Multi-stage drawing manufacturing method for superfine fluted tube

Abstract

The invention discloses a multi-stage drawing manufacturing method for a superfine fluted tube. The method comprises the following steps of: reducing the external diameter of one end of a copper tube with diameter of 6mm to 2.8 to 3mm on a forging hammer type pipe-shrinkage machine; then clamping and fixing a tube reduction die clamp on a horizontal lathe; allowing the diameter reduction section of the copper tube pass through a tube reduction die, clamping and fixing the tube reduction die on a tool rest of the horizontal lathe, starting the horizontal lathe, and drawing the whole copper tube to pass through the tube reduction die, wherein the tube reduction die comprises an induction section and a reforming section, the induction section is a cone-shaped face with cone angle of 20 to 40 DEG C, the reforming section is a round through hole, and under the extrusion of the tube reduction die, the green body of the copper tube performs plastic deformation and the external diameter is reduced; and after first drawing, replacing the tube reduction die by the tube reduction die with smaller through hole of the reforming section, and repeatedly drawing for multiple times until the external diameter of the copper tube is no more than 3mm. The method has the advantages of breaking through the restriction of the conventional manufacturing process for the fluted thermotube, obtaining superfine fluted tubes which have the diameter of no more than 3mm and good superfine fluted tube characteristic in batches, along with simple device and easy processing.

Description

technical field [0001] The invention relates to a method for manufacturing a heat pipe, in particular to a method for manufacturing a micro-grooved tube by multistage drawing. Background technique [0002] With the emergence of new features and phenomena such as the rapid increase of chip heat flux density and the decreasing effective heat dissipation space in the field of microelectronics, the traditional heat dissipation method of increasing the effective heat dissipation area can no longer meet its heat dissipation requirements, and has a simple structure and high efficiency. Small / miniature heat pipes with thermal conductivity, good isothermal properties, fast thermal response, and no need for additional electric drives have become ideal components for heat conduction of chips with high heat flux density. The heat transfer performance of the heat pipe mainly depends on the structure of the liquid-absorbing core on the inner wall of the pipe. Although the traditional cop...

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Problems solved by technology

However, limited by the size limit of the multi-tooth core and the spinning process, this method is only suitable for processing heat pipes with a diameter of about 6mm or even larger, and for heat pipes with a diameter of less than 3mm, especially for minimally invasive medical devices. Small heat pipes are useless

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