DE2250953B2 - ROLLING STAND WITH WORK AND SUPPORT ROLLS AND A ROLL BENDING DEVICE - Google Patents

Description

The invention relates to a roll stand with working and back-up rolls and a roll bending device, the chocks of the work rolls between Bi anchored in the stator windows > cken led and to be charged for the working roller bale correction The piston-cylinder units assigned to the blocks would be connected by acting on both sides are.

In a known four-high roll stand, the chocks of the work rolls are guided in ilen chocks of the backup rolls. The ^ i.-genüberliegenden work roll chocks are mn ball correction ie two "η the Einbaustmken arranged piston-cylinder units are connected to US-PS 94 30 410) This elaborate type has the Nacnte.l that the work rolls can only be replaced together. When the work roll is changed, a lot of time is lost because the pressure medium connections have to be loosened and re-established each time.

In a further known four-high stand, the work roll chocks are guided between m blocks attached to the stator star. In the blocks .ο there are three or four cylinders each, in which pistons are accommodated to act on both sides of the work roll chocks. The blocks for machining the cylinder and for assembly must be designed in several parts. This type of construction is therefore complex. A further disadvantage is that the overall length of the cylinders arranged one above the other and the need for the balancing cylinder, determined by the contact path and the guide length of the pistons, result in a size of the blocks which requires a relatively large diameter of the work rolls. A use of very thin work rolls, which is advantageous for certain rolling proportions, is therefore not possible with this roll stand (DT-AS 16 02 142).

Finally, a roll stand is also known, with work roll chocks guided in one-piece blocks be employed by levers mounted on shafts in the blocks. There are more on the waves Arranged levers on which pressure cylinder attack. This adjusting device is through the long Power path with complex connection points and bearings with play inaccurate. Because the arms are limited can be inclined, only a short adjustment path is oired Work rolls severely narrowed. Since, in addition to the waves, there are also balancing cylinders in the blocks are arranged, there is a minimum height for this, which the possibility of reducing the work roll diameter narrowly limited (DT-OS 17 52 625). Mii of the invention are intended to address the disadvantages of the known Roll stands are avoided. Your goal is in particular a roll stand with between in the stud windows anchored blocks guided work roll chocks and with a simple and accurate roll bending device, working rolls with a very small diameter can be used, adjustable over a wide range and individually and quickly without loosening of hydraulic connections are interchangeable.

According to the invention this is achieved in that a lower and an upper guide piece is guided vertically displaceably on each block, one Guide piece receives the cylinder and the other guide piece is connected to the piston and the Guide pieces form-fit with the chocks through horizontal guides in the vertical direction are connected, which are continued for the roll change between the stands parallel to the rolls.

In this way it is achieved that only one piston-cylinder unit is required for roll bending on each side are required, the force of which is transmitted over a short distance to the chocks. The blocks can must therefore be kept very flat, so that the combination of thick support / rollers with very thin Work rolls is made possible. The work rolls can be exchanged individually or together for a short time will. It is only necessary to align the chocks with the guides. Pressure medium connections do not need to be resolved for this

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According to a further feature of the invention are on the blocks vertical T-guides for those with a corresponding groove provided guide pieces. This makes it possible to use the work rolls to be stored immediately after their bales. This is particularly advantageous for thin work. alzen.

The blocks can be connected parallel to the work rolls by traverses, on which with a Roll changing device aligned tracks provided for rolls mounted on the work roll chocks are

Another advantage is seen in the fact that piston-cylinder units are provided in the blocks, the piston rods of which are directed towards an approach of the guide pieces, the extended position the piston rods of the aligned position of the upper work roll chocks to the changing device is equivalent to. The lower work roll can be lowered onto the exit lanes by lowering the lower backup roll be aligned. The piston rods can also be equipped with an additional stop for the Guide pieces of the lower work roll may be provided, the uppermost position of the piston rods corresponds to an aligned position of the chocks of both work rolls. It is thereby achieved that the work rolls can be exchanged individually or together as quickly as possible, with the backup rolls remain in the framework. Defective rolls can even be replaced without the rolling stock beforehand must be threaded out of the scaffolding.

An exemplary embodiment of the invention is shown in the drawing. Show it

F i g. 1 the installation in the stud window of a four-high scaffolding in section,

F i g. 2 is a horizontal section above the work roll chocks.

In the window opening of a roll stand 1 blocks 2, 3 are attached, in which balancing cylinder their piston rods 4, 5 are arranged, the chocks 6 guided in the stator window of an upper one Hold support roller 7. Between the upper back-up roll 7 and a lower back-up roll 8 there are work rolls 9, 10 arranged with chocks 11,12

On the blocks 2, 3 vertical T-guides 13 are provided on the inside of the stand, on which as Guide pieces 14, 15 formed cylinder 18 and piston 19 with a corresponding T-groove displaceable are stored. The guide pieces 14, 15 are provided with guide claws or horizontal guides 16, 17 provided, which engage in lateral guides on the chocks.

The pressure medium cylinders 18 are used for positive or negative bale correction of the work rolls 9, 10 can be acted upon on both sides.

The blocks 2, 3 are connected by traverses 20 running parallel to the rollers, on which tracks 21 for laterally mounted on the chocks 11, 12 rollers 22, 23 are provided. The tracks are aligned a roll changing device 27. To extend the work roll chocks 11, 12 are on the Aligned webs 21 This takes place in the case of the lower work roll 10 lying on the back-up roll 8 Lowering of the support roller 8, the guide pieces 14 resting on a stop 28.

To align the upper work roll chocks 11 are in the blocks 2, 3 in the area of T-guide 13 piston-cylinder units 24 provided, the piston rods 25 of which support the guide pieces 15 on a projection 26 provided on them. on In this way, the work rolls 9, 10 can independently of the backup rolls 7, 8 individually or together can be changed quickly.

1 sheet of drawings

Claims (5)

; ν. Patent claims: ii; 1. Roll stand with work and backup rolls and 'fine roll bending device, with the installation -' "pieces the work rolls between in the stand-. blocks anchored to the window and to the ^ Loading for the work roll bale coring structure thanks to the blökjcen that can be acted upon on both sides associated piston-cylinder units connected are, characterized in - that on each block (2,3) a lower and an upper Guide piece (14,15) is guided vertically displaceably, one guide piece (14) the cylinder ■ (18) receives and the other guide piece (15) with \ the piston (19) is connected, and the guide ^ pieces (14,15) with the chocks (11,12) through 'Horizontal guides (16, 17) in the vertical direction Are positively connected for the roll change between the stands parallel to the Rolling are continued. 2. Roll stand according to claim 1, characterized in that that on the blocks (2, 3) vertical T-guides (13) for those with a corresponding Grooved guide pieces (14,15) are provided. 3. Roll stand according to claim 1 or 2, characterized in that the blocks (2,3) parallel to the Work rolls (9, 10) are connected by cross members (20) on which a roll changing device (27) aligned tracks (21) for rollers mounted on the work roll chocks (11, 12) (22,23) are provided. 4. Roll stand according to one of claims 1 to 3, characterized in that in the blocks (2, 3) Piston-cylinder units (24) are provided, the piston rods (25) of which on a projection (26) of the Guide pieces (15) are directed, the extended position of the piston rods (25) of the corresponds to the aligned position of the upper work roll chocks (11) to the changing device (27). 5. Roll stand according to claim 4, characterized in that the piston rods (25) with a additional stop for the guide pieces (14) of the lower work roll (10) are provided, wherein the top position of the piston rods in an aligned position of the chocks (11, 12) of both Work rolls (9, 10) correspond to the changing device (27).