US1603202A - Rolling-mill apparatus - Google Patents

Description

Oct. 12 1926. v 1,603,202 J. R. GEORGE ET AL v ROLLING MILL APPARATUS Filed Oct. 22 I 1925 Jfioarzivrs;

Jrome l? Geog-9e .75/1/2 I? .J/zeperdJO/Z Patented Oct. 12, 19 26.

Niran STATES PAT F ice.

JEROME R. GEORGE, JOHN W. SHEPERDSON, AN'D ARVIID T. BLOOM, OF \VORC'ESTIER, MASSACHUSETTS, ASSIGNORS TO MORGAN CONSTRUCTION COMPANY, OF WORCES- TER, EASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

ROLLING-MILL ArPaRA'rUs;

Application filed October 22, 1925. Serial No. 64,173.

The presentinvention relates generally to rolling mills. The invention resides in a novel disposition and arrangement of rolling mill apparatus, especially applicableto a general-purpose or jobbing mill, which is adapted to the rolling of a large variety of different sizes and sections.

The features and advantagesof the invention arefully set forth in the following description, reference being had to the ac- 'companying drawing, in which the single figure is a diagrammatic plan view of rolling mill apparatus arranged in accordance with the invention.

Referring to said drawing, the preliminary reduction of the stock as received from a heating furnace, not shown, is preferably effected in a continuous roughing mill, here shownas constituted by two groups or trains of rolls, the first group, for example, comprising't'our stands of rolls 1, 2, 3 and 4, and thesecond group, for example,-comprising the stands of rolls 5, 6, 7 and 8. Obviously, the number of stands of 'rolls in these roughing trains may be varied at will without dcparting frpm the spirit and scope. of the present invention; the latter, as herein-after set forth, being concerned not with said trains of roughing rolls per se, but with the particular arrangements and combina tions that involve also the intermediate roll tralilns and the finishing roll trains of the m1 The continuously arranged roughing stands 1, 2, 3 and 4 are preferably driven each from an independent'source of power, as for instance, an adjustable speed electric motor 20, having interposed reduction earing 21 to obtain the low speeds require for said rolls. The second train of roughing rolls, constituted by the continuously arranged stands 5, 6, 7 and 8, are driven from another independent'source of power, name- 1y, as here shown, a separate and. distinct adjustable speed electric motor 22. In ageneralurpose or jobbing mill, the several stan s ofsroughing rolls 1 to 8 inclusive, arranged for continuous operation, are each preferably provided with a plurality of independent rows of differently shaped passes, to give such variety as may be desired inthe cross section of the, reduced material emerging from the roughing mill. Said material as thus brought into condition for further f'ai'n-ication by rolling may be handled. in intermediate and finishing roll trains, in a variety of ways, as will now be described in detail.

for the driving of the second roughing train,

the rolls 9 and 11 operating in the reverse direction from said roughing train and the rolls 10 in the same direction as said roughing train. The gearing for the rolls 9, 10 and 11 is arranged, as shown, to rotate them at progressively increasing speeds, thus to compensate for the elongation of the stock, due to its passage through said rolls.

The introduction of the stock to the. first stand of rolls 9 of the intermediate looping train may be accomplishedin two different ways. As shown, a Y-transfer conveying mechanism 23 of well known construction is disposed in position to receive the stock from the roughing mill, and this mechanism provides the usual means, in the form of skewed conveyor rolls 24, 24:, for effecting the travel of each piece as received thereon in. the opposite direction, so as to present the rear end of said piece to the pass of the rolls 9.

Or, if desired, a mill operator, appropriately stationed, may seize the front end of each piece emerging from the rolling mill and enter it between the rolls 9, the stock in this instance forming a loop, as shown at 2'5. Vvhichever the method .of introduction employed, the stock as it leaves the rolls 9 of the intermediate mill is susceptible of a variety of selective different dispositions, to meet the varying requirements that arise in a general-purpose or jobbing mill.

