US1683906A - Wire-drawing mechanism - Google Patents

Description

Sept. 11, 1928.

P. 'J. MAHONEY WIRE DRAWING MECHANISM Filed Aug. '27, 1925 s sneaks-sheep Qwuentod P- J ,Mflllune7 Sept. 11, 1928.

' P. J, MAHONEY WIRE DRAWING MECHANISM 3 Sheets-Swat 2 Filed .27. 1925 'll l.

60 3 1 .52 11 7 1/1] [I l/ I :7 l\' W W -20 3; w I Jaw" P- J- Mama-us.-

Sept. 11, 1928. r L 1,683,906

. P. J. MAHONEY WIRE DRAWING MECHANISM Filed Aug. 27, 1925 3 Shasta-Sheet 3 :2 KW ar L Sept. Ill, 1928 Ares rA'rie eK J. meson, on s im-Re n, P'ENr'T-SYLVAN'IA,

WIRE-DRAWING MECHANISM.

Application filed Angus-t 27, 1925. Serial No. 52,886

wire (1 rate of speed and the wire is liable to be lashed about the limbs or body ofthe sttendsnt at the machine, resulting in bodily inji I'v, it not in death. Therefore, the present iiivention has 3 its object to provide eutometic means for ii itielly drawing the wire through the reducinglj die until a suiiicient length ther If has been drawn through the die to permit or the end of the wire being connected tothe take-up reel of the :h swin machine, so that this operation may be performed with. perfect safety to the attend u at the machine and much more renidlv tien has heretofore been possible.

lenol'her object of the invention is to promeens actuated through rotation of the drawing machine, for icellv ch wing an i Mel length of W h the dietfrom the storage the necessi y of the tendant he machine being required to grasp the Viltll a A as h It. through embodying tne invention, a length of v Sll'izlClBl'lo to permit of connection of the end of the wire to the take-up reel, may be quiz-lily and se' l drawn through the die and connected to the reel.

l' nother object of the invention is to so Y LC take-up reel oi: e. wire heretofore been customary, so

Len o.-. i re has been drawn die ,7 theend of the wire to i tune-up reel of the wire him, the attendant, by the mere 1 of a hand lCV1,,.-fit render the live and, the same moment proinnons rapid rotation of the wing of the wire J. ll

0 provide, in connecism, a device WlllCiL ire against in ury to the tools and pull the same through the oeration of the mecha :t the mechanism that as soon as 21' figure 4- is a view similar to Figure 1 illustrating certain parts in section to better lisclose the parts of the mechanism.

gure 5 is a transverse sectional View t en substantially on the line of Fig. ure 4, looking in the direction indicated by the arrows,-

'ure 6 is a similar view on the line 6-6- ofl i'gure 4;.

Figure 7 is a similar View on the line 7'"7 ot' Fig-ure 4.

Figure 8 is a group perspective View illustrating" certain elements of the mechanism. i v

In the drawings, the numeral 1 indicates in general the table or bed of a wire draw= i-ng machine, only so inuch of the machine being shown, however, as is necessary to an understanding of the present invention, audit will be apparent as the description of the invention progresses, that the mechanism embodying the invention may mounted in any desired manner direct/1y upon the table or bed of the machine or upon some other support in juxtaposition thereto. A shaft '2 is rotatably and vertically slidably mounted in a suitable bearing 3 upon the table 1 and is driven through the medium of beveled ggeers l, from a ower shat; indicated by the numeral 5; This shaft 2 has remo'vitbly fixed upon it the reel dicated by the numeral 1 jaws indicated nesaeoe the drum or reel, but as previously oointed cated by he numeral 24, and by reference to out, this is a task which is performed Figures 1 and i of the drawings, it Wlll be only with dii'liculty and it is dangerous to perform. "he mechanism embodying the invention and which mechanism will now be described, is, in a sense, interaosed between the reducin die 7 and the take-up drum or reel 6 of the wire drawing machine. Therefore, so far as the present invention is concerned, the particular manner in which the mechanism is supported is immaterial.

