EP0198779A2 - Drawing device for forming a tube starting from a metal strip - Google Patents

Drawing device for forming a tube starting from a metal strip Download PDF

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Publication number
EP0198779A2
EP0198779A2 EP86430010A EP86430010A EP0198779A2 EP 0198779 A2 EP0198779 A2 EP 0198779A2 EP 86430010 A EP86430010 A EP 86430010A EP 86430010 A EP86430010 A EP 86430010A EP 0198779 A2 EP0198779 A2 EP 0198779A2
Authority
EP
European Patent Office
Prior art keywords
mandrel
die
tube
block
conduit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86430010A
Other languages
German (de)
French (fr)
Other versions
EP0198779B1 (en
EP0198779A3 (en
Inventor
Annie épouse Shahum Ketanedjian
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shahum Christian
Original Assignee
Shahum Christian
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shahum Christian filed Critical Shahum Christian
Priority to AT86430010T priority Critical patent/ATE64701T1/en
Publication of EP0198779A2 publication Critical patent/EP0198779A2/en
Publication of EP0198779A3 publication Critical patent/EP0198779A3/en
Application granted granted Critical
Publication of EP0198779B1 publication Critical patent/EP0198779B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form

Definitions

  • the present invention relates to a die device for forming a tube from a metal strip.
  • the technical sector of the invention is that of tools used in the manufacture of tubular objects, in particular jewelry or similar articles.
  • the present invention relates to a new technique for using tubes regardless of their section: circular, oval, polygonal or other ...
  • the objective to be achieved is the manufacture of straight or curved tubes, from a metal ribbon or an alloy of common or precious metals, produced in a single pass by pulling said ribbon by means of a tool ensuring the joining of turned edges of the ribbon in a perfectly straight line.
  • Another objective is to produce a tube by mechanical traction of the ribbon being formed in order to obtain tube wound in a circular, oval or other manner ...
  • the die device for forming a tube from a metal strip, which is characterized in that it comprises a long die block, comprising, in the direction of the length and the passing right through, a conduit comprising an inlet orifice of larger section and an outlet orifice of smaller section and whose generatrices converge from the inlet orifice to the outlet orifice and in that the conduit is, in line with the inlet orifice, of a width slightly greater than that of said metal strip.
  • Said block is of a polygonal cross section and the inlet orifice and the outlet orifice of the conduit open on two plane faces parallel to each other and perpendicular to the longitudinal axis of said block.
  • the die block comprises a guide fin extending over all or part of the length of the duct and projecting inside the latter, which fin is parallel to the longitudinal axis of said duct and has the function of guiding the upturned edges of the metal strip during the drawing in order to obtain the joining of said edges in a rectilinear manner.
  • the die block includes a removable guide plate, fixed to the face of the block where the inlet opening of the conduit opens, which plate partially obstructs said orifice and has a straight edge located on the side and close to the longitudinal axis of the duct and on which edge the metal strip rests, this plate having the function of guiding said strip and of opposing its twisting during drawing, in order to obtain the joining of turned edges of the ribbon straight.
  • the die block comprises two removable guide plates fixed to the face of the block where said inlet opening of the duct opens, which plates almost completely obstruct said orifice and have a straight edge so that said edges are located on either side and close to the longitudinal axis of the conduit, which edges are spaced from each other by a distance slightly greater than the thickness of the metal strip, these two plates having the function of guiding said ribbon and of opposing its twisting during the drawing in order to obtain the joining of the turned edges of the ribbon in a rectilinear manner.
  • At least one of the plates comprises, on said rectilinear edge a notch located at the right of the longitudinal axis of the conduit to allow the passage of a metal wire constituting a core around which the metal ribbon is wound during drawing to form the tube.
  • the die block comprises inside the duct, a guide rod constituting a fixed core, coaxial with the duct and carried by a support plate fixed to the part of the block where the orifice opens out.
  • a guide rod constituting a fixed core, coaxial with the duct and carried by a support plate fixed to the part of the block where the orifice opens out.
  • 'inlet of the conduit and whose free end of said core extends slightly outside the outlet of the conduit and is of an outer contour parallel to the inner contour of said orifice, a space substantially equal to the thickness of the metallic strip being reserved between the core and the outlet opening of the conduit.
  • the angle formed by the wall of the conduit and the face where the outlet orifice of the die block opens is softened to avoid any metal tearing during the traction exerted on the strip.
  • said die block is removably mounted on a carriage movable horizontally in front of a horizontal mandrel driven in rotation by motor means and around which the mandrel winds the tube, coming from the die block, substantially perpendicular to the face of the block where the outlet opening of the conduit opens, which carriage is pivotally mounted about a horizontal axis parallel to the mandrel and comprises means for positioning it in inclination, so that the tube from the die block tangent to said mandrel.
  • Said drive means consist of a geared motor or a geared motor-variator fixed to a rectangular base whose output shaft of the reducer extends horizontally and said base comprises, opposite the output shaft, a fixed headstock having a point coaxial with said gearbox output shaft and in that the mandrel is removably placed between said gearbox and said headstock and is locked in rotation by one of its ends on the gearbox output shaft and is supported at its other end by said tip, which is mounted movable along its longitudinal axis in a horizontal housing reserved in said headstock, which comprises means for immobilizing the tip in position.
  • Said carriage is carried by a support mounted adjustable on the base so as to be able to be moved towards or away from the mandrel and comprises means for immobilizing it in position relative to the mandrel.
  • Said support consists of a base plate and two end posts perpendicular to said plate.
  • the carriage is made up of a die-carrying plate comprising two slides which cooperate with a set of two slides which are parallel to one another and anchored in two end pieces, said set of slides being pivotally mounted around two horizontal and coaxial shafts and carried by said amounts of ends of the support.
  • Said set of carriage-carrier slides is mounted adjustable in height on the two uprights of the support, which uprights have holes distributed over their height and capable of receiving said shafts around which said set of slides pivots.
  • the means for positioning the carriage and said set of slides in inclination consist of two abutment screws screwed at the end of two support legs pivotally mounted vertically on one or the other of said support uprights and immobilizable by position, which screw-stops are brought into contact with one or the other of the end pieces in which the slides are anchored and on either side of the pivot axis of said set of slides.
  • Said mandrel comprises, at its periphery, a groove wound in a helix with contiguous turns and over the length of the mandrel, the cross section of the groove of which corresponds to that of the tube coming from the filling.
  • the mandrel comprises a central core on which are attached two half-shells of an external semi-elliptical contour and means for assembling the half-shells and the core, which half-shells in place on said core are spaced from each other by a distance substantially equal to the width of the tube, so that after removal of the core can be released from the mandrel the tube wound in an ellipse.
  • the tube For the attachment of the tube to the mandrel, the latter comprises at one of its ends, a radial mortise opening at its periphery and intended to receive a stopper for driving the tube coming from the die block, which stopper has a hole in which the tube is passed and means for fixing the tube to the cleat.
  • the die device according to the invention thus makes it possible to produce the tube by rolling, without elongation of the metal ribbon or of alloy of common or precious metals, with a line of junction of the turned edges of the ribbon perfectly straight, without twisting or other defect .
  • FIGS. 1 and 2 of the drawing illustrate a die block according to the invention 1 in one embodiment. This is in the form of a parallelepiped of square section.
  • Said block could adopt any other external shape and thus be of any polygonal section or even be cylindrical.
  • Said block 1 comprises, in the direction of its length, a conduit 1 a having an inlet orifice of larger section 1b, for example circular which opens onto a face 1 c of the block and an outlet orifice 1d, of smaller circular section, which opens onto another face 1 e, parallel to said face 1 c.
  • the orifices 1b / 1d are joined by generators 1f which converge from the inlet orifice 1 towards the outlet orifice, so that the duct is of a frustoconical shape.
  • the die block is designed to communicate the most diverse shapes to the metallic ribbon, to generate tubes of all shapes, for example of a circular, rectangular, square, triangular, star, heart-shaped or other cross section.
  • the shape of the tube is given by the outlet port 1d.
  • the inlet of said block is, in one embodiment, of a circular cross section whose diameter is slightly greater than the width of the metal strip 2 which is shown in phantom in Figure 2.
  • the die block 1 comprises on the side of the inlet 1b and applied against the face 1 of the block, two 3/4 rectangular plates, which plates are by example fixed by means of screws 5 screwed into tapped holes reserved in the die block. These plates have rectilinear edges 3a / 4a which are spaced from each other by a distance d substantially equal to the thickness of the metal strip 2.
  • the ribbon 2 is formed as a point, as illustrated in FIG. 3 and is passed between the two plates 3/4.
  • the pointed end 2a which opens out from the outlet orifice 1d is gripped by means of pliers and the ribbon 2 is pulled manually until the die gives the ribbon the shape of the tube.
  • This can be obtained manually by continuing to exert traction on the metal strip or can be mechanically wound around a mandrel as will be explained below.
  • One of the plates may include a notch 3b reserved on the rectilinear edge 3a, which notch adopts for example the shape of a Vee and is located in line with the longitudinal axis 1a. This notch allows the passage of a metal wire (not shown) which constitutes a core around which the metal ribbon is wound.
  • the two 3/4 plates have the function of guiding the ribbon 2 and of opposing its twisting during traction in order to obtain the joining of the turned edges of the ribbon in a perfectly rectilinear manner.
  • the lateral edges 2c / 2d of the tape guided by the duct wall are rolled towards one another to come together by exiting through the outlet orifice 1 d to the desired shape of the tube which is communicated by said orifice 1d.
  • the die block 1 may have only one plate and the ribbon 2 is then guided by the single straight edge 3a of the plate 3.
  • FIG. 4 Another embodiment of the die block according to the invention is given in Figures 4 and 5.
  • the die block 1 is similar to that which has just been described with reference to Figures 1 and 2.
  • the outlet port 1 g which opens onto the face 1e is for example of a circular cross section.
  • the inlet 1h which opens onto the face 1b, is of a generally elliptical section so that the duct 11 is of a generally frustoconical shape.
  • the inlet 1 is such that its major axis 1h 1 is slightly larger than the width of the metal strip.
  • the duct 11 comprises a small 1 m fin, for example 6 / 10ths of a millimeter thick, which fin extends for example over a part of the length of the duct 11 and protrudes inside the latter.
  • Said fin is born at the periphery of the outlet orifice 1g, is of zero height at the level of said orifice and extends inwardly parallel to the axis of the duct, progressing in height so that its longitudinal edge 1 m, is substantially perpendicular to the face 1g of the die block.
  • the purpose of this fin is to guide the upturned edges of the metal strip during the traction exerted on the strip in order to obtain the joining of said edges in a perfectly rectilinear manner.
  • the angle formed by the wall of the conduit 11 and the face 1e where the outlet orifice 1g opens out is softened to avoid tearing of metal during the traction exerted on the strip.
  • the outlet 1g has for this purpose a flat 1g, for example with a width of 8/10 of a millimeter and extending over the internal periphery of the orifice 1g.
  • FIG. 6 and 7 Another embodiment of the die block is illustrated in Figures 6 and 7.
  • the die block 1 is similar to those which have just been described with reference to Figures 1, 2, 4 and 5.
  • the outlet orifice 1n which opens onto the face 1e is for example of a rectangular cross section.
  • the inlet 1p is of a rounded outline so that the duct 1q is of a generally frusto-conical shape.
  • This comprises a fin 1 r in all points identical to the fin lm described with reference to FIG. 4.
  • the block comprises inside the conduit 1q a guide rod 6 which constitutes a fixed core coaxial with the conduit 1q and extending approximately over the half-length of the block, which core 6 extends a rod of greater cross section 6a, fixed to a rectangular support plate 7, fixed by means of screws 8, for example 2 in number, screwed into tapped holes reserved in the block 1.
  • the support plate 7 is applied to the face 1 b where the orifice d opens 'entry 1q.
  • the core 6 / 6a is perpendicular to the plate 7 and is fixed to the latter by means of screws 9.
  • the plate 7 is fixed on the side of the fin 1 r.
  • the core 6 is of a rectangular cross section and has an external contour parallel to the internal contour of the outlet orifice 1 of the conduit.
  • a space e of a value substantially equal to the thickness of the metal strip is reserved between the core 6 and the outlet orifice 1 to allow the passage of the tube at the outlet of the die block.
  • the core 6 extends slightly outside the orifice 1 n. Its function is to perfectly calibrate the tube.
  • the fin 1 r makes it possible to obtain, as has already been explained above, the junction of the edges of the ribbon in a perfectly rectilinear manner.
  • FIGS. 8, 9 and 10 of the drawing illustrate a die device 10 for pulling by winding the tube coming from the die block 1.
  • This die device comprises a rectangular base 11 on which is mounted at one end a motor-reducer or a motor-reducer-variator 12 extending at right angles to the base 11 and projecting therefrom.
  • the variator comprises a control member 13 with a dial 13a which gives indications which make it possible to calibrate the machine as a function of the actual revolutions of the output shaft of the reducer.
  • the motor is connected, by a cable 14, to a control box 15, itself connected to the sector by another cable 16.
  • the output shaft 12a of the gear motor 12 is hollow and extends horizontally and parallel to the longitudinal edges 11a of the base 11.
  • the base 11 Opposite the output shaft 12a of the reduction gear, the base 11 comprises a fixed headstock 17 in which is mounted a point 18 which is coaxial with said shaft 12a of the reduction gear.
  • the tip 18 is mounted adjustable in the headstock 17 in a horizontal cylindrical housing 17a, which crosses the headstock in the longitudinal direction of the base 11.
  • the point 18 extends a cylindrical axis 18a having the same diameter as the cylindrical housing 17a of the headstock 17 , which axis has a flat 18a ,.
  • the adjustment in position of the tip 18 on the headstock 17 is obtained by means of a pressure screw 19 screwed into a tapped hole reserved for the upper part of the headstock 17.
  • a removable mandrel 20 which comprises, at one end, a shaft end 20a which penetrates into the hollow shaft 12a of the reduction gear, the rotation drive being effected by the through a keyway 21.
  • the hollow shaft has a longitudinal groove in which is engaged a key secured to the shaft end 20a of the mandrel.
  • the mandrel has a conical hole 20b into which the tip 18 of the headstock penetrates.
  • the mandrel 20 is of an external shape which is a function of the objects which it is desired to obtain.
  • the mandrel 20 is cylindrical. It is smooth in the case of the manufacture of objects having a square or rectangular cross section.
  • the mandrel 20 comprises, at its periphery and over its almost length, a groove wound in a helix 20c with contiguous turns, the section of which corresponds to the external dimension of the tube. This groove provides a regular winding of the tube from the die block 1.
  • the device comprises a set of two slides 21/22, which are horizontal and parallel to each other and are embedded in two end pieces 23/24.
  • This assembly which adopts the shape of a rectangle, is pivotally mounted around two horizontal and coaxial shafts 25/26, which shafts are engaged in holes 27 reserved in the two uprights 28a / 28b of a support 28, in support on the base 11.
  • This support 28 consists of a rectangular base plate 28c at the ends of which said uprights 28a / 28b are fixed, which are perpendicular to said plate 28c.
  • the support is mounted to be movable so that it can be moved towards or away from the mandrel 20.
  • the base plate 28c has two lumens 28d, located on the side of the uprights 28a / 28b and perpendicular to the longitudinal edges of the plate 28c.
  • the support 28 in position on the base 11 is obtained by two screws 29 passed through the lumens 28d and screwed into tapped holes 11 b, reserved in the base 11.
  • the set of slides 21/22 is adjustable in height so that it can be positioned as a function of the size of the mandrel 20. This adjustment is made possible by several holes 27 distributed over the height of the uprights 28a / 28b and through which the shafts have passed. 26/27.
  • a carriage 30 On the set of slides 21/22 is slidable a carriage 30, which is thus horizontally displaceable in front of said mandrel 20.
  • This carriage consists of a die-carrying plate 30a to which two slides 30b / 30c are fixed to screw means 31.
  • the slides are of the linear rolling type.
  • the die holder plate 30a comprises a square section housing 30a, intended to receive the die block 1 which is of a corresponding cross section.
  • the set of slides 21/22 / carriage 30, is pivotally mounted around of said trees 26/27.
  • the positioning in inclination of the carriage 30 and of all of the slides 21/22 is obtained by two stop screws 32/33 screwed into threads reserved for the end of two support lugs 34/35, pivotally mounted in a plane vertical around two screws 36/37 screwed into the upright 28b of the support 28.
  • the support legs 34/35 are first positioned by pivoting them around the previously loosened screws 36/37 so as to place the stop screws 32 / 33 on either side of the pivot axis of the set of slides 21/22, tighten the screws 36/37 and act on the stop screws 32/33 until stalling at the inclination desired said set of slides 21/22 carrying the carriage 30.
  • the tube first formed by manual traction in the die block 1, is fixed to the mandrel 20 by means of a driving cleat, two embodiments of which are given in FIGS. 13 and 14
  • the mandrel 20 has at its end located on the side of the shaft end 20a, a radial mortise 20d of a rectangular cross section corresponding to that of the cleat.
  • This 38 in the embodiment of Figure 13, is in the form of a small rectangular parallelepiped and has a hole 38a, passing right through, and through which the free end of the tube.
  • the tube is fixed to the cleat 38 by means of a pressure screw 39.
  • the cleat 40 similar to the cleat 38, has a hole 40a passing right through it through which the tube has passed and a second hole 40b, perpendicular and adjacent to the hole 40a and in which hole 40b has passed a clamping screw 41, screwed into a tapped hole 20e made in the bottom of the mortise 20d. Under the effect of the tightening of the screw 41, the cleat is moved in the mortise 20d, which has the effect of blocking the tube between the cleat 40 and the periphery of the mandrel 20.
  • the gear motor is then actuated to drive the mandrel in rotation and the tube, coming from the die 1, is wound around the mandrel with contiguous turns.
  • the free mounting on slide of the carriage 30 allows the winding of the tube over the length of the mandrel 20.
  • the die block 1 is kept engaged in the housing 30a of the carriage under the effect of the traction exerted on the tube.
  • the withdrawal of the tube is obtained by "unscrewing" the tube winding.
  • the mandrel 42 consists of a core, for example cylindrical 42a comprising at one end a shaft end 42b engaged in a bore 42c and pinned to the by means of a mechanical pin 43 engaged in holes 42d / 42e extending diametrically to the core 42a and to the end of the shaft 42b.
  • the core has a coaxial conical housing 42f.
  • the mandrel also comprises two half-shells 42 1/42 2 an outer contour, for example substantially half-elliptical and an inner outline substantially semi-cylindrical, so as to perfectly fit on the cylindrical core 42a. The two half-shells are in opposition so that, as shown in FIG.
  • the mandrel is of an elliptical cross section. They extend over the quasi-length of the core 42a and comprise, at their ends, semi-annular shoulders with a substantially semicircular external contour 42a, / 42, b -42 2 a / 42 2 b.
  • the assembly of the two half-shells 42, / 42 2 on the core 42a is carried out by means of a pin 44, engaged free in a cylindrical conduit 42g, extending diametrically to the core 42a and corresponding with two holes 42h / 42j reserved in the annular shoulders 42, a / 42, a.
  • a ring 45 comprising a first bore 45a, of a diameter slightly greater than the diameter of the core 42a and a second concentric bore 45b slightly greater than the external diameter of the shoulders 42 1 a / 42 2 a, has the function of maintaining both the two half-shells and maintain the pin 44.
  • the depth of the bore 45b is substantially equal to the length of said shoulders.
  • a second ring 46 identical to the ring 45, overlaps the shoulders 42 1 b / 42 2 b.
  • This ring 46 has a atésage 46a of a diameter slightly greater than that of the core 42a and a second concentric bore 46b, slightly larger than the outer diameter of shoulders 42 1b / 42 2 b.
  • the ring 46 is held in position by a pressure screw 47, screwed into a tapped radial hole 46c and coming to bear on the core 42a.
  • the ring 45 is held by a screw 48 screwed into a tapped radial hole 45c and bearing on the core 42a.
  • the two half-shells 42 1/42 2 are spaced from each other by a distance d, substantially equal to the width of the tube, for example a cylindrical tube: its diameter.
  • They include, at their periphery, a helical groove 42 1 c / 42 2 c in which the tube from the die block 1 is wound.
  • the screw 47 is loosened and the ring 46 is slid over the core until the shoulders 42, b / 42, b are released.
  • the screw 48 is then loosened and the other ring 45 is slid to release the shoulders 42 1 a / 42 2 has half-shells and the pin 44 which falls by gravity escapes.
  • the ring 42a is removed by sliding it relative to half-shells 42 1/42 2.
  • the said half-shells are then brought closer until their longitudinal edges 42, d / 42 2 d come into contact with one another and the tube winding is removed.
  • One of the half-shells 42 comprises a radial mortise 42, d for placing therein one of the drive lugs 38/40 described with reference to FIGS. 13 and 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

