Full
Outline
Edge drop control accuracy is a key indicator that determines the core competitiveness of high-end cold-rolled products. Edge drop defects not only reduce product yield but also significantly deteriorate the downstream processing performance. Key edge drop control technologies and roll profile optimization for tandem cold rolling mills were investigated. The synergistic mechanisms among edge drop characteristics of hot-rolled raw materials, roll profile design, and roll shift control were comprehensively analyzed. A full-factor edge drop control solution covering raw material characteristics, roll profile design, and compensation control was formulated. Based on the working principle of the work roll shift device, the calculation methods for key parameters such as work roll shift position, shift amount, and shift insertion amount were derived. Based on the generation mechanism of edge drop, thickness attenuation characteristics at strip edges were analyzed by using measured data obtained from edge drop gauges. Edge attenuation coefficient models for each rolling pass were established, and the calculation methods for the edge compensation roll gap of each stand were further deduced. An auxiliary roll profile design method and a tandem mill edge drop prediction method were both developed on the basis of the edge drop characteristics of hot-rolled raw materials and the edge attenuation characteristics of rolled strip. Finally, auxiliary decision-making software for edge drop control and roll profile design was developed, which provided theoretical foundation and technical support for the process optimization of cold rolling edge drop control in cold rolling production.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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