Aluminum product single rack tension control method

Abstract

The application discloses a single-rack tension control method for aluminum products, and comprises the following steps: S1, obtaining historical rolling data of different aluminum products; S2, obtaining unit tension adjustment amount of different aluminum products according to aluminum product types; S3, establishing a single-rack tension model; and S4, calculating single-rack tension according to the specifications of the aluminum products and the single-rack tension model, and rolling the aluminum products according to the single-rack tension. The application controls tension during rolling of the aluminum products, so that the rolling process is stable, the unit material yield is improved, the belt breakage is reduced, and the stability of the aluminum product quality is ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of aluminum product rolling, and relates to a single-stand tension control method for aluminum products. BACKGROUND

[0002] At present, a single-stand rolling mill is widely used in the aluminum rolling process in an aluminum product production enterprise. As a single-pass rolling mill, the product tensile strength is single, and the tension control is unique in the rolling process, so different tension control cannot be used to improve the product tensile performance according to the material performance. If the tension calculation is not accurate enough in the rolling process, manual intervention is required.

[0003] In actual production, there is a fluctuation in the strength of incoming aluminum of the same aluminum type and specification. The fluctuation will cause a deviation in the set value of the tension of different aluminum strips, so that the tension and rolling resonance phenomenon occurs in the rolling process, resulting in rolling mill vibration, aluminum product thickness difference, easy breakage of the aluminum strip, and inability to produce stably. SUMMARY

[0004] In view of the above problems in the prior art, the application aims to provide a single-stand tension control method for aluminum products, which controls the tension during aluminum product rolling to make the rolling process stable, thereby improving the unit material yield, reducing the breakage of the aluminum strip, and ensuring the stability of the quality of the aluminum products.

[0005] To achieve the above-mentioned purpose, the application adopts the following technical solutions:

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

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

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

[0009] S3, establishing a single-stand tension model;

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

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

[0012] Preferably, the single-stand unit tension set value comprises a single-stand unit tension at the inlet and a single-stand unit tension at the outlet.

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

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

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

[0016] When the aluminum product is a preparation annealing product, the unit tension adjustment amount is -0.9-0.1 kg / mm 2 .

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

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

[0019] Wherein, Tset is the single-rack tension;

[0020] T i , C ni are the single-rack unit tension setting value and the unit tension adjustment amount of the i-th aluminum product respectively; i takes an integer value of 0-2; n takes a value of 1 or 2;

[0021] W is the material width;

[0022] T is the material thickness.

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

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

[0025] Tset0=(Tent+C 1i )*W1*T1

[0026] Wherein, Tset0 is the rack inlet tension; Tent is the single-rack inlet unit tension; C 1i is the inlet unit tension adjustment amount of the i-th aluminum product; W1 is the inlet material width; T1 is the inlet material thickness; i takes an integer value of 0-2;

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

[0028] Tset1=(Text+C 2i )*W2*T2

[0029] Wherein, Tset1 is the mill exit tension; Text is the single mill exit unit tension; C 2i is the i-th aluminum product exit unit tension adjustment amount; W2 is the product target width; T2 is the product target thickness; i is 0-2, and is rounded.

[0030] The aluminum product single mill tension control method provided by the application has the following beneficial effects:

[0031] 1. The aluminum product single mill tension control method according to the application uses different tension rolling for different materials to improve the material properties and improve the quality stability of the aluminum product.

[0032] 2. The aluminum product single mill tension control method according to the application can make the rolling process stable, reduce raw material waste, reduce the occurrence of belt breakage, improve the unit material yield, ensure the stability of the aluminum product quality, and improve enterprise efficiency.

[0033] 3. The application uses different tension controls for different aluminum products, the same aluminum type, and the same specification to improve the flexibility, material tightness, yield strength, and tensile strength of different aluminum products, provide a solid foundation for long-term research and innovation of new materials and new products, improve model control accuracy, continuously improve the quality of aluminum high-value-added products, improve unit automation efficiency, and improve enterprise efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0034] Other features, objects, and advantages of the application will become more apparent after reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0035] Figure 1 is a flowchart of the aluminum product single mill tension control method according to the application;

[0036] Figure 2 is a structural schematic diagram of the single mill aluminum rolling mill used in the embodiment of the application. DETAILED DESCRIPTION

[0037] In order to better understand the above technical solutions of the application, the technical solutions of the application will be further described below with reference to the embodiments.

