Resin abrasives are organic abrasives characterized by their wide range of applications, elasticity, high bond strength, and excellent polishing properties.
They are used in a variety of grinding processes, including coarse, fine, and polishing. They possess the following characteristics:
1. High Bond Strength. Compared to vitrified bonds, resin bonds have a higher bond strength.
Resin grinding wheels can achieve linear speeds of 80-120 m/s and withstand high grinding pressures.
Heavy-duty grinding wheels can achieve grinding pressures of up to 10 × 10⁴ to 40 × 10⁴ N and are widely used in the steel industry,
such as rough grinding of various ingots and billets. High-speed, heavy-duty specialized grinding wheels offer safe operation in rough grinding operations,
are suitable for high-speed and high-feed grinding, and offer high grinding efficiency.
2. Resin abrasives exhibit superior toughness compared to vitrified abrasives, and possess a certain degree of plasticity and ductility.
Their elastic modulus (E) is several dozen times lower than that of vitrified abrasives.
Therefore, resin abrasives are suitable for producing thin-sheet grinding wheels and high-speed cutting wheels of various specifications.
At the same time, due to its elastic deformation, it can buffer the grinding forces.
This results in excellent grinding and polishing effects, improving the roughness of the machined surface.
3. Ability to produce a variety of complex shapes and special abrasive tools:
Because resin-bonded abrasive tools have a low curing temperature and can be cured at room temperature, with minimal shrinkage,
they can be made into a variety of complex shapes and special abrasive tools.
Examples include glass fiber-reinforced resin grinding wheels, porous resin grinding wheels and grooved grinding wheels with good chip removal and heat dissipation,
bolt-on grinding wheels for improved grinding process conditions, electrolytic grinding wheels,
and polishing wheels, as well as special-shaped grinding wheels such as cylindrical, bowl-shaped, and butterfly-shaped grinding wheels.
4. Wide Range of Applications: Due to the wide variety of new resin bonds, resin abrasive tools with various strengths and properties can be produced.
Therefore, they are widely used in rough grinding, coarse grinding, cutting, semi-finishing grinding, fine grinding, and polishing processes.
Resin abrasives have high bonding strength, high speed of use, and impact resistance, making them suitable for rough grinding and rough grinding.
Resin abrasives have good toughness and are suitable for cutting processes.
Resin abrasives have good elasticity and certain polishing properties, making them suitable for fine grinding and polishing.
Resin abrasives have low heat resistance and are easy to wear, making them suitable for surface grinding and fine grinding.
5. It is beneficial to prevent burns on the workpiece being ground. The resin bond has low heat resistance, which can reduce or avoid burns on the workpiece.
The heat generated by the workpiece during the grinding process first carbonizes the resin, causing the passivated abrasive to automatically fall off,
exposing new sharp abrasive grains, reducing the heat in the grinding area, and avoiding burns on the workpiece.
6. The hardening temperature of resin abrasives is low, the production cycle is short, and the equipment is simple, which is conducive to specialized production.
The disadvantages are:
(1) Resin abrasives have poor alkali resistance and water resistance and are easy to age.
The effective storage period is generally one year. Therefore, they cannot be stored for a long time.
(2) Resin abrasives have low heat resistance and are prone to wear during grinding, making them unsuitable for shaping and forming grinding.
(3) Resin abrasives have low porosity and produce odor during processing, so attention should be paid to environmental pollution issues.