DE1452724A1 - Rolling machine with inclined rollers - Google Patents

Description

Rolling machine with inclined rollers The invention relates to a rolling machine with inclined rollers. The invention particularly relates to an apparatus for continuous Rolling a flat metal strip, this metal strip being bent in succession as it goes through a series of forming rollers, making it the final you want rorm receives.

In the following, an exemplary embodiment of the invention is explained in detail with reference to the drawing: l'ig. 1 shows a section through the main part of the device according to the invention. Fig. 2 shows a section of the main part of a conventional rolling machine.

Yig.-3 shows an enlarged section after Pig. FIG. 4 also shows an enlarged section of the device according to FIG. 1, the pressing points a -.- touching the lower roller elements at each edge of the upper rollers.

FIGS. 5 and 5t show the spherical bearings for the positive drive of the upper rolling elements.

Fig ». Figures 6 and 61 show the spherical bearings built into the upper rolling elements.

In Fig. 1 , 1 is the upper roller which is arranged and fixed on the shaft 5 - and rotates with it. 2.- 3 and 4 are connected to each other, -to form the lower'Vlalze, whereby the component 2 forms the middle part of the roller, 3 is the left frustoconical end piece with a surface .. which is appropriately inclined with respect to the straight longitudinal cylinder surface of the middle part 2 and 4 - is in the same way the right frustoconical end piece with a corresponding surface, the lower roller, which is composed of parts 2, 3 and 4, as mentioned above, sits on shaft 6 and is on you, attached and rotated with this. The shafts 5 and 6 are arranged in such a way that the axis XX of the shaft 5 is parallel to the axis VV of the shaft 6 .

Also essential are the points of contact of the upper roller It, denoted by a in FIG. 1 , which lie opposite the atelles # where the ends of the middle roller part 2 intersect the left and right end pieces 3 and 4. 7 and 71 are bearings for the shaft 59, 8 and 81 are bearings for the Wellq 6. 9 is a connection for the drive mechanism, 10 is a worm gear for the drive mechanism, which is directly connected to a drive motor. 11 to 14 are gears for power transmission 15 and 151 are adjusting screws for the upper rollers and 16 is a bite during the rolling process.

In the -in Pig. 2, the upper roller A can be adjusted against the lower roller consisting of parts 2, 3 and 4 using the adjusting screws 15 and 15t. The pressing piece 16 is formed during the advancement in a certain direction in the roll gap between the upper and lower tialze, the forming of the pressing piece 16 depends solely on the force acting perpendicularly on it. It follows that if the edge piece a of the upper roll opposite the points where the ends of the middle roll part 2 intersect the two end pieces 3 and 4, after a few rolling operations the pressing piece 16 can no longer be sharply bent by the device.

This is why the product obtained has a larger curvature radius than desired, thus losing the accuracy of the shape of the product.

In FIG. 1 , the structure of the improved upper roller is shown, the parts which correspond to those of FIG. 2 having the same reference numerals as in FIG. 2. According to the invention, the upper Vialze is composed of two roller elements 17 and 18 , which sit on spherical bearings 19 and 20, their centers 0 1 and 0 2 on the axis XX have an appropriate distance from each other.

The spherical bearings can, if desired, be grooved so that they rotate integrally with the shaft 5 , and the distance between 0 1 and 0 2 can be limited to be less than the width of the central vial the lower roller.

19 and 20 (Fig. 3) are the inner races of the spherical bearings, 19f and 2-01 the outer races of the spherical bearings. C and 0, S and S and S-Zvi 11 C2 3 1 2 3 4 rule pieces spacer sleeves. T he spherical bearings have also more - ere steel balls B (Fig 5.and. 6). The number of steel balls, their diameter and their quality can optionally be determined according to the size of the load. The recesses K serve to connect the inner race rings 19 and 20 to the shaft 5 . Various slots 1 with a semicircular cross-section and an oil groove (not shown) are provided on the outside of the inner race rings so that the steel balls can slide on the outside of the inner rings. Various recesses in a conical or spherical shape H and an oil groove (not shown) are provided on the inside of the outer races to accommodate the steel balls.

Through the steel balls B, which are inserted into the conical or spherical recesses in the outer ring and into the slots in the inner ring with a semicircular cross-section, the outer races 191 and 20t can be driven when the inner races 19 and 20 are rotated.

The bearing cover plates 21 and 22 have cylindrical openings whose slides are offset by about 2 to 3 mm with respect to the axis X of the shaft. A cylindrical part protrudes on one side of the outer races 19t and 201 and fits into said cylindrical openings, whereby the rotation of the shaft 5 is transmitted to the bearing cover plates 21 and 22.

