Dadong Li

Title: The Innovative Contributions of Dadong Li in Rail Welding Technology

Introduction

Dadong Li, an accomplished inventor based in Chengdu, China, has made significant strides in the field of rail welding technology. With a unique approach to mobile flash butt welding, his inventions contribute to advancing the quality and efficiency of rail construction.

Latest Patents

Dadong Li holds one notable patent: a mobile flash butt welding method specifically designed for 136RE+SS heat-treated rail. This invention introduces a comprehensive welding methodology that includes several stages: a pre-flash stage, flash stage, boost stage, upset stage, and forge stage. The method details a total heat input range of 7.1 MJ to 10.0 MJ, with a duration of 110 seconds to 135 seconds and an upsetting distance between 12.8 mm and 16.7 mm. This innovative approach successfully achieves mobile flash butt welding, providing rail joints with reduced internal defects and stable welding quality. The joints produced through this method not only meet various testing requirements, including fatigue, tensile, and slow bend tests, but they also pass the drop weight test for 15 welds consecutively, showcasing enhanced stability.

Career Highlights

Dadong Li is associated with the Pangang Group Research Institute Co., Ltd., where he has developed and refined his expertise in welding techniques. His commitment to innovation in this specialized field has garnered attention for its potential applications in various rail infrastructure projects.

Collaborations

Throughout his career, Dadong Li has worked alongside fellow innovators Xin Lu and Ruoyu Wang, sharing insights and strategies that have enhanced their collective work in rail welding technology. Their collaboration signifies the importance of teamwork in achieving groundbreaking advancements in engineering.

Conclusion

Dadong Li’s contributions to rail welding through his patented technology underscore the vital role of innovation in infrastructure development. His dedication to improving welding methods not only elevates the standards of rail construction but also exemplifies the spirit of innovation that drives progress in engineering and technology.