US539964A

US539964A - Machine for making chain-pins

Info

Publication number: US539964A
Authority: US
Publication date: 1895-05-28
Anticipated expiration: 1912-05-28

Description

' (No Model.) 3 Sheets$heet 1.

C. M. SPENCER. MACHINE FOR MAKING CHAIN PINS.

No. 539,964. Patented May 28 1895.

In i/efltor: [727219 zap/zerM 15727672667? by 121;; uiCZOTJZC (No Model.) 3 SheetsSheet 3.

, 4 0. MFSPENCER; MACHINE FOR MAKING CHAIN PINS.

No. 539,964. Patented May 28, 1895.

ale

IHIIIIIIIII-IIIIIII IIIIIIIIHHH UNITED. STATES PATENTOFFICE.

CHRISTOPHER M. SPENCER, OF WINDSOR, CONNECTICUT.

MACHINE FOR MAKING CHAIN-PINS.

$PECIFICATION forming part of Letters Patent No. 539,964, dated May 28, 1895.

' Application filed June 13, 1894- Serial No. 514,423. No model.)

To all whom it may concern! Be it known that I, CHRISTOPHER M. SPEN- GER, a citizen of the United States, residing at V' indsor, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Machines for Making Chain-Pins, of which the following is a specification.

This invention relates to machines for making pins or rivets of that class used in sprocket and other chains and commonly known as chain-pins.

The object of my invention is, primarily, to furnish a simple and efiective machine for automatically making two-shoulder pins, or rivets, from a continuous rod of indefinite length with rapidity and economy, and with a high degree of precision.

In the manufacture of chain-pins as heretofore practiced, it has been customary to turn down or diametrically reduce the opposite ends of the stock or blank-from which a pin is to be made to formthe shoulders of the pin, and to do this by two successive and separate operations, the stock being first partially cut away or reduced at one end to form one shoulder, and then turned end-for-end and the operation repeated to form the other shoulder. By that method it is extremely difficult to form a chain-pin whose opposite ends are symmetrical and precisely coincide with the other; also itis, by that method, extremely difficult to secure the required accuracy, since the exact distance between the shoulders of eachchain-pin isthe result of several operations, and not the result of a single operation. In that case the required distance results from the setting and re-setting of the blank in a chuck or holder, as well as from successive cutting operations, all of which will, in practice, vary in some degree thereby rendering it practically impossible to make the pins witha high precision and at the same time rapidly and at low cost. Itis therefore the chief object of my present invention to overcome the difficulties in the manufacture of chain-pins inherent to known methods andI do this by providing means whereby both shoulders of the pin may be formed and both ends of the pin may be turned down or diametrically reduced simultaneously and at one cutting operation, there- Fig. 2

of a slightly modified form of machine embodying my said invention. Fig. 5 is a plan view of the cutter carrying and traversing mechanism on an enlarged scale, said figure showing the pin-forming rod in position and as being operated upon by a cutter to form a shouldered pin-blank. Fig. 6 is a sectional plan view of said mechanism, showing the severing or cutting-off tool in its advanced operating position and the pin blank-forming tool in its retracted position. Fig. 7 is a crosssectional view of the tool carrying and traversing mechanism, taken in line a a, Fig. 5, looking toward the right hand in said figure. Fig. 8 is a similar cross-sectional view of said mechanism, taken in line b b, Fig. 5, looking toward the right hand in said figure. is an under side view of said mechanism.

Similar characters designate like parts in all of the figures.

The framework A, which may be of any suitable construction for carrying the several operative details of the machine, is shown consisting of the bed B, supported at its ends by suitable uprights 2 and 3, which may be formed integral therewith or be secured thereto as desired, said uprights being carried upon a base 4.. Journaled in bearings 5 and 5', formed in the uprights 2 and 3 is a camwheel carrying shaft 6, upon which one or more cam-wheels, as 7 having suitable camfaces for operating certain elements of the machine, may be mounted, as will be hereinafter described, said cam-shaft, in practice, being driven by usual shaft-driving mechanism (not shown) connected therewith.

Supported at one end of the bed of the machine (shown in the drawings as the right hand end) is the rod-carrying-and-feeding Fig. 9

mechanism, designated in a general way by O, and adjacent thereto and located near; the

opposite end of the bed B of the machine is the tool-carrying and operating mechanism, designated in a generalway by D.

