RU2342212C2 - Method for manufacture of wheel disk - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: blank is cut from sheet and curled in ring. Ends of blank is welded in a butt joint with provision of cylindrical shell. Disk profile is formed on part of shell by cold rolling with roller on mandrel in reeling machine. At the same time disk wall subject to adjacency with wheel rim is thinned. Then part of shell that is left from formation of disk profile is transformed by cold rolling into plane of disk seat that has central opening.

EFFECT: higher quality of item.

Description

The present invention relates to the field of metal forming and may find application in the manufacture of disks for wheel rims of vehicles.

A known method for the production of wheel disks by cold stamping (RU, AS No. 1442303, B21D 53/30, 04/13/1987, publ. 07/12/1988). The method is carried out by obtaining a workpiece by cutting from a sheet workpiece, curling it into a ring, butt welding the ends of the workpiece to obtain a cylindrical shell, forming a disk profile on the side of the shell while thinning the disk wall to be mated with the wheel rim, and converting the shell into the plane of the disk seat, having a central hole.

The disadvantage of this method is that the formation of the disk is carried out by the method of crimping and distribution, which reduces the reliability of the disk.

The specified method is selected by the applicant as the closest analogue (prototype).

The technical problem solved by the author of the invention is to improve the quality of the product by ensuring the equal stress state of the entire disk due to the formation of a cold-rolled profile.

The problem is achieved in that in a method of manufacturing a wheel disk from a sheet blank, including cutting a blank from a sheet, curling it into a ring, butt welding of the ends of the workpiece to obtain a cylindrical shell, forming a disk profile on the side of the shell, while simultaneously thinning the disk wall to be mated with the rim of the wheel, and the transformation of part of the shell into the plane of the seat of the disk having a Central hole, according to the invention, the formation of the profile of the disk with simultaneous thinning of the wall the bottom rolling by the roller on the mandrel in the rolling machine, and the part of the shell remaining from the formation of the disk profile is subjected to conversion to the seat plane, which is produced by cold rolling after forming the disk profile.

The formation of the disk profile with the simultaneous thinning of the wall by cold rolling of the shell along the roller along the mandrel of the rolling machine is technologically advanced and makes it possible to ensure the uniformly stressed state of the entire disk.

Converting the remaining cylindrical part of the shell into the plane of the saddle by bending the edges of the shell inward by cold rolling allows at the same time to form a central hole on the plane of the disk seat, which technologically eliminates metal loss, for example, by cutting a similar hole if the disk is made by known methods, for example stamping from sheet blanks.

As a result of the patent research, no similar technical solutions were identified, characterized by the claimed combination of features, which allows us to conclude that the claimed technical solution has a "novelty" and "inventive step", can be used in industry, i.e. is “industrially applicable”.

At one of the enterprises of Chelyabinsk made and tested prototypes of disks for wheels of vehicles obtained by the claimed method.

The essence of the method is as follows.

A sheet metal blank is curled into a ring, butt welded, to obtain a shell that is mounted on a rolling machine, cold rolling of the cylindrical part of the shell with a roller forms a disk profile along the mandrel with simultaneous thinning of the wall of the shell, which will later be mated with the wheel rim, the remaining cylindrical part of the shell of the cold By rolling, they transform into the plane of the seat of the disk with the simultaneous formation of a central hole on it.

The method is as follows.

Strips of the required size are cut from sheet metal, depending on the required size of the disks.

A strip of metal of the required size is curled into a ring on a curling machine, forming a cylindrical shell.

Then the ends are straightened at the junction of the shell and butt welded by flash butt welding. After welding, the cut-off is cut and the ends are adjusted along the radius, giving the shell a uniform cylindrical surface.

Then, the obtained cylindrical shell is mounted on a rolling machine, and a disk profile is formed by rolling with a roller along the mandrel, thinning the cylindrical part of the disk to form a cylindrical girdle for later coupling with the wheel rim.

After that, the remaining cylindrical part of the shell by cold rolling is converted into the plane of the disk seat, on which the central hole of the disk is formed.

After the disk is formed, i.e. corresponds to the drawing dimensions, drill mounting holes, bore a central hole, punch ventilation holes around the perimeter of the disk. Barbs are cleared on them.

Thus, the claimed method is technological, economical, because allows you to make wheel disks for vehicles with minimal metal waste in the manufacturing process.

Claims (1)

A method of manufacturing a wheel disk from a sheet billet, including cutting a billet from a sheet, curling it into a ring, butt welding of the ends of the billet to obtain a cylindrical shell, forming a disk profile on the side of the shell while thinning the disk wall to be mated to the wheel rim, and converting part of the shell in the plane of the disk seat having a central hole, characterized in that the formation of the disk profile with simultaneous thinning of the wall is carried out by cold rolling by a roller on a mandrel in a rolling th car, and the transformation of the disc seat plane, which is produced is rolled after cold forming the profile disc is subjected to the sleeve portion remaining from the formation of the profile disk.