Griding

Question 1

What is abrasive machining primarily used for?

Answer 1

To achieve superior surface finishes and high dimensional accuracy, especially for hard or brittle materials.

Abrasive machining is essential in industries requiring precise specifications.

Question 2

Name three common abrasive machining processes.

Answer 2

• Grinding
• Honing
• Lapping

These processes are widely utilized in manufacturing for different applications.

Question 3

What is the primary material removal mechanism in abrasive machining?

Answer 3

Interaction of abrasive grains with the workpiece at high cutting speeds and shallow penetration depths.

This mechanism is crucial for achieving desired surface finishes.

Question 4

What distinguishes creep-feed grinding from traditional grinding?

Answer 4

Creep-feed grinding uses single deep passes with slower feed rates to remove more material in a shorter time.

This method is particularly effective for complex geometries.

Question 5

What is the primary purpose of honing?

Answer 5

To improve geometry, readjust alignment, and achieve finer surface finishes.

Honing is often used for achieving precise dimensions.

Question 6

What characteristic pattern does superfinishing leave on a workpiece?

Answer 6

A crosshatch pattern with very low surface roughness.

This pattern aids in reducing friction and wear.

Question 7

What is lapping used for?

Answer 7

To achieve extremely flat surfaces and tight tolerances using a fluid suspension of abrasive particles.

Lapping is often used in optical applications and precision machinery.

Question 8

What materials are commonly used as abrasive grains?

Answer 8

• Diamond
• Silicon carbide
• Aluminium oxide

These materials are selected based on the application and desired finish.

Question 9

Which process involves rotating and oscillating motions to refine internal bores?

Answer 9

Honing.

This process enhances the surface finish and dimensional accuracy of internal features.

Question 10

What is the typical range of grit sizes for polishing?

Answer 10

20–120.

Grit size impacts the surface finish achieved in polishing processes.

Question 11

How does superfinishing improve part performance?

Answer 11

• Reducing wear
• Improving sealing capabilities
• Achieving predictable surface finishes

These enhancements are critical in high-performance applications.

Question 12

What is the RA measurement in surface finishing?

Answer 12

It indicates the surface roughness of a workpiece.

RA values are used to quantify surface texture.

Question 13

What is centerless grinding commonly used for?

Answer 13

Grinding cylindrical surfaces without the need for a fixture.

This method is advantageous for high-volume production.

Question 14

What process involves a fluid with abrasive particles to achieve extreme accuracy and smoothness?

Answer 14

Lapping.

Lapping is essential for applications requiring high precision.

Question 15

What are the key characteristics of creep-feed grinding?

Answer 15

• High material removal rates
• Deep cuts
• Increased productivity with continuous cutting

These characteristics make it suitable for complex part geometries.