SU1292851A1 - Mill for cold rolling of welded strip - Google Patents

Abstract

The invention relates to rolling production and can be used in workshops where cold rolling of strips with welded seams is carried out. The purpose of the invention is to increase the rolling resistance of welds by reducing the tension along the edges of the strip in the weld zone. The equipment of the mill with tapered roller cassettes that deform the edges of the strip, makes it possible to reduce the tension of the edges in the weld zone. The waviness of the strip decreases from the edges to the middle of the strip, occupies a narrow area in the weld zone and does not affect the quality of the strip, but it allows to increase the weldability of the weld. Rollers in cassettes are arranged in two rows in a checkerboard pattern. The cassettes are arranged to move parallel to the axis of the rolls. 1 hp ff, 3 ill. (L to up to 00 JV

Description

one

12

The invention relates to rolling production and can be used in workshops where cold rolling of strips with welded seams is carried out.

The aim of the invention is to increase the rolling resistance of welds by reducing the tension along the edges of the strip in the weld zone.

Figure 1 shows the cold rolling mill, a general view; FIG. 2 shows a unit of plastic deformation of the strip edges; on fig.Z - section aa in figure 2.

The cold rolling mill includes a rolling stand 1 (Fig. 1) with horizontal work rolls 2 and a weld detection unit consisting of a sensor 3 and an electronic block 4 The mill is equipped with a plastic deformation unit for strip edges located in front of the mill stand and associated with the device weld detection. The plastic deformation unit of the strip edges contains opposedly located on both sides of the roll of the cassette 5 and 6 (Figures 1 and 2), each of which includes two rows of tapered rollers 7 (Figures 1-3) placed one above the other in a checkerboard pattern. . The rollers are mounted in cantilevers on the supports 8. The cassettes 5 and 6 are movable along the roll 2 along the guides 9 AND move along the roll 2 along the guides 9. The block 11 serves to control the hydraulic cylinders 10. The strip is indicated by the position 12, the weld is marked by the position 13 .

Cold rolling mill works as follows.

The strip 12 is pierced in a rolling cage 1, crimping it with work rolls 2. In this case, the strip 12 is moving

in the direction shown by the arrow in FIG. A weld seam 13 connecting the individual strips into one passes through the sensor 3 for detecting the weld. The sensor 3 generates a signal that is converted by the electronic unit 4, transmitting the signal to the hydraulic cylinder control unit 10. The unit 11 switches on the pressure in the hydraulic system, and the hydraulic cylinders 10 move the cartridges 5 and 6 in the direction along the roll 2 towards each other (the direction is shown by arrows in FIG. ). Cassettes 5 and 6 move the tapered rollers 7 along guides 9 Installed in: assemblies are tapered

The rollers 7 are placed with the direction

1292851

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0

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taper to each other, installed in each cassette in two rows over the other in a checkerboard pattern. When moving the cassettes 5 and 6 with the rollers 7 towards each other, the edges of the strip 12 fall between the tapered rollers, plastically deformed by the rollers due to compression and bending in them. The direction of the taper of the rollers towards each other provides a smooth reduction of plastic deformation and, therefore, waviness from the edges of the strip to the middle. The time delay unit 11 includes hydraulic cylinders 10, which move the cassettes 5 and 6 along the guides 9, remove them from each other and lead the rollers 7 away from the edges of the strip 12. Thus, before the seam 13 they create waviness along the edges. After waiting for the seam 13 between the diluted rollers 7, the block 11 re-through the hydraulic cylinders 10 moves the rollers and thereby the waviness of the edges of the strip after the seam is formed again. The result is a wavy edge before and after the seam.

The proposed technical solution

allows to reduce the tension of the edges of the strip during rolling in the weld zone and thereby increase the rolling properties of the welds in the cold rolling mill. A plastic deformation unit, obb, cures the formation of waviness of the edges of the strip before and after the seam, and the waviness is created in a small, edge section and decreases from the edge to the middle of the strip,

thus, it does not affect the quality of the strip, but it improves the weldability of the welds. This, in turn, increases the productivity of the cold rolling mill, reduces

metal waste generated at the breaks of welds and prevents damage and failure of the mill rolls.

The opposed arrangement of the tapered rollers provides the equation of forces from the hydraulic cylinders 10 in the direction along the roll. This, in turn, provides the same plastic deformation of the edges with each

the sides of the strip, the same reduction in tension along the edges and reduces the likelihood of seam breakage. In addition, an additional effect is achieved - centering the strip along

3

mill axis. Making the rollers taper helps to reduce the plastic deformation of the edges from the edge of the strip to the middle and thereby smoothly redistribute the tension of kpoMOK, which becomes almost zero along the edge of the edge and gradually increases to the nominal value. Moreover, the taper of the rollers facilitates the sliding of the rollers on the metal and facilitates the design of the unit of plastic deformation. The mechanism for moving the rollers along the roll creates a predetermined pressure that ensures a given plastic deformation of the edges of the strip before and after the seam.

Thus, the proposed device has a simple structure and provides an increase in the rolledness of the welds.

In comparison with the known ones, the proposed technical solution provides an increase in the rolling properties of the welds by reducing the tension along the edges of the strip in the weld zone.

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Claims (2)

1. Cold rolling mill for welded strip including rolling stands with horizontal rollers and a weld detection unit, characterized in that, in order to improve the rolling properties of the welds by reducing tension along the strip edges in the weld zone, the mill is equipped with a duct plastic deformation unit located in front of the mill stands and associated with the device weld detection. 2. Stan according to Clause 1, which differs from the fact that the knot of plastic deformation of the strip edges is made in the form of two cassettes of cantilever tapered rollers, which are installed in a checkerboard pattern in two rows, above the other. with the direction of taper of the rollers of one cassette towards the rollers of the other, and both cassettes with rollers are equipped with a mechanism for moving them parallel to the axis of the rolls. Y7 3 .7 Editor T. Parfenova Compiled by G.Rostov Tehred I.Popovich Proofreader 0. Lugova Order 31.2 / 9 Circulation 481 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 F1 / &