CN112845661A - Expanded tube welding production method of simple evaporator - Google Patents
Expanded tube welding production method of simple evaporator Download PDFInfo
- Publication number
- CN112845661A CN112845661A CN202011622089.7A CN202011622089A CN112845661A CN 112845661 A CN112845661 A CN 112845661A CN 202011622089 A CN202011622089 A CN 202011622089A CN 112845661 A CN112845661 A CN 112845661A
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- welding
- tube
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- pipe
- expansion
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Links
- 238000003466 welding Methods 0.000 title claims abstract description 104
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 43
- 238000004080 punching Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims abstract description 9
- 238000010008 shearing Methods 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 28
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 208000027418 Wounds and injury Diseases 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 6
- 230000006378 damage Effects 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 6
- 208000014674 injury Diseases 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910001882 dioxygen Inorganic materials 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- RIRXDDRGHVUXNJ-UHFFFAOYSA-N [Cu].[P] Chemical compound [Cu].[P] RIRXDDRGHVUXNJ-UHFFFAOYSA-N 0.000 claims description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 239000002737 fuel gas Substances 0.000 claims 2
- 238000007789 sealing Methods 0.000 abstract description 7
- 229910000679 solder Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses an expanded tube welding production method of a simple evaporator, which comprises the steps of bending a U-shaped tube, punching, shearing and installing fins, installing each component of the evaporator, expanding the tube, welding and the like, the operation is simple and precise, the quality of a material part in each step is ensured through a simple and clear self-checking program, the yield is improved, and the production cost is reduced; the welding quality is ensured by controlling the temperature and selecting the welding rod in the welding process, and the sealing property of the product is ensured.
Description
Technical Field
The invention relates to the field of evaporator production and processing, in particular to a method for producing a simple evaporator by welding an expansion pipe.
Background
The finned evaporator is an important heat exchange device and is widely applied to various heat exchange systems. A finned evaporator mainly comprises fins and U-shaped tubes inserted in the fins, wherein high-pressure liquid can pass through the U-shaped tubes when the finned evaporator is used, so that the requirement on the sealing property is high in order to avoid the influence of liquid leakage on other devices of a heat exchange system. The existing simple evaporator often has the condition that the tightness of a material part can not meet the requirement in the expanded tube welding, and the yield is low.
Disclosure of Invention
Aiming at the problem that the simple evaporator in the prior art is insufficient in sealing performance, the expanded tube welding production method of the simple evaporator is provided, and the sealing performance of the product is better.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for welding and producing an expanded tube of a simple evaporator comprises the following steps:
s10, placing the copper pipe material on a full-automatic pipe cutting and bending machine, passing through a material passing channel, sending the material into a straightening system for straightening, installing the straightened copper pipe into a clamping feeder, and bending the straightened copper pipe into a U-shaped pipe;
s20, checking the bent U-shaped pipe, and confirming that the surface of the U-shaped pipe is free from clamping injury and collision injury and the bottom and the pipe orifice of the U-shaped pipe are not damaged;
s30, mounting the aluminum foil on a punching machine, enabling the aluminum foil to penetrate through the middle of an oil collecting tank and a punching die of the punching machine, and adjusting the punching machine according to preset parameters of fins;
s40, checking whether the punching fin state, the fin surface and the fin appearance, and the two side edge materials of the punch are abnormal, installing a material collecting frame, and enabling the core rod on the material collecting frame to be straight;
s50, performing fin punching operation, and checking whether the filled fin punching and shearing surface has abnormal conditions and meets the requirements or not;
s60, adjusting the positions of the tube expander connector, the expansion rod, the expansion head, the flaring sleeve, the stripper plate and the expansion height limit backer as well as the heights of the barrier strip and the pressure plate according to the product process parameters, so that the pressure plate and the barrier strip for fixing the material are parallel to each other;
s70, mounting the side plates and the fins of the tube expansion on the U-shaped tube according to the technological parameters of the product, mounting the assembled material on the tube expander, and performing tube expansion operation;
s80, checking whether the material piece after the tube expansion meets the processing requirements or not according to the product technological parameters;
and S90, adjusting the air source, connecting the air path with the welding gun, preparing welding rods and soldering flux, and installing the tube group and the liquid distributor of the evaporator at the correct positions according to the process drawing to perform welding operation.
