Method to determine installing angle of conical point attack pick |
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Authors: | Song-yong Liu Xin-xia Cui Chang-long Du and Lin Fu |
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Affiliation: | School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China |
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Abstract: | In order to obtain the determining method of the installing angle and decrease the performance indices (cutting force and
wearing rate) of the pick, the relationships among the installing angles (impact angle, inclination angle and the skew angle)
were studied, and the static model of installing angles of the pick was built. The relationships among the impact angle, the
tip angle of pick and the kinematics parameters of the pick were built, too. Moreover, the mechanic models of the maximum
clearance angle and the wearing angle of the pick were set up. To research the relationships of the installing angles and
the change law of the wearing angle along with the kinematics parameters, the simulation was done. In order to verify the
correctness of the models, the cutting experiments were done by employing two picks with different pick tip angles. The results
indicate that, the cutting force is the smallest when the direction of the resultant force of pick follows its axis, and the
relationship derived among the installing angles should be satisfied. In addition, to decrease the cutting force and the wearing
of the pick, the tip angle of pick should not be larger than the half of the difference between the minimum wearing angle
and the impact angle of the pick, and the clearance angle must not be less than zero. |
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Keywords: | conical point attack pick cutting force installing angle wearing angle clearance angle |
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