US2018211A - Wire drawing machine - Google Patents

Description

I/vvmran HENRY Jj H0605 4 Sheets-Sheet 1 mi, B/ W9 H. J.' HOGUE WIRE DRAWING MACHINE Filed Nov. 2l,

/N E d m@ Oct. 22, 1935.

WIRE DRAWING MACHINE Filed Nov. 21, 1934 4 Sheets-Sheet 2 Fig.

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Qct. 22, 1935. H. J. HoGUE WIRE' DRAWING MACHINE Filed Nov. 2i, w34l 4 Sheets-Sheet 3 INVE/v-rolr [15A/@Y HoGuE.

oct. 22, 1935. H J HOGUE 2,018,211

Y WIRE DRAWING MACHINE .Filed NQv. 2l, 1934' 4 Sheets-Sheet 4 HENRY H0605.

Patented JOct. 22, 1935 UNITED STATE 2,018,211 wma nano Mac Application November 21, 1934, Serial No. 754,165

6 i/Claims.

This invention relates to wire-drawing ma.- chines for use in tandem with a Wire fabricating machine, such as a bolt header or Aother machine for cutting the wire into fixed lengths and converting the same into finished, articles or blanks which are to receive additional fabricating operations in order to complete the finished article. The invention relates to certain improvements in the apparatus described and claimed in my prior Patent No. 1,934,466, granted November 7, 1933.

It is one of the objects of the invention to provide an improved form of stock-gripping means for holding the stock stationary while it is being operated upon by the reciprocating drawing die.

It is a. further object of the invention to provide an improved form of driving mechanism for the wire-drawing machine that may be installed separate 4from and unattached to the fabricating machine, and yet driven therefrom in such a manner that the wire-drawing machine will operate in exact synchronism with the. fabricating machine. r.

Other objects of the invention and the features of novelty wili be apparent from the following description taken in connection with the accompanying drawings of which Fig. 1 is a side elevation of an apparatus embodying my invention;

Fig. 2 is a plan view thereof;

Fig. 3 is an enlarged `plan view of the wiredrawing machine;

Fig. 4 is a longitudinal sectionon the vline 2l-3 of Fig. 3; y 35 Fig. 5 is an enlarged tails of my improved stock-gripping and holding mechanism;

Fig. 6 is a longitudinal section thereof on the line 6 6 of Fig. 5; A A 2 Fig. 7 is a transverse section on thel line 'II-'l of Fig. 5, and

, Fig'. 8 is an enlarged side elevation of the driving mechanism for the wire-drawing machine.

Referring to Figs. 1 and 2, A represents, generally, a bolt header of a well known type in which the wire stock is intermittently fed and cut .into lengths and these lengths then formed into blanks for bolts and screws. The bolt header has a main power shaft I0 to which power may, be applied, in vany preferred manner, for operatingthe header. B represents, generally, the wiredrawing machine, and C represents, generally, the drive therefor. The wire-drawing machine B and the driving mechanism C are mountedon a suitable foundation independently of the headplan view showing the dey er A and are in tandem relation with the header, the wire-drawing machine being at one end of the header and the driving mechanism at the other.

The stock is indicated at D and enters the y 5 wire-drawing machine at ll from a coil that is supported on a reel, (not shown), in accordance with the usual practice of feeding stock to a fab ricating machine, such as the header A.

` The wire-drawing machine comprises a frame 10- l2 having slides i3 for the cross-head I4 and the die carrier l5. These parts are shown in detail in Figs. 3 and 4. The die carrier has a wiredrawing die i6 mounted therein and is'freeI to recirocate in the slides i3. y

The cross-head it is actuated by an oscillating lever i1 that is mounted on a shaft i8 and this shaft is mounted in suitable bearings in the frame i2. The upper end of the lever il extends into a slot i9, in the cross-head M, as will be 20 seen from Fig. 4, so that the oscillation of the lever will reciprocate the cross-head in the Ways i3. The upper end of the lever l'i is bifurcated, as shown at 20, so that it will not interfere with the stock D.

