US1111729A - Bolt-heading machine. - Google Patents

Description

J. R. BLAKBSLBE.

BOLT READING MAOHlRE.

APPMOATIOI nun oor. xe. um.

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iiii %'EATE PATENT @FFEQE JOHN R. BLAKESLEE. F CLEVELAND, OHIO, ASSIGNOR TO THE AJAX MANUFACTUR- ING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

BOLT-HEADING MACHINE.

Specification 01 Letters Patent.

Patented Sept. 29, 1914s Application tiled October 18, 1911. Serial No. 655,872.

'1 'u all whom it may concern lie it known that I, JOHN R. Biiakasnnn, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State. of Ohio, have invented a new and useful Improvement in Bolt-Heading Machines, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contem ilated applying that princitiistinguish it from other in- In the operation of heading dies, in which the forming die and upsetting die, proper, are independently movable, so as to permit such forming die to be advanced into position to inclose the stock that is to be upset prior to the advance of the upsetting die, more or less dilliculty is experienced in disengaging the freshly formed head from the die. In machines of this class, it will be understood that ordinarily a section of stock of sufiicient length to form the particular bolt, or other article being manufactured, is cut oti from the rod or bar before the head is formed in the fashion just described. Accordingly, when the header slide is retracted, the head of the bolt will tend to stick in the die and be carried with it, thus interfering with the formation of the next successive bolt, as should be obvious.

The object of the resent invention is to so construct two'part orming dies, of the type referred to, as to eliminate the difficulty in question, and to the accomplishment of this and related ends, said invention consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawings and the following,' description set forth in detail certain mechanism embodying the invention, such disclosed means constitutin however. but one of various mechanical orms in '"hich' the principle of the invention may he used.

in said annexed drawings :-Figure 1 is a broken plan view of a forging, or upsetting, machine embodying my present im )IOVG- meats; Fi 2 is a central vertical section of said machine showing the parts in the same position as in Fig. 1; while Figs. 3, 4 and are similar cross sectional views but showing the arts in operative positions respectively difi'crin from each other and from that shown in ig. 2.

Most of the details of the construction-of the machine frame 1 have been omitted from the foregoing figures as inessential, as also the driving connections for the crank shaft 2 which is mounted on said frame in the usual fashion. At the farther end of the frame. from said shaft, is located the feed opening, 3 through which the stock is adapted to be fed between the grippim dies 4 and 5, the latter of which is movablb relatively to the other to cut oil the portion of the stock that protrudes through the feed plate 6. Such cut-off section of stock is then finally gripped between said movable die 5 and the one 4 that remains stationary, so as to he held in line with the head forming mechanism. This mechanism, which is of present interest, is designed to be operated )y the crank shaft 2 and comprises in the first place, a slide correspondin with the ordinary header slide or machine of this class, but made u i of two arts 7 and 8. Of the parts of the slide, the list one is adapted to he reciprocated bv means of cams i) and 10 of which two pairs are provided, one pair 10 being arranged to advance said slide and retain the same for a predetermined period of time in advanced position, while the other pair 9 co-acting with opposed faces on rearward extensions 11, 11 of the slide, is adapted to retract the slide. The other slide part 8, which is mounted on the main slide 7, preferably in a central longitudinally extendin recess 12 in such slide, is reeipr0 cated y the crank shaft 2 through a connecting rod 18 of the usual construction.

From the foregoing description of the operative connections between the slide parts and the shaft. it will be seen that a regular reciprocatory movement. is im mrted to the inner smaller slide part, whi e the larger slide part, which incidentally supports said smaller part, is advanced and held in ad vanced position and then retracted, quite independently of the movement of the smaller slide, (so as to move faster and also be retracted farther than the latter) although the movements of the two slides are synchronized, as will he presently explained.

Secured to the forward end of the small slide part. by a suitable clamp collar 1-1 and set bolt 15, is an extension it) preferably cylindrical in form. that is of reduced diam eter at its outer end. and furthermore formed with an annular recess just back of such and. so as to provide an undercut head 17. This extension projects through an opening in the forward end of the larger slide and into a is lit sleeve 18 that is secured to such larger slit es forward end by a removable cap plate 19. Sleeve 18 is formed with an enlargement 20 at its forward end that forms a holder ada ited to receive a forming die .21, such die being secured therein by means of a set bolt 22, and being thus readily exchangeable with others of dillerent size bore. The bore in iuch die, it will be understood, is of the form and sizewhich it is desired to give to the bolt head in a transverse plane. There is also supported in the sleeve 18, an upsetting or heading tool 28, the forward end of the latter extending into the bore of formmg die 21, while its rear end has a recessed or undercut head 24 similar to the head at the forward end of the extension 16. The tool is secured to the header extension by iiieui Of a Split collar 25 having an internal circular recess, that, when the two portions of t he sleeve are drawn together, fits snugly around the junta osed undercuthcads in question and thus ocks the parts together.

