Study on Inner Micro-Grooves of Heat Pipe Spinning Process and Multi-Tooth Mandrel

Yong Li; Yong Tang; Xi Bing Li; Wen Jun Deng; Zhi Xin Zeng

doi:10.4028/www.scientific.net/KEM.375-376.358

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 375-376Study on Inner Micro-Grooves of Heat Pipe Spinning...

Study on Inner Micro-Grooves of Heat Pipe Spinning Process and Multi-Tooth Mandrel

Abstract:

The manufacturing process of micro-grooves inside thin-walled copper heat-pipe is always complicated and difficult. Separately adopted GCr15 and W18Cr4V multi-tooth mandrel, a series of experiments have been done to machine axially inner micro-grooves of micro-heat-pipe with oil-filled steel-ball spinning technology to analyze the mandrel effect and failure mechanism. It was studied how the tooth-shape of multi-tooth mandrel affects the inner micro-groove shape of the copper tube and how the working position of multi-tooth mandrel affects groove-wall surface morphology and groove path. The wear and fracture characteristics of multi-tooth mandrel are introduced. It is proved that the form of GCr15 mandrel failure in machining micro-grooves is tooth-broken or tooth-collapsed, and its service life is short. Differently, the form of W18Cr4V mandrel failure is felt wear, and its service life is long.

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Key Engineering Materials (Volumes 375-376)

Pages:

358-363

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.375-376.358

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Online since:

March 2008

Authors:

Yong Li, Yong Tang, Xi Bing Li, Wen Jun Deng, Zhi Xin Zeng

Keywords:

Ball-Spinning, Micro Groove, Micro Heat Pipe, Multi-Tooth Mandrel, Wear

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