Briefly stated, the invention contemplates the provision of reeip'rocatory gripping mechanism for gripping the wire and pulling the same intermittently through the die 7, means operating through rotation of the reel 6 to effect reciprocation of the gripping mechanism, and cause the same to automatically successively grip and release the wire, and means under the control of the operator of the machine for renderingthe grippin mechanism inactive after a sufficient lei of wire has been drawn through the die to permit of the end of the wire being connected to the reel. The gripping mechanism is indicated in general by the numeral 8 and comprises a head 9 having a dove-tail rib 10 formed upon its under side and fixed slidably in a dove-tail groove 11 provided in the upper side of the bed 1, the die 7 being located at the forward end of the said groove 11, the head being in this manner mounted for reciprocation toward and from the said die.

The head 9 is recessed in its upper side as in- 12, and a cap plate 13 is secured upon the upper side of the head to close the recess and house the gripping members which are supported by the head. The gripping mechanism comprises a pair of by the numeral 1 1, and each comprisin a rocker 15 mounted in a respective side of the recess 12 for limited oscillatory movement about a pivot pin 16 fitted through an opening 17 in the rocker l5 and threaded at its lower end into a threaded socket 18 formed in the bottom wall of the recess, the pivot pins 16 bein located opposite each other, as clearly shown in Figures i and 50f the drawings, and near the rear end of the head 9, the rockers extending substan tially the entire length of said head within the said recess 12. Each lOClZGl 15 is formed in. its forward portion with a recess 19, and a jaw member 20 is mounted in the said recess of each rocker for limited pivotal movement about pivot pin 21 fitted vertically through the forward recessed end of the rocker and through the corresponding end of the jaw member. Each rocker is recessed in its outer side to provide a concave cam surface 22 and each jaw member is formed with a'similar surface 23. The opposing faces of the jaw members 20 of the gripping device are serrated at their forward portions, as indithe faces 21 of the jaw members 20 will be spaced apart a suflicient distance to permit of the passage of the wire to be drawn through the die. it will be evident, however, that the forward end portions of the jaw members may be swung toward each other about the pivot pins 16 against the tension of the springs 25 and this movement is eii'ected through the medium of a pair of crime which are indicated in general by the numeral 26 and one of which is associated with each of the rockers. Each ofthe cam members 26 comprises a body 21 which is of approximately elliptical form and is provided cccentrically with an opening 28 through which is fitted a pivot pin '29, the pivot pin being threaded at its lower end into a socket 0 formed in the bottom wall of the recess 12 in the-head 9, the body 27 being housed between the bottom wall of the recess and the cap plate 13. Each cam body 2? is provided at one side with a pair of laterally extending relatively short arms 31, through theouter ends of which are engaged the ends of a pivot pin 82 connecting, to the respective cam member, the forward end of a link which, at its rear end is connected to rocker The rockers 34: are in the nature of small angle levers which are mounted upon pivot pins 35 in turn mounted up a b loci; which is located immediately in of the head. 9 and is provided upon its under side with a dove-tail boss or rib 38 slid; 1y fitted in a dovetail channel 39 formed in an extension 10 extending rearwardly from the said head 9 and o0nstituting an. extension of the rib 10. In this manner the block 36 is mounted for limited sliding movement with relation to the head 9. Each of the cam bodies 27 is provided at one side with an approximately semi-cylindrical vertically extendingrecess a1, and an antifriction roller 12, preferably of hard steel, is disposed within the r cess to ride against the cam surfaces 22 and 23 heretofore referred to, and it will be evident at this point that when pu l exerted upon the links 83 the cams 26 will be rotated about their axes so as to rock the rockers15 about their pivot pins 16 and effect coaction of the sen rated faces 21 of the aw members 20 to grip the wire 1V.

