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采用硬质合金单刃钻头在壳件零件上钻削孔数繁多的深孔时,切削稳定性要求高,这主要是因为钻头崩刃而可能使孔遭到破坏,又因为清除残留硬质合金颗粒的劳动量较大和刀具成本高所造成的结果。这这种钻头工作性能影响大的是机床——夹具——刀具——零件系统刚性和钻头在导套内的精确同心度以及当零件不旋转时钻头的轴线也需和机床主轴旋转轴线重合。深孔钻削不稳定的特性来源于硬质合金和被加工材料质量的不均匀性,因实际上没有预先进行质量的检查。切削过程中通常注意观察排出切屑的变化,主电动机消耗电流及冷
The use of carbide single-edged drill bits in the shell parts drilling a large number of holes deep hole, the cutting stability requirements are high, mainly because the bit collapses and the hole may be destroyed, and because the removal of residual hard alloy As a result of larger labor and higher tool costs. This drill bit performance is greatly affected by the exact concentricity of the machine-tool-tool-part system and the drill bit within the guide bush and the bit axis coincident with the machine spindle rotation axis when the part is not rotating. The characteristics of deep-hole drilling instability stem from the uneven quality of the cemented carbide and the material being processed as there is virtually no prior quality check. During the cutting process, usually observe the change of discharge chips, the main motor current consumption and cold