DE1215096B - Device for moving intermediate pieces parallel to the roll axis between the chocks and the adjusting spindles of roll stands - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

B 21b

German class: 7 a - 23

Number: 1215 096

File number: U 85991 b / 7 a

Filing date: January 4, 1962

Opening day: April 28, 1966

The invention relates to a device for moving intermediate pieces parallel to the roller axis between the chocks and the adjusting spindles of roll stands, with the spacers Rail-like in also parallel to the roller axis, arranged above the chocks Guide bridges are guided.

Intermediate pieces of the type indicated above can be in the form of simple filler pieces, consist of pressure measuring devices or have the form of roller thrust bearings. It is often a special device for pulling out the spacers below the adjusting spindles provided to create a gap between the chocks of the top roller and the lower one To create part of the adjusting spindles. Creating such spaces is for a quick Changing the work rolls, for example in the case of a four-high stand, is essential, otherwise the roll change Could only be done if the adjusting spindles were adjusted accordingly Pieces have been turned back. About the creation of such a gap by turning of the adjusting spindles, which normally have a very flat thread pitch, can be reached takes a lot of time.

The previously known devices for removing the spacers have a number of disadvantages. For example, they have an elongated ramp that is designed so that they between the roll stands and is supported by the chocks of the top roll.

With this construction, when removing the top roller, it is essential to either put the ramp together completely removed from the roll stand with the intermediate pieces or a special device provide that supports the ramp and the spacers. In addition, it is well known Construction usual to form the lower ends of the adjusting spindles convex, with these from corresponding Recesses of the bearing blocks are added to the angular displacement of the To compensate for chocks when the rolls deflect under the influence of the rolling pressure. at With this construction, the screws must be raised sufficiently when the rollers are removed so that the lower ends of which come free from the recesses in the bearing blocks. However, this is the case in most Cases associated with a considerable loss of time.

A device has also already become known in which the intermediate pieces hang on a bridge which, although not on the upper chocks, is not connected to the device for parallel roller axes
Moving intermediate pieces between
the chocks and the adjusting spindles
of roll stands

Applicant:

United Engineering and Foundry Company,

Pittsburgh, Pa. (V. St. A.)

Representative:

Dr. H. Maeckler, lawyer,
Düsseldorf, Bleichstr. 14th

Named as inventor:

George Eimer Trapp, Bethel Park, Pa. (V. St. A.)

Claimed priority:

V. St. v. America from Wed 14, 1961 (124170) - -

is supported, but by a rod running downwards in the roll stand with arranged on levers Counterweights are worn. This known device is complex and also hampers not only the levers that run over almost the entire height of the scaffolding and its width Rolling operation, but also the installation and removal of the rolls when changing rolls.

The object on which the invention is based is to provide an improved device for parallel roller axes Moving the spacers to create, this device not from the chocks the top roller is supported and therefore does not require any auxiliary devices to support it their removal from the rolling stand is still required. According to the invention this The object is achieved in that the guide bridge with the ends of the adjusting spindles facing the chocks can be raised and lowered. Furthermore, the invention is expressed in that the guide bridge with bearing bushes in ring grooves provided at the ends of the adjusting spindles engages with radial and axial play. Finally, the device according to the invention is advantageous designed so that the spacers on sliders hanging and vertically liftable provided on the outer edges of the guide bridge Lanes are guided and forward below the support blocks.

609 560/184

are seen, which face the surface of the intermediate pieces facing the spindle ends, wherein the height of the support blocks is dimensioned so that in the event of a frictional connection between the spindle, the intermediate element and chock the bushing contact-free in the annular groove and the sliding pieces contact-free above the Web lie. According to a further feature of the invention, the sliding pieces are provided with a bottom piece connected and serve as a carrier of a support approach for the support blocks.

The invention is explained in more detail with reference to the exemplary embodiments shown in the drawing. It shows

F i g. 1 a vertical section through a four-high mill stand,

F i g. 2 a view of the displacement device for the intermediate pieces,

Fig. 3 is an elevation of the device shown in Fig. 2;

4a is a partial view of that shown in FIGS Device, according to the line IVa-IVa in Fig. 2, this view the Represents the state of the device at the beginning of the extraction of the intermediate pieces, and

4b shows a representation similar to FIG. 4a, but in a section along the line IVb-IVb in FIG F i g. 2, showing the state during rolling.