Each of the angle levers 34 is provided at the opposite side of itspivot to. that at which the respective link 33 is connected, with an arcuate finger indicated by the numeral 43, and the lingers of these two levers are curved rearwardly and laterally outwardly in opposite directions, as best shown in Figure4 of the drawings. A draw head 44 is associated with the block 36 and is supported by a pin 45 which is preferably threaded into the block 36 at the rear side thereof and extends into a cylindrical socket 46 formed in the forward side of the draw head. positely laterally outwardly extending por' tions 47 which are recessed as at 48, and anti-friction rollers 49-are rota-tably mounted upon the extensions oi the said head. The fingers 43 project through the recesses 48 in the laterally extended portions 47 oi the draw head and the peripheriesv of the rollers 49 are designed to ride against the concave sides of the said lingers, as shown in Figures 1 and 4 of the drawings. At this point it will be evident that if a rearward pull is exerted upon the drawhead 44, the lingers 43 'lll be swung inwardly toward each. other, thereby rocking the levers 34 of which they. constitute a part, and exerting a pull upon the links 33 to rotate the cams and cause the jaws of the gripping members 14 to grip the wire to be drawn. It will likewise be evidentthat as the pull upon the draw head is continued, the grippii' 5 device as whole will be shifted rearwardly, thereby stilling the wire for a por tion of its length through the die 7. However, it is e 'pedient to rest ain the gripping device from rearward sliding movement until the jaws of the gripping members 14 have ga ement with the wire W, and with this chain view, ldable restraining means is z rovided as iearly shown Figure 3 ot the dra'wii 's, and comprises a detent-5O in the nature of a small plunger .slidably titted in a cylindrical socket 51 formed in the under of the head 9-oi the device, the phu-i-"er having a stem 52' extending upwardly into the socket from the upper side cad, and spring 53 being arranged the upon the stem 52 and bearits upper end against the upper end is socketand at its lower end against the upper side of the head of the plunger. The under e of the head of the plunger is preferab oundcd indicated by the ni'imeral l is more or less firmly held, by the compis can be moved bodily rearwardly to draw The draw head is provided with op-.

been orought firmlyv into gripping en sive action of the springs 53,- in engagement in a concave recess 55 formed tore the gripping device" clamping engagement with the wire before the device is moved rearwardly.

The invention contemplates the provision of means for imparting reciprocatory movementto the draw head 44 so as to effect actuationlof the gripping device to grip the wire to be drawn through the die and, in the reciprocation of said device, effect such actuation intermittently so that successive lengths of the wire will be drawn until the end of the wire can be brought into position for connection to the take-up reel 6. The means referred to is actuated through rotation of the drum 6 and comprises an oscillator-y arm indicated in' general by the numeral 57, which arm is pivotally mounted at one end as at 58, upon the upper side of the bed 1, substantially oppositethe inner end of the groove or channel 11 in said bed. At'its outer end the arm is provided with an arcuate extension 59 having its end portion formed with a flat substantially rectangular enlargement. indicated by the numeral 60, one side 61 of which is presented toward the inner or rear end offtheohannel 11, as best shown in Figures 3 and 4 of the drawings.

The arcuate extension 59 is located atone side of the longitudinal median line of the arm and at the other side of its longitudinal median line and at its said outer end, the arm is provided with an abutment'62 which has a rounded edge indicated by the numeral 63. An abutment member 64, in the nature of a block 65, is slidably disposed against the edge 61 of the enlargement 60 at the end of the arcuate extension 59, and has a rib 66 which works slidably in a groove 6'7 formed in the said edge 61 of the enlargement 60, the block 65 being, in this manner, movable back and forth along the said edge of the enlargement. A housing 68 of hollow rectangular form, and preferably of heavy sheet metal, is fitted upon and secured to the enlargement 60 of the extension 59 and lenses the block 65 so that the block is held in position against the edge 61 of the said enlargement. Thehousing is provided at its side which is presented toward the draw, head 44, with spaced ears 69 which receive between them one end 70 of a link 71 which is pivotally connected by a pin 72 with the said draw head 44, a pin 73 serving to connect the other end of the link with the said ears 69. It will be observed by-reference to Figures 1 and 4 of the'drawings,