La présente invention a pour objet un dispositif de filière pour former du tube à partir d'un ruban métallique (2), caractérisé en ce qu'il comporte un bloc de filière long (1) comportant dans le sens de la longueur et le traversant de part en part, un conduit (1a/1l/1q) comportant un orifice d'entrée (1b, 1h, 1p) de plus grande section et un orifice de sortie (1d/ 1g/ 1n) de plus petite section et dont les génératrices convergent de l'orifice d'entrée vers l'orifice de sortie et dont le conduit (1a/1l/1q) est, au droit de l'orifice d'entrée (1b/1h/1p) d'une largeur légèrement supérieure à celle dudit ruban métallique (2) et en ce que le bloc de filière (1) est monté de façon amovible sur un chariot (30), déplaçable horizontalement devant un mandrin horizontal (20) entraîné en rotation par des moyens moteurs et autour duquel mandrin (20) s'enroule le tube issu du bloc de filière (1) sensiblement perpendiculairement à la face du bloc (1e) où débouche l'orifice de sortie (1d/1g/1n) du conduit, lequel chariot (30) est monté pivotant autour d'un axe horizontal, parallèle au mandrin (20) et comporte des moyens (32/33/34/35/36/37) pour le positionner en inclinaison de telle sorte que le tube issu du bloc de filière (1) tangente ledit mandrin (20).The subject of the present invention is a die device for forming a tube from a metal strip (2), characterized in that it comprises a long die block (1) comprising lengthwise and passing through it. right through, a conduit (1a / 1l / 1q) comprising an inlet orifice (1b, 1h, 1p) of larger section and an outlet orifice (1d / 1g / 1n) of smaller section and whose generators converge from the inlet orifice to the outlet and whose conduit (1a / 1l / 1q) is, to the right of the inlet orifice (1b / 1h / 1p) of a slightly greater width to that of said metal strip (2) and in that the die block (1) is removably mounted on a carriage (30), horizontally displaceable in front of a horizontal mandrel (20) driven in rotation by motor means and around which mandrel (20) winds the tube coming from the die block (1) substantially perpendicular to the face of the block (1e) where the outlet orifice (1d / 1g / 1n) of the co nduit, which carriage (30) is pivotally mounted about a horizontal axis, parallel to the mandrel (20) and comprises means (32/33/34/35/36/37) for positioning it in inclination so that the tube from the die block (1) tangent to said mandrel (20).

Description

La présente invention a pour objet un dispositif de filière pour former du tube à partir d'un ruban métallique.The present invention relates to a die device for forming a tube from a metal strip.

Le secteur technique de l'invention est celui des outillages entrant dans la fabrication d'objets tubulaires notamment des articles de bijouterie ou similaires.The technical sector of the invention is that of tools used in the manufacture of tubular objects, in particular jewelry or similar articles.

On connaît les filières avec lesquelles on étire le métal dans le but de le transformer en fil d'une section déterminée.We know the dies with which we stretch the metal in order to transform it into a wire of a given section.

On conna'it également des dispositifs pour fabriquer du tube par roulage au moyens de galets formeurs.There are also known devices for manufacturing tube by rolling by means of forming rollers.

La présente invention est relative à une nouvelle technique pour la mise en oeuvre de tubes quelle que soit leur section : circulaire, ovale, polygonale ou autre ...The present invention relates to a new technique for using tubes regardless of their section: circular, oval, polygonal or other ...

