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

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 375-376)

Edited by:

Yingxue Yao, Xipeng Xu and Dunwen Zuo

Pages:

358-363

DOI:

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

Citation:

Y. Li et al., "Study on Inner Micro-Grooves of Heat Pipe Spinning Process and Multi-Tooth Mandrel", Key Engineering Materials, Vols. 375-376, pp. 358-363, 2008

Online since:

March 2008

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Price:

$35.00

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