USRE20000E - Apparatus and process for uncoiling - Google Patents

Description

June 9, 1936. w. H. HOFER Re. 20,000 APPARATUS AND PROCESS FOR UNGOILING COILED. SHEETMETAL Oriszinal Filed Dec. 19, 1952 2 Sheets-Sheet 1 X a I l 25 Fxqz INVENTOR by BY ATTORNEY 9, 1936. HOFER Re. 20,000

APPARATUS AND PROCESS FOR UNCOILING COILED SHEET METAL Original Filed Dec. 10, 1932 2 Sheets-Sheet 2 INVENTOR v WMQMW W ATTORNEY Reissued June 9, 1936 UNITED STATES PATENT OFFICE APPARATUS AND ,PBOCESS FOR UNCOILING COILE'D SHEET METAL William H. Hofer, Middletown. Ohio, assignor to The American Bolling Mill Company, Middletown, Ohio, a corporation of Ohio Original No. 2,020,889, dated-November 12, 1935,

Serlal- No. 846,660, December 10, 1932.

Application for reissue March 10, 1936, Serial No.

The general method heretofore practiced for uncoiling coils of sheet metal has comprised the placing of the 'coil in a cradle of idler rollers, engaging the end of the metal andpulling the metal away from the coil substantially in a tangential manner, the coil being rotated in its cradle by the pull of the metal as it is being withdrawn. Such apparatus and method hasbeen productive of the difilculty known as coiler breaks. Coil breaks are changes in the physical characteristics of the metal produced by a sharp bend therein. While the bend itself may be removed by subsequent roller leveling, the physical condition brought about by this excessive working of the metal persists in the piece through subsequent operations, such as cold rolling and the like, and

has, in the past, been a major source'of rejections.

It is an object of my invention to provide a decoiling apparatus which will not be productive of coiler breaks, and in which the metal may be decoiled smoothly'and evenly. In the prior art practices which I have described, coiler breaks occur either through the tendency of the 'heavy metal in the coil to resist the decoiling operation whereby the metal is sharply bent at ornear the coil from a tangential position, or they occur because at times the coil tends to turn more rapidly than the metal is withdrawn therefrom, which causes a sharp bending of the metal at the pinch oils or intermediate the pinch rolls and the coil. In the practice of my invention, I provide means whereby theturningof the coil is regulated and controlled so that the metal may be withdrawn tangentially therefrom in an even .manner.

Hitherto also, due to the irregularity of the with these disadvantages and to provide a mechanism in which the coil may be unwound evenly and in such a way that the housings need not be so greatly interspaced. In'the practice of my invention I have found thatif a coil is t-rued and then guided in such a way that themetal enters the rolls essentially in a direction perpendicular to their axes, the weaving of the metal in the rolls 9 Claims. (017242-78) can greatly-minimized, and the housings can be much more closely interspaced, with a consequent saving in equipment. These and other objects of my invention which will be set forth hereinafter, or will be apparent to one skilled in the art upon reading these speciflcations, I accomplish by that certain construction and arrangement of ,parts of which I shall now describe an exemplary embodiment. Reference is made to the drawings, wherein:

Figure 1 is an elevational view of the entering side of my decoiling apparatus. Fig. 2 is a partial plan view of the apparatus taken along the lines 2, 2 of Fig. 1.

. Fig. 3 is a vertical sectional view through my device.

,Fig. 4 is a partially diagrammatic end elevation.

Briefly, in the practice of my invention, I provide a cradle for the metal coil, and I drive this cradle in such a way as to control the movements 0 of the coil. As I have hereinabove explained, the

coil which'is left free to rotate out of timed relationshlp with the withdrawal of the metal, will tend to produce coiler breaks by producing sharp bends in the metal. In withdrawing the metal substantially tangentially from the coil, if the 'of my invention is the provision of side guiding members located adjacent the cradle, which serve to guide the coil as the metal is being withdrawn therefrom, and which also may be operative to push into position any telescoped portions of the coil, before or during the decoiling operation.

In the several figures I have shown a framework, indicated generally at I, which supports the various mechanism of the .decoiler, indicated generally at 2. A pair of rolls 3 and l serve to support the coiler, and are journaled in bearings! 5', G and B. Shafts on the rolls project through these bearings, and are indicated at land I. They bear keyed sprocket wheels 9 and III, which may be connected by a chain I I so that the concur -i wheel 7 l2 keyed on the shaft 8 and-connected by 55 rolls, as will hereinafter be described. The turn 3 ing of the pinch rolls, which is the agency for withdrawing the metal, will therefore obviously be in timed relationship to the rotation of the Qrolls 3 and I which form the bottom part of my cradle.

Adjacent the rolls, a screw l6, having right and left hand threads, is rotatively mounted upon the framework I below the level of the rolls. Another" by a chain 34. The screw l1 bears a handwheel 2|, whereby both-of the screws may be concurrently rotated.

Two coil guides 22 and 23, essentially vertically dispom ride on the two screws l6 and [1. They are provided with shoes 24, 2'4, 25, and'25', which engage the threads of the screws. A rotation of the handwheel 2| in either direction willserve to bring the guide members 22 and 23 closer together or separate them.v

- 0n the main housings I mount the pinch rolls l5 and I5, as shown. In front of the lower pinch roll. there is a stripper guide 29 which serves.

