Abstract
In order to solve the problem of significant chatter vibration and large drilling force when drilling stacked materials by industrial robot, a new method is proposed. It combines rotary ultrasonic drilling with robotic machining to achieve high efficiency and low damage for CFRP/aluminum stacks. In this paper, comparative experiments of robotic rotary ultrasonic drilling (RRUD) and robotic conventional drilling (RCD) on drilling CFRP/aluminum stacks are carried out in a KUKA six-axis industrial robot. Drilling force, drilling chatter and aperture deviation are measured and analyzed. The experimental results illustrate that high-frequency vibration can not only reduce drilling force effectively, but also have a good inhibitory effect on robotic drilling flutter. In addition, the improvement effect of ultrasonic vibration on aperture deviation for CFRP is more significant than that for aluminium.
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