A method for optimizing the running acceleration of galvanized heat-treated strip steel

Abstract

The present invention relates to a method for optimizing the running acceleration of galvanized heat-treated strip steel, comprising: 1) dividing the strip steel thickness H into NH thickness ranges; 2) dividing the strip steel outlet temperature T into NT outlet temperature ranges; 3) setting the strip steel running acceleration according to the strip steel thickness and the strip steel outlet temperature; 4) dividing the strip steel width B into NB width ranges; the influence of the strip steel width on the strip steel running acceleration is divided into three situations: 5) after setting the corresponding strip steel running acceleration according to steps 1) to 4), directly assigning values ​​to the strip steel running acceleration for situations not involved. The present invention is beneficial to the stable transition of the strip steel running speed when the strip steel size or the strip steel outlet temperature setting changes frequently, thereby ensuring the stable transition of the plate temperature and finally achieving stable product performance.

Description

Technical Field

[0001] The invention relates to the technical field of cold rolling heat treatment, and in particular to a method for optimizing the setting of running acceleration of galvanized heat-treated strip steel. Background Art

[0002] The cold-rolled and hot-dip galvanized continuous annealing process is an important part of the cold-rolled strip galvanizing production, and has an important impact on the strip performance of the galvanized product. The continuous annealing unit is a continuous production line that concentrates the degreasing, annealing, leveling, and finishing processes of the strip after cold rolling on one operating line. It has a series of advantages such as short process, high output, and good product quality. During the continuous annealing process, the strip outlet target temperature must be adjusted accordingly as the production plan changes. This change will have a great impact on the control system and the entire production process. Poor control will directly affect the performance of the finished strip. Summary of the invention

[0003] The present invention provides a method for optimizing the setting of the running acceleration of a galvanized heat-treated strip steel, which is beneficial to the stable transition of the running speed of the strip steel when the strip steel size or the strip steel outlet temperature setting changes frequently, thereby ensuring the stable transition of the plate temperature and ultimately achieving stable product performance.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for optimizing the running acceleration of a galvanized heat-treated strip steel comprises the following steps:

[0006] 1) Divide the strip thickness H into N H Thickness range;

[0007] 2) The strip outlet temperature T is divided into N T Outlet temperature range;

[0008] 3) Set the strip running acceleration according to the strip thickness and strip outlet temperature;

[0009] The running acceleration of the strip includes the acceleration of speed increase and the acceleration of speed decrease. The acceleration when the running speed of the strip increases is the acceleration of speed increase, and the acceleration when the running speed of the strip decreases is the acceleration of speed decrease. The units of the acceleration of speed increase and the acceleration of speed decrease are both mpm / min.

[0010] Corresponding to each strip thickness range, when the strip outlet temperature increases, the speed-up acceleration and speed-down acceleration of the strip during operation both tend to decrease gradually, or remain unchanged within the set thickness range;

[0011] 4) Divide the strip width B into N B The influence of strip width on strip running acceleration can be divided into the following three cases:

[0012] a. Within the set strip thickness range, corresponding to all strip width ranges, only when the outlet temperature increases, the speed-up acceleration and speed-down acceleration of the strip during operation will gradually decrease, or remain unchanged within the set thickness range;

[0013] b. Within the set strip width range, as the strip thickness increases and the outlet temperature rises, the speed-up acceleration and speed-down acceleration of the strip during operation tend to gradually decrease, or remain unchanged within the set thickness range;

[0014] c. When the strip width increases, the strip thickness increases, and the outlet temperature rises, the speed-up acceleration and speed-down acceleration of the strip during operation tend to decrease gradually, or remain unchanged within the set thickness range;

[0015] 5) After setting the corresponding strip running acceleration according to steps 1) to 4), directly assign the strip running acceleration to the situations not involved;

[0016] In the step 1), the strip thickness H is divided into N H The specific thickness ranges are: [0.3~0.5), [0.5~0.8), [0.8~1.2), [1.2~1.6), [1.6~2.0), [2.0~2.6], in mm;

[0017] In the step 2), the strip outlet temperature T is divided into N T The specific outlet temperature ranges are: [0~740), [740~780), [780~820), [820~840), [840~860), [860~900], in °C;

[0018] In the step 4), the strip width B is divided into N B The specific width ranges are: [750~990), [990~1230), [1230~1460), [1460~1700), [1700~1930], in mm.

