Structure design and service performance of bionic conical pick

Abstract

Heavy equipment such as continuous mining machines and shearers are widely used in coal mining projects, and conical picks are essential cutting tools. During the cutting process, different conical pick structures can have significant impacts on the cutting performance of the equipment, and the wear resistance of the conical picks will directly affect the efficiency and reliability of the equipment. In this paper, a bionic dimple-structured conical pick is designed, and a mathematical model of the dimple structure is established. The cutting performance, self-rotation performance, and wear resistance of dimple-type picks (DTPs) and ordinary-type picks (OTPs) are studied using the discrete element software EDEM and the dynamic analysis software ADAMS. The results show that during the cutting process, the trend of rotational torque over time for both types of conical picks first increases and then decreases, with the maximum rotational torque of DTP being greater than that of OTP, indicating that the self-rotation performance of DTP is superior to OTP. Compared with OTP, DTP exhibits a smaller total wear amount and better wear resistance performance. When comparing end plates equipped with DTP to those with OTP, the end plates with DTP have a smaller load fluctuation coefficient, lower cutting resistance, lower specific energy consumption for cutting, and greater total coal mass.