DD281705A7 - DEVICE FOR ROLLING ROLLERS IN THE ROLLING ROLL IN THE CALIBEROUS ROLLING OF RECTANGULAR CROSS SECTIONS - Google Patents

Abstract

The invention relates to a device for lateral guiding of rolling stock with a rectangular cross-section in the nip, which is applicable to caliber-free rolling in front or middle scales of rod and wire rolling mills. According to the invention, the guide arranged in the area of the work rolls up to the center of the roll has a guide insert. This Fuehrungsbeilage has provided with a recess Fuehrungsflaechen. The initial length b corresponds to the pressed length of the incoming rolling stock, the recessed width a runs parallel to the upper or lower boundary of the guide surface, the recessed depth c has a tolerance of less than 1 mm to the wide rolling stock and the guide insert also has a vertical and parallel to the rolling center at a distance d running separation of the Fuehrungsflaeche. The distance d corresponds to the bulging amount caused by bulging. The rolling stock with a rectangular cross-section is guided so that the side surfaces of the rolling stock cross-section entering the roll gap can be held at right angles and without play to the roll axis in the roll gap. The Fuehrungsvorgang takes place until the rolling stock has undergone the desired Hoehenabnahme. The guide according to the invention in caliber-free rolling of rectangular cross-sections ensures that the diagonal offset is restricted, as a result of which improved dimensional and dimensional stability of the rolling stock is achieved. Nip; rolling; Wire rod mills; Guide; recess; propagation; Diagonal offset; Cross-section; Fuehrungsbeilage}

Description

Field of application of the invention

The invention relates to a device for lateral guiding of rolling stock of rectangular cross-section in the nip, which is applicable to caliber-free rolling in front or middle scales of rod and wire rolling mills.

Characteristic of the known state of the art

It is known that caliberless rolling stock in uncalibrated rolls before and then finish rolling between caliber rolls to the final shape of the rolled product.

The caliber-free rolling brings decisive advantages such. B. less roll change when changing the. Rolling program and thus higher utilization of the rolling mill, easier post-processing dsr rolls or longer life of the rolls compared to rolling in calibers. On the other hand, in the case of non-caliber rolling, there are above all disadvantages due to deformation of the rolling stock cross-section to a parallelogram. The reason for this lies in the non-limited side walls of the rolling stock cross-section. Thus, unwanted diagonal offset phenomena are the result and negaitv affect the quality of the final product.

It is also known that in pre- and middle graduations of rod and wire rolling mills guides that extend in the work rolls to the center of the roll, are arranged.

According to DE-OS 3224022 method and apparatus for rolling rods and wires by means of burnishing are known. For this purpose, a device for guiding the sides of metal bars during rolling is proposed. This guide is provided with grooved guide surfaces in the nip, wherein between the grooved guide thumb and the rolling material a clearance of 1 to 5mm is granted. In this solution, it is attempted to adjust the entire guide course linienmäßig.an the Breitungsverlauf the forming process, resulting in a complicated manufacture of the guide elements. With the guide according to DE-OS 3224022 can still undesirable diagonal offset occur to a considerable extent, since this guide is designed so that it ensures only a support of the rolling stock when passing through the nip.

Object of the invention

The aim of the invention is a device that before in caliber-free rolling. Walnut with rectangular cross-section contributes to the fact that a high dimensional stability of the final product is guaranteed and rolling defects such as cracks and Überwalzungen be largely limited due to a large diagonal offset.

Explanation of the essence of the invention

The invention is based on the technical object to limit the Diagoralversatz as an expression of the deformation of Walzgutquerschnittes to a parallelogram in the caliber-free Waken of rolling stock with rectangular cross-section.

According to the invention the object is achieved in that the guide arranged in the region of the work rolls to the middle of the roll has a guide insert. This guide supplement has provided with a recess guide surfaces.

The output length b corresponds to the pressed length of the incoming rolling stock, the recessed width a runs parallel to the upper or lower boundary of the guide surface, the recessed depth c has a tolerance of less than 1 mm to the wide rolling stock and the guide insert also has a vertical and parallel to the rolling center at a distance d extending separation from the guide surface. The distance d corresponds to the bulging amount caused by bulging.

The rolling stock with a rectangular cross-section is guided so that the side surfaces of the incoming rolling into the roll nip can be held at right angles and backlash to the roll axis in the nip. The guiding process succeeds until the rolling stock has undergone the desired height reduction.

The erfindungsge.Tiäße guide supplement when caliber-free rolling of rectangular cross-sections ensures that the diagonal offset is limited, whereby an improved dimensional and dimensional stability of the rolling stock is achieved.

embodiment The invention will be explained in more detail in the following embodiment. In Fig. 1 to 1 c, the cross section of the guide is shown in different sectional planes. The guide 2 is in Fittings box in the field of work. ¹ rolls hefestigt. 1 The guide 2 according to the invention has a guide supplement 4 with

recessed guide surfaces for receiving the Walzgutquerschnittes 3. Here, the guide surfaces have a

Starting length b, which corresponds to the pressed length of the incoming rolling, a recessed width a, which is smaller than that Rolling gap is and a recessed »depth c, which has a tolerance of less than 1 mm to the wide rolling stock, on. Besides, has

the guide supplement 4 a perpendicular and parallel to the rolling center running separation whose distance to the

Corresponds to the bulge. The entering into the nip rectangular rolling stock, for. B. 80 χ 64 mm, is supported by known, arranged in pairs

a game of 0.4 to 0.8 mm led. In the nip, the rolling stock is detected laterally by the guide surfaces of the guide insert 4 and kept free of play, as it is not by bulging, z. B. d = 26mm, spreads. The distance between the two

Guide inserts (see Fig. 1 b) 4 is equal to the incoming Walzgutbreite b ". The recess has the dimensions a = 50 mm, b = 55 mm and c = 9 mm. It allows a free width of the rolling stock

in the middle part of the Führungsbeiiage, where a kleinor than the incoming height of the rolling stock must be. The rolling stock leaves

Use of Führungsbeilago 4, the Walken in expiring dimensions of z. B. 66 χ 49mm without additional occurring Diagonal offset.

Claims (1)

Apparatus for guiding rolling stock in the roll gap during caliber-free rolling of rectangular cross-sections, in particular of steels and non-ferrous metals on continuous rod and wire rolling mills, by means of a guide which is arranged in the area of the work rolls to the center of the roll, characterized in that the guide ( 2) has a guide shim (4) whose guide surfaces a recess having an initial length (b) corresponding to the pressed length of the incoming rolling, a recessed width (a), which runs parallel to the upper or lower boundary of the guide surfaces and a recessed depth (c) which has a tolerance of less than 1 mm to the wide rolling stock, and that the guide shim (4) has a perpendicular and parallel to the rolling center at a distance (d) extending separation. For this 1 page drawings