[0019] When the thickness range of the strip is [0.3~0.5), corresponding to all the width ranges of the strip, the running acceleration of the strip is set as follows:

[0020] The outlet temperature range is [0~740), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min;

[0021] The outlet temperature range is [740~780), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min;

[0022] The outlet temperature range is [780~820), the acceleration of speed increase is 38.15199mpm / min, and the acceleration of speed decrease is 45.78239mpm / min;

[0023] The outlet temperature range is [820~840), the acceleration of speed increase is 36.57291mpm / min, and the acceleration of speed decrease is 43.88749mpm / min;

[0024] The outlet temperature range is [840~860), the acceleration of speed increase is 34.58715mpm / min, and the acceleration of speed decrease is 41.50458mpm / min;

[0025] The outlet temperature range is [860~900), the acceleration of speed increase is 31.35192mpm / min, and the acceleration of speed decrease is 37.62231mpm / min.

[0026] When the strip thickness range is [0.5~0.8) and the width range is [750~990), the strip running acceleration is set as follows:

[0027] The outlet temperature range is [0~740), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min;

[0028] The outlet temperature range is [740~780), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min;

[0029] The outlet temperature range is [780~820), the acceleration of speed increase is 38.15199mpm / min, and the acceleration of speed decrease is 45.78239mpm / min;

[0030] The outlet temperature range is [820~840), the acceleration of speed increase is 36.57291mpm / min, and the acceleration of speed decrease is 43.88749mpm / min;

[0031] The outlet temperature range is [840~860), the acceleration of speed increase is 34.58715mpm / min, and the acceleration of speed decrease is 41.50458mpm / min;

[0032] The outlet temperature range is [860~900), the acceleration of speed increase is 31.35192mpm / min, and the acceleration of speed decrease is 37.62231mpm / min.

[0033] When the thickness range of the strip is [0.5~0.8) and the width range is [990~1230), [1230~1460), [1460~1700), [1700~1930], the strip running acceleration is set as follows:

[0034] The outlet temperature range is [0~740), the acceleration of speed increase is 24.58364mpm / min, and the acceleration of speed decrease is 29.50036mpm / min;

[0035] The outlet temperature range is [740~780), the acceleration of speed increase is 24.36799mpm / min, and the acceleration of speed decrease is 29.24159mpm / min;

[0036] The outlet temperature range is [780~820), the acceleration of speed increase is 23.48533mpm / min, and the acceleration of speed decrease is 28.18239mpm / min;

[0037] The outlet temperature range is [820~840), the acceleration of speed increase is 21.90624mpm / min, and the acceleration of speed decrease is 26.28749mpm / min;

[0038] The outlet temperature range is [840~860), the acceleration of speed increase is 19.92048mpm / min, and the acceleration of speed decrease is 23.90458mpm / min;

[0039] The outlet temperature range is [860~900), the acceleration of speed increase is 16.68526mpm / min, and the acceleration of speed decrease is 20.02231mpm / min.

[0040] When the thickness range of the strip is [0.8~1.2) and the width range is [750~990) and [990~1230), the strip running acceleration is set as follows:

[0041] The outlet temperature range is [0~740), the acceleration of speed increase is 24.58364mpm / min, and the acceleration of speed decrease is 29.50036mpm / min;

[0042] The outlet temperature range is [740~780), the acceleration of speed increase is 24.36799mpm / min, and the acceleration of speed decrease is 29.24159mpm / min;

[0043] The outlet temperature range is [780~820), the acceleration of speed increase is 23.48533mpm / min, and the acceleration of speed decrease is 28.18239mpm / min;

[0044] The outlet temperature range is [820~840), the acceleration of speed increase is 21.90624mpm / min, and the acceleration of speed decrease is 26.28749mpm / min;

[0045] The outlet temperature range is [840~860), the acceleration of speed increase is 19.92048mpm / min, and the acceleration of speed decrease is 23.90458mpm / min;

[0046] The outlet temperature range is [860~900), the acceleration of speed increase is 16.68526mpm / min, and the acceleration of speed decrease is 20.02231mpm / min.

[0047] When the thickness range of the strip is [0.8~1.2) and the width range is [1230~1460), [1460~1700), [1700~1930], the running acceleration of the strip is set as follows:

[0048] The outlet temperature range is [0~740), the acceleration of speed increase is 14.32723mpm / min, and the acceleration of speed decrease is 17.19267mpm / min;

[0049] The outlet temperature range is [740~780), the acceleration of speed increase is 14.11158mpm / min, and the acceleration of speed decrease is 16.93390mpm / min;

[0050] The outlet temperature range is [780~820), the acceleration of speed increase is 13.22892mpm / min, and the acceleration of speed decrease is 15.87470mpm / min;

[0051] The outlet temperature range is [820~840), the acceleration of speed increase is 11.64983mpm / min, and the acceleration of speed decrease is 13.97980mpm / min;

[0052] The outlet temperature range is [840~860), the acceleration of speed increase is 9.66407mpm / min, and the acceleration of speed decrease is 11.95689mpm / min;

[0053] The outlet temperature range is [860~900), the acceleration of speed increase is 8.07692mpm / min, and the acceleration of speed decrease is 9.69231mpm / min.

