WO2011145506A1 - 塗装鋼板の溶接方法 - Google Patents

塗装鋼板の溶接方法 Download PDF

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Publication number
WO2011145506A1
WO2011145506A1 PCT/JP2011/060912 JP2011060912W WO2011145506A1 WO 2011145506 A1 WO2011145506 A1 WO 2011145506A1 JP 2011060912 W JP2011060912 W JP 2011060912W WO 2011145506 A1 WO2011145506 A1 WO 2011145506A1
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WO
WIPO (PCT)
Prior art keywords
metal body
punch
welding
die
metal
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/JP2011/060912
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English (en)
French (fr)
Japanese (ja)
Inventor
剛之 吉田
博 朝田
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.)
Nippon Steel Nisshin Co Ltd
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Nisshin Steel Co Ltd
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 Nisshin Steel Co Ltd filed Critical Nisshin Steel Co Ltd
Priority to CN201180024529.1A priority Critical patent/CN102917832B/zh
Priority to AU2011256544A priority patent/AU2011256544B2/en
Publication of WO2011145506A1 publication Critical patent/WO2011145506A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B23K11/14—Projection 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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/10—Spot welding; Stitch welding
    • B23K11/11—Spot 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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
    • B23K11/163—Welding of coated materials
    • B23K11/166—Welding of coated materials of galvanized or tinned materials
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

