Technical Data／Diamond / CBN grinding wheel
Diamond / CBN Grinding Wheels (Super Abrasive Wheels) Diamond / CBN Grinding Wheel
Type and Features of Diamond / CBN Wheels
Resin Bond Wheel
Grid (Diamond / CBN)
Diamond / CBN abrasive grains, resin powder and filler are mixed and sintered in production. Phenol resin is generally used, but polyimide resin, excellent in heat resistance, is also coming into wide use.
Grinding is a processing method that performs very fine cutting by rotating a grinding wheel (whetstone) at high speed using many hard abrasive cutting edges. What is Grinding?
Bond (Resin)
・Because the abrasive grains are held by a resin with low elastic modulus (Young's modulus), good surface roughness can be obtained. ・Bond can be retracted well (excellent autogenous blade property) enough to last sharpness long. ■Features Metal material such as cemented carbide, cermet, and high speed steel from rough to finish grinding for certain materials such as fine ceramics, ferrite, and glass ■Applications
■Schematic Diagram of Grinding Process
■Difference Between Grinding and Cutting
Grinding
Cutting
Grinding Wheel
Chip
Abrasive Grains
Cutting Tool
Workpiece
Abrasive Grains
Core Material (Aluminum Alloy or Steel)
Thrust Force
Chip
Pore
Thrust Force
Principal Force
Binding Material
Principal Force
Workpiece
Workpiece
Metal Bond Wheel
Grid (Diamond / CBN)
Diamond / CBN abrasive grains, metal powder and filler are mixed and sintered in production. The metal powder used includes copper, tin, iron, cobalt, and tungsten. ・High wear resistance and high abrasive grain holding power allow extended wheel lifetime. ・Good sharpness is demonstrated with materials processed in brittle mode such as glass and ferrite. ・High thermal conductivity reduces thermal degradation of abrasive grains and bond caused by heat generated during grinding. ■Features Rough grinding for certain material such as glass, ceramics, ferrite, semiconductor material, and stone ■Applications
Chips
Fallen Abrasive Grains
Bond (Metal)
Diamond / CBN Grinding Wheels (Super Abrasive Wheels)
Grinding Wheels with Diamond and CBN are called “Superabrasive Wheels”, to distinguish from conventional wheels such as aluminum oxide and silicon carbide.
Why the Term "Wheel" for Super Abrasive Grains?
Core Material (Aluminum Alloy or Steel)
They were given the term "super abrasive wheel" by JIS because the Diamond Industry Association proposed to differentiate them from general abrasive whetstones. “Excerpt from JIS B 4131: 1998” Definition: The definitions of the main terms used in this standard are as follows: a) Wheel: Grinding and (abrasive) stones mainly with a (abrasive) grain layer around the periphery or end face of a metal base. It is called "wheel" to distinguish it from grinding and (abrasive) stones specified in JIS R 6210, JIS R 6212, etc. The wheel with a (abrasive) grain layer holding diamond and (abrasive) grains with a bonding agent is called "Diamond wheel" and the wheel with a (abrasive) grain layer holding CBN and (abrasive) grains with a bonding agent is called “CBN wheel."
Vitrified Bond Wheel
Bond (Vitrified)
Grid(Diamond /CBN)
Structure is stomatal where Diamond / CBN abrasive grains, ceramic powder mainly composed of glass, and fillers were mixed and sintered. It is a bond that has been used from the beginning as a bond for general whetstones (conventional whetstones). ・Good sharpness because of the stomatal structure. ・Excellent properties of truing / dressing make it suitable for high efficiency machining. ・Because CBN abrasive grains can be molded with a rotary dresser,mass production can be used to grind all parts. ■Features It is used for grinding of ferrous materials, cemented carbides, semiconductormaterials, sintered diamond and CBN, etc. ■Applications
Pore
Core Material (Steel, Aluminum Alloy, Ceramics)
Classification of Super Abrasive Wheels
Electroplated Wheel
Abrasives are fixed by Ni plating on the surface of steel bodies which have various kind of precise forms.
Resin Bond Wheel
Grid (Diamond / CBN)
*Resin Bond
Bond (Nickel Plating)
・Excellent durability of grinding ability due to large protrusion (following good chip discharging property). ・Excellent profile maintaining property due to large number of active grains. ・Easy to be formed and body is reusable. ■Features Form grinding of cemented carbide, ceramics, magnetic material and steel, etc. Dry grinding of rubber and FRP, etc. ■Applications
Diamond Wheel
Metal Bond Wheel
*Mainly Grinding Nonferrous Materials
Super Abrasive Wheel
*Metallic Bond
Vitrified Bond Wheel
CBN Wheel
*Ceramic Bond
*Mainly Grinding Ferrous Material
Core Material (Steel)
Electroplated Wheel
*Plating Fix
059
060
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