DE965901C - Process for the manufacture of rolls for block rolling mills with increased gripping ability - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

LIBRARY

OF

PATSJfM fiSTS

ISSUED JUNE 27, 1957

GERMAN PATENT OFFICE

PATENT LETTERING

CLASS 7f GROUP 10 INTERNAT. CLASS B 21 h

Gupi2lb / 7f

2> r. = # Ng. Wilhelm Stich _r Bochum

has been named as the inventor

Bochumer Verein für Gußstahlfabrikation Aktiengesellschaft, Bochum

Process for the manufacture of rolls for blooming mills with increased gripping ability

Addendum to patent 963

Patented in the territory of the Federal Republic of Germany on June 6, 1953

The main patent started on June 29, 1951

Patent application published March 8, 195 &

Patent issued June 13, 1957

The subject of patent 963 953 is the use of rolls known per se with transverse grooves, which is caused by a cutting in the rolling process, engaging tangentially on the outer surface Tools are produced as rollers in block rolling mills to increase the gripping ability, these transverse grooves are less than ι mm deep and are close to one another. On the one hand, such rolls do not cause any damage to the roll bar surface and are sufficient thus the current demands on their quality, on the other hand they guarantee a sufficient "Service life" of the individual elevations or depressions attached to the rolling pass. It was here exploited the knowledge that even very small, in the rolling pass transverse to the rolling direction

709562/68

Any depressions or elevations made have a good gripping ability and a sufficient one Have durability if they are created by a rolling process in the sense of gear theory S are.

You can now roll the aforementioned type in a particularly simple, cheaper and cheaper way produce if, according to the present invention, for example, the depressions by pressing of the teeth of a gear-like tool into the meat of the caliber in order to this way the recesses in the caliber in the sense of the gear theory according to the method to be brought in according to the main patent. With such a processing of the rolling pass. themselves show that the easy detachment of the rolling rod from the recesses made in the rolling pass not only results in their increased durability, but the latter in general on one ao particularly favorable and perhaps even increased longitudinal flow of the rolling stock in the rolling pass is close. Such tooth-like tools, for example in the form of of pressure rollers mounted in a holder similar to a turning tool, very large in terms of their dimensions can be kept small, whereby the production of the depressions in the rolling pass without use special machine tools or additional devices easily on the normal Roller lathe can be done. The tool . can be placed side by side several times in one caliber be engaged. In this way, in the caliber - apart from the adjacent, a broadening in the caliber of already counteracting depressions - intermediate, rings that run parallel to one another and that have remained raised are created, which additionally counteract the broadening in the caliber. The width of these parallel to each other 4.0 running raised rings, the dimensioning of which you have in hand, then there up to about only 0.5 or 1 mm, without thereby affecting the spreading or holding - the availability of these rings somehow suffers. It's not just about gearing gears and (when knurling workpieces, but also when manufacturing RifEel cylinders for ring spinning machines, also when making recesses and breakthroughs in cylindrical and hollow cylindrical bodies, and finally when profiling made known by mill rollers, round cylindrical workpieces by pressing z. B. To provide gear-like profiled tools in the workpiece surface with indentations. It is also known to carry out such impressions on the same workpiece axially next to one another several times to be repeated until the entire workpiece is profiled. In this regard, were even the indentation zones are spaced a certain distance apart, thus ring-like Places between the same remained in which the original workpiece diameter was preserved stayed.

The invention is now in the application of the known measures to the manufacture of To see profiles that are attached to block rollers according to the main patent, and them relates to a process for the production of rolls for block rolling mills with increased gripping ability, which are less than 1 mm deep and have outer grooves produced by the hobbing process. The invention consists in that the depressions by means of a gear-like tool be pressed into the roller surface.

It goes without saying that such a thing, without. Utilization of the caliber side parts (Caliber rings) due to the remaining rings, the material was very difficult to spread is advantageous, especially if at the same time, as is the case with the invention proposal, 80 is, the longitudinal flow of the rolling stock in the caliber is promoted rather than hindered. This contrasts the known prior art represents a significant advance. In this way, it is under other possible, the durability of the pass shape, for example the pass side parts of block mill rolls, to increase significantly and thus the roll wear and the roll consumption significantly to diminish. Tests have shown that after rolling 22,0001 steel in Reversing operation, an average of four times per caliber, the caliber shape still no Showed change and the indentations made by the pressure roller in the caliber are still good were received. This is likely to be due to the predominantly rolling effect achieved in the case of the invention proposal Friction (compared to the previous sliding friction). Also through this is a completely noiseless and shock-free rolling process.

In the drawing, according to the proposal of the invention, is in the sense of a rolling process the toothing gauge extending recesses provided rolling caliber in one embodiment illustrated schematically.

With ι the roll caliber base is referred to and 2 are the recesses introduced therein, while with 3. the engagement zones running between the individual band-like around the roller are raised standing, mutually parallel rings are designated.

The claims 2 and 3 are real subclaims and have only in connection with the Main claim meaning.

Claims (3)

PATENT CLAIMS: i. Process for the production of rolls for block rolling mills with increased gripping ability, which are less than 1 mm deep, in the hobbing process have produced transverse grooves, according to patent 963 953, characterized in that that the recesses by means of a gear-like tool pressed into the waizeno surface will. 2. The method according to claim i, characterized in that that the profile is formed next to one another in the roll surface with a narrow tool in several impressions will. 3. The method according to "claim 2, characterized in that the tool between the individual impressions by the width of its shaping part plus about 0.5 is shifted to ι mm in the axial direction of the processed to roller. Considered publications: Swiss patents Nos. 273 474, 564, 235 618, 107 254; French patent specification Mr. 376 586; U.S. Patent No. 2,359,997. 1 sheet of drawings © 509 696/148 2.56 (709 562/68 6.57)