WO2013098965A1 - Procédé de soudage, dispositif de soudage et produit de soudage - Google Patents

Procédé de soudage, dispositif de soudage et produit de soudage Download PDF

Info

Publication number
WO2013098965A1
WO2013098965A1 PCT/JP2011/080310 JP2011080310W WO2013098965A1 WO 2013098965 A1 WO2013098965 A1 WO 2013098965A1 JP 2011080310 W JP2011080310 W JP 2011080310W WO 2013098965 A1 WO2013098965 A1 WO 2013098965A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
bead
residual stress
weld bead
workpiece
Prior art date
Application number
PCT/JP2011/080310
Other languages
English (en)
Japanese (ja)
Inventor
内田　圭亮
信吾 岩谷
Original Assignee
トヨタ自動車株式会社
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 トヨタ自動車株式会社 filed Critical トヨタ自動車株式会社
Priority to PCT/JP2011/080310 priority Critical patent/WO2013098965A1/fr
Publication of WO2013098965A1 publication Critical patent/WO2013098965A1/fr

Links

Images

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
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding
    • 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
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • B23K15/0053—Seam welding
    • 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
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • B23K15/0086—Welding welding for purposes other than joining, e.g. built-up welding
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/26—Seam welding of 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/28—Seam welding of curved planar 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/34—Laser welding for purposes other than joining
    • B23K26/342—Build-up welding
    • 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
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/028—Seam welding; Backing means; Inserts for curved planar seams

