US1537092A - Apparatus for and method of forming and handling sheet bars and the like - Google Patents

Description

May 12, 1925. 1,537,092 v w. J. STOOP APPARATUS FOR AND METHOD OF FORMING AND HANDLING SHE-ET BARS AND THE LIKE Filed ec. 13, 1922 [2 Guam i .Piiteiited May 12, 19 25 ar rarwrcs FOR m METHOD or romumc AND H LIKE. a

ANDLING SHEET BARS AND Application filed December 13, 1922. Serial No. 606,598.

To all whom it may concern;

Beit known that I, WILLIAM J. S'roor, a citizen of the United States of America, and resident of NVheeli'ng, county of Ohio, 5 and State of West Virginia, have invented certain new and useful Improvements in Apparatus for and Methods of Forming and Handling Sheet Bars and the like, of which the following is a specification.

This invention relates broadly to a sheetbar rolling and handling system, and more specifically to an apparatus for and asys tern or method of rolling, treating and handling sheet bars. v I

It'has been the general and practically universal practice heretofore to pile sheet bars in stacks immediately following the rolling thereof and While said bars are still heated to a .very high temperature. Such 20 stacking, commonly termed hot piling,

invariably results in a reduction of the carbon content of the bars andfrequently results incomplete decarbonizationlof the surfaces of the bars, and, further, results-in enlarging or coarsening the surface grain of the metal. In such hot piling the carbon is furnished oxygen by the scale on the surface of the bar, and this scale is reduced to a lower oxide of such harder nature that it is caused to cling or adhere very closely to the surface, with the re-,

sult that it bakes on the bar instead of cracking off. This condition of the bar, instead of being improved in reheating, is aggravated, each subsequent heating actlng to enlarge or coarsen the grain, the bars being rarely heated to grain-reconstruction temperature in such reheating, or even in box annealing. Additionally, the bar showsan imperfect surface finish due to the hot rollin strains; Sheets rolled from such hot-pi ed bars accordingly retain scale pittings and other surface inequalities and imperfections of thebars, rendering their surfaces rough and extremely difficult to polish, and also requiring an excessive amount of tin and spelter coating for the production of tin plate and galvanized sheets.

By my present invention the bars are handled and treated in such manner that the quality of the metal is improved, much of the scale is removed from the bars, and the reduction of the carbon 'in the surfaces of the bars is very largely prevented, resulting in said bars possessing relatively smooth and fine grained surfaces- When ably adapted ,for deep drawing purposes that is, for use in the manufacture of hol- .low sheet metal ware or articles produced by deep drawing processes. They possess a dense, smooth and practically erfect sur face finish, and are capable of eingreadily polished and also being smoothly coated in tinning or galvanizing with a marked saving in the quantity of the'coating material employed. Further, the sheets have fine grain structure,- do not indicate surface decarbonization and do not'possess the usual oxide enclosures.

Thus,it is the primary object of this invention to provide, in association with a barmill, aseries ofmechanisms arranged ins-such relation that-the sheet bars from said mill are individually handled to effect prompt cooling thereof without coming into direct contact one with the other. a

A further object is to provide a mill for rolling sheet bars having associated .therewith a bar-cooling bed and intermediate V automatic mechanisms whereby, in a continuous-series of operations occurring in' proper "sequence, the metal emerging from the delivery roll of the mill is sheared into bar lengths and said lengths are individually handled to eflect boshin'g, air cooling and final piling thereof. A still further object is to provide apparatus whereby sheet bars are produced and handled in an expeditious and wholly automatic manner from-the time theyare rollecluntil piled in orderly form andin fully cooled condition at a point remote from the rolling point. i

In describing the invention in detail, reference is herein had to the accompanying drawings, in which Figure 1 is a diagrammatic view of my invention, illustrating the preferred relative arrangement of the individual mechanisms;

Figure 2 is a partial diagrammatic, view showing the bosh and flying shear occupying relative positions the reverse of thoseshown in Fig. 1; r

Figure 3 is a view similar to Fig. 1 with .intothe coldwater of the bosh. v which is preferably of the form disclosed in my co-pending application for patent,-

(r the cooling bed omitted; and Figure 5 is a View similar to Fig. 2 showmg the cooling bed omitted.

Referring to said drawings, 1 indicates the final, or delivery's'et', of rolls of a mill employed in the rolling of sheet bars, said set being preferably"thefinal set ofa mill of continuous type, generally designated in F ig. 1- by the reference character -A. Emerging from said rolls 1 at high speed, the long strip of reduced metal passes from the'mill to a set of pinch rolls 2 locatedin' the line of its travel. In the arrangement which is at present preferred, said pinch rolls 2 are located between a flying shear 3 and a boshing tank 4, said shear being preferably located adjacent to said rolls 1, and the bosh at the opposite side of said pinch rolls, as shown in Figs. 1 and4,' but the relative positions of the shear and the bosh may be reversed, as shown in Figs. 2 and 5. Said flying shear actstocut or shear the advancing reduced ingot into bar lengths without interferring with or retarding the advance movement of the metal, and

whether said shear occupies the position relative to the bosh shown in Figs. 1 and l, or that shown in Figs. 2 and 5, the metal, traveling at high speed and at the final barrolling temperature, is promptly plunged Said bosh,

Serial No. 560,587, is made of such short length that the metal is submerged therein but momentarily, the purpose being to effect a sudden, but not too great, reduction in the temperature of the bars. More specifically stated, it is designed that the temperature of the bars shall be reduced to a substantial extent by water cooling while said bars are still in rapid motion. Such partial reduc tioiwof temperature may be elfected without undue distortionof the bars, whereas such distortion wouldv occur were the bars-to remain submerged in the bosh until fully cooled. In this sudden initial cooling and the rapid forward travel of the bar through the bosh, much of the scale carried by the bars is removed.