that the arcuate extension 59 of the osciithat end of the abutment block 65 which is locatodnext adjacent the shaft 2, projects inwardly beyond the inner. side of the enlargement at the outer end of the extension 59, and this end of the block is rounded to provide a nose indicated by the numeral 74. A small stub shaft 75 projects downwardl from the under side of the drum 6, and an anti-friction roller 76 is rotatably mounted upon the said shaft and, in the operation of the mechanism and as will presently be described, is designed to successively abut the abutment block and the abutment 62 in the rotation of the drum, it being Obb ved by reference to Figure l of the drawings, that when the abutment block is shifted to the limit of its movement in the direction of the shaft 2,,it will be in the path of movement of the abutment roller 76, the arm 57 at such time assuming the position shown in Figure l. As will be presently made clear, the successive engagement of the roller 76 withv the nose 74 of the abutment block 75 and with the abutment 62, will effect reciprocation of the gripping mechanism, butafter a certain length of wire has been drawn through the die 7 to permit of the end of he wire being connected to the drum (3, it is desired that the drum be permitted to rotate without coacting with the abutments G5 and 62. Therefore, means is provided operable to retract the abutment block 65 from the path of movement of the roller 76, and this means comprises a main ually operable lever indicated by the nu moral 77, which lever is pivotally mounted as at 78, upon the bed 1, at that side of the mechanism opposite the side which the shaft located. An arm 79 is )ivotally connected as at 80, with the enlargement 60 at the outer end of the arcuate extension 59 of the arm 57 and, at an intermediate point, is pivotally connected, as 81, to that end of the abutmentblock 65 which is opposite the end at which the nose T l is located. The other end of the said arm 79 is turned downwardly to provide a stud 82 working ,in a slot 83 formed in the leveri'li'. The lever 77 extends from its pivot 78, which pivot is located substantially opposite the enlargement (50 of the extension 59 of the arm 57, to the forward edge of the bed 1, and is provided with a hand grip 84 at its said end. 7 A latch or detent 85 is swingingly mounted as at 86, upon the forward side of the bed 1 and, in the position of the lever shown in Figure a of the drawings, is enin the said lever near the hand grip 84:, to hold the lever in different positions of adjustment, so that the lever cannot swing from this position to the dotted line position shown in Figure l of the drawings, until the latch 85 has been swung upwardly to inactive position.

I In orderthat the end of the wire W may be connected to the drum 6, the'drum is formed, preferablynear its upper end with a socket 87 of dimensions to accommodate the end of the wire, thesocket extending inwardly eccentric to the axis of the drum, and a clamping screw 88 being threaded into theupper end of the drum in position to bind at its lower end against the inserted end of the wire and thus secure the same within the socket; V

The operation of the mechanism is as follows: V

The end of the wire to be drawn is inserted into the die 7, and a sufficient length of the wire i pulled through the die, manually, by means of appropriate tools, and is disposed between the serrated faces 24- of the jaw members 20 of the gripping device, and the drum 6 is set in motion to revolve at a high rate of speed. As the drum rotates,

the roller 76 will strike the nose 74 of the abutment block 65, thereby swinging the arm 5'7 rearwardly about its pivot and exerting a pull, through the medium of the link 71, upon the draw head 44:. In'the initial movement of the draw head, the fingers 43 of the rocking levers 341- are swung inwardly toward each other through the rolling engagement of the rol ers 49 against their curved edges, thereby exerting a pull upon the links and rotating the cams 26 so as to first cause coaction of the rollers 4-2 with the cam edges 23 of the respective jaw members 20 to cause the inner ends of the jaw faces 24:

to grip the wire, and substantially simulta-' neously, coact with the cam edges 22 of the gripping members 15 to effect closing of the forward ends of these members against the wire to cause the serrated faces 24: of the jaw'membersto uniformly grip the opposite sides of the wire. During this momentary period of operation of the mechanism,rearward movement of the head 9 of the grip,- ping device is prevented through the resistance offered by the engagement of the plunger 50 in its socket 55. The resistance offered by the detent plunger 50,through its en- 7 gagement in the socket 55 in the plate 56, insures of firm gripping of the wire prior to rearward movement of the head 9, and when this resistance is overcome, the head 9 is pulled suddenly rearwardly, drawing a further portion of the length of wire through the die. As the arm'57 is swung rearwardly'about its pivot through the action of the roller 76 against the nose "('4 of the abutment block 65, the downturned end or stud 82 of the arm '79 will ridein the slot 83 and inasmuch as this slot is so arranged as to extend, in the position of the lever shown inFigure at, in diverging relation to the line of movement of the grippingdepivot in a direction to retract the abutment block 65 a sufiicient distance to permit the vice 8, the arm 79 will be swung about its roller 76 to pass the nose 7% thereof when the gripping mechanism has reached the limit of its rearward movement. At this moment, the springs will act to disengage the serrated faces at of the jaws 20 from the wire W, and, due to tie rapid speed of rotation of the drum 6, the roller 7 0 will at the next instant strike against the abu ment 2 and ride past the same, thereby s inging the arm 5'? forwardly to return the roping mechanism to its original position. linas much as, in the forward swnging'movem nt of the arm abutment block'65 is shifted inwardly toward the shaft 2, through the travel of the stud 82 in the slot 83,- the nose 7d of the abutment lock will be immediately engaged the roller '7 6 and the preceding operation will be repeated. Thus, in few moments time a sufiicient length of the wire V2 will, in the operation of the mechanism, have been drawn through the die 7 to bring the end of the wire to position where it can be connected with the drum 6 to be wound thereon. The rotunon of the drum is, of course, arrested while the wire end is being connected, and after the end of the wire has beenconnected with the drum, and before the drum is again set into motion, the latch 85 for the lever 77 is disengaged therefrom and the lever is swung toward the right to assume substantially the dotted line position shown in Figure 1 of the drawings. This effects a full re raction of the abutment block 65 so that its nose 7 i is entirely out of the path of movement of the roller 7 6 and, inasmuch a in the position of the arm 57 shown in Figures 1 and 4c of the drawings, the abut ment 62 is out of the path of movement of the said roller, the drum 6 is free to rotate without acting upon the drawing mechanism. Therefore, thew'ire will be continuously drawn through the die and rapidly wound about the drum.

