What drills are used in stainless steel drilling?
Drilling drills are often used on stainless steel workpieces. Hardened carbide can be made from carbide drills. If conditions permit, we can use super hard high speed steel or ultra-fine Grain Cemented Carbide bit. When drilling, the torque and axial force are large, the chip is easy to bond, difficult to break, and the chip removal is difficult. The work hardening is intensified, the corner of the drill is easy to wear, the drill bit rigidity is poor, and vibration is easy to occur. So the drill grinding chip split groove, grinding chisel to reduce axial force, grinding double angle to improve the radiating conditions.
Stainless steel cutting drill martensitic stainless steel 2Crl3, just wear E-E chipbreaker; while drilling of lCrl8Ni9Ti austenitic stainless steel, but also need additional A-A chipbreaker.The characteristics of S type carbide drill is: chisel edge can reduce the axial force of 50%; a former angle is positive, sharp edge; web thickness increases, increase the drill rigidity; two jet cutting fluid hole; arc cutting edge and the chip distribution is reasonable, easy cutting into pieces. In order to facilitate discharge.The characteristics of transposition of cemented carbide drill for shallow holes is equipped with two front end of the drill bit is asymmetric convex triangular blades, different parts of the chip removal hole, automatic centering, straight hole, and the cutting length is short; blade rake face is provided with a plurality of pit groove cutting, good performance especially reliable chip breaking, the chip is consistent with the broken chip cooling; the cutting fluid is directly sprayed to drilling surface, improve the cooling effect, chip very smooth; especially according to the hard alloy blade with different grades of workpiece materials, cutting speed is 80 ~ 120m/min, drilling is very brisk.
We can also use stainless steel chip breaker, S carbide drill, four bit drill bit and indexable carbide drill.
Usually use the most commonly used high-speed steel twist drill, then the horizontal edge length, edge of the anterior horn of the dots can be repaired. On condition that the chip can be removed and removed, the cutting environment can be improved. At the same time, select smaller cutting parameters and adequate coolant.
