1. What is the Structure Number of Wheel?

The Structure Number of Wheel denotes the density or spacing of the abrasive grains and the bond material in the wheel. The lower the structure number, the denser the wheel.

2. How Does the Calculator Work?

The calculator uses the Structure Number formula:

Where:

• \( SN \) — Structure Number of Wheel
• \( Vb \) — Percentage Volume of Bond Material in Grinding (%)
• \( Hn \) — Wheel Hardness Number of Grinding

Explanation: The equation calculates the structure number based on the percentage volume of bond material and wheel hardness number, determining the density and spacing of abrasive grains in the grinding wheel.

3. Importance of Structure Number Calculation

Details: Accurate structure number calculation is crucial for selecting the appropriate grinding wheel for specific applications, ensuring optimal performance and material removal rates.

4. Using the Calculator

Tips: Enter percentage volume of bond material (Vb) in % and wheel hardness number (Hn). All values must be valid (non-negative numbers).

5. Frequently Asked Questions (FAQ)

Q1: What does a lower structure number indicate?
A: A lower structure number indicates a denser wheel with closer spacing between abrasive grains.

Q2: How does bond material volume affect wheel performance?
A: Higher bond material volume typically results in a stronger, more durable wheel but may reduce cutting efficiency.

Q3: What is the typical range for structure numbers?
A: Structure numbers typically range from 0 to 20, with lower numbers indicating denser structures.

Q4: How does wheel hardness affect grinding operations?
A: Harder wheels retain abrasive grains longer but may generate more heat, while softer wheels wear faster but maintain cutting efficiency.

Q5: When should specific structure numbers be used?
A: Denser wheels (lower structure numbers) are typically used for precision grinding, while more open structures (higher numbers) are used for rough grinding operations.