DE2109529A1 - Stretch reducer for profile tubes in particular - Google Patents

Description

Hoesch Aktiengesellschaft, 46 Dortmund, Eberhardstrasse 12 Stretch reducer, especially for profile tubes

The invention relates to a stretch-reducing frame for, in particular, profile tubes with in bearing rings with roller bearings held shafts revolving, complementary to a rolling pass rollers.

Such stretch-reducing frames are used, preferably preheated longitudinally welded round tubes in the stretch-reducing process to round tubes with a smaller diameter and to profile tubes, these are tubes with a round profile different cross-sectional shape to deform. The stretch-reducing stands are to consist of at least two stands Seasons put together in which the final profile is gradual; is achieved wisely. '

It is known to use rollers mounted on shafts for this purpose, j which in the stretch reducing stands preferably on roller bearings j

j stored v / earth. '

· J

! In the event of a change in the rolling program or in the event of wear

ι

j of the rollers must consist of the rollers, their shafts, roller bearings;

changed and usual bearing pieces existing roll sets' ■ be. Here, the named individual parts of a set of rollers are completely removed and other parts are built into the frame of the stretch-reducing stand. This means that a complete, separate set of rolls is required for each rolling program

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is required for each scaffold with the individual parts mentioned. The associated large storage for the individual roller sets, which is all the greater, $ e more different profiles are to be produced, requires high investments. Attempts have therefore already been made not to change all individual parts of a set of rolls when changing the rolling program, but only to change the individual rolls. However, this had the disadvantage that the long set-up times caused by this resulted in correspondingly long downtimes of the entire roller train. On the other hand, there was wear and tear on the matched individual parts of a set of rollers, so that the dimensional accuracy of the pipe profiles was no longer given.

It is known per se, e.g. from DT-AS 1 286 4-90, in Saliber- and profile rollers designed as a hollow cylinder roll jacket to apply to the roll spindles and fix there. When replacing the jacket, the | Bearings, especially in the case of roller bearings, are dismantled, and the division of the roll takes place in particular for the purpose of being able to manufacture the roll shell from a different material.

The invention is based on the object while avoiding the disadvantages of the previously known designs and while ensuring the required dimensional accuracy of the pipe profiles to be produced, a stretch reducing frame with a roller set

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ι to create its individual parts, with the exception of the rollers, ' Can be used again for all different rolling programs without having to be dismantled.

: This object is achieved according to the invention in a stretch reducing frame of the type described at the outset in the manner _; solved that the rollers in a known manner each from a core roller and a roller ring surrounding the core roller

'exist, and that the inner diameter of the roller ring is larger is than the outer diameter of the bearing ring.

This ensures that the core roll, the roller bearings and the bearing pieces remain on one shaft for each rolling program

■ can and only those adapted to the individual rolling programs Roll rings must be changed in such a way that the roll rings are to the side of the

'The set of raised rollers is pushed off and other roller rings are pushed on to the side.

In a further embodiment of the invention, the core roller

one of the axial fixing on the roll rings serving stop, and on the opposite side the stop roll is arranged a j the inner diameter of the roller ring of overlapping Hing>. I.

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The requirement of the company, the set-up times for the rolling program i

Keeping the change as short as possible is another aspect of the invention According to the characteristic, it corresponds in the way that this; Ring is detachably connected to the core roller.

The advantages achieved with the invention are first of all ■ in particular that not as before for each individual ^! Tube profile to be provided with a complete set of rollers _; needs, but that, for all pipes and densel- 'ben roller set, with the exception of auszuwechseMen rolling _ring; can use. This saves considerable investment, storage and maintenance costs. In addition, in particular the set-up times because of the surprisingly simple in constructive ■ tion of Streckreduziergerüstes invention essential \

loaned shortened. Another advantage of the invention is that adjusting the roller sets to one another,; this is particularly true when using the known stretch-reducing scaffolds was expensive, now completely omitted. '

j An embodiment of a stretch reducing stand according to the! Invention is shown in the drawing in a schematic manner

j and is described in more detail below:

! Show it:

1 shows a section of a cross section of the stretch reduction

decorative framework in the plane of the frame division and 20983 9/0198 - 5 -

Pig. 2 shows a section along the line II - II in FIG. 1.

The rollers of the roller set each consist of one

Core roll 1 and a roll ring 2, which e.g.

j parallel keys are connected in a rotationally fixed manner. The storage of the rollers j takes place via bearing rings 3 consisting of conventional roller bearings and bearing pieces in the one that is divided transversely to the direction of passage Scaffolding frame 4. Rings 5 are provided for axially holding the roller ring 2.

! The core rollers 1 are rotatably fixed to the • Shafts 6, 7 or the axes 8, 9 connected, the shaft 7 being driven by the shaft 6. The axial bracing the roller rings 2 takes place between the stop 11 of the core roller 1 and the screw 51 with the core roller attached ring 5 · The axial support of the core rolls is reached via nuts 10 screwed to the shafts 6, 7 or the axes 8, 9.

The exchange of the roller rings 2 takes place in a simple manner in that because of their larger inner diameter compared to the outer diameter of the bearing rings 3 only after loosening of the screws 51 ^ i e roller rings 2 over the bearing rings stripped off and replaced by new roller rings in the reverse order.

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Claims (4)

Hoesch Aktiengesellschaft, 46 Dortmund, Eberhardstrasse-12 Expectations M.) Streckreduziergerüst particular profile tubes on La-gerringen rotating with bearings held waves complementary to a roll caliber rolls, characterized in that the rollers in a bek a nnter manner from each of a core roll (1) and the core roll comprehensive roller ring (2) exist, and that the inner diameter of the roller ring is greater than the outer diameter of the bearing ring (3) « 2. Stretch reducing stand according to claim 1, characterized in that that the core roll (1) has a stop (11). 3 · Stretch reducing framework according to claims 1 and 2, thereby characterized in that on the side of the roller opposite the stop (11) the inner diameter of the roller ring (2) covering ring (5) is arranged. 4. Stretch reducing frame according to claims 1 to 3j thereby characterized in that the ring (5) is detachably connected to the core roll (1). 209839/0198