CN101318255A - Method of manufacturing inserted aluminum pipe welded joint - Google Patents
Method of manufacturing inserted aluminum pipe welded joint Download PDFInfo
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- CN101318255A CN101318255A CNA2007101073781A CN200710107378A CN101318255A CN 101318255 A CN101318255 A CN 101318255A CN A2007101073781 A CNA2007101073781 A CN A2007101073781A CN 200710107378 A CN200710107378 A CN 200710107378A CN 101318255 A CN101318255 A CN 101318255A
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Abstract
The invention relates to a preparation method of spliced type aluminum pipe welding joints, which is characterized in that a welding part at the pipe end of a hard state aluminum pipe is processed to be a conical welding surface; a welding mandrel is inserted into the hard state aluminum pipe in advance before the welding; the hard state aluminum pipe with the inserted welding mandrel, a soft state aluminum pipe are fixed at a movable electrode and a fixed electrode respectively; the electrodes are moved to drive the hard state aluminum pipe to be inserted into the soft state aluminum pipe movably, meanwhile, the electrodes are electrified until the conical welding surface of the hard state aluminum enters the soft state aluminum pipe completely. The welding mandrel can improve the working pressure of the aluminum pipe joints and the roundness of the soft state aluminum pipe during the propelling process of the welding initial stage; the welding mandrel can restrict the overflowing of spattering matters during the electrifying welding process.
Description
Technical field
The present invention relates to a kind of preparation method of inserted aluminum pipe welded joint, this method can be finished the high compactness welding between the thin-wall aluminium pipe, forms the inserted aluminum pipe welded joint of novel structure, good quality, has outstanding feature.
Background technology
Cold-producing medium is the operation material that carries out kind of refrigeration cycle in refrigerating plant, in the circulating pipe system of cold-producing medium as year cold medium, refrigeration is relevant with the quantity of cold-producing medium, cold-producing medium recycles in system, the seepage of any trace, all will cause the internal system cold-producing medium to scatter and disappear, and influence the refrigeration of product, finally will make refrigeration product forfeiture refrigeration performance.So guarantee the compactness of pipe-line system, especially the compactness of pipeline welding point is very important.
At refrigeration industry, aluminum pipe is the ideal material of copper pipe instead, more and more attract much attention, but the welding efficiency between the aluminum pipe is very low, adopting at present the argon arc welding method welding between the aluminum pipe is to generally acknowledge best welding manner, but it is just like being not suitable for shortcomings such as tubule, light-wall pipe, joint location be restricted; Can also adopt NOCOLOK to finish connection between the aluminum pipe as the method for welding of brazing flux, but NOCOLOK soldering processes complexity, operation easier is big, and too high active temperature especially is unfavorable for having the automation welding of the aluminum evaporimeter of fin and intensive pipeline.
In a word, aluminium especially at refrigeration industry, is difficult to realize high efficiency mechanization welding owing to form oxide-film easily, has limited the application of aluminum pipe at refrigeration industry.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of preparation method who produces inserted aluminum pipe welded joint.The present invention is suitable for the mechanization welding, and welding quality is good.
The problems referred to above are to solve like this: get each one of hard attitude aluminum pipe, soft attitude aluminum pipe.At first the welding position with hard attitude aluminum pipe pipe end is processed into the taper solder side, insert in the soft attitude aluminum pipe for ease of hard attitude aluminum pipe, the external diameter at thin place of taper solder side should be slightly less than soft attitude aluminum pipe internal diameter, insert a welding plug during welding in advance in hard attitude aluminum pipe, the top external diameter of this welding plug and attitude aluminum pipe taper the solder side firmly internal diameter at thin place match.Soft attitude aluminum pipe port must not processed, and diameter and wall thickness remain unchanged.The hard attitude aluminum pipe, the soft attitude aluminum pipe that insert the welding plug are separately fixed on the float electrode and fixed electrode of resistor pressure bonding machine, and the controlled pressure bonding machine moves in the soft attitude aluminum pipe of insertion hard attitude aluminum pipe, in the grafting process, utilize the taper solder side of hard attitude aluminum pipe that the oxide layer on the soft attitude aluminum pipe inwall is ground away, simultaneously to electrifying electrodes, under the effect of resistance heat, soft attitude aluminum pipe rapidly fusing enters into soft attitude aluminum pipe fully until the taper solder side of hard attitude aluminum pipe and goes to the back to disconnect the source of welding current.
The invention has the beneficial effects as follows:
The welding plug can improve the aluminium tube joint operating pressure in the progradation of welding incipient stage, improve soft attitude aluminum pipe circularity; The restriction splash overflows in the energising welding process.
