CN109590574B - Use method of high-strength welding device for copper-aluminum pipeline - Google Patents
Use method of high-strength welding device for copper-aluminum pipeline Download PDFInfo
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- CN109590574B CN109590574B CN201811357586.1A CN201811357586A CN109590574B CN 109590574 B CN109590574 B CN 109590574B CN 201811357586 A CN201811357586 A CN 201811357586A CN 109590574 B CN109590574 B CN 109590574B
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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
- B23K9/00—Arc welding or cutting
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
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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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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Abstract
The invention relates to a use method of a high-strength welding device for a copper-aluminum pipeline. The technical scheme is as follows: the transition welding part is arranged in the welding actuator, the welding actuator is fixed on the welding bracket, one end of the transition welding part corresponds to the copper pipeline, and the other end of the transition welding part corresponds to the aluminum pipeline; the outer side of the copper pipeline and the outer side of the aluminum pipeline are respectively connected with a pneumatic propulsion device, the copper pipeline and the aluminum pipeline are pushed to move towards the transition welding part through the pneumatic propulsion devices, meanwhile, the copper pipeline is welded with one end of the transition welding part through a butt welding machine, and the aluminum pipeline is welded with the other end of the transition welding part; the welding executor is connected with an argon protection device, and argon protection is carried out on the welding process through the argon protection device. The beneficial effects are that: through the preparation of transition welding spare, reduce the welding degree of difficulty, with the transition welding spare as an organic whole of two kinds of different metal material preparation to make copper pipeline and aluminum pipe line can weld with the pure copper portion of transition welding spare respectively and weld with pure aluminium portion, thereby make welding strength promote by a wide margin.
Description
Technical Field
The invention relates to an automatic welding device and method for a copper-aluminum pipeline, in particular to a using method of a high-strength welding device for the copper-aluminum pipeline.
Background
The welding process of the copper-aluminum pipeline refers to a process that a copper material and an aluminum material are connected into a whole through a welding process, the welding is essentially a process that a connected individual part is melted through the heating of a metal body and is cooled, in the welding process of the copper and the aluminum, the melting points of the copper and the aluminum are different, the temperature of the copper is 1083 ℃ and the temperature of the aluminum is 660 ℃, and the existing welding process directly welds the copper pipeline and the aluminum pipeline together, so that the welding requirement of most processes can be met, but if the welding requirement is too high in quality or the welding requirement is a workpiece in a special shape such as a thin and long workpiece, the welding requirement cannot be met.
The Chinese patent document with the publication number of 203738241U and the patent name of 'a copper-aluminum butt welder' aims at solving the problems that copper and aluminum are two materials with different melting points and great difference, and the welding efficiency is low by adopting the traditional welding method. The utility model discloses a copper aluminium butt welder, including double-shaft motor, the power output shaft of upside and the power output shaft of downside of double-shaft motor on install the driving gear respectively, every driving gear and driven gear meshing, wherein, be located and install thrust bearing below the driven gear of lower part, above-mentioned installation aluminum pipe clamping device is located upper portion driven gear and steering gear meshing, steering gear's the higher authority installation pressure device, below installation copper pipe clamping device, copper pipe clamping device on be provided with the electrode, the electrode pass through the connection of electric lines transformer. The utility model discloses a welding efficiency is high, and the loss is low, and is pollution-free, the environmental protection.
The Chinese patent document publication number is 207771081U, and the patent name is 'a copper-aluminum tube butt welding machine', which comprises a frame; l-shaped plate: the device comprises a transverse plate and a longitudinal plate, wherein the transverse plate is fixedly connected with the side surface of a rack, and the longitudinal plate is vertically fixed on the surface of the transverse plate; a guide shaft; welding the assembly; a driving component: the second fixing plate is fixedly connected with the lateral surface of the transverse plate through a second cylinder, and the second cylinder drives the second fixing plate to move along the direction of the guide shaft; an external power supply: the first upper electrode and the second upper electrode are respectively electrically connected with the anode and the cathode of an external power supply. The aluminum pipe and the copper pipe are sleeved, the joint of the aluminum pipe and the copper pipe is melted by resistance heat, the interface surface is combined under the action of interatomic binding force, the welding layer is thick, the welding seam strength is high, and the welding quality is good; and solder is not needed, so that the cost is saved and the welding efficiency is high. However, there is a problem that high quality welding is not satisfied since aluminum is welded to aluminum instead of copper.
Disclosure of Invention
The invention aims to provide a using method of a high-strength welding device for a copper-aluminum pipeline aiming at the defects in the prior art, which utilizes a manufactured transition welding piece to convert the welding of two metals with different melting points into the welding of two same materials, improves the welding quality and meets the high-quality welding requirement or the welding requirement of thin and long workpieces.