The bearing cover plates 21 and 22 are firmly connected to the roller parts by screws, so that this entire body can be rotated. That is, when the shaft 5 is driven-9, the roller elements 17 and 18 can also be rotated.

The bearings 19 and 20 are not axially displaceable on the 'äelle 5. As shown in Fig. 3 .. the inner race rings 19 and 20 are fixed in a predetermined position by the cylindrical spacer sleeves S and S and the spacer sleeves 0 and -'0. 1 2 12 02 - 3 This means that the inner races 19 and 2.0 cannot move during a work process. The length of the spacer sleeve 0 3 is determined by the width - of the middle roller part 2 of the lower roller (height of the workpiece N) and the angle of inclination 0 between the upper roller axis X and the axis of the roller elements. It is very expedient to choose the angle of inclination, 9 in the range from 5 to 15 0.

As can be seen from FIG. 4, the surfaces 17a, 17b, 1, 8a and 18b of the upper roller elements are not parallel to the corresponding surfaces 3a, 4a and 2a of the lower roller during the rolling process.

The two rolling elements 17 and 18 können.in a certain range swing right or left hand in the drawing plane around the respective centers 0 and, 0 of the spherical bearing, 1 22 that operates under the roll pressure of the upper roller and swinging each of the rolling elements of the upper roller at an angle 9 to the axis X - X. the size of the angle 0 can be determined by the length of the middle roll portion of the lower roller, the distance between the centers-01 and 0 2 and the distance between the axis X - X and the other axis X ' - X ,. If, in the rolling device according to the invention described above, the shaft 5, which is firmly connected to the upper rolling elements 17 and 19 , is placed against the lower roller arrangement consisting of parts 2, 3 and 4, a force component acts on the pressure point a at each edge of the upper roll elements and against the edge part of the lower roll in a direction to push the elements apart. Therefore, as the wear on the roll elements 17 and 18 of the upper roll progresses during production, the pressure points a against the edge parts of the lower roll That is why the accuracy of the drawing does not decrease at the edge parts of the pressed piece, and despite this wear, a product with high accuracy and the best appearance is achieved, and the service life of the rolling plant is also increased. The edges of the upper edges are automatically drawn against the edges the lower rollers directed so that on the one hand Weristücke can be produced with sharp corners and on the other hand can be driven with higher loads; so that thicker sheets can be used. The support of the rollers of the device according to the invention is very simple, so that the upper rollers according to the invention can be installed instead of the conventional upper rollers. The replacement of the Vialze * elements is just as easy. The arrangement according to the invention thus greatly increases the efficiency and production.

For further explanation and for a better understanding of the invention the following is stated: FIG. 7 shows the front view of a VY "alzstationg from which parts have been removed in order to illustrate the device according to the invention and to show an exemplary embodiment of the spherical bearing used.

Fig. 8 is an enlarged fragmentary sectional view showing an upper form rolling element engaged with an edge of a strip to be rolled.

Fig. 9 is a partial section along the line IX-r .X of Fig. 7 showing another preferred embodiment of a peripheral bearing of the invention.

Fig. 10 is a partial section along line XX of Fig. 7ig. 9. In FIG. 7 , a forming roll stand, generally designated 1 , is shown, which includes the improvement according to the invention in #second. The framework 1 is of the usual construction with two support frames or uprights 2 and 3 which are used to rotatably receive a pair of parallel, spaced shafts 4 and 5 by means of suitable bearings, not shown. Depending on the embodiment of the invention in question, the shafts 4 and 5 can be stopped or driven by a suitable gear (not shown). A conventional back-up roller, generally designated 6 , sits on the iielle 5 and is connected for rotation therewith by suitable means not shown. The roller 6 is held at a predetermined distance from the frames 2 and 3 by cylindrical spacer elements 7 and 8 . The roll 6 has a cylindrical roll piece 9 and a pair of tapered end pieces 10 and 11 which cooperate to form the edges 12 to which a belt 13, which is continuously guided through the stand 1 , is adapted shall be. Suitable devices on racks 2 and 3, such as setting table: rough. Berk (not shown) - $, to which control -.. 4E9 & batandes zwisehen the shafts 4 and 5 is used and applied so pressure on the belt 13 between the support roll 6 and the upper roller assembly generally indicated at 14 and forms the improvement according to the invention. While the support roller 6 is shown in one piece, it is evident that in some examples it may be desirable to subdivide the roller in the region of the roller section 9 and to divide the roller halves thus formed by suitable means , similar to the spacers 7 and 8, to be arranged at a distance.

