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Cutting-tool reliability assessment in
variable machining conditions
Huamin Liu
Makis,
V.
Toronto Univ.,
Ont.;
This paper appears
in: Reliability, IEEE Transactions on
Publication Date: Dec 1996
On page(s): 573-581
Volume: 45, Issue:
4
ISSN:
0018-9529
References Cited:
35
CODEN: IERQAD
Abstract:
It is a common industrial practice to use the
same cutting tool for different operations and on different part
types to minimize cutting-tool change-overs and the number of
cutting-tools required, and to increase part-routing flexibility.
This paper derives a recursive formula to calculate the cutting-tool
reliability in variable conditions if the failure-time distribution
of the cutting-tool can be represented by the accelerated failure
time model (AFTM). The formulae for the cutting-tool reliability
when the processing time for each operation is random are also
derived. The unknown parameters in the reliability function can be
estimated from cutting-tool life-data obtained under either fixed
conditions or variable conditions by using the method of maximum
likelihood. Two examples based on real cutting-tool life-data
demonstrate the computational results
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