The use of cubic boron nitride cutting tools Matters

If the correct choice of cutting, tool geometry and other processing conditions, it is an efficient long-life PCBN cutting tools, to create a high economic benefits,

but if you use improper methods, it will cause a great waste.
(A) a reasonable choice of cutting parameters: cutting speed should be selected according to material to be processed, generally much higher than the carbide tools.

Cutting hardness HRC55 ~ 65 optional cutting of hardened steel 80 ~ 120m/min, because PCBN cutting hard materials is minimal region of the cutting region and for the

softening of the metal, so the cutting speed is too low, can not play PCBN cutting tools. Feed generally not greater than 0.2mm / r, cutting depth generally choose

less than 0.3mm.
(2) a reasonable choice of tool geometry parameters: Since PCBN tool toughness than ceramics, less than carbide, so the choice of tool geometry parameters of the main

consideration is to ensure edge strength, rake angle generally opt (0 ° ~ -10 °), after selecting a smaller angle, of 10 ° or so. Addition to special requirements

in order to ensure tip strength, knife sharp corners generally not less than 90 °; blade to grind negative chamfer, generally taken to be 0.2mm × (-15 ° ~ -30 °),

before use use 30 ~ 50 times the magnifying glass on the tool checks to ensure cutting edge without chipping.
(3) cooling and lubrication: the tool to other materials, the use of coolant will help improve surface finish and longer tool life, but for PCBN tools except in very

special circumstances, do not add coolant to achieve the desired processing of the same quality and longer tool life of PCBN cutting tool is not afraid of hard afraid

soft. If coolant is used, you can not use water-soluble coolant, because cubic boron nitride easy to produce at 1000 ℃, hydrolysis, resulting in a serious tool wear.
(4) of the machine process systems: As PCBN tool used for hardened steel and cast iron and other difficult to machine materials, cutting and chamfering tool has a

negative, and thus greater radial force. This requires the machine rigidity and precision is better, the system vibration to be small, smaller cantilever installation

tool, PCBN cutting tool should not be used for waste-sided machining.
At present, although the relative price of PCBN cutting tool material carbide and ceramic tools price is also high, but equally to each of the tool on the workpiece

material costs are lower than other tools, the use of advanced machining technology when, if grinding machine apportioned the cost of production and other equipment

investment, the use of PCBN tools will bring greater economic benefits. SMEs in general, finishing grinding process is always the bottleneck in the manufacturing

process, if the purchase of good performance lathes, using PCBN cutting tools , application to turning instead of grinding and other advanced machining technology, you

can save equipment investment, improve productivity, but also greatly increase the flexibility of the processing. In addition, the present due to the increase of

personnel costs and environmental requirements, and vigorously promote the use of PCBN cutting tools, give full play to their potential effectiveness, improve the

level of machining technology is of great significance.