FR2820661A1 - Apparatus for metal drawing without significant wear of the die comprises a threaded tube screwed into threaded sleeve that is inserted into a large rectangular block - Google Patents

Abstract

Apparatus for drawing metals in the form of a wire, a rod, a tube or a non-cylindrical shape comprises a threaded tube (1) screwed into a threaded sleeve (2), which, in turn, is inserted into a large rectangular block (3) welded on casting plates. An aperture (5) supplies high pressure, high viscosity lubricant to the object (18) being drawn. The assembly can be adapted for liquid lubricants. The threaded tube (1) has significant thickness, Rockwell hardness (HRC) 58, and Vickers hardness (HV) 3500. The cone section of the threaded tube (1) conforms perfectly to the angle of the die (11). The two contact surfaces (8) of the threaded tube (1) have a mirror-finish with surface roughness (Ra) of 5/100 microns. The working dies comprise micro-grains of tungsten carbide compacted by hot isostatic pressing. The dies can comprise industrial ceramics selected from nitrides, carbides or borides having very high hardness of above 1200 HV, or industrial diamonds having very high density and hardness of above 3000 HV. The threaded tube (1) and non-threaded (floating) tubes used in subsequent passes through the die, and set into position by the operator, are cylindrical or conical at an angle of 0-12 degrees. The metal drawing lubricants are greases or oils of viscosity of 20-3500 centistokes, with or without the following additives: graphite, molybdenum disulfide, metallic or metallic alloy powders, polymers in powder or liquid/wax form, or calcium or sodium stearate, palmitate or oleate powders optionally doped with extreme pressure elements.

Description

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The present invention relates to a device for drawing or stretching ferrous or non-ferrous metals in the form of a wire, bar, tube or non-cylindrical profile by applying high pressure pulls in front of the working cone of the wire rod. drawing (7) of Figure 2, thereby creating an anti-wear film, with selected lubricants.

In the current state of the art, namely the drawing and drawing of metals, the tribological conditions are such that the production plants are confronted with anticipated wear of the sectors, thus significant budgets, wear metalization, capstans, exaggerated consumption of wire drawing soap, the creation of surface defects on the wires. All these points combined lead in addition to the manufacturer to reduce by 30 to 50% the speed of the machines, this, by the force of things.

The device according 1'lvenLio prmet d '? to remedy, quantitatively and qualitatively, all these disadvantages inherent in the aforementioned trades.

 The accompanying drawings illustrate the invention: FIG. 1 represents a view from above of the device of the invention. Figure 2 shows in section a specific area of this device. Figure 3 shows the three mechanical parts of this device, 1.2, 3 (seen from above).

Figure 4 shows the part (4) in section.

Figure (5) a tube (16) not threaded.

 There are 2 kinds of tubes (1) and (16) page 2/3 and 3/3: the threaded tubes, which are an integral part of the device according to the invention.

 -the unthreaded tubes.

Threaded or not, there are 3 dimensional models of tubes to be able to cover the whole range of diameters of wire to be drawn.

 In Figure 1, the workpiece (3) is a square 60X60m / m steel (XC48) welded to the flanges of the coulter after a meticulous alignment. The tube (1) of high thickness and high hardness, is terminated by a mirror-polished cone (8) which fits perfectly into the tungsten carbide mirror polished cone of the die (11). The tightening under strong pressure is done by the threaded sleeve (2) which is provided with a

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 hexagon nut (10); a flat part (9) makes it possible to hold the tube during its plating in the cone of the die.

 In FIG. 1: the two surfaces (8) have undergone a mirror-polished type glaze, ie a Ra (roughness) = 5/1002 micron.

