【摘要】 本文以摩擦学理论为基础,运用微观分析方法,探讨了孕镶金刚石钻头胎体磨损受岩屑粒度、骨架颗粒尺寸和唇部间隙等几何因素影响问题。特别是对硬磨粒磨损的粒度条件、唇部间隙对磨粒载荷的影响,以及骨架成分粒度对硬磨粒磨损和软磨粒磨损的不同影响进行了理论分析和阐述。更多还原

【Abstract】 On the basis of friction theory,the present paper deals with the problem that the wearing of diamond impregnated bit crown isaffected by some geometrical factors,such as:grain size of drilling cuttings,dimension of bit frame grains and clearance of bit face.In particular,the influence of grain size upon the wearing of hard abrasive grains,the influence of bit face clearance upon the loadcapacity of abrasive grains and the different influences of grain size of different bit frame composition upon the wearing of hardand soft abrasive grains are analysed theoretically and expounded in detail.更多还原