CN115533382A - Aluminum alloy microchannel heat exchanger pre-welding treatment device and diffusion welding method thereof - Google Patents
Aluminum alloy microchannel heat exchanger pre-welding treatment device and diffusion welding method thereof Download PDFInfo
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- CN115533382A CN115533382A CN202211314149.8A CN202211314149A CN115533382A CN 115533382 A CN115533382 A CN 115533382A CN 202211314149 A CN202211314149 A CN 202211314149A CN 115533382 A CN115533382 A CN 115533382A
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- 238000003466 welding Methods 0.000 title claims abstract description 57
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 21
- 238000009792 diffusion process Methods 0.000 title claims description 14
- 238000003756 stirring Methods 0.000 claims description 25
- 238000004140 cleaning Methods 0.000 claims description 15
- 238000005498 polishing Methods 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000000354 decomposition reaction Methods 0.000 claims description 9
- 150000004678 hydrides Chemical class 0.000 claims description 9
- 239000012280 lithium aluminium hydride Substances 0.000 claims description 9
- 244000309464 bull Species 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- -1 lithium aluminum hydride Chemical compound 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- 229910010199 LiAl Inorganic materials 0.000 claims description 3
- 229910010084 LiAlH4 Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 235000019441 ethanol Nutrition 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000000197 pyrolysis Methods 0.000 claims description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 3
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 3
- 239000011090 solid board Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 9
- 239000000243 solution Substances 0.000 description 32
- 238000003825 pressing Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B08B1/12—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/002—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
Abstract
The invention discloses a pre-welding treatment device for an aluminum alloy micro-channel heat exchanger, which comprises a shell, wherein a group of guide rings are arranged on the outer side of the shell. The bolt is arranged, so that a worker can rotate the bolt according to the actual requirement, the bolt is pulled out from the positioning hole at the corresponding position under the action of external force, the fixing effect on the fixing plate is relieved, then the power-assisted rod is pushed, the power-assisted rod drives the guide plate and the arc plate to rotate under the support of the guide ring through the connecting block under the action of the external force, the worker needs to tighten the bolt after the power-assisted rod rotates to a proper angle, the bolt is inserted into the inner side of the positioning hole at the corresponding position to fix the fixing plate under the action of the thread of the fixing hole, and the power-assisted rod can be stably fixed at the position for the worker to use.
Description
Technical Field
The invention relates to the technical field of a pre-welding treatment device, in particular to a pre-welding treatment device of an aluminum alloy micro-channel heat exchanger and a diffusion welding method thereof.
Background
The pretreatment device for welding is an indispensable device in the pretreatment work of the aluminum alloy micro-channel heat exchanger before welding, and can polish the aluminum alloy micro-channel heat exchanger under the operation of workers, and can help the workers to perform diffusion welding work on the aluminum alloy micro-channel heat exchanger under the operation of the workers.
The prior pre-welding treatment device has the following defects:
1. the traditional device is not perfect enough, does not have a facility which can facilitate the staff to adjust the angle of the power-assisted rod, and is relatively rigid.
2. The traditional device is not perfect enough, does not have a facility which can facilitate the preparation of the solution by the working personnel, and has single function.
3. The traditional device is not perfect enough, does not have the facility that can conveniently clean the produced piece of polishing, and is troublesome.
4. The traditional device is not perfect enough, does not have a facility which can conveniently smear solution on the surface of a workpiece, and is troublesome in price comparison.
