Download ch35Metrology_1 PDF

Titlech35Metrology_1
TagsInterferometry Engineering Tolerance Natural Philosophy Equipment Tools
File Size3.0 MB
Total Pages20
Document Text Contents
Page 1

Kalpakjian • Schmid
Manufacturing Engineering and
Technology

© 2001 Prentice-Hall Page 35-1

CHAPTER 35

Engineering Metrology and
Instrumentation

Page 2

Kalpakjian • Schmid
Manufacturing Engineering and
Technology

© 2001 Prentice-Hall Page 35-2

Slide-way Cross-Section
Figure 35.1 Cross-section of
a machine tool slide-way.
The width, depth, angles, and
other dimensions must be
produced and measured
accurately for the machine
tool to function as expected.

Page 10

Kalpakjian • Schmid
Manufacturing Engineering and
Technology

© 2001 Prentice-Hall Page 35-10

Interferometry

Figure 35.11 (a) Interferometry
method for measuring flatness
using an optical flat. (b)
Fringes on a flat inclined
surface. An optical flat resting
on a perfectly flat workpiece
surface will not split the light
beam, and no fringes will be
present. (c) Fringes on a
surface with two inclinations.
Note: the greater the incline, the
closer the fringes. (d) Curved
fringe patterns indicate
curvatures on the workpiece
surface. (e) Fringe pattern
indicating a scratch on the
surface.

Page 11

Kalpakjian • Schmid
Manufacturing Engineering and
Technology

© 2001 Prentice-Hall Page 35-11

Measuring Roundness

Figure 35.12 (a) Schematic illustration of “out of roundness” (exaggerated). Measuring roundness
using (b) V-block and dial indicator, (c) part supported on centers and rotated, and (d) circular
tracing, with part being rotated on a vertical axis. Source: After F. T. Farago.

Page 19

Kalpakjian • Schmid
Manufacturing Engineering and
Technology

© 2001 Prentice-Hall Page 35-19

Tolerances and Surface Roughnesses

Figure 35.23 Tolerances and
surface roughness obtained
in various manufacturing
processes. These tolerances
apply to a 25-mm (1-in.)
work-piece dimension.
Source: J. A. Schey.

Page 20

Kalpakjian • Schmid
Manufacturing Engineering and
Technology

© 2001 Prentice-Hall Page 35-20

Engineering Symbols
Figure 35.24 Geometric characteristic symbols to be indicated on engineering drawings of parts to be
manufactured. Source: The American Society of Mechanical Engineers.

Similer Documents