CN111375860B - Method for brazing radiating tube and middle partition plate of tube type radiator - Google Patents
Method for brazing radiating tube and middle partition plate of tube type radiator Download PDFInfo
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- CN111375860B CN111375860B CN202010381714.7A CN202010381714A CN111375860B CN 111375860 B CN111375860 B CN 111375860B CN 202010381714 A CN202010381714 A CN 202010381714A CN 111375860 B CN111375860 B CN 111375860B
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- brazing
- filler metal
- middle partition
- partition plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
Abstract
The invention discloses a method for brazing a radiating pipe and a middle clapboard of a tubular radiator, which comprises the following steps: step 1: laying a plurality of layers of BNi82CrSiB amorphous brazing filler metal with the thickness of 0.03mm on the surface of the stainless steel plate, and micro-melting the brazing filler metal in a vacuum brazing furnace by adopting brazing parameters of 980 ℃ and 5min of heat preservation; step 2: punching the composite board formed by micro-melting brazing to form a middle partition board, and ensuring that the aperture of the middle partition board is larger than the outer diameter of the heat dissipation pipe, namely the brazing gap is in the range of 0.04mm-0.08 mm; and step 3: fitting the radiating pipe into the hole of the middle partition plate; and 4, step 4: the assembly was placed in a vacuum brazing furnace and re-brazed at 1070 c for 10 min. The invention solves the problem that the paste brazing filler metal is difficult to coat after a plurality of radiating pipes and partition plates are assembled.
Description
Technical Field
The invention relates to the technical field of stainless steel brazing, in particular to a remelting brazing method for a partition plate and a radiating pipe in a tube array radiator.
Background
The stainless steel tube type radiator is internally provided with a fuel oil cavity, the outside of the stainless steel tube type radiator is provided with an oil lubricating cavity, and the oil lubricating cavity is divided into oil lubricating channels by a plurality of middle partition plates to radiate the radiating tube. Generally, the middle partition plate and the radiating pipe are only in an assembly state, and the lubricant can flow through the assembly gap between the middle partition plate and the radiating pipe, so that the radiating efficiency of the radiating pipe is reduced. In order to improve the lubricating oil-burning heat dissipation efficiency of the tube nest radiator, if the paste-shaped brazing filler metal is coated on the middle partition plate for brazing, the brazing filler metal can be stacked and cover the surfaces of the radiating tubes at the non-brazed parts to influence the quality of products because the radiating tubes are arranged too tightly and the coating operation difficulty is high.
Disclosure of Invention
In order to solve the above problems, the present invention provides a remelting brazing method for a partition plate and a heat dissipation pipe in a tubular radiator, so as to solve the problem that the partition plate and the heat dissipation pipe are difficult to assemble when brazing.
The invention is realized by the following technical scheme:
a method for brazing a radiating pipe and a middle clapboard of a tube type radiator comprises the following steps,
step 1: degreasing and pickling the surface of the stainless steel plate, degreasing the surface of the brazing filler metal foil strip, assembling the stainless steel plate and the brazing filler metal foil strip after the stainless steel plate is dried, and then carrying out micro-melting brazing on the stainless steel plate and the brazing filler metal foil strip;
step 2: processing the composite board formed by the micro-melting brazing in the step 1 by using a punching machine to form a middle partition board, and removing oil stains and impurities on the surface of the middle partition board by using ultrasonic cleaning equipment;
and step 3: assembling the radiating pipe into the hole of the middle partition plate in the step 2, and fixing the relative position of the middle partition plate and the radiating pipe by using a tool;
and 4, step 4: and (3) placing the assembly in the step (3) in a vacuum brazing furnace, monitoring the temperature of the assembly by using a thermocouple, and then carrying out remelting brazing.
Preferably, the brazing filler metal foil strip is BNi82CrSiB amorphous brazing filler metal, and the thickness of the brazing filler metal foil strip is 0.03 mm.
Preferably, the brazing filler metal foil strip is single-layer or multi-layer.
Preferably, in the step 1, the temperature rise uniform speed before micro-melting brazing is 10 ℃/min, the micro-melting brazing temperature is 980 ℃, and the heat preservation time is 5 min.
Preferably, in the step 2, the composite plate formed by the micro-fusion brazing has a machining hole diameter larger than the outer diameter of the heat dissipation tube.
Furthermore, the difference between the processing aperture of the composite plate and the outer diameter of the heat dissipation pipe forms a brazing gap, and the brazing gap is controlled within the range of 0.04mm-0.08 mm.
