CN104668688A - Vacuum resistive brazing method for lap piece - Google Patents
Vacuum resistive brazing method for lap piece Download PDFInfo
- Publication number
- CN104668688A CN104668688A CN201510123549.4A CN201510123549A CN104668688A CN 104668688 A CN104668688 A CN 104668688A CN 201510123549 A CN201510123549 A CN 201510123549A CN 104668688 A CN104668688 A CN 104668688A
- Authority
- CN
- China
- Prior art keywords
- vacuum
- bridge piece
- brazing
- solder
- treat
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- 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.)
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- 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
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
Abstract
The invention relates to a vacuum resistive brazing method for a lap piece. The vacuum resistive brazing method comprises the following steps: 1, cleaning a to-be-lapped piece; 2, fixing brazing filler metal on the contact surface of the to-be-lapped piece by using upper and lower electrodes; 3, vacuumizing a brazing furnace, and putting the to-be-lapped piece fixed with the brazing filler metal into the vacuum brazing furnace, wherein the internal vacuum degree of the vacuum brazing furnace is 1.0*10<-1>-1.0*10<-4>Pa by vacuumizing; 4, heating the brazing filler metal until the temperature is higher than the welding point of the brazing filler metal by 30-80 DEG C; 5, cooling a resistive brazing piece, and discharging the resistive brazing piece from the furnace. The to-be-lapped piece to be resistively brazed is assembled and then is arranged in a vacuum environment, the influence on the to-be-lapped piece caused by air in the environment in the resistive brazing process is eliminated, and air conditions caused by air holes in the resistive brazing process are eliminated; meanwhile, the brazing surface is pollution-free in the welding process, and the welded brazing surface is pollution-free.
Description
Technical field
The present invention relates to a kind of vacuum resistance method for welding of bridge piece.
Background technology
The resistance brazing method of current bridge piece is generally and with upper/lower electrode, solder is fixed on two pieces and treats between the contact surface of bridge piece, after workpiece is passed into big current, makes to be placed on two pieces and welds together after the brazing filler metal melts between the workpiece overlapped.In order to prevent producing oxide in brazing filler metal melts process, at present, the general sheet solder of band flux ingredients or the direct sheet solder of employing not with scaling powder of adopting carries out resistance brazing, because the junction to be welded of two workpiece and sheet solder are all difficult to completely smooth, thus make between bridge piece and sheet solder, to there is partial air and cannot discharge, finally be present in brazed seam, cause brazed seam to there is spilehole or solder oxidation, this will reduce the quality of brazed seam.
Summary of the invention
The object of the invention is to overcome above defect, provide a kind of and reduce the vacuum resistance method for welding that brazed seam spilehole improves the bridge piece of brazing quality.
Technical scheme of the present invention is, a kind of vacuum resistance method for welding of bridge piece, and it comprises the following steps:
Step 1, treat that bridge piece is cleared up, remove greasy dirt, the oxide on workpiece and solder surface, ensure the clean and dry of workpiece and solder;
Step 2, treat that bridge piece and solder are fixed, with upper/lower electrode solder is fixed on and treats on the contact surface of bridge piece;
Step 3, soldering oven vacuumize, and treat that weldment loads in vacuum brazing furnace, vacuumize what be fixed with solder and make vacuum in vacuum brazing furnace be 1.0 × 10
-1pa ~ 1.0 × 10
-4pa;
Step 4, resistance brazing, pass into electric current between upper/lower electrode, utilizes upper/lower electrode and treat the heat that produces between bridge piece by the heating temperatures of solder to exceeding solder fusing point 30 DEG C-80 DEG C;
The cooling of step 5, resistance brazing part is come out of the stove, and disconnects the electric current between upper/lower electrode, and stop heating, after brazed seam solidifies completely, resistance brazing part is cooled to after below 200 DEG C and comes out of the stove.
In order to shorten coming out of the stove the time of resistance brazing part, described step 5, after brazed seam solidifies completely, is filled with high-purity N in soldering oven
2or inert gas accelerates the cooling of workpiece in stove.
In order to improve the quality of brazed seam, come out of the stove after affiliated step 5 resistance brazing part is cooled to room temperature.
Preferably, described in treat that the material of bridge piece is red copper, in the vacuum brazing furnace of described step 3, vacuum is 1.0 × 10
-2pa ~ 1.0 × 10
-4pa.
Preferably, described in treat that the material of bridge piece is aluminium alloy, in the vacuum brazing furnace of described step 3, vacuum is 1.0 × 10
-1pa ~ 1.0 × 10
-3pa.
