Heat pipe sealing structure, and its pressing method and special mould

Abstract

This invention relates to a sealing and stitching method for heat conducting pipes including: providing a die with a first and a second moulds and at least a surface of one is processed with die stamping to form multiple convexes and concaves, putting the open-end of a heat conduction pipe between the two moulds to apply pressure onto the open-end to close it simultaneously when passing through the concaves and convexes and let the extruded metal of the pipe extend to the multiple concaves and convexes to form an embossing closing part at the open-end, the embossing part is set on the special die and the sealing structure.

Description

technical field [0001] The invention relates to a heat pipe sealing and pressing method, in particular to a heat pipe sealing and pressing method which can increase the seal sealing strength and reduce the structural damage caused by processing. The invention also relates to the pressing method used A special mold and a heat pipe sealing structure made by the method. Background technique [0002] Generally, the existing sealing and pressing methods for heat pipes are either hammer-type necking or direct pressing, but all of the above-mentioned methods will cause stress concentration and lower ductility at the sealing part of the pipe body, and the subsequent bending and sealing During the flat manufacturing process, cracks or deepened structural damage are prone to occur at the seal, which greatly reduces the life of the heat pipe. [0003] like figure 1 , 2 , 3 is an example of the general heat pipe 1, 2, 3 sealing and pressing method. This pressing method is to squeeze ...

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Problems solved by technology

[0002] Generally, the existing sealing and pressing methods of heat pipes are either hammer-type necking or direct pressing, but the above-mentioned methods will cause stress concentration and decrease in ductility at the sealing part of the pipe body, and the subsequent bending and sealing During the flat manufacturing process, the seal is prone to cracks or deepens structural damage, which greatly reduces the life of the heat pipe

[0003] like figure 1 , 2 , 3 is an example of the sealing and pressing method of heat pipes 1, 2 and 3 in general. This pressing method is to extrude with a smooth surface male and female die (not shown in the figure). In order to seal the nozzle, The metal nozzles 11, 21, 31 are excessively stretched, and the bonding force is weak. When the internal pressure of the heat pipes 1, 2, and 3 is slightly high, it is easy to cause a vacuum loss situation

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