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针对锻造操作机钳口与工件接触面摩擦因数确定困难和缺乏理论研究的问题,依据温度对摩擦因数的影响,分析了操作机夹持工件过程中钳口与工件接触面摩擦因数随温度变化的规律,明确了操作机夹持工件过程的最小摩擦因数,确定了钳口与工件接触表面采用凸齿结构的作用和必要性。结合锻造操作机钳口与工件的接触特点,分析了钳口凸齿与工件的挤压工况,研究了钳口凸齿结构对摩擦阻力的影响,并确定了当量摩擦因数,明确了凸齿结构参数与当量摩擦因数的内在关系,为合理确定钳口与工件接触面摩擦因数和钳口夹持力提供了条件。
Aiming at the difficulty in determining the friction coefficient of the contact surface between the forging manipulator and the workpiece and the lack of theoretical research, according to the influence of temperature on the friction coefficient, the friction coefficient of the contact surface between the jaw and the workpiece during operation of the manipulator is analyzed. Law, a clear operation of the workpiece clamping process the minimum friction factor to determine the contact surface of the jaw and the use of convex tooth structure of the role and necessity. Based on the contact characteristics of the forging manipulator jaws and the workpiece, the squeezing conditions of the jaw teeth and the workpiece were analyzed. The influence of the jaw tooth structure on the frictional resistance was studied. The equivalent friction coefficient was determined, The inherent relationship between the structural parameters and the equivalent friction coefficient provides the conditions for the reasonable determination of the friction coefficient between the jaw and the workpiece contact surface and the nip clamping force.