CN111331217B - Method for controlling vacuum brazing and heat treatment deformation of high-precision and high-strength air-based cold plate - Google Patents
Method for controlling vacuum brazing and heat treatment deformation of high-precision and high-strength air-based cold plate Download PDFInfo
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- CN111331217B CN111331217B CN202010220204.1A CN202010220204A CN111331217B CN 111331217 B CN111331217 B CN 111331217B CN 202010220204 A CN202010220204 A CN 202010220204A CN 111331217 B CN111331217 B CN 111331217B
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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
- B23K1/008—Soldering within a furnace
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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Abstract
The invention discloses a method for controlling vacuum brazing and heat treatment deformation of a high-precision and high-strength wind-based cold plate, which utilizes the existing equipment to control vacuum brazing and heat treatment deformation of 6063 aluminum alloy to form a set of integrated process method. The invention carries out overall conception and combination aiming at the design of a vacuum brazing tool, the design of a vacuum brazing process and the design of a novel heat treatment process, can successfully and effectively control the deformation problem of the vacuum brazing and the heat treatment of the cold plate and improves the product quality.
Description
Technical Field
The invention relates to a vacuum brazing and heat treatment process method for a military 6063 aluminum alloy cold plate, in particular to a special heat treatment process method for a 6063 aluminum alloy cold plate, which can realize stable brazing quality of products, controllable brazing and heat treatment deformation and meet technical requirements of heat treatment indexes.
Background
The cold plate related to the invention is developed and produced for military radar. The cold plate is mainly responsible for heat transfer of partial electronic components in the radar system, and is located in an open field together with the system, so that the working environment is severe, and the requirement on the reliability of the cold plate is very high. The cold plate has the advantages of large volume (the size of a blank is 1240mmX970mmX63.35mm, the total weight is 154.69kg), complex structure, high brazing quality requirement (the quality of a brazed weld joint after brazing meets the requirement of a QJ2844-96 II-level weld joint, and meanwhile, the planeness after brazing is less than 0.5mm), and high heat treatment technical index (after heat treatment, a tensile test bar is processed on a product according to GB/T16865-2013 sample processing and tensile test method for a wrought aluminum-magnesium and aluminum alloy processing product tensile test, the tensile strength of the test bar is required to be greater than 206MPa, and the planeness after heat treatment is required to be less than 1.5 mm). The problems of large deformation of brazing and heat treatment and difficult correction of the large cold plate are always difficult in the industry. Particularly, the deformation of the product is uncontrollable in the traditional water-based quenching, and meanwhile, for the product with large area and large thickness, the water quenching can generate unpredictable damage to a welding seam structure, and even lead to the explosion of the welding seam in serious conditions. In view of the above difficulties, workers in the industry expect to be able to thoroughly solve the above problems, meet the weld quality and heat treatment strength indexes, effectively control the deformation of products, reduce the influence of quenching on the weld quality, and improve the product quality.
Disclosure of Invention
At present, the heat treatment mode aiming at the large cold plate in China mostly adopts solid solution in a solid solution furnace, water-based quenching and artificial aging, and the mode can cause uneven heating of the product due to the fact that a workpiece temperature control system is not arranged in the solid solution furnace in the heat treatment process, so that the heat treatment effect of the product can be negatively influenced; meanwhile, the heat stress of the product is concentrated and quickly released by pure water-based quenching, so that the deformation of the product is uncontrollable, and the brazing seam is cracked seriously to influence the brazing quality.
The invention aims to design a method for controlling high-precision and high-strength air-based cold plate vacuum brazing and heat treatment deformation, which ensures the brazing quality and improves the heat treatment strength of products by utilizing the existing equipment and is an integrated process method for controlling the brazing and heat treatment deformation of the products.
In order to achieve the above object, the present invention adopts the following technical solutions, starting from the design of the vacuum brazing assembly method, the design of the vacuum brazing process, the design of the heat treatment process, and the like.
