US597756A - Machine for swaging wire - Google Patents

Description

(No Model) 3 Sheets-Sheet 1.

W. G. ALLEN. MACHINE FOR SWAGING WIRE. No. 597,756. A Patented Jan. 25, .1898.

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W. G. ALLEN.

MACHINE FOR SWAGING WIRE.

No. 597,756. Patented Jan. 25,1898.

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. W. G. ALLEN, MACHINE YFOR SWAGING WIRE. No. 597,756. Patented Jan. 25, 1898t p PATENT FFICE.

YVILLIAM G. ALLEN, OF HARTFORD, CONNECTICUT.

MACHINE FOR S'WAGING WIRE.

SPECIFICATION forming part of Letters Patent No. 597,756, dated January 25, 1898.

Application led July 29, 1897. Serial No. 646,280. (No model.)

To @ZZ whom may concern:

Be it known that I, WILLIAM G. ALLEN, of Hartford, Connecticut, have invented a new and useful Improvement in Machines for Swaging Wrire, which improvement is fully set forth in the following specification.

The object of this invention is to increase the durability and efliciency of machines for swaging Wire-such, for example, as machines for making Wire spokes.

In sWaging-machines the rapid and violent strokes on the dies quickly produce Wear and damage to various parts of the mechanism. This Wear and damage are found to be greatestat the time when there is no stock between the dies, at which time the latter are loose and the strokes of the driving-cam cause great concussion and rapid injury.

'The present invention includes means whereby the dies are automatically moved and held out of contact With the driving-cam while they are not acting upon the stock. Thus the Wear is confined to thetime when the dies are actually operating on the stock and when the Wear is at a minimum.

It has been found that the chucks ordinarily used in machines of this description do not grip the slender` wire as tightly as is necessary to prevent all slip and insure proper action. The invention embraces an improved chuck which accomplishes this result and vis attended With other advantages, as will be fully set forth.

The several features ofmy invention will be best understood by reference to the accompanying d1a\vings,\vherein is illustrated What has been found to be a practically-successful embodiment thereof in a sWaging-machine, and Wherein-- Figure l is a plan View. Fig. 2 is an eleration from the right of Fig. l of a portion of the machine. Fig. 3 is a plan of Fig. 2, parts being omitted to show the locking device for the carriage or slide. Fig. llis a detail of the bracket, in which the latch for locking thecarriage is pivoted. Fig. 5 is a longitudinal vertical section through the chuck for holding the Wire during the swaging operation. Fig. 6 is a longitudinal horizontal section of the same. Fig. 7 is an end lview of the chuck, looking from the left of Fig. 5. Fig. 8 is an end view of the chuck- George J. Capewell and myself onu the 30th day of June, 1896.

Referring to the drawings, A2 represents the main driving-shaft, K the bed of the machine, and K a frame in which the parts of the swaging mechanism are mounted, said frame being supported by the bed.

R and G4 are shafts for operating the two dies of the swaging mechanism, respectively.

g is the vibratory die of the swaging mechanism, carried by slide g and receiving its rapid vibratory movement from a large rotating cam-Wheel G of the construction described in the patent referred to.

72, is the adjustable or anvil die, carried by a slide h and moved to adjust its position by means of cam-wheel I-I on shaft R'.

As thus far described the parts are the same as corresponding-parts of the patented machine. 'lhe means whereby the dies are automatically moved and held out of contact with the driving-cam G While not acting upon the stock, constituting one of the features of my presentpinvention, will now be described.

c is a lug or projection on the upper face of slide g', extending into the under side of a recessed bridge-piece V, overhanging the y slide. top of the bridge-piece V, and adjustable stopbolts o2 pass through the sides of the bridgepiece into the interior thereof and act to limit the movement of slide g in either direction by engagement With projection c.

A rocking lever IV, pivoted at it', carries at one end a friction-Wheel 1o', bearing aga-inst a cam-Wheel W on the side of cam-Wheel H, and at its other end an adjustable Wedge to2,

An opening o' is provided through the projecting through the opening o' in the top of bridge-piece V and adapted to engage the projection o. Vheel w is held in contact with cam W by means of a springing, pressing against the top of the lever. In operation when a wire spoke or similar article is being operated upon bythe dies the Wheel w' IOO rests against the shallow part of cam VV; but as soon as the operation is completed and the work withdrawn from between the dies the elevated portion of the cam comes into operation, tilting lever lVaud lowering wed ge 102 into engagement with projection r1;,whereby slide g is held forward out of position for engagement of cam-wheel G therewith and thereby preventing injury and wear o-n the faces of the dies, as already explained. This position of the parts is maintained until wheel w drops off the elevated portion of the cam, when a new length of stock is introduced between the dies and the swaging proceeds.

