High-intensity strip steel coil threading method

Abstract

The invention relates to the field of strip steel rolling and particularly relates to a strip steel coil threading method. The high-intensity strip steel coil threading method comprises the following steps: a first grating at the inlet of a pre-leveler is first opened, and a second grating at the outlet of the pre-leveler, a third grating at the outlet of a finish-leveler, and a fourth grating at the inlet of a pinch roll are closed; the head of the strip steel is led to pass though a threading device manually, is conveyed to the pre-leveler to be straightened, is conveyed to the finish-leveler by a cutting head to be straightened, and then is led to pass through the pinch roll; and then an automatic control device is opened, the second grating, the third grating and the fourth grating are opened in sequence, a normal threading procedure is started, and the head of the strip steel passes through a looping pit and a lateral guide device and then is conveyed to a rolling mill to be rolled. According to the high-intensity strip steel coil threading method provided by the invention, the head of the strip steel is conveyed to the pinch roll manually, and then the automatic control device is started; the method is applicable to high-intensity steel coil with the thickness of more than 2.5 mm; and since the method is adopted, the phenomenon of bounce and unwinding of the steel coil never occurs since the method is adopted, so that the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of strip steel rolling, in particular to a method for threading a strip steel coil. Background technique [0002] Strip steel is rolled into steel coils before processing for the convenience of transportation, and the steel coils must be threaded before entering the production line; figure 1 As shown, the process before strip rolling is as follows: after the steel coil is uncoiled on the uncoiler 2, the head of the strip 1 first passes through the strip threading device 3, and then is sent to the primary straightening machine 4 for straightening, and after straightening, it is straightened by the cutting head The cutting head is sent to the finishing machine 6 for straightening, and then the pinch roller 7 enters the looper pit 8, and finally is sent to the rolling machine 10 by the side guide device 9 for rolling; the existing normal belt threading is After the head of the strip steel is sent to the entrance of the ...

AI Technical Summary

Problems solved by technology

[0002] Strip steel is rolled into steel coils for transportation convenience before processing, and steel coils must be threaded before entering the production line; figure 1 As shown, the process before strip rolling is as follows: after the steel coil is uncoiled on the uncoiler 2, the head of the strip 1 first passes through the strip threading device 3, and then is sent to the primary straightening machine 4 for straightening, and after straightening, it is straightened by the cutting head The cutting head is sent to the finishing machine 6 for straightening, and then the pinch roller 7 enters the looper pit 8, and finally is sent to the rolling machine 10 by the side guide device 9 for rolling; the existing normal belt threading is After the head of the strip steel is sent to the entrance of the preliminary straightening machine 4 manually, the automatic control device carries out fully automatic normal steel strip feeding. Equipped with a grating, the automatic control device determines the position of the strip head through the signal sent by the grating to control the feeding; because the distance between the uncoiler 2 and the entrance of the primary straightening machine 4 is relatively short, only the strip threading device 3 presses the plate when feeding When producing high-thickness and high-strength strip steel, the strip threading device 3 is often unable to hold down the strip steel, which may easily cause the steel coil to rebound and scatter during the automatic feeding process

The thickness of the steel coil that can be processed by the blanking line is 0.6 mm to 3.5 mm. When the thickness of the produced steel coil reaches 3.0 mm, the yield strength reaches 800 MPa. Because the thickness of the steel plate is too thick and the yield strength is too strong, the steel coil is easy to wear when threading the strip. Bounce back and disperse, and the disperse steel coil generally needs to be processed for about 2 hours, which is not only a waste of time, but also may cause injury to personnel and equipment during the processing

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