The technical scheme adopted by the invention for solving the technical problem further comprises the following steps:
in the tube expansion welding production method of the simple evaporator, the predetermined parameters of the fins comprise at least three of the punching fin frequency, the fin type, the plate distance, the row number, the hole number, the pore diameter and the plate number.
According to the expanded tube welding production method of the simple evaporator, the product process parameters comprise at least three of the inner diameter of the flaring, the outer diameter of the flaring, the flaring detection degree and the width of the end lamination.
According to the expanded tube welding production method of the simple evaporator, the gas source comprises a nitrogen cylinder, a gas cylinder and an oxygen cylinder.
The expanded tube welding production method of the simple evaporator further comprises the following steps:
s91, connecting an air outlet of a nitrogen bottle with the U-shaped pipe of the material part, starting a nitrogen switch, introducing nitrogen for 5-15S, and exhausting air in the U-shaped pipe;
s92, ensuring that a welding nozzle of the welding gun is free from foreign matter blockage, opening a gas cylinder and an oxygen cylinder valve, igniting, and adjusting the gas outlet pressure according to gas welding pressure parameters until the flame becomes neutral flame with a flame center in light blue and an outer flame in light blue to orange yellow;
s93, adjusting the distance between the welding tip and the material piece and the inclination angle of the welding torch, heating the welding area of the material piece to 710-890 ℃, and continuously and uniformly feeding welding rods along the pipe orifice of the U-shaped pipe;
and S94, after welding, closing the welding gun, closing the valves of the gas cylinder and the oxygen cylinder, continuing to introduce nitrogen until the temperature of the welding area is reduced, closing the nitrogen cylinder, and cleaning welding slag on the surface of the welded part.
According to the expanded tube welding production method of the simple evaporator, the gas outlet pressure of the oxygen cylinder is 0.3-0.8MPa, and the gas outlet pressure of the gas cylinder is 0.03-0.10 MPa.
According to the tube expansion welding production method of the simple evaporator, the welding rod is a silver welding rod or a phosphor-copper welding rod.
According to the expanded tube welding production method of the simple evaporator, the welding gap at the joint of the U-shaped tube orifice and the tube group or the liquid distributor is 0.05-0.2mm during welding.
The invention has the beneficial effects that: the expansion pipe welding production method of the simple evaporator comprises the steps of bending of a U-shaped pipe, punching, shearing and installing of fins, installing of each component of the evaporator, expanding and welding and the like, the operation is simple and precise, the quality of a material part in each step is guaranteed through a simple and clear self-checking program, the yield is improved, and the production cost is reduced; the welding quality is ensured by controlling the temperature and selecting the welding rod in the welding process, and the sealing property of the product is ensured.
The invention will be further described with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a process flow chart of an embodiment of the method for producing the simple evaporator by welding the expanded tubes of the invention.
Detailed Description
The present embodiment is a preferred embodiment of the present invention, and other principles and basic structures that are the same as or similar to the present embodiment are within the scope of the present invention.
