FR2861614A1 - Sleeve for a coaxial welding cable with surface undulations for improved flexibility to facilitate manipulation during long duration welding operations - Google Patents

Sleeve for a coaxial welding cable with surface undulations for improved flexibility to facilitate manipulation during long duration welding operations Download PDF

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Publication number
FR2861614A1
FR2861614A1 FR0350769A FR0350769A FR2861614A1 FR 2861614 A1 FR2861614 A1 FR 2861614A1 FR 0350769 A FR0350769 A FR 0350769A FR 0350769 A FR0350769 A FR 0350769A FR 2861614 A1 FR2861614 A1 FR 2861614A1
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welding
sheath
cable
coaxial
sleeve
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FR2861614B1 (en
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TORCHE SERVICE
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TORCHE SERVICE
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/184—Sheaths comprising grooves, ribs or other projections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/32—Accessories
    • B23K9/323—Combined coupling means, e.g. gas, electricity, water or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/32—Accessories
    • B23K9/325—Devices for supplying or evacuating shielding gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/001—Power supply cables for the electrodes of electric-welding apparatus or electric-arc furnaces

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Insulated Conductors (AREA)

Abstract

A sleeve (10, 20) for a Metal Inert Gas - Metal Argon Gas (MIG-MAG) welding coaxial cable (1), destined to receive in its central part some means for the transport of the welding current (5), of the protective welding gas (4), of the welding wire (2, 3) and of the control signal from the trigger (6), has some undulations (11, 12) at least on a part of its external surface. The undulations may be in the form of annular waves or may have a helicoidal structure (both claimed). An independent claim is also included for a coaxial welding cable provided with this sleeve.

Description

DESCRIPTIONDESCRIPTION

L'invention concerne une gaine pour câble coaxial de soudage, par exemple de type Mig-Mag, destinée à recevoir dans sa partie centrale des moyens pour le transport du courant de soudage, du gaz de protection de soudage, du fil de soudage et du signal de commande de la gâchette.  The invention relates to a sheath for a coaxial welding cable, for example of the Mig-Mag type, intended to receive in its central part means for transporting the welding current, the welding protection gas, the welding wire and the welding wire. Trigger control signal.

De tels câbles sont connus. Du fait que le câble transporte aussi bien le courant de soudage que les gaz de protection ainsi que le fil de soudage et le signal pour le démarrage du soudage, ces câbles coaxiaux ont des diamètres très importants leur conférant une grande rigidité ce qui rend leur manipulation très pénible, notamment lors d'une utilisation de longue durée ou des utilisations quotidiennes, ce qui est pourtant très courant.  Such cables are known. Since the cable carries both the welding current and the shielding gases as well as the welding wire and the signal for starting the welding, these coaxial cables have very large diameters giving them great rigidity which makes their handling very painful, especially during long-term use or daily use, which is very common.

On connaît du document FR 77 12864 A un câble électrique souple à isolant ondulé solidaire de l'âme conductrice, ces ondulations augmentant la souplesse du câble. II est à noter qu'il s'agit dans ce document d'un câble électrique souple, la souplesse de l'âme conductrice étant obtenue en associant des brins élémentaires de faible diamètre, souvent inférieurs au millimètre et pouvant descendre jusqu'au dixième de millimètre et non pas d'un câble coaxial de soudage de type Mig-Mag présentant un diamètre de plusieurs centimètres.  Document FR 77 12864 A discloses a flexible electrical cable with corrugated insulation integral with the conductive core, these corrugations increasing the flexibility of the cable. It should be noted that it is in this document a flexible electrical cable, the flexibility of the conductive core being obtained by combining elementary strands of small diameter, often less than a millimeter and can go down to one tenth of millimeter and not a coaxial welding cable type Mig-Mag with a diameter of several centimeters.

Le document DE 84 26 279 U1 décrit un connecteur flexible pour des robots avec une spirale en acier placée à l'intérieur de la paroi du connecteur, cette spirale conférant une grande stabilité empêchant la compression du connecteur et augmentant la résistance à la traction du connecteur. La spirale en acier donne au connecteur un contour en spirale. Les auteurs précisent qu'il est essentiel que ce connecteur souple possède un coeur en caoutchouc qui appuie contre la paroi les conduites contenues dans le connecteur. Une telle réalisation n'est pas possible dans le cas des câbles coaxiaux de soudage de type Mig-Mag.  DE 84 26 279 U1 discloses a flexible connector for robots with a steel spiral placed inside the wall of the connector, this spiral conferring a great stability preventing compression of the connector and increasing the tensile strength of the connector . The steel spiral gives the connector a spiral outline. The authors specify that it is essential that this flexible connector has a rubber core that presses against the wall lines contained in the connector. Such an embodiment is not possible in the case of coaxial welding cables Mig-Mag type.

