US2556149A

US2556149A - Apparatus for coiling strip material

Info

Publication number: US2556149A
Application number: US781690A
Authority: US
Inventors: Howard H Talbot
Original assignee: United Engineering and Foundry Co
Current assignee: United Engineering and Foundry Co
Priority date: 1947-10-23
Filing date: 1947-10-23
Publication date: 1951-06-05
Anticipated expiration: 1968-06-05

Description

June 5, 1951 H. H. TALBOT APPARATUSFOR comm STRIP MATERIAL .2 Sheets-Sheet 1 Filed Oct. 23, 1947 INVENTOR Howard H. ulbot v26 ATT CRNEY June 5, 195] H.'H. TALBOT 2,556,149

APPARATUS FOR comma STRIP MATERIAL Howard H. Tulbot BY/QZ ATTORNEY Patented June 5, 1951 APPARATUS FOR COILING STRIP MATERIAL Howard H. Talbot, Pittsburgh, Pa., assignor to United Engineering & Foundry Company, Pittsburgh, Pa., a corporation of Pennsylvania Application October 23, 1947, Serial No. 781,690

2 Claims. 1

This invention relates to an apparatus for coiling strip material and, in particular, to the coiling of continuous strip metal under conditions of high tension at the discharge side of a cold mill or the like.

In the coiling of strip metal, particularly where high tensions are involved, it is well known that very severe forces are built up as the number of convolutions increase on the reel. By reason of the fact that the total force is an accumulation of the individual forces caused by the contractive effort of each layer of metal strip, the direction in which the force acts is radially towards the reel. Due to the magnitude of the total force, failure of many of the reel parts,

particularly of those elements which assist in the expansion and contraction of the reel, takes place. In order to prevent such failures, the only method advanced, up to the present time, is to provide a reel of sufiicient size which will withstand the intensive forces to be imposed thereon. It will be appreciated that such a solution to the problem is inadequate for as the size of coil to be formed governs the size of the reel to be used, the reel will reach such proportions as to require considerable space for the installation thereof, be cumbersome in operation, and be expensive to manufacture as well as costly to maintain.

As will be more fully described hereinafter,

the method as Well as the apparatus for coiling It is another object of this invention to provide apparatus for readily coiling strip metal as it issues from a mill and from which the completed coil can be readily removed for further processing.

A further object of this invention is to provide a most effective apparatus for coiling strip material in the practice and use of which expense of mill operation may be reduced to a minimum. w

These, as well as the various other objects, advantages and novel features of this invention will become apparent from the following description and accompanying drawings of which:

Figure l is a side elevation sectional view of an adjustable expanding reel embodying the features of the invention herein disclosed taken at I--I of Figure 2;

Figure 2 is an end elevation view of an ad justable expanding reel in the expanded position;

Figure 3 is a sectional view taken at III-III of Figure 1;

Figure 4 is a sectional view similar to Figure 3 but of the reel in the collapsed position, and

Figure 5 is a view of the hydraulic arrange inent employed for expanding and collapsing the reel.

With reference to the drawings, Figure 1 through 4, the expandable reel driven by a motor or the like, not shown, comprises an I elongated shaft ll cut away at one side thereof to provide a recess [2, within which a floating reciprocable member I 3 and segmental radially movable arcuate elements M are supported, and having an axially extending opening [5 within 1 which a rotatable strip-end gripping member I6 tinues to support the weight of the metal coil,

is contained. Arcuate elements I4 are of the same radius as the curved surface portion I! of the shaft H so that when the reel is expanded, the arcuate elements together with the curved surface portion I! will form substantially a cylindrical surface upon which strip material may be formed into a coil 20.

Shaft ii is provided with a necked-down or journaled portion l8 received within and supported for rotation by a suitable bearing l9. Adjacent to the bearing end of shaft H and forming an integral part thereof is a hub 2| having a cylindrical recess 22 therein within which a piston 23 is confined for reciprocation axially of the reel. Integral with and extend ing perpendicularly outward from shaft II is a circular lip 24 having a cylindrical opening 25 within which a gland 26 is received and secured to theshaft H at the lip 24 bystuds 26c which pass through the end or face plate 21 of the gland. A piston 28, adapted to be reciprocated axially of the reel, is located at the outward end of the reel within cylindrical opening 29 of the gland 26. Suitable packing 3| and 32 is secured to

pistons

23 and 28 at the pressure ends thereof by means of retaining

plates

33 and 34 respectively attached to the pistons by studs 35.

The arcuate elements 14 are loosely supported on shaft II by a closed ring 36 at the inboard end and by a U-shaped member 31 at the outboard end thereof, ring 36 being received within groove 38 of the shaft I! and grooves 39 of the arcuate elements [4 andU-shaped member 31 secured to the shaft by hook-shaped ends 4| fitted into holes 42 of the shaft and received within grooves 43 of the elements I 4; rality of guides 40, aflixed to member I3 and overlapping arcuate elements l4 at their points of juncture, insure that the member l3 and elements I4 will remain in their relative positions during expansion and collapse of the reel.

