Abstract
Based on the geometric and kinematic relationship between the spiral guide rollers rib and the grinding wheel in the rib grinding with the special machine, the ribs shape surface after grinding was analysised, and the equations for the ground rib axial profile were established. Numerical analysis was conducted in an example, and the results show that the ground rib axial profile is approximately linear in most region, but seriously nonlinear in the root region of about 0.5mm height, and the profile inclination direction changes when the vertical angle of grinding wheel head is less than a value which is slightly less than the helix angle of the guide roller.
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