L'objectif à atteindre est la fabrication de tubes droits ou courbes, à partir d'un ruban de métal ou en alliage de métaux communs ou précieux, réalisés en une seule passe par traction dudit ruban au moyen d'un outillage assurant la jonction des bords retournés du ruban selon une ligne parfaitement droite.The objective to be achieved is the manufacture of straight or curved tubes, from a metal ribbon or an alloy of common or precious metals, produced in a single pass by pulling said ribbon by means of a tool ensuring the joining of turned edges of the ribbon in a perfectly straight line.

Un autre objectif est de réaliser un tube par traction mécanique du ruban en cours de formation dans le but d'obtenir du tube enroulé de façon circulaire, ovale ou autre ...Another objective is to produce a tube by mechanical traction of the ribbon being formed in order to obtain tube wound in a circular, oval or other manner ...

Ces objectifs sont atteints par le dispositif de filière selon l'invention pour former du tube à partir d'un ruban métallique, lequel se caractérise en ce qu'il comporte un bloc de filière long, comportant, dans le sens de la longueur et le traversant de part en part, un conduit comportant un orifice d'entrée de plus grande section et un orifice de sortie de plus petite section et dont les génératrices convergent de l'orifice d'entrée vers l'orifice de sortie et • en ce que le conduit est, au droit de l'orifice d'entrée, d'une largeur légèrement supérieure à celle dudit ruban métallique.These objectives are achieved by the die device according to the invention for forming a tube from a metal strip, which is characterized in that it comprises a long die block, comprising, in the direction of the length and the passing right through, a conduit comprising an inlet orifice of larger section and an outlet orifice of smaller section and whose generatrices converge from the inlet orifice to the outlet orifice and in that the conduit is, in line with the inlet orifice, of a width slightly greater than that of said metal strip.

Ledit bloc est d'une section droite polygonale et l'orifice d'entrée et l'orifice de sortie du conduit débouchent sur deux faces planes parallèles entre elles et perpendiculaires à l'axe longitudinal dudit bloc.Said block is of a polygonal cross section and the inlet orifice and the outlet orifice of the conduit open on two plane faces parallel to each other and perpendicular to the longitudinal axis of said block.

Dans un mode de réalisation, le bloc de filière comporte un aileron de guidage s'étendant sur tout ou partie de la longueur du conduit et faisant saillie à l'intérieur de celui-ci, lequel aileron est parallèle à l'axe longitudinal dudit conduit et a pour fonction de guider les bords retournés du ruban métallique lors du tirage en vue d'obtenir la jointure desdits bords de façon rectiligne.In one embodiment, the die block comprises a guide fin extending over all or part of the length of the duct and projecting inside the latter, which fin is parallel to the longitudinal axis of said duct and has the function of guiding the upturned edges of the metal strip during the drawing in order to obtain the joining of said edges in a rectilinear manner.

Selon un autre mode de réalisation, le bloc de filière comporte une plaquette de guidage amovible, fixée à la face du bloc où débouche l'orifice d'entrée du conduit, laquelle plaquette obstrue partiellement ledit orifice et comporte un bord rectiligne situé sur le côté et à proximité de l'axe longitudinal du conduit et sur lequel bord s'appuie le ruban métallique, cette plaquette ayant pour fonction de guider ledit ruban et de s'opposer à son vrillage lors du tirage, en vue d'obtenir la jointure des bords retournés du ruban de façon rectiligne.According to another embodiment, the die block includes a removable guide plate, fixed to the face of the block where the inlet opening of the conduit opens, which plate partially obstructs said orifice and has a straight edge located on the side and close to the longitudinal axis of the duct and on which edge the metal strip rests, this plate having the function of guiding said strip and of opposing its twisting during drawing, in order to obtain the joining of turned edges of the ribbon straight.

Selon un autre mode de réalisation, le bloc de filière comporte deux plaquettes de guidage amovibles fixées à la face du bloc où débouche ledit orifice d'entrée du conduit, lesquelles plaquettes obstruent quasi totalement ledit orifice et comportent un bord rectiligne de telle sorte que lesdits bords sont situés de part et d'autre et à proximité de l'axe longitudinal du conduit,' lesquels bords sont espacés l'un de l'autre d'une distance légèrement supérieure à l'épaisseur du ruban de métal, ces deux plaquettes ayant pour fonction de guider ledit ruban et de s'opposer à son vrillage lors du tirage en vue d'obtenir la jointure des bords retournés du ruban de façon rectiligne.According to another embodiment, the die block comprises two removable guide plates fixed to the face of the block where said inlet opening of the duct opens, which plates almost completely obstruct said orifice and have a straight edge so that said edges are located on either side and close to the longitudinal axis of the conduit, which edges are spaced from each other by a distance slightly greater than the thickness of the metal strip, these two plates having the function of guiding said ribbon and of opposing its twisting during the drawing in order to obtain the joining of the turned edges of the ribbon in a rectilinear manner.

Au moins une des plaquettes comporte, sur ledit bord rectiligne une échancrure située au droit de l'axe longitudinal du conduit pour permettre le passage d'un fil métallique constituant une âme autour de laquelle s'enroule le ruban métallique lors du tirage pour former le tube.At least one of the plates comprises, on said rectilinear edge a notch located at the right of the longitudinal axis of the conduit to allow the passage of a metal wire constituting a core around which the metal ribbon is wound during drawing to form the tube.

Selon un autre mode de réalisation, le bloc de filière comporte à l'intérieur du conduit, une tige de guidage constituant une âme fixe, coaxiale au conduit et portée par une plaque-support fixée à la partie du bloc où débouche l'orifice d'entrée du conduit et dont l'extrémité libre de ladite âme s'étend légèrement à l'extérieur de l'orifice de sortie du conduit et est d'un contour externe parallèle au contour interne dudit orifice, un espace sensiblement égal à l'épaisseur du ruban métallique étant réservé entre l'âme et l'orifice de sortie du conduit.According to another embodiment, the die block comprises inside the duct, a guide rod constituting a fixed core, coaxial with the duct and carried by a support plate fixed to the part of the block where the orifice opens out. 'inlet of the conduit and whose free end of said core extends slightly outside the outlet of the conduit and is of an outer contour parallel to the inner contour of said orifice, a space substantially equal to the thickness of the metallic strip being reserved between the core and the outlet opening of the conduit.

L'angle formé par la paroi du conduit et la face où débouche l'orifice de sortie du bloc de filière est adouci pour éviter tout arrachement de métal au cours de la traction exercée sur le ruban.The angle formed by the wall of the conduit and the face where the outlet orifice of the die block opens is softened to avoid any metal tearing during the traction exerted on the strip.

Selon l'invention, ledit bloc de filière est monté de façon amovible sur un chariot déplaçable horizontalement devant un mandrin horizontal entraîné en rotation par des moyens moteurs et autour duquel mandrin s'enroule le tube, issu du bloc de filière, sensiblement perpendiculairement à la face du bloc où débouche l'orifice de sortie du conduit, lequel chariot est monté pivotant autour d'un axe horizontal parallèle au mandrin et comporte des moyens pour le positionner en inclinaison, de telle sorte que le tube issu du bloc de filière tangente ledit mandrin.According to the invention, said die block is removably mounted on a carriage movable horizontally in front of a horizontal mandrel driven in rotation by motor means and around which the mandrel winds the tube, coming from the die block, substantially perpendicular to the face of the block where the outlet opening of the conduit opens, which carriage is pivotally mounted about a horizontal axis parallel to the mandrel and comprises means for positioning it in inclination, so that the tube from the die block tangent to said mandrel.

Lesdits moyens d'entraînement consistent en un moto-réducteur ou un moto-réducteur-variateur fixé à un socle rectangulaire dont l'arbre de sortie du réducteur s'étend horizontalement et ledit socle comporte, en face de l'arbre de sortie, une poupée fixe comportant une pointe coaxiale audit arbre de sortie du réducteur et en ce que le mandrin est placé de façon amovible entre ledit réducteur et ladite poupée et est calé en rotation par une de ses extrémités sur l'arbre de sortie du réducteur et est supporté à son autre extrémité par ladite pointe, laquelle est montée déplaçable suivant son axe longitudinal dans un logement horizontal réservé dans ladite poupée, laquelle comporte des moyens pour immobiliser la pointe en position.Said drive means consist of a geared motor or a geared motor-variator fixed to a rectangular base whose output shaft of the reducer extends horizontally and said base comprises, opposite the output shaft, a fixed headstock having a point coaxial with said gearbox output shaft and in that the mandrel is removably placed between said gearbox and said headstock and is locked in rotation by one of its ends on the gearbox output shaft and is supported at its other end by said tip, which is mounted movable along its longitudinal axis in a horizontal housing reserved in said headstock, which comprises means for immobilizing the tip in position.

Ledit chariot est porté par un support monté réglable sur le socle pour pouvoir être rapproché ou éloigné du mandrin et comporte des moyens pour l'immobiliser en position par rapport au mandrin.Said carriage is carried by a support mounted adjustable on the base so as to be able to be moved towards or away from the mandrel and comprises means for immobilizing it in position relative to the mandrel.

Ledit support se compose d'une plaque de base et de deux montants d'extrémités perpendiculaires à ladite plaque. Le chariot se compose d'une plaque-porte-filière comportant deux glissières qui coopèrent avec un ensemble de deux coulisses parallèles entre elles et ancrées dans deux pièces d'extrémités, ledit ensemble de coulisses étant monté pivotant autour de deux arbres horizontaux et coaxiaux et portés par lesdits montants d'extrémités du support.Said support consists of a base plate and two end posts perpendicular to said plate. The carriage is made up of a die-carrying plate comprising two slides which cooperate with a set of two slides which are parallel to one another and anchored in two end pieces, said set of slides being pivotally mounted around two horizontal and coaxial shafts and carried by said amounts of ends of the support.

Ledit ensemble de coulisses-porte-chariot est monté réglable en hauteur sur les deux montants du support, lesquels montants comportent des trous répartis sur leur hauteur et susceptibles de recevoir lesdits arbres autour desquels pivote ledit ensemble de coulisses.Said set of carriage-carrier slides is mounted adjustable in height on the two uprights of the support, which uprights have holes distributed over their height and capable of receiving said shafts around which said set of slides pivots.

Les moyens pour positionner en inclinaison le chariot et ledit ensemble de coulisses consistent en deux vis-butées vissées à l'extrémité de deux pattes-supports montées pivotantes dans le sens vertical sur l'un ou l'autre desdits montants du support et immobilisables en position, lesquelles vis-butées sont mises au contact de l'une ou l'autre des pièces d'extrémités dans lesquelles sont ancrées les coulisses et de part et d'autre de l'axe de pivotement dudit ensemble-de coulisses.The means for positioning the carriage and said set of slides in inclination consist of two abutment screws screwed at the end of two support legs pivotally mounted vertically on one or the other of said support uprights and immobilizable by position, which screw-stops are brought into contact with one or the other of the end pieces in which the slides are anchored and on either side of the pivot axis of said set of slides.

Ledit mandrin comporte, à sa périphérie, une gorge enroulée en hélice à spires jointives et sur la longueur du mandrin, dont la section droite de la gorge correspond à celle du tube issu de la fillière.Said mandrel comprises, at its periphery, a groove wound in a helix with contiguous turns and over the length of the mandrel, the cross section of the groove of which corresponds to that of the tube coming from the filling.

Pour réaliser des objets tubulaires d'un contour elliptique, le mandrin comporte un noyau central sur lequel sont rapportées deux demi-ccquilles d'un contour externe demi-elliptique et des moyens pour assembler les demi-coquilles et le noyau, lesquelles demi-coquilles en place sur ledit noyau sont espacées l'une de l'autre d'une distance sensiblement égale à la largeur du tube, de telle sorte qu'après enlèvement du noyau on puisse dégager du mandrin le tube enroulé en ellipse.To produce tubular objects with an elliptical contour, the mandrel comprises a central core on which are attached two half-shells of an external semi-elliptical contour and means for assembling the half-shells and the core, which half-shells in place on said core are spaced from each other by a distance substantially equal to the width of the tube, so that after removal of the core can be released from the mandrel the tube wound in an ellipse.

