Palmgren TU 2506, Руководство по эксплуатации

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Page 52
TU2506
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TU2807V US
4.18.2 Recommended Feed Rate Selection in Inches Per Revolution for Turning
While the recommended feed rates found in these charts represent good fundamental machin-
ing practice, they are only recommended values. Deviations from these values may be neces-
sary due to certain circumstances, such as long, small diameter workpieces. The feed rate
used on small diameter workpieces may need to be reduced. The work-holding technique has a
great deal to do with the feed rate selection. Setups, which lack rigidity, may require a slower
feed rate. The distance that the unsupported part sticks out of the work-holding mechanism
must be kept to a minimum to assure proper rigidity. The required workpiece finish will also
affect the feed rate selection. Finer finish requirement will require a slower feed rate selection.
When using carbide-turning tools, the available horsepower and the rigidity of the spindle bear-
ings could influence the feed rate as well.
Material
High-Speed Steel Carbide
Roughing Finishing Roughing Finishing
Low Carbon Steel 0.010 to 0.020 0.002 to 0.008 0.008 to 0.035 0.006 to 0.010
Med. Carbon Steel 0.008 to 0.018 0.002 to 0.008 0.008 to 0.030 0.006 to 0.010
High Carbon Steel 0.008 to 0.015 0.002 to 0.008 0.008 to 0.030 0.006 to 0.010
Cast Iron 0.010 to 0.025 0.003 to 0.010 0.010 to 0.040 0.008 to 0.012
Bronze 0.015 to 0.025 0.003 to 0.010 0.010 to 0.040 0.008 to 0.012
Aluminum 0.015 to 0.030 0.003 to 0.012 0.015 to 0.045 0.008 to 0.012