Disclosure of Invention
The invention aims to provide a device for treating an aluminum alloy micro-channel heat exchanger before welding, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a pre-welding treatment device for an aluminum alloy microchannel heat exchanger comprises a shell, wherein a group of guide rings are arranged on the outer side of the shell;
the opposite surfaces of the guide rings are provided with guide grooves, guide plates are embedded and installed on the inner sides of the guide grooves, an arc plate is installed on one side of each guide plate, a connecting block is installed on the front surface of each guide plate, a fixing plate is installed on the front surface of each arc plate, fixing holes are formed in the fixing plate in a penetrating mode, a positioning hole is formed in one guide ring in a penetrating mode, bolts are installed on the positioning holes and the fixing holes in a penetrating mode through threads, and a power assisting rod is installed on the front surface of each connecting block;
the utility model discloses a funnel, including shell, pull ring, hopper, funnel, hopper, casing, pull ring, casing, end storehouse, the guard shield is installed to the bottom of shell, the end storehouse is installed to the bottom of guard shield, the funnel is installed at the top in end storehouse, the top in end storehouse is run through and is installed the stopper, the pull ring is installed at the top of stopper, and the stopper is located the inboard of funnel, one side and the front in end storehouse are run through and are installed the screwed pipe.
Preferably, the end shell is installed at the shell top, and the top of end shell is run through and is installed the block, and the handle is installed at the back of shell, and the end is installed at the back of handle, and the switch is installed at the top of handle, and the front and the back mounted of handle have the bull stick, and the extension board is installed in the outside of bull stick, and the clamp plate is installed at the top of extension board, and the gag lever post is installed to the bottom of clamp plate, and a set of fagging is installed at the top of handle, and the bull stick is installed in the inside run through of fagging, and the low board is installed in the outside of bull stick, and the top of low board is located the front of gag lever post.
Preferably, the bottom of the shell is provided with a shield, the inner side of the shell is provided with a motor, the output end of the motor penetrates through the bottom bin through a bearing to be provided with a transmission rod, the bottom of the transmission rod is provided with a chassis, and the bottom of the chassis is provided with a polishing disc.
Preferably, the outer side of the threaded pipe is provided with a threaded cover in a threaded manner, the two sides of the transmission rod are provided with stirring frames, and the inner side of each stirring frame is provided with a stirring plate.
Preferably, the top part of the handle is positioned on a straight surface;
the switch is positioned on the top of the straight surface on the top of the handle;
the chassis is positioned at the bottom of the bottom bin.
Preferably, one side of the bottom bin is provided with a group of supporting blocks, the bottom of one supporting block and the back of the other supporting block are provided with supporting rods, the bottom of each supporting rod is provided with a supporting strip, and the bottom of each supporting strip is provided with a brush.
Preferably, an electric rod is installed at the top of the supporting block, a connecting plate is installed on one side of the electric rod, a connecting plate is installed at the bottom of the connecting plate, a filling hopper is installed at the bottom of the connecting plate, a fixing plate is installed on the outer side of the filling hopper, and a sponge is installed at the bottom of the fixing plate.
Preferably, the diffusion welding method of the pre-welding treatment device is as follows;
s1, mechanically polishing the surface before welding: mechanically polishing the to-be-welded surface of the 5050 aluminum alloy to a roughness Ra0.2;
s2, cleaning process before welding: cleaning oil stains on the surface with absolute ethyl alcohol, cleaning with 10 wt% sodium hydroxide solution at 50 ℃ for 60s, cleaning the surface with water, pickling with dilute hydrochloric acid solution for 20s, and performing ultrasonic cleaning for 5min after the water cleaning and the prevention of the oil stains in the alcohol solution;
s3, preparing a surface hydride solution: mixing 99.99% purity lithium aluminum hydride powder in tetrahydrofuran organic solution with concentration ratios of 1mol/L, 1.5mol/L and 2.4mol/L to prepare hydride solution, and uniformly coating oily organic solvent on the surface of the aluminum alloy to be welded;
s4, diffusion welding process: loading the part into a diffusion welding furnace, wherein a build-up welding layer mica is paved between an upper pressure head and a lower pressure head and between work pieces, stacking the work piece laminates, coating hydride on the surface to be welded, and presetting the pressure to 0.5MPa to position the work pieces; closing the furnace door, vacuumizing the furnace chamber, and starting heating when the vacuum degree is reduced to 5E-3 Pa; when the temperature of the workpiece reaches 400 ℃, keeping the temperature for 30min, then continuing to heat to 500, 520 and 530 ℃, keeping the temperature for 1, 1.5 and 2h, applying welding pressure of 2, 3 and 4MPa, and then removing the pressure and cooling to room temperature along with the furnace.
