When setting up a Lathe part in Camworks, is it necessary to setup the \"Chuck\"

Question

When setting up a Lathe part in Camworks, is it necessary to setup the "Chuck" before extracting the features and operation for the part being machined No, it's not strictly necessary for creating features and operations. Yes, it's always a good idea to set up the chuck as a standard part of the setup routine and to define the all the chuck parameters BEFORE continuing with setting up the features and machining operations. It's a complete waste of time. CamWorks will still simulate the machining operations without having setup the Chuck parameters. Yes, it is necessary since CamWorks will NOT be able to correctly function until the Chuck has been fully defined. None of the above For 5 extra points, please state the two equations for calculating both RPM and Feed Rate and show an example using each equation.

Explanation / Answer

10) ans is option (d)

11) RPM in lathe (R)

RPM = (Cutting Speed x 4)/Diameter

RPM = Spindle Speed
Cutting Speed = Cutting Speed for the material being cut/worked.
Diameter = The Diameter of whatever is turning.

Example 1 Calculate RPM (Spindle Speed) for a 1/2 inch High-Speed-Steel 2 Flute End-Mill cutting Aluminum with a CS of 250 on a Milling Machine

RPM = (250 x 4)/.5 = 2000 RPM

Feed Rate = (Number of Cutting Teeth x RPM x Feed Per Tooth)

Example 2

Use the information and RPM calculated in Example 1 for a Milling Machine, ball-parking the FPT(Feed per Tooth) of .005 (see table), and a cutting depth of .050"

Feed Rate = (2 x 2000 x .005) = 20 inches/minute

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