Haviu thus described, with what is belies-ed to he sutiicient particularity, the con struotion of my improved machine, its general mode of operation may now be set forth. As has already been indicated, the stock, in the form of a rod or bar, is suitably fed through the feed opening 3 and between the gripping dies 4 and 5, so as to have the proper length of material project beyond said dies, as shown, for example, in

Figs. 1 and 2. Thereupon the movable gripping die is caused to cut oil such pro- Jeeting portion of the stock and firmly press the same against the fixed die. Incidentally to the foregoing, the advance moven'ient of the main header slide 7 begins, by reason of the engagement of cams 9 with the correspniltllllt! faces on said slide. At. this stage, the inner slide 9 is in its completely retractcd position, and while its advance begins siniultaaemisly with the forward movement of the larger slide part, its movement is ilmver, so that. such larger part with the sleeve and forming die carried at its forward end is advanced into the position shown in iiig. 3, before the inner slide with the extension thereof which carries the upsetting tool, has been advanced to bring the latter into contact with the stock. The cams, however, which advance the larger slide retain the latter in such position until the inner slide with the heading tool, catches up, as it were, the result of this being the upsettin of the portion of the stock that is inclose Within the forming die, as shown in Fig. 4. The return movement of the slide parts'now begins, but here again the movement of the enter, larger slide part is more rapid than that eat the inner slide, so-that as a result, thealeeve and forming die are drawn back more rapidly, as well as farther, than the e:\'- l;

tension which carries the upsetting tool. Such upsetting tool, accordingly, is left projecting as shown in Fig. and as a result it will be obvious that the bolt head is forced or pushed out. of the forming die. so that the bolt is left free to drop, and any tendency which it might have to stick in the forming die is eliminated.

Other modes of applying the principle of my invention may-be employed instead of the one. explained, change being made as regards the mechanism herein discl sed, PT vided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctlv claim as my invention 1. n mechanism of the class described, the combination with means for gripping the stock; of a forming die; an upsetting tool reciprocable within said forming die; 3

and means adapted to positively reciprocate said die and tool both relatively to the stock and independently of each other, said means being arranged to retract said forming die farther than said upsetting tool.

2. In mechanism of the class described, the combination with means for gripping the stock; of two independentl' reciprocable slides; a forming die cart-1e by one of said slides; an upsetting tool carried by the other of said slides, said upsetting tool being reciprocable within said forming die; an means adapted to reciprocate said slides both relatively to the stock and independently of each other, said means being arranged to retract said first-named slide farther than said last-named slide.

3. In mechanism of the class described,

the combination with means for gripping the stock; of two independently reciprocablc slides; a forming die carried by one of said slides; an upsetting tool carried by the other of said slides, said upsetting too being reciprocable within said forming die; cams adapted to reei rocate said first-named slide; and a cran connected to reciprocate said last-named slide, said cams being arranged to advance and retract the slide operated thereby more ra idly than said crank operated slide, and a so to retract its slide farther than said crank-operated slide.

4. In mechanism of the class described, the combination with means for gripping the stock; of a main slide; a second slide carried by said main slide and reciprocable thereon in the direction of reciprocation of said main slide; a forming die carried by said main slide at its forward end; an upsetting tool carried by said second slide and extending within said forming die; a crankshaft having its crank connected to regularly reciprocate said second slide; and

cams on said shaft adapted to intermittently I yg reciprocate said main slide, said cams being arranged to advance said formin die more rapidly than said upsetting too, retain the same in advanced position, and then retract said formim die more rapidly, and also farther, than said upsetting tool.

5. In mechanism of the class described, the combination with means for gripping the stock; of a forming die; an upsetting tool reciprocable within said forming die; and means for positively reciprocating said die and tool independently of each other, said means being arranged to advance the forming die faster than and beyond the upset- 1.) ting tool to retain the forming die in advanced position and simultaneously to advance the upsetting tool to the stock, and then simultaneously to retract the tool and to retract the forming die faster than and beyond the upsetting tool. a 6. In mechanism of the class described, the combination with means for gripping 1,11 was the stock; of two independently reciprocable slides; a forming die carried b one of said slides;anupsett1n tool carrie b the other of said slides, sai upsetting too being reciprocable within the forming die; cams adapted to reciprocate the first slide; and a crank connected to reciprocate the second slide, said cams and crank bein arranged to reciprocate their respective sides so as to advance the forming die faster than and beyond the upsetting tool, to retain the forming die in advanced position and simultanously to advance the upsettin tool to the stock, and then simultaneous y to retract the tool and to retract the forming die faster than and beyond the upsettin tool.

Signed by me this 16th day of %ctober, 1911.

JOHN R. BLAKESLEE. Attested by- ANNA L. GILL, JNO. F. OBERLIN.

Copies of this patent may be obtained for a" cents each, by addressing the Commissioner of Era/teats,

Washington, D. 0.

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