The process flow of the embodiment of the expanded tube welding production method of the simple evaporator is shown in figure 1, and specifically comprises the following steps:
s10, placing the copper pipe material on a full-automatic pipe cutting and bending machine, passing through a material passing channel, sending the material into a straightening system for straightening, installing the straightened copper pipe into a clamping feeder, and bending the straightened copper pipe into a U-shaped pipe;
s20, checking the bent U-shaped pipe, and confirming that the surface of the U-shaped pipe is free from clamping injury and collision injury and the bottom and the pipe orifice of the U-shaped pipe are not damaged;
s30, mounting the aluminum foil on a punching machine, enabling the aluminum foil to penetrate through the middle of an oil collecting tank and a punching die of the punching machine, and adjusting the punching machine according to preset parameters of fins;
s40, checking whether the fin punching state, the fin surface and appearance, and the two side edge materials of the punch are abnormal, installing a material collecting frame, and enabling a core rod on the material collecting frame to be straight so that the fins can normally fall on the material collecting frame;
s50, performing fin punching operation, and checking whether the filled fin punching and shearing surface has abnormal conditions, wherein the abnormal conditions comprise fin punching and shearing surface burrs, cracks, broken pieces, short pieces, oxidation yellowing, spot blackening and the like;
s60, adjusting the positions of the tube expander connector, the expansion rod, the expansion head, the flaring sleeve, the stripper plate and the expansion height limit backer as well as the heights of the barrier strip and the pressure plate according to the product process parameters, so that the pressure plate and the barrier strip for fixing the material are parallel to each other;
s70, mounting the side plates and the fins of the tube expansion on the U-shaped tube according to the technological parameters of the product, mounting the assembled material on the tube expander, and performing tube expansion operation;
s80, checking whether the material piece after the tube expansion meets the processing requirements or not according to the product technological parameters;
and S90, adjusting the air source, connecting the air path with the welding gun, preparing welding rods and soldering flux, and installing the tube group and the liquid distributor of the evaporator at the correct positions according to the process drawing to perform welding operation.
Wherein the welding operation in step S90 further comprises the steps of:
s91, connecting an air outlet of a nitrogen bottle with the U-shaped pipe of the material part, starting a nitrogen switch, introducing nitrogen for 5-15S, and exhausting air in the U-shaped pipe;
s92, ensuring that a welding nozzle of the welding gun is free from foreign matter blockage, opening a gas cylinder and an oxygen cylinder valve, igniting, and adjusting the gas outlet pressure according to gas welding pressure parameters until the flame becomes neutral flame with a flame center in light blue and an outer flame in light blue to orange yellow;
s93, adjusting the distance between the welding tip and the material piece and the inclination angle of the welding torch, heating the welding area of the material piece to 710-890 ℃, and continuously and uniformly feeding welding rods along the pipe orifice of the U-shaped pipe;
and S94, after welding, closing the welding gun, closing the valves of the gas cylinder and the oxygen cylinder, continuing to introduce nitrogen until the temperature of the welding area is reduced, closing the nitrogen cylinder, and cleaning welding slag on the surface of the welded part.
The predetermined parameters of the fins in the present embodiment include the sheet type, the number of rows, the number of pitch holes, and the aperture; the product process parameters include the inside diameter of the flare, the outside diameter of the flare, the flare penetration and the width of the end lamination. The gas source used in the welding in this embodiment includes a nitrogen gas cylinder, a gas cylinder, and an oxygen gas cylinder, where the gas is acetylene, the gas outlet pressure of the oxygen gas cylinder is 0.5MPa, and the gas outlet pressure of the gas cylinder is 0.25 MPa.
In this embodiment, when step S93 is performed, the soldering area of the material should be preheated to 550 degrees, and then the temperature range matching with the solder is selected according to the solder temperature between 710-. When the welding area reaches the welding temperature, the welding rod is fed into the welding gap, the welding gap is controlled to be 0.05-0.2mm, and the problem that the sealing performance of a finished product is affected due to the fact that the welding rod cannot be filled due to the fact that the gap is too large is avoided. When the welding rod is melted to enter the joint, the welding position is kept heated so as to facilitate the combination of the liquid solder and the U-shaped pipe, and the solder is uniformly fed along the welding gap without interruption when being filled. The tubes of the evaporator are welded one by one, and the evaporator with a large number of tubes can be welded at intervals in a jumping manner in order to prevent material parts such as fins, tube expansion side tubes and the like from warping and deforming due to excessive heating, and water is required to be brushed on the welding side fins to prevent the fins from discoloring.
