Two-roller rolling machine manual roller replacing device and roller replacing method

Abstract

The invention discloses a two-roller rolling machine manual roller replacing device and a roller replacing method. A roller replacing frame, a lifting device and a spiral rotation push-pull device areincluded. The lifting device is arranged on the roller replacing frame. A part of a walking track of the lifting device stretches out of the roller replacing frame. A threaded rod of the spiral rotation push-pull device is in threaded connection with the roller replacing frame. Compared with the prior art, the two-roller rolling machine manual roller replacing device has the beneficial effects that the two-roller rolling machine manual roller replacing device is a purely-manual mechanical roller replacing device, a crane does not need to be used in the roller pushing-pulling process, electricand large hydraulic facilities and other electrified facilities are avoided, the operation safety coefficient is high, the equipment weight is small, the occupied area is small, the structure is simple and easy to control, the maintenance and repairing cost and the equipment fault rate are very low, the roller replacing efficiency is basically equal to the roller replacing efficiency of an automatic roller replacing trolley, a large amount of labor does not need to be occupied, and two workers can finish the roller replacing operation.

Description

technical field [0001] The invention relates to a roll changing car for a rolling mill, in particular to a manual roll changing device and a roll changing method for a two-roll rolling mill. Background technique [0002] The two-high rolling mill is mainly used as rolling experimental equipment for low-carbon steel and non-ferrous metal plates, and is widely used in the research and development of rolling processes and properties of rolled pieces in various laboratories. During the rolling process, wear and tear will inevitably occur on the surface of the roll, and serious defects such as roll surface scratches, roll surface cracks, and roll surface scratches will occur. New rolling rolls need to be replaced in time to avoid affecting the rolled slab. quality. [0003] There are two commonly used methods for changing rolls in two-roll mills: the first is to rely on cranes and manpower to replace rolls; the second is to use special automatic roll changers, mainly including m...

AI Technical Summary

Problems solved by technology

The first type of roll change method relies entirely on cranes and manpower operations. When changing rolls, it is necessary to use a crane to hang the roll surface of the lower roll, and the crane slowly drives the upper and lower rolls to move gradually until the small wheels of the lower roll rest on the temporary construction outside the rolling mill frame. Then use manpower to pull the roll out from the mill stand. In order to prevent the roll from tilting and collapsing and causing safety accidents, the crane needs to hang the lower roll all the time during the process of pulling out the old roll and loading the new roll, and along with it For the movement of the roll, the crane needs to change the hoisting position frequently, which requires the crane to perform repeated lifting and slowing operations. When the crane falls, there is no constraint on both sides of the roll, and the roll is prone to tilting and tilting. Therefore, this roll changing method It is very dangerous, and the rolls are pushed and pulled by manpower, and the roll change efficiency is very low. It takes at least 5-6 hours to change a roll, and at least three people are required to change a roll, and the labor cost is also high.

The second roll changing method adopts automatic roll changing. Although the roll changing speed is fast and saves most of the manpower cost, the equipment structure is complicated due to the use of electric or hydraulic automatic roll changing driving methods, resulting in equipment size. Larger, and the manufacturing cost and later maintenance and repair costs are also very high

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