The invention provides a using method of a high-strength welding device for a copper-aluminum pipeline, which comprises the following steps:
A. manufacturing transition weldments (21) with different diameters for standby according to different pipe diameter requirements, wherein each transition weldment (21) comprises a pure copper part (L1), a pure aluminum part (L2) and a copper-aluminum mixed part (L3), the length of the pure copper part (L1) is larger than that of the pure aluminum part (L2), and welding auxiliary parts (21.1) are arranged at the outer ends of the pure copper part (L1) and the pure aluminum part (L2);
B. installing a transition weldment (21) into the welding actuator:
(1) covering the tetrafluoro clamping flap (13) on a transition welding part (21), then putting the tetrafluoro clamping flap into a transition carrier (14), and clamping the tetrafluoro clamping flap by using a clamping bolt (15);
(2) a ground wire flexible pad (19) and a welding arc protective sleeve (46) are respectively arranged at two ends of the welding arc protective sleeve and are compressed and fixed through a compression bolt (18);
(3) integrally fixed to a welding bracket (43);
C. connecting the welding parts at the two ends:
(1) a feeding cylinder (23) and a sealing piston (24) are assembled into a pneumatic cylinder, and an upper running track (25) is installed;
(2) two pneumatic cylinders are sleeved on the copper pipeline (27) and the aluminum pipeline (29) respectively, and then a second transition carrier (51), a second tetrafluoro clamping flap (50) and a second clamping bolt (52) are fixed on the copper pipeline (27) and the aluminum pipeline (29) through a running track (25);
(3) screwing down the running track (25) and connecting the running track with transition carriers (14) at two ends of a transition welding part (21), so that the welding parts at the two ends are connected, and the manufacturing of the welding actuator is finished;
D. wiring: respectively connecting a first coil and a second coil of a butt welder (48) to binding posts of a copper pipeline and an aluminum pipeline of a welding actuator, communicating argon of the welding actuator with a thermal relay (45) through an argon outlet pipe (22) and a hot argon outlet pipe (44), and controlling the on-off of the thermal relay (45) through the temperature of the argon; different welding temperatures for welding the copper pipeline and the aluminum pipeline are realized through the two secondary coils;
in addition, the argon bottle (40) is communicated with two ends of a transition welding part (21) of the welding actuator through an argon protective gas pipeline (39); connecting an air compressor (30) to pneumatic cylinders of copper pipelines and aluminum pipelines at two ends of a welding actuator through an air storage tank (34) and a welding pneumatic control pipeline (38) to push the copper pipelines and the aluminum pipelines to approach to a transition welding part (21);
E. the welding process is as follows:
(1) firstly, starting an air compressor (30) to enable the pressure in an air storage tank (34) to reach a working standard;
(2) closing the stop valve (31) and stopping the operation of the air compressor (30);
(3) starting a starting button of the butt welding machine (48) to enable the butt welding machine (48) to be in a standby working state;
(4) opening an argon stop valve (41) to enable argon in an argon bottle (40) to continuously supply gas to two ends of a transition welding part (21) of the welding actuator;
(5) after the air at the position to be welded is replaced by argon, a handle (37) is operated to enable the welding parts at two ends to approach to the transition welding part (21), when a proper distance is reached between the copper pipeline or the aluminum pipeline and the transition welding part (21), arc discharge is generated to generate high temperature, the joint of the copper pipeline (27), the aluminum pipeline (29) and the transition welding part (21) generates high temperature and melts, meanwhile, the surrounding argon is heated, at the moment, the argon is output by a welding actuator to be high-temperature gas, when the high-temperature argon enters a thermal relay (45) and reaches a set temperature, the thermal relay (45) automatically cuts off the power, at the moment, the copper pipeline (27) and the aluminum pipeline (29) can continue to approach to the transition welding part (21) and contact under the action of compressed gas at two ends, and then, the temperature at two ends of the transition welding part (21) is reduced due to the power cut off of the thermal relay (45), completing the welding;
F. collecting the pipe:
firstly, cutting off the power supply of a butt welding machine (48);
closing an argon stop valve (41) and stopping the supply of argon;
thirdly, the handle (37) is pushed to the opposite direction, so that the compressed gas of the pneumatic cylinder is discharged into the air from the O cavity, and the force applied by welding is relieved;
fourthly, respectively loosening the clamping bolts on the outer walls of the copper pipeline (27), the aluminum pipeline (29) and the transition welding piece (21) so as to release the clamping force at the three positions;
fifthly, the welded copper pipeline and the welded aluminum pipeline are collected.