Preferably, in step S4, the method further includes the steps of:
s41, by adopting the method for welding, the surface pretreatment of the large-size part can be realized, the process is simple, and the extra equipment and manpower cost are not required to be added; low-temperature welding can be realized, and the heat damage of the parent metal is weakened; the decomposition equation of the welding interface due to the pyrolysis of AlLiH4 is as follows:
3LiAlH4→Li3AlH6+2Al+3H2↑
2Li3AlH6→6LiH+2Al+3H2↑
2LiH+2Al→2LiAl+H2↑
And removing surface oxides by using local reducing atmosphere of the interface, thereby reducing the welding temperature and realizing low-temperature reliable connection.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the guide ring is arranged, the guide ring can provide a space for the guide groove under the support of the shell, the guide groove can provide a moving guide effect for the guide plate, the guide plate can provide a support for the arc plate, the arc plate can stably support the fixed plate, and the guide ring can provide a space for the positioning hole.
2. According to the invention, the bottom bin is arranged, the shell can provide stable support for the shield, so that the shield can stably support the bottom bin, the bottom bin can provide a temporary storage space and a stirring space for a solution, a worker can pull out the plug through the pull ring according to the requirement of actual conditions to realize the function of opening the top opening of the bottom bin, then the worker can inject the solution with corresponding proportion into the inner side of the bottom bin from the hopper and the opened opening, then the worker needs to start the motor, the motor drives the stirring frame and the stirring plate to rotate together through the transmission rod, so that the stirring frame and the stirring plate can stir the solution filled in the inner side of the bottom bin to prepare, after the preparation is completed, the worker can rotate the threaded cover close to the front side to take the threaded pipe close to the front side to realize the function of opening the threaded pipe close to the front side, so that the prepared solution in the inner side of the bottom bin can be discharged to the outside from the threaded pipe to be received by the worker, and the device can be convenient for the worker to prepare the solution.
3. According to the invention, the supporting block is arranged, the bottom bin can stably support the supporting block under the support of the protective cover, the supporting block can provide stable support for the supporting rod, the supporting rod can stably support the brush through the supporting strip, the brush has certain elasticity and can deform under the action of external force, and a worker can move the device according to the requirement of actual conditions, so that the bottom bin drives the brush to move together under the support of the supporting rod and the supporting strip through the supporting block under the action of external force, and the brush cleans the scraps generated by polishing the workpiece under the action of external force, so that the device can conveniently clean the polishing scraps on the surface of the workpiece by the worker, and provides convenience for the worker.
4. According to the invention, the sponge is arranged, the support block can stably support the electric rod under the support of the bottom bin, the electric rod can stretch out and draw back under the operation of a worker, the worker can open the threaded cover close to one side according to the actual condition, so that the solution prepared at the inner side of the bottom bin can flow out of the threaded pipe close to one side to the inner side of the filling hopper, meanwhile, the worker can control the electric rod to contract or extend according to the actual condition, the electric rod drives the fixing plate and the sponge to move up and down together through the connecting plate and the connecting plate, the sponge can be adjusted to a proper height position, meanwhile, the sponge can absorb the solution at the inner side of the filling hopper, the sponge is contacted with a workpiece when the worker moves the device, the solution absorbed by the sponge can be wiped on the surface of the workpiece, and therefore, the device can facilitate the worker to wipe the prepared solution on the surface of the workpiece, and convenience is provided for the worker.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a perspective view of the electric pole of the present invention;
FIG. 3 is a schematic perspective view of an arc plate according to the present invention;
FIG. 4 is a schematic perspective view of a strut according to the present invention;
FIG. 5 is a schematic perspective view of a stirring frame according to the present invention;
FIG. 6 is a schematic view of the structure of the hopper of the present invention;
FIG. 7 is a schematic view of a stop lever according to the present invention;
fig. 8 is a flow chart of the operation of the present invention.