Coming now to the improved chuck for gripping and drawing the stock between the swagingdies, L represents a slide or carriage mounted in suitable ways on base-plate K and adapted to be moved longitudinally by lever L', pivoted at L3 to an adjustable frame S and operated by a cam-groove in the periphery of a drum L2 on shaft A2. The end of said lever engages over stud Z on the carriage. Hollow spindle or sleeve M is mounted in bearings M2 M2 on the carriage and rotated by means of pulley M3, said bearings having bushings M4 M4. At one end spindle M is exteriorly screw-threaded for engage-V ment witha set-nutm and interiorly threaded for engagement of a plug on', which latter is centrally perforated, forming a bearing fora plunger m2, having a head on its inner end against which presses a coiled spring m3, said spring bearing at its other end against a disk m4, secured in the sleeve M.

'n n are the jaws of the chuck, pivoted at n' between the forked extensions N of sleeve M and arranged to be operated from a bar O, sliding in sleeve M, by means of a toggle connection consisting of links o o, pivoted on opposite sides ofthe free ends of jaws n n 'and to ears o o on opposite sides of the pro-v jecting end of bar O, as shown, said ears being formed by a link passing through and projecting from opposite sides of an opening through the squared end of the bar.

n2 is a guide secured to the ends'of extensions N N. l

In the position indicated in Fig. 5 the jaws of the chuck are closed as in the act of gripping the stock, the links o 0 of the toggle connection assuming a vertical position. vThe opening of the jaws for the purpose of releasing the stock is effected by a longitudinal movement of the bar O, (to the left in Fig. 5,) whereby the upper ends of the jaws are drawn toward each other, as will be clearly understood, and the gripping-faces of the jaws moved farther away from each other. The longitudinal movelnent of the bar O for the purpose here referred to is effected by a cam-groove p in the periphery of a Wheel P on shaft R by connections which I will now describe.

Q is a collar sliding on sleeve M andA having a pin q, passing through longitudinal `wheel P by the means described.

slots in the sleeve and fitting tightly in a transverse opening in bar O. Collar Q has a peripheral groove q', into which projects a pin r on a lever R, pivoted at one side of the carriage and having its free end extended into the path of suitable stops hereinafter referred to. On its under side lever R has a tooth r', (see Figs. l and 6,) adapted to be engaged by a spring-catch r2 to hold the chu ck -j aws either in an 'open or a closed position.

T is a'rod mounted to have a limited sliding movement in bearings t ton frame KQ said reciprocation being i mparted to the rod by a lever T', pivot'ed at t', engaging at one end between fixed collars on the rod and at its other end carrying a pin projecting into the cam-groove p offwheel P.

i2 and t3 are stops on rod T in they path of lever B., stop t2 for effectingthe closure of the chuck-jaws being fixed, and stop i2 for effecting the opening of the chuck-jaws being adjust-able onthe rod by engagement with a screw-thread formed thereon, the point at which it is desired to open the chuck to release the stock being dependent upon the length of the stock, which may be variable.

The closing of the jaws against the stock is effected by a quick jerky movement translnitted thereto from an offset in groove p of It is of importance that the carriage at this time be held in an absolutely-iixed position7 as any slight movement `thereof may have the effect of causing too short a grip being taken on lthe stock. To prevent this, means are provided for momentarily locking the carriage, such means consisting of a latch U, pivoted at n to a bracket U', adjustably secured to frame K. The latch has at one end a roller u', held in contact with the periphery of a disk U2 on shaft R through the action of a spring u2. Disk U2 has adepression its in its peripheral surface, into which the roller u drops during the rotation of the disk, thereby lowering the free end of lever U into engagement with a recess n4, formed in the edge of a block n.5, secured to the carriage, thereby locking the latter so long as the roller runs in the depression.

Referring now to the means for ejecting the work from the chuck afterthe swaging has been completed, '.ris arod extending from plunger 'm2, Fig. 5, at one end of sleeve lll, through spring m2, a perforation in disk m4, a longitudinal central opening through bar O and parts associated therewith, its free end terminating (in the normal position of the rod) close to the chuck-jaws.