Pour l'accrochage du tube au mandrin, celui-ci comporte à l'une de ses extrémités, une mortaise radiale débouchant à sa périphérie et destinée à recevoir un taquet d'entraînement du tube issu du bloc de filière, lequel taquet comporte un trou dans lequel est passé le tube et des moyens pour fixer le tube au taquet.For the attachment of the tube to the mandrel, the latter comprises at one of its ends, a radial mortise opening at its periphery and intended to receive a stopper for driving the tube coming from the die block, which stopper has a hole in which the tube is passed and means for fixing the tube to the cleat.

Le dispositif de filière selon l'invention permet ainsi de réaliser du tube par roulage, sans allongement du ruban de métal ou en alliage de métaux communs ou précieux, avec une ligne de jonction des bords retournés du ruban parfaitement droite, sans vrillage ou autre défaut.The die device according to the invention thus makes it possible to produce the tube by rolling, without elongation of the metal ribbon or of alloy of common or precious metals, with a line of junction of the turned edges of the ribbon perfectly straight, without twisting or other defect .

D'autres avantages et les caractéristiques de l'invention ressortiront encore à la lecture de la description suivante d'un dispositif de filière en référence au dessin annexé sur lequel :

  • -la figure 1 est une vue en perspective d'un bloc de filière vu du côté de l'orifice de sortie du conduit;
  • -la figure 2 est une vue en perspective d'un bloc de filière vu du côté de l'orifice d'entrée du conduit;
  • -la figure 3 est une vue en coupe longitudinale du bloc de filière illustrant le ruban métallique formé en pointe et mis en place dans le conduit avant l'opération de tirage du ruban en vue du formage du tube;
  • -la figure 4 est une vue en élévatontcoupe partielle d'un bloc de filière comportant un aileron pour le guidage des bords retournés du ruban;
  • -la figure 4bis est une vue en coupe à plus grande échelle de l'orifice de sortie du bloc de filière;
  • -la figure 5 est une vue suivant F du bloc de filière de la figure 4;
  • -la figure 6 est une vue en élévation/coupe partielle d'un bloc de filière comportant à la fois un aileron de guidage et une âme interne au conduit en vue de réaliser notamment des tubes de section carrée ou rectangulaire;
  • -la figure 7 est une vue suivant F, du bloc de filière de la figure 6;
  • -la figure 8 est une vue en perspective d'un dispositif de filière selon l'invention;
  • -la figure 9 est une vue de dessus - schématique du dispositif de la figure 8;
  • -la figure 10 est une vue en coupe selon la ligne X X de la figure 9;
  • -la figure 11 est une vue en élévation d'un mandrin pour réaliser des objets selon un contour elliptique;
  • -la figure 12 est une vue en coupe du mandrin selon la ligne XII XII de la figure 11;
  • -la figure 13 est une vue en élévation partielle d'un mandrin illustrant un taquet de tirage du tube, vu en coupe et dans un mode d'exécution;
  • -la figure 14 est une vue en élévation partielle d'un mandrin illustrant un taquet de tirage du tube, vu en coupe et dans un autre mode d'exécution.
Other advantages and characteristics of the invention will emerge further on reading the following description of a die device with reference to the appended drawing in which:
  • FIG. 1 is a perspective view of a die block seen from the side of the outlet outlet of the conduit;
  • FIG. 2 is a perspective view of a die block seen from the side of the inlet opening of the conduit;
  • FIG. 3 is a view in longitudinal section of the die block illustrating the metal strip formed at the point and put in place in the duct before the ribbon pulling operation for the purpose of forming the tube;
  • FIG. 4 is a partial sectional elevation view of a die block comprising a fin for guiding the turned edges of the ribbon;
  • FIG. 4bis is a sectional view on a larger scale of the outlet orifice of the die block;
  • FIG. 5 is a view along F of the die block of FIG. 4;
  • FIG. 6 is an elevation view / partial section of a die block comprising both a guide fin and a core internal to the duct with a view to producing in particular tubes of square or rectangular section;
  • FIG. 7 is a view along F, of the die block of FIG. 6;
  • FIG. 8 is a perspective view of a die device according to the invention;
  • FIG 9 is a top view - schematic of the device of Figure 8;
  • FIG 10 is a sectional view along line XX of Figure 9;
  • FIG. 11 is an elevation view of a mandrel for producing objects along an elliptical contour;
  • FIG. 12 is a sectional view of the mandrel along the line XII XII of FIG. 11;
  • FIG. 13 is a partial elevation view of a mandrel illustrating a stopper for drawing the tube, seen in section and in one embodiment;
  • FIG. 14 is a partial elevation view of a mandrel illustrating a stopper for drawing the tube, seen in section and in another embodiment.

On se reporte d'abord aux-figures 1 et 2 du dessin qui illustrent un bloc de filière selon l'invention 1 dans un mode de réalisation. Celui-di se présente sous la forme d'un parallélépipède de section carrée.Reference is first made to FIGS. 1 and 2 of the drawing which illustrate a die block according to the invention 1 in one embodiment. This is in the form of a parallelepiped of square section.

On notera que ledit bloc pourrait adopter toute autre forme extérieure et ainsi être d'une section polygonale quelconque ou être même cylindrique. Ledit bloc 1 comporte, dans le sens de sa longueur, un conduit 1 a comportant un orifice d'entrée de plus grande section 1b, par exemple circulaire qui débouche sur une face 1 c du bloc et un orifice de sortie 1d,de plus petite section circulaire, qui débouche sur une autre face 1 e, parallèle à ladite face 1 c. Les orifices 1b/1d sont rejoints par des génératrices 1f qui convergent de l'orifice d'entrée 1 vers l'orifice de sortie, de telle sorte que le conduit est d'une forme tronconique.It will be noted that said block could adopt any other external shape and thus be of any polygonal section or even be cylindrical. Said block 1 comprises, in the direction of its length, a conduit 1 a having an inlet orifice of larger section 1b, for example circular which opens onto a face 1 c of the block and an outlet orifice 1d, of smaller circular section, which opens onto another face 1 e, parallel to said face 1 c. The orifices 1b / 1d are joined by generators 1f which converge from the inlet orifice 1 towards the outlet orifice, so that the duct is of a frustoconical shape.

Le bloc de filière est conçu pour communiquer au ruban métallique les formes les plus diverses, pour engendrer destubes de toutes formes, par exemple d'une section droite circulaire, rectangulaire, carrée, triangulaire, en étoile, en forme de coeur ou autres.The die block is designed to communicate the most diverse shapes to the metallic ribbon, to generate tubes of all shapes, for example of a circular, rectangular, square, triangular, star, heart-shaped or other cross section.

La forme du tube est donnée par l'orifice de sortie 1d. L'orifice d'entrée dudit bloc est, dans un mode d'exécution, d'une section droite circulaire dont le diamètre est légèrement supérieur à la largeur du ruban métallique 2 qui est représenté en traits mixtes à la figure 2.The shape of the tube is given by the outlet port 1d. The inlet of said block is, in one embodiment, of a circular cross section whose diameter is slightly greater than the width of the metal strip 2 which is shown in phantom in Figure 2.

Dans le mode d'exécution représenté aux figures 1 et 2, le bloc de filière 1 comporte du côté de l'orifice d'entrée 1 b et appliquées contre la face 1 du bloc, deux plaquettes rectangulaires 3/4, lesquelles plaquettes sont par exemple fixées au moyen de vis 5 vissées dans des trous taraudés réservés dans le bloc de filière. Ces plaquettes comportent des bords rectilignes 3a/4a qui sont espacés l'un de l'autre d'une distance d sensiblement égale à l'épaisseur du ruban métallique 2.In the embodiment shown in Figures 1 and 2, the die block 1 comprises on the side of the inlet 1b and applied against the face 1 of the block, two 3/4 rectangular plates, which plates are by example fixed by means of screws 5 screwed into tapped holes reserved in the die block. These plates have rectilinear edges 3a / 4a which are spaced from each other by a distance d substantially equal to the thickness of the metal strip 2.

Pour la mise en oeuvre du tube, le ruban 2 est formé en pointe, tel que cela est illustré à la figure 3 et est passé entre les deux plaquettes 3/4. L'extrémité pointue 2a qui débouche de l'orifice de sortie 1d est saisie au moyen d'une pince et le ruban 2 est tiré manuellement jusqu'à ce que la filière donne au ruban la forme du tube.For the implementation of the tube, the ribbon 2 is formed as a point, as illustrated in FIG. 3 and is passed between the two plates 3/4. The pointed end 2a which opens out from the outlet orifice 1d is gripped by means of pliers and the ribbon 2 is pulled manually until the die gives the ribbon the shape of the tube.

Celui-ci peut être obtenu manuellement en continuant à exercer une traction sur le ruban métallique ou peut être enroulé mécaniquement autour d'un mandrin comme cela sera exposé plus loin.This can be obtained manually by continuing to exert traction on the metal strip or can be mechanically wound around a mandrel as will be explained below.

Une des plaquettes,par exemple la plaquette 3, peut comporter une échancrure 3b réservée sur le bord rectiligne 3a, laquelle échancrure adopte par exemple la forme d'un Vé et est située au droit de l'axe longitudinal 1a. Cette échancrure permet le passage d'un fil métallique (non représenté) qui constitue une âme autour de laquelle s'enroule le ruban de métal.One of the plates, for example the plate 3, may include a notch 3b reserved on the rectilinear edge 3a, which notch adopts for example the shape of a Vee and is located in line with the longitudinal axis 1a. This notch allows the passage of a metal wire (not shown) which constitutes a core around which the metal ribbon is wound.

Les deux plaquettes 3/4 ont pour fonction de guider le ruban 2 et de s'opposer à son vrillage lors de la traction dans le but d'obtenir la jointure des bords retournés du ruban de façon parfaitement rectiligne.The two 3/4 plates have the function of guiding the ribbon 2 and of opposing its twisting during traction in order to obtain the joining of the turned edges of the ribbon in a perfectly rectilinear manner.

Au cours du déplacement du ruban 2 dans le conduit 1a, les bords latéraux 2c/2d du ruban guidés par la paroi de conduit sont roulés l'un vers l'autre pour venir se rejoindre en sortant par l'orifice de sortie 1 d à la forme désirée du tube qui est communiquée par ledit orifice 1d.During the displacement of the tape 2 in the duct 1a, the lateral edges 2c / 2d of the tape guided by the duct wall are rolled towards one another to come together by exiting through the outlet orifice 1 d to the desired shape of the tube which is communicated by said orifice 1d.

Le bloc de filière 1 peut ne comporter qu'une seule plaquette et le ruban 2 est alors guidé par le seul bord rectiligne 3a de la plaquette 3.The die block 1 may have only one plate and the ribbon 2 is then guided by the single straight edge 3a of the plate 3.

Un autre mode d'exécution du bloc de filière selon l'invention est donné aux figures 4 et 5. Le bloc de filière 1 est semblable à celui qui vient d'être décrit en référence aux figures 1 et 2. Selon ce mode de réalisation, l'orifice de sortie 1 g, qui débouche sur la face 1e est par exemple d'une section droite circulaire.Another embodiment of the die block according to the invention is given in Figures 4 and 5. The die block 1 is similar to that which has just been described with reference to Figures 1 and 2. According to this embodiment , the outlet port 1 g, which opens onto the face 1e is for example of a circular cross section.

L'orifice d'entrée 1h, qui débouche sur la face 1b, est d'une section généralement elliptique de telle sorte que le conduit 11 est d'une forme générale tronconoïdale. L'orifice d'entrée 1 est telle que son grand axe 1h1 est légèrement plus grand que la largeur du ruban métallique.The inlet 1h, which opens onto the face 1b, is of a generally elliptical section so that the duct 11 is of a generally frustoconical shape. The inlet 1 is such that its major axis 1h 1 is slightly larger than the width of the metal strip.

