SU1637957A1 - Device for pressing comminuted metal articles - Google Patents

Abstract

The invention relates to powder metallurgy. The purpose of the invention is to increase productivity and improve product quality. The device is equipped with a locking-transition unit 7 with an internal hole of different taper. During operation of the operation device, the comminuted metal loading and pressing are combined in time, and the presence of a shut-off-transition block contributes to a better development of the deformable material, in connection with which the productivity increases and the quality of the products improves. 3 il.

Description

1

The invention relates to powder metallurgy, in particular to the production of compact articles made from crushed metal by means of hot deformation.

The aim of the invention is to increase productivity and improve the quality of products,

Fig. 1 is a diagram of the device at the time of extrusion; figure 2 - download the next portion of the crushed metal in the working channel of the container while simultaneously pressing the accumulated and briquetted metal from the output channel of the container; on fig.Z - pressing loaded crushed metal punch from the working channel of the container with simultaneous waste hollow ram and the accumulation of the pressed (briquetted) metal in the output channel of the container and the expiration through the channel matrix.

A device for pressing crushed metal products comprises a container 1 with two communicating workers 2 and output 3 channels made therein, a punch 4 housed in the working channel 2 and a hollow ram 5 with matrix 6 mounted in the output channel 3 of container 1. Work 2 and 3 output channels of the container 1 are perpendicular to each other, and between them a shut-off block 7 with a different taper hole is placed, connected by a wide part to the output channel 3, and narrow - to the working channel 2 of container 1 (figure 1).

The device works as follows.

Pre-cleaned and heated fragments of the crushed metal are loaded into the working channel 2 of the container 1, pressed by the punch 4, after which briquetting and pressing are simultaneously carried out through the shut-off conical block 7 into the output channel 3 of the container 1 while the hollow press-stamp 5 departs with matrix 6 and receiving the press product. Pressing punch 4 from working channel 2 of container 1 is performed by shifting with hydrostatic support (providing physical contact of the pressed fragments), the role of which is performed by the resistance of the channel of the matrix 6, contact friction force and resistance to pressing through the locking-transition conical block 7. When the pressed metal flows through the channel of the blocking-transitional conic block 7, the preliminary crushing and redistribution of oxides on the surface of the pressed fragments is ensured (with the formation and physical kim contact of juvenile surfaces) in such a way that the subsequent final deformation

metal through the channel of matrix 6 results in obtaining not less than the minimum level of stresses of all-round compression, at which high-quality plastic welding takes place

0 exit.

The removal of the hollow ram 5 with the die b is made with hydraulic support (on the drain) in the cylinder of the press (the press is not shown) so that in the zone

5, the die was maintained at the required pressure.

After squeezing out the entire volume of the crushed metal from the working channel 2 of the container 1, the punch 4 is retracted,

0 load and prepress the next portion of the crushed metal. Pressing during this period of time lead hollow press stamp 5 already pre-briquetted metal from the output channel 3 gan5 of the trainer 1 with obtaining the same final deformation (through the channel of the matrix 6), as in pressing the punch 4. Resistance of the conical channel of the stop-transition unit 7, large hole

0 connected to the output channel 3 of the container 1, ensures the impossibility of the flow of the pressed metal from the output channel 3 of the container 1 into the working channel 2 of the container 1 when it is overloaded

5 (figure 2).

After squeezing the entire volume of accumulated briquetted metal out of the output channel 3 of the container 1, briquetting and pressing the next portion of the crushed metal from the working channel of the container (with a hollow press ram) (fig. 3) is performed simultaneously. The pressing cycle is repeated.

5 Thus, the location of the working and output channels of the container is perpendicular to one another and placement between. they lock the transitional conical block, connected by its wide part

0 with the output channel, and narrow with the working channel of the container, allows us to make the process of pressing of the products from the crushed metal continuous, aligning the time of the loading operation

5 portions of the crushed metal in a container and briquetting it with pressing the product and thereby increasing productivity. Due to the better study of the material, the quality of the products obtained has been improved.

Claims (1)

Invention Formula A device for compressing articles of shredded metal, comprising a container with a working and an output channel, a punch placed in the working channel, and a hollow ram with a die installed in the output channel of the container, characterized in that, in order to increase productivity and increase neither the quality of the products, it is provided with a stop-transition unit with an internal hole made in the shape of two truncated cones with different angle of taper, facing each other with smaller bases, the unit being installed in the working channel of the container and facing with a larger taper to the punch , and the channels are perpendicular to each other. Schig.2. Editor O. Obsessive Compiled by B. Semenov Tehred M. Morgental 9g.Z Proofreader M. Muska