The upper roller assembly 14 has two form roller elements 15 and 161 which are carried by spherical bearings, generally designated 17 and 18 , the bearings being spaced in the axial direction of the shaft 4 and their centers at 19 and 20 -. As shown in Fig. 1 , the bearings 17 and 18 and thus the centers of rotation 19 and 20 are optionally fixed with respect to the edges 12 of the roller 6 and with respect to each other by removable cylindrical spacers 21, 22 and 23 * In the first embodiment of the invention are, as shown in Fig. 7 , form roller elements 15 and 16 frictionally driven by contact of their surfaces with the belt 13th. The lagez 1,7 and -. 18 -.e # believe that the 'Walzelemonte-. can rotate #free with respect to the .. 'shaft 4, thief. if desired "-leer 'Lau # # Eon can -o- of: Trough not ge dei # te SETUP Ungen abgebreilst against rotation.!' -wöl-the can in the second bevorzii, #." th embodiment (Figures 9 and. 10) form rolling elements 15 and 16 are driven by the shaft 4 via the bearings 17 and 18. In general, it is desirable "to effectively drive the strip to be rolled by effectively driving the forming roll elements to prevent the strip from bending immediately in front of the roll stand. In addition, positively driving the forming roll elements ensures that the peripheral speed of such rolling elements can be more evenly adapted to the speed of the strip in order to delay a swaying of the rolling elements.

In both embodiments according to the invention, the bearings 17 and 18 have an inner part 24 which is fixed by a wedge or a spring 25 to rotate with the shaft 4, this wedge or spring 25 being received in grooves 26 and 27 , located in the shaft 4 and in the inner part 24, the bearings have an outer part 28 which is fixed for rotation with the rolling elements 15 or 16 by a wedge or spring 29, this wedge or spring 29 in grooves 30 and 31 provided in the outer part 28 and the rolling elements 15 and 16 . The inner parts 24 and the outer parts 28 have cooperating peripheral surface pieces 32 and 33. The bearings 17 and 18 can be arranged in any desired manner, for example the outer part 28 can consist of two parts which are connected by screws. As shown in FIGS. 7 and 10 , the connecting elements 15 and 16 are provided with openings 34 and 35 in order to receive the outer bearing parts 28 . The parts 28 are held in the openings 34 and 35 by annular bearing plates 36 and 37 which are removably attached to the rolling elements 15 and 16 by screws. This arrangement allows the rolling elements; when they are so worn that they can no longer be used, they can be removed from bearings 17 and 18.

In the most extensive embodiment of the invention, the spherical surface pieces 32 and 33 allow a universal movement of the bearing parts 24 and 28 and thus a relative rotational movement and a pivoting movement of the rolling elements 15 and 16 with respect to the axis of the shaft 4 about the centers 19 and 20. In the second and preferred embodiment of the invention, fastening devices, generally designated 29, are provided to lock the inner parts 24 and - the outer parts -e 28 and thus the Vialzelemente-15 and 16 for rotation with the vielle 4, while the rolling elements 15 and 16 with respect to the # 1 axis of the shaft 4 -um dfe 1,1fitte '19 and 20e as shown generally in Fig. 7 can pivot. The locking device 39 has a groove 40 in the spherical surface pieces 32 of the inner part 24, a conical or hemispherical recess 41 in the spherical surface pieces 33 of the luss parts 28 and a ball bearing 42. The ball bearing 42 is received in the recess 41 for a relative rotational movement and in the groove 40 for a relative rotational and sliding movement. The groove 40 and the recess 41 on the parts 24 and 28 can be reversed if desired.

The rolling elements 15 and 16 have annular circumferential shaped surface pieces 43 and 44 which cooperate with the back-up roller 6 in order to deform the strip 13 in the region of the edges 12. The #falzelemente 15 and 16 also have oppositely and inwardly inclined 'surface CD pieces 45 and 46, which define the forming surface pieces 43 and 44. Die Flalzelemente 15 and 16 It is desirable to incline the surface pieces 45 and 46 with respect to the parts 9, 10 and 11 of the support roller 6 by an angle B, this angle B being equal to the angle A by which the rolling elements 15 and 16 with respect to the axis the -1, elle 4 are inclined. The angle A is in the range from about 5 to 15 °. # Installation of the device according to the invention in a roll stand four the: bearings 17 and 18 drawn onto the shaft 4 and a spacer 23 of sufficient length holds the -: itte 19 and 20 at a distance that allows the rolling elements 15 and 16 to pivot between 5 and 15 0 with respect to the axis of the * vIelle 4 when the shaped surface pieces 43 and 44 come into contact with the belt 13 in the areas of the edges 12, wherein the edges 12 have a predetermined distance VT. Preferably the centers 19 and 20 are equidistant from and on opposite sides of a plane equidistant from the edges 12 to prevent unbalanced axial forces from acting on the uials.