L'objectif de l'invention est donc de créer une gaine pour câble coaxial de soudage de type Mig-Mag qui rende le câble plus souple que les câbles connus afin de faciliter sa manipulation, notamment pour des utilisations de longue durée.  The object of the invention is therefore to create a sheath for coaxial welding cable type Mig-Mag that makes the cable more flexible than known cables to facilitate its handling, especially for long-term uses.

Cet objectif est atteint selon l'invention par le fait que la gaine présente des ondulations 35 au moins sur une partie de sa surface externe.  This object is achieved according to the invention in that the sheath has corrugations 35 at least on part of its outer surface.

Lors de la réalisation de l'invention, il a été constaté contre toute attente qu'une ondulation présente à la surface externe de la gaine d'un câble raide comme le sont les câbles coaxiaux de soudage de type Mig-Mag augmente la souplesse de celui-ci. La manipulation du câble coaxial de l'invention présentant des ondulations sur sa surface est beaucoup plus facile et moins fatigante que celle des câbles coaxiaux courants avec un isolant lisse. Les ondulations seront réalisées surtout à l'extrémité de la gaine proche de la poignée, autrement dit, là où l'on a le plus besoin de souplesse.  When carrying out the invention, it has been unexpectedly found that a corrugation present on the outer surface of the sheath of a stiff cable as are the coaxial welding cables of the Mig-Mag type increases the flexibility of this one. The manipulation of the coaxial cable of the invention having undulations on its surface is much easier and less tiring than that of common coaxial cables with a smooth insulator. The undulations will be made especially at the end of the sheath close to the handle, in other words, where it is most needed flexibility.

o Dans une variante de l'invention, les ondulations sont formées de vagues annulaires. Les anneaux ainsi formés sont donc coaxiaux à l'axe du câble et la distance séparant deux anneaux successifs ainsi que leur épaisseur peuvent varier, notamment en fonction du diamètre du câble.  In a variant of the invention, the corrugations are formed of annular waves. The rings thus formed are therefore coaxial with the axis of the cable and the distance separating two successive rings and their thickness can vary, in particular as a function of the diameter of the cable.

Dans une autre variante de l'invention, les ondulations ont une structure hélicoïdale. Il s'agit d'une structure hélicoïdale dont le pas et l'épaisseur de la spirale peuvent également varier, notamment en fonction du diamètre du câble.  In another variant of the invention, the corrugations have a helical structure. It is a helical structure whose pitch and thickness of the spiral can also vary, in particular as a function of the diameter of the cable.

Dans un mode de réalisation privilégié de l'invention, l'épaisseur de la gaine reste sensiblement constante au moins dans la partie présentant des ondulations. La face intérieure de la gaine ne touche donc les moyens pour le transport du courant de soudage, du gaz de protection de soudage, du fil de soudage et du signal de commande de la gâchette que dans les parties correspondant aux creux des ondulations. Cela suffit à assurer la tenue du faisceau de câbles et de gaines constituant le noyau du câble coaxial. Les parties correspondant aux sommets des ondulations ne touchent pas le noyau du câble, et assurent la souplesse du câble.  In a preferred embodiment of the invention, the thickness of the sheath remains substantially constant at least in the portion having corrugations. The inner face of the sheath therefore affects the means for transporting the welding current, the welding protection gas, the welding wire and the trigger control signal only in the portions corresponding to the hollows of the undulations. This is sufficient to ensure the holding of the bundle of cables and sheaths constituting the core of the coaxial cable. The portions corresponding to the peaks of the corrugations do not touch the core of the cable, and ensure the flexibility of the cable.

L'invention concerne également un câble coaxial de soudage de type MigMag muni des moyens pour le transport du courant de soudage, du gaz de protection de soudage, du fil de soudage et du signal de commande de la gâchette présentant une gaine conforme à l'invention.  The invention also relates to a MigMag coaxial welding cable provided with means for transporting the welding current, the welding protection gas, the welding wire and the trigger control signal having a sheath according to the invention. invention.

Dans la partie suivante, des exemples d'exécution de l'invention sont décrits à l'aide de dessins, parmi lesquels la figure 1 montre une vue en coupe d'un câble coaxial de soudage de type Mig-Mag la figure 2 montre en coupe longitudinale une gaine pour câble coaxial selon l'invention, la gaine ayant une structure interne et externe annulaire, la figure 3 montre en coupe longitudinale une gaine pour câble coaxial selon l'invention, la gaine ayant une structure interne et externe hélicoïdale, la figure 4 montre en coupe longitudinale une gaine pour câble coaxial selon l'invention, la gaine ayant une structure extérieure annulaire, la figure 5 montre en coupe longitudinale une gaine pour câble coaxial selon o l'invention, la gaine ayant une structure extérieure hélicoïdale.  In the following part, examples of embodiment of the invention are described with the aid of drawings, among which FIG. 1 shows a sectional view of a coaxial welding cable of the Mig-Mag type. FIG. longitudinal section of a sheath for a coaxial cable according to the invention, the sheath having an annular internal and external structure, FIG. 3 shows in longitudinal section a sheath for a coaxial cable according to the invention, the sheath having an internal and external helical structure, the FIG. 4 shows in longitudinal section a sheath for a coaxial cable according to the invention, the sheath having an annular outer structure, FIG. 5 shows in longitudinal section a sheath for a coaxial cable according to the invention, the sheath having a helical outer structure.

