Патент USA US2135713код для вставки
Nov. 8, 1938. ‘2,135,713 c. B. HIGGINS MEANS FOR TREATING THIN STRIP METAL Filed Jan. 28, 1937 5 Sheets-Sheet 1 .l 1 Jnventor ' Nov. 8, 1938, 2,135,713 c. B. HIGGINS MEANS FOR TREATING THIN STRIP METAL Filed Jan. 28, 1937 5 Sheets-Sheet 2 IWl/H. il 3 3nvento‘r Nov. 8, 1938. c; B. HIGGINS 2,135,713 MEANS FOR TREATING THIN STRIP METAL ‘Filed Jan.‘ 28, 1957 5 sheets-sheet 6 Patented Nov. 8, 1938 2,135,713 ' UNITED STATES‘ PATENT OFFICE MEANS FOR; TREATING THIN STRIP METAL Clifford B. Higgins, Detroit, Mich, assignor to H & H Tube & Mfg. 00., Detroit, Mich, a cor poration of Michigan A Application January as, 1937, Serial N‘... 122,758 GCIaims. 7 This invention relates to means for treating thin metal which comes from the rolling mills in strip orribbon form spirally wound into rolls; and an object of the present invention is to pro 5 ,vide means especially adapted for subjecting such (Cl. 266-3)‘ for holding rolls 2 each formed of a thin metal T strip or ribbon coiled into roll form; second, a puller indicated as a whole by the numeral 3 for pulling from the rolls 2, the metal strips 4 comprising said rolls; third, an annealing fur- 5 a strip to an acid bath, during the continuous nace 5 through which said strips 4 are led from treatment of the strip by successively annealing, quenching‘ washing, drying and winding into roll form, with a ‘continuous movement of the strip. 10 It is also an object to increase the e?iciency of an acid bath .instrumentality, by providing end to end thereof; fourth, a quencher 6 for means operative in conjunction with such instru mentality for thoroughly agitating the acid and applying it to both surfaoesvof‘ the strip in a 1'5 manner to make it most effective in cleaning the metal, said instrumentality being adapted to be ‘ so arranged relative to the other instrumentali ties in the line of treatment that the metal strip will be led therethrough, and the acid applied ~ 35 40 water washer-9; eighth, a hot water washer l0; ninth, a drier H; tenth, a third puller l2 simi lar to the other pullers; and eleventh, winders 15 ‘I3, one for each of the several strips being treated and each of which strips 4 is being un wound from a separate roll 2. These several devices are therefore arranged in sequence and continuous operation. ing roll. ' It is a further object to provide certain other new and useful features‘in the construction and ' ’ - A Motive power is provided for driving the strip, 25 or as in the present arrangement shown, the _ arrangement of the said bath instrumentality, several parallel strips, by an electric motor 2| all as hereinafter more fully set forth, reference _ from which motion is transmitted for positively being had to the accompanying drawings where driving the several feed rolls of the puller 3 and from these rolls each strip‘ leads to an opening 30 n— . . Figs. 1 and 2 together form a diagrammatic in the end of the annealing furnace 5 and is outline illustrative of a continuous method. of passed longitudinally of the furnace and out treating, particularly adapted to include means through'the opposite .end thereof over a roll 24, embodying the present invention; the strip or strips passing through- the furnace V in the form of a loop or sag in the run of the 35v 7 Fig. 3 isa side elevation of an instrumentality illustrative of an embodiment of the present in yention for applying an acid bath to the 'metal ribbons or strips; _ ' and winding up the strip into roll form, all in a tinuous movement of‘ the strip inv annealing, . quenching, applying the acid and other baths 30 3; sixth, an acid bath illustrative of an em- 10, bodiment of the present invention and indicated as a whole by the numeral 8; seventh,‘ a cold the desired number of separate strips arranged 20 in parallelism, are simultaneously treated by passing them through the several devices con secutively and ?nally winding each upon a wind 20 in the most e?‘ective manner during the con 25 cooling the strips as3 they leave the furnace; ?fth, a second puller 1 similar to the ?rst puller _ > Fig. 4 is a plan view of Fig. 3: Fig. 5 is a transverse section substantially upon the line 5-5 of Fig. 3; ‘ ' Fig. 6 is an enlarged sectional detail substan tially upon the line B,—6\of Fig. 4; l Fig. '7 is ‘a section substantially upon the line . 45 1-1 of Fig. 6; ‘and Fig. 8 is a section on line 8-8 of Fig. 4. . -As illustrated in Figs. 1 and 2, several instru mentalities are shown insequence to illustrate means which may be employed to‘successively 50 perform the several steps 'in the treatment of metal ribbons or strips, the acid applying means embodying the present invention being ‘especially strip. ' y a * From the roll 24 at the forward end of the furnace, the strip or strips are led downwardly into the quenching tank 6 and then proceed over an idler 26 above the open top of the tank 40 and thence to the'second puller ‘I which‘ com- ~ prises a plurality of driven rolls similar in ar- . rangement to that of the puller 3 including driv ing rolls 28 and 29 and an idler roll 30. The shaft of one of the driving rolls of the 45 ?rst puller device 311s provided with a sprocket upon one end to be engaged by a long chain 3| ‘ which chain extends longitudinally past the fur nace 5 and quencher 6 and engages a sprocket upon the shaft of the roll 29.3 The several rolls 50 of the puller ‘I are therefore positively driven at the same speed as the rolls'of the puller 3 and adapted to be included as one of ‘said steps, said therefore the strip For strips are propelled ‘or _ series as shown including; ?rst, a cradle or moved forwardly at an even speed. 