The production process of emery cloth roll has strict requirements on the base material, abrasive, binder and sand planting density. The premature end of the service life of abrasive cloth rolls is often caused by improper use. How to prolong the service life of abrasive cloth roll?
1. Rubber cover:
When a layer of metal material is covered on the abrasive cutting edge, adhesive coverage will occur. At this time, the surface of the emery cloth roll becomes bright and smooth to the touch. Bonding mainly occurs in high-strength metal materials, especially in hard materials. Insufficient grinding pressure is the main reason for cap sticking. For materials with high hardness, insufficient pressure makes it difficult for the abrasive to penetrate into the workpiece, making it difficult to break and self grind. Soft contact wheel or pressing plate, even if there is enough high grinding pressure, will only lead to serious collapse and abrasive particles difficult to press into the workpiece. The high speed operation of the emery cloth roll makes the abrasive grain time in the grinding area insufficient, the cutting depth of the workpiece becomes thinner, and the workpiece is thermogravimetric. The reasons for the sticking are quite comprehensive, and the solutions are also quite comprehensive. In other words, proper contact wheel or pressure plate, enough high grinding pressure and low speed abrasive cloth roll are the fundamental ways to solve this problem. Of course, it is also necessary to choose the abrasive tools with good self sharpening.
Emery roll
2. Direct grinding:
In the grinding process, although all the abrasives still exist, the sharpness is poor. This is because the grinding edge becomes blunt due to wear. This phenomenon is called blunt grinding. Normal grinding dullness is the end of the service life of abrasive cloth rolls. Obviously, the “dullness” we refer to here is caused by improper selection or use of abrasive cloth rolls when the abrasive grains are not exhausted. Soft contact wheel or pressure plate can hardly make abrasive particles cut into the workpiece, resulting in flat edge. Insufficient grinding pressure will also blunt the abrasive cloth grinding, making it difficult to sharpen the abrasive cloth itself. When the workpiece is hard, the selection of abrasive cloth roll is inappropriate, or the abrasive cloth roll speed is high, so it is difficult to cut into the workpiece for rough grinding. The abnormal wear of the abrasive cloth roll seriously affects the service life of the abrasive cloth roll and greatly increases the processing cost, which cannot be ignored.
3. Blocking:
When the abrasive grain gap is quickly covered and filled with chips before the abrasive grain edge is completely blunt, so that the abrasive cloth roll loses its cutting ability, blockage will occur. There are many reasons for clogging, mainly due to improper use, material processing, selection of abrasive cloth rolls, etc. The contact wheel or pressing plate is too soft, making it difficult for abrasive particles to penetrate into the workpiece. The abrasive cloth roll is mainly in grinding state. Friction heats the temperature of the processing area, causing the abrasive cloth roll to produce “welding” debris and cause plugging. The solution shall be hard contact wheel and pressing plate, or sharp tooth back contact wheel and pressing plate, small diameter contact wheel, etc. Due to the high speed of abrasive cloth roll, it is difficult for abrasive particles to cut into the workpiece effectively. Blockage and burns can also occur. At this time, reduce the speed of the emery cloth roll. Soft materials (such as aluminum, copper and other non-ferrous metals) can easily cause clogging on the surface of abrasive cloth rolls. The solution is to use sparse abrasive cloth rolls and coarse abrasive cloth rolls under the condition of meeting the roughness requirements. Use grinding aids such as emery cloth rolls and lubricants with high brittleness. The processing surface of the materials easy to block is smooth. For this material, abrasive cloth rolls that are easy to scratch, such as grease, coarse grain, etc., shall be overcoated. The product has good chip removal and anti clogging performance.
The above contents are arranged by small weaving of emery cloth rolls, and the views in this paper do not represent the views of this site.
Post time: Dec-30-2022