SU1016011A1 - Method of producing articles such as envelopes on rod blanks and female die for performing same - Google Patents

Abstract

1. A method of manufacturing products of the type of shells on core blanks, consisting in deforming a cylindrical billet with axial force, displacing in the radial direction and moving it in the axial direction, characterized in that, in order to reduce metal consumption, improve product quality and process performance, the deformation takes place the inner and outer layers of the workpiece are cut at the same time, and the bottom of the part is formed from the inner layer, and from the outer one is extruded dissolved shell stage. 2. A matrix for carrying out the method according to claim 1, consisting of a body having an axial hole with a cutting edge, wherein the upper outer part (L of the matrix body is made as an annular knife with a diameter greater than the diameter of the lower outer part i opnyca matrices. a:

Description

The invention relates to the processing of metals by pressure, in particular the production of cylindrical hollow parts with double walls.

A known method of manufacturing hollow parts with a double wall is that the billet from a sheet material in a cold state is first subjected to a straight stretch, and then it is curved and a second wall 1 is obtained.

The disadvantage of this method is the high consumption of metal.

A known method for manufacturing shells-type products on core blanks consists in deforming a cylindrical billet by axial force, displacing the metal in the radial direction and moving it in the axial direction 2.

The disadvantage of this method is that the resulting products are of poor quality, since the defective layers of the workpiece are inherited in the material of the shell steps.

A known matrix consisting of a cylindrical body with an axial bore provided with a cutting edge on the surface facing the workpiece 3.

However, using this matrix, it is impossible to remove the outer defective layer of the workpiece.

A known matrix for hollowing parts, consisting of a body having an axial bore with a cutting edge 4.

However, using this matrix, it is impossible to reversely draw and remove the external defective layer of the workpiece.

The aim of the invention is to reduce metal consumption, improve product quality and process performance.

This goal is achieved by the fact that according to the method of manufacturing products like shells on rod blanks, consisting in deforming a cylindrical billet with axial force, displacing the metal in the radial direction and moving it in the axial direction, the deformation is carried out by piercing, simultaneously cutting the inner and outer layers of the billet , moreover, the bottom of the part is formed from the inner layer, and the shell step is obtained from the outer layer by reverse extrusion.

A matrix for the manufacture of hollow parts with a double wall consisting of a body having an axial bore with a cutting edge, besides; the upper outer part of the matrix body is made in the form of an annular knife with a diameter greater than the diameter of the lower external part of the matrix body.

FIG. 1 shows a matrix; in fig. 2 scheme of implementation of the method.

 The matrix consists of a housing 1 provided with an axial bore 2. The upper outer edge 3 of the housing 1 is designed as an annular knife. The diameter of this edge (top) is 7-12 mm larger than the diameter.

5 outer (lower) edge 4 of the housing. The matrix 5 is installed in the stamp and interacts with the punch 6.

Example. The floor of the aluminum billet obtained by centrifugal casting,

0 with a size of 80x30x100 mm, in a hot condition it is cut on the matrix 5 to remove the internal defective layer near the surface of its central hole with a punch 6 with a diameter of 38 mm on a 250 cf hydraulic press. Moreover, the cut (stitched) inner defective layer is used to form the bottom of the glass, i.e. it is pressed at the end of the blank, the outer defective layer of the blank is used to form the second wall of the part. With

In this, the productivity is increased by 1.5-2 times due to the execution of the whole process in one stroke of the punch. Further, the obtained cup, with a further increase in the stroke length of the punch 6, is simultaneously subjected to forward and backward drawing. And

The 5 straight drawing is carried out with the aid of a punch, and the back drawing with the aid of a punch and die 5, which has an axial bore 2, the upper outer edge 3.

As a result, a cylindrical part with a hollow cavity and a double wall is obtained (Fig. 5), with the outer effective layer of the workpiece forming the second wall, and the inner one forming the bottom of the part.

5 The shear force of the internal defect layer of the workpiece is 55 tons, and the direct and reverse drawing is 34.6 tons.

The proposed method allows reducing the metal consumption by 10-15% due to the use of defective layers of the workpiece.

Claims (2)

1. A method of manufacturing products such as shells on core blanks, which consists in deforming a cylindrical workpiece by axial force, displacing the metal in the radial direction and moving it in the axial direction, characterized in that, in order to reduce metal consumption, improve product quality and process performance, deformation carried out by flashing, while simultaneously cutting off the inner and outer layers of the workpiece, the bottom of the part being formed from the inner layer, and the floor from the outer by reverse extrusion chayut stage shell. 2. The matrix for implementing the method according to π. 1, consisting of a body having an axial hole with a cutting edge, characterized in that the upper outer part of the matrix body is made in the form of an annular knife with a diameter exceeding the diameter of the lower outer part of the matrix body.