Abrasive and Non-Traditional Machining Flashcards
Abrasion
Irregularly shaped particles used to remove small amounts of material at a time
Uses for abrasive machining
finishing hard parts
shaping nonmetallic materials
cutting off lengths of bars
cleaning surfaces
removing defects, welds, edges
Friability
The ability for abrasive grain to fracture into small parts, self-sharpening characteristic
Relationship between grain size and friability
Larger grains = less friable
Lower grit = ___ grains
larger
Porosity
Gaps in between grains, helps provide cooling and clearance for chips
Grinding is done at ___ temperatures and ___ cutting speeds
high; high
Surface grinding
Grinds flat surfaces
Cylindrical grinding
Used for cylindrical shapes, can form shapes (such as threads) into grinding surface to transfer onto piece
Centerless grinding
Work is supported by a blade/roller instead of being fixed in place
Ultrasonic Machining
Removes material using sound waves
Suitable for hard/brittle materials
Chemical machining
Material removed/etched through chemical reactions
Electrochemical machining
Metal eroded using spark discharges from current conducting wires
Electrochemical grinding
Similar to electrochemical machining but grinding wheel is the electrode
Good for very hard materials
Laser beam machining
Material evaporated in small amounts using focused light beam
