CN104117749A - Rewelding method of aluminum alloy sealed solder joint - Google Patents
Rewelding method of aluminum alloy sealed solder joint Download PDFInfo
- Publication number
- CN104117749A CN104117749A CN201410396792.9A CN201410396792A CN104117749A CN 104117749 A CN104117749 A CN 104117749A CN 201410396792 A CN201410396792 A CN 201410396792A CN 104117749 A CN104117749 A CN 104117749A
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- CN
- China
- Prior art keywords
- solder joint
- rewelding
- joint defect
- starting point
- end point
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Classifications
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- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
Abstract
The invention relates to a rewelding method of an aluminum alloy sealed solder joint. The rewelding method of the aluminum alloy sealed solder joint includes the following steps that 1, the start point and the end point of a solder joint defect are marked according to the position of the solder joint defect; 2, a stirring needle is selected out; 3, the start point, the turning point and the end point for rewelding are marked; 4, removal is carried out, wherein remainders such as oil dirt and impurities between the start point and the end point for rewelding and within the range of 20 mm of the start point and the end point are removed according to a mechanical or chemical method; 5, rewelding is carried out in a stirring and friction welding mode, wherein the stirring needle is inserted into a workpiece from the start point for rewelding, the depth of the portion, inserted into the workpiece, of a shaft shoulder is not greater than the machining allowance of the workpiece, and then stirring and friction welding is carried out according to a track determined in the step 3; 6, detection is carried out, wherein the rewelded solder joint is detected, and if the solder joint leaks still, the steps 1 to 5 are carried out repeatedly until the solder joint is qualified. The rewelding method of the aluminum alloy sealed solder joint has the advantages that the process is simple, and the rewelding efficiency and the percent of pass are high.
Description
Technical field
The present invention relates to welding field, particularly a kind of rewelding method of aluminium alloy sealed welding seam.
Background technology
Soldering is the solder that utilizes liquidus curve lower than mother metal solidus, at the temperature higher than solder liquidus curve lower than mother metal solidus, utilize liquid solder at mother metal moistened surface, sprawl and joint filling in mother metal gap, mutually dissolve and diffusion with mother metal, realize the welding method connecting between part.The soldering of comparing with other welding method have distortion little, joint is smooth, fine and close, conventionally clamped one time can be realized the welding of all weld seams, production efficiency high is applicable to member accurate, complicated and that be made up of different materials very much, applies very extensive.But inconsistent because of the impurity of mother metal and solder and the inhomogeneities of tissue and play movement and joint mother metal surface state in industrial production, solder joint inevitably there will be pore, be mingled with and the shortcoming such as incomplete penetration, causes strength of joint and compactness to decline.
At present, brazing defect mainly adopts melting method to carry out rewelding, as argon tungsten-arc welding, metal argon arc welding, Laser Welding and electron beam welding etc.From the foregoing, brazing temperature is between the liquidus curve of solder and the solidus of mother metal, and melting temperature, can be far above the liquidus curve of solder so the melting temperature of mother metal of the same race is common higher than the liquidus curve of mother metal.In the time adopting melting method to carry out rewelding to brazing defect, the solder in former solder joint can participate in as impurity the metallurgical reaction in liquid molten bath on the one hand; On the other hand, the temperature in melting molten bath, far above the liquidus curve of solder that forms brazed seam, can cause solder reflow and loss in the adjacent area brazed seam of molten bath when rewelding.Even if so select the operating personnel that level of skill is very high in the time adopting melting method to carry out rewelding to solder joint, the qualification rate of its rewelding is common also very low.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, the rewelding method of the aluminium alloy sealed welding seam that a kind of technical process is simple, rewelding efficiency is high and qualification rate is high is provided.
Object of the present invention is achieved through the following technical solutions: a kind of rewelding method of aluminium alloy sealed welding seam, and it comprises the following steps:
S1, according to the position of solder joint defect, starting point and the end point of mark solder joint defect;
S2, selection mixing needle: the exterior contour of mixing needle is greater than the gap of welding point, and the length of mixing needle is not less than the distance of solder joint vertical direction, and is not more than whole by the thickness of rewelding workpiece;
Starting point, fold back point and the end point of S3, mark rewelding:
A, when solder joint defect end point or while closing on the edge of work, rewelding end point is that the intersection point of solder joint defect starting point and solder joint defect end point line or its extended line and the edge of work is offset 0.5 times～1 times mixing needle largest contours distance along solder joint defect starting point and solder joint defect end point line direction, and rewelding starting point is solder joint defect starting point is not less than mixing needle largest contours distance along solder joint defect end point and the skew of solder joint defect starting point line direction;
B, when solder joint defect starting point or while closing on the edge of work, its rewelding starting point is that the intersection point of solder joint defect end point and solder joint defect starting point line or its extended line and the edge of work is offset 0.5 times～1 times mixing needle largest contours distance along solder joint defect end point and solder joint defect starting point line direction, and rewelding end point is solder joint defect end point is not less than mixing needle largest contours distance along solder joint defect starting point and the skew of solder joint defect end point line direction;
C, the largest contours that exceedes mixing needle when the solder joint defect end-point distances edge of work apart from time, rewelding starting point is solder joint defect starting point is not less than mixing needle largest contours distance along solder joint defect end point and the skew of solder joint defect starting point line direction, rewelding is turned back and is a little not less than the largest contours distance of mixing needle for solder joint defect end point along solder joint defect starting point and the skew of solder joint defect end point line direction, rewelding end point is in rewelding starting point and between turning back a little, and be all not less than the largest contours distance of mixing needle apart from rewelding starting point and a distance of turning back,
S4, cleaning: with greasy dirt, impurity in 20mm width range between machinery or chemical method cleaning workpiece rewelding starting point and end point and around;
S5, the rewelding of employing friction stir welding: mixing needle is inserted to workpiece from rewelding starting point, and the degree of depth of shaft shoulder insertion workpiece is no more than the allowance of workpiece, then carries out friction stir welding according to the definite track of step S3;
S6, detection: detect reprocessing weld seam, if solder joint still leaks, repeat step S1～S5, until qualified.
