US574609A - Machine for heading screw-blanks - Google Patents

Description

(No Model) I s'sneet sheei 1.

HYK; JONES. I MACHINE FOR READING SCREW BLANKS. 574,609..

Patented Jan. 5, 1897.

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(No Model.) 8 she ets sheet 3. H. K. JONES. MACHINE FOR READING SCREW BLANKS.

N0. 574,609. Patented Jan. 5, 1897.

8 Sheets-Sheet 4.

(No Model.)

' H. K. J0N'Bs. I MACHINE FOR READING SCREW BLANKS. No. 574,609.

Patented Jan. 5, 1897.

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H. K. JONES.

'MAGHINB FOR READING, SCREW BLANKs. No. 574,609. Patented Jan..5, I897.

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' I H. K. JONES. MACHINE POR'HBADING SGRBW BLANKS;

Patented Jan; 5 ,1897

I? M'U A2134 titers? lUNrrnn HORACE K. JONES, F HARTFORD,

RUSSELL & ERlVlY MANUFACTURING (WDMPANY, 0F NE? BRITAIN,

CONN EC'll CUT.

Prvrnnrr @rrree.

CONNECTICUT, ASSIGNUR TO THE SPECIFICATION forming part of Letters Patent 1*lo. 74,609, dated. January 5, 1897. 7 Application filed October 12,1895. Serial No.%65,489. (No model.)

of operation, and the rapid production of well- .lormed blanks.

In the accompanyingdrawings, Figure l is an elevation of my machine, showing one of the longest sides. Fig. 2 is ztn end view. Fig.

:5 is an elevationshowing the opposite side l'rom that shown in Fig. 1. Fig. t isn plan view. Fig. 5 is a longitudinal section of the main purts of the some on the lineunrof Fig.

t. Fig. 6 is u like view of parts on the line ;I y'of Fig. 4. Fig. 7 is :2. rear law of the ram with the pitmnn removed. Fig. 8 is an enlarged transverse section on the line 11 1/ of Fig. -.t. Fig. 9 is a horizontal section, partly in plan view, of parts of my machine, on the line r r of Fig. 1, 0n the same scale as l igs. l to b. Fig. 10 is a. vertical section of vparts on the line .2 of Fig. 4. Fig. 11 is an enlitrged elevation of parts op 'ierthining to the feed. Fig. 12 is afront elevation of the heading-punches and their holder, the upper ends of the holder being shownin vertical section on the line .u' u of Fig. 13.

Fig. 12. Fig. 1-1 is an enlarged side elevation of one of the heading-dies, together with the end of the lust heading-1n: nch. Fig. 15 is ztn end view of the heading-dies, and Fig. 16 is it view showing a portion of the reverse end of one of sziid dies.

A designates the frame of the machine; 1;,

the driving-shaft; U,thedriving-pulley on said shaft, and l) the cam-shaft. The main shaft is provided with u tm era-11k 15, Figs. 5 and 9, connected with the longitudinully-reciproenting rum. E by means of the pilman 14. The ruin i is connected with the piinmn through ilsudjustubleblock 16,which Fig. 1 is u horizontel section of thesznne on the line u n of may movelongitudinally in the rum on suit-- able wnys or guides. This block is supported or booked, to make it solid with the other parts of the mm, by means of the wedge 17,

l whose threaded shank 18 extends through the "1301) of the rznn, where it is provided with an tdjusting-nut 1!). By loosening the wedge 17 the sliding block may be pushed farther into the rum to shorten the some and thereby adjust the position of the heading-punches 2O 21 2:. relatively to their stroke, and the nut and wedge may be used for adjusting the sliding block in the rain when said block is moved outwardly to lengthen the rum. In suitable I guides in; the front end of the rain is the punch-holder '23, arranged to slide vertically in suitable ways.

In the middle of the die-holderut the front is a dovetailed recess 2% to receive the punch- I l'holding blocks 25, arranged in pairs, with their outer side faces beveled to correspond with the beveled side walls of the punchl holding recess, while their confronting feces are grooved to correspond to the shape of the i shanks ot' the several heading-punches. I i have shown these shanks as square in crossseetion, but they maybe of any desired form.