Definitions

  • the present invention relates to a method in which a surface covered with an insulating film of a metal plate whose one surface is covered with an insulating film and a metal body in contact with the surface are joined by resistance welding.
  • an insulating film such as a coating film is widely used in various directions.
  • a method of providing an insulation film there are cases where a structure is produced with a metal plate and the insulation film is applied in a later process, or a structure is constructed using a metal plate covered with an insulation film. is there.
  • resistance welding is often used as a joining method required for the assembly.
  • the cost of the post-process for applying the insulating film is higher than that for assembling a metal plate that has been previously provided with the insulating film. Therefore, it is desired to assemble the structure using a metal plate to which an insulating film has been applied in advance.
  • As a joining method in that case since there is an insulating film and resistance welding cannot be performed without energization, joining methods using rivets, bolts and nuts, or screws are often used.
  • the joining method using the secondary material increases the weight of the joined structure and increases the cost of the structural body due to the cost of the secondary material. Therefore, a method for bonding even a metal body provided with an insulating film has been considered.
  • Patent Document 1 when there is an insulating film on one surface side of a metal body to be bonded, two electrodes are paired with an electrode provided with a protrusion on the side where the two metal body films are bonded.
  • a method has been proposed in which the metal body is pressed from above and below, the film is broken and the metal body is energized and joined by resistance welding.
  • Patent Document 2 when there is an insulating film on one surface side of a metal body to be bonded, a hole is formed in the film with a mold provided with a protrusion on the side where the film of the two metal bodies to be bonded is present, Thereafter, a method has been proposed in which two metal bodies are pressed from above and below with a pair of electrodes, thereby energizing the metal bodies and joining them by resistance welding.
  • Patent Document 3 when there is an insulating film on one surface of the metal body to be bonded, a hole is formed in the metal body with the film, and a conical protrusion is provided on the other metal body without the film.
  • the metal bodies are energized and joined by resistance welding.
  • Patent Document 4 when there is an insulating film on one surface of the metal body to be joined, a hole is formed in the metal body with the film with a tapered die, and the film of the hole of the metal body is broken.
  • a method has been proposed in which two metal bodies are pressed from above and below with a pair of electrodes in a state where the portion is in contact with another metal body that can be energized to energize the metal bodies and join them by resistance welding. .
  • the electrode on the side that breaks the insulating film must be an electrode provided with a protrusion having a shape that is so sharp that the tip can break the film. It must be a thin line. Therefore, it is not possible to flow a rapidly increasing welding current as in the case of capacitor storage type resistance welding, and it is limited to resistance welding with a very small capacity welding current.
  • the tip of the electrode since the minimum necessary pressure is applied between both welding electrodes, the tip of the electrode is easily damaged or deformed by the welding current and the pressure applied between the welding electrodes, Since the film cannot be broken immediately, the electrodes must be frequently replaced, and it is difficult to employ such a resistance welding method in actual welding operations.
  • the electrode tip penetrates the metal body due to the applied pressure, and the current cannot flow directly to the metal body without the film and cannot be welded. turn into. Furthermore, even when there is a film on the surface to which the metal body is joined, welding cannot be performed because the tip of the electrode penetrates the metal body and a current flows directly through the metal body without the film.
  • Patent Document 2 a hole is made in a film on the surface of a metal body to be welded by a mold, and pressure is applied with an electrode from above and below to energize welding.
  • an electrode from above and below to energize welding.
  • the area where the welding electrode contacts the metal body inside the film cannot be obtained, and resistance welding by energization becomes difficult.
  • Patent Document 1 when there is a film on the surface to which the metal body is joined, the film cannot be broken and welding cannot be performed.
  • a hole is formed in the metal body on the side where the film is provided by a mold, and a protrusion is provided on the metal body on which the film is not bonded, so that the metal body in the hole is exposed.
  • This is a method of joining and energizing the projections in contact with the projecting parts, but with this method, both of the two metal bodies to be joined must be processed, and the labor and time required for the processing are reduced. Cost increases from relationship.
  • the positions of the corresponding holes and protrusions must all be matched, so that highly accurate processing is required.
  • Patent Document 4 is to make a hole in a metal body on the side where a film is provided with a tapered tool, and to bring a portion where the metal body is exposed into contact with an energizable portion of the other metal body.
  • resistance welding is performed, and the problems of the above-mentioned Patent Documents 1, 2, and 3 are solved.
  • the tool when the thickness of the metal body to be perforated is thick, the tool must be rotated, and a mechanism for vertical driving and a mechanism for rotational driving are required, resulting in high equipment costs.
  • the bonding strength is proportional to the bonding area, but in order to increase the bonding strength, it is possible to energize the other metal body to be bonded by enlarging the hole opened with a tapered tool. It is necessary to increase the area that is in contact with various points.
  • the hole opened with a tapered tool is made larger than a certain level, the hole will tear as shown in FIG. 1 (a) and the contact area cannot be increased. The current is excessively concentrated at the tip portion, and sparks are generated, making it difficult to join.
  • the height of the protrusion is increased with a tapered tool. When high protrusions are joined, a gap is created because the molten metal remains as a molten metal between the two metal bodies joined by the height of the protrusions. If the electrode pressure at the time of bonding is increased, molten metal is pushed out at the time of bonding and bonding without gaps is possible. However, if the electrode pressure is high, the contact area becomes too large and the voltage must be increased. The film is damaged by high voltage heat input.
  • the present invention has been devised in order to solve such problems, and it is necessary to energize a surface covered with an insulating film of a metal plate whose one surface is covered with an insulating film and a surface in contact with the surface.
  • An object of the present invention is to provide a method of joining the two by resistance welding as possible.
  • the coated steel sheet welding method of the present invention has a metal plate covered with an insulating film on one side, a punch having a flat tip shape, and a die paired with the metal body from the side having no insulating film.
  • the metal body at the lower end portion of the inner surface of the punching hole is exposed to the insulating film forming surface side by punching and is energized by being brought into contact with the metal body to be joined and bonded by resistance welding.
  • the shape of the punch and die that are punched to expose the metal body at the lower end of the inner surface of the punching hole to the insulating film forming surface side is preferably circular.
  • the clearance between the punch and the die when punching the metal strip is preferably 60 to 320%, and more preferably 60 to 100%.
  • Clearance (%) ⁇ (Dd ⁇ Dp) / 2 ⁇ / t ⁇ 100 ... (1)
  • Dd Die diameter
  • Dp Punch diameter (mm)
  • t Metal plate thickness (mm)
  • the present invention it is possible to energize between a surface covered with an insulating film of a metal plate whose one surface is covered with an insulating film such as a coating film and a surface in contact with the surface, and a simple resistance welding method for both.
  • a metal structure can be easily constructed.
  • a wide contact area for energization can be secured, and subsequent resistance welding can be stably performed. For this reason, a high-quality metal structure excellent in corrosion resistance and appearance and having high bonding strength is provided at low cost.
