WO1985002801A1 - Procede de soudage sous l'eau - Google Patents

Procede de soudage sous l'eau Download PDF

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Publication number
WO1985002801A1
WO1985002801A1 PCT/FI1984/000101 FI8400101W WO8502801A1 WO 1985002801 A1 WO1985002801 A1 WO 1985002801A1 FI 8400101 W FI8400101 W FI 8400101W WO 8502801 A1 WO8502801 A1 WO 8502801A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
chamber
fat
sealing
insulating material
Prior art date
Application number
PCT/FI1984/000101
Other languages
English (en)
Inventor
Kalervo M. A. KYYTSÖNEN
Original Assignee
Subsea Welding & Engineering Limited
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 Subsea Welding & Engineering Limited filed Critical Subsea Welding & Engineering Limited
Publication of WO1985002801A1 publication Critical patent/WO1985002801A1/fr

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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3612—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents
    • B23K35/3618—Carboxylic acids or salts
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
    • 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
    • B23K9/0061—Underwater arc welding

Definitions

  • the present invention concerns a method of underwater welding in accordance with the preamble of claim 1.
  • the area to be welded is protected so that the weld area and the seam freshly welded become insulated from the effects of water.
  • Such a procedure is also called local chamber method.
  • a protective paste used in underwater arc welding which paste consists, among other things, of a base sub ⁇ stance which is mixed in glycerine and contains 40 to 60 per cent by weight of oleic acid, 1 to 40 per cent by weight of linoleic acid, 8 to 21 per cent by weight of stearic acid, 20 to 30 per cent by weight of palmitic acid, as well as 1 to 4 per cent by weight of myristinic acid.
  • the object of the present invention is to eliminate the drawbacks occurring in the prior-art technique described above and to provide a method that protects the area to be welded and the welded joint seam from the effects of water more efficiently than in prior art.
  • the method in accordance with the present invention- is based thereon that the area to be welded is covered by means of a bottomless displaceable box- shaped chamber structure, which is filled with a sealing and insulating material that, when the welding makes progress, all the time prevents penetration of water into the effective range of the chamber.
  • animal fat is used as the sealing and insulating material, in particular bovine or pork fat or combinations of same.
  • a sealing and insulating material advantageously contains at least 30 and preferably at least 60 per cent by weight of animal fat.
  • Pure animal fat has proved the most efficient protective material, which is characterized in that it is insoluble in water.
  • the animal fat is most appropriately bovine or pork fat, or a mixture of same.
  • the proportion of pork fat should preferably be increased.
  • good results have been obtained with a mixing ratio 50/50 of bovine fat to pork fat.
  • Figure 1 is a partly sche atical view of one equipment used in the method of the invention.
  • Figure 2 is a partly schematical view of a second equipment used in the method of the invention. It comes out from Fig. 1 how the sealing and insulating material can be fed in accordance with the invention into the local chamber in underwater arc welding.
  • the welder-diver works completely under the same sort of conditions as when performing wet welding. The difference lies therein that the arc area and the weld seam are protected and insulated from the effect of water by means of the local chamber.
  • a local chamber is provided by means of a device that is shaped such that the welder-diver can readily carry it when the welding makes progress so that the welding rod burns inside the local chamber 1.
  • the local chamber 1 is box-shaped and open at the bottom (rectangular opening) , and the sealing and insulating material 11 can be fed through its top portion through a hose 3 out of a feeder device 4 to 6, which, in the example case, comprises a hydraulic cylinder 6 and a cylindrical feeding container 4.
  • the piston 5 presses material 11 into the hose 3.
  • the hydraulic cylinder 6 is controlled by means of a trigger 8 fitted on the tube 2 connecting the hose 3 with the local chamber 1, and the actuating impulse of the said trigger makes, by the intermediate of the control device 7, the cylinder 6 feed new material 11 into the hose 3.
  • the feed can also be arranged so that it takes place, e.g., by means of compressed air.
  • the front portion of the box-shaped local chamber 1 is provided with an opening 9, through which the welding rod 10 can be fitted into the chamber 1.
  • the opening 9 has preferably the shape of an inverted letter U or -V.
  • sealing and insulating material 11 is fed out of the container 4 into the local chamber 1 so that it seals the effective range of the chamber against the effect of water.
  • a layer 12 of sealing and insulating material remains within the effective range of the chamber, whereby the water cannot act upon the weld seam immediately after the chamber has moved beyond the seam.
  • the welder-diver removes the material.
  • the welder-diver can regulate the quantity of the material 11 as required. Sealing and insulating mate ⁇ rial 11 must be supplied at least so much that at least the edges of the chamber 1 are covered by the material 11 inside the chamber 1.
  • the construction shown in Fig. 2 differs from that shown in Fig. 1 in the respect that the welding electrode 10 (which may also be, e.g., a wire-shaped structure unwound off a roll) penetrates into the chamber through an opening 9* placed in the top face of the local chamber 1. It is an advantage of this solution that the moving of the local chamber 1 and of the welding rod 10 may take place as one unit by one hand. Since the mouthpiece 1 has no notch, after it, no material layer 12 of the sort shown in Fig. 1 remains after it on the weld.
  • the welding electrode 10 which may also be, e.g., a wire-shaped structure unwound off a roll
  • the shape of the local chamber can, of course, be varied depending on the shape of the object to be welded.
  • the local chamber method By means of the local chamber method, a definitely watertight environment is obtained for the welding area and detrimental effects of water are ex ⁇ cluded. As regards its properties, the welding result obtained by this method equals a weld performed in an atmospheric environment.
  • the composition of the. sealing and insulating material has a decisive importance for the generation of optimal watertightness of the local chamber. Since underwater welding must be carried out both in tropical waters and in arctic waters, by changing the mixing ratio of the material it is possible to obtain the optimal viscosity for the material, required by the change in temperature, as came out above.
  • bovine and pork fat also means processed modifications of these fats and combinations of such modifications.
  • the bovine and pork fats are definable in accordance with the following code: (Joint FAO/WHO Food Standard Program; Codex Alimentarius Commission) :
  • CAC/RS 30-1969 CAC/RS 28-1969
  • CAC/RS 31-1969 CAC/RS 29-1969
  • fluorine compounds may be mixed in order to prevent absorption of hydrogen into metal.
  • fluorine compounds are, e.g., CaF-,, CF., C.Fg, CdFg, and XeF-,.
  • the proportion of these additives in the total quantity is preferably less than 40 per cent.
  • the local chamber method is described as applied in connection with arc welding, it should be noticed that the local chamber in accordance with the invention is also suitable for being used in con ⁇ nection with other types of welding.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Arc Welding In General (AREA)