Heretofore, in wire drawing machines, a in through which to arrest the operation of die winding drum, but many accidents have occurred through failure to properly operate 7 this lever as. for exam le due to the foot of,

/ l l i the operator of the machine slipping from the pedal while he is engaged in connecting the end of the wire to the drum, thus permitting the drum to be instantly set in motion at a high rate of speed. Therefore, the present invention contemplates the provi sion of a means for arresting rotation of the drum 6 and which, means will not present the disadvantage.referred to above as attending the use of an ordinary foot pedal. The said means comprises an a igle lever 89 pivotall mounted for rocking movement as at 90, upon a bracket 92 upon the under side of the bed 1, and having one of its arms, in-

dicated by the numeral 93, formed with a or to its original position, the

posits direction serving to slot 94 receiving a pivot pin 95 at the lower end of a plunger rod 96 slidably mounted 102 pivotally mounted near their lower ends, as at 103, upon b aclrets 1.04: upon the for-' ward side of the bed 1. rod 105 extends between the upper end portions of the arms- 102 and, in the normal position of the parts,

the arms 102 are inclined slightly forwardly and upwardly so that therod 105 is -located slightly in advance of the forward side of the bed 1. point that inasmuch as the shaft- 2 is vertically slidable through the bearings 3, rear-' ward pressure against the rod 1.05 in the di-' rection indicated by the arrow in Figure 2 of the drawings, will-result in the angle lever 89 being rocked so as to projeet the plunger rod 90 upwardly and thus elevate the drum 6 and shaft 2 to which it is secured, thereby dis-on oing the gears r and interrupting the transmission of power to the drum. As the operator will be leaning toward the drum in applying the end of the wire to the drum, his body wilhof course, engage the rod 105 and there is, therefore, no likelihood that the drum will. be thrown into gear until hehas completed the attaching operation and stepped away from the machine.

having thus described the invention, what i claim is: v

1. ire drawing mechanism, embodying head mounted for reciprocation coactinp; rippingmenibers carried by the said head, a member supported upon the head. to move therewith and adapted to receive a movem nt independently thereof, means upon the head operable with relation to; the gripping members to effect mutual coaction thereof togrip the wire, angle levers upon the said member, operativeconnection between the angle levers and the actuatin means upon the head, the said levers having arcuate linp ers, a draw head supported for movement with relation to the last mentioned member,

and rollers upon the draw head for coaction withthe said fingers to actuate the angle means for the gripping members to efl ect mutual coaction thereof to grip the wire, when the draw head is moved in one direction, movement of the draw head in the oprender the actuating means inactive, coaction ofthe said rol. are with the'said fingers of the an le levers serving to connect the draw head with the It will be evident at this I through the die for connection to the drum comprising ahead mounted for reciprotu tion with relation to the drum, coact'lng gripping members carried by the head, a

member supported upon the head to move,

therewith and adapted to receive a movement independently thereof, means operable through reciprocation of the said member with relation to the head to eil'ect mutual coaction of the gripping members to grip the Wire vto be drawn, means resisting reciprocation of the head until the said member has been moved with relation to the head to. actuate the means for effecting coaction of the gripping members, and means actuated through rotation of the drum to impart reciprocatory movement to the said member, 'said means for resisting movement of the head comprising a fixed member with relation to which the head is movable ant. which member is provided. with a socket, and a spring pressed detent carried by the head and engaging in said socket to offer the required resistance, the said socket and detent having coacting rounded surfaces.

