A vacuum brazing process method for aluminum alloy phase change thermal control components
A brazing process and phase change heat technology, which is used in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problem of inability to meet air tightness requirements and dimensional tolerance requirements, and cannot handle small-sized aluminum alloy phase change thermal control components Welding and other problems, to achieve the effect of improved positioning efficiency and good reliability
Active Publication Date: 2019-08-30
BEIJING HUAHANG RADIO MEASUREMENT & RES INST
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[0004] In view of the above analysis, the present invention provides a vacuum brazing process for aluminum alloy phase change thermal control components, which aims to solve the problem that the prior art cannot handle the welding of small-sized aluminum alloy phase change thermal control components and cannot meet the airtightness requirements and dimensional tolerance requirements
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[0057] For Jinxi functional welding of a certain type of aluminum alloy phase change thermal control component, the specific process is as follows:
[0058] The aluminum alloy phase change thermal control component is made of LF21 aluminum alloy. During the processing of the supporting plate 1, a process allowance of 1 mm is left in the length and height directions, and a process allowance of 0.5 mm is left in the width direction. After welding, it is finished. In order to position the supporting plate 1 and the round cover plate 2 and meet the brazing clearance requirements at the same time, the assembly clearance of the repaired two parts is within 0.03mm, and the assembly method is as follows figure 2 As shown, a cylindrical process tank is reserved above the round cover plate 2 to place the solder 3, the size Depth 1mm. Process the special cylindrical solder 3 to weld the circular seam, choose BAl86.5SiMg eutectic solder 3 with good fluidity, and the size of the solder ...
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Abstract
The invention relates to a vacuum brazing process for an aluminum alloy phase change thermal control member. In the vacuum brazing process, a process groove is formed in the outer side of the positionof a supporting plate and the phase change thermal control member where a round cover plate is welded, a brazing filler metal is placed in the process groove, and the supporting plate and the round cover plate are fixed by brazing. According to the vacuum brazing process for an aluminum alloy phase change thermal control member, the air tightness requirements and dimensional tolerance requirements of the phase change thermal control member are comprehensively considered, a vacuum brazing method is adopted; starting from the improvement of the caulking capability of the brazing filler metal, by the ingenious adoption of a novel brazing filler metal arrangement and positioning mode, a positive and negative two-time furnace welding method is adopted, so that the brazing rate is ensured, thesealing requirements are met, and the welding of the aluminum alloy phase change thermal control member is achieved.
Description
technical field [0001] The invention relates to the technical field of vacuum brazing, in particular to a vacuum brazing process method of an aluminum alloy phase change thermal control component. Background technique [0002] As more and more electronic devices use high-power chips with high packing density, and the volume is getting smaller and smaller, the requirements for heat sinks are getting higher and higher. A phased array radar system has high power and requires a heat sink thickness of only 5mm. The traditional pure aluminum alloy heat sink and liquid-cooled heat sink can no longer meet the temperature control requirements. For this reason, encapsulating phase-change materials into structural parts to form phase-change thermal control components can meet its requirements. On the basis of the hydraulic pressure requirements of traditional liquid-cooled heat sink welding, air-tightness requirements are proposed for the first time. [0003] At the same time, the pha...
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IPC IPC(8): B23P15/00B23K1/008B23K1/20B23K103/10
Inventor 王志鹏曹来东焦德龙杨文静许明珠肖爱群
Owner BEIJING HUAHANG RADIO MEASUREMENT & RES INST