Abstract

Procédé de soudage sous l'eau, selon lequel la zone à souder est recouverte à l'aide d'une structure étanche à l'eau (1), à l'intérieur de laquelle on effectue le soudage. Selon l'invention, une chambre locale (1) en forme de boîte sans fond est utilisée comme structure étanche à l'eau, dans laquelle on introduit un matériau d'étanchéification et d'isolation (11) empêchant l'eau de pénétrer à l'intérieur des bords de la chambre (1), laquelle est poussée en avant à la même vitesse d'avance que le soudage. Un matériau pâteux à base de graisse animale est utilisé de préférence comme matériau d'étanchéification et d'isolation (11).
PCT/FI1984/000101 1983-12-22 1984-12-27 Procede de soudage sous l'eau WO1985002801A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI834751 1983-12-22
FI834751A FI834751A0 (fi) 1983-12-22 1983-12-22 Undervattenssvetsfoerfarande

Publications (1)

Publication Number Publication Date
WO1985002801A1 true WO1985002801A1 (fr) 1985-07-04

Family

ID=8518256

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1984/000101 WO1985002801A1 (fr) 1983-12-22 1984-12-27 Procede de soudage sous l'eau

Country Status (4)

Country Link
EP (1) EP0165983A1 (fr)
AU (1) AU3832385A (fr)
FI (1) FI834751A0 (fr)
WO (1) WO1985002801A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990004483A1 (fr) * 1988-10-26 1990-05-03 Niinivaara Ensi Kyoesti Juhani Procede et appareil servant a realiser une soudure sous l'eau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111577828B (zh) * 2020-04-01 2021-11-12 合肥华凌股份有限公司 连接组件、同步带机构和家用电器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408175A (en) * 1942-10-23 1946-09-24 Salvage & Marine Company Electric underwater welding
GB1179354A (en) * 1967-03-21 1970-01-28 Lincoln Electric Co Arc Welding Flux, Electrodes for use therewith and Method of Welding
US4039798A (en) * 1974-06-10 1977-08-02 Boc International Limited Underwater welding
US4069408A (en) * 1976-06-07 1978-01-17 Massachusetts Institute Of Technology Method and apparatus for underwater submerged arc welding
US4154999A (en) * 1976-03-08 1979-05-15 Boc Limited Method of arc welding
US4319116A (en) * 1978-06-28 1982-03-09 Markku Kauppi Welding using soap shielding

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408175A (en) * 1942-10-23 1946-09-24 Salvage & Marine Company Electric underwater welding
GB1179354A (en) * 1967-03-21 1970-01-28 Lincoln Electric Co Arc Welding Flux, Electrodes for use therewith and Method of Welding
US4039798A (en) * 1974-06-10 1977-08-02 Boc International Limited Underwater welding
US4154999A (en) * 1976-03-08 1979-05-15 Boc Limited Method of arc welding
US4069408A (en) * 1976-06-07 1978-01-17 Massachusetts Institute Of Technology Method and apparatus for underwater submerged arc welding
US4319116A (en) * 1978-06-28 1982-03-09 Markku Kauppi Welding using soap shielding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990004483A1 (fr) * 1988-10-26 1990-05-03 Niinivaara Ensi Kyoesti Juhani Procede et appareil servant a realiser une soudure sous l'eau

Also Published As

Publication number Publication date
EP0165983A1 (fr) 1986-01-02
FI834751A0 (fi) 1983-12-22
AU3832385A (en) 1985-07-12

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