US293348A - Bolt or rivet machine - Google Patents

Description

(No Model.) y

' J. MORGAN.

BOLT 0R RIVBT MACHINE.

l 4Patented"Fabl 12, 1&884.

ilnirno @raras PATENT I @Brione JAMES MORGAN, OF PITTSBURG, PENNSYLVANIA.

, 'BoLToR'RwETMAcr-HNE.

SPECIFICATION forming part of Letters Patent No. 293,348, dated February 12,1884. Application inea May 1 4, iets. (No model.)

To allnuhom it may concern:

Be it known thatI, `JAMES MORGAN, a citi-` zen of the United States, residing at `Pittsburg, in the county of Allegheny, State of Pennsylvania, have invented'or discovered a new and useful Improvement in Bolt and Rivet Machines 5 and I do hereby declare the following to be afull, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of thisspecification, in which-like letters indicatin g like partsi Figure l is a top `plan View of my improved machine, and Figs. 2, 3, and 4 are similar views ofthe die-carrying head and shaft and the mechanism employed for operating the dies. .i My present invention relates to certain improvements in that class of bolt and rivet machines for which Letters Patent of the -United States were granted to me October 26, 1880,

No. 233,685, and July 11,1882, No. 261,022,

feeding position as againstmotion` in eitherdirection while the feeding is done, as herein-` after more fully described and claimed.

In'Fig. 1 of the drawings I have illustrated a general plan of my improved machine, manyA of the details of which are substantially like the machine shown in Patent No. 261,022,` above referred to. In this figure, A repre-i` sents the main frame. line of this frame is journaled a short shaft, S, by `box S2. 'On one end of this shaft is secured a radially-mortised head, S, carrying in its` mortises dies s, having tubular die-cavities s' therethrough,one in each die. ceive motion from shaft S', as hereinafter described, whereby they are brought in succes- A sion in front of or in line with the feed-tube C,

the die-cavities being in such position `in line-` thetubular passage through that the In or near the central These dies rerod passed endwise through the tube will also pass through the die-cavity and against a stop, N, also set in the line of feed on the side of the dies opposite the feed-tube.

Before describing the several functions of tlese several parts, and their several movements by which such functions are performed,

4I will describe, briefly, other parts of the machine, whichare substantially like thecorrespondingpartsinPatentNo.,261,022. i Among these parts are the feeding, the heading, the discharging, andthe stop mechanisms. Feed i is imparted automatically by two rolls, D, journaled in upright's or housings D. The rolls are connected by gearing D2, so as to take movement together. Intermittent feed or rotary movement is given them by a Vibrating arm, E, extending downward from the eX- tended shaft D3 of one roll, connection being made therewith by an ordinary ratchet-clutch, e, or by other suitable clutch mechanism such that vibration ofthe arm may give the shaft intermittent rotary movement in one direction. From the lower end of arm E a pitman-bar, E', makes pivot connection with one arm of a rocking crank, El, and fromthe other arm of this crank a similar pitman-bar, E3, makes connection with the wrist B on the-end of driving-shaft B, whereby continuous rotary motion of the driving-shaft gives reciprocating motion to theApitman-bars, vibrating arm E, and j giving feed-motion to the rolls, as stated. i The stop `N,,which arrests forward feed of the rod, thereby securing uniform lengths of blanks, is

adjustably secured in the end of its supporting-bar N by screw n, whereby the stop may be set for` different lengths of blanks.

In order to move the stop out of contact with the end of the blank preliminary to moving the dies, the bar N is pivoted to a standard, vN, as at of, and its outer end rests upona cam, N2, secured on the driving-shaft, so that each rotation of the shaft and cam lifts the outer end of the bar and dips or depresses the stop. The header K is placed on the right-hand side of the bed, its distance from the feed-tube C being equal to the distance between successive dies s, or being some multiple thereof, so that when one die is in feeding position to receive a blank, anotherfdie Vmay be in position to be operated on bythe header. Y This header IOO being operative in upsetting the endl of theblank protruding from the adjacent end of the" die. The blank is supported as against the pressure of the header by an anvil-pun`cl1,i, carried by sliding block I. The punch is Withdrawn by a spring, I', and is pressed forwardY into the flaring or bell-mouthed end s2 of the `die-cavity by va sliding wedge, I2., actuated by pivoted lever I3 and cam I4. This movement of the punch is designed to move the blank endwise in the die-cavity, carrying its end out of the flaring portion s2, which latter feature is provided to facilitate entry of the rod into the cavity in feeding. against the end of the blank by the wedge I2 until the header has completed its work, when both the header and punch are withdrawn by their respective springs, K3 and I, I l

On the left-hand side of the frame, corresponding to one position of rest of the' dies, is.

mounted adischarg'ing-punch, w. This punch is carried iny horizontal reciprocating movement into and out of the die-cavites to discharge the article therefrom by a sliding plate or frame, W, which is secured by suitable guides on thebed ofthe frame, and is actuated by a spring, V3, and bya cam on the drivingshaft pressing upon ahead or yoke, W2, which latter is connected by stem W to the frame or plate W.

