US1119491A - Mechanism for making bolts. - Google Patents

Description

J'. R. BLAKESLEE.

MBGHANISM FOR MAKING BOLTS. i

APPLIGA'MON FILED MAR. e, 1911.

l l 39AM, Patented Dec. 1, 1914.

Patented Dec. 1, 1911,

2 SEBETSSHBET 2.

R. BLAKESLEE.

APPLICATION FILED MAR. 6, 1911- MECHANISM FOR MAKNG BOLTS.

Unrrnn srarns earn f u JOHN n. BLAKnsLEE, or CLEVELAND, omo, nssielvon To THE AJAX MANUFACTURJNQ COMPANY. or CLEVELAND, oHIo, A c onronarron oF omo.

MECHANISM FOR MAKING BOLTS.

1,119,491. Specification of Letters Patent. Elgpbgn'ged De@ L ggo Application filed March 6, 1911. Serial No. 612,439.. I

To aZZwzomit may concern.' nism embodying the invention, such dis- Be it known that I, Joni: R. BLAKESLEE, closed means constituting, however, but one a citizen of the United States, and a resiof various mechanical forms in which the dent of Cleveland, county of Cuyahoga, and principle ofthe invention may be used.

State of Ohio, have invented a new anduse- In said annexed drawings z`l`igure l is 6o ful Improvement in Mechanism for Making a plan view of so. much of a heading ma; Bolts, of which the following is a specifica- ,chine as is required to illustrate the prestion, the principle of the invention being ent invention; Fig. 2 is a central vertical herein explained and the best mode in which vsection thereof talrenon the line 2`2, Fig.

I have contemplated applying Athat princil; Fig. 3 isa front elevational view of the 65 ple, so as to distinguish it from other invenheading tool; while Figs. 4 and 5 illustrate tions.v 1n more or less diagrammatic fashion, dif- In the upsetting of bars or rods to form ferent operative positions of said heading heads'onto bolts or like articles, the practool with relation to the work being opertice heretofore hasbeen to employ a headu ated upon. 7g ing tool wherein the concavity corresponds It has not been deemed necessary to illus` exactly with the form and dimensions of trate the general frame, or' bed l, upon the head. Thevrod or bar is then advanced which the several parts concerned in the between the gripping dies wherein it is held present invention are supported other than just the proper distance to leave enough isnnvolved in the sectional illustration of 75 metal projecting to ll this eoncavity, when l3`1g. 2; the parts in question include, then, the header is forced up against said griptwo relatively transversely `movable -ripping dies. Since the shape or transverse ping dies 2 which have their inner aces section of the head does not correspond with formed with complementary recesses 3 that of the-body of the bar, where,for ex# adapted to receive and gripthe work, when So ample, the head is square or hexagonal and said dies are forced together. Movable lonthe body round, there is a tendency for the gitudinally of the line of feed of the work metal, as it is thus upset and compressed or, in other words, transversely of such diwithin the die space, to escape from between rection of relative movement of the dies 2, l

