US988915A - Method of and apparatus for treating metals. - Google Patents

Description

-0meala f F. L. O. WADSWORTH.

A METHOD OF AND APPARATUS FOR TREATING METALS. APPLIOATION FILED JULY 16, 1908. I 9 ,91 5-, Patented Apr. 4, 1911.

2 SHEETS-SHEET 1.

WITNESSES:

F. L. 0. WADSWORTH.

METHOD OF AND APPARATUS FOR TREATING METALS.

APPLIOATION FILED JULY 16, 1908.

Patented Apr. 4, 1911.

2 BHBETB-SHBET 2.

INVENTOR (WWII-11 WITNESSES P 4 "mm 40 tance from the axis moves at a hi her UNITED STATES PATENT OFFICE.

FRANK L. 0. WAIDSWO'RTH, OF SEWICKLEY, PENNSYLVANIA, ASSIGNOR TO MILLER NON-CORROSIVE METAL COMPANY, A CORPORATION OF PENNSYLVANIA.

METHOD OF AND APPARATUS FOR TREATING METALS.

To all whom it may concern:

. Be it known that I, FRANK- L. O. WADS- WORTH, residing at Sewickley, in the county of Allegheny and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Methods of and Apparatus for Treating Metals, of which improvement the following is a specification.

In he manufacture of metal plates it has heretofore been found ossible to mechanically effect a densification of the metal at and adjacent to their flat surfaces, by first rolling upon said surfaces closely arrangedface densification may .be accomplished, a

continuous and uniform densification will not be secured, particularlyat and adjacent to the lines of junction of the angularly re lated surfaces. Where it has been attempted to rou hen such angularly related surfaces simu taneously or in one roll-pass, the

result has lacked continuity and uniformity of'densification in individual surfaces, which h'avebeen subjected to the rou hening acsurfaces 0 tion portions of the roll or ro s lying at an angle to the axis thereof. Since the portion of such roll surface at a greater disspeedthan the portion nearer thereto, it is impossible to evenly mark the surface ofthe piece going'through. And since individual projections u on such roll surface operate upon the sur ace of the piece in a' line at an acute angle to' the-line of forward moveme fi t of the piece, the result'is often a tearing of the metal of the surface ofthe piece,

and a consequent break in the continuity of the projections formed thereon. I

It is the object of the invention, to overcome these difliculti'es, and to produce articles of irre lar shape the angularly related f which shall be uniformly and Specification of Letters Patent. Application filed July 16, 1908; Serial No. 443,913.

Patented Apr. 4, 1911.

continuously densified. To that end the new method herein described, generally stated, consists in forming the closel adjacent projections upon such angular y related surfaces of the piece by pressure applied normally to the point on each surface where each projection 1s formed, and evenly in lines transversely of each surface, in order to attain uniformity and continuity of the projections. upon each individual surface; and then by compressing and smoothing the adjacent surfaces simultaneously or in one ass, I am able to secure continuity of the ensified skin throughout all portions of the surface of the finished piece.

Inthe accompanying drawings there is illustrated a suitable ap aratus for the practice.of the said new met 0d, and which also forms a part of the present invention.

'Fi re 1 is a view in elevation of'a universa rolling-mill 'for the production of I-beams. Fig. 2 is an end elevation of the same, showing the beam blanks being rolled in passes a and d but not showing an blank in pass 6. Fig.-3 illustrates a detai of the arrangement of the auxiliary rolls for op erating u on the inner surfaces of t e flanges 0 an I-beam or other irregular shape. Fig. 4 illustrates an arrangement of auxlliar rolls for operating upon the upper and un er surfaces of the head of a rail.

Fig. 5 is a top plan view of the construction shown in Fig. 4. Fig. 6 illustrates the surface of'ja portion of a artially formed rail which has been marke in accordancewith this invention. Fig. 7 is a partial plan view illustrating the arrangement of the vertlcal rolls shown in Fig. 1. Fig. 8is a dia ammatic view illustratin the manner 0 producing the densified SklIl. Fig. 9 shows conventionally a pass between a pair of horizontal rolls arranged in advance of the rolls shown in Fi 4, and in which the edges of the head an the web of the rail are roughened.

In the practice of the invention the mill as regards the main reducing rolls 1, 1 and 1", and the housings "2, will be constructed and arranged in the usual or any suitable manner. The number of passes Wlll of course depend upon the extent of the reduction to be accomplished, "or two or more stands of rolls may be used. The surfaces a of one or more passes .in the main rolls,- (these surfaces being those which when in contact with the piece move in a direction substantially parallel with the direction of feed, and therefore apply pressure normally to the surfaces upon which they operate), are cut by indentations or grooves so as to form intersecting angular ridges closely adjacent to each other. The depressions thereby formed in the surfaces of the piece will thus have the required contiguity, so that the intervening projections or ridges will mutually bear against and support each other in the operation of rolling these projections down to a smooth surface. In this way is accomplished the densification of the metal of the flat surface of the finished article, by means of the lateral compression of.

