Method for feeding strip provided with seam into furnace and air cushion furnace

Abstract

The invention discloses a method for feeding a strip provided with a seam into a furnace. The method for feeding the strip provided with the seam into the furnace comprises the steps that the position of the seam is detected, when it is detected that the position of the seam is located at an inlet of the air cushion furnace, the tension in the air cushion furnace is reduced to be within the safe tension value range, and when the seam enters the air cushion furnace, the phenomenon that the strip is broken because of bearing excessively large tension in the furnace, so that continuous production cannot be conducted is avoided; before the seam reaches scrubbing rollers, the scrubbing rollers are controlled to be open, before the seam reaches squeeze rollers, the squeeze rollers are controlled to be open, and the phenomenon that when the seam passes through the scrubbing rollers and the squeeze rollers, because the seam is ragged and collides with the scrubbing rollers and the squeeze rollers, the scrubbing rollers or the squeezing rollers are damaged is avoided; and before the seam reaches a three-roller straightening machine, the rolling reduction of the three-roller straightening machine is reduced, the drawing and straightening tension of the three-roller straightening machine is reduced, and the phenomenon that the strip is broken is avoided. Therefore, the production efficiency is effectively improved.

Description

Technical field [0001] The present invention relates to the technical field of heat treatment, in particular to a method for entering a strip with a seam opening and an air cushion furnace. Background technique [0002] The air-cushion furnace is an important equipment for continuous heat treatment of strips. For the continuity of heat treatment, the strips need to be connected by stitching. Due to the unevenness of the stitching opening, it cannot bear too much when the strip enters the furnace and in the furnace. Otherwise, it is easy to cause the belt to break and the production cannot continue; when the strip is out of the furnace, if the reduction of the three-roll straightening machine at the outlet of the air cushion furnace is not reduced, reducing the tension and elongation will also cause the strip The phenomenon of strip breaking occurs. In addition, if the cleaning roller and squeeze roller at the exit are not opened in time, the uneven strip seam will contact the cle...

AI Technical Summary

Problems solved by technology

[0002] The air cushion furnace is an important equipment for continuous heat treatment of strips. For the continuity of heat treatment, the strips need to be connected by sutures. Because of the unevenness of the sutures, the strips cannot bear too much when they enter the furnace and in the furnace. Otherwise, it is easy to cause strip breakage, and the production cannot continue; when the strip is out of the furnace, if the reduction of the three-roll leveler at the exit of the air cushion furnace is not reduced, reducing its tension or elongation will also cause stripping. In addition, if the cleaning roller and squeezing roller at the exit are not opened in time, the uneven seam of the strip will contact the cleaning roller and squeezing roller, which will cause damage to the cleaning roller and squeezing roller. damage

[0003] Therefore, during the process of the seam of the strip from entering the furnace to being released from the furnace, the production personnel need to carefully observe the position of the seam, and when the seam of the strip enters the furnace, it is necessary to reduce the tension in the furnace in time; When the seam is out of the furnace, it is necessary to open the cleaning roller and squeeze roller in time to reduce the reduction of the three-roll leveler and reduce its tension or elongation. If the production personnel do not observe the position of the seam of the strip accurately , the tension in the furnace is not reduced in time, the reduction amount of the three-roll leveler is reduced, and the tension or elongation of the straightening machine is reduced, which may cause a broken belt accident; if the cleaning roller and squeeze roller are not opened in time, it may Risk of damage to cleaning and squeeze rollers

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