SU1274834A1 - Method of producing parts with relief cavities - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular, to a technology for the production of parts with embossed cavities. The aim of the invention is to reduce the energy consumption of the process and the development of technological capabilities. The extrusion process is carried out using a blank in the form of a regular prism with a multi-section and a highly plastic sleeve made of lead, copper or other materials. In the process of pressing the punch into the workpiece, the material of the workpiece is hardened, which contributes to an increase in the stress of all-round compression of the punch element. The resulting item is released from the cover, and the punch is removed. 2 Il.

Description

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The invention relates to the processing of metals by pressure and can be used in the manufacture of parts with embossed cavities, in particular molds.

The purpose of the invention is to reduce the energy consumption of the process and the expansion of technological capabilities.

FIG. 1 shows a scheme for implementing the method; in fig. 2 shows section A-A in FIG. one.

The method is carried out as follows.

In the hole of the matrix 1 mounted on the base plate 2 and made with two steps; the top is working and the bottom is receiving, placing the deformable workpiece 3 in the form of a regular multifaceted prism, and installing a punch 4 on top. In the gap between the punch 4 and the wall of the upper stage of the matrix 1, a highly plastic sleeve 5 made of lead, copper or other highly plastic solid materials and the pressure ring 6, and the height of the sleeve 5 and the pressure ring 6 on / g 4-6 mm more than the height of the punch 4, and the top of the press 7.

During the working stroke of the press actuator, the presser 7 moves downwards and, when the pressure ring 6 is reached, transfers pressure to the sleeve 5, which plastically deforms, while the pressure of all-round compression increases rapidly and when a certain amount is reached, the sleeve material starts to press into the segment gap 8 between the workpiece 3 and the wall of the upper stage of the matrix 1.

When the press 7 reaches the end of the punch 4, the punch is pressed into the workpiece 3 and the material of the sleeve 5 is simultaneously reduced to the segment gaps 8 between the workpiece 3 and the wall of the die 1, while the workpiece is in a thin shell of high-plastic material.

In the process of pressing the punch 4 into the workpiece 3, the material of the workpiece is hardened with a simultaneous radial flow of the workpiece material, as a result of which the segment gaps 8 between the workpiece and the die wall decrease, which

in turn, increases the stress of all-round compression on the punch 4 by increasing the extrusion resistance of the high-elastic material of the sleeve 5 through the segment gaps 8, thereby compensating for the increase in the specific forces of indentation on the punch 4 by hardening the workpiece material.

When the required extrusion depth is reached, the main mass - the material of the sleeve 5 is extruded into the lower - receiving stage of the die. The resulting part at elevated temperature is released from the shell of highly plastic material and remove the punch 4.

Extrusion of a cylindrical form cavity with a diameter of 25 mm to a depth of 45 mm is made in a billet of steel on a hydraulic press, while lead is used as the highly plastic material of the sleeve. As a result of the extrusion process, a high-quality product is obtained with a simultaneous decrease in the force of the indentation by 26% compared with the known method.

Claims (1)

Invention Formula A method of producing parts with embossed cavities, which consists in placing the workpiece in a matrix with a stepped hole, installing a bushing of highly ductile material on the upper end of the workpiece and applying a deformation force to the workpiece by means of a punch while acting on the sleeve, characterized in order to reduce energy costs process and expansion of technological capabilities, use the workpiece in the form of a regular prism with a polygonal cross section, inscribed in a circle formed cylindrical The upper surface of the die's upper stage, the pressure ring is installed on the sleeve, while the initial height of the sleeve and pressure ring is greater than the height of the punch, the process is carried out in two stages, first acting on the pressure ring and displacing the sleeve material into the segment gaps between the workpiece and the wall of the matrix and then forming a relief cavity.