Mathematical Problems in Engineering / 2014 / Article / Tab 4

Research Article

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.

NumberDecision variablesThe mean of variablesOptimization results in the highest efficiency piercingOptimization results in the lowest energy consumptionUnit

1 The rotational speed of roll at first stage136.72120.91r/min
2 The percent reduction of roll at first stage144.75140.13mm
3 The angle of inclination of roll at first stage13.7112.33°
4 The position change range of pusher2549.632547.32mm
5 The actual position of mandrel thrust block115.64112.42mm
6 The position of mandrel at first stage279.32279.43mm
7 The temperature of tube blank at second stage1286.231251.54 °C
8 The rotational speed of roll at second stage171.82154.43°
9 The percent reduction of roll at second stage144.86142.75mm
10 The angle of inclination of roll at second stage13.4712.49°
11 The position of mandrel at second stage280.56277.78 mm
12 The rotational speed of guide disc at second stage26.7426.15r/min
13 The rotational speed of roll at third stage152.51137.69 r/min
14 The percent reduction of roll at third stage146.43142.74mm
15 The angle of inclination of roll at third stage13.7312.34°
16 The position of mandrel at third stage280.64 278.87 mm
17 The rotational speed of guide disc at third stage28.6526.78r/min

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