should be selected grinding and profile grinding wheel hard to maintain the required shape precision grinding.
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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