 The cylindrical dies (ll), according to the European ISO model, are housed in a thick bronze ring (12), which itself is inserted into the door (13).

exigu (6) jusqu'en (4), et joue ainsi le rôle d'un véritable piston < Les pressions en (7), figure 2, sont trés élevées ; supérieures à 2000 Bars quand les valeurs de l'entrefer (6) et la longueur du tube (1) sont optimisés ; le Tableau de la page 5 donne des valeurs a titre non limitatif. La zone (4) bénéficie d'un écoulement lamellaire, hydrodynamique ce qui a pour conséquence "d'infléchir" le métal avant le point d'impact sur la piste en carbure. The lubricant, grease or oil of high viscosities, flows in (5) by means of a translucent funnel adjusted to the diameter of the hole (5). The ring (14) makes it possible to receive a die / guide with a greater diameter of 20/1009-due m / m than that of the diameter of the wire (18). The wire, with its speed and roughness leads to the lubricant "extreme pressure" in the corridor

small (6) up to (4), and thus plays the role of a real piston <The pressures in (7), Figure 2, are very high; greater than 2000 bars when the values of the gap (6) and the length of the tube (1) are optimized; the Table on page 5 gives non-limiting values. The zone (4) benefits from a hydrodynamic lamellar flow which has the effect of "bending" the metal before the point of impact on the carbide track.

 As a result, the "drawing ring" on the carbide cone disappears and with it, the anticipated deterioration of the die.

(The "wire drawing ring" is a halo on the cone (8) of the tungsten carbide due to the impact of the metal that arrives at high speed and at high pressures under which the carbide track (8) is undergoing. the death of the industry, he has always been known in the industry, but real solutions have not been made.)
The device according to the invention acts on this precise point, and visceral for the drawer.

 The device according to the invention thus makes it possible to eliminate the "Retapage" operation, which is expensive and tedious for the manufacturer.

 The film (15) of high compactness and lamellar structure, repeated several times, will play a real role Anti-wear; it constitutes the primary objective of the device according to the invention so that the drawers can rotate at the speeds provided by the manufacturers.

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By way of non-limiting example, the internal conicity of the two types of tubes (1) and (16) will further increase the "compacting" pressures of the selected lubricant film; in particular in (7) Figure 2.

 Page 6 gives the characteristics of the threaded tubes.

Page 5 gives the characteristics of unthreaded tubes, also called Floating Tubes.

On multipasses having 61 12 passes and more, the device according to the invention is used on 50% of the first passes, on the other 50% of the machine, the manufacturer can use the floating tubes (not threaded).

He will decide their number on the multipass.

According to a variant of Figure 5, the angle (17) will be 0 (cylindrical tube) to 12, knowing that the recommended angle of the device according to the invention is 1, 5 *
The device according to the invention describes a series of threaded tubes (1) which are given on page 6.

Page 5 gives the range of unthreaded tubes (floating).

Page 7 gives the instructions for mounting the tubes according to diameters 1 draw with the two formulas (a) and (b) for calculating the inner diameter increment (yes) of the tubes.

 Pages 5 and 6 show: - a Rockwell C (HRC) hardness slice of 58 to 64 for a 100C6 grade for guidance. The hardness scale can range from 58 HRC (Rockwell hardness C) to 3500 HV (Vickers hardness) through metal carbides or industrial ceramics, thick tubes to resist bursting.

écrouire : -des graisses au graphite, ou au bisulfure de molybdène, ou avec des poudres métalliques, ou avec des ajouts d'alliages métalliques, ou avec des polymères type anti-friction ou autres (Téflon, etc.... ). Lubricants will, depending on the type of product

oil sealer: greases with graphite, or with molybdenum disulphide, or with metal powders, or with additions of metal alloys, or with anti-friction or other type polymers (Teflon, etc.).

 fats without the aforementioned additives; non-limiting, the Extreme-pressure and others.

à titre non limitatif, de 200 a 3500 Centistokes, en visant la These 2 types of fats (runny) will have a high viscosity,

not limited to 200 to 3500 Centistokes, with a view to

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fourchette 800 à 1200 Centistokes à 75 , préférenciellement, ou encore, des savons mous, coulants, de viscosité également 200
3500Cst charges en corps gras connus pour leurs propriétés extrême pression et à utiliser quand les produits finis nécessitent un lavage à l'eau ; cite a titre d'exemple non limitatif.

range 800 to 1200 Centistokes to 75, preferably, or soft, flowing soaps, also viscosity 200
3500Cst fillers in fats known for their extreme pressure properties and to be used when finished products require washing with water; cited by way of non-limiting example.

