US2332609A - Apparatus for manufacturing wire drawing dies - Google Patents

Description

0: 26, 1943. M. SIMONS 2,332,609

' I APPARATUS FOR MANUFACTURING WIRE DRAWING DIES Filed March 17, 1942 4 Sheets-Sheet 1 INVENTOR. /%me/.s Swan/s fiat 6. 7

ATTORNEY.

Oct. 26, 1943. M. SIMONS 2,332,609

APPARATUS FOR MANUFACTURING WIRE DRAWING DIES- Filed March 17, 1942 4 Sheets-Sheet 2 l l AEE EF EHFI INVENTOR.

M. SIMONS APPARATUS FOR MANUFACTURING WIRE DRAWING DIES Oct. 26, 1943.

Filed March 17, 1942 A4 Sheets-Sheet 5 moE A TTORNE Y.

F'iGB.

M. SIMONS APPARATUS FOR MANUFACTURING WIRE DRAWING DIES Filed March 17 1942 4 Sheets-Sheet 4 INVENTOR. Ila/M45 674/0? WC,UUU

ATTORNEY.

drilling a much greater number' 'oi diesit H would otherwise be hecessaryin' 'rder .1; :gg thqi,

'- Patented Oct. 26, 1943 APPARATUS-FOR MANUFACTURING WIRE I DRAWING DIES Morris Simons, Ridgefleld, Conn. Application March 17, 1942, Serial No. 434,990

Claims. (Cl. 125 30) This invention relates generally to improvements in the manufactureof dies for drawing wire and has for its broad purpose the production of wire drawing dies which are more uniform and less expensive than prior dies; and which will on an average last much longer in use than anything heretofore known in the, art.

While the invention is not limited -,to makin dies of any particular size it has its greatest utility in making dies from .002 down to .0004". The dies in thesizes mentioned have heretofore been produced only by highly skilled and experienced men who ground the die drilling needles by hand. Grinding by hand does not mean removing the drilling needle from the machine and grinding it-vand then replacing it, as in actual practice the needle is left in fixed position in the machine and the grinding was done by holding the grinder by hand and applying itto the needle.

- .The shape of the drilling end of the needle .de-

pended entirely upon the skill of the operator in applying the grinder. While a skilled man could drill a hole small enough for fine wire he could not uniformly make dies having the proper shapes. This resulted-in greatjvariation in the productivity of dies, as one of the dies would draw 5000 meters of wire and the next 25,000 meters. However; the user of the dieshad to accept them as they were the. best obtainable.

Study of the product of manufacturers ,ofilne dies by die makers disclosed that only about seven drilling operations to replace to a minimum. 7 I g In addition to the matters above stated, an important object of the invention is toprovide -a means whereby the operator-of a-die drilling machine can drill the die which will'have the correct internal contour at the completion of the drilling operation.

Another object is to reduce drill replacements to a minimum as above stated, an incidental result being that the reduction in drill replacements contributes tothe accuracy of the drillingoperation as no matter how much care is used; in replacing wom drills it is very seldom that the new drillwill have precisely the same relation to'the work as the old one.

A further object is to provide a die drilling mechanism and a grinding mechanism, bothof which run with almost a total absenceof vibration, thereby greatly facilitating both the drilling and the grinding operations 0 .0

Another object is to provide a grinding or sharpening mechanism for the drills which can dies out of twenty produced by the prior practice" could be put into work as drawing. dies having. sizes from .002" down to .0004". The rest of the i theinventionconsis'ts in-apnovel construction and a relation of :parts.;- the :b ieferred. embodiment of which' is, nereinarter described with, reference *to thedrayvings ,a companyingand forming a part of" s'pecificatiqn;

twenty ran over-size and were mane-amazes larger than they were originally intended tohave. This made the cost ofthe finerdies much greater than was desirable and v in addition; finv'olved han number of fine dies required. These defects and disadvantages f'prio tice are overcome by'the-p're's'en as a result the makingfoi; 100{di naught sizes, 5 such as,"for exampl .0006", the yield "isf-rom '90 t0 "1 00 pe that fewer drills are needed and stoppages of diesj. "Ifhe benefitsfin the way of; lowered-"cofst'a nd 84 A ,7 curacy. ofqthe dies. as well as theggreateramount be set up according to a predetermined shape of the drilling point or end so as to yield the desired outside flare, entrance, drawing angle and wire diameter, and after these characteristics have been determined and set up on the appa ratus it will accuratelyproduceall of them on the drilling element. at each sharpening operation.

