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Analysis of the advantages and disadvantages of resin abrasives

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  • Analysis of the advantages and disadvantages of resin abrasives

    China's resin aluminum abrasive cutting disc are developing at a relatively fast pace. Whether it is from the production, quality and variety of products, it is growing year by year, especially in recent years, it has formed a flourishing situation. 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 requirements for the grinding load and strength of the cutting piece are getting higher and higher. It has been developed from the past portable cutting machine and the hanging cutting machine to today's high speed and heavy load. The billet 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 cutting blades has been developed from the past 30-50 kg to today's 1000 kg Above, it is difficult to achieve without a high strength binder.
    Second: 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 cutting piece can be formed. In order to increase the strength of the cutting piece, a glass mesh cloth and other metal 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 sheet cutting sheets of various specifications. It is widely used in the cutting and grooving process of many metal processing departments. The thinnest can reach 0.1 mm, which completes the processing tasks that cannot be completed by general saw blades. Especially after the high-speed reinforced cutting blades are widely used, the cutting blades are cut. The demand is increasing rapidly.

    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 agent cutting sheet is often used in the grinding and polishing process, and the grinding is performed under the same conditions, and the resin abrasive has a higher finish than the ceramic abrasive tool.

    Resin abrasives also have shortcomings
    First: poor heat resistance. The durability of the 5 inch resin cutting disc for metal will be affected. Therefore, when the dicing sheet is selected, the resin is harder than the ceramic binder under the same grinding conditions.

    Second: poor alkali resistance. 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: Resin abrasives have 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.