 The dies will be of tungsten carbide, of the "micro-grain" type, made according to the HIP (high isostatic pressure) process, manufactured by the current major carburetors.

 By way of non-limiting example, the dies used with the device according to the invention may be constituted by industrial ceramics of very high hardness, for example: cermets, silicon nitrides, boron nitrides, boron carbides, etc. ..

 The device according to the invention is particularly designed, to create a zone (7) Figure 2, very high pressure on an extreme-pressure lubricant, lamellar structure thus creating a regime. remarkable hydrodynamics. Under these optimal conditions, the tube (1) serves pre-die "preparing" the final work of the die / calibrator.

 The device according to the invention, inexpensive, can easily adapt to all types of casting, (benches and multipasses) the device according to the invention is particularly intended to create a film of residual lubricant, highly compacted, for perfect tribological conditions when formatting by customers whose permanent concern is: the wear of their tools.

valeur de 5 à 10 1/1000de m/m, à titre indicatif ; compte tenu du film de lubrifiant qui est"roulé"sur le fil pour augmenter sa According to one of the variants of the invention, in the case of Wet Wiring, all metals combined, the device will be mounted in a "enclosing" tube represented by FIG. 4: the die 11, the non-threaded tube 16, the die 14 are all enclosed in a tube 19 of large thickness threaded at one end supporting a nut 20 of large gauge; the die 14 has a core / wire gap of 0 to a few hundredths of m / m, with a

value of 5 to 10 1 / 1000de m / m, as an indication; considering the film of lubricant that is "rolled" on the wire to increase its

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mouillabilité, des vitesses, des énergies cinétiques du lubrifiant "écrasé" sur le fil par la pince à rouleaux 21 se trouvant juste à l'amont de la filière"lamineuse", le dispositif selon l'invention crée un système Anti-Retour de lubrifiant ; à noter que la quantité de celui-ci qui passe par l'entrefer est 3 à 4 fois supérieure a la quantité du film d'interface fil/fliere ; ce film subit un haut degré de compacification grâce au triple phénomène congugé de : l'exiguité de l'entrefer de la filère 14, de l'effet de couloir du tube de longueur et d'entretoise non limitées et du phénomène de "coin"du couloir conique d'un angle (17) de 1, 7 donne à titre non limitatif. Les deux joints cuivre 22 assurent l'étanchéité de l'ensemble.

wettability, speeds, kinetic energies of the lubricant "crushed" on the wire by the roller clamp 21 located just upstream of the "laminator" die, the device according to the invention creates a lubricant anti-return system ; note that the amount of it that passes through the air gap is 3 to 4 times greater than the amount of the interface film wire / fliere; this film undergoes a high degree of compacification thanks to the triple phenomenon of: the narrowness of the gap of the filere 14, the passage of the tube of length and spacer not limited and the phenomenon of "corner" the conical passage of an angle (17) of 1, 7 gives non-limiting. The two copper gaskets 22 seal the assembly.

5/100'due Ra environ et l'angle de travail, communément appelé 2 < < sera de 6 à 160 avec une valeur, à titre indicatif, de 8 . Les lubri- -fiants liquides ou pateux seront constituesde préférence, par des molécules de grande taille, de forte anisotropie, qui ont une bonne tenue aux fortes Contraintes de Cisaillement et au"vieillisse- - ment"mecanique et thermique : soit des polymères, copolymères à longue chaine, des savons solubles dopés ou non, des cires, des paraffines, des silicones, donnés à titre non limitatif. In the case of Wet Weaving, and especially for very hard metals (more than 2000 MPa), the materials of the dies will be of a hardness higher than 1500 HV by aiming 3500/4000 HV by way of indicative and not limiting, the polishing of the working cone will be

5 / 100'due Ra about and the working angle, commonly called 2 <<will be 6 to 160 with a value, indicative, of 8. The liquid or pasty lubricants will preferably be constituted by large molecules of high anisotropy which have good resistance to high shear stresses and mechanical and thermal "aging": either polymers or copolymers. long chain, soluble soap doped or not, waxes, paraffins, silicones, given in a non-limiting manner.

 To increase the compressibility of the lubricant, it must be free of micro-air bubbles in its mass. citing as an example the power transmission oils.