'.;w1m"ft'he foregoing and; incidental objects in a view which ,wm becomemoreiapparent.later on,

drills ordrilling needles a object to ,be'

the novel features being hadro l gg aihi ami nd d hereto "o substantially the t, H jQ h I E gaging the needles 1 with ,the rilldfand showsja grinding wheel 0 in grindingrelationwitli tlie drill. I

: ,Fi'g. 3; isa-se ion onthelline 3'3 of'Fig. 1.- Fig. 4 .sh'ows.

some or thefdetails of'jthe construction shown 'in Lthe-rightghand'sidejofiFig. 3.1 ,3 g

I Fig.1; 5 isj'a topplanyiew on a scale larger than employed in Fig; 1 ofithe drilling apparatus and I the drive for the'drili.

v Fig. 6;isfa section on thelin'e 6-4 of Fig. 5. 1 Fig. 7 is a section athe line 1-1 of Fig. .5.

drills are reduced ctior'i', and on; a larger scale,-

Fig. 8 is a section on the line 8-8 of Fig. 1.

Fig, 9 is a section on the line 9-9 of Fig. 1.

Fig. 10 is a section along the line of line Iii-l ll of Fig. 3 with related parts at the right shown in top plan view.

In the illustrative embodiment shown in the drawings the various features of the invention are in the form they would take when applied to a French horizontal machine for drilling diamonds for subsequent use inwlre drawing dies. The diamond is represented at 20, Fig. 2 of the drawings.

grooves of rollers 22 having trunnions 23, Fig. 5,

These screws are tapered at their ends to afford a satisfactory bearing for the trunnions of the rollers 22. spring 25, Fig. 2, and a member 28, Fig. 1.

Spring25 is secured at its lower end in a stationary fixture and has its forward endforked to span the member 2|. The fork on the spring engages a block 26 held on the member 2| by a setscrew, said blockhaving a downwardly 'pro-' jecting pin 21. This pin engages the end of a member 28 which is preferably of spring material and is secured at 3|, Fig. 1, toamember 32 Whichis pivoted at 33. The mem'ber32 is provided at one end with an adjusting screw 34 and at the other end with a member 35 carrying the pin 21 to-withdraw the diamond fromengagement with the drill. The adjusting screw' 34 is to permit changing the relation between the members 28 and 32h) regulatethe movement of wear on the drill.

The drill 38. is secured as by solder 39' in a tubular end provided on a shaft 4|, Figsj2'and '7, this shaft forming a part or extension. from a member 42 having tapered portionst3, the assembly being supported in removable cone bearings 44' and 45 mounted in'recesses in the sides of a frame member 46. A plate '41 secured the member 2|; for example, to accommodate for to the frame 46 holds a piece 5|! offelt or the likein sealing relation to the bearing 44; The bear-' ing 45 cooperates with the head of an adjusting screw .8 which can be turned to regulate the cone bearing support for the shaft 4|. Rigid" with the member 42 and, of course, with the drill 38, is the rotor 5| of a turbine.- This rotor is surrounded by a housing 52 which'is'provided with an air inlet 53 and outlet 54, Figs: 6 and 7. The inlet is in the form of a flat-nozzle through which a. current of air is'forced against the teeth or blades oftheroton This construction provides a means for rotating the drill 38 without vibration,-this effect being contributed to not only by the fact that the drive is in the nature of a turbine but also because of the form'of mounting of the assembly including'the rotor.

