US1079739A - Method of rolling flanged sections. - Google Patents

Description

H; BARBOUR. METHOD OF ROLLING FLANGED SECTIONS.

APPLICATION FILED MAR. 5, 1910.

r Patented Nov. 25,1913.

R O T N E V N s E s, s .E N n w GEORGE H. Bassoon, or PITTSBURGH, PENNSYLVANIA.

METHOD OF ROLLING FLANGED SECTIONS.

Specification of Letters Patent.

Patented Nov. 25, 1913.

7 Application filed March 5, 1910,. Serial No. 547,418. 7

To all whom, it may concern Be it known that I, GEORGE HQBARBOUR, of Pittsburgh, Allegheny county, and State of Pennsylvania, have invented a new and usefulMethod of Rolling Flanged Sections, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in whichv Figures 1, 2 and 3 are front views of portions of three-high mills for rolling flanged sections.

My invention relates 'to an improved method of rolling sections having a plurality of flanges extending from one or both ends of the web. By my improved method, I am enabled to roll sections, having a greater flange width in proportion to the thickness and at the same time retain the flanges at approxi-- mately the same angle with relation to the web throughout the entire reducingprocess. I accomplish this by first forming a starshaped blank in which the diagonal dimensions over all are not less than the diagonal over-all dimensions of the finished section. This star-shaped blank may be formed in any manner, but I prefer to shape it from'a rectangular blank and immediately form the full width of the flanges and the full height of the web.

The precise nature of my invention will be best understood by reference to the accompanying drawings, which will now be described, it being premised, however, that various changes may be made in the details of construction and general arrangement of the apparatus for carrying out my method, without departing from the spirit and scope of my invention as defined in the appended claims. 4 i

In Figs. 1 and 2 of the drawings, A, B, and C designate the rolls of a three-high mill for rolling a flanged section having oppositely extending flanges at each end of the web. A square or star-shaped billet is first passed between the rolls B and C, as indicated at a. After passing through this pass, it is turned 90 degrees and passed between rolls A and B, as indicated at a itis again turned 90 degrees and passed through the pass a between the rolls B and C, andso on through the successive passes a to a". The web is formed at an angleof 45 degrees to the axes of the rolls, one pair of alternate flanges'occupies positions at right angles to the axes-of the rolls, while the other pair of pass, apdvice versa, 7

In Fig; 3, D, E, and F designate the rolls of a threehlgh mill for finishing the I-beam. The sectlon is first passed through a passalternate flanges occupies positions parallel to the axes of the rolls; the flanges occupy mg VEl'tlCtll POSltlOIlS in one pass will occupy horizontal positions when in the next indicated at a", between rolls D and E, where one pair of alternate flanges is bent at r ght angles tothe'web and is then 'run through the pass a, between the rolls E and F, where the other pair of alternate flanges is bent at right angles to the web to form the I-beam' section. I have shown the I-beamsection as being formed in eleven.

passes in a three-high mill, but it will readily be understood by those familiar with the art that the reduction might be made in more or less passes, and that it also might be made in a two-high mill; thefnumber of passes. being arranged in accordance with the section to be roduced.

4 When rolling I- earns, such as shown at a in Fig. 3, I may start with a blank,-such as shown at a in Fig. 1, or I may form this blank by passing a blank, such as shown in,

dotted lines-at a? through the passes a, a,

and a but in all cases, I desire to form the article from a blank in which the over-all cross-sectional dimensions are as great or greater than the over-all cross-sectional .dimensions of the finished article. By an inspection of the blank shown at a in Fig. 1,

it will readily be seen that the diagonal di-v mension across the oppositely disposed projections is as great as the diagonal dimension across the roll section shown at a,

which is the last reducing pass, and that the web height of the blank shown at aP'is rolls 'B and G, as indicated at a to reduce the thickness ofthe opposite flanges and still maintain a large body of metal in the web. The blank is then put through the successive passes a, a, a and a to gradually reduce the thickness of the flanges and web. By immediately arranging the longitudinal fibers throughout the width of-the flanges and the height of the web, while there is-a large body of metal in these portions, I am enabled to properly arrange themwhile the metal is hottest and by redating the thickness of the flanges before materially reducing 'the' thickness of the web, I am enabled to form the flanges while thereis still a large body of hot metal in the web, and by then simultaneouslyreducing the thickness of the web and flanges, the fibers will be properly arranged and brought closely to their final positions in the cross section, before the critical temperature period has been reached. r

The advantages of my invention result from the provision of a method of rolling flanged shapes, in which the full width of the flanges and the height of the web are formed while there is a large body of metal in the flanges and Web, whereby the fibers are brought closely to their final position in the crosssection before the critical temperature period has been reached.

I claim: v

1. The method of shaping in a plurality of roll passes a metal section having a web and a luralit of flanges extending from one en thereofl: consisting in applying pressure to one flange and the web in the first pass to form the full width of the flange and the full height of the web, then apply-- ing pressure to the other flange and the web in the second roll pass to form the full width of said flange, and then reducing the thickness of the flanges and web in subsequent roll passes without materially changing the width of the flanges and the height of the'web; substantially as described.

2. The method of shaping in a plurality of roll passes a metal section having a web" 'of roll passes a metal section having a web and a plurality of flanges extending from each end of the Web, consisting in applying pressure to oppositely disposed flanges and the web in the first pass to form the full width of the flanges and the height of the web, then applying pressure to the other flanges and the web in a second roll pass to form the full width of the flanges, and then reducing'the thickness of the flanges and the web in subsequent roll passes without materially changing the width of the flanges and the height of the web; substantiall as described.

3. The method of forming an I-beam which consists in providing a blank having a central web and flanges extending at substantially 90 degrees with relation to each other from each end of the web, then pass ing the work piece through alternate passes to apply ressure to one flan e at each end of the web and simultaneously apply pressure to the web without materially changing the angular relation between the flanges and the web, or without materially chan ing the width of the flanges and the heigfl of the web, and then changing the angular relation between the web and the flanges so that said flanges will extend at ri ht angles to the web; substantially as escribed. In testimony whereof, I have hereunto Se my hand.

GEORGE H. BA-RBOUR.

Witnesses:

Jesse B. HELLER, H; M. Conwm.

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