In the drawings I have illustrated two slightly modified forms of pin-forming machines both of which are within the domain of, and embody my invention. In the preferred form thereof shown. in Figs. 1, 2 and 3 the rod-carrying-and-feeding mechanism 0, is shown consisting of two adjacent peripherally-grooved feed-rollers Sand 9, revolublysupported upon studs 10 and 11-, secured inan upright 12, upon the bed of the machine, one of said feed-rollers. being shown provided, with a ratchet-wheel 13,which is operated by a pawl 14, upon a feed-lever 15,,pivotallycarried at one end upon the stud 11 and in bearing contact at its opposite end with the cam-face 16, of the cam-'wheel7 secured to the cam-shaft, said lever being retracted by means of a spring 17, as shown most clearly in Fig. 2 of thedrawings. In this instance,

the pin-forming r dfdesignated by R, is, non-rotatively supported between the. feedrollers in posi'tionto be operated upon. In this connection it should be noted that the particular form of rod-supporting-and-feeding mechanism shown in the. drawings constitutes no material part of iny present in vention, as any suitable construction and. organization of rod supporting; and feeding mechanism may beemployed without departure from myinvention. In somecases it may be desirable to employ a feeding mechanism embodying a revoluble rod-carrying spindle such as illustrated in Fig. 4 of the drawings, and it is to illustrate the applicability of my improvements to a machine employing either feed-mechanism for rotating the pin-forming rod, or feed-mechanism adapted for holding the rod against rotation, that I have shown the two modifications illustrated, particularly, in Figs. 2 and 4.

Again referring to Figs. 1, 2 and 3 of the drawings, the. cutter-carrying mechanism is shown comprisinga spindle 18-,revolubly-supported in bearingsformed in brackets19 and 19', formed upon the bed Of the machine at the left hand end thereof, a combined toolcarrier and rod support carried upon thevforward end of the spindle 1'8 and designated in a general way by E, which tool-carrier and rod support will be hereinafter termed the tool head, one or more transversely-disposed tOOl-carrying slides, herein, shown as. two in number, and designated by 2 0 and 21,

respectively,snpported for sliding movement in opposite directions in said toolcarrying head, a tool-slide traversing ca, tn,22, in operative connection with said slides, and tools carried by saidslides in positionand adapted for p ati p th p ming" 10 will be hereinafter more fully described.

As a means for rotating the'tool-head E, the the spindle 18 thereof will'usually be provided with a pulley 23, which will be driven by a belt Qnot shown.) from any suitable source of power, and as a means for reciprocating the tool-traversing cam 22, this cam, which is in the nature of a plate having obliquely-disposed cam-

grooves

24 and 24, formed therethrough, is provided at one end with a peripherally-grooved hub or collar 25, which is mounted for sliding movement upon the for- -wardend. of the spindle 18, and is operated by a shifting device, which in the form thereof herein shown consists ofa shifting arm 26, havinga bifurcated upper end 27 in engagement with the. collar 25, said shifting-arm 27, being carried midway of its length upon a rod 28, supported for sliding movement in the brackets 19 and 19' the lower end of said shifting-arm being in bearing contact with a cam-face 29, upon the cam-wheel 7, by means :of' which cam-wheel the shifting device is operated.

:1 head, is revolubleand the, rod R is held against rotation, whereas in Fig. 4 this order of things 1 is reversed, the tool-carrying head being sta tionary, and. the rod being rotatively held.

Referring to the modification shown in Fig. 4, the cutter-carrying head L is. shown supported upon the bed of the machine, while the tool-traversing cam-operating mechanism is shown substantially similar to that shown in Fig. 2, with the exception that the guiderod. for the shifter-arm is supported for sliding movement in a bearing formed in the toolcarrying head instead of ina bearing formed in the

