CN102581414A - Method for brazing copper aluminum tubes without aid of brazing flux - Google Patents
Method for brazing copper aluminum tubes without aid of brazing flux Download PDFInfo
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- CN102581414A CN102581414A CN2012100702240A CN201210070224A CN102581414A CN 102581414 A CN102581414 A CN 102581414A CN 2012100702240 A CN2012100702240 A CN 2012100702240A CN 201210070224 A CN201210070224 A CN 201210070224A CN 102581414 A CN102581414 A CN 102581414A
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- welding
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- brazing
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/14—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams
- B23K1/18—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams circumferential seams, e.g. of shells
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/06—Soldering, e.g. brazing, or unsoldering making use of vibrations, e.g. supersonic vibrations
-
- 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
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- 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
- B23K1/002—Soldering by means of induction heating
-
- 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
- B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
-
- 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
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
-
- 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
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
Abstract
The invention discloses a method for brazing copper aluminum tubes without the aid of brazing flux. The method includes the steps: firstly, expanding one end of optional one of the copper aluminum tubes into a socket by a thermal expansion method, manufacturing a brazing alloy plate into a brazing thin tube by a stamping method, and placing the brazing thin tube into the socket; secondly, inserting one end of another welded tube into the brazing thin tube, and tightly abutting the end opening of the welded tube to the bottom of the socket to form close fit; and thirdly, assembling the brazing thin tube and the welded tube on a welding fixture, performing local induction heating for joints, and applying proper welding pressure and ultrasonic vibration. The method can be used for brazing the thin-wall copper aluminum tubes without the brazing flux, fusion lines are long, welding seams are compact, slag inclusion is avoided, the air tightness and the bonding strength of the joints are greatly improved, reliability is high, welding time is short, and great production and use values are achieved.
Description
Technical field
The present invention relates to the method for welding between a kind of metal material, the method for solder without soldering acid between especially a kind of copper aluminum pipe.
Background technology
The interconnection technique of copper aluminum pipe is widely used at refrigeration industry.Adopt aluminum pipe to substitute the main material of copper pipe, not only can reduce weight of equipment, can also significantly reduce product cost as heat exchanger internal pipeline, tube connector, circulatory system pipeline.Just because of this, the exploitation of thin wall copper aluminum pipe interconnection technique all is the focus that refrigeration industry is paid close attention to all the time.
The technical indicator of copper-aluminium tube joint comprises: strength of joint, corrosion resistance and air-tightness; And the factor that influences these technical indicators mainly contains: joint fuses line length, the formation and the distribution of joint internal stress, joint impurity and air vent content and joint microstructure.Because there are a series of difficult points in copper aluminium dissimilar metal when connecting, as: the physical property of copper and aluminium (fusing point, thermal conductivity, linear expansion coefficient, melting heat etc.) differs greatly, remaining bigger internal stress in weld seam easily when directly welding; In addition, the brittle metal that forms stratiform between the copper aluminium is easily seen compound, and this compound will cause material impact to strength of joint, fatigue durability and the plasticity etc. of copper-aluminium tube joint; Moreover the compact aluminum oxide film that aluminium material surface exists has produced very big inhibition to the mother metal wetting of surfaces.Therefore, alleviating the difference of physical property between heterogeneous mother metal, reduce the formation of compound between the stratiform brittle metal, is the key that obtains high-quality copper and aluminium welding joint with the length that promotes the mother metal wetting of surfaces as much as possible and increase melt run.
Produce copper aluminum pipe connected mode upward commonly used at present and be mainly Solid-State Welding and soldering.Wherein, The solid phase connecting method of copper aluminum pipe mainly includes three kinds of friction butt welding, electric resistance welding and stored energy weldings; Owing to be that copper combines with the direct of aluminium, the copper-aluminium joint that therefore prepares through these modes all has compound between certain thickness brittle metal (IMC) and remaining that internal stress is greatly arranged; These methods all need apply bigger upsetting force to mother metal in implementation process, and carry out violent phase mutual friction or discharge so that the mother metal local melting, so these class methods are not suitable for the connection of ultra-thin copper aluminum pipe (being lower than 0.5mm like pipe thickness); Moreover, through the very difficult copper-aluminium tube joint (being generally less than 5mm) that obtains to have longer melt run of the method for Solid-State Welding.
