Method for detecting cracking of weld seam of withdrawal and straightening machine

Abstract

The invention discloses a method for detecting cracking of a weld seam of a withdrawal and straightening machine. A grating detector is installed in the rear of a last correction roller in front of the withdrawal and straightening machine of a pickling and rolling combined unit to detect a steel strip, wherein an emitter of the grating detector emits light source signals, a receiver of the grating detector receives the light source signals, due to blocking of the steel plate (steel strip), the grating detector cannot sense the signals, the fact that the grating detector senses the signals shows that a weld seam cracking phenomenon of the steel plate arises, and an emergency stop signal is sent by the grating detector to a production line; and the receiver of the grating detector is in a shape of a long strip, and the emitter of the grating detector can move freely along a guiding rail. The invention aims to provide the method for detecting cracking of the weld seam of the withdrawal and straightening machine. By means of the method for detecting cracking of the weld seam of the withdrawal and straightening machine, the grating (grating detector) can detect weld seam situations of the steel plate in time, and whether or not the production line needs an emergency cut-off is judged according to the weld seam situations of the steel plate, so that the production efficiency is improved, and the accident time is shortened.

Description

technical field [0001] The invention relates to a method for detecting the open welding of the welding seam of a tension leveling machine. Background technique [0002] The pickling production line is a production line that converts hot-rolled raw materials into cold-rolled steel coils through transportation, decoiling, straightening, welding, tension leveling, pickling, edge trimming, rolling, and coiling. Its main technological process is that the hot-rolled coil is transported from the raw material storage to the cold-rolled cross-walking beam. Coil outer diameter measurement device, steel coil width detection device, and steel coil weighing station are arranged on the walking beam. After the steel coil outer diameter data is recorded, the coiling trolley can automatically position the hot-rolled coils to the uncoiler respectively. Corresponding mandrel height. A centering device is also arranged to correct the misalignment of the coil position. The centered steel coil...

AI Technical Summary

Problems solved by technology

Due to the particularity of the location of the tension leveler (before the pickling tank) and the effect of the tension leveler, the deformation of the weld is large, so when the quality of the weld is not good, it is easy to be damaged during the tension leveling process of the tension leveler. Weld breakage occurs

The steel strip runs in a continuous acid-rolling unit. Once the weld breaks, the steel strip loses tension instantly, which will cause a large impact on the equipment inside the tension leveler. In severe cases, the tension leveler will be knocked off, and the processing time Longer, affecting production rate

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