In the figure: 1. a housing; 2. an end shell; 3. blocking a net; 4. a handle; 5. a tip; 6. a switch; 7. rotating the rod; 8. a support plate; 9. pressing a plate; 10. a limiting rod; 11. a supporting plate; 12. a rotating rod; 13. a lower plate; 14. a motor; 15. a shield; 16. a bottom bin; 17. a transmission rod; 18. a chassis; 19. grinding disc; 20. a guide ring; 21. a guide groove; 22. a guide plate; 23. an arc plate; 24. connecting blocks; 25. a fixing plate; 26. hole fixing; 27. positioning holes; 28. a bolt; 29. a booster lever; 30. a stirring frame; 31. a stirring plate; 32. a funnel; 33. a plug; 34. a pull ring; 35. a threaded pipe; 36. a threaded cap; 37. supporting a block; 38. a strut; 39. a stay; 40. a brush; 41. an electric rod; 42. connecting plates; 43. connecting a plate; 44. filling a hopper; 45. fixing the plate; 46. a sponge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Referring to fig. 1 and 7, an embodiment of the present invention: the anti-blocking device comprises a shell 1, an end shell 2 is installed on the top of the shell 1, a blocking net 3 is installed on the top of the end shell 2 in a penetrating mode, a handle 4 is installed on the back of the shell 1, an end 5 is installed on the back of the handle 4, a switch 6 is installed on the top of the handle 4, rotary rods 7 are installed on the front face and the back face of the handle 4, support plates 8 are installed on the outer sides of the rotary rods 7, pressure plates 9 are installed on the top of the support plates 8, limiting rods 10 are installed at the bottoms of the pressure plates 9, a group of support plates 11 are installed on the top of the handle 4, rotary rods 12 are installed inside the support plates 11 in a penetrating mode, low plates 13 are installed on the outer sides of the rotary rods 12, the top ends of the low plates 13 are located on the front faces of the limiting rods 10, the shell 1 can provide stable support for the end shell 2, the end shell 2 can be matched with the shell 1 to provide protection for all devices installed on the inner side of the shell, a motor 14 can be stably supported by the shell 1, the end shell 2 can provide a space for the blocking net 3, the barrier net 3 can provide a circulation channel for air, heat generated by the operation of the motor 14 can be discharged to the outside from the channel, a worker can pull the pressing plate 9 according to the needs of actual conditions, the pressing plate 9 drives the support plate 8 to rotate clockwise around the rotary rod 7 under the action of external force, the limiting rod 10 is separated from the lower plate 13, the lower plate 13 can rotate clockwise around the rotary rod 12 under the action of gravity and the support of the support plate 11 and is placed on the top of the handle 4, the position limitation on the pressing plate 9 is removed, the worker can hold the handle 4 to extrude the pressing plate 9, the pressing plate 9 rotates the extrusion switch 6 anticlockwise around the rotary rod 7 under the action of external force, the device is started, the outer side of the shell 1 is provided with a group of guide rings 20, the bottom of the shell 1 is provided with a shield 15, the inner side of the shell 1 is provided with the motor 14, the output of motor 14 runs through end storehouse 16 through the bearing and installs transfer line 17, chassis 18 is installed to the bottom of transfer line 17, polishing dish 19 is installed to the bottom of chassis 18, shell 1 can provide firm support for guide ring 20, and can firmly support guard shield 15, guard shield 15 can provide rotation space and guard action for all facilities of its inboard installation, switch 6 can be under staff's operation control motor 14's operation, can drive chassis 18 and polishing dish 19 through transfer line 17 under shell 1's support after motor 14 starts and rotate under the rotation support of bearing, make polishing dish 19 can carry out polishing work when contacting with the work piece, the top part position of handle 4 is straight face, switch 6 is located the straight face top at handle 4 top, chassis 18 is located the bottom of end storehouse 16.
