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WO1989002332A1 - Procede de soudage a l'arc et moyen de soudage longitudinal a l'arc - Google Patents

Procede de soudage a l'arc et moyen de soudage longitudinal a l'arc Download PDF

Info

Publication number
WO1989002332A1
WO1989002332A1 PCT/FI1987/000122 FI8700122W WO8902332A1 WO 1989002332 A1 WO1989002332 A1 WO 1989002332A1 FI 8700122 W FI8700122 W FI 8700122W WO 8902332 A1 WO8902332 A1 WO 8902332A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
arc
welding electrode
electrode
press
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.)
Ceased
Application number
PCT/FI1987/000122
Other languages
English (en)
Inventor
Ensi Kyösti Juhani NIINIVAARA
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.)
GSS GENERAL SEA SAFETY Ltd Oy
Original Assignee
GSS GENERAL SEA SAFETY Ltd Oy
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
Priority to FI861913A priority Critical patent/FI78001C/fi
Application filed by GSS GENERAL SEA SAFETY Ltd Oy filed Critical GSS GENERAL SEA SAFETY Ltd Oy
Priority to PCT/FI1987/000122 priority patent/WO1989002332A1/fr
Priority to FI901309A priority patent/FI901309A0/fi
Priority to EP19870906579 priority patent/EP0383750A1/fr
Priority to KR1019890700876A priority patent/KR890701273A/ko
Publication of WO1989002332A1 publication Critical patent/WO1989002332A1/fr
Priority to NO90901244A priority patent/NO901244L/no
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B23K9/02—Seam welding; Backing means; Inserts
    • 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
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
    • 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
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • B23K9/122—Devices for guiding electrodes, e.g. guide tubes