Preferably, the wiring in step D comprises the following specific steps:
1) wire connection: wire connection: firstly welding the welding ends c-i, d-g, e-h and f-j in the following sequence: the welding actuator, the thermal relay (45), the butt welder and the two power transmission binding posts a and b are connected to realize two paths of current with the same source, and because of the same phase and the same frequency, the loops are respectively connected to g and h of a transition welding part, so that respective loops are formed;
2) and connecting a protection gas circuit: (1) firstly, connecting a K port of a welding actuator with a shielding gas inlet line (39), and then connecting the K port of the welding actuator with a second pressure gauge (42), an argon stop valve (41) and an argon bottle (40); connecting the welding actuator with a thermal relay (45) by using a hot argon output pipe (44) and an argon outlet pipe (22);
3) and connecting a control gas circuit:
(1) connecting a welding pneumatic control pipeline (38) out from the end part of the welding actuator until the manual reversing valve (36) is located;
(2) a cavity B of a manual reversing valve (36) is blocked by a blind plug (35), then a welding pneumatic control pipeline (38) is connected to the cavity A, and a cavity P is connected with a first pressure gauge (33);
(3) and then the air storage tank (34) is connected, and the stop valve (31) and the air compressor (30) are connected, so that the connection process of the whole process is completed.
Preferably, the both ends of foretell transition welding spare (21) are equipped with welding auxiliary part (21.1), and welding auxiliary part (21.1) includes that outside most advanced discharge ring (21.1.1), middle part borax heat attach district (21.1.2) and inside prevent deforming ring (21.1.3), outside most advanced discharge ring (21.1.1) outwards stretch out the length be greater than inside prevent deforming ring (21.1.3) the length that outwards stretches out, and be equipped with between outside most advanced discharge ring (21.1.1) and inside prevent deforming ring (21.1.3) middle part borax heat attach district (21.1.2), and middle part borax heat attach district (21.1.2) be round arc groove shape.
Preferably, the both ends of foretell transition welding spare (21) are equipped with welding auxiliary part (21.1), welding auxiliary part (21.1) including outside most advanced discharge ring (21.1.1), middle part borax heat attaches district (21.1.2) and inside anti-deformation ring (21.1.3), outside most advanced discharge ring (21.1.1) length of outwards stretching out is greater than inside anti-deformation ring (21.1.3) length of outwards stretching out, and is equipped with middle part borax heat between outer most advanced discharge ring (21.1.1) and inside anti-deformation ring (21.1.3) and attaches district (21.1.2), and middle part borax heat attaches district (21.1.2) and constitutes the round for a plurality of half spherical grooves.
The invention has the beneficial effects that: 1. through the preparation of transition welding spare, reduce the welding degree of difficulty, the concrete expression is in: firstly, two different metal materials are manufactured into an integrated transition welding part, one end of the transition welding part is a pure copper part, and the other end of the transition welding part is a pure aluminum part, so that a copper pipeline and an aluminum pipeline can be respectively welded with the pure copper part and the pure aluminum part of the transition welding part, and the welding strength is greatly improved; welding auxiliary parts at two ends of the transition welding part adopt a special structure, so that welding is facilitated, the forming precision of a welding opening is higher, and the control is easier; 2. the welding actuator is provided with a running track made of polytetrafluoroethylene, and the copper pipeline or the aluminum pipeline is connected with the transition welding part, so that the copper pipeline or the aluminum pipeline is pushed to be close to the transition welding part under the pushing of compressed air, then the copper pipeline and the aluminum pipeline are respectively communicated with two secondary coils separated from the butt welding machine, the welding of the copper pipeline and a pure copper part of the transition welding part and the welding of the aluminum pipeline and a pure aluminum part of the transition welding part are realized under the arc discharge principle, the welding of the same metal is finally realized, and the welding strength is improved; 3. the gas compressor pushes the copper pipeline and the aluminum pipeline to be close to the transition welding part, so that the body health of welding workers is facilitated; 4. the implementation of argon protective gas ensures that the craters formed by aluminum and copper are not easily oxidized, thereby ensuring the welding quality; 5. the thermal relay is matched with the hot argon gas, so that the controllability of the whole welding process is greatly improved, and the welding quality is more reliable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of a butt welding machine;
FIG. 3 is a schematic view of a welding actuator;
FIG. 4 is a schematic structural view of a transition weldment;
FIG. 5 is a cross-sectional view of a weld aid at the end of a first transition weldment;
FIG. 6 is a cross-sectional view of a weld aid at the end of a second transition weldment;
