US395031A - William l - Google Patents

Description

(No Model.) 2 SheetsSheet 1.

E. O. BOERNER.

MACHINE FOR MAKING NUT BLANKS. 4

No. 395,031. Patented Dec. 25, 1888.

INVENTOR- N. PUERS. Fholo-Lilhugnphlr, Washington D Q 2 Sheets-Sheet 2.

(No Model.)

B OBOBRNER. MACHINE FOR MAKING NUT BLANKS.

Patented Dec. 25'

INVENTUFM WITNESSES.

N. PETERS, Phobllkhographer. Wzdlinskm. DJ;

i NITED ST TES PATENT Orricn.

EMIL C. BOERNER, OF PORT CHESTER, NElV YORK, ASSIGNOR T \VILLIAM E. YARD, OF SAME PLACE.

MACHINE FOR MAKING NUT-BLANKS.

SPECIFICATION forming part of Letters Patent No. 395,031, dated December 25, 1888.

Application filed October '7, 1887. Serial No. 251,732. (No model.)

To all whom it may concern:

Be it known that I, EMIL C. BOERNER, of Port Chester, in the county of \Vestchester and State of New York, have invented certain new and useful Improvements in Machines for Making Nut-Blanks; and I do hereby declare that the following specification, taken in connection with the drawings, making a part of the same, is a full, clear, and exact description thereof.

In the accompanying drawings, Figure 1 shows a top view of a machine embodying the improvement. Fig. 2 represents a side view of the same. Fig. 3 shows the feed-rolls in side elevation and the blocks in which they are mounted in section. Fig. erepresents an end view of the feed-rolls. '5 shows, on an enlarged scale, a vertical section through the dies. Fig. 6 represents a face view of a rudimentary nut-blank as it is cut from the bar of stock. Fig. 7 shows a face view of a finished blank. Fig. 8 represents a side view of the cam and lever for operating the wedgebar that works the removable stop against 2 5 which the bar of stock is fed. Fig. 9 shows a vertical section of the machine on line X X, Fig. 1. Fig. 10 represents a top view of a portion of the plunger and the punches thereon.

So much of the invention as is represented at Figs. 5, 6, and 7 relates to an improved means and method for making nut-blanks in hexagonal form by the co-operation of a hexagonal female die with a punch circular or of other geometrical form in cross-section and of greater area than said die, which punches out the blank from the bar and without the aid of a punch polygonal in cross-section and corresponding with the form of the female die, and is not made the subject of this specification, but is reserved for the subject of another application. The same is exhibited in the figures referred to for the reason only that the machine is capable of performing such function The machine represented in the remaining figures of the drawings is an improvement on the nut-machine patented to Villiam E. \Vard,

dated December '7, 1886, Do. 353,901, and, eX-

ceptin the particulars to which the improvements hereinafter described relate, may be understood to be substantially the machine v described in said patent and illustrated by the drawings thereof.

In machines for making nut-blanks, the holes of the nuts to be threaded are punched from the bar of stock in succession preliminary to cutting the bar of stock into rectangular sections for the blanks. Thethreaded holes of the nuts should be exactly central relatively to the periphery of the blank. It is a fact that the operation of punching the holes in the bar of stock has a tendency to slightly stretch the bar longitudinally, depending largely upon the density of the material. There is a consequent liability that after the rod has been cut into sections intermediate of the holes the several holes will not be eX- actly central with respect to the edges of the blanks to which they belong.

To remedy this difficulty is one of the ob- 7o jects of my invention, my purpose being to readjust the position of the bar of stock in the machine preliminary to the punching of each successive hole, so that any'elongation of the rod by the punching of the previous hole shall not exist as a disturbing factor in locating the position of the ensuing hole. So, also, if in feeding the bar forward against a fixed stop to gage the size of the nut-blank, it shall happen, as it frequently does, that the '80 end of the rod after it strikes the stock will rebound or spring backward, my improvement will prevent any ill results from this circumstance. I accomplish this result by gaging the position-of the successive holes by their actual distance from the next or other pre ceding hole which has-been punched, instead of relying upon a stop against which the end of the bar abuts. To effect this, I place on the end of the cut-off punch a teat, (shown at a, Fig. 5,) the end of which is rounded or made conical, so that it can readily find its way into a hole which has already been punched in the rod, and thereby readjust the position of the rod preliminary to the punching of the succeeding hole, in case its position has been disturbed either by the elongation of the rod, as the result of the punching of the hole or from the rebounding of the rod after striking the stop-gage. Ootemporaneously with this action of the teatpunchl cause the feeding-rolls or equivalent feeding devices which have just fed the rod forward against the stop to relax their grip upon the rod sufficiently to allow the teatended adjusting device after it has entered the hole to control the position of the red by moving it longitudinally to the proper position to gage accurately the position which the next hole to be punched in the series shall occupy.

