Rational use of PCBN insert

Because PCBN cutting tool materials have excellent cutting performance, it is particularly suitable for processing in its hardness above HRC45 hardened steel, cast iron, heat-resistant alloys HRC35 and HRC30 or less and more difficult to process other blades pearlitic gray cast iron.

(1) when hard cutting, large radial force, which requires larger power tools, machine tools, system rigidity is better, which not only protect the PCBN cutting tool, and be satisfied with the processing results. PCBN cutting blade commonly used dosage

Workpiece material cutting speed (m / min) feed rate (mm / r) Cutting depth (mm)

Gray cast iron 180 ~ 230HB 400 ~ 1000 0.15 ~ 0.5 0.12 ~ 2.0

Hard cast iron 400HB 70 ~ 150 0.15 ~ 0.5 0.12 ~ 2.0

Hardened steel 45HRC 60 ~ 140 0.15 ~ 0.5 0.2 ~ 2.5

Heat-resistant alloy 35HRC 100 ~ 240 0.05 ~ 0.3 0.1 ~ 2.5

(2) lower than the strength of PCBN insert carbide cutting tools, so when hard cutting machining, generally using a negative rake angle, the larger the negative rear corner and chamfer, which is not only conducive to the cutting edge is reinforced, but also has good wear resistance.

(3) to work well with PCBN tool, stable control of the quality of the workpiece, it is essential to accurately determine the durability of the PCBN tool.

(4) For high hardness and irregular workpiece due PCBN inserts more brittle, afraid of the impact. From the workpiece face cut, cut out, especially in the surface slag, trachoma, uneven, the most prone shocks occur, so that the cutting edge rupture, resulting in reduced durability.

(5) PCBN cutting tool suitable for machining softer ferrous materials.

(6) to determine the cutting speed, feed rate and depth of cut to be taken into account productivity and processing costs.

(7) the use of PCBN insert, coolant can be added, or not added, the use of the cooling liquid must be cooled sufficiently.

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