CFRP is a class of extremely strong and lightweight carbon fiber reinforced polymers, and used for various mechanical structures. Industrial applications for this type of material require high quality, efficiently drilled holes. However, it is difficult for conventional methods such as drilling and helical milling to meet the requirements. Hence a so-called tilt helical milling (THM) method has been previously proposed, which is performed by replacing the revolving motion of the tool in conventional helical milling with conical pendulum motion. During drilling of CFRP, the thrust force is an important factor, which affects the hole quality. Experiments are carried out on THM of CFRP, the effects of the cutting parameters and tool wear on the thrust force are analyzed, and the relation between hole quality and thrust force is also discussed.
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