How to choose the appropriate grinding wheel？

Choosing the appropriate grinding wheel is an important step in ensuring the quality, efficiency, and safety of grinding processes.

1.  Selection of abrasives

The choice of abrasive mainly depends on the properties, hardness, and heat treatment method of the workpiece material.

High tensile strength material: Select abrasives with high toughness, such as brown corundum. Brown corundum is suitable for grinding carbon steel, alloy steel, malleable cast iron, hard bronze, etc.

Low hardness, high elongation materials: brittle abrasives such as black silicon carbide are selected. Black silicon carbide is suitable for grinding materials with low mechanical strength such as cast iron, brass, aluminum, etc.

High hardness materials: Use abrasives with higher hardness, such as green silicon carbide. Green silicon carbide is suitable for grinding hard and brittle materials such as hard alloys, optical glass, ceramics, etc.

Special requirements: Select abrasives such as chromium corundum, single crystal corundum, microcrystalline corundum, and zirconia corundum according to specific needs. For example, chromium corundum is suitable for grinding workpieces with high surface processing quality requirements such as cutting tools and measuring tools; Zirconia corundum is suitable for grinding austenitic stainless steel, titanium alloys, etc.

2.  Selection of granularity

Grain size refers to the particle size of abrasive, which directly affects grinding efficiency and workpiece surface roughness.

Coarse grained grinding wheel: suitable for situations with large grinding allowance and low requirements for surface roughness, it can improve grinding efficiency.

Fine grained grinding wheel: suitable for precision grinding and polishing operations that require high surface roughness, but with relatively low grinding efficiency.

3.  Selection of Hardness

The hardness of a grinding wheel refers to the ease with which abrasive particles detach under external force.

Soft grinding wheel: suitable for grinding soft materials or easily deformed workpieces, because soft grinding wheels have good self sharpening properties and abrasive particles are easy to fall off, forming new cutting edges.

Hard grinding wheel: suitable for grinding hard materials or situations where the geometric shape of the grinding wheel needs to be maintained to prevent rapid wear of the wheel.

4. Selection of binders

Adhesive is a material that fixes abrasive particles together and has a significant impact on the performance of grinding wheels.

Ceramic bonding agent: chemically stable, heat-resistant, corrosion-resistant, high porosity, high grinding efficiency, but brittle, suitable for grinding most materials.

Resin binder: high strength, certain elasticity, low heat resistance, good self sharpening, suitable for high-speed grinding and precision grinding.

Rubber bonding agent: It has a smooth grinding effect and is suitable for grinding operations that require high smoothness.

5.  Organization selection

Organization refers to the percentage of abrasive particles in the volume of a grinding wheel, which affects the grinding performance and durability of the wheel.

Tightly organized grinding wheel: suitable for precision grinding and form grinding to maintain the geometric shape of the grinding wheel and achieve good roughness.

Loose structured grinding wheel: suitable for rough grinding and grinding of softer metals to avoid wheel blockage.

6. Selection of Shape and Size

The shape and size of the grinding wheel should be selected according to the grinding conditions and the shape of the workpiece.

Common shapes: flat grinding wheel, single-sided concave grinding wheel, double-sided concave grinding wheel, thin film grinding wheel, cylindrical grinding wheel, bowl shaped grinding wheel, dish shaped grinding wheel, etc.

Size selection: Under possible conditions, the outer diameter of the grinding wheel should be selected as large as possible to improve the linear speed and productivity of the grinding wheel.

Jincheng Abrasives can help you choose the most suitable grinding wheel and provide you with customized services to ensure that you can improve efficiency in the work process.