The optimized conjugation of the aforementioned Criteria allows to have in. (, 7) very high pressures, to influence the metal in (4) and, consequently, obtaining a lamellar facies hydrodynamic regime-as a result of the good lubricant mentioned above-and considerable minimization of the "point d ' impact "of metal arriving at high speed; these conditions combine to make the presence of the "Wire Drawing Ring" which exists even on very hard materials, diamonds;
As a result, the filières "wear out", but without getting damaged, and the Internal Rolling in Workshop of the filières finally becomes possible and consequently for the Producer of the metal involved, the suppression of the operation "Retapage" which is expensive and fastidious; on the Multipasses, only the "Finished" sectors are

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- 6neuves, les autres, dans le corps de la machine proviennent du système RITA-Roulement Interne sur le TAs, des filières, cité précédemment.

- 6news, the others, in the body of the machine come from the RITA-Internal Rolling System on the TAs, dies, cited above.

Page 7 gives a non-limiting range of internal diameters of tubes which may be either cylindrical or preferably tapered at an angle of 1.5, given as an indication, of unlimited length.

 Because of its objectives of a Tribological nature of the use of metals in the form of long products, by drawing or drawing operation, the device according to the invention with its two main targets: dry track and wet track, is really intended to honor the objectives of the aforementioned Trade, namely: the productivity of the machines by applying the speeds designed by the Constructor, the reduction. of the "Budjet Dies", the Quality of the surface condition of the hardened products, the Longevity of the metallization of the capstans and the control of the costs of the drawing lubricants.

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V 01 E WET * l * Either submerged or semi-emerged machine or by bubbling.

* Liquid or pasty / greasy soaps.

 * Table of dimensions of tubes for 2 types of Cylindrical Diamond Dies: 42 X 30 and 28 X 16. (Diameter and thickness). in m / m. gives as an example and not limiting.

* Range of drawn copper wires: 8.00 to 0.70 m / m.

------------

<Tb>
<tb> DIMENSIONS <SEP> OF <SEP> TUBES
<tb>#is<SEP> of <SEP> children <SEP> angle
<tb> * <SEP> *
<tb> 8.40 / 7.60 <SEP> 1.5 <SEP> Calculation <SEP> of <SEP> increment <SEP>#is:
<tb> 7.00 / 6, <SEP> 20 <SEP> 42, <SEP> 5 <SEP>"<SEP> 6.70 / 5.51 <SEP>"<SEP> i = <SEP> 2 <MS> x <SEP> ln <SEP> (8.40 / 1, <SEP> 60) <SEP> = <SEP> 3.326
<tb> 5.80 / 5, <SEP> 30 <SEP> 42, <SEP> 5 "5, <SEP> 50/4, <SEP> 70 <SEP>"<SEP> nb <SEP> from <SEP > not <SEP> = <SEP> 9
<tb> 5.00 / 4, <SEP> 30 <SEP> 28, <SEP> 5 <SEP>"<SEP> 4.69 / 3.71 <SEP>"<SEP> i <SEP> = <SEP > 3,316 / 9 <SEP> = <SEP> 0.3678
<tb> 4.00 / 3, <SEP> 50 <SEP> 28, <SEP> 5 <SEP>"<SEP> 3, <SEP> 70/3, <SEP> 01 <SEP>"
<tb> 3,30 / 3, <SEP> 00 <SEP> 28, <SEP> 5 <SEP>"<SEP> 3, <SEP> 00/2, <SEP> 51 <SEP>"<SEP># is <SEP> = <SEP> 8, <SEP> 40 <SEP> x <SEP> e #### <SEP> = <SEP> 8, <SEP> 40 <SEP> x <SEP> 0.3678
<tb> 2.80 / 2, <SEP> 40 <SEP> 28, <SEP> 5 <SEP> It <SEP> 2, <SEP> 50/2, <SEP> 01
<tb> 2.30 / 2, <SEP> 00 <SEP> 28, <SEP> 5 "2, <SEP> 00/1, <SEP> 61
<tb> 1, <SEP> 90/1, <SEP> 60 <SEP> 28, <SEP> 5 <SEP>"<SEP> 1, <SEP> 60/1, <SEP> 31
<tb> 1.60 / 1, <SEP> 30 <SEP> 28, <SEP> 5 "1, <SEP> 30/1, <SEP> 00
<tb> 1.30 / 1, <SEP> 15 <SEP> 28, <SEP> 5 <SEP>"<SEP> 1.00 / 0.86
<tb> 1.10 / 0, <SEP> 95 <SEP> 28, <SEP> 5 <SEP>"<SEP> 0.85 / 0? 71
<tb> 0.90 <SEP> 28, <SEP> 5 <SEP>"<SEP> 0.70 <SEP>"
<Tb>
- is: inside diameter of tube outlet.

