DD292161A5 - METHOD FOR PRODUCING PREFERRED BELT BEARING RINGS ON MULTI-SPINDLE TREATMENT MACHINES - Google Patents

Abstract

The invention relates to a combined method of cutting and forming machining for the production of profiled rings, in particular of rolling bearing rings of relatively small size made of solid material on a multi-spindle turning machine, at cost and production zeitguenstigerem process. According to the invention, this is achieved by a simultaneously forming and machining in the spindle position I with subsequent machining in the following spindle positions of the multi-spindle automatic lathes. FIG {Multispindle lathe; Spindle bearings; Rings, profiled; machining; reshaping processing; Waelzlagerringe}

Description

For this 1 page drawing

Field of application of the invention

The invention relates to a combined method of machining and forming machining for the production of profiled rings, in particular of rolling bearing rings, of solid material on a multi-spindle automatic lathe.

Characteristic of the known technical solutions

Profiled rings, especially roller bearing rings, made of solid material or tube, are produced either purely by machining or in a combination of cutting and forming machining.

In the purely machining high-productive multi-spindle automatic lathes are used, the ring receives its final profile on the individual spindle positions of the multi-spindle. However, the process is material-intensive, since the ring is machined on all sides to the final profile ready for grinding. In addition, rolling bearings, produced by this method, a shorter life than those in which the profile or the raceway has been formed by forming and thus with a changed fiber profile.

In the combined method, a Vorwerkstück is first produced by machining, d. h., rod or pipe, a cylindrical ring is separated. Subsequently, this ring is profiled by axial or tangential rollers ready for grinding or it is still preceded by a chipping pre-processing.

Another production method provides for a combination of first forming and then machining on multi-spindle machines when using pipe material (DD-WP 225358).

A disadvantage has been found that in addition to the use of costly pipe material as semi-finished according to the chosen rolled profile in the pipe material significant, undesirable deformations occur, which subsequently experience several subsequent machining ', steps with different tools required for quality assurance.

Object of the invention

The aim of the invention is to eliminate as far as possible the disadvantages mentioned by a more cost-effective production method of preferably rolling bearing rings with a longer service life for the size range S 32 mm.

Explanation of the essence of the invention

The object of the invention is to produce needle-shaped profiled roller bearing rings of certain dimensions, advantageously equal to or smaller than 32 mm inner diameter, of solid material, or re-tensioning in the combined cutting and forming process on multi-spindle automatic lathes.

According to the invention the object is achieved in that in the spindle position I at the same time a forming machining for profiling the outer profile of the bearing ring and eino machining pre-machining of the bore is performed and then carried out in the other spindle layers a machining finishing including the separation of the profiled roller bearing ring profiled.

By this method, the deformations in the hole caused by the profile rolling, immediately eliminated.

For finishing, only one cut at the optimum depth of cut is required. embodiment The invention will be explained in more detail below on a Ausführungsbelsplel for producing a roller bearing inner ring.

The accompanying drawing shows a schematic representation of the working space of an advantageous four-spindle automatic lathe with the method steps corresponding to the spindle positions I to IV.

The spindle position I shows the production of the later roller bearing inner ring 8 according to spindle position IV. In this case, the rod material 1 is formed without cutting by an axial profiled tool 2 on the outer diameter so that the outer contour of the subsequent rolling bearing ring 8 is formed by grinding. Parallel to this, by means of, for example. Drilling tool 3, the bore of the

Rolling ring 8 pre-worked. In the spindle position II is carried out by a boring tool 4, the finishing of the bore

In the spindle position III, the inner contour of the roller bearing ring 8 is finished by means of a Inneneinstechwerkzeuges 6, while the separation of the finished profiled roller bearing ring 8 takes place by a cutting tool 7 in the spindle position IV.

Claims (3)

1. A process for the production of preferably roller bearing rings on multi-spindle automatic lathes made of solid material, characterized in that in the spindle position I simultaneously a forming machining for profiling the outer profile of the future rolling bearing ring (8) and a machining pre-machining of the bore and then in the other spindle layers a chipping Finishing including the separation of the rolling bearing ring (8) takes place. 2. The method according to item 1, characterized in that in the spindle position I of the multi-spindle automatic turning the Axialprofilwalzen and the bore production are used. 3. The method according to points 1 and 2, characterized in that forming and machining operations at the beginning of the same time and in the other spindle positions of the multi-spindle machines only a final machining of the future rolling bearing ring (8).