Aluminum product single-stand tension control method

Abstract

The invention discloses a single-stand tension control method for aluminum products. The method comprises the following steps: S1, acquiring historical rolling data of different aluminum products; s2, acquiring unit tension adjusting quantities of different aluminum products according to the types of the aluminum products; s3, establishing a single-stand tension model; and S4, single-stand tension is calculated according to the specification of the aluminum product and the single-stand tension model, and the aluminum product is rolled according to the single-stand tension. The tension is controlled when the aluminum product is rolled, so that the rolling process is carried out stably, the yield of a unit is improved, the strip breakage condition is reduced, and the stability of the quality of the aluminum product is ensured.

Description

Technical Field

[0001] The invention belongs to the field of aluminum product rolling and relates to a single-frame tension control method for aluminum products. Background Art

[0002] At present, a single-stand rolling mill is widely used in aluminum product manufacturing enterprises during the aluminum rolling process. This rolling mill is a single-pass rolling mill, and the product tensile strength is single, and the tension control during the rolling process is unique. It is not possible to use different tension controls according to material properties to improve the product tensile properties. If the tension calculation during the rolling process is not accurate enough, manual intervention is required.

[0003] In actual production, there are fluctuations in the aluminum strength of incoming strips of the same aluminum grade and specification. This fluctuation will cause deviations in the tension setting values ​​of different strips. Therefore, tension and rolling resonance occurs during the rolling process, causing the rolling mill to tremble, aluminum products to have thickness differences, and strip breakage to occur easily, making it impossible to produce stable quality products. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a single-frame tension control method for aluminum products, which controls the tension during the rolling of aluminum products so that the rolling process proceeds smoothly, thereby improving the rolling rate of the unit, reducing the occurrence of strip breaks, and ensuring the stability of the quality of aluminum products.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] The present invention provides a single-frame tension control method for aluminum products, comprising the following steps:

[0007] S1, obtain historical rolling data of different aluminum products;

[0008] S2, obtaining the unit tension adjustment amount of different aluminum products according to the type of aluminum products;

[0009] S3, establish a single rack tension model;

[0010] S4, calculating the single-stand tension according to the current aluminum product specifications and the single-stand tension model, and rolling the aluminum product according to the single-stand tension.

[0011] Preferably, in step S1, the historical rolling data of different aluminum products include aluminum product type, aluminum grade type, inlet material thickness, inlet material width, product thickness, product width and single-frame unit tension setting value.

[0012] Preferably, the single-rack unit tension setting value includes a rack entrance unit tension and a rack exit unit tension.

[0013] Preferably, in step S2, the unit tension adjustment amounts of the different aluminum products are as follows:

[0014] When the aluminum product is a non-annealed product, the unit tension adjustment amount is 0 to 0.2 kg / mm 2 ;

[0015] When the aluminum product is an annealed product, the unit tension adjustment amount is 0 to 0.8 kg / mm 2 ;

[0016] When the aluminum product is to be annealed, the unit tension adjustment amount is -0.9 to 0.1 kg / mm 2 .

[0017] Preferably, in step S3, the single-frame tension model is calculated as follows:

[0018] Tset=(T i +C ni )*W*T

[0019] Among them, Tset is the single-frame tension;

[0020] T i , C ni are the single-frame unit tension setting value and unit tension adjustment value of the i-th aluminum product respectively; i is 0 to 2, rounded up; n is 1 or 2;

[0021] W is the material width;

[0022] T is the material thickness.

[0023] Preferably, in step S4, the single rack tension includes rack inlet tension and rack outlet tension;

[0024] The calculation formula of the rack entrance tension is as follows:

[0025] Tset0=(Tent+C 1i )*W 1 *T 1

[0026] Among them, Tset0 is the rack entrance tension; Tent is the single rack entrance unit tension; C 1i is the unit tension adjustment of the i-th aluminum product entrance; W 1 is the inlet material thickness; T 1 is the inlet material width; i ranges from 0 to 2 and is rounded up;

[0027] The calculation formula of the rack outlet tension is as follows:

[0028] Tset1=(Text+C2i )*W 2 *T 2

[0029] Among them, Tset1 is the rack outlet tension; Text is the single rack outlet unit tension; C 2i is the export unit tension adjustment value of the i-th aluminum product; W 2 is the target thickness of the product; T 2 is the target width of the product; i ranges from 0 to 2 and is rounded.

