On-line detection method and device for mechanical properties of annealed continuous hot-dip aluminum-zinc coated steel strip

Abstract

The present invention discloses an on-line detection method and device for the mechanical properties of annealed products in a continuous hot-dip aluminum-zinc strip production line, which relates to the technical field of continuous hot-dip aluminum-zinc production. The method includes the following steps: S1: Obtain the strip product specifications, production speed, and tension leveling machine process parameters; S2: Calculate the elastic modulus of the product according to the product specifications and the tension leveling machine process parameters; S3: Construct an on-line mechanical property database for the products in the continuous hot-dip aluminum-zinc strip production line, and obtain the mechanical property parameters of the strip products from the database and send them to the production line process control system. The on-line detection method and device for the mechanical properties of annealed products in a continuous hot-dip aluminum-zinc strip production line provided by the present invention are used to detect the annealing performance of the products in the continuous hot-dip aluminum-zinc production line in real time, and provide data support for the adjustment of the annealing process of the annealing furnace in a timely manner, so as to solve the product quality problems and energy consumption waste problems caused by the lag in the adjustment of the annealing process of the annealing furnace.

Description

Technical Field

[0001] The present invention relates to the technical field of continuous hot-dip aluminum-zinc production, and particularly relates to an on-line detection method for the annealing mechanical properties of strip continuous hot-dip aluminum-zinc products. Background Art

[0002] In continuous hot-dip aluminum-zinc production, the detection and control of the annealing performance of products are the key to the production process. The current method is as follows: using a fixed annealing process, first produce a coil (about 10-25 tons) of hot-dip aluminum-zinc products, take samples and send them to the inspection room to detect the product quality. The main operator of the production line process adjusts the annealing process according to the inspection results and experience. This cycle is repeated until the annealing process meets the requirements of the product annealing performance.

[0003] However, in the prior art, the adjustment response speed of the annealing process is slow, resulting in a large number of unqualified products. Or, in order to avoid producing unqualified products, a higher annealing process is adopted, resulting in waste of annealing furnace energy. Summary of the Invention

[0004] An on-line detection method and device for the annealing mechanical properties of strip continuous hot-dip aluminum-zinc production line products provided by the present invention aims to solve the problems existing in the above background art.

[0005] In order to achieve the above technical objectives, the present invention mainly adopts the following technical solutions:

[0006] In the first aspect, the present invention provides an on-line detection method for the annealing mechanical properties of strip continuous hot-dip aluminum-zinc production line products, including the following steps:

[0007] S1: Obtain the strip product specifications, production speed, and tension leveling machine process parameters;

[0008] S2: Calculate the elastic modulus of the product according to the product specifications and tension leveling machine process parameters;

[0009] S3: Construct an on-line mechanical property database for strip continuous hot-dip aluminum-zinc production line products, and obtain the strip product mechanical property parameters from the database and send them to the production line process control system.

[0010] In a preferred embodiment of the present invention, in step S1, the product specifications include the plate width and plate thickness, and the tension leveling machine process parameters include the tension leveling force, the tension leveling machine downward pressure, and the on-line tension leveling machine tension leveling elongation.

[0011] Further, the on-line tension leveling machine tension leveling elongation is the elongation obtained by the production line tension leveling machine stretching the product to make the product extend. The tension leveling machine elongation is calculated using the following formula:

[0012] A = (V1 - V2) / V1

[0013] A—Elongation rate during product straightening / %, V1—Rotational speed of the inlet rolls of the straightening machine / (r / min), V2—Rotational speed of the outlet rolls of the straightening machine (r / min).

[0014] Furthermore, in step S2, the elastic modulus of the product is calculated using the following formula:

[0015]

[0016] Where, E—Elastic modulus / GPa, F—Straightening force of the straightening machine / KN, B—Width of the plate / mm, D—Thickness of the plate / mm, A—Elongation rate of the wire straightening machine during straightening / %, n—Conversion coefficient of the straightening force of the straightening machine.

