US332993A - Link-making machine - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1.

J. I. GHEESMAN;

LINK MAKING MACHINE.

n 0. KW m Wm/w .mw 2 w 4 M D m M J y w M m P M m y B M 4 3 S. 3 .H 3 W 0| I N w Q N PETERS, Fhalo-Lilhogmpher. Wflsllinghlm D4 C.

(No Model.) 3 SheetsSh eet 2.

' J. I. OHEESMAN.

LINK MAKING MACHINE.

No. 332,993. H ntqd Dec. 22, 1885.

' I F719 l 1' INVENTOR (76012 es .Z. 672668772617? @1 Q W By kis flttorney N. PETERS. Plmlo'lilhognpher. Wishing'un. n. c.

(No Model.) 3 Sheets-Sheet 3. J. I. CHEESMAN.

LINK MAKING MACHINE.

Patented Dec. 22, 1885.

INVENTOR James I. Cizeesman By 7221s .dttorney ll d m & M V S m F. m N T 7 I W N. PETERS, mmxouaho m m. Waihinglon. D c.

llama Tarts FFE PATENT LINK-MAKING MACHINE.

SPECIFICATION forming partof Letters Patent No. 332,993, dated December 22, 1885.

Application filed May '27, 1585. Serial No. 166,885. (No model.)

I?) all whom it may concern:

EiBe it known that 1, JAMES ;I. CHEESMAN, a

I citizen of the United States, residing at Alnation of parts for performing the several opor handling the blank between the bendingand welding operations.

The present invention consists more particularly, first, in a novel combination of parts for bending the straight rod or bar blank into U shape; secondly, into a novel combination of parts for holding the bent blank while its.

ends are lapped for welding; thirdly,rin a novel combination of parts for lapping the ends of the blank by motion transmitted from the hammer during its descent; fourthly, in a novel combination of parts for shifting the welded link upward by hand preparatory to the finishing operation; fifthly, 'in a 1mm combination of parts for imparting a smooth finish to the weld in the machine by hammering in the fins or lateral swells formed at the welding operation; sixthly, in a novel combination of parts whereby the finished link is again elevated, and is loosely held in a convenient position for withdrawal from t he machine when the machine is brought to its position of rest; seventhly, in a novel combierations which complete the link independent of the means by which the same are actuated; eighthly, in a novel combination of parts for automatically unclutching the main shaft of the machine from a loose driving-pulley at the end of each bending-stroke; ninthly, in a similar combination of parts for automatically unclutching said shaft from said pulley at the end of each return-stroke of the bending-slide; and, tenthly, in a combined bending-mandrel and welding anvil which collapses in a pc- ,culiar manner to release the welded link, as

hereinafter set forth.

Three sheets of drawings accompany this specification as part thereof.

Figures 1 and 2 of the drawings represent, respectively, a front elevation and a side View of my link bending and welding machine in its condition of rest.

Fig.3 represents afront" elevation of thesame, partly in section, on the mer and other parts in three positions, by full,

broken, and dotted lines respectively, and illustrating the end lapping and welding operations. Fig. 5 represents a front view of that portion of the machine immediately below its waist, partly in section, illustrating the shifting of the link preparatory to the finishing operation. Fig. 6 represents a vertical section of the machine in the plane indicated at 6 6, Fig. 5, illustrating said finishing operation. Fig. 7 represents a similar view of the upper part of the machine restored to rest, with the finished link hanging loosely on the welding-anvil, ready for removal from the machine. Fig. 8 represents a horizontal section in the plane indicated at 8 8, Fig. 7, and a plan view of the parts immediately below the plane of section. Fig. 9 is aback view of the mandrelslide shown in the preceding figures, and

Fig. 10 is a sect-ion on the line 0 0, Fig. '9.

' Like letters of reference indicate corre-' sponding parts in the several figures.

