EP1286804A1 - Procede et dispositif modifies de soudage par friction a mouvement cyclique - Google Patents

Procede et dispositif modifies de soudage par friction a mouvement cyclique

Info

Publication number
EP1286804A1
EP1286804A1 EP00970326A EP00970326A EP1286804A1 EP 1286804 A1 EP1286804 A1 EP 1286804A1 EP 00970326 A EP00970326 A EP 00970326A EP 00970326 A EP00970326 A EP 00970326A EP 1286804 A1 EP1286804 A1 EP 1286804A1
Authority
EP
European Patent Office
Prior art keywords
pin
welding
friction stir
members
tool holder
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.)
Withdrawn
Application number
EP00970326A
Other languages
German (de)
English (en)
Inventor
Jan Charles Bersaas
Antonie Oosterkamp
Ljiljana Djapic Oosterkamp
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.)
Norsk Hydro ASA
Original Assignee
Norsk Hydro ASA
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 Norsk Hydro ASA filed Critical Norsk Hydro ASA
Publication of EP1286804A1 publication Critical patent/EP1286804A1/fr
Withdrawn legal-status Critical Current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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
    • B23K20/125—Rotary tool drive mechanism
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1265—Non-butt welded joints, e.g. overlap-joints, T-joints or spot welds

Definitions

  • the present invention relates to a new improved method of friction stir welding of members, more particularly to a spot welding method, and furthermore to apparatuses to conduct such method.
  • Friction stir welding is a new friction welding process representing a disruptive welding technology.
  • the principles of the process and applied apparatus disclosed by WO93/10935 are based on a relative cyclic movement between a non- consumable probe of a harder material than the workpieces to be joined and the workpieces. Urging the rotating probe into the assembled adjacent workpieces along their joining line creates a plasticized region in the workpieces due to a generated frictional heat. Thus no heat is generated as in conventional friction stir welding due to a relative motion between the workpieces to be joined.
  • This new welding method having the advantage of solid state bonding, has been successfully implemented on providing plate and profile seam joints not previously feasible and gains increasing popularity for numerous joining applications.
  • Another object of the present invention is to provide improved modifications of friction stir welding apparatuses ensuring a substantial keyhole filling during/after the probe's retraction from the joined members.
  • Still another object of the invention is to provide welds having improved mechanical properties particularly for joining of thin members.
  • Figs. 1 -2 where Fig. 1 illustrates schematically in a perspective view the novel principle of the improved friction stir welding process by examples of applicable modification of the conventional apparatus
  • Fig. 2 shows schematically in a perspective view another modification of the friction stir welding apparatus applying two pins.
  • the rotating pin 1 is contrary to the presently known and applied friction stir welding apparatuses located eccentric with regard to the longitudinal axis, in this case the vertical axis (z-axis) of the attached tool holder 3 providing connection/transmission to the source of the rotation/cyclic movement (not shown in the Figure).
  • the tool holder is adjustable both in the axial and tangential direction with regard to the pre-assembled, joined to be members A,B, while the pin 1 can independently rotate around its axis inside the tool holder with or without being provided with a fixed or movable shoulder 2.
  • a traditional shoulder 2 attached to the pin 1 it is as well for additional heat input to facilitate plasticized material flow and to prevent material from leaving the weld joint and thus to improve the weld surface's quality.
  • This novel eccentric positioning of the pin 1 in the tool holder 3 ensures a circular movement (path) of the rotating pin around the tool holder's z-axis during a gradual engagement with the to be welded members' material. After reaching the full depth the pin will complete one revolution along the circular path 5 shown in the Figure having a diameter D approximately twice the diameter d of the applied pin. The rotating pin will then be gradually retracted from the now welded plasticized material flowing from the front of the pin to the rear (part) so that up to 75% filling of the actual spot weld cavity will then be accomplished, thus substantially eliminating the keyhole problem.
  • FIG. 2 Another embodiment of the apparatus applicable in the novel welding process according to the invention is schematically shown in Fig. 2.
  • two pins 1 located eccentrically with regard to the z-axis of the tool holder 3 are applied.
  • both pins 1 are penetrating the preassembled members A,B along a circular path 5 having a diameter D approximately four times the diameter d of the applied pins.
  • the remaining keyhole volume is reduced to 1/8 of the achieved weld connection volume, or in other words up to 87.5% filling of the resulting spot weld cavity having diameter D.
  • the method can be used to provide seam welds as well.
  • both tool holder and pin keep rotating while the tool holder moves in a tangential direction.
  • full overlap can be ensured to achieve full welding along the seam.
  • a larger width seam weld is then created with a smaller diameter pin exhibiting improved weld strength. Both flush and lap welds can be thus provided.
  • the invention is not limited to the above described examples of preferred embodiments of the applicable apparatuses and the mode of their operations.
  • Several adaptations and modifications in the apparatus' configuration and welding process parameters can be made without departing from the scope of the invention.
  • the pin rotating independently of the tool holder can rotate in the opposite direction and with a different speed compared to the tool holder. More than two pins could also be applied.
  • use of an extendible pin and shoulder combined with controlled down force (load) on the shoulder will be beneficial for the welding process, but optional.

Abstract

Selon l'invention, on utilise un procédé modifié de soudage par friction à mouvement cyclique, sur une broche tournant axialement (1) et se déplaçant le long d'un trajet circulaire déterminé. Ce nouveau dispositif comprend au moins une broche tournant axialement (1) et montée de façon excentrée par rapport à l'axe vertical du porte-outil.
EP00970326A 1999-10-19 2000-10-18 Procede et dispositif modifies de soudage par friction a mouvement cyclique Withdrawn EP1286804A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO995092A NO995092D0 (no) 1999-10-19 1999-10-19 Fremgangsmåte og anordning for omröringsfriksjonssveising
NO995092 1999-10-19
PCT/NO2000/000343 WO2001028731A1 (fr) 1999-10-19 2000-10-18 Procede et dispositif modifies de soudage par friction a mouvement cyclique

Publications (1)

Publication Number Publication Date
EP1286804A1 true EP1286804A1 (fr) 2003-03-05

Family

ID=19903878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00970326A Withdrawn EP1286804A1 (fr) 1999-10-19 2000-10-18 Procede et dispositif modifies de soudage par friction a mouvement cyclique

Country Status (4)

Country Link
EP (1) EP1286804A1 (fr)
AU (1) AU7972500A (fr)
NO (1) NO995092D0 (fr)
WO (1) WO2001028731A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3400409B2 (ja) * 2000-04-28 2003-04-28 マツダ株式会社 接合方法及び接合装置
AT525779A1 (de) * 2021-12-03 2023-06-15 Stirtec Gmbh Verfahren zum Verbinden von Bauteilen durch Rührreibschweißen sowie Vorrichtung zur Durchführung eines solchen Verfahrens

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9125978D0 (en) * 1991-12-06 1992-02-05 Welding Inst Hot shear butt welding
GB2319977B (en) * 1996-12-06 1999-04-07 Lead Sheet Ass Improved friction welding apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0128731A1 *

Also Published As

Publication number Publication date
AU7972500A (en) 2001-04-30
NO995092D0 (no) 1999-10-19
WO2001028731A1 (fr) 2001-04-26

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