[0017] In a preferred embodiment of the present invention, in step S3, an on-line mechanical property database for the products of the continuous hot-dip aluminum-zinc strip production line is constructed, including the following steps:

[0018] S31: Obtain the on-line mechanical property data of the product specifications, the downward pressure of the straightening machine, the elastic modulus of the product, and the production speed, to obtain n sets of sample data, where n is an integer greater than 0;

[0019] S32: Preprocess the n sets of sample data to obtain m sets of sample on-line mechanical property data, where m is an integer greater than 0 and not greater than n;

[0020] S33: Process the mechanical property data of products with the same product specifications, downward pressure of the straightening machine, and production speed, but different elastic moduli, and establish an on-line mechanical property database corresponding to the on-line elastic modulus of the product under various conditions of product specifications, downward pressure of the straightening machine, and production speed.

[0021] Further, in step S32, the method for preprocessing the n sets of sample data includes:

[0022] For products of the same specification, adopt the same annealing process and the same downward pressure of the straightening machine, on-line record the elongation rate of the straightening machine during straightening, analyze the data characteristics and process the data fluctuations, then correspond the elongation rate of the straightening machine during straightening with the actual mechanical properties of the product to obtain the mechanical properties of the product corresponding to the elongation rate of the straightening machine during straightening of this specification product. Change the annealing process to make the elongation rate of the straightening machine during straightening change, and obtain the mechanical properties of the product corresponding to the changed elongation rate.

[0023] Change the product specification, so as to obtain the mechanical properties of the product corresponding to the elongation rate of the straightening machine during straightening of different specification products.

[0024] Second, the present invention also provides an on-line detection device for the annealing mechanical properties of the products of the continuous hot-dip aluminum-zinc strip production line, including:

[0025] Production line process control system: used to obtain strip product specifications and production speed online and send the results to the main control system; and can correct product mechanical property parameters according to the comparison results between the product quality detection data system and the online mechanical property database;

[0026] Production line tension leveling machine: used to tension level products;

[0027] Production line tension leveling machine control system: connected to the production line tension leveling machine, controls the actions of the production line tension leveling machine, is used to obtain tension leveling machine process parameters, and sends the results to the main control system;

[0028] Product quality detection data system: obtains the actual quality data of the annealing mechanical properties of the production line products and sends the results to the main control system;

[0029] Main control system: connected to the production line process control system, production line tension leveling machine control system and product quality detection data system, the main control system has an online mechanical property database of products built in, the main control system receives the results from the production line process control system and production line tension leveling machine control system, calculates the elastic modulus of the product, integrates the elastic modulus of the product with the results sent by the production line process control system, compares the integrated data results with the results sent by the product quality detection data system, and sends the comparison results to the production line process control system.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] An online detection method and device for the annealing mechanical properties of strip continuous hot-dip aluminized zinc production line products provided by the present invention are used to detect the annealing performance of strip continuous hot-dip aluminized zinc production line products in real time, and provide data support for the adjustment of the annealing process of the annealing furnace in a timely manner, so as to solve the product quality problems and energy consumption waste problems caused by the lag in the adjustment of the annealing process of the annealing furnace. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0033] Embodiment 1

[0034] An online detection method for the annealing mechanical properties of strip continuous hot-dip aluminized zinc production line products includes the following steps:

[0035] S1: Obtain the strip product specifications, production speed, and tension leveling machine process parameters; among them, the product specifications include the strip width and thickness, and the tension leveling machine process parameters include the tension leveling force, the downward pressure of the tension leveling machine, and the tension leveling elongation rate of the on-line tension leveling machine. Among them, the tension leveling elongation rate of the on-line tension leveling machine is the elongation rate generated when the production line tension leveling machine passes through the tension leveling product to extend the product, and the tension leveling elongation rate of the tension leveling machine is calculated using the following formula:

[0036] A = (V1 - V2) / V1

[0037] A—Elongation rate during product tension leveling / %, V1—Rotational speed of the inlet roll of the tension leveling machine / (r / min), V2—Rotational speed of the outlet roll of the tension leveling machine (r / min).