For example, an operator, appropriately stationed, may seize the first end of the stock emerging from the rolls 9 and enter itbetween the rolls 10, the stock, under these conditions, forming a loop, as shown at 26; then, after passage of the stock through the rolls 10, its'first end may be seized and entered stance forming a loop, as shown at 27.

between the rolls 11, the stock in this i61- r if desired, the stock as it leaves therolls 9 may be diverted from any further interme diate reduction, by being entered by an. operator between a pair of rolls 12, the stock in this instance forming a loop, as shown at 28. Furthermore, said rolls l2 in addition to receiving the stock direct from the rolls 9 of the intermediate train may likewise receive the stock from the rolls ll of said intermediate train, the stock in this lastnamed instance forming a loop, as shown at 29.

The rolls 12 constitute, in the present arrangement, a part of the finishing mill which is made up additionally of the alined stands of rolls 13, 14 and 15, all of said finishing stands of rolls being here shown as driven from a third independent source of power, for example, a variable speed electric motor 30, from which a belt drive asindicated at 31, is taken to each of said finishing stands. Any one of the stands of rolls 1'2, 13, 14 or 15 is selectively available for finishing the stock, in advance of its projection onto a suitable runout, not shown, for delivery to a cooling bed or other receiving device, not shown. For instance, if the mill is operating for the production of large rods or bars, these will be finished in the 'stand of rolls 12, the three succeeding stands of rolls 13, 14 and 15 being temporarily removed or rendered inoperative so as to make the stand 12 the final stand of the mill. On the other hand, if the mill is operating for the production of small wire rods, these are finished in the stands of rolls 12, 13 and 14,the

stand 15 alone being the only one removed or rendered inoperative. Again, if the mill is operating for the production of strip material, such material may be finished either in the stand 12, or the stand 13,01 the stand 15; if finished in stand. 13, the space between,

stands 12 and 13 is sufiicient for the formation of a loop,'as shown at 32, and if finished in stand 15, the removal of stand 14 gives suflicient space between stands 13 and 15 for the formation of a loop, as shown at 33. Thus there is no' obstacle, either in the non-continuous intermediate mill, nor in the normal continuous finishing mill, to the formation of free loops in the material being rolled, nor any handicap to the flexibility and capacity for selective operation which characterize the arrangement as an entirety.

I, It is to be noted that the apparatus as above described possesses many of the advantages of a specialty mill, for the rolling of a relatively limited number of different sections, while at the same time eliminating the limitations on flexibility and other disadvantages that such a mill must usually work under. Furthermore, as a general-purpose or jobbing mill, the invention makes possible the selective rolling of a large variety of different sizes and sections with a minimum number of changes required in the apparatus to adapt it to the rolling of the various products required.

We claim, 1 1. In apparatus of the class described, the combination with continuous roughing and finishing mills, of a non-continuous intermediate mill, wherein the speed ratio of each stand of rolls to every other stand-in said intermediate mill is other than unity.

2. Inapparatus of the class described the combination with a continuous roughing mill, of a non-continuous intermediate mill, wherein the speed ratio of each stand ofrolls to every other stand is other than unity, and a succeeding plurality of alined stands of rolls in any one of which the product rolled by said roughing and intermediate mills may be finished. v

3. 1n apparatus of the class described, the combination with a continuous roughing mill, of a non-continuous intermediate mill, and a continuous finishing mill, the latter providing a plurality of alined stands of rolls, each selectively available to provide the final pass for the material being rolled, and further providing for the formation of free loops in saidv material bet-ween said stands.

4. In apparatus of the class described, the combination with continuous roughing and finishing trains of rolls, ofian intermediate looping train, consisting of a plurality of stands of rolls each driven at successively higher speeds than the one precedin 5. In apparatus of the class desori d, the

combination with a continuous roughing mill providin two separated groups of roll stands, with separate driving means for each group, of a non-continuous intermediate m-ill having the same driving means as the second group of roughing rolls and providing a plurality of stands of rolls each driven at a igher speed than its predecessor, and a continuous separately driven finishing mill providing a lurality of alined stands of rolls, each seectively available to serve as the final pass for the material being rolled,

said stands of finishing rolls being spaced apart for the formation of free loops in said material between'said stands, when desired.

JEROME 'R. GEORGE. JOHN W. SHEPERDSON. ARVID v T. BLOOM,

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