Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
  • B21B39/14—Guiding, positioning or aligning work
  • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
  • B21B39/165—Guides or guide rollers for rods, bars, rounds, tubes ; Aligning guides

Definitions

• This invention relates to roller guides for rolling mills in accordance with the preambles of claims 1, 10 and 14 respective- ly.
• Roller guides having double pairs of guide rollers for guiding the material being rolled into rolls of a rolling mill are known in various designs.
• the reason for using double pairs of guide rollers is that they guide the material more efficiently and at the same time produce a straightening effect giving a better rolled material. This primarily applies to loop-regulated rolling mills but also to intermediate and medium section rolling mills where mechanized or hand rolling procedures are applied.
• roller guide It is important that the positions of the guide rollers in rela ⁇ tion to the material being rolled may be easily adjusted in parallel, and at the same time the roller guide should not require much space laterally. If the roller guide is broad this will effect the possibility to roll near the end of the roll barrels and also leads to a lower ratio of production to capacity and thereby to higher costs. In rolling mills where the rolls are arranged on a free neck the bending moment on the roll shafts will increase the further away from the roller chock they are arranged. Due to these circumstances broad roller guides are not used for instance in wire rod blocks.
• the guide rollers should be easily acces ⁇ sible for exchange and their bearings should be designed so that manufacturing, installation and journalling provides advantages.
• Universal fastening means for entry guides to the guide rollers, or entry funnels to special primary guides provided before the guide rollers, should be provided in the entry part of the roller guide. These fastening means should also be possible to utilize for devices intended for fastening guide pipes and guide channels and adjusting instruments being used in rolling mills.
• a first object of the invention is to provide a roller guide of the kind indicated in the introduction, which permits that the guide rollers, when being centrally adjusted, follow the material being rolled uniformly and in parallel, and which at the same time makes it possible to design the roller guide comparatively narro .
• a second object of the invention is to provide a roller guide of the kind indicated in the introduction, which brings about advan- tages relating to the processing of the roller guides during their manufacturing, as well as regarding an easy and quick exchange of worn guide rollers and finally also regarding the interval between exchanging the roller guide itself.
• a third object of the invention is to provide a roller guide of the kind indicated in the introduction, which provides for a possibility of rolling at very high speed in for instance wire rod blocks and which also provides for a longer interval between the exchange of guide rollers and/or roller guides.
• Fig. 1 in a plan view from above illustrates the basic principle of the roller guide according to the invention
• Fig. 2 shows a view from the adjustment end of the roller guide according to Fig. 1, partly in section and with portions of the roller guide omitted,
• Fig. 3 is a plan view from the side, of the roller guide according to Fig. 1, partly in section and with portions thereof omitted,
• Fig. 4 shows a section through an alternative embodiment of the cam disc equipped with cup springs
• Fig. 5 shows a somewhat modified embodiment, in a plan view from the side, of the roller guide according to Fig. 1,
• Fig. 6 shows a plan view from above of the roller guide according to Fig. 5
• Figs. 7 and 8 show an angle shelf for fastening guide pipes in the entry part of the roller guide, from the side and from above respectively
• Fig. 9 shows, in section, an alternative embodiment of the bearing for a guide roller in a first roller holder of a roller guide
• Fig. 10 shows, in section, a further embodiment of a bearing for a guide roller in a first roller holder of a roller guide
• Fig. 11 shows, in section, an alternative embodiment of a bearing for a guide roller in a second roller holder of a roller guide and a turning centre for the bearing of a first roller holder in a second roller holder,
• Fig. 12 shows a modified embodiment of the bearing illu- strated in Fig. 11,
• Fig. 13 shows, in section, an alternative embodiment of the cam disc according to Fig. 4,
• Fig. 14 shows a section through the bearing for a second roller holder in a guide housing
