2013年7月26日星期五

Single crystal diamond tool


In the ultra-precision machining, to ensure the quality of the machined surface of the main factors in addition to high-precision machinecutting tools , ultra stable

processing environment, the quality of the tool is also an important aspect. Natural diamond with high hardness, good wear resistance, high strength, good thermal

conductivity, and

Non-ferrous low coefficient of friction and excellent anti-adhesion, good corrosion resistance and chemical stability, can grind extremely sharp blade is considered to

be the best ultra-precision cutting tool material, especially in the field of mechanical processing ultra-precision processing sector has an important

Status and are widely used.
The physical properties of single crystal diamond
Carbon atoms, a single diamond crystal, the crystal structure belongs to a face-centered cubic equiaxed crystal (an atomic crystal highest density). Carbon atoms in

the diamond bond of connection between sp3 hybridized covalent bond, it has a strong binding force, and directional stability.

It is the hardest known natural material, the hardness of up 10000HV, other physical properties see below.
Superiority
Because the physical properties of single crystal diamond itself, cutting knife is not easy to stick and BUE, good surface quality, processing non-ferrous metals, the

surface roughness up Rz0.1 ~ 0.05μm. Diamond also effective processing of non-ferrous metal materials and non-metallic materials,

Such as copper, aluminum and other nonferrous metals and alloys, ceramics, non-sintered carbide, a variety of fiber and particulate reinforced composite materials,

plastics, rubber, graphite, glass and various wear-resistant timber (especially solid wood and plywood, MDF and other composite materials).
Natural characteristics of single crystal diamond tool sharpening
Ultra-precision machining, single crystal diamond tool two basic contour accuracy and precision is the cutting edge of the Diamond blade edge radius. Aspheric lens processing

requirements of the arc tool edge with a roundness of 0.05μm or less, the processing of the polygon mirror with a 0.02μm edge straightness

; Blunt tool edge radius (ρ value) indicates the degree sharp edge of the tool, in order to meet a variety of processing requirements, the blade edge radius ranging

from 20nm ~ 1μm.

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