Investigation of the feasibility and effectiveness in using heat pipe-embedded drills by finite element analysis
Investigation of the feasibility and effectiveness in using heat pipe-embedded drills by finite element analysis
复制标题
DOI：
10.1007/s00170-012-4077-4
复制
发表时间：
2013-02
期刊：
影响因子：
--
通讯作者：
Lin Zhu;T. Jen;Cheng-Long Yin;X. Kong;Yi-Hsin Yen
中科院分区：
文献类型：
--
作者：
Lin Zhu;T. Jen;Cheng-Long Yin;X. Kong;Yi-Hsin Yen
钻削是一个非常苛刻的加工过程，伴随着热机械效应，其中机械功通过切屑形成和刀具与工件之间摩擦所涉及的塑性变形转化为热量。刀具-切屑界面处的升高的温度对工件的尺寸精度具有有害影响，并且缩短刀具的使用寿命。本文对热管冷却在钻井作业中的可行性和有效性进行了数值研究。采用新型嵌入式热管技术，将切削过程中刀具界面产生的热量带走。数值研究涉及四种不同的冷却条件，即，干式钻孔、流体冷却、热管冷却和供应切削液的热管冷却。采用基于显式有限元分析软件COSMOS\works的快速有限元加求解器进行数值计算，研究了钻头的热特性、结构静态特性和动态特性。结果表明，热管钻在实际钻进过程中是最可行和有效的。
Drilling is a sufficiently severe machining process coupled with thermomechanical effect, in which mechanical work is converted to heat through the plastic deformation involved in chip formation and friction between tool and workpiece. The elevated temperature at the tool–chip interface has deleterious effects on the dimensional accuracy of the workpiece and shortens the service life of the tool. In this paper, the feasibility and effectiveness of heat pipe cooling in drilling operations are investigated numerically. A new embedded heat pipe technology was utilized to remove the heat generated at the tool interface in the foregoing cutting process. Numerical studies involved four different cooling conditions, i.e., dry drilling, fluid cooling, heat pipe cooling, and heat pipe cooling with cutting fluid supplied. The thermal, structural static, and dynamic characteristics of the drill were investigated using a numerical calculation with fast finite element plus solvers based on explicit finite element analysis software COSMOS\works. The results demonstrate that the heat pipe drill is most feasible and effective in the actual drilling processes.