in the upper diagram: silicon steel sheet 1, primary coil 2, binding post 3, current regulating armature 4, silicon steel sheet fixing bracket 5, primary coil 6, secondary coil 7, connecting block 8, regulating screw 9, regulating handle 10, guide rail 11, lifting guide rail fixing bracket 12, tetrafluoro clamping flap 13, transition carrier 14, clamping bolt 15, ground wire binding post 16, wire pressing disc 17, pressing bolt 18, ground wire flexible pad 19, ground wire contact 20, transition welding part 21, argon outlet pipe 22, feeding cylinder 23, sealing piston 24, running rail 25, pneumatic control pipeline 26, copper pipeline 27, pneumatic pipeline 28, aluminum pipeline 29, air compressor 30, stop valve 31, safety valve 32, first pressure gauge 33, air storage tank 34, blind plug 35, manual reversing valve 36, handle 37, welding pneumatic control pipeline 38, argon protection gas pipeline 39, argon gas bottle 40, argon stop valve 41, second pressure gauge 42, safety valve 42, argon protection gas bottle 34, argon protection gas bottle 40, argon gas bottle stop valve 41, and the like, Welding support 43, hot argon output tube 44, thermal relay 45, welding arc lag 46, fixed lantern ring 47, butt welder 48, welding executor, second tetrafluoro centre gripping lamella 50, second transition carrier 51, second centre gripping bolt 52, welding auxiliary part 21.1, outside point discharge ring 21.1.1, middle part borax heat attach district 21.1.2 and inside anti-deformation ring 21.1.3, hemisphere groove 21.1.4.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to the attached drawing 1, the invention provides a high-strength welding device for copper-aluminum pipelines, which adopts the technical scheme that: the device comprises a butt welding machine 48, a thermal relay 45, a welding actuator, a transition welding part 21, a welding bracket 43, an argon protection device and a pneumatic propulsion device, wherein the transition welding part 21 is arranged in the welding actuator which is fixed on the welding bracket 43, one end of the transition welding part 21 corresponds to a copper pipeline 27, and the other end of the transition welding part corresponds to an aluminum pipeline 29; the outer side of the copper pipeline 27 and the outer side of the aluminum pipeline 29 are respectively connected with a pneumatic propulsion device, the copper pipeline 27 and the aluminum pipeline 29 are pushed by the pneumatic propulsion device to move to the transition welding part 21, meanwhile, the butt welding machine 48 welds the copper pipeline 27 and one end of the transition welding part 21, and welds the aluminum pipeline 29 and the other end of the transition welding part 21; the welding executor is connected with an argon protection device, argon protection is carried out on the welding process through the argon protection device, the thermal relay 45 is communicated with the welding part through a thermal argon output pipe 44, and the on-off of the thermal relay 45 is controlled through the temperature of argon.
Referring to the attached figure 2, the butt welding machine 48 of the invention comprises a silicon steel sheet 1, a primary coil 2, a binding post 3, a current regulating armature 4, a silicon steel sheet fixing support 5, a primary coil 6, a secondary coil 7, a connecting block 8, a regulating screw 9, a regulating handle 10, a guide rail 11 and a lifting guide rail fixing support 12, wherein the silicon steel sheet 1 is installed in the middle of the silicon steel sheet fixing support 5, the primary coil 2 is wound on the silicon steel sheet 1, the guide rail 11 and a secondary coil winding rod are respectively installed on two sides of the silicon steel sheet 1, the current regulating armature 4 is respectively installed in the guide rail 11, and the current regulating armature 4 is matched and regulated through the regulating screw 9 and the lifting guide rail fixing support 12 which are connected at; and the secondary winding rod is respectively wound with a first secondary winding 6 and a second secondary winding 7, and it needs to be explained that: the melting point of copper is 1083 degrees, the melting point of aluminum is 660 degrees, so that the requirement of the melting points of two metals is met by adjusting two coils, and the length of the large-current adjusting armature 4 is adjusted by adjusting the adjusting screw 9 on one side of the primary coil, so that the contact ratio is increased, the current is increased, the magnetic flux is increased, and the requirement of welding energy of a copper pipeline is met; the armature is adjusted by the current on one side of the secondary coil, so that the coincidence degree is reduced, the current is reduced, and the magnetic flux is reduced, thereby meeting the welding energy requirement of the aluminum pipeline.
Referring to fig. 3, the welding actuator of the present invention includes a transition weld assembly fixing device, a copper pipeline pushing device and an aluminum pipeline pushing device, wherein the copper pipeline pushing device is disposed at one end of the transition weld assembly fixing device, and the aluminum pipeline pushing device is disposed at the other end; the transition welding part fixing device comprises a tetrafluoro clamping flap 13, a transition carrier 14, a clamping bolt 15, a wire pressing disc 17, a compression bolt 18 and a ground wire flexible pad 19, the tetrafluoro clamping flap 13 is arranged on the outer side of the transition welding part 21, the tetrafluoro clamping flap 13 and the transition carrier 14 are fixedly connected through the clamping bolt 15, and two ends of the transition carrier 14 are fixed with a welding arc protection sleeve 46 through the ground wire flexible pad 19 and a ground wire binding post 16 through the compression bolt 18.