 - #ex: outer diameter of the tube / sleeve.

 - Lt: length of the tube / sleeve. in m / m.

 - tab): inside the tube (conical).

Note: In the pre-qualification phase of the device according to the invention, it is recommended, for comparison, to start with cylindrical inner tubes (angle = 0).

- Nuance of tubes / sleeve: Austenitic stainless steel (anti-corrosion).

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MODEL FLOATING TUBES (Basic tubes)

- Ra rugosité intérieure du tube. indicatif) <Tb>
<tb> Oi <SEP> L <SEP> 0 <SEP> ep <SEP> Ra <SEP> Tube <SEP> Hardness <SEP> Angle <SEP> Core
<tb> (mm) <SEP> ext <SEP> inside <SEP> Tone <SEP> HRC <SEP> cone
<tb> 19.40 <SEP> 220 <SEP> 27 <SEP> 3.80 <SEP> 2/10 <SEP> 100C6 <SEP> 58/64 <SEP> (a)
<tb> 17, <SEP> 30 <SEP> 4, <SEP> 85 <SEP> target <SEP> to
<tb> 60 <SEP> fixed @
<tb> 15, <SEP> 40 <SEP> 5.8
<tb> 13.80 <SEP> 6, <SEP> 6
<tb> 12, <SEP> 30 <SEP> 7.3
<tb> 11.00 <SEP> 8 <SEP>#
<tb> 9.80 <SEP> 8.6
<tb> 8, <SEP> 50 <SEP> 2 <SEP> 60 <SEP> to <SEP> title
<tb> 9.80 <SEP> 8.6
<tb> 8.50 <SEP> 9.2 <SEP> 60 <SEP> to <SEP> title
<tb> area code
<tb> 7.30 <SEP> 9.8
<tb> 6, <SEP> 30 <SEP> 140 <SEP> 20 <SEP> 10, <SEP> 3
<tb> 5, <SEP> 50 <SEP> 7, <SEP> 2
<tb> 4, <SEP> 80 <SEP> 7.6
<tb> 4, <SEP> 10 <SEP> 7, <SEP> 9
<tb> 3, <SEP> 60 <SEP> 8.2
<tb> 3, <SEP> 10 <SEP> 8.4
<tb> 2, <SEP> 70 <SEP> 8.6 <SEP> to
<tb> 2.30 <SEP> 8.8 <SEP> fix
<tb> 2.10
<tb> 1, <SEP> 75 <SEP> 90 <SEP> 9 <SEP> 3, <SEP> 62
<tb> 1, <SEP> 50 <SEP> 3, <SEP> 75
<tb> 1, <SEP> 30 <SEP> 3, <SEP> 85
<tb> 1, <SEP> 153, <SEP> 92
<tb> 1, <SEP> 00 <SEP>#<SEP>#<SEP> 4.0 <SEP>#<SEP>#<SEP>#<SEP>#
<Tb>
- # i inside diameter. -HRC Rockwell hardness C. -Ep thickness of-tube-core (from the die-to-title

- Ra interior roughness of the tube. code)