The work rolls 13 and 14 and the backup rolls 15 and 16 are located in the roll stands 11 and 12 stored. As usual, the journals of the support roller 15 are mounted in chocks 17 and 18. vertical Adjusting screws 19 and 20 are used to adjust the rollers and are in a known manner by means Worm and gear set 21 driven.

A known device for balancing the rollers consists of a hydraulic piston-cylinder set 22, which is supported on the uprights 11 and 12, and a transverse element 23, which with vertically extending links 24 is in connection. The links 24 end in horizontal ones Lifters 25, which extend into the window of the stand and are provided with projecting surfaces which engage in correspondingly shaped surfaces on the chocks 17 and 18 of the back-up roll. In this way an upward force is exerted on chocks 17 and 18, to keep them in contact with the adjusting screws 19 and 20.

As shown in FIG. 1 can be seen between the lower surfaces of the adjusting screws 19 and 20 and the chocks 17 and 18 spacers 26 and 27, respectively. The spacers show a Connection piece 28 (see. Fig. 4a and 4b) with a solid, circular base piece 29, which rests on the chock 17 of the support roller 15. Inside the sleeve-shaped connector 28 there is a vertically arranged thrust bearing, which consists of two oppositely arranged Roller bearing retainer rings 30 and 31 are made, each ring having corresponding tapered surfaces has to receive and guide the freely rotatable tapered rollers 32 of the bearing. The retaining ring 30 is attached to the bottom piece 29 of the connecting piece 28 and is supported by this while the retaining ring 31 is fastened to a bearing piece 33, which in turn is rotatably supported by the rollers 32 will. The bearing piece 33 is prevented from any longitudinal movement in that it is with a central cylindrical recess 34 is provided at its lower end, this recess in a correspondingly ring-shaped bottom projection of the bottom piece 29 engages, while an annular Bearing sleeve 36 between the vertically opposite surfaces of the base attachment 35 and the cylindrical recess 34 is arranged to absorb the frictional force caused by

xo the surfaces can slide on top of each other. The top of the bearing piece 33 is convex formed, wherein they with the corresponding concave underside of the bearing piece 37 in contact stands. The top of the bearing piece 37 is flat and is in contact with the corresponding flat surface of the lower end of the adjusting screw 19. By having the lower ends the adjusting screws do not rest in the corresponding recesses of the associated bearing pieces, but rather are flat and can rest on the top of the intermediate pieces, which is also flat these as soon as they have been lowered away from the adjustment screws or the adjustment screws slightly have been raised in relation to the intermediate pieces, effortlessly and immediately under the adjusting screws be pulled out.

The adjusting screw 19 is provided with an annular groove 38 including a collar part 39, wherein immediately at the lower end of the set screws and the top of the connector 28 a support attachment 40 is attached to its vertical wall, the purpose of which will be explained later.

The displacement device according to the invention for the intermediate pieces, which is quick and effortless Removing the same from the windows of the roll stand allows, however, without removing them from the Roll stand itself would have to be removed or any auxiliary devices for support would be required consists of a horizontal guide bridge 41 with two symmetrical individual parts, which are connected to one another by a series of bolts 42 into a single rigid part. the Rigidity of the guide bridge 41 is additionally increased by parallel support blocks 43, which with the The underside of the guide bridge 41 are connected and are located on the two longitudinal sides of the bridge 41 extend over their entire length. The guide bridge 41 has two circular openings, wherein the thickness of the guide bridge is kept so that the circular edges of the openings loosely into the Ring grooves 38 of the adjusting screws 19 and 20 fit and their underside on the collar part 39 of the Adjusting screws supported during the displacement of the spacers.

The height of the annular grooves 38 and the associated annular parts of the guide bridge 41 is here dimensioned so that the top and bottom of the guide bridge 41 not with the rolling the corresponding, opposite surfaces of the annular grooves 38 come into contact. In the openings the guide bridge 41 are ring neck bearing bushes 45 which partially encompass the lower side of the guide bridge and, in this respect, the corresponding one upper horizontal surfaces of the collar parts 39 are opposite. Between the storage areas 44 of the annular neck bushings 45 and the opposite vertical surfaces of the annular grooves 38 is a some leeway available (Fig. 4a and 4b).

