SU1691089A1 - Apparatus for taper rolling - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to cross-rolling, and can be used for the manufacture of parts such as stepped shafts. The device consists of upper and lower plates with fixed main wedges (OK), additional wedges (DK) 6, dividing knives 3, additional dividing 1 knives (DRN) 4 and catchers 8. At the same time OK, DK 6 and DRN 4, located on the top plate, are displaced relative to each other by the value of I p (H - 2h) / 2, where I is the offset value, H is the height of the device closed, h is the height of the catcher. The billet enters the rolling zone, where it is divided into two billets by dividing knives 3. Next, one of the billets, without stopping, is divided into DRN 4 into two billets. Another billet is held by the catcher 8 until the upper NRN 4 approaches. When the billet is seized by the upper wedge, the catcher releases the billet. After separation, the four blanks are displaced relative to each other and are deformed unhindered by two pairs of OK and Daum with pairs DK6. The invention allows to increase productivity by simultaneously rolling more than two blanks, as well as the quality of products due to the displacement of wedges, which ensures unhindered deformation of the blanks, and by supplying the device with spring-loaded catchers that orient the blanks in the rolling zone, 3 sludge. sl s o y o 00 y

Description

The invention relates to the processing of metals by pressure, in particular to transverse steel, and DGR can be used in the manufacture of parts such as stepped shafts.

The purpose of the invention is to improve product quality and productivity.

FIG. 1 and 2 show a cross wedge rolling device comprising upper and lower plates, respectively; Fig. 3, fixation of the preform on the catcher.

The device consists of the upper movable 1 and lower fixed 2 instrumental plates, on which the main ones are installed: 3 and additional 4 separating knives, main 5 and additional C knits, which have lead-in, forming and calibrating sections. immediately after the dividing knife 3, and on the top plate - with the displacement of the legs relative to each other by distance I. The main and additional wedges on the bottom plate are installed in one row immediately after the additional dividing ozhami, and similar additional separating chozham on the top plate are offset relative to each other / oassto to set. In the proposed device for fixing the workpiece 7, after separation, catchers 8 are inserted, installed in the grooves of the lower plate on the sides of the additional separating knives and the main and additional wedges and spring loaded 9.

The device works as follows

The workpiece 7 enters the rolling zone, where, due to the translational movement of the use of the pipe fixed on the tool plates 1 and 2, it dies away with a dividing knife 3 and then split ne two. After separation one of the blanks continues the rotational movement and is deformed by an additional dividing knife 4 The other blank is fixed in the area of the next additional separating knife 4 and is removed by the catcher 8 until the upper additional separating knife, which is displaced regarding

another knife by I

t

2 h)

. Pomi. Catchers are mated with additional dividing knives along their face surfaces, as well as installed in the area of the lead-in sections of the main and

additional wedges, and fix the workpiece by the spring 9, which pushes the catcher into the zone of contact with the workpiece. When the workpiece is gripped by the upper wedge tool under the action of a component strut force, the spring is deformed and the catcher releases the workpiece with simultaneous introduction by the bottom wedge tool. End surfaces of the workpiece after separation by knives

They take the form of a cone, which allows, in the process of profiling by wedge tools, to obtain flat ends on the workpiece without the formation of an earhook. This eliminates the need for end-trimming.

The cross-wedge rolling device allows to increase productivity due to the possibility of rolling several forgings from one billet simultaneously in a single pass of the tool plate, as well as the quality of products due to the displacement of additional separating knives and wedges relative to each other, which allows the billets to deform unhindered, and supplying the device with catchers, ensuring the fixation of the position of the workpiece before rolling.

Claims (1)

Invention Formula A device for cross-wedge rolling, containing upper and lower parallel plates mounted on a bed with the possibility of reciprocating movement a pair of mating main wedges with entry, deforming and calibrating sections, as well as main separating knives installed in the plane of symmetry of the device, characterized in that, in order to improve product quality and productivity, it is equipped with two pairs of additional wedges, each of which is set to a corresponding the plate is parallel to the main wedge and is coupled to them along the side surfaces, with two pairs of additional separating knives, each of which is installed. on the corresponding plate After separation by an additional separation, 55 formed by one of the main and the working blades of the workpiece are displaced relative to each other by distance I, which allows them to deform unhindered in the opposite direction by the main 5 and additional 6 wedges of additional wedges in the plane passing through the plane of their mating and spring-loaded catchers located in the bottom slabs parallel to its plane of symmetry in zones the lead-in sections of the main and additional wedges and in the areas of additional separating knives, while the separating knives on both plates are installed in front of the main separating additional knives, and the additional separating knives, the main and additional wedges located on the upper plate, are offset from each other Vj along the slab symmetry plane by . (H-2 h I where I is the displacement amount; H - closed device height; h - the height of the catcher.