US2928528A - Wire-drawing die - Google Patents

Wire-drawing die Download PDF

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Publication number
US2928528A
US2928528A US434034A US43403454A US2928528A US 2928528 A US2928528 A US 2928528A US 434034 A US434034 A US 434034A US 43403454 A US43403454 A US 43403454A US 2928528 A US2928528 A US 2928528A
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United States
Prior art keywords
wire
cross
passage
die
drawn
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Expired - Lifetime
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US434034A
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English (en)
Inventor
Roy M Kelday
Frederick L Hayden
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Steel Company of Canada Ltd
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Steel Company of Canada Ltd
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Publication date
Application filed by Steel Company of Canada Ltd filed Critical Steel Company of Canada Ltd
Priority to US434034A priority Critical patent/US2928528A/en
Priority to DEST8804A priority patent/DE1132081B/de
Priority to AT541654A priority patent/AT212249B/de
Priority to US820947A priority patent/US3158258A/en
Application granted granted Critical
Publication of US2928528A publication Critical patent/US2928528A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels for metal drawing
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B21C3/04—Dies; Selection of material therefor; Cleaning thereof with non-adjustable section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels for metal drawing
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels for metal drawing
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B21C3/12—Die holders; Rotating dies

Definitions

  • the term wire will'hereafter in this specification and claims he used in certain instances which will be obviousfrom the context, to, designate all such drawn metal products collectively.
  • the invention aiso relates to articles made from wire, particularly steel wire, e.g. nails, spikes, and other driven fastening devices, concrete reinforcement, barbed wire and non-skid gratings.
  • Wire of which the general'cross-sectional shape is uniform and uniformly oriented along the length of the wire. can at presentbe drawn insubstantially any desired cross-sectionai shape. Drawing effects a substantial cold working and a reduction in cross-sectional area of the wire, and drawn conventional wire exhibits throughout its structure and over its whole surface'cold drawn characteristics, which are more uniform the more nearly the general cross sectional shape of the wire is circular.
  • the grain flow lines canlbe seen to be uninterrupted and to lie Wholly in planes which include the longitudinal axis of the wire, though they are not easily detectable in the case of metals other than steel. No practicable way has so far been devised of drawing wire which is other than conventional, for example of drawing helical wire, i.e. wire having a general crosssectional shape which is non-circular and of which the,
  • first two ways of helixing are essentially batch as opposed to continuous operations, and all involve verysubstantial expense, with the result that, for example, the cost of threaded nails is very substantially greater than that of comparable ordinary nails.
  • the rolling operation tends to alter at least the desirable surface structure imparted to the article by the cold drawing, with the resultzth'anforexample, it no longer exhibits cold drawn atent 2,928,528 7 Patented Mar. 15,1960
  • the twisting operation furthermore, canbe carried out only onrelatively soft wire; it sets up torsional stresses in the article and mentionedv extreme practical diiticultyv of satisfactory maintenance; the fact that uniformityin the product is not achieved since itisnever practically possible to ensure that all the cutters or rollers act evenly ontthe wire'ythe' fact that ragged edges-are apt to be'produced along the crests of the helices; and the fact that only, indented shapes, such as crosses, 'as distinct: from straight sided shapes,,such.as squares; or convexlycurved shapes could in any-event be-made. Devices'of this type have apparently been constructed and experimented with.
  • wire is referred to orientation in such planes is-meant.
  • the cross-sectional shape or area or both,.may,jmorea According to the invention wire is,- in a single over, be made different at different points along the length of the wire.
  • Wire produced in accordance with the invention drawn with a general cross-sectional shape which is non-circular andof which the orientation is different at different points along the length of the wire, has all the desirable qualities of conventional drawn wire.