Compare Solid-State Welding, soldering is more general in the connection of foreign material.Compare with Solid-State Welding with melting welding, the difference of physical property between heterogeneous mother metal has been alleviated in the use of solder in the soldering, has strengthened the endurance load-carrying ability of joint; In addition, soldering also has the adaptability of complex part strong, and joint tighness is good, a little less than the corrosion mother metal ability, and numerous advantages such as the online production ability is strong.Yet soldering also has comparatively outstanding inferior position, and that is exactly to use brazing flux.When the method through soldering prepared copper-aluminium tube joint, the use of brazing flux produced pore and is mingled with in weld seam easily on the one hand, thereby greatly reduced the corrosion resistance of joint; Also cause the solder that from weld seam, overflows bonding on tube wall on the other hand easily, make that the postwelding slagging-off is difficult.In addition; In the brazing flux soldering was arranged, in case weld seam temperature in the process that heats up reaches the activation temperature of brazing flux, the mother metal surface was just wetting by solder institute; Thereby increased the reaction time of solder and mother metal; Than the long reaction time, will cause the excessive corrosion of mother metal on the one hand, thereby be unfavorable for the preparation of thin wall copper aluminum pipe joint between solder and mother metal; Also be prone on the other hand grow compound between thicker brittle metal, thereby cause relatively poor Joint Reliability.
Method for welding between one Chinese patent application CN102151930A different metal materials; Disclose a kind of solder without soldering acid method through ultrasonic vibration auxiliary realization dissimilar metal tubing or bar, this patent application has been done detailed description to principle, joint geometry, jig and the correlation technique index etc. of ultrasonic auxiliary copper aluminum pipe solder without soldering acid.But, adopt the prepared copper aluminum pipe welded joint melt run of this inventive method to lack, be welded into shortcomings such as power is low, and this method is not suitable for the welding of overlength pipe and non-straight connector through further discovering.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art, the present invention provides a kind of copper aluminum pipe not have brazing flux pricker method, adopts the inventive method can obtain longer melt run copper aluminum pipe welded joint.
The technical scheme that the present invention adopts is: a kind of copper aluminum pipe solder without soldering acid method; Said copper, aluminum pipe include the straight length that needs welding; Said method for welding comprises that soldering presets the preparation process and the ultrasonic vibration assistant brazing step of joint, and the preparation process that joint is preset in said soldering comprises step by step following:
A1, straight length that said copper, aluminum pipe is any one adopt the heat expansion method that the one of which end is expanded into bell and spigot as first welded pipe, and another straight length is as second welded pipe; Said bell and spigot comprises socket joint straight sections and bellmouth transition part, and the internal diameter of said socket joint straight sections is than the big 50-800 μ of the external diameter m of second welded pipe, and the degree of depth of socket joint straight sections is 5-20mm;
A2, employing impact forming method are processed the solder light wall pipe with the brazing filler metal alloy sheet; The internal diameter of said solder light wall pipe is than the little 0-50 μ of second welded pipe external diameter m; The pipe thickness of solder light wall pipe is than a medium-sized 0-50 μ m of the said first welded pipe socket joint straight sections internal diameter and the second welded pipe external diameter difference, and the length of solder light wall pipe is than the big 1-10mm of the degree of depth of said socket joint straight sections;
A3, said solder light wall pipe is positioned in the socket joint straight sections of first welded pipe; Make its port be tight against the bellmouth transition part of first welded pipe in the end insertion solder light wall pipe with second welded pipe subsequently; Form between the socket joint straight sections of said first welded pipe and solder light wall pipe, solder light wall pipe and second welded pipe and closely cooperate, obtain soldering and preset joint;
Said ultrasonic assistant brazing step comprises step by step following:
B1, joint is preset in soldering be assemblied on the weld jig: adopt fixture to clamp with one in first welded pipe, second welded pipe, and another welded pipe is assemblied in and limits on the anchor clamps so that this pipe only can be along slip (welded pipe in axial sliding) on its axis direction;
The bell and spigot that B2, the mode through eddy-current heating preset joint to welding partly carries out local heat makes solder light wall pipe temperature reach welding temperature, and welded pipe is in axial sliding applied the welding pressure along this tube axis direction, and the pressure size is 0.5-10MPa;
B3, welded pipe is in axial sliding applied ultrasonic vibration, the ultrasonication time is 0.5-20 second;
B4,0.1-5 closes eddy-current heating second before ultrasonic vibration stops back or ultrasonic vibration and stops, and the pressure of continuation pressurizer is cooled to 20-300 ℃ until welding point.
Wherein said brazing filler metal alloy is aluminium base solder, tin-based solder, zinc-based solder, copper base solder or silver based soldering alloy.
As further improvement, directly apply welding pressure through ultrasonic amplitude transformer from the top of welded pipe in axial sliding among the said step B2, the direction of ultrasonic vibration is parallel to the axis direction of welded pipe among the step B3.
As further improvement; Ultrasonic vibration among the said step B3 applies from the sidepiece of the welded pipe in axial sliding mode with single-point or the ultrasonic vibration of multiple spot point contact; The direction of ultrasonic vibration is perpendicular to the tangent plane of contact tube wall, and the contact pressure of ultrasonic amplitude transformer and tube wall is 0.1-5MPa.