The invention has the beneficial effects as follows, the present invention provides a kind of excellent vacuum soldering process method to the resistance brazing of bridge piece, by will treating that bridge piece assembles and being placed in the environment of vacuum of resistance brazing be treated, the air eliminated in resistance brazing process in environment is treated the impact of bridge piece and is eliminated the air conditions that in resistance brazing process, pore produces, simultaneously because braze surface in welding process and postwelding pollution-free, its solder can not be with scaling powder, improve the quality of weld seam, brazing product intensity is large, flat appearance, brazing layer thickness and thermal stress distribution even.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention structural representation.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Embodiment 1, with reference to accompanying drawing, a kind of vacuum resistance method for welding of bridge piece, it treats that the material of bridge piece is red copper, and it comprises the following steps:
Step 1, treat that bridge piece is cleared up, greasy dirt, the oxide on bridge piece 3 in removing, lower bridge piece 6 and solder 5 surface, in guarantee, bridge piece 3, lower bridge piece 6 and solder 5 is clean and dry;
Step 2, treat that bridge piece and solder are fixed, in the middle of the contact surface with electrode 4 and bottom electrode 7 solder 5 being fixed on upper bridge piece 3, lower bridge piece 6;
Step 3, soldering oven vacuumize, and treat that bridge piece loads in vacuum brazing furnace 2, utilize what be fixed with solder 5 compressor 1 to vacuumize and make vacuum in vacuum brazing furnace 2 be 1.0 × 10
-2pa ~ 1.0 × 10
-4pa;
Step 4, resistance brazing, pass into electric current between top electrode 4 and bottom electrode 7, between the upper bridge piece 3 utilizing top electrode 4 and bottom electrode 7 to be in contact with it, lower bridge piece 6 produce heat by the heating temperatures of solder 5 to exceeding solder 5 fusing point 30 DEG C-80 DEG C;
The cooling of step 5, resistance brazing part is come out of the stove, and disconnects the electric current between top electrode 4 and bottom electrode 7, stops heating, after brazed seam solidifies completely, in soldering oven 2, is filled with high-purity N
2or inert gas accelerates the cooling of workpiece in stove, comes out of the stove after upper bridge piece 3 and lower bridge piece 6 are cooled to room temperature.
Embodiment 2, with reference to accompanying drawing, a kind of vacuum resistance method for welding of bridge piece, it treats that the material of bridge piece is aluminium alloy, and except in the vacuum brazing furnace 2 in step 3, vacuum is 1.0 × 10
-1pa ~ 1.0 × 10
-3outside Pa, all the other are consistent with embodiment 1.
Claims (7)
1. a vacuum resistance method for welding for bridge piece, it is characterized in that, it comprises the following steps:
Step 1, treat that bridge piece is cleared up, remove greasy dirt, the oxide on workpiece and solder surface, ensure the clean and dry of workpiece and solder;
Step 2, treat that bridge piece and solder are fixed, with upper/lower electrode solder is fixed on and treats on the contact surface of bridge piece;
Step 3, soldering oven vacuumize, and treat that weldment loads in vacuum brazing furnace, vacuumize what be fixed with solder and make vacuum in vacuum brazing furnace be 1.0 × 10
-1pa ~ 1.0 × 10
-4pa;
Step 4, resistance brazing, pass into electric current between upper/lower electrode, utilizes upper/lower electrode and treat the heat that produces between bridge piece by the heating temperatures of solder to exceeding solder fusing point 30 DEG C-80 DEG C;
The cooling of step 5, resistance brazing part is come out of the stove, and disconnects the electric current between upper/lower electrode, and stop heating, after brazed seam solidifies completely, resistance brazing part is cooled to after below 200 DEG C and comes out of the stove.
2. the vacuum resistance method for welding of a kind of bridge piece according to claim 1, is characterized in that, affiliated step 5, after brazed seam solidifies completely, is filled with high-purity N in soldering oven
2or inert gas accelerates the cooling of workpiece in stove.
3. according to the vacuum resistance method for welding of a kind of bridge piece according to claim 1 or claim 2, it is characterized in that, come out of the stove after described step 5 resistance brazing part is cooled to room temperature.
4., according to the vacuum resistance method for welding of a kind of bridge piece according to claim 1 or claim 2, it is characterized in that, described in treat that the material of bridge piece is red copper, in the vacuum brazing furnace of described step 3, vacuum is 1.0 × 10
-2pa ~ 1.0 × 10
-4pa.
5. the vacuum resistance method for welding of a kind of bridge piece according to claim 3, is characterized in that, described in treat that the material of bridge piece is red copper, in the vacuum brazing furnace of described step 3, vacuum is 1.0 × 10
-2pa ~ 1.0 × 10
-4pa.