An upright frame, A, with a base-plate, B, and a pedestal, O, on the latter parallel with the sides of the frame, support the working parts of the machine, including, preferably, an elevated horizontal driving-shaft, D, parallel with the face of the machine, instead of which a convenient section of line-shafting, or a counter-shaft distinct from the machine, may be used. uprights of said frame A vertical ways w w are formed, and in the lower portion of said waysw and said ways w the said mandrel-slide,

In and on the inner surfaces of the- Figs. 9 and 10, shown at S in the other figures, with the cross-head X of its rod part, work" freely up and down. Said slide S, with the mandrel proper on its face, is in two parts, as clearly shown in the several face views, and in Figs. 9 and 10, to which reference is made for all details, the mandrel proper being divided horizontally into equal or nearly equalsectionsm m, carried, respectively, by the upper part of the slide and its rod part, which carries said cross head X. The upper end ofsaid rod part works in a vertical slot, 5, in said upper part of the slide, and is provided with a pulling cross-head, w, and said upper part of the slide is provided on its back, Fig. 9, with strong shoulder projections s s ,to engage with said crosshead 00, said slot 8 being extended to the lower edge of said upper part of the slide to avoid weakening. the rod part. The lower mandrel-section, m, is strongly attached to the upper extremity of the rod part by through-bolts. The upper mandrel-section,m, may be cast 011 the face of the upper part of the slide. or attached thereto in any approved way. The lower extremity of said rod part of the slide Sis connected by a pitman, P, with a crank-wheel, W, between the lower ends of the uprights of said frame A, which crank-wheel is carried by the inner end of a main shaft, M. the outer end of which is mounted in a bearing on said pedestal O. This shalt is provided centrally with a loose driving-pulley, L, which is connected by a driving-band, F, Figs. land 2, and pulley E with said driving-shaft D. Rotary motion is thus transmitted continuously to said pulley L. v

For transmitting motion to the main shaft M for lowering and re-elevating said mandrelslide S, a pair of clutch-slides, (J C", are mounted on splint-d portions of said main shalt, and clutchprojections a b are formed on the respective sides of said pulley L, to engagewiththerespectiveclutch-slides. Handlevers H H are connected with forks FtF", for engaging the respective clutchslides, the latterdirectly, (by-apivot pin orbolt,) and said 'hand-lever H, through the medium of a supplemental lever, L, and a horizontal slide-bar, S, as shown, the several parts being appropriately fulcrumed and coupled together. Short horizontal tappet-slides T T", for disengaging the respective clutch-slides automatically at the respective ends of the stroke of said mandrel-slide, are coupled with said lever L and said fork F", respectively, by the pivots which connect therewith said handlevers, and corresponding cam-surfaces,c c,are formed on the respective ends of the cross-head X, to coact with the inner ends of said tappet'slides.

In the state of rest (represented in Figs. 1, 2, and .7) said mandrel-slide S is in its uppermost position, and the mandrel m m" projects in front of arecessed face portion, r, of the frameuprights. Near the lower extremity of this recessed portion a. pair of feed-rollers, f f, are mounted on short studshafts which project from the respective uprights parallel to the sides of the mandrel, the plane of the tops of'these rollers being a short distance below the lower end of the elevated mandrel, so that a straight linkblank, Z, may be adjusted upon I said rollers beneath the mandrel, as shown in Fig. 1. Immediately below this point said uprights of the frame A project forward sufficientl y to accommodate in front of the plane of the madrel-slide certain parts which will now be described. An inner frame, I, in connection with the uprights of said frame A, partly incloses a pair of clamping-jaws, J J, having opposing inner faces, and pivoted at their lower ends, as shown in Fig. 3, upon the sill of said frame I.

Normally the jaws J stand in. retracted position, as indicated in Fig. 1, and in full lines in Fig. 3. For forcing them inward to clamp the link-blankl after ithas been bent to U shape, as represented in Fig. 4, and by dotted lines in Fig. 3, a sliding outer frame, 0, composed of a bottom cross-bar and two uprights, embraces said inner frame, I, which is of-like form. The cross-bar of said outer frame extends outward through vertical slots s s" in the uprights of the frame A, andthe upper ends of the uprights of said outer frame, which are articulated to its said cross-bar, work in housings h, bolted to said uprights of the frame A externally, and each is provided at this point with a cam-recess, Fig. 3, to receive at times and coact with a tappet projection, i

on the corresponding jaw; and a central vertical thrust bar, T, sliding through said sill of the inner frame, I, is coupled to the cross-bar ofsaid outer frame, 0, for transmitting motion through the latter to the jaws. A spring,

