Table 1 Parameters and description in machining model A
Parameters | Description (Unit) |
|---|---|
T p | Unit machining time (min) |
Ï€ | Mathematical constant (3.1415) |
C p | Unit machining cost per product ($) |
R a | Roughness of the finished surface (µm) |
MRR | Material removal rate (mm3/min) |
T s | Tool setup time (min) |
T c | Tool change time (min) |
T i | Tool non-cutting time (min) |
C t | Tool cost ($) |
C I | Labor cost ($/min) |
C o | Overhead cost ($/min) |
K F , K n , k, x 1, x 2, x 3 | Constants relevant to a specific tool–work piece |
K T , α 1, α 2, α 3, β 1, β 2, β 3 | Positive constant parameters |
V | Volume of the removed metal (mm3) |
η | Mechanical efficiency of the machine (%) |
v min , v max | Boundary of cutting speed (m/min) |
f min , f max | Boundary of feed rate (mm/rev) |
a min , a max | Boundary of depth of cut (mm) |
F max , P max | Maximum cutting force (N) and cutting power (kw) |