• Fig. 15 shows a section through that end of the first and second roller holders positioned closest to the rolls on one side of the rolling pass line, with all of the guide rollers mounted in double be ⁇ arings,
• Fig. 16 shows, in section, another alternative embodiment with a turnable key replacing the cam disc accor ⁇ ding to Figs. 1-4 and 13, and Fig. 17 shows, in section and from above, the alternative embodiment with a turnable key according to Fig. 16.
• Figs. 1, 2 and 3 illustrate, schematically and drawn in exaggera ⁇ ted perspective, the basic principle of the roller guide accor ⁇ ding to the invention, and specifically illustrate the principle for adjusting the guide rollers 1, 3 and 2, 4 respectively mounted in the first 5, 7 and second 6, 8 roller holders, whereby said figures only show the parts of the roller guide which are essential for the adjustment of the guide rollers 1-4.
• the first roller holders 5, 7 are, on each side of the rolling pass line 14, articulately mounted in the second roller holders 6, 8, in the turning centres 10, 11 coinciding with the bearing centres of the guide rollers 2, 4 in the second roller holders 6, 8.
• the corresponding guide rollers 1, 3 are mounted in a first end of the first roller holders 5, 7 located closest to the rolls, not shown.
• a second end of the first roller holders 5, 7 engage an adjusting device in the shape of a cam disc 9 with adjusting screws 15 and 17 respectively.
• the cam disc 9 is mounted for rotation on a shaft 13 extended perpendicularly to the rolling pass line 14 and is provided with end surfaces centered relative to the shaft 13, on each side of the rolling pass line 14.
• the adjusting screws 15, 17 of the first roller holders 5, 7 abut the corresponding end surfaces on the same side of the shaft 13 of the cam disc 9.
• the end surfaces of the cam disc 9 are inclined with the same angle, but in opposite direction in relation to a plane perpen ⁇ dicular to the shaft 13.
• the second roller holders 6, 8 are likewise provided with a first end, located closest to the rolls, in which their guide rollers 2, 4 are mounted, and a second end which through adjusting screws 16, 18 abut the respective end surface of the cam disc 9, on the same side of the shaft 13.
• the second roller holders 6, 8 are pivotally mounted in a guide housing 12, only partially illustrated, by means of shafts 19 and 20 fixed in the guide housing 12 by means of screw bushings 34 and 35.
• the cam disc 9 is also mounted in the guide housing 12 with its shaft 13, in such a manner that it is actually fixed therein.
• Fig. 4 illustrates an alternative embodiment of the cam disc 9 mounted on the shaft 13 in the guide housing 12.
• the cam disc is divided in two parts between which cup springs 27 are arranged. These cup springs are not essential but to a certain extent they will reduce the impact force which may occur.
• steel balls 26 are provided between the adjusting screws 15-18 of the roller holders 5-8 and the cam disc 9.
• the adjusting screws may also by this embodiment directly abut the cam disc, but the illustrated steel balls 26 provide more distinct contact points between the adjusting screws and the cam disc and should therefore be employed.
• the steel balls 26 are guided in bores in the guide housing 12, and more specifically with such a fit that the cam disc 9 may be enclosed in a space in the guide housing 12 sealed by means thereof and filled with grease.
• the cam disc 9 may naturally be arranged such that it is rotated by the shaft 13, but preferably the rotation is caused by a pinion 28 (Fig. 5), whereby the cam disc at its outer circumference is provided with external teeth, as is indi ⁇ cated in Fig. 4.
• Fig. 13 illustrates a further alternative embodiment of the cam disc 9' where this is positioned between two washers which form the end surfaces of the cam disc 9' and on which pins 26' are arranged.
• the adjusting screws 15-18 in turn contact said pins 26' .
• this latter arrange ⁇ ment avoids point or spot friction between the steel balls and the cam disc, which is an advantage.
• the turnable key 9" is mounted for rotation on a shaft 13 extended perpendicular to the rolling pass line 14, said rotation being restricted and adjustable by means of an adjusting device consisting of a set screw 63 and a spring 64.
• 9" is in its portion closest to the periphery, and in planes perpendicular to the shaft 13, provided with planar key surfaces A and B.
• the first roller holders 5, 7 (not shown) abut the key surfaces B of the turnable key through intermediate pieces 26" and not shown adjusting screws 15, 17, on the same side of the shaft 13 of the turnable key 9".
• the second roller holders 6, 8 (not shown) do in the same manner abut the key surfaces A through their, likewise not shown, adjus ⁇ ting screws 16, 18 and intermediate pieces 26", on the same side of the shaft 13 of the turnable key 9".
