Improved strip steel weld joint mark hole detection device of cold rolling and pickling combined unit

Abstract

The invention discloses an improved strip steel weld joint mark hole detection device of a cold rolling and pickling combined unit. A first emitter and a first grating emitter are sequentially installed on the operation side of a main emitter from inside to outside, a first receiver and a first grating receiver are sequentially installed on the operation side of a main receiver from inside to outside, the first emitter corresponds to the first receiver and the first grating emitter corresponds to the first grating receiver; a second emitter and a second grating emitter are sequentially installed on the transmission side of the main emitter from inside to outside, a second receiver and a second grating receiver are sequentially installed on the transmission side of the main receiver from inside to outside, the second emitter corresponds to the second receiver and the second grating emitter corresponds to the second grating receiver. According to the device, a combination of two gratings and three weld joint mark hole detectors is adopted, effective detection areas are increased, the problem caused by the fact that one weld joint mark hole detector is directly adopted is solved, it is guaranteed that strip steel weld joint mark holes can be accurately detected no matter how strip steel deviates, accidents of overlarge thickness differences or strip breakage or the like due to the fact that the strip steel weld joint mark holes move away from the effective detection areas of the weld joint mark hole detectors are eliminated, and normal production of the cold rolling and pickling combined unit and a continuous annealing unit is guaranteed.

Description

technical field [0001] The invention relates to a strip steel detecting device, which is suitable for detecting the weld mark hole of the strip steel in the combined cold-rolling and acid-rolling unit, in particular to an improved detection device for the weld mark hole in the strip steel of the combined cold-rolling and acid-rolling unit. Background technique [0002] The strip weld mark hole detection device of the combined cold rolling and acid rolling unit is an important detection equipment for cold rolling, in which the weld mark hole detector is composed of a transmitter and a receiver, and is installed on the looper of the combined cold rolling and acid rolling unit. exit. In order to ensure the continuous rolling of the combined acid-rolling unit, the welding machine in the entrance area of ​​the combined acid-rolling unit welds the head of the next strip to the tail of the previous strip, and punches a 20mm diameter hole at the weld. marked hole. Before the weld...

AI Technical Summary

Problems solved by technology

However, in the actual production of the acid-rolling combined unit, due to the equipment and the strip steel, the strip steel will deviate during the conveying process. Although the deviation correcting device will correct the deviation of the strip steel, there will still be a phenomenon of strip steel deviation. When the strip steel weld mark hole moves out of the detection area with a width of 220mm or 308mm set by the weld mark hole detector, the weld mark hole detector cannot detect the strip steel weld mark hole, such as figure 2 shown

like figure 2 After the strip steel deviates by 120mm, the 20mm diameter marking hole K punched in the middle of the width direction of the strip steel 3 is moved horizontally by L=120mm synchronously relative to the longitudinal center line of the weld marking hole detector, and moved out of the weld marking hole detector setting The fixed width H is the detection area of ​​220mm. The weld mark hole detector cannot detect the mark hole K of the strip 3 weld. Open the roll gap, and then cause the thickness deviation of the strip 3 in the weld area to be too large, and in severe cases, the strip 3 will be broken. As a result, the weld seam is wrapped into the produced steel coil. When the steel coil is annealed in the continuous annealing unit, the weld seam in the steel coil may be broken in the furnace, causing the continuous annealing furnace strip 3 to break and stop. furnace accident

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