A method for controlling the deformation of high-precision and high-strength wind-base cold plate by vacuum brazing and heat treatment includes sequentially vacuum brazing, solid dissolving, quenching and ageing the cold plate made of 6063 aluminum alloy,
when the cold plate is assembled by vacuum brazing, a graphite layer is laid on the lower end face of the cold plate, and the upper end face of the cold plate is pressed by a plurality of mutually independent springs;
when the cold plate is subjected to vacuum brazing, after the 570 ℃ heat preservation section is finished, the temperature difference between the inside and the outside of the cold plate is +/-2 ℃, the high-temperature section is set to be 615 ℃→ 608 ℃→ 603 ℃, the minimum temperature and the maximum temperature of the cold plate are strictly controlled in each high-temperature section, the cold plate can be uniformly heated to 593 +/-2 ℃ inside and outside, the surface temperature is always lower than 595 ℃, and after the cold plate is subjected to vacuum brazing, the cold plate can be discharged after the overall temperature of the cold plate is reduced to be below 200 ℃;
when the cold plate is subjected to solid solution, a vacuum brazing furnace is used as a solid solution furnace, and the temperature change of each part of the product is monitored in real time by using a thermocouple;
when the cold plate is quenched, a mode of simultaneously acting air quenching and water quenching is adopted;
and during cold plate aging, artificial secondary aging is adopted, and the cold plate is cooled to room temperature along with the furnace after heat preservation is finished.
Further, during the cold drawing vacuum brazing assembly, a lower cover plate is arranged below the cold drawing, graphite paper is laid between the lower cover plate and the lower end face of the cold drawing, a stainless steel base plate, a plurality of independent springs and an upper cover plate are sequentially arranged above the upper end face of the cold drawing, and a plurality of pull rods are arranged along the outline of the cold drawing and used for connecting the upper cover plate and the lower cover plate.
Further, when the cold plate is subjected to vacuum brazing, the following parameters are adopted:
heating for 30-40 min at 0-360 ℃; and (3) heat preservation time: 60-90 min, vacuum degree: > 2.0X 10-2(ii) a The lowest workpiece temperature is not lower than 240 ℃;
heating for 20min at 360-470 ℃; and (3) heat preservation time: 90-120 min, vacuum degree: greater than 7.5X 10-3(ii) a The lowest workpiece temperature is not lower than 410 ℃;
heating at 470-530 ℃ for 20 min; and (3) heat preservation time: 90-120 min, vacuum degree: > 6.7X 10-3(ii) a The lowest workpiece temperature is not lower than 470 ℃;
heating for 20min at 530-570 ℃; and (3) heat preservation time: 150-180 min; the lowest workpiece temperature reaches 555 +/-2 ℃;
heating at 570-615 ℃ for 30 min; and (3) heat preservation time: 25-35 min; the lowest workpiece temperature reaches 583 ℃;
reducing the temperature for 5min at 615-608 ℃; and (3) heat preservation time: 25-35 min; the lowest workpiece temperature reaches 590 ℃;
cooling for 5min at 608-603 ℃; and (3) heat preservation time: 25-35 min; the lowest workpiece temperature reaches 593 ℃, and then the power can be cut off and the temperature can be reduced.
Furthermore, the cold plate is naturally air-cooled after being vacuum brazed and discharged, and the cold plate can be disassembled when the temperature of the cold plate is reduced to the room temperature.
Preferably, the 4004 brazing filler metal is adopted in the cold plate vacuum brazing.
Preferably, the cold plate is solid-solutionized according to the following parameters:
heating for 80-90 min at 0-550 ℃; and (3) heat preservation time: 30-60 min; the lowest workpiece temperature is not lower than 500 ℃;
cooling for 5min at 550-540 ℃; and (3) heat preservation time: 30-60 min; the lowest workpiece temperature is not lower than 510 ℃;
reducing the temperature for 5min at 540-530 ℃; when the lowest thermocouple reaches 520 ℃, preserving the heat for 180min, immediately cutting off the power and discharging the furnace, and when the furnace is discharged, the lowest thermocouple must reach 525 ℃.