[0054] When the thickness range of the strip is [1.2~1.6) and the width range is [750~990), [990~1230), [1230~1460), the running acceleration of the strip is set as follows:

[0055] The outlet temperature range is [0~740), the acceleration of speed increase is 14.32723mpm / min, and the acceleration of speed decrease is 17.19267mpm / min;

[0056] The outlet temperature range is [740~780), the acceleration of speed increase is 14.11158mpm / min, and the acceleration of speed decrease is 16.93390mpm / min;

[0057] The outlet temperature range is [780~820), the acceleration of speed increase is 13.22892mpm / min, and the acceleration of speed decrease is 15.87470mpm / min;

[0058] The outlet temperature range is [820~840), the acceleration of speed increase is 11.64983mpm / min, and the acceleration of speed decrease is 13.97980mpm / min;

[0059] The outlet temperature range is [840~860), the acceleration of speed increase is 9.66407mpm / min, and the acceleration of speed decrease is 11.95689mpm / min;

[0060] The outlet temperature range is [860~900), the acceleration of speed increase is 8.07692mpm / min, and the acceleration of speed decrease is 9.69231mpm / min.

[0061] When the strip thickness range is [1.2~1.6) and the width range is [1460~1700) and [1700~1930], the strip running acceleration is set as follows:

[0062] The outlet temperature range is [0~740), the acceleration of speed increase is 7.03978mpm / min, and the acceleration of speed decrease is 8.44773mpm / min;

[0063] The outlet temperature range is [740~780), the acceleration of speed increase is 6.82413mpm / min, and the acceleration of speed decrease is 8.18896mpm / min;

[0064] The outlet temperature range is [780~820), the acceleration of speed increase is 5.94147mpm / min, and the acceleration of speed decrease is 7.12976mpm / min;

[0065] The outlet temperature range is [820~840), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min;

[0066] The outlet temperature range is [840~860), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min;

[0067] The outlet temperature range is [860~900), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min.

[0068] When the thickness range of the strip is [1.6~2.0) and the width range is [750~990), [990~1230), [1230~1460), [1460~1700), the running acceleration of the strip is set as follows:

[0069] The outlet temperature range is [0~740), the acceleration of speed increase is 7.03978mpm / min, and the acceleration of speed decrease is 8.44773mpm / min;

[0070] The outlet temperature range is [740~780), the acceleration of speed increase is 6.82413mpm / min, and the acceleration of speed decrease is 8.18896mpm / min;

[0071] The outlet temperature range is [780~820), the acceleration of speed increase is 5.94147mpm / min, and the acceleration of speed decrease is 7.12976mpm / min;

[0072] The outlet temperature range is [820~840), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min;

[0073] The outlet temperature range is [840~860), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min;

[0074] The outlet temperature range is [860~900), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min.

[0075] In the step 5), the specific values ​​directly assigned are: the acceleration for increasing speed is 3.79798 mpm / min, and the acceleration for decreasing speed is 4.55758 mpm / min.

[0076] Compared with the prior art, the present invention has the following beneficial effects:

[0077] The present invention provides a method for optimizing the setting of the running acceleration of a galvanized heat-treated strip steel, which is beneficial to the stable transition of the running speed of the strip steel when the strip steel size or the strip steel outlet temperature setting changes frequently, thereby ensuring the stable transition of the plate temperature and ultimately achieving stable product performance. DETAILED DESCRIPTION

[0078] The method for optimizing the running acceleration of galvanized heat-treated steel strip described in the present invention comprises the following steps:

[0079] 1) Divide the strip thickness H into N H Thickness range;

[0080] 2) The strip outlet temperature T is divided into N T Outlet temperature range;

[0081] 3) Set the strip running acceleration according to the strip thickness and strip outlet temperature;

[0082] The running acceleration of the strip includes the acceleration of speed increase and the acceleration of speed decrease. The acceleration when the running speed of the strip increases is the acceleration of speed increase, and the acceleration when the running speed of the strip decreases is the acceleration of speed decrease. The units of the acceleration of speed increase and the acceleration of speed decrease are both mpm / min.