The intermediate pieces 26 and 27 are fastened to them, inverted L-shaped sliders 46 on the Guide bridge 41 suspended. Each intermediate piece 26, 27 is provided with horizontal projections 47, those parallel to the long sides of the guide bridge

41 and to which the sliders 46 are fastened by bolts 48 and wedges 49. Every intermediate element has two pairs of such sliders 46. The upper ends of the sliders 46 have with Bearing metal lined surfaces that engage in corresponding tracks 50, which on the Guide bridge 41 are arranged and over which the intermediate pieces attached to the sliders 46 26 and 27 can be moved in the horizontal direction. On both sides of the guide bridge is each a horizontally lying piston cylinder set 51 is arranged, the cylinder ends with projections

42 of the guide bridge 41 are connected and the piston ends are attached to lugs 53, which in turn are located on the sliders that are outermost in each case. These cylinder sets 51 are operated synchronously to the spacers 26 and 27 from their operating position each under the Adjustment screws 19 and 20 in their rest position approximately in the middle between the two roll stands to move.

The support lugs 40 extend below the support blocks 43 of the guide bridge 41 and are in The area of the overlap is provided with wear rings 54 on their upper sides, which are as thick are that their surfaces are in contact with the undersides of the support blocks 43 during the rolling operation come (Fig. 4b), while in the rest position, the wear rings 54 and the support blocks

43 are at a certain distance from each other.

As mentioned, the guide bridge 41 is on the adjusting screws 19 and 20 according to the invention attached, resulting in two important advantages of the device. First of all, there is the guide bridge 41 is supported by the adjusting screws 19 and 20 as soon as the support roller 15 is formed is, no need to pull the bridge 41 as a whole from the roll stand, as is the case with conventional devices are the case when the bridge is supported by the chocks of the top roll will. Second, in view of the fact that the guide bridge 41 of the adjusting screws 19, 20 is supported, the intermediate pieces 26 and 27 always in the correct position with respect to the lower ends of the adjusting screws 19 and 20 and can therefore always be in a position below the Adjustment screws 19, 20 are brought without first having to check whether the adjustment screws 19, 20 are also ramped up enough for this purpose. This makes the roll change extra accelerated and the risk of damage to the parts excluded. But that was just that not the case with the devices known so far if the attempt is made as a result of inattention has been made to slide the spacers into their position below the adjusting screws, without having previously created the space required for this purpose by raising the adjusting screws had been. Another advantage of the device according to the invention results from the fact that the guide bridge 41 during the rolling operation with the adjusting screws 19 and 20 and the sliders 46 are not in contact with the guide bridge 41. In this way the one hand becomes a unnecessary wear of the adjusting screws 19, 20 and the guide bridge 41 and on the other hand the Transfer of any rolling forces to the sliders 46 and the guide bridge 41 avoided.

During the rolling operation, as shown in Fig. 4b, the lower ends of the adjusting screws

19 and 20 in contact with the tops of the bearing pieces 37 and the undersides of the bottom pieces 29 of the connecting elements 28 in contact with the opposite tops of the chocks 17 and 18 of the support roller 15. As soon as this state has occurred, the wear rings 54 come onto the Support lugs 40 with the undersides of the support blocks 43 of the guide bridge 41 in contact, whereby the guide bridge 41 out of contact with the collar parts 39 of the adjusting screws 19 and

20 is brought. In this way, the adjustment screws are used to adjust the rollers during actuation any friction between the horizontal surfaces of the screws 19, 20 and the corresponding ones Areas of the guide bridge 41 avoided. With regard to the location of the guide bridge 41 and the Sliders 46 to each other during the rolling operation shows that the height of the connecting pieces 28 and the sliders 46 together is so large that in the rolling position (Fig. 4b) gaps between the horizontally adjacent surfaces of the tracks 50, the guide bridge 41 and the sliding surfaces of the sliders 46 are present. In this way, the on the fasteners 28 resting rolling pressures completely absorbed by the intermediate pieces 26 and 27 and not transferred to the sliders 46.

With regard to the position of the individual parts in relation to one another while the intermediate pieces are being pulled out or exchanged 26, 27 results from Fig. 4a that by raising the adjusting screws 19 and 20 after their undersides come off the bearing pieces 37 and the spaces between the guide bridge 41 and the collar parts 39 of the adjusting screws 19, 20 are omitted, with further Movement of the adjusting screws 19, 20, the guide bridge 41 is forced to reduce the vertical movement of the Adjusting screws 19, 20 to participate, so that in the end the support blocks 43 of the bridge 41 from the Contact with the wear rings 54 come out. At the same time, the tracks 50 with the Brought sliding surfaces of the sliders 46 into contact. After this initial movement of the adjustment screws 19, 20 is completed, an additional slight rotation thereof lifts the sliders 46 and thereby causes the bottom pieces 29 of the connecting pieces 28 to be removed from the chocks 17 and 18 are separated (Fig. 4 a), whereby the intermediate pieces 26, 27 are released so that they can be pulled out by switching on the piston-cylinder sets 51 under the adjusting screws 19, 20 can.