Le conduit 11 comporte un petit aileron 1 m, par exemple de 6/10ème de millimètre d'épaisseur, lequel aileron s'étend par exemple sur une partie de la longueur du conduit 11 et fait saillie à l'intérieur de celui-ci. Ledit aileron prend naissance à la périphérie de l'orifice de sortie 1g, est d'une hauteur nulle au droit dudit orifice et s'étend vers l'intérieur parallèlement à l'axe du conduit en progressant en hauteur de telle sorte que son bord longitudinal 1 m, est sensiblement perpendiculaire à la face 1g du bloc de filière. Cet aileron a pour fonction de guider les bords retournés du ruban métallique lors de la traction exercée sur le ruban dans le but d'obtenir la jointure desdits bords de façon parfaitement rectiligne.The duct 11 comprises a small 1 m fin, for example 6 / 10ths of a millimeter thick, which fin extends for example over a part of the length of the duct 11 and protrudes inside the latter. Said fin is born at the periphery of the outlet orifice 1g, is of zero height at the level of said orifice and extends inwardly parallel to the axis of the duct, progressing in height so that its longitudinal edge 1 m, is substantially perpendicular to the face 1g of the die block. The purpose of this fin is to guide the upturned edges of the metal strip during the traction exerted on the strip in order to obtain the joining of said edges in a perfectly rectilinear manner.

L'angle formé par la paroi du conduit 11 et la face 1e où débouche l'orifice de sortie 1g est adouci pour éviter un arrachement de métal au cours de la traction exercée sur le ruban. L'orifice de sortie 1g comporte à cet effet un méplat 1g, par exemple d'une largeur de 8/10ème de millimètre et s'étendant sur la périphérie interne de l'orifice 1g.The angle formed by the wall of the conduit 11 and the face 1e where the outlet orifice 1g opens out is softened to avoid tearing of metal during the traction exerted on the strip. The outlet 1g has for this purpose a flat 1g, for example with a width of 8/10 of a millimeter and extending over the internal periphery of the orifice 1g.

Un autre mode de réalisation du bloc de filière est illustré aux figures 6 et 7. Le bloc de filière 1 est semblable à ceux qui viennent d'être décrits en référence aux figures 1, 2, 4 et 5. Selon cet autre mode d'exécution, l'orifice de sortie 1n, qui débouche sur la face 1e est par exemple d'une section droite rectangulaire. L'orifice d'entrée 1p est d'un contour arrondi de telle sorte que le conduit 1q est d'une forme générale tronconoîdafe.Another embodiment of the die block is illustrated in Figures 6 and 7. The die block 1 is similar to those which have just been described with reference to Figures 1, 2, 4 and 5. According to this other embodiment execution, the outlet orifice 1n, which opens onto the face 1e is for example of a rectangular cross section. The inlet 1p is of a rounded outline so that the duct 1q is of a generally frusto-conical shape.

Celui-ci comporte un aileron 1 r en tous points indentique à l'aileron lm décrit en référence à la figure 4.This comprises a fin 1 r in all points identical to the fin lm described with reference to FIG. 4.

Le bloc comporte à l'intérieur du conduit 1q une tige de guidage 6 qui constitue une âme fixe coaxiale au conduit 1q et s'étendant environ sur la demi-longueur du bloc, laquelle âme 6 prolonge une tige de plus forte section 6a, fixée à une plaque-support rectangulaire 7, fixée au moyen de vis 8 par exemple au nombre de 2, vissées dans des trous taraudés réservés dans le bloc 1.La plaque-support 7 est appliquée sur la face 1 b où débouche l'orifice d'entrée 1q. L'âme 6/6a est perpendiculaire à la plaquette 7 et est fixée à celle-ci au moyen de vis 9.The block comprises inside the conduit 1q a guide rod 6 which constitutes a fixed core coaxial with the conduit 1q and extending approximately over the half-length of the block, which core 6 extends a rod of greater cross section 6a, fixed to a rectangular support plate 7, fixed by means of screws 8, for example 2 in number, screwed into tapped holes reserved in the block 1. The support plate 7 is applied to the face 1 b where the orifice d opens 'entry 1q. The core 6 / 6a is perpendicular to the plate 7 and is fixed to the latter by means of screws 9.

La plaquette 7 est fixée du côté de l'aileron 1 r.The plate 7 is fixed on the side of the fin 1 r.

L'âme 6 est d'une section droite rectangulaire et est d'un contour externe parallèle au contour interne de l'orifice de sortie 1 du conduit. Un espace e d'une valeur sensiblement égale à l'épaisseur du ruban métallique est réservée entre l'âme 6 et l'orifice de sortie 1 pour permettre le passage du tube à la sortie du bloc de filière. L'âme 6 s'étend légèrement à l'extérieur de l'orifice 1 n. Elle a pour fonction de calibrer parfaitement le tube. L'aileron 1 r permet d'obtenir, comme cela a déjà été exposé précédemment, la jonction des bords du ruban de façon parfàitement rectiligne.The core 6 is of a rectangular cross section and has an external contour parallel to the internal contour of the outlet orifice 1 of the conduit. A space e of a value substantially equal to the thickness of the metal strip is reserved between the core 6 and the outlet orifice 1 to allow the passage of the tube at the outlet of the die block. The core 6 extends slightly outside the orifice 1 n. Its function is to perfectly calibrate the tube. The fin 1 r makes it possible to obtain, as has already been explained above, the junction of the edges of the ribbon in a perfectly rectilinear manner.

On se reporte maintenant aux figures 8, 9 et 10 du dessin qui illustrent un dispositif de filière 10 pour tirer en l'enroulant le tube issu du bloc de filière 1.Reference is now made to FIGS. 8, 9 and 10 of the drawing which illustrate a die device 10 for pulling by winding the tube coming from the die block 1.

Ce dispositif de filière comporte un socle rectangulaire 11 sur lequel est monté à une extrémité un moto-réducteur ou un moto-réducteur-variateur 12 s'étendant à angle droit par rapport au socle 11 et débordant par rapport à celui-ci. De façon connue, le variateur comporte un organe de commande 13 avec un cadran 13a qui donne des indications qui permettent de faire l'étalonnage de la machine en fonction des tours réels de l'arbre de sortie du réducteur. Le moteur est relié, par un câble 14, à un bottier de commande 15, lui-même relié au secteur par un autre câble 16.This die device comprises a rectangular base 11 on which is mounted at one end a motor-reducer or a motor-reducer-variator 12 extending at right angles to the base 11 and projecting therefrom. In known manner, the variator comprises a control member 13 with a dial 13a which gives indications which make it possible to calibrate the machine as a function of the actual revolutions of the output shaft of the reducer. The motor is connected, by a cable 14, to a control box 15, itself connected to the sector by another cable 16.

L'arbre de sortie 12a du moto-réducteur 12 est creux et s'étend horizontalement et parallèlement aux bords longitudinaux 11 a du socle 11.The output shaft 12a of the gear motor 12 is hollow and extends horizontally and parallel to the longitudinal edges 11a of the base 11.

En face de l'arbre de sortie 12a du réducteur, le socle 11 comporte une poupée fixe 17 dans laquelle est montée une pointe 18 qui est coaxiale audit arbre 12a du réducteur. La pointe 18 est montée réglable dans la poupée 17 dans un logement cylindrique horizontal 17a, qui traverse la poupée dans le sens longitudinal du socle 11. La pointe 18 prolonge un axe cylindrique 18a ayant le même diamètre que le logement cylindrique 17a de la poupée 17, lequel axe comporte un méplat 18a,. Le réglage en position de la pointe 18 sur la poupée 17 est obtenu au moyen d'une vis de pression 19 vissée dans un trou taraudé réservé à la partie supérieure de la poupée 17.Opposite the output shaft 12a of the reduction gear, the base 11 comprises a fixed headstock 17 in which is mounted a point 18 which is coaxial with said shaft 12a of the reduction gear. The tip 18 is mounted adjustable in the headstock 17 in a horizontal cylindrical housing 17a, which crosses the headstock in the longitudinal direction of the base 11. The point 18 extends a cylindrical axis 18a having the same diameter as the cylindrical housing 17a of the headstock 17 , which axis has a flat 18a ,. The adjustment in position of the tip 18 on the headstock 17 is obtained by means of a pressure screw 19 screwed into a tapped hole reserved for the upper part of the headstock 17.

Entre la poupée 17 et le réducteur 12, est diposé un mandrin amovible 20, lequel comporte, à une extrémité, un bout d'arbre 20a qui pénètre dans l'arbre creux 12a du réducteur, l'entraînement en rotation se faisant par l'intermédiaire d'un clavetage 21. De façon connue, l'arbre creux comporte une rainure longitudinale dans laquelle est engagée une clavette solidaire du bout d'arbre 20a du mandrin.Between the headstock 17 and the reduction gear 12, there is a removable mandrel 20, which comprises, at one end, a shaft end 20a which penetrates into the hollow shaft 12a of the reduction gear, the rotation drive being effected by the through a keyway 21. In known manner, the hollow shaft has a longitudinal groove in which is engaged a key secured to the shaft end 20a of the mandrel.

A son autre extrémité, le mandrin comporte un trou conique 20b dans lequel pénètre la pointe 18 de la poupée.At its other end, the mandrel has a conical hole 20b into which the tip 18 of the headstock penetrates.

Le mandrin 20 est d'une forme extérieure qui est fonction des objets que l'on désire obtenir.The mandrel 20 is of an external shape which is a function of the objects which it is desired to obtain.

Pour la fabrication d'anneaux tubulaires circulaires, le mandrin 20 est cylindrique. Il est lisse dans le cas de la fabrication d'objets ayant une section droite carrée ou rectangulaire. Pour la fabrication d'anneaux d'une section droite circulaire, il comporte, à sa périphérie et sur sa quasi longueur, une gorge enroulée en hélice 20c à spires jointives dont la section correspond à la dimension externe du tube. Cette gorge permet d'obtenir un enroulement régulier du tube issu du bloc de filière 1.For the manufacture of circular tubular rings, the mandrel 20 is cylindrical. It is smooth in the case of the manufacture of objects having a square or rectangular cross section. For the manufacture of rings of a circular cross section, it comprises, at its periphery and over its almost length, a groove wound in a helix 20c with contiguous turns, the section of which corresponds to the external dimension of the tube. This groove provides a regular winding of the tube from the die block 1.

A hauteur du mandrin 20 et parallèlement à celui-ci, le dispositif comporte un ensemble de deux coulisses 21/22, lesquelles sont horizontales et parallèles entre elles et sont encastrées dans deux pièces d'extrémités 23/24. Cet ensemble, qui adopte la forme d'un rectangle, est monté pivotant autour de deux arbres 25/26 horizontaux et coaxiaux, lesquels arbres sont engagés dans des trous 27 réservés dans les deux montants 28a/28b d'un support 28, en appui sur le socle 11. Ce support 28 se compose d'une plaque de base rectangulaire 28c aux extrémités de laquelle sont fixés lesdits montants 28a/28b, lesquels sont perpendiculaires à ladite plaque 28c.At the height of the mandrel 20 and parallel thereto, the device comprises a set of two slides 21/22, which are horizontal and parallel to each other and are embedded in two end pieces 23/24. This assembly, which adopts the shape of a rectangle, is pivotally mounted around two horizontal and coaxial shafts 25/26, which shafts are engaged in holes 27 reserved in the two uprights 28a / 28b of a support 28, in support on the base 11. This support 28 consists of a rectangular base plate 28c at the ends of which said uprights 28a / 28b are fixed, which are perpendicular to said plate 28c.

Le support est monté déplaçable pour pouvoir être rapproché ou éloigné du mandrin 20. Pour ce faire, la plaque de base 28c comporte deux lumères 28d, situées du côté des montants 28a/28b et perpendiculairement aux bords longitudinaux de la plaque 28c. Le maintien en position du support 28 sur le socle 11 est obtenu par deux vis 29 passées à travers les lumères 28d et vissées dans des trous taraudés 11 b, réservés dans le socle 11.The support is mounted to be movable so that it can be moved towards or away from the mandrel 20. To do this, the base plate 28c has two lumens 28d, located on the side of the uprights 28a / 28b and perpendicular to the longitudinal edges of the plate 28c. The support 28 in position on the base 11 is obtained by two screws 29 passed through the lumens 28d and screwed into tapped holes 11 b, reserved in the base 11.

L'ensemble de coulisses 21/22 est réglable en hauteur pour pouvoir le positionner en fonction de la grosseur du mandrin 20. Ce réglage est rendu possible par plusieurs trous 27 répartis sur la hauteur des montants 28a/28b et dans lesquels sont passés les arbres 26/27.The set of slides 21/22 is adjustable in height so that it can be positioned as a function of the size of the mandrel 20. This adjustment is made possible by several holes 27 distributed over the height of the uprights 28a / 28b and through which the shafts have passed. 26/27.

