Drills, drills, heating drills, will they be annealed?
When drilling cast iron, do not use or use 5% ~ 8% emulsion or kerosene. When drilling steel parts, use 3% ~ 7% emulsion. When deep hole machining or cutting speed is higher, feed amount should be large enough to supply enough cutting fluid to reduce the influence of thermal deformation on workpiece and improve the quality of machining.
So in need of cutting fluid filling drilling, cutting fluid can take away a lot of heat cutting when cutting, cutting temperature, and the cutting fluid can penetrate into the workpiece, cutting tool, the lubricating film formed between the chip and the tool and the workpiece, can reduce the friction between the chip, thereby reducing the cutting deformation of bue growth inhibition. And the cutting fluid can be a small chip away to avoid clogging timely or scratch the workpiece machined surface, reduce the surface roughness value, reduce the thermal deformation of workpiece and ensure the machining accuracy and improve production efficiency.
If the cutting heat is high, the tool material will be softened, the cutting performance of the tool will be reduced, and the tool wear will be accelerated, thus affecting the quality of workpiece processing and shortening the service life of the tool.
Drilling, drilling, heating, if the temperature is too high, will lead to accelerated drilling wear, and even annealing.The cutting heat in the cutting process due to friction deformation and cutting material separation and rub the cut material between, so drilling after jobs have hot feeling, but not as long as the cutting drill out of the blue or purple, generally does not cause a bit of annealing.