The copper pipeline pushing device comprises a feeding cylinder 23, a sealing piston 24, a running track 25, a pneumatic control pipeline 26, a pneumatic pipeline 28, a second tetrafluoro clamping flap 50, a second transition carrier 51 and a second clamping bolt 52, wherein the second tetrafluoro clamping flap 50 is sleeved on the outer side of a copper pipeline 27, the second tetrafluoro clamping flap 50 is fixedly connected with the second transition carrier 51 sleeved on the outer side through the second clamping bolt 52, and the pneumatic cylinder consisting of the feeding cylinder 23 and the sealing piston 24 is arranged on the outer side of the second transition carrier 51; the second transition carrier 51 is connected with the pneumatic cylinder through the operation track 25, the inner end of the operation track 25 is movably connected with the wire pressing disc 17 of the transition welding part fixing device, and when the compressed gas pushes the sealing piston 24, the second transition carrier 51 fixed on the outer wall of the copper pipeline is pushed to be close to the transition welding part 21 along the operation track 25.
The lower end of the second transition carrier 51 is connected with the terminal i through a polytetrafluoroethylene ring, a fixed lantern ring 47 and an argon outlet pipe 22 are arranged on the lower side of the polytetrafluoroethylene ring, and the outer end of the argon outlet pipe 22 is connected with a hot argon output pipe 44; the argon outlet pipe 22 and the hot argon outlet pipe 44 conduct heated argon between the copper line and the transition weld out into a thermal relay 45.
The inner end of the ground wire binding post 16 is provided with a ground wire contact 20, and one side of the welding arc protection sleeve 46 is provided with a wire pressing disc 17; the running rail 25 is made of polytetrafluoroethylene, so that current of a copper pipeline or an aluminum pipeline is prevented from being conducted to the transition welding part 21.
In addition, the structure of the aluminum pipeline pushing device is the same as that of the copper pipeline pushing device, and the difference is that the melting point of aluminum is low, so that the current from the butt welding machine is small, two independent loops are formed for the butt welding machine, the copper pipeline is welded with the pure copper part of the transition welding piece, the aluminum pipeline is welded with the pure aluminum part of the transition welding piece, and the strong welding strength is realized.
Referring to fig. 4, the transition welding part 21 of the present invention includes a pure copper part L1, a pure aluminum part L2, and a copper-aluminum mixed part L3, wherein the length of the pure copper part L1 is greater than the length of the pure aluminum part L2, and welding auxiliary parts 21.1 are disposed at the outer ends of the pure copper part L1 and the pure aluminum part L2.
In addition, referring to fig. 4 and 5, welding auxiliary portion 21.1 includes that outer tip discharge ring 21.1.1, middle part borax thermally adhere district 21.1.2 and inside shape ring 21.1.3 of preapring for an unfavorable turn of events, the length that outer tip discharge ring 21.1.1 outwards stretched out is greater than the length that inside shape ring 21.1.3 outwards stretched out, and is equipped with middle part borax thermally adhere district 21.1.2 between outer tip discharge ring 21.1.1 and the inside shape ring 21.1.3 of preapring for an unfavorable turn of events, and middle part borax thermally adheres district 21.1.2 is the shape of a round arc groove.
The principle of the special structure of the welding aids 21.1 is:
1. in the manufacturing process of the transition welding part 21, the arc of the end part is kept slightly convex outside, slightly low inside and arc-shaped special welding interface in the middle, and the fundamental reason for doing so is that: determined by the arc discharge principle and the welding principle of metals. When the craters are close to each other, a so-called "tip discharge" is formed due to the accumulation of charge, in which the outer protruding outer tip discharge ring 21.1.1 discharges and melts first with the outer edge of the copper or aluminum pipeline, and the central borax heat attachment zone 21.1.2 in the center of the transition weldment 21 takes the shape of an arc-shaped groove, which becomes the best weld pool, and at the same time, as the applied forces and temperature increase, so that a perfect weld is formed, namely: can weld through and be unlikely to weld and leak, simultaneously, the extension length of inside shape ring 21.1.3 of preapring for an unfavorable turn of events is less than outside point discharge ring 21.1.1, like this, makes inside shape ring 21.1.3 of preapring for an unfavorable turn of events can not warp to guarantee that the internal diameter of the crater of welded copper aluminium pipe can not be outstanding, the variable of avoiding influencing the inside passageway is less.
