Method for automatically monitoring welding contraction deformation of steel structure

Abstract

The invention discloses a method for automatically monitoring welding contraction deformation of a steel structure. An inventor conducts theoretical deviation through a displacement sensor to obtain contraction deformation computational formulas seen from formula (1) to formula (6) and sets up the automatic monitoring method according to the formulas. The method is simple in device, easy to operate, high in automation degree, free of manual interference and capable of lowering the labor intensity of people. Contraction deformation values in two perpendicular directions and a total contraction deformation value can be displayed in real time, and real-time grasping of stability and quality of the welding technology can be facilitated. The monitoring result is higher in accuracy compared with the monitoring result obtained through a conventional method, and the accuracy can reach 0.01mm. When the method is applied to the steel structure welding field, the contraction deformation can be accurately, automatically and dynamically monitored in real time, reliability and stability of the welding technology can be conveniently distinguished, and the requirements of the steel structure for the forming size, the appearance and the bearing capacity are beneficially met.

Description

technical field [0001] The invention belongs to the technical field of steel structure welding processing, and in particular relates to an automatic monitoring method for steel structure welding shrinkage deformation. Background technique [0002] Steel structures are divided into building steel structures, bridge steel structures, etc. Compared with the reinforced concrete structures commonly used in the field of civil engineering, steel structures have the advantages of high strength, low engineering cost, light weight, short construction period and factory production, etc. Multiple advantages have been widely valued and developed rapidly. In addition to the use of major projects and landmark buildings, steel structures have been widely used, and the entire industry has shown a prosperous scene. [0003] With the development of contemporary industry, the application of welded structures has also been developed by leaps and bounds. In the production of welded structures, th...

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Problems solved by technology

[0004] As a common residual deformation in welding, steel structure welding shrinkage deformation has been continuously concerned and extensively studied. Traditional welding shrinkage deformation measurement mainly relies on manual measurement, such as steel ruler (vernier caliper) measurement, three-dimensional coordinate observation method, And it has to be measured when the weldment is cooled to room temperature. The labor efficiency is low and the construction period is delayed, and the precision is also low. The shrinkage and deformation results cannot be displayed in real time during the welding process, and it cannot be fully automated.

In recent years, digital camera numerical image processing method has appeared to measure shrinkage and deformation. The measurement accuracy of digital camera numerical image processing method is related to the pixels of the camera, but the requirements for equipment and software are high, the price is high, and it is not suitable for popularization. Therefore, in steel A high-precision, automatic, real-time dynamic monitoring method for welding shrinkage deformation is urgently needed in the field of structural welding processing

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