WO2010146702A1 - Electrode de machine de soudage par point - Google Patents

Electrode de machine de soudage par point Download PDF

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Publication number
WO2010146702A1
WO2010146702A1 PCT/JP2009/061178 JP2009061178W WO2010146702A1 WO 2010146702 A1 WO2010146702 A1 WO 2010146702A1 JP 2009061178 W JP2009061178 W JP 2009061178W WO 2010146702 A1 WO2010146702 A1 WO 2010146702A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
recess
mounting
electrode holder
tip
Prior art date
Application number
PCT/JP2009/061178
Other languages
English (en)
Japanese (ja)
Inventor
利夫 中島
敦 蕗澤
Original Assignee
P&C株式会社
新光機器株式会社
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 P&C株式会社, 新光機器株式会社 filed Critical P&C株式会社
Priority to PCT/JP2009/061178 priority Critical patent/WO2010146702A1/fr
Publication of WO2010146702A1 publication Critical patent/WO2010146702A1/fr

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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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/30—Features relating to electrodes
    • B23K11/3009—Pressure electrodes
    • B23K11/3018—Cooled pressure electrodes

Definitions

  • This invention relates to the improvement of the electrode part used for spot welding.
  • spot welding in which an electric current is applied while a metal member is crimped and the metal is melted and joined by the electric resistance heat, has been widely used as one means for welding the metal member.
  • the spot welding machine for performing such spot welding is attached to a pair of cylindrical shanks 91 arranged so as to be separable from each other and to the tips of the pair of shanks 91. It has an electrode part 90 composed of a cap chip 95. Spot welding is performed by passing an electric current while pressing the metal member with a pair of cap tips 95. At the tip of the shank 90, an attachment portion 91a having a diameter reduced in a tapered shape toward the tip is formed.
  • the cap chip 95 is formed with a mounting recess 95a having a tapered diameter toward the back.
  • the cap chip 95 is attached to the shank 91 by fitting the attachment concave portion 95a to the attachment portion 91a.
  • a water conduit 92 facing the bottom of the mounting recess 95a is disposed inside the shank 91. By supplying cooling water into the water conduit 92, the cap chip 95 is It is cooling.
  • An object of the present invention is to solve the above problems and provide an electrode portion of a spot welder in which the electrode does not fall off from the shank.
  • an electrode part of a spot welder comprising an electrode holder to which a welding current is fed and an electrode attached to this electrode holder and pressurizing a member to be welded at a contact part formed at the tip
  • a tapered mounting recess whose inner diameter gradually decreases toward the back is formed.
  • a contact portion that is a flat surface is formed around the opening of the mounting recess, At the base end of the contact part of the electrode, a taper-shaped mounting part whose outer diameter gradually decreases is formed to protrude, A contacted portion that is a flat surface is formed around the mounting portion at the base end of the contact portion, The electrode is attached to the electrode holder by fitting the attachment portion into the attachment recess so that the contacted portion is in contact with the contact portion.
  • the invention according to claim 2 is the invention according to claim 1,
  • the electrode holder is made of a material having higher yield strength than the electrode.
  • the invention according to claim 3 is the invention according to claim 1, A mounting recess is formed at the tip of the cylindrical electrode holder, A recess for removal is formed in the outer peripheral surface of the tip of the electrode holder.
  • the invention according to claim 4 is the invention according to claim 1, A cooling recess is formed in the electrode mounting part,
  • the water guide pipe to which cooling water is supplied is characterized in that the tip thereof is inserted into the concave portion for cooling water and is arranged inside a cylindrical electrode holder.
  • the electrode holder includes: A tapered mounting recess whose inner diameter is gradually reduced toward the back is formed, a flat contact portion is formed around the opening of the mounting recess, and an outer diameter is formed at the base end of the contact portion of the electrode.
  • a taper-shaped mounting portion that gradually decreases in diameter is formed so as to protrude, a contacted portion that is a flat surface is formed around the mounting portion at the base end of the contact portion, and the contacted portion becomes the contacted portion.
  • the electrode is attached to the electrode holder by fitting the attachment portion into the attachment recess so as to abut.
