Working roll replacing device and working roll replacing method for heavy and medium plate mill

Abstract

The invention discloses a working roll replacing device for a heavy and medium plate mill. The device comprises two roll replacing trollies, a transverse guide rail arranged outside one side of a mill stander vertically to a central line of the mill, a pair of hydraulic cylinders arranged at the two ends of the transverse guide rail and two cross travelling trollies which can move along the transverse guide rail and are connected to the pair of hydraulic cylinders respectively, wherein the two cross travelling trollies are also provided with a longitudinal guide rail in parallel with the central line of the mill respectively; and the two roll replacing trollies are arranged on the pair of cross travelling trollies respectively and can move along the longitudinal guide rail. The invention also discloses a working roll replacing method for the heavy and medium plate mill, which is executed in the working roll replacing device for the heaving and medium plate mill. The technical scheme of the working roll replacing device and the working roll replacing method for the heavy and medium plate mill of the invention can shorten the roll replacing time of a working roll and achieve high automatic degree so as to fulfill the aim of indirectly improving the production capacity of a unit.

Description

technical field [0001] The invention relates to a matching equipment used in a medium and thick plate rolling mill, in particular to a work roll changing device and a roll changing method for a medium and heavy plate rolling mill. Background technique [0002] After the rolls of the rolling mill are produced for a period of time, their surface roughness will decrease, which will affect the surface finish of the strip and reduce the quality of the rolled strip. Therefore, the rolls need to be replaced regularly. The traditional method of changing rolls is manual and driving. Cooperating, it is realized by pushing and pulling the rolls to be changed. This method of changing rolls is not only time-consuming and laborious, it often takes several hours to replace a roll, and it is very unsafe. The work roll changing device is mainly used to replace the work roll assembly. Most of the roll changing devices currently used are in the form of a single roll changing trolley, that is,...

AI Technical Summary

Problems solved by technology

The main disadvantage of this type of roll changing device is that the replacement time is long and the degree of automation is low, so that the main rolling mill is in a state of waiting for the old work rolls to be hoisted away by the crane and then the new work rolls are assembled, which affects the working efficiency of the unit

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