DE1777433A1 - VERY SMOOTH UNIVERSAL OR PIPE REDUCING MILL - Google Patents

Description

MANNESMANN-MEER Aktiengesellschaft, Mönchengladbach

- "Multi-stand universal or tube reducing mill"

The invention relates to a universal or tube reducing mill with several roller heads offset one behind the other, of which two roller heads are housed in a common stand column that is open in a U-shape on one side, in which the output shafts of a bevel and spur gear drive containing stand drive in pairs are coupled to the roller shafts are staggered fixed.

The invention is based on a tube reducing mill according to DT-PS 832 587, which shows a tube reducing mill in which the individual roller heads have a relatively large distance from one another.

Furthermore, a rolling mill is known from DT-PS 744 922, in which the acute-angled Bevel drives and the right-angled bevel drives are all the same, the vertical ones The shafts in the stands are the same in pairs and the output shafts from the Uprights are the same in pairs. However, this is the use of four-roll heads, in which adjacent roll heads arranged offset to one another have no rolls arranged parallel to one another. In the Use of three roller heads according to the genre of the invention are respectively two opposite rollers of two different roller heads axially parallel arranged to each other, so that two roller heads each have three roller heads

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Have pairs of shafts which are arranged parallel to one another at a distance between the two rollers. In the known designs, the spacing of the respective parallel roller shafts from one another is essentially also determined by the dimensions of the tapered or conical shafts driving these roller shafts. Spur gear drives determined. This is not the case with four-roll stands according to DT-PS 744 922 and with three-roll stands according to DT-PS 832 587 likewise irrelevant, because here there is a very large distance between the roll heads. "

The object of the invention is, in a tube reducing mill with three-roll heads to largely eliminate the influence of the overall width of the spur and bevel gear drives of the scaffold drive on the distance between the roller heads.

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According to the invention it is therefore proposed that the distance between adjacent spur and bevel gear drives to the opposing rollers of the two roller heads driven by them is different by about the width of the spur or> bevel gear drive. This results in a staggered arrangement of the spur and bevel gears of the scaffold drive in spite of roller shafts that are parallel to one another in pairs and ensures that the roller heads can be arranged at the smallest possible distance from one another.

The embodiment according to the invention is shown in the attached Figures 1 and 2 for example reproduced, namely shows

Fig. 1 is a view of a tube reducing mill transverse to the rolling direction \

FIG. 2 shows a plan view of a tube reducing mill according to FIG. 1. c

A drive motor 1 drives a longitudinal shaft 2, which each have a bevel gear the input loop 3 of the roller gear for each roller head stores. In gear housings 4 can in a manner known per se a summation gear and the downstream Spur gear to achieve the basic speed series and the rigid and mechanical feed of the relatively large uncontrolled component via gears the rolling capacity can be accommodated. The relatively small portion of the

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Rolling power is introduced via a power take-off 6 for each summation gear through a continuously variable transmission 5, the load-dependent slip of which is reduced in the ratio of the unregulated to the regulated rolling power and thus practically eliminated. The adjustable gears 5 each consist of an oil pressure pump, which is driven by the main shaft 2 via the input shaft of the associated roller gear unit, and an oil motor driven by this pump, which drives the auxiliary drive of the summation gear via cardan shafts 6. In this way, the individual roller heads can be regulated jointly and / or individually by means of corresponding known controls. Drive shafts 7 are coupled to the input drive shafts 19 of the rolling mill via cardan shafts 8. In a special design, the gears 4 each have two output shafts 7, 7 ¹ , from which two rows of basic speeds can be taken alternately. On a foundation 9 are double stand 10, in which the one behind the other roll heads - encompassed on three sides - are clamped by a clamping device.

The rollers built in hexagonal three roller heads are installed alternately one behind the other, once with the roller 13 ₅ lying vertically downwards, once with the roller lying vertically upwards, in order to obtain the roll gap offset. This results in two rows of parallel output shaft pairs 12, 12 ¹ , 12 "and 14, 14 ', 14" offset from roller head to roller head for rollers 13, 13 ", 13" and are elastically coupled via the coupling 20, 20 ', 20 "to the shafts carrying the rollers 13, 13', 13 * in the roller head. Corresponding to the output shaft pairs 12, 12 ', 12''and 14, 14', 14 '', two rows of bevel gear drives 15 ', 1S''and16', 16 "are arranged analogously, which via the bevel gear drives 17 ', 17'' and 18 '18 "are driven by the drive shafts 19 by means of the cardan shafts 21", 21 "and 22', 22". The horizontal output shafts 12 and 14 are driven analogously via the spur gear sets 17 and 18, respectively.

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Claims (1)

Case 4897 PATENT CLAIM Universal or Rohrreduzierwalzwerk with several staggered three roller heads one behind the other, of which two roller heads are housed in a common stand that is U-shaped on one side. * The scaffolding drive containing spur gear drives are fixedly mounted offset in pairs, ^f characterized,- ■ ■■. ■ ■ ■■ * that the distance between adjacent spur and bevel gear drives to the opposing rollers of the two roller heads driven by them is different by about * ^ the overall width of the spur or bevel gear drive. \ \ * ■ · ■ DipL-fo 4 09886/0531 BATH ORIGINAL Blank page