Referring to fig. 1 and 3, an embodiment of the present invention: the utility model provides an aluminum alloy microchannel heat exchanger preliminary welding processing apparatus, including guide ring 20, guide slot 21 has been seted up to the opposite face of a set of guide ring 20, guide plate 22 is installed to the inboard gomphosis of guide slot 21, arc board 23 is installed to one side of guide plate 22, connecting block 24 is installed to the front of guide plate 22, fixed plate 25 is installed to the front of arc board 23, fixing hole 26 has run through to the inside of fixed plate 25, locating hole 27 has run through to the inside of one of guide ring 20, bolt 28 is installed to the inside through screw thread of locating hole 27 and fixing hole 26, helping hand rod 29 is installed to the front of connecting block 24, guide ring 20 can provide the open space for guide slot 21 under the support of shell 1, guide slot 21 can provide the removal guide effect for guide plate 22, guide plate 22 can provide the support for arc board 23, make arc board 23 can stabilize support fixed plate 25, and guide ring 20 can provide the space for locating hole 27, the staff can rotate bolt 28 according to the needs of actual conditions, make bolt 28 draw out from locating hole 27 that the corresponding position under the external force, remove the fixed effect to fixed plate 25, promote helping hand rod 29, make the staff use the suitable rotation of bolt 28 to the guide plate 28, make the pole use of the fixing hole 28 to the fixing hole that the pilot hole 28, the staff can utilize the pilot hole to the pilot hole that the pilot hole 27 to use of the pilot hole 27 to make the pilot hole that the pilot hole 27 to stabilize under the pilot hole that the pilot hole 27, promote after making the pilot hole 27 to make the pilot hole 27.
Referring to fig. 1 and 5, an embodiment of the present invention: the utility model provides an aluminum alloy microchannel heat exchanger weld pretreatment device, including shell 1, shell 15 is installed to the bottom of shell 1, bottom storehouse 16 is installed to the bottom of shell 15, funnel 32 is installed to the top of bottom storehouse 16, the top of bottom storehouse 16 is run through and is installed stopper 33, pull ring 34 is installed to the top of stopper 33, and stopper 33 is located the inboard of funnel 32, threaded tube 35 is installed to one side and the front of bottom storehouse 16 run through, threaded cap 36 is installed to the outside screw thread of threaded tube 35, stirring frame 30 is installed to the both sides of transfer line 17, stirring plate 31 is installed to the inboard of stirring frame 30 and can provide firm support for shield 15, make shield 15 can support bottom storehouse 16 firmly, bottom storehouse 16 can provide the temporary storage and stir the space for the solution, the staff can extract stopper 33 through pull ring 34 according to actual conditions's needs, the effect of opening the top opening of bottom storehouse 16 is realized opening, the staff can pour into the inboard of bottom storehouse 16 into with the opening that opens from funnel 32 punishment of solution of corresponding proportion afterwards, the staff needs start motor 14, make motor 14 drive stirring frame 30 and rotation together with stirring plate 31 and the effect that the front that the stirring frame can make the outside of stirring frame 35 prepare from the threaded tube that the screw thread can be close to the inside of screw thread that the preparation is realized, the staff can make the outside of stirring frame 35 of getting close to the screw thread of the outside of preparing, the staff is close to the inside of screw thread storehouse 35 of the screw thread of taking out, the screw thread of the staff is realized, the screw hole 35 is close to the inside of the staff is realized.
