US709080A - Process of shaping metal i-beams, channel-beams, &c. - Google Patents

Description

. Patented Sept. I6, |902. W. A. DUNN. PBDCESS 0F SHAPING METAL I-B'EAMS, CHANNEL BEAM s, en.

:Application led Jan. 3, 1902.)

(No Model.)

Paened Sept. I6, |902. W. A. DUNN. PROCESS 0F SHAPING METAL |-BEAMS, CHANNEL BEAMS, 81.0.

2 Sheets-Sheet 2.

(No Model.)

lUNITED STATES PATENT OFFICE..

lVILLIAM ABERCROMBIE DUNN, OF SMITI'IlTILLE, MINNESOTA, ASIGNOR OF ONE-HALF TO ATI'IOL MORTON MILLER, OF DULUTII, MINNESOTA.

PROCESS OF SHAPING METAL I-BEAMS, C3Hf\NNEL-BEAVIS,805%..

SPECIFICATION forming part of Letters Patent No. 709,080, dated September 16,1902

Application led January 3, 1902. Serial No. 88,301. (No model.)

To all 11k/71.0771, it 71u17/ cm2/007%:

3e it known that I, WILLIAM ABERCROMBIE DUNN, a citizen of the United States, residing at Smithville, in the county of St. Louis and 5 State of Minnesota, have invented certain new and useful Improvements in Processes of Shaping Metall-Beams, Channel-Beams, the.; and I do hereby declare the following to be a full, clear, and exact description ofthe inven- .tp tion, such as will enable others skilled in the /V art to which it appertans to make and use' z5 The product. which is the result of my im-I proved process is unobtainable by existing processes, so far as I am aware. At present in the manufacture by the rolling process of I- beams, for example, the maximum width of 3o "flange obtained does not exceed seven inches, although there has existed for many years a large demand for a beam of much greater width of flange, which has necessitated the.

furnishing of beams built up from plates and angle-bars riveted or otherwise secured together. Rolled beams of the type referred t0 are-universally made from an ingot or slab of approximately rectangular form in crossseetion, and in the processes at presentern--, 4o ployed the flanges are formed by a rolling" 'pressure exerted against` the top and bottom andehds of the ingot in vertical and horizontal directions. The rolls are provided I with flange-grooves intowhich the metal is pressed; but by reason of the direction of pressure exerted it is im practicable to force the metal to such an extent as will form a ange exceeding seven inches in width. In the processes at present employed there is ex- 5o perienced the further difficulty of controlling' the shape of the flange during the first passes` 'nel-beams by my process.

.double pair of vertical rolls 2 2.

of the bla'nk `through the,roll swhich frcquently results inan unequal distribution of the metal to form thejlanges, progyll! 2l imperfect product of impaired str gth.

My improved process is designed to overcome the various objections to and obstacles present in existing processesand, motreover, to reduce the expense of operating andina.. crease the capacity of roller-mills'and at the 6o same time toproduce a very desirable prod uct hitherto unobtainable by a roller process. My improved process is set forth in detail in the following description, and vin'connection willi suchdescription attention is called to the accompanying drawings, illustrative of a means by which my process may be carried into effect. In the'drawings, Figure l is an elevation of a lset ol' shaping-rolls for forming I-beams t7o by my process. Fig. 2 is an enlarged crosssectional view of the ingot or slab.`I prefer to employ. Fig. 3 is an elevation of a shaping V. mill, showing a set of rolls for forming chan- Fig. 4 is a view 75 similar to Fig. 3, showing the shape of the metal after repeated passes. Fig. 5 is an en larged sectional view ot' the ingot or slab I prefer to employ in making channel-beams.

