Ch. 22 Machining Operations and Tools
22.4 Name the various ways in which a workpart can be held in a lathe
1) between centers (2) chuck (3) collet (4) face plate
22.6 How does a turret lathe differ from an engine lathe
A turret lathe has a toolholding turret in place of a tailstock; the tools in the turret can be brought to work to perform multiple cutting operations on the work without the need to change tools as in operating a conventional engine lathe
22.1 Distinguish between generating and forming when machining workpart geometries
Generating refers to the creation of work geometry due to the feed trajectory of the cutting tool; examples include straight turning, taper turning, and profile milling. Forming involves the creation of work geometry due to the shape of the cutting tool; common examples include form turning and drilling.
22.9 How do shaping and planing differ
In shaping, the work is stationary during the cut, and the speed motion is performed by the cutting tool planing, the cutting tool is stationary, and the workpart is moved past the tool in the speed motion
22.8 Describe the difference between up milling and down milling
In up milling, the cutter speed direction is opposite the feed direction; in down milling, the direction of cutter rotation is the same as the feed direction
22.2 Describe the turning process.
Turning is a machining process in which a single-point tool removes material from the surface of a rotating cylindrical workpiece, the tool being fed in a direction parallel to the axis of work rotation
22.13 A broaching operation is best described by which one of the following: (a) a rotating tool moves past a stationary workpart, (b) a tool with multiple teeth moves linearly past a stationary workpart, (c) a workpart is fed past a rotating cutting tool, or (d) a workpart moves linearly past a stationary single-point tool?
a tool with multiple teeth moves linearly past a stationary workpart
22.12 A planing operation is best described by which one of the following: (a) a single-point tool moves linearly past a stationary workpart, (b) a tool with multiple teeth moves linearly past a stationary workpart, (c) a workpart is fed linearly past a rotating cutting tool, or (d) a workpart moves linearly past a single-point tool
a workpart moves linearly past a single-point tool
22.1 A lathe can be used to perform which of the following machining operations (three correct answers): (a) boring, (b) broaching, (c) drilling, (d) milling, (e) planing, and (f) turning?
boring, drilling, & turning
22.2 Which one of the following cutting tools cannot be used on a turret lathe: (a) broach, (b) cutoff tool, (c) drill bit, (d) single-point turning tool, or (e) threading tool?
broach
22.11 The basic milling machine is which one of the following: (a) bed type, (b) knee and column, (c) profiling mill, (d) ram mill, or (e) universal milling machine
knee & column
22.7 What is the difference between peripheral milling and face milling
peripheral milling, cutting is accomplished by the peripheral teeth of the milling cutter and the tool axis is parallel to the work surface; in face milling, cutting is accomplished by the flat face of the cutter whose axis is perpendicular to the work surface.
22.5 What is the difference between a live center and a dead center, when these terms are used in the context of workholding in a lathe
A center holds the work during rotation at the tailstock end of the lathe. A live center is mounted in bearings and rotates with the work, while a dead center does not rotate the work rotates about it
22.3 How does a boring operation differ from a turning operation
Boring produces an internal cylindrical shape from an existing hole turning produces an external cylindrical shape