Referring to fig. 1 and 4, an embodiment of the present invention is shown: the utility model provides an aluminum alloy microchannel heat exchanger processing apparatus before welding, including end storehouse 16, a set of piece 37 is installed to one side of end storehouse 16, branch 38 is installed to the bottom of one of them piece 37 and the back of another piece 37, stay 39 is installed to the bottom of branch 38, brush 40 is installed to the bottom of stay 39, end storehouse 16 can stabilize under the support of guard shield 15 and support a piece 37, a piece 37 can provide firm support for branch 38, branch 38 can stabilize through stay 39 and support brush 40, brush 40 has certain elasticity, can warp under the effect of external force, the staff can remove the device according to actual conditions's needs, make end storehouse 16 drive brush 40 and move together under the support of branch 38 and stay 39 through a piece 37 under the effect of external force, make brush 40 polish the piece that the production under the effect of external force and clean.
Referring to fig. 1, fig. 2 and fig. 6, an embodiment of the present invention: a pre-welding treatment device for an aluminum alloy microchannel heat exchanger comprises a support block 37, wherein an electric rod 41 is installed at the top of the support block 37, a connecting plate 42 is installed on one side of the electric rod 41, a connecting plate 43 is installed at the bottom of the connecting plate 42, an injection hopper 44 is installed at the bottom of the connecting plate 43, a fixing plate 45 is installed on the outer side of the injection hopper 44, a sponge 46 is installed at the bottom of the fixing plate 45, the support block 37 can stably support the electric rod 41 under the support of a bottom bin 16, the electric rod 41 can stretch out and draw back under the operation of a worker, the worker can open a threaded cover 36 close to one side according to actual requirements, so that a solution prepared on the inner side of the bottom bin 16 can flow out to the inner side of the injection hopper 44 from a threaded pipe 35 close to one side, meanwhile, the worker needs to control the electric rod 41 to shrink or stretch out according to actual requirements, the electric rod 41 drives the fixing plate 45 and the sponge 46 to move up and down together through the connecting plate 42 and the connecting plate 43, the sponge 46 can enable the sponge 46 to be adjusted to be at a proper height, the sponge 46 can absorb the solution on the inner side of the sponge 46, and the sponge 46 can be contacted with a workpiece when the workpiece to be wiped on the workpiece.
Further, the diffusion welding method of the pre-welding treatment device is as follows:
s1, mechanically polishing the surface before welding: mechanically polishing the to-be-welded surface of the 5050 aluminum alloy to a roughness Ra0.2;
s2, cleaning process before welding: cleaning oil stains on the surface with absolute ethyl alcohol, cleaning with 10 wt% sodium hydroxide solution at 50 ℃ for 60s, cleaning the surface with water, pickling with dilute hydrochloric acid solution for 20s, and performing ultrasonic cleaning for 5min after the water cleaning and the prevention of the oil stains in the alcohol solution;
s3, preparing a surface hydride solution: mixing 99.99% purity lithium aluminum hydride powder in tetrahydrofuran organic solution with concentration ratios of 1mol/L, 1.5mol/L and 2.4mol/L to prepare hydride solution, and uniformly coating oily organic solvent on the surface of the aluminum alloy to be welded;
s4, diffusion welding process: loading the part into a diffusion welding furnace, wherein a build-up welding layer mica is paved between an upper pressure head and a lower pressure head and laminated plates of the workpiece are overlapped, the surface to be welded is coated with hydride, and the workpiece is positioned under the pressure of 0.5MPa in advance; closing the furnace door, vacuumizing the furnace chamber, and starting heating when the vacuum degree is reduced to 5E-3 Pa; when the temperature of the workpiece reaches 400 ℃, keeping the temperature for 30min, then continuing to heat to 500, 520 and 530 ℃, keeping the temperature for 1, 1.5 and 2h, applying welding pressure of 2, 3 and 4MPa, and then removing the pressure and cooling to room temperature along with the furnace.