Un câble coaxial (1) pour soudage de type Mig-Mag est en général constitué d'une gaine guide-fil (2) dans laquelle circule le fil de soudage (3). Cette gaine guide-fil (2) est elle-même introduite dans une gaine intérieure (4) dans laquelle circule le gaz. Autour de la gaine intérieure (4) est disposée une pluralité de fils disposés sous formes de faisceaux (5) non isolés les uns des autres et destinés à faire passer le courant de soudage. Passent également deux ou trois câbles électriques (6) , isolés les uns des autres et des fils pour le courant de soudage, ces deux ou trois câbles électriques (6) étant destinés au courant de commande de la gâchette.  A coaxial cable (1) for Mig-Mag type welding generally consists of a wire guide sheath (2) in which the welding wire (3) circulates. This wire guide sheath (2) is itself introduced into an inner sheath (4) in which the gas flows. Around the inner sheath (4) is arranged a plurality of son arranged in the form of beams (5) not isolated from each other and intended to pass the welding current. Also pass two or three electric cables (6), insulated from each other and wires for the welding current, these two or three electric cables (6) being intended for the control current of the trigger.

Enfin, le câble coaxial est isolé au moyen d'une gaine extérieure (10, 20) faisant l'objet de l'invention.  Finally, the coaxial cable is isolated by means of an outer sheath (10, 20) which is the subject of the invention.

La gaine isolante conforme à l'invention présente sur sa face externe des ondulations qui se traduisent, en coupe longitudinale, par une succession de creux (11, 21) et de protubérances (12, 22). Ces protubérances (12, 22) peuvent former sur la surface externe de la gaine (10, 20) des anneaux comme sur les figures 2 et 4 ou une structure hélicoïdale comme sur les figures 3 et 5. Ces différentes structures sont indiquées en pointillées sur les figures 2 et 3.  The insulating sheath according to the invention has on its outer face corrugations which result, in longitudinal section, by a succession of recesses (11, 21) and protuberances (12, 22). These protuberances (12, 22) can form on the outer surface of the sheath (10, 20) rings as in Figures 2 and 4 or a helical structure as in Figures 3 and 5. These different structures are indicated in dotted lines on Figures 2 and 3.

Dans un mode de réalisation privilégié de l'invention, l'épaisseur de la gaine (10) reste sensiblement constante au moins dans sa partie ondulée. Les figures 2 et 3 montrent deux exemples conformes à ce mode de réalisation. La surface intérieure (13) de la gaine présente donc pratiquement la même géométrie que la surface extérieure (14). La gaine (10) n'entre donc en contact avec les fils de soudage qu'au niveau des parties correspondant aux creux (11) des ondulations. Ces points de contact successifs suffisent à assurer la tenue des différents composants du câble coaxial. Les parties correspondant aux protubérances (12) des ondulations assurent quant à elles la souplesse du câble coaxial (1).  In a preferred embodiment of the invention, the thickness of the sheath (10) remains substantially constant at least in its corrugated portion. Figures 2 and 3 show two examples according to this embodiment. The inner surface (13) of the sheath thus has substantially the same geometry as the outer surface (14). The sheath (10) thus comes into contact with the welding wires only at the portions corresponding to the hollows (11) of the corrugations. These successive contact points are sufficient to ensure the strength of the various components of the coaxial cable. The portions corresponding to the protuberances (12) of the corrugations ensure the flexibility of the coaxial cable (1).

Pour réaliser une telle gaine (10), il suffit par exemple de prendre une gaine cylindrique connue, de la mettre dans un moule et d'appliquer de la vapeur. Un traitement postérieur pourra être réalisé pour rendre à cette partie de la gaine ses qualités d'origine. On pourra ainsi obtenir une gaine qui soit cylindrique (15) du côté du poste de soudage et munie d'ondulations du côté de la poignée.  To achieve such a sheath (10), it is sufficient for example to take a known cylindrical sheath, put it in a mold and apply steam. A subsequent treatment can be made to return to this part of the sheath its original qualities. It will thus be possible to obtain a sheath which is cylindrical (15) on the side of the welding station and provided with corrugations on the side of the handle.