  • the present inventors have various methods for joining the surface of the metal plate, which is covered with an insulating film on one side, and the surface in contact with the surface by contacting them by resistance welding. I have been studying it.
  • a die mold having a diameter considerably larger than the diameter of the punch of the mold to be punched is used, and punching is performed under such a condition that the shape of the so-called “bore” or “burl” becomes large.
  • the shape of the so-called “sag” or “burl” becomes large, and the metal body is exposed in a ring shape at the tip of the through hole. . If the metal body is exposed in a ring shape, the contact of the metal part with the mating metal member becomes a linear contact, and a current-carrying area wider than the conventional point-like contact can be secured and stable resistance welding becomes possible. .
  • the relationship between the diameter of the die and the diameter of the punch to be used is more preferable as the so-called “sag” or “burl” shape formed in the through hole after punching becomes larger. That is, the clearance is preferably relatively large. When the “burl” is small, the exposed ring-shaped metal body does not come out of the insulating film, and the metal body and the counterpart metal body are not sufficiently in contact with each other. However, if the clearance is too large, the range in which “sag” and “burl” are formed by punching becomes too wide to sufficiently expose the metal body.
  • the “sag” and “burl” are deformed by the pressurization of the electrode during welding, and the energizable part exposed by punching cannot contact the energizable part of the mating metal body to be joined. .
  • the punched metal plate remains unseparated from the punched metal plate and must be removed by manual work or machine operation before energization for bonding, which increases labor and leads to cost increase. Become.
  • the joint strength of resistance welding is proportional to the joint area.
  • the punch and die size for punching a metal plate are reduced. If the size is large, the bonding area can be increased.
  • the metal plate joined has a higher strength and is more stable when a portion that can be energized is exposed at the protrusion tip of the punched metal plate. If the line width of the metal ring exposed to the insulating film at the end of the through hole is made wider, more energizable portions can be exposed.
  • burring as shown in Fig. 3-b is effective.
  • the thickness of the protrusion decreases and the current-carrying area decreases. Resulting in. Therefore, the bonding area is reduced and the bonding strength is reduced. Details will be given in the description of Examples below, but when using a punch having a thin cylindrical portion and a thick cylindrical portion and burring the thick cylindrical portion, the clearance of the thick cylindrical portion relative to the clearance of the thin cylindrical portion
  • the ratio is preferably 0.9 or less. However, if the ratio is too small, the exposed metal portion decreases, so the lower limit is preferably about 0.5.
  • resistance welding it is preferable to employ a capacitor type projection welding method in which the welding time is short and the time during which the insulating film is affected by heat is short.
  • the energization method if one electrode is punched and the projection is pressurized from above, and the other steel plate to be joined is energized by the indirect method that can be pressurized from the same direction as the other electrode, the insulation film will be damaged. It becomes possible to join without any.
  • the lower end of the inner surface of the punched hole is punched by punching a metal body from the side where there is no insulating film with a punch having a flat tip shape and a die which is paired with a metal plate covered on one side with an insulating film. If the metal body is exposed to the insulating film forming surface side and brought into contact with the metal body to which the exposed portion is to be joined to enable energization, it can be easily bonded by resistance welding.
  • Example 1 As a material for projection welding, a primer steel plate was used in which a hot-dip galvanized steel plate having a length of 70 mm, a width of 40 mm, and a plate thickness of 0.8 mm was coated with an organic coating that is an insulating coating only on one side. And, in order to join the surface with the film and the surface without the film, the metal plate using the punch and die with various changes in clearance from the side without the film at the joint location of the primer steel plate on the side where the film comes to the bonding surface The body was punched out and a projection was provided. Table 1 shows the punch diameter (Dp), die diameter (Dd), and clearance used. The punch has a flat tip shape and a diameter as shown in Table 1.
  • the projections of the punched primer steel plates were overlapped so as to come into contact with a surface where there was no coating of the primer steel plates to be joined and could be energized, and joining was performed by capacitor type projection welding.
  • one of the electrodes is located above the projection, and the paired electrodes are in contact with the surface that can be energized without the coating of the steel plate to be joined without the projection on the same side as the other electrode (indirect Formula).
  • the electrode pressure was 0.4 kN and the voltage was 120V. Subsequently, the shear strength of the obtained joined body was measured. The results are shown in Table 2.
  • test No. 1 sparking occurred and bonding could not be performed. This is probably because the clearance between the punch and the die is small, so that the “burr” is small and the insulating film remains at the tip of the through hole after punching. Moreover, it was not able to join also in test No.8. It seems that the range of “burr” that was formed because the clearance was too wide was widened and deformed by pressurization of the electrode during welding, and the metal body could not be fully exposed. In other test Nos. 2 to 7, sufficient bonding was achieved. In Test Nos. 4 to 7, since the stamped metal piece remained, it was removed before pressure bonding. Further, in Test Nos. 2 to 7, the coated film at the joined portion was not peeled off and a good appearance was obtained. From this result, it can be seen that if the clearance is in the range of 60 to 320%, sufficient bonding strength and a good appearance without peeling of the coating film can be obtained.
  • Example 2 In the case described above, the punched metal piece remains as the clearance increases. Therefore, the clearance was set finely and the remaining state of the punched metal piece was observed. As the punch and die, those shown in Table 3 were used, and a metal plate was punched out in the same manner as in Example 1. Table 4 shows the remaining state of the punched metal pieces. From this result, it can be seen that if the clearance is 100% or less, the stamped metal piece does not remain when punched, and projection welding can be performed as it is without removing the punched metal piece before pressure bonding. Combined with the results of Example 1, it can be seen that if the clearance is 60 to 100%, it is not necessary to remove the punched metal piece, and projection welding can be performed easily.
  • Example 3 In the above, it has been described that burring as shown in FIG. 3B is effective in increasing the contact area during resistance welding. Therefore, as shown in FIG. 3B, when a punch having a thin cylindrical portion and a thick cylindrical portion is used and burring is performed on the thick cylindrical portion, the clearance of the thin cylindrical portion, the clearance of the thick cylindrical portion. I examined the effect of. As the punch and die, those shown in Tables 5 and 6 were used, and a metal plate was punched out in the same manner as in Example 1. As in Example 1, the electrode pressure and voltage were variously changed as shown in Table 7 and joined by projection welding. As for the state of the coating film, there was no peeling at the jointed part under all the test conditions, and a good appearance was obtained. Subsequently, the shear strength of the obtained joined body was measured. The results are also shown in Table 7. From the results in Table 7, the effectiveness of burring is understood.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Resistance Welding (AREA)
PCT/JP2011/060912 2010-05-17 2011-05-12 塗装鋼板の溶接方法 Ceased WO2011145506A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180024529.1A CN102917832B (zh) 2010-05-17 2011-05-12 涂覆钢板的焊接方法
AU2011256544A AU2011256544B2 (en) 2010-05-17 2011-05-12 Method for welding coated steel plate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-113021 2010-05-17
JP2010113021 2010-05-17