Above the pairs of punch-holding blocks 1 place it cup-block to fill .the recess above said blocks, and l. secure the some in place in any proper manner, for example, by a bolt .27, which bears on the top of said block. The severed pairs of punch-holding blocks and the howling-punches within said blocks are held in plane laterally by means of the set-screws .28, set-in. the punch-holder sons to stand approximately at right angles to the beveled side faces of the die-blocks. Those set-screws not only firmly hold the heading-punches, but by loosening the set-scrow at one side of a pair of blocks and tightening the one on the opposite side the heading-punches may be adjusted laterally in eithe direction, as may he desired. 1 The driving-shaft l5 and. com-shaft l) are connected, by means of the gear-wheel 29 on shaft 13 and gear-wheel 30 on shaft D, with I teeth in the proportion of one to three, the former wheel having twenty and the latter 1 sixty teeth, whereby the driving-shaft makes three revolutions for every revolution of the ca1n-sl1aft,'so that the ram makes three strokes inheadingcach blank. in thus making three strokes it is necessary to vary the height of the heading-pu nchesat each successi ve stroke in order to bring them into proper alinement with the blank in the heading-dies 31. At the lower end of the punch-holder 233 secure a spring til, the other end of said spring being secured to some suitable stationary support, as, for example, the pan or floor under the machine, said spring having a constant tendency to pull and hold the punch-holdcr down as far as its stops will permit it to fall.

Adjacent to the conical cavity the faces of the die-blocks are beveled off, as at l5, to bring the side walls of the cavity at that end to a chisel edge. The die-blocks are also recessed transversely to the conical head-cavity, as at 46, so that a transverse slot is formed through the top or outer end of the head-cavity, as shown. I also bevel off each corner of both die-blocks, as at 47.

For-convenience and to economize in stock '1 form the proper die-cavities in each of the four side faces of the die-blocks, but this is not essential. These dies are placed in a i trans verse groove of the dieholder -S, which The lowermost position of the punch-holder to bring the first punch 20 in front of the headingpdies at the first stroke of the ram in l'orminga head is governed by the adjustingscrew 40, the lower end of which then rests upon the top of the ram it.

The height of the punches-212ml 22 is regulated by cams, levers, and screws. The cam :36 on the cam-shaft D acts upon the lever 37 to bring its farther end faee into a horizontal plane. In the punch-holder is an adjustingscrcw 38, the lower end of which may rest upon the end face of said lever and thereby bring the punch-holder to its next highest 01' medium position, with the punch .21 in alinement with the headi stroke of the ram in forming a head. The lever is raised to bring the holder to approximately the proper height by the cam 36, and the screw 38 enables the height to he more nicely adjusted. A set-nut may be applied to said screw to lock it in its adjusted position. A similar cam 32 on the cam-shaft I) acts upon the lever 3.) in like manner to bring the punch-holder to its highest position and the last punch into alinemcnt with the heading-die for the third and last stroke in forming a head. A like adjusting-screw S provided with a set-nut 35, bears upon the end of the lever, lever 37 and screw 38. The levers 33 and 37 may be provided with proper shoes at either or both ends to prevent wear, although I have shown shoes 35) only at one end thereof.

So much of the machine as hasbeen thus far described may be used in connection with any known heading-dies and feed, but I prefer to employ the particular dies 31 herein shown, which form cutting-off and pointing dies, as well as the dies which give form to divided dies or recessed faces,

the headed blank. These are dies formed of two blocks with commonly known as open dies, lhe recesses of two confronting laces forming, the proper cavity for the headed blank. These dies are shown by themselves in Figs. ll, 15, and 1 3, in which 41 designates the conical cavity for the head, 4:? a short cylindrical shank cavity, 413 the c diudrical cavity to term the body of the screwblank, the same beingprefcrably of a little less diameter than the shank-cavity, while l-l is the conical cavity for the pointed end of the H ng-dies for the second,

as before dtsclihziihlbr the l nut 90. properly set is to remain stationary.

through which the cam-shaft l) passes.

