操作机钳口凸齿结构对摩擦因数的影响

Influence of convex tooth structure of manipulator jaw on friction factor

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。

For the difficulty in determining the friction factor between forging manipulator jaw and workpiece interface and lacking of theoretical research, based on the influence of temperature on friction factor, the law of friction factor between jaw and workpieee interface changing with temperature in the clamping process of manipulator was analyzed. Then, the minimum friction factor in the clamping process of manipulation was determined, and the function and necessity of using convex tooth structure on the interface between jaw and workpieee were confirmed. Based on the contact features between forging manipulator jaw and workpieee, the extrusion condition of jaw convex tooth and workpiece was analyzed, and the influence of jaw convex tooth structure on friction resistance was studied to determine the equivalent friction factor. Finally, the inner relationship between the convex tooth structure parameter and the equivalent friction factor was researched to facilitate the reasonable results of the fraction factor and the jaw clamping force on the interface between jaw and workpiece.