The speed of the drive and consequent rate of rotation of the drill 38 maybe regulated by a valve (not shown) in the air supply line. Air pressure is conducted from the source of supply It is mounted in any suitable or usual Way in the head of a member 2| which is mounted for endwise or reciprocatory movement in the 1 rotatably supported on the ends of screws 24.

The member 2| is reciprocated by a- CJI to the turbine through a flexible tube 55 which is joined to the nozzle and the source of air supplied by one or more unions 56.

The mechanism for supporting the reciprocating diamond carrier 2| and for effecting the reciprocations are well known in the art as are also various adjustments, which are shown but need not be described, for obtaining correct axial .alinement between the member 21' and the drill 38.: -.j I, J. i"-- The grinding part of the mechanism comprises a member 6|, Fig. 3, which is provided with gib v 62 engaging a corresponding gib surface on the base 63'forthe' mechanism, the member Bl also having 2. lug or shoulder 64 in which is mounted --a-set screw-85.

The set screw may be loosened and the member 6| adjusted laterally of the machine, i. e'. lengthwise of the drill 38, in setting :upthe mechanism after which the set screw 65 may be tightened to maintain thefldjustment.

" i di s mec an -f. eimmb ris] pr vi'ded-with a groove lengthwisei of the member engagement with'the upper "fa e 'me'mb'er provided" With *byfo'r' endwise movement iria direction laterally of the axis of drill 38. and if 'ocf'c'asion requires it,- the plate 1 6-1 and all "of I 'thfej parts carried thereby may be lifted off as aunimrter' an air tube; mentioned connected;

The grinding wheel 1 is t eate -1mg ad "of a shaft-12;Fig: 13', provided with' la tapered portion 13 working'in a'suitablebearingl" The other end of the'shaft' is providedwith uts ,uror ad- 'jus'ting the'longltudinalj'position or theshaft 12 "andjlo'cking' it in" adjusted position. hey hearing's for the shaft |2 are carrieddn'the side arjr'ns 'ofa fyokg 15 forminga parto a" member, 16, Figs; 1 and *3. meme best s own in Figs:- 1 and 8, 'is pivoted upon boss .11 forming '80. The boss I1 is headed to a" part of "a' member18 which fjournalled i o the nozzle 81' and rotor'86rinia 1 We valve (not shown) in the emp upstanding portion 19 of anadiustment-me spondingly shaped part ofthere sis: inthe] eke portion of the member lliand theifrictionallrela- "tion between the member 16' an'dthe boss, 1 c

trolledby a'pair of nuts'al on aflthreadedjextensionofthemembern."

' Mounted between the side a'rfni jis' r the yoke is a turbine housing 85'containin'g a turbine rotor86. '"Air is deliveredwithl the 'ifluslngffito the teeth or blades of the'j'rot 1' through ja jflat nozzle 8T,- the air escaping thilodgh11angutliat88.

The nozzle'fl isconnecte'd toafsoujrcje divsup'ply by a flexible tube -9| which will ranjs nit ainto grinding mechanisn'i'. The 'afrnonn f an:- deliv- 'ered to :the' rotor and the assage t'l speedvof the shaft-12 and'grindlngwheelf 'll A The purpose or pivoting the me mber Braspreviously described, is to permitjchangingftheangle of the-shaft 12am grinding it to the drilling -need1e 'in se'tt'i This permits determiningth U 1 v the cutmadeby'thegrihding wh Ion th'e'worlting endpf the drillingjeedle 'lan d fafi ordsl-ja means of compensating for changes, in, the 1 sizes of the grinding 'wheels. T j making such adjustments is best-,shown in Figs.

