US88493A - Improved machine for making bolts - Google Patents

Description

2 sheets -shet- 1.

11B. LOGKE. MAGHINE FOR MAKING BOLTS.

No. 88,493: Patented Mar. 30, 1869.

, 2 Sheets-Sheet 2.

'E.B.LOOK E. MAGHINE FOR MAKING BOLTS.

Patented Mar". 30, 1869.

EDWIN B LIOCKE, OF EXET'E'RpNEW HAMPSHIRE.

Letters Patent No. 88.493, dated M 30, 1869.

IMPROVED MACHINE FOR MAKING BOLTS.

The Schedule referred to in these Letters Patent and making part of the same:

To all to whom these presents shall come:

Be it known that I, EDWIN B. LOCKE, of Exeter, in

the county of Rockingham, and State of New Hampshire, have made an invention of an Improved Machine for Producing Bolts, Rivets, 850.; and do hereby declare the following to be a full, clear, and exact description thereof, due reference being had to the accompanying drawings, making part of this specification,

and in which-- Figure 1 is a perspective view, and

Figure 2, vertical and transverse sections of the machine, taken through the forming dies, to be hereinafter explained.

Figure 3,.a vertical and longitudinal section of the machine, talien through the beater for forming the bolt: heads, to be: referred to hereafter.

The constituent parts of the machine comprising the v subject-matter of these Letters Patent consist of invstrumentaiitfes for seizing the material, and grasping the body of a bolt, rivet, or other kindred article, and of forming a head thereupon, as well as of a device for cutting the bolts, &c., of the desired length, the latter trough, or guide, in which was disposeda sliding plunger, the trough first advancing to the dies,.andenc1osing a portion of the iron rod designed for forming the head of the bolt, and the plunger subsequently advancing within the trough, and condensing or compressing such metal therein, and by this means completing the head of the bolt. I I

'This arrangement.of parts is to a considerable extent complicated aud clumsy, and. one object I have had in view in organizing my present machine, is to avoid several objections incident to such construction of parts.

My invention further relates to means for obtaining a morepo'werful action upon the movements of the forming-die than has heretofore been accomplished.

The invention consists- First, in the construction of the forming-dies, whereby such dies are compelled to form the body of .the bolt, to hold it securely in position while heading it, and to constitute a chamber, or enclosure, within which to form the head of such hoit, the beating up or forming of such head being effected by means of a sliding bar, or heater, mounted upon and carried by a movable carriage, the reciprocating movements of such carriage being efi'coted by means hereinafter explained.

Secondly, the invention consists in the employment of two sliding bars, provided with cam-grades, of different-ial angle and power, one of such grades being intended to effect a quick movement of the movable die when approaching its mate, and when little power is required, and the latter being to complete such movement when forming the bolt-head, with a great increase .of power, the same being as hereinafter described.

Referring to the drawings, before mentioned as accompanying'this specification, and which illustrate my invention, the reader will see thatthe machine is denoted by the letter A, as composed of a suitable bedplate, or table, a, supported upon four legs, I) b bl), the frame thus constituted possessing sufficient solidity and strength to'support the operative parts of the machine.

The driving-shaft of the machine is shown at B, as mounted transversely upon the rear end of the table a, and supported in suitable bearings O G, erected thereupon, such driving-shaft carrying'upon its outer end a suitable driving and fly-wheel, D.

The dies for forming the bolt are shown at o o',,the former being the stationary, and the latter the movable die.

- ,These dies are each divided into two portions, d c andd e, of which the former constitute the headingportion, and the latter the portion for supporting the shank of the bolt. 1

--.'The stationary die 0 is disposed within a box or'enclosure, f, erected upon the forward part of the ma chine-bed, and to one side of its centre, while the die a is supported within a sliding carriage, d, playing 7 within an enclosure, or guide, it, making'part of the 1 machine-bed, in such mannerasvto be caused to approach and reoede from the stationary die 0, the two dies 0 and 0 being counterparts of each other, and in horizontal and longitudinal alignment with each other.

The reciprocating rectilinear movements of the car- 'riage g are elfected by two sliding-bars U, which are disposed upon the upper surface of the machine-bed, and at right angles with the driving-shaft thereof, the outer or forward end of these bars beingformed with cam-grades It I, to impinge against two inclined faces an it, formed upon the rear side of the movable die carriage 'g- The two bars 11 j placed alongside of each other, and with their rear ends in alignment with two segmental cams o 1), fixed upon' the driving-shaft D, such sliding bars being retracted toward such cams, and away from the die-carriage, by springs, suitably applied to their under side, and to the machine-frame, v the bar j being so'situated, with respect to its fellow and the two cams 0 p, as to be first advanced, and produce a portion of the advance movement of .the movable die, the subsequent advance of the bar t completing such movement of the die. g

The cam-grade Z of the barj, and the inclined face n of the carriage g, are of such respective angles as to produce a sudden and quick partial forward movement of the movable die toward its mate, while the cam-grade 7:. and inclined face I are disposed at such an acute angle, with respect to each other, as to complete the movement of the-die at a much slower rate of speed,,but with greatly increased power, it being understood, and will be seen by referring-to the accom pan ying drawing, that the outer bearing of the bar j is its fellow-bar 'i, while the outer heal-ingot the laiter is the outstanding rim, or ledge whichfpartiallyeuclnses the carriage g.

The retraction of the sliding carriage is caused by a spring suitably applied to it, and to the-ledge last mentioned, or by any suitable means.