5 otherdirection. i the gear-wheels To, one oi whie may be arranged for adjusting vertically in any proper manner, and suitable caps ll) may partly cover the front or outer ends of the die-blocks to keep them from working forwardly out of the recess in the die-holder. I also prefer to employ filling-blocks for filling out the recess in the die-holder. A tube 89, Fig. 5, extends down through the die-holder 48 to the top of the dies 31, di-

rectly over their confronting faces, and this tube is connected in any ordinary manner with an air-supply for conducting an airblast down through the space between said dies whenever they are opened. At the lefthand end of the dies, Fig. 8, in the frame A there is a tubular adjusting-screw 51, within "which is a holding-rod 52, carryinga collarblock 53 between the end of said screw and the .lilling -block on that side of the dies. This holding-rod prevents the collar-block from falling down out of place, and said rod may be held in place by a spring or button 54 on the frame of the machine. Thetubular adjusting-screw 51 may be secured against accidental displacement by means of the set- The die-block on this side when Extending obliquely through the die-block to the beveled-off corner 47 of the other die is a sliding rod 55, that is pressed upon by a spring 56 with a constanttendency to separate the two dies. On the other side of the dies, the right-hand side in Fig. 8, is the dieclosingr slide 57, having a screw-adjustable stop 58 for striking against the frame A to limit the outward movement; of said slide, whose outer end is provided with a wedge or cam 59.

The disclosing rollers HO (ll are mounted in a sliding block (53, which is integral with the roller-slide 03, said slide being guided at one end by the bracket til on the frame of the uiacliineatnd at the othereud by the bcaringlock 35 on the frame of the machine, and The back of the gear-wlnrel 30 is rcccsscd to form the llllt rnal cam Uli, Fig. lb, which acts upon the friction-roller UT of the roller-slide for moving said slide in one direction, while the cam lib acts upon the companion frictionin the g rollers carry h engages the roller b'fl for moving the roller-slide 'lhe die-closin ICC when said rollers are opposite the thinner part of said wedge and closed when the axis of the die-closing rollers are substantially in alinement with the axis of the die-closing slide, as shown in Fig. 9.

Thefeed-rollers 72, ratchet-wheel 73 on one of the feed-roller shafts, the pawl or pawls 7 4, vibrating pawl-carrier 82.itsoperatingpitman 75, and crank 76 are-of an ordinary construction considered by themselves, but in connection therewith I employ the pawl-lifting lever 77, which is journaled on the. set-nut 90 and is moved in one direct-ion by the cam '78 on the cam-shaft D and in the opposite direction by the spring 79. One end of this lever 77 lies adjacent to the ratchet-wheel 73 and is curved on a radius about equal to the radius of said wheel. \Vhen the lowest part of the cam 78 is in contact with that end of the pawl-lifting lever, the curved end thereof falls so low that the pawl or pawlslare permitted to engage the ratchet-wheel'for operating the feed; but when the higher and concentric portion of said cam is in contact with said lever the curved end thereof is raised, as. most clearly shown in Fig. 11, so as to throw the pawl or pawls out of action, although the movement of the pawl-carrier is continuous.

v Inasmuch as the shaft carrying the crank'7 6 for operating the pawl carrier also carries the crank for operating the ram and makes three revolutions to one of the cam-shaft, and the cam 78 is concentric for about two-thirds of its-periphery, the the feed-rollers at only one stroke out of three, that is to say, there are two idle strokes of the pawl-carrier for every feeding stroke, thus permitting the ramto give three strokes upon every blank fed to the heading-d iesand also giving the feed-rollers a quick movement.

The ram is driven by a continuously-moving crank-shaft to complete its strokes at regular intervals, the feed acting quickly'after the completion of a series of three strokes and before the completion of the first blow in a second series of strokes can be made, so that the rain is not stopped between said series of strokes for the purpose of giving time to feed the wire.- The pawl-liftingleveris provided with a pin or projection 80, which may be engaged by the hooked end of the retaininglever 81 to hold the pawls wholly out of action whenever it may be desired to stop the feed entirely without stopping the machine.

In connection with the dies slottedtransversely through the head-cavity, as before described, I provide the last heading-punch 22 with a slot-swaging blade 82, the length of which is substantially equal to the diameter of the head-cavity of the heading-dies, said blade standing in a inement with the slot 46 through the dies, whereby as the slot in the pawl-carrier acts to movefrom the head and into the slot 16, forming a wing or projection at each end of the slot in the headed blank. In order to remove this wing or projection and perfect the slot in the head, I employ the reciprocating clearing-tool 83. It is mounted on the' rocking-arm 84 of the rock-shaft 85. Said arm and clearing-tool are forced'downwardly by means of the spring 86 and upwardly by the cam 87 on the camshaft D, acting on a projection at the end of the conn eeting-rod 8, one end of which rod is secured to an arm on the rock-shaft 85, as best shown in Fig. 1.