The invention provides a using method of a high-strength welding device for a copper-aluminum pipeline, which comprises the following steps:
A. manufacturing transition weldments 21 with different diameters for standby according to different pipe diameter requirements, wherein each transition weldment 21 comprises a pure copper part L1, a pure aluminum part L2 and a copper-aluminum mixing part L3, the length of the pure copper part L1 is larger than that of the pure aluminum part L2, and welding auxiliary parts 21.1 are arranged at the outer ends of the pure copper part L1 and the pure aluminum part L2;
B. installing the transition weldment 21 into the welding actuator:
(1) covering the tetrafluoro clamping flap 13 on the transition welding part 21, then putting the tetrafluoro clamping flap into the transition carrier 14, and clamping the tetrafluoro clamping flap by using the clamping bolt 15;
(2) the two ends are respectively provided with a ground wire flexible pad 19 and a welding arc protective sleeve 46 which are pressed and fixed through a pressing bolt 18;
(3) integrally fixed to the welding bracket 43;
C. connecting the welding parts at the two ends:
(1) the feeding cylinder 23 and the sealing piston 24 are assembled into a pneumatic cylinder, and an upper running track 25 is installed;
(2) two pneumatic cylinders are sleeved on the copper pipeline 27 and the aluminum pipeline 29 respectively, and then a second transition carrier 51, a second tetrafluoro clamping flap 50 and a second clamping bolt 52 are fixed on the copper pipeline 27 and the aluminum pipeline 29 through the running track 25;
(3) screwing down the running rail 25 and connecting the running rail to the transition carriers 14 at two ends of the transition welding part 21, so that the welding parts at two ends are connected, and the manufacturing of the welding actuator is finished;
D. wiring: respectively connecting a first coil and a second coil of a butt welder 48 to binding posts of a copper pipeline and an aluminum pipeline of a welding actuator, communicating argon of the welding actuator with a thermal relay 45 through an argon outlet pipe 22 and a hot argon outlet pipe 44, and controlling the on-off of the thermal relay 45 through the temperature of the argon; different welding temperature requirements for welding the copper pipeline and the aluminum pipeline are met through different currents output by the two secondary coils;
in addition, an argon bottle 40 is communicated with the two ends of the transition welding part 21 of the welding actuator through an argon protective gas pipeline 39; connecting an air compressor 30 to pneumatic cylinders of copper and aluminum lines at both ends of the weld actuator via an air reservoir 34 and a weld pneumatic control line 38, pushing the copper and aluminum lines closer to the transition weldment 21;
E. the welding process is as follows:
(1) starting the air compressor 30 to make the pressure in the air storage tank 34 reach the working standard;
(2) closing the cut-off valve 31 and stopping the operation of the air compressor 30;
(3) starting a start button of the butt welding machine 48 to enable the butt welding machine 48 to be in a standby working state;
(4) opening an argon stop valve 41 to enable argon in an argon bottle 40 to continuously supply gas to two ends of a transition welding part 21 of the welding actuator;
(5) after the air at the position to be welded is replaced by argon, the handle 37 is operated to enable the welding parts at the two ends to approach the transition welding part 21, when the copper pipeline or the aluminum pipeline and the transition welding part 21 reach a proper distance, arc discharge is generated, high temperature is generated, the joint of the copper pipeline 27, the aluminum pipeline 29 and the transition welding part 21 generates high temperature and is melted, meanwhile, the surrounding argon is heated, at the moment, the argon is output as high-temperature gas by a welding actuator, when the high-temperature argon enters the thermal relay 45 and reaches a set temperature, the thermal relay 45 is automatically powered off, at the moment, the copper pipeline 27 and the aluminum pipeline 29 continue to approach the transition welding part 21 and contact with the transition welding part under the action of the compressed gas at the two ends, and then, the temperature at the two ends of the transition welding part 21 is reduced due to the power off of the thermal relay 45, so;
F. collecting the pipe:
firstly, cutting off the power supply of the butt welding machine 48;
closing the argon stop valve 41 and stopping the supply of argon;
thirdly, the handle 37 is pushed to the opposite direction, so that the compressed gas of the pneumatic cylinder is discharged into the air from the O cavity, and the force applied by welding is relieved;
fourthly, respectively loosening the copper pipeline 27, the aluminum pipeline 29 and the clamping bolts on the outer wall of the transition welding part 21 so as to release the clamping force at three positions;
fifthly, the welded copper pipeline and the welded aluminum pipeline are collected.
It should be noted that:
the wiring in the step D comprises the following specific steps:
1) wire connection: firstly welding the welding ends c-i, d-g, e-h and f-j in the following sequence: the welding actuator, the thermal relay 45, the butt welder and the two power transmission binding posts a and b are connected to realize two paths of current with the same source, and because of the same phase and the same frequency, the loops are respectively connected to g and h of a transition welding part, so that respective loops are formed;
2) and connecting a protection gas circuit: firstly, connecting a K port of a welding actuator with a shielding gas inlet line 39, and then connecting the K port of the welding actuator with a second pressure gauge 42, an argon stop valve 41 and an argon bottle 40; the welding actuator is connected with a thermal relay 45 by a hot argon output pipe 44 and an argon outlet pipe 22;
3) and connecting a control gas circuit:
(1) tapping the welding pneumatic control line 38 from the end of the welding actuator to the position of the manual diverter valve 36;
(2) the cavity B of the manual reversing valve 36 is blocked by a blind plug 35, then a welding pneumatic control pipeline 38 is connected to the cavity A, and the cavity P is connected with a first pressure gauge 33;
(3) the air storage tank 34 is connected next, and the stop valve 31 and the air compressor 30 are connected, so that the whole process is completed.