[0083] Corresponding to each strip thickness range, when the strip outlet temperature increases, the speed-up acceleration and speed-down acceleration of the strip during operation both tend to decrease gradually, or remain unchanged within the set thickness range;

[0084] 4) Divide the strip width B into N B The influence of strip width on strip running acceleration can be divided into the following three cases:

[0085] a. Within the set strip thickness range, corresponding to all strip width ranges, only when the outlet temperature increases, the speed-up acceleration and speed-down acceleration of the strip during operation will gradually decrease, or remain unchanged within the set thickness range;

[0086] b. Within the set strip width range, as the strip thickness increases and the outlet temperature rises, the speed-up acceleration and speed-down acceleration of the strip during operation tend to gradually decrease, or remain unchanged within the set thickness range;

[0087] c. When the strip width increases, the strip thickness increases, and the outlet temperature rises, the speed-up acceleration and speed-down acceleration of the strip during operation tend to decrease gradually, or remain unchanged within the set thickness range;

[0088] 5) After setting the corresponding strip running acceleration according to steps 1) to 4), directly assign the strip running acceleration to the situations not involved;

[0089] In the step 1), the strip thickness H is divided into N H The specific thickness ranges are: [0.3~0.5), [0.5~0.8), [0.8~1.2), [1.2~1.6), [1.6~2.0), [2.0~2.6], in mm;

[0090] In the step 2), the strip outlet temperature T is divided into N T The specific outlet temperature ranges are: [0~740), [740~780), [780~820), [820~840), [840~860), [860~900], in °C;

[0091] In the step 4), the strip width B is divided into N B The specific width ranges are: [750~990), [990~1230), [1230~1460), [1460~1700), [1700~1930], in mm.

[0092] When the thickness range of the strip is [0.3~0.5), corresponding to all the width ranges of the strip, the running acceleration of the strip is set as follows:

[0093] The outlet temperature range is [0~740), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min;

[0094] The outlet temperature range is [740~780), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min;

[0095] The outlet temperature range is [780~820), the acceleration of speed increase is 38.15199mpm / min, and the acceleration of speed decrease is 45.78239mpm / min;

[0096] The outlet temperature range is [820~840), the acceleration of speed increase is 36.57291mpm / min, and the acceleration of speed decrease is 43.88749mpm / min;

[0097] The outlet temperature range is [840~860), the acceleration of speed increase is 34.58715mpm / min, and the acceleration of speed decrease is 41.50458mpm / min;

[0098] The outlet temperature range is [860~900), the acceleration of speed increase is 31.35192mpm / min, and the acceleration of speed decrease is 37.62231mpm / min.

[0099] When the strip thickness range is [0.5~0.8) and the width range is [750~990), the strip running acceleration is set as follows:

[0100] The outlet temperature range is [0~740), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min;

[0101] The outlet temperature range is [740~780), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min;

[0102] The outlet temperature range is [780~820), the acceleration of speed increase is 38.15199mpm / min, and the acceleration of speed decrease is 45.78239mpm / min;

[0103] The outlet temperature range is [820~840), the acceleration of speed increase is 36.57291mpm / min, and the acceleration of speed decrease is 43.88749mpm / min;

[0104] The outlet temperature range is [840~860), the acceleration of speed increase is 34.58715mpm / min, and the acceleration of speed decrease is 41.50458mpm / min;

[0105] The outlet temperature range is [860~900), the acceleration of speed increase is 31.35192mpm / min, and the acceleration of speed decrease is 37.62231mpm / min.

[0106] When the thickness range of the strip is [0.5~0.8) and the width range is [990~1230), [1230~1460), [1460~1700), [1700~1930], the strip running acceleration is set as follows:

[0107] The outlet temperature range is [0~740), the acceleration of speed increase is 24.58364mpm / min, and the acceleration of speed decrease is 29.50036mpm / min;

[0108] The outlet temperature range is [740~780), the acceleration of speed increase is 24.36799mpm / min, and the acceleration of speed decrease is 29.24159mpm / min;

[0109] The outlet temperature range is [780~820), the acceleration of speed increase is 23.48533mpm / min, and the acceleration of speed decrease is 28.18239mpm / min;

[0110] The outlet temperature range is [820~840), the acceleration of speed increase is 21.90624mpm / min, and the acceleration of speed decrease is 26.28749mpm / min;

[0111] The outlet temperature range is [840~860), the acceleration of speed increase is 19.92048mpm / min, and the acceleration of speed decrease is 23.90458mpm / min;

[0112] The outlet temperature range is [860~900), the acceleration of speed increase is 16.68526mpm / min, and the acceleration of speed decrease is 20.02231mpm / min.

[0113] When the thickness range of the strip is [0.8~1.2) and the width range is [750~990) and [990~1230), the strip running acceleration is set as follows:

[0114] The outlet temperature range is [0~740), the acceleration of speed increase is 24.58364mpm / min, and the acceleration of speed decrease is 29.50036mpm / min;

[0115] The outlet temperature range is [740~780), the acceleration of speed increase is 24.36799mpm / min, and the acceleration of speed decrease is 29.24159mpm / min;

[0116] The outlet temperature range is [780~820), the acceleration of speed increase is 23.48533mpm / min, and the acceleration of speed decrease is 28.18239mpm / min;

[0117] The outlet temperature range is [820~840), the acceleration of speed increase is 21.90624mpm / min, and the acceleration of speed decrease is 26.28749mpm / min;

[0118] The outlet temperature range is [840~860), the acceleration of speed increase is 19.92048mpm / min, and the acceleration of speed decrease is 23.90458mpm / min;

[0119] The outlet temperature range is [860~900), the acceleration of speed increase is 16.68526mpm / min, and the acceleration of speed decrease is 20.02231mpm / min.