The driving mechanism C comprises a frame 2i having bearings '22 for the rotating shaft23. The shaft 23 carries a sprocket 2d at one end and this sprocket is driven from a sprocket 25, on the shaft l@ of the fabricating machine, by means of 3g a chain 26, so that the shaft 23 will at al1 times rotate in exact synchronism Withthe shaft l0 from which the various mechanisms of the fabricating machine are actuated. The frame 2| is mounted on the foundation,` independently of the 35 fabricating machine; and is held lin defmitely spaced relation with the wire-drawing machine B by means of a pair of tie-bolts 26' which ex-Y tend beneath the fabricating machine and are adjustably connected, at their opposite ends, to the frame 2i and the frame l2. A rocker arm 2l is mounted on a stub shaft 2B that is carried by a bracket 29 on the frame 2l. The lower end of the rocker-arm 2l is bifurcated and has connected therewith' a connecting rod 30, which extends beneath the fabricating machinewand is operatively connected with the lower end of the ,1 lever ii, as indicated at 3i.

The shaft 23 carries a. crank disk 32 on which:- there is a crank pin 33 that is adjustable radially 50 of the shaft 23, by means of the screwl 34, to vary the'throw of the crank pin. A link or connecting" rod. 35 connects the crank pin 33 with a. pin 36 t i on the rocker arm 2i, so that the rotation of the nism C will be actuated in synchronism with the K arm 21 and the movements of the rocker arm 21 will be transmitted to the lever I1 by the connecting rod 30. y

From the foregoing general description of the apparatus it will be seen that the driving mechafabricating machine A and that the cross-head I4, being positively actuated from the driving mecha- I nism C, `wi1l also operate in exact synchronism.

with the fabricatingmachine.

The fabricating) machine A will be. provided with suitable stock feeding means, such as a pair of rolls 31 which are actuated by suitable mechanism to intermittently feed lthe stock into the fabricating machine. The driving mechanism Cis so timed that the lever-"I1 will be actuated in the direction of the arrow, in Fig. 4, during the periods that the stock D is at, rest, andthe lever I1 will move in the opposite direction during the )periods that the stock is being fed into the fabri cating machine. The die I operates on the stock to reduce its diameter and provide the .necessary surface on the stock to facilitate the operations in the fabricating machine. Therefore, when the stock D is fed' forward into the fabricating machine, the die carrier I 5 willlbe carried along with the stock and the operation of the lever I1 is so timd that it willmove slightly in advance of the die carrier I5 and thus not interfere with the latter. When the stock comes to rest the cross-head I4 starts on the reverse stroke, indicated by the arrow in Fig. .4, and comes into engagement with Y the die carrier I 5 andV moves the latter along the stock to vperform thewire-drawing operation. Since the wire-drawing operation tendsto draw the stock backward and out of the ,fabricating y machine, it is necessary to .provide suitable means nisln is located.

, as will beseech-pm mg. s, mestock n passes through an opening 4I in the frame 35, across th'ecavity4l andthroughathreadedopening 42v inthe opposite wall.t In this opening 42 there is a rather large hollow set screw 43 through which thestock D passesandthissetscrewmaybesecured in any position to which it is'adjusted by means oi' a smaller yset screw 44. A pair of wedgesliaped reversible jaw members 45 and 45 are arranged in the cavity 4II and provided` with parallel Y lstock gripping faces 41 which have one or" more grooves 45to engage the stock. \The rear faces 43 and 5l) of the jaw members 45 and 45, respecl tively, are in diverging relation to each other and ,to the faces 41, in the direction of the movement of the stock, as will be clearly seen from Fig. 5. f Backing members 5I are the cavity with their faces sz Vrespecting parallel with the faces`49 and 50, but spaced therefrom, and twoseries of cylindrical rollers 53 are `arranged in these spaces. The rollers of each series are mounted in cages consisting of Y an upper plate 54 and a lower plate 55 which are'secred together by suitable means, such as the spacing rivets 55. These cages hold the rollers 53 indefinitely spaced relation and make it convenient for removing or-replacimz either set ofrollers: The

yfrom ythe end of its wire-drawing stroke.