Preferably, when the cold drawing quenches, adopt fan and tuber pipe to cool down the cold drawing on the one hand, on the other hand adopts atomizer to spray aqueous medium at the cold drawing surface cooling, and two kinds of cooling modes act on the cold drawing simultaneously.
Preferably, the fan includes the first fan that sets up in the cold drawing below to and set up the second fan in the cold drawing side, the direction of blowing of tuber pipe points to the cold drawing up end, atomizer is located the homonymy of cold drawing and second fan.
Preferably, a bottom plate for supporting the cold plate is arranged between the cold plate and the first fan, and the bottom plate is of a hollow structure.
Preferably, during aging of the cold plate, secondary artificial aging is performed according to the following parameters:
heating for 30min at 0-150 ℃, and keeping the temperature for 180 min;
and (3) heating at 150-180 ℃ for 30min, keeping the temperature for 300min, and cooling to room temperature along with the furnace after the heat preservation is finished.
The invention relates to an integrated process method for controlling vacuum brazing and heat treatment deformation of a high-precision and high-strength wind-based cold plate, which is used for a cold plate which is researched and produced by a military radar in a matching way.
The integration of the invention is to control the vacuum brazing and heat treatment deformation of the product by controlling the whole process of the vacuum brazing and heat treatment on the premise of simultaneously meeting the requirements of other indexes.
In the invention, the cold plate vacuum brazing is carried out by adopting an independent spring pressing and graphite paper bottom-padding clamping mode, carrying out all-dimensional control on the temperature, the tapping temperature and the clamp-removing temperature in the vacuum brazing process and adopting a novel heat treatment mode to control the deformation of a product.
The heat treatment mode of the invention is to use a brazing furnace for solid solution at the same time, and adopt two medium quenching of wind and water and a mode of artificial secondary aging, thereby realizing the purposes of improving the product strength and controlling the product deformation.
The cold plate is processed by the method, the product is subjected to the heat treatment process, and a tensile test is carried out according to the requirement, so that the tensile strength of the test piece is greater than 206Mpa, the flatness of the product is less than 1.5mm, and the technical index requirement is met.
Drawings
FIG. 1 is a schematic view of a cold plate vacuum brazing assembly fixture according to the present invention;
FIG. 2 is a graph of a cold plate vacuum brazing process;
FIG. 3 is a graphical illustration of UT results after cold plate vacuum brazing;
FIG. 4 is a cold plate solution treatment process graph;
FIG. 5 is a schematic view of a cold plate quench treatment apparatus;
FIG. 6 is a graph of a cold plate aging process.
Detailed Description
The invention is further described with reference to the accompanying drawings, but the scope of protection claimed is not limited thereto.
In the embodiment, the technical concept of the invention is explained by specifically analyzing a plurality of aspects of vacuum brazing assembly, a vacuum brazing process, a solution treatment process, a quenching process, an artificial aging process and the like.
The design of the vacuum brazing assembly method and the tool comprises the following steps:
fig. 1 is a design drawing of a welding tool, the tool structure adopts the design of independent compression of springs at all parts, the tool comprises a lower cover plate 1, a piece of graphite paper 2, a stainless steel base plate 3, an upper cover plate 5 and 108 independent springs 4, and 12 upright rods 6 are used for connecting and fixing the upper cover plate and the lower cover plate through threads. The 12 poles are arranged in the sequence shown in the figure (namely in figure 1
) And the torque wrench is used for screwing for three times. The springs 4 at all parts are independently pressed so as to solve the problem that stress at all parts is uneven in the brazing process due to welding deformation of the tool for large-size products 7. Meanwhile, the springs 4 at all parts are independently pressed, so that heat transfer of the product 7 is facilitated. The design can well ensure that all parts can keep required pressure in the brazing process of the product 7, and can compensate the influence of the deformation problem of the tool after repeated use. Meanwhile, the graphite paper 2 is arranged between the product 7 and the lower cover plate 1, and the graphite paper 2 has good lubricity and thermal conductivity. In the process of brazing and heating, because the expansion coefficient between the stainless steel and the aluminum alloy is different, the traditional clamping mode can lead to the appearance of extruded injuries with different degrees on four sides after the welding of the product 7 is finished, the appearance of the product 7 is influenced, meanwhile, the flatness after welding can be seriously influenced, and the problem of solving can be well by adopting the graphite paper 2 for clamping.
