The self-sharpening property of ceramic resin wheel is one of its important characteristics, which is directly related to the maintenance of grinding efficiency. Self-sharpening property refers to the performance of the grinding wheel always maintaining a certain grinding ability when the surface abrasive grains fall off due to wear or force during the grinding process. Ceramic resin wheel shows a relatively ideal state in this regard due to its unique material combination and structural design.
The realization of its self-sharpening property is closely related to the characteristics of the binder. The resin binder used in ceramic resin wheel has appropriate strength and brittleness. During the grinding process, when the abrasive grains are worn to a certain extent and the grinding force exceeds the bonding strength of the binder, the worn abrasive grains will automatically fall off to make room for new abrasive grains. The "timely break" characteristic of this binder avoids the abrasive grains from losing their cutting ability due to excessive wear, thereby naturally maintaining the sharpness of the grinding wheel surface.
The distribution and hardness of the abrasive grains also affect the performance of self-sharpening. The abrasive grains in the ceramic resin wheel are evenly distributed, and the selected ceramic abrasive grains have a high hardness, which can keep the sharp state for a long time during the grinding process.
When some abrasive grains are worn, the gradual failure of the surrounding binder will drive these abrasive grains to fall off, while the unworn abrasive grains continue to work. The whole process is smooth and orderly, and there will be no sudden drop in efficiency, making the self-sharpening property continuous and stable.
In actual grinding operations, the self-sharpening property of the ceramic resin wheel makes it unnecessary to dress too frequently. For general metal or non-metallic material grinding, as long as the operating parameters are set reasonably, the grinding wheel can maintain effective grinding efficiency for a long time. For example, when plane grinding of ordinary steel, the abrasive grains on the surface of the grinding wheel will naturally renew with the grinding process, always maintaining sufficient cutting capacity, and reducing the number of interruptions due to dressing.
However, self-sharpening does not mean that dressing is completely unnecessary. When the hardness of the grinding material is high or the grinding amount is large, the surface of the grinding wheel may be over-worn and the abrasive grains fail to fall off in time, causing the surface of the grinding wheel to become smooth and the grinding efficiency to decrease. This phenomenon is called "grinding wheel passivation". At this time, proper dressing is required. The dressing tool is used to remove the surface passivated abrasive particles and residual impurities, restore the self-sharpening ability of the grinding wheel, and ensure that the grinding efficiency is not affected.
The frequency of dressing depends on the specific operating conditions. If the grinding material is soft, the grinding amount is small, and the cooling is sufficient during operation, the self-sharpening of the ceramic resin wheel can be maintained for a long time, and the dressing interval can be appropriately extended.
On the contrary, if the grinding material is hard, the grinding speed is fast, and the cooling is insufficient, the abrasive wear and binder failure rate of the grinding wheel surface will accelerate, and more frequent inspections and dressing may be required to avoid reduced grinding efficiency and workpiece surface quality caused by passivation.
The ceramic resin wheel has good self-sharpening properties. In most conventional grinding operations, it can maintain grinding efficiency through the natural shedding and renewal of abrasive particles, and does not require frequent dressing. However, under extreme operating conditions, timely dressing is still required according to the actual state of the grinding wheel. Reasonable use of its self-sharpening properties combined with necessary dressing measures can not only ensure the stability of grinding efficiency, but also extend the service life of the grinding wheel, so that the ceramic resin wheel can perform ideal performance in various grinding scenarios.