[0120] When the thickness range of the strip is [0.8~1.2) and the width range is [1230~1460), [1460~1700), [1700~1930], the running acceleration of the strip is set as follows:

[0121] The outlet temperature range is [0~740), the acceleration of speed increase is 14.32723mpm / min, and the acceleration of speed decrease is 17.19267mpm / min;

[0122] The outlet temperature range is [740~780), the acceleration of speed increase is 14.11158mpm / min, and the acceleration of speed decrease is 16.93390mpm / min;

[0123] The outlet temperature range is [780~820), the acceleration of speed increase is 13.22892mpm / min, and the acceleration of speed decrease is 15.87470mpm / min;

[0124] The outlet temperature range is [820~840), the acceleration of speed increase is 11.64983mpm / min, and the acceleration of speed decrease is 13.97980mpm / min;

[0125] The outlet temperature range is [840~860), the acceleration of speed increase is 9.66407mpm / min, and the acceleration of speed decrease is 11.95689mpm / min;

[0126] The outlet temperature range is [860~900), the acceleration of speed increase is 8.07692mpm / min, and the acceleration of speed decrease is 9.69231mpm / min.

[0127] When the thickness range of the strip is [1.2~1.6) and the width range is [750~990), [990~1230), [1230~1460), the running acceleration of the strip is set as follows:

[0128] The outlet temperature range is [0~740), the acceleration of speed increase is 14.32723mpm / min, and the acceleration of speed decrease is 17.19267mpm / min;

[0129] The outlet temperature range is [740~780), the acceleration of speed increase is 14.11158mpm / min, and the acceleration of speed decrease is 16.93390mpm / min;

[0130] The outlet temperature range is [780~820), the acceleration of speed increase is 13.22892mpm / min, and the acceleration of speed decrease is 15.87470mpm / min;

[0131] The outlet temperature range is [820~840), the acceleration of speed increase is 11.64983mpm / min, and the acceleration of speed decrease is 13.97980mpm / min;

[0132] The outlet temperature range is [840~860), the acceleration of speed increase is 9.66407mpm / min, and the acceleration of speed decrease is 11.95689mpm / min;

[0133] The outlet temperature range is [860~900), the acceleration of speed increase is 8.07692mpm / min, and the acceleration of speed decrease is 9.69231mpm / min.

[0134] When the strip thickness range is [1.2~1.6) and the width range is [1460~1700) and [1700~1930], the strip running acceleration is set as follows:

[0135] The outlet temperature range is [0~740), the acceleration of speed increase is 7.03978mpm / min, and the acceleration of speed decrease is 8.44773mpm / min;

[0136] The outlet temperature range is [740~780), the acceleration of speed increase is 6.82413mpm / min, and the acceleration of speed decrease is 8.18896mpm / min;

[0137] The outlet temperature range is [780~820), the acceleration of speed increase is 5.94147mpm / min, and the acceleration of speed decrease is 7.12976mpm / min;

[0138] The outlet temperature range is [820~840), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min;

[0139] The outlet temperature range is [840~860), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min;

[0140] The outlet temperature range is [860~900), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min.

[0141] When the thickness range of the strip is [1.6~2.0) and the width range is [750~990), [990~1230), [1230~1460), [1460~1700), the running acceleration of the strip is set as follows:

[0142] The outlet temperature range is [0~740), the acceleration of speed increase is 7.03978mpm / min, and the acceleration of speed decrease is 8.44773mpm / min;

[0143] The outlet temperature range is [740~780), the acceleration of speed increase is 6.82413mpm / min, and the acceleration of speed decrease is 8.18896mpm / min;

[0144] The outlet temperature range is [780~820), the acceleration of speed increase is 5.94147mpm / min, and the acceleration of speed decrease is 7.12976mpm / min;

[0145] The outlet temperature range is [820~840), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min;

[0146] The outlet temperature range is [840~860), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min;

[0147] The outlet temperature range is [860~900), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min.

[0148] In the step 5), the specific values ​​directly assigned are: the acceleration for increasing speed is 3.79798 mpm / min, and the acceleration for decreasing speed is 4.55758 mpm / min.