Further, in the step 2, hole machining is performed from one side of the brazing filler metal of the composite plate, and the brazing filler metal at the edge of the hole is well covered by milling with a hard alloy milling cutter, so that subsequent brazing is facilitated.
Preferably, in the step 4, during the remelting brazing, the temperature rise uniform speed before the remelting brazing is 10 ℃/min, the remelting brazing temperature is 1070 ℃, and the heat preservation time is 10 min.
Compared with the prior art, the brazing filler metal and the middle partition plate form the composite plate by micro-fusion welding of the middle partition plate and the BNi82CrSiB amorphous brazing filler metal, and the composite plate is mechanically processed and then subjected to secondary remelting brazing. By the brazing method, the problems of brazing accumulation, non-brazing and difficult assembly are effectively avoided, the brazing quality of the product is ensured, and the heat dissipation efficiency of the product is improved.
Drawings
FIG. 1 is an assembly view of a brazing filler metal and stainless steel center spacer for micro-brazing;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a view of a spacer machining;
FIG. 4 is an assembly view of the heat pipe and the middle partition plate;
FIG. 5 is a front sectional view of FIG. 4;
in the figure: 1-BNi82CrSiB amorphous brazing filler metal, 2-middle partition plates, 3-brazing parts and 4-radiating pipes.
Detailed Description
The invention will be further described with reference to the following drawings and specific examples:
a remelting and brazing method for a clapboard and a radiating pipe in a tubular radiator comprises the following steps:
step 1: degreasing and pickling the surface of a stainless steel plate, degreasing the surface of a BNi82CrSiB amorphous brazing filler metal 1 (foil strip) with the thickness of 0.03mm, drying the stainless steel plate, assembling the stainless steel plate with a brazing filler metal foil strip according to a graph 1 and a graph 2 (namely paving the brazing filler metal foil strip on the surface of the stainless steel plate), and then carrying out micro-fusion brazing on the brazing filler metal, wherein the temperature rise and average speed is 10 ℃/min before the micro-fusion brazing, the micro-fusion brazing temperature is 980 ℃, and the heat preservation time is 5 min;
step 2: according to the figure 3, the composite board formed by micro-melting brazing is processed by a punching machine to form the middle partition board 2, the hole tolerance is to ensure that the brazing gap is within the range of 0.04mm-0.08mm (namely the difference value between the processing aperture of the composite board and the outer diameter of the radiating pipe), a hard alloy milling cutter is adopted to mill the brazing filler metal side during hole processing, and after the processing, surface oil stains and impurities are removed by ultrasonic cleaning equipment;
and step 3: assembling the radiating pipe 4 into the hole of the middle partition plate 2 according to fig. 4 and 5, and fixing the relative positions of the middle partition plate 2 and the radiating pipe 4 by using a tool, wherein the brazing part 3 is shown as a standard in fig. 5;
and 4, step 4: and (3) placing the assembly part in a vacuum brazing furnace, monitoring the temperature of the assembly part by using a thermocouple, carrying out remelting and brazing, wherein the temperature rise uniform speed is 10 ℃/min before remelting and brazing, the remelting and brazing temperature is 1070 ℃, and the heat preservation time is 10 min.
Claims (5)
1. A method for brazing a radiating pipe and a middle clapboard of a tube type radiator is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
step 1: the method comprises the following steps of (1) removing oil and acid on the surface of a stainless steel plate, removing oil on the surface of a brazing filler metal foil strip, assembling the stainless steel plate and the brazing filler metal foil strip after the stainless steel plate is dried, and then carrying out micro-fusion brazing on the stainless steel plate and the brazing filler metal foil strip, wherein the brazing filler metal foil strip is BNi82CrSiB amorphous brazing filler metal and is 0.03mm in thickness, the temperature rise and average speed before the micro-fusion brazing is 10 ℃/min, the micro-fusion brazing temperature is 980 ℃, and the heat preservation time is 5 min;
step 2: processing the composite board formed by the micro-melting brazing in the step 1 by using a punching machine to form a middle partition board, and removing oil stains and impurities on the surface of the middle partition board by using ultrasonic cleaning equipment;
and step 3: assembling the radiating pipe into the hole of the middle partition plate in the step 2, and fixing the relative position of the middle partition plate and the radiating pipe by using a tool;
and 4, step 4: and (3) placing the assembly in the step (3) in a vacuum brazing furnace, monitoring the temperature of the assembly by using a thermocouple, and then carrying out remelting and brazing, wherein during remelting and brazing, the temperature rise uniform speed is 10 ℃/min before remelting and brazing, the remelting and brazing temperature is 1070 ℃, and the heat preservation time is 10 min.