[0038] S2: Calculate the elastic modulus of the product according to the product specifications and the tension leveling machine process parameters; to avoid the fluctuation error caused by the fluctuation of the tension leveling elongation rate caused by the fluctuation of the tension leveling machine process parameters.

[0039] The elastic modulus of the product is calculated using the following formula:

[0040]

[0041] Among them, E—Elastic modulus / GPa, F—Tension leveling force of the tension leveling machine / KN, B—Strip width / mm, D—Strip thickness / mm, A—Tension leveling elongation rate of the tension leveling machine / %, n—Tension leveling force conversion coefficient of the tension leveling machine.

[0042] S3: Construct an on-line mechanical property database for strip continuous hot-dip aluminized zinc production line products, and obtain the strip product mechanical property parameters from the database and send them to the production line process control system.

[0043] The elongation rate of the product generated by the tension leveling force of the tension leveling machine is used to calculate the elastic modulus of the product by the formula in step S2. Through the large data collection of different product specifications and different annealing furnace annealing processes, and the product specifications, product elastic modulus and product actual annealing performance (tensile strength, actual elongation rate) are corresponding to establish a product performance database.

[0044] Specifically, constructing an on-line mechanical property database for strip continuous hot-dip aluminized zinc production line products includes the following steps:

[0045] S31: Obtain the on-line mechanical property data of product specifications, downward pressure of the tension leveling machine, product elastic modulus and production speed, and obtain n sets of sample data, where n is an integer greater than 0;

[0046] S32: Preprocess the n sample data to obtain m sample on-line mechanical property data, where m is an integer greater than 0 and not greater than n;

[0047] S33: Process the mechanical property data of products with the same product specifications, reduction of the tension leveling machine, and production speed, but different elastic moduli, and establish an online mechanical property database corresponding to the online elastic modulus of the products under various product specifications, reduction of the tension leveling machine, and production speed conditions.

[0048] Among them, the presentation form of the online mechanical property database of the products is shown in Table 1 below.

[0049] Table 1 Online Mechanical Property Database of Products

[0050]

[0051] Furthermore, in step S32, the method for preprocessing the n sample data includes:

[0052] For products of the same specification, adopt the same annealing process and the same reduction of the tension leveling machine, record the elongation rate of the tension leveling machine online, analyze the data characteristics and process the data fluctuations, then correspond the elongation rate of the tension leveling machine with the actual mechanical properties of the products to obtain the mechanical properties of the products corresponding to the elongation rate of the tension leveling machine of this specification product. Replace the annealing process to change the elongation rate of the tension leveling machine and obtain the mechanical properties of the products corresponding to the changed elongation rate;

[0053] Replace the product specification to obtain the mechanical properties of the products corresponding to the elongation rate of the tension leveling machine of different specification products.

[0054] After the online mechanical property database of the products is established, the online product performance detection calculates the elastic modulus of the products detected by the tension leveling machine, combines the product specifications, and then searches through database comparison to determine the quality characteristics of the products. It is used to detect the annealing performance of the products on the continuous hot-dip aluminum-zinc production line in real time, and provides data support for the adjustment of the annealing process of the annealing furnace in a timely manner, so as to solve the product quality problems and energy consumption waste problems caused by the lag in the adjustment of the annealing process of the annealing furnace.

[0055] Embodiment 2

[0056] An on-line detection device for the annealing mechanical properties of products on a strip continuous hot-dip aluminum-zinc production line includes:

[0057] The production line process control system: used to obtain the strip product specifications and production speed online and send the results to the main control system; and can correct the product mechanical property parameters according to the comparison results between the product quality detection data system and the online mechanical property database;

[0058] Specifically, the production line process control system collects the product specification (width and thickness of the strip) and production speed parameters (linear speed when the product passes through the tension leveling machine) and transmits them to the main control system.