As further improvement; Qualification anchor clamps among the said step B1 are ultrasonic amplitude transformer; The head of said ultrasonic amplitude transformer comprises fastener; Said ultrasonic amplitude transformer has the free degree that is parallel to the welded pipe axis direction, and said fastener is used to tighten up described another welded pipe only can slide this pipe along its axis direction; Ultrasonic vibration among welding pressure among the said step B2 and the said step B3 applies through the fastener of said ultrasonic amplitude transformer; The direction of said welding pressure is parallel to the axis direction of said welded pipe, and the direction of said ultrasonic vibration is vertical or parallel to the axis direction of said welded pipe.
Preferably, in the technique scheme, the welding temperature among the said step B2 is than the high 1-150 of fusing point ℃ of said brazing filler metal alloy.
Preferably, in the technique scheme, the frequency of ultrasonic vibration is 10-70kHz among the said step B3, and amplitude is 8-60 μ m.
Copper aluminum pipe solder without soldering acid method of the present invention has following useful technique effect:
1, welding point adopts the cup type mouth of pipe and close-fitting whole solder sheet mode in the inventive method; Promoted the formation of melt run in conjunction with ultrasonic stepless action in weld seam; Realized the preparation of longer melt run weld seam; And joint is fine and close, porosity is low, seam organization is fine and closely woven evenly, thereby joint air-tightness and bond strength have been improved greatly;
2, reduced the formation of stratiform IMC, its IMC layer can effectively be controlled at below the 3 μ m, is significantly less than in the copper and aluminium welding joint IMC layer critical thickness value (about 10 μ m) when causing the joint timeliness because of fragility IMC, has improved the reliability of joint;
3, between mother metal and solder wetting reaction will not take place, thereby shorten the reaction time of solder and mother metal, weaken the corrosion of solder to mother metal, be suitable for the connection of thin wall copper aluminum pipe before ultrasonic vibration applies;
Even if 4, the zone outside the joint tube wall has solder to overflow also can be thrown off tube wall because of the shake of tube wall; The copper aluminum pipe inserts the mouth of pipe and cooperates with cup type enlarging bottom and closely add at the copper aluminum pipe and axially be applied with constant pressure, makes molten solder to be difficult in the pipe and overflows, and does not have obstinate residue basically after therefore adopting this method to weld;
5, the inventive method is short weld interval, and productivity effect is high, can realize the automation welding;
6, apply the position through changing ultrasonic vibration, can realize the connection of bend pipe and longer copper aluminum pipe.
Description of drawings
Fig. 1 is the welding sketch map that ultrasonic vibration acts on the aluminum pipe top;
Fig. 2 is the welding sketch map that ultrasonic vibration acts on the copper pipe bottom;
Fig. 3 is the welding sketch map that ultrasonic vibration acts on the aluminum pipe sidewall;
Fig. 4 is ultrasonic vibration vertically acts on the aluminum pipe sidewall with the mode of ring wall contact a welding sketch map;
Fig. 5 is that ultrasonic vibration is parallel to the welding sketch map of aluminum pipe axial action in the aluminum pipe sidewall with the mode that ring wall contacts;
Fig. 6 is the sketch map of Fig. 4, ring wall way of contact ultrasonic amplitude transformer shown in Figure 5.
The specific embodiment
Below be embodiments of the invention, through these embodiment and combine accompanying drawing can further be well understood to the present invention, but they are not to qualification of the present invention.
Referring to Fig. 1, get respectively one of T2 copper pipe 1 and 1060 aluminum pipe 2, copper, aluminum pipe size are: pipe thickness 0.5mm, pipe range 80mm, external diameter 8mm.With copper, the equating of the aluminum pipe mouth of pipe whole after, adopt the heat expansion method that the one end mouth of pipe of copper pipe 1 is expanded and be bell and spigot, bell and spigot comprises socket joint straight sections 11 and bellmouth transition part 12, wherein the degree of depth of socket joint straight sections 11 is that 10mm, internal diameter are 8.2mm.Get one of Zn-4Al brazing filler metal alloy sheet (fusing point is 380 ℃), going out thickness through stamping machine is that 0.1mm, internal diameter are that 8mm, length are the solder light wall pipe 3 of 12mm.Aluminum pipe 2 end mouths of pipe to be welded, copper pipe 1 bell and spigot and solder light wall pipe 3 are cleaned through supersonic wave cleaning machine and dry; Subsequently solder light wall pipe 3 is inserted in the socket joint straight sections 11 of copper pipe 1 bell and spigot; Insert the end to be welded of aluminum pipe 2 in the solder light wall pipe 3 again and make port be tight against bellmouth transition part 12, closely cooperate thereby form between the end to be welded of the socket joint straight sections 11 of copper pipe 1 and solder light wall pipe 3, solder light wall pipe 3 and aluminum pipe 1.