Definitions

  • Arc welding method and longitudinal arc welding means Arc welding method and longitudinal arc welding means.
  • the present invention relates to the arc welding method according to the introductory part of the claim 1 and to the arc welding means to form one or more uniform long weld seams according to the introductory part of the claim 11.
  • the first object of the present invention is therefore to provide a novel, improved welding method and welding means, by which it is possible to essentially reduce the disadvantages and weaknesses connected with the traditional production of a weld seam, and at the same time to enable the manufacture of a uniform long weld seam or weld seam rows by one welding action without changing the welding electrode.
  • the second essential object of the invention is to provide a welding method and a welding means particularly suitable for underwater conditions.
  • the invention is thus based on the ingenious basic realization, that at least one elongate welding electrode in the welding means, as welding bar or rod, is supported essenitially straightly in the position spaced from the welding object and register with it, and that each welding electrode is forced fro this position gradually and/or continuously the end part ahead move towards the welding object to form at least one uniform w seam.
  • FIG. 1 shows a longitudinal cross section of the welding means according to one advantageous embodiment of the invention
  • FIG. 1 shows a sectional view taken along the line II-II of Fig. 1;
  • FIG. 3 shows a sectional view taken along the line III-III Fig. I;
  • FIG. 4 shows a longitudinal cross section of the welding means according to a second advantageous embodiment of the invention
  • FIG. 5 shows a longitudinal cross section of the welding means accroding to a third advantageous embodiment of the invention.
  • FIG. 6 shows a sectional view taken along the line VI-VI of Fig. 5;
  • FIG. 7 shows a longitudinal cross section of the welding means according to a fourth advantageous embodiment of the invention.
  • FIG. 8 shows a perspective view of a fifth advantageous embodiment of the invention.
  • the arc welding means comprises a mantle type shell portion 1 made of at least partly flexible material and supporting the welding means and being open at one long side thereof.
  • fixing means 2 e.g. magnet pieces, bands etc.
  • the size or shape of the welding object itself impose no limitation concerning the invention; the object can be for example a V-channel between two metal plates, a rupture in the metal plate or the like.
  • the arc welding means includes also an elongate welding electrode 4, advan;tageously a welding bar or rod, extending to the whole length of the welding means and suspended inside the shell portion 1, so that when the welding means has been adapted to the welding object 3, the welding electrode is parallel with the welding object, i.e. the welding seam to be formed, and in register with it.
  • the shell portion 1 from a non conductive flexible material, for instance polyamide material, whereby the setting of the welding means, especially the one provided with a flexible core wire, to any twisted or angular welding object can easily be done.
  • a non conductive flexible material for instance polyamide material
  • the weld seam is formed according to the basic principle of the invention to the welding object 3 in such a way, that the end part 41 of the welding electrode 4, which before commencing the welding process has been supported along the whole length thereof at a distance from the welding object 3, is bent and laterally oriented by an angle, which advantageously is between 5°...50°, towards the welding object 3, whereas only the end part 41 forced to the immediate proximity of the welding object 3, is located at a distance from the welding object 3, which enables the appearance of the electric arc.
  • the welding electrode 4 is bent further on to form the weld seam from the position apart from the welding object 3 gradually the free end ahead to the welding object 3.
  • a press arrangement 5 fastened inside the shell portion 1 to the internal top wall 11 and thus placed between the shell portion 1 and the welding electrode 4, is used in the welding means.
  • the press arrangement 5 comprises a series of press means 51 arranged one after another and supporting the welding electrode, each of whi means 51 has a spring means 52 and a retainer means 53.
  • the retainer means 53 keeps the spring means 52 and thereby the whole press means 51 compressed.
  • the retainer means 53 can one at a time and alternate be transformed as non-retaining, whereby the spring means 52 is released from the compressed condition, so that it presses the end part 41 of the welding electrode down to the welding object 3. Then the welding electrode 4 is pressed with the free end 41 ahead to the arc area by the press arrangement 5 provided with the spring means 52 in several subsequent phases following each other.
  • the retainer means 53 fastened by its ends between the shell portion 1 and the press means 51 of the welding electrode 4, as non-retaining, it is shaped as a flanged pin made of a material yielding by thermal influence, preferably plastic, and provided with an internal electric resistance 54, by which the retainer means 53 can be heated up, whereby the retainer means 53 is softened and yields under the load directed to it by the spring means 52. Then the spring means, when it is released from the compressed condition, forces the welding electrode 4 to bend to the welding object 3. As is more clearly visible in the figure 3, the activating means for the electrical resistance are also connected with the push button press arrangement 5 according to this embodiment.
  • These activating means comprise advantageously several current switches 9 located close to the edges of the open side of the shell portion 1, whereat these switches 9 when contacted with the press means 51 transferred towards the welding object 3, shut off the circuit flowing through the electrical resistance element 54 of the other press means 51 next in order, which heats up the electrical resistance element 54 and softens the retainer means, generating in this way a continuous welding process, in which the welding electrode 4 is serially bent to the welding object 3.
  • a press arrangement 5 is used in the welding means, adapted to be transferable inside the shell portion 1 between the inner top wall 11 of the shell portion an the welding electrode 4.
  • the welding electrode 4 is gradually a continuously bent to the welding object 3 mechanically by an advantageously ball-type (as in figure 4) or wedge-type press piece 57 formed by the press arrangement, which piece 57 is transfered as supported to the welding electrode 4 and, in orde to maintain an even electric arc, by the speed corresponding the progress rate of the arc.
  • the welding current can be conducted for instance from a current rail extending to the whole length of the welding means to the welding electrode 4 by the conductive, advantageously metal press piece 57 of the press arrangement, whereby the conduction path of electricity to the welding electrode 4 will always be as short as possible.
  • the welding electrode 4 coupled to the welding current supply is bent from a position spaced from the welding object continuously and gradually to the welding object by a press arrangement comprising a hollow means 56, most advantageously an elastic tube, for liquid medium flow, and an advantageously wedge-shaped expanding press piece 57 adapted onto the hollow means 56, the guiding surface of which, being diagonally curved towards the welding object, is supported against the welding electrode 4.
  • the medium flow taking place in the tube expands the tube at least in the transversal direction in relation to the length of the welding electrode 4, whereby the expansion caused by the medium flow in the tube 56 forces the press piece 57 to move ahead thereof along the tube 56.
  • FIG 5 an alternative or complementary solution to transfer the press piece 57 along the tube 56 has been illustrated by a dashed line.
  • an expansion piece 58 can be inserted in the tube to progress in the tube ahead the medium flow and to move thus the press piece 57.
  • rail shaped guide projections 10 extend to the whole length of the shell portion to determine the course of the press piece 57.
  • a support piece 8 clamped to the side walls of the shell portion 1 inside thereof in the immediate proximity of its top wall 11 supports the welding electrode 4 and the elastic tube 56 above it.
  • the support piece 8 has been made by elastic plastic material, so that when the load generated by the expansion of the elastic tube and directed towards the welding object is applied to it, the skirts supporting the welding electrode
  • the welding electrode coupled to the welding current supply by the press arrangement 5 is bent continuously and gradually from the position spaced from the welding object a slanting position the end part 41 ahead to the welding object by the above mentioned press arrangement in such a way, that th needed bending is achieved only by increasing the dimensions of the hollow means 56 belonging to the press arrangement 5 in the transversal direction in relation to the length of the welding electrode 4.
  • the press arrangement 5 according to the fourth advantageous embodiment (figure 7) of the invention consists of a channel element made of conductive material, connected to the current supply and conductively coupled- to the welding electrode 4.To o channel of the channel element, i.e.
  • the upper channel connected with the top wall 11 of the shell portion has been adapted a conductor cable, and the side walls 59 defining the other channel of the channel element, i.e. the lower channe connected with the welding electrode 4, have been made as yielding in the transversal direction in rela;tion to the lengt of the welding electrode 4.
  • Yielding of the side walls has in this embodiment realized so, that the side walls 59 are made of alloyed metal, whereby by stretching the side walls 59 the welding electrode is forced to bend the end part 41 ahead towar the welding object 3.
  • the press piece 57 is moved in the channel defined by these walls, the dimensions of the press piece 57 being at least in the transversal direction relation to the length of the welding electrode greater than th corresponding inner diameter of the unstretched channel.
  • ⁇ - ⁇ moving the press piece 57 in the channel most advantageous / wi a speed exactly corresponding the progress rate of the arc, the welding electrode 4 is bent according to the stretch of the sid walls and its end part 41 is directed in a slanting position to the welding object 3.
  • FIG 8 has been shown the operational principle of the welding means according to the fifth advantagous embodiment of the invention and the feeding of the welding current to the welding electrode 4 has been realized in the same way as shown above in connection with the fourth advantageous embodiment of the invention.
  • the press arrangement 5 comprises thus a conductive, advantagously metal channel element, having a first channel 6 to conduct the welding current and a second channel, whose side walls 59 are yielding.
  • the difference compared with the fourth advantageous embodiment of the invention is that the channel, lower in the figure connected with the welding electrode, is full of medium 7 expanding under heat. Then this heat-expandable medium 7 stretches the side walls 59 and thus bends the welding electrode in order to direct the end part 41 thereof diagonally to the welding object 3.
  • the way, by which the welding current is conducted to the press arrangement, is not the most essential factor considering the operation of the invention.
  • the welding current can be conducted in the most simple way so, that a conductor cable has been adapted into the upper channel 6, or this channel is fille by conductive medium, e.g. mercury.
  • the current feeding effecte by the press arrangement includes the advantage, that the conduction path of the current is always as short as possbile, which tends to stabilize the generated electric arc and thus to improve the quality of the weld seam produced.
  • the arc welding means is advantagous to fill the interior of the shell portion 1 by an organic pastelike additive.
  • the additives described in the Finnish Patents Nos. 64903 and 72906 are suitable, by which it is possible to prevent the penetration of water to the arc area and thus obstruct the direct contact between the welding electrode and water, and which being under the influence of the electric arc form over the weld seam a slag layer with great heat capacity, delaying thus cooling of the weld seam and preventing the appearance of welding errors, as edge wounds, slag inclusions etc.
  • a welding rod is used as the welding electrode with an outside coating, it is preferable, that the coating is prepared so, that it does not absorb water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Metal Extraction Processes (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Resistance Welding (AREA)

