US837435A - Nut-making machine. - Google Patents

Description

No. 837,435. PATENTED DEC. 4, 1906.

. P. G. TRUEBB.

NUT MAKING MACHINE.

APPLICATION FILED MAR. 13. 1905.

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No. 837,435. PATENTED DEC. 4, 1906.

P. G. TRUEBB. NUT MAKING MACHINE.

APPLICATION FILED MAR. 13. 1905.

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Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed March 12,1905- Serial'No. 249,767.

To all whom it may concern:

Be it known that I, PAUL G. TRUEBE, a subject of the German Em eror, now residing at Allegheny, in the tate of Pennsylvania, have invented certain new and useful Improvements in Nut-Making Machines, of which the following is a'specification.

My invention relates to mechanism for automatically forming the blanks of metallic nuts ready for threading, and its prim objects are, to form the nut blank without s earing, to press the nut into finished shape and punch it at one operation without movin the nut, to provide more efficient feeding an ejecting devices for such machines,- to ro vide superior cooling means for the punc es, and to generally simplify and make a more accurate operation of nut forming machines. These objects and other advantages which will hereinafter ap ear, I attain by means of the construction illustrated in a preferred form in the accompanying drawings,'where- Figure 1 is aside elevation of the whole machine with parts of the dies shown in section;

Figure 2 is a partial horizontal section of the machine taken on line (2) in Figure 1 and line (2, 2) in Figure 3;

Figure 3 is a partial vertical section through the machine taken along the line (3) in Figure 2 i Figure 4 is a detail partly in section on line (4) in Figure 1, showing the means for operatin%the plunger head i e 5 is a partial horizontal section through the punches, taken along the line (5) in Figure 6;

Figure 6 is a partial vertical section through the plungers, showing the unches in action and the means for coo ing the punches;

Figure 7 is a section taken at right angles to the sectionof Figure 6, and

Figure 8 is a partial sectional view showing the operation of the formin dies in cutting oil and shaping the nut blan s.

In order to avoid waste of the metal in makin the blanks from bars, I shape the blank m the first instance by forming dies which cut and press-the shape and do all the necessary shearing in compressing the hot metal into the form of the blank at once,

In order which is connected, to a sliding cross-head 29 leaving no waste. (See Figure 8.)

blank is ressed in the finishing die to give it its finals ape, and have arranged the operating parts so that the nut does not materially move during the o eration from its original position as cut off from the stock bar. machine is shown in its simplest and most compact form in the drawin but it will be understood that its general features are a plicable to different forms of nuts and li e articles and the machine may be elaborated to moreefiiciently affect the various operations, the example shown being merely illustrative of the general features and the principle of operation.

In the accompanying drawings it will be seen from Figure 1* that I have provided upon The a base 10, two uprights 1 1, which carry aheavy horizontal shaft 12 driven by a large gear wheel 13, which in turn may be driven y a gear 14 from a pulley shaft or otherwise supplied with power as may be desired. Referring to Figures 2 and 3 especially; the bar of hot stock metal A is preferably fed into the machine direct from a heating furnace, and drawn between two rollers 16 which are mounted upon shafts 17 attached to a vertical plate or other sup ort 15 on the back side of the machine. T e shaft 17 carries a ratchet wheel. 18 and above its shaft, upon a supplemental shaft 19 I have mounted a feeding dog upon a pivoted arm 20 which has an upward extension 21 and this is operated by the link 22 which has a head engaging an eccentric upon the shaft 12, as will be seen from Figure 3. This mechanism automatically advances the bar of stock'rnetal A into the machine at intervals, and a predeterminal distance.

The bar A being fed in a horizontal direction through the machine, sliding on to of the finishing dies to be hereinafter descri ed, is brought into proper position by means of an adjustable stop bar 23 shown in Figures 2, 3, and 8, and the present machine is arranged to make four nuts at a time. The bar being in place is cut by the horizontally reciprocating forming or shaping dies 24 and 24*, which are mounted upon horizontally sliding brackets 25 resting upon the plates 26 on the base 10 of the machine. They are reciprocated to and fro by means of the toggle links 27, 27, which are spread horizontally by the downward motion of a link 28 to simplify the machine, I punch the central guided in fixed guides 30 and moved by hole in the blank at the same time that the means of a link 31, which has a yoke engaging an eccentric 32 upon the horizontal driving shaft 12. It will be clear from Figure 8 how the coming together of these two serrated dies 24, 24, will form aseries of nut blanks a, a, pressing and cutting them off from the bar and at the same time giving them'a hexagonal form.-

Mounted upon the front of the sliding brackets 25', on plate 26 and beneath the dies 24, 24 is a two-part finishing die33, 33*, with properly formed steel faces. 35 as may be desired, and they are mounted to reciprocate with the sliding brackets 25, but also having a motion independent from them, being first closed together by means of compression springs .34 uponpivote'd boltson the bracket as shown in Figure 1. It is to be noted that in the horizontal reciprocating motion of the brackets 25, the finishing dies 33, 33, will be brought together before the forming dies 24, 24" meet, and in the re-' verse motion the forming dies will open first and afterward the finishing dies will be drawn open. I