The copper that assembles, aluminum pipe brazing are preset joint be installed on the weld jig, wherein aluminum pipe 2 is put into and limited anchor clamps 5, limit anchor clamps 5 and make the aluminum pipe 2 can only be along sliding (promptly endwisely slipping) on its axis direction, 1 of copper pipe clamps through stationary fixture 4.The copper that fixes, aluminum pipe brazing are preset joint move in the induction coil 6, coil 6 just in time covers the bell and spigot part of copper pipe 1, carries out local heat can joint being preset in soldering; The adjustment infrared radiation thermometer, and in the process of welding, welding temperature is monitored in real time.
The unlatching induction heating apparatus presets joint to copper, aluminum pipe brazing and carries out local fast heating; When temperature reaches 420 ℃, start the pressue device of ultrasonic vibration machine, make ultrasonic amplitude transformer 7 from aluminum pipe 2 other end mouths of pipe along tubular axis to the constant weld pressure that applies 5MPa; After 1 second ultrasonic vibration automatically open and to aluminum pipe 2 apply along tubular axis to dither; The ultrasonic vibration frequency is 20kHz, and amplitude is 30 μ m, and time of vibration is 4 seconds.Vibration stops eddy-current heating after finishing, and treats that copper, aluminum pipe temperature stop when reducing to 60 ℃ exerting pressure and taking out copper, the aluminum pipe that welds.
The copper, the aluminium tube joint that weld are got the longitudinal section carry out microscopic analysis, the result shows that the average length of welding melt run reaches 10mm, and promptly copper, aluminum pipe overlap the position all by seam in the bell and spigot; Welding line structure is fine and close, and tissue distribution is even, does not have obvious pore and is mingled with existence; The average thickness of weld seam IMC layer is about 2.3 μ m.Copper, aluminum pipe are carried out extension test, and the joint breaking failure site all betides in the aluminum mother plate.
Referring to Fig. 2; Present embodiment is compared with embodiment 1, and different is with soldering when presetting joint and being loaded on anchor clamps, copper pipe 1 is put into limited anchor clamps 5; Limit anchor clamps 5 and make the copper pipe 1 can only be along sliding (promptly endwisely slipping) on its axis direction, 2 of aluminum pipes clamp through stationary fixture 4; Welding pressure and ultrasonic vibration through ultrasonic amplitude transformer 7 from copper pipe 1 other end mouth of pipe along tubular axis to applying, other step method are identical with embodiment 1.
The copper, the aluminium tube joint that weld are got the longitudinal section carry out microscopic analysis, the result shows that the average length of welding melt run reaches 10mm, and promptly copper, aluminum pipe overlap the position all by seam in the bell and spigot; Welding line structure is fine and close, and tissue distribution is even, does not have obvious pore and is mingled with existence; The average thickness of weld seam IMC layer is about 2.2 μ m.Copper, aluminum pipe are carried out extension test, and the joint breaking failure site all betides in the aluminum mother plate.
Referring to Fig. 3, present embodiment is compared with embodiment 1, and different is that welding pressure applies through the end of pressure apparatus 8 at aluminum pipe 2 vertically, and ultrasonic vibration is applied by the sidewall of ultrasonic amplitude transformer 7 from aluminum pipe 2, and other step method are identical with embodiment 1.
Concrete implementation process is: after treating that connector temperature reaches 420 ℃, apply constant weld pressure through pressure apparatus 8 in aluminum pipe 2 ends, the pressure size is 3MPa; After treating pressure stability, start ultrasonic pressure apparatus, make 7 pairs of aluminum pipe 2 tube walls of ultrasonic amplitude transformer apply the contact pressure of 0.5MPa; Open ultrasonic vibration subsequently, direction of vibration is axially vertical with aluminum pipe, and the ultrasonic vibration frequency is 30kHz; Amplitude is 20 μ m, and time of vibration is 5 seconds; Stop eddy-current heating after vibration finishes, remove ultrasonic amplitude transformer 7 and continue the axial compressive force of pressurizer 8; Treat that removal pressure also took out the copper-aluminium tube joint that welds when the copper aluminum pipe was cooled to below 300 ℃.
The copper, the aluminium tube joint that weld are got the longitudinal section carry out microscopic analysis, the result shows that the average length of welding melt run reaches 10mm, and promptly copper, aluminum pipe overlap the position all by seam in the bell and spigot; Welding line structure is fine and close, and tissue distribution is even, does not have obvious pore and is mingled with existence; The average thickness of weld seam IMC layer is about 2.5 μ m.Copper, aluminum pipe are carried out extension test, and the joint breaking failure site all betides in the aluminum mother plate.