Definitions

  • the present invention relates to a welding method, a welding apparatus, and a welded product that reduce residual stress generated in a workpiece base metal by welding.
  • Patent Document 1 an arc generating ring and a magnetic field forming ring coil are arranged on the outer periphery of a welded hollow body (tube), and the arc is rotated at a high speed in the circumferential direction so that the outer peripheral portion of the annular welded portion.
  • a technique for reducing the residual stress in the vicinity of the welded portion by heating the material uniformly and rapidly is disclosed.
  • Patent Document 1 has the following problems. In order to reheat the welded portion, apart from the welding apparatus, the above-described arc generating ring, ring coil, and apparatus for operating these are necessary, and the equipment cost increases. In addition, since the welded portion is reheated, depending on the material of the base material, a brittle metal structure is formed in the welded portion due to reheating, which may reduce the strength of the welded joint. For example, when the base material is a casting, a brittle chill layer may be formed due to reheating of the welded portion, and the strength of the welded joint may be reduced.
  • the present invention has been made in view of the above points, and an object of the present invention is to provide a welding method, a welding apparatus, and a welded product that reduce residual stress generated in a workpiece by welding.
  • the welding method according to the present invention is characterized in that a weld bead is formed by welding a joint portion of a work, and then forming a discarded bead by welding the vicinity of the weld bead of the work.
  • a welding apparatus includes a welding torch for performing welding, a feeding means for moving the welding torch, and a control means for controlling the feeding means.
  • the feeding means is controlled by the control means to perform welding while moving the welding torch along the joint portion to form a weld bead at the joint portion, and then the welding torch is placed in the vicinity of the weld bead.
  • the welded product according to the present invention is characterized in that a weld bead is formed by welding a workpiece joint, and then a portion near the weld bead of the work is welded to form a discarded bead. .
  • the distribution of the residual stress generated in the base material can be changed and the residual stress can be reduced by the formation of the weld bead.
  • FIG. 3 is a schematic view showing a longitudinal section of a main part of a welding apparatus and a main part of a welded workpiece according to an embodiment of the present invention, taken along line DD in FIG. 2. It is the top view which shows the welded workpiece
  • FIG. 4 is an enlarged schematic view showing a welded portion and a section taken along line DD when the present invention is applied to welding of a cylindrical member. It is the schematic which expands and shows the cross section by the EE line
  • FIG. 1 shows a schematic configuration of a welding apparatus 1 according to the present embodiment and a longitudinal section including a welded portion of a workpiece W welded by the welding apparatus 1.
  • the welding device 1 includes a welding torch 2 for performing welding, a feeding device 3 (feeding means) such as a robot arm that moves the welding torch 2 with a required degree of freedom, and a controller that controls the operations of the feeding device 3 and the welding torch 2. 4 (control means), and an automatic welding machine that performs welding while moving the torch along the welded portion of the workpiece W.
  • a welding method by the welding apparatus 1 can employ
  • the workpiece W is a coarse material for gears of an automobile final reduction gear, a transmission, etc., and a ring-shaped member having a tooth profile 5A formed by machining or the like on the outer peripheral portion and having an opening 5B in the central portion. 5 and a shaft-like member 6 (only one end including the welded portion is shown) that is welded and integrated with the ring-like member 5.
  • work W should just be a metal which can be welded, and steel for gears is employ
  • the ring-shaped member 5 has a thinner inner peripheral portion than the outer peripheral portion where the tooth profile 5A is formed.
  • the shaft-shaped member 6 has an outer peripheral portion on one end side that is enlarged in diameter, and a hub portion 7 is integrally formed.
  • the hub portion 7 has an outer diameter that can be inserted into the opening portion 5 ⁇ / b> B of the ring-shaped member 5 with an appropriate fitting tolerance, and has the same thickness as the inner peripheral portion of the ring-shaped member 5.
  • An annular groove 9 is formed in the axial center portion of the outer peripheral surface of the hub portion 7 along the circumferential direction.
  • the hub portion 7 is inserted into the opening portion 5B of the ring-shaped member 5, the outer peripheral surface of the hub portion 7 and the inner peripheral surface of the opening portion 5B of the ring-shaped member 5 are brought into contact with each other, and these joint portions are pivoted. Weld from both directions. As a result, the weld bead 10 is formed at the joint, and the ring-shaped member 5 and the shaft-shaped member 6 are coupled. Thereafter, the outer peripheral portions of the weld beads 10 formed on both sides in the axial direction of the joint portion between the ring-shaped member 5 and the hub portion 7 of the shaft-shaped member 6 are heated and melted by the welding torch 2 to form the discarded beads 11. To do.
  • the weld bead 10 is formed to a depth reaching the annular groove 9 of the hub portion 7, whereas the discarded bead 11 is smaller than the weld bead 10, and the depth is greater than that of the weld bead 10. It is slightly shallower.
  • work W with the welding apparatus 1 is demonstrated in detail.
  • the hub portion 7 of the shaft-like member 6 is inserted into the opening 5 ⁇ / b> B of the ring-shaped member 5, and the inner peripheral surface of the ring-shaped member 5 and the outer peripheral surface of the hub portion 7 are abutted and fixed. .
  • welding is performed while the welding torch 2 of the welding apparatus 1 is opposed to the joint portion between the ring-shaped member 5 and the hub portion 7 of the shaft-shaped member 6 and is moved along the joint portion.
