CN110539046A - Large-area lap joint resistance brazing method for copper or copper alloy thick plate - Google Patents
Large-area lap joint resistance brazing method for copper or copper alloy thick plate Download PDFInfo
- Publication number
- CN110539046A CN110539046A CN201910702428.3A CN201910702428A CN110539046A CN 110539046 A CN110539046 A CN 110539046A CN 201910702428 A CN201910702428 A CN 201910702428A CN 110539046 A CN110539046 A CN 110539046A
- Authority
- CN
- China
- Prior art keywords
- electrode
- copper
- copper alloy
- filler metal
- thick
- 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.)
- Pending
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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0004—Resistance soldering
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
the invention provides a large-area lap joint resistance brazing method for a copper or copper alloy thick plate, which comprises the following steps of welding a first copper or copper alloy plate and a second copper or copper alloy plate by using a resistance welding machine, wherein the resistance welding machine comprises a first electrode arm and a second electrode arm, a first electrode is arranged on one surface of the first electrode arm, which is opposite to the second electrode arm, and a second electrode is arranged on one surface of the second electrode arm, which is opposite to the first electrode arm: presetting foil-shaped brazing filler metal between a first copper or copper alloy thick plate and a second copper or copper alloy thick plate; and placing the first thick copper or copper alloy plate, the foil-shaped brazing filler metal and the second thick copper or copper alloy plate between a first electrode and a second electrode of a resistance welding machine, and starting the resistance welding machine to weld. The invention has high welding efficiency and good safety.
Description
Technical Field
The invention relates to a lap welding method for copper or copper alloy plates, in particular to a large-area lap resistance brazing method for copper or copper alloy thick plates.
Background
At present, flame brazing is mostly adopted for large-area lap joint of copper and copper alloy thick plates, and the large-area lap joint and the flame brazing enable welding to have the following defects: the welding quality is difficult to control, and the problem of drill penetration is easy to occur when the copper plates are overlapped in a large area; the safety of flame brazing is poor, and oxygen and acetylene bottles need to be stored in a welding site, so that explosion hidden danger exists; flame brazing has high requirements on the operating skill level of a welder; the flame welding time is long, the efficiency is low, and the welding cost is high; flux is generally used in flame brazing welding, part of flux has toxicity, and the flux is time-consuming and labor-consuming to remove.
Disclosure of Invention
The invention aims to provide the large-area lap resistance brazing method for the thick copper or copper alloy plate, which has high welding efficiency, good safety and lower requirement on the operating skill level of a welder, can well ensure the welding quality and reduce the welding cost.
according to one aspect of the invention, a method for large-area lap resistance brazing of a thick copper or copper alloy plate is provided, wherein a first copper or copper alloy plate and a second copper or copper alloy plate are welded by using a resistance welder, the resistance welder comprises a first electrode arm and a second electrode arm, a first electrode is arranged on one surface of the first electrode arm opposite to the second electrode arm, a second electrode is arranged on one surface of the second electrode arm opposite to the first electrode arm,
The method comprises the following specific steps:
a. And presetting foil-shaped brazing filler metal between the first thick copper or copper alloy plate and the second thick copper or copper alloy plate.
b. Placing the first thick copper or copper alloy plate, the foil-shaped brazing filler metal and the second thick copper or copper alloy plate between a first electrode and a second electrode of a resistance welding machine, wherein the contact surface of the first electrode and the first thick copper or copper alloy plate is parallel to the brazing surface, the contact surface of the second electrode and the second thick copper or copper alloy plate is parallel to the brazing surface,
c. Starting a resistance welder, wherein a first electrode and a second electrode respectively apply pressure to a first copper or copper alloy thick plate and a second copper or copper alloy thick plate to clamp a workpiece and a foil-shaped brazing filler metal between the first electrode and the second electrode, the foil-shaped brazing filler metal is melted by electrifying and heating, the molten foil-shaped brazing filler metal is filled in a lap joint surface under the pressure of the first electrode and the second electrode and the capillary action, the brazing filler metal can be supplemented around the lap joint surface by using a filamentous brazing filler metal during welding, and after the welding is finished, the first electrode and the second electrode keep applying pressure until a welding joint is cooled.
in some embodiments, the thickness of the first copper or copper alloy thick plate, the second copper or copper alloy thick plate can be varied according to the power of the resistance welder, and the thickness is generally more than 5 mm.
in some embodiments, the welding area of the first thick plate of copper or copper alloy and the second thick plate of copper or copper alloy is a lap area which varies according to the contact area of the electrode and the thick plate of copper or copper alloy, and the lap area is generally 20 × 20mm or more.
