US341971A - Machine - Google Patents

Description

(No Mudel.) 2 sneets-sneet 1. W,.E. WARD.

BOLT BLANK MACHINE.

No. 341,971. Patented May 18, 1886l (No Model.) z'sheets-sheet 2j W. B. WARD.

BOLT BLANKMAGHINE.

No. 341,971. Patented May 18, 1886s iran *raras v arnwr rricn.

VILLIAM E. VARD, OF PORT CHESTER, NEW YORK.

BOLT-BLANK MACHHNE.

SPECIFICATION forming part; of Letters Patent No. 341,971, dated May 18, 1886.

Application filed December 24, 1885. Serial No. 186,593. (No model.)

To a/ZZ whom ii may concern.-

Be it known that I, WILLIAM E. WARD, a citizen of the United States, residing at Port Chester, county of Westchester and State of New York, have invented a new useful Improvement in Machines for Forming Bolt- Blanks from Cold Rods of Metal; and I do hereby declare the following specification, taken in connection with the accompanying drawings, forming a part of the same, to be a full, clear, and exact description thereof.

In another application for Letters Patent, for an improvement in machines for forming bolt-blanks from cold rods of metal, I have described a machine the novel characteristic of which is that the rod of bolt-stock is fed forward more than once during the formation of the bolt-head,and the headingrarn is made to advance more than once to upset the end of the rod, whereby, as a result of a succession of feeding, gripping, and upsetting' operations, a complete head of large size relatively to the diameter of the rod-stock will be progressively formed on the end of the rod.

The present invention is to accomplish the same result in kind by a different combina tion of devices; and it consists in the employment of a headingram, to which more than one advancing movement is given, for upsetting the rod-stock, in combination with gripping jaws or dies for holding the rod during the operation of forming the bolt-head, which jaws or dies are made in sections, so that by the withdrawal of a die-section after an upsetting operation has been performed there will be an exposure of a portion of the length of the rod-stock corresponding with the thickness of suchremoved die-section, whereupon a second advance of the headiugram will be able to further upset the end of the rod or complete the bolt-head.

In the accompanying drawings, Figure 1 represents in longitudinal vertical section a machine embodying the invention. Fig. 2 shows a transverse section of the same through line X X, Fig. l. Figs, 3 and 4 represent transverse sections of the machine through the line Y Y, Fig. 1, showing, respectively, a removable section of the jaws or dies in open and closed positions. Fig. 5 represents in side elevation the cam and lever for closing the` main gripping jaws or dies. Fig. l5 shows in perspective the main gripping jaws or dies, the removable sections of the jaws or dies, and mechanism for closing and opening the latter. Figs. 7 and Srepresent, respectively,v a face view anda vertical section of the dieblock, which is secured to the ram-head, and is provided with a matrix for shaping the head of the bolt-blank. Fig. 9 represents a side View of one ofthe main gripping-dies and one of the removable die-sections, and the fullyheaded rod fed forward against a stop or gage preparatory to severing the bolt-blank from the rod. Fig. 10 shows a side View of one of the main gripping-dies and one ofthe removable die-sections with the rod projecting beyond the front face of the latter in readiness for the first upsetting operation. Fig. 11 represents the rod in one of the main dies, and one ofthe removable die-sections with the rudimentary bolt-head formed on the end of the rod by the heading-die. Fig. 12 represents the rod in one of the main dies, with the completed head formed on the end of the rod by the heading-die. Fig. 13 shows the completed blank. Fig. 14 represents a side View of the cam for producing the forward movements of the heading-ram. Fig. 15 shows a side View of the cam for working the arms or levers which engage the removable die sections.

The machine shown in Fig. 1 of the drawings is mainly the ordinary bolt-heading ma` chine modified by the addition of means and devices whereby the mode of operation which is the characteristic of my improvement can be accomplished.

A represents the frame of the machine, upon which the several parts are mounted.

B is the heading-ram, which obtains its forward movements for upsetting theend of the rod and forming the bolt-head from. the cam O, Figs. 1 and 14. This cam is mounted upon a transverse shaft, D, and has two rises or salient faces, c c, Fig. 14, the former of which produces the first forward movement of the ram, and the latter a second or subsequent forward movement thereof. rIhe forward end of the ram is furnished with the usual dieblock, E, Figs. 1, 7, and 8, which block is provided with a matrix, e, for giving shape to the head of the bolt-blank.

