US1584378A - Process of rolling angles - Google Patents

Description

May 11 ,1926, 1,584,378

W. L. JONES PROCESS OF ROLLING ANGLES Filed Sept. 8. 1923 2 Sheets-Sheet 1 W Lax/mar Jones.

W atto'zwury Patented May 11, 1926. 1

UNITED STATES PATENT OFFICE.

WILLIAM LABIMER JONES, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO JONES &;

LAUGHLIN STEEL CORPORATION, OF PITTSBURGH, PENNSYLVANIA, CORPORA- TION OF PENNSYLVANIA.

PROCESS OF ROLLING ANGLES.

Application filed September 8, 1923. Serial No. 661,699.

My invention aims to reduce the rolling cost and increase the output of angle bars and the like as heretofore produced by conventional rolling mill methods and apparatus. Further aims and advantages of the invention appear in the following description of a preferred process devised by me for utilizing my invention.

In the accompanying drawings, wherein I have shown one illustrative form of apparatus for carrying out my invention, and without limiting the invention thereto or to the use thereof,

Fig. 1 is a plan view of a continuous rolling mill having groups of roughing rolls, in termediate rolls, and finishing rolls adapted to be driven at proper relative speeds;

Figs. 2 to 12, inclusive, are vertical crosssections on the lines 2-2, 33, 4-4, 55, 6-6, 77, 88, 9 3, 10-10, 11-11, and 1212, respectively, showing the shapes of the several roll passes and outline of the shape of the blank in each pass; and

Figs. 13 and 14 illustrate two shapes of angle bars made according to the process described herein.

In the particular embodiment of my invention selected for illustration herein, means for performing which are shown in the drawings, a suitable billet 11 is passed through a series of horizontal slabbing or roughing rolls 12 (see Figs. 1 and 2) which may be adjusted vertically in their housings to reduce the billet as much as desired in thickness and correspondingly increase its length, there being little or no spreading of the billet or blank in these rolls, notwithstanding it is not confined at the sides. One of the last sets of roughing rolls may advantageously be provided with a shallow groove 13 for forming a rib 14 on one side of the blank 15 as it emerges from the roughing rolls (see Fig. 4).

Following the roughing rolls the blank is passed through a set of vertical edging rolls 16 (see Fig. 5) provided with slightly tapered grooves 17 to determine the width and true the edges of the blank. These edging rolls are adjustable toward and from each other to control the width of the blank to suit the size of angle bar which it is desired to produce.

Further reduction in thickness of the blank may be secured by additional passes through the horizontal intermediate rolls 18, wherein the rib 14 is preferably given a square corner, and a groove 19 may also advantageously be formed in the blank opposite the rib by a suitable collar 20 on one of the rolls (see Figs. 6, 7 and 8).

A second edging pass in vertical rolls 21 having chamfered and slightly tapered grooves 22 (see Fig. 9) follows the intermediate rolling to center the rib and true up the edges of the blank to their final width and shape preparatory to the finishing passes. These grooves 22 may be shaped so as to round the edges of the blank if desired. The rolls 21 are likewise adjustable to suit the desired width of the blank for different sizes of angle bars. Preferably the rolls 16 and 21 are mounted so as to be readily removable and interchangeable with similar sets of rolls having narrower or wider grooves for rolling different flange thicknesses, thereby enabling a wide range of sizes of angles to be rolled.

Additional sets of horizontal reducing rolls 23 (see Figs. 10 and 11) precede the finishing rolls 24 (see Fig. 12) all of which are adjustable vertically still further to reduce the thickness of the blank and'increase its length. The reducing rolls 23 are grooved to form open bending passes wherein the blank 15 is bent lengthwise to an obtuse angle in cross-section (see Fig. 11), the'rib 14 and groove 19 facilitating this operation; and in the final pass the blank is'bent to a right angle in cross-section (see Fig. 12), the grooves being shaped to produce an angle bar 25 with either a fillet 26 (see Fig. 13) or a square root 27 (see Fig. 14) as desired. 1

The same process may be advantageously applied to rolling angle bars with unequal legs, although preferably in such case the roll grooves are shaped to provide more space for the flange on one side of the axial rib than on the other, and the leader and finishing passes are tilted to keep the lower edges of the legs in approximately the same horizontal plane. It is desirable to provide a second series of grooves and collars along side the grooves 13 and collars 20 for rolling angle bars with unequal legs, and additional grooves 17 and 22 for rolls 16 and 21.

One of the advantages of my process is that it permits all of the reduction in thickand more reductions at one heat, and enabling the production of a larger output of angle bars than with the processes and mills heretofore in use.

My invention obviously is not restricted to the particular embodiment thereof herein illustrated and described.

hat I claim and desire to secure by Letters Patent is as follows:

1. The process of rolling angle bars comprising reducing the thickness of the billet in roughing rolls, edging the blank thereby formed to narrow its widthin rolls arranged at right angles to the roughing rolls. further reducing the thickness and forming a lengthwise rib on the blank, edging and centering the ribbed blank by rolls arranged at right angles to said rib forming rolls, and finishing the angle bar by bending it to cross-sectional shape along said rib.

2. The process of rolling angle bars comprising reducing the thickness of the billet in roughing rolls, edging the blank thereby formed to narrow its Width, further reducing the thickness and forming a lengthwise rib on the blank, edging and centering the ribbed blank and finishing the angle bar by bending it to cross-sectional shape along said'rib, all said reducing operations being performed with the edges of the blank un confined laterally.

3. The process of rolling angle bars comprising reducing the thickness of the billet in roughing rolls, edging the blank thereby formed to narrow its width, further reduc' ing the thickness and forming a lengthwise rib on the blank, edging and centering the ribbed blank, and finishing the angle bar by bending it to cross-sectional shape along said rib, said reducing and bending operations being performed with the edges of the blank unconfined laterally.

4;. The process of rolling angle bars comprising reducing the thickness ofthe billet in roughing rolls, edging the blank thereby formed to narrow its Width, further reducing the thickness and forming a lengthwise rib on the blank, edging and centering the ribbed blank, and finishing the angle bar by bending it to cross-sectional shape along said rib, said bending and finishing operations being performed with the edges of the blank unconfined laterally.

5. The process of rolling angle bars at a single heat in open passes in a continuous mill characterized by repeatedly operating on the thickness and on the width of a flat blank at separate stages Without twisting the blank prior to bending to cross-sectional angle form.

6. The process of rolling angle bars as a continuous operation at a single heat from flat blanks comprising preliminary reducing and edge shaping operations in passes not completely confining the blank on all sides, and finishing in an'open pass for bending to cross-sectional shape.

7. The process herein described of rolling angle bars as a continuous operation at a single heat from flat blanks by reducing the thickness and width successively in open passes, followed by bending to angular shape in one or more open passes, whereby different sizes of bars maybe produced in the same roll grooves.

8. The process of rolling angle bars at a single heat comprising passing a suitable blank through a series of rolls having reducing passes in an uninterrupted straight line path, to form a flat blank having a corner rib and opposing groove oni-ts fiat sides, and determining the width of the flanges and ,median position of the corner rib by edging the blank in vertical rolls having grooves cooperating with the sides of the rib.

In testimony whereof, I have signed my name to this specification.

WM. LARIMER JONES.

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