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Air cold plate sealing forming technology of aluminum alloy

A molding process, aluminum alloy technology, applied in metal processing equipment, manufacturing tools, edge parts of workpieces, etc., can solve the problems of low production efficiency, low joint strength, poor compactness of brazing seams, etc., to improve the ability to withstand deep processing, Improve the welding yield and ensure the effect of sealing requirements

Inactive Publication Date: 2009-05-27
CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, vacuum brazing and gas shielded brazing methods are mostly used at home and abroad to realize the connection of cold plates [see: Song Jun, Research on Processing Technology of Phased Array Radar Cold Plate. Application of brazing technology in electronic products. Electromechanical Engineering 2003Vol19.No.3], brazing technology can be produced in batches, and the production efficiency is high, but brazing has low joint strength and strict requirements on parts processing, assembly and cleaning shortcoming
At the same time, the density of the brazing seam is poor. For the cold plate that requires surface processing after one welding, leakage after welding seam processing is prone to occur, and the product scrap rate is high.
Although the vacuum brazing process has improved the weld density of the cold plate, the current vacuum brazing cold plate structure can only use LF21 anti-rust aluminum material, the joint strength is low (only 100Mpa), and the vacuum brazing process is complicated to produce Inefficiencies still exist

Method used

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  • Air cold plate sealing forming technology of aluminum alloy
  • Air cold plate sealing forming technology of aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Aluminum alloy air-cooled cold plate

[0021] Dimensions of cold plate: 367mm×183mm×22mm

[0022] Processing steps

[0023] 1. CNC machining cold plate shell:

[0024] Clamping blank aluminum plate 373mm×216mm×25mm

[0025] 1. According to the structural design, the rough shape of the cold plate shell is processed 367mm×183mm×22mm, and six sides are milled, and the size is 367mm×183mm×22mm.

[0026] 2. Mill 247 in the center of the cold plate shell -0.15 -0.05 ×140 -0.15 -0.05 ×13mm square cavity, and then mill a 4mm wide step around it to ensure that the upper slot is 255, + 0.05 +05 ×148+ 0.05 + 015 ×4mm,

[0027] 3. Three brazing process holes of Φ2-3mm are opened at both ends of the cold plate shell;

[0028] 2. CNC machining cover plate:

[0029] Clamping blank aluminum plate 263mm×156mm×4mm

[0030] 1. Milling four sides, for size 255 -0.15 -0.05 ×148 -0.15 -0.05 ,

[0031] 2. Deburring, repairing four corners R3;

[0032] 3. Radi...

Embodiment 2

[0045] Embodiment 2: Aluminum alloy air-cooled cold plate

[0046] Dimensions of cold plate: 367mm×183mm×22mm

[0047] Processing steps

[0048] 1. CNC machining cold plate shell:

[0049] Clamping blank aluminum plate 373mm×216mm×25mm

[0050] 1. According to the structural design, the rough shape of the cold plate shell is processed 367mm×183mm×22mm, and the six sides are milled. The size is 367mm×183mm×22mm,

[0051] 2. Mill 247 in the center of the cold plate shell -0.15 -0.05 ×140 -0.15 -0.05 ×13mm square cavity, and then milling 4mm wide steps around to ensure that the upper groove is 255+ 0.05 +015 ×148+ 0.05 +005 ×4mm,

[0052] 3. Three brazing process holes of Φ2-3mm are opened at both ends of the cold plate shell;

[0053] 2. CNC machining cover plate:

[0054] Clamping blank aluminum plate 263mm×156mm×4mm

[0055] 1. Milling four sides, for size 255 -0.15 -0.05 ×148 -0.15 -0.05 ,

[0056] 2. Deburring, repairing four corners R3;

[0057] 3. Radia...

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Abstract

A aluminum alloy air-cooled freezing-plate sealing shaping process includes the following steps: 1. processing the appearance of freezing-plate, dissipating heat fins and cover plate parts according to structure design, the structure design of freezing-plate is flush type cavity structure, the two ends of freezing-plate shell is equipped with 2-3 soldering fabrication holes with diameter of 2-3mm; 2. welding the dissipating heat fins and freezing-plate shell, cover plate through the soldering method in nitrogen protection furnace; 3. milling out printed circuit board slots on the freezing-plate shell; welding the cover plate and shell vertical soldering seam through stirring friction welding; 5. mechanical processing the appearance and two end ventilators of freezing-plate according to the drawings requirements, processing the soldering fabrication holes into two end ventilators. The aluminum alloy freezing-plate using the art method of combination of soldering and stirring friction welding in the invention increases the resistant finely processed capacity of brazing seam surface, ensures the hermeticity requirement after finely process aluminum alloy freezing-plate and increases the welding yield rate of electronic structure cabinet.

Description

technical field [0001] The invention relates to the manufacture of an aluminum alloy air-cooled cold plate for an electronic equipment case. Background technique [0002] The chassis widely used in sea, land and air is a sophisticated and complex structure that receives the heat of internal components and exports the heat to the surrounding environment. The chassis realizes the heat dissipation requirements of the internal structure by introducing a certain pressure of cold air. In order to prevent the humid cooling air from condensing in the working environment with alternating temperature and humidity, which will affect the normal operation of the electronic equipment in the case, the case must adopt a full metal seal design. Generally, the air duct and connection welds of the case for radar are required to be airtight. 3.5Kpa without leakage. [0003] The geometric shape of the chassis is mostly a flat cuboid. Generally, the chassis is composed of a front frame, left and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/26H05K7/20B23K28/02B23K1/008B23K20/12B23K35/24B23K33/00B23C3/28
Inventor 冯杏梅
Owner CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
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