[0030] The single-frame tension control method for aluminum products provided by the present invention has the following beneficial effects:

[0031] 1. The single-frame tension control method for aluminum products of the present invention uses different tensions to roll aluminum strips according to different materials, thereby improving the properties of the materials and improving the quality stability of aluminum products;

[0032] 2. The single-frame tension control method for aluminum products of the present invention can make the rolling process proceed smoothly, reduce the waste of raw materials, reduce the occurrence of broken strips, improve the unit yield rate, ensure the stability of aluminum product quality, and improve enterprise benefits;

[0033] 3. The present invention uses different tension controls for different aluminum products, the same aluminum type and the same specification. It improves the flexibility, material tightness, yield strength and tensile strength of different aluminum products, provides a solid foundation for the long-term research and development innovation of new materials and new products, improves the accuracy of model control, continuously improves the quality of high-value-added aluminum products, improves the automatic efficiency of the unit, and improves the benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0035] Figure 1 It is a flow chart of the single-frame tension control method for aluminum products of the present invention;

[0036] Figure 2 A schematic structural diagram of a single-stand aluminum rolling mill used in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with embodiments.

[0038] Combination Figure 1As shown, the present invention provides a single-frame tension control method for aluminum products. According to the aluminum type, inlet material specifications and target specifications in the original data of the incoming materials, the inlet unit tension and the outlet unit tension are combined, and then the inlet unit tension adjustment amount and the outlet unit tension adjustment amount are given according to the aluminum type and aluminum product type in the original data of the incoming materials, and finally the inlet tension and outlet tension setting values ​​are calculated by a calculation formula. The present invention specifically includes the following steps:

[0039] S1, obtain historical rolling data of different aluminum products;

[0040] In this step, the historical rolling data of different aluminum products include aluminum product type, aluminum grade type, inlet material thickness, inlet material width, product thickness, product width and single-frame unit tension setting value.

[0041] In the historical rolling data of different aluminum products, the unit tension setting value of a single rack is determined according to the type of aluminum. The unit tension setting value of a single rack includes the rack entrance unit tension and the rack exit unit tension. Specifically, the aluminum type, entrance material thickness, and target thickness in the original data of the incoming material must correspond to the aluminum type, entrance material thickness, and target thickness in the historical rolling data to give the entrance unit tension and exit unit tension.

[0042] S2, obtaining the unit tension adjustment amount of different aluminum products according to the type of aluminum products;

[0043] In this step, the aluminum product types are divided according to the annealing conditions, specifically into non-annealed products, annealed products and products ready for annealing. Different aluminum product types require corresponding different unit tension adjustment amounts, as follows:

[0044] When the aluminum product is a non-annealed product, the corresponding unit tension adjustment amount C 0 0~0.2kg / mm 2 ;

[0045] When the aluminum product is an annealed product, the corresponding unit tension adjustment amount C 1 0~0.8kg / mm 2 ;

[0046] When the aluminum product is to be annealed, the corresponding unit tension adjustment amount C 2 -0.9~0.1kg / mm 2 .

[0047] S3, establish a single rack tension model;

[0048] Considering that product type, aluminum type, product specifications, etc. all have an impact on the tension of a single rack, for example, different aluminum product types, the same aluminum type, and the same specification of materials have different single rack tensions. Similarly, different aluminum types, the same product type, and the same specification of materials have different single rack tensions. Therefore, a single rack tension model is established based on the data obtained in steps S1 and S2, and the specific calculation is as follows:

[0049] Tset=(T i +C ni )*W*T

[0050] Where Tset is the tension of a single rack; T i , C ni are the single rack unit tension setting value and unit tension adjustment value of the i-th aluminum product respectively; n is 1 or 2, n = 1 is defined as the rack entrance, n = 2 is defined as the rack exit; i is 0 to 2, rounded; C ni For example, Cn 0 is the unit tension adjustment of the unannealed product, C n1 is the unit tension adjustment of the annealed product, C n2 It is the unit tension adjustment for preparing the product for annealing; W is the material width; T is the material thickness.