The sliding carriage, carrying the header for forming the head of the bolt, is shown at E, as disposed upon the top of themachine-bed, and sliding within ways, or guides f f, formed thereupon, such carriage being disposedat right angles to the driving-shaft, and a plunger, or heading-tool, G, suitably combined therewith, the disposition of the sliding carriageand its header being such, that the latter shall be-iu axial a-ligmnent with the recesses of the dies 0 c, the heading-portion of such recesses being of such a size, with respect to the plunger, as when in contact with each other, to be filled by it.

The reciprocating movements of the sliding carriage E are effected as follows:

A vibrating arm, 8, is pivoted to one side of the said carriage, and with its rear extremity in alignment with a cam, t, fixed to the driving-shaft, a revolution of such cam, by means of the arm s, having the effect of advancing the plunger G, the retraction of such plunger or its carriage being eEect-ed by a spring, a, suitably applied to its under part, and to the machine-bed, or

by any suitable means. The peculiar disposition of the vibrating arm 8, with' respect to the cam t, enables great power .to be had over the plunger, the advance of such plunger within the head-receiving portions (1' d of the. dies being carried so far, with respect to the shank portion thereof, asto form a head upon the bolt of any desired depth, the plunger beingapplied to its carriage in an'adjustablc manner, in order to vary the extent'of its entrance within the dies, in order to produce heads'of varying depth.

The disposition of the cams 0, p, and t,with respect to the sliding bars t' and j, and the carriage E, are such that the former shall first cause the dies to meet, and the plunger subsequently to enter such dies, and form the head of the boltgthe sliding bar 6, during such process of heading the bolt, serving, with the aid of the ledge 71, before mentioned, as a solid, unyielding abutment, to maintain the dies in contact.

The above-described combination and organization of parts comprise the principal features of-my invention, and serve to form a bolt.

To enable mechanics, to whom this specification is chiefly addressed, to understand its operation, the following brief description will suffice.-

A rod, or barof iron, at a red heat, is'to be inserted. between the dies 0 and c, and so far'into the headportions thereof practice shall determine proper for giving the requisite head to the bolt. A revolution of the driving-shaft, by means of the cams 0, p, and t, first closes the dies, and grasps thestem, or body of the bolt, and subsequently advances the'plunger, and prodnces't-he head. of such bolt. .lhe passage of the said cams'past thc'bars ij, and the carriage E, allowing such parts, and the die-carriage g, to return to their normal positions, as shown in fig, 1' of the drawings.

The dies' 0 c may-be so constructed as to seq-er the bolt from the bar, orbIank simultaneous with the act of'fiu-miug it, in which case the bolt, upon separation of the dies, would fall through an orifice, u, made in the machine-bed, below such dies; This, however, wonld'prmluce bolts of unvarying length, which, in practice, would not be desirabl The secondary, or incidental features of my invention, as before premised, consist of a cutter, adapted for convenience in cutting bolts of rcquisite' length.

1-1, in the accompanying drawings, denotes a sliding carrier, supported upon the front edge of the machinebed, to one side thereof, and parallel, or thereabouts, to the axis of the driving-shaft. To such carrier H, I

and): a shearing-plate; while in alignment therewith, I

atfix to the abutment, or extension 3 before mentioned, a second shearing-plate, a, the two plates serving as shears, to cut the boltsdnto requisite lengths.

The advance of the sliding carrier H is effected by a sliding bar, I), disposed upon the upper surface of the machine-bed, and to one side of the boxy, before mentioned as containing the stationary die 0, such sliding bar being disposed alongside of a secondsliding bar, a", and the two being supported in suitable guides, or ways (1 d, and operating in connection with two wiper-cams, e f, Figiue 4, fixed to one extremity of the driving-shat't, in such a manner that, upon a revolution of such cams, the bar I) shall first advance, and by impinging against the carrier H, advance such carriage, and its cutter, while the bar a shall subsequently retractthe carrier to its normal position.

To accomplish these movements, the forward extremity of the bar I), and the inner face of the carrier H, are formed with angles, or inclined grades g h.

In like manner, the sliding bar 0 is formed with an angular termination, 'i, to work withina corresponding shaped recess, formed in the rear face of the punchcarrier. H.

The retraction of the bars bc is efiected by springs k k, or other means suitably applied.

To adapt the machine above described to making rivets, which it is well known are provided with round, convex heads, the heading-dies d d are to be changed for others, suitably formed, to present such shaped heads.

This change maybe made very expeditiously, and with little trouble, and in-this respect my machine possesses great advantages over'others in use.

I would call the readers attention to the fact that the beater, or'plunger G performs another important oflice, in addition to-that of forming the head of the bolt, that is, it serves as a gauge to regulate the insertion of the iron rod within the dies, in order to produce heads of different depths.

The plunger-carriage, in addition to the movement which forms the head, has a preliminary and short movement imparted to it by an auxiliary cam, Z',*fixed to the driving-shaft, alongside of the cam t, the said cam impinging against the rear end of the carriage,

and being so situated, with respectto the cam t, as to cause a short movement of the carriage and plunger, in advance of the general movement eflecte'd by such cam 27, this preliminary movement of the plumger bringing it to such a position that theiron rod,

upon being introduced between the dies, shall abut against it, and, as before observed, determine the proportionable amouutof such rod to be admitted to form the head of the bolt. As the plunger is applied to its carriage in an adjustable manner, this advance of the plunger may be varied at pleasure.

Ola/Ems.

I claim as my invention, and desire to secure by Letters Patent of the United States, as follows:

1. I claim the arrangement and combination of the sliding bars taud j, 'with the carriage g, the former being provided with the differential cam-grades 7t and l, and the latter with the inclines-m and u, the whole operating in manner and for the purpose as before explaiued.

2. I claim, as a means of operating tl'ie'cutter carrier H, the combination and arrangementpf the bars I) .aud cfl such bars being inclined upon their forward

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