RU1794575C - Press tool for stamping ribbed forgings - Google Patents

Abstract

SUMMARY OF THE INVENTION: the stamp comprises a punch, a clip, a die with a .2 mi insert, an ejector associated with a press pusher. The liners are located in the wedge-shaped grooves made in the matrix, and one of the surfaces of each groove coincides with the side surface of one of the transverse streams, and the generators of the second surface are made with a slope towards the vertical axis of the stamp. The liners are made along the length of individual sector elements in contact with each other. The end planes of each second element in contact with neighboring elements are made with a slope towards the vertical axis of the stamp and are located at an angle to each other, the apex of which is directed towards the forging. 1 s, par. F-ly, 2 ill.

Description

The invention relates to the processing of metals by pressure and can be used in the development of a special panel tool.

A stamp is known for volumetric stamping of products with ribs, containing upper and lower halves with preliminary and final arms with cavities made in each of them for forming ribs and intercostal drains and equipped with special bridges with certain parameters located between the index cavities ..

The described construction is intended for multi-transition stamping of coarse

forgings with large stamping slopes and cannot be used to obtain forgings of complex configuration without stamping slopes and with specified rib sizes.

A stamp is known for stamping forgings with fins, adopted as a prototype and containing a punch, a clip, an ejector connected to the press pusher, on which a matrix with inserts is fixed, on the surface of which vertical and transverse streams are made.

The construction described has disadvantages. When stamping, the dimensions of the rib rib are determined by the amount of elastic deformation of the structure, which is difficult

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can be taken into account, which makes it difficult to obtain ribs with specified dimensions, movable liners associated with the ejector complicate the design and work with it. In addition, the design is applicable mainly for the manufacture of flat parts (panels) and cannot be used to obtain curved finned surfaces with a large radius of curvature such as various bottoms (spherical, conical, cylindrical, etc.)

The aim of the invention is to expand the technological capabilities of the stamp by making it possible to obtain forgings of bottoms such as shells of revolution with orthogonal ribbing without stamping slopes and at the same time ensuring their defect-free extraction.

This goal is achieved by the fact that in the stamp for stamping forgings with finning, containing a punch, a clip, an ejector connected to the press pusher, on which a matrix with inserts is fixed, on the surface of which vertical and transverse streams are made, vertical and transverse streams are made in the matrix, vertical and transverse streams are made in the matrix, curved grooves are made in the matrix, the inserts are located in these grooves, while one of the surfaces of each groove coincides with the side surface of each groove coincides with the lateral surface of one of the transverse streams, the second surface forming is sloped towards the vertical axis of the stamp, and the liners are made along the length of individual sector elements in contact with each other.

In addition, the end planes of each second element in contact with neighboring elements can be made with a slope towards the vertical axis of the stamp and are located at an angle to each other, the apex of which is directed towards the forging.

In FIG. 1 shows a device for stamping forgings of spherical bottoms with orthogonal finning; figure 2 is a view of figure 1. The stamp includes a punch 1, a clip 2, a pusher 4 connected to the press pusher 3, on which a matrix 5 is fixed with inserts 6. Vertical and transverse streams of the engraving of the stamp are made on the surfaces of the matrix 5 and inserts 6. On the matrix 5, in addition, wedge-shaped grooves 7 are made, the outer surface 8 of which coincides with the lateral surface of the transverse streams, and the inner groove 9 is made with a slope towards the vertical axis

stamp (i.e., grooves 7 are formed in this case by conical surfaces).

The liners b in section have a profile that matches the profile of the corresponding groove and rests on its side surfaces 8 and 9. wherein each liner 6 is made of individual sector elements 10 (in this case of 4) end planes 11, which are in contact

by myself.

In addition, the end planes 11 of each second sector element 10 of each of the inserts 6 can be made with a slope towards the vertical axis of strain 5 and are located to each other at an angle whose apex is directed towards the forging. Position 12 denotes a forging (not shown in figure 2). It must be emphasized that the number of sector elements

0 10 of each insert b and the location of the connectors are determined constructively for a particular design and depend on the number, size and configuration of the forging ribs.

5 The construction is used as follows.

On the stamp in the grooves 7 of the matrix 5, connected with the ejector 4 located in the holder 2, set the sector elements 10 inserts b, which, contacting each other along the end planes 11 and tightly pressed due to the wedge shape to surfaces 8 and 9 grooves 7. form with the matrix 5 a continuous forming surface with streams of engraving of the stamp. Then, the die is heated (a heater is not shown), a blank is placed in it, and the forging 1 is stamped by the course of punch 1. After lifting

0 of the punch 1, by pushing the press pusher 3 upwards through the ejector 4, the matrix 5 with forging 12 is lifted over the yoke 2 and, laying under the flange of the package 12 any emphasis in FIG. not showing backwards, the yanks 5 of the strawberries 4 remove it from the matrix 5. which goes down. While the liners 6 due to friction are removed from the grooves 7 and remain on the ribs of the forging 12. After that, the liners b are removed from the forging 12 sequentially

0 by extracting their sector elements 10 towards the geometric center of the forging (i.e., along the axis of symmetry of the element inward and down along the ribs). In this case, the first to remove the elements 10, the end planes 11 of which are made to each other at an angle with the apex in the direction of the forging 12 (i.e., not adjacent to the forging by the neighboring elements 10). In practice, as a rule, the elements 10 fall out of the forging 12 themselves when it is cooled, when cooled

forgings or its slight shake (depending on the forging material, liners, etc.).

Thereafter, the inserts 6 are reinserted into the slots 7 of the matrix 5 and the described stamping process is repeated again.

The use of the proposed device in comparison with the prototype allows to obtain forgings of bottoms such as shells of revolution with orthogonal finning. both on the inner and the outer surface, and to ensure their defect-free extraction from the stamp due to:

0

making wedge-shaped grooves on the matrix, one of the surfaces of which coincides with the lateral surface of the transverse streams of finning engraving;

installation of liners in these grooves made along the length of individual sector elements in contact with each other by end planes;

making said end planes of each second element of the end planes of each second element with a slope towards the vertical axis of the stamp and at an angle to each other, the apex of which is directed towards the forging.

Claims (2)

SUMMARY OF THE INVENTION 1. A stamp for stamping forgings with finning, comprising a punch, a clip, an ejector connected to a press pusher, on which a die is fixed with inserts on the surface of which vertical and transverse streams are made, characterized in that, in order to expand the technological possibilities by providing forgings of bottoms such as shells of rotation with orthogonal finning without stamping slopes and while ensuring their defect-free extraction, wedge-shaped grooves, inserts of races are made in the matrix laid in these grooves, with one of the surfaces of each groove with the side surface of one of the transverse streams, the second surface forming with a slope towards the vertical axis of the stamp, and the liners are made in length from individual sector elements in contact with each other. 2. The stamp according to claim 1, characterized in that the end planes of each second element in contact with adjacent elements are made with a slope in the side of the vertical axis of the stamp and are located one at the other at an angle whose apex is directed towards the forging. b / &). Ј