Sur l'ensemble de coulisses 21/22 est onté à glissement un chariot 30, lequel est ainsi déplaçable horizontalement devant ledit mandrin 20. Ce chariot se compose d'une plaque-porte-filière 30a à laquelle sont fixées deux glissières 30b/30c au moyen de vis 31. Pour faciliter le glissement du chariot 30 sur les coulisses 21/22, les glissières sont du type à roulement linéaire.On the set of slides 21/22 is slidable a carriage 30, which is thus horizontally displaceable in front of said mandrel 20. This carriage consists of a die-carrying plate 30a to which two slides 30b / 30c are fixed to screw means 31. To facilitate the sliding of the carriage 30 on the slides 21/22, the slides are of the linear rolling type.

La plaque-porte-filière 30a comporte un logement de section carrée 30a, destiné à recevoir le bloc de filière 1 qui est d'une section droite correspondante.The die holder plate 30a comprises a square section housing 30a, intended to receive the die block 1 which is of a corresponding cross section.

De sorte que le tube issu du bloc de filière 1 qui s'étend sensiblement perpendiculairement au bord 1e dudit bloc où débouche l'orifice de sortie puisse tangenter le mandrin, l'ensemble de coulisses 21/22 / chariot 30, est monté pivotant autour desdits arbres 26/27. Le positonnement en inclinaison du chariot 30 et de l'ensemble des coulisses 21/22 est obtenu par deux vis-butées 32/33 vissées dans des taraudages réservés à l'extrémité de deux pattes-supports 34/35, montées pivotantes dans un plan vertical autour de deux vis 36/37 vissées dans le montant 28b du support 28.So that the tube coming from the die block 1 which extends substantially perpendicular to the edge 1e of said block where the outlet orifice opens can tangent the mandrel, the set of slides 21/22 / carriage 30, is pivotally mounted around of said trees 26/27. The positioning in inclination of the carriage 30 and of all of the slides 21/22 is obtained by two stop screws 32/33 screwed into threads reserved for the end of two support lugs 34/35, pivotally mounted in a plane vertical around two screws 36/37 screwed into the upright 28b of the support 28.

Pour caler en inclinaison l'ensemble de coulisses 21/22 et le chariot 30, on positionne d'abord les pattes-supports 34/35 en les faisant pivoter autour des vis 36/37 préablement desserrées de sorte à placer les vis-butées 32/33 de part et d'autre de l'axe de pivotement de l'ensemble de coulisses 21/22,on serre les vis 36/37 et on agit sur les vis-butées 32/33 jusqu'à caler à l'inclinaison voulue ledit ensemble de coulisses 21/22 porteur du chariot 30.To wedge the set of slides 21/22 and the carriage 30, the support legs 34/35 are first positioned by pivoting them around the previously loosened screws 36/37 so as to place the stop screws 32 / 33 on either side of the pivot axis of the set of slides 21/22, tighten the screws 36/37 and act on the stop screws 32/33 until stalling at the inclination desired said set of slides 21/22 carrying the carriage 30.

Le tube, d'abord formé par traction manuelle dans le bloc de filière 1, est fixé au mandrin 20 au moyen d'un taquet d'entraînement dont deux modes de réalisation sont donnés aux figures 13 et 14The tube, first formed by manual traction in the die block 1, is fixed to the mandrel 20 by means of a driving cleat, two embodiments of which are given in FIGS. 13 and 14

Le mandrin 20 comporte à son extrémité située du côté du bout d'arbre 20a, une mortaise radiale 20d d'une section droite rectangulaire correspondant à celle du taquet. Celui-ci 38, dans le mode d'exécution de la figure 13, se présente sous la forme d'un petit parallélépipède rectangle et comporte un trou 38a, le traversant de part en part, et dans lequel est passé l'extrémité libre du tube. La fixation du tube au taquet 38 est obtenue au moyen d'une vis de pression 39.The mandrel 20 has at its end located on the side of the shaft end 20a, a radial mortise 20d of a rectangular cross section corresponding to that of the cleat. This 38, in the embodiment of Figure 13, is in the form of a small rectangular parallelepiped and has a hole 38a, passing right through, and through which the free end of the tube. The tube is fixed to the cleat 38 by means of a pressure screw 39.

Dans le mode d'exécution de la figure 14, le taquet 40,semblable au taquet 38, comporte un trou 40a le traversant de part en part dans lequel est passé le tube et un deuxième trou 40b, perpendiculaire et adjacent au trou 40a et dans lequel trou 40b est passée une vis de serrage 41, vissée dans un trou taraudé 20e pratiqué dans le fond de la mortaise 20d. Sous l'effet du serrage de la vis 41, le taquet est déplacé dans la mortaise 20d, ce qui a pour effet de bloquer le tube entre le taquet 40 et la périphérie du mandrin 20.In the embodiment of FIG. 14, the cleat 40, similar to the cleat 38, has a hole 40a passing right through it through which the tube has passed and a second hole 40b, perpendicular and adjacent to the hole 40a and in which hole 40b has passed a clamping screw 41, screwed into a tapped hole 20e made in the bottom of the mortise 20d. Under the effect of the tightening of the screw 41, the cleat is moved in the mortise 20d, which has the effect of blocking the tube between the cleat 40 and the periphery of the mandrel 20.

Le moto-réducteur est ensuite actionné pour entraîner le mandrin en rotation et le tube, issu de la filière 1, s'enroule autour du mandrin à spires jointives. Le montage libre sur glissière du chariot 30 permet l'enroulement du tube sur la longueur du mandrin 20.The gear motor is then actuated to drive the mandrel in rotation and the tube, coming from the die 1, is wound around the mandrel with contiguous turns. The free mounting on slide of the carriage 30 allows the winding of the tube over the length of the mandrel 20.

Le bloc de filière 1 est maintenu engagé dans le logement 30a, du chariot sous l'effet de la traction exercée sur le tube.The die block 1 is kept engaged in the housing 30a of the carriage under the effect of the traction exerted on the tube.

On se reporte maintenant aux figures 11 et 12 du dessin qui illustrent un mandrin pour réaliser des objets ovales ou elliptiques.Referring now to Figures 11 and 12 of the drawing which illustrate a mandrel for making oval or elliptical objects.

Dans un mandrin cylindrique tel que celui 20 qui vient d'être décrit, aucun problème ne se pose lorsqu'il faut retirer du mandrin le tube enroulé à spires jointives. Si le mandrin est lisse, il suffit de faire glisser le tube enroulé sur le mandrin.In a cylindrical mandrel such as that which has just been described, no problem arises when it is necessary to remove from the mandrel the tube wound with contiguous turns. If the mandrel is smooth, simply slide the coiled tube over the mandrel.

Si le mandrin comporte une gorge hélicoïdale, le retrait du tube est obtenue en "dévissant" l'enroulement de tube.If the mandrel has a helical groove, the withdrawal of the tube is obtained by "unscrewing" the tube winding.

Par contre un problème existe lorsque le mandrin est d'une section droite elliptique ou ovale et que le tube s'enroule dans une gorge du fait que le tube enroulé ne peut être retiré si le mandrin est réalisé en une seule pièce.On the other hand, a problem exists when the mandrel is of an elliptical or oval cross section and the tube is wound in a groove because the wound tube cannot be removed if the mandrel is made in one piece.

Selon l'invention et pour réaliser des enroulements de tube d'un contour ovalisé ou elliptique, le mandrin 42 se compose d'un noyau par exemple cylindrique 42a comportant à une extrémité un bout d'arbre 42b engagé dans un alésage 42c et goupillé au moyen d'une goupille mécanique 43 engagée dans des trous 42d/42e s'étendant diamétralement au noyau 42a et au bout d'arbre 42b. A son autre extrémité, le noyau comporte un logement conique coaxial 42f. Le mandrin comporte encore deux demi-coquilles 421/422 d'un contour externe, par exemple sensiblement demi-elliptique et d'un contour interne sensiblement demi- cylindrique, de manière à s'adapter parfaitement sur le noyau cylindrique 42a. Les deux demi-coquilles sont en opposition de telle sorte que tel que cela est représenté à la figure 12, le mandrin est d'une section droite elliptique. Elles s'étendent sur la quasi longueur du noyau 42a et comportent, à leurs extrémités, des épaulements demi-annulaires d'un contour externe sensiblement demi-circulaires 42a,/42,b -422a/422b. L'assemblage des deux demi-coquilles 42,/422 sur le noyau 42a est réalisé au moyen d'une goupille 44, engagée libre dans un conduit cylindrique 42g, s'étendant diamétralement au noyau 42a et correspondant avec deux trous 42h/42j réservés dans les épaulements annulaires 42,a/42,a. Une bague 45, comportant un premier alésage 45a, d'un diamètre légèrement supérieur au diamètre du noyau 42a et un deuxième alésage concentrique 45b légèrement supérieur au diamètre externe des épaulements 421a/422a, a pour fonction de maintenir à la fois les deux demi-coquilles et de maintenir prisomère la goupille 44.According to the invention and to produce tube windings of an ovalized or elliptical outline, the mandrel 42 consists of a core, for example cylindrical 42a comprising at one end a shaft end 42b engaged in a bore 42c and pinned to the by means of a mechanical pin 43 engaged in holes 42d / 42e extending diametrically to the core 42a and to the end of the shaft 42b. At its other end, the core has a coaxial conical housing 42f. The mandrel also comprises two half-shells 42 1/42 2 an outer contour, for example substantially half-elliptical and an inner outline substantially semi-cylindrical, so as to perfectly fit on the cylindrical core 42a. The two half-shells are in opposition so that, as shown in FIG. 12, the mandrel is of an elliptical cross section. They extend over the quasi-length of the core 42a and comprise, at their ends, semi-annular shoulders with a substantially semicircular external contour 42a, / 42, b -42 2 a / 42 2 b. The assembly of the two half-shells 42, / 42 2 on the core 42a is carried out by means of a pin 44, engaged free in a cylindrical conduit 42g, extending diametrically to the core 42a and corresponding with two holes 42h / 42j reserved in the annular shoulders 42, a / 42, a. A ring 45, comprising a first bore 45a, of a diameter slightly greater than the diameter of the core 42a and a second concentric bore 45b slightly greater than the external diameter of the shoulders 42 1 a / 42 2 a, has the function of maintaining both the two half-shells and maintain the pin 44.

La profondeur de l'alésage 45b est sensiblement égale à la longueur desdites épaulements.The depth of the bore 45b is substantially equal to the length of said shoulders.

Une deuxième bague 46, identique à la bague 45, vient en recouvrement des épaulements 421b/422b. Cette bague 46 comporte un atésage 46a d'un diamètre légèrement supérieur à celui du noyau 42a et un deuxième alésage concentrique 46b, légèrement supérieur au diamètre externe des épaulements 421b/422b.A second ring 46, identical to the ring 45, overlaps the shoulders 42 1 b / 42 2 b. This ring 46 has a atésage 46a of a diameter slightly greater than that of the core 42a and a second concentric bore 46b, slightly larger than the outer diameter of shoulders 42 1b / 42 2 b.

La bague 46 est maintenue en position par une vis de pression 47, vissée dans un trou radial taraudé 46c et venant en appui sur le noyau 42a. De même, la bague 45 est maintenue par une vis 48 vissée dans un trou radial taraudé 45c et venant en appui sur le noyau 42a.The ring 46 is held in position by a pressure screw 47, screwed into a tapped radial hole 46c and coming to bear on the core 42a. Likewise, the ring 45 is held by a screw 48 screwed into a tapped radial hole 45c and bearing on the core 42a.

Les deux demi-coquilles 421/422 sont espacées l'une de l'autre d'une distance d, sensiblement égale à la largeur du tube, par exemple pour un tube cylindrique : son diamètre.The two half-shells 42 1/42 2 are spaced from each other by a distance d, substantially equal to the width of the tube, for example a cylindrical tube: its diameter.

Elles comportent, à leur périphérie, un gorge hélicoïdale 421c/422c dans laquelle s'enroule le tube issu du bloc de filière 1.They include, at their periphery, a helical groove 42 1 c / 42 2 c in which the tube from the die block 1 is wound.

