LORI technology to introduce you - Friction stir welding manufacturing aluminum alloy water cooling plate technology, requirements for high-end electronic products, heat dissipation structure footprint as small as possible, the weight of the lighter the better, the more reliable performance, the better, air cooling fin radiator obviously unable to meet this requirement, the designer to gradually shift from air-cooling heat dissipation structure of the water-cooled heat dissipation structure, the solution is studied experimentally JiaGongShui involves what process can meet the design intent.
Currently, there are three schemes:
First, heat pipe heat dissipation;
Second, aluminum plate buried in the copper pipe to form a channel heat;
Three is an integral cold plate, directly in the aluminum plate milling groove, cover plate welding channel. The design schemes of the above three water cooling plates are analyzed as follows:
Heat pipe heat dissipation: the heat dissipation cycle is generally formed in the vacuum pipe body, but this scheme cannot make large cold plates, and is inconvenient for maintenance.
Buried pipe heat dissipation: the production cost of buried pipe heat dissipation is low. Mill the groove out of the aluminum plate and bury the copper pipe into the groove to form a closed channel. The copper pipe is filled with gum between the aluminum plate.This scheme can basically meet the requirements of heat dissipation, but the disadvantage is that the waterway is limited by the diameter of the copper pipe, local can not form a large heat dissipation interval, can not meet the heat dissipation requirements of some structural parts.
Integral cold plate: direct groove in the aluminum plate, plate welding forming channel, this needs to choose a kind of welding process on base plate and the cover plate sealing, preliminary selection of brazing process, brazing solder are the shortcomings of easy to lose, loss of solder may clog waterways, loss of the position of the solder will appear the phenomenon of not welded, led to the channel leakage.The high and low yield is subject to manual proficiency, a sense of responsibility, the consistency of solder alloy, the grasp of the fire in the furnace, the yield is about 80%. Too many uncertainties lead to the use of this process to weld liquid cold plate is not reliable, especially on important structural parts is rejected this process. It is because of the unreliability of the brazing process that radar electronic radiator seeks friction stir welding process to manufacture aluminium alloy water cooling plate.
Friction stir welding heat sink technology has shown incomparable advantages in water-cooled plate sealing and welding:
1, Normal temperature welding, no need to bevel, no need to fill, no need to vacuum, no need to gas protection;
2. Pleasant working environment, no noise, arc light and radiation during welding;
3. High yield, CNC operation, do not rely on manual proficiency;
4. High efficiency, 100% yield under the condition of constant material and correct parameters;
5. Please pay attention to whether other welding methods can effectively weld aluminum alloy.
Water cooling plate heat dissipation way will be overwhelming to replace the wind cooling heat dissipation structure, and friction stir welding technology will be incomparable advantages by the structural designers favor!
Friction stir welding manufacturing aluminium cold plate process
1. Raw materials are processed into waterways
2. The channel cover plate is assembled on the cold plate substrate
3. Friction stir welding process is adopted for welding
4.According to the requirements of the drawing processing, surface treatment.
More information about Lori liquid-cooled heatsink, please visit this page: http://www.lorithermal.com/liquid-cold-plate
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