' he blanks for the nuts having been pressed as shown in the form of Figure 8, it will be seen from Figure 1 especially, that I have provided a pressing plunger 36 which is carried in a head 37 adjustably attached toa reciprocating cross-head 38 by means of bolts and adjustable therein by the wedges 39 to the proper height. The cross-head 38 reciprocates in fixed guides 40 and is moved as shown in Figure 4, by means of a link 41 which has a yoke engaging aneccentric 42 fixed upon the main driving shaft 12 of the machine. The plungers 36 descending at the proper time'will' press the nut blanks a,

a, a, a, through the forming dies and into the finishing dies 33, 33 Immediately thereupona punch 43 descends to form the hole in the nut. This punch is carried in a stock 44 which is firmly secured in a cross-head 45 guided inside of the head 38 and is forced down 'at the proper time by means of the cam 46 which is fixed upon the shaft 12. The head 45 is normally pressed upward in head 37-38 by means of coil springs 47 or by any other-means as may be desired. The

punch 43 descends and cooperates with a properly formed hole in the bottom of the finishin dies 33, 33 to unch out the thread hole. hereupon the rackets 25 first recede carrying with them the finishing dies 33,

33 and immediately upon these being'opened the unch 43 is withdrawn from the nut, whic is thus left entirely loose from all surrounding parts and drops down from contact with the plunger 36 through the dies and to the bottom of the machine in a finished condition.

From Figures 5,6, and 7 especially, it will be observed. that I have provided for the cooling of the unches 43 by means of a water pipe 48 w 'ch may enter through head 37 to plunger 36, to a continuous passage 49 being inserted in the machine in hot condition is set'forward a suificientdistance to bring its end against the stop 23 by means of the roller 16 and'the ratchet 18 operated as heretofore described; whereupon the hori-- zontally reciprocating forming dies 24, 24*, come together and at the same time cut and forge and compact the metalthoroughly, forming a number'of blanks for the nuts. While these dies are still together, the plunger 36 descends and shoves the blank into the finishing dies 33, 33*, which it will be observed are spring pressed and are brought toether a litt e in advance of the closing of the ormin dies and also remain together a little after t e' separation of the forming dies.

-While the nut blank is in the finishing dies and is ke t pressed down firmly by the pluner '36, t e punch '43 descends and forms a ole therein, whereupon the forming dies 24, 24- are first withdrawn and immediately thereupon the finishing dies 33, 33, leaving the nut on the punch 43 in contact with the plunger 36; the punch is then withdrawn, when the nut in finished condition drops into the bottom of the machine, and the same operations are repeated, theplungers and dies being kept cool in the meanwhile by the flow of water through thepi e 48 and its connected assages as hereto fore described. The nut lanks are thus cut off from the stock bar and they are not moved exce t to shove them from the forming dies, an the punching and finalshaping of the nut take p ace at the same time, without relative movements of the parts. There is no shearing action roper, and it will be observed that by the form of the dies 24 and 24 the metal is forged and thoroughly com acted and that the blank is held upon all si es by the finishing die at the time. the punching is done, so that the punching will not distort the shape of the nut or cause the hole to be punched in an inaccurate position. The punch is guided lowing: I

1. n a nut making machine, the combination with a pair of cutting and forming dies,

of a sectional die beneath and in re ister therewith, a plunger operating to pus 1 tion with a pair of reciprocating members carryung cooperatlnlformmg dies, and means to move them toge er, of a sectional finishing die carried on each forming die and in register therewith there being means for holding the finishin dies resiliently in contact with each other, the same moving with and in advance of the forming dies, and a plunger operatin to remove the nut from the forming dies an press it into said finishin die at one motion, substantiallyas describe 3. In a nut making machine the combination witha set of formin dies and a set of finishing dies immediate y thereunder and means for closing the dies, of a plunger and a punch located in the plunger, means to operate the plunger and press the blank into the finishing die, means to de ress the punch, and means to withdraw all t e dies before the punch is withdrawn from the nut, substantially as described.

4. In a nut making machine the combination with suitable dies, of the presser plunger 36 and the punch 43 located therein and means for depressin and raising the plunger both in advance 0 the movement of the punch therein,substantiall as described.

5. In a nut forming mac ine the combination with operating to gle links and mechanism for reciprocating ti rocating and forming dies attached to said links, a pair of finishln dies resiliently supported on the forming ms, in advance but 1n normal alinement therewith, and a suitable plunger and punch for removing the nut em of a pair of recipblank from the formin die to the finishing die" and punching, it in p ace therein, substantially as described.

6. In a nut making machine a punch and a cooling device for the punches comprising a guiding casing having a spirally arranged passage around the punch and means for reci rocatin the punch through said casing, wliereby a 1 parts of the punc are'brought in contact with the water, substantially as described.

7. In a nut making machine the combina tion with the forming dies, of a plunger for removin the nut from said die, and a punch therein or perforating the nut, and 'a water supply and a assage in said plunger spirally surrounding the unch ,and having an outlet discharge to (:00 the dies, substantially as described.

8. In a nut makin machine the combination with suitable ies, and a plunger for moving and holding the nut, of a perforating unch operating in the lunger, and means fbn adjust-in the vertica travel of the plunger inde en ent of the punch, substantially as descri ed.

9. In a nut making machine the combination with suitable formin and finishing dies of a pressing plunger an a punch contains within said p unger, andmeans to reci rocate it therein so as to perforate the nut w ile the plunger holds it down in the finishing die, and means for, removing of the dies before the withdrawal of the punch from the nut, substantially as described.

Intestimony whereof I have hereunder signed my name in the presence of the two subscribed Witnesses. I

PAUL e. TRUEBE.

Witnesses F. E. GAITHER, ARoHwoRTH MARTIN.

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