  • the contacted portion of the electrode is in contact with the contact portion of the electrode holder, the pressure applied when the member to be welded is pressed with a pair of opposed electrodes is a flat contacted portion. Since it acts on the contact portion side and hardly acts on the mounting recess and the mounting portion side, the mounting recess is not expanded by the mounting portion, and the fitting state between the mounting portion and the mounting recess is maintained. Does not fall off the electrode holder.
  • the invention described in claim 2 is characterized in that, in the invention described in claim 1, the electrode holder is made of a material having higher strength than the electrode.
  • an attachment recess is formed at the tip of the cylindrical electrode holder, and a removal recess is formed in the outer peripheral surface of the tip of the electrode holder.
  • the cooling recessed portion is formed in the electrode mounting portion, and the water guide pipe to which the cooling water is supplied is inserted into the cooling water recessed portion. It is inserted and disposed inside a cylindrical electrode holder.
  • the electrode unit 50 of the spot welder is composed of a cylindrical electrode holder 10 and an electrode 20 attached to the tip of the electrode holder 10.
  • the electrode holder 10 having a shape as shown in FIG. 1 is generally called a shank.
  • the electrode holder 10 is attached to a power feeding unit of a spot welder, and a welding current is fed from the power feeding unit.
  • a mounting recess 10 a is formed at the tip of the electrode holder 10.
  • the inner surface of the mounting recess 10a has a tapered shape in which the inner diameter gradually decreases toward the back.
  • a flat contact portion 10b is formed around the opening of the mounting recess 10a at the tip of the electrode holder 10. The surface of the contact portion 10b is orthogonal to the forming direction of the mounting recess 10a.
  • the electrode 20 is integrally formed with a contact portion 20a formed at the tip and a mounting portion 20b protruding from the base end of the contact portion 20a.
  • the contact portion 20a is in contact with the member to be welded and pressurizes the member to be welded.
  • the outer peripheral surface of the mounting portion 20b has a tapered shape in which the outer diameter gradually decreases in the protruding direction.
  • the taper angle of the mounting portion 20b is the same as the taper angle of the mounting recess 10a.
  • the attachment portion 20b has a shape corresponding to the attachment recess 10a.
  • the width of the base end of the contact portion 20a is larger than the width of the base end of the mounting portion 20b, and a flat contacted portion 20c is provided around the mounting portion 20b of the base end of the contact portion 20a. Is formed.
  • the surface of the contacted portion 20c is orthogonal to the protruding direction of the mounting portion 20b.
  • a cooling recess 20d is recessed at the tip of the mounting portion 20b.
  • the attachment portion 20 b of the electrode 20 is inserted into each attachment recess 10 a of the pair of electrode holders 10.
  • the contact portion 10b and the contacted portion 20c are separated by a predetermined dimension a. That is, when the mounting portion 20b of the electrode 20 is inserted into the mounting recess 10a, the mounting recess 10a and the mounting portion 20b are formed so that the contact portion 10b and the contacted portion 20c are separated by a predetermined dimension a. Yes.
  • the predetermined dimension a is 0.3 to 1.5 mm.
  • the electrodes 20 attached to the tips of the pair of electrode holders 10 are brought into contact with each other and further pressurized. Then, as shown in FIG. 2C, the attachment portion 20b is fitted into the attachment recess 10a, and the abutted portion 20c abuts against the abutment portion 10b.
  • the length of the mounting recess 10a is set to be longer than the length of the mounting portion 20b so that the tip of the mounting portion 20b does not reach the end of the mounting recess 10a. Is also set larger.
  • the electrode holder 10 is made of a material having higher strength than the electrode 20.
  • the electrode holder 10 is made of beryllium copper, and the electrode 20 is made of chrome copper. Since the proof strength of the electrode holder 10 is higher than the proof strength of the electrode 20, even if the mounting portion 20b is fitted in the mounting recess 10a, plastic deformation of the mounting recess 10a is suppressed, and the expansion of the mounting recess 10a is suppressed. The Further, since the cooling portion 20d is formed in the mounting portion 20b of the electrode 20, the thickness of the mounting portion 20b is thin, so that the mounting portion 20b is elastically deformed inward with almost no plastic deformation.
  • the fitting state between the portion 20b and the mounting recess 10a is maintained.