The expansion pipe welding production method of the simple evaporator comprises the steps of bending of a U-shaped pipe, punching, shearing and installing of fins, installing of each component of the evaporator, expanding and welding and the like, the operation is simple and precise, the quality of a material part in each step is guaranteed through a simple and clear self-checking program, the yield is improved, and the production cost is reduced; the welding quality is ensured by controlling the temperature and selecting the welding rod in the welding process, and the sealing property of the product is ensured.
Claims (9)
1. The expanded tube welding production method of the simple evaporator is characterized by comprising the following steps of:
s10, placing the copper pipe material on a full-automatic pipe cutting and bending machine, passing through a material passing channel, sending the material into a straightening system for straightening, installing the straightened copper pipe into a clamping feeder, and bending the straightened copper pipe into a U-shaped pipe;
s20, checking the bent U-shaped pipe, and confirming that the surface of the U-shaped pipe is free from clamping injury and collision injury and the bottom and the pipe orifice of the U-shaped pipe are not damaged;
s30, mounting the aluminum foil on a punching machine, enabling the aluminum foil to penetrate through the middle of an oil collecting tank and a punching die of the punching machine, and adjusting the punching machine according to preset parameters of fins;
s40, checking whether the punching fin state, the fin surface and the fin appearance, and the two side edge materials of the punch are abnormal, installing a material collecting frame, and enabling the core rod on the material collecting frame to be straight;
s50, performing fin punching operation, and checking whether the filled fin punching and shearing surface has abnormal conditions and meets the requirements or not;
s60, adjusting the positions of the tube expander connector, the expansion rod, the expansion head, the flaring sleeve, the stripper plate and the expansion height limit backer as well as the heights of the barrier strip and the pressure plate according to the product process parameters, so that the pressure plate and the barrier strip for fixing the material are parallel to each other;
s70, mounting the side plates and the fins of the tube expansion on the U-shaped tube according to the technological parameters of the product, mounting the assembled material on the tube expander, and performing tube expansion operation;
s80, checking whether the material piece after the tube expansion meets the processing requirements or not according to the product technological parameters;
and S90, adjusting the air source, connecting the air path with the welding gun, preparing welding rods and soldering flux, and installing the tube group and the liquid distributor of the evaporator at the correct positions according to the process drawing to perform welding operation.
2. A tube expansion welding production method of a simple evaporator according to claim 1, wherein the predetermined fin parameters include at least three of a fin punching frequency, a sheet type, a pitch, a row number, a hole diameter and a sheet number.
3. The expanded tube welding production method of the simple evaporator according to claim 1, wherein the product process parameters include at least three of a flare inner diameter, a flare outer diameter, a flare penetration and an end lamination width.
4. A expand tube welding production method of a simple evaporator according to claim 1, wherein the gas source comprises a nitrogen gas cylinder, a gas cylinder and an oxygen gas cylinder.
5. The expanded pipe welding production method of the simple evaporator according to claim 4, wherein the welding operation further comprises the steps of:
s91, connecting an air outlet of a nitrogen bottle with the U-shaped pipe of the material part, starting a nitrogen switch, introducing nitrogen for 5-15S, and exhausting air in the U-shaped pipe;
s92, ensuring that a welding nozzle of the welding gun is free from foreign matter blockage, opening a gas cylinder and an oxygen cylinder valve, igniting, and adjusting the gas outlet pressure according to gas welding pressure parameters until the flame becomes neutral flame with a flame center in light blue and an outer flame in light blue to orange yellow;
s93, adjusting the distance between the welding tip and the material piece and the inclination angle of the welding torch, heating the welding area of the material piece to 710-890 ℃, and continuously and uniformly feeding welding rods along the pipe orifice of the U-shaped pipe;
and S94, after welding, closing the welding gun, closing the valves of the gas cylinder and the oxygen cylinder, continuing to introduce nitrogen until the temperature of the welding area is reduced, closing the nitrogen cylinder, and cleaning welding slag on the surface of the welded part.