[0059] Production line straightening machine: used to straighten products, extend the products, and generate elongation rate;

[0060] Production line straightening machine control system: connected to the production line straightening machine, controls the operation of the production line straightening machine, and is used to obtain the process parameters of the straightening machine, including the downward pressure of the straightening machine, the straightening force of the straightening machine, and the elongation rate of the product, and sends the results to the main control system;

[0061] Product quality inspection data system: obtains the actual quality data of the annealing mechanical properties of the production line products, including the tensile strength, the actual elongation rate, etc., and sends the results to the main control system;

[0062] Main control system: connected to the production line process control system, the production line straightening machine control system, and the product quality inspection data system. The main control system has an in-built online mechanical property database of products. The main control system receives the results from the production line process control system and the production line straightening machine control system, calculates the elastic modulus of the product, integrates the elastic modulus of the product with the results sent by the production line process control system, compares the integrated data results with the results sent by the product quality inspection data system, and sends the comparison results to the production line process control system.

[0063] In the description of this specification, the descriptions referring to terms such as "first", "specific embodiment", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0064] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An on-line detection method for the mechanical properties of the annealed products of a continuous hot-dip aluminum-zinc coated steel strip production line, characterized in that, It includes the following steps: S1: Obtain the strip product specifications, production speed and the process parameters of the tension leveling machine; S2: Calculate the elastic modulus of the product according to the product specifications and the process parameters of the tension leveling machine; S3: Construct an on-line mechanical property database for the products of the continuous hot-dip aluminized zinc strip production line, obtain the mechanical property parameters of the strip products from the database and send them to the production line process control system; In step S1, the product specifications include the plate width and plate thickness, and the process parameters of the tension leveling machine include the tension leveling force, the downward pressure of the tension leveling machine and the elongation rate of the on-line tension leveling machine; The elongation rate of the on-line tension leveling machine is that the tension leveling machine of the production line passes through the tension leveling of the product to extend the product and obtain the generated elongation rate. The elongation rate of the tension leveling machine is calculated by the following formula: A = (V1 - V2) / V1 A - elongation rate of the product during tension leveling / %, V1 - rotational speed of the inlet roll of the tension leveling machine, V2 - rotational speed of the outlet roll of the tension leveling machine, where the rotational speeds V1 of the inlet roll of the tension leveling machine and V2 of the outlet roll of the tension leveling machine are both calculated in r / min; In step S2, the elastic modulus of the product is calculated by the following formula: Where, E - elastic modulus / GPa, F - tension leveling force of the tension leveling machine / KN, B - plate width / mm, D - plate thickness / mm, A - elongation rate of the tension leveling machine / %, n - conversion coefficient of the tension leveling force of the tension leveling machine; In step S3, constructing an on-line mechanical property database for the products of the continuous hot-dip aluminized zinc strip production line includes the following steps: S31: Obtain the on-line mechanical property data of the product specifications, the downward pressure of the tension leveling machine, the elastic modulus of the product and the production speed, and obtain n sample data, where n is an integer greater than 0; S32: Preprocess the n sample data to obtain m sample on-line mechanical property data, where m is an integer greater than 0 and not greater than n; S33: Process the mechanical property data of the products with the same product specifications, the downward pressure of the tension leveling machine and the production speed, but with different elastic moduli, and establish an on-line mechanical property database corresponding to the on-line elastic modulus of the products under various conditions of product specifications, the downward pressure of the tension leveling machine and the production speed.

2. The online detection method for the mechanical properties of the annealed products in the continuous hot-dip aluminum-zinc production line for strip steel according to claim 1, characterized in that: In step S32, the method for preprocessing the n sample data includes: For products of the same specification, adopt the same annealing process and the same downward pressure of the tension leveling machine, on-line record the elongation rate of the tension leveling machine of the tension leveling machine, analyze the data characteristics and process the data fluctuations, and then correspond the elongation rate of the tension leveling machine of the tension leveling machine with the actual mechanical properties of the product to obtain the mechanical properties of the product corresponding to the elongation rate of the tension leveling machine of the tension leveling machine of this specification product. Replace the annealing process to change the elongation rate of the tension leveling machine of the tension leveling machine and obtain the mechanical properties of the product corresponding to the changed elongation rate; Replace the product specifications to obtain the mechanical properties of the product corresponding to the elongation rate of the tension leveling machine of the tension leveling machine of different specification products.

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