US1689512A - Hot rolling - Google Patents

Description

i Oct. 30, 1928. s. G. 4wolQ'I-ON HQT ROLLING 5 Sheets-*Skiset A 1 Filed Dec. 19, 192.1

Witnesses.'

V oct. 3o, 1928.

, S, G. woR'roN HOT .ROLLING Fi1ed Deo. 19. 1921 5 Sheets-Sheet 2.

Lilli/4d Oct. 30, 1928, y l "15689512 s. G. woRToN HOT ROLLING Filed Dec. 19. 1921 5 Sheets-Sheety 3 Oc't. 30, 1928. 1,689,512.

s. G. WOR-TONl l HOT ROLLING Filed Dec. 15?: 1921 1, 5-Sheets-She-et 4 Patente/cl (Jet. 3l), W23.

UNI-TE STTES PATE l (OFFICE.

SAMUEL Gf. Willi/Tll, F DUQESNE, EPENSYLVANA.

EGT RLLKHG.

Application filed December i9, 19%1.

hot blooms after they have been rolled in the' blooming mill.

- complete side elevation being had by our oi lu rollingr steel articles such as blooms and billets, longitudinal surface seams and other defects are formed in the metal. Heretofore it has been the practice to remove these surface defects after the metal has cooled, by chipping),P or cutting away the metal, and such operatlons are costly, due to the amount of labor required. Also since it was necessar to allow the metal to cool before such de ects could be removed', the heat remain,- ing in the metal after the blooming mill operations, Was lost and the metal had to be ontirely geheatec'iifrom a cold state before finish rolling.

With the present method the surface deects are removed by grinding While the metal is hot, and preferably immediately after it has been rolled in the blooming mill. The metal, which is still at approx imetely a rollingx 4tempcrature and therefore is mole or less plastic, is readily cuiJ away by the grindinor Wheels in removing the (le-- 'ects,"and ut't ermore the blooms are still. heated after the defects are removed, and may be transferred direct to the finishing mill in such heated state, so that materially less reheating is necessary' to again. bring; the blooms up to a rolling temperature for lin ish rolling than is necessary when the blooms are cold..

In the accompanying drawings, forming a, part oi this spendi-cation, )Figure Il is a plan showing a blooming;N mill having!2 one au rangement of apparatus adapted for use in carrying out my invention and Figui-el" .is a continuation the plan of Figure l, a com plete plan being had by joining' Figures l. and on the lines X-- of these figures.

Figure 2 is a side elevation oi the apparatus oii Figure l and Figure 2 is a side elevation of the apparatus of Figure 2, a

ing l" ff'ures and 2a on the lines Y these ilgrimes.

Figure 3 is a diagrammatic elevation of a mill showing" a modified arrangement oi" ein pointus adapted for use in carrying out my invention.

:es l and 5 are diagrauunatic plans Serial No. 523,362.

showing further modications in apparatus .usable in carrying out myv invention.

lt will he understood 'that the apparatus shown in the several. figures described above, and which will be described in detail hereinafter, are only illustrative of the various vmeans that may bc used to carry out my in- .vention and are not construed as a limitation thereof.

Broadly m invention consists in receiving blooms or ot ier articles, having surface defects to be removed, at a red or approximately rolling heat, pointing;- the forward end of such blooms o articles, straighteningr the blooms or articles, antigrinding one or more of the side. faces of said blooms or articles lto out away the surface or surfaces a sullicient depth to remove the defects.

Referring particularly to Figures l, la, 2 and ila of the drawings, the blooming mill, which is of ordinary desi gn, is designated as a Whole by the letter A, and ,comprises the usual roller tables 2, housings 3, and reducing rolls lll.

A grinding table B is located Vfmward 0l' the blooming mill A and comprises a table member 5 having a plu 'ality of power driven transfer or conveying rollers il journaled therein. Vertical and horizontal bulldozers- 7 and 8 are mounted on the grinding table B which are adapted to taper the forward end of the bloom as it passes to the grinding table B from the blooming mill A. A suitable straightening mechanism :7 is mounted on the table l 'forward of 'the bulldozers 7 and 8 to straighten the grinding' machines C and D are mounted on the grinding` table ll lIcuccessively `forward oi' the straightoningv machine or mechanism 9. .ci pair of pinch rollers lll is mounted he tween the straightening` machine 9 and the ,orimlin'g machine C, and a second pair of pinch rollers ll is mounted ust forti/ard of the grinding machine l). The pinch rollers l() andll are adapted to feed the blooms being' operated upon through or between the lgrinding machines (l and l).

The grinding machines C and l) are provided with horizontal and vertical cupshaped or riugzlilce grinding wheels 12 and lil, respectively, mounted on suitable shafts and driven through suitable gearing by motors lll and l5, respectively. Thehorizoxy tal grinding Wheels l2 ot' the machine C are blooms before they are ground. Suitable horizontal and vertical all adopted to grind wey the detects on the sideftaces ot' the bloozine; or other articles being operated upon e., they nre therebetween, and the vertical tine' Wheels 13 are adapted to vgrind or eut oivey the. defects on the upper endlower tacos of blooms passed therebetween.

