Automatic Control Method of Second Surfacing Welding after Large Roller Shaft Wears

Abstract

The invention discloses an automatic double-overlaying control system and method for an abraded of a large roller shaft. A starting point and a terminal point of a welding point on the roller shaft are input into an input module and converted into digital signals which are transmitted to a programmable logic controller (PLC), a corresponding result is obtained through calculation by means of the PLC, and an executing signal is transmitted to a sliding module, an extending and retracting module, a polishing module, a gear module, an overlaying module, a flaw detection module and a heating module. By means of the control system and method, automatic overlaying of the abraded roller shaft is achieved, polishing, cleaning, welding, flaw detection and heating can be conducted on the abraded roller shaft automatically, and manpower resources are greatly saved; in addition, the accuracy and efficiency are high.

Description

Technical field [0001] The invention relates to the field of surfacing welding, in particular to an automatic control system and method for surfacing worn roller shafts. Background technique [0002] During the use of large rollers, due to the large changes in local strength, the rollers will wear out, chipped, cracks on the surface of the rollers, roller fractures, uneven hardness of the rollers and other damages, which will lead to scrapped rollers, especially in cold-rolled steel mills. Such phenomena often occur in continuous casting steel plants. Because the rollers are all made of special steel, and the special steel is manufactured through forging and complicated heat treatment process, the price is relatively high, the roller loss in the steel plant is huge every year, and then it cannot be repaired or cannot be reached after repairing. The original performance is scrapped, which causes significant economic losses to my country's metallurgical industry. [0003] The existi...

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Problems solved by technology

[0002] During the use of large-scale roll shafts, due to large local strength changes, the rolls will be damaged, such as wear, collapse, cracks on the surface of the roll, breakage of the roll, uneven hardness of the roll, etc., which will lead to the scrapping of the roll, especially in cold rolling mills. This phenomenon often occurs in continuous casting steel plants

Because the rollers are made of special steel, and the special steel is manufactured through forging and complex heat treatment process, the price is relatively high, and the annual loss of the rollers in the steel mill is huge, and then it cannot be repaired or cannot be repaired. It was scrapped because of its original performance, which caused great economic losses to my country's metallurgical industry.

[0003] Most of the existing welding is manually operated, which is prone to control errors leading to poor handling, and through manual judgment and control of the surfacing welding of the worn roller shaft, the technical requirements for the operator are high, the efficiency is low, and the accuracy is not high

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