A 3D FEM Methodology for Air Hammer Bit Design

Abstract:

Based on the failure mode of air hammer bit, a mechanical model of the tooth on the inclined plane is established. And then a new air hammer flat bit with double declined planes and a big central plat (the outer inclined plane is 40° and the inner one is 20°) is designed. In order to reduce the design cost and cut down the design cycle, we establish a 3D contact model of 12 1/4″ full-scale flat bit, teeth and rock to choose a better end face structure from single and double declined planes, verify the rationality of bit parameters and tooth arrangement, design reasonable shrink range between tooth and tooth-Hole. This 3D FEM methodology for air hammer bit design is economical and useful, it can be used to optimize bit structure and design a new bit.

• Periodical: Advanced Materials Research (Volumes 156-157)
• Pages: 1435-1439
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.156-157.1435
• Online since: October 2010
• Authors: Hai Yan Zhu, Qing You Liu, Xiao Hua Xiao, Jia Jia Jing, Chao He
• Keywords: Air Drilling, Air Hammer Bit, Finite Element, Shrink Range, Tooth

References

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