  • the beryllium copper is 0.2 to 3.0% beryllium (Be), 0.15 to 2.5% cobalt (Co), and the balance is copper (Cu) and inevitable impurities. It is a copper alloy.
  • Chromium copper is a copper alloy having a mass ratio of 0.4 to 1.3% chromium and the balance copper and inevitable impurities.
  • the electrode holder 10 and the electrode 20 have increased proof stress and hardness by solution treatment and precipitation hardening treatment.
  • the contacted portion 20 c formed on the electrode 20 is in contact with the contact portion 10 b formed on the electrode holder 10.
  • the pressure applied when the member to be welded is pressed acts on the abutted portion 20c and the abutting portion 10b, which are flat surfaces, and hardly acts on the attaching concave portion 10a and the attaching portion 20b side. It is not expanded by the mounting portion 20b. For this reason, since the fitting state of the attachment part 20b and the attachment recessed part 10a is maintained, the electrode 20 does not drop from the electrode holder 10.
  • the water conduit 30 is disposed inside the electrode holder 10.
  • the tip of the water conduit 30 is inserted into the cooling recess 20 d of the electrode 20.
  • the opening of the water conduit 30 faces the bottom of the cooling recess 20 d of the electrode 20.
  • the electrode 20 is cooled by the cooling water supplied into the water conduit 30.
  • the cooling water that has cooled the electrode 20 flows through the flow path inside the electrode holder 10 and outside the water conduit 30 and is discharged from the electrode holder 10.
  • the cooling recess 20d is formed in the electrode 20, and the tip of the water conduit 30 is inserted into the cooling recess 20d, so that the cooling water supplied from the water conduit 30 is the bottom surface of the cooling recess 20d.
  • the electrode 20 is not overheated and softening of the contact part 20a of the electrode 20 is suppressed. For this reason, the deformation of the contact portion 20a is suppressed, and the life of the electrode 20 is prolonged. Moreover, since the electrode 20 is not overheated, an increase in electrical resistance is suppressed, and a welding current can be efficiently passed through the member to be welded.
  • a recess 10c for removal is formed in the outer peripheral surface at the tip of the electrode holder 10.
  • a removal recess 10c may be formed in a part of the outer peripheral surface of the tip of the electrode holder 10, and as shown in FIG.
  • the removal recess 10c may be formed all around the outer peripheral surface of the tip.
  • the electrode 20 can be removed from the electrode holder 10 by opening the movable claw 82.
  • the electrode 20 can be removed from the electrode holder 10 by inserting the electrode removal tool into the removal recess 10c.
  • the shape of the contact portion 20a of the electrode 20 is not limited to the shape shown in FIG. 1, but a truncated cone shape (shown in FIG. 5A), a planar shape (shown in FIG. 5B), or an eccentric shape. It may be a shape such as (shown in FIG. 5C).
  • the electrode holder 11 may be bent in a substantially J shape or the like.
  • the technical idea of the present invention can also be applied to the plate-like electrode holder 12.
  • 12a is an attachment recessed part
  • 12b is an abutting part
  • 21a is a contact part
  • 21b is an attaching part
  • 21c is an abutted part.
  • the electrode 21 is attached to the electrode holder 12 by fitting the attachment portion 21b into the attachment recess 12a so that the contacted portion 21c contacts the contact portion 12b.
  • the electrode 21 is attached to the plate-like electrode holder 13 having the mounting protrusion 13a protruding on the surface.
  • a mounting concave portion 13b is formed at the tip of the mounting convex portion 13a.
  • the electrode holder 13 is formed with cooling water passages 13e and 13f communicating with the mounting recess 13b.
  • the electrode 21 is attached to the electrode holder 13 by fitting the attachment portion 21b into the attachment recess 13b so that the contacted portion 21c contacts the contact portion 13c.
  • the attachment portion 21 b is cooled by flowing the cooling water through the cooling water passage 13 e, and overheating of the electrode 21 is prevented.
  • the cooling water that has cooled the mounting portion 21b flows through the cooling water passage 13f and is discharged from the electrode holder 13 to the outside.
  • the electrode holder 10 is made of beryllium copper and the electrode 20 is made of chrome copper.
  • the electrode holder 10 is made of a material having a higher proof strength than the electrode 20, other materials may be used.
  • the electrode holder 10 may be made of beryllium copper, and the electrode 20 may be made of zirconium copper, cadmium copper, chromium zirconium copper, or alumina dispersion strengthened copper.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Welding (AREA)

