US1715330A - Rolling wide strips - Google Patents

Description

May 2, 1929. 'n'. c. RVNDLEMAN .1,715,330

ROLLING WIDE STRIPS' Filed July l, 1926 v 3 lSheets-Sheet 'l /Vofman C. @end/ema s@ Mr WW? N. c. RENDLEMAN ROLLING WIDE STRIPS May 2s,v 1929.

Fle'd July l, 1926 3 Sheets-Sheet 2 on d. 1,6.

TI Il @N Mattozmgo' May 28, 1929.

N. c. RENDLEMAN Y ROLLING WIDE STRIPS Filed July 1`, 192e s sheets-sheet Swanton m, e a E m l cluding thin Passed May 2s, 192e.

UNITED STATES PATENT OFFICE.

NORMAN C. BENDLEMAN, Ol' DORMONT, PENNSYLVANIA, VASSIGtNOR TO JONES LAUGHLIN STEEL CORPORATION, 0F PITTSBURGH, PENNSYLVANIA, A CORPORA- 'rIoN or PENNSYLVANIA.

ROLLING WIDE STRIPS. l

Application Med July 1, 19.26. Serial No.119,979.

This invention comprises a method of and means for rolling widelstrips or shapes of .steel from much narrower slabs, and aims to produce relativelyI wide and thin articles, in-

gailge strips and sheets, at a single heat. 5 An important object of the invention is the production of sheets such as are required for finishing as tin plates, without the usual number of rolling steps, and without excessive reductions of cross-section demanding a large power outlay or use of an unusual number 'of roll passes.

Further objects are to enable moderate size slabs to be used for all widths of finished articles, to reduce the wear on the rolls, and toincrease and improve the output of the mill. An illustrative arrangement of a rolling mill plant for carrying out the invention in lthe production of strips is shown in the accompanying drawings,'wherein Flg. 1 is a plan or layout of a suitable plant; l

Figs. 2. and?) Iare diagrams showing the shapes of the first two passes of the mill for producing the particular size of strip selected for illustration;

Fig. Il is a cross-section of thecorrugated strip produced by the corrugating rolls;

l Fig. 5 is a cross-section of the corrugated strip after passing throughl'the firstset of rolling dies in the flattening machine;

Fig. 6 is a plan View and Fig. 7 a front elevation partly in section of a machine for flattening the strip at an intermediate stage of production;

Fig 8 is an end View of the gearing and driving means for the strip flattening machine; and

Figs. 9 and 10 are cross-sections of the same on the lines 9-9 and 10-10 of Fig. 6,

respectively.

In the example shown, the billet or slab 11 (see Fig. 2) may be approximately fifteen inches wide, three inches thick, and six or eight feet long. Such slabs may be readily produced on a `blooming or slabbing mill from a twenty inch ingot and sent to the strip m'ill Without reheating.

In the illustrative example, the slab is passed through two sets of corrugated rolls 12 and 13 (see Fig. 1) in quick succession, these rolls being arranged in alinement and erably being; alike so the rolls may be reversed.l

The angle of the [side walls of the rooves 16 in the rolls 1,2 and 13 is prefer'av ly the same for all the grooves of each pass, and the outer fillets 17 are about the same size in both sets. The inner fillets are smaller in the grooves of the second set, and the side walls are steeper, but the l'center line length of the blank is the same.. In the illustrative embodiment shown, the vspace between the sides of the grooves-of the first set of rolls 12, measured at right angles to the walls, is about -one inch; and that between the side walls of the grooves of the second set of rolls 13 is about one-half an inch. Notwithstanding that the thickness ofthe slab is reduced froml 37 to 1 in the first set of rolls, the reduction of cross-sectional area is only about onethird, because the slab measured alon its zig-zag centerline is now about 30y rom side to side. It is apparent that the reduction in the second pass is also about one-third. These reductions are moderate, and do not involve much loss of power nor wear and tear on the rolls and their bearings'.

In the illustrative example, the slab issues from the second pass in a corrugated strip 1-8 twenty or more feet long, and approximately one-half an inchthick, the overall width be-v ing about fifteen inches but the centerline i rotate through part of a revolution by means of the gear 28 and rack bar 29 connected to a piston operating in the hydraulic cylinder 30. Feeding tables 3l, 32. are provided for aiding in guiding the strip into the dies 19, 20, respectively.

From the pla te flattener the strip is passed through a continuous strip mill having an adequate numbr of sets of rolls (four being illustrated) for reducing it to the desired gauge. Suitable motors 34 and gearing are provided for driving the rolls 33 at their proper speeds.