In a practical application of the present invention in which the speed of the adjusting screws 19, 20 was about 25 mm per minute, the device was designed so that during the rolling operation a distance of about 3 mm between the tracks 50, the guide bridge 41 and the sliders 46 existed, with a distance of the same order of magnitude between the guide

bridge 41 and the collar parts 39 of the adjusting screws 19 and 20 was present. As a result of rotation the adjusting screws 19, 20 by a little more than a quarter turn became the spacers released and could thus be moved into their rest position between the two roll stands.

In a roll stand with the device according to the invention, it is extremely easy to adjust the adjusting screws 19 and 20 to rotate slightly so as to remove the spacers 26 and 27 from the chocks 17 and 18 to release the backup roller 15 and to take the piston-cylinder sets 51 into operation to in this way the intermediate pieces 26 and 27 at the same time in their rest position between the two roll stands to pull. When new work rolls are inserted into the two stands, that can Reintroduction of the intermediate pieces 26 and 27 quickly and easily by the reverse operation of the piston-cylinder sets 51 take place, especially since the adjustment screws 19, 20 via the guide bridge so 41 carried intermediate pieces 26, 27 are always in the correct, installation-appropriate position on the undersides the adjusting screws 19 and 20 are located. As soon as the adjusting screws 19, 20 are lowered, in order to bring the intermediate pieces into contact with the chocks 17 and 18, the guide bridge 41 is automatically out of contact with the collar parts 39 of the adjusting screws 19 and 20 removed and the sliders 46 automatically detached from the tracks 50.

On the other hand, there is also the possibility that at a maximum distance between each other opposite faces of the work rolls, d. H. if the stitch opening is large enough to allow required opening between the support jaws and the work rolls for the purpose of replacement To obtain the latter, it is not necessary to use the adjusting screws to release the intermediate elements start up for their expansion. In this case, the hydraulic piston-cylinder set 22 is actuated, so that the support roller 15 goes so far down that the intermediate pieces 26 and 27 through her Dead weight fall down a sufficiently large piece, creating a sufficient distance for actuation the displacement device is created or a slightly larger distance to the separation the undersides of the intermediate pieces 26 and 27 from the upper sides of the chocks 17 and 18.

To replace the backup rollers 15, it is not necessary to use the guide bridge 41 or the To remove intermediate pieces 26 and 27 from the roll stand, as is the case with the previously known roll stands is the case because both the guide bridge and the intermediate elements 26 and 27 through the Adjustment screws 19 and 20 are worn.

Claims (4)

Patent claims: 1. Device for moving intermediate pieces parallel to the roller axis between the chocks and the adjusting spindles of roll stands, in which the intermediate pieces are rail-like on a guide bridge that is also parallel to the roller axis and arranged above the chocks are guided, characterized in that the guide bridge (41) facing the chocks (17, 18) Ends of the adjusting spindles (19, 20) can be raised and lowered. 2. Apparatus according to claim 1, characterized in that the guide bridge (41) with Bearing bushes (45) in annular grooves (38) provided at the ends of the adjusting spindles (19, 20) engages with radial and axial play. 3. Apparatus according to claim 2, characterized in that the intermediate pieces (26, 27) hanging from sliders (46) and can be lifted vertically on the outer edges of the guide bridge (41) provided tracks (50) and provided below the bridge (41) support blocks (43) the surface of the intermediate pieces (26, 27) facing the spindle ends opposite, wherein the height of the support blocks (43) is dimensioned so that when there is a frictional connection between Spindle (19, 20), intermediate piece (26, 27) and chock (17, 18) make contact with the bush (45) in the annular groove (38) and the sliders (46) are in contact with the track (50). 4. Apparatus according to claim 3, characterized in that the sliders (46) with a Floor piece (29) connected and carrier of a support attachment (40) for the support blocks (43) are. Considered publications:
U.S. Patents Nos. 2,853,905, 2,260,762,
591713. 1 sheet of drawings 609 560/184 4.66 © Bundesdruckerei Berlin