  • -lt exhibits cold drawn charaeaspae acteristics throughout its structure and over its whole surface and is substantially free'fr'orn torsional stresses, such torsional stresses-as it may have being merely those which arise from coiling and are found in conventional drawn wire.
  • the grain fiowjlines, where detectable, are substantially uninterrupted and lie substantially 'wholly'in planes including the longitudinal axis of the wire.
  • The'cross-sectional shape of wire produced according to the invention may be uniform along the length of the wire with its orientation varying helically' along that length, or the cross-sectional shape or area or both may be different at different points along the lengthof the wire.”
  • Wire of which the cross-sectional shape is uniform along its length is sometimes referred to hereinafter as wire of simple form, and wire of which the cross-sectional shape or area is different at different points along its length is sometimes referred to as hereinafter as wire of complex form.
  • wire of simple form thei helical variation of its shape is of uniform lead along the length of the wire, and the cross-sectional shape and area is uniform along that length, though special steps may be taken controllably to vary the lead along the length of the wire.
  • improved barbed wire may be produced from wire a made according to the invention of simpleform, and irn-" diminishes in cross-sectional area over a substantial part of its working'length (i.e. that part of the passage with which thewire comes into contact While being drawn), but in a die according to the invention the whole part of the working length of thepassage which is of non-circular crosssection';is.-.helically twis ted about its longitudinal axis.
  • a die according to the invention is mounted so that it is permitted to rotate-about its longitudinal axis but is prevented from moving along that axis.
  • the maximum radial dimension of, the wire be greater than at least the minimum radial dimension of the passage at its effective cross-section (i.e. the minimum cross-sectionwhich determines the cross-section of the drawn wire);
  • maximum radial dimension is meant the radius of wire of which the minimum radial dimension is greater than the maximum radial dimension of the effective crosssection of the die passage.
  • a drawn wire of complex form may be produced according to the invention by drawing through a die according to the invention a wireof which the general cross-sectional shape is non-circular and of which the minimum radial dimenson is smaller than the maximum radial dimension of the effectve cross-sectiono'f the die passage, orby drawingthrough a die having a passage of which the general cross-sectional shape is non cir cular, a wire according to the invention'ofi simpleforfm and of which the minimum radial dimension is smaller than the maximum radial dimension of the, effective cross-section of the pas:
  • Figure '2 is a face view, partially diagrammatic, from the entry-side of one form of die according to the invention with a passage of square cross-sectional shape,
  • Figure 3 is. a'longitudinal section .on the line 3--3;
  • Figures 4 and 5 are cross-sections on the lines 4 -4 and 5-5 respectively of Figure 3
  • s Figure 6 is a face view from the entry side of another form of die according to the invention
  • Figure? is alongitudinal section of the line 7-7 of Figure 6,
  • Figures 8, 9 and 10 are cross-sections on the lines 8-8, 9.--9 and 10-10 respectively of' Figure 7,
  • Figure 11 is a face view of a die according to the in-' vention similar to that shown in Figure 2, except that the cross-section of the passage is oval,
  • Figure 12 is a diagram illustrating the terms maximum radial dimensionand minimum radial dimen-
  • Figure 15 is a cross-section onan enlarged scale of the wire of Figure 14,
  • Figure 16 is a perspective view ofan example of a wire of complex form'according ,to the invention.
  • Figure 17 is' a cross-section on the line 17-17 of Figure"16,
  • Figure 18 is a perspective view of another example of a wire of complex form according to the invention.
  • Figure19 is, a cross-section along the line 19-19 of 1 if Figure 18, i
  • Figure 20 is a perspective view of a further example of a wire, of complex form according to the invention, and i Figure 21 is a cross-sectionon the line 21-41 of,
  • Figure 1 illustrates, by way of example, one form of apparatus for practising the invention.
  • the base 1 has a transverse wall 2 near its rear formedcentrally with a sleeve 3 inwardly flanged at its rear end 4.
