Automatic hooking device of work roll changing machine and operating method thereof

Abstract

The invention belongs to a work roll system of a rolling mill, and in particular relates to an automatic hooking device of a work roll changing machine of rough and finish rolling main rolling mills of cold hot rolling and hot rolling slab production lines, and an operating method thereof. The device comprises a push-pull device fixing frame body, a roll changing hook and a hook. The device is characterized in that: the work roll system is provided with the hook of which the hook head top surface M is lower than the hook body top surface N; the work roll changing machine is provided with a moving frame body corresponding to the position of the hook; and the moving frame body is provided with a roll changing hook mechanism which consists of a resetting block, a positioning block, a hinged shaft, a compression spring, an arc surface sliding plate and a roll changing hook and is regulated and controlled by the compression spring. The device not only has reasonable design and compact structure and can complete work roll changing without external special driver energy, but also is simple and practical, and has the advantages of energy saving, low investment cost, reliable working, convenient maintenance, safe operation, convenient use and the like.

Description

technical field [0001] The invention belongs to the working roll system of a rolling mill, and in particular relates to an automatic hook device and an operation method of the working roll changing machine in the working roll changing machine of the rough rolling and finish rolling main rolling mills in the cold and hot rolling slab production lines. Background technique [0002] At present, the work roll changer in the cold and hot rolling mills of rolling slabs at home and abroad all adopts an automatic roll changer. The roll changer is composed of two parts: a traverse device and a push-pull device. Centering the frame window, the push-pull device is responsible for pushing the work roll system into and out of the frame window. When the push-pull device is pushed into the work roll system, the work roll system moves forward along a specific track to the working position and stops; the structure of the push-pull device is generally driven by a large-stroke push-pull hydrau...

AI Technical Summary

Problems solved by technology

According to the needs of the roll changing process, the hook-in and disengagement of the roll-changing hook must be carried out step by step according to the procedure. At present, the hook-in and disengagement of the roll-changing hook of this type of roll changer at home and abroad are generally carried out in three ways. , one is manually hooking in and out, that is, completely relying on manual operation to hook in and out the roll changing hook and the hook on the work roll system. Although the structure of this method is simple, the disadvantage is that it must be operated on site, and the degree of automation The second is semi-automatic hook-in and disengagement, that is, one of the two actions of hook-in or disengagement is completed by manual operation, and the other action is automatically completed by the equipment through a specific mechanism. This method is slightly improved compared with the first method, but The disadvantage is that the structure is more complicated than the first one, and a special action drive device is required; the third is automatic hook-in and disengagement. This method uses a hydraulic cylinder or an electro-hydraulic push rod to complete the hook-in and disengagement actions. The method has a high degree of automation and is now widely used. The disadvantage is that it is necessary to design more complicated mechanisms and mechanism actions to complete these two actions, and must have additional special driving devices and consume energy to complete the work, which makes the equipment structure more complicated. Greatly increased, equipment failure rate, post-maintenance difficulty, equipment cost and energy consumption all increased accordingly

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