55 holder indicated as a whole by the numeral l - From the roll 30 of the puller device ‘I, the 56 2 2,185,718 strips 4 are led horizontally across a shallow tray 35a mounted upon tubular supports 35b extend ing across the upper side ,of an open tank 35 for holding a quantity of acid, and to insure the proper contact of this acid with both sides of .the strip or strips passing through the tray 35a and close to the upper surface ‘of the acid in said tray, said tank is provided with a series of bucket wheels 36 secured to stub shafts 3lrmounted in 10 bearings upon the upper edge of one side wall of the tank and between said wall and the adjacent side of said tray 35a, and each wheel 36 is pro and thoroughly cleaning the strips, the ?rst being a cold water washer 8. After being thoroughly washed by cold water in the washer 9, the strips are carried by idler rolls Ilia into the open upper end of the' hot water tank I0 and, passing through the hot water are further cleaned of any acid or scale carried thereby. ' From the hot water washer or tank ill, the several strips pass longitudinally through the 10 drier II ‘which ‘is equipped with gas burners, not shown, or other suitable heating means for heat vided with a series of peripheral buckets 38 se- . ing and drying the several strips as they are‘ cured to an end disk or wall 39 of the wheel, caused to travel through the drier by means of the peripheral wall of each bucket forming the third pulling device I! comprising a plurality 15 with of driven rolls having an arrangement substan a closed side for the bucket and the inwardly ex tially-the same as that of the puller ‘I. The tending radial walls of each bucket forming op posed sides with the inner side of each bucket lower roll 28 of this puller is positively driven by the chain 3| which is continued past the acid formed with a discharge opening 40 for dis 20 charging the acid picked up from the tank by tank 35, and the two water tanks and drier, en 20 each bucket during' rotation of the wheel. gaging a sprocket on the end of the shaft of the Mounted upon the tray 35a transversely thereof roll 29. The three pullers 3, ‘I and I! are thus and of said strips 4 opposite each of the bucket connected together to operate at .the same speed wheels 36, is a tubular trough 4| which has an open cup end 42 projecting into the wheel be tween the inner sides of the several buckets of that wheel so that as the wheel is rotated about this cup 42, acid will be picked up from said tank 35 by each of the buckets and as they pass over each cup 42, they will discharge their contents into said cups and the acid will ?ow from each cup into the end of its tubular trough 4| and out through the bottom slot 4|a of said trough di rectly upon the upper surface of the several‘ 35 strips 4 and into the tray 35a. The several bucket wheels 36 are continuously rotated by means of a sprocket chain 43 engaging a sprocket on the shaft of the roll 30 and passing and- thus drive the strips at three separate points . of their length at the same speed so that the sev 25 eral strips or ribbons which are being treated will ,be moved forwardly at an even speed throughout the length of the several cooperating instrumen talities for treating the metal. ‘ After the several strips have been treated, 30 cleaned and dried, it is most desirable that they _ be wound into separate spirally wound rolls to facilitate handling, and to so wind these strips, a winding roll 5| is provided for each strip, said rolls being mounted ‘in any suitable manner for wardly of the puller i2 and each of these rolls is rotated at a speed corresponding to the travel of the strips to wind these strips upon these rolls. over a sprocket on the end of one of the stub shafts 31 of one of the bucket wheels, and a sec Each of these. roll shafts is rotated at the proper ‘ ond sprocket chain 44 transmits motion from the stub shaft of the ?rst wheel to the shafts 3'! of over a sprocket on the end of the shaft of the roll 30, and as the long sprocket chain 3| serves to drive the roll 29 to move the strips at the proper speed, and as the roll. 30 is connected to turn the other bucket wheels so that rotation of the several bucket wheels is continuous and serves 45 to thoroughly agitate the acid within the tank. At the same time these bucket wheels serve to elevate the acid and discharge it into the troughs 4| through the cups 42, imparting momentum to the flow in each trough so that this acid will 50 be discharged through the slot 4|a in the bot . tom of each trough ‘with sufficient momentum to . flow across the upper surface ofthe strips and tend to loosen the scale on this surface and wash it away. The