In the operation of the machine the feed'- ing, heading, and discharging operations are performed simultaneously, or nearly so, While the dies are at rest. l It is of great importance in this connection that while these operations are being performed the dies should be held firmly in position as against movement either forward or backward, in order that the several parts of the machine may operate properly in connectionwith the dies; also, that in shearing the cut should be made in part from each side, front, and back, in order to avoid fins on the edge of the rod and blank.: This is of special importance, not only to prevent obstruction to proper entry ofthe rod into the die-cavities in feeding, but also to prevent bending the end of the blank when pressed against the stop N. If a projecting edge is made on one side by an inclined cut across the rod in one direction, there is a decided tendency therein to bend or be deliected out of the true vline of feed under endwise pressure between the stop and the feed-rolls, the rod being heated and very pliable. If the protruding end of the blank is thus bent, a one-sided head is y formed in the heading operation 5 also in such heading operation on a bent blank there isa marked tendency to move the diesusually backward, depending upon the direction of bend, and this backward or moving pressure upon the dies interferes 'more or less with theffeeding' The punch is held operation, not only by pressure and friction upon the moving` rod, but also by tending to bend it, thereby increasing the trouble, caused in the first instance by an improper cut in shearing the blank from the rod. These difficulties are4 obviated in mypresent invention by shearing the blank from the rod, as in my prior patent, No. 261,022, by first moving the v 'die backward partially-Tsay'halfway-across the feed-passage, thereby making a cut into tlievro'd from one side, and then moving the die entirely across the feed-passage in the opposite direction to completely sever the blank,

and, inaddition to this, I make provision for holding the dies rigidly and firmly against charging is done, so that not only is easy feed and a straight blank secured, but also perfect,

full-sided, and 'well-shaped heads, this latter feature being secured not'alone by the straight form of blank, but also by' preventing movement of the dies un'der'the force applied in heading. In. securing these. several advantageous results, I make use of a disk or wheel, R, secured on the outer-end of shaft S', such wheel having on its outer side face a series of pins or studs, 1" if r3 of, set at uniform intervals in circular order around the axial center.

`These pins work in cam-grooves formed on A the periphery of a wheel, R, secured on driving-shaft B.Y About one-half the circumference of this wheel It is occupied by a groove, a, straight or parallel with the plane of the wheel within which some one of the pins (r3, as shown) is held while the feeding, heading, and discharging operations are performed. As this groove a is in and parallel with the plane of rotation of the wheel, rotary motion of shaft S willv be effectually prevented so long as one 'of the pins is in the groove. The remaining part of the periphery of wheel R is occupied by ca'ms and grooves inclined across its peripheral face, designed to act upon movement in'either direction While the feeding is' done and while thepheading and dis- IOO IIO

and give rotary movementA to the pins and to the shaft carrying the dies: These inclined cams and grooves consist of an inclined groove, a', crossing the face of the wheel at or leading to one sidethe left sidefrom one end of the straight groove a. A correspon'dingly-inclined cam, c, forming one wally of ygroove a, also crosses the face of the wheel in the same direction, and is extended somewhat .on the left-l hand side'by a curved piece, c', secured therelto by screw c3,- also, a cam, c2,is extended to the right-hand side, parallel, or nearly so, with cam c, and separated therefrom by an inclined groove, a2, leading from the right-hand side of the Wheel, past thecam c2, tol the plane or line of straight groove a; also, an inclined groove, a3, leads from the left-hand side across the ends of grooves a a2, emerging on the righthand side, as at a4.

' In operationa pin directly below the axis, as pin r3, takes the groove a'luntil in the rotation of wheel It such pin enters the4 groove c', when it crosses the face of the wheel through arias/is g e the latter groove, while other pins above the axis cross in opposite direction through the groove a3 at.

In Figs. l and 2 I have shown the pinr3 below theaxis of S entered in the straight groove ci, the wheel R being turned a little farther in Fig. 2 than in Fig` l, for the purpose of shwing better the inclined cams and grooves which first act upon the pins.

