Rough rolling vertical roller mill

Abstract

The invention relates to a vertical mill for rough rolling, for which, a main transmission combined speed reducer is an integral structure, the output axles of which are two output gear axles arranged vertically; a main transmission motor is connected with the main transmission combined speed reducer through a coupling; the two output gear axles extending vertically under the main transmission combined speed reducer are connected with a cross cardan axis, a sleeve at the low end of the cross cardan axis is connected with a roller flat a roller mechanism arranged on a guide rail seat; the two sides of the roller mechanism are connected with a side holddown device, for which DC motor drives a gear and a transmission nut structure; a hydraulic roll-changing lifter is arranged on a frame under the main transmission combined speed reducer, and a roll-changing shift-out mechanism is arranged on the side of the guide rail seat. The invention has the advantages that the transmission rigidity and the service life are improved, and the transmission requirements of large torque can be met; the quick roll changing can be realized, the online roll changing time is greatly shortened, and the productivity is improved; being combined with a flat rolling machine, the invention can produce blanks with different specifications and decrease the processing cost.

Description

technical field [0001] The invention belongs to the technical field of steel rolling machinery and equipment, and in particular relates to a rough rolling vertical roll mill suitable for blank rolling in the rough rolling area of ​​a medium and wide band hot rolling production line. Background technique [0002] At present, the rough rolling mills commonly used in medium and wide band hot rolling production lines are usually 700-800 flat roll mills, because only flat roll mills are used, and there is no vertical roll mill. According to different billets, different specifications of finished products must be rolled. The corresponding pass type is prepared to adapt to the billet used and to prepare suitable profiles for the subsequent rolling process. Therefore, with the change of the finished product specifications of the medium and wide bands, it is necessary to constantly replace the rolls of different pass types. The shortcoming of above-mentioned rolling mill is: 1, need ...

AI Technical Summary

Problems solved by technology

The disadvantages of the above-mentioned rolling mill are: 1. It is necessary to prepare a lot of rolls suitable for various specifications and passes, even if some specifications are used in a small amount, they must be prepared, which will inevitably cause a waste of funds for rolling rolls.

2. The roll change in the existing rolling mill equipment is online roll change, and each roll change takes a lot of time, so the entire production line needs to be shut down, which greatly reduces the production efficiency

3. To realize flat roll reciprocating rolling, it must be equipped with auxiliary equipment such as a swing table, which increases the one-time equipment investment in the rough rolling area

4. The main drive reducer in the existing rolling mill adopts a split bevel gearbox structure, and the two bevel gearboxes are fixed by a pressure plate and connected by splines in the middle, so the overall rigidity of the transmission is poor and cannot meet the requirements of large torque transmission

5. The side pressing device of the rolling mill adopts a manual adjustment structure, and its disadvantages: a. Manual adjustment is manual adjustment of the roll surface, so the adjustment speed is slow

b. Manual adjustment can only adjust the roll gap in the shutdown state, and the roll gap will not change in the production state, so the strip pressure cannot be realized

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