lower surfaces of these strips are 55 also directly contacted by the acid which ?lls the tray and over?ows into'the tank beneath, main taining the level of acid in the tray at a height to contact said strip, and which acid is thorough ly and continuously agitated by the ?ow from v60 the troughs, tending to wash away the scale from the lower surface of the strips. With this ar rangement the acid bath is thoroughly agitated and stirred and every part of each of the strips is subjected to its action and all scale is com-' pletely removed due to such contact and also to the direction and force with which the acid is presented to the upper surface of the strips. speed by means of a sprocket chain 58 running 40 with the roll 29, the rolls 5| will all be rotated at 45 a speed corresponding to the movement of the several strips and. these strips will‘be properly wound upon said rolls. The acid bath instrumentality 8 embodying the present invention is therefore particularly 50 adapted to be included in the, line of instrumen talities, and with this arrangement, a plurality of strips or ribbons of thin sheet metal may be si multaneously annealed and treated to produce a ?nished product, and each strip inay be added to 55 inde?nitely extend its length and provide a con- tinuous process. \ Having thus fully described my invention what I claim is: _ J , 1. Means for subjecting a long’strip of ‘thin metal to an acid bath during the process ‘of treating and annealing said strip while travelling in a long horizontal run, said acid applying means including’ an acid tank across which said run extends and acid agitating and elevating means in said tank for stirring said acid and raising it above the horizontal plane of said run and dis This acid applying instrumentalityuindicated , charging it downwardly with a continuous ?ow as a whole by the numeral 8, is particularly xinto impingement with said strip. 2. Means, as characterized in claim 1, and fur 70 v70 adapted by reason of its construction to be con nected in the series of treating instrumentalities ther characterized in that said agitating and elevating means includes a rotary member hav and form a part of the continuous /treating sys tem. After being subjected to the acid bath, the in__g__peripheral buckets, and means above the several strips being treated are then passed hori -horizontal plane of said run. of said strip for .76 zontally over washers for washing away the acid receiving acid from said buckets and discharg 75 3 2,135,718 ing it downwardly into impingement with said ' run of said strip. ' . 3. Means as characterized in claim 1 and in I eluding a tray above said tank and ‘across which 6. Means for subjecting a long strip of thin metal to an acid bath during the process of treat ing said strip while travelling in a horizontal run, said acid applying means including an acid tray said run extends and into which tray acid tank across which said run of said strip extends, 5 is elevated from said tank, said elevating means an acid agitating and elevating means in said including a member arranged to pick up. acid tank comprising a plurality of rotative members, from said tank and discharge the same down - ‘each having radially extending peripheral buck- ‘ wardly into impingement with the upper sur ets withthe inner end of each bucket open and 10 face 01.’ said strip. ~ , positioned outwardly from the axis of said mem ‘ber to provide a space between the inner ends of . 4. Means as characterized in claim 1, and in cluding a tray above said tank and across which said buckets, a horizontally disposed trough ex tray said run extends, and a trough extending tending from each rotative member and pro across said tray above said run and having a 15 discharge opening in its lower side, said elevat ing means comprising‘ a rotary member having peripheral buckets arranged to dip into the acid in ‘said tank and discharge the same into said trough. 20 , 5. Means as characterized in claim 1, and in cluding a shallow tray above said tank and across which tray said run extends, said elevating means comprising a rotary bucket wheel at one side of said tray to dip into the acid in said tank' and. elevate the same to a level above said tray, a‘ trough extending across said tray above said vided with an upwardly open cup at the end of said trough within the axial space of said rota 15 tive member between the inner ends of said buckets to receive ‘acid elevated from said tank by said buckets and discharged into said cups, each of said troughs having an opening in its lower side above said run of said material, each 20 of said troughs extending transversely of said run above the same and spaced therefrom to dis charge acid upon the-upper surface of said run, a tray supported by said tank above’the level ofv acid in said tank, said troughs extendingacross run and opposite said wheel and having an‘ end and above the level of acid in said tray, and means cup into which said wheel discharges, said trough having a longitudinal discharge slot in its lower :for rotating said members carrying said buckets. 30 side, and means for rotating said bucket wheel. » CLIFFORD B. HIGGINS.