Referring to the drawings by numerals, 1 8o designates the frame of the machine, in which is mountedv a pair of horizontal shaping-rolls and in advance thereof either a single or a In Fig. l, which illustrates a machine adapted to shape an ingot or slab. for I-beams, the horizontal rolls 3 are of similar form, beine,` eaehprovided with a central portion 4 the periphery or rolling-surface of which tapers slightly at each side of the centerand -with grooves Iianlt-l `9c. ing thecentral portiop and each formed of au inc lined wall 5, a narrow base 6, and a sharplyinclined opposite wall 7, extending to the sn r- 'face of the central portion 4.

The ingot or slab which I prefer to employ is illustrated in cross-section in Fig. 2 and is designated bythe numeral 8. In' practice this ingot or -slab is passed between the vertical rolls 2 2 and thence between the horizontalrolls 3 3, by which it is subjected to roo pressure exerted in avertical direction by the portions 4,4 of the rolls and also to pressure augment the width of the flanges and reduce the height ofgh'ebeam. ltwilllbe understood that the metal is repeatedlypassed between the vertical rolls Aand the horizontal rolls alternately and that each pass is preceded hy au adjustment .of the rollsto reduce it cross-sectionally to the proper size and i rolls is'subjected not only to pressures ex erted in vertical and horizontal directions, v

r cess of that heretofore obtainable, this be.

shape. It will'be noted that vthe metal in;` passing between thevertical'and horizonta but also to a pressure exerted at the,four edges of the metal in adirection at an angle to the vertical and 4toward the center of the metal. This last-stated pressure greatly facilitates the formation of the langes,` reducing the number of passes of the metal from ap' proximately twenty-eight under the present practiced processes to approximately nine, or, in other words, reducing such number twothirds. Aside from the fact that owing to this large reduction in the number of passes a great saving in the operating expenses results and the capacity is largely increased my improved process enables the formation of a beam havinga width of flange largely in exing due totheaeadinesswith which the metal enters the Hangs-grooves when acted upon by the pressures exerted' against it. Again,

in practicing my process the shaping of the metal is at all times under complete control throughout the entire body. This feature" is important when it is considered that in the finished product the flanges must be uniform in size and strenfrth and that to produce aperfect beam the distribution of the metal to form the flanges must be equal. In the pres-v en't practiced processes the'shaping of the entire body of metal is not at all times under control, andthe result is, as above stated, an imperfect and weak product.

My process may, as illustrated in Figs. 3 l

and 4, be employed with equal advantage'in theimauufactureof channel-beams. For this purpose I prefer to employ the special form.

of ingot or slab illustrated in Fig. 5 and designatedby the numeral 9.' The lower roll 10 .of the machine may be substantially similar to the rolls 4 employed in the shaping of I-beams, but the companion roll 1l is of different form, being provided with a central cylindrical portion 12, flanking beveled por- 'tions 13 13, and outer portions 1414 of slightly less bevel than the intermediate portions 18 13.

The operation of the rolls 1012 is similar to that of the I-beam rolls before described.

Aided by the vertical rolls 2 2 the metal is pressed .by a'comparatively few number of passes to the form shown in Fig. 4, from which, as will be understood, it is conveyed 'to intermediate and finishing rolls for the desi'red reduction in cross-sectional area and the proper form for the final product.

My process while designed more particularly for the manufacture of beams having comparatively wide Hanges is also adapted for the making of standard sizes of beams. When employed for this last-named purpose, a great saving in the cost of production is effected, owing to the rapidity with which the flanges are formed and to the consequent `reduction in the number of, passes required.

I claim as my invention- The herein-described process of making flanged'beams from metal ingots or slabs, which consists in subjecting the ingot or slab intermediate of its sides to roller-pressures exerted in a vertical direction, subjecting the sides of the ingot or slab to pressures exerted in a horizontal direction, and simultaneously with `the vertical pressures applying rollerpressures to the side edges of the ingot or slab in an inwarddirection and at an abrupt angle to the horizontal.

In testimony whereof I affix my signature in'presence of two witnesses.

WlLLIAliI'ABERCROlllBIE DUNN.

Witnesses:

W. I. NORTON, F. L. BROWNE.'

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