Referring to Fig. 4; Present embodiment is compared with embodiment 1, and different is: limit anchor clamps and be the fastener of ultrasonic amplitude transformer 7 heads, and as shown in Figure 6; Fastener comprise two with suitable end snap ring of aluminum pipe 2 external diameters 71 and movable snap ring 72; Two snap ring two ends can be fastening or an end is fastening with aluminum pipe 2 with bolt with the hinge other end with aluminum pipe 2 through bolt, and ultrasonic amplitude transformer 7 has the free degree that is parallel to aluminum pipe 2 axis directions, makes that aluminum pipe 2 can only be along sliding on its axis direction; Welding pressure and ultrasonic vibration are applied through fastener by ultrasonic amplitude transformer 7, and the direction of ultrasonic vibration is perpendicular to the axis direction of aluminum pipe 2.Other step method are identical with embodiment 1.
Concrete implementation process is: the copper pipe 1 that the copper that assembles, aluminum pipe brazing are preset in the joint clamps through stationary fixture 4, subsequently aluminum pipe 2 is fixed on the fastener of ultrasonic amplitude transformer 7.Induction coil is moved on to the welding point place of copper, aluminum pipe; Open induction heating apparatus subsequently copper, aluminum pipe welded joint are carried out local fast heating; When temperature reaches 420 ℃, start the pressue device on the ultrasonic amplitude transformer 7,7 pairs of aluminum pipes 2 of ultrasonic amplitude transformer are applied along the axial welding pressure of aluminum pipe 2; The pressure size is 2MPa, and ultrasonic vibration is automatically opened and aluminum pipe 2 is applied the dither perpendicular to aluminum pipe 2 axis directions after 1 second.The ultrasonic vibration frequency is 60kHz, and amplitude is 20 μ m, and time of vibration is 4 seconds.The vibration end stopped eddy-current heating and continued pressurize in preceding 0.5 second, treated that copper aluminum pipe temperature stops when reducing to below 300 ℃ exerting pressure and taking out the copper aluminum pipe that welds.
The copper, the aluminium tube joint that weld are got the longitudinal section carry out microscopic analysis, the result shows that the average length of welding melt run reaches 10mm, and promptly copper, aluminum pipe overlap the position all by seam in the bell and spigot; Welding line structure is fine and close, and tissue distribution is even, does not have obvious pore and is mingled with existence; The average thickness of weld seam IMC layer is about 2.7 μ m.Copper, aluminum pipe are carried out extension test, and the joint breaking failure site all betides in the aluminum mother plate.
Referring to Fig. 5, present embodiment is compared with embodiment 4, and the direction that unique not being both applies ultrasonic vibration is the axis direction that is parallel to aluminum pipe 2, and other step method are identical with embodiment 4.
The copper, the aluminium tube joint that weld are got the longitudinal section carry out microscopic analysis, the result shows that the average length of welding melt run reaches 10mm, and promptly copper, aluminum pipe overlap the position all by seam in the bell and spigot; Welding line structure is fine and close, and tissue distribution is even, does not have obvious pore and is mingled with existence; The average thickness of weld seam IMC layer is about 3.0 μ m.Copper, aluminum pipe are carried out extension test, and the joint breaking failure site all betides in the aluminum mother plate.
Above content is to combine specific embodiment to further specify what the present invention did, can not assert that scope of the present invention is confined to these explanations.Also can aluminum pipe one end be expanded to bell and spigot inserts with copper pipe in the foregoing description and weld; Perhaps ultrasonic vibration is applied on the copper pipe or the like; Those of ordinary skill for technical field under the present invention; Under the prerequisite that does not break away from the present invention's design, some deduction or replace of making all should be regarded as belonging to protection scope of the present invention.
