D“; 3,41946- J. L. §MYERs MACHINE FOR PIERCING WIRE DRAWING‘ DIE UNITS Filed Dec. 6, 1943 I 2,412,101 ' \ \ 2,412,101 Patented Dec. 3, 1946 ‘ UNITED ‘STATES PATENT OFFICE MACHINE FOR PIERCING WIREDRAWING DIE UNIT-S " '" " John L. Smycrs; Fort Wayne,_1nd“.,>.a_‘s_s_igno_r to Ajax Industrial ,Supplies, -In_c',, ‘Fort Wayne, Ind., a corporation of Indiana ' . ‘ Application December 6, 1943, Serial No. 513,201 4 Claims. (o1. 1-25-,-3o_) 1 . This invention relates to improvements in ma chines for piercing wire drawing dies of that type wherein a refractory die body, such as a diamond, is established within a surrounding metallic en casement and subsequently bored to provide a ing, in . which: , > ' ‘ Fig. 1 is a side elevational view of a machine in die opening through the axis thereof tor the which the invention is incorporated, parts being passage of wire'as in the usual wire-drawing op eration. 2 Other objects and advantages of the invention appear in the following description. The above objects are accomplished by the construction shown in the accompanying draw in section; and Fig. 2 is a top plan View of the arbor-support > In the usual practice, a die unit, constituted of a die body and its encasement, is disposed upon 10 ing ?nger and a vibrator associated therewith, forming part of the machine. a spindle, and an arbor provided with a needle The illustrative embodiment of the invention or nib is arranged in axial alinement with the consists of a machine having a frame ,3 provided unit and spindle, there being provided mechanism for rotating the spindle and arbor in opposie di rections and for concurrently imparting axial re ciprocating movement to the arbor. Generally, in such arrangements there is occasioned an im pact between the nib and die body upon comple tion of each down stroke of the arbor whereupon the full weight of the arbor is suddenly imposed 20 upon the nib causing it to buckle or spring out of true alinement with the common axis of the with alined bearings 4—-5 in which is mounted an arbor .6 having rotary and axial movement therein and which is provided withmeans for rotation thereof, preferably consisting of a pulley 1 driven by a belt 8 actuated by any suitable means (not shown). The lower end of the arbor has in connection therewith a chuck 9 provided with .aneedle or nib ,lil thatrotates with the ar bor upon a common axis. In the base I l of the framers mounted a spindle i2 provided on its upper end with a face plate to cause enlargement of the bore as it is made 25 l3, and at its bottom with a pulley l4 actuated by a belt ,_|5 connected with a suitable source of in the die body and is detrimental especially powerlnot shown). The spindle and the arbor when the bore required is of exceedingly small are axially alined and preferably are rotated in diameter and the nib necessarily slender. Such opposite directions. 7 tendencies are aggravated as violence of the im revolving parts. Such unintended lateral play of the nib tends pacts increase which frequently cause inaccurate 30 On the frameare provided brackets [,6 in which issupported a horizontalrshaft I1 thataffords performance or fracture of the nib. pivotal, support for a lever or ?nger I8 the ‘for An object of the present invention is to ‘afford ward end of which is bifurcated and extends , in connection with a die-piercing machine having a-stridethe arbor 6 and ‘upon which the pulley a revolving and axially movable spindle provid ed with a nib, and a ‘die supporting spindle ax ially alined with said arbor, a support for said arbor to yieldingly limit the stroke thereof, and DO U! ‘I bears and resists downward movement thereof. On theframe 3 is mounted a guide IS in which is slidably mounted for vertical movement there in a carriage 2B the upper end of which has means to create axial tremor of the arbor where mounted therein a threaded post 2! provided with fore to lengthen the normal limited stroke of said arbor, thus to soften and increase the fre 40 a lockenuty? by which the post is secured in adjusted positions relative to the carriage. The quency of impacts between the nib and a die body upper end of the post has thereon a cushion 23, disposed on said spindle. preferably made of rubber and which has contact Another object of the invention is to provide a ‘with and yieldingly supports the ?nger 18 in a die piercing machine by which to facilitate mak ing of die openings through die bodies in such 45 selected position according to adjustment of the manner as to more accurately pierce the die body and materially reduce the time ordinarily re quired to penetrate it. And a further object of the invention is to pro vide in a wire die piercing machine means where by the impacts between the penetrating nib and the die body are softened and increased in fre~ quency as compared with the common practice, wherefore .to attain accuracy and speed in per forming the boring operation. post. The lower end of the carriage has a foot 24 thatrestsupon a cam 25 located on a cam shait 26 that is suitablysmounted in bearings 21 on_-the~,frame 3. The cam shaft has a pulley 28 50 actuated by a belt 29 that is connected with a suitable source of power (not shown). Upon rota tion oithe cam the carriage is vertically recipro catedand the ?nger. accordingly is actuated. By this ‘means, vthroughlthe ,medium. of the finger, 55 thearbor 6 is vertically reciprocated. 2,412,161 3- . 4 Upon the ?nger I8 is mounted a vibrator of the shaft 26 so the cam 25 is in its lowermost any suitable construction, preferably consisting position. The spindle 6 is then adjusted vertically to a selected position by turning the post 2| to move the ?nger so the nib closely approaches contact with the die body. Thus, when the vibra tor is energized vertical tremors of the spindle created through the medium of the? ?nger are of an electric magnetic base 30 provided with an electrical coil 3| that is energized by alternating current supplied from any suitable source (not shown) through conductors 32-33. The base 30 has a core 34 that extends upwardly through the coil 3|, ‘and disposed over the upper end of the core, suitably spaced therefrom, is a reed 35 sup ported at one end by a block 36 that has pivotal support as indicated by 31 upon the base 30. The block is provided with an adjusting screw 38 the inner end of which bears against the base, the more or less softened especially in the downward action of the spindle, by yielding of the cushion 23. Piercing of the die body by the nib‘ is progressed