backing members 5I are held in position by blocks 51 which respectively engage the -walls 58 of the cavity 40, (see Fig. '1) rThe blocks 51 may be provided with bolts 59, at their upper ends, for convenience in inserting or removing them when 5 necessary, and, similarly, bolts 50 may be provided in the jaw members 45 and 45vand the backing members 5I In order to hold the jaw members in alignment with each other, pins 5I are provided, these pins loosely engaging sockets in the opposed faces 41 in the jaw members and preventing relative movement between the jaw members longitudinally of the stock, although permitting freedom of movement laterally of the stock.

A coil spring 52 is mounted in the set screw 43 and bears against the ends of the jaw members 45 and 45 so that it tends to press these members backward with respect to the feeding movement of the stock. Ona'ccount of the diverging relation of the lfaces 49 and 59, such backward movement of the jaw members results in their being forced into gripping engagement with the stock by the rollers 53..as the latter roll along the faces of the backing members.

movement to any appreciable extent. lAt the 30 same time, forward movement of the stock would tend to carry the jaw members 45 and 45 along with it and this would effect the release of the gripping pressure and thus permit thestock to freely move forward.

In order to hold the sets of rollers in' proper position between the jaw members and the backing -members, plungers 53 are mounted in set screws 54 and springs 55 are arranged in these set screws to press the plungers outwardly against o the roller cages to move them -in the direction of forward lmovement of the stock, as will be clearly understood from Fig. 5. The set screws 54 may be secured in any position to which they are adjusted by means of the smaller set screws 55. For convenience a hinged cover 51 may be provided on the frame Il, to cover the cavity 4l, this cover being hinged on a pin 5l. In Fig. 5 the major portion o fthecove'r 51 is broken away in order to more clearly illustrate the gripping mecha- It is sometimes n to draw thefstock backward out of the wire-drawing machine and normally the action of the jaw members`45 and 45 would prevent this, but, in order to facilitate 515 the withdrawal of the stock, a lever 55 is fulcrumed'at 10 on a-pair of ears 1I, on the frame 35, and the lowerend of this lever engages witl a pin 12, which is didably mounted and engageable with the jaw members 45 and 45 by swinging so' the upper end of the lever 55 to the right in Fig. 6. When it is desired to start the end of, a coil of stock into the wire-drawing machine. it is necessary to have holding means to prevent the die I5 from pushing the stock back, and, for' this purpose, I have shown a gripping mechanism F that is, in all respects, similargto the gripping mechanism E and mounted on the frame I2,'as shown in Figs. 3 and-4. In this case the stock may be forced through the gripping mechanism'70 manually and the die carrier I5 may be positioned a short distance to the left (in Fig. 3)

The machine is then started either manually or by power to move the die-to the end of its oper- This results in the jaw 25 `members being constantly pressed against the ating stroke and the gripping mechanism F will hold the stock against backward movement and thus permit the die I6 tomove upon the stock. The die carrier I5 is then moved slightly away from the end of its drawing stroke and the operation repeated until a sufficient amount of the stock yhas been fed through the apparatus to enter the end of the stock into the feeding means of the fabricating machine, after which the stock may be automatically fed according to the usual functioning of the apparatus.

While I have illustrated and described what I now consider to be the preferred embodiment of my invention, it will be understood that various changes may be made in the details of the construction and arrangement of the parts without departing from the spirit of the invention as defined in the appended claims.