Y is an overhan ging support on carriage L, to the outer end of which is pivoted an arm y, the free end of which extends to a position in front of the projecting end of plunger m2. The swinging movement of arm y is limited by a stop y', secured to support Y.

z is a stop of rod T, adapted to make contact with arm y as the carriage reaches the limit of its travel, causing the arm to press IIO izo

the plunger inward against the tension of spring m3, sliding rod forward, so that its outer end passes between the chuck-jaws and ejects the work. In its position of rest the forward end of rod c acts as an adjustable stop to determine the length of stock introduced between the chuck jaws, the adjustment being effected by screwing the plug -m/ in or out.

The operation of the machine is as follows: A length of stock to be swaged is passed between the swaging-dies and between the jaws n n of the chuck until its end abuts against the end of rod which has been adjusted to the proper position in accordance with the length of the stock, as already described. At this instant,the carriage being locked by latch U, an odset in groove p of wheel P imparts a quick movement to lever T', reciprocating bar T and swinging lever R to the right, Fig. l, moving bar O in a corresponding direction and closing the jaws tightly against the stock, in which position spring-catch r2 rests on the left-hand side of tooth tr"on lever R, Fig. l. The roller w' now drops into the shallow part of cam YV', lifting wedge w2 out of engagement with projection o and permitting camwheel Gto vibrate slide g'. At the same time latch U is lifted out of engagement with slot fri-Sand the movement of the carriage by camwheell'andleverLcommences. Thismovement of the carriage continues until lever R arrives in front of stop t3, at which instant a second oset in groove p of wheel P comes into operation to quickly reciprocate rod T 'to the left, operating the parts to open the chuck-jaws, as will be clearly understood. At about the same time lever y strikes against stop s, imparting a longitudinal movement to rod a: and ejecting the finished article, which at this time rests loosely between the open jaws. The return movement of the carriage now begins, the chuck-jaws being held open by spring catch r2, engaging on the right-hand side of tooth fr'.

Having thus described my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

l. In a swaging-machine, the combination with the dies, and a driving-cam for imparting a vibratory movement to one of the dies, of means for automatically moving the vibratory die to, and positively holding itin, an inoperative position with reference to the driving-cam, substantially as described.

2. In a swaging-machine, the combination with the dies, a slide on which one of the dies is mounted, and 'a driving-cam for imparting a vibratory movement to said slide, a projection on the slide, a rocking lever, a chuck or projection on said lever, and means tor automatically rocking the lever to engage the chuck with the projection on the slide for moving and holding the latter out of operative relation with the driving-cam during periods when there is no stock between the dies,

substantially as described.

3. In a chuck,the combination with a sleeve, chuck-jaws pivoted at one end of said sleeve, a bar sliding in the sleeve, toggle-joints connecting the free ends of the chuck-jaws with the bar, and means for reciprocating the bar, substantially as described.

4. In a rotary chuck the combination with a sleeve, of a bar sliding in said sleeve, jaws pivoted to the end of the sleeve and extending to positions about the end of the bar, pivoted links connecting the end of the bar to the jaws forming toggle-joints, and means for imparting a longitudinal sliding movement to the bar to open and close the jaws, substantially as described.

5. The combination with a longitudinallymovable carriage and means for moving the same, of chuck-jaws movableon the carriage,` means for operating the chuck-jaws to grip and release the stock, an adjustable stop for the stock in the rear of the jaws, and means for automatically moving said stop at a predetermined point in the travel of the carriage to eject the stock from between the jaws, substantially as described.

6. The combination with a longitudinallymovable carriage and means for moving the same, a sleeve mounted in bearings on the carriage, means for rotating the sleeve, chuckjaws pivoted to one end of the sleeve, a bar sliding in the sleeve and connected at its outer end to the chuck-jaws by suitable togglejoints, means for reciprocating the bar to open and close the jaws, a plug in the other end of the sleeve, a plunger sliding in and projecting from an opening'through the plug, a spring pressing against the inner end of the plunger, a rod secured at one end to the plunger and extending through a central perforation in the chuck-operating bar, terminating at'a point in proximity to the chuck-jaws and acting as a stop for the stock fed thereto, and means for automatically reciprocating the plunger and rod at a predetermined point in the travel of the carriage-whereby the latter acts as an ejector for discharging the stock from the chuck, substantially as described.

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

WILLIAM G. ALLEN'.

Witnesses Lnwis SPERRY, EMELYN PETHERBRIDGE.

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