It is obvious that if the `Light 4 is pressed by suitable set screws against the Vielle 5, the rolling elements 15 and 16 are then pushed away from each other as shown in Fig. 7, whereby the shape of flat pieces 43 and 44 in the regions of the edges 12 exert a 2reßkraft on the band 13 , this.Kraf.t has components which are directed both perpendicular and parallel to the axes of the shafts 4 and 5 . The relative axial position of the centers 19 and 20 with respect to the edges 12 determines the size of the individual force components.

Since the wear of the Yorm surfaces 4 and 44 progresses. If the points or surfaces of the flashing elements 15 169 which engage in the band 13 are outwardly against the edges 12, presses, which is why the sharpness or the degree of edge rounding of the strip. do not change, and the life of the rolling elements is increased. Furthermore, by the drive of the Vialz elements from the outside, any pivoting that occurs, for example, in the case of the rolling elements is compensated for.

The number of rolling stations in the rolling mill in which the C3 device according to the invention is used, and the arrangement of such stations, is normally determined by the desired cross-section of the strip and the thickness of the strip to be deformed. However, in a conventional 8-station rolling mill on which U-profiles or box girder profiles are produced, the device according to the invention is normally used in one station and this station is placed in the 6th or 7th position. In systems with 20 or more stations - the device according to the invention is normally used in stations 13 to 16 .

While the apparatus of the present invention has been shown and described as having two spherical bearings axially spaced apart and arranged in a prescribed #jusaimuenhang with respect to two edges formed on a # 7 back-up roll, further with a pair Roll forming elements, one of which is seated on each of the spherical bearings, the device according to the invention can also have only one spherical bearing. It can have only one spherical bearing and only one rolling element or a set with three or more such groups, depending on the number of edges that are to be produced on the strip to be rolled. If, furthermore, the angle of the various edges to be produced or the thickness of the parts of the strip to be rolled which adjoin the edges varies, the distance between the corresponding spherical bearings and their corresponding edges can also be varied.

The invention is not intended to besehränki beschriebenen'Ausführungsformen, but only by the Umf - ang be of Claims limited.

Claims (2)