• the key surfaces A and B are uniformly arranged in planes perpen ⁇ dicular to the shaft 13 of the turnable key 9".
• the key surfaces B are inclined at an angle to the rolling pass line 14, in a direction towards the roller guide entry end for not illustrated rolled material.
• the key surfaces A are inclined at an angle to the rolling pass line 14, in a direction towards not illustrated rolls.
• the intermediate pieces 26" abut the key surfaces A and B at an angle chosen such that when impact forces occur, as is the case when the material being rolled enters the guide rollers, the turnable key 9" is pressed against the spring 64 in order to reduce the effect of the impact. At this moment the guide rollers will move slightly apart.
• a set screw 63 which, when turned, actuates the turnable key 9". Due to the fact that the spring 64 being provided in the guide housing 12 pushes the turnable key 9" in the opposite direction a controlled setting of the guide rollers may be achieved.
• the surfaces of the intermediate pieces 26" contacting the key surfaces A and B are wedge-shaped and may be rotated in order to follow the key surfaces during adjustment and when impact forces occur.
• the intermediate pieces may also be provided with movable hemispheres in the contact surface, in accordance with a know design.
• Fig. 17 shows the same parts as Fig. 16, but in a view from above.
• the key surfaces A which are diametrically arranged rela ⁇ tive to the key surfaces B, are not illustrated in this figure.
• the turnable key 9" is actually guided in the guide housing 12, on its shaft 13.
• Fig. 5 illustrates the roller guide from the side and Fig. 6 illustrates the same from above, whereby the guide housing 12 is more clearly shown in these figures.
• the cam disc 9 is here illustrated enclosed together with the pinion 28 which through its shaft 45 may be rotated by means of a wrench of the like, from outside the guide housing 12.
• a graduated scale 46 indicates the size of the adjustment or repositioning.
• the entry part of the roller guide is provided with two carriers 29 and 30 with mounting holes 31 and 32.
• the carriers 29, 30 and the mounting holes 31, 32 are preferably positioned perpendi ⁇ cularly to the rolling pass line 14 and are intended to act as rigid supports for entry guides 47 which guide the material to the guide rollers 2, 4 or for an entry guide funnel 33 of a separate primary guide arranged between the entry guide funnel 33 and the guide rollers 2, 4.
• the primary guide may be arranged in a known manner inside the roller guide.
• a separate angle shelf 49 is provided, which is illustrated in Figs. 7 and 8 and which may be attached to the carriers 29, 30.
• Screws or cylindri ⁇ cal pins with locking means are preferably used as fastening means in the mounting holes 31, 32.
• the carriers 29 and 30 with their fastening means in the mounting holes 31 and 32 may also be used during adjustment of the roller guide, by connecting adjusting instruments.
• roller holders 5, 6 and 7, 8 respectively with the adjusting screws 15, 16, 17, 18 and steel balls 26 or washers with pins 26' against the cam disc 9 and 9' respectively.
• springs are provided which are not illustrated in the drawings.
• Fig. 14 shows a section through the bearing for the second roller holders 6, 8 in the guide housing 12.
• the second roller holders
• each second roller holder 6, 8 rests on cup springs 61, 62 arranged in the corresponding lower screw bushings 34, 35.
• the upper screw bushing 34 * , 35' of each second roller holder 6, 8 is preferably provided with external teeth engaging a rotatable gear or pinion 60.
• this pinion 60 may adjust the level of the roller holders 5-8 on both sides of the rolling pass line 14 in parallel. In case an individual adjustment of the levels of the roller holders is required the pinion 60 is disconnected.
• the adjustment of the mutual level for the first and second roller holders 5, 6 and 7, 8 respectively, is carried out by screws, not shown, provided in the first roller holders 5, 7 and pressing against the second roller holders 6 and 8 respectively.
• the adjustment is performed against cup springs 56 in accordance with Figs. 11, 12 and 15.
• FIG. 9 A second aspect of the invention is illustrated in Fig. 9 where the guide rollers 1, 3 of the first roller holders 5, 7 are illustrated mounted in separate end pieces 36, 37 which are secured to the first ends of the first roller holders 5, 7 by means of screws 38, 39. Normally two screws are required for each end piece.
• the guide roller 1 and 3 respectively rotates with its shaft 40 in bearings 41.
