Precision Grinding (Leaving Cert Engineering): Flashcards
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Centreless grinding definition
Centreless grinding definition
Precision machining for high-quality finishes on cylindrical parts without centres or chuck
3 main components of centreless grinding
3 main components of centreless grinding
Grinding wheel, regulating wheel, work rest
Role of grinding wheel (G)
Role of grinding wheel (G)
Main cutting wheel that removes material from workpiece
Role of regulating wheel (R)
Role of regulating wheel (R)
Controls workpiece rotation & feed rate at low RPM
Role of work rest (B)
Role of work rest (B)
Vertical support holding workpiece between the two wheels
Speed of grinding wheel
Speed of grinding wheel
High speed
What regulating wheel controls
What regulating wheel controls
How the workpiece moves through the grinding zone
Example of tapered component made by centreless grinding
Example of tapered component made by centreless grinding
Morse tapers on larger drill bits
Benefit for components requiring no centre marks
Benefit for components requiring no centre marks
Ends remain unmarked since no centres are used
Main advantages of centreless grinding
Main advantages of centreless grinding
High-quality finishes & excellent dimensional accuracy
Use of magnetic chucks in centreless grinding
Use of magnetic chucks in centreless grinding
Additional workpiece support during grinding process
Purpose of wheel dressing
Purpose of wheel dressing
Removes worn abrasive particles, exposes fresh cutting edges
Purpose of wheel balancing
Purpose of wheel balancing
Eliminates vibrations that affect surface finish quality
Glazing in grinding wheels
Glazing in grinding wheels
When wheels become clogged with debris
Loading in grinding wheels
Loading in grinding wheels
When metal particles stick to the wheel surface