P atentans p r U che 1. rolling mill with at least one Vialzstation with paralleleng spaced # - tural and M 'alzen on one of these, iellen, said Ufalzen have a plurality of relatively inclined surface pieces, the at least one edge on which. a is rolled into forming band can limit, with at least one bearing on the other of these Viellen and rolling elements of which each one is seated on each of the bearing, said #ialzenelemente have a mold face piece, which can cooperate with said edge, - to to effect the reshaping of a rolled strip, with these bearing devices allowing these roll elements to be inclined with respect to the axis of these other NV "cells, whereby when these shafts are pressed together this Pormf surface piece can exert a tensile force on the strip, which is rolled in the area of this edge, whereby this force has components) which are parallel to the axes of these vials as well as perpendicular a are directed towards them. 2. Rolling plant according to Ansl; ruch 19, characterized in that this eialzeneinrichtung has a first part which is grooved for the Drehun ,! with this other wave, and a two t-. ite part which is grooved for rotation with this '##' alzelerrienty these parts having cooperating spherical surface pressure to allow a relative sliding movement of these parts, and this roller element is driven by frictional engagement with a strip to be rolled. 3. The rolling mill according to claim 1, characterized in that said other shaft is driven and these bearings, the movement T his other Vielle can be transferred to this- roller elements. 4 * A rolling installation according An8pruch-3, characterized in that these bearings with- a first recessed portion for rotation with said other shaft and a second recessed portion for the rotation of this Valzenelementen habeng these parts have zusammehwirkende spherical-Plächenstücke that further means provided -8Ah-eri- are to wedge these parts together for a simultaneous rotary movement around the axis of the other shaft, whereby these wedges or pedals allow a relative movement of the parts, whereby this% 'älZglCMdnte bAZUglioh der- AChse of this other shaft diagonally Can be asked. 5. 7ialzäni-agig according to claim 49, characterized in that this wedge device consists of a groove in the spherical Plächenst, Üök one of these parts, a recess in the spherical plane piece of the other of these parts and a ball bearing) for a relative rotational movement in this recess and for a relative rotary movement and a sliding movement in 1 -, ia.nö = en wirai 6. Rolling plant with at least one rolling station with parallel, spaced-apart bells and rolling devices on one of these shafts, these rolling devices having relatively inclined surfaces, which can limit the spaced edges to which a strip to be rolled is fitted; further with a plurality of bearings which are axially spaced on the other of these shafts and a plurality of rolling elements on each of these bearings, each of these rolling elements having a shaped surface piece which can cooperate with one of the edges to effect the deformation of the strip to be rolled , and these bearings allow these rolling elements to be inclined with respect to the axis of this other shaft, whereby when these shafts are pressed together, the shaped surface pieces of these rolling elements in the area of these edges can exert compressive forces on a strip to be rolled, these forces having components that are both parallel to the axes of these -Uellen as well as perpendicular to them are directed. 7. Rolling plant according to claim 6, characterized by Einrich-Ll # lines to selectively fix these bearings in the axial direction with respect to each other and with respect to these edges on these rolling devices. 1.Valzanlage with at least one rolling station with parallel closely spaced shafts and a forming roller on one of these shafts, this forming roller has relatively inclined surface pieces that can limit a pair of edges to which the strip to be rolled is adapted, with two bearings with axial distance sitting on the other of these shafts, wherein the distance between these bearings is less * than the distance between these edges on the mold roll. and said bearings are equidistant from and on opposite sides of a plane equidistant from said edges; further comprising two roller elements, of which one each is sitting on each of the stock and each of the roller elements has an annular peripheral mold surface piece which may cooperate with one of these edges to the transformation to achieve a strip to be rolled, and this bearing zulasgen that these, Valzelemente can be inclined in opposite directions with respect to the axis of this other shaft, whereby when these shafts are pressed together, the shaped surface pieces of these rolling elements can exert compressive forces on a strip that is rolled in the areas of these edges, these forces having components that are both parallel and perpendicular to the axis of this Waves run and these parallel components are directed in the same and opposite directions. 9. ! F,., 'Alzanlage according to claim 89, characterized in that these rolling elements are inclined at an angle of 5 to 15 0 with respect to the axis of this other shaft. 10. Rolling plant according to claim 9, characterized in that this shaped surface piece of each Vfalzelementes is delimited by annular, radially inwardly and oppositely inclined surface pieces, these inclined surface pieces of these rolling elements are inclined with respect to this edge and form inclined plane pieces of this forming roller at an angle, which corresponds to the Iffinkel by which these roller elements are inclined. 11. #, i'alting plant with at least one - ##, i'altzstation with parallel, spaced shafts and a forming roller on one of these 'ellipses, this' forming roller has relatively inclined surface pieces that delimit the spaced-apart edges 'to which a strip to be rolled is fitted; furthermore C3 Liit two spherical bearings which sit at an axial distance on the other of these 'Vielien, the distance between these bearings is smaller than the distance between these .i.anten on this forming roller; further with two Vialzelements on each of these bearings, each of these rolling elements having a Yorili surface which can cooperate with one of these edges to achieve the forming of a strip to be rolled, and these allow the #, e rolling elements in opposite directions with respect to the axis of this other b'elle can be inclined, whereby when these shafts are pressed together, the shaped surface pieces of these rolling elements can exert compressive forces on a strip that is rolled in the area of these edges, and these forces have components that are both parallel and perpendicular to the axes these waves run. 12. Rolling plant, C> according to claim 11-9, characterized in that these bearings are arranged at the same distance from and on opposite sides of a plane, the same distance from these edges. 13. Vialzanlage according to claim 12, characterized in that devices are provided uni to change the distance between these camps. 14. Rolling plant according to claim 12, characterized in that this other shaft is driven and this Üager can transmit the movement of this other shaft to these rolling elements, and that each of these bearings has a first fluted part for rotation with this other vielle and a second fluted part for rotation with this rolling element, these parts having cooperating spherical surfaces, in that further means are provided for keying these parts together for simultaneous rotary movement about the axis of this other shaft, this wedge means having a groove in the spherical surface portion of one of these parts and a Recess in the spherical patch of the other of these parts and also have a ball bearing which is received in this recess for relative rotational movement and in this groove for relative rotational movement and sliding movement. 15. Rolling plant according to one of the preceding claims, characterized in that two spherical bearings arranged at a suitable spacing are mounted on a shaft of an upper roll and a pair of upper rolling elements are seated on the spherical bearings, each of the upper rolling elements at an optional angle 0 is inclined so that a component of force acts on the edge piece a on the upper roller, where a deforming force is exerted against the handle part of the lower forming roller to push the elements away from each other. 16. Rolling plant according to one of the preceding claims, characterized marked by two or more 1.Iialzstation.