[0038] In combination with Figure 1 the application provides an aluminum product single mill tension control method, which is based on the aluminum type, inlet material specification, and target specification in the incoming material raw data, combined with the inlet unit tension and outlet unit tension, and then gives the inlet unit tension adjustment amount and the outlet unit tension adjustment amount according to the aluminum type and the aluminum product type in the incoming material raw data, and finally calculates the inlet tension and outlet tension set values through a calculation formula. The application specifically includes the following steps:

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

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

[0041] In the historical rolling data of different aluminum products, the single-stand unit tension setting value is determined according to the aluminum type, and the single-stand unit tension setting value includes stand inlet unit tension and stand outlet unit tension. Specifically, the aluminum type, inlet material thickness, and target thickness in the raw material data must correspond to the aluminum type, inlet material thickness, and target thickness in the historical rolling data to give the inlet unit tension and outlet unit tension.

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

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

[0044] When the aluminum product is a non-annealed product, the corresponding unit tension adjustment amount C0 is 0-0.2 kg / mm 2 .

[0045] When the aluminum product is an annealed product, the corresponding unit tension adjustment amount C1 is 0-0.8 kg / mm 2 .

[0046] When the aluminum product is a prepared annealed product, the corresponding unit tension adjustment amount C2 is -0.9-0.1 kg / mm 2 .

[0047] S3, establishing a single-stand tension model;

[0048] Considering that product type, aluminum type, and product specification all have an impact on single-stand tension, such as different aluminum product types, the same aluminum type, and the same specification of materials corresponding to different single-stand tensions, and similarly, different aluminum types, the same product type, and the same specification of materials corresponding to different single-stand tensions. Therefore, a single-stand tension model is established according to the data obtained in steps S1 and S2, and the specific calculation is as follows:

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

[0050] Wherein, Tset is the single-stand tension; T i , Cni respectively, are the single-stand unit tension setting value and unit tension adjustment value of the i th aluminum product; n is 1 or 2, n = 1 is defined as the stand inlet, and n = 2 is defined as the stand outlet; i is 0-2, and is rounded; C ni is the unit tension adjustment value of the non-annealed product, and C n1 is the unit tension adjustment value of the annealed product, and C n2 is the unit tension adjustment value of the product to be annealed; W is the material width; and T is the material thickness.

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

[0052] S4, according to the specification of the current aluminum product and the single-stand tension model, the single-stand tension is calculated, and the aluminum product is rolled according to the single-stand tension.

[0053] Considering that the single-stand tension control is divided into stand inlet tension and stand outlet tension control, the single-stand tension model established in combination with the specification of the current aluminum product and step S3 includes the stand inlet tension and stand outlet tension:

[0054] The calculation formula of the stand inlet tension is as follows:

[0055] Tset0 = (Tent + C 1i ) * W1 * T1

[0056] Wherein, Tset0 is the stand inlet tension; Tent is the single-stand inlet unit tension; C 1i is the i th aluminum product inlet unit tension adjustment value; W1 is the inlet material width; and T1 is the inlet material thickness.

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

[0058] Tset1 = (Text + C 2i ) * W2 * T2

[0059] Wherein, Tset1 is the stand outlet tension; Text is the single-stand outlet unit tension; C 2i is the i th aluminum product outlet unit tension adjustment value; W2 is the product target width; and T2 is the product target thickness.

[0060] A tension calculation is performed when the aluminum coil is unwound on the unwinder at the entry of the rolling mill, and then the rolling of the aluminum product is performed according to the calculated single stand tension.

[0061] The aluminum product single stand tension control method of the present application is further described below with specific examples.

[0062] Example 1

[0063] This example takes the production of aluminum products of a certain material specification in batch as an example, and uses the same aluminum material of the same specification to produce aluminum products of different product types (classified according to annealing conditions) on the 3-meter single stand aluminum rolling mill shown in the figure, and the specific specifications are as follows: coil number 132023920, aluminum type 6XXX, entry material thickness 2.1 mm, entry material width 2200 mm, product target width 2200 mm, product target thickness 1.3 mm, see Table 1; the entry tension and exit tension of the stand are calculated according to the aluminum product single stand tension control method of the present application: Figure 2

[0064] Table 1

[0065] Aluminium product type Aluminium alloy Inlet material thickness mm Inlet material width mm Product width mm Product thickness mm Non-annealed product 6XXX 2.1 2200 2200 1.3 Annealed product 6XXX 2.1 2200 2200 1.3 Ready to anneal product 6XXX 2.1 2200 2200 1.3