  • a die holder S- has a rear portion 6 within the sleeve3just fitting within the flange 4 and is supported for free rotation on'the base by ball bearings 7 held betweenthe sleeve 3 and portion 6.
  • a conventional soap box 8 through which the wire passes for lubricating purposes before entering the die;
  • the die 9.1s secured within the front portion lfl of the die holder 5 which extends into the soap box 8 through anopening in thm a walln t e-fla e 1 It it -sma tes tha ith iel W 11 s ntr an se u e in the di holde t secure uniformity inthe drawn-wire.
  • a ring121 is secured to the forwardend of the tront portion m'of the d s b ld nsi the sn p bo a and tt old.e t sl i radially flanged at 13 between the walls 2 and 11.
  • the purpose of these flanges is to protect the bearing7; from be n -rea h d by a so -hm .the bag a t baf in i p efe ably n eas by :PfllPMll be 14 on the fiangelawhich runs ina groove 15 in the wall 2.
  • Th ts earanses betw en th -par s r course exasssta s t d wi -fe sa e t e rer il tion.
  • An; angular wall 16,;se eured to therear end of the se defines w thth Qa -wa et e basee transverse wall La rd-the sleeve 3 an annular chamber 17 forthecoolingfluid to counteract the vfrictional heat de eloped he d d rins dra ngandzc v y hr the'die holder-to the bearing.
  • Coolinefluid is;ci rculated h quah th chamb r, .by in t and Outlet p pes 18 an 1.
  • the drawing die may be 'lISCd.
  • the invention may be practiced-in connection with bull blocks; rnoto blocks, both single and double deck; single block equipment; continuous drawing machines; and on the draw bench.
  • the passage may be made of. gradually diminishing cross-sectional area throughout the whole of its working length or throughout only a substantial .part thereof, being formed near the exit end with what is termed a bearing, i.e. a portion of uniform cross-sectional area along its length. in a die according to the present invention the passage may be formed in either of these ways, though the first is preferred.
  • Figures 2-5 illustrate a die according to the invention with a passage of which the general cross-sectional shape is square.
  • the square-cross-sectional shape of the passage is carried through its working length and the passage isof gradually diminishing cross-sectional area throughout this length.
  • The-Wire presented to the die is diagrammatically shown at 26) in both Figure 3 and Figure 4.
  • the-working length of the passage is the length between thepoint 21 where the wire to be drawn first comes into contact with the passage and the point 22 where the cross-sectional area oi the passage is at a minimum, the cross-section at the point 22 being that which determines the cross-section of the drawn wire and, being termed the effective cross-section of the passage.
  • the cross-sectional area of the passage gradually diminishes as shown by the dotted lines 24 in Figure 3. the .passage'flares outwardly in the relief 25.
  • T heydie passage illustrated in Figures 2 to -5 is --ini;the form-10f a truncated twisted steep-sided py arnid. withta square ,base, the lines following the arners ofthe pyramidheing helical paths as can bet-seen v in figured; from a,consi dera tion, of for example, ithe .line;334 join-ing the corner 35 of the -square'26 ,to the corresponding corner -56, of the square .33 and following the -;c a rn ers. -,o f ;t-h e i-nterveningsquares. This, ;line;,also appears in part in Figure 3.
  • Eigures 6 10 illustrate a formwf die according to the invention inwhichjthe-general cross-sectional shape of the Pas age, instead of being nomcircular',throughout the lengthgflffthe passage, ;iscircular over partof the working the dotted lines, 41-, and is helically twisted aboutits longiudina ax s- 7 in Figure .6 the orientation-and cross-sectional areaof thew-passage at the p0int138is shown by the four corners Aland that atthe point140 by the square 47.
  • the increas-' ingly extendedicorners 43' and 44 indicate the gradual develcptnentof the square cross-section.
  • oval is oval (thisiterm being used herein to mean an area bounded. by any closed continuous curve of which one axis is substantially larger than the other at right angles tojit).
  • the oval 48 showsv the cross-sectional areaand .erientat qm of. the entrance of. the passage, and theoval assures matically the gradual transition between these, the oval 50 indicating the area and orientation of the. beginning of the working length.
  • Wire is drawn-through apparatus of the invention in.
  • the lubricant should be onehaving a high fat content and high melting point;- A most satisfactory lubricant has been found to be Standard In- 'dustrial Ghemicals No. 621.; Special care should be taken in' starting the drawing, proceeding gently at 'first and increasing speed very gradually.