. metal :20 of the walls adjacent thereto,an

vice versa.

In order to form the pro ections upon v the outer surfaces of the flanges of the beam,

the vertical rolls 3, 3 are provided, and for the inner surfaces of the flanges the auxiliary rolls 4, 4 which are inclined at the proper angle to apply their rolling pressure normally-to said surfaces. The said vertical rolls and inclined rolls are cut to form one vertical roll which operate upon each flange of the beam, shall .operate thereon together, the two inclined rolls and the vertical roll acting in opposition. The vertical rolls have their journals mounted in blocks 5, adjustable on rails 6 secured to the housings of the mill, and the journals 7 of the inclined rolls are mounted in the same blocks. The vertical rolls are driven by worms 8 on the shaft 9, which engage wormwheels 10 on the journals of the vertical rolls, said journals being also provided with pinions 11 intermeshing with pinions 12 on the journals of the inclined rolls.

In operation the beam-blank is fed forward through the left-hand roughing pass between the middle and lower rolls; back through pass 7) between the middle and upper rolls, forward through pass 0 between the middle and lower rolls, and back through pass 03 between the middle and upper-rolls. In a mill having the passes thus arranged, it is preferred that in each of said four passes all of the rolls, or the portions thereof which operate normally to the surfaces of the piece going through, shall be patterned in the manner described. Thus in each of said passes, the web of the beam and the edges of its flanges being marked in the main rolls, andthe inner and outer faces ofits flanges being marked in the adjacent vertical and inclined rolls, the marking is performed, during reduction, upon all portions of all surfaces of the beam at each point throughout its length, so that the markings upon adjacent angularlyrelated surfaces run up toand merge. into each' other. Thus when the beam is run through the final smooth pass or passes, as at e, a uniform densified skin will be produced, and there will be no lines or patches of undensified metal at and adjacent tothe lines of junction of adjacent surfaces. The use of smooth vertical and auxiliary rolls in connection with passe will ordinarily be unnecessary, since the projections upon all surfaces of the. piece may be compressed and smoothed by the smooth contacting surfaces of said pass 6 in the main rolls. Also by reasonof the fact that the projections are formed upon all surfaces of the piece solely by pressure applied normally to each surface, and evenly transversely of' each surface, uniformity and continuity of the projections upon each surface, and the consequent uniformity and continuity of the densified skin over all portions of each surface, are attained.

The pattern and size of the projections formed in the successive passes may be varied, in order to more thoroughly act upon the surfaces of the piece. It will also be understood that the invention is not limited with respect. tothe number of passes in which projections shall be formed. Good results can be attained by forming the projections upon the piece in one pass, and then, before smoothing, chilling the surfaces by applying thereto a cooling fluid. But where the only surface cooling effected is by contact with the rolls, it is considered better practice to subject the article to. a plurality of passes the operative portions of which are roughened as described.

In Figs. 4, 5 and 9 is shown an arrangement of rolls for forming the described projections-upon the'head and web of a rail,

pins 32, formed on the arms 33, which are p-ivotally mounted on shafts 34, having hearings in the frame 29. The arms 33 are movable to permit of the adjustment of the inclined rolls at the proper angle to the vertical roll. They may be held in position by bolts 35 passing through the frame 29 and through s otted lugs 36 on the arms 33. The inchned rolls are provided at one end with bevel pinions 37 intermeshing with corresponding bevel pinions 38 mounted on the shafts 34, and provided with worm wheels 39 driven by worms 40 on the projections and then rolling the same to substantially smooth surfaces.

2. The method of densifying a plurality of adjacent an larly related surfaces of a metallic artic e, which consists in rolling upon said surfaces, by pressure applied normally and evenly throughout the length of the bearing surfaces of the rolls, a substantially continuous series of closely ar ranged angular projections, and then rolling the same simultaneously or in one pass to substantially smooth surfaces,

3. In a mill for rolling shapes, the combination of a plurality of rolls arranged with their respective axes substantially parallel with the corresponding portions of the article upon which the rolls operate, the faces of the rolls operative upon the metal being patterned whereby the entire surfaces operated upon are roughed.

In testimony whereof, I have hereunto set my hand.

FRANK L. O. WADSWORTH.

Witnesses:

CHARLES BARNE'I'I, FRANCIS J. TOMASSON.

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