6., according to the vacuum resistance method for welding of a kind of bridge piece according to claim 1 or claim 2, it is characterized in that, described in treat that the material of bridge piece is aluminium alloy, in the vacuum brazing furnace of described step 3, vacuum is 1.0 × 10
-1pa ~ 1.0 × 10
-3pa.
7. the vacuum resistance method for welding of a kind of bridge piece according to claim 3, is characterized in that, described in treat that the material of bridge piece is aluminium alloy, in the vacuum brazing furnace of described step 3, vacuum is 1.0 × 10
-1pa ~ 1.0 × 10
-3pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510123549.4A CN104668688A (en) | 2015-03-20 | 2015-03-20 | Vacuum resistive brazing method for lap piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510123549.4A CN104668688A (en) | 2015-03-20 | 2015-03-20 | Vacuum resistive brazing method for lap piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104668688A true CN104668688A (en) | 2015-06-03 |
Family
ID=53304558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510123549.4A Pending CN104668688A (en) | 2015-03-20 | 2015-03-20 | Vacuum resistive brazing method for lap piece |
Country Status (1)
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| CN (1) | CN104668688A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105269161A (en) * | 2014-07-08 | 2016-01-27 | 通用汽车环球科技运作有限责任公司 | Current schedule for optimized reaction metallurgical joining |
| CN106238845A (en) * | 2016-08-18 | 2016-12-21 | 哈尔滨电气动力装备有限公司 | Core main pump motor stator coil end socket resistance brazing technology and equipment thereof |
| CN106270865A (en) * | 2016-08-30 | 2017-01-04 | 郑州机械研究所 | A kind of lightweight copper component resistance brazing device and method |
| CN107081495A (en) * | 2017-07-03 | 2017-08-22 | 长江师范学院 | A kind of method for welding of metal system |
| CN110369817A (en) * | 2018-04-13 | 2019-10-25 | 通用汽车环球科技运作有限责任公司 | Point of resistance soldering has the job stacking of one or more thin gauge steel workpieces |
| CN110539046A (en) * | 2019-07-31 | 2019-12-06 | 江苏中车电机有限公司 | Large-area lap joint resistance brazing method for copper or copper alloy thick plate |
| CN111085768A (en) * | 2019-12-31 | 2020-05-01 | 东莞材料基因高等理工研究院 | Low-temperature diffusion bonding method for aluminum-based metal material |
| CN114211072A (en) * | 2022-02-23 | 2022-03-22 | 中机智能装备创新研究院(宁波)有限公司 | Resistance brazing device and method in negative pressure environment |
| 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 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105269161A (en) * | 2014-07-08 | 2016-01-27 | 通用汽车环球科技运作有限责任公司 | Current schedule for optimized reaction metallurgical joining |
| US10240222B2 (en) | 2014-07-08 | 2019-03-26 | GM Global Technology Operations LLC | Current schedule for optimized reaction metallurgical joining |
| CN106238845A (en) * | 2016-08-18 | 2016-12-21 | 哈尔滨电气动力装备有限公司 | Core main pump motor stator coil end socket resistance brazing technology and equipment thereof |
| CN106270865A (en) * | 2016-08-30 | 2017-01-04 | 郑州机械研究所 | A kind of lightweight copper component resistance brazing device and method |
| CN106270865B (en) * | 2016-08-30 | 2019-06-18 | 郑州机械研究所有限公司 | A kind of lightweight copper component resistance brazing device and method |
| CN107081495A (en) * | 2017-07-03 | 2017-08-22 | 长江师范学院 | A kind of method for welding of metal system |
| CN110369817A (en) * | 2018-04-13 | 2019-10-25 | 通用汽车环球科技运作有限责任公司 | Point of resistance soldering has the job stacking of one or more thin gauge steel workpieces |
| CN110369817B (en) * | 2018-04-13 | 2021-12-07 | 通用汽车环球科技运作有限责任公司 | Resistance spot brazing of a workpiece stack having one or more thin gauge steel workpieces |
| CN110539046A (en) * | 2019-07-31 | 2019-12-06 | 江苏中车电机有限公司 | Large-area lap joint resistance brazing method for copper or copper alloy thick plate |
| CN111085768A (en) * | 2019-12-31 | 2020-05-01 | 东莞材料基因高等理工研究院 | Low-temperature diffusion bonding method for aluminum-based metal material |
| 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 |
| CN114211072A (en) * | 2022-02-23 | 2022-03-22 | 中机智能装备创新研究院(宁波)有限公司 | Resistance brazing device and method in negative pressure environment |
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Application publication date: 20150603 |