DE102005042069A1 - Insertion piece for a roll stand for receiving roller pin bearings comprises insertion components made from welded single components - Google Patents

Abstract

Insertion piece comprises insertion components (2.1, 2.2) made from welded single components.

Description

The Invention relates to the chock a rolling stand for receiving roll neck bearings according to the preamble of claim 1.

Chocks of a rolling stand for hot or cold rolling of strips or sheets serve to accommodate the roll neck bearings of a roll and are slidably arranged unlike normal bearing housings. In the horizontal frame is a displacement in the vertical plane and in the vertical frame one corresponding displacement in the horizontal plane via corresponding guides the chocks intended. This displacement makes it possible within certain limits To set the roll gap exactly and the resulting during rolling Wear the Balancing rolls.

The When rolling loads resulting from the chocks can considerable dimensions accept. In addition to static forces and bending moments can also jerky Loads occur, for example, during the piercing of a Slab in a hot rolling mill.

by virtue of These loads become chocks in the areas concerned according thick-walled dimensioned, wherein after the z. B. off DE PS 921 261 known prior art this also because of Partly complex molding made in one piece as a casting become.

These However, one-piece cast chunks have clear signs Disadvantages. For one thing, the manufacturing costs are mostly just in small numbers to produce castings very high and delivery times long. On the other hand, one is in the flexibility in the casting Adaptation of the chocks, z. For example other roll diameter, very limited. Furthermore, with wear of the chocks a Repair not possible or only with considerable cost.

Regarding the Durability is found to be due to the cast structure of the structure in particular is reduced when bending stresses occur or lead to bending and also tensile stresses in the design too disproportionate Dimensioning of the chock. The chock This makes it more expensive and affects the increased size negatively the dimensioning of the roll stand.

Of the Invention is based on the object, a chock of a rolling stand for receiving roll neck bearings in which a roller for warming or cold rolling of a metal strip or sheet, which the aforementioned disadvantages of the prior art known in one piece executed chocks avoids.

These Task is based on the generic term in conjunction with the characterizing Characteristics of claim 1 solved. Advantageous developments are the subject of dependent claims.

To the teaching of the invention, a chock is used to solve this problem, that welded out Individual components consists, which in an advantageous development standardized and modular.

The Individual components of the chock are inventively z. B. from a comparatively cheap rolled heavy plate compared to the casting produced.

The from heavy plate in different dimensions z. B. by flame cutting manufactured individual components are then for welding through mechanical processing prepared.

For welding the Individual components, it is because of the sometimes very large to be welded cross-sections proved to be advantageous to apply the electron beam welding. However, other joining methods are also conceivable, such as B. laser welding or flash butt welding, with those big ones Cross sections added can be.

In an advantageous embodiment of the invention, to facilitate the assembly of Chock the individual components first welded into individual modules and then welded together after appropriate mechanical processing of the finished chock.

Of the The advantage of this redesign of the chocks is that the One through the standardization of the individual components and the modular Building a flexible, cost-effective to be adapted to different geometric requirements allows will, resulting in a cost-effective Extension of the rollable product range leads.

on the other hand become relative by using compared to the casting inexpensive rolled heavy plate and through stress-optimized constructive design the manufacturing cost of the chock significantly lowered and in particular in bending and / or tensile loads due to the favorable Roll structure extended the durability.

simultaneously can by the optimized design interpretation the weight of the chock reduced and the overall height a rolling stand be optimized. Ultimately leads this leads to an increased stability of the roll stand.

by virtue of the different loads in the different areas of the chock while the use of it is in the constructive redesign of the invention now also possible, for higher loaded Areas of the chock Material with higher Strength and / or toughness to improve durability.

One Another advantage is that the necessary wear-related Cost-effective repairs, for example by replacing individual components, can be performed.

following The invention will be explained in more detail with reference to two figures. Same reference numerals in different figures designate the same components. Show it:

1 according to the invention from single components or individual assemblies welded chock,

2a welded to the individual module center part of the chock,

2 B Bending arm of the chock welded to the individual subassembly.

1 shows in various views a welded piece of individual components or individual assemblies according to the invention produced chock. The chock consists of welded individual components 1.1 . 1.2 . 1.3 a middle section 1 , made of removable lugs 2.1 . 2.2 ( 2a ) as well as from the welded individual components 3.1 . 3.2 . 3.3 a bending arm 3 ( 2 B ).

For the production of the chock, all of the individual components produced from rolled plate are first of all 1.1 . 1.2 . 1.3 . 2.1 . 2.2 . 3.1 . 3.2 . 3.3 of the chock mechanically preprocessed and thereby provided with an allowance for the subsequent welding.

After cleaning the individual components, these are first demagnetized for the electron beam welding provided in the present case. After that, the individual components 1.1 . 1.2 to the single module 1 ( 2a ) and the individual components 3.1 . 3.2 . 3.3 to the single module 3 ( 2 B ) and stapled, for example, by tungsten inert gas welding (TIG welding). Subsequently, they become the individual modules 1 and 3 pre-assembled individual components inventively welded by electron beam. In the 1 . 2a and b, these welds are marked "SN".

The For this Electron beam welding used may be due to other applications other welding, constructive or economic aspects also by others Welding process, such as B. laser welding or flash butt welding, be replaced.

The individual modules produced in this way 1 and 3 are cleaned again after a further mechanical pre-processing, demagnetized and together with the removable lugs 2.1 and 2.2 pre-assembled by a tack weld to the complete chock.

After the final welding of the chock by means of electron beam ( 1 ) the chock is annealed as required, sandblasted and finished for use.

LIST OF REFERENCE NUMBERS

Claims (7)

Chock of a roll stand for receiving roll neck bearings, in which a roll for hot or cold rolling of a metal strip or sheet is mounted, characterized in that the chock of welded individual components ( 1.1 . 1.2 . 1.3 . 2.1 . 2.2 . 3.1 . 3.2 . 3.3 ) consists. Chock according to claim 1, characterized in that the individual components ( 1.1 . 1.2 . 1.3 . 2.1 . 2.2 . 3.1 . 3.2 . 3.3 ) consist of rolled material. chock according to claim 1 and 2, characterized in that the rolling material Heavy plate is. Chock according to one of claims 1-3, characterized in that the individual components ( 1.1 . 1.2 . 1.3 . 2.1 . 2.2 . 3.1 . 3.2 . 3.3 ) of the chock are welded by electron beam. Chock according to one of claims 1-3, characterized in that the individual components ( 1.1 . 1.2 . 1.3 . 2.1 . 2.2 . 3.1 . 3.2 . 3.3 ) of the chock are welded by laser beam. Chock according to one of claims 1-5, characterized in that the individual components ( 1.1 . 1.2 . 1.3 . 2.1 . 2.2 . 3.1 . 3.2 . 3.3 ) standardized and modular. Chock according to one of claims 1-6, characterized in that the individual components ( 1.1 . 1.2 . 1.3 ) to the individual module ( 1 ) and the individual components ( 3.1 . 3.2 . 3.3 ) to the individual module ( 3 ) are welded.