After disconnecting the source of welding current, can continue to advance welding plug 1, the welding point internal diameter is enlarged, extract welding plug 1 then rapidly out, finish welding.The thinnest place of hard attitude aluminum pipe taper surface can be enlarged like this, simultaneously can will there be the welding point of rosin joint to draw back, Automatic sieve is selected substandard product, improves the bending resistance at welding point place, the diameter at increasing welding point place, and great quality accident does not take place for raising flow, the product of guaranteeing to dispatch from the factory.
For improving welding quality, the taper solder side of above-mentioned hard attitude aluminum pipe can be polyline shaped, and the broken line diameter should be greater than soft attitude aluminum pipe internal diameter, does like this and has not only reduced the resistance of soft attitude aluminum pipe when inserting hard attitude aluminum pipe, help preventing hard attitude aluminum pipe deformation instability, improve welding fusion area and quality.
For improving welding quality, can establish mosaic block in the welding position of fixed electrode, traveling electrode, mosaic block is made of the material of high-fire resistance and low heat transfer efficient.
For improving the clamping effect of fixed electrode, can on the groove of the welding position of fixed electrode end mosaic block, carve the waveform lines in advance, the nominal diameter of this groove is identical with soft attitude aluminum pipe external diameter, and minimum diameter is more smaller than soft attitude aluminum pipe.Owing to increase the waveform lines, and minimum diameter is more smaller than soft attitude aluminum pipe external diameter, therefore can clamp soft attitude aluminum pipe, make its difficult drop-off.The aluminium liquid of fusing can be filled in the waveform lines when welding simultaneously, can guarantee that the external diameter of welding point welding position is identical with soft attitude aluminum pipe.
For improving welding quality, before the welding, the hard aluminum tube surfaces can be stained with brazing flux and weld, remove the oxide of hard aluminum tube surfaces down to guarantee high temperature.
Description of drawings
Fig. 1 plug-in type copper aluminum pipe welded joint welding schematic diagram
The local enlarged diagram of Fig. 2 mosaic block groove
The hard aluminum pipe of Fig. 3 band polyline shaped taper surface
Description of symbols among the figure:
The specific embodiment
Specific embodiment 1:
With reference to Fig. 1, one embodiment of the present invention are: choose identical hard attitude aluminum pipe 2 of external diameter and soft attitude aluminum pipe 12, the welding position of hard attitude aluminum pipe 2 pipe ends is processed into the welding taper surface that external diameter is slightly smaller than soft attitude aluminum pipe 12 internal diameters, put into a root bead in advance in the inside of hard attitude aluminum pipe 2 and connect plug 1, hard attitude aluminum pipe 2 places inner pressed resistor pressure bonding machine traveling electrode 3 together with welding plug 1.Soft attitude aluminum pipe 12 ports are not done further processing, keep wall thickness and diameter original state, and soft attitude aluminum pipe 12 places inner pressed resistor pressure bonding machine fixed electrode 5.For improving welding quality, on fixed electrode 5, traveling electrode 3, respectively inlay titanium alloy mosaic block 4, improve welding fusion area and quality.Mill out waveform lines 7 in advance on the welding position of the mosaic block 4 that fixed electrode 5 is inlayed.By the resistor pressure bonding machine traveling electrode 3 and hard attitude aluminum pipe 2 thereof are moved horizontally in the soft attitude aluminum pipe 12 of insertion.The taper solder side 6 of hard attitude aluminum pipe 2 grinds away the oxide layer on soft attitude aluminum pipe 12 inwalls in the grafting process, simultaneously to traveling electrode 3, fixed electrode 5 energisings, under the effect of resistance heat, soft attitude aluminum pipe 12 melts rapidly, the aluminium liquid of inner fusing is filled out in the middle of welding plug 1 and the hard attitude aluminum pipe 2, the aluminium liquid of melted outside is filled in the waveform lines 7, make the aluminium liquid that splashes not influence the inside and outside quality of weld seam, enter into soft attitude aluminum pipe 12 fully until taper solder side 6, disconnect the source of welding current then.Continue to advance welding plug 1, the welding point internal diameter is enlarged, extract welding plug 1 then rapidly out, finish welding.
Specific embodiment 2:
With reference to Fig. 2, the taper solder side of hard attitude aluminum pipe 2 also can be among polyline shaped such as Fig. 2 10, the broken line diameter d should be slightly larger than the internal diameter of soft attitude aluminum pipe 12, reduced the resistance of soft attitude aluminum pipe when inserting hard attitude aluminum pipe, help preventing hard attitude aluminum pipe deformation instability, and formed two sections fusion weld seams, and improve welding fusion area and quality.
By the aluminum pipe welded joint of method for preparing, in the soft attitude aluminum tube surfaces of welding point the waveform concave convex texture is arranged, be called for short ripple glaze.
The present invention describes with reference to drawings and Examples, but protection domain is not limited thereto, and has those of ordinary skill and can pass through simple conversion in the technology of the present invention scope, and obtain the same technique effect of the present invention, equally in protection scope of the present invention.
