What are the differences in grinding methods for Milling Cutter Sharpeners made of different materials?

Differences in Grinding Methods for Milling Cutter Sharpeners Made of Different Materials

1. Grinding Process for Carbide Tools

Milling Cutter Sharpeners are finely ground using diamond or cubic boron nitride (CBN) grinding wheels to ensure the microscopic cleanliness of the cutting edge.

Feed speed and depth of cut must be controlled during grinding to prevent thermal cracking and maintain the tool's high hardness.

Sufficient coolant circulation is essential to reduce grinding temperature and prevent thermal deformation of the carbide surface.

2. Grinding Process for High-Speed ​​Steel (HSS) Tools

Alumina or silicon carbide grinding wheels are commonly used. The grinding angle is relatively loose, facilitating rapid material removal.

Grinding parameters (such as feed rate and speed) can be appropriately increased to improve machining efficiency.

Coolant usage remains important, but temperature control requirements are slightly lower than for carbide.

3. Grinding Process for Ceramic Cutting Tools

Use diamond grinding wheels for low-speed, light-load grinding to prevent cracking in the brittle ceramic material.

Intermittent cooling is required during grinding to avoid continuous high temperatures that could degrade the ceramic structure.

The grinding path should employ multiple light contacts to ensure accurate restoration of the cutting edge shape.

4. Grinding Process for Coated Cutting Tools (e.g., TiN, TiAlN)

First, use fine-grit diamond grinding wheels to remove the worn layer, then use even finer grinding wheels to restore the cutting edge geometry.

Grinding force must be controlled during grinding to prevent coating peeling or damage to the substrate.

An appropriate amount of rust inhibitor can be added to the coolant to protect the coating surface from corrosion.

When do Milling Cutter Sharpeners need to be re-sharpened?

1. Significant deviation in cutting edge geometry

Re-sharpening is required when the cutting angle, rake angle, or clearance angle of the tool deviates from the design values, resulting in increased dimensional errors.

2. Wear or chipping on the cutting edge

Significant wear, chipping, or other defects on the cutting edge weaken its sharpness, necessitating resharpening.

3. Deterioration in machined surface quality

Scratches, burrs, or increased roughness on the finished workpiece surface indicate insufficient tool sharpness, requiring resharpening to restore machining accuracy.

4. Tool usage time or machining volume reaches preset thresholds

According to the manufacturer's or factory's maintenance plan, tools should be preventively sharpened after accumulating a certain number of parts machined or a certain number of machining hours, even without significant wear, to ensure continued machining efficiency.