Further, in step S4, the method further includes the steps of:
s41, by adopting the method for welding, the surface pretreatment of the large-size part can be realized, the process is simple, and the extra equipment and manpower cost are not required to be added; low-temperature welding can be realized, and the heat damage of the parent metal is weakened; the decomposition equation of the welding interface due to the pyrolysis of AlLiH4 is as follows:
3LiAlH4→Li3AlH6+2Al+3H2↑
2Li3AlH6→6LiH+2Al+3H2↑
2LiH+2Al→2LiAl+H2↑
The working principle is as follows: whether the device has the problem of influencing use or not is checked before the device is used, when a worker needs to use the device, the worker needs to adjust the position of the power-assisted rod 29 to a proper position according to the needs of actual conditions, then the worker holds the power-assisted rod 29 and the handle 4 to move the device to a working place, then the worker needs to operate the pressing plate 9 to press the switch 6 to start the motor 14 to rotate the polishing disc 19 and polish the surface of a workpiece, meanwhile, the worker can inject the solution to be proportioned into the inner side of the bottom bin 16 to prepare the solution by stirring, then the worker needs to move the brush 40 to clean the scraps, then the solution is soaked in the sponge 46 and the sponge 46 is moved to coat the solution on the surface of the workpiece, and finally the workpiece is subjected to diffusion welding.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned to the position in question.
Claims (9)
1. The utility model provides an aluminum alloy microchannel heat exchanger processing apparatus before welding, includes shell (1), its characterized in that: a group of guide rings (20) are arranged on the outer side of the shell (1);
the opposite surfaces of the guide rings (20) are provided with guide grooves (21), guide plates (22) are embedded and installed on the inner sides of the guide grooves (21), an arc plate (23) is installed on one side of each guide plate (22), a connecting block (24) is installed on the front surface of each guide plate (22), a fixing plate (25) is installed on the front surface of each arc plate (23), fixing holes (26) are formed in the fixing plate (25) in a penetrating mode, positioning holes (27) are formed in one of the guide rings (20) in a penetrating mode, bolts (28) are installed on the positioning holes (27) and the fixing holes (26) in a penetrating mode through threads, and a power-assisting rod (29) is installed on the front surface of each connecting block (24);
guard shield (15) are installed to the bottom of shell (1), end storehouse (16) are installed to the bottom of guard shield (15), funnel (32) are installed at the top of end storehouse (16), the top of end storehouse (16) is run through and is installed stopper (33), pull ring (34) are installed at the top of stopper (33), and stopper (33) are located the inboard of funnel (32), one side and the front of end storehouse (16) are run through and are installed screwed pipe (35).
2. The aluminum alloy microchannel heat exchanger pre-welding treatment device as recited in claim 1, wherein: end shell (2) are installed at shell (1) top, block (3) are installed in running through at the top of end shell (2), handle (4) are installed at the back of shell (1), end (5) are installed at the back of handle (4), switch (6) are installed at the top of handle (4), front and back mounted of handle (4) have bull stick (7), extension board (8) are installed in the outside of bull stick (7), clamp plate (9) are installed at the top of extension board (8), gag lever post (10) are installed to the bottom of clamp plate (9), a set of fagging (11) are installed at the top of handle (4), bull stick (12) are installed in the inside of fagging (11) through, low board (13) are installed in the outside of bull stick (12), the top of low board (13) is located the front of gag lever post (10).
3. The aluminum alloy microchannel heat exchanger pre-welding treatment device as recited in claim 2, wherein: the bottom of shell (1) is installed the bottom and is installed guard shield (15), and motor (14) are installed to the inboard of shell (1), and drive rod (17) are installed in the output of motor (14) through bearing running through end storehouse (16), and chassis (18) are installed to the bottom of drive rod (17), and the mill dish (19) is installed to the bottom of chassis (18).
4. The aluminum alloy microchannel heat exchanger pre-weld treatment device according to claim 1, characterized in that: the outer side of the threaded pipe (35) is provided with a threaded cover (36) in a threaded manner, the two sides of the transmission rod (17) are provided with a stirring frame (30), and the inner side of the stirring frame (30) is provided with a stirring plate (31).