In some embodiments, the material of the first electrode and the second electrode is graphite, the material of the first electrode arm and the second electrode arm is copper alloy, and circulating cooling water is introduced into the first electrode arm and the second electrode arm during welding.
in some embodiments, the foil-shaped brazing filler metal is melted by electric heating, the molten foil-shaped brazing filler metal fills the joint surface under the pressure of the first electrode and the second electrode and under the capillary action, and the brazing filler metal can be supplemented around the joint surface by the wire-shaped brazing filler metal during welding.
In some embodiments, the foil-like braze and the wire-like braze are self-fluxing brazes that do not require a flux for soldering.
The invention has the beneficial effects that: the invention presets foil-shaped brazing filler metal between a copper or copper alloy thick plate and a copper or copper alloy thick plate. The foil-shaped brazing filler metal is self-fluxing brazing filler metal, and scaling powder is not needed in welding.
the resistance brazing of the invention has high welding efficiency, good safety and lower requirement on the operation skill level of a welder, and the invention uses the self-fluxing brazing filler metal without removing the brazing flux after the welding is finished, thereby well ensuring the welding quality and reducing the welding cost.
Drawings
FIG. 1 is a schematic diagram of a large area lap resistance brazing process for thick plates of copper or copper alloy in accordance with one embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
A method of lap resistance brazing a thick plate of copper or copper alloy in a large area includes welding a first copper or copper alloy plate 51 and a second copper or copper alloy plate 52 using a resistance welder including a first electrode arm 61 and a second electrode arm 62. The first electrode 51 is provided on the surface of the first electrode arm 61 facing the second electrode arm 62, and the second electrode 52 is provided on the surface of the second electrode arm 62 facing the first electrode arm 61.
the method comprises the following specific steps:
a. A foil-like brazing filler metal 3 is pre-placed between a first copper or copper alloy thick plate 1 and a second copper or copper alloy thick plate 2.
b. The first copper or copper alloy thick plate 1, the foil-shaped brazing filler metal 3 and the second copper or copper alloy thick plate 2 are placed between a first electrode 51 and a second electrode 52 of a resistance welding machine, the contact surface of the first electrode 51 and the first copper or copper alloy thick plate 1 is parallel to a brazing surface, and the contact surface of the second electrode 52 and the second copper or copper alloy thick plate 2 is parallel to the brazing surface.
c. Starting a resistance welder, wherein a first electrode 51 and a second electrode 52 respectively apply pressure to a first copper or copper alloy thick plate 1 and a second copper or copper alloy thick plate 2, a workpiece and a foil-shaped brazing filler metal 3 between the first electrode 51 and the second electrode 52 are clamped, the foil-shaped brazing filler metal 3 is melted by electrifying and heating, the molten foil-shaped brazing filler metal 3 is filled in a joint surface under the pressure and capillary action of the first electrode 51 and the second electrode 52, the brazing filler metal can be supplemented around the joint surface by using a wire-shaped brazing filler metal 4 during welding, and after the welding is finished, the first electrode 51 and the second electrode 52 keep applying pressure until a welding joint is cooled.
The thickness of the first thick copper or copper alloy plate 1 and the second thick copper or copper alloy plate 2 can be changed according to the power of the resistance welding machine, the thickness is generally more than 5mm, the overlapping area is the welding area of the first thick copper or copper alloy plate 1 and the second thick copper or copper alloy plate 2, the overlapping area is changed according to the contact area of the electrode and the thick copper or copper alloy plate, and the overlapping area is generally more than 20 x 20 mm. The foil-like brazing filler metal 3 and the wire-like brazing filler metal 4 are self-fluxing brazing filler metals, and no flux is required during welding. The electrode 5 is made of graphite, the electrode arm 6 is made of copper alloy, and circulating cooling water is introduced into the electrode arm 6 during welding. The foil-shaped brazing filler metal 3 is melted by electrifying and heating, the faying surface is filled with the melted foil-shaped brazing filler metal 3 under the pressure of the first electrode 51 and the second electrode 52 and the capillary action, and the brazing filler metal can be supplemented around the faying surface by the filamentous brazing filler metal during welding. During welding, the temperature is controlled, the solder is completely melted, and the thick copper or copper alloy plate is not melted. After welding is completed, the electrode is kept pressed until the welded joint is cooled.
