Yu Bai

Title: Innovations of Yu Bai in Composite Drilling Technology

Introduction

Yu Bai is a prominent inventor based in Dalian, China, known for his contributions to the field of machining fiber-reinforced composites. He holds a total of 3 patents, showcasing his innovative approach to improving drilling techniques for composite materials.

Latest Patents

One of Yu Bai's latest patents is a method for measuring the distribution of thrust force during the drilling of unidirectional composites. This invention focuses on the technical field of machining fiber-reinforced composites. The method involves cutting a composite sample to form a groove and drilling on an experimental platform to measure thrust force. By obtaining a curve of the thrust force during drilling and comparing it with conventional curves, the method identifies mutation points that correspond to fiber cutting angles. This allows for the calculation of thrust force distribution based on machining parameters.

Another significant patent is the development of a sawtooth structure with reversed cutting function and its drill series. This invention is designed for drilling low-damage holes in carbon fiber reinforced polymers (CFRP). The sawtooth structure consists of sawteeth and grooves on the cutting edges of the drill, arranged helically with a specific helix angle. This design effectively reduces delamination and burr defects at both the entrance and exit of holes. The series of drilling tools, including double point angle drills, twist drills, and stepped drills, all incorporate this innovative sawtooth structure, enhancing drilling performance and extending tool life while reducing costs.

Career Highlights

Yu Bai is affiliated with Dalian University of Technology, where he continues to advance research in composite materials and drilling technologies. His work has significantly impacted the efficiency and effectiveness of drilling processes in various applications.

Collaborations

Yu Bai collaborates with notable colleagues, including Fuji Wang and Zhenyuan Jia, contributing to a dynamic research environment focused on innovation in composite machining.

Conclusion

Yu Bai's innovative patents and research efforts have made substantial contributions to the field of composite drilling technology. His work not only enhances drilling performance but also addresses critical challenges in machining fiber-reinforced composites.