  • the wire should have a longtapered pointfree of slivers which advantageously ispulled snugly into the die and a second grip taken on itbefo re drawing starts. In the drawing, it has been founddesirable to have the wire travel ina straight line from a point'before it enters the die to the drawing block after it has passed through the die.
  • the die ordinarily rotates freely and without assistance by reason of the movement through” it of the wire to be drawn.
  • the greater is the maximum. helix angle'in' the passage i.e. the maximum acute angle which any tangent to the helical curve of, for example,a corner cross-section.
  • the resulting-drawn wire will'be of uniform lead throughout its length.
  • the lead of the drawn wire mayrhowevenbe controllably' varied along-the'length offlthe wire, if that is in any case desirable, by. periodically somewhatrestraining therotation of the die or by periodically increasing thetension on'the drawn' wire leaving-the die. for example bypassing this wirebe'tween the die and the drawing block over arotating eccentric of which the rotation' periodically increases -the length "ofthe'jpath to be trayell'edby the wire jbetween the die and block.
  • FIG. 1 -Fig 'ure' l2' is a diagram illustrating the expressions finaxirnum radial diinensiori'-andr'ninim um-radialdimensionfl which have been defined and I referred to. above.
  • the square represents thecross-section" of a wire or a passage.
  • the circle61 is, as will be seen, the smallest circle centred on the longitudinal axis 62 which could be circumscribed about the square 60.
  • the radius 63 of this circle is thus the maximum radial dimension of the square.
  • the circle 64 is the largest circle centred on the longitudinal axis 62 which would be inscribed within the square '60.
  • the radius 65 of this circle 64 is thus the radial dimension of the square 60.
  • the wire to be drawn is usually one having a general cross-sectional shape which is circular. If the radius of the wire to be drawn is greater than the maximum radial dimension of the effective cross-section of the die passage,.then the cross-sectional shape of the drawnvwire will be generally that of the effective crosssection of the passage.
  • Figure .13 illustrates such a drawn steel wire where the die. passage was of square -It will be 'seen that the cross-sectional shape. of the 'wire is square throughout but that its ori- 'entation varies helically alongthe length of-the wire.
  • the faint dotted lines along the surface of the wire illus' tratediagrammatically the grain flow lines which run, as in conventional wire, in line with the longitudinal axis though; since they run up over the crests and down acrossgthe valleys of the drawn. wire, they are sinuous. These grain flow lines, it will be seen, are uninterrupted and lie Whollyin planes which includeythe longitudinal axis of the wire.
  • FIG. 14 illustrates a.wire so produced with a die according tothe invention having a passage of square cross-sectional shape.
  • Figure 15 shows on an enlarged scale the general cross-sectional shape of this wire, which, it will ,be noted,;is square with rounded corners.
  • Figure 16 illustrates an example of wire made accordmg to the invention of complex form.
  • This wire is produced by drawing, through a die such as shown in Figures 2-5 a conventional wire of square cross-section, aside of the cross-section of the wire being shorter than the diagonal of the, effective cross-section of the passage.
  • the wire is of square cross-section, whereas atother points, e-.g. that at which the CI'OSSrSBCtiQH shown in Figure 17 is taken, the
  • some torsional forces in the wire to be drawn may be developed owing to the greater resistance presented to its passage through the die in certain relative orientations of the cross-sectional shapes of the Wire and the entrance to the die passage than in other such orientations. In such cases it may be desirable to restrain the wire to be drawn from any tendency to turn about its axis as it approaches the die.
  • threaded nails made from wire according to the invention enables the production of a variety of articles of improved characteristics and/or capable of being manufactured at substantial economies.
  • threaded nails made from wire according to the invention of simple form have all the desirable characteristics of presently available threaded nails and can be produced at far less cost-in fact at a cost not appreciably exceeding that of ordinary nails.