[0149] It should be noted that the symbols "[" and "]" in the numerical range described in the present invention (including the strip thickness range, the strip width range, and the strip outlet temperature range) are closed interval symbols, indicating that the corresponding range contains the numerical endpoint, while the symbols "(" and ")" are open interval symbols, indicating that the corresponding range does not contain the numerical endpoint. For example: when the strip width range is [750~990), it means that the numerical range contains the endpoint value of 750mm, but does not contain the endpoint value of 990mm, that is, 750mm≤B<990mm.

[0150] The method for optimizing the running acceleration of galvanized heat-treated steel strip described in the present invention can be realized by an automatic control system, and the specific process is as follows:

[0151] (1) First, the strip width, strip thickness and strip outlet temperature are classified according to the set range in the host computer software program;

[0152] (2) The host computer software stores the classified data of the strip width, strip thickness and strip outlet temperature in the host computer database, file or software, and according to the strip running acceleration setting method of the present invention, stores the corresponding acceleration increase and acceleration decrease setting values ​​in the host computer database, file or software;

[0153] (3) After the classified data of the strip width range, strip thickness range and strip outlet temperature range are stored, they are indexed by the strip number, and the strip number is sent to the host computer software program through the PLC tracking system;

[0154] (4) The upper computer software automatically selects the classification data of the strip width range, strip thickness range and strip outlet temperature range according to the strip number;

[0155] (5) The upper computer software automatically queries and sets the acceleration value of the strip running according to the selected classification data;

[0156] (6) According to the real-time running status of the strip (speed-up running or speed-down running), the host computer sends the configured strip running acceleration value (speed-up acceleration value or speed-down acceleration value) to the on-site PLC controller;

[0157] (7) The PLC controller adjusts the acceleration of the strip conveyor roller through the speed regulating device according to the received strip running acceleration setting value.

[0158] The following embodiments are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0159] [Example]

[0160] In this embodiment, the strip thickness H is divided into N H Thickness ranges: [0.3~0.5), [0.5~0.8), [0.8~1.2), [1.2~1.6), [1.6~2.0), [2.0~2.6], unit is mm.

[0161] Strip outlet temperature T is divided into N T The outlet temperature ranges are: [0~740), [740~780), [780~820), [820~840), [840~860), [860~900], in °C.

[0162] Strip width B is divided into N B Width ranges: [750~990), [990~1230), [1230~1460), [1460~1700), [1700~1930], unit is mm.

[0163] The running acceleration of the strip during galvanizing heat treatment is set as shown in the following table:

[0164]

[0165]

[0166] Except as specified in the table, in other cases, the acceleration for increasing speed is set to 3.79798 mpm / min and the acceleration for decreasing speed is set to 4.55758 mpm / min.

[0167] In the actual production process, when the strip parameters and the strip outlet temperature meet the corresponding classification, the acceleration of the strip operation is optimized according to the corresponding acceleration of speed increase or speed decrease, such as:

[0168] The thickness of the strip is 0.6mm and the width is 1200mm, wherein the strip thickness (0.6mm) falls within the strip thickness range of [0.5~0.8) and the strip width (1200mm) falls within the strip width range of [990~1230). The strip outlet temperature at the heat treatment cooling section outlet is set to 460℃, which falls within the strip outlet temperature range of [0~740). At this time, if the strip conveyor roller corresponding to the cooling section is running at an increasing speed, its increasing acceleration is set to 24.58364mpm / min, and if the strip conveyor roller corresponding to the cooling section is running at a decreasing speed, its decreasing acceleration is set to 29.50036mpm / min.

[0169] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for optimizing the running acceleration of galvanized heat-treated strip steel, characterized in that: The steps include: 1) Divide the strip thickness H into N H Thickness range; 2) The strip outlet temperature T is divided into N T Outlet temperature range; 3) Set the strip running acceleration according to the strip thickness and strip outlet temperature; The running acceleration of the strip includes the acceleration of speed increase and the acceleration of speed decrease. The acceleration when the running speed of the strip increases is the acceleration of speed increase, and the acceleration when the running speed of the strip decreases is the acceleration of speed decrease. The units of the acceleration of speed increase and the acceleration of speed decrease are both mpm / min. Corresponding to each strip thickness range, when the strip outlet temperature increases, the speed-up acceleration and speed-down acceleration of the strip during operation both tend to decrease gradually, or remain unchanged within the set thickness range; 4) Divide the strip width B into N B The influence of strip width on strip running acceleration can be divided into the following three cases: a. Within the set strip thickness range, corresponding to all strip width ranges, only when the outlet temperature increases, the speed-up acceleration and speed-down acceleration of the strip during operation will gradually decrease, or remain unchanged within the set thickness range; b. Within the set strip width range, as the strip thickness increases and the outlet temperature rises, the speed-up acceleration and speed-down acceleration of the strip during operation tend to gradually decrease, or remain unchanged within the set thickness range; c. When the strip width increases, the strip thickness increases, and the outlet temperature rises, the speed-up acceleration and speed-down acceleration of the strip during operation tend to gradually decrease, or remain unchanged within the set thickness range; 5) After setting the corresponding strip running acceleration according to steps 1) to 4), directly assign values ​​to the strip running acceleration for situations not involved; In the step 1), the strip thickness H is divided into N H The specific thickness ranges are: [0.3~0.5), [0.5~0.8), [0.8~1.2), [1.2~1.6), [1.6~2.0), [2.0~2.6], in mm; In the step 2), the strip outlet temperature T is divided into N T The specific outlet temperature ranges are: [0~740), [740~780), [780~820), [820~840), [840~860), [860~900], in °C; In the step 4), the strip width B is divided into N B The specific width ranges are: [750~990), [990~1230), [1230~1460), [1460~1700), [1700~1930], in mm.