On the inner portion and extending length- .wise of each of the arcuate elements l4 are formed a row of wedges 44 which are inclined at the same angle as the groups of similar wedges 45, with which they make frictional contact, formed on the surfaces of the reciprocable reelexpanding member I 3 as shown in the Figs. 1 and 3. A bearing plate 46 is secured to the shaft ll along which the member !3 slides as it is reciprocated to and from the reel expanding position. Extending lengthwise of the shaft 1 I is a slot into which the leading end of strip to be coiled is received and strip-gripping member l6 rotated so that the enlarged cam surface 48 thereof makes contact with and locks the strip end within the slot to prevent accidental iwithdrawal therefrom during the coiling operaion. 7

For reciprocating piston 23 to cause the reel to expand, the hydraulic system therefore, as shown on Figure 5, comprises a stationary sleeve mounted on the shaft II by means of bearings 52 so that the shaft can be rotated relative to the sleeve, having an opening 53 extending therethrough communicating with a chamber 54 encircling the inner surface of the sleeve and a hydraulic inlet pipe 55 secured to the sleeve by flange 56 which carries fluid to the piston 23 through the sleeve 5! and an opening 51 in the shaft. A manually operable valve 58 and adjustable pressure relief valve 59 are interposed in the hydraulic line between the sleeve 51 and the source of hydraulic power, not shown. Two sealing rings 6! are attached to the sleeve at the inboard and outboard side by studs 62 and the assembly maintained in position by end plate 63 fastened to the end of shaft H by studs 64. The hydraulic system for providing axial movement of piston 28 comprises a pipe 65 secured to sleeve 5! by a flange 66, with a manually controllable valve 61 interposed in the line between the sleeve and source of hydraulic fluid, not shown, and opening 68 through the sleeve 5| communicating with the pipe 65 and a chamber 69 encircling the inner surface of the sleeve 5| which, in turn, communicates with an opening H formed in the shaft ll extending lengthwise thereof to a transverse passage !2 entering the chamber of piston 28. A second bearing lea, similar to bearing l9 and spaced therefrom, supports the shaft portion 18a adjacent to the hydraulic system. Though not specifically illustrated, as it is decmfid unnecessary to do so, any satisfactory means such as a gear keyed to that portion of the shaft between the two bearings 19 and [9a which meshes with a gear mounted on the shaft of a driving motor may be employed for rotating the reel.

Operation of my improved reel in the coiling of continuous strip material under conditions of high tension is essentially as follows:

The reel is expanded by opening valve 58 to admit fluid to the cylindrical recess 22 for moving piston 23 axially of the reel, thus causing member [3 to move toward the outboard end of the reel so that the arcuate elements Hi, the wedges 44 of which are in communication with wedges 45 of member 13, are directed radially outward to the fully expanded position of the reel. Relief valve 59 is pre-set to withstand the desired back pressure which may be imposed on the hydraulic system by forces encountered by the reel during coiling. The leading end of the strip after it has been passed through a mill or the like, where high coiling tensions are essential, is placed in the slot 41 of the reel and stripgripping member [6 rotated by means of a hand crank or the like to bring the cam surface 48 thereof into communication with the strip to lock it in place and prevent slipping thereof during coiling.

'The'reel is slowl rotated by the power means connected thereto to insure that the first few wraps of material are placed properly on the reel and then, depending upon the speed of the mill, rotated at the speed desired to maintain the desired tension. As the number of convolutions of strip is increased upon the reel, the inwardly directed forces imposed upon the reel increase due to the contractive effort of each layer of material. The relief valve 59, pre-set to withstand pressures equal to those which will be encountered as soon as the coil becomes selfsustaining, will slowly open to permit the escape of fluid trapped in the cylindrical recess 22 at the pressure end of piston 23 so that the reelexpanding member l3 will move toward the inboard end of the reel to cause the arcuate elements [4 to be directed radially inward, thus partially collapsing the reel.

. the forces normally directed upon the reel are transferred to the coil itself and the only forces imposed upon the reel are those incident to the weight of the coil and the torque produced by the strip tension. Since the partial collapse of the reel takes place automatically, rotation thereof and coiling of the strip are not interrupted.

As soon as the coil of the desired size is formed, the reel is entirely collapsed by opening valve 58 to the exhaust and adjusting valve 61 to admit fluid to the cylindrical opening 29 so that piston 28 moves axially of the reel to cause member IE to return to its original position. Thus, arcuate elements 14 are permitted to move inwardly to their. complete reel-collapsing position and, after the strip-gripping member i6 is released, the completed coil is withdrawn from the reel.

In accordance with the provisions of the patent statutes, I have explained the principle and operation of my invention and have illustrated and described what I consider to represent the best embodiment thereof. However, I desire to have it understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically illustrated and described.

In this manner,

I claim:

1. Apparatus for coiling strip material com-- prising a shaft, a plurality of arcuate members angularly disposed with respect to one another supported by said shaft, a floating reciprocable member, provided with a piston at either end thereof, disposed between said shaft and said arcuate members adapted to cooperate with and extend said members radially substantially to form a cylindrical surface together with a por-- tion of the surface of said shaft, separate fluid connections for each of said pistons through which fluid under pressure may be admitted for reciprocating said floating member axially, and an adjustable relief valve in one of said fluid connections for limiting the maximum back pressure imposed upon one of said pistons opposing collapse of said reel.

2, Apparatus for coiling strip material comprising a shaft, a plurality of arcuate members angularly disposed with respect to one another supported by said shaft, a floating reciprocable member provided with a piston at either end thereof disposed between said shaft and said 6 arcuate members adapted to cooperate with and extend said arcuate members radially substantially to form a cylindrical surface together with a portion of the surface of said shaft, separate fluid connections for each of said pistons through which fluid under pressure may be admitted for reciprocating said floating member axially, an adjustable relief valve in one of said fluid connections for limiting the maximum back pressure imposed upon one of said pistons opposing the reel collapsing forces incident to the polling of strip material upon said reel, and releasable gripping means for securing to said reel the end of a strip to be coiled.

HOWARD H. TALBOT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,202,563 Mikaelson May 28, 1940 2,271,139 Holdgate et al Jan. 27, 1942