IOO

S at the back of each jaw, suitably-accommodated and coupled to thejaw, as indicated in Fig. 3, provides for retracting the jaw when said outer frame is reelevated. Said thrust-bar T receives its said motion fromjthe mandrel-slide, in the downstrokes of the lat ter, through the mandrel and link-blank, as illustrated by dotted linesin Fig. 3. This device is further utilized to cushion said downstrokes of the mandrel-slide by combining IIO therewith a spring or springs, S, interposed Y between said cross-bar of the outer frame, 0, and a parallel snb-sill, 8*. One or more springs of any approved form may be used. A hand-lever, H", also coupled centrally to said cross-bar, pivoted at its right-hand end,

and accommodated at its left-hand end by a vertical slot, 8, Fig. 6, in the left'hand upright of the frame A, provides, with the aid of said cushioning-springs S, for partially reelevating said outer frame, thrust-bar, link-J blank, and mandrel by hand, as illustrated by Fig. 5, after the endlapping and welding operations illustrated by Fig. 4.

The end-lapping and welding devices consist of a drophammer, H, working in said ways w in the frame A above themandrelslide, and having a long rod, R, by which it is connected with a piston in a steam-cylinder above, or other approved means for working the same in customary manner, and a pair of lateral tappetslides, T T, a' pair of 1evers,-L L, and a pair of horizontal lappingpushers, P P, with a retracting-spring, S and a guide-housing for each pusher, and other appurtenances, as indicated, said hammer having grooved cam-edges e, to coact with said tappetslides T T successively during each descent thereof, as illustrated.and hereinafter set forth; and the lower end of the hammer and the inner end of each pusher are shaped correspondingly with the upper mandrel-section, m, which possesses additionally the functions of an anvil in the end lapping and welding operations.

For making links from round rod iron or steel, for' which the machine is specially designed, the upper and lower ends of the mandrel m m, the peripheries of the feed-rollers f f, the inner surfaces of the clampjaws J J, and the effective concavity in the lower end of the 'hammer H are appropriately grooved, as

shown, so as to preserve the shape of the metal in cross-section and to facilitate guiding it. In a machine for working up square bar-iron into links such grooves would be omitted. I

For finishing the link after it has been reelevated by hand, as aforesaid, and as illus-' trated by Fig. 5, a last setof devices is employed, the operation of which is illustrated by Fig. 6, as aforesaid. These are a pair of horizontal finishinghammers, H H, located centrally front andrear, and working in housings'h h, a pair of levers or rock-frames, R R, coupled at their upper ends to the hammers, and a pair of crank-shafts, O C, for oscillating said rock-frames, with crank-disks D'D, fast on the right-hand ends of said crankshafts, an intermediate crank-disk, D, on a i stud-shaft projecting from the right-hand upright of the frame A, a rod, R, connecting the wrist-pins of said disks, 2. driving-band,

F, Fig. '1, embracing said disk D, which forms a pulley, a loose driving-pulley, E, on said driving-shaft D, and a hand-lever fork, H, for clutching and unclutching said pulley E with and from afast pulley, P, through which said shaft D receives its motion, said pulleys having interlocking clutch projectwooperators take their positions at the retions, as shown. Said pulley P being connected, directly or indirectly, with a steamengine or other motor in motion, and said haniiiier-rod R- depending from the cylinder of :a suitable drop-press, for example, in

working condition, the machine belted and in a state of rest, as shown in Figs. 1 and 2, is ready for work.