The specific design of the vacuum brazing process is as follows:
in this embodiment, the specific requirements of vacuum brazing are as follows:
0-360 deg.C (temperature rising 30-40 min; holding time 60-90 min; vacuum degree > 2.0 × 10)-2(ii) a The lowest workpiece temperature is not lower than 240 ℃);
360-470 deg.C (20 min for heating, 90-120 min for heat preservation, and vacuum degree greater than 7.5 × 10-3(ii) a The lowest workpiece temperature is not lower than 410 ℃);
470-530 deg.C (20 min for heating, 90-120 min for holding time, and vacuum degree greater than 6.7 × 10-3(ii) a The lowest workpiece temperature is not lower than 470 ℃);
530-570 ℃ (heating for 20min, holding time for 150-180 min, minimum workpiece temperature of 555 +/-2 ℃);
570-615 deg.C (temperature rising for 30 min; holding time for 25-35 min; minimum workpiece temperature up to 583 deg.C);
615-608 ℃ (cooling for 5min, heat preservation time is 25-35 min, the lowest workpiece temperature reaches 590 ℃), 608-603 ℃ (cooling for 5min, heat preservation time is 25-35 min, and the lowest workpiece temperature reaches 593 ℃), and then power can be cut off and cooling can be carried out;
the cold plate has the characteristics of wide plate surface, thick thickness, wide welding surface, low heat transfer speed and the like in the brazing process. The defect of corrosion of 6063 aluminum alloy and internal fins can be caused by the over-high brazing temperature, and the defect of insufficient filling of the brazing filler metal, even large-area desoldering and the like can easily occur due to the poor fluidity of the brazing filler metal 4004 with the over-low temperature; therefore, the product placing position is strictly controlled when the vacuum brazing process enters the furnace, so that the distances between the product 7 and the heating belt in the front, back, left and right directions are basically equal, and the condition of overhigh local temperature can not occur. Before the high-temperature brazing time period, a multi-gradient and long-heat-preservation process method is adopted, the temperature difference between the inside and the outside of the product 7 is reduced as much as possible, and the temperature uniformity of the product 7 in each temperature period is ensured. The temperature difference between the inside and the outside of the product 7 is +/-2 ℃ after the 570 ℃ heat preservation is finished. The high-temperature sections are set to be 615-608-603 ℃, and the lowest temperature and the highest temperature of the product 7 need to be strictly controlled in each high-temperature section, so that the product 7 can be uniformly and internally heated to 593 +/-2 ℃, and the surface temperature is always lower than 595 ℃, thereby avoiding the phenomena of nonuniform solder flow, overburning and the like caused by the difference of the internal temperature and the external temperature of the product 7 and the high surface temperature. The temperature uniformity of the product 7 in the whole brazing process is ensured by strictly controlling the temperature difference of the product 7, so that the brazing deformation of the product 7 caused by local overheating is avoided. And simultaneously controlling the tapping temperature. After the welding is finished, when the overall temperature of the product 7 is reduced to below 200 ℃, the product can be discharged from the furnace. And naturally cooling the product after the product is taken out of the furnace, and when the temperature of the product 7 is reduced to room temperature, detaching the clamp.
By applying the clamping mode and the vacuum brazing process, the welding quality meeting the technical requirements can be obtained, and the flatness of a product 7 after the clamp is disassembled is less than 0.3 mm.
Fig. 3 is a UT diagram of a cold plate product 7 produced using the above process.
