An apparatus for improving the coiling quality of cold rolled material

Abstract

The utility model provides a device that improves the quality of cold rolling material curling, relates to the field of cold rolling, and comprises: a curling rubber sleeve, the curling rubber sleeve is divided into a hard area and a soft area; a diameter expansion mechanism is used for adjusting the curling inner diameter size in stages; wherein, the hardness of the soft area is less than or equal to 45, the hardness of the hard area is 70-80, and the diameter expansion mechanism executes a secondary diameter expansion program; the diameter is expanded to 608mm for the first time, and the diameter is expanded to 609-610mm for the second time after winding the steel plate two turns. The utility model greatly reduces the severity of defects, and the depth and influence range of the curling bruise defect after improvement are significantly reduced, and the surface quality of the finished product roll inner diameter is improved. The scrap rate is significantly reduced, and the scrap rate caused by curling bruise is reduced from 1.73% before improvement to 0.35% after improvement.

Description

Technical Field

[0001] This utility model relates to the field of cold rolling, and in particular to a device for improving the coiling quality of cold-rolled materials. Background Technology

[0002] In the production of cold-rolled strip steel, coiling is one of the key steps affecting the quality of the final product. As high-end manufacturing demands increasingly higher standards for the surface quality and dimensional accuracy of cold-rolled strip steel, customers are placing higher demands on the flatness and lack of damage to the inner diameter of the coil. However, in actual production, the inner diameter of the coil often suffers from defects such as indentations, scratches, or even localized deformation due to factors like interlayer friction, tension fluctuations, or equipment vibration. These defects not only affect the appearance of the steel coil but can also lead to material cracking or dimensional deviations during subsequent processing (such as uncoiling and stamping), causing batch quality degradation, increasing customer complaints and scrap volume, and directly impacting the company's yield and economic benefits.

[0003] Traditional solutions primarily rely on optimizing winding tension control or improving drum materials, but these methods struggle to completely eliminate direct contact friction between the rigid drum and the inner strip ring. To address this, the industry has explored flexible protection technologies. These involve adding highly wear-resistant rubber sleeves to the drum surface, utilizing their elastic cushioning effect to disperse localized pressure and reduce interlayer impacts. However, existing sleeve materials are prone to aging, lack sufficient temperature resistance, or slippage during high-speed winding, limiting their long-term stability.

[0004] Therefore, developing a novel rubber sleeve device that combines high elasticity, wear resistance, and creep resistance has become a key technological direction for improving the quality of cold-rolled coils and reducing inner diameter defects. Utility Model Content This invention provides a device for improving the coiling quality of cold-rolled materials. By improving the coiling sleeve, coiling procedure, and coiling method, it reduces the damage defects caused by coiling.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An apparatus for improving the coiling quality of cold-rolled materials, comprising: A rolled rubber sleeve, wherein the rolled rubber sleeve is divided into a hard area and a soft area; The diameter expansion mechanism is used to adjust the inner diameter of the coil in stages. The soft region has a Shore A hardness of less than or equal to 45, the hard region has a Shore A hardness of 70-80, and the expansion mechanism is configured to perform both initial and secondary expansion.

[0006] Furthermore, the soft area is located in the region where the rolled rubber sleeve contacts the steel strip head, and is used to counteract the compressive stress generated by the steel strip head and reduce the warping height of the steel strip head.

[0007] Furthermore, the target Shore A hardness value of the soft area of ​​the rolled rubber sleeve is 45, and the target Shore A hardness value of the hard area is 75.

[0008] Furthermore, the soft area is an annular strip-shaped region that covers the contact surface between the rolled rubber sleeve and the steel plate strip; the hard area is located on both sides of the soft area and is used to support the overall structural strength of the rolled rubber sleeve.

[0009] Furthermore, the curled rubber sleeve has a composite material structure, with the soft area made of low-hardness rubber and the hard area made of high-hardness rubber or metal-reinforced composite material.

[0010] Furthermore, the diameter-expanding mechanism initially expands the diameter to 608mm, and after winding the steel plate twice, it expands the diameter a second time to 609-610mm.

[0011] The beneficial effects of this utility model are as follows: Significantly reduces the length of curling and bruising defects. The severity of defects was significantly reduced. The depth and affected area of ​​curling and dent defects were significantly decreased after the improvement, improving the surface quality of the inner diameter of the finished roll. The scrap rate was significantly reduced, from 1.73% before the improvement to 0.35% after the improvement. Attached Figure Description

[0012] To more clearly illustrate the embodiments of this utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the device of this utility model.

[0014] Explanation of icon numbers: 1. Curled rubber sleeve; 101. Soft area; 102. Hard area. Detailed Implementation

[0015] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0018] This utility model provides a technical solution: a device for improving the coiling quality of cold-rolled materials, comprising: The rolled rubber sleeve 1 is divided into a hard area 102 and a soft area 101. The diameter expansion mechanism is used to adjust the inner diameter of the coil in stages. The soft region 101 has a Shore A hardness of less than or equal to 45, the hard region 102 has a Shore A hardness of 70-80, and the expansion mechanism is configured to perform both initial and secondary expansion.