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The main gripping jaws or dies, through which the rod a of bolt-stock passes, are indicated by the letters FF in Figs. 1, 2, 4, and 6, and are of the usual character pertaining to machines of this class. In addition to these main jaws or dies,there are employed sectional 'or supplemental jaws or dies fj", which are so arranged that when closed they will form an extension ofthe main dies F F, but when opened or withdrawn, as shown at Figs. 4 and 6, will expose the ends or faces of the main dies, to resist the thrust of thelheading-ram in performing a subsequent upsetting operation. If it be supposed nowtliat a rod of bolt- 'stock be introduced into the gripping jaws or dies by the usualfeed-rolls, G G', Fig. 1, and that the end of such rod is projected beyond the front faces of the sectional jaws or diesff, 'as shown at Fig. 10, for a suiiieient distance to furnish the desired amount of stock for the heading-ram to upset in the process of forming a bolt-head upon the end of the rod, the first operation ofthe machine will be to cause the heading-ram to advance, as in ordinary bolt-heading machines, and upset the projecting end ot' the rod upon the faces of the scctional jaws or dies f j" as an anvil. This movement of the ram is accomplished by the rise c of the cam C, Fig. 14, acting through the toggle-lever connections H H', Fig. 1. This operation having` been accomplished, a depressed portion ofthe revolving cam C will allow the spring J, Fig. 1, to draw the ram backward clear of the upset end ofthe rod.

The next opera-tion of the machine is to cause the sectionsffl of the gripping jaws or dies to be opened or withdrawn, in order to expose a further portion of the bolt-rod for enabling a second upsetting operation to be performed. This opening or withdrawal of the die-sections ff is accomplished in this instance by the following-described means: rhe die-sections f j" are respectively attached to two vertical arms, K K', Figs. 3, 4, and 6, which have a common fulcrum-pivot at k, on a standard, t, upon the frame ofthe machine. It is obvious, therefore, that the die-sections j'f may be made to occupy relatively to the main dies F F the positions respectively shown at Figs. 3 and 4. Vhen in the position at Fig. 3, the sectionsff" form an extension ofthe main jaws or dies F F', and when in the position shown at Fig. 4 the faces of the main dies F F are exposed. The rear edges of the die-sections j' f have inclined planes b b', respectively, the remaining portions, t b3, of such faces being straight or substantially parallel with their front edges. In combination with the die-sections f f are vertical sliding rods L L, working in guides of any preferred form. These rods are pivoted at their lower ends to the arms M M of a rock-shaft, N, as plainly shown at Fig. 6. Itis obvious that if a vibratory movement be given tothe rock-shaft N in one direction the said rods L L will move downward and the diesections f f/ will be free to separate. The

separation is accomplished in this instance by means of a wedge-block, m, Fig. 6, which is forced between the arms KKor projections thereon by the movement of the radius-arm M", secured to the rock-shaft N, or the said varms may be made to separate by the inliuence of a spring or other convenient means. When the die-sections fj" are to be closed, movement is given te the rock-shaft N in the opposite direction, Vwhereupon lthe wedge block 'm is withdrawn, and the guided rods L L moving upward cause the inclined planes Z Z', Figs. 3, 4,and 6, on their upper ends to act againstthe inclined planes b b upon the die-sectionsff and force said die-sections to take the closed position shown at Fig. 3, and a-continued upward movement of such rods L L locks the said die-sections elosed,as illustrated at Fig-3.

The necessary movements are given `to the rock-shaft N by the cam P, Figs. 1 and 15, acting upon the arm or lever Q, Figs. 1 and 6, keyed to said shalt. This cam may be grooved to the proper outline, so as to act positively to cause the die-sections ff to both open and close; or if a face-cam be used, as indicated in the drawings to prevent confusion in the gure, a positive movement will be given to the rock-shaft N in one d-irection by said cam,and the movement in the opposite direction can be obtained in a well understood way by means ofa weight, q, Fig. 1, or aspring applied to the arm Q.