.tolead the metal into the pinch between the rolls. Below the pinch rolls are rolls 26 and 21, freely Journaled for rotation. These rolls' are metal is withdrawn therefrom. Behind the pinch rolls -l'. have shown sets of leveling rolls, indicated at 32, journ aled in the housing 'the upper set,

as is the'usual practice, being mounted in a sliding bearing.

Fig. 3.show'sa coil of metal 3| at the start of the decoiling operation.- Ordinarily such a coil will be delivered to my device by means of a roller conveyor or the like, not shown, but e'xt'ending to the right of the rolls 3 and 4 in Fig. 3. In operation the guides 22 and 23 are drawn apart by a, rotation of the handwheelZl, and a coil 3| is delivered by the conveyor, or otherwise, until it rests upon the rolls 3 and I. By a rotation of the handwheel 2|, the guides 22 and 23 are brought together so that they will true up the coil, squeeze together any telescoping portions thereof, and center the coil with respect to the decoiling device; .Since these guides are operated by'screws, they are capable of exerting considerable force upon the coil. When the coil has been trued and positioned, the pressure of the guides thereagainst 'is released somewhat, but

the guides are left in such a posltion'that the coil cannot run out of center. J

The coil 3| is then rotated so that the projectpinch rolls l5 and l5. This may be done by hand, but ordinarily proper feeding will be acwith the pinch rolls; the metal will be withdrawn 2 complished in the operation of the machine. If the end of the coil hugs the coil, it willfusually be bent up slightly beforethe coil is placed into position. Under these circumstances, the leading end of the coil will be guided by the stripper guide 29 into the pinch between the rolls l5 and l5. The machine may then be started. As the pinch rolls revolve, the metal is withdrawn from the-coil; but since the cradle rolls 3 and 4 are positively driven and are timed in their operation from the coil 3| m a smooth and even manner, and without the production of coil breaks. As the coil 3| revolves, the side guides 22 and 23 2o,ooo

' a chain I3 to a sprocket II on one of the pinch I rentlyto alter the positions of said guiding means. back-up rolls, against which the coil turns as the I maintain it in a true position, so that the metal. enters the rolls along a,line substantially perpendicular to their axes.

It will be understood that modifications may be'made in my invention without departing from the spirit thereof.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a sheet metal decoiling device, a cradle, oppositely movable guiding means lpcatedso as to engage the ends of the coil mounted on said cradle, and means for bringing ,said guiding means toward each other under pressure, whereby to correct a telescope in said coil.

2..In' a sheet metal decoiling device, housings, pinch rolls mounted in said housings, a cradle disposed below said pinch rolls, upright members spaced transversely of said cradle to serve as centering guides, and'means for concurrently moving said upright members under pressure so as to correct a telescope in a coil, center it, and maintain said coil in centered and telescoped condition.

3. In a sheet metal decoiling device, a framework, pinch rolls and cradle rolls mounted in said framework, screw devices mounted respectively above and below said cradle rolls, and transversely spaced guiding means mounted on said screw means, said screw means adapted concur- 4;- In a sheet metal decoiling device, a framework, pinch rolls and cradle rolls mounted in said framework, screw means mounted essentially.

, means spaced transversely of said cradle so as to-engage the side edges of a coil therein and with J the side edges of the part of the sheet passing from the coil, and means for concurrently moving said guiding means toward or away from each other. i

6. In a sheet meal decoiling device, a cradle comprising spaced rolls for supporting the coil of sheet metal, pinch rolls above the cradle to withdraw the sheet metal tangentially from the coil supported on the cradle rolls, and guides spaced transversely of the cradle and extending from near the opposite, ends of the space between the cradle rolls to the space horizontally opposite the pinch rolls, to preserve the alignment of the convolutions of the coil and of the tangentially'withdrawn portion of the metal from the coil to the pinch rolls.

7. In 'a sheet metal coiling device as set forth in claim 6, an operative connection from the pinch rolls to the cradle rolls whereby the outer convolution of the coil is driven, and the coil roouter convolution equal to the surface travel of the tangentially withdrawn portion of the sheet metal between the pinch rolls.

.tated therewith, with the surface travel of said 8. In a sheet metal decoiling device, a cradle. for a coil, pinch rolls located above said cradle 76 and closely adiacent to a coil which may be mounted thereon, at least a portion of said cradle having a driving relationship with said coil, a driving connection between said pinch rolls and said cradle portion, said pinch rolls adapt-l ed to withdraw metal tangentially from the upper portion ofv said coil, and abutment means for said coil located adjacent said pinch rolls and beneath said metal as it is being withdrawn from 10 said coil.

9. Aflprocess of decoiling metal stock which is subject to coiler breaks, which process comprises withdrawing the metal irom a coil in a substantially tangential direction by engaging the metal close to the coil and rotating said coil in timed relationship with said withdrawal, andmaintaining' the position 'of said coil with respect to said position of engagement during said withdrawal, so as to prevent sharp bending of a the metal, which would produce coiler breaks.

. WILLIAM H. HOFER.

Images