Abstract

Procédé de soudage à l'arc et moyen allongé de soudage à l'arc permettant de réaliser un long cordon de soudure ou une colonne de cordons de soudure. Selon l'invention, au moins une électrode de soudage allongée (14) située dans le moyen de soudage, telle qu'une barre ou tige de soudage, est supportée dans une position espacée de l'objet de soudage (3) et repérée point par point avec celui-ci de manière virtuellement droite, dans une partie d'enveloppe (1) au moins partiellement souple, moyennant quoi le moyen de soudage est supporté et appliqué sur l'objet de soudage (3). Afin de maintenir un arc électrique régulier et continu, et de réaliser un cordon de soudure uniforme, on pousse chaque électrode de soudage à partir de la position espacée de l'objet de soudage (3) graduellement et/ou en continu, la partie terminale (41) en avant dans un angle oblique avantageusement compris entre 5° et 50°, jusqu'à l'objet de soudure (3).
PCT/FI1987/000122 1987-09-16 1987-09-16 Procede de soudage a l'arc et moyen de soudage longitudinal a l'arc Ceased WO1989002332A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FI861913A FI78001C (fi) 1987-09-16 1986-05-07 Svetsningsanordningarrangemang.
PCT/FI1987/000122 WO1989002332A1 (fr) 1987-09-16 1987-09-16 Procede de soudage a l'arc et moyen de soudage longitudinal a l'arc
FI901309A FI901309A0 (fi) 1987-09-16 1987-09-16 Baogsvetningsfoerfarande och ett laongartat baogsvetningsmedel.
EP19870906579 EP0383750A1 (fr) 1987-09-16 1987-09-16 Procede de soudage a l'arc et moyen de soudage longitudinal a l'arc
KR1019890700876A KR890701273A (ko) 1987-09-16 1987-09-16 아아크 용접방법 및 길이방향 아아크 용접장치
NO90901244A NO901244L (no) 1987-09-16 1990-03-16 Buesveisemetode og sveiseorgan for langsgaaende sveiser.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI1987/000122 WO1989002332A1 (fr) 1987-09-16 1987-09-16 Procede de soudage a l'arc et moyen de soudage longitudinal a l'arc