brackets

19 and 19. In the preferred form thereof herein shown, the tool-carrying head consists of the bed or main body 30, having a series of re1notely-disposed transverse uprightsor supports, herein shown as three in number and designated by 31, 32 and 33. Thespaces, 34 and 35, between these uprights constitute slideways for tool-slides 2 0 and2l carrying toolsadapted for successively operating upon the pin-forming rod. As a means for reciprocating the tool-slid es, a. traversing-cam 22;, is provided as before stated, which camissnpported for sliding movement in a groove formed in the under face of the body-portion 30 of thetool-head E, which cam has parallel obliquely-disposed cam-grooves 2 l and 24 formed therethrough, as illustrated most clearly in Fig. 9 of the drawings, and through these grooves are extended studs 36, whose inner screw-threaded ends are screwed intoscrew-threaded holes formed in the toolsl'ides, and whose headed ends bear against the under face of the cam 22 as clearly shown in F nd As a means for formingarigid support for the pin forming rod, in close proximity -to and at both endsof that portion being turneddown or diametrically reduced to form the pin shoulders and at each side the cutting path of theturning tool, G, the two uprights In this instance the cutter-carrying IlO or supportsfil and 32 are transversely bored tocoincide axially with the pin-forming rod when the same is in position to be operated f and f of the completed pin.

upon, said bores being usually provided with bushings 32' and 33, the internal diameters of which substantially correspond with the diameter of the rod, which rod will, during the operation have a working fit therein and be held against lateral movement thereby. These bushings will preferably be held in the bores in the supports by screws 32" extending through said supports and bearing at their lower ends against said bushings as most clearly shown in Figs. 7 and 8. This means of supporting the pin-forming rod, in connection with the particular construction and organization of the turning apparatus, constitute the most important factors in the successful production of chain-pins in accordance with my present invention.

In the method-of producing the two-shoulder chain-pin as carried out by the machine herein shown and described, only two successive operations are necessary to complete the pin, that of simultaneously turning down or diametrically reducing remote portions of the pin'forming rod to form the two shoulders of the pin-blank, and that of cutting off the pin-blank so formed from the rod, which last operation completes the pin.

As a means for turning down thepin-forming rod to form a pin-blank-at one operation, I haveprovidedacutter or turning-tool G. This tool is in the nature of a double-tenon, cutter,

it having two coinciding, but remotely and preferably obliquely-disposed cutting-edges e and e, adapted for simultaneously forming two tenous upon the pin-blank forming portion of the rod, the distance between the inner adjacent edges of which exactly coincides with the distance required between the shoulders In the drawingsI have shown the two cutting edges e and e of the cutter G as obliquely-disposed with relation to the axial line of the rod R which adapts the cutter to form slightly conical ends f and f upon said pin. This cutter, as before stated, is carried by the slide 20 to which it is adjustably-secured by clamp-screws 20 extended throughan elongated slot 20 therein, and is located intermediate to the two rodsupports 31 and 32 with its two side edges slightly remote from the inner faces of said supports, and is adapted to be moved toward and from the rod R by means of the traversing cam 22 in connection with the slide 20, as before described. The cutting-off tool G is carried, as before stated, by the slide 21 located in the slide-way 35, and will in practice preferably be located at one side of the path of movement of the pin-forming rod opposite to the side upon which the turningtool G is located. These two tools G and G, as will be understood by reference to Figs. 5 and 6 of the drawings, operate alternately, the one G first operating to formapin-blank, after which, and during the retraction of the tool G, the one G operates to cut 0% the completed pin-blank from said rod. The operaknown form of chuck or rod-carrying spindle,

combined with a feeding device such as used in ordinary screw-making machines may be employed, the spindle thereof being provided with the usual driving mechanism, and the feed-mechanism being operated by the usual cam, as shown in said figure.

Having' thus described my invention, I claim 1. In a chain-pin-making machine, the com bination with rod-snpporting-and-feeding mechanism; of a cutter-head mechanism embodying two transversely-disposed fixed rodsup'ports carried by the cutter head and adapted for supporting the rod contiguous to both ends of that portion of the rod which is to be operated upon by the cutter,the transverse slide-way between said rod-supports, and the double-tenon cutter mounted in the slide-way and adapted for simultaneously turning down the rod at two separate points; and means for rotating one of said mechanisms relatively to the other, substantially as described.