Abstract

La présente invention se rapporte à l'électrode d'une machine de soudage par point, l'électrode ne pouvant pas tomber d'une tige. Un renfoncement de montage conique (10a) dont le diamètre intérieur diminue progressivement vers la profondeur est formé au niveau de la pointe d'un porte-électrode tubulaire (10), une partie d'appui plane (10b) est formée sur la périphérie de l'ouverture du renfoncement de montage (10a), une partie de montage conique (20b) est formée sur l'extrémité proximale d'une partie de contact (20a) de manière à faire saillie, son diamètre extérieur diminuant progressivement, une partie de réception plane (20c) est formée sur la périphérie de la partie de montage (20b) sur l'extrémité proximale de la partie de contact (20a), puis la partie de montage (20b) est installée dans le renfoncement de montage (10a) de sorte que la partie de réception (20c) s'appuie sur la partie d'appui (10b). Etant donné que la partie de réception (20c) s'appuie sur la partie d'appui (10b), le renfoncement de montage (10a) n'est pas étendu par la partie de montage (20b) même si un élément à souder est pressé à l'aide d'une paire d'électrodes (20) disposées à l'opposé l'une de l'autre, et l'électrode (20) ne tombera pas du porte-électrode (10).
PCT/JP2009/061178 2009-06-19 2009-06-19 Electrode de machine de soudage par point WO2010146702A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/061178 WO2010146702A1 (fr) 2009-06-19 2009-06-19 Electrode de machine de soudage par point

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/061178 WO2010146702A1 (fr) 2009-06-19 2009-06-19 Electrode de machine de soudage par point

Publications (1)

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WO2010146702A1 true WO2010146702A1 (fr) 2010-12-23

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014053117A3 (fr) * 2012-10-05 2014-05-30 Kme Germany Gmbh & Co. Kg Électrode pour pince à souder
WO2018101249A1 (fr) * 2016-12-01 2018-06-07 日本碍子株式会社 Élément support éléctroconduteur et procédé de fabrication d'un tel élément support éléctroconduteur
WO2021165983A1 (fr) * 2020-02-21 2021-08-26 Sumit Dhody Supports d'électrode

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59190486U (ja) * 1983-06-06 1984-12-17 株式会社日立製作所 スポツト溶接電極
JPH0242778U (fr) * 1988-09-09 1990-03-23
JPH1034351A (ja) * 1996-07-25 1998-02-10 Nissan Motor Co Ltd スポット溶接ガンの電極チップ構造およびその電極チップの製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59190486U (ja) * 1983-06-06 1984-12-17 株式会社日立製作所 スポツト溶接電極
JPH0242778U (fr) * 1988-09-09 1990-03-23
JPH1034351A (ja) * 1996-07-25 1998-02-10 Nissan Motor Co Ltd スポット溶接ガンの電極チップ構造およびその電極チップの製造方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014053117A3 (fr) * 2012-10-05 2014-05-30 Kme Germany Gmbh & Co. Kg Électrode pour pince à souder
WO2018101249A1 (fr) * 2016-12-01 2018-06-07 日本碍子株式会社 Élément support éléctroconduteur et procédé de fabrication d'un tel élément support éléctroconduteur
JPWO2018101249A1 (ja) * 2016-12-01 2018-12-06 日本碍子株式会社 導電性支持部材及びその製造方法
KR20190008382A (ko) * 2016-12-01 2019-01-23 엔지케이 인슐레이터 엘티디 도전성 지지 부재 및 그 제조 방법
KR102138353B1 (ko) 2016-12-01 2020-07-28 엔지케이 인슐레이터 엘티디 도전성 지지 부재 및 그 제조 방법
US11608545B2 (en) 2016-12-01 2023-03-21 Ngk Insulators, Ltd. Conductive supporting member and method for producing the same
WO2021165983A1 (fr) * 2020-02-21 2021-08-26 Sumit Dhody Supports d'électrode

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