2. The method for optimizing the running acceleration of galvanized heat-treated steel strip according to claim 1, characterized in that: When the thickness range of the strip is [0.3~0.5), corresponding to all the width ranges of the strip, the running acceleration of the strip is set as follows: The outlet temperature range is [0~740), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min; The outlet temperature range is [740~780), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min; The outlet temperature range is [780~820), the acceleration of speed increase is 38.15199mpm / min, and the acceleration of speed decrease is 45.78239mpm / min; The outlet temperature range is [820~840), the acceleration of speed increase is 36.57291mpm / min, and the acceleration of speed decrease is 43.88749mpm / min; The outlet temperature range is [840~860), the acceleration of speed increase is 34.58715mpm / min, and the acceleration of speed decrease is 41.50458mpm / min; The outlet temperature range is [860~900), the acceleration of speed increase is 31.35192mpm / min, and the acceleration of speed decrease is 37.62231mpm / min.

3. The method for optimizing the running acceleration of galvanized heat-treated steel strip according to claim 1, characterized in that: When the strip thickness range is [0.5~0.8) and the width range is [750~990), the strip running acceleration is set as follows: The outlet temperature range is [0~740), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min; The outlet temperature range is [740~780), the acceleration of speed increase is 38.4mpm / min, and the acceleration of speed decrease is 46.08mpm / min; The outlet temperature range is [780~820), the acceleration of speed increase is 38.15199mpm / min, and the acceleration of speed decrease is 45.78239mpm / min; The outlet temperature range is [820~840), the acceleration of speed increase is 36.57291mpm / min, and the acceleration of speed decrease is 43.88749mpm / min; The outlet temperature range is [840~860), the acceleration of speed increase is 34.58715mpm / min, and the acceleration of speed decrease is 41.50458mpm / min; The outlet temperature range is [860~900), the acceleration of speed increase is 31.35192mpm / min, and the acceleration of speed decrease is 37.62231mpm / min.

4. The method for optimizing the running acceleration of galvanized heat-treated steel strip according to claim 1, characterized in that: When the thickness range of the strip is [0.5~0.8) and the width range is [990~1230), [1230~1460), [1460~1700), [1700~1930], the strip running acceleration is set as follows: The outlet temperature range is [0~740), the acceleration of speed increase is 24.58364mpm / min, and the acceleration of speed decrease is 29.50036mpm / min; The outlet temperature range is [740~780), the acceleration of speed increase is 24.36799mpm / min, and the acceleration of speed decrease is 29.24159mpm / min; The outlet temperature range is [780~820), the acceleration of speed increase is 23.48533mpm / min, and the acceleration of speed decrease is 28.18239mpm / min; The outlet temperature range is [820~840), the acceleration of speed increase is 21.90624mpm / min, and the acceleration of speed decrease is 26.28749mpm / min; The outlet temperature range is [840~860), the acceleration of speed increase is 19.92048mpm / min, and the acceleration of speed decrease is 23.90458mpm / min; The outlet temperature range is [860~900), the acceleration of speed increase is 16.68526mpm / min, and the acceleration of speed decrease is 20.02231mpm / min.

5. The method for optimizing the running acceleration of galvanized heat-treated steel strip according to claim 1, characterized in that: When the thickness range of the strip is [0.8~1.2) and the width range is [750~990) and [990~1230), the strip running acceleration is set as follows: The outlet temperature range is [0~740), the acceleration of speed increase is 24.58364mpm / min, and the acceleration of speed decrease is 29.50036mpm / min; The outlet temperature range is [740~780), the acceleration of speed increase is 24.36799mpm / min, and the acceleration of speed decrease is 29.24159mpm / min; The outlet temperature range is [780~820), the acceleration of speed increase is 23.48533mpm / min, and the acceleration of speed decrease is 28.18239mpm / min; The outlet temperature range is [820~840), the acceleration of speed increase is 21.90624mpm / min, and the acceleration of speed decrease is 26.28749mpm / min; The outlet temperature range is [840~860), the acceleration of speed increase is 19.92048mpm / min, and the acceleration of speed decrease is 23.90458mpm / min; The outlet temperature range is [860~900), the acceleration of speed increase is 16.68526mpm / min, and the acceleration of speed decrease is 20.02231mpm / min.

