DE3114851A1 - "WORK OR RETURN ROLLER" - Google Patents

Description

31U851

The invention relates to a work or return roller with exchangeable ring gauges for a plug stand for hot rolling of pipes according to the generic term of claim 1, as well as a device for tensioning the ring caliber.

One-piece rollers with four or six caliber incisions are known. The rollers should, even if only one or two caliber notches were worn, all of which had to be turned off to make a new one Calibration could be incised. When reaching a minimum (scrap size), the entire The roller including the journal must be scrapped.

Multi-part rollers are known which are wedged on a shaft with the aid of mechanical holding devices (DE-OS 28 11 085).

It is also known to fasten rolling disks on shaft journals of wire rolling stands that are mounted horizontally and to fix them with radially applied plastic pressure masses.

Finally, the shrinking of ring calibers onto the roller axle is also known.

The object of the invention is to provide a multi-part Arbeitsbzw. Return roll for a plug stand for hot rolling of tubes to create a simple interchangeability of the claimed caliber rollers and a Allows optimization of the overall calibration for certain rolling programs.

31U851

To solve this problem, a multi-part work and return roller is proposed according to the invention, and a device for tensioning the ring caliber as described in the claims.

The advantages of the work and return roller according to the invention lies in the individual production and post-processing. This results in a higher degree of utilization of the individual calibers and thus of the entire roll.

The roller axle remains and does not need to be scrapped when the individual rollers wear out.

The device according to the invention for tensioning the ring caliber facilitates replacement or assembly the roller considerably.

In the accompanying drawings, a work or return roller and the tensioning device are schematically shown in longitudinal section.

Show it:

Fig. 1 e nß work roll

Fig. 2 shows a return roller.

From both drawings it can be seen that the ring caliber 1 are pushed onto a roller axle 2 and over a pressure transmission sleeve 3 with both a pressure nut 4 and a hydraulic clamping device, consisting of a pressure ring 5 'and a hydraulic nut 7, related. The hydraulic nut 7 is also

31H851

like the clamping nut 4 screwed onto the roll neck 6 of the roll axis 2. The pressure ring 5 is with Inner and outer cuffs 8 are provided. The bracing takes place against a splash (collar) 9 on the roller axis.

The multi-part work and return roller according to the invention is assembled or disassembled as described below.

A) assembly

a) Threading the individual ring calibres or rollers 1 according to the rolling program onto the roller axis 2.

b) Pushing the clamping or bearing sleeve 3 onto the roller axle 2 against the caliber rollers 1.

c) Screw the clamping nut 4 onto the roller axle 2 and tighten the clamping sleeve by hand 3 and the caliber rollers 1 against the collar 9 of the roller axle 2.

d) Screw the hydraulic clamping nut 5 onto the roller axle 2 and tighten it by hand against the clamping sleeve 3.

e) Connecting the hydraulic pump to the hydraulic clamping nut 5.

f) Applying the required clamping pressure to the hydraulic clamping nut.

g) The hydraulic pressure in the clamping nut acts against the clamping sleeve and caliber rollers The collar of the roller axle elongates the roller axle and thus creates the required surface pressure between the clamping sleeve, the caliber rollers and the collar of the roller axle for the transmission of the torque generated during the rolling.

31U851

B) dismantling

a) Screw the hydraulic clamping nut 5 on the roller axis 2 against the clamping sleeve j5.

b) Connecting the hydraulic pump to the hydraulic clamping nut 5.

c) Applying the required clamping pressure to the hydraulic clamping nut.

d) Loosen the clamping nut 4 by hand.

e) Slacken the hydraulic clamping nut 5.

f) Unscrewing the hydraulic clamping nut from the Roller axis 2.

g) Unscrewing the clamping nut 4 from the roll axis h) Pushing off the clamping sleeve 3 and the caliber rolls 1 from the roller axis 2.

The same operations also apply to the return rollers.

After tensioning the ring caliber, the hydraulic tensioning nut is removed again.

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Claims (2)

Meissner & Meissner 311A 8 51 PATENT AGENCY OFFICE PATENT LAWYERS
DIPL-ING. W. MEISSNER (1980) DIPL-ING. PE MEISSNER DIPL-ING. H.-J. PRESTING Approved representatives before European Patent Office -Professional Representatives before the European Patent Office Your reference Your letter from Our reference HERBERTSTR. 22, 1000 BERLIN 33 M / Go.21 327 April 9, 1981 Mannesmann AG
Mannesmannufer 2
Düsseldorf 1 Work or return roller Patent claims: Work or return roller with exchangeable ring calibers arranged on a roller axis for a Stopper stand for hot rolling of pipes, characterized in that the ring caliber (l) by a Clamping nut (4) on both sides via a ring caliber (1) arranged between this and the adjacent ring caliber Pressure transmission sleeve (3) having pressure flanges against a pressure transmission sleeve arranged on the roller axis Flange (9) are frictionally clamped. TELEX: TELEGRAM: PHONE: BANK ACCOUNT: CHECK ACCOUNT: 1-85644 INVENTION BERLIN BERLINERBANKAQ. P. MEISSNER BLN-W Inven d BERLIN 030/8916037 BERLIN 31 404737-103 31U851 2. Device for tensioning the ring caliber of a work T or return roller according to claim 1, characterized by a hydraulic tensioning device (5, 7) that can be screwed onto the roller axle (2), which has a pressure ring (5) which can be pressed against the flange adjacent to the clamping nut (4).