Immediately after the feed-rollers 72 act to feed the properlength of wire the cam 68 acts to move the roller-slide 63 and block 62 to carry the die-closing rollers 61 to the position shown in Fig. 9, the rack 71 andgears giving said rollers a rolling motion to carry the roller 60 over the wedge cream 59 as they come into place, 57 is forced against the moving one of the dies to close them firmly upon the wire. The moving die in thus coming into place severs the wire, and the sharpened or chisel-like edges at the pointed end of the die-cavity cut a chip from each side of the wire opposite the pointed blank, and the metal left between the chipped sides and within the conical cavity it is swaged to form the pointed end of the blank.

has acted the cams 32 36 and levers 33 37 will be in a position to let the punch-holder down to its lowermost position to bring the first punch QOdirect-lyin front of the headingthe head. This punch may be recessed or made a little short, so as to leave something for the-other punches to do. At the second and third stroke'of the pawl-carrier the pawl or pawls are-held out of action by the cam 78 and lifting-lever 77, which willso hold' the pawls until the ram has made a series of three strokes and then release the pawls in time to have the feed act before the ram makes the first stroke in its next series. At the second stroke of the ram the cam 36 and lever 37 will be in a position.to cause the punch-holder to bring its second or middle punch 21 in front of the heading-dies to further perfect and nearly complete the head, and then the cam 32 and lever 33 in like manner elevate the pn nob-holder to bring t he third and last punch 22 in front oft-he heading-die at the third stroke of the ram to finish the head and swage the screw-driver slot therein. The recess in the cam 87 now comes opposite the bearingpoint or projection of the connecting-rod 88, so that the spring 86 is permitted to force the clearing-tool 83 quickly down through the transverse slot in the heading-die and the headedblank, thereby removing the metal at the ends of the slot in said blank. The continual rotation of the cam 87 returns the clearing-tool to its former position. The recess or i lower portion of the cam 68 now comes in front At the first stroke of the ram after the feed dies to act upon the' wire and partially form head is swaged the metal is forced outwardly so that the die-closing slide air-blast constantly flowing through the tube of this screw the distance to which I same in the combination, wilt beconsi 89 will blow away the chips or other matter from between the dies 31, ready for them to close upon thewire again to have the operations hereinbefore described repeated in the production of other blanks. .As the die-closing rolls 60 Glare removed from the die-c1osing rod 57 the spring 46 and rod 55 push the movable die 31, block ,50, and rod 57 outwardly until the screw 58 strikes the inner side of the frame of the machine.

are separated is accurately regulat d.

I have shown and described the j heading- 'dies and the last heading-punch'ili' the preferred form and in a form thatis adapted for use in combination with other parts, but I wish to make use of said illustration and description only for the purpose of laying a proper foundation for claims to the combination of said dies and punch, or either of them,

with other parts of the machine, having by amendment divided this application so as to confine what remains of it to the machine, while the dies and punch having the slotforming blade,

tion, Serial No.v574,973, filed January 10, 1896. It will also be observed that other headingdies, when substituted in the combinations pointed out in the claims so as to operate the dered the equivalent of those herein shown.

I claim as my invention- 1. The combination of the punch-holder having a recess with the several punches and pairs of punch-holding blocks with screwseats on, their outer side edges, a holding-cap and the screws 28 for holding and adjusting said p'unches laterally, substantially as described and for the purpose specified.

2. The combination of the reciprocating ram, a punch-holder mounted on said" ram, and two or more independent sets of levers and cams acting at difierent times for elevating said punch-holder to dilierent heights for different strokes of the ram, substantially as described and for the purpose specified.

The combination of the reciprocating ram, a punch-holder mounted on said ram, levers, cams, and separate adj llSliiDg-SCI'BWS for regulating the height of the punch-holder at each of its diflerent strokes, substantially as described and for the purpose specified.

i. The combination of the reciprocating ram, the punch-holder mounted to slide vertically on said ram, means for moving said ram vertically, and adjusting-screws iii, 38

and 40 extending to the top of the ram for adjusting the height of the punch-holder at different strokes, substantially as described and for the purpose specified.