[0019] The diameter was initially increased to 608mm, and after two turns of the steel plate, it was increased a second time to 609-610mm.

[0020] The soft zone 101 is located in the area where the coiled rubber sleeve 1 contacts the steel strip head, and is used to counteract the compressive stress generated by the steel strip head and reduce the warping height of the steel strip head.

[0021] The target Shore A hardness value of the soft area 101 of the coiled rubber sleeve 1 is 45, and the target Shore A hardness value of the hard area 102 is 75.

[0022] The soft zone 101 is an annular strip-shaped area that covers the contact surface between the rolled rubber sleeve 1 and the steel plate strip head; the hard zone 102 is located on both sides of the soft zone 101 and is used to support the overall structural strength of the rolled rubber sleeve 1.

[0023] The curled rubber sleeve 1 is a composite material structure. The soft area 101 is made of low-hardness rubber material, and the hard area 102 is made of high-hardness rubber or metal-reinforced composite material.

[0024] Hard Zone 102 Material: Nitrile rubber, neoprene rubber, Hypalon.

[0025] Soft zone 101 material: nitrile rubber, neoprene rubber.

[0026] The diameter-increasing mechanism initially increases the diameter to 608mm, and after winding the steel plate twice, it increases the diameter a second time to 609-610mm.

[0027] By reducing the material hardness of the contact area between the belt head and the curled rubber sleeve 1, the Shore A hardness of the soft area 101 is reduced to 45, which softens the rubber area at the belt head, offsets part of the compressive stress generated at the cut corner of the belt head, reduces the cut corner between the belt head and the rubber sleeve, and shortens the height of the belt head lifting, so as to reduce the outer ring curling damage defect at the belt head.

[0028] Meanwhile, by optimizing the coiling and diameter expansion method, the inner diameter of the disc is first expanded to 608mm, then two turns of steel plate are wound around it, and the inner diameter is expanded again to 610mm. This further increases the centripetal force on the lead head, thereby further reducing the chamfer angle between the lead head and the rubber sleeve, shortening the rise height of the lead head, and thus further reducing coiling damage defects. This diameter expansion mechanism uses existing control programs to complete the secondary diameter expansion based on predetermined data.

[0029] Example: The optimal parameters for the equipment are as follows: 1. Ensure that the Shore A hardness of the soft area 101 of the composite rubber sleeve is below 45, and the Shore A hardness of the hard area 102 is between 70 and 80, with a target value of 75; 2. The initial inner diameter for the diameter expansion was 608mm, and the diameter was expanded again to 610mm.

[0030] Table 1: Improvement of Curling Injuries

[0031] The curling and embossing defects have been significantly reduced, with the defect length shortened from about 100-200 meters to about 20-30 meters, and the degree of defects has also been greatly reduced.

[0032] Before the improvement of the curling and bruising defect, the scrap rate was 1.73%, and after the improvement, the scrap rate was 0.35%. The price difference between the good product and the scrap product was 2045 yuan / ton. The output of the second plant from January to September was about 1,092,272 tons. The shear contribution coefficient was 0.1. The profit from January to September was (1.73% - 0.35%). 1092272 2045 0.1=3.0825 million yuan.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An apparatus for improving the coiling quality of cold-rolled materials, characterized in that, include: The rolled rubber sleeve (1) is divided into a hard area and a soft area; The diameter expansion mechanism is used to adjust the inner diameter of the coil in stages; The soft region has a Shore A hardness of less than or equal to 45, the hard region has a Shore A hardness of 70-80, and the expansion mechanism is configured to perform both initial and secondary expansion.

2. The apparatus for improving the coiling quality of cold-rolled materials according to claim 1, characterized in that, The soft area (101) is located in the area where the rolled rubber sleeve (1) contacts the steel strip head, and is used to counteract the compressive stress generated by the steel strip head and reduce the warping height of the steel strip head.

3. The apparatus for improving the coiling quality of cold-rolled materials according to claim 1, characterized in that, The target Shore A hardness value of the soft area (101) of the coiled rubber sleeve (1) is 45, and the target Shore A hardness value of the hard area (102) is 75.

4. The apparatus for improving the coiling quality of cold-rolled materials according to claim 1, characterized in that, The soft area (101) is an annular strip area that covers the contact surface between the rolled rubber sleeve (1) and the steel plate strip; the hard area (102) is located on both sides of the soft area (101) and is used to support the overall structural strength of the rolled rubber sleeve (1).

5. The apparatus for improving the coiling quality of cold-rolled materials according to claim 1, characterized in that, The coiled rubber sleeve (1) is a composite material structure, with the soft area (101) made of low-hardness rubber material and the hard area (102) made of high-hardness rubber or metal-reinforced composite material.

6. The apparatus for improving the coiling quality of cold-rolled materials according to claim 1, characterized in that, The diameter is initially increased to 608mm, and after being wound around the steel plate twice, it is increased to 609-610mm a second time.

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