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MODELS OF THREADED TUBES

<Tb>
<tb>#<SEP> i <SEP> L <SEP> 0 <SEP> ep <SEP> Ra <SEP> Tube <SEP> Hardness <SEP> Angle <SEP> Core
<tb> (mm) <SEP> ext <SEP> inside <SEP> Tone <SEP> HRC <SEP> cone
<tb> 19, <SEP> 40 <SEP> 220 <SEP> 27 <SEP> 3, <SEP> 80 <SEP> 2/10 <SEP> u <SEP> 100C6 <SEP> 58/64 <SEP> ( at)
<tb> 17.30 <SEP> 4.85 <SEP> to
<tb> fix
<tb> 15, <SEP> 40 <SEP> 5.8
<tb> 13, <SEP> 80 <SEP> 6, <SEP> 6
<tb> 12, <SEP> 30 <SEP> 7.3
<tb> 11, <SEP> 00 <SEP> 8
<tb> 9.80 <SEP> 8.6 <SEP>#
<tb> 8.50 <SEP> 9.2 <SEP> 60 <SEP> to <SEP> title
<tb> area code
<tb> 7.30 <SEP> 9.8
<tb> 6.30 <SEP> 10.3
<tb> 5.50 <SEP> 7.2
<tb> 4, <SEP> 80 <SEP> 7.6
<tb> 4, <SEP> 10 <SEP> 7.9
<tb> 3, <SEP> 60 <SEP>#<SEP>#<SEP> 8.2
<tb> 3.10 <SEP> 220 <SEP> of which <SEP> 27+ <SEP> 8, <SEP> 4
<tb> 140 <SEP> threaded <SEP> 20 <SEP> in
<tb> plustard <SEP> tenmtna)
<tb> 2, <SEP> 70 <SEP> 8.6
<tb> 2, <SEP> 30 <SEP> 8.8 <SEP> to
<tb> fixed "
<tb> 2, <SEP> 10 <SEP>#<SEP>#<SEP> 9, <SEP> 0
<tb> 1, <SEP> 75 <SEP> 140 <SEP> of which <SEP> 20+ <SEP> 3.62
<tb> 90 <SEP> threaded <SEP> gen
<tb> termlnal
<tb> 1, <SEP> 50 <SEP> 3.75
<tb> 1, <SEP> 30 <SEP> 3, <SEP> 85
<tb> 1, <SEP> 15 <SEP> 3.92
<tb> 1, <SEP> 00 <SEP>#<SEP>#<SEP> 4.0 <SEP>#<SEP>#<SEP>#<SEP>#
<Tb>

-Symboles : idem que la page 5 et 7.

-Symbols: same as page 5 and 7.

<Desc / Clms Page number 10>

Tube assembly by 0 of wires

<Tb>
<tb>#i<SEP> Range <SEP>#<SEP> Model <SEP> Increment <SEP># @
<tb> yarn <SEP> in <SEP> mm <SEP> (mechanical) <SEP> In <SEP> mm <SEP> (mechanical)
<tb> 19.40 <SEP> 16.21 / 18, <SEP> 00 <SEP> 220 <SEP> to <SEP> baptize <SEP> to <SEP> baptize <SEP> a <SEP> 20.35 <SEP>%
<tb> 17.30 <SEP> 14.41 / 16.20 <SEP>#<SEP>#
<tb> 15.40 <SEP> 12.80 / 14.40
<tb> 13.80 <SEP> 11.31 / 12.80
<tb> 12, <SEP> 30 <SEP> 10.01 / 11, <SEP> 30
<tb> It, <SEP> 00 <SEP> 8,81 / 10, <SEP> 00 <SEP>#
<tb> 9.80 <SEP> 7.71 / 8, <SEP> 80 <SEP> b <SEP> 25 <SEP>%
<tb> 8.50 <SEP> 6.61 / 7, <SEP> 70
<tb> 7.30 <SEP> 5, <SEP> 71/6, <SEP> 60
<tb> 6.30 <SEP> 4, <SEP> 91/5, <SEP> 70 <SEP> 140
<tb> 5, <SEP> 50 <SEP> 4,31 / 4, <SEP> 90
<tb> 4.80 <SEP> 3.61 / 4.30
<tb> 4.10 <SEP> 3, <SEP> 21 / 3.60
<tb> 3.60 <SEP> 2, <SEP> 71/3, <SEP> 20
<tb> 3.10 <SEP> 2.31 / 2, <SEP> 70 <SEP> 220 <SEP> with
<tb> 140 <SEP> threaded
<tb> more <SEP> later
<tb> 2.70 <SEP> 1.91 / 2, <SEP> 30
<tb> 2.30 <SEP> 1.71 / 1, <SEP> 90
<tb> 2.10 <SEP> 1.51 / 1.70 <SEP>#
<tb> 1, <SEP> 75 <SEP> 1, <SEP> 31/1, <SEP> 50 <SEP>#<SEP> to <SEP> set <SEP> with <SEP> the user.
<Tb>