  • the weld bead 10 having a depth reaching the annular groove 9 of the hub portion 7 is formed by melting the joint portion. And the junction part of the axial direction both sides of the ring-shaped member 5 and the hub part 7 is welded sequentially, and the same weld bead 10 is formed in each.
  • FIG. 3 shows a result of measuring the residual stress distribution of the ring-shaped member 5 in a state where only the weld bead 10 is formed by a measuring method using X-ray diffraction or the like.
  • FIG. 3 shows the tensile residual stress in the direction orthogonal to the weld bead 10 of each part in the direction from the weld bead 10 of the ring-shaped member 5 to the radially outer side (the direction orthogonal to the weld bead 10).
  • a discarded bead 11 is formed in the vicinity of the position A in the vicinity of the weld bead 10 where the residual stress has a peak.
  • the welding torch 2 is moved to the position A and heated while feeding the welding torch 2 along the circumferential direction.
  • the discarded beads 11 are formed along the circumferential direction in the vicinity of the position A near the outer peripheral side of the weld bead 10 by melting.
  • the discarded beads 11 are formed on both sides in the axial direction corresponding to the weld beads 10.
  • the discarded bead 11 is made smaller than the weld bead 10 and its depth is slightly shallower than the weld bead 10.
  • the position where the discarded bead 11 is formed is determined in the vicinity of the position A where the residual stress peaks, and the formation of the discarded bead 11 is determined so as not to cause a problem in the strength and finished shape of the workpiece W. That's fine.
  • the discarded bead 11 By forming the discarded bead 11 in this way, at the position A, the base material of the ring-shaped member 5 is heated and melted to release the residual stress. On the other hand, due to heating and cooling when forming the discarded bead 11, tensile residual stress is generated in the vicinity of the outer peripheral side of the discarded bead 11, as in the case of forming the weld bead 10. In this case, since the size (depth) of the discarded bead 11 is smaller (shallow) than the weld bead 10, the residual stress is also reduced. As a result, by forming the discarded bead 11, the residual stress peak moves from the position A to the outer peripheral side, and the magnitude of the residual stress is reduced.
  • the workpiece W product was broken near the outer periphery of the weld bead 10.
  • the peak of the residual stress is at position A, and the fracture point in the fatigue test (the outer periphery of the weld bead 10)
  • the residual stress at position B in the vicinity of the vicinity of the portion is considerably large. This causes a decrease in fatigue strength.
  • the residual stress peak moves to the outer peripheral side of the ring-shaped member 5, and accordingly, the position B near the fracture point in the fatigue test.
  • the residual stress at the position B near the fracture point can be reduced by about 70%. As a result, it is possible to increase the fatigue strength of the welded portion and suppress the occurrence of product defects such as delayed cracking.
  • the welding bead 11 can be formed by moving the welding torch 2 after forming the welding bead 10 using the welding apparatus 1, the existing equipment can be used, and the equipment cost can be reduced. There is no increase.
  • the discarded bead 11 is formed on the outer peripheral side of the weld bead 10
  • the discarded bead may be formed on the inner peripheral side of the weld bead 10.
  • the residual stress generated on the inner peripheral side of the weld bead 10 can be moved to the inner peripheral side by the discarded bead and the residual stress can be reduced.
  • FIG. 4A shows a workpiece W1 applied in the second embodiment
  • FIG. 4B shows an enlarged cross section of the workpiece W1 along the line EE.
  • the workpiece W1 is cylindrical members 12 and 13, and their end faces are abutted and welded.
  • the butted portion is welded from the outer peripheral side of the cylindrical members 12 and 13 by the welding torch 2 of the welding apparatus 1 to form a weld bead 14 that reaches the inner peripheral surface.
  • the discarding bead 15 is formed by moving the welding torch 2 near the position A where the residual stress generated in the cylindrical member 13 by the weld bead 14 peaks.
  • the peak can be further moved to the cylindrical member 13 side and the residual stress can be reduced.
  • the residual stress at the position B (see FIG. 4B) on the cylindrical member 13 side in the vicinity of the weld bead 14 can be reduced.
  • the discarded bead 15 may be provided on the cylindrical member 12 side, may be provided on both sides of the cylindrical members 12 and 13, or the cylindrical beads 12 and 13 may be provided. You may provide in an inner peripheral part and can arrange
  • FIG. 5A shows a work W2 applied in the third embodiment
  • FIG. 5B shows an enlarged cross section of the work W1 along the line FF.
  • the workpiece W ⁇ b> 1 is a flat plate member 16, 17, and these end surfaces are abutted and welded. This butted portion is welded from one side of the flat members 16 and 17 by the welding torch 2 to form a weld bead 18 that reaches the other side.
  • the discarding bead 119 is formed by moving the welding torch 2 near the position A where the residual stress generated in the flat plate member 17 by the weld bead 18 peaks.
  • the peak can be further moved to the flat plate member 17 side and the residual stress can be reduced.
  • the residual stress at the position B (see FIG. 5B) on the flat plate member 17 side in the vicinity of the weld bead 18 can be reduced.
  • the discard bead 19 may be provided on the flat plate member 16 side, may be provided on both sides of the flat plate members 16 and 17, or the flat plate members 16 and 17 may be provided. It may be provided on the other surface side and can be appropriately arranged depending on the position where the residual stress to be reduced occurs.
  • the present invention can be applied to a workpiece having a shape different from the shapes of the workpieces W to W2 in the first to third embodiments, and the residual stress to be reduced is reduced with respect to the residual stress generated by welding.
  • the discarded beat can be appropriately arranged according to the position.
  • this invention is similarly applied to other forms of welding, such as fillet welding. Can be applied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