6. The method for optimizing the running acceleration of galvanized heat-treated steel strip according to claim 1, characterized in that: When the thickness range of the strip is [0.8~1.2) and the width range is [1230~1460), [1460~1700), [1700~1930], the running acceleration of the strip is set as follows: The outlet temperature range is [0~740), the acceleration of speed increase is 14.32723mpm / min, and the acceleration of speed decrease is 17.19267mpm / min; The outlet temperature range is [740~780), the acceleration of speed increase is 14.11158mpm / min, and the acceleration of speed decrease is 16.93390mpm / min; The outlet temperature range is [780~820), the acceleration of speed increase is 13.22892mpm / min, and the acceleration of speed decrease is 15.87470mpm / min; The outlet temperature range is [820~840), the acceleration of speed increase is 11.64983mpm / min, and the acceleration of speed decrease is 13.97980mpm / min; The outlet temperature range is [840~860), the acceleration of speed increase is 9.66407mpm / min, and the acceleration of speed decrease is 11.95689mpm / min; The outlet temperature range is [860~900), the acceleration of speed increase is 8.07692mpm / min, and the acceleration of speed decrease is 9.69231mpm / min.

7. The method for optimizing the running acceleration of galvanized heat-treated steel strip according to claim 1, characterized in that: When the strip thickness range is [1.2~1.6) and the width range is [750~990), [990~1230), [1230~1460), the strip running acceleration is set as follows: The outlet temperature range is [0~740), the acceleration of speed increase is 14.32723mpm / min, and the acceleration of speed decrease is 17.19267mpm / min; The outlet temperature range is [740~780), the acceleration of speed increase is 14.11158mpm / min, and the acceleration of speed decrease is 16.93390mpm / min; The outlet temperature range is [780~820), the acceleration of speed increase is 13.22892mpm / min, and the acceleration of speed decrease is 15.87470mpm / min; The outlet temperature range is [820~840), the acceleration of speed increase is 11.64983mpm / min, and the acceleration of speed decrease is 13.97980mpm / min; The outlet temperature range is [840~860), the acceleration of speed increase is 9.66407mpm / min, and the acceleration of speed decrease is 11.95689mpm / min; The outlet temperature range is [860~900), the acceleration of speed increase is 8.07692mpm / min, and the acceleration of speed decrease is 9.69231mpm / min.

8. The method for optimizing the running acceleration of galvanized heat-treated steel strip according to claim 1, characterized in that: When the thickness range of the strip is [1.2~1.6) and the width range is [1460~1700) and [1700~1930], the running acceleration of the strip is set as follows: The outlet temperature range is [0~740), the acceleration of speed increase is 7.03978mpm / min, and the acceleration of speed decrease is 8.44773mpm / min; The outlet temperature range is [740~780), the acceleration of speed increase is 6.82413mpm / min, and the acceleration of speed decrease is 8.18896mpm / min; The outlet temperature range is [780~820), the acceleration of speed increase is 5.94147mpm / min, and the acceleration of speed decrease is 7.12976mpm / min; The outlet temperature range is [820~840), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min; The outlet temperature range is [840~860), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min; The outlet temperature range is [860~900), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min.

9. The method for optimizing the running acceleration of galvanized heat-treated steel strip according to claim 1, characterized in that: When the thickness range of the strip is [1.6~2.0) and the width range is [750~990), [990~1230), [1230~1460), [1460~1700), the running acceleration of the strip is set as follows: The outlet temperature range is [0~740), the acceleration of speed increase is 7.03978mpm / min, and the acceleration of speed decrease is 8.44773mpm / min; The outlet temperature range is [740~780), the acceleration of speed increase is 6.82413mpm / min, and the acceleration of speed decrease is 8.18896mpm / min; The outlet temperature range is [780~820), the acceleration of speed increase is 5.94147mpm / min, and the acceleration of speed decrease is 7.12976mpm / min; The outlet temperature range is [820~840), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min; The outlet temperature range is [840~860), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min; The outlet temperature range is [860~900), the acceleration of speed increase is 5.46689mpm / min, and the acceleration of speed decrease is 6.56027mpm / min.

10. The method for optimizing the running acceleration of galvanized heat-treated steel strip according to claim 1, characterized in that: In the step 5), the specific values ​​directly assigned are: the acceleration for increasing speed is 3.79798 mpm / min, and the acceleration for decreasing speed is 4.55758 mpm / min.

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