3. In wire drawing mechanism, the combination with a winding drum, and a die, of means for drawing an initial length of wire through the die for connection to the drum, said means comprising a head mounted for reciprocation with relation to the drum, c0-

acting gripping members upon. the head, an

oscillatory member, operative connection between the same and the head for reciprocating the head and effecting mutual coaction of the gripping members in the movement of the head in one direction, spaced abutments upon the oscillatory member at opposite sides of the axis of the drum, and an element rotatable with the drum and engageable successively with the abutments to effect oscillation of the said oscillatory member.

4. In wire drawing mechanism, the combination with a winding drum, and a die, of means for drawing an initial length of wire through the die for connection to the drum, said means comprising a head mounted for reciprocation with relation to the drum, coaeting gripping members upon the head, an oscillatory member, operative connection between the same and the head for reciprocating the head and effecting mutual coaction of the gripping members in the movement of the head in one direction, spaced abutments upon the oscillatory member at opposite sides of the axis of the drum, and an element rotatable with the drum and engageable successively with the abutments to effect oscillation of the said oscillatory me1nber, one of sait abutments being shiftable into and out'of active position, and manually operable means for eifecting adjustment of salt abutment. V

5. In wire drawing mechanism, the combination with a winding drum and a die, of means for drawing an initial length of wire through the die for connection to the drum, said means comprising a head mounted for reciprocation with relation to the drum, coacting gripping members upon the head, an oscillatory member, operative connection between the same and the head for reciprOcating the head and eliecting mutual coaction of the gripping members in the movement of the head in one direction, spaced abutments upon the oscillatory member at opposite sides of the axis of the drum, an element rotatable with the drum and engageable successively with the abutments to effect oscillation of the said oscillatory mem her, one of said abutments being shiftably adjustable into and out of the path of movement of the said element upon the drum, and means for automatically effecting shifting of the said abutment upon the oscillation of the oscillatory member in one direction, under the impulse of the drum-carried element. V

6. A wire drawing machine including a vertically disposed shaft having the'drum mounted thereon and movable vertically, drive gearing for the shaft separable by a vertical movement of said shaft whereby it is thrown out of gear, a vertically movable member having a roller at its upper end-"to engage the drum, an angle lever having an arm connected with the said vertically movable member, a rod positioned to be engaged by the operator, and connecting means between the said rod and theother arm of the before mentioned angle lever. 'i

7. A wire winding machine including a winding drum, and. intermittently operated wire gripping means, an operating member for the wire gripping means disposed below the winding drum and actuated by the latter, and means for lifting the drum to clear the said operating member whereby to throw the wire gripping means out of action.

8. A wire drawing machine, comprising a rotary member, intermittently operated wire grippingmeans, an operating member adapted to be oscillated by the said rotary member, an abutment movably mounted upon the operating member and extending into the path of the rotary member to be actuated thereby, and means actuated by the oscillations of the said operating member to alternately project and withdraw the said abutment into and out of the path of the rotary member.

9. A wire drawing machine, comprising a reciprocating head, wire gripping jaws carried thereby, jaw operating means mounted on the head, pivoted members for actuating the jaw operating means movable with the said head, a draw head for operating the pivoted members and reciprocating the said head and means for imparting a reciprocatory movement to the said draw head. V

10. A wire'drawing machine, comprising a reciprocating head, wire gripping jaws carried thereby, jaw operating means mounted on the head, pivoted members for actuating the jaw operating means movable with the said head, a draw head for operatupon the oscillatory member, a manually operable member, and connecting means be tween the abutment and the manually open able and oscillatory members for alternately moving the abutment into and out of the path of the said rotary member.

In testimony whereof I afiix my signature.

PATRICK J. MAHONEY. [1 s.].

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