• the end pieces 36, 37 should be guided in height and laterally by guides of which only those are illustrated in the drawing, which guide the end pieces 36, 37 axially with regard to the guide rollers 1, 3.
• spacers 42 are provided between the bearings 41 and the guide rollers 1, 3 and spacers 43 are provided between the roller holder 5, 7 and the end pieces 36, 37, in connection to the above-mentioned guides.
• the bores for the screws 38, 39 in the end pieces 36, 37 should be clearance holes, in other words they should permit adjustment of the end pieces 36, 37 axially with respect to the guide rollers 1, 3.
• Fig. 10 illustrates an alternative embodiment of the journalling of the guide rollers 1, 3 in the end pieces 36, 37, whereby Fig. 10 corresponds to Fig. 9 except for the fact that in this case the shafts 40 are radially guided in the end pieces 36, 37 and are attached thereto by means of pins 48 or the like, whereby the guide rollers 1, 3 are rotatably mounted on the fixed shafts 40 through bearings 41 which may be of a standard design and which are mounted therein.
• the bearings 41 should be supported in the bearing seats by cup springs 44, in a manner known per se.
• the end pieces 36, 37 may be manufactured from the same material as the roller holders, but they may preferably also be manu- factured from another material, such as cast iron, in order to further lower the costs. Naturally it is also possible to use end pieces in roller guides having only one pair of rollers.
• Fig. 11 essentially illustrates the configuration of the turning or pivot centres 10, 11 for the first roller holders 5, 7 in the second roller holders 6, 8, with these pivot centres 10, 11 co ⁇ inciding with the bearing centres for the guide rollers 2, 4 of the second roller holders 6, 8. Said figure also illustrates the journalling of the guide rollers 2, 4 of the second roller holders 6, 8, which substantially corresponds to the journalling of the guide rollers 1, 3 of the first roller holders 5, 7, in accordance with Fig. 9, with the shafts 51 of the guide rollers 2, 4 journalled in bearings 50.
• the figure also illustrates bearing pivots 52, 53 which form the pivot centres 10, 11 of the first roller holders 5, 7 and which are mounted in the first roller holders 5, 7 by means of threads. Moreover, the figure illustrates spacers 55 corresponding to the spacers 42 in Fig. 9, and a spacer 56 which, as mentioned above, permits adjustment of the mutual height or level of the roller holders.
• an end journal 54 is provided, which is attached thereto by means of threads and which is removed when the shaft 55 is to be dismounted, whereby the dismounting is carried out by means of a dismounting pin which is inserted through a bore 57 of the first roller holder 5, 7 and a corresponding bore in the other bearing pivot 53.
• Fig. 12 essentially shows the same parts as Fig. 11, but illu ⁇ strates a third aspect of the invention, according to which the guide rollers 2, 4 are journalled by means of double bearings 50, 57, 58.
• the guide rollers 2, 4 are rotatably jour- nailed on shafts 51 by means of first bearings 50 mounted there ⁇ in.
• the shafts 51 are in turn journalled in second bearings 57, 58 provided in the roller holders 6, 8.
• the result of this is that the shaft 51 together with the inner rings of the bearings 50 in theory may rotate with its rotation speed reduced to half.
• the second bearings 57, 58 may be replaced by fixed rings, where ⁇ by the shaft 51 may be fixed between the end journal 54 and the bearing pivot 53. It is obvious that all guide rollers 1-4 in the roller guide may be journalled by means of such double roller bearings.
• cup springs 44 according to Fig. 10 may be replaced by corre ⁇ sponding cup springs (not shown) arranged between the roller bearings 57, 58 and the end pieces 36, 37 or the roller holders 6, 8.
• corre ⁇ sponding cup springs (not shown) arranged between the roller bearings 57, 58 and the end pieces 36, 37 or the roller holders 6, 8.
• this kind of bearing arrangement with double bearings is definitely advan- tageous since the roller bearings in principle only rotate with half the speed of the guide rollers.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Rolls And Other Rotary Bodies (AREA)
• Metal Rolling (AREA)

Applications Claiming Priority (2)

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Family

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Family Applications (1)

Country Status (3)

Cited By (1)

Citations (3)

• 1991
  • 1991-04-04 SE SE9100996A patent/SE468883B/sv not_active IP Right Cessation
• 1992
  • 1992-04-02 AU AU14598/92A patent/AU1459892A/en not_active Abandoned
  • 1992-04-02 WO PCT/SE1992/000211 patent/WO1992017290A1/en active Application Filing

Patent Citations (3)

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