The main reasons for the deformation of the grinding wheel include the following:
Uneven mixing: In the production process of resin grinding wheels, if the mixing is uneven, it is easy to cause the grinding wheel to deform. Solutions to this problem include selecting suitable liquid and powder phenolic resins, adding dust removers when the mixture is dry, adding moisture absorbers when it is wet, and adjusting the order of adding materials to the upper and lower pots of the mixing pot.
Deformation after molding: Deformation after molding is usually caused by uneven material spreading. In order to avoid this situation, it is necessary to design a reasonable rotating material spreading mechanism to ensure uniform material spreading and avoid material stratification and spiral material spreading.
Mesh deformation: Mesh deformation may be due to unreasonable warp and weft yarns and matching of mesh blank fabrics, or deformation of impregnation cloth. Solving these problems requires adjusting the weaving and impregnation process of the mesh.
Unstable resin quality: The quality stability of the resin can also cause grinding wheel deformation. For example, excessive free phenol content in the resin will accelerate the resin cracking after the resin grinding wheel is heated and hardened, affecting the strength of the grinding wheel.
Uneven mixing: During the mixing process, if the mixture is unevenly distributed, the hardness and strength of the grinding wheel will be uneven, causing deformation. To solve this problem, it is necessary to strictly mix the materials according to the process requirements and replace the mixer parts that are too worn at any time.
Too high hot pressing temperature: Too high hot pressing temperature will cause the product to cool and heat rapidly, causing the grinding wheel to deform. To solve this problem, it is necessary to control the hot pressing temperature to avoid rapid cooling and heating.
Raw materials are damp: Raw materials are damp and deteriorated, which will also cause the grinding wheel to deform. To solve this problem, it is necessary to ensure the drying and storage conditions of the raw materials.
