Method and device for improving quality of narrow lap welder weld joint

Abstract

The invention discloses a method and device for improving the quality of a narrow lap welder weld joint. The method comprises the steps that (1), automatic tracking of a temperature probe on the weldjoint is controlled; (2), the temperature detected by the temperature measuring probe is kept constant; and (3), online detection and evaluation are conducted on the quality of the weld joint. Onlinedetection and evaluation on the quality of the weld joint comprise the steps that the optimum temperature detected by the temperature measuring probe when welding is conducted is determined; a weldingexperiment is conducted on a substrate plate, an optimum quality information curve and a maximum defect tolerance quality curve are determined, and a quality curve database is built; and the qualityinformation curve is matched with a weld joint quality information curve detected in real time, if the similarity of the quality information curve (the optimum curve similarity) in the database and the weld joint quality information curve detected in real time is 80% or above, a display module displays 'qualified', and if the similarity of the quality information curve (the optimum curve similarity) in the database and the weld joint quality information curve detected in real time is 80% or below, the display module displays 'unqualified', and an alarming device conducts alarming reminding.

Description

Technical field: [0001] The invention relates to the technical field of metallurgical welding, in particular to a method and a device for improving the quality of weld seams of narrow lap welders in the welding technology of thin plate strip coil joints. Background technique [0002] In order to ensure the continuity of tinplate production, before the substrate enters the pickling process section, the forward strip and the subsequent strip need to be connected by welding. [0003] During the entire electroplating process, the substrate will repeatedly withstand bending under high tension after passing through the tension roller, and the welded seam connection will often be broken. The broken belt will cause damage to the work roll, and even cause the shutdown of the entire unit, reduce production efficiency, and cause great losses to the production of tinplate. [0004] Since the average thickness of the thin gauge of the tinplate is usually only about 0.15mm, the connectio...

AI Technical Summary

Problems solved by technology

[0016] In the welding process of the narrow lap welder, only the welding state variables (welding current, welding pressure) are monitored to estimate the weld quality, but the weld quality cannot be directly detected and evaluated, and the weld defects cannot be quickly detected online. design a set of systems and devices that can directly and accurately adjust and evaluate weld quality according to the actual situation on site

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