Machining Terms Flashcards
Continuous chip
gives good surface finish and steady cutting forces, but may be undesirable for automated machinery
Discontinuous chip
is desirable for chip removal, but cutting forces may fluctuate, affecting surface finish and causing chatter
Built-up-edge (BUE) chip
generally results in poor surface finish, but a thin stable edge can protect tool surfaces
Turning
reduction of diameter along axis of work, can produce straight, conical, curved or grooved surfaces
Facing
produces a flat surface at the end of the part and perpendicular to its axis
Boring
turning on internal surface, used to enlarge a hole or cylindrical cavity
Parting
(cutting off) used to cut off a section from the end of the part
Threading
produces internal or external threads along the parts axis
Knurling
produces a regularly shaped roughness (indentations)on cylindrical surfaces, as in knob or handles
Reaming
used to make an existing hole dimensionally more accurate than can be achieved by drilling alone
Chuck
holds the workpiece securely to the spindle of the lathe (can be done with collet
Headstock:
is fixed to the bed and houses the motors, pulleys, belts, etc.
Common tools:
parting tool, single-point cutting tool (left-hand, right-hand, threading), knurling tool, boring bar, etc.
Carriage:
slides along the ways is an assembly of the cross-slide, tool post and apron
Tool post:
used to secure the cutting tool to the lathe, and adjust its position and orientation