Claims (6)
1. copper aluminum pipe solder without soldering acid method; Said copper, aluminum pipe include the straight length that needs welding; It is characterized in that: said method for welding comprises that soldering presets the preparation process and the ultrasonic vibration assistant brazing step of joint, and the preparation process that joint is preset in said soldering comprises step by step following:
A1, straight length that said copper, aluminum pipe is any one adopt the heat expansion method that the one of which end is expanded into bell and spigot as first welded pipe, and another straight length is as second welded pipe; Said bell and spigot comprises socket joint straight sections and bellmouth transition part, and the internal diameter of said socket joint straight sections is than the big 50-800 μ of the external diameter m of second welded pipe, and the degree of depth of socket joint straight sections is 5-20mm;
A2, employing impact forming method are processed the solder light wall pipe with the brazing filler metal alloy sheet; The internal diameter of said solder light wall pipe is than the little 0-50 μ of second welded pipe external diameter m; The pipe thickness of solder light wall pipe is than a medium-sized 0-50 μ m of the said first welded pipe socket joint straight sections internal diameter and the second welded pipe external diameter difference, and the length of solder light wall pipe is than the big 1-10mm of the degree of depth of said socket joint straight sections;
A3, said solder light wall pipe is positioned in the socket joint straight sections of first welded pipe; Make its port be tight against the bellmouth transition part of first welded pipe in the end insertion solder light wall pipe with second welded pipe subsequently; Form between the socket joint straight sections of said first welded pipe and solder light wall pipe, solder light wall pipe and second welded pipe and closely cooperate, obtain soldering and preset joint;
Said ultrasonic assistant brazing step comprises step by step following:
B1, joint is preset in soldering be assemblied on the weld jig: adopt fixture to clamp with one in first welded pipe, second welded pipe, and another welded pipe is assemblied in and limits on the anchor clamps so that this pipe only can be along sliding on its axis direction;
The bell and spigot that B2, the mode through eddy-current heating preset joint to welding partly carries out local heat makes solder light wall pipe temperature reach welding temperature, and welded pipe is in axial sliding applied the welding pressure along this tube axis direction, and the pressure size is 0.5-10MPa;
B3, welded pipe is in axial sliding applied ultrasonic vibration, the ultrasonication time is 0.5-20 second;
B4,0.1-5 closes eddy-current heating second before ultrasonic vibration stops back or ultrasonic vibration and stops, and the pressure of continuation pressurizer is cooled to 20-300 ℃ until welding point.
2. copper aluminum pipe solder without soldering acid method according to claim 1 is characterized in that: the welding temperature among the said step B2 is than the high 1-150 of fusing point ℃ of said brazing filler metal alloy.
3. copper aluminum pipe solder without soldering acid method according to claim 1 and 2, it is characterized in that: the frequency of ultrasonic vibration is 10-70kHz among the said step B3, amplitude is 8-60 μ m.
4. copper aluminum pipe solder without soldering acid method according to claim 1 and 2; It is characterized in that: directly apply welding pressure through ultrasonic amplitude transformer from the top of welded pipe in axial sliding among the said step B2, the direction of ultrasonic vibration is parallel to the axis direction of welded pipe among the step B3.
5. copper aluminum pipe solder without soldering acid method according to claim 1 and 2; It is characterized in that: the ultrasonic vibration among the said step B3 applies from the sidepiece of the welded pipe in axial sliding mode with single-point or the ultrasonic vibration of multiple spot point contact; The direction of ultrasonic vibration is perpendicular to the tangent plane of contact tube wall, and the contact pressure of ultrasonic amplitude transformer and tube wall is 0.1-5MPa.
