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Research on machining technology of high speed and ultra-thin wall parts

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Abstract

This paper mainly analyzes and experiments the processing technology of high speed (12000 r/min) and large proportion thin-wall parts (thickness/width = 1:80 and thickness/height = 1:120), so as to guide the machining of closed centrifugal impellers in aerospace. In this process, low melting point alloy is selected as the filling material to increase the rigidity of thin-walled parts and improve the indicated roughness of parts. Different low melting point alloy filling structures are carried out on large proportion of thin-wall sample parts. In addition, an auxiliary angle R is added at the stress concentration of the part itself to reduce the vibration caused by the machining path. For the results of simulation and test, the parts without filling low melting point alloy can not be processed and used at all, while the “tower” filling structure has fine cracks at the top of the thin-walled parts. The “column” filling structure increases the rigidity by about 19.97 % and the roughness by about 50 %.

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Acknowledgments

This research was funded by National Key Research and Development Program of China grant number [2018YFB2000 502] and [National Science and Technology Major Project of the Ministry of Science and Technology of China] grant number [2018ZX04002001] and [National Science and Technology Major Project] grant number [2017-VII-0001-0094].

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Authors and Affiliations

  1. School of Mechanical Engineering, **’an Jiaotong University, 28 **anning Road, **’an, Shaanxi, 710049, China

    Lai Hu, Yipeng Li & Yaolong Chen

Authors
  1. Lai Hu
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  2. Yipeng Li
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  3. Yaolong Chen
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Corresponding author

Correspondence to Yaolong Chen.

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Conflicts of Interest

The authors declare no conflicts of interest.

Lai Hu is a Dr. in Mechanical Engineering at **’an Jiaotong University. His main research field are the research of ultrahigh speed/ultra-precision machining and precision grinding technology. He has won more than 30 awards in national science and technology competitions and published more than 15 papers.

Yipeng Li is a Senior Engineer of **’an Jiaotong University. His main research fields are ultra-precision milling and grinding and processing technology research.

Yaolong Chen received his B.S. degree from **’an Jiaotong University in 1982, and received his Ph.D. degree (Dr.-Ing.) from University of Hannover in 1989, Germany. After finalizing his Ph.D. he worked as Research Engineer and Project Manager at the Carl Zeiss, as Technical Director at Loh Optikmaschinen AG, and as Chief Engineer at Berliner Glas. He is now a Full Professor in School of Mechanical Engineering of **’an Jiaotong University. His research interests include high Speed and high performance machining technology, precision components in machine tools, precision machining center design and development, measurement and control technology. Prof. Chen has completed or is in charge of more than 10 government projects and industry projects. He has authored in excess of 20 scientific publications, and 6 Germany and American patents.

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Hu, L., Li, Y. & Chen, Y. Research on machining technology of high speed and ultra-thin wall parts. J Mech Sci Technol 34, 4621–4629 (2020). https://doi.org/10.1007/s12206-020-1020-8

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  • DOI: https://doi.org/10.1007/s12206-020-1020-8

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