Recurring again to the operation of the machine, and understanding that the headingram has made one advancing movement, has upset the end ofthe bolt-rod, and has retreated for a sufficient distance to prevent embarrassing the opening of the die-sections ff', the next operation performed by the machine will be to open or withdraw these die-sections by the means hereinbefore just described. The faces of the main jaws or dies F F are now exposed, as shown at Figs. 4 and 6, and the bolt-rod stands projecting for a distance in advance of said faces equal to the thickness of the die-sectionsff, which have been removed,

and upon the end o' the bolt-rod there is a partially-formed head. The heading-ram is now made to. advance again under the influence of the rise c on the cam C, Fig. 14, and the end of the bolt -vrod is further upset against the faces of the main dies F F as an anvil, as shown in Fig. 12. The bolt-head is thus completed.

It is to be understood that, if round boltstock is used, a well-known squared matrix is to exist in the jaws or dies for the formation of the "square7 under the head ofthe bolt-blank.

While I have shown in the drawings only one removable die-section,f f', it will be apparent to any constructor of this class of machinery that the capacity of the machine may be enlarged by supplying additional die-scctions accompanied with proper mechanism of the same general character as herein described forgiving the proper timely movements to such sections, and mechanism also of the same ICO IIO

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general character as described for giving additional movements to the heading-ram to upset in succession each freshly-exposed length or portion of the bolt-rod. The principle of my invention would not be changed thereby, but its complexity would be increased. Practically it will be found that the machine as described is adequate to forming a head of sufficient size upon bolt-rods.

After the bolt-head has been fully formed, the heading-ram is made to retreat and rise in a perfectly well-understood Wayin this class of machines. The gripping jaws or dies F F now relax their grip upon the bolt-rod by the in fluence of the springr, Fig. 2, upon the die F, such spring being permitted to act for the reason that the cani T, Fig. 5, no longer operates through the lever' U, pin u, toggle u ai, and pin u, Fig. 2, to hold the said jaws or dies shut. The bolt-rod is then fed forward by the feedingrolls G G, the requisite distance for the length of the bolt-blank, and with an ad ditional length sufficient for the formation of the next head on the end thereof, as indicated at Fig. 9. The dies F F are now made to grip the rod by the action of the cam T upon the lever U, which straightens thetoggle u uiFig. 2, and moves the die F toward its fellow F. The heading-ram now descends in a, Way familiar to all acquainted with ordinary boltheading machines, and in descending a cutter, e', Figs. 7 and 8, cuts off the bolt-b1ank on theline Z Z, Fig. 9.

I do not limit myself to the particular de -vices which I have shown for operating the diesections f f', as it is apparent that other well-k noWn mechanical devices for giving the necessary movements to such die-sections can be substituted, the characteristic feature of my invention being the employment, in the combination hereinbefore explained, of gripping jaws or dies vmade in sections, and so arranged thatone or more of such sections can be withdrawn from the main portion of said jaws or dies, and thereby expose fresh sections of rodstock to be incorporated into the bolt-head by the action ofthe heading-ram.

VhatI claim as my invention, and desire to secure by Letters Patent, is-

l. The combination, substantially as hereinbefore set forth, of a heading-ram, and gripping jaws or dies made in aggregated sections, a portion of such sections less than the whole being removable in order commencing with the foremost section to expose successive sections of the bolt-rod stock to the action of following thrusts ofthe heading-rain.

2. The combination, substantially as hereinbefore set forth, ofa heading-ram, mechanism,

substantially as described, for giving an advancing movement to the ram for upsetting the end of bolt rod stock, rodvgripping yjaws or dies constructed in aggregated sections to grip tlierod, mechanism, substantially as described, for withdrawing the foremost of said sections adjacent to the partiallyformed head on the rod to expose a corresponding section of the bolt-rod stock, and mechanism, substantially as described, for giving a subsequent. further advancing movement to the heading-ram for incorporating such exposed stock into 'the bolthead thereon.

W. E. VARD.

Vitnesses:

JOSEPH H. MARsI-IALL, EDsoN SALrsiBUnY JONES.

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