High-efficiency needle-free friction stir welding perfusion packaging process for porous microchannel aluminum heat pipes

Abstract

The invention belongs to the field of device packaging and heat dissipation, and relates to a high-efficiency needle-free friction stir welding pouring packaging process for porous microchannel aluminum heat pipes, including: using a vacuum device to vacuumize the inside of the microchannel aluminum heat pipes that have been sealed on one side; The working fluid is poured into the microchannel aluminum heat pipe through the perfusion device; the microchannel aluminum heat pipe is welded and sealed by the needle-free friction stir welding process; the cutting device is used to cut along the direction of the weld at the 1 / 2 position of the weld, and the microchannel aluminum The heat pipe unit perfusion encapsulation process ends. The present invention only needs 4 processes including one clamping-vacuumizing-perfusion and one needle-free friction stir welding sealing to realize the perfusion and packaging manufacturing of the micro-channel aluminum heat pipe unit, which greatly shortens the processing and manufacturing process, and has high reliability and low scrap rate Low cost, high production efficiency, high material utilization rate, low performance requirements for packaging equipment, long service life of needle-free stirring head, and green production process.

Description

technical field [0001] The invention belongs to the field of device packaging and heat dissipation, and relates to a material-saving, high-efficiency needle-free friction-stir welding pouring and packaging process for a porous microchannel aluminum heat pipe. Background technique [0002] Micro-channel aluminum flat tube is a kind of thin-walled porous flat tubular part formed by refined aluminum rod through split welding and extrusion process. It is a key component of a new generation of parallel flow micro-channel air-conditioning heat exchanger (micro-channel aluminum heat pipe). The heat transfer performance of the microchannel aluminum heat pipe is affected by factors such as the perfusion amount of the working fluid, the perfusion vacuum, the working inclination angle, and the internal channel structure. Therefore, the heat transfer performance of the microchannel aluminum heat pipe depends to a large extent on the The perfusion encapsulation process of channel aluminu...

AI Technical Summary

Problems solved by technology

Moreover, one end of the aluminum flat tube needs to be pre-sealed before each production, and the excessively long blanking section also reduces the material utilization rate

Therefore, the existing microchannel aluminum heat pipe perfusion packaging process is complicated, the production efficiency is low, the material utilization rate is low, and the scrap rate is high.

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