as the post 21 is adjusted downwardly by the operator. The downward urge of the arbor is induced by the tremors of high frequency which are accompanied by correspondingly arrangement being such that, by adjustably turn ing of the screw, the space between the reed 35 numerous impacts between the nib and the die body resulting in rapid penetrative effect as com pared with the usual practice in which a longer and much slower stroke of the arbor is employed. In the present invention the actual penetrat and the core 34 is varied. When the coil is ener gized the reed is magnetically attracted, thus im-. parting to the ?nger more or less vertical vibra tory movement which in turn causes vertical tremors of the arbor apart or in addition to the 20 ing’ effect of the nib through the die body is acnormal axial. movement thereof occasioned . by complished by the. lengthened portion of the action of the carriage or adjustment of the post. down stroke of the arbor occasioned by the The tremors'thus imparted cause elongation in tremors thereof while the weight of the arbor is the range of the normal stroke of the arbor per for the most part born by the ?nger while sup mitted by yielding action of the cushion 23 with 25 ported yieldingly on the cushion. In this manner respect to the ?nger. Operation the nib, upon each impact with the die body, is relieved of the weight of the arbor, which is a valuable feature of the invention. In utilizing the invention the die unit‘to be Variations from the particular construction pierced generally consists of a die body 39 pro above disclosed may be resorted to by the exercise vided with a reinforcing encasement 40, there of skill in the art, without departure from the being ‘made in the unit axial cavities 4| in its top scope oi the invention, and the following claims and bottom that extend through the encasement are intended to be inclusive of such variations. and partially into the die body made preliminary What I claim is: to the piercing operation. The unit is centered 35 1. In a machine for piercing wire drawing die on the face-plate and secured thereon in axial units, an arbor mounted for rotation‘ and axial alinement with the spindle and arbor by any suit movement provided with a nib, a spindle mounted able means, such as wax applied in the usual for rotation axially alined with said arbor manner. The arbor is then lowered by adjust adapted to support a die unit to be pierced by ment of the post 2| while the carriage 20 is in said nib, a ?nger mounted for up and down move-' its lowermost position, so the nib l0 closely ap ment connectedly related with said arbor, a re proaches contact with the die body. Rotary mo ciprocating carriage having an adjustable post tion is then imparted to the arbor and spindle, thereon provided with a cushion engaging said and the carriage is reciprocated vertically by the mechanisms therefor provided so that while the 4. ?nger to yieldingly limit the down stroke of said ?nger, a high frequency vibrator in connection unit is revolved in one direction the nib is rotated with the ?nger wherefore to impart vertical in the'opposite direction and simultaneously is tremors to the arbor thus to lengthen its axial axially reciprocated through the medium of the movement, and means for actuating said car carriage and the ?nger. When current is sup plied through the conductors 32-33 the vibrator 50 riage, arbor, spindle and the vibrator. 2. In a wire drawing die body piercing ap is energized causing the ?nger to tremble thereby paratus, a frame, a support‘ on the frame for a creating vertical tremors of the arbor which re ceives support on the ?nger. The cushion 23 on the post yields more or less to the trembling ac tion of the ?nger so that the downward stroke -of the arbor is correspondingly lengthened thus permitting the nib to have actual contact with the die body with penetrating effect. AS in the usual practice the operation is e?ected by use of a ?ne abrasive dust accumulated in the region of the point of impact between the nib and die body. ' As the tremors of the arbor are of high fre die body to be pierced, an arbor mounted in said frame for rotation and axial reciprocating move ment, having a nib to engage said body and pro vided with means to rotate said arbor, a pivoted ?nger having supporting relation with saidarbor . provided with cushioned means to axially re ciprocate said arbor, and a high frequency vibra tor operatively associated with said ?nger by which high frequency tremors are concurrently superimposed upon the axial reciprocating movement of the arbor during engagement of the said body by the nib. ' quency the resultant impacts between the nib and die body cause corresponding rapid penetration of 65 3. A piercing apparatus for wire drawing dies consisting of a die-body support mounted for the nib through the body, its downward progress being controlled by manipulation of the post. rotation, an arbor provided with a nib, mounted In making dies of small bore, such as are re— for axial and angular movement and‘ axially ) quired for drawing very ?ne wire, it is essential alined with said die-body support, a ?nger that the thrust of the nib be gentle as the point 70 mounted for pivotal movement, having a yield 'of its impact with the die body is‘approached ing support and connected relation with said in order to circumvent buckling or blunting of ' arbor adapted to restrain downstroke thereoL'a the: nib. In such instances reciprocation of high frequency vibratory member in connection the carriageimay- be dispensed with by removal with said ?nger to cause axial tremor of said of the belt 29‘from the pulley 28 and turning 75 arbor concurrently with pivotal movement of said 2,412,101 5 ?nger, and activating means for said die-body support, arbor and vibratory member. 4. A piercing apparatus for wire drawing dies consisting of a die-body support mounted for rotation, an arbor provided with a nib mounted for axial and angular movement and axially alined with said die-body support, a finger mounted for pivotal movement having support ing connection with said arbor, an adjustable 6 yielding support for said ?nger adapted to re strain the down-stroke of said ?nger and the arbor supported thereby, a high frequency vibra tor on said ?nger adapted to cause tremor there of concurrently with its pivotal movement dur ing engagement of said nib with a die body placed on said support, and means to activate said die body support, arbor and vibrator. JOHN L. SMYERS.