Publications (1)

Publication Number Publication Date
WO1989002332A1 true WO1989002332A1 (fr) 1989-03-23

Family

ID=8556427

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1987/000122 Ceased WO1989002332A1 (fr) 1987-09-16 1987-09-16 Procede de soudage a l'arc et moyen de soudage longitudinal a l'arc

Country Status (5)

Country Link
EP (1) EP0383750A1 (fr)
KR (1) KR890701273A (fr)
FI (1) FI78001C (fr)
NO (1) NO901244L (fr)
WO (1) WO1989002332A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103962685A (zh) * 2014-04-28 2014-08-06 天津大学 水下焊条半干式仰焊方法
CN111907069A (zh) * 2020-07-21 2020-11-10 大连理工大学 热塑性材料的机器人辅助连续电阻焊接装备及焊接方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE906839C (de) * 1942-03-28 1954-03-18 Versuchsanstalt Fuer Luftfahrt Anordnung zur Herstellung von Schweissverbindungen durch elektrischen Lichtbogen
US3594542A (en) * 1969-07-11 1971-07-20 Sumikin Welding Electrode Co Continuous lay down arc welding method
US3941974A (en) * 1972-05-20 1976-03-02 Kobe Steel Ltd. Arc welding process
DE2820246A1 (de) * 1977-05-09 1978-11-16 Cooper Ind Inc Einrichtung zum zufuehren von schweissmaterial zu einer sich laengs eines vorbestimmten schweisspfades erstreckenden schweisstelle
WO1983003787A1 (fr) * 1982-04-26 1983-11-10 Osmo Asonen Procede et agencement de soudure a l'arc sous l'eau

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE906839C (de) * 1942-03-28 1954-03-18 Versuchsanstalt Fuer Luftfahrt Anordnung zur Herstellung von Schweissverbindungen durch elektrischen Lichtbogen
US3594542A (en) * 1969-07-11 1971-07-20 Sumikin Welding Electrode Co Continuous lay down arc welding method
US3941974A (en) * 1972-05-20 1976-03-02 Kobe Steel Ltd. Arc welding process
DE2820246A1 (de) * 1977-05-09 1978-11-16 Cooper Ind Inc Einrichtung zum zufuehren von schweissmaterial zu einer sich laengs eines vorbestimmten schweisspfades erstreckenden schweisstelle
WO1983003787A1 (fr) * 1982-04-26 1983-11-10 Osmo Asonen Procede et agencement de soudure a l'arc sous l'eau

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103962685A (zh) * 2014-04-28 2014-08-06 天津大学 水下焊条半干式仰焊方法
CN103962685B (zh) * 2014-04-28 2016-05-18 天津大学 水下焊条半干式仰焊方法
CN111907069A (zh) * 2020-07-21 2020-11-10 大连理工大学 热塑性材料的机器人辅助连续电阻焊接装备及焊接方法
CN111907069B (zh) * 2020-07-21 2023-05-12 大连理工大学 热塑性材料的机器人辅助连续电阻焊接装备及焊接方法

Also Published As

Publication number Publication date
EP0383750A1 (fr) 1990-08-29
FI78001C (fi) 1989-06-12
FI78001B (fi) 1989-02-28
NO901244D0 (no) 1990-03-16
FI861913L (fi) 1987-11-08
FI861913A0 (fi) 1986-05-07
NO901244L (no) 1990-05-14
KR890701273A (ko) 1989-12-19

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