In the'arrangement shown'in Fig. 1 ','the.

forward to a set of pinch 'rolls 7, whence I they are advanced to a bar piler 8 which may be of any approved type.

The conveyors of he ,cooling bed,. even when advanced at maximum speed, transport the partially cooled sheet bars deliveredthereto so slowly that, when the bar piler is reached, the heat thereof is dissipated in the air to the extent that no alteration in the physical character of the surfaces-of the. bars due to the remaining heat can occur following piling of the bars.

'In the modification shown' in Fig. 3, in

which the bosh is omitted, it is designed that cooling of'the bars shall be Wholly acfiOglPllShQd in the travel of the. air-cooling In Fig. 4. a plurality of alined boshing tanks into which the bars are successively plunged are employed, and the air coolingbed is omitted, the bars being passed directlyfrom the final bosh 4, tothe bar piler 8.

In Fig. 5 the shear is located for shearingthe bars following bashing, and the bars are thence passed directly to .the bar piler, the air cooling bed being omitted.

-While any of the combinations disclosed, and with the elements arranged as, in Figs 8, 4 and 5 may be employed, and each is productive of .improved results as compared with the prevailing practice of hot piling, it is at present considered that the best results are obtainable through the combined fuseof bosh cooling and air cooling attained a mill for reducing the metal, of a flying shear located for shearing the reduced metal into bar form as it advances from said mill, a boshing tank located in alinement with the path of travel of the bars, means for advancing said bars through said tank, a bar piler, and means for advancing the boshed bars to said bar piler."

2. In a continuous sheet-bar forming and handling apparatus, the combination with a mill for reducing the metal, of a flying shear located for shearing the reduced metal into bar form as it advances from said mill, a boshing tank located in alinement with the path of travel of the bars, means for advancing said bars through said tank, a bar piler, and an air cooling bed intermediate said boshing tank and said bar piler, said cooling bed embodying means by which the bars are advanced.

3. In acontinuous'sheet-bar forming and handling apparatus, the combination with a mill for reducing the, metal, of a flying (a) said bar piler,

shear located for shearing the reduced metal intobar form as it advances from said mill,

a bar piler, means intermediate the shears and said bar piler foresuccessively cooling said bars in their travel to S'Elldlbjll piler,

said means including devices for sucees sively andseparately advancing said bars said bars 'to said coolingr'means.

, 4.j" I n a.conti nuous sheet-barformi'ngfand" hand-1mg apparatus, the combination witha mill for'redueing themetal, of a flying shear located for shearing the reduced metal into bar form as it advances from said mill, a

bar piler, a cooling bedembodying advanc-- ing carrying devices, means for advancing the bars following shearing and for delivering the same to said bed, and means for-advancing said bars from said bed to said I bar piler. v

I 5. In a continuous .sheet-barforming and handling apparatus, the combination with.

a continuous bar mill, of a boshing tank located adjacent to said mill and through which the reduced metal is directed 1 in its travel from said mill, a flying shear whereby said reduced metal is sheared into ban lengths, a1r-coolmg means for said =bars,. means for deliver ng the sheared bars to said air-cooling means, a bar piler, and means for advancing said bars from said air-cooling means to said'bar piler.

6. In a continuous sheet-bar forming and handling apparatus, the combination with a continuous bar mill,of a boshing tank located adjacent to said mill and through which the reduced metal is directed in its travel from said mill, a flying shear whereby said reduced metal is sheared into-bar lengths, a bar piler, and means for advancing the sheared bars to said bar piler.

7. A continuousbar forming'and handling apparatus, comprising a bar mill for reducing the metal to bar section, shears for cutting the bar section to bar lengths while in motion, conveyors for efi'ectmg cooling of such bars while in motion, and means forpiling said bars.

8. The method of producing and auto-. matically handling sheet bars, which consists in rolling the metal into bar form, pass-v ing the reduced metal through a boshing tank, shearing said metal into bar lengths,

delivering said bars to transporting devices, advancing said bans on said dev ces, and

finally piling the .cooled bars.

9. The method of producing and auto'--' matically handling sheet bars, which connd means for delivering sists incutting-the metal into barlen'gths as it passes from thereducing rolls, passing the' bars individually through a bashing tank, delivering said-bars to transporting devices, advancing said bars on said devices for separately air-cooling the same, and

finally piling the cooled bars.

10. The method of producing and automatically handling sheet bars, which consists in successively rolling the metal into ba'r form, shearing said metal into bar lengths as it passes trom the reducmg roll, pass11ig -thembars individuallythrough a bo shing tank, and then subjecting said bars individually to further cooling by air.

11.-The method of producing and auto- -matically handling sheet bars, which consists in successively rolling the metal into bar form, shearing said metal into bar lengths as it passes fromvthe reducing rolls,

and then passing the 'bars individually ,metalinto bar lengths, passing the bars through a boshing tank to effect a reduction of temperature, and then advancing the bars from said tank for effecting further reduction of temperature by air cooling. 14. A continuous bar forming and handling apparatus comprising a bar mill for reducing the metal .to bar section, shears for cutting the bar section to bar lengths, and means for momentarily submerging said bars in a cooling bath. a I

15. A continuous bar forming 'and handling apparatus, comprising a bar mill for reducing the metal to bar section, shears for cutting the bar section-to bar lengths, and a boshing tank through which the bars are separately advanced for effecting partial cooling of the latter through immersion in a cooling liquid.

In testimony whereof I affix my signature in presence of two subscribing wit- 'nesses.

Witnesses z a ILLIAM J. STOOP.

'- -MART1N Mime, I

E. DUNLAP.

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