Pendulum Cutting Test Standardization and Pertinent Cutting Fundamentals–(Part II)

The effective flow control of a chip cut by a sawtooth is related to gullet outline. All energy of elastic recovery must be dissipated in the cutting process phases and that remaining after chip crumbling is dissipated within the gullet. Three forms of cutting tools, used in pendulum dynamometers, are proposed for standardization. One form is a straight tool in which the hook angle of the tooth face continues the full length of the tooth shank. The second form has a specified tooth face angle and length and a specified fillet to eliminate effect of face angle on chip ejection velocity. The third form has an enclosed chip space that prevents escape of particles at velocities exceeding pendulum velocity. Discussion is presented on the treatment and selection of test blocks.

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