Example 2, the difference from example 1 is: referring to fig. 6, the welding auxiliary part 21.1 of the transition welding part 21 of the present invention adopts another structure, specifically: foretell welding auxiliary part 21.1 includes that outside point discharge ring 21.1.1, middle part borax thermally attached district 21.1.2 and inside shape ring 21.1.3 of preapring for an unfavorable turn of events, the length that outside point discharge ring 21.1.1 outwards stretched out is greater than the outside length that stretches out of inside shape ring 21.1.3 of preapring for an unfavorable turn of events, and is equipped with middle part borax thermally attached district 21.1.2 between outside point discharge ring 21.1.1 and the inside shape ring 21.1.3 of preapring for an unfavorable turn of events, and middle part borax thermally attached district 21.1.2 constitutes the round for a plurality of hemisphere shape grooves 21.1.4.
This structure also can satisfy that the outside convex outside point discharge ring 21.1.1 discharges with the outside edge of copper pipeline or aluminium pipeline at first, and melt, and middle part borax heat attaches district 21.1.2 at the center of transition welding piece 21 adopts the shape of round hemisphere groove, then becomes better molten bath, and simultaneously, along with the rising of external force and temperature, so, just can form perfect welding seam just, simultaneously, the extension length of inside shape ring 21.1.3 of preapring for an unfavorable turn of events is less than outside point discharge ring 21.1.1, so, make inside shape ring 21.1.3 of preapring for an unfavorable turn of events indeformable, thereby guarantee that the internal diameter of the crater of copper aluminium pipe after the welding can not be outstanding, it is less to avoid influencing the variable of inside passageway.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (4)
1. A use method of a high-strength welding device for copper-aluminum pipelines is characterized by comprising the following steps:
A. manufacturing transition weldments (21) with different diameters for standby according to different pipe diameter requirements, wherein each transition weldment (21) comprises a pure copper part (L1), a pure aluminum part (L2) and a copper-aluminum mixed part (L3), the length of the pure copper part (L1) is larger than that of the pure aluminum part (L2), and welding auxiliary parts (21.1) are arranged at the outer ends of the pure copper part (L1) and the pure aluminum part (L2);
B. installing a transition weldment (21) into the welding actuator:
(1) covering the tetrafluoro clamping flap (13) on a transition welding part (21), then putting the tetrafluoro clamping flap into a transition carrier (14), and clamping the tetrafluoro clamping flap by using a clamping bolt (15);
(2) a ground wire flexible pad (19) and a welding arc protective sleeve (46) are respectively arranged at two ends of the welding arc protective sleeve and are compressed and fixed through a compression bolt (18);
(3) integrally fixed to a welding bracket (43);
C. connecting the welding parts at the two ends:
(1) a feeding cylinder (23) and a sealing piston (24) are assembled into a pneumatic cylinder, and an upper running track (25) is installed;
(2) two pneumatic cylinders are sleeved on the copper pipeline (27) and the aluminum pipeline (29) respectively, and then a second transition carrier (51), a second tetrafluoro clamping flap (50) and a second clamping bolt (52) are fixed on the copper pipeline (27) and the aluminum pipeline (29) through a running track (25);
(3) screwing down the running track (25) and connecting the running track with transition carriers (14) at two ends of a transition welding part (21), so that the welding parts at the two ends are connected, and the manufacturing of the welding actuator is finished;
D. wiring: respectively connecting a first coil and a second coil of a butt welder (48) to binding posts of a copper pipeline and an aluminum pipeline of a welding actuator, communicating argon of the welding actuator with a thermal relay (45) through an argon outlet pipe (22) and a hot argon outlet pipe (44), and controlling the on-off of the thermal relay (45) through the temperature of the argon; different welding temperatures for welding the copper pipeline and the aluminum pipeline are realized through the two secondary coils;
in addition, the argon bottle (40) is communicated with two ends of a transition welding part (21) of the welding actuator through an argon protective gas pipeline (39); connecting an air compressor (30) to pneumatic cylinders of copper pipelines and aluminum pipelines at two ends of a welding actuator through an air storage tank (34) and a welding pneumatic control pipeline (38) to push the copper pipelines and the aluminum pipelines to approach to a transition welding part (21);
E. the welding process is as follows:
(1) firstly, starting an air compressor (30) to enable the pressure in an air storage tank (34) to reach a working standard;
(2) closing the stop valve (31) and stopping the operation of the air compressor (30);
(3) starting a starting button of the butt welding machine (48) to enable the butt welding machine (48) to be in a standby working state;