3 and 4. i The pivoted member Hiis provided at.

its end witha micrometer adjusting device. This device comprises acylindrical inembrfll secured by screws 93 on the. underside of-theextension or arm of the member 1 6. The lowertperiphery of the member 92 is threaded to cooperate with the threads on the interior ofa tubular shell 94. Secured in the lower end of the-tubular shell as by means of threadslis a member 95 carrying a roundedpin 9 6 restinguponaflatgsura face or plate '91 forming a part of theupper face of the plate'member 61. The tubular. shel1 94 is provided with markings or 'indicia on the surface 98* which cooperate with a stationary markerf99 to pr v a a Of makingadjustments,preferably by ten thousandths of an inch to raise and lower that end of the memberJS' with consequent raising and lowering of the shaft Hand-grinding wheel H. The tension spring ,10! betweenthe member 16 and the plate-member, serves to. yieldingly hold the member J- E inadjusted position. j

' In .grinding operations .theunit comprisingthe sliding plate member .61 and the parts supported thereon are given ,a reciprocatingmovement at right angles tothe length of the drilling needle thereby engagingthe grinding .wheel .with the needle. In order to prevent the corner fofthe grinding wheel from striking the needle and'c'ausing possible damageto theneedle, the arm a may be lifted against the tension of thespring '30 to .sharpenrthe end of the drilling needle. is

advisable to stop the reciprocations of thememi .ber 2|.

lUl so that ,the grinding wheel will clearlthe needle after which release of the memberdwill permit the spring lfll to engagethejgrindin'g, wheel with theneedla, 5

The grinding wheel shaft 12 and-the turbinel 86 for drivingjitmayalso be adjusteddaterally;

thatis, crosswise of the machine, toen'gagre the grinding wheel, with the .end of the. drilling needle. Thismaybe done in settingup .the. ma-.

chine ready ;for a grinding op'erati on'or it may 40' be done as a part ofthe grinding operation; 'Ihe mechanism for effecting this lateral; moyement is shownto the best advantagein Figs. ,8 and 10. It comprises a threaded rod 102. mounted inlugs I03 extendingupward-from lthe platefi'l. ,The

threads I02 work'in threads in amenrberJM, Figs. 8. and -10, which issecured bygscrews 105 tc the undersideof a-rhorizontal extension .165 of the member 19 to which the memberlils pivoted as before described. One end of the threaded member I02 is provided with a pair of locknuts I01 forlimiting theendwiseam'ovement of "the threaded member 12 but these nuts may be omitted or left loose if desired. zThe-threaded member I02 projectsbeyondthe lug.l03,andhas pinned to it a thumb wheel I H which is integral with an indicating, dial H2 suitably marked and cooperating .with. a stationary markingzpointto indicate the extent of adjustment. The indicia on the dial H2 may be according to. any desired scale, preferably in tens of thousandths of an inch. By turning the thumb wheel. Ill the grinding wheel shaft and grinding wheel, as .well as the turbine-for driving them, .can be moved to and fro so as to carry the grinding wheel back and forth in a direction para1le1 to the length of the drilling needle. r

' This lateraLmovement is permitted andcontrolled by gibs I I3, on the horizontal portion 106 of the member 19 cooperating with'correspondingly shaped gibs lM and 5 on the member Thegib H5 is preferably on a bar which is held in place by screwsvllfi so asto permit ready removal .of the gib H5 in disassembling th apparatus. The frictional relation between 75 (drilling needle 38. 1

. ing wheel-H with the needle; This reciprocating movement is limited inboth directions by-a'pin or screw H8, Figs. 1- and 3, projecting-from the edge of the'plate 61 and cooperating with 'adjustablestops 9 'mountedin' lugs extending fromthe edge of the plate 6|. Before this movement is startedthe air is turned on for the turbine 86 and preferably the air alsd is turned on for. the turbine 51 for rotating the needle. After theproper adjustmentshave been made of the thumb wheel I and micrometer sleeve 94 a lhand'reciprocationlof the platefi'l and the grinding mechanism supported therebyjwill engage the grinding wheelw'ith the drill r'needle and effect the desiredfgrinding operation. The grinding wheel shaft will, because'of the turbine drive for it, run without vibration and this, coupled .withthe met that the needle also has aitur ine I :drive which resultsin absence o f vibra tion, will permit of doing the grinding with extreme ac- .curacy.