The above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (6)
1. A large-area lap resistance brazing method for thick copper or copper alloy plates is characterized in that,
Welding a first copper or copper alloy plate and a second copper or copper alloy plate by using a resistance welding machine, wherein the resistance welding machine comprises a first electrode arm and a second electrode arm, a first electrode is arranged on one surface of the first electrode arm opposite to the second electrode arm, a second electrode is arranged on one surface of the second electrode arm opposite to the first electrode arm,
The method comprises the following specific steps:
a. Presetting foil-shaped brazing filler metal between the first thick copper or copper alloy plate and the second thick copper or copper alloy plate;
b. Placing the first thick copper or copper alloy plate, the foil-shaped brazing filler metal and the second thick copper or copper alloy plate between a first electrode and a second electrode of a resistance welding machine, wherein the contact surface of the first electrode and the first thick copper or copper alloy plate is parallel to the brazing surface, and the contact surface of the second electrode and the second thick copper or copper alloy plate is parallel to the brazing surface;
c. Starting a resistance welder, wherein a first electrode and a second electrode respectively apply pressure to a first copper or copper alloy thick plate and a second copper or copper alloy thick plate to clamp a workpiece and a foil-shaped brazing filler metal between the first electrode and the second electrode, the foil-shaped brazing filler metal is melted by electrifying and heating, the molten foil-shaped brazing filler metal is filled in a lap joint surface under the pressure of the first electrode and the second electrode and the capillary action, the brazing filler metal is supplemented around the lap joint surface by a filamentous brazing filler metal during welding, and after the welding is finished, the first electrode and the second electrode keep applying pressure until a welding joint is cooled.
2. The method according to claim 1, wherein the thickness of the first thick copper or copper alloy plate, the second thick copper or copper alloy plate is variable according to the power of the resistance welder, and the thickness is generally 5mm or more.
3. the method according to claim 1, wherein the welding area of the first and second thick copper or copper alloy plates is a lapping area which varies according to the contact area between the electrode and the thick copper or copper alloy plate, and the lapping area is generally 20 x 20mm or more.
4. The large area lap resistance brazing method according to claim 1, wherein the first electrode and the second electrode are made of graphite, the first electrode arm and the second electrode arm are made of copper alloy, and circulating cooling water is introduced into the first electrode arm and the second electrode arm during welding.
5. The large-area lap resistance brazing method for copper or copper alloy slabs according to claim 3, wherein said foil-like brazing filler metal is melted by electrical heating, the melted foil-like brazing filler metal fills the lap joint surface under the pressure of the first electrode and the second electrode and the capillary action, and the brazing filler metal can be supplemented around the lap joint surface by a wire-like brazing filler metal during welding.
6. the method for large area lap resistance brazing of a copper or copper alloy slab according to claim 3, wherein said foil-like filler metal and wire-like filler metal are self-fluxing filler metals, and no flux is required for the welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910702428.3A CN110539046A (en) | 2019-07-31 | 2019-07-31 | Large-area lap joint resistance brazing method for copper or copper alloy thick plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910702428.3A CN110539046A (en) | 2019-07-31 | 2019-07-31 | Large-area lap joint resistance brazing method for copper or copper alloy thick plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110539046A true CN110539046A (en) | 2019-12-06 |
Family
ID=68709935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910702428.3A Pending CN110539046A (en) | 2019-07-31 | 2019-07-31 | Large-area lap joint resistance brazing method for copper or copper alloy thick plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110539046A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289810A (en) * | 2021-11-30 | 2022-04-08 | 江苏中车电机有限公司 | Brazing method of aluminum or aluminum alloy plate |
| CN114346518A (en) * | 2021-12-03 | 2022-04-15 | 中车永济电机有限公司 | Application of flux-cored solder and brazing method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59212166A (en) * | 1983-05-16 | 1984-12-01 | Seiichiro Miyata | Brazing method of two members |
| DE19741557C1 (en) * | 1997-09-20 | 1999-02-04 | Karl Jungbecker Gmbh & Co | Applying solder to electromechanical precision components made of electroconductive materials |
| CN101856757A (en) * | 2010-06-10 | 2010-10-13 | 重庆理工大学 | Powder medium diffusion reaction resistance soldering method of aluminum alloy |
| CN102489813A (en) * | 2011-12-20 | 2012-06-13 | 山东大学 | Vacuum active brazing process of molybdenum-copper alloys and stainless steel |