[0051] In the above-mentioned single-stand tension model, the specific requirements for the single-stand tension are as follows: (1) The aluminum type, inlet material thickness, and target thickness in the original incoming material data must correspond to the aluminum type, inlet material thickness, and target thickness in the historical rolling data, and the inlet unit tension and outlet unit tension are given. (2) The corresponding inlet unit tension adjustment amount and outlet unit tension adjustment amount are given according to the aluminum type and aluminum product type in the original incoming material data. (3) The inlet and outlet tension setting values ​​are calculated in combination with the calculation formula.

[0052] S4, calculating the single-stand tension according to the current aluminum product specifications and the single-stand tension model, and rolling the aluminum product according to the single-stand tension.

[0053] Considering that the single-rack tension control is divided into rack entrance tension and rack exit tension control, the single-rack tension model calculation including rack entrance tension and rack exit tension is established in step S3 in combination with the current aluminum product specifications:

[0054] The calculation formula for the rack inlet tension is as follows:

[0055] Tset0=(Tent+C 1i )*W 1 *T 1

[0056] Among them, Tset0 is the rack entrance tension; Tent is the single rack entrance unit tension; C 1i is the unit tension adjustment of the i-th aluminum product entrance; W 1 is the inlet material thickness; T 1 is the inlet material width;

[0057] The calculation formula of the rack outlet tension is as follows:

[0058] Tset1=(Text+C 2i )*W 2 *T 2

[0059] Among them, Tset1 is the rack outlet tension; Text is the single rack outlet unit tension; C 2i is the export unit tension adjustment value of the i-th aluminum product; W 2 is the target thickness of the product; T 2 The target width of the product.

[0060] When the aluminum coil arrives at the uncoiler at the entrance of the rolling mill, a tension calculation is performed, and then the aluminum product is rolled according to the single-stand tension calculated above.

[0061] The single-frame tension control method for aluminum products of the present invention is further introduced below with reference to specific examples.

[0062] Example 1

[0063] This embodiment takes the batch production of aluminum strips of a certain material specification as an example. Figure 2 The 3-meter single-frame aluminum rolling mill shown in the figure uses aluminum materials of the same aluminum type and the same specification to produce aluminum products of different product types (divided according to annealing conditions), and the specific specifications are as follows: roll number 132023920, aluminum type 6XXX, inlet material thickness 2.1mm, inlet material width 2200mm, product target width 2200mm, product target thickness 1.3mm, see Table 1; the rack inlet tension and rack outlet tension are calculated according to the aluminum product single-frame tension control method of the present invention:

[0064] Table 1

[0065] Aluminum Product Type Aluminum Type Inlet material thickness mm Inlet material width mm Product width mm Product thickness mm Unannealed products 6XXX 2.1 2200 2200 1.3 Annealed products 6XXX 2.1 2200 2200 1.3 Prepare annealed products 6XXX 2.1 2200 2200 1.3

[0066] (1) Obtaining historical rolling data of different aluminum products; aluminum product type, aluminum grade type, material thickness, material width, product thickness, product width and single-frame unit tension setting value, wherein the single-frame unit tension setting values ​​of different aluminum products are shown in Table 2;

[0067] Table 2 6XXX single rack unit tension setting value

[0068]

[0069] (2) Obtain the unit tension adjustment of different aluminum products according to the type of aluminum products, as shown in Table 3;

[0070] Table 3 Unit tension adjustment of different 6XXX aluminum products

[0071]

[0072] (3) A single-stand tension model is established and the single-stand tension is calculated based on the specifications of current aluminum products. When the steel coil arrives at the uncoiler at the entrance of the single-stand rolling mill, a tension calculation is performed:

[0073] Tset0=(Tent+C 1i )*W 1 *T 1 Rack entrance tension

[0074] Tset1=(Text+C 2i )*W 2 *T 2 Rack outlet tension

[0075] For the material with roll number 132023920, the rack inlet tension and rack outlet tension were calculated according to different aluminum product types. The results are shown in Table 4.