By means the dies 31 considered by themselves, .form the subject-matter of another applicamounted to mounted on said ram, the continuously-rotatin g cran kvshaft directly connected with said ram by a pitman, the cam-shaft connected with said crankrshaft forrotating in the proportion of three to one, and means for holding the punch-holder at different heights for three successive strokes of the ram, substantially as described and\for the purpose specified. l I

' 6. The combination of the die-closing slide having cam or wedge with the die-closing rollers geared together, the rack '71, rollerslide in which said rollers are mounted, and the cam for reciprocating said roller-slide, substan tialiyas-described and for the purpose specified.

7. The combination of the heading-dies with the die-closing slide having cam or wedge at one end, geared'rollers and rack, and means for rolling said rollers against said cam or Wedge to close said dies for cutting off and pointing one end of the wire preparatory to heading the other end, substantially as described and for the purposespecified.

8. The combination of the feed-rollers, the ratehet-wheel for driving them, "the pawlcarrier and pawl for acting on said ratch et.

wheel, means for moving the pawl-carrier and .c

means for lifting and holding the pawl out of action during certain strokes of the pawl-.

carrier, substantially as described and for the purpose specified.

9. The combination of the rain, its drivingshaft, the puncl1-holder and punches on said ram, the cam-shaft connected with said driving-shaft to rotate in the proportion of three to one, the heading-dies, the feed-rollers, the ratchet-wheel, the pawl-carrier and pawl, the

pitman for driving'said pawl-carrier, a crank on said driving-shaft for driving said pitman and pawl-carrier, a pawl-lifting lever anda cam on'the'cami-shaft for regulating the action of said lifting-lever to make the continuouslymoving pawl-carrier feed only once for every three strokes of the ram substantially as described.

10. ,In a heading-machine, a die having the head-formin g cavity slotted transversely, the punchhaving the slot swaging blade in alinement with the transverse slot through said head-forming cavity, and a clearing-tool pass through said head-forming cavity to finish the ,slot in the headed blank, substantially as described and for the purpose specified.

11.- In a heading-machine, the combination of the die-holder, the heading-dies having at one end the chisel-edge cutting-01f and pointing cavity, and the air-blast tube iii said clieholder with its end directed to the space between said dies at the cutting end, substantially as described and for the purpose specified.

12. In a heading-machine whose ram makes two or more blows in forming one head; the combination of a continuously-rotatingcrank- IIO shaft, a continuously-moving ram directly connected to said crank-shaft by'means of a pitman, punches mounted onsaid ram to move therewith, and a cam-shaft geared to said crank-shaft and acting to move the punches into position for their successive operations on the head, substantially'as described and for the purpose specified. I

'13. In a heading-machine, the combination of a ram carrying three punches, mechanism for presenting said punches. consecutively to the heading-dies at equal intervals of time,

and-an intermittent feedwhich acts after each blowof the third punch'andbefore the next blow of the first punch, the interval of time between each series of three strokes being the same as the interval of time between any two consecutive strokes in each series, substantially as described.

14. In a machine for heading blanks, the combination of a series of heading-punches carried on a ram, with a continuously-revolving crank-shaft, a pitmandirectly connecting said crank-shaft and ram, mechanism for consecutively presenting-to the heading-dies the difierent punches in said series, and an intermittent feedoperatlng between the last blow for binding the several 'eachother, and means for separately adjustof the last punch and. the first blow of the first punch in said series of punches, the interval of time between said blows being equal to the intervalbetween the blows of any two consecutive punches in said series, substantially as described.

15. The combination of a punch-holder, with the several punches and pairs of laterally-movable punch-holding blocks, means for binding the several pairs of blocks upon each other, and means for separately binding I each pair ofblocks upon its punch, substantially as described-and for the purpose speci 1G. The combination of a punch-holder with the several punches and pairs of laterallymovable punch -holding blocks, means pairs of blocks upon ing each pair of blocks and its punch laterally, substantially as described and for the purpose specified. i

HORACE K. JONES. Witnesses:

' T. S. BISHOP,

M. S. WIART

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