Regarding the design of the heat treatment process:
solid solution:
the traditional solid solution furnace is suitable for products with small volume due to the lack of a workpiece temperature monitoring system. Because the product 7 has large volume and the temperature difference between the inside and the outside of the product 7 is large in the temperature rising process, the traditional solid solution mode can not meet the requirement of the product 7. The invention adopts the vacuum brazing furnace as the solid solution furnace, and uses the thermocouple to monitor the temperature change of each part of the product 7 in real time, thereby ensuring that the internal and external temperatures of the product 7 can reach the preset value. The solid solution parameters were as follows:
0-550 ℃ (heating for 80-90 min, holding time for 30-60 min, and lowest workpiece temperature not lower than 500 ℃);
550-540 deg.C (cooling for 5 min; holding time for 30-60 min; minimum workpiece temperature not lower than 510 deg.C);
540-530 ℃ (cooling for 5min, keeping the temperature for 180min after the lowest thermocouple reaches 520 ℃, immediately cutting off the power and discharging, wherein the lowest thermocouple must reach 525 ℃) when discharging;
a quenching mode:
the traditional quenching is generally water quenching. Aiming at the product 7, the simple water quenching can concentrate and quickly release the structure stress and the thermal stress, so that the product 7 is deformed unpredictably, and even when the stress exceeds the ultimate strength of the material, the brazing seam is cracked, so that the product 7 is scrapped. Aiming at the product 7, the invention designs a novel quenching mode.
Fig. 3 is a schematic drawing of quenching. The spraying device comprises a fan (a first fan 4 and a second fan 1), a spraying device 2, a bottom plate 3, air pipes (a first air pipe 5 and a second air pipe 7) and a workpiece product 7. The quenching mode takes wind and water as quenching media. The wind medium adopts the mode of tuber pipe and fan to transmit to the work piece on, and the aqueous medium adopts atomizer 2's mode to spray to the work piece, realizes rapid cooling. The mode can achieve the effect of the traditional water quenching, and meanwhile, the temperature of the workpiece is uniformly reduced, and stress concentration cannot be caused. The bottom plate 3 adopts a hollow mode, so that heat can be quickly exchanged between a workpiece and the environment during solid solution and quenching, and obvious effects on temperature rise and temperature reduction are achieved.
③ aging mode:
the invention adopts an artificial secondary aging mode to perform aging on the product. The tensile strength index of the product after aging completely meets the technical requirements. The aging parameters are as follows:
0 to 150 ℃ (temperature rise time 30min, heat preservation time 180min)
150 to 180 ℃ (temperature rise time 30min, heat preservation time 300min)
And cooling to room temperature along with the furnace after the heat preservation is finished.
The product is subjected to the heat treatment process, and a tensile test is carried out according to the requirement, so that the tensile strength of a test piece is greater than 206Mpa, the flatness of the product is less than 1.5mm, and the technical index requirement is met.
From the above results, it was found that a 6063 aluminum alloy brazing sheet having a small deformation, stable brazing quality, and satisfactory heat treatment strength could be obtained by the present integrated process of vacuum brazing and heat treatment.