2. In a chain-pin-making machine, the combination with rod supporting and feeding mechanism; of a cutter-head mechanism having two transversely disposed uprights or supports fixed to the cutter-head and forming between them a transverse slide-way, each of said uprights having a transverse rod-receiv- I ing bore in alignment one with the other, a

cutter-slide supported for reciprocationin said slide-way and guided between said supports, and a cutter-slide-traversing cam in operative connection with said cutter-slide, means for rotating one of said mechanisms relatively to the other, and means for actuating the cutter-slide-trayersing cam, substantially'as described.

3. In a chain-pin-making machine, the com- I bination with rod supporting-and feeding said slide-way and guided between said sup- I ports and the cutter carried by said slide and having two remotely-disposed cutting-edges one at each side thereof and in position and adapted-for operating simultaneously upon opposite ends of that portion of the pin-forming rod which is located between the two sup-1.

ports whereby both ends of a pin are formed simultaneously, means for rotating one of said mechanisms relatively to the other, and

means for reciprocating said cutter-slide, substantially as described.

4. In achain-pin-makin-g machine, the combination with the bed ot the machine, of two adjacent feed-wheelsfor supporting and feeding forward a, pin-forming rod, means for intermittently rotating said feed-wheels, a rotatable cutter-head having a transverse slideway, uprights or supports located one at each side of the slide-way and in position for re; ceiving and supporting that portion of the pin-forming rod which is tobeoperated upon, and the cutter supported for reciprocation, intermediate of said two, supports and guided between the same, and serving to simultaneously turn down both ends of that portion ofthe rod which is located between said supports, and means for operating said cutter, substantially as described.

5. In a chain-pin-making machine, the. 0.0m.- bination with rod supporting and feeding mechanism, ot'- a cutter-head mechanismhaving two transversely-disposed rod-supports fixed to the cutter-head and serving to support the, rod contiguous to. that portion of the rod which is to be operated upon by a turning-down cutter and: said supportsforming between them a transverse slide-way, a doubler tenon cutter supported for reciprocation in said slide-way and guided between said sup ports and serving to simultaneously turn down, the rod at two separate points, trans versely-disposed supports fixed to thecutterhead and forming between them a second transverse slide-way, and a cutting-0E tool supported for reciprocation in said second slide-way, means for rotating one. of said mechanisms relatively to the other, and means for simultaneously reciprocating the doubletenon cutter and the cutting-off tool, substan tially as described.

6. In a chain-pin-makingmachine, a cutterhead mechanism having two remotely and porting-and-feeding mechanism adjacent to said cutter-head mechanism, means; for rotating one of said mechanisms relatively to the 3 other, a cam in connection with and serving to actuate. the cutter, anda cam in connection with and Serving to actuate the rod-supporting-and-feedingmechanism to feed the rod, substantially as described.

7. In a chain-pin-making machine, a cutterhead mechanism having two transverse slideways, a turning and a cutting-oft tool oppositely-disposed and supported for reciproca tion in said slide-ways and guided between the same, said turning tool simultaneously turning the. rodat two separate points, and two remotely-disposed rod-supports in position for supporting the-rod contiguous to both ends of that portion of the rod whichv is to be operated upon by the turning-tool, one of said sup-ports being intermediate of the two tools, rod supporting -and feeding mechanism, means for rotating one of said mechanisms relatively to theother,cam-mechanism in connection with and serving to: reciprocate the two. tools of said cutter-head mechanism silnultaneously in the same direction and cammechanism in connection with and serving to actuate the rod-supporting-and-feeding mechanism to feed said I'Od, substantially as described.

8. In a chain-pin-makin g machine, a cutterhead mechanism embodying two transverselydisposed cutter-carrying slides, two rod-sup ports one of which is located intermediate of the two slides and both of which support a rod contiguous to bothE ends of that portion of carried by said slides, and a traversing-cam having twov parallel cam-faces connected with the two slides, a. revoluble cam in operative connection with the; cutter-traversing cam, rod-supporting-and-feeding mechanism adj acent to said cutter-head mechanism, means for-rotating one ofi saidmechanisms relatively to the other, and a cam for operating saidrodsupporting-andfeeding mechanism to feed the. rod, substantially as described.

CHRISTOPHER M. SPENCER.

Witnesses:

FRED. J. DoLn, RoBT. N. RUDDELL.

the: rod which is to be. operated upon, cutters