Ch 22 Corrected
Terms in this set (32)
Is attached to the front of the carriage; has the controls for providing manual and powered motion for the carriage and powered motion for the cross slide.
A term that is applied to a lathe that is semiautomatic and makes simultaneous cuts using "massed" tooling, but does not use screw machine or turret principles. The tools are fed and retracted automatically by means of cam controlled mechanisms.
Base and backbone of the lathe; usually made of well-normalized or aged gray or nodular cast iron and provides a heavy, rigid frame on which all the other basic components are mounted.
A variation of turning; internal turning; uses a single point cutting tool to produce internal cylindrical or conical surfaces.
A relatively flat H-shaped casting which rides on the outer set of ways on the bed; provides means for mounting and moving the cutting tools
Are adjustable over a considerable size range and have radial steel fingers; used to hold straight shank drills
Used to hold smooth cold-rolled bar stock or machined work pieces more accurately than with regular chucks; are relatively thin tubular steel bushings that are split into three longitudinal segments over about two-thirds of their length.
If a tool is fed all the way to the axis of the work piece, it will be cut in two this is called parting or cutoff
The most critical part of a machining system
Depth of Cut
The distance that the cutting tool is plunged into the workpiece. Depth of cut is typically measured in millimeters or fractions of an inch.
The process of drilling creates two chips; can be done on lathes with the drill mounted in the tailstock quill of engine lathes or the turret on turret lathes and fed against a rotating work piece.
Most frequently used in manufacturing; essential components are the bed, headstock assembly, tailstock assembly, carriage assembly, quick-change gearbox, the lead-screw, and feed rod.
Used to support irregularly shaped work that cannot be gripped easily in chucks or collets.
The producing of a flat surface as the result of the tool being fed across the end of the rotating work piece.
The feed per tooth defines the average uncut chip thickness t and influences the magnitude of the cutting force.
Provide means for supporting work; this is bolted to the lathe carriage; it has two contact fingers that are adjusted to bear against the work piece, opposite the cutting tool, in order to prevent the work from being deflected away from the cutting tool by the cutting forces
Provides powered means to rotate the work at various rpm values;
Produces a regularly shaped, roughened surface on a work piece
Aka cutting tools are held in the quill.
Work pieces that must be on both ends or are disked-shaped are often mounted on mandrels
Metal Removal Rate
The volume of metal removed by the time needed to remove it.
A basic machining process by which a surface is generated by progressive chip removal.
Is the operation by which one section of a work piece is severed from the remainder by means of a cutoff tool
The component on the mill that moves the spindle in and out of the power head.
Removes a small amount of material from the surface of holes
All screw machines are fully automated, whether mechanically (via cams) or by CNC (computerized control). Most of the time, they do not produce screws.
Can be used in place of the tailstock as a means of supporting the end of long pieces; provides means of supporting work piece and is clamped to the lathe
Consists of three parts lower casting, upper casting, and tailstock quill.
Occurs if the tool if fed at an angle to the axis of rotation an external conical surface results
The process of machining external cylindrical and conical surfaces
Basically, a longitudinally feedable, hexagon turret replaces the tailstock.
Carried by the spindle on the lathe.