Claims (7)
1. The method for controlling the vacuum brazing and the heat treatment deformation of the high-precision and high-strength air-based cold plate is characterized by comprising the following steps of: comprises the steps of sequentially carrying out vacuum brazing, solid solution, quenching and aging on a cold plate made of 6063 aluminum alloy, wherein,
when the cold plate is assembled by vacuum brazing, a graphite layer is laid on the lower end face of the cold plate, and the upper end face of the cold plate is pressed by a plurality of mutually independent springs;
when the cold plate is subjected to vacuum brazing, the following parameters are adopted:
heating for 30-40 min at 0-360 ℃; and (3) heat preservation time: 60-90 min, vacuum degree: > 2.0X 10-2(ii) a The lowest workpiece temperature is not lower than 240 ℃;
heating for 20min at 360-470 ℃; and (3) heat preservation time: 90-120 min, vacuum degree: greater than 7.5X 10-3(ii) a The lowest workpiece temperature is not lower than 410 ℃;
heating at 470-530 ℃ for 20 min; and (3) heat preservation time: 90-120 min, vacuum degree: > 6.7X 10-3(ii) a The lowest workpiece temperature is not lower than 470 ℃;
heating for 20min at 530-570 ℃; and (3) heat preservation time: 150-180 min; the lowest workpiece temperature reaches 555 +/-2 ℃;
heating at 570-615 ℃ for 30 min; and (3) heat preservation time: 25-35 min; the lowest workpiece temperature reaches 583 ℃;
reducing the temperature for 5min at 615-608 ℃; and (3) heat preservation time: 25-35 min; the lowest workpiece temperature reaches 590 ℃;
cooling for 5min at 608-603 ℃; and (3) heat preservation time: 25-35 min; the lowest workpiece temperature reaches 593 ℃, and then the power can be cut off and the temperature can be reduced;
after the 570 ℃ heat preservation section is finished, the temperature difference between the inside and the outside of the cold plate is +/-2 ℃, the high temperature section is set to be three heat preservation sections of 615 → 608 → 603 ℃, the lowest temperature and the highest temperature of the cold plate need to be strictly controlled in each high temperature section, the cold plate can be uniformly heated to 593 +/-2 ℃ inside and outside, the surface temperature is always lower than 595 ℃, and the cold plate can be taken out of the furnace after the vacuum brazing of the cold plate is finished and the integral temperature of the cold plate is reduced to be lower than 200 ℃;
when the cold plate is subjected to solid solution, a vacuum brazing furnace is used as a solid solution furnace, a thermocouple is used for monitoring the temperature change of each part of the product in real time, and the method is executed according to the following parameters:
heating for 80-90 min at 0-550 ℃; and (3) heat preservation time: 30-60 min; the lowest workpiece temperature is not lower than 500 ℃;
cooling for 5min at 550-540 ℃; and (3) heat preservation time: 30-60 min; the lowest workpiece temperature is not lower than 510 ℃;
reducing the temperature for 5min at 540-530 ℃; when the lowest temperature of the thermocouple reaches 520 ℃, preserving the heat for 180min, immediately cutting off the power and discharging the furnace, and when the furnace is discharged, the lowest temperature of the thermocouple must reach 525 ℃;
when the cold plate is quenched, a mode of simultaneously acting air quenching and water quenching is adopted;
during cold plate aging, artificial secondary aging is adopted, and secondary artificial aging is executed according to the following parameters:
heating for 30min at 0-150 ℃, and keeping the temperature for 180 min;
and (3) heating at 150-180 ℃ for 30min, keeping the temperature for 300min, and cooling to room temperature along with the furnace after the heat preservation is finished.
2. The method of controlling high precision, high strength air-based cold plate vacuum brazing and heat treatment distortion of claim 1, wherein: during the cold drawing vacuum brazing assembly, set up the lower cover plate below the cold drawing, lay graphite paper between lower cover plate and the cold drawing lower extreme face, set gradually stainless steel backing plate, many independent springs and upper cover plate above the cold drawing up end, set up many pull rods simultaneously along the cold drawing outline for connect upper cover plate and lower apron.
3. The method of controlling high precision, high strength air-based cold plate vacuum brazing and heat treatment distortion of claim 1, wherein: and naturally cooling the cold plate after the cold plate is subjected to vacuum brazing and discharged out of the furnace, and the cold plate can be detached and clamped when the temperature of the cold plate is reduced to the room temperature.
4. The method of controlling high precision, high strength air-based cold plate vacuum brazing and heat treatment distortion of claim 1, wherein: and 4004 brazing filler metal is adopted during the vacuum brazing of the cold plate.
5. The method of controlling high precision, high strength air-based cold plate vacuum brazing and heat treatment distortion of claim 1, wherein: when the cold drawing quenches, adopt fan and tuber pipe to cool down the cold drawing on the one hand, on the other hand adopts atomizer to spray aqueous medium at the cooling drawing surface cooling, and two kinds of cooling methods act on the cold drawing simultaneously.
6. The method of controlling high precision, high strength air-based cold plate vacuum brazing and heat treatment distortion of claim 5, wherein: the fan is including setting up the first fan in cold drawing below to and set up the second fan in the cold drawing side, the blowing direction of tuber pipe points to the cold drawing up end, atomizer is located the homonymy of cold drawing and second fan.
