DD292162A5 - METHOD FOR PRODUCING PREFERRED BELT STORAGE RINGS FROM TUBE MATERIAL - Google Patents

Abstract

The invention relates to a combined method of cutting and forming machining for the production of loop-shaped profiled rings, in particular of rolling bearing rings made of pipe material in single or double operation on multi-spindle automatic lathes. With the aid of the highly productive and material-economical method, rolling bearing rings with an error-free surface can be produced. According to the invention, this is achieved by pre-machining the inside and outside diameters of the pipe end in the first spindle position, while in the second spindle position, forming takes place, which can be realized in a simple or double operation in accordance with the available number of spindles. FIG {Multispindle lathe; Spindle position; machining; reshaping processing; Waelzlagerringe; flawless surface; profiled rings}

Description

For this 1 page drawing

Field of application of the invention

The invention relates to a combined method of cutting and forming machining for the production of loop-shaped profiled rings, in particular of rolling bearing rings made of pipe material in a single or double sequence on multi-spindle automatic lathes.

Characteristic of the known technical solution

The production of profiled rings, especially rolling bearing rings made of solid material or pipe, either purely by machining or in a combination of cutting and forming machining.

In certain combined processes, a preliminary workpiece is first machined, that is, a cylindrical ring is severed from the rod or tube. Subsequently, this ring is profiled by axial or tangential rollers ready for grinding and still preceded by a chipping pre-processing.

These methods are production-consuming compared to a complete machining due to an all-round turning for the production of Vorwerkstückes and require additional Umspannvorgänge and washing processes.

Another manufacturing method provides a combination of first forming and then machining on multi-spindle automatic lathes in a simple sequence using pipe material before (DD-WP 225 358).

Due to the lack of external or internal machining, rings produced by this process have a relatively large dispersion of the mass or the volume. In addition, a rolling or molding of macrocracks in the production can not be excluded.

Object of the invention

The aim of the invention is to eliminate as far as possible the disadvantages mentioned by providing a more cost-effective production method for preferably roller bearing rings made of tubular material, with higher productivity, dimensional tolerance and surface quality.

Explanation of the essence of the invention

The object of the invention is to combine the advantages of Axialprofilwalzens with respect to the material economy with the highly productive machining technology for the production of profiled roller bearing rings profiled in single or double operation on multi-spindle turning machines.

According to the invention, the object is achieved in that in the spindle position I, a machining on the inner and outer diameter, in the II.Spindellage a reshaping profiling of the future rolling bearing ring, while in the other spindle positions a final machining and finishing including the separation of the sanding profiled rolling bearing ring is carried out in simple or double work sequence.

According to the invention, a highly productive and material-economically favorable manufacturing process for rolling bearing rings made of pipe material on multi-spindle automatic lathes is thus realized in simple or double sequence.

Ausführungsbelsple!

The invention will be explained in more detail below using an exemplary embodiment for producing a roller bearing inner ring. The accompanying drawing shows a schematic representation of the working space of an advantageous four-spindle turning machine with the method steps corresponding to the spindle positions I to IV.

The spindle position I shows the machining of the later roller bearing ring 8 according to spindle position IV. In this case, the tube material 1 is replaced by an over-turning tool 2 at the outer diameter and by a rotary cutter 3 at the inner diameter

prepared for axial profile rolling. Subsequently, in the spindle position II, the outer profile of the roller bearing ring 8 is rolled by means of an axial profile rolling tool * 4 in a loop-like manner.

In the spindle position III, the facing takes place by means of a facing tool 5 of the pipe material 1 facing away

Planar surface of the rolling bearing ring 8. In parallel, the machining finish machining of the inner contour by a Inneneinstechwerkzeug 6. The separation of the finished profiled roller bearing ring 8 from the pipe material 1 is realized in the spindle position IV by a Abtrennwerkzeug 7

 In a eight-spindle automatic lathe, the procedure is analogous.

Claims (2)

1. A process for the preparation of preferably roller bearing rings made of pipe material on multi-spindle automatic lathes, characterized in that in the spindle position I a chipping pre-machining or finishing on the inner and outer diameter of the tube for the future rolling bearing ring (8) and in the spindle position Il a forming machining for the preparation of External profiles of the Wäl Jagerringes (8) and then in the other spindle positions a machining finishing including the separation of the rolling bearing ring (8) from the tube material (1). 2. A process for the production of rolling bearing rings according to item 1, characterized in that the processing of the rolling bearing ring (8) is carried out according to the method in a simple or double sequence.