The study of CFRP variable feed drilling method based on sinusoidal curve

In order to reduce the delamination damage of carbon fiber–reinforced polymer (CFRP) drilling and improve quality, a variable feed method based on sinusoidal curve is proposed. That means, when at distance 1 mm from hole exit, rate drill would be reduced according rule curve. The compared with traditional by experiment, influence thrust force, factor, surface roughness wall exit morphology are analyzed. results show that constant-feed drilling, variable-feed reduces force near greatly improves exit. However, not particularly obvious.