硬质合金-金刚石复合片在弹-塑性岩石(大理岩、石灰岩、砂岩)中的工作机理与孕镶金刚石钻头的工作机理有着本质性的区别。根据硬质合金-金刚石复合片在切削过程中的受力作用,研究了复合片切削刃的工作机理,并将理论计算与实验数据进行了对比。结果表明,在一定范围内,机械速度随着复合片切入岩石深度的增大而增大,而切入岩石的深度主要取决于复合片受到的轴向载荷及切削角等参数,且随着转速或轴向载荷增加,动荷系数B应取较小的值。分析结果有助于设计金刚石切削具和钻进参数。 The working mechanism of the cemented carbide-diamond composite in elastic-plastic rock (marble, limestone and sandstone) is essentially different from the working mechanism of the impregnated diamond bit. According to the force effect of the cemented carbide-diamond composite sheet during the cutting process, the working mechanism of the cutting edge of the composite sheet is studied, and the theoretical calculation and the experimental data are compared. The results show that the mechanical speed increases with the depth of the rock cut into the composite sheet within a certain range, and the depth of the rock depends mainly on the axial load and cutting angle of the composite sheet, and with the speed or Axial load increases, the dynamic load coefficient B should take a smaller value. The results of the analysis help to design diamond cutting tools and drilling parameters.