The strip thereby produced may be aboutV thirty inches wide and from sixty to two hundred feet long, depending on the gauge' or thickness to which it is' rolled. The strips may be cut u into plates or sheets, or they may be coile as is'A well understood in the art.

The foreging illustrative example may be considered typical of the mode of operation applicable to the production of various lengths, widths and thicknesses o f comparatively wide strips or blanks; but it is evident that the number of passes and the shapes of the corrugating passes, and the construction and arrangement of the apparatus may be modified or changed` to suit the character of product and conditions of use to which the invention may be applied.

For example, the cross-rolling may be performed by continuously rotating means disposed upon axes at angles to the direction of movement of thevstrip.

The invention is not restricted to the mode of operation nor to the construction or arrangement of the machine described; but what I desire to secure by Letters Patent is as follows:

l. The process of producing wide strips and blanks by first rolling a suitable slab to reduce and eorrugate it lengthwise. and thereafter flattening out the corrugations therein by engaging it progressively from one margin to the other and forcing them laterally.

2. Apparatus and blanks comprising grooved rolls for rolling a suitable slab to reduce and corrugate it lengthwise, and means for flattening out the corrugations therein engaging it progressively from one margin to the other. said flattening means comprising segmental top and bottom die members extending lengthwise of the article.

for producing wide strips* 3. The process of producing wide strips and blanks -in three successive operations by first rolling a suitable slab to reduce and corrugate it lengthwise, and next flattening out the corrugations therein by engaging the corrugated slab from end to end Iand forcing its margins laterally, and thereafter rolling lengthwise the wide strip or blank thus formed to reduce it to the desired thickness.

4. The process of producing wide strips and blanks by rolling a suitable slab to reduce it and corrugate it lengthwise,Y and flattening out the respective corrugations successively to spread the article laterally.

5. The process of producing wide strips and blanks by rolling a suitable slab to reduce it and eorrugate it lengthwise, and flatt'ening out the corrugations by successively forcing them laterally to spread them and increase the width of the article simultaneously and uniformly from end to end.

6. The process of producing wide strips and blanks by rolling a suitat'e slab to reduce it and corrugatel it lengthwise and successively flattening out the corrugations in-` dividually throughout their entire length to spread the article laterally.

7. The process of produoin and blanks from narrower sla s by rolling them lengthwise to form deep grooves or corrugations, 'followed by cross rolling to flatten out the corrugations.

8. The process of producinV wide strips and blanks from narrower sla s by rolling them lengthwise to form deep grooves or corrugations, followed by cross rolling to flatten out the corrugations, and finishing by longi. tudinal rolling, all of said operations being performed at one heat.

9.Means for producing wide strips and blanks from narrower slabs comprisin a rolling mill having corrugated rolls fory orming longitudinal corrugations in the slab, and a flattener having two sets of oscillating dies arranged parallel to the length of the slab and working 'in alternation crosswise of the direction of the corrugations to flatten them,

vthereby widening the article by successive stages.

10. Means for producing wide strips and blanks from narrower slabs comprisin a rolling mill-having corrugated rolls for orming longitudinal corrugations in the slab, and a flattener comprising oscillating dies working crosswise of the -direction of the corrugations to flatten them, thereby widening the article.

11. The combination of a rolling mill for corrugating a slab lengthwise to reduce its thickness, and a flattener having two sets of oscillatingdies workin in alternation crosswise of the direction o the corrugations, the first set being at a higher elevation to feed into the second by gravity, whereby the slab is flattened b successive means operating on it transverse y.

wide strips l2.l The combination of a rollingmill'for corrugating a blank lengthwise to reduce lits thickness, and a flattener having flattening means engaging the blank lengthwise and working crosswise of the direction of the corrugations, whereby the blank is flattened and widened by means operating on it transversely. l -4 13. The combination of a roughing mill having corrugated rolls for reducing and corrugating a blank, a flattening device operating transversely of the length of the blank for 4flattening out the corrugations to Widen the blank, and a rolling mill .for reducing and elongating the widened blank.

14. The combination of a roughing mill having corrugated rolls for reducing and corrugating aslab, a iiattening mill having complementaryV rolling means operating transversely of the length of the Yslab for attening out the corrugations to form a plate, and arolling mill for reducing Aand elongating the plate'.

" 15. The combination of a roughing mill for rection of the corrugations, whereby the blank is flattened and widened by means operating on it transversely and a rolling mill for reducing and elongating vthe widened blank.

16. The combination of a reducin and corrugating mill having a series of ro ls 12, 13, provided with corrugating grooves, a iattening device comprising successive transversely operating rolling means 19, 20, and a rolling mill having its rolls 33 arranged for operating in a direction at right angles to that of the flattening device, substantially as described.' '4

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

NORMAN e; RENDLEMAN. l

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