Modeling and Optimization for Piercing Efficiency and Energy Consumption Based on Mean Value Substaged KELM-PLS and GA Method

Table 2

Decision making variable table of optimization.

Number	Variables	Decision variables of piercing efficiency	Decision variables of piercing energy consumption	The mean of variables
1	𝑥1	√	√	The rotational speed of roll at first stage
2	𝑥2	√	√	The percent reduction of roll at first stage
3	𝑥3	√	√	The angle of inclination of roll at first stage
4	𝑥4	√		The position change range of pusher
5	𝑥5	√		The actual position of mandrel thrust block
6	𝑥6	√		The position of mandrel at first stage
7	𝑥7	√	√	The temperature of tube blank at second stage
8	𝑥8	√	√	The rotational speed of roll at second stage
9	𝑥9	√	√	The percent reduction of roll at second stage
10	𝑥10	√	√	The angle of inclination of roll at second stage
11	𝑥11	√		The position of mandrel at second stage
12	𝑥12	√	√	The rotational speed of guide disc at second stage
13	𝑥13	√	√	The rotational speed of roll at third stage
14	𝑥14	√	√	The percent reduction of roll at third stage
15	𝑥15	√	√	The angle of inclination of roll at third stage
16	𝑥16	√		The position of mandrel at third stage
17	𝑥17	√	√	The rotational speed of guide disc at third stage