Abstract: In the light of the structural characteristics of carbon fiber prepregs and the problems existing in the traditional cutting process, an ultrasonic cutting device was designed using PC+ motion control card as the ultrasonic cutting mechanism control system and using servo drive to control its knife′s movement on the worktable. This paper focuses on the control of the cutter′s rotary motion in C axis,which will ensure the direction of ultrasonic cutting knife blade following the tangent direction of cutting graphics. Automatic cutting can be achieved by the upper computer programming software making programs and the PMAC motion control card issuing instructions to control servo drive driving feed movement of motor. Compared with the traditional cutting method, the ultrasonic cutting system has higher efficiency and better cutting quality.

Key words: multilayer fiber prepreg, ultrasonic cutting mechanism, PMAC, control system