  • Threaded nails according to the invention may be made from wire produced by drawing through a die according to the invention, having a passage of square cross-section, a round wire of which the cross-sectional diameter is shorter than the length of a diagonal of the effective cross-section of the passage.
  • barbed wire consists of two strands of line wire twisted together with the barbs held between them, the use of two strands of line wire being, necessary to hold the barbs at the desired spacing along the length of the wire.
  • barbed wire may be made with a single line wire and barbs composed of wire according to the invention of simple form, preferably with a general cross-sectional shape which is polygonal with sharp corners. Normally the cross-sectional shape will be square or triangular. wrapped around the line wire in the usual way, resist displacement along it by reason of the engagement of their corners with its surface.
  • the converse arrangement of a single helixed line wire of simple form and barbs of conventional wire may be used.
  • Such barbs when reinforcement is ,ordinarily,.made..of,conventionalgtrolled or drawn rods.
  • Drawn rods have an appreciably-greatertensile strength than those that are'rolled, and'building specifications consequently allow a substantial increas'tn designed load where the reinforcement consists of drawn rods than when it consists of those that are rolled.
  • concrete reinforcing rods may be produced having advantages unobtainable in any such rods pre- .viously available.
  • Concrete reinforcing rods according to I the invention are drawn with different cross-sectional areas and shapes along their length.
  • the rods are formed as described in connection with Figure 18, the lead of one helix. being desirably different from that of the other. They thus have the tensile strength of conventional drawn rods together with the advantages of increased bonding provided by the patterned rolled rods referred to above.
  • rods according to the invention substantially higher designed loads in reinforced concrete structures are possible than with any rods previously available. This advantage is particularly significant for pre-stressed concrete construction where bonding of the steel reinforcement to the concrete is of special importance.
  • Non-skid gratings are used for a variety of purposes, for example, as the treads and landings of steel stairways and ladders, the non-skid feature being particularly im-' portant in circumstances where oil or grease is present, for example, in ships engine rooms.
  • One form of nonskid gratings at present widely used is one having bars of rectangular section running in one direction and helically twisted rods on top of'these bars in a direction at right angles to them. The rods are forged down into the upper surface of the bars, this forging down being necessary to bring the upper surface of the bars into substantially the same plane as the upper surface of the rods, so that the bars act to arrest slippage in the direction of the helix angle of the rods.
  • a non-skid grating of entirely satisfactory characteristics is produced at a greatsaving of cost by forming the sectional shapes at different points along the length of the rods.
  • a satisfactory non-skid grating may be composed of such rods running in one direction only, the presence of rods or bars running in a direction at right angles being unnecessary for prevention of skidding because the rods referred to, being of complex rather than simple form, themselves ofl'er resistance to skidding in all directions.
  • a wire drawing die having a passage therethrough of gradually diminishing cross-sectional area throughout a substantial part of its working length, said passage having a general cross-sectional shape which is non-circular over at least a substantial portion of its working length and being helically twisted about its longitudinal axis throughout said portion of non-circular cross-sectional shape, whereby a wire drawn by said die is characterized by crests and valleys wherein grain flow.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
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US434034A 1954-06-02 1954-06-02 Wire-drawing die Expired - Lifetime US2928528A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US434034A US2928528A (en) 1954-06-02 1954-06-02 Wire-drawing die
DEST8804A DE1132081B (de) 1954-06-02 1954-09-28 Verfahren zum Herstellen kaltgereckten, unrundgeformten Drahtes od. dgl. mit sich ueber die Laenge des Drahtes laengs einer Schraubenlinie aenderndem Querschnitt
AT541654A AT212249B (de) 1954-06-02 1954-09-29 Kaltgezogener Draht mit von der Kreisform abweichendem Massivquerschnitt sowie Verfahren und Vorrichtung zu seiner Herstellung
US820947A US3158258A (en) 1954-06-02 1959-06-17 Wire and method of its production