0 the subsequently contacting faces of the is the header slide 4 shown in fully ad-v s@ heading tool and gripping dies and thus to 'vanced position 1n Figs. 1 and 2. This form a lin around the lower edge of the header in the present improved construction smaad which requires to be trimmed oil-` later. is provided with a forwardly extending A Not only does the extra operation thus in bracket 5 within which is reciprocably 5 volved in forming a finished bolt, or like mounted the heading tool 6.. Movement or Q0 article, increase the expense, but there is said tool relatively to the head is limited by also the possibility that the die-space inthe stops 1n the form of projecting lugs 7 lthat heading tool will not be completely filled, lit in corresponding longitudinal slots 8 thus leaving the head misshapen. By the in the extension 5 in question. A springl present invention, however, I have provided 9 disposed within a recess 10 in the header 95 improved mechanism for upsetting the end slide behind the tool 6, tends to advance the of a bar or rod to form a head thereon, same into its forward limiting position, whereby the tendency to form fins, or in` while contrariwise a catch ll mounted on other words, for the metal tovescape from the upper face of the slide, is adapted to l between the gripping dies and heading tool, engage the correspondingly disposed stop-l loo is substantially entirely eliminated, thus pin 7 on the tool to retain the latter in its rendering it possible quickly and by a single retracted position. operation to form a complete and satisfac- Catch ll is mounted on an oscillatory tory head. shaft l2 that projects to one side of the head To the accomplishment of these and reand there bears a rock-arm 13 provided with 105 lated ends, said invention, then, consists of a lateral projection at its freel end. A cam the means hereinafter fully described and 14 lies vin the path of travel of the projection particularly pointed out in the claims. and the latter rides up on the upper faceof The annexed drawings and the following the cam during retraction of the slide and description set forth in detail certain mechathus rocks the catch l1 from engagement 1i@ with stop 7, so that tool G may be moved Clt into forward position by spring 9. 'lfhe body oi said tool is bored out to receive' tivo die members l5 onto which it is then shrunk so as to securely hold the same in place. A passage 16, however, is desirably left loetiveen these members and the tool body for circulating water or other cooling l'luid around the assembled die. These die members torni an opening 17 of transverse sectional .shape corresponding with that of the head which it is desired to torni. As illustrated A(see lfig. 3l, such opening and head are square, but the opening may be of hexagonal or other shapes. Lying within the bore provided between said die-members is a close-fitting plunger 18, the rear end olf which is secured in the body ot' the slide so to be held against longitudinal movement; the heading tool, however, is reciprocable reiathely to said plunger, so that, 'While inthe retracted position of the tool, the plunger entends almost to the forward end of the bore., in the advanced position oi' said tool relatively lto the head (this 'posiu tion .being assumed upon the retraction of the head), said plunger lies at some dis tance to the rear, as shown in -liig. e. Such Fig il represents in ei'eet the inoperative position ci the parts, that is, the position which they assume just prior to the forward movement of the head. The relative posi tion of the plunger Within the die opening of the heading tool remains unchanged until the latter is broughtup against the face o'l the gripping dies, as illustratedin lliig. 5. lliiny further advance olf the head Will now force the plunger forwardly Within said tool, untillinally it reaches the limiting position ol' Fig. f2'. 'lhe eliect of this same movement is to ucomprees the spring l) behind the tool, forcing said tool into the head until it is loclied by engagement of the catch 1lwith the 'pin Y. y

The general *finde otop'eration of the mecl'ianisin illia'rated 'for carrying on my improved method oi heading bolts and. the like should cleailvy appear from the foregoing descriptiini. l't is to be noted, hovvevcr, that by reason of the construction of such mechanism the projecting yportion oi' the bar 20 which is to be upset is preliminarily" entirely inclosed within the hollow heading tool; then the upsetting plunger, proper, advances en such projecting portion, forcing it down into the compass and shape it is designed to receive for the 12in.- ished head. es a perfect inclosure,y however, provided, none ci the metal tlzusebedenier.- o.'

ing upset can escape, and as a result the head has none of the objectionable fins or projections hereinbefore referred to.

rl'he operation ot' the mechanism is obviously just as simple and expeditious as Ain the case of the prevailing type ol construetion and the adjustment of the machine for the formation of dillerent kinds elf heads substantially as readily effected.y

cured to said slide and projecting toward said gripping dies, said bracket being .provided with a longitudinal bearing and with a longitudinal slot; a heading tool reciprocably 'fitted in said bearing and adapted to abut against said gripping dies, said tool havinga. bor: adapted to inclose the stock andA ol the cross-sectional form desired; a pinA secured to said tool. and extending out- Wardly through said slot; resilient means` tending to advance said tool; 'a catch secured to the slide and adapted to engage said pin when the slide is ,in advanced position; means for releasing said catch during re-v traction oli' the slide and an upsetting plunger ixedly secured to said slide and reciprocably fitted in the bore of said tool.

Q'. In mechanism of the lclass described, the combination with dies for gripping the stock g` of a reciprocable slide; a headingltoolv reciprocably mounted on the slide and` adaptedto abut against the gripping dies, Vthe tool having a bore adaptedto inelose the stock and oi the cross-sectional form d sired; resilient means tending to advance the tool; a catchseeured to the slide and adapted to engage the tool when the slide is in advanced position ymeans for releasing the catch during retraction of the slide; and an upsetting plunger ixedly secured to the slide and reciprocably fitted in the bore of the tool.

Signed by ine this lith. day of Maitell, 1911.

, JOHN' R. BLAKESLEE. wgtested by# l ANNA L. GILL, also. F, Unterm.

se "a, by addressln the Commlsscner et llaten'e

Images