RU2176937C2 - Rolling stand with rolls shifted in axial direction - Google Patents

Abstract

FIELD: rolled stock production, namely apparatuses for axially moving working rolls, possibly in four- and six-high rolling stands of cold rolling mills. SUBSTANCE: rolling stand includes frame, working and backup rolls with chocks, upper and lower guiding units mounted at inner side of stand struts with possibility of vertical motion and joined with lateral side of chocks of working rolls by means of spline joint. Hydraulic cylinders for counter-bending of working rolls and for balancing upper working roll are mounted in guiding unit. Each guiding unit includes grooves open to side of chocks and to side of roll change and arranged symmetrically relative to spline joint. =-shaped slides are placed in said grooves in such a way that they are flush-mounted relative to surface of guiding units. Flanges of slides have turnings for rigidly mounting housings of hydraulic cylinders for axially moving rolling rolls. Rods of said cylinders are connected with guiding unit. Slides have mechanisms for fixing them relative to chocks of rolling rolls. EFFECT: increased service life period of roll chocks, simplified maintenance. 3 dwg

Description

 The invention relates to the field of rolling production, and in particular to devices for axially moving work rolls, and can be used in 4- and 6-roll working stands of cold rolling mills.

 Known rolling mill with axially movable work beams [1], containing a bed, work and backup rolls with pillows mounted with the possibility of vertical movement in the window of the bed, anti-bending hydraulic cylinders of the work rolls and balancing the upper work roll, interacting with the pillows of the work rolls, and also a device for axial movement of the rolls in the form of a hydraulic cylinder mounted on a bed, the rod of which has a detachable connection with the cushion of the work roll.

 The disadvantage of this device is that the balancing and anti-bending cylinders move together with the work rolls during their axial movement.

 Known rolling mill with axially movable work rolls [2], adopted as a prototype, containing a bed, work and backup rolls with pillows, upper and lower guide blocks with anti-bending hydraulic cylinders of work rolls and balancing the upper work roll mounted on the inside of the racks beds with the possibility of vertical movement and connected with the side of the pillows of the work rolls by means of a spline connection, as well as hydraulic cylinders of axial movement of the work rolls ontirovannye on the frame, and locking mechanisms of the rods with respect to the work rolls pillows.

 The disadvantage of this design is the off-center application of axial forces by the hydraulic cylinders of the axial movement of the work rolls when the diameter of the latter changes, since the hydraulic cylinders are rigidly mounted on the bed.

 In addition, the design has large dimensions and creates difficulties when handling rolls.

 The problem solved by the invention is to provide a central application of axial forces for any diameter of the work rolls by ensuring the joint vertical movement of the pillows of the work rolls and axial movement cylinders.

 This problem is solved as follows.

 In a known rolling stand comprising a bed, work and backup rolls with pillows, upper and lower guide blocks with anti-bending hydraulic cylinders of work rolls and balancing the upper work roll, mounted vertically on the inside of the bed racks and connected to the side of the work roll cushions by spline connections, as well as hydraulic cylinders for axial movement of the work rolls and their fixation mechanisms relative to the cushion of the work roll, mounted on the side In accordance with the invention, in each guide block, symmetrically with respect to the splined connection, openings are made on the side of the pillows and on the transshipment side of the grooves, in which U-shaped sliders are installed flush with the surfaces of the blocks, while bores are made in the shelves of the U-shaped sliders, each of which is rigidly the case of the hydraulic cylinder axial movement of the work rolls is mounted, their rods are connected to the guide block, and the locking mechanism is also mounted on a U-shaped slider.

 In FIG. 1 shows a longitudinal section of the stand.

 In FIG. 2 shows a section BB in FIG. 1.

 In FIG. 3 shows a section CC in FIG. 1.

 The rolling stand consists of a bed 1, on the inner side of which are fixed guide blocks 2, interacting with the upper 3 and lower 4 blocks, movable in the vertical direction.

 Blocks 3, 4 through a spline connection 5 are connected with the pillows 6 of the work rolls 7.

 In the lower block 4, cylinders 8 are installed for anti-bending of the work rolls and balancing the upper work roll, and their rods 9 are fixed in the upper block 3.

 In each block 3, 4 symmetrically with respect to the spline connection 5, openings 10 are made open on the side of the pillows and on the transshipment side, into which the U-shaped sliders 11 are mounted flush with the surfaces of the blocks 3, 4.

 In each shelf of the sliders 11, a bore 12 is made, in which the housing of the hydraulic cylinder 13 of the axial movement of the rolls 7 is rigidly mounted, and its rod 14 is connected to the corresponding block 3, 4.

 On the slider 11, on its outer side, a fixing mechanism 15 is mounted with a drive from the hydraulic cylinder 16 interacting with the tooth 17 of the pillow 6.

 The device operates as follows.

 If necessary, the axial movement of the work rolls 7 includes hydraulic cylinders 13, their rods 14 associated with the block 3, 4 remain in place, and the body together with the U-shaped sliders 11 begin to move along the axis of the roll 7 and pull it along, because the tooth 17 of the pillow 6 is fixed in the slider 11 by the latch 15.

 In this case, the pillow 6 has sliding surfaces only in a spline connection, and relative to the block 3, 4, sliding occurs on the surface of the slider 11, this increases the durability of the contact surface of the work roll cushion.

 Due to the fact that the axial displacement cylinders 13 are mounted in blocks 3, 4 and move with them in the vertical direction, when the diameter of the work rolls changes, the application of load during the axial movement of the rolls remains constant and is directed along the axis of the roll.

 It also increases the durability of the pillow assembly by eliminating bending moment on the roll.

 When reloading the rolls, the latch 15 releases the tooth 17 of the pillow 6.

 Moreover, the proposed design is compact, does not clutter up the space on the side of the transshipment, which greatly simplifies maintenance.

Sources of information
1. The patent of Germany N 3331055, MKI B 21 B 13/14.

 2. Patent of Germany N 3811875, MKI B 21 B 31/08 (prototype).

Claims (1)

 A rolling stand containing a bed, work and backup rolls with pillows, upper and lower guide blocks with anti-bending hydraulic cylinders of work rolls and balancing the upper work roll mounted vertically on the inside of the bed racks and connected to the side of the work roll cushions by means of a spline connection as well as hydraulic cylinders for axial movement of the work rolls and the mechanism for their fixation relative to the cushion of the work roll mounted on the transshipment side, ex characterized in that in each guide block symmetrically relative to the spline connection, openings are made on the side of the pillows and on the transshipment side of the grooves, in which U-shaped sliders are installed flush with the surface of the blocks, while bores are made in the shelves of the U-shaped sliders, in each of which the housings of the hydraulic cylinders for axial movement of the work rolls are rigidly mounted, their rods are connected to the guide block, and the locking mechanism is mounted on a slider.

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