Provision having been made for a rapid supply of straight blanks Z, Fig. 1, cut of suitable length, with properly-scarfed ends, and each so heated that its ends are at or slightly above welding-heat and its middle a dull red,

I spective sides of the machine and the operation proceeds as follows: The man at the right thrusts a heated straight blank, Z, upon the feed-rollers f, beneath the elevated mandrel m m", as seen in Fig. 1, with its scarfs' 'l'ipand down, and, drawing back, pulls the hand-lever H, which instantaneously forces in the tappet-slide T, and through the lever L, slide-bar S, and fork F throws the clutch- 7Q slide 0 into mesh with the rotating loose pulley L, as shown in full lines in Fig. 3. 'The shaft M now makes a half-turn with said pulleyL, and through said crank-wheel W,pitman P, and mandrel-slide S, draws the mandrel m in in an instantinto the position and expanded condition represented in dotted lines in Fig.3, and therewith the link-blank l, now reduced to U shape. Bending to this shape is mainly accomplished when the parts reach half-stroke,

as represented in full lines in Fig. 3, and is effected to this extent by the coaction of the lower mandrel-section, m, the feed-rollers ff, and the upper ends of the open jaws J J.

To and for a short distance below half-stroke t the upper part of the mandrelslide S moves with the remainder by its own gravity. The lower ends of the guides to arrest it in proper position for the end lapping and welding operat-ions represented by Fig. 4, and during the 0 completion of the stroke the slide and mandrel open to the extent represented in Fig. 9

'and in dotted lines inFig. 3. Immediately before the completion of the stroke the lower bend of the link comes in contact with the 5 thrust-bar T, and as the stroke is completed motion is thus transmitted from the mandrelslide to the sliding frame 0, which, by its camrecesses c c and the tappet projections 19' i on the jaws J, presses the latter against the sides of the mandreland clamps the bentlink-blank tightly preparatory to the said end lapping and welding operations. The retractingsprings S are put in tension, moreover, the cushioning-springs S are compressed, and the l e-elevating hand-lever H, Figs. 1' and 5, is left in its lowermost position. Finally, at the conclusion of the stroke the cross-head X comes inv contact with said tappet-slide T, and by its coacting cam-surface a, through said tappetslide T, lever L, slide-bar S, and fork Ff,

unclutches the clutch-slide C, as represented by dotted lines in Fig. 3, and stops the machine. The hammer H is now dropped,with the end lapping and welding effects illustrated by Fig. 4. The descending hammer first acts on the upper tappet-slide, T, and through this i and the lever L actuates the left-hand end lapping pusher, P, and thereby bends over the'left-hand end of the linkblank l, as shown in full lines in the figure. A moment later, as

represented by broken lines, the hammer H the lapped ends together and securely welds them. The hammer H is at once re-elevated,

which restores the upper part of the machine to normal condition. The man on the 5 left-hand side of the machine now raises said hand'lever H, assisted by said springs S, and thereby partially re-elevates said sliding frame 0 and thrust-bar T, elevating therewith the welded link Z, and with the latter, of necessity, the lower part of the mandrelslide, lifting the weld end of the link above and clear of said mandrelsection m, and so that the edges of the weld are in line with the finishing-hammers H H, as illustrated by Fig.

6. The man on the right-hand side of the machine now moves the hand-lever H so as to clutch the pulley E with the driving-pulley P, and motion isimmediatelytransmitted,through the band F, pulley-disk D, rod R, and disks D D, to the front and rear crank-shafts, U0, and therefrom, through the rock-frames R R, to the front and rear finishing-hammers, HH, causing them to strike the weld'edges simultaneously and drive in any fins or swells formed thereon at the welding operation. A reverse movement of said hand-lever H by I the same man unclutches said pulley E and stops the finishing-hammers, which are made to rest in retracted position, as shown in Figs. 2 and 7. Finally, the man on the left-hand side of the machine pulls the hand-lever H", which, forcing in the tappet-slide T", actuates the fork F", and theret-hrough throws the cl utchslide O into mesh with the loose driving-pulley L and causes the main shaft M to be started again. This, through said crankwheel W and i pitman P, fully re-elevates the mandrel-slide, the mandrel collapsing as it rises to the point hereinbefore indicated, after which the anvilsection in of the mandrel again comes into contact with the upper end of the link and lifts the finished link l between the retracted jaws J J to the position in which it is represented in Fig. 7, where it hangs loosely upon the mandrel, as indicated. The mandrel is now in its uppermost position, as aforesaid, and is here stopped automatically by the coaction of said cross-head X with said tappet-slide T the latter, through said fork F", retracting said clutchslide U and restoring the machine to its condition of rest. The man on the lefthand side now removes the finished link from the machine while the man on the right-hand side introduces another straight blank, and thus the operation proceeds. I have described somewhat in detail my machine as shown in the drawings, which illustrate the best means now known to me for producing the effects and carrying out the modes of operation of my invention, apart .from mechanical details of construction, ad-

