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.
| 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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