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WO2011145506A1 true WO2011145506A1 (ja) 2011-11-24

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CN (1) CN102917832B (enExample)
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WO (1) WO2011145506A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107471625A (zh) * 2016-06-08 2017-12-15 谢春发 将提把固定于贴覆有护膜层的钣金件上的结合方法

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JPWO2015087649A1 (ja) * 2013-12-11 2017-03-16 日立オートモティブシステムズ株式会社 内燃機関のバルブタイミング制御装置
JP6822345B2 (ja) * 2017-08-17 2021-01-27 日本製鉄株式会社 プロジェクション溶接方法及びプロジェクション溶接用電極
JP6749880B2 (ja) * 2017-10-13 2020-09-02 株式会社神戸製鋼所 ピアスエレメントの打ち込み方法、エレメント複合体、および溶接用部材
JP7281205B2 (ja) * 2020-08-19 2023-05-25 加賀工業株式会社 チェーンの製造方法
CN115502500A (zh) * 2022-09-13 2022-12-23 佛山华智新材料有限公司 具有多层结构的铝制品及其制作方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5475448A (en) * 1977-11-26 1979-06-16 Matsushita Refrigeration Precoated plate
JPS60137580A (ja) * 1983-12-26 1985-07-22 Mazda Motor Corp 絶縁層を有する鋼板へのナツト溶接方法
JPH02280975A (ja) * 1989-04-19 1990-11-16 Mitsubishi Electric Corp 抵抗溶接用プロジェクションおよびプロジェクション溶接方法
JPH03106518A (ja) * 1989-09-20 1991-05-07 Hitachi Ltd エレベータ補強部材の打抜き方法
JPH03243226A (ja) * 1990-02-22 1991-10-30 Mitsubishi Motors Corp バーリング加工用プレス装置と加工方法
JPH04138824A (ja) * 1990-09-29 1992-05-13 Yasuo Ono バーリング加工用ポンチ
JPH0654423U (ja) * 1993-01-13 1994-07-26 日新電機株式会社 バーリング加工用金型
JP2007090421A (ja) * 2005-09-30 2007-04-12 Nissan Motor Co Ltd バーリング加工型と加工方法

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CN100346919C (zh) * 2005-09-01 2007-11-07 上海交通大学 减振复合板油底壳双层电阻焊方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5475448A (en) * 1977-11-26 1979-06-16 Matsushita Refrigeration Precoated plate
JPS60137580A (ja) * 1983-12-26 1985-07-22 Mazda Motor Corp 絶縁層を有する鋼板へのナツト溶接方法
JPH02280975A (ja) * 1989-04-19 1990-11-16 Mitsubishi Electric Corp 抵抗溶接用プロジェクションおよびプロジェクション溶接方法
JPH03106518A (ja) * 1989-09-20 1991-05-07 Hitachi Ltd エレベータ補強部材の打抜き方法
JPH03243226A (ja) * 1990-02-22 1991-10-30 Mitsubishi Motors Corp バーリング加工用プレス装置と加工方法
JPH04138824A (ja) * 1990-09-29 1992-05-13 Yasuo Ono バーリング加工用ポンチ
JPH0654423U (ja) * 1993-01-13 1994-07-26 日新電機株式会社 バーリング加工用金型
JP2007090421A (ja) * 2005-09-30 2007-04-12 Nissan Motor Co Ltd バーリング加工型と加工方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107471625A (zh) * 2016-06-08 2017-12-15 谢春发 将提把固定于贴覆有护膜层的钣金件上的结合方法

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AU2011256544A1 (en) 2012-12-06
JP2012000668A (ja) 2012-01-05
CN102917832B (zh) 2016-01-27
JP5804765B2 (ja) 2015-11-04
CN102917832A (zh) 2013-02-06
AU2011256544B2 (en) 2014-11-06

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