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US434034A US2928528A (en) 1954-06-02 1954-06-02 Wire-drawing die
US820947A US3158258A (en) 1954-06-02 1959-06-17 Wire and method of its production

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US820947A Expired - Lifetime US3158258A (en) 1954-06-02 1959-06-17 Wire and method of its production

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Cited By (11)

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US3038592A (en) * 1958-10-07 1962-06-12 Canada Steel Co Wire drawing die
US3468006A (en) * 1963-03-21 1969-09-23 Kooperativa Foerbundet Electric lamp filament
US3695083A (en) * 1970-04-21 1972-10-03 Canada Steel Co Axial thrust spinning head for rotating dies
US3713323A (en) * 1968-10-30 1973-01-30 I Ivanier Die for cold drawing
US3935723A (en) * 1972-12-29 1976-02-03 British Steel Corporation Wire processing machine
US4055073A (en) * 1976-09-16 1977-10-25 Sigma Lutin, Narodni Podnik Drawing die for elongated twist bodies
US4377083A (en) * 1979-09-18 1983-03-22 Shepherd Dale H Tube corrugating apparatus and method
US5181560A (en) * 1990-10-17 1993-01-26 Burn Mark N Baffleless tube and shell heat exchanger having fluted tubes
WO2009083295A1 (en) * 2008-01-03 2009-07-09 Nv Bekaert Sa Manufacturing a fastener with profile drawing
US20150158098A1 (en) * 2012-03-16 2015-06-11 Sodetal Awt Sawing wire, method and equipment for manufacturing such a wire, and use
CN108555045A (zh) * 2018-05-10 2018-09-21 浙江海亮股份有限公司 一种管材拉拔模具

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US3735625A (en) * 1970-07-28 1973-05-29 Naniwa Seitel Co Ltd Apparatus for producing helical wires, rods, bars and the like
US3883371A (en) * 1973-02-21 1975-05-13 Brunswick Corp Twist drawn wire
US3961514A (en) * 1973-02-21 1976-06-08 Brunswick Corporation Twist drawn wire, process and apparatus for making same
US4300378A (en) * 1979-03-08 1981-11-17 Sinnathamby Thiruvarudchelvan Method and apparatus for forming elongated articles having reduced diameter cross-sections
US4723759A (en) * 1986-12-17 1988-02-09 Davis Walker Corporation Welded wire fence panel
HU204452B (en) * 1989-12-07 1992-01-28 December 4 Drotmuevek Steel wire for reinforcing embedding material first for reinforcing concrete and method for producing such steel wire
US6449834B1 (en) * 1997-05-02 2002-09-17 Scilogy Corp. Electrical conductor coils and methods of making same
US7617847B1 (en) * 2006-12-01 2009-11-17 Clerkin Thomas M Apparatus and method for forming wire
EP2341956B1 (de) 2008-10-06 2015-12-23 Indiana University Research and Technology Corporation Verfahren und vorrichtung für aktive oder passive unterstützung in einem kreislaufsystem
DE102010014560A1 (de) 2010-04-10 2011-10-13 Schaeffler Technologies Gmbh & Co. Kg Wälzkörper sowie Verfahren zu dessen Herstellung
WO2013131827A2 (en) * 2012-03-09 2013-09-12 Nv Bekaert Sa Strand, cable bolt and its installation
TW201716157A (zh) * 2015-11-11 2017-05-16 Nat Chung-Shan Inst Of Science & Tech 旋轉擠壓成型模具及其所製成的長型金屬件
EP3293836B1 (de) * 2016-09-08 2019-04-17 Schleifring GmbH Verfahren zur herstellung von kontaktdrahten für schleifringe, vorrichtung zur herstellung von kontaktdrahten für schleifringe und kontaktdrahten für schleifringe

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US3468006A (en) * 1963-03-21 1969-09-23 Kooperativa Foerbundet Electric lamp filament
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WO2009083295A1 (en) * 2008-01-03 2009-07-09 Nv Bekaert Sa Manufacturing a fastener with profile drawing
US20150158098A1 (en) * 2012-03-16 2015-06-11 Sodetal Awt Sawing wire, method and equipment for manufacturing such a wire, and use
US9352404B2 (en) * 2012-03-16 2016-05-31 Sodetal Awt Sawing wire, method and equipment for manufacturing such a wire, and use
CN108555045A (zh) * 2018-05-10 2018-09-21 浙江海亮股份有限公司 一种管材拉拔模具

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Publication number Publication date
AT212249B (de) 1960-12-12
US3158258A (en) 1964-11-24
DE1132081B (de) 1962-06-28

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