The grinding table B extends en. oppreoieble distance beyonifl the grindingl machine D end terminates et e sheer ol usuel design having cutting jews lo and l?, jaws being adapted to ont the rolled blooin into the desired short lengths. A. suitable conveying table 18., located forward ol? the shear E, is provided toconyey the sli-.eared y blooms to any desired point.

lt Will be understood that the ,grinding machines C andD may be ot any desired construction and the grinding Wheels muy' be of any desired or necessary design, in order to out ewey the side surfaces of blooms of different cross section in' the most exp@ ditious manner.

My improved method when carried out with the above described mechanism is es follows'. The ingot from which the bloom is formed is first rolled in the blooming niill A to Work the metal and to reduce 'the Cross sectional aree -(ind elongate the'ingot so es to forno e bloom, this being done in the usuel manner. The .multiple -lengtli bloom fitter being :formed is then delivered by the table 2 to the grinding table B which continues to nio've the bloom forward until its forward end enters the bulldozers 7 and The bull dozers ere their operated to point or ener the forward end ot the bloom .so es to facili tate its movement into end through the strziigbtening machine El and grinding rnechimes C and D and between the pinch rollers 10 end 1l. 'llhe longitudinal surface seems and other surface detects that elle formed in rolling the ingot to torni e blooin ere removed by the grinding .machines C and ll The bloom fitter being; pointed and straightened is engaged by the pinoli rollers l() und is fed thereby between. the horizontal grinding Wheels l2 of the grinding machine C, und the grinding Wheels engage the side enrfzices of the bloom and out or grind away the metal to e, depthsullicient to remove the surface detects.` Theblooni as it is led through the grinding machine C is passed into the grinding :machine D end between the pinclirolls ll, so thetlior e pero of its travel all four sides are being worked upon. rllhe grinding Wheels 13 ot the grinding noachine D are arrenved to engage the top and bottom surfaces o; the bloom sind to out or grind :may the metal to e depth sullioient to remove the surface detects iroin 'seid feces The bloom passes from the grinding; ineN chine D With smooth. ev'en side surfaces, vlree of defects, and is ready to be out into the vdezer 0 iron/red reither manually or mechanically,

desired short lengths for rolling into shapes. 'lhe time cons-omet passing the blooms through the bulldozers, straightening nieehine, end grinding inechines is so short that the metal is still. at red heet or tenrr peinture high enough 'for it to be readily sliezired. directly from the grinding' machines to the shears E and ere there cut into pieces ot' the desired. length., .lttor being ont to length by the sheer E, livered to the conveying table 1.8 which cerries rhein tol the finishing mill or other desired location, l

ln Figure isshom op .ieretue lor re- .movingJ the surface defects 'h the blooms alter tlf ,J liefve been `sheered to length. ln this ligure the letters il designate the blooming. inill es e, whole, and 'Ee designate the 'which elise adopted to deliver the sheiired blooms to e, grinding trible lll). The grinding lll is ot slightly dillen ent eonstrinftion. since it adapted to operate on blooms of e `length materially shorter thnn'thosooperated upon. by the epparrains; ol? Figures l, la, 2 4find 2da. The table El is provided with n, horizontal bullly forward of the shears lds end with e s e glitening machine 2l for- Werdroit the lnilidozer 20. A pair of horizontal grinding Wheels Q2 are er1-ringed llor- Werd orf the straightening machine 21 which are adopted to engage with end cut evey or igrind the side sorteo-es of the blooms. inch rollers 23 end 2li arranged respec tively et the rear and in iront ol the grinding Wheels 222, are adapted to move the blooms between the grinding Wheels Z22.

il. second pair oli horizontal grinding wheels arranged end spaced en appreeialole distance 'forward of the grinding Wheels IThe table space between the grinding; Wheels 22 and 25 is utilized as a turning space, and the blooins are turned so that the the blooms tre de- Therefto-re the blooms nre passed.

lll)

top bottoni or horizontal sides oi' the bloom when guessing between, the grinding wheels 2i?, become the vertical slides and are in nosrtion to he engaged by the grinding 'Wheels 25. Pinch rollers 26 and 27 are arranged, respectively, yto the rear end lor- 'Werd oi2 the grinding wheels 25 and are adapted to nieve blooms from between the grinding Wheels 25, rllie blooms after passing between the grinding Wheels ere conveyed to the viinishing null in enydesired manner.

il second 'horizontal bulldozer 28 is located on the trible E to the rear ot the pinch roll- *ers 26, and is edgipted to taper the forward portieri of the side :laces of the blooms to beground by the grinding Wheels 25.

ln. carrying out my improved method with the apparatus of Figure 3, the order of' the successive steps is slightly olianged. That :tocarla Wheels 22, become the vertical sides for' passing through the grinding Wheels 25e The bulldozer 28 then operates to taper the forward portion ot' the vertical sides of the blooms before they pass between. the grinding,- wheels 25 where the surface detects-are cut from said sides.

lt will be understood that the grinding machines may he ot any desired cmistruc-v tion, the essential Jfeature being that they,

have grinding surfaces 'for cutting away the defects in the surfaces of heated articles ot any cross section. lt is also to be understood that disk wheels having peripheral grinding'surtaces maybe employed in place of the cup-shaped or ring-lihe-Wlieels shown.

