SU1466857A1 - Arrangement for cross rolling - Google Patents

Abstract

The invention relates to the processing of metals by the method of cross wedge rolling of parts such as stepped shafts. The goal is to increase durability by increasing the durability of guide wiring and the quality of the received products. Rolled billet 12 is placed between the work rolls. Working wedges, having a horizontal calibrating surface and deforming inclined surfaces, are embedded in the workpiece 12, the metal is displaced and sags 13 are formed. To ensure the lateral displacement of the workpiece 12, it is supported by guide wires consisting of a fixed base 8 and insert (B) 9 made in the form of a cylindrical roller. In order to eliminate the interaction of the roller with the influx of metal 13 on the workpiece 12, the grooves 11 are made on the roller, and their iris is equal to the width of the horizontal gauge surface of the working wedge in the calibration section. This implementation of the rollers eliminates the increase in axial forces in the workpiece 12 and its gap. Thanks to the performance of B 9 in the form of p (htik it slides over the workpiece 12, did not leave scratches on its surface. 3 ill. O (L

Description

FIG. 2

The invention relates to the processing of metals by cross-wedge rolling, and in particular to a tooling for producing parts such as stepped shafts.

The goal is to increase durability by increasing the durability of guide wiring and the quality of the products obtained.

FIG. 1 shows a diagram of the process of cross-wedge rolling work rolls; in fig. 2 is a section A-A in FIG. one; in fig. 3 - sweep the work roll.

The device contains two working rolls 1 and 2, made with gripping sections 3, shaping 4 and calibration 5. On the roll there is a working wedge with horizontal calibrating surface 6 and deforming inclined surfaces 7. The device also contains guide wiring, each of which is made of the fixed base 8 and the insert 9 associated with it. The insert 9 is made in the form of a cylindrical roller mounted in a groove 10 made in a stationary location 8. The rollers 9 are made with a groove 11, the width of which is 1 izon- tal calibrating wedge surface 6 of the working portion 5 at calibration.

The device works as follows.

The rolled billet 12 places — between rolling rollers 1 and 2. When the rolls are soared, the forming wedges are inserted into the billet 12. At the same time, in the direction perpendicular to the direction of deformation, the metal is expelled beyond the original, the diameter of the billet and thus sag: ;

In order to eliminate the (1) reticule of the workpiece blank, it is supported by guide wiring consisting of base 8 and insert 9 in the form of a hydraulic roller, which is the axis of the axis of the working part of the wiring.

In order to exclude the interaction of the roller with the influx of 13 metal on the rolled metal rolling1-1c:) Irots chkk P.

In order to increase the durability of the roller, the groove must be made triangular so that its profile is close to the geometry of the influx of metal on the workpiece. In this case, abrupt transitions of the diameter of the roller are excluded and, consequently, the stress concentration on the surfaces of the roller decreases. Sliding friction is replaced by rolling friction due to the use of a cylindrical roller that rolls over the surface of the part and is replaced in the slot on the base of the nodka. Contact pressure in the socket 0

five

5 d 25

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dz

50 vanilla is much smaller than on the surface of the part, since with the same force the contact area of the roller with the base covering the roller around the circumference is several times larger than the area of contact of the roller with the part.

In the process of rolling, the roller, interacting with the rolled part, slides in the nest of the base and does not leave scratches on the surface of the part, as it rotates with it. In addition, when rolling a profile in the forming section of the rolls, the workpiece is deformed and the part of the metal is expelled beyond the original diameter of the workpiece. Later on, in the calibration section, the shape of the part is corrected, but this metal flow is of fundamental importance for the cross-wedge rolling process.

If the roller is made in the form of a smooth cylinder, then the displaced metal will be pressed against the surface of the roller. This leads to an increase in axial forces in the workpiece and its rupture. In order to ensure proper metal flow during roll-up of the profile in that part of the roller, which is adjacent to the deformation zone of the workpiece, minor points are made to prevent contact of the metal displaced from the deformation zone with the roller.

Thus, increasing the durability of guide wiring and the quality of rolled parts is ensured by the fact that the working part of the wiring is made in the form of a cylindrical roller freely rotating in the socket of the wiring base and the roller has a groove.

Form u l and out of shadow

The device; um of the transverse-clip roller containing work rolls made with V gripping, shaping and ka sections. There are treads with a working wedge located on them, having a horizontal calibrating 1. ux) surface and deforming inclined surfaces, and guide wiring, each of which is made of a fixed base and an insert with a higher hardness than the base , characterized in that, in order to increase durability by increasing the wear resistance of guide wiring and the quality of the products obtained, the insert is made in the form of a cylindrical roller mounted in a groove for rotation , made in a fixed base, while the roller is made with a groove, the width of which is equal to the horizontal calibration gauge of the working wedge in the calibration section.

12

Shaping

FIG. R

Claims (1)

Claim A device for transverse wedge rolling comprising work rolls made with gripping, shaping and calibration sections with a working wedge located on them having a horizontal calibrating surface and deforming inclined surfaces, and guide wires, each of which is made of a fixed base and an associated insert from a material with a higher hardness than at the base, characterized in that, in order to increase durability by increasing the wear resistance of the guide wires and the quality In order to obtain the products, the insert is made in the form of a cylindrical roller mounted in a groove with the possibility of rotation made in a fixed base, while the roller is made with a groove, the width of which is equal to the width of the horizontal calibrating surface of the working wedge in the calibration section. FIG. 1 ,, Formative 5 L  plot Λ '3 ) „- / 2S --— ¹ - ! 7 7 / 6 ί 1 Fig.Z