6. A tube expansion welding production method of a simple evaporator according to claim 5, wherein in step S92, the fuel gas in the fuel gas bottle is acetylene.
7. The expanded pipe welding production method of the simple evaporator according to claim 6, wherein the gas outlet pressure of the oxygen cylinder is 0.3 to 0.8MPa, and the gas outlet pressure of the gas cylinder is 0.03 to 0.10 MPa.
8. A tube expansion welding production method of a simple evaporator according to claim 1, wherein the welding rod is a silver welding rod or a phosphor-copper welding rod.
9. A tube expansion welding production method of a simple evaporator as set forth in claim 1, wherein the welding clearance at the joint of the U-shaped tube orifice and the tube bank or the liquid distributor during welding is 0.05-0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011622089.7A CN112845661A (en) | 2020-12-30 | 2020-12-30 | Expanded tube welding production method of simple evaporator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011622089.7A CN112845661A (en) | 2020-12-30 | 2020-12-30 | Expanded tube welding production method of simple evaporator |
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| Publication Number | Publication Date |
|---|---|
| CN112845661A true CN112845661A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011622089.7A Pending CN112845661A (en) | 2020-12-30 | 2020-12-30 | Expanded tube welding production method of simple evaporator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114633086A (en) * | 2022-04-01 | 2022-06-17 | 李超 | Refrigeration plant accessory integrated assembly unit for cold chain |
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|---|---|---|---|---|
| GB860569A (en) * | 1958-02-28 | 1961-02-08 | Simobar Patents Ltd | Improvements in methods for the production of corrugated finned tubes |
| GB1448901A (en) * | 1973-05-10 | 1976-09-08 | Olin Corp | Method of fabricating metallic tubing and a welded hollow metal heat exchanger tube |
| CN101318245A (en) * | 2008-07-08 | 2008-12-10 | 四川成发航空科技股份有限公司 | Tube fin brazing process and internal tube heating soldering machine for |
| CN106216554A (en) * | 2016-08-15 | 2016-12-14 | 安徽天祥空调科技有限公司 | A kind of air-conditioning heat exchanger technique |
| CN108907606A (en) * | 2018-07-10 | 2018-11-30 | 郑州煤矿机械集团股份有限公司 | CLOOS welding robot welding gun restorative procedure |
| CN109773296A (en) * | 2017-11-11 | 2019-05-21 | 天津二建水电安装工程有限公司 | Copper pipe seamless welding technique |
-
2020
- 2020-12-30 CN CN202011622089.7A patent/CN112845661A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB860569A (en) * | 1958-02-28 | 1961-02-08 | Simobar Patents Ltd | Improvements in methods for the production of corrugated finned tubes |
| GB1448901A (en) * | 1973-05-10 | 1976-09-08 | Olin Corp | Method of fabricating metallic tubing and a welded hollow metal heat exchanger tube |
| CN101318245A (en) * | 2008-07-08 | 2008-12-10 | 四川成发航空科技股份有限公司 | Tube fin brazing process and internal tube heating soldering machine for |
| CN106216554A (en) * | 2016-08-15 | 2016-12-14 | 安徽天祥空调科技有限公司 | A kind of air-conditioning heat exchanger technique |
| CN109773296A (en) * | 2017-11-11 | 2019-05-21 | 天津二建水电安装工程有限公司 | Copper pipe seamless welding technique |
| CN108907606A (en) * | 2018-07-10 | 2018-11-30 | 郑州煤矿机械集团股份有限公司 | CLOOS welding robot welding gun restorative procedure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114633086A (en) * | 2022-04-01 | 2022-06-17 | 李超 | Refrigeration plant accessory integrated assembly unit for cold chain |
| CN114633086B (en) * | 2022-04-01 | 2023-10-17 | 东莞市科美斯科技实业有限公司 | Refrigeration plant accessory integral type assembly set for cold chain |
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Application publication date: 20210528 |
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