In Figure 4; a further modified mecha nism is shown for, carrying out my inveiition. ln this ligure the letter F designates the blooming mill and Gr4 designates the shears, both of which may be of any standard design.

An extended shear table` H extends for; ward beyond the shears tor an appreciable distance, and a grinding table I is arranged alongside and parallel With the shear table, being; connected therewith by a series of transfer' skids or other suitable transfer mechanism J.

'lhcgrinding table l is provided with aj vertical and horizontal bulldozzingA mechanism 30, a grindingbr mechanism 3 pinch roll -33 at the rear and iront ot the the mechanism o1 Figure s, the sheared blooms are transferred across the skids J onto the table l, and the tor-ward ends thereof are tapered by the bnlldozing mechanism 30. The blooms are then passed through the4 grinding mechanism 3l which grinds the vertical sides thereof to remove surface defects therefrom. The blooms, after passing beyond the grinding mechanism 31, are turned either manually or mechanically, be-

fore entering the grinding mechanism 34 so to present the unground surfaces thereof to the grinding Wheels ofthe grinding mechn anism 34. After passing .through the grinding mechanism 3st,4 all tour sides ot the blooms will have been ground or cut away sufficiently to remove all surface defects.

ln. Figure 5 al mechanism is'shown which is particularly adapted for use'in removing the surface detects from round blooms, billets, barsv or other steel articles, either finished or unfinished.'

The mechanism of Figure 5 comprises rcceiving skids K, a furnace transfer table L, a furnace charging machine L', a continuous heating furnace M, and a deliveryv table N, all of which may be of any known construction, and a grinding mechanism O. The grinding mechanism O comprises a pair ot rear cross rolls ,38 havingxconcave surfaces, a grinding machine 89,- a pair of lor- Ward, cross .rolls 4K0, and a series of idler rollers il adapted to vsupport the articles beingr operated upon. A suitable run-out table 42 is provided on thedelivery end of the grinding mechanism O, which is adapted to receive and convey the ground articles to a suitable cooling bed 43.

In carrying out my invention with the mechanism of Figure 5, the articles being rolled, which may be either blooms,vbillets, inished or unfinished steel bars, etc., are transferred to the receiving skids K from which they aremoveolto the furnace transfer table in any desired manner. This transcharging machine L', which in aturn charges them into the continuous heatingiurnace M. The articles in passing throiixggh the furnace lvl are heated, to approximately a rolling temperature, and are then delivered to the delivery table N, which feeds them forward into the grip of the cross rolls 38. These cross rolls rotate and feed the articles forwardly between the peripherall faces of the horizontal grinding Wheels of 'the grinding machine 39, which cut away the surfaces ot the articles to. remove any surface defects.-

The articles as ted forwardly through the machinegfl) are engaged by ,the second set of cross rolls 4G, which continue to rotate the articles and pull them through the machine 39 after. they have passed from bem tween 'the cross rolls 38. The articles after passingr beyond the grinding machine '39 4are delivered to the run-outtable 42 which in turn delivers them to the cooling bed 4:3 Where they are allowed to cool.

The advantages of my invention willbe appreciated by those skilled in the art. By grinding the metal While heated, the surface detects are readily removed in a rapid, cheap and economical manner.'

In the `appended claims 'the expression side surfaces"7 is used in its broadest sense, and will be understood to'includc the top, bottoni and side surfaces of a square article,

fer table lconveys the blooms to the furnace l i the periphery of a round liar or billet, and the irregular surfaces or Contour of a shaped article. f

Many modifications in the apparatus, and in the stops of grinding the rolled articles will suggest themselves to those familiar with the art. A plurality of sets of grinding Wheels may he employed. so as `to successively operate on the suraceor surfaces of a bloom or other article and cause each. successive set of grinding Wheels to remove a part othe defective surface instead o'lf making one deep out in removing the defects, and other changes maj, he made Within the scopeV of my invention as dcinedin the appended claims.

l. The method of removing surface defects from rolled steel articles before final rolling, whichconsists in grinding all of the side surfaces of said articles having said defects therein while said articles are heated to approximately a rolling temperature.

9;. T he method of removing surface defects 'from rolled steel articles before iinal rolling, which consists in grinding all of the side surfaces ofsaid articles While said articles are heated to approximately a rolling ternperature and removing an approximately equal thickness of metal from all of said sur- .c laces.

SJT'ne method of removing suri'ace defects from rolled steel blooms, which consists in pointing the forward ends oi said blooms, i

my hand. SAMUEL G. WOR/ICN.

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