6. copper aluminum pipe solder without soldering acid method according to claim 1 and 2; It is characterized in that: the qualification anchor clamps among the said step B1 are ultrasonic amplitude transformer; The head of said ultrasonic amplitude transformer comprises fastener; Said ultrasonic amplitude transformer has the free degree that is parallel to the welded pipe axis direction, and said fastener is used to tighten up described another welded pipe only can slide this pipe along its axis direction; Ultrasonic vibration among welding pressure among the said step B2 and the said step B3 applies through the fastener of said ultrasonic amplitude transformer; The direction of said welding pressure is parallel to the axis direction of said welded pipe, and the direction of said ultrasonic vibration is vertical or parallel to the axis direction of said welded pipe.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100702240A CN102581414A (en) | 2012-03-16 | 2012-03-16 | Method for brazing copper aluminum tubes without aid of brazing flux |
| PCT/CN2012/073376 WO2013134974A1 (en) | 2012-03-16 | 2012-03-31 | Method for brazing copper tube and aluminum tube without brazing flux |
| KR1020137007834A KR20140015254A (en) | 2012-03-16 | 2012-03-31 | A fluxless soldering method of copper and aluminium pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100702240A CN102581414A (en) | 2012-03-16 | 2012-03-16 | Method for brazing copper aluminum tubes without aid of brazing flux |
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| CN102581414A true CN102581414A (en) | 2012-07-18 |
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| CN2012100702240A Pending CN102581414A (en) | 2012-03-16 | 2012-03-16 | Method for brazing copper aluminum tubes without aid of brazing flux |
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| KR (1) | KR20140015254A (en) |
| CN (1) | CN102581414A (en) |
| WO (1) | WO2013134974A1 (en) |
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| CN102784988A (en) * | 2012-08-31 | 2012-11-21 | 郑州机械研究所 | Method for vibration-assisted induction brazing |
| CN103343847A (en) * | 2013-07-09 | 2013-10-09 | 扬州红人实业有限公司 | Copper aluminum tube and welding process thereof |
| CN103567647A (en) * | 2012-07-20 | 2014-02-12 | 汉中新环干式变压器有限责任公司 | Conductor thick-wall long pipe welding method |
| CN103600150A (en) * | 2013-11-13 | 2014-02-26 | 中国兵器工业第五二研究所 | Ultrasonic-assisted induction brazing method of deformation zinc alloy parts |
| CN103624354A (en) * | 2013-12-12 | 2014-03-12 | 西北有色金属研究院 | Insertion welding method for dense metal pipe and porous metal pipe |
| CN103639609A (en) * | 2013-12-05 | 2014-03-19 | 山东理工大学 | Method and device for thickening end of thin-walled seamless pipe |
| CN103737169A (en) * | 2013-12-06 | 2014-04-23 | 大连华夏泰克电气集团有限公司 | Novel high frequency welding process for primary line of current transformer |
| CN104762586A (en) * | 2015-04-24 | 2015-07-08 | 安徽工程大学 | Workpiece hot spraying technology and spraying device thereof |
| CN106584036A (en) * | 2016-12-28 | 2017-04-26 | 江苏恒才液压机械制造有限公司 | Welded type seamless tube machining method |
| CN106938362A (en) * | 2017-04-24 | 2017-07-11 | 武汉理工大学 | A kind of connection method of magnetic pulse formation assistant brazing metal tube |
| CN106956053A (en) * | 2017-03-06 | 2017-07-18 | 东莞市迈纳斯航空技术有限公司 | A kind of vacuum brazing method of titanium alloy pipeline |
| CN107511550A (en) * | 2017-09-08 | 2017-12-26 | 陕西飞机工业（集团）有限公司 | A kind of high-frequency induction brazing device and method of aluminum bronze soldered fitting |
| CN107738038A (en) * | 2017-09-30 | 2018-02-27 | 昂纳信息技术（深圳）有限公司 | A kind of tail pipe and its welding method of anti-displacement |
| WO2018176628A1 (en) * | 2017-04-01 | 2018-10-04 | 广东工业大学 | Ultrasound flux-free aluminium pipe brazing method and apparatus |
| CN108941828A (en) * | 2018-09-27 | 2018-12-07 | 武汉理工大学 | A kind of heterogenous metal brazing device and method that semisolid is assisted without brazing flux |
| CN109604807A (en) * | 2018-12-14 | 2019-04-12 | 山东新合源热传输科技有限公司 | A kind of ultrasonic wave auxiliary high frequency device for welding aluminium pipe |
| CN111347114A (en) * | 2020-04-09 | 2020-06-30 | 河南科技大学 | Ultrasonic-assisted solder spreading process observation device |
| CN111421198A (en) * | 2020-03-23 | 2020-07-17 | 燕山大学 | Device and method for local rapid welding of metal pipe |
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| CN113102858A (en) * | 2020-01-13 | 2021-07-13 | 武汉理工大学 | Pipe fitting magnetic pulse welding device and method for welding pipe fitting by using same |
| CN114667200A (en) * | 2019-11-13 | 2022-06-24 | 高准有限公司 | Method for coupling and sealing components comprising different materials in a gastight manner |
| CN115283771A (en) * | 2022-07-29 | 2022-11-04 | 鸿创智能装备(苏州)有限公司 | Double-station induction brazing equipment for bicycle aluminum parts |
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- 2012-03-16 CN CN2012100702240A patent/CN102581414A/en active Pending
- 2012-03-31 WO PCT/CN2012/073376 patent/WO2013134974A1/en active Application Filing
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| CN103567647A (en) * | 2012-07-20 | 2014-02-12 | 汉中新环干式变压器有限责任公司 | Conductor thick-wall long pipe welding method |
