How to improve the mechanical strength of diamond grinding wheel
Jul 23, 2020

In order to improve the heat resistance and mechanical strength of phenolic resin binder in diamond grinding wheels, the modification of phenolic resin was achieved by adding various fillers in the preparation process of resin grinding wheels.

If copper powder is added, the heat resistance of resin can be improved.

Adding zinc oxide, chromium oxide and other substances can improve the mechanical strength of the resin.

The addition of flake graphite, molybdenum disulfide and other soft materials can improve the grinding performance of resin bonded abrasive tools.

However, the most effective way to improve the properties of phenolic resin is to add organic modifiers, which may be because organic substances are more compatible with phenolic resin in terms of structure and surface properties than inorganic substances.

Polyimide resin is one of the best heat resistance resin, polyimide resin as binder preparation of diamond grinding wheel first appeared in the United States, then use spread throughout the world, its biggest characteristic is grinding wheel has good thermal stability, can be 250 ℃ in use for a long time, many durability is higher than phenolic resin bonded grinding wheel, often used in hard abrasive grinding wheel load of grinding.

Epoxy resin has good water resistance and strong adhesion, but its heat resistance is low. In the preparation process of abrasive tools, it is usually mixed with phenolic resin or polyimide resin, etc., which can improve the bond strength of resin binder without reducing the heat resistance of materials.

Polyurethane resin is also of low heat resistance, but the abrasive made of it is of great strength and is generally suitable for light grinding.

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