摩擦扭矩的计算机实时检测技术与数理模型建立

Real-time Measure Technique by Computer and Mathematical Model for Friction Torque in Continuous-drive Friction Welding

摩擦扭矩是保证获得高质量和高可靠性摩擦焊接头的关键参数。本研究在计算机系统的辅助下，通过对连续驱动摩擦焊驱动主电机定子电压（Ｖｏｌｔａｇｅ）和电流（Ｃｕｒｒｅｎｔ）信号的实时同步检测，根据摩擦焊能量传输的特点，采用独特的浮动求差（ＦｌｏａｔｉｎｇＥｖａｌｕａｔｉｏｎ）法，实现了连续驱动摩擦焊动态扭矩的实时快速检测，并对摩擦扭矩的变化规律进行了研究，首次建立了面向工程应用的准确可靠的摩擦扭矩数学物理模型。为深入探讨摩擦焊接表面摩擦学特性、焊接质量与摩擦扭矩间的内在关系奠定了良好的基础，具有很强的工程实用价值。

Friction torque is a key parameter to obtain high-quality and high-reliability welded joint. With the aid of the computer system, by real-time and synchronous measure of electric voltage(V) and current(C) of the main-motor stator winding in continuous-drive friction welding process, considering the power transmission characteristic of friction welding, and adopting unique floating evaluation(FE) new way, the real-time and high-speed measure of friction torque in continuous-drive friction welding has been successfully realized. At the same time, the rules of friction torque have also been discussed. And for the first time, the application-oriented reliable mathematical model for friction torque has been built successfully. All of these have laid down foundation for studying the physical characteristic of the friction interface and control of friction torque in conjunction with quality of continuous-drive friction welding.