CS199554B2 - Sizing roll - Google Patents

Abstract

Wire rolling mill comprises two high roll units displaced at 90 degrees relative to each other with hard metal or similar ring shape rolls, which are supported on one end only, the rings being clamped accurately onto their drive shafts against locating stops. The rings have a number of round (bastard round)-oval grooves. On maintaining a minimum rolling ring width for large grooves, >=1 of the adjacent round (bastard round) and one oval groove provided for a fixed deformation sequence on each ring, while for smaller grooves >=2 each of directly adjoining round (bastard round) and oval grooves and/or two adjacent round (bastard round) and oval grooves separated by an intermediate oval groove are provided on each ring. Moreover a fixed deformation sequence is adhered to on the rings and each roll unit is fitted with a compensating spacer, which assures a constant distance between the roll groove centre lines and the plane against which the rings are mounted. The system permits the use of rings with excess number of grooves, which are taken into use as grooves are worn out. It thereby permits maximum utilization of the expensive hard metal rings.

Description

(54) Calibration cylinder

BACKGROUND OF THE INVENTION The present invention relates to a calibrating roll for a continuous wire rolling mill in a plurality of offset duo rolling units with circular and oval calibers mounted on flanges of carbide or the like. Finished wire blocks are designed in modern wire rolling mills - like, a rolling mill consisting of - several, most often 90 ° offset, rolling units. In contrast to the conventional conventional blocks and ready-to-use rolling mills, the considerably smaller diameters of the rolling flanges and rolls as well as the very high cash rolling speeds impose very high abrasion resistance requirements. The use of carbide rolls has proven quite advantageous. The rolling flanges are clamped on the roll shafts of the rolling stands against the stop. The torque transmission between the roller and the rolling mill shaft is solved in the new rolling mill only by frictional engagement in order to eliminate the stress peaks associated with the risk of breakage. when using cross wedges or similar transmission elements. Calibration cylinders are regularly provided with two. gauges of the same size, which are aligned with a certain distance from the face. However, only one bearing caliper works at a time. After wear of the first caliber. the calibration cylinder is rotated and the second caliber is used. The width of calibers, cylinders - is largely determined by the size of the calibers and the transmitted torques. The calibrating rolls of the same rolling mill sizes of a single rolling machine are made with the same width due to the clamping and unifying technique. However, this has the consequence that the width of the rolling rings - the individual rolling stands being used by the corresponding - gauges is very different. While in the largest calibers of one machine it is necessary to work with a calibrating cylinder with one calibrator under certain circumstances, if the second larger cylinder unit with larger cylinder dimensions is not to be included in the mill, there are two calibers with two calibers - calibers used width of calibration - cylinders only - insufficiently. However, this leads to a considerable increase in the cost of the equipment and, ultimately, to the price of the finished product.

The purpose of the invention is therefore to make better use of the minimum required width of the calibration rolls.

The essence of a calibration cylinder for. - wire rolling mill with 90 ° offset rolling units bottom and output199554

The four-dimensional circular and oval caliber provided with a flange for clamping the calibers on the driven shaft against the stop according to the invention consists in that in the case of deformation in the vicinity of the circular caliber and the oval caliber. for small calibers, two directly adjacent ring gauges and oval gauges, and for middle gauges, two round gauges of different size between which an oval gauge is located, and the constant position of each calibration cylinder is adjustable by a stop to balance the distance of the gauge center from the flange.

An advantage of the invention is the optimal use of the minimum required width of the calibration rolls for all calibration rolls of the rolling unit. The corresponding different caliber sizes and their geometrical forms allow for multiple variations of the use of calibrating rollers for material deformation. When the calibers wear, they can be interchanged not only in the calibration cylinder, but also between the rolling units. .

It is taken into account that, in a given arrangement of the gears and drives of the rolling machine, only a certain cross-sectional shape, oval or circular, and only a certain extent can be deformed. rolled sections.

An exemplary embodiment of the invention is further illustrated in the accompanying drawing, wherein FIG. 1 is a calibration cylinder with a circular and adjacent oval gauge, FIG. 2 is a calibration cylinder with two adjacent smaller circular gauges and on both sides of this pair of gauges one oval gauge. one of which is in the rolling axis,. Fig. 3 is a calibration cylinder according to Fig. 2 with a circular caliber in the rolling axis; and Fig. 4 is a calibration cylinder with two circular calibers of different sizes separated by an inserted oval caliber.

The calibrating rollers shown schematically in the drawing belong to a single rolling stand and are made in the same width with respect to the clamping of the rolling flanges and to their transmitted torques as well as their unification.

Giant. 1 shows a calibration flange 1 with one oval gauge 2 a. an adjacent circular caliber. the largest circular caliber 3 and the largest oval caliber 2 may belong to one particular deformation order. The calibration flange 1 is clamped in a manner known per se to the stop 4 of a single rolling stand. Since both the oval gauge 2 and the circular gauge 3 are used on a certain rolling table, the distance between the center of the gauge and the edge of the rolling flange 1 may be different. This different distance of the center of the gauge 2, 3 from the edge of the rolling flange 1 is compensated for the individual rolling mill by a stop 4 or other rolling mill elements. After alignment, the centers of gauges 2, 3 align with a certain rolling axis. After wear of gauges 2, 3, the rolling flange 1 of the two adjacent rolling stands is reversed.

2 and 3, a calibration cylinder is shown having two adjacent circular gauges 6 and surrounding two oval gauges 7 of the same size. These can be, for example, the two smallest gauges 6, 7 of a single deformation sequence. In this case, FIG. 2 shows the oval gauge 7 in the rolling axis and the circular gauge 6 in FIG. 3. the edges of the rolling flange 5 are aligned by the stops 8 and 9 or by other rolling mill elements. After wear of the circular gauge 6, pepper, oval gauge 7 on the bearing side, the rolling flange 5 of each mill stand is first rotated and after wear of the circular gauge 8 and the oval gauge 7 of both rolling stands the flanges 5 are interchanged.

In Fig. 4, a calibration cylinder 10 is shown with two circular calibers 11 and 12 of different size each, with an oval caliber 7 interposed therein. This calibration cylinder 10 is also used in two different rolling stands, one of which uses a larger In the second smaller caliber 11, 12. After the caliber 11, 12 is worn, the calibrating cylinder 10 can first be rotated in the same mill and then exchanged between the two mill stands.

The advantage of the present invention lies in the optimum utilization of the minimum required width of the calibrating roll in a particular rolling mill and the resulting reduction in machine costs.

Claims (1)

I will invent the subject Calibration roller for wire mill with 90 ° offset duo rolling units and replaceable circular and oval calibers, fitted with a flange for clamping calibers to. A driven shaft against the stop, characterized in that, in the case of deformation in the vicinity of the circular gauge (3) and the oval gauge (2), in the case of large calibers, one directly adjacent circular gauge (6) and an oval gauge · (7) is provided. small calibers · two directly adjacent ring gauges · (6) and oval gauges (7), and in the middle gauges always two circular gauges (11, 12) of different size. between which there is an oval gauge (7) and the constant position of each calibration cylinder is adjustable by the stop · (4, 8), compensating the distance between the center of the gauge and the flange.