7. The method of controlling high precision, high strength air-based cold plate vacuum brazing and heat treatment distortion of claim 6, wherein: a bottom plate for supporting the cold plate is arranged between the cold plate and the first fan, and the bottom plate is of a hollow structure.
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| CN113732429B (en) * | 2021-09-28 | 2023-03-17 | 贵州永红换热冷却技术有限公司 | Ultra-large cold plate vacuum brazing method and tool for vacuum brazing |
| CN113927119A (en) * | 2021-11-05 | 2022-01-14 | 贵州贵航汽车零部件股份有限公司 | Method and clamp for improving welding rate of cold plate radiator |
| CN114147307B (en) * | 2021-11-14 | 2023-01-17 | 中国电子科技集团公司第二十研究所 | Vacuum brazing process for ATR cabinet |
| CN118342061A (en) * | 2022-08-18 | 2024-07-16 | 飒羽辰工程科技(上海)有限公司 | Controllable phase change fastening method for accessories in wind power tower |
| CN115338608B (en) * | 2022-09-21 | 2024-02-27 | 中国电子科技集团公司第十四研究所 | Forming method of cold plate |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634745A (en) * | 2012-04-17 | 2012-08-15 | 烟台路通精密铝业有限公司 | Heat processing technology of aluminum alloy castings |
| CN104002005A (en) * | 2014-06-16 | 2014-08-27 | 贵州永红航空机械有限责任公司 | Vacuum brazing and heat treatment integrated process of aluminium alloy gas circuit board |
| CN104673980A (en) * | 2015-03-18 | 2015-06-03 | 苏州明志科技有限公司 | Quenching device for thermal aluminum alloy treatment |
| CN206122853U (en) * | 2016-09-26 | 2017-04-26 | 广东莫莱卡焊接科技有限公司 | Power battery electric connector welding jig |
| CN107598318A (en) * | 2017-09-18 | 2018-01-19 | 贵州永红换热冷却技术有限公司 | A kind of process and fixture for reducing by 6061 Aluminum Alloy Vacuum Brazing defects |
| CN109396587A (en) * | 2018-12-17 | 2019-03-01 | 扬州嘉和新能源科技有限公司 | A kind of method for welding of water-cooled plate |
| CN109536683A (en) * | 2018-12-29 | 2019-03-29 | 广西平果百矿高新铝业有限公司 | A kind of overlength aluminium extrusion material annealing device and heat treatment process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8841540B2 (en) * | 2011-08-03 | 2014-09-23 | Marlow Industries, Inc. | High temperature thermoelectrics |
-
2020
- 2020-03-25 CN CN202010220204.1A patent/CN111331217B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634745A (en) * | 2012-04-17 | 2012-08-15 | 烟台路通精密铝业有限公司 | Heat processing technology of aluminum alloy castings |
| CN104002005A (en) * | 2014-06-16 | 2014-08-27 | 贵州永红航空机械有限责任公司 | Vacuum brazing and heat treatment integrated process of aluminium alloy gas circuit board |
| CN104673980A (en) * | 2015-03-18 | 2015-06-03 | 苏州明志科技有限公司 | Quenching device for thermal aluminum alloy treatment |
| CN206122853U (en) * | 2016-09-26 | 2017-04-26 | 广东莫莱卡焊接科技有限公司 | Power battery electric connector welding jig |
| CN107598318A (en) * | 2017-09-18 | 2018-01-19 | 贵州永红换热冷却技术有限公司 | A kind of process and fixture for reducing by 6061 Aluminum Alloy Vacuum Brazing defects |
| CN109396587A (en) * | 2018-12-17 | 2019-03-01 | 扬州嘉和新能源科技有限公司 | A kind of method for welding of water-cooled plate |
| CN109536683A (en) * | 2018-12-29 | 2019-03-29 | 广西平果百矿高新铝业有限公司 | A kind of overlength aluminium extrusion material annealing device and heat treatment process |
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