L'objet de la présente invention est de réduire la contrainte résiduelle qui se produit dans une pièce à usiner à partir du soudage. Selon la présente invention, la jonction d'un élément annulaire (5) qui constitue une pièce à usiner (W) et d'une section de moyeu (7) d'un élément en forme d'arbre (6) est soudée au moyen de la torche de soudage (2) d'un dispositif de soudage (1) et un cordon de soudure (10) est formé de manière à joindre mutuellement les deux éléments. Un cordon de soudure de mise au rebut (11) est formé à proximité du cordon de soudure (10) au moyen d'un chauffage et d'un refroidissement localisé au cours de la formation du cordon de soudure (10), en déplaçant la torche de soudage (2) à proximité d'une position (A) où la contrainte résiduelle qui se produit sur le matériau de base de l'élément annulaire (5) atteint un pic et en soudant à cet emplacement. Par conséquent, la contrainte résiduelle à proximité de la position (A) est relâchée, la position où la contrainte résiduelle atteint un pic se déplace vers le côté périphérique extérieur et la contrainte résiduelle est réduite. En conséquence de quoi, la résistance à la fatigue de la pièce à usiner (W) peut être augmentée et l'occurrence de fissure retardée peut être minimisée.
PCT/JP2011/080310 2011-12-27 2011-12-27 Procédé de soudage, dispositif de soudage et produit de soudage WO2013098965A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/080310 WO2013098965A1 (fr) 2011-12-27 2011-12-27 Procédé de soudage, dispositif de soudage et produit de soudage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/080310 WO2013098965A1 (fr) 2011-12-27 2011-12-27 Procédé de soudage, dispositif de soudage et produit de soudage

