SU595032A1 - Method of operating a work-extruding tool - Google Patents

Description

one

The invention relates to the field of metal forming and can be used in the manufacture of rods and pipes on hydraulic presses.

A known method of operating a tool for extruding blanks consists in axial displacement of a ram together with a press washer towards the die and forming an annular gap between the die and the container for extruding the debris.

1. This method involves squeezing

pressost with open working hole of the matrix, and therefore the metal from the press residue enters the finished product and reduces its quality. It is applicable only to easily weldable alloys (aluminum) and cannot be used for pressing heavy non-ferrous metals (for example, copper).

The purpose of the invention is the possibility of carrying out a semi-continuous process of extruding heavy non-ferrous metal blanks.

This is achieved by the fact that simultaneously with the formation of a gap between the matrix and the container, the working opening of the matrix is blocked.

FIG. Figure 1 shows the tool in the process of moving a ram with a press washer to the die, longitudinal section; in fig. 2-

tool in the process of forming a gap between the matrix and the container, a longitudinal section; in fig. 3 shows section A-A in FIG. 2

The extrusion process on the tool being described is carried out as follows.

The ingot 1 placed in the container 2 is compressed with a conical press washer 3, stitched with a needle 4 and pressed into the working channel 5 of the cone matrix 6 installed on the die holder 7 by forward movement of the pin 8, rigidly connected with the cone press washer 3 having a protrusion 9 corresponding to the working channel 5 with a height equal to the thickness of the press residue. The annular gap 10 between the container 2 and the die b is at this time closed by the knives 11, and the metal of the ingot 1 is squeezed into the working channel 5 in the form of a press assembly 12 (see Fig. 1, position 1) until the protrusion 9 comes up to the worker the channel 5 of the matrix 6 (see Fig. 1, half a century II), the press article 12 is thus separated from the press residue 13, while the knives 11 move away, moving in the radial direction (see Fig. 3) and open the gap 10 (see Fig. 1, position III). The metal of the press residue 13, with further movement of the press washer 3, is squeezed as far as it goes into the annular gap 10 in the form of waste 14, which dissolves when it leaves the stationary wedge knives 15

on the belts 16. Then the knives 11 are closed, the separation of the waste 14 from the secondary pressure valve 17, which remains in the container (see Fig. 2, position IV). When the knives 11 are opened, the waste 14 in the form of tapes 16 is freely inserted into the box installed for them. After the blades are closed and the shnlinton 8 is withdrawn with a 3B nressshiba, the initial position is pressed. The secondary mass press 17 remaining in the container 2 does not affect the quality of the press products, since it has the shape of an inverse cone, and the ingot metal in contact with it does not expire into the working channel 5 of the matrix 6, during the pressing cycle it has time to warm to the temperature of the ingot and is easily squeezed out into the annular gap 10 in the next cycle with the next pressure control, etc.

The use of the proposed method of operation of the tool for extrusion allows increasing the quality of the products when pressing any non-ferrous metals, including copper.

Claims (1)

1. USSR author's certificate №472713, cl. At 21C 23/08, 1972. f W S S 1 3 J 2 S -. /  one y // // 1: And no. 2 . -.eleven