After described step S5, also comprise a step with argon tungsten-arc welding repair welding keyhole.
The present invention has the following advantages:
1, rewelding qualification rate is high, and not limited by rewelding number of times, and that qualification rate is not only reprocessed in melting is low, and also has number of rewelding restriction, as standard HB5375 is defined in same position I, II level Weld Seam Repairation weldering number of times must not exceed 3 times.
2, after friction stir welding rewelding, can reprocess weld seam local location, as carried out melting in the positions such as rewelding keyhole, and its qualification rate is high more than directly carry out melting qualification rate on former solder joint.
3, equipment and process process is simple, and operating personnel's level of skill requires low.
4, rewelding efficiency is high, the cycle is short, cost is low.
Detailed description of the invention
The present invention will be further described below, but protection scope of the present invention is not limited to the following stated.
A rewelding method for aluminium alloy sealed welding seam, it comprises the following steps:
S1, according to the position of solder joint defect, starting point and the end point of mark solder joint defect;
S2, selection mixing needle: the exterior contour of mixing needle is greater than the gap of welding point, and the length of mixing needle is not less than the distance of solder joint vertical direction, and is not more than whole by the thickness of rewelding workpiece;
Starting point, fold back point and the end point of S3, mark rewelding:
A, when solder joint defect end point or while closing on the edge of work, rewelding end point is that the intersection point of solder joint defect starting point and solder joint defect end point line or its extended line and the edge of work is offset 0.5 times～1 times mixing needle largest contours distance along solder joint defect starting point and solder joint defect end point line direction, and rewelding starting point is solder joint defect starting point is not less than mixing needle largest contours distance along solder joint defect end point and the skew of solder joint defect starting point line direction;
B, when solder joint defect starting point or while closing on the edge of work, its rewelding starting point is that the intersection point of solder joint defect end point and solder joint defect starting point line or its extended line and the edge of work is offset 0.5 times～1 times mixing needle largest contours distance along solder joint defect end point and solder joint defect starting point line direction, and rewelding end point is solder joint defect end point is not less than mixing needle largest contours distance along solder joint defect starting point and the skew of solder joint defect end point line direction;
C, the largest contours that exceedes mixing needle when the solder joint defect end-point distances edge of work apart from time, rewelding starting point is solder joint defect starting point is not less than mixing needle largest contours distance along solder joint defect end point and the skew of solder joint defect starting point line direction, rewelding is turned back and is a little not less than the largest contours distance of mixing needle for solder joint defect end point along solder joint defect starting point and the skew of solder joint defect end point line direction, rewelding end point is in rewelding starting point and between turning back a little, and be all not less than the largest contours distance of mixing needle apart from rewelding starting point and a distance of turning back,
S4, cleaning: with greasy dirt, impurity in 20mm width range between machinery or chemical method cleaning workpiece rewelding starting point and end point and around;
S5, the rewelding of employing friction stir welding: mixing needle is inserted to workpiece from rewelding starting point, and the degree of depth of shaft shoulder insertion workpiece is no more than the allowance of workpiece, then carries out friction stir welding according to the definite track of step S3;
S6, detection: detect reprocessing weld seam, if solder joint still leaks, repeat step S1～S5, until qualified.
Friction stir welding is the solid-state method of attachment of one being proposed in 1991 by Britain's institute of welding, compare with traditional melt welding method, the advantages such as it is low that friction stir welding has welding temperature, and crystal grain is tiny, and the rear residual stress of good mechanical properties and welding and distortion are little.When agitating friction is welded in welding aluminum alloy, its welding temperature is not only lower than the solidus of mother metal, also lower than the liquidus curve of solder, so there is following technical characterstic while aluminium alloy brazing seam being carried out to rewelding with friction stir welding:
1) while seam with friction stir welding rewelding aluminium alloy brazing, can not form molten bath, can not produce the weld defect relevant with melting.
2) welding temperature, lower than the liquidus curve of solder, can not cause weld seam remelting and the loss of solder around.