Publications (1)

Publication Number Publication Date
WO2013098965A1 true WO2013098965A1 (fr) 2013-07-04

Family

ID=48696530

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/080310 WO2013098965A1 (fr) 2011-12-27 2011-12-27 Procédé de soudage, dispositif de soudage et produit de soudage

Country Status (1)

Country Link
WO (1) WO2013098965A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105057854A (zh) * 2015-09-11 2015-11-18 上海电气核电设备有限公司 一种控制熔深的不锈钢铸件表面堆焊方法
JP2016137591A (ja) * 2015-01-26 2016-08-04 ファナック株式会社 射出成形機の機台
EP3409410A4 (fr) * 2016-01-28 2019-10-02 Nippon Steel Corporation Procédé d'amélioration de la résistance à la fatigue de joint soudé par recouvrement, procédé de fabrication de joint soudé par recouvrement, et joint soudé par recouvrement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53141140A (en) * 1977-05-16 1978-12-08 Hitachi Ltd Process for forming weld joint of pipeline or vessel
JP2002144082A (ja) * 2000-11-09 2002-05-21 Nippon Steel Corp 疲労強度に優れた軟鋼または４９０ＭＰａ級鋼の溶接継手およびその作製方法
WO2011068155A1 (fr) * 2009-12-04 2011-06-09 新日本製鐵株式会社 Joint soudé bord à bord d'une structure soudée et procédé de fabrication de ce joint
WO2011089706A1 (fr) * 2010-01-22 2011-07-28 トヨタ自動車株式会社 Structure soudée et procédé de soudure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53141140A (en) * 1977-05-16 1978-12-08 Hitachi Ltd Process for forming weld joint of pipeline or vessel
JP2002144082A (ja) * 2000-11-09 2002-05-21 Nippon Steel Corp 疲労強度に優れた軟鋼または４９０ＭＰａ級鋼の溶接継手およびその作製方法
WO2011068155A1 (fr) * 2009-12-04 2011-06-09 新日本製鐵株式会社 Joint soudé bord à bord d'une structure soudée et procédé de fabrication de ce joint
WO2011089706A1 (fr) * 2010-01-22 2011-07-28 トヨタ自動車株式会社 Structure soudée et procédé de soudure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016137591A (ja) * 2015-01-26 2016-08-04 ファナック株式会社 射出成形機の機台
CN105057854A (zh) * 2015-09-11 2015-11-18 上海电气核电设备有限公司 一种控制熔深的不锈钢铸件表面堆焊方法
EP3409410A4 (fr) * 2016-01-28 2019-10-02 Nippon Steel Corporation Procédé d'amélioration de la résistance à la fatigue de joint soudé par recouvrement, procédé de fabrication de joint soudé par recouvrement, et joint soudé par recouvrement

Similar Documents

Publication Publication Date Title
KR101668628B1 (ko) 압연롤의 제조 방법 및 압연롤, 및 압연롤의 제조 장치
KR101753445B1 (ko) 마찰 용접에 의한 알루미늄 합금 프로펠러 샤프트 제조 방법
CN103769746B (zh) 一种脉冲强磁场辅助激光焊接方法与设备
US20070090159A1 (en) Clamp apparatus, joining method, and method of manufacturing hollow member
CA2262784C (fr) Procede de soudage par friction lineaire destine a la production de jantes de roues
EP1920868A1 (fr) Procédé d agitation et jonction par friction et procédé de fabrication d'un corps creux
WO2013098965A1 (fr) Procédé de soudage, dispositif de soudage et produit de soudage
KR101007592B1 (ko) 하이브리드 마찰 교반 접합장치
JP4178106B2 (ja) 車軸およびそれを作る方法と装置
JP5730139B2 (ja) 鋼材の突合わせ溶接方法
JP2017531563A (ja) 金属パーツを突合せ接続するための加熱接合法
KR101276334B1 (ko) 하이브리드 마찰교반에 의한 알루미늄 합금과 티타늄 합금의 접합방법
EP0916443A1 (fr) Organe rotatif et arbre rotatif, rouleau de fixation, organe cylindrique, et cylindre d'appareil de formation d'images, méthode de soudage d'organe cylindrique, méthode de fabrication d'arbre rotatif, méthode de fabrication de manchon de développement d'appareil de formation d'images
JP2006159212A (ja) 金属機械部品の液相拡散接合方法および金属機械部品
JP5686582B2 (ja) アクスルケースの製造方法
US20200398360A1 (en) System and method for forming a weld along a length
JP6400916B2 (ja) 接合体の製造方法
EP2364808B1 (fr) Procédé pour la formation préférentielle d'un joint de soudage
Üstündağ et al. Hybrid laser-arc welding of thick-walled pipe segments with optimization of the end crater
JP2017087263A (ja) 溶接方法
JP6589171B2 (ja) 金属樹脂接合方法及び金属樹脂接合体
WO2018070316A1 (fr) Dispositif et procédé de soudage par friction-malaxage
WO2016047619A1 (fr) Corps lié, procédé de liaison par arc rotatif magnétique, et procédé pour fabriquer un corps lié
JP7028735B2 (ja) 異材接合構造体の製造方法及び異材接合構造体
JP7319231B2 (ja) 異材接合構造体の製造方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11878511

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11878511

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP

122 Ep: pct application non-entry in european phase

Ref document number: 11878511

Country of ref document: EP

Kind code of ref document: A1