5. The aluminum alloy microchannel heat exchanger pre-weld treatment device as set forth in any one of claims 1 to 4, wherein: the top part of the handle (4) is a flat surface;
the switch (6) is positioned on the top of the straight surface of the top of the handle (4);
the chassis (18) is positioned at the bottom of the bottom bin (16).
6. The aluminum alloy microchannel heat exchanger pre-welding treatment device as recited in claim 4, wherein: a set of supporting blocks (37) are installed on one side of the bottom bin (16), supporting rods (38) are installed on the bottom of one supporting block (37) and the back of the other supporting block (37), supporting strips (39) are installed at the bottoms of the supporting rods (38), and brushes (40) are installed at the bottoms of the supporting strips (39).
7. The aluminum alloy microchannel heat exchanger pre-weld treatment device according to claim 6, characterized in that: electric rod (41) are installed at the top of brace piece (37), and link board (42) are installed to one side of electric rod (41), and fishplate bar (43) are installed to the bottom of link board (42), and filling fill (44) are installed to the bottom of fishplate bar (43), and solid board (45) are installed in the outside of filling fill (44), and sponge (46) are installed to the bottom of solid board (45).
8. The aluminum alloy microchannel heat exchanger pre-weld treatment device as recited in any one of claims 1 to 7, the pre-weld treatment device diffusion welding method is as follows:
s1, mechanically polishing the surface before welding: mechanically polishing the to-be-welded surface of the 5050 aluminum alloy to a roughness Ra0.2;
s2, cleaning process before welding: cleaning oil stains on the surface with absolute ethyl alcohol, cleaning with 10 wt% of sodium hydroxide solution at 50 ℃ for 60s, cleaning the surface with water, pickling with dilute hydrochloric acid solution for 20s, and performing ultrasonic cleaning for 5min after the water cleaning to prevent the oil stains from being mixed with the alcohol solution;
s3, preparing a surface hydride solution: mixing 99.99% purity lithium aluminum hydride powder in tetrahydrofuran organic solution with concentration ratio of 1mol/L, 1.5mol/L and 2.4mol/L to prepare hydride solution, and uniformly coating oily organic solvent on the surface of the aluminum alloy to be welded;
s4, diffusion welding process: loading the part into a diffusion welding furnace, wherein a build-up welding layer mica is paved between an upper pressure head and a lower pressure head and between work pieces, stacking the work piece laminates, coating hydride on the surface to be welded, and presetting the pressure to 0.5MPa to position the work pieces; closing the furnace door, vacuumizing the furnace chamber, and starting heating when the vacuum degree is reduced to 5E-3 Pa; when the temperature of the workpiece reaches 400 ℃, keeping the temperature for 30min, then continuing to heat to 500, 520 and 530 ℃, keeping the temperature for 1, 1.5 and 2h, applying welding pressure of 2, 3 and 4MPa, and then removing the pressure and cooling to room temperature along with the furnace.
9. The preparation process of the aluminum alloy microchannel heat exchanger before-welding treatment device as recited in claim 8, wherein the preparation process comprises the following steps: in step S4, the method further includes the steps of:
s41, by adopting the method for welding, the surface pretreatment of the large-size part can be realized, the process is simple, and the extra equipment and manpower cost are not required to be added; low-temperature welding can be realized, and the heat damage of the parent metal is weakened; the decomposition equation of the welding interface due to the pyrolysis of AlLiH4 is as follows:
3LiAlH4→Li3AlH6+2Al+3H2↑
2Li3AlH6→6LiH+2Al+3H2↑
2LiH+2Al→2LiAl+H2↑
reaction 2 generally starts with melting of lithium aluminum hydride, at a temperature in the range of 150 to 170 ℃, followed by immediate decomposition to Li3AlH6, but reaction 2 is carried out below the melting point of LiAlH4, with Li3AlH6 decomposing to LiH and Al at about 200 ℃, followed by decomposition to LiAl above 400 ℃.
The surface oxide is removed by utilizing the local reducing atmosphere of the interface, thereby reducing the welding temperature and realizing the low-temperature reliable connection.
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