US2099473A - Rolling mill guide - Google Patents

Description

Nov. 16, 1937. s. FINDLATER ROLLING MILL GUIDE 4 Filed se t. 24, 1936 5 Sheet s-Sheet 1 79w M57? ZifiTEVENSO/V fimaLnrs/e,

Nov. 16, 1937. s. FINDLATER 2,099,473

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Nov. 16, 1937. s. FINDLATER 2 1 37 ROLLING MILL. GUIDE Filed Sept. 24, 1956 3 Sheet-Sheet 3 llllllllll l! Patented Nov. 16, 1937 UNITED STATES 2,099,473 ROLLING MILL GUIDE Stevenson Findlater, McKeespoi-t, Pa., minor to National Tube Company, a corporation of New Jersey Application September 24, 1936, Serial No. 102,411

6 Claims.

This invention relates to rolling mill guides and more particularly to guides for metal workpieces, such as bars, shells, pipes, tubes, blooms or billets, that are entering or leaving a rolling mill.

In the art of rolling metals, a great deal of diflicultyhas been experienced in guiding the various sized work-pieces. This has necessitated providing a large stock of different sized guides which not only is quite expensive but takes up a large amount of floor space in the mill. In addition, a great loss of time and labor has been involved in changing the guides to accommodate the section being rolled. Further, it has beenparticularly diflicult to provide suitable guides for reversing mills employing a plurality of passes".

It is accordingly among the objects of my invention to provide an eflicient rolling-mill guide which is readily adjustable to accommodate. sections that vary over a wide range-of dimensions. and one which is, at the same time, well adapted for use on mills of existing design.

Another object is the provision of a device of the class described which is inexpensive to install 11; and maintain.

The foregoing and other objects will be apparent after referring to the drawings. i which:

Figure 1 is a plan of the device of the invention. Figure 2 is a side elevation. Figure 3 is an enlarged end elevation.

I Figure 4 is an enlarged sectional view on the line IV-'-IV of Figure 3.

Figure 5 is a plan of a modified form ofthe device of the invention.

Figure 6 is an end elevation, partly in section.

Figure 7 is a sectional view on the line VII-VII of Figure 6.

. A preferred embodiment of my universal guide consists of a train of two-high guide roll units, each unit consisting of a top roll 3 and a bottom roll 4 having a plurality of complementary tapering grooves X aroundtheir peripheries, the train being disposed at either the entrance and/or the exit side' of a rolling mill Ac The rolls 3 and l are mounted in bearings 5 which are mounted on suitable side-1rame members 6 and 3'}. The shaft 1 of each of the rolls 3 and l carries a keyed gear 8 which meshes with an individual wormgear 9, the latter being secured to a shaft ii that is rotatably mounted in bearings ii, on the side-frame members 3 and This shaft I3 is driven by a conveniently disposed motor 1 3 through a reduction gear I and flexible couplings l5.

According to the preferred embodiment, which duction unit ll, whereupon the gears 8 and 9 readily lends itself to the tubular arts, the grooves are half-round, but they may, of course, be of other shape, such as square, rectangular, oblong, oval, etc. The axes of the grooves X are in a vertical plane, perpendicular to the longitudinal axis of the rolls 3 and 4 so that the center line of the groove will not change as the roll is rotated. v I

The top and bottom rolls 3 and 4 are posi- -'tioned so'that the half-round grooves X form between them a round groove to guide the work- .piece, the rolls being positioned so that the grooves are of the same size in each complementary pair of the train. The rolls 3 and 4 are so disposed that the center line of their respective grooves is in the same plane as the center line of the pass of the rolling-mill, which, as previously mentioned, is indicated at A. The number of grooves Xin the rolls 3 and 4 should bethe same as the number of working passes B in the rolling mill A, each being in line therewith. The length of the train of rolls 3 and l and their numberv are such that guiding area is provided at suitable intervals throughout the length of the work-piece. I

In operation, when the sizeof the work-piece being processed on the mill is changed, the motor i3 is energized which acts to rotate the shaft Ill through the flexible couplings l5, and gear reare synchronously rotated topartially rotate in like manner the rolls 3' and 4. The amount of partial rotation of the rolls 3 and 4 is determined by the size of the groove desired. Thus, all of the rolls will be turned the same part of a revolution and the size of their respective grooves will be changed the same amount.

Referring to Figures 5, 6 and 'l of the drawings, a modified form of the invention is shown as comprising a pair of peripherally grooved rolls 3 which are transversely movable into alignment with any of the passesof the rolling-mill A. The rolls 3 of Figures 5,8 and 'l are provided with single tapering grooves X in lieu of the plurality of grooves in the rolls 3 of Figures 1 through 43 45 and are rotated in the same manner as the latter. v 1

According to this modification the -shafts 13 which carry this pair of rolls 3 are in section while the rolls are provided with correspondingly shaped central apertures 23. These rolls 3] are provided with lateral extensions 2| which carryenlarged boss portions 22. A yoke 23 is provided for connecting these boss'protions 22. A

shaft is connected to the yoke 23 and extends through the side-frame member 8*. The extended end of this shaft 24 is threaded, as shown at 26. An extension 21 is carried by the sideframe member 6 and has an aperture through which the threaded end 26 of the shaft 24 extends.

The extension 21 on the side-frame member 6 carries a nut 29 which is in threaded engagement with the threaded end 25 of the shaft 2. 'This nut 29 carries a worm gear 30. A suitably driven shaft 3| is disposed beneath the worm gear 3|! and carries a worm 32 which meshes therewith. From the foregoing it will be seen that the rotation of the shaft 3| will adjust the rolls 3 into and out of any lateral position.

While I have shown and described several specific embodiments of my invention, it will be understood that I do not wish to be limited exactly thereto, since various modifications may be made without departing from the scope of my invention, as defined by the following claims.

I claim: 3

1. A rolling mill guide comprising a plurality of pairs of rotatable complementary guide-forming rolls, each of said rolls having a plurality of grooves of gradually increasing diameter around its periphery, whereby a plurality of series of guide passes of variable size are formed between said rolls, and means for synchronously rotating said rolls.

-2. A rolling mill guide comprising a pair of rotatable complementary guideforming rolls, each of said rolls having a groove of gradually increasing diameter I around its periphery, and means for moving said rolls axially.

having a groove of gradually increasing diameter around its'periphery, means for synchronously rotating, said rolls, and means for moving said rolls axially. V

5. In combination with a rolling mill, a stationary guide device constructed and arranged to present a guiding surface to a work-piece during the movement of the latter; said guide device comprising a pair of rotatable complementary guide-forming rolls, each of said rolls having a groove of gradually increasing diameter around its periphery.

v 6. A rolling mill guide, comprising a plurality of pairs of rotatable complementary guide-forming rolls, each of said rolls-having a plurality oi. grooves of gradually increasing diameter around its periphery whereby a plurality of series of guide passes of variable size are formed between said rolls.

STEVENSON FINDLATER.

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