Claims (6)
1, the preparation method of inserted aluminum pipe welded joint, it is characterized in that getting hard attitude aluminum pipe, each one of soft attitude aluminum pipe, the welding position of hard attitude aluminum pipe pipe end is processed into the taper solder side, the external diameter at the thinnest place of welding taper surface should be slightly less than soft attitude aluminum pipe internal diameter, in hard attitude aluminum pipe, insert a welding plug before the welding in advance, the top external diameter of this welding plug and hard attitude aluminum pipe the taper surface internal diameter at thin place match, the diameter and the wall thickness of soft attitude aluminum pipe remain unchanged, the hard attitude aluminum pipe of welding plug will be inserted, soft attitude aluminum pipe is separately fixed on float electrode and the fixed electrode, traveling electrode drives hard attitude aluminum pipe and moves in the soft attitude aluminum pipe of insertion, simultaneously to electrifying electrodes, enter soft attitude aluminum pipe fully until the taper solder side of hard attitude aluminum pipe.
2, the preparation method of inserted aluminum pipe welded joint as claimed in claim 1 disconnects the source of welding current after the taper solder side that it is characterized in that described hard attitude aluminum pipe enters soft attitude aluminum pipe fully, continues to advance the welding plug, extracts the welding plug then rapidly out.
3, the preparation method of inserted aluminum pipe welded joint as claimed in claim 1 or 2 is characterized in that described taper solder side is the polyline shaped solder side.
4,, it is characterized in that described fixed electrode, traveling electrode are inlaid with the mosaic block of making of the material of high-fire resistance and low heat transfer efficient as the preparation method of claim 1,2 or 3 described inserted aluminum pipe welded joints.
5, the preparation method of inserted aluminum pipe welded joint as claimed in claim 4 is characterized in that described mosaic block makes of titanium alloy.
6,, it is characterized in that the waveform lines is carved with at the groove position of described mosaic block as the preparation method of claim 4 or 5 described inserted aluminum pipe welded joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101073781A CN101318255A (en) | 2007-06-04 | 2007-06-04 | Method of manufacturing inserted aluminum pipe welded joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101073781A CN101318255A (en) | 2007-06-04 | 2007-06-04 | Method of manufacturing inserted aluminum pipe welded joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101318255A true CN101318255A (en) | 2008-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101073781A Pending CN101318255A (en) | 2007-06-04 | 2007-06-04 | Method of manufacturing inserted aluminum pipe welded joint |
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| CN (1) | CN101318255A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513684A (en) * | 2011-11-28 | 2012-06-27 | 左铁军 | Special welding fixture for copper aluminum tube and welding method and copper aluminum welded tube utilizing the same |
| CN103350274A (en) * | 2013-06-13 | 2013-10-16 | 中国海洋大学 | Preparation method of welded joint of aluminum pipes |
| CN103521898A (en) * | 2013-10-08 | 2014-01-22 | 俞亮亮 | Unequal-diameter welding butt joint aluminum alloy pipe |
| CN105252120A (en) * | 2015-11-19 | 2016-01-20 | 安徽大盘特种装备车辆有限公司 | Circular seam welding method for stainless steel gas cylinder liner |
| CN106425067A (en) * | 2016-10-14 | 2017-02-22 | 合肥太通制冷科技有限公司 | Resistance butt welding machine die provided with core rod |
| CN107476958A (en) * | 2017-09-22 | 2017-12-15 | 刘悦吟 | A kind of compressor air suction structure |
-
2007
- 2007-06-04 CN CNA2007101073781A patent/CN101318255A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513684A (en) * | 2011-11-28 | 2012-06-27 | 左铁军 | Special welding fixture for copper aluminum tube and welding method and copper aluminum welded tube utilizing the same |
| CN103350274A (en) * | 2013-06-13 | 2013-10-16 | 中国海洋大学 | Preparation method of welded joint of aluminum pipes |
| CN103521898A (en) * | 2013-10-08 | 2014-01-22 | 俞亮亮 | Unequal-diameter welding butt joint aluminum alloy pipe |
| CN105252120A (en) * | 2015-11-19 | 2016-01-20 | 安徽大盘特种装备车辆有限公司 | Circular seam welding method for stainless steel gas cylinder liner |
| CN106425067A (en) * | 2016-10-14 | 2017-02-22 | 合肥太通制冷科技有限公司 | Resistance butt welding machine die provided with core rod |
| CN107476958A (en) * | 2017-09-22 | 2017-12-15 | 刘悦吟 | A kind of compressor air suction structure |
| CN107476958B (en) * | 2017-09-22 | 2023-09-19 | 刘悦吟 | Air suction structure of compressor |
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Open date: 20081210 |