The brown fused alumina flap disc, also known as an elastic grinding disc or flap wheel, is a commonly used grinding product for the surface treatment of metals and non-metals. The following are its details:
- Substrate: Usually made of vulcanized fiber paper or lightweight metal materials, it provides support and stability for the grinding disc, enabling it to withstand the pressure and impact force during the grinding process.
- Abrasive Cloth Flaps: They are made of brown fused alumina abrasive and cloth base through binders such as resin. Brown fused alumina has the characteristics of high hardness, good wear resistance, and excellent self-sharpening property, making it an ideal grinding material. The abrasive cloth flaps are arranged in a fan shape and stacked and bonded onto the substrate. The bonding angle of each piece of abrasive cloth on the plane of the tray is between 10° and 30°. This arrangement can optimize the grinding angle, ensure that the base material and the abrasive of the flap wheel are consumed synchronously, and improve the overall wear resistance and grinding efficiency.
- Mesh Cover (Optional): Some brown fused alumina flap discs are equipped with a plastic or fiber mesh cover, which is used to protect the abrasive cloth flaps, enhance the integrity and durability of the grinding disc, and prevent the abrasive cloth flaps from accidentally falling off during use.
- Number of Flaps: Common numbers include 36, 56, 72, 80, etc. Different numbers of flaps will affect the grinding effect and service life of the grinding disc. The more flaps there are, the larger the grinding area, and the relatively higher the grinding efficiency. However, the price may also increase accordingly.
- Grit: Generally ranging from 40# to 320#. Coarse grits such as 40# and 60# are suitable for quickly removing materials and rough machining, and can rapidly grind off burrs, flashings, etc. on the surface of the workpiece. Fine grits such as 180# and 320# are used for semi-finishing and finishing, which can give the workpiece surface a higher finish.
- Size: There are various specifications for the outer diameter. Common ones are 100mm, 115mm, 125mm, etc., and the inner diameter sizes are usually 16mm, 22mm, etc., to be compatible with different grinding equipment such as angle grinders.
- Good Elasticity: It has strong elasticity and can fit the surfaces of workpieces of various shapes well. During the grinding process, it can effectively buffer the grinding force, reduce the damage to the workpiece surface, and also reduce the vibration and noise during grinding.
- High Strength: The abrasive cloth flaps have high tensile and bending strength, are not easy to break, and can withstand relatively large grinding pressure and impact force, ensuring the stability and reliability of the grinding disc during use.
- Excellent Self-sharpening Property: The brown fused alumina abrasive will continuously break during the grinding process, generating new sharp cutting edges, enabling the grinding disc to always maintain good grinding performance. There is no need to replace the grinding disc frequently, which improves the grinding efficiency and reduces the usage cost.
- High Grinding Efficiency: It combines the characteristics of a grinding wheel and a vulcanized fiber paper grinding disc, allowing grinding and polishing to be completed in one step, reducing the workflow. Compared with a grinding wheel, it has the advantages of low vibration and low noise, effectively improving work efficiency and reducing labor intensity.
- Metal Processing: It is widely used in industries such as machinery manufacturing, automobile manufacturing, shipbuilding, and aerospace. It can carry out rough machining on metal products, such as grinding welding and stamping flashings, processing weld grooves, removing paint and rust, and deburring. It can also be used for the grinding and polishing of metal surfaces to improve the surface finish and precision.
- Hardware Product Processing: It is suitable for the grinding and polishing of hardware products such as cutting tools, tools, and molds, enabling them to meet the requirements of good surface quality and precision and improving the performance and service life of the products.
- Installation: Ensure that the grinding disc is correctly installed on equipment such as an angle grinder and is firmly fixed. Avoid looseness or eccentricity to prevent potential hazards during use.
- Parameter Selection: According to the material, hardness, and processing requirements of the workpiece, reasonably select parameters such as grinding speed, feed rate, and grinding pressure to avoid excessive wear of the grinding disc or poor surface quality of the workpiece due to improper parameter selection.
- Safety Protection: During use, operators should wear protective equipment such as safety goggles, masks, and gloves to prevent debris and dust generated during the grinding process from causing harm to the human body.
- Storage Conditions: Store the brown fused alumina flap disc in a dry and ventilated environment, avoiding moisture, rain, and direct sunlight, so as not to affect the performance and service life of the grinding disc.
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