Multistage cluster plate mill

Abstract

Disclosed is a multistage cluster plate mill (1) formed by facing cluster constructions (10). The cluster constructions (10) are provided with auxiliary roller axle boxes (12), central auxiliary roller axle boxes (13), beams (16), first rolling devices (19) and second rolling devices (20). The roller axle boxes (12) jointly support the first rollers (5) and second rollers (6). The central auxiliary roller axle boxes (13) are equipped independently from the auxiliary roller axle boxes (12) and support the central auxiliary roller (7). The beams (16) support the central auxiliary roller axle boxes (13), and are slideable in opposite directions together with the central auxiliary axle boxes (13). The first rolling devices (19) support the beams (16), and also slide the beams (16) and roll the central auxiliary roller axle boxes (13) in a vertical direction. The second rolling devices (20) support the auxiliary roller axle boxes (12) equipped in the beams (16) and also allow the auxiliary roller axle boxes (12) which are independent of the central auxiliary roller axle boxes (13) to slide and roll in a vertical direction.

Description

technical field [0001] The invention relates to a multi-stage roll group plate rolling mill. [0002] this application claims priority based on Japanese Patent Application No. 2010-042433 for which it applied to Japan on February 26, 2010, and uses the content here. Background technique [0003] As a plate rolling mill for rolling workpieces, a multi-stage roll group plate rolling mill described in Patent Document 1 below is known. [0004] This multi-stage roll group plate rolling mill is configured as follows: a back-up roll headbox which commonly supports the first back-up roll and the second back-up roll is provided, and a center back-up roll headbox which pivotally supports the center back-up roll is enclosed. This simplifies the structure and operation of the machine and reduces the burden of maintenance work. In this multi-stage roller group plate rolling mill, a special pressing device for the central backup roll is built in the back-up roll chock box, which can ap...

AI Technical Summary

Problems solved by technology

[0006] However, the central backup roll of the above configuration is supported in such a way that the support load passes through the support roll shaft box that pivotally supports the first and second backup rolls, so it is not possible to enlarge the shaft box for the central backup roll or the dedicated shaft box for the central backup roll. Press down device

Therefore, the strength and output load of the center backup roll can only be reduced, and the load applied to the center backup roll alone cannot be increased.

In addition, since the first and second support rollers are directly subjected to fluctuations in the downforce of the central support axle box, the fluctuation of the support rollers caused by external disturbances becomes large.

In addition, the back-up roll box is surrounded by the center back-up roll box, so when removing work such as roll grinding, the wiring of the pressing device for the center back-up roll built in the back-up roll box must also be removed. Under the circumstances, the work becomes complicated

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