[0076] a. Non-annealed aluminum products

[0077] Rack inlet tension = (rack inlet unit tension + unannealed aluminum product unit tension adjustment) * inlet material width * inlet material thickness = (2.4 + 0) * 2200 * 2.1 = 11088 kg

[0078] Rack outlet tension (rack outlet unit tension + unannealed aluminum product unit tension adjustment) * product width * product thickness = (3.9 + 0) * 2200 * 1.3 = 11154 kg

[0079] b. Annealed aluminum products

[0080] Rack entrance tension = (rack entrance unit tension + annealed aluminum product unit tension adjustment) * entrance material width * entrance material thickness = (2.4 + 0.5) * 2200 * 2.1 = 13398 kg

[0081] Rack outlet tension = (rack outlet unit tension + annealed aluminum product unit tension adjustment) * product width * product thickness = (3.9 + 0.5) * 2200 * 1.3 = 12584 kg

[0082] c. Prepare annealed aluminum products

[0083] Rack entrance tension = (rack entrance unit tension + annealing aluminum product unit tension adjustment) * entrance material width * entrance material thickness = (2.4 + 0) * 2200 * 2.1 = 11088 kg

[0084] Rack outlet tension = (rack outlet unit tension + unit tension adjustment of aluminum products to be annealed) * product width * export product thickness = (3.9-0.5) * 2200 * 1.3 = 9724 kg

[0085] Table 4 6XXX rack inlet tension and rack outlet tension for different aluminum products

[0086] Aluminum Product Type Aluminum Type Rack entrance tension kg Frame outlet tension kg Unannealed products 6XXX 11088 11154 Annealed products 6XXX 13398 12584 Prepare annealed products 6XXX 11088 9724

[0087] The single-stand tension control shown in Table 4 is then used to control the rolling process of the corresponding aluminum product.

[0088] In summary, the present invention uses different tension controls for different types of aluminum products of the same aluminum type and the same specification to improve the flexibility, material tightness, yield strength and tensile strength of the products, providing a solid foundation for the long-term research and development innovation of new materials and new products, improving the accuracy of model control, continuously improving the quality of high-value-added aluminum products, improving the automatic efficiency of the unit and improving the benefits of the enterprise. It can improve the yield rate of the unit and reduce the occurrence of broken belts.

[0089] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A single-frame tension control method for aluminum products, characterized in that: The following steps are involved: S1, obtain historical rolling data of different aluminum products; S2, obtaining the unit tension adjustment amount of different aluminum products according to the type of aluminum products; S3, establish a single rack tension model; S4, calculating the single-stand tension according to the current aluminum product specifications and the single-stand tension model, and rolling the aluminum product according to the single-stand tension.

2. The single-frame tension control method for aluminum products according to claim 1 is characterized in that: In step S1, the historical rolling data of different aluminum products include aluminum product type, aluminum grade type, inlet material thickness, inlet material width, product thickness, product width and single-frame unit tension setting value.

3. The single-frame tension control method for aluminum products according to claim 2, characterized in that: The single-rack unit tension setting value includes a rack entrance unit tension and a rack exit unit tension.

4. The single-frame tension control method for aluminum products according to claim 1, characterized in that: In step S2, the unit tension adjustment amounts of the different aluminum products are as follows: When the aluminum product is a non-annealed product, the unit tension adjustment amount is 0 to 0.2 kg / mm 2 ; When the aluminum product is an annealed product, the unit tension adjustment amount is 0 to 0.8 kg / mm 2 ; When the aluminum product is to be annealed, the unit tension adjustment amount is -0.9 to 0.1 kg / mm 2 .

5. The single-frame tension control method for aluminum products according to claim 1, characterized in that: In step S3, the single-frame tension model is calculated as follows: Tset=(T i +C ni )*W*T Among them, Tset is the single-frame tension; T i , C ni are the single-frame unit tension setting value and unit tension adjustment value of the i-th aluminum product respectively; i is 0 to 2, rounded up; n is 1 or 2; W is the material width; T is the material thickness.

6. The single-frame tension control method for aluminum products according to claim 1, characterized in that: In step S4, the single rack tension includes rack inlet tension and rack outlet tension; The calculation formula of the rack inlet tension is as follows: Tset0=(Tent+C 1i )*W1*T1 Among them, Tset0 is the rack entrance tension; Tent is the single rack entrance unit tension; C 1i is the inlet unit tension adjustment value of the i-th aluminum product; W1 is the inlet material thickness; T1 is the inlet material width; i ranges from 0 to 2, rounded up; The calculation formula of the rack outlet tension is as follows: Tset1=(Text+C 2i )*W2*T2 Among them, Tset1 is the rack outlet tension; Text is the single rack outlet unit tension; C 2i is the export unit tension adjustment value of the i-th aluminum product; W2 is the target thickness of the product; T2 is the target width of the product; i ranges from 0 to 2 and is rounded.

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