A control method for threading thick steel strips with a thickness of 8 mm or more

Abstract

The present invention relates to the technical field of cold-rolled push-pull pickling lines, and specifically discloses a control method for threading thick-gauge strip steel with a thickness of more than 8 mm. The method comprises the following steps: 1) loading a steel coil onto a decoiler normally; 2) rotating the decoiler normally so that the strip head overlaps the top of a threading guide blade; 3) slowly inching the guide plate platform from 45° to 50°, maintaining the angle for 10-20 seconds, and then returning the guide plate platform to 45°; 4) threading the strip 30-50 cm by inching, and repeating step 3) until the strip steel is threaded in front of a steering roller; 5) inching the decoiler forward, with each inching not exceeding 1 / 4 of a turn of the steel coil, observing the condition of the steel coil, stopping the operation when a loose coil is found, and repeating steps 3)-5) until the steel coil passes through a No. 1 pinch roller group. The method effectively realizes the threading process of the thick-gauge strip steel, avoids surface quality defects caused by loose coils, is simple to control, does not require additional equipment modification, and can be completed without additional cost investment.

Description

Technical Field

[0001] The invention relates to the technical field of cold-rolled push-pull pickling lines, and in particular to a method for controlling the threading of thick-gauge strip steel with a thickness of more than 8 mm. Background Art

[0002] During pickling to produce thick-gauge products, the strip lacks a traction device and must be threaded to the production line's rolling line height before normal production can begin. During this process, due to the strip's thickness and high yield strength, the strip head sags, and the vertical height difference between the strip head and the production line's rolling line exceeds 30 cm. Relying solely on the uncoiler to drive the coil and raise the strip head to the production line's rolling line height, the strip head can become stuck under the steering roller, causing the coil to unwind and scratch the strip surface, failing to meet customer needs.

[0003] In summary, the difficulty in threading thick strip not only results in substandard product quality but also seriously impacts the efficiency and stability of pickling lines. Therefore, a method for threading thick strip with a thickness of 8 mm or greater is needed to address the current issues of low efficiency and poor stability in production for thick strips over 8 mm, ensuring the production of thick pickled products. Summary of the Invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a control method for threading thick-gauge strip steel with a thickness of more than 8 mm.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a control method for threading thick-gauge steel strips with a thickness of 8 mm or more, comprising the following steps:

[0006] 1) The steel coil is loaded onto the uncoiler normally;

[0007] 2) Rotate the uncoiler normally so that the strip head overlaps the top of the strip threading guide blade;

[0008] 3) Slowly lift the guide plate platform from 45° to 50°, hold for 10-20 seconds, and then return the guide plate platform to 45°;

[0009] 4) Thread the strip 30-50 cm in increments and repeat step 3) until the strip reaches the turning roller;

[0010] 5) Move the uncoiler forward in increments. Each increment should not exceed 1 / 4 of the coil. Observe the coil. If any loose coil is found, stop the operation and repeat steps 3) to 5) until the coil passes through the No. 1 pinch roller group.

[0011] Specifically, in step 1), the steel coil is rotated on the uncoiler so that the strip head is at the 12 o'clock position.

[0012] Specifically, the overlap between the belt head and the guide blade in step 2) is 30-50 cm.

[0013] The present invention has the following beneficial effects:

[0014] The invention designs a control method for threading thick steel strips with a thickness of 8 mm or more.

[0015] (1) Effectively realize the threading process of thick-gauge strip steel;

[0016] (2) Avoid surface quality defects caused by loose coiling;

[0017] (3) The control is simple and does not require additional equipment modification or other costs;

[0018] (4) The control logic of this method is clear and easy to implement, with strong applicability, and can be extended to other thick-gauge push-pull pickling units, etc. DETAILED DESCRIPTION

[0019] The following is a clear and complete further detailed description of the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] A control method for threading thick strip steel (8mm or thicker) is developed. Based on the characteristics of thick strip steel in the pickling uncoiler, the method primarily adjusts the strip head angle and the height of the guide plate platform at different positions to achieve a stable threading process. This method ensures the production of thick pickled products, thereby improving production efficiency.

[0021] The specific technical solutions are as follows:

[0022] 1. Load the steel coil to the uncoiler normally and rotate the steel coil so that the strip head is at the 12 o'clock position.

[0023] 2. Rotate the uncoiler normally so that the strip head overlaps above the blade of the threading guide, with the overlap between the strip head and the blade being 30-50cm.

[0024] 3. Slowly lift the guide plate platform from 45° to 50°, maintain it for 10-20 seconds, and then return the guide plate platform to 45°.

[0025] 4. Thread the strip 30-50 cm at a time and repeat step 3 until the strip is threaded in front of the turning roller.

[0026] 5. Move the uncoiler forward in increments. Each increment should not exceed 1 / 4 of the coil. Observe the coil. If any loose coil is found, stop the operation and repeat steps 3-5 until the coil passes through the No. 1 pinch roller group.

[0027] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware that any structural changes made under the guidance of the present invention, and any technical solutions that are the same or similar to those of the present invention, fall within the scope of protection of the present invention.

[0028] The technology, shape, and structure not described in detail in the present invention are all well-known technologies.

Claims

1. A method for controlling the threading of thick steel strips with a thickness of 8 mm or more, characterized in that: The following steps are involved: 1) The steel coil is normally loaded onto the uncoiler, and the coil is rotated on the uncoiler so that the coil head is at the 12 o'clock position; 2) Rotate the uncoiler normally so that the strip head overlaps the top of the strip threading guide blade; 3) Slowly lift the guide plate platform from 45° to 50°, hold for 10-20 seconds, and then return the guide plate platform to 45°; 4) Thread the strip 30-50 cm in increments and repeat step 3) until the strip reaches the turning roller; 5) Move the uncoiler forward in increments. Each increment should not exceed 1 / 4 of the coil. Observe the coil. If any loose coil is found, stop the operation and repeat steps 3) to 5) until the coil passes through the No. 1 pinch roller group.

2. The method for controlling the threading of thick-gauge steel strips with a thickness of 8 mm or more according to claim 1 is characterized in that: The overlap between the belt head and the guide blade in step 2) is 30-50 cm.