Dans un autre mode de réalisation de l'invention montré aux figures 4 et 5, seule la face extérieure de la gaine (20) est munie d'ondulations formant des creux (21) et des protubérances (22).  In another embodiment of the invention shown in Figures 4 and 5, only the outer face of the sheath (20) is provided with corrugations forming recesses (21) and protuberances (22).

Claims (5)

Revendicationsclaims 1. Gaine (10, 20) pour câble coaxial (1) de soudage de type Mig-Mag, destinée à recevoir dans sa partie centrale des moyens pour le transport du courant de soudage (5), du gaz de protection de soudage (4), du fil de soudage (2, 3) et du signal de commande de la gâchette (6), caractérisé en ce que la gaine (10, 20) présente des ondulations (11, 12, 21, 22) au moins sur une partie de sa surface externe.  1. Sheath (10, 20) for a Mig-Mag type coaxial cable (1) for receiving, in its central part, means for transporting the welding current (5), welding protection gas (4) ), the welding wire (2, 3) and the trigger control signal (6), characterized in that the sheath (10, 20) has undulations (11, 12, 21, 22) at least on a part of its external surface. 2. Gaine (10, 20) selon la revendication 1, caractérisé en ce que les ondulations (11, 12, 21, 22) sont formées de vagues annulaires.  2. Sheath (10, 20) according to claim 1, characterized in that the corrugations (11, 12, 21, 22) are formed of annular waves. 3. Gaine (10, 20) selon la revendication 1, caractérisé en ce que les ondulations (11, 12, 21, 22) ont une structure hélicoïdale.  3. Sheath (10, 20) according to claim 1, characterized in that the corrugations (11, 12, 21, 22) have a helical structure. 4. Gaine (10) selon l'une des revendications précédentes, caractérisé en ce que l'épaisseur de la gaine (10) reste sensiblement constante au moins dans la partie présentant des ondulations (11, 12).  4. Sheath (10) according to one of the preceding claims, characterized in that the thickness of the sheath (10) remains substantially constant at least in the portion having corrugations (11, 12). 5. Câble coaxial (1) de soudage de type Mig-Mag muni des moyens pour le transport du courant de soudage (5), du gaz de protection de soudage (4), du fil de soudage (2, 3) et du signal de commande de la gâchette (6) caractérisé en ce que en qu'il est muni d'une gaine selon l'une des revendications 1 à 4.  5. Welding coaxial cable (1) of the Mig-Mag type provided with means for transporting the welding current (5), the welding protection gas (4), the welding wire (2, 3) and the signal Trigger control device (6) characterized in that it is provided with a sheath according to one of Claims 1 to 4.
FR0350769A 2003-11-02 2003-11-02 SHEATH FOR COAXIAL WELDING CABLE Expired - Fee Related FR2861614B1 (en)

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FR0350769A FR2861614B1 (en) 2003-11-02 2003-11-02 SHEATH FOR COAXIAL WELDING CABLE

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FR2861614B1 FR2861614B1 (en) 2006-02-24

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH278388A (en) * 1950-04-12 1951-10-15 Zanoni Fritz Device on electrical cables.
US3992565A (en) * 1975-07-07 1976-11-16 Belden Corporation Composite welding cable having gas ducts and switch wires therein
US4057705A (en) * 1973-11-02 1977-11-08 Caterpillar Tractor Co. Fume extracting welding gun
FR2388382A1 (en) * 1977-04-21 1978-11-17 Precicable FLEXIBLE ELECTRIC CABLES WITH CORRUGATED INSULATION AND MANUFACTURING PROCESS
US4487660A (en) * 1980-10-31 1984-12-11 Electric Power Research Institute Multiple wall structure for flexible cable using tubular and spiral corrugations
US4496823A (en) * 1982-11-22 1985-01-29 Bob Mann & Associates Incorporated Multiple passage conduit for fume extracting welding gun
EP0502421A2 (en) * 1991-03-05 1992-09-09 Gimota Ag Smoke suction device for a welding torch

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH278388A (en) * 1950-04-12 1951-10-15 Zanoni Fritz Device on electrical cables.
US4057705A (en) * 1973-11-02 1977-11-08 Caterpillar Tractor Co. Fume extracting welding gun
US3992565A (en) * 1975-07-07 1976-11-16 Belden Corporation Composite welding cable having gas ducts and switch wires therein
FR2388382A1 (en) * 1977-04-21 1978-11-17 Precicable FLEXIBLE ELECTRIC CABLES WITH CORRUGATED INSULATION AND MANUFACTURING PROCESS
US4487660A (en) * 1980-10-31 1984-12-11 Electric Power Research Institute Multiple wall structure for flexible cable using tubular and spiral corrugations
US4496823A (en) * 1982-11-22 1985-01-29 Bob Mann & Associates Incorporated Multiple passage conduit for fume extracting welding gun
EP0502421A2 (en) * 1991-03-05 1992-09-09 Gimota Ag Smoke suction device for a welding torch

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