3) after friction stir welding rewelding, can on the weld seam of rewelding, carry out melting, and its qualification rate is high more than directly carry out melting qualification rate on former solder joint.
4) friction stir welding has the effect of refined grain structure, and therefore its seam organization is finer and close, and mechanical property is more excellent.
5) process and welding process are simple.
In friction stir welding process, if rewelding starting point, not on workpiece, need be placed and a draw test plate (panel) in same level approximate with thickness of workpiece in initial point position, so that determine shaft shoulder insertion depth.
Claims (2)
1. a rewelding method for aluminium alloy sealed welding seam, is characterized in that: it comprises the following steps:
S1, according to the position of solder joint defect, starting point and the end point of mark solder joint defect;
S2, selection mixing needle: the exterior contour of mixing needle is greater than the gap of welding point, and the length of mixing needle is not less than the distance of solder joint vertical direction, and is not more than whole by the thickness of rewelding workpiece;
Starting point, fold back point and the end point of S3, mark rewelding:
A, when solder joint defect end point or while closing on the edge of work, rewelding end point is that the intersection point of solder joint defect starting point and solder joint defect end point line or its extended line and the edge of work is offset 0.5 times～1 times mixing needle largest contours distance along solder joint defect starting point and solder joint defect end point line direction, and rewelding starting point is solder joint defect starting point is not less than mixing needle largest contours distance along solder joint defect end point and the skew of solder joint defect starting point line direction;
B, when solder joint defect starting point or while closing on the edge of work, its rewelding starting point is that the intersection point of solder joint defect end point and solder joint defect starting point line or its extended line and the edge of work is offset 0.5 times～1 times mixing needle largest contours distance along solder joint defect end point and solder joint defect starting point line direction, and rewelding end point is solder joint defect end point is not less than mixing needle largest contours distance along solder joint defect starting point and the skew of solder joint defect end point line direction;
C, the largest contours that exceedes mixing needle when the solder joint defect end-point distances edge of work apart from time, rewelding starting point is solder joint defect starting point is not less than mixing needle largest contours distance along solder joint defect end point and the skew of solder joint defect starting point line direction, rewelding is turned back and is a little not less than the largest contours distance of mixing needle for solder joint defect end point along solder joint defect starting point and the skew of solder joint defect end point line direction, rewelding end point is in rewelding starting point and between turning back a little, and be all not less than the largest contours distance of mixing needle apart from rewelding starting point and a distance of turning back,
S4, cleaning: with greasy dirt, impurity in 20mm width range between machinery or chemical method cleaning workpiece rewelding starting point and end point and around;
S5, the rewelding of employing friction stir welding: mixing needle is inserted to workpiece from rewelding starting point, and the degree of depth of shaft shoulder insertion workpiece is no more than the allowance of workpiece, then carries out friction stir welding according to the definite track of step S3;
S6, detection: detect reprocessing weld seam, if solder joint still leaks, repeat step S1～S5, until qualified.
2. the rewelding method of a kind of aluminium alloy sealed welding seam according to claim 1, is characterized in that: after described step S5, also comprise a step with argon tungsten-arc welding repair welding keyhole.
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| CN201410396792.9A CN104117749B (en) | 2014-08-13 | 2014-08-13 | A kind of rewelding method of aluminium alloy sealed welding seam |
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| CN201410396792.9A CN104117749B (en) | 2014-08-13 | 2014-08-13 | A kind of rewelding method of aluminium alloy sealed welding seam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108259A (en) * | 2015-07-10 | 2015-12-02 | 西北矿冶研究院 | Method for compounding copper and aluminum dissimilar metal of zinc electrolysis cathode conductive head |
| CN114007792A (en) * | 2019-06-14 | 2022-02-01 | 松下知识产权经营株式会社 | Repair welding control device and repair welding control method |
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| CN1177667C (en) * | 1999-05-26 | 2004-12-01 | 株式会社日立制作所 | Repairing method for connector of friction stirring |
| JP2008221294A (en) * | 2007-03-14 | 2008-09-25 | Hitachi Ltd | Method and apparatus for repairing weld zone |
| JP2009106978A (en) * | 2007-10-30 | 2009-05-21 | Hitachi Ltd | Repairing method by friction stir welding |
| CN101966621A (en) * | 2010-11-04 | 2011-02-09 | 哈尔滨工业大学 | Electric arc preheating repair welding method for stir friction plug |
| JP2013107129A (en) * | 2011-11-24 | 2013-06-06 | Hitachi Ltd | Method for repairing welded part |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108259A (en) * | 2015-07-10 | 2015-12-02 | 西北矿冶研究院 | Method for compounding copper and aluminum dissimilar metal of zinc electrolysis cathode conductive head |
| CN114007792A (en) * | 2019-06-14 | 2022-02-01 | 松下知识产权经营株式会社 | Repair welding control device and repair welding control method |
| CN114007792B (en) * | 2019-06-14 | 2023-10-24 | 松下知识产权经营株式会社 | Repair welding control equipment and repair welding control method |
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| CN104117749B (en) | 2016-03-02 |
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