Having thus described my invention, I claim:

1. In apparatus of the class described, comprising a reciprocating wire-drawing die, the

combination of a gripping mechanism for holding the stock during the operating strokes of the die comprising a frame, a pair of wedgeshaped jaw members having opposed parallel faces for engaging the stock, the sides of said jaw members opposite to said faces being relatively divergent in the direction of movement of the stock, backing means having faces which are respectively parallel with said sides and spaced therefrom, sets of rollers in the spaces between said'jaw members and said backing means with each set mounted in a cage whereby the rollers are held in definitely spaced relation, spring means for normally pressing said jaw members backward with respect to the direction of movement of the stock, and spring means cooperating with said cages to move them' in the direction of movement of the stock.

2. In apparatus of the class described, comprising a reciprocating'\ wire-drawing die, the combination of a gripping mechanism for holding the stock during the operating strokes of the die comprising a frame, a pair of wedgeshaped jaw members having opposed parallel faces for Iengaging the stock, the -sides of said jaw members opposite to said faces being relatively divergent in the direction of movement of the stock, backing means having faces which are respectively parallel with said sides and spaced therefrom, sets of rollers in the spaces between said jaw members and said backing means with each set mounted in a cage whereby the rollers are held in definitely spaced relation, an adjustable hollow member through which thev stock passes, and a coil spring mounted in said hollow member and adapted to presssaid jaw members backward with respect to the direction of movement of the stock. y

3. In apparatus of the class describedfcomprising a reciprocating wire-drawing die, the combination of a gripping mechanism for holding the stock during the operating strokes of the die comprising a frame, a pair of wedgeshaped jaw members having opposed parallel faces for engaging the stock, the sides of said jaw members opposite to said faces being relatively divergent in the direction of movement of the stock, backing means having faces which are respectively parallel with said sides and spaced therefrom, sets of rollers in the spaces between said jaw members and said backing means with each set mounted in a cage whereby the rollers are held in definitely spaced relation, an adjust- I able hollow member through which the stock passes, a coil spring mounted in said hollow member and adapted to press said jaw members backward with respect to the direction of movement of the stock, and lever actuated means on .said frame for moving said jaw members in oppodrawingl machine embodying a reciprocating l5.

wire-drawing die and an oscillating lever for actuating said die, an actuating mechanism for said lever separate from said fabricating machine and arranged on the opposite side of said fabricating machine from said wire-drawing ma- 2 chine and embodying a rotating shaft and a rocking member actuated thereby, driving means for connecting said shaft with said fabricating machineso as to rotate the shaft in definitely timed relation to the operating cycle of the fabricating machine, and a connecting rod between said rocking member and said lever for operatively connecting the same.

5. In apparatus of the class described, the combination of a power-driven fabricating ma- 30 chine for wire stock, a wire-drawing machine arranged in tandem with said fabricating machine for reducing the size .of the stock before it enters said fabricating machine, said wiredrawing machine embodying a reciprocating 35 wire-drawing die and an oscillating lever for actuating said die, an actuating mechanism for said lever separate from said fabricating machine and arranged on the opposite side of said fabricating machine from said wire-drawing 40' with said fabricating machine so as to rotate 45,

the shaft in definitely timed relation to the operating cycle of the fabricating machine, and a connecting rod between said crank pin and said lever for operatively connecting the same.

6. In apparatus of the class described, the 50 combination of a power-driven fabricatingA machine for wire stock, a wire-drawing machine arranged in tandemwith said fabricating'machine for reducing the size of the stock before it enters said fabricating machine, said wire- 55 drawing machine embodying a reciprocating wire-drawing 'die and an oscillating lever for actuating said die, an actuating'mechanism for said lever-arranged on the opposite side of said fabricating machine from said wire-drawing ma, chine and embodying a rotating shaft and a rocking member actuated thereby and having a crank pin thereon the stroke of which is adj-ustable, driving means for connecting said shaft with said fabricating machine so as to rotate o5 the shaft in definitely timed relation to the operating cycle of the fabricating machine, a connecting rod between said crank pin and said lever for operatively connecting the same, and adjustable spacing means extending from said wire- 7 `drawing machine to said actuating mechanism vto hold the same in denitely spaced relation.

HENRY J HOGUE.

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