Hu GONG, Fang-qi CHEN, Tao WANG, et al. Micro-texture law of ceramic artificial hip ball ultra-precision grinding[J]. Optics and precision engineering, 2019, 27(9): 1926-1934.
DOI:
Hu GONG, Fang-qi CHEN, Tao WANG, et al. Micro-texture law of ceramic artificial hip ball ultra-precision grinding[J]. Optics and precision engineering, 2019, 27(9): 1926-1934. DOI: 10.3788/OPE.20192709.1926.
Micro-texture law of ceramic artificial hip ball ultra-precision grinding
The ceramic hip ball is one of the important parts in artificial hip replacement surgery. In order to realize the high-efficiency and high-quality processing of the ceramic hip ball
a rotating ultrasonic-assisted spherical grinding device was built in this study. First
the basic principle of rotary ultrasonic-assisted spherical grinding was introduced. Then
according to the motion characteristics of the device
the equation of the trajectory of the abrasive particle was established. Combined with the kinematic equation
the kinematic trajectory analysis of the abrasive grains in the processing state was carried out
the forming law of the spherical microtexture was studied in detail. Finally
an ultrasonic-assisted grinding of ceramic artificial hip joint ball experiment was performed. The results show that
at tool speed of 3000 r/min and workpiece rotation speed of 2011 r/min
the average surface roughness is 96 nm
and the line roughness average is 56 nm. When the rotational speed of the ceramic ball and grinding wheel are mutually prime
the texture distribution of the spherical surface is more uniform
which provides an important theoretical basis for the optimization of processing parameters.
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references
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