Research on drilling performance and tool life improvement methods of titanium alloy ultra-high-speed drilling bits

Titanium alloy materials have been increasingly applied in the field of 3C products. Manufacturers in the production process of 3C products relentlessly pursue high production efficiency, resulting in extremely aggressive selection of process parameters. Extreme machining conditions such as high spindle speed and large feed speed inevitably lead to severe tool wear, making tool cost difficult to control. Therefore, this paper focuses on researching methods to improve the drilling performance and tool life of titanium alloy ultra-high-speed drilling bits, in order to achieve low-cost manufacturing of titanium alloy ultra-high-speed drilling. Firstly, the failure modes and wear mechanisms of drilling bits under ultra-high-speed drilling conditions for titanium alloy materials are analyzed. Secondly, a drilling bit simulation model is established and calibrated through drilling experiments. Then, using the response surface method, design simulation experiments to reveal the influence of geometric parameters on drilling performance and optimize the drilling bit. Finally, based on the optimization results, drilling bits are prepared and drilling performance and tool life experiments are conducted. A comparison with unoptimized bits shows that the optimized drilling bits have significant improvements in drilling performance and tool life.