[0066] (1) Obtain historical rolling data of different aluminum products; aluminum product type, aluminum type, material thickness, material width, product thickness, product width, and single stand unit tension set value, wherein the single stand unit tension set value of different aluminum products is shown in Table 2;

[0067] Table 2 Single stand unit tension set value of 6XXX

[0068]

[0069] (2) Obtain the unit tension adjustment amount of different aluminum products according to the aluminum product type, see Table 3;

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

[0071]

[0072] (3) Establish a single stand tension model and calculate the single stand tension combined with the specification of the current aluminum product, and perform a tension calculation when the steel coil is unwound on the unwinder at the entry of the single stand rolling mill:

[0073] Tset0 = (Tent + C 1i )*W1*T1 Stand entry tension

[0074] Tset1 = (Text + C 2i ​W2*T2 rack exit tension

[0075] The material of docket number 132023920, the rack entry tension and the rack exit tension are calculated according to different aluminum product types, and the results are shown in Table 4.

[0076] a. Non-annealed aluminum product

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

[0078] Rack exit tension = (rack exit unit tension + non-annealed aluminum product unit tension adjustment) * product width * product thickness = (3.9 + 0) * 2200 * 1.3 = 11154 kg

[0079] b. Annealed aluminum product

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

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

[0082] c. Prepared annealed aluminum product

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

[0084] Rack exit tension = (rack exit unit tension + prepared annealed aluminum product unit tension adjustment) * product width * exit product thickness = (3.9 - 0.5) * 2200 * 1.3 = 9724 kg

[0085] Table 4 Rack entry tension and rack exit tension of 6XXX different aluminum products

[0086] Aluminium product type Aluminium alloy Couch inlet tension kg Couch outlet tension kg Non-annealed product 6XXX 11088 11154 Annealed product 6XXX 13398 12584 Ready to anneal product 6XXX 11088 9724

[0087] Then the rolling process of the corresponding aluminum product is controlled using the single rack tension control shown in Table 4.

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

[0089] Those skilled in the art of the present technology should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation of the present application, as long as the changes and modifications of the above described embodiments are within the scope of the spirit of the present application.

Claims

1. A single stand tension control method for an aluminum product, characterized by, The method comprises the following steps: S1, obtaining historical rolling data of different aluminum products; S2, obtaining unit tension adjustment amount of different aluminum products according to aluminum product type; S3, establishing a single stand tension model; S4, calculating single stand tension according to the specification of the current aluminum product and the single stand tension model, and rolling the aluminum product according to the single stand tension, In the step S1, the historical rolling data of different aluminum products includes aluminum product type, aluminum type, inlet material thickness, inlet material width, product thickness, product width and single stand unit tension setting value, The single stand unit tension setting value includes stand inlet unit tension and stand outlet unit tension, In the step S2, the unit tension adjustment amount of different aluminum products is 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 a product to be prepared for annealing, the unit tension adjustment amount is -0.9 to 0.1 kg / mm 2 .

2. The single stand tension control method for aluminum products according to claim 1, characterized by, In the step S3, the single stand tension model is calculated as follows: Tset = (T i + C ni ) * W * T Wherein, Tset is the single stand tension; T i , C ni respectively are the single rack unit tension setting value and the unit tension adjustment amount of the i-th aluminum product; i takes an integer value of 0-2; n takes a value of 1 or 2; W is the material width; T is the material thickness.

3. The single stand tension control method for aluminum products according to claim 1, characterized by, In the step S4, the single stand tension includes stand inlet tension and stand outlet tension; The calculation formula of the stand inlet tension is as follows: Tset0 = (Tent + C 1i )*W1*T1 Wherein, Tset0 is the frame entrance tension; Tent is the single frame entrance unit tension; C 1i is the i-th aluminum product entrance unit tension adjustment amount; W1 is the entrance material width; T1 is the entrance material thickness; i takes the value of 0-2, and is rounded. The calculation formula of the stand outlet tension is as follows: Tset1 = (Text + C 2i )*W2*T2 Wherein, Tset1 is the exit tension of the rack; Text is the unit exit tension of the single rack; C 2i is the exit unit tension adjustment of the i th aluminum product; W2 is the target width of the product; T2 is the target thickness of the product; i takes the value of 0-2, and is rounded.

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