Pour retirer l'enroulement du tube du mandrin 42, on desserre la vis 47 et on fait coulisser la bague 46 sur le noyau jusqu'à dégager les épaulements 42,b/42,b. On desserre ensuite la vis 48 et on fait coulisser l'autre bague 45 pour dégager les épaulements 421a/422a des demi-coquilles et on laisse s'échapper la goupille 44 qui tombe par gravité. On retire le noyau 42a en le faisant coulisser par rapport aux demi-coquilles 421/422. On rapproche ensuite lesdites demi-coquilles jusqu'à ce que leurs bords longitudinaux 42,d/422d viennent au contact l'un de l'autre et on retire l'enroulement de tube.To remove the winding from the tube of the mandrel 42, the screw 47 is loosened and the ring 46 is slid over the core until the shoulders 42, b / 42, b are released. The screw 48 is then loosened and the other ring 45 is slid to release the shoulders 42 1 a / 42 2 has half-shells and the pin 44 which falls by gravity escapes. The ring 42a is removed by sliding it relative to half-shells 42 1/42 2. The said half-shells are then brought closer until their longitudinal edges 42, d / 42 2 d come into contact with one another and the tube winding is removed.

Une des demi-coquilles 42, comporte une mortaise radiale 42,d pour y disposer un des taquets d'entraînement 38/40 décrits en référence aux figures 13 et 14.One of the half-shells 42 comprises a radial mortise 42, d for placing therein one of the drive lugs 38/40 described with reference to FIGS. 13 and 14.

Claims (21)

1. Dispositif de filière pour former du tube à partir d'un ruban métallique (2), caractérisée en ce qu'il comporte un bloc de filière long (1), comportant dans le sens de la longueur et le traversant de part en part, un conduit (1a/11/1q) comportant un orifice d'entrée (1b/1h/1p) de plus grande section et un orifice de sortie (1d/1g/1n) de plus petite section et dont les génératrices convergent de l'orifice d'entrée vers l'orifice de sortie et en ce que le conduit (1 a/1I/1q) est, au droit de l'orifice d'entrée - (1b/1h/1p) d'une largeur légèrement supérieure à celle dudit ruban métallique (2).1. Die device for forming a tube from a metal strip (2), characterized in that it comprises a long die block (1), comprising in the direction of the length and passing through it right through , a duct (1a / 11 / 1q) comprising an inlet orifice (1b / 1h / 1p) of larger section and an outlet orifice (1d / 1g / 1n) of smaller section and whose generators converge from the inlet to the outlet and in that the conduit (1 a / 1I / 1q) is, to the right of the inlet orifice - (1b / 1h / 1p) slightly wider to that of said metallic strip (2). 2. Dispositif de filière selon la revendication 1, caractérisé en ce que ledit bloc (1) est d'une section droite polygonale et en ce que rorifice d'entrée (1b/1h/1p) et l'orifice de sortie (1d/1g/1n) du conduit débouchent sur deux faces planes (1c/1e) parallèles entre elles et perpendiculaires à l'axe longitudinal dudit bloc.2. Die device according to claim 1, characterized in that said block (1) is of a polygonal cross section and in that the inlet orifice (1b / 1h / 1p) and the outlet orifice (1d / 1g / 1n) of the conduit open onto two flat faces (1c / 1e) parallel to each other and perpendicular to the longitudinal axis of said block. 3. Dispositif de filière selon l'une quelconque des revendications 1 et 2, caractérisé en ce que le bloc de filière (1) comporte un aileron de guidage - (1m/1r) s'étendant sur tout ou partie de la longueur du conduit (11/1q) et faisant saillie à l'intérieur de celui-ci, lequel aileron (1m/1r) est parallèle à l'axe longitudinal dudit conduit et a pour fonction de guider les bords retournés du ruban métallique (2) lors du tirage, en vue d'obtenir la jointure desdits bords de façon rectiligne.3. Die device according to any one of claims 1 and 2, characterized in that the die block (1) comprises a guide fin - (1m / 1r) extending over all or part of the length of the conduit (11 / 1q) and projecting inside thereof, which fin (1m / 1r) is parallel to the longitudinal axis of said conduit and has the function of guiding the turned edges of the metal strip (2) during drawing, in order to obtain the joining of said edges in a straight line. 4. Dispositif de filière selon la revendication 3, caractérisé en ce que l'aileron de guidage (1m) prend naissance à la périphérie de l'orifice de sortie du conduit (1g), est d'une hauteur nulle au droit dudit orifice pour aller en progressant à l'intérieur du conduit et en ce que le bord longitudinal (1ml) dudit aileron est sensiblement perpendiculaire à la face 1e du bloc où débouche l'orifice de sortie du conduit.4. Die device according to claim 3, characterized in that the guide fin (1m) originates at the periphery of the outlet outlet of the conduit (1g), is of zero height at the right of said orifice for go progressing inside the duct and in that the longitudinal edge (1 ml) of said fin is substantially perpendicular to the 1st face of the block where the outlet opening of the duct opens. 5. Dispositif de filière selon l'une quelconque des revendications 1 et 2 ou 3 ou 4, caractérisé en ce que le bloc de filière (1) comporte une plaquette de guidage amovible (3), fixée à la face (1c) du bloc où débouche l'orifice d'entrée (1b) du conduit, laquelle plaquette (3) obstrue partiellement ledit orifice et comporte un bord rectiligne (3a) situé sur le côté et à proximité de l'axe longitudinal du conduit (1a) et sur lequel bord s'appuie le ruban métallique (2) cette plaquette (3) ayant pour fonction de guider ledit ruban et de s'opposer à son vrillage lors du tirage, en vue d'obtenir la jointure des bords retournés du ruban de façon rectiligne.5. Die device according to any one of claims 1 and 2 or 3 or 4, characterized in that the die block (1) comprises a removable guide plate (3), fixed to the face (1c) of the block where the inlet opening (1b) of the duct opens, which plate (3) partially obstructs said opening and has a straight edge (3a) located on the side and near the longitudinal axis of the duct (1a) and on which edge is supported by the metallic ribbon (2) this plate (3) having the function of guiding said ribbon and opposing its twisting during drawing, in order to obtain the joining of the turned edges of the ribbon in a rectilinear manner . 6. Dispositif de filière selon l'une quelconque des revendications 1 et 2 ou 3 ou 4, caractérisé en ce que le bloc de filière (1) comporte deux plaquettes de guidage amovibles (3/4) fixées à la face (1c) du bloc où débouche l'orifice d'entrée (1b) du conduit , lesquelles plaquettes (3/4) obstruent quasi totalement ledit orifice et comportent un bord rectiligne (3a/4a) de telle sorte que lesdits bords (3a/4a) sont situés de part et d'autre et à proximité de l'axe longitudinal du conduit (1 a), lesquels bords sont espacés l'un de l'autre d'une distance (d) légèrement supérieure à l'épaisseur du ruban de métal (2), ces deux plaquettes (3/4) ayant pour fonction de guider ledit ruban et de s'opposer à son vrillage lors du tirage en vue d'obtenir la jointure des bords retournés du ruban de façon rectiligne.6. Die device according to any one of claims 1 and 2 or 3 or 4, characterized in that the die block (1) comprises two removable guide plates (3/4) fixed to the face (1c) of the block where the inlet orifice (1b) of the duct opens, which plates (3/4) almost completely obstruct said orifice and have a straight edge (3a / 4a) so that said edges (3a / 4a) are located on either side and close to the longitudinal axis of the conduit (1a), which edges are spaced from each other by a distance (d) slightly greater than the thickness of the metal strip ( 2), these two plates (3/4) having the function of guiding said ribbon and of opposing its twisting during drawing in order to obtain the joining of the turned edges of the ribbon in a rectilinear manner. 7. Dispositif de filière selon l'une quelconque des revendications 5 ou 6, caractérisé en ce qu'au moins une des plaquettes (3) comporte sur son bord rectiligne, une échancrure (3b) située au droit de l'axe longitudinal du contuit (1a) pour permettre le passage d'un fil métallique constituant une âme autour de laquelle s'enroule le ruban métallique (2) lors du tirage pour former le tube.7. Die device according to any one of claims 5 or 6, characterized in that at least one of the plates (3) has on its rectilinear edge, a notch (3b) located in line with the longitudinal axis of the content (1a) to allow the passage of a metal wire constituting a core around which the metal ribbon (2) is wound during drawing to form the tube. 8. Dispositif de filière selon l'une quelconque des revendications 1 à4, caractérisé en ce que le bloc de filière (1) comporte à l'intérieur du conduit (1q) une tige de guidage constituant une âme fixe (6) coaxiale au conduit (1q) et portée par une plaque-support (7) fixée à la partie (1b) du bloc où débouche l'orifice d'entrée (1 p) du conduit et dont l'extrémité libre de ladite âme (6) s'étend légèrement à l'extérieur de l'orifice de sortie (1 n) du conduit et est d'un contour externe parallèle au contour interne dudit orifice (1 n) un espace (e) sensiblement égal à l'épaisseur du ruban métallique (2) étant réservé entre l'âme (6) et l'orifice de sortie (1 n) du conduit.8. Die device according to any one of claims 1 to 4, characterized in that the die block (1) has inside the conduit (1q) a guide rod constituting a fixed core (6) coaxial with the conduit (1q) and carried by a support plate (7) fixed to the part (1b) of the block where the inlet orifice (1 p) of the conduit opens and whose free end of said core (6) s' extends slightly outside the outlet orifice (1 n) of the conduit and is of an external contour parallel to the internal contour of said orifice (1 n) a space (e) substantially equal to the thickness of the metallic strip ( 2) being reserved between the core (6) and the outlet orifice (1 n) of the conduit. 9. Dispositif de filière selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'orifice d'entrée (1b) du conduit (1a) est d'une section droite circulaire dont le diamètre est légèrement supérieur à la largeur du ruban métallique (2).9. Die device according to any one of claims 1 to 8, characterized in that the inlet orifice (1b) of the conduit (1a) is of a circular cross section whose diameter is slightly greater than the width metallic tape (2). 10. Dispositif de filière selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'orifice d'entrée (1h) du conduit est d'unè section droite elliptique dont le grand axe (1h,) est légèrement supérieur à la largeur du ruban métallique (2).10. Die device according to any one of claims 1 to 8, characterized in that the inlet orifice (1h) of the duct is of an elliptical cross section whose major axis (1h,) is slightly greater than the width of the metal strip (2). 11. Dispositif de filière selon l'une quelconque des revendications 1 à 10, caractérisé en ce que l'angle formé par la paroi du conduit (11) et la face (1e) où débouche l'orifice de sortie (1 g) est adouci pour éviter tout arrachement de métal au cours de la traction exercée sur le ruban (2).11. Die device according to any one of claims 1 to 10, characterized in that the angle formed by the wall of the duct (11) and the face (1e) where the outlet orifice opens (1 g) is softened to avoid any metal tearing during the traction exerted on the tape (2). 12. Dispositif de filière selon l'une quelconque des revendications 1 à 11, caractérisé en ce que ledit bloc de filière (1) est monté de façon amovible sur un chariot (30) déplaçable horizontalement devant un mandrin horizontal (20) entraîné en rotation par des moyens moteurs et autour duquel mandrin - (20) s'enroule le tube, issu du bloc de filière (1) sensiblement perpendiculairement à la face du bloc (1 e) où débouche l'orifice de sortie (1d/1g/1n) du conduit, lequel chariot (30) est monté pivotant autour d'un axe horizontal parallèle au mandrin - (20) et comporte des moyens (32/33/34/35/36/37) pour le positionner en inclinaison de telle sorte que le tube issu du bloc. de filière (1) tangente ledit mandrin (20).12. Die device according to any one of claims 1 to 11, characterized in that said die block (1) is removably mounted on a carriage (30) movable horizontally in front of a horizontal mandrel (20) driven in rotation by motor means and around which mandrel - (20) winds the tube, coming from the die block (1) substantially perpendicular to the face of the block (1 e) where the outlet orifice opens (1d / 1g / 1n ) of the conduit, which carriage (30) is pivotally mounted about a horizontal axis parallel to the mandrel - (20) and comprises means (32/33/34/35/36/37) for positioning it in inclination so that than the tube from the block. of die (1) tangent to said mandrel (20). 13. Dispositif de filière selon la revendication 12, comportant un moto-réducteur ou un moto-réducteur-variateur (12) fixé à un socle rectangulaire (11) dont l'arbre de sortie (12a) du réducteur s'étend horizontalement, caractérisé en ce que ledit socle (11) comporte, en face de l'arbre de sortie - (12a) du réducteur, une poupée fixe (17) comportant une pointe (18) coaxiale audit arbre de sortie (12a) du réducteur et en ce que le mandrin - (20) est placé de façon amovible entre ledit réducteur (12) et ladite poupée (17) et est calé en rotation par une de ses extrémités sur l'arbre de sortie (12a) du réducteur et est supporté à son autre extrémité par ladite pointe (18) laquelle est montée déplaçable suivant son axe longitudinal dans un logement horizontal (17a) réservé dans ladite poupée (17, laquelle comporte des moyens - (19) pour immobiliser la pointe (18) en position.13. A die device according to claim 12, comprising a motor-reducer or a motor-reducer-variator (12) fixed to a rectangular base (11) whose output shaft (12a) of the reducer extends horizontally, characterized in that said base (11) comprises, opposite the output shaft - (12a) of the reducer, a fixed headstock (17) comprising a point (18) coaxial with said output shaft (12a) of the reducer and in this that the mandrel - (20) is removably placed between said reduction gear (12) and said headstock (17) and is locked in rotation by one of its ends on the output shaft (12a) of the reduction gear and is supported at its other end by said point (18) which is mounted movable along its longitudinal axis in a horizontal housing (17a) reserved in said headstock (17, which comprises means - (19) for immobilizing the tip (18) in position. 14. Dispositif de filière selon l'une quelconque des revendications 12 et 13, caractérisé en ce que ledit - chariot (30) est porté par un support (28) monté réglable sur ledit socle (11) pour pouvoir être rapproché ou éloigné du mandrin (20) et comportant des moyens (28d/29) pour l'immobiliser en position par rapport au mandrin (20).14. Die device according to any one of claims 12 and 13, characterized in that said - carriage (30) is carried by a support (28) mounted adjustable on said base (11) to be able to be brought closer or away from the mandrel (20) and comprising means (28d / 29) for immobilizing it in position relative to the mandrel (20). 15. Dispositif de filière selon l'une quelconque des revendications 12 à 14, caractérisé en ce que ledit support (28) se compose d'une plaque de base - (28c) et de deux montants d'extrémités (28a/28b) perpendiculaires à ladite plaque (28c) et en ce que le chariot (30)se compose d'une plaque-porte-filière (30a) comportant deux glissières (30b/30c) qui coopèrent avec un ensemble de deux coulisses - (21/22) parallèles entre elles et ancrées dans deux pièces d'extrémités (23/24) ledit ensemble de coulisses (21/22) étant monté pivotant autour de deux arbres horizontaux et coaxiaux (25/26) et portés par lesdits montants d'extrémités (28a/28b) du support (28).15. Die device according to any one of claims 12 to 14, characterized in that said support (28) consists of a base plate - (28c) and two end uprights (28a / 28b) perpendicular to said plate (28c) and in that the carriage (30) consists of a die-carrying plate (30a) comprising two slides (30b / 30c) which cooperate with a set of two slides - (21/22) mutually parallel and anchored in two end pieces (23/24), said set of slides (21/22) being pivotally mounted around two horizontal and coaxial shafts (25/26) and carried by said end posts (28a / 28b) of the support (28). 16. Dispositif de filière selon la revendication 15, caractérisé en ce que ledit ensemble de coulisses - (21/22) porte chariot (30) est monté réglable en hauteur sur les deux montants (28a/28b) du support (28), lesquels montants comportent des trous - (27) répartis sur leur hauteuret susceptibles de recevoir lesdits arbres (25/26) autour desquels pivote ledit ensemble de coulisses (21/22).16. Die device according to claim 15, characterized in that said set of slides - (21/22) carriage holder (30) is mounted adjustable in height on the two uprights (28a / 28b) of the support (28), which uprights have holes - (27) distributed over their height and capable of receiving said shafts (25/26) around which pivots said set of slides (21/22). 17. Dispositif de filière selon l'une quelconque des revendications 12 à 15, caractérisé en ce que les moyens pour positionner en inclinaison le chariot (30) et ledit ensemble de coulisses (21/22) consistent en deux vis-butées (32/33) vissées à l'extrémité de deux pattes supports (34/35) montées pivotantes dans le sens vertical sur l'un ou l'autre desdits montants (28a/28b) du support et immobilisables en position, lesquelles vis-butées - (32/33) sont mises au contact de l'une ou l'autre des pièces d'extrémités (23/24) dans lesquelfes sont ancrées les coulisses (21/22) et de part et d'autre de l'axe de pivotement dudit ensemble de coulisses (21/22).17. A die device according to any one of claims 12 to 15, characterized in that the means for tilting the carriage (30) and said set of slides (21/22) consist of two stop screws (32 / 33) screwed to the end of two support legs (34/35) pivotally mounted vertically on one or the other of said uprights (28a / 28b) of the support and immobilizable in position, which screw-stops - ( 32/33) are brought into contact with one or other of the end pieces (23/24) in which the rails are anchored the slides (21/22) and on either side of the pivot axis of said set of slides (21/22). 18. Dispositif de filière selon l'une quelconque des revendications 12 à 17, caractérisé en ce que le bloc de filière (1) est disposé dans un logement - (30a,) réservé dans le chariot (30), lequel logement est d'une section droite polygonale correspondant à celle dudit bloc de filière (1).18. Die device according to any one of claims 12 to 17, characterized in that the die block (1) is disposed in a housing - (30a,) reserved in the carriage (30), which housing is of a polygonal cross section corresponding to that of said die block (1). 19. Dispositif de filière selon l'une quelconque des revendications 12 à 18, caractérisé en ce que le mandrin (20) comporte à sa périphérie une gorge - (20c) enroulée en hélice à spires jointives et sur la longueur du mandrin, dont la section droite de la gorge (20c) correspond à celle du tube issu de la filière (1).19. A die device according to any one of claims 12 to 18, characterized in that the mandrel (20) has at its periphery a groove - (20c) wound in a helix with contiguous turns and over the length of the mandrel, the cross section of the groove (20c) corresponds to that of the tube from the die (1). 20. Dispositif de filière selon la revendication 19, pour réaliser des objets tubulaires d'un contour elliptique, caractérisé en ce que le mandrin (42) comporte un noyau central (42a) sur lequel sont rapportées deux demi-coquilles (42,/422) d'un contour externe demi-elliptique et des moyens (44/45/46/47) pour assembler les demi-coquilles - (421/422) et le noyau (42a), lesquelles demi-coquilles (421/422) en place sur ledit noyau (42a) sont espacées l'une de l'autre d'une distance (d1) sensiblement égale à la largeur du tube, de telle sorte qu'après l'enlévement du noyau (42a), on puisse dégager du mandrin le tube enroulé en ellipse.20. A die device according to claim 19, for producing tubular objects of an elliptical contour, characterized in that the mandrel (42) has a central core (42a) on which are attached two half-shells (42, / 42 2) of a semi-elliptic outer contour and means (44/45/46/47) for assembling the half-shells - (42 1/42 2) and the core (42a), which half shells (42 1 / 42 2 ) in place on said core (42a) are spaced from each other by a distance (d1) substantially equal to the width of the tube, so that after the removal of the core (42a) , the tube wound in an ellipse can be released from the mandrel. 21. Dispositif de filière selon l'une quelconque des revendications 12 ou 19 ou 20, caractérisé en ce que le mandrin (20/42) comporte à l'une de ses extrémités une mortaise radiale (20d/42,d) débouchant à sa périphérie et destinée à recevoir un taquet (38/40) d'entraînement du tube issu du bloc de filière (1), lequel taquet (38/40) comporte un trou (38a/40a) dans lequel est passé le tube et des moyens (39/41) pour fixer le tube au taquet - (38140).21. Die device according to any one of claims 12 or 19 or 20, characterized in that the mandrel (20/42) comprises at one of its ends a radial mortise (20d / 42, d) opening at its periphery and intended to receive a cleat (38/40) for driving the tube coming from the die block (1), which cleat (38/40) has a hole (38a / 40a) in which the tube and means have passed (39/41) to fix the tube to the cleat - (38140).
EP86430010A 1985-04-17 1986-04-14 Drawing device for forming a tube starting from a metal strip Expired - Lifetime EP0198779B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86430010T ATE64701T1 (en) 1985-04-17 1986-04-14 DRAWING IRON DEVICE FOR FORMING PIPES FROM METAL STRIP.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR8505914A FR2580526A1 (en) 1985-04-17 1985-04-17 DIE DEVICE FOR ROLLING BY FLAT IRON STRETCHING AND OBTAINING A TUBULAR ELEMENT
FR8505914 1985-04-17
CA000512049A CA1299925C (en) 1985-04-17 1986-06-20 Die device for forming tube from a metal band