2. The method of claim 1, wherein the step of brazing the tube of the tubulation radiator to the middle partition plate comprises: the brazing filler metal foil strip is single-layer or multi-layer.
3. The method of claim 1, wherein the step of brazing the tube of the tubulation radiator to the middle partition plate comprises: in the step 2, the processing aperture of the composite plate formed by micro-melting brazing is larger than the outer diameter of the heat dissipation pipe.
4. The method of claim 3, wherein the step of brazing the tube of the tubulation radiator to the middle partition plate comprises: the difference between the processing aperture of the composite plate and the outer diameter of the heat dissipation pipe forms a brazing gap, and the brazing gap is controlled within the range of 0.04mm-0.08 mm.
5. The method of claim 1, wherein the step of brazing the tube of the tubulation radiator to the middle partition plate comprises: in the step 2, hole machining is performed from one side of the brazing filler metal of the composite plate, and the brazing filler metal is milled by a hard alloy milling cutter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010381714.7A CN111375860B (en) | 2020-05-08 | 2020-05-08 | Method for brazing radiating tube and middle partition plate of tube type radiator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010381714.7A CN111375860B (en) | 2020-05-08 | 2020-05-08 | Method for brazing radiating tube and middle partition plate of tube type radiator |
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| CN111375860A CN111375860A (en) | 2020-07-07 |
| CN111375860B true CN111375860B (en) | 2021-10-01 |
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Families Citing this family (4)
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| CN112620851B (en) * | 2020-12-24 | 2022-12-13 | 湘潭大学 | Method for connecting graphite and stainless steel through composite gradient interlayer high-temperature brazing |
| CN113290297B (en) * | 2021-05-27 | 2023-04-07 | 贵州永红航空机械有限责任公司 | Brazing filler metal assembling method for brazing high-temperature alloy honeycomb silencer |
| CN113478041A (en) * | 2021-07-15 | 2021-10-08 | 贵州航天电子科技有限公司 | Vacuum brazing processing method of waveguide antenna |
| CN114850710B (en) * | 2022-05-25 | 2023-05-05 | 贵州永红航空机械有限责任公司 | Brazing method of large-sized tube-in-tube radiator core assembly |
Citations (6)
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| GB820153A (en) * | 1956-06-12 | 1959-09-16 | Lawrence Holdings Overseas Ltd | Improvements in the manufacture of heat exchangers |
| US3985283A (en) * | 1974-08-01 | 1976-10-12 | United Aircraft Products, Inc. | Method of joining braze alloy to a parent metal part |
| CN102554509A (en) * | 2012-02-24 | 2012-07-11 | 山东大学 | Vacuum brazing solder and process of Mo-Cu alloy and stainless steel |
| CN106271488A (en) * | 2016-08-31 | 2017-01-04 | 贵州永红航空机械有限责任公司 | A kind of processing method of titanium alloy shell and tube combustion oil cooler |
| CN106363266A (en) * | 2016-11-22 | 2017-02-01 | 中国航空工业集团公司北京航空材料研究院 | Method for braze-welding core body of tube type radiator by adopting strip-shaped brazing filler metal |
| CN109570756A (en) * | 2018-12-26 | 2019-04-05 | 江苏省宜兴电子器件总厂有限公司 | A kind of thin type solder sheet and metalwork pre-fix method |
-
2020
- 2020-05-08 CN CN202010381714.7A patent/CN111375860B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB820153A (en) * | 1956-06-12 | 1959-09-16 | Lawrence Holdings Overseas Ltd | Improvements in the manufacture of heat exchangers |
| US3985283A (en) * | 1974-08-01 | 1976-10-12 | United Aircraft Products, Inc. | Method of joining braze alloy to a parent metal part |
| CN102554509A (en) * | 2012-02-24 | 2012-07-11 | 山东大学 | Vacuum brazing solder and process of Mo-Cu alloy and stainless steel |
| CN106271488A (en) * | 2016-08-31 | 2017-01-04 | 贵州永红航空机械有限责任公司 | A kind of processing method of titanium alloy shell and tube combustion oil cooler |
| CN106363266A (en) * | 2016-11-22 | 2017-02-01 | 中国航空工业集团公司北京航空材料研究院 | Method for braze-welding core body of tube type radiator by adopting strip-shaped brazing filler metal |
| CN109570756A (en) * | 2018-12-26 | 2019-04-05 | 江苏省宜兴电子器件总厂有限公司 | A kind of thin type solder sheet and metalwork pre-fix method |
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| CN111375860A (en) | 2020-07-07 |
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