Roller-bottom type normalizing furnace bottom-roller changing method

Abstract

The invention discloses a roller-bottom type normalizing furnace bottom-roller changing method, which adopts a method of coaxially arranging new and old bottom rollers of a furnace, maintaining balance to hoist and rotating by 180 degrees for transposition; the method is simple and convenient to be operate, directly rotates the new bottom roller of the furnace to the position of the bottom roller of the furnace needed to be changed, and does not need to dismount the body of the furnace; therefore, the roller-bottom type normalizing furnace bottom-roller changing method can implement changing under the situation of maintaining the temperature inside the furnace and does not need to raise the temperature again, thus being capable of saving the product cost and improving the production efficiency. As the complex hoisting out and hoisting in processes are not needed, the changing time for the bottom roller of the furnace can be greatly shortened, which only needs about 6 hours, thereby being capable of ensuring the normal running of production to the largest extent, saving the manpower and material resources for changing the bottom roller of the furnace and improving the working efficiency for changing the roller.

Description

technical field [0001] The invention relates to a method for maintaining a roller hearth normalizing furnace, in particular to a method for replacing bottom rollers of a roller hearth normalizing furnace. Background technique [0002] The normalizing furnace is equipment used for heat treatment of steel plates. It is usually installed at the back of the medium and heavy plate production line to continuously heat treat steel plates. It is an important equipment for medium and heavy plate factories to produce high-quality and thick steel plates. The normalizing furnace is divided into two types according to the transmission mode: roller hearth type and stepping type. The bottom of the roller hearth type normalizing furnace is equipped with hearth rollers, and the assembly line operation of the plate is completed by driving the hearth rollers. Damaged hearth rollers will affect the quality of the plate. Normal transmission will adversely affect the steel plate heat treatment of...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the replacement of hearth rolls needs to be disassembled and brought out, and new hearth rolls need to be replaced and hoisted into new hearth rolls. Therefore, the furnace body needs to be dismantled adaptively, and the replacement of hearth rolls often takes at least 5 days. , which seriously affects the normal production, wastes manpower, material resources and time. Since the furnace body is dismantled, the temperature inside the furnace cannot be kept warm, which wastes production costs and reduces production efficiency.

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