Pouring and encapsulating process for spherical friction stir welding of pre-extrusion of microchannel aluminum heat tube with narrow weld joint

Abstract

The invention belongs to the field of apparatus encapsulation and heat dissipation and relates to a pouring and encapsulating process for spherical friction stir welding of pre-extrusion of a microchannel aluminum heat tube with a narrow weld joint. The process mainly comprises the following steps of (1) vacuumizing an environment in the micro heat tube sealed at a single edge to a high vacuum state; (2) pouring a working medium of a certain quantity into the micro heat tube; (3) performing extruding and sealing by using an extruding and sealing device; (4) welding and sealing the micro heat tube by means of a spherical friction stir welding process, wherein a welding direction is along a position of 1 / 2 of an extruding and sealing line; (5) performing cutting in the position of 1 / 2 of a weld joint by means of the cutting device along a weld joint direction, and finishing a pouring and encapsulating process of a micro heat tube unit; and (6) removing the vacuumizing device and the pouring device. The process can manufacture the microchannel aluminum heat tube unit with only five steps, so that a medium sealing and unloading section is shortened greatly, the processing and manufacturing flow is simplified, and the process is high in utilization ratio of materials, good in encapsulating effect, low in rejection rate and high in production efficiency. A spherical stirring head islong in service life and a production process is green and environmental-friendly.

Description

technical field [0001] The invention belongs to the field of device packaging and heat dissipation, and relates to a microchannel aluminum heat pipe pre-extrusion narrow welding seam spherical friction stir welding pouring packaging technology. Background technique [0002] Microchannel aluminum flat tube is a thin-walled porous flat tubular part formed by refined aluminum rods through split welding and extrusion process. It is a key component of a new generation of parallel flow microchannel air conditioning heat exchangers (micro heat pipes). The heat transfer performance of the micro 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 micro heat pipe depends to a large extent on the perfusion package of the micro heat pipe. craft. [0003] At present, the manufacturing technology of micro-channel aluminum...

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

The existing micro heat pipe perfusion packaging technology has low material utilization rate, complicated production process, low production efficiency and high scrap rate

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