Rolling mill work roll shifting device and safety bolt component thereof

Abstract

The invention discloses a rolling mill work roll shifting device, which comprises a shifting hydraulic cylinder and a shifting move component, wherein one end of the shifting hydraulic cylinder is fixed on a frame of a rolling mill; a piston rod extends out of the other end of the shifting hydraulic cylinder; the shifting move component can clamp the end part of a bearing block, and can slidingly sleeved on the outer wall of the shifting hydraulic cylinder; the piston rod is connected with the shifting move component through a detachable safety bolt component; and the safety bolt component is provided with at least one easy rupture part. When the axial force applied to the safety bolt component is larger than preset load, the easy rupture part is ruptured to release the axial force so as to protect the shifting device. The invention also provides a safety bolt component used for the rolling mill work roll shifting device.

Description

technical field [0001] The invention relates to a large-scale steel rolling equipment in the field of metallurgical machinery, in particular to a rolling mill work roll shifting device and a safety bolt assembly thereof. Background technique [0002] At present, various means and methods are used in the existing strip mills to improve the roll gap convexity and control the strip shape, among which the roll shifting technology is a widely used control method. In the existing rolling mill, there are upper work rolls and lower work rolls, one end of the upper and lower work rolls is installed in the frame (archway) window on the drive side of the rolling mill through the transmission side bearing seat, and the other end is installed through the operation side bearing seat. Installed in the frame window on the operating side of the rolling mill, the bearing seat on the operating side and the bearing seat on the driving side can move axially relative to the frame. On the operati...

AI Technical Summary

Problems solved by technology

If the axial force is transmitted to the transmission side of the rolling mill, it may damage the transmission system and have an adverse effect on the connecting shaft or the motor; if the axial force is transmitted to the operating side of the rolling mill, due to the limited stroke of the roll shifting hydraulic cylinder, When the stroke margin is used up, the axial force cannot be unloaded, so that the roll shifting device bears an excessive axial load, which may easily cause damage to the roll shifting device, and even lead to serious production accidents

When the roll shifting device breaks down, it is difficult to disassemble and assemble, and there are many devices that need to be disassembled, and the time for disassembly and installation is relatively long

[0009] 2. There are usually two pallet hydraulic drive devices in the existing roll shifting device, so the equipment cost is high, the piping structure is complicated, and the maintenance cost is high

[0010] 3. Since in the existing roll shifting device, the installation groove of the pallet is located on the center line LL' of the pallet, one end of the anti-rotation part of the existing roll shifting device is installed on the center line LL' of the pallet, The rotation arm of the anti-rotation part is shorter, so that the working section size of the anti-rotation part is increased

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