Abstract
A fast tool feeding mechanism with 2 degrees of freedom was proposed in this paper. The mechanism was directly driven and could compensate for changes in the cutting angle caused by contour adjustments. A turning system with constant cutting angle and speed were designed with the mechanism, which had many advantages including adjustable cutting angle, improving machined surface quality, reducing tool wear, extending the service life of tool, and so on. A model of the variable angle compensation movement of noncircular cross section part turning and its control algorithms was discussed according to the principle of inverse kinematics. With the machining of a convex oval piston taken as an example, a real convex oval piston model with a maximum ovality of 10 mm was processed through the fast tool feeding mechanism. Experiment results verified the design concept and control strategy of the mechanism.
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