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煤矿竖井钻机所用的破岩工具——楔齿滚刀(图1),是具有冲击疲劳、弯曲变形、以磨粒磨损形式为主的恶劣条件下工作的机具。在钻岩过程中,滚刀刀齿在较大的载荷下压入岩石,将其压裂,当钻头旋转时,滚刀在摩擦力的作用下产生自转,把岩石剪切成碎片,岩石的碎屑在相对运动的滚刀与岩
Broken rock tools used in coal mine shaft drilling tools - wedge hob (Figure 1), is a tool with impact fatigue, bending deformation, mainly abrasive abrasive form of work under harsh conditions. During rock drilling, hob cutter teeth press into rocks under a large load and fracturing them. When the drill bit rotates, hobs rotate under the action of friction and shear the rocks into fragments, rock Debris in the relative movement of the hob and rock