| CN102784988A (en) * | 2012-08-31 | 2012-11-21 | 郑州机械研究所 | Method for vibration-assisted induction brazing |
| CN103343847B (en) * | 2013-07-09 | 2018-02-02 | 扬州红人实业有限公司 | Cu-AL pipe and its welding procedure |
| CN103343847A (en) * | 2013-07-09 | 2013-10-09 | 扬州红人实业有限公司 | Copper aluminum tube and welding process thereof |
| CN103600150B (en) * | 2013-11-13 | 2016-08-24 | 中国兵器科学研究院宁波分院 | It is suitable for large area deformation kirsite parts ultrasonic assistant induction brazing method |
| CN103600150A (en) * | 2013-11-13 | 2014-02-26 | 中国兵器工业第五二研究所 | Ultrasonic-assisted induction brazing method of deformation zinc alloy parts |
| CN103639609A (en) * | 2013-12-05 | 2014-03-19 | 山东理工大学 | Method and device for thickening end of thin-walled seamless pipe |
| CN103639609B (en) * | 2013-12-05 | 2016-04-27 | 山东理工大学 | A kind of method and apparatus for thin-wall seamless pipe end upsetting |
| CN103737169A (en) * | 2013-12-06 | 2014-04-23 | 大连华夏泰克电气集团有限公司 | Novel high frequency welding process for primary line of current transformer |
| CN103624354A (en) * | 2013-12-12 | 2014-03-12 | 西北有色金属研究院 | Insertion welding method for dense metal pipe and porous metal pipe |
| CN104762586A (en) * | 2015-04-24 | 2015-07-08 | 安徽工程大学 | Workpiece hot spraying technology and spraying device thereof |
| CN106584036A (en) * | 2016-12-28 | 2017-04-26 | 江苏恒才液压机械制造有限公司 | Welded type seamless tube machining method |
| CN106956053A (en) * | 2017-03-06 | 2017-07-18 | 东莞市迈纳斯航空技术有限公司 | A kind of vacuum brazing method of titanium alloy pipeline |
| WO2018176628A1 (en) * | 2017-04-01 | 2018-10-04 | 广东工业大学 | Ultrasound flux-free aluminium pipe brazing method and apparatus |
| CN108655527A (en) * | 2017-04-01 | 2018-10-16 | 广东工业大学 | A kind of ultrasonic wave is without brazing flux aluminum pipe brazing method and device |
| CN106938362B (en) * | 2017-04-24 | 2019-08-27 | 武汉理工大学 | A kind of connection method of magnetic pulse formation assistant brazing metal tube |
| CN106938362A (en) * | 2017-04-24 | 2017-07-11 | 武汉理工大学 | A kind of connection method of magnetic pulse formation assistant brazing metal tube |
| CN107511550A (en) * | 2017-09-08 | 2017-12-26 | 陕西飞机工业（集团）有限公司 | A kind of high-frequency induction brazing device and method of aluminum bronze soldered fitting |
| CN107738038A (en) * | 2017-09-30 | 2018-02-27 | 昂纳信息技术（深圳）有限公司 | A kind of tail pipe and its welding method of anti-displacement |
| CN107738038B (en) * | 2017-09-30 | 2021-09-07 | 昂纳信息技术（深圳）有限公司 | Anti-displacement tail pipe device and welding method thereof |
| CN108941828A (en) * | 2018-09-27 | 2018-12-07 | 武汉理工大学 | A kind of heterogenous metal brazing device and method that semisolid is assisted without brazing flux |
| CN108941828B (en) * | 2018-09-27 | 2019-11-26 | 武汉理工大学 | A kind of heterogenous metal brazing device and method that semisolid is assisted without brazing flux |
| CN109604807A (en) * | 2018-12-14 | 2019-04-12 | 山东新合源热传输科技有限公司 | A kind of ultrasonic wave auxiliary high frequency device for welding aluminium pipe |
| CN114667200B (en) * | 2019-11-13 | 2024-02-13 | 高准有限公司 | Method for joining and sealing components comprising different materials in a gastight manner |
| CN114667200A (en) * | 2019-11-13 | 2022-06-24 | 高准有限公司 | Method for coupling and sealing components comprising different materials in a gastight manner |
| CN113102858A (en) * | 2020-01-13 | 2021-07-13 | 武汉理工大学 | Pipe fitting magnetic pulse welding device and method for welding pipe fitting by using same |
| CN111421198A (en) * | 2020-03-23 | 2020-07-17 | 燕山大学 | Device and method for local rapid welding of metal pipe |
| CN111421198B (en) * | 2020-03-23 | 2021-10-29 | 燕山大学 | Device and method for local rapid welding of metal pipe |
| CN111347114B (en) * | 2020-04-09 | 2021-10-22 | 河南科技大学 | Ultrasonic-assisted solder spreading process observation device |
| CN111347114A (en) * | 2020-04-09 | 2020-06-30 | 河南科技大学 | Ultrasonic-assisted solder spreading process observation device |
| CN112247303A (en) * | 2020-09-27 | 2021-01-22 | 西安远航真空钎焊技术有限公司 | Machining method for positioning and assembling bent pipe |
| CN112658421A (en) * | 2020-12-14 | 2021-04-16 | 湖南开益制冷设备有限公司 | Welding method and welding assembly for refrigeration copper pipe |
| CN112658431A (en) * | 2020-12-14 | 2021-04-16 | 湖南开益制冷设备有限公司 | Vertical copper pipe welding bench |
| CN115283771A (en) * | 2022-07-29 | 2022-11-04 | 鸿创智能装备(苏州)有限公司 | Double-station induction brazing equipment for bicycle aluminum parts |
| CN117718566A (en) * | 2024-02-08 | 2024-03-19 | 北京建工集团有限责任公司 | High-precision welding construction method for stainless steel air pipes |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140015254A (en) | 2014-02-06 |
| WO2013134974A1 (en) | 2013-09-19 |
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Application publication date: 20120718 |