Hybrid Bond CBN Grinding Wheels
Hybrid Bond CBN Grinding Wheels
- Select the Formula According to the Workpiece
- Resin has Good Self-Sharpening Properties
- Metal Binder has Good Wear Resistance
- Vitrified Binder Has Many Pores
Hybird bond CBN grinding wheels can maximize the advantages and improve the overall grinding wheel.
Hybrid bond CBN grinding wheel is made of CBN abrasive and bonding agent which is adjusted the ratio of resin, vitrified, and metal. It is a kind of superabrasive grinding wheel which has more features.
The features of CBN abrasive are good thermal stability and chemical inertness, as well as good thermal conductivity. It is the ideal choice for processing iron-based materials. The bonding agent is a key factor affecting the performance of CBN grinding wheels.
Resin bond CBN grinding wheel has good sharpness, low strength and cannot maintain the processing shape well. Frequent dressing the grinding wheel affect processing efficiency.
Vitrified bond CBN grinding wheel has many pores, and processed workpiece has coarse patterns. If the roughness of the processed workpice are high, it cannot meet the requirement.
Metal bond CBN grinding wheel has poor sharpness and self sharpening, and the heat generated during processing is prone to accumulate, causing the burns of the workpiece.
The features of hybrid bond CBN grinding wheels are good sharpness, excellent self-sharpening, high strength, and good shape retention.
Applications of Hybrid CBN Wheels
For example, hybrid bond CBN grinding wheels, which are used for grinding stainless steel blades.
The hybrid grinding layers are composed of CBN abrasive, hybrid bonding agent, and alumina whiskers. The hybrid bonding agent is composed of alloy powder and resin powder. The volume percentage ratios of CBN abrasive, hybrid bonding agent, and alumina whiskers in the grinding layer are 20-25%,60-70%, and 10-15%, respectively.
The volume percentage ratios of alloy powder and resin powder in the hybrid bonding agent are 70-80% and 20-30%. According to mass percentage, the alloy powder is composed of 50-60% copper powder, 40-50% tin powder, and 5-10% silver powder. The resin powder uses modified polyimide resin powder.
By adjusting the hybrid bonding agent, the resin and metal bonding agent have similar sintering temperatures.
At the same temperature, the two components can be bonded. Through experimental testing, under the same processing conditions, the processing liner speed, single feed rate, feed rate, dressing interval, service life, and comprehensive processing efficiency have been greatly improved.
Production Technology (resin-metal Hybrid Bond CBN Grinding Wheel)
- Ball mill the alloy powder, mix it with resin powder after sieving, and then sieve again, the sieve residue is the hybrid bonding agent.
- Mix the hybrid bonding agent with CBN abrasive, and sieve it. Then, mix the sieve residue with alumina whiskers and sieve again. The sieve residue is the hybid abrasive of CBN grinding layer.
- Put the grinding layer mixture to the mould of the substrate and obtain the CBN grinding wheel blanks by cold pressing.
- Sinter the CBN grinding wheel blanks in the reducing atmosphere, and obtain the profiled grinding wheel.
- After machining of the profiled grinding wheel body, obtain the resin-metal hyrbrid bond CBN grinding wheel.
Performance comparison of CBN wheels with various binders
Type of Binder | Self-Sharpening | Sharpness | Life | Dressing Difficulty | Price |
Metal | |||||
Resin | |||||
Vitrified | |||||
Electroplated | |||||
Metal-Resin |
Metal Diamond VS CBN grinding wheels
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