(4) opening an argon stop valve (41) to enable argon in an argon bottle (40) to continuously supply gas to two ends of a transition welding part (21) of the welding actuator;
(5) after the air at the position to be welded is replaced by argon, a handle (37) is operated to enable the welding parts at two ends to approach to the transition welding part (21), when a proper distance is reached between the copper pipeline or the aluminum pipeline and the transition welding part (21), arc discharge is generated to generate high temperature, the joint of the copper pipeline (27), the aluminum pipeline (29) and the transition welding part (21) generates high temperature and melts, meanwhile, the surrounding argon is heated, at the moment, the argon is output by a welding actuator to be high-temperature gas, when the high-temperature argon enters a thermal relay (45) and reaches a set temperature, the thermal relay (45) automatically cuts off the power, at the moment, the copper pipeline (27) and the aluminum pipeline (29) can continue to approach to the transition welding part (21) and contact under the action force of compressed gas at two ends, and then, the temperature at two ends of the transition welding part (21) is reduced due to the power cut off of the thermal relay (45), completing the welding;
F. collecting the pipe:
firstly, cutting off the power supply of a butt welding machine (48);
closing an argon stop valve (41) and stopping the supply of argon;
thirdly, the handle (37) is pushed to the opposite direction, so that the compressed gas of the pneumatic cylinder is discharged into the air from the O cavity, and the force applied by welding is relieved;
fourthly, respectively loosening the clamping bolts on the outer walls of the copper pipeline (27), the aluminum pipeline (29) and the transition welding piece (21) so as to release the clamping force at the three positions;
fifthly, the welded copper pipeline and the welded aluminum pipeline are collected.
2. The use method of the high-strength welding device for the copper-aluminum pipeline as claimed in claim 1, which is characterized in that: the wiring in the step D comprises the following specific steps:
1) wire connection: firstly welding the welding ends c-i, d-g, e-h and f-j in the following sequence: the welding actuator, the thermal relay (45), the butt welder and the two power transmission binding posts a and b are connected to realize two paths of current with the same source, and because of the same phase and the same frequency, the loops are respectively connected to g and h of a transition welding part, so that respective loops are formed;
2) and connecting a protection gas circuit: (1) firstly, connecting a K port of a welding actuator with a shielding gas inlet line (39), and then connecting the K port of the welding actuator with a second pressure gauge (42), an argon stop valve (41) and an argon bottle (40); connecting the welding actuator with a thermal relay (45) by using a hot argon output pipe (44) and an argon outlet pipe (22);
3) and connecting a control gas circuit:
(1) connecting a welding pneumatic control pipeline (38) out from the end part of the welding actuator until the manual reversing valve (36) is located;
(2) a cavity B of a manual reversing valve (36) is blocked by a blind plug (35), then a welding pneumatic control pipeline (38) is connected to the cavity A, and a cavity P is connected with a first pressure gauge (33);
(3) and then the air storage tank (34) is connected, and the stop valve (31) and the air compressor (30) are connected, so that the connection process of the whole process is completed.
3. The use method of the high-strength welding device for the copper-aluminum pipeline as claimed in claim 1, which is characterized in that: transition welding spare (21) both ends be equipped with welding auxiliary part (21.1), welding auxiliary part (21.1) include outside most advanced discharge ring (21.1.1), middle part borax heat attaches district (21.1.2) and inside prevents deformation ring (21.1.3), outside most advanced discharge ring (21.1.1) length of outwards stretching out is greater than inside and prevents deformation ring (21.1.3) length of outwards stretching out, and is equipped with middle part borax heat between outside most advanced discharge ring (21.1.1) and inside and prevents deformation ring (21.1.3) and attaches district (21.1.2), middle part borax heat attaches district (21.1.2) and is round arc groove shape.
4. The use method of the high-strength welding device for the copper-aluminum pipeline as claimed in claim 1, which is characterized in that: transition welding spare (21) both ends be equipped with welding auxiliary part (21.1), welding auxiliary part (21.1) including outside most advanced discharge ring (21.1.1), middle part borax heat attaches district (21.1.2) and inside anti-deformation ring (21.1.3), outside most advanced discharge ring (21.1.1) length that outwards stretches out is greater than inside anti-deformation ring (21.1.3) length that outwards stretches out, and is equipped with between outside most advanced discharge ring (21.1.1) and inside anti-deformation ring (21.1.3) middle part borax heat attaches district (21.1.2), middle part borax heat attaches district (21.1.2) and constitutes the round for a plurality of half spherical grooves.
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