Grinding

Question 1

What common wears are there?

Answer 1

Attritious wear (the grits get flat)
Grit fracture, they break
Bond fracture, they get loosened

Question 2

What is the force ratios dependant on?

Answer 2

Wheel sharpness
Grinding fluid
Grinding aggressiveness

Question 3

what are the functions of the bonds

Answer 3

Retain abrasive grain during the process.
Wear at a controlled rate with respect to grain wear
Resist centrifugal forces especially in highspeed grindingR
Readily expose the grain to the work where possible.

Question 4

What is the most important aspect of surface intregrity for grinding?

Answer 4

Thermal damage, affects the quality and limits the production rate

Question 5

What types of thermal damage can occur?

Answer 5

Thermal softening:occurws att 560C, causes the ground surface to soften.
Residual tensile stresses: WHen thermal expansion gives high stress, can cause cracking close to the surface
Rehardening burn, at austentizing temp(1125C) causes a brittle layer that may ,lead to cracking.