Nur fatmawati
16611047
ZPA Flank evaluation using spherical stylus.
A coordinate measuring machine (CMM) is a device for measuring the
physical geometrical characteristics of an object.Machine may be manually
controlled by an operator or it may be computer controlled. Measurements are
defined by a probe attached to the third moving axis of this machine. Probes
may be mechanical, optical, laser, or white light, among others. A machine
which takes readings in six degrees of freedom and displays these readings in
mathematical form is known as a CMM. a
new worm type called ZPA (Pseudo-Archimedes’ Worm), generated with standard
cylindrical milling tools on NC lathe. Are showed the enveloping calculus for
determining the contact line between the tool and the flank of the worm –
considering cylindrical generating surfaces. Knowing the contact line, the
axial profile can be determined and implicit the flank of worm. Applying some
controlled corrections, this worm type can become a standard worm .
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