supporting, calibrating and bending surfaces. A gap in the thickness of the workpiece is made between the calibrating surfaces. The deformation is carried out after fixing the clamps between the bending surfaces. Then the calibrating parts of the OM give the details a final look. By changing the angle of inclination of the pressure surfaces, twisting by an angle less than 90 ° can be carried out. 2 Il.

Description

The invention relates to the processing of metals by pressure, in particular to tooling for twisting a strip in two planes, and can be used in mechanical engineering.

The aim of the invention is to improve the quality of products.

FIG. 1 shows a stamp, a general view; in fig. 2 is a section A-A in FIG. one.

The stamp consists of an upper 1 and lower 2 plates connected by guides 3 and a shank 4 fixed on the upper plate. Plates 5 and 5 are fitted with plates 5 with rectangular cross-section sockets for fixing the shanks 6 of the upper and lower working elements 7. Each working element 7 contains a plate 8 with two projections 9 having a bearing surface 10 and with opposing projections 9 the protrusions 11 having a support surface 12, a calibrating surface 13 and a bending surface 14.

Each pair of protrusions 9 and I is installed with an offset relative to the longitudinal plane of symmetry of the stamp with the formation of a working gap between the calibrating

surfaces 13 and without a gap between surfaces 1 1 and 12.

The plates 8 are provided with square holes 15 for accommodating stepped clamps 16 and 17 of the clamping units of the ends of the workpiece 18. The large steps of the clamps 16 and 17 rest on elastic sleeves 19 and 20 and have limiting flanges 21. On each clamp 16 there is a fixture 22, and on the bottom its steps are made an additional step 23, forming a stop end 24. On the clamps 17, holes 25 are made under clamps 22.

The stamp works as follows.

The strip 18 is put on clamps 22 clamps 16. Include the working stroke of the press. At the beginning of the stroke, the clamps 16 and 17 compress the ends of the strip 18 and simultaneously come into contact with the surface 10 :: 12 of the projections 9 and 11. Next, the elastic sleeves 19 and 20 are compressed and at the same time the strip 18 is twisted with bending surfaces 14 and then the gauge surface 1 mi 13, while the lower clamps 16 abut against the abutting end 24 in the slab 8 of the lower working

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element, limiting the course of the clamps and ensuring the alignment of the longitudinal axes of the ends and the twisted part of the strip.

When the top plate is idle, the surfaces 13 and one with the other surfaces 10 and 12 come up out of contact with the part, after which the clamps 16 and 17 are opened and occupy the initial position, extending to the contact of their flanges 21 with the plates 8. The finished product is removed with clamps 22 clamps 16.

The bending forces appearing during twisting are offset by the protrusions 9, which greatly improves the quality of the products and ensures the reliability of the stamp.

It is possible to twist the strip at an angle of less than 90 °, for which it is necessary to perform the base surfaces of the clamps with a certain inclination to the horizon.

Claims (1)

Invention Formula A stamp for twisting the strip in two planes, containing upper and lower the plates connected by the guide clamps of the ends of the workpiece to the clamping elements and associated with the corresponding plate of the upper and lower working elements, characterized in that, in order to improve the quality of the products, each working element is made in the form of a plate with two pairs of protrusions vertically positioned calibrating and bending surfaces, with each pair of projections installed with displacement relative to the longitudinal plane of symmetry of the stamp and with the possibility of placing gauge surfaces of the upper and lower working elements with a gap along the plane of symmetry, and supporting ones without a gap; each clamp of the end of the workpiece is made in the form of upper and lower axially spring-loaded step clamps installed on plate of the corresponding work item, while on the bottom Step 0 of each lower clamp is made an additional step with a stop end to limit its movement. 2 1. FIG. 2