钎焊金刚石钻头制造过程热动力学仿真

Thermal Dynamic Simulation for Manufacturing Process of Brazed Diamond Bit

摘要:

本文以钎焊金刚石钻头为研究对象，对它在高温钎焊炉中的生产升温过程和降温冷却成型过程热动力学理论进行了分析总结，对整个实体模型从钎焊炉中取出后的降温冷却过程进行了数值仿真模拟。分析了钎焊金刚石钻头及石墨模具装配体降温过程的温度场，及其对钎焊钻头应力场的影响，分析了石墨心模与钎焊金刚石钻头之间的应力，并把仿真数据与解析解理论计算值进行比较，验证了钎焊金刚石钻头降温冷却过程数值仿真与理论解析值具有较好的一致性。

Abstract:

Taking the brazed diamond bit as research object, the paper analyzes and summarizes the thermal dynamic theory of the heating process in high temperature brazing furnace and the cooling molding process, and makes the numerical simulation for the cooling process on the whole entity model after being removed from the brazing furnace. By analyzing the temperature field of brazed diamond bit and cooling molding process as well as the effect of the temperature field on the stress field of brazed diamond bit, the stress between the inner graphite mold and the brazed diamond bit was also analyzed. The comparison was made on the simulation data with theoretical calculated values, which verified the good consistency between the numerical simulation and theoretical value of brazed diamond bit’s cooling process.