The feed-rolls 1 and 2, Figs. 1, 2, and 23, are mounted on vertical shafts which turn in blocks 3 and 1, respectively. The shaft of the roll 2 is provided with a ratchet, 5, which is worked intermittingly by a proper pawl, 6, and is also furnished with a gear meshing with a fellow gear on the shaft of the roll 1. to turn the latter. This pawl is pivoted in a well-understood way to a swinging frame, 7, and the same is worked by the rod 8, which is itself pivoted to a bell-crank lever, 9, Fig. A vibratory movement is consequently given to the pawl when a to-and-fro movement is given to the connecting-rod 8. This movement of the rod 8 is effected in one direction through the bell-crank lever 9, one arm of which is provided with an anti-friction roller, 10, and this roller takes a bearing against the face of the cam 11 on the main shaft, and is operated by a salient projection therefrom at the proper times in a familiar and well-understood way. The movement in the opposite direction is effected by means of a counteracting spring, 12.

The bar of stock 13, Figs. 1 and f), is fed f0)" ward intermittingly by the feed-rolls against the face of a stop-gage, 13, preparatory to the advancing of the punch 14. for punching out a hole in the bar, which hole, when the nut is completed, will be furnished with the usual thread. New, to accomplish the improvement which I have above premised, I cause the longitudinal position of the bar of stock to be adjusted through the agency of means independent of the feedinga-olls and stop -gage heretofore mentioned and commonly employed.

(I is the sliding plunger or head-block used in. this class of machinery for carrying upon its end or face the coring or hole-making punch 14;. I mount upon the face of this same sliding head another punch, A, which acts in the first instance a cutting-01f device to sever the nut-blank from the bar of stock. This punch is provided with the teat or adjust ing device a, hereinbefore referred to. The axes of the punches 1i and A are parallel with each other, and are separated, as shown inv Figl 10, and so that the teat a. will enter a hole which has already been punched in the bar while the punch 14: is advancing for the purpose of punchinga new hole. In this instance the two punches are separated from each other by a distance which will enable the teat to enter the second hole already punched pre ceding the one about to be punched. The mechanism which works the sliding head 0, upon which the punches are mounted, is of the well-known eccentric variety, such as is shown in Letters Patent No. I, 0,001, l'ie'fore referred to.

So soon as the teat a on the face of the eut ting-oil punch A is ready to enter an already punched hole in the bar of stock, for the purpose of taking control of the bar and adjusting its position longitudinally to effect the results hereinbeforc mentioned, the grip of the feed-rolls 1. and is relaxed, so as to yield possession of the bar of stock to the adjusting device. This relaxing of the feed rolls is accom 'ilished as follows: The block 3, in which the shaft of the roll 1 is mounted, is hinged near its bottom to thcblock 1-, as shown in Fig. 3. The block 3 is kept in proper po sition, so that the roll 1 will be able to grip the bar of stock, in coaction with its fellow feed-roll 2, by means of a bell-crank lever, 15, (shown at 1 and 2,) the short arm of which, Fig. 1, is provided with any adjustingscrew, 11], the end of which bears against the upper end of the block 3. Pressure is maintai ned through the long arm of said bell-crank lever, the end of which, furnished with a frietion-rol ler, bears against the face of a plate, 1 7, fixed on the end of the main shaft 1). A portion of the face of this plate is depressed, as indicated at 18. \Vhenever, in the revolution of the shaft 1), this depression reaches the roller on the long arm of the bell-crank lever the pressure of the adj listing-screw 16 against the block 3 will be relaxed or taken elf, where upon the block will tilt backward upon the hinge-Connection near its foot and the bar of stock will at that time not be under the control of the feed-rolls. It is obvious that the operation of thismechanism described canbe arranged with reference to its time of action, so as to release the bar of stock at the instant that the adjustii'ig-teat a on the cutting-oft punch A is entering a hole Pill'lCllQddll the bar. It is also plain that if the bar of stock is not in proper position it will be cm'rccted in its position longitudinally by the action of the adjusting device.

The punch A isprovided with a euttingotl1' face, I), which, after the teat d has entered the hole in the bar, severs a nuteblank from the bar in advance of the time when the end of the punch 1i will reach the bar, and. the sliding head continuing its nwvement, causes the punch l-t to punch a fresh hole. It is obvious that the cutting-off face I) of the punch A may be located, if preferred, so that it will not act to sever a blank from the bar until after the punch 1-t has done its work. In such case the teat a will be proportionately longer ora furtherdistance in advance of the face I).

In case, for any reason, it is desired to suspend the action of thefeed-rollsl and 2 while the rest of the machine continues in motion, it can be accomplished by the means shown at Figs. 3 and 4. A. sliding bar, 19, is set on the side of the block It can he moved vertically by means of the hand-lever :20. (Shown at Fig. 4.) The upper end of this bar is cut away at 21, above the point where the end of a sliding pin, 22, takes a bearing under the influence of the bellficrank lever 15 and adjusting-screw 10, which latter presses against the end of such pin. \Vhen the hand-lever 20 is depressed to the position shown by dotted lines at Fig. 4, the sliding pin 22 will not touch the thinned end of the sliding bar 1.). Consequently the feed-roll 1 will fall away by gravity in the same manner that it would do in case the pressure of the bell-crank lever 15 were relieved by the means hereinbet'ore explained.

