US380950A - Laege forgings - Google Patents

Description

(No Model.) '3 Sheets-Sheet 1.

G. SIDDELL.

APPLIANCE FOR MANIBULATING LARGE PORGINGS. No. 380,950. Patented Apr. 10, 1888.

WITNESSES, I 'INVENTOAS 3 Sheets-Sheet 2.

(No Model.)

G. SIDDELL. APPLIANCE FOR MANIPULATING LARGE FORGINGS. No. 380,950.

Patented Apr. 10, 1888.

(No Model.) a sheets-sheet I G. SIDDELLF APPLIANCE FOR MANIPULATING LARGE FORGINGS. No. 380,950. Patented Apr. 10, 1888.

FIG. 5.

M T/Win56 I w/NV VTM. jA QW UNITED STATES PATENT Orrrcn.

GEORGE SIDDELL, OF SHEFFIELD, COUNTY OF YORK, ENGLAND.

APPLIANCE FOR MANIPULATING LARGE FORGINGS.

SPECIFICATION forming part of Letters Patent No. 380,950, dated April 10, 1888.

Application filed January 4, 1888. Serial No. 259,787. (No model.) Patented in England May 2.0, 1885, No. 6,205.

To all whom it may concern.-

Be it known that I, GEORGE SIDDELL, a subject of the Queen of Great Britain and Ireland,

and residing atRocwood, Orabtree, Pittsmoor, Sheffield, in the county of York, England, have invented a certain new and useful Improved Mechanical Appliances for the Manipulation of Large Forgings, (for which I have obtained a patent in Great Britain, dated May 20, 1885, No. 6,205,) of which the following is a specification.

My invention relates to the manipulation of large and heavy ingots and forgings, such as are usually forged under a hydraulic press or steam-hammer, and has for its object to provide a cheap, portable, and simple mechanical appliance for the manipulation and rotation of heavy ingots or forgings.

By my invention great economy is effected in the manufacture of iron and steel forgings, first, by reducing the amount of manual labor; secondly, by minimizing theloss of time in bringing theheated ingot or forging to the re quired position when under the hydraulic press or steam-hammer, and, thirdly, by increasing the number of furnaces to each hydraulic press or steam-hammer.

Figures 1 and 2 are views at right angles to each other of my mechanical appliance for working large ingots or forgings. Fig. 2 is a side view illustrating a modification of the appliance, and Fig. 3 is a view of another modification.

The appliance shown in the figures is applicable to the rotation of ingots or forgings whether such forgings are in the furnace or are in the hydraulic forging-press or under the steam-hammer.

A is the hydraulic forging press or machine.

B is an endless chain which passes over the wheel 0 and under the ingot or forging D which is being operated upon by the press A. The wheel 0 is held in position by means of the crane-block hook E and shackle or bridle The crane, with the horizontal bar and carriage, is not shownon the drawings.

On the center pin or boss of the wheel 0 is mounted a double or single lever, G, having pawls H, (one only being shown on the drawings,) working on pins. The pawls engage in teeth provided for them on the wheel 0 either inside or out or on the edge of the wheel.

When the endless chain B is slack, the ratchet lever G falls by gravity or is forced in toward the center, so as to crank or bend the chain to any required extent. By raising the wheel 0 the weight of the forging comes on the chain and tends to straighten it. By the act of straightening the lever G is moved, so as to cause the wheel 0 to rotate, by the pawl H engaging in the teeth of the wheel. The rotation of the wheel effects the rotation of the ingot or forging by frictional contact. The extent to which the forging is turned will depend on the relative diameter of the wheel 0 and the forging and the speed of the crane hoisting. To prevent the chain from slipping on the wheel 0, and thus losing the full effect of this automatic motion, the periphery of the wheel should be roughened between the said chain and the wheel; or the periphery of the wheel may be provided with teeth, or checkered, to engage the links ofthe chain. In some cases it is convenient not only to force the ratchet-lever in to the required extent, but to hold it there by means of a bar until the weight of the forging comes onto the chain.

Although it is necessary that there should be friction between the endless chain and wheel, yet it is better to reduce the friction between the lever G and the endless chain, for which purpose a roller may be arranged at the end of the lever G to bear upon the chain.

Instead of operating the lever G automaticall y by the straightening of the chain, as described, it may be worked independently by any convenient means, such as by steam, hydraulic, or other power. For this purpose an eye, I, is provided at the end of the lever for the attachment of the motive power by means of a chain, 1, or the like, as shown in Fig. 2 to work the ratchet and rotate or turn the wheel from an overhead crane. A. convenient way to work the lever is by means of a bar, K, (shown by dotted lines in Fig. 1,) attached to the cross-head or pellet of the press. This bar is so adjusted as to act on the under side ofthe lever G, and can be raised as often as desired to rotate the forging to the required extent, and the advantage of this is that the rotation of the forging cannot be attempted while the tool of the hydraulic press is down and keeps the forging fixed.

WVhen dealing with ingots or forgings of in IOO regular shapesuch as, for instance, a marine crankshaft-it is usual to fix counterbalancingweights on the other side of the porter-bar in a manner well known to forge managers.

It sometimes happens that forgings, however Well balanced originally, are liable to get out of the center and not forged true. quently on being released from the press there is a tendency to overrun. To prevent this overrunning, the wheel C may be provided with a lever or other suitable brake mechanism to check the rotation of the wheel.

In the case of long forgings I prefer to use on the other side of the hydraulic press another crane having a wheel and endless chain constructed in accordance with Figs. 1 and 2.

The ingots or forgings are brought from the furnace to the press, and vice versa, by means of the appliance shown at Figs. 1 and 2, which is carried by an overhead traveling crane.

When taken back to the furnace, one part of the ingot or forging is placed in the furnace and the outer end is supported on Wooden stools or other suitable supports, the endless chain being between the stools or supports and the furnace.

I prefer to have one of my mechanical appliances for each furnace, so that it follows the work and is not removed. All that is necessary is to unhook the shackle F from the hook E, and the crane is then free to move immediately to the next furnace and be there attached to the mechanical appliances, rotate the forging by steam or hydraulic power from the traveling crane, and then proceed in like manner to the next furnace.

Fig. 3 shows the appliance arranged and applied in another manner. The center pin of the wheel 0 is connected with a bar, L, or by other convenient means, to the pellet or crosshead of the press, whereby the wheel 0 and endless chain B are simultaneously raised Oonse when the pellet is lifted. This is employed in combination with the appliance illustrated and is arranged on the other side of the press. This appliance is especially adapted for forging gun-jackets and cylindrical forgings generally. The forgings are carried on a man- 'drel which is supported on standards M.

Although I have shown a lever, G, for rotating the wheel 0, it may be dispensed with, as the principal function of this wheel and chain is merely to raise the mandrel from the supports M to reduce the friction. It is preferred that when the appliance illustrated in Fig. 1 is used in combination with the Wheel 0 and chain B it should not be worked automatically.

I claim for my invention 1. An appliance for the manipulation of large forgings and consisting of a toothed wheel, an endless chain passing around it, and a pivoted lever carrying a pawl or pawls to act on the toothed wheel, substantially as described.

2. An appliance for the manipulation of large forgings and consisting of a toothed wheel, means for raising and lowering it, a chain passing around the wheel and the forging to be manipulated, and a pivoted lever adapted to bear against the chain and having a pawl or pawls to act on the toothed wheel, all substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE SIDDELL.

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THOMAS NEWBY,

31 Thirlwell Road, Heeley, Shefiield. HENRY MERRILL, 51 Fitzwillz'mn Street, Sheflield.

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