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Force characteristics in continuous path controlled crankpin grinding

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Abstract

Recent research on the grinding force involved in cylindrical plunge grinding has focused mainly on steady-state conditions. Unlike in conventional external cylindrical plunge grinding, the conditions between the grinding wheel and the crankpin change periodically in path controlled grinding because of the eccentricity of the crankpin and the constant rotational speed of the crankshaft. The objective of this study is to investigate the effects of various grinding conditions on the characteristics of the grinding force during continuous path controlled grinding. Path controlled plunge grinding is conducted at a constant rotational speed using a cubic boron nitride (CBN) wheel. The grinding force is determined by measuring the torque. The experimental results show that the force and torque vary sinusoidally during dry grinding and load grinding. The variations in the results reveal that the resultant grinding force and torque decrease with higher grinding speeds and increase with higher peripheral speeds of the pin and higher grinding depths. In path controlled grinding, unlike in conventional external cylindrical plunge grinding, the axial grinding force cannot be disregarded. The speeds and speed ratios of the workpiece and wheel are also analyzed, and the analysis results show that up-grinding and down-grinding occur during the grinding process. This paper proposes a method for describing the force behavior under varied process conditions during continuous path controlled grinding, which provides a beneficial reference for describing the material removal mechanism and for optimizing continuous controlled crankpin grinding.

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Authors and Affiliations

  1. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240, China

    Manchao Zhang & Zhenqiang Yao

Authors
  1. Manchao Zhang
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  2. Zhenqiang Yao
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Corresponding author

Correspondence to Zhenqiang Yao.

Additional information

Supported by National Science and Technology Major Project of China (Grant No. 2013ZX04002-031), Foundation for Innovative Research Groups of the National Natural Science Foundation of China(Grant No. 51121063), and State Key Laboratory of Mechanical System and Vibration of China(Grant No. MSV2D201412)

ZHANG Manchao, born in 1975, is currently a PhD candidate at State Key Lab of Mechanical System and Vibration, Shanghai Jiao Tong University, China. His main research interest is precision machining.

YAO Zhenqiang, born in 1962, is currently a professor at State Key Lab of Mechanical System and Vibration, Shanghai Jiao Tong University, China.

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Zhang, M., Yao, Z. Force characteristics in continuous path controlled crankpin grinding. Chin. J. Mech. Eng. 28, 331–337 (2015). https://doi.org/10.3901/CJME.2015.0107.007

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  • DOI: https://doi.org/10.3901/CJME.2015.0107.007

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