When the grinding mechanism is to belused This may be done inv several ways, the most convenient way -being to disengage the forked end of the spring 25,v Fig... 2, from.;the member 2l and block 26 and leave-the member I2] restingupon the rollers'22. ,This. prevents theworkcarrying end ofv the -member 2|: from be'ingmoved into engagement with the'grinding wheel H while the wheelis. in contact withthe In explaining the constructionand operation of the respective embodiments,'- the pane-am their operations have been referred to in considerable detail. However, it will be obvious to those skilled in'the art that many changes may be made and it is not the desire to belimited by anything hereinabovecontained; except 'to the extent indicated by the claims which follow. What is claimed is:

1. In a machine of the character described having a diamond drilling needle; and means for supporting the needle for rotation on a' flxed axis, a grinding wheel shaft on which grinding wheels of different diameters may be secured, a

'machine-frame member having a substantially flat top, a member adjustable on said top in directions parallel to the axis of the needle and means for securing said adjustable member i'z the frame member in various adjusted positions.

a sliding member slidable on the adjustabli.

member toward and away from the needle, :1 pivoted member, means on the sliding member pivotally supporting said pivoted member, the pivot being parallel to the axis of the needle, meansfor adjusting said member on its pivot according to the diameter of the grinding wheel onTthe grinding wheel shaft, supporting devices for the grinding wheel shaft; said supporting'devices being mounted on the pivoted member, and means for adjusting the shaftv and grinding wheel parallel to the axis of the needle, the adjustments herein specified predetermining the contour'which will be givento the needle point by the grinding wheel when the aforesaid sliding v member is operated to engage the grinding wheel wheel shaft in a predeterminable relationship tosaid needle, said supporting devices including bearings for the grinding wheel shaft extending laterally to the drilling needle and carried by a plurality of slides having guides arranged at right angles to each other so that one of said slides may be slid in a direction crosswise of the axis of said grinding wheel shaft-and another of said slides may be slid lengthwise of the shaft in a direction crosswise of the axis of the needle to effect the grinding of a predetermined shape of the drilling point of the needle.

3. In apparatus of the character described having a drilling needle and means supporting the needle for rotation on a fixed axis, the combination comprising a grinding wheel carried by a shaft extending laterally to the axis of said drilling needle and supporting devices for supporting said shaft in a predeterminable relationship to said. needle during a grinding operation, said supporting devices including a plurality of slides having guidesarranged at right angles to each other so that one of said slides may be moved in a directioncrosswise of the axis of said grinding wheel shaft and another of said slides may be moved to cause lengthwise movement of the shaft in a direction crosswise bearings being mounted on said pivoted member and disposed at right angles to-said pivot, means for adjusting the pivotal position of said mamber with respect to the upper'of saidslides and means for holding-said pivotal member in adjusted position.

4. In apparatus of the character described having a drilling needle and means supporting the needle for rotation on a fixedaxis, the com- 3 ation, said supporting devices including bearings for the grinding wheel shaft, a plurality of slides having guides arranged at right angles to each other so that one of said slides'may be moved 1 in a direction crosswise oi the axis of said-grinding wheel shaftand another'of said slides may be moved to cause lengthwise movement of the said slides, andmeans for adjusting the angularity f the bearings of said grinding wheelshaft with" respect to the needleso as to determine the location of the grinding wheel opposite, the end of the needle in accordance with the diameter of the grinding wheel.

'6. In apparatus of the character described having a'drilling needle and means supporting the needle for rotation on a. fixed axis, the combination comprising a grinding wheel carried by a shaft extending laterally to the axis of said drilling needle andsupporting devices for supporting said shaft in apredeterminable relationship to said needle during a grinding operation, said supporting devices including a plurality' of slides having guides arranged at right angles to each other so that one of said slides may be moved'in" a" direction crosswise of the {axis of said grindingwheel shaft and another of saidslides maybe moved tocause lengthwise movement of the shaft in a direction crosswise of the-axis of the needle, a-member"pivotally mounted on the upper-ofsaidslides, hearings in saidmember'for supporting said grindingwheel shaft, a turbine mounted upon said shaft and including a housing mounted upon said member,

and means formaintaining said pivoted member and shaft. in a fixed angular position'with re- -'spect to the guides ofsaid slides.

