According to the grinding object to choose the appropriate grinding sheet, you can consider from the following aspects:
** A, grinding object material **
1. Metal material
- For metals with low hardness, such as aluminum, copper, etc., you can choose alumina grinding pieces, which have moderate grinding force and are not easy to cause excessive wear.
- For metals with higher hardness, such as stainless steel, tool steel, etc., diamond or silicon carbide grinding sheets are more suitable, they can provide greater grinding capacity.
2. Non-metal material
- Ceramic materials usually require diamond grinding pieces to cope with their high hardness.
- Glass materials generally use cerium oxide or alumina grinding pieces, which can ensure the grinding effect while reducing the damage to the glass surface.
Second, the surface condition of the grinding object **
1. Rough surfaces
- If the surface roughness is large, coarse grain grinding pieces can be selected in the initial grinding stage, such as 80-120 mesh, in order to quickly remove a large amount of surplus.
2. There is a certain level of surface
- Select medium and fine grinding pieces, such as 240-600 mesh, for further leveling and refining treatment.
3. Shape and size of the grinding object **
1. Surface grinding
- The large area of the surface is suitable for the use of larger sizes of grinding pieces, improve work efficiency.
- Small area flat or narrow parts, should choose a small size, flexible shape grinding pieces, such as round or square small diameter grinding pieces.
2. Surface grinding
- Choose a flexible or bendable grinding piece to fit the curved shape.
3. Inner hole grinding
- Specially designed inner hole grinding disc, size and shape to match the inner hole.
** Four, grinding accuracy requirements **
1. High precision requirements
- Select fine particle size and good flatness grinding pieces, such as diamond or cerium oxide grinding pieces of more than 800 mesh.
2. General accuracy requirements
- Medium particle size grinding pieces, such as 180-320 mesh, usually meet the demand.
For example, when grinding a stainless steel plate, if the surface is rough and needs to achieve higher flatness and accuracy, you can start with 120 purpose silicon carbide grinding pieces for rough grinding, and then use 320 mesh, 600 mesh and 1000 purpose diamond grinding pieces for gradual grinding.
For example, for the grinding and polishing of the curved part of a ceramic craft, you should choose a diamond grinding sheet with good flexibility, and gradually transition from a coarser particle size to a fine particle size to achieve a smooth and delicate surface effect.