US2097636A - Cutting device - Google Patents

Description

Nov. 2, 1937. c. E. MOORE CUTTING DEVICE 5 Sheets-Sheet 1 Filed Dec. 30, 1935 Nov. 2, '1937. E. MOORE CUTTING DEVICE Filed Dec. 50, 1935 s Sheets-Sheet 2 [Wei J02:

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Patented Nov, 2, 1937 2,097,536 CUTTING DEVICE Carl E. Moore, Gary, Ind., assignor to American Sheet and Tin Plate Company, a corporation of New Jersey Application December 30, 1935, Serial No. 56,800

2 Claims. .(Cl. 164-61) This invention relates to cutting devices and more particularly those which are adapted for the longitudinal cutting of continuous strip material; such as sheet metal, although not limited thereto.

In the manufacture of strip metals, it has long been the practice to manufacture the material in continuous form and of substantial width; after which it is longitudinally cut by'oppositely spaced rotary shears. According to this mode of operation, it is difficult to maintain the opposite edges of the work-piece in parallelism; and this condition is particularly manifest when handling wide and extremely thin material (for example: 36 inch -33 gage metal). Whenthe metal is of such width, and wider,'and of such light gage, or even lighter, it has a great tendency to ripple, or corrugate as it approaches the rotary shears/and also to cross-buckle therebetween. This condition, of course, results in uneven cutting often to such an extent as to render the material entirely unfit for the purpose for which it was intended.

It is among the objects of the present invention to provide a novel cutting device which at all times effects the longitudinal and even cutting of continuous material which is moving.

Another object is the provision of a device of the class described which will maintain the workpiece in a fiat and rigid condition, and thereby effect an accurate result.

The foregoing and other objects will be apparent after referring to the drawings in which:

Figure 1 is a side view taken from the inlet end of the apparatus of the invention.

Figure 2 is a sectional view on the line II-II of Figure 1.

Figure 3 is a fragmentary end view showing part of the apparatus.

Figure 4 is an enlarged detail.

Referring more particularly to the drawings, the numeral 2 designates a pair of housings in which there isnnounted a vertically-adjustable shaft 3 which carries a pair ofspaced-apart conventional rotary shear elements 4. A shaft 5 is mounted in the housings 2 immediately below the vertically-adjustable shaft 3 and carries a pair of spaced-apart conventional rotary shear elements 6 which cooperate with the elements 4. The shafts 3 and 5 are driven in any suitable manner (not shown). A pair of vertically inclined frames 8 are secured to one side of the housings 2 and carry a pair of rotatable shafts 9 and I0, each of which has secured thereto a pinch-roll, as at l2, and I3, respectively.

The shaft Ifl'carries an outboard extension I5 on which there is mounted a sprocket I6. The sprocket I6 is dtiven through a chain I! from a sprocket I8 on a suitably driven shaft I9 which is journaled in the housings 2. If desired, this shaft I9 may also be utilized to drive the shafts 3 and 5 on which the rotary shear elements 4 and 6 are mounted, although such an arrangement is not disclosed, as previously pointed out. On the other side of the machine, the shafts 9 and III on which the pinch-rolls I2 and I3 are mounted carry sprockets and 2|, respectively. These sprockets 20 and 2I are connected by a chain 22 in which there is mounted an idler sprocket 23, the latter being secured to the top of the adjacent 15 vertically inclined frame 8.

A horizontal bar 25 is secured to the side of the housings 2 between the shaft III which carries the pinch-roll I3 and the shaft 5 on which the rotary shear elements 6 are mounted. A similar horizontal bar 26 issecured to the opposite side of the housings 2 at a higher elevation. The bars 25 and 26 carry a plurality of angular strips 21 I which are provided with collars 28 on their ends.

These angular strips 21 extend upwardly from the horizontal bar 25 to the line of pass of the rotary shear elements 4 and 6; and horizontally to the bar 26. These angular strips 21 act as guides and are therefore covered with suitable material 30 to prevent their scratching the workpieces.

A horizontal bar 32 is supported on the housings 2 above the bar 25 by brackets 33 and secured against rotation by set-screws 34. This bar 32 carries a plurality of inverted V-shaped brackets 36 which are clamped thereto, as at 31. The lower ends of the legs of these V-shaped brackets are connected by angular strips 39. Each of these angular strips 39 carries acollar 40 which engages a horizontal bar M the latter being connected between the housings 2 in the manner of the bar 25, although at a somewhat higher elevation. The angular strips 39 are so constructed and arranged that (when the inverted V-shaped brackets 36 are in position) they will extend upwardly in parallelism with the upwardly extending portions of the angular strips 21 and also parallel a short length of the horizontal portions of the latter. These angular strips 39 are disposed immediately over the angular strips 21 and are alsocovered with the material 30.

A table is disposed adjacent the pinch rolls I2 and I3 at an elevation which is in line with the line of pass of the latter. This table carries 5 scratching the work-pieces. By way of example, these strips may be formed of felt, fibre, or the like.

In operation, the work-piece, or material to be cut, X is moved along the table 50, through the pinch rolls l2 and I3, between the angular strips 21 and 39, and between the rotary shear elements 4 and 6 and horizontally out of apparatus to a suitable processing machine which acts to draw it forwardly. As the processing machine (not shown) or other device, draws the work-piece forwardly, the shaft I9 is driven and the longitudinal cutting operation performed.

During the upward feeding of the work-piece it is rigidly held against transverse-corrugating tendencies. As the work-piece approaches the rotary shear elements 4- and 6, it is arced longitudinally (as shown between the lines AB in Figure 4). The radius of this arc is substantially that of the lower rotary shear element 6. According to the teaching of the invention, the work-piece must be held transversely rigid from edge-to-edge at the line of cutting. Due to this are the work-piece may be effectively out along 2,097,636 a plurality of strips 5| which are incapable of either or both edges without the deleterious results previously referred to.

While I have shown and described one specific embodiment of my invention, it will be understood that I do not wish to be limited exactly thereto, since various modifications may be made without departing from the scope of my invention, as defined in the following claims.

I claim:

1. Apparatus for cutting a moving sheet comprising'sheet feeding means, at least one rotary shear, and a guide in advance of said shear, said guide being spaced from said shear and constructed and arranged to impart a longitudinally

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