7. In apparatus 1 of the character described having a drilling needle and means supporting the needle for rotation on a fixed axis, the com- 'bination comprising a grinding wheel carried by bination comprising a grinding wheel carried by Y a shaft extending laterallyto the'axis of said drilling needle and supporting devices for supporting said shaft in a predeterminable relation- .a shaft extending laterally to the axis of said drilling needle and supporting devices for supporting said- ;s ha i5t ina predeterminable relationship to, said-needle during agrinding operation, saidsupporting'devicesincluding a pivoted ship to said needle during a grinding operation,

said supporting devices including a plurality of slides having guides arranged at right angles to, each other so that one of said slides may be moved in a direction crosswise of the axis of said gringing Wheel shaft and another of said'slides may be moved to cause lengthwise movement of the shaft in a direction crosswise ofthe axis of the needle, a pivoted member carried by a pivot on the upper of said slides, said pivot being ldis posed substantially parallel to the needle, bearings for said grinding wheel mounted on said pivoted member, and adjustable means for determining and fixing the angular position of said pivoted member to provide for the use of grinding wheels of different diameters.

5. In apparatus of the character-described having a drilling needle and means supporting the needle for rotation on a fixed axis, the combination comprising a grinding wheel carried by a shaft extending laterally to the axis of said drilling needle and supporting devicesefor supporting said shaft in a predeterminable relationship to said needle during a grinding opermember 'on which said grinding wheel shaft is mountedffor' rotation in a plane parallelto the supporting-means being 'slidable to carry the grinding wheel into and outer engagement with plane of the axis of the needle,' supporting means on which said pivoted member is mounted, said the needle, meansior -maintaining-the pivoted ing the-pivoted'member-on its pivot to, predetermlne-theammin't of .-material tobe ground from the needle 'during a needle sharpening 8.'In apparatus ofitheii'characterdescribed having a drilling needle i and means supporting the needle for rotation'o'n "a fixedaxis the combination comprising a grindingwheelcarried by a shaft extending laterally to the axisxof said drilling needle and supporting devices for supporting said shaftin a. predeterminable relationship to said needle during a-grin'ding operation, said supporting, devices including-a pivoted member, bearings for said grinding wheel shaft, said bearings being carried bysaid pivotedmembar and disposed at a right angle to the length of the needle, supporting means on which said pivoted member is mounted, said supporting means including a slide vertically separable from its supporting guide and slidable to carry the grinding wheel into and out of engagement with the needle, and means for maintaining the pivoted member in a fixed angular position with respect to said supporting means. 7

9. In apparatus of the character described having a drilling needle and means supporting the needle for rotation on a fixed axis, the combination comprising a grinding wheel carriedby a shaft extending laterally to the axis of said drilling needle and supporting devices for supporting said shaft in a predeterminable relationship to said needle with the axis of said needle intersecting the surface of-said grinding wheel during a grinding operation, said supporting devices including a pivoted member on which said grinding wheel is mounted-means piyotally supporting said member, carriage devices for the grinding wheel supporting member and its pivot means, said carriage devices being operable to move the grinding wheel lengthwise of its axis and laterally of the needle to engage the needle with the grinding wheel, and turbine means for rotating the grinding wheel, said turbine means being operable to rotate said grinding wheel in any position of the pivotmeans and carriage.

devices.

10. In apparatus of the character described having a drilling needle and means supporting the needle for rotation on a fixed axis, the combination comprising a grinding wheel carried by a shaft extending laterally to the axis of said drilling needle and supporting devices for supporting said shaft in a predeterminable relationshipto said needle with the axis of said needle intersecting the surface of said grinding wheel during a grinding operation, said support ing devices being 'slidably movable lengthwise of the grinding wheel shaft to engage the grinding wheel with the needle and slidably movable in another direction to locate the grinding-back position of the grinding wheel with respect to the point of the needle, and turbine means for rotating the grinding wheel shaft in all positions of the supporting devices.

MORRIS SIMONS.

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