The effect of the installation errors on beveloid gears' surface deviation is investigated by establishing the model of cone-shape worm wheel grinding beveloid gears. The sensitivity of tooth surface deviation to installation errors is analyzed. The results show that the helix slope, total deviation and tooth cumulative pitch deviation are more sensitive to gears' incline error. The tooth cumulative pitch deviation, profile total, slope deviation are more sensitive to gears' eccentric error. The effect of gears' incline error and eccentric error on cumulative and individual cumulative pitch deviation is inverse. Moreover the effect of the mounting angle error of cone-shape worm wheel on beveloid gears' surface deviation is very limited.
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