What are the dressing methods for diamond grinding wheels?

1. Grinding and dressing method When dressing the diamond grinding wheel, the silicon carbide abrasive grinding wheel and the diamond grinding wheel are used for grinding. The diamond grinding wheel rotates, while the silicon carbide abrasive grinding wheel also performs the feeding motion while rotating, and the surface of the diamond grinding wheel is ground. The particles start to rotate slowly under the action of friction, and at the same time, a certain extrusion force is generated on the metal bond. With the continuous action of the friction force, the dull diamond particles fall off the surface of the grinding wheel, and the sharp diamond particles are exposed. out to achieve the purpose of diamond grinding wheel dressing.

The main advantages of the grinding dressing method are: simple structure, convenient operation, short dressing time, stable grinding speed, low grinding cost, high dressing precision, and easy control of shaping quality. It is mostly used for dressing ceramic and resin-bonded diamond grinding wheels. It is one of the most commonly used trimming methods.

2. Soft elastic dressing method In the soft elastic dressing method, the abrasive belt is placed on the abrasive belt wheel during dressing, the diamond grinding wheel rotates at high speed during dressing, the take-up wheel rotates slowly, the abrasive belt moves slowly on the belt wheel, and the abrasive belt and the grinding wheel are used. The contact force effectively removes the bonding agent between the abrasive grains on the surface of the diamond grinding wheel, so as to achieve the purpose of dressing.

Compared with other dressing methods, the soft elastic dressing method is more suitable for dressing metal-bonded diamond micro-powder grinding wheels, because metal-bond diamond micro-powder grinding wheels have both metal plasticity and high hardness, so dressing is quite difficult. In: the abrasive particles on the surface of the dressing tool are quickly worn away, followed by the easy blockage of the chip space of the dressing tool, making the dressing unable to continue. The dressing tool using the soft elastic dressing method - the abrasive belt is always in contact with the dressing grinding wheel with new sharp abrasive grains, which can form a good dressing environment and effectively remove the bonding agent between the abrasive grains on the surface of the diamond grinding wheel. Low cutting force and high grinding surface quality.

3. EDM dressing method In the process of dressing the diamond grinding wheel, the grinding wheel rotates at high speed, the diamond grinding wheel is connected to the positive pole of the power supply, the tool electrode is connected to the negative pole of the power supply, and grinding coolant is sprayed between the diamond grinding wheel and the tool electrode, and the voltage is applied. Between the tool electrode and the grinding wheel, spark discharge is generated between the metal binder of the grinding wheel and the dressing electrode. The high temperature of the instantaneous discharge causes the metal binder to vaporize, the metal binder on the surface of the grinding wheel is effectively removed, and the diamond abrasive particles are removed. Fully exposed to realize the dressing of the grinding wheel, mostly used for the grinding wheel with metal bond

4. Laser dressing method The laser dressing method uses an optical system to focus the laser beam into a small spot and act on the surface of the grinding wheel. Except for a small part of the laser that is reflected, most of the laser is absorbed by the metal binder, and the temperature rises rapidly. In the area irradiated by the laser beam, the metal binder is vaporized and removed. The removal of the binder material usually goes through several processes: irradiation, absorption, temperature rise, and vaporization. When laser repairing the grinding wheel, reasonable control of the laser power and density can simultaneously remove the diamond abrasive particles and the bonding agent material on the surface of the grinding wheel to achieve the purpose of shaping the grinding wheel. By adjusting the laser processing parameters, the bonding agent on the surface of the grinding wheel can also be selectively removed. material, so that the diamond abrasive grains have a certain protrusion height to achieve the purpose of sharpening the grinding wheel.