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

Table 4

Optimization result of piercing efficiency and energy consumption.

Number

Decision variables

The mean of variables

Optimization results in the highest efficiency piercing

Optimization results in the lowest energy consumption

Unit

1

The rotational speed of roll at first stage

136.72

120.91

r/min

2

The percent reduction of roll at first stage

144.75

140.13

mm

3

The angle of inclination of roll at first stage

13.71

12.33

°

4

The position change range of pusher

2549.63

2547.32

mm

5

The actual position of mandrel thrust block

115.64

112.42

mm

6

The position of mandrel at first stage

279.32

279.43

mm

7

The temperature of tube blank at second stage

1286.23

1251.54

°C

8

The rotational speed of roll at second stage

171.82

154.43

°

9

The percent reduction of roll at second stage

144.86

142.75

mm

10

The angle of inclination of roll at second stage

13.47

12.49

°

11

The position of mandrel at second stage

280.56

277.78

mm

12

The rotational speed of guide disc at second stage

26.74

26.15

r/min

13

The rotational speed of roll at third stage

152.51

137.69

r/min

14

The percent reduction of roll at third stage

146.43

142.74

mm

15

The angle of inclination of roll at third stage

13.73

12.34

°

16

The position of mandrel at third stage

280.64

278.87

mm

17

The rotational speed of guide disc at third stage

28.65

26.78

r/min

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