Another feature of my invention consists in making the stop-gage 13, against which the end of the bar of stock in the first instance fed, movable in position, so as to prevent chips which fall from the operation of cutting off a blank from adhering to the face or end of the stop-gage and build themselves thereon. I cause the stop-gage, after the end of thebar of stock has been fed against it, to move backward for any desired distancesay from one to one and a half inehbefore the cuttingotf punch comes into play, and thus furnish a free space for the discharge of the chips. The arrangement of devices for elfecting this result is shown at Figs. 1 and 8. The stopgage is indicated at 13), Fig. 1. It consists of a bar which is capable of sliding in a keeper or bracket, 23. A coiled spring, 24:, tends constantly to slide the stop-gage backward. The power of this spring is counteracted by means of a sliding bar, 25, the forward end of which is formed with an inclined plane, 26. \Vhen such sliding bar is in the position shown in Fig. 1, the stop-gage is projected forward, so as to receive the end of the bar of stock fed forward by the feed-rolls. The movement of this sliding bar is governed by a cam, 27, (indicated in detail at Fig. 8,) a double-acting cam being employed to reciprocate the bar at the right times. After the stock has been fed forward against the stop-gage, the cam 27 pulls backward the wedge-ended sliding bar 25, whereupon the spring 24 causesthe stopgage 13 to be pulled backward.

I do not limit myself to the precise form or style of feeding mechanism hereinbefore described. Any feeding mechanism known in the art may be en'iployed which has the characteristics of intermittingly feeding the bar of stock and of releasing the bar at predetermined timesas, for instance, the well-known tongs-feed, which operates to advance the stock, and then releases it preparatory to taking a fresh hold thereon to effect a subsequent advancement. Neither do I limit myself to the precise construction and arrangement hereinbefore described for causing the feedrolls (should they be employed) to release the bar of stock, as it is obvious to anfskilled mechanic that equivalent arrangements may be used. For instance, instead of pivotingthe block 3 to the block 4, so that the roll 1 can swing to and from the roll 2 in the arc of a circle, the block 3 may be mounted to slide upon guides to and from the block 4, the lever15 and cam-plate 17 being employed to move the block 3 toward the block a, and a spring or weight being used to retract the block 3 when the bar of stock is to be released, as will be readily understood. In place, also, of employing the bell-crank lever 15 and camplate 17 to move the block 3 toward the block t, to cause the rolls 1 and 2 to grip the stock, a longitudinally-sliding bar may be substituted for the lever 15, and a proper cam to act upon such bar be used in place of the cam-plate l7. precise mechanism shown for controlling the movements of the adjustable stop-gage 13, as it is evident various other equivalent means and arrangements may be employed. Thus it is obvious that a spring or weight may be used to cause the gage to advance, instead of to retreat, and that a bar or lever worked by a camv may be employed to cause the gage to retreat instead of to advance. It is also perfectly obvious that the gage may be in the form of a pivoted arm, against one end of which the stock shall be fed, the other end of the arm being pivoted or connected to the sliding bar 25, so as to be swung laterally away from the bar of stock when the bar 25 moves in one direction, and be swung into position to act as a stop when the bar 25 is moved in the opposite direction.

I have shown the adjusting device a as mounted on the end of the cutting-off punch A. This is the most convenient arrangement; but it is obvious that the adjusting device may be mounted on the end of a sliding head and be independent of the cutting-elf punch. This, however, would involve the necessity of giving movement to such sliding head and adjusting device independently of the means which give movement to the cutting-off punch, but no practical advantage would be gained thereby.

\Vhat I claim my in vent-ion, and desire to secure by Letters Patent, is

1. The combination, substantially as hereinbefore set forth, of intermittingly feeding and releasing rollers (or equivalent feeding devices) for feeding through a prescribed distance a bar of nut-blank stock which has been punched with holes at equal distances from each other, and a bar-adjusting device, substantially as described, adapted to enter a hole previously punched in the bar of stock and correct the position of such bar after it has been released by the feeding devices.

2. The combination, substantially as hereinbefore set forth, of intermittingly feeding and releasing rollers (or equivalent feeding devices) for feeding through a prescribed distance a bar of nut-blank stock which has been punched with holes at equal distances from each other, a bar-adjusting device, substantially as described, adapted to enter a hole previously punched-in the bar of stock for taking control of such bar after it has been Nor do I limit myself to the released by the feeding mechanism, and a entstop-gage arranged to be at rest when the bar ting-oil": punch or device for severing blanks is fed against it and thereupon to retreat out IO from the liar. 0f the way, and a cutting-off punch or (leviee 3. The cmnbinaiion, sulrstzmlizrlly as herei for severing blanks from the bar. 5 inbe'fore set forth, of iniermirtingly feeding EMIL C. BOERNER.

and releasing rellers (or equivalent feeding \Vitncsses: devices) for feeding through an preserihed (lis- WILIJJJUI L. \VARD, tunee :1 lmr ul' nnt-l'rhink sleek, n nmvahle H. N.LI J1 .RE;[R1 1;

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