justing devices, and the like, which I have not 1 considered it necessary to represent, as they .form no part of this invention, and the machine admits of numerous modifications in i form and arrangement of parts, and the em- .,ployment of known mechanical substitutes within the scope of my invention, as hereinafter claimed.

Having thus described my said improvement in machines for bending and welding links, I claim as my invention and desire to patent under this specification-- 1. The combination of the loose drivingpulley L, clutch-slide G", shaft M, crank-wheel WV, pitman P, and vertical mandrel-slide S, the latter carrying a bendingunandrel on its face, with the horizontal feed-rollers ff, and

the open jaws J J, below said rollers. substantially as herein specified, for bending astraight link-blank to U shape, in the manner set forth.

2. The combination of the vertical mandrelslide S, carrying a bending-mandrel on its face, the vertical thrustloar T, the sliding frame 0, having canrrecesses in its uprights, and the jaws JJ, pivoted at their lower ends and having tappet projections engaging with said camrecesses, substantially as herein specified, for clamping the bent link-blank laterally, in the manner set forth.

3. The combination of the drop-hammer H, tappet-slides T T, levers L L, and pnshers P P, with their appurtenances, and the upper part of the vertical niandrel'slide S, supported by its ways beneath said hammer, and having an anvil-section of the bending-mandrel upon its face, substantially as herein specified, for lapping the ends of the linkblank, one over or upon the other, and welding them together, in the manner set forth.

4. The combination of the hand-lever H,

sliding frame 0, thrust-bar T, and cushioningspring S, with the lateral jaws J J, and vertir.

cal mandrel-slide S, substantially as herein specified, for loosening and partially re-elevating the welded link, in the manner set forth.

5. The combination of the parallel 'cra'nkshafts G 0, rock-frames R R, and finishinghammers H H, with a driving-shaft, clutch, band and pulleys, and connecting-gear for driving said crank-shafts simultaneously at will, substantially as herein specified, for finishing the links, in the manner set forth.

6. The combination of the loose drivingpulley L, clutchslide C shaft M, crank-wheel- \V, pitman P, and vertical mandrel-slide, S,

the latter having on its face a vertically-collapsing mandrel, the upper section of which carries the finished link upward and supports it loosely until it is taken from the machine, substantially as herein specified.

7. The combination, in an upright machine for bending and welding links, of a horizontal pair of feed-rollers, a vertical mandrel-slide carrying a combined bending-mandrel and anvil on its face, and a pair of clamping-jaws for bending a straight link-blank to U shape, and holding it tightly in this shape, with a pair of end-lapping pnshers and a weldinghammer, substantially as herein specified, for

making a lap-weld link, in the manner set welding links, the combination, witha vertical mandrel-slide, of the cross-head X, tappetslide T, fork F, and clutch-slide C, substantially as specified, for automatically unclutching the shaft which drives said mandrel-slide from its driving-pulley at the end of each bending-stroke, in the manner set forth.

9. In an upright machine for bending and welding links, the combination, with a vertical mandrel-slide, of the cross-head X, tappetslide T", fork F", and clutch-slide O", substantially as specified, for automatically unclntching the shaft which drives said mandrel-slide from its driving-pulley at the end of each return-stroke, in the manner set forth.

10. In a machine for bending and welding links, a combined mandrel and anvil carried by a two-part slide, and itself divided transversely, substantially as herein specified, the

bending-section of the mandrel being adapted 20 JAMES I. OHEESMAN.

Witnesses:

LEVI CLABAUGH, MICHAEL SoHENoK.

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