1, <SEP> 50 <SEP> 1, <SEP> 21/1, <SEP> 30 <SEP> A <SEP> same <SEP> machine <SEP> is <SEP> equipped
<tb> 1, <SEP> 30 <SEP> 1, <SEP> 01/1, <SEP> 20 <SEP> of the <SEP> Ii <SEP> device <SEP> according to
<tb> 1.15 <SEP> 0.81 / 1, <SEP> 00 <SEP> the invention <SEP> (tube <SEP> of <SEP> 220
<tb> or <SEP> 1 @ 0 <SEP> or <SEP> 90. <SEP>) <SEP>#
<tb> 1.00 <SEP>#<SEP> 0.80 <SEP>#
<Tb>

n =23 Formules de calculs de l'incrment diamtre a : D=19, 40. 0, 892son b : D= 9, 80. 0, 866on

n = 23 Formulas of calculations of the increment diameter a: D = 19, 40. 0, 892son b: D = 9, 80. 0, 866on

Claims (9)

1) Device for drawing or stretching ferrous and non-ferrous metals in the form of wire, bar, tube or non-cylindrical profile in that it is characterized by a threaded tube (1) screwed into a threaded sleeve (2) which itself is engaged in a square of strong section (3) welded to the flanges of the couleuse or soap box.  2) Device according to claim 1 characterized in that the range of tubes provided by page 6 are thick, hardness ranging from 58 HRC (hardness Rockwell C) to 3500 HV (Vickers hardness) and whose conical portion perfect wife - the angle of the fi The two surfaces in contact have undergone a "mirror-polish", a roughness of: Ra5 / IOC nicrc'n.  3) Device according to claim 2 characterized in that the caibures of the dies trav? are micro-grainscompacted according to the best HIP processes (HautePression Isostatic).  4) Device according to claim 2 characterized in that the dies are constituted by industrial ceramics type NitruresÇarbures or Borures of very high hardness, greater than 1200 HV (Vickers hardness); or industrial Diamonds, all structures combined, of high hardness and compactness, greater than 3000 HV (Vickers hardness).  5) Device according to one of the preceding claims characterized in that the drawing / drawing Lubricants are fats or oils of high viscosity ranging from 20 to 3500 Centistokes, with or without the following additives, without limitation: graphite, bisulfide molybdenum, powders or metal alloys, polymers in powder or liquid / waxy or, powders of the type: stearate, palmitate, calcium or sodium oleate doped or not with Extreme-pressure elements, gives non-limiting.  6) Device according to any one of the preceding claims characterized in that the threaded tubes (1) or non-threaded (16), of undetermined length but given as an indication, are cylindrical or conical, an angle ranging from

 0 to 12.  7) Device according to claim 6 characterized in that, in the case of drawing wet Wet more particular- <Desc / Clms Page number 12>  - ment, the assembly shown in Figure 6 will be more suitable for liquid lubricants, given the effect "check valve" of the die 14 whose gap fil / die will be 0 to a few hundredths of a m / m for the passage of the lubricant.

 8) Device according to one of the preceding claims characterized in that, for the Wet Way in particular, the selected lubricants will be of the type: macromolecules doped or not Extreme-pressure elements and whose conjugation of the emsenble will create a non-tear wire / die interface film due to its high compacification and the great anisotropy of the elements involved; As an indication, copolymers with a "pelota" and high molecular weight structure added with teflon micro-powders, ie P. T. F. E. will be chosen preferentially.  9) Device according to any one of the preceding claims characterized in that the Producer will fix himself, on the Benches and Multipasses any of the variants of the device according to the invention, the model of Figures 1 or 5 or 6, depending on the specifications and the metal involved.