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Advantages and disadvantages of resin abrasives
- Jan 09, 2019 -

Resin abrasives are developing at a relatively fast speed, and the output, quality and variety of products are increasing year by year, especially in recent years, a booming situation has emerged. Why resin binder abrasives will develop so quickly, in addition to objective conditions, such as the need for social needs, there are sufficient raw materials. The most fundamental reason is that it is inseparable from the unique properties of resin binders.

Let's talk about its advantages: first, its combination strength is high. Compared with other binders, the resin has high bonding strength, can be used at higher speeds, can withstand large grinding pressure, and is widely used in the burr and rough grinding of steel and foundry industries. With the improvement of the grinding process, the grinding load and strength requirements of the cutting piece are also getting higher and higher. It has been developed from the past portable grinder and suspended grinder to today's high-speed heavy-duty steel billet repair. Grinding machine, the speed of cutting blades has been developed from the past 35-40 m / s, today to 80-100 m / s, the load of the grinding wheel has been developed from the past 30-50 kg, today more than 1000 kg, if The absence of high strength binders is difficult to achieve.

Secondly, it can be made into special shapes and special needs. This is mainly because the resin binder is hardened under low temperature (below 200 ° C) conditions, and does not change the basic properties of the material, so that filler materials or embedding materials can be added for different needs. For example, in order to meet the grinding requirements, a grooved and porous grinding wheel can be made. In order to improve the strength of the grinding wheel, a glass mesh cloth and other wires can be added into the cutting piece. In order to increase the electrical conductivity, copper powder, aluminum powder and graphite powder may be added.

Third, it is suitable for manufacturing thin-plate grinding wheels of various specifications. It is widely used in the cutting and grooving processes of many metal processing departments. The thinnest can reach 0.1 mm. It completes the processing tasks that cannot be completed by general saw blades, especially the need for cutting wheels after the high-speed reinforced cutting blades are widely used. The amount increases very quickly.

Fourth, the resin binder has a certain elasticity. In the grinding process, it is beneficial to meet the requirements of high surface roughness of the workpiece. In the mechanical processing process, the resin grinding wheel is used in the fine grinding and polishing process, and the grinding is performed under the same conditions. The smoothness of the resin abrasive is higher than that of the ceramic abrasive.

However, resin abrasives also have disadvantages:

First, the heat resistance is poor. The durability of the cutting piece will be affected. Therefore, when the grinding wheel is selected, the resin is harder than the ceramic bond under the same grinding conditions.

Second, the alkali resistance is poor. Long-term storage in an alkaline solution, the resin is easily destroyed, and its bonding strength and hardness will gradually decrease. Therefore, alkaline, especially strong alkaline coolants should be avoided as much as possible during the grinding process with resin abrasives.

Third, the resin abrasive has poor water resistance. Long-term exposure to moisture, it is easy to reduce its bonding properties, so resin abrasives should not be stored for a long time, should be re-examined after more than one year.

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