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Investigation on shaping machining method for deep hole keyway based on on-line symmetry detection and compensation

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Abstract

Machining of deep hole keyway often suffers from low processing accuracy, low processing symmetry degree between keyway and the reference plane and is difficult to control. In order to enhance the processing quality, a mathematical model of space symmetry error was established based on space projection, orthogonal combination and linear fitting methods so as to study rotatable and shift-able space objects. The space symmetry error was separated into included angle error and displacement error between the fitting straight line and the benchmark line. Through included angle rotation and location measurement along with quantitative translation, the space symmetry error compensation was realized. On the basis of the proposed methods, a Double combined manual self-centering fixture (DCMSF) was designed to realize the radial self-centering and axial location for effective clamping of deep hole keyway, and the reference plane of built-in straight slot was derived out to make it detectable and controllable. Meanwhile, an Online multi-degree of freedom symmetry detection device (OMFSDD) and corresponding Numerical control (NC) programs were also designed for automatic detection and control of symmetry error. Subsequently, mass production of high symmetric deep hole keyway were realized by means of NC gear shaper servo control of rotating shaft angle compensation and bi-directional cutter back-off amount translation compensation, and combination of NC control of fixed angle processing. Deep hole keyway processing experiments indicate that the proposed method can steadily keep the symmetry within 0.03 mm. Thus, the rationality and accuracy of the proposed method was validated which provides a novel approach to high precision deep hole keyway processing.

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Authors and Affiliations

  1. College of Mechanical and Power Engineering, China Three Gorges University, Yichang, 443002, China

    Chunhua Zhao, Zhipeng Liang & Hongling Qin

  2. Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance, China Three Gorges University, Yichang, 443002, China

    Chunhua Zhao

  3. School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan, 430072, China

    Huawei Zhou

Authors
  1. Chunhua Zhao
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  2. Zhipeng Liang
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  3. Huawei Zhou
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  4. Hongling Qin
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Corresponding author

Correspondence to Zhipeng Liang.

Additional information

Recommended by Associate Editor Hyung Wook Park

Zhipeng Liang is a postgraduate in the College of Mechanical and Power Engineering, China Three Gorges University. He is also an Assistant Engineer. His research interests include mechanical design and theory, manufacturing science and technology of the symmetry on-line detection and compensation, etc.

Chunhua Zhao is a Professor at the College of Mechanical and Power Engineering, China Three Gorges University. She obtained her Ph.D. in Wuhan University of Technology in 2005. Her research interests include fault diagnosis, lubricating oil analysis, digital design and manufacturing, etc.

Huawei Zhou is a Ph.D. student in School of Water Resources and Hydropower Engineering, Wuhan University. Her research interests include engineering construction organization and management, concrete temperature control and crack prevention, etc.

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Zhao, C., Liang, Z., Zhou, H. et al. Investigation on shaping machining method for deep hole keyway based on on-line symmetry detection and compensation. J Mech Sci Technol 31, 1373–1381 (2017). https://doi.org/10.1007/s12206-017-0237-7

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  • DOI: https://doi.org/10.1007/s12206-017-0237-7

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