2-D
Way of displaying real-world objects on a flat surface, showing only height and width. This system uses only the X and Y axes.
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Glossary Terms
power hacksawing
Sawing process that uses the back-and-forth motion of a short, straight-toothed blade to cut the workpiece. Hacksawing machines are general…
precision machining (precision measurement)
Machining and measuring to exacting standards. Four basic considerations are: dimensions, or geometrical characteristics such as lengths, a…
preheating
Heating before some further thermal or mechanical treatment.
probability theory
Discipline based on the likelihood of any given event happening; mathematical techniques built around sampling methods, combinations and pe…
process annealing
Imprecise term denoting various treatments used to improve workability. For the term to be meaningful, the condition of the material and th…
process control
Method of monitoring a process. Relates to electronic hardware and instrumentation used in automated process control. See in-process gaging…
productivity
Measure of the efficiency with which human and material resources are used to produce goods and services. Output per man-hour has tradition…
profiling
Machining vertical edges of workpieces having irregular contours; normally performed with an endmill in a vertical spindle on a milling mac…
physical vapor deposition (PVD)
Tool-coating process performed at low temperature (500° C), compared to chemical vapor deposition (1,000° C). Employs electric field to gen…
quality assurance (quality control)
Terms denoting a formal program for monitoring product quality. The denotations are the same, but QC typically connotes a more traditional …
quench cracking
Fracture of a metal during quenching. Most frequently observed in hardened carbon steel, alloy steel or tool steel parts of high hardness a…