| CN104002004A (en) * | 2014-06-19 | 2014-08-27 | 镇江四洋特种金属材料制造有限公司 | Thick metal plate large-area butt joint braze welding method |
| CN104259610A (en) * | 2014-08-27 | 2015-01-07 | 郑州机械研究所 | Resistance soldering method using graphite electrode and resistance soldering device |
| CN104668688A (en) * | 2015-03-20 | 2015-06-03 | 湘潭电机股份有限公司 | Vacuum resistive brazing method for lap piece |
| CN106392235A (en) * | 2016-11-21 | 2017-02-15 | 郑州航空工业管理学院 | Diversified heating method for vacuum diffusion brazing furnace |
| CN108161157A (en) * | 2017-12-28 | 2018-06-15 | 江苏菲尔克斯换热科技有限公司 | A kind of mixing solder brazing method and heat exchanger |
-
2019
- 2019-07-31 CN CN201910702428.3A patent/CN110539046A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59212166A (en) * | 1983-05-16 | 1984-12-01 | Seiichiro Miyata | Brazing method of two members |
| DE19741557C1 (en) * | 1997-09-20 | 1999-02-04 | Karl Jungbecker Gmbh & Co | Applying solder to electromechanical precision components made of electroconductive materials |
| CN101856757A (en) * | 2010-06-10 | 2010-10-13 | 重庆理工大学 | Powder medium diffusion reaction resistance soldering method of aluminum alloy |
| CN102489813A (en) * | 2011-12-20 | 2012-06-13 | 山东大学 | Vacuum active brazing process of molybdenum-copper alloys and stainless steel |
| CN104002004A (en) * | 2014-06-19 | 2014-08-27 | 镇江四洋特种金属材料制造有限公司 | Thick metal plate large-area butt joint braze welding method |
| CN104259610A (en) * | 2014-08-27 | 2015-01-07 | 郑州机械研究所 | Resistance soldering method using graphite electrode and resistance soldering device |
| CN104668688A (en) * | 2015-03-20 | 2015-06-03 | 湘潭电机股份有限公司 | Vacuum resistive brazing method for lap piece |
| CN106392235A (en) * | 2016-11-21 | 2017-02-15 | 郑州航空工业管理学院 | Diversified heating method for vacuum diffusion brazing furnace |
| CN108161157A (en) * | 2017-12-28 | 2018-06-15 | 江苏菲尔克斯换热科技有限公司 | A kind of mixing solder brazing method and heat exchanger |
Non-Patent Citations (2)
| Title |
|---|
| 伍德盖特: "《机器软钎焊手册》", 31 January 1990, 机械工业出版社 * |
| 美国金属学会: "《金属手册 第8版 第6卷 焊接与钎焊》", 30 November 1984, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289810A (en) * | 2021-11-30 | 2022-04-08 | 江苏中车电机有限公司 | Brazing method of aluminum or aluminum alloy plate |
| CN114346518A (en) * | 2021-12-03 | 2022-04-15 | 中车永济电机有限公司 | Application of flux-cored solder and brazing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101856757B (en) | Powder medium diffusion reaction resistance soldering method of aluminum alloy | |
| CN101468419B (en) | Induction and electrical arc composite heat source stud welding method | |
| CN101885095B (en) | Powder medium diffusion reaction resistance brazing method of magnesium alloy | |
| CN103252568B (en) | A kind of for filling spot welding stainless steel high-entropy alloy powder and the stainless process of a kind of high-entropy alloy powder filling spot welding | |
| CN101844260A (en) | Method and device for performing electric magnetization resistance welding-braze welding compounding on dissimilar materials | |
| CN104002004A (en) | Thick metal plate large-area butt joint braze welding method | |
| CN108296584B (en) | Titanium-steel plate butt joint double-heat-source low-heat-input brazing method | |
| CN110539046A (en) | Large-area lap joint resistance brazing method for copper or copper alloy thick plate | |
| CN107570900B (en) | High-frequency-electric arc hybrid welding method | |
| CN106392359A (en) | Method for controlling welding cracks of ultrathin tantalum and molybdenum dissimilar materials | |
| CN104289781A (en) | Welding method of electric contact | |
| CN110860796B (en) | Aluminum alloy small-current arc online cleaning auxiliary laser filler wire welding method | |
| CN110560877B (en) | Method for welding multi-layer aluminum and aluminum alloy strips | |
| CN1445044A (en) | Method for red copper transition welding without preheating metal alloy | |
| CN109175562B (en) | TIG brazing process for copper-aluminum dissimilar metal | |
| KR100811920B1 (en) | One side welding method of butt-welded joints | |
| CN103521866B (en) | The copper wire lead resistance brazing technology method of the controlled single-side double-point of a kind of welding temperature | |
| CN105345230A (en) | Argon arc brazing method for patch welding brazing seams of rotor connecting ring of shielding motor | |
| CN102672302A (en) | Fracture welding and crack repairing method of band saw blade and matched welding tool set | |
| CN103978288B (en) | A kind of method of the TIG-MIG welding of connecting | |
| CN111774701A (en) | Method for welding stainless steel butt-joint plate with thickness of 0.5mm by manual pulse tungsten electrode argon arc welding | |
| CN1285440C (en) | Micro melting soldering method of argon-shielded tungsten arc welding for thick plate of red copper without warming-up | |
| CN100478111C (en) | Method for inert gas-shielded soldering Bashi alloying tungsten electrode | |
| CN103464855B (en) | The large area carbide alloy method for welding of standing wave constraint | |
| CN105798411A (en) | Ultrasonic resistance Composite butt brazing method for aluminum alloy and insulated sliding welding device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191206 |
|
| RJ01 | Rejection of invention patent application after publication |