In the order of operation the side extension, c', of cam c first acts upon or presses the inner side of pin r (above the axis S) just as pin r3 (below the axis) emerges from groove a. This pressure of cam c moves the pin and its shaft back from right to left, lthus giving the back movement of the dies partially across the feed-passage to partly sever the blank. In order to clear the pin r3 for this movement, the side wall between groove a and cam c is cut away, as at a5, so that pin r may enter this recess or cut in the wall as it is moved backward. This back movement is comparatively small, by preference such as to move the dies about half-way across the feed-passage. Its

- extent may be varied` to advantage with rods of different size, and for this purpose the campiece c is made `removable by the screw attachment c3, above described, so that interchange may be made with other parts or pieces of different degree of lift or curve. As the pin r' turns the rounded face of cam c', the pin r3 below is pressed by the inclined cam e, (see Fig. 3,) thereby moving the wheel R in the direction indicated by the arrow, carrying the die entirely across the feedpassage toward the header, thus completing the shearing operation.

Owing to the limited width of space available between the pins r r2, duc., for the wheel It', I prefer to complete the forward movement of theA dies-amounting in the present instance to a quarter-rotation plus the amount of back movement at first given-by engagement of cam cl upon pin fr", which is moved into position thereforas the pin r3 approaches or reaches the swell of cam c. This cam ci is in edect a continuation of cam c, though detached therefrom, so as to be operative upon another pin, and by its pressure upon such pin it continues and completes the desired forward movement yof the dies, carrying one to the header and moving another into feed- Y ing position.

As the cam c acts upon pin r3, the pin i, which has turned rthe swell of. cam c', takes into the groove a3, (see Fig. 4,) and, crossing the face of the wheel, emerges from groove a* on the right-hand side of the wheel. The pin o, under pressure of cam-c2, is carried to the central plane of the wheel in position to take the straight groove a when the die movements are complete, and thereby hold them firmly against either forward or backward' movement while the feeding, heading, and discharging operations are being performed.

Upon completion of the set of movements above described the pin /r will be on the right, `having `emerged from groove a (1*, the pin r2 will be in the central plane of the wheel, hav- `ing emerged from groove a2, the pin r3 will be on the left, having emerged from groove a, and pin of, which was not used in the preceding movement, is brought into position to engage cam c and to perform the same functions in the next set of operations as were performed l by pin r in the preceding set, so that in such second or succeeding operation the pins operated on will be first r* by cam c', second lr2 by cams c c combined, and third r by cam c2.

The number of pins provided on the wheel R may be increased or diminished, depending f upon the number of dies carried by shaft S and the fractional part of a rotation which is to be given at each operation, and such variations in number I consider as coming within my invention. I prefer, however, to use four dies and four pins, a-nd to give the die-carrying shaft a quarter-rotation at each step plus the amount of back movement at first given for shearing.

I claim hereinas my invention- 1. In a bolt and rivet machine, the combination of feed-tube C, dies s, in any desired number, such dies being movable, backward to partially sever the blank, and then forward to completely sever the blank, and a device, substantially as described, which gives such backward and forward movements to the dies and holds them in positions of rest thereafter against movement in either direction.

2. The die-carrying shaft S, in combination with wheel R, having pins projecting from its side face, and wheel R, having cams and grooves on its periphery engaging with the pins on wheel R, substantially as and for the purposes set forth.

3. The combination of a die-carrying shaft, a wheel secured thereon having pins proj ecting from its side face, and a wheel having on a part of its periphery-face a groove parallel with the plane of the Wheel, and onthe 4remaining part of such periphery having inclined cams and grooves, substantially as set forth.

4. The combination of die-carrying shaft S', wheel R, having pins projecting from its side face, driving-shaft B, and wheel R, the latter having on its periphery-face straight groove a, inclined grooves a" a2 a3 and inclined cams c c ci, substantially as and for the purposes set forth.

5. The combination of die-carrying shaft S', disk or wheel R, having four pins, i" r2 r3 r4, on its side face set in circular order about the ICO iro

axis of the shaft, and wheel R', having on the dies both backward and forward to sever piece c', substantially as and for the purposes ro set fort In testimony whereof I have hereunto set the blank and carry the dies in succession from the feeding to the heading positions, and for holding the dies during the feeding and headmy hand.

inO operations from movement either forward orbbaekward, as set forth. JAMES MORGAN 7. The wheel R', having` straight groove a, l Witnesses:

R. H. WHITTLEsEY, C.' L. PARKER.

inclined grooves a, a2, as, and a4, and inclined cams c c2, in Combination with removable cam-

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