Publications (3)

Publication Number Publication Date
EP0198779A2 true EP0198779A2 (en) 1986-10-22
EP0198779A3 EP0198779A3 (en) 1987-11-25
EP0198779B1 EP0198779B1 (en) 1991-06-26

Family

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Application Number Title Priority Date Filing Date
EP86430010A Expired - Lifetime EP0198779B1 (en) 1985-04-17 1986-04-14 Drawing device for forming a tube starting from a metal strip

Country Status (10)

Country Link
US (1) US4783981A (en)
EP (1) EP0198779B1 (en)
JP (1) JPS61262422A (en)
AU (1) AU583369B2 (en)
BR (1) BR8601713A (en)
CA (1) CA1299925C (en)
DE (1) DE3679931D1 (en)
ES (1) ES8703096A1 (en)
FR (1) FR2580526A1 (en)
MX (1) MX170508B (en)

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GB2256576B (en) * 1988-11-25 1993-11-17 Acme Jewellry Ltd Jewellery
GB2225925B (en) * 1988-11-25 1993-11-17 Acme Jewellery Ltd Jewellery

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JPH078378B2 (en) * 1989-05-12 1995-02-01 住友金属工業株式会社 Pipe making method
US5728015A (en) * 1996-06-12 1998-03-17 Patton; David L. Basketball goal with expanded rim and drain hole
DE10106195A1 (en) * 2001-02-10 2002-08-14 Nexans France S A Process for the production of longitudinally welded pipes
US6688513B2 (en) 2000-10-20 2004-02-10 Nexans Process for producing longitudinally welded tubes
CN102873119B (en) * 2012-10-22 2014-05-14 江苏华程工业制管股份有限公司 Drawing die for rectangular flat steel tube
RU2547058C1 (en) * 2013-09-30 2015-04-10 Открытое акционерное общество "Электростальский завод тяжелого машиностроения" Device for fabrication of items out of metal plates
US10322368B2 (en) 2016-02-23 2019-06-18 The Boeing Company Centrifugal air separator coil manufacturing tools and methods
GB2560689A (en) * 2016-12-16 2018-09-26 Simpson Strong Tie Co Inc Tool and method for forming a strip of material

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DE597120C (en) * 1934-05-17 F W Cremers Device for the production of pipes from sheet metal strips
DE670145C (en) * 1936-02-11 1939-01-12 Pforzheim Metallschlauch Device for the production of thin-walled pipes with longitudinal seam
US2229149A (en) * 1939-02-13 1941-01-21 Armbrust Chain Company Ornamental chain machine
US3001569A (en) * 1958-04-29 1961-09-26 Flexonics Corp Tube forming tool
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GB2225925B (en) * 1988-11-25 1993-11-17 Acme Jewellery Ltd Jewellery

Also Published As

Publication number Publication date
MX170508B (en) 1993-08-07
US4783981A (en) 1988-11-15
EP0198779B1 (en) 1991-06-26
JPS61262422A (en) 1986-11-20
ES553889A0 (en) 1987-02-16
EP0198779A3 (en) 1987-11-25
AU5597086A (en) 1986-11-06
DE3679931D1 (en) 1991-08-01
AU583369B2 (en) 1989-04-27
FR2580526A1 (en) 1986-10-24
ES8703096A1 (en) 1987-02-16
BR8601713A (en) 1986-12-16
CA1299925C (en) 1992-05-05

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