CN111530932A - Automatic control method for reducing shearing amount of flying shear of strip steel - Google Patents
Automatic control method for reducing shearing amount of flying shear of strip steel Download PDFInfo
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- CN111530932A CN111530932A CN202010343456.3A CN202010343456A CN111530932A CN 111530932 A CN111530932 A CN 111530932A CN 202010343456 A CN202010343456 A CN 202010343456A CN 111530932 A CN111530932 A CN 111530932A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
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Abstract
The invention discloses an automatic control method for reducing the shearing quantity of a flying shear of strip steel, which comprises the following steps: s1, formulating a corresponding shear volume control regulation table according to the finished product thickness, side pressure and width of the strip steel with different specifications; s2, according to the thickness, side pressure and width of the finished product of the currently produced strip steel, finding out the corresponding shearing amount in the shearing amount control regulation table, and according to the shearing amount, controlling the flying shear shearing of the head and the tail of the currently produced strip steel. According to the automatic control method for reducing the shearing quantity of the strip steel flying shears, provided by the invention, the shearing quantity control rule table is established by hierarchically classifying the influence points (the thickness quantity, the side pressure quantity and the width quantity) influencing the shearing quantity of the flying shears, so that full-automatic fine shearing is realized, and the material waste caused by the traditional fixed shearing and the labor waste caused by manual wire-drawing shearing are improved.
Description
Technical Field
The invention belongs to the technical field of hot rolling and shearing of strip steel, and particularly relates to an automatic control method for reducing the shearing quantity of strip steel flying shears.
Background
In the production process of a traditional hot-rolled strip steel production line, flying shear shearing of strip steel is mainly processed by two modes of manually setting fixed shearing quantity shearing of a head and a tail or manually pulling and shearing a head and a tail for forming. The manual setting of the head and tail fixed shearing amount generally sets the fixed shearing amount at the head of the strip steel, such as 250mm, the manual setting of the tail fixed shearing amount, such as 300mm, the manual setting of the fixed shearing amount is simple in operation, but the shearing amount is often too large, so that the cutting loss is easily caused. The mode of head and tail forming and manual stay wire shearing needs to arrange a post worker specially to carry out manual stay wire shearing operation, is not intelligent and accurate, greatly wastes manpower and material resources, and reduces the rolling wire yield.
The above discussion is intended to introduce the reader to various aspects of art that may be related to various aspects of the present invention, which are described and/or claimed below, and is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present invention, and is therefore to be understood in this light, and not as an admission of prior art.
Disclosure of Invention
In order to solve the technical problem, the invention provides an automatic control method for reducing the shearing quantity of a flying shear of strip steel.
The purpose of the invention is realized by the following technical scheme: the automatic control method for reducing the shearing quantity of the flying shear of the strip steel comprises the following steps:
s1, formulating a corresponding shear volume control regulation table according to the finished product thickness, side pressure and width of the strip steel with different specifications;
s2, according to the thickness, side pressure and width of the finished product of the currently produced strip steel, finding out the corresponding shearing amount in the shearing amount control regulation table, and according to the shearing amount, controlling the flying shear shearing of the head and the tail of the currently produced strip steel.
As a further improvement, in step S1, when the shear amount control rule table is prepared, the shear amount is larger as the finished thickness amount is smaller, and the shear amount is smaller as the finished thickness amount is larger.
As a further improvement, in step S1, when the shear amount control rule table is prepared, the shear amount is larger as the side pressure is larger, and the shear amount is smaller as the side pressure is smaller.
As a further improvement, in step S1, when the cutting amount control rule table is prepared, the cutting amount is smaller as the finished product width amount is larger, and the cutting amount is larger as the finished product width amount is smaller.
As a further improvement, in step S1, when the shear amount control rule table is prepared, the finished product thickness amount is divided into 27 layers, the side pressure amount is divided into 14 layers, and the finished product width amount is divided into 7 layers, the head and tail shear percentage, the head and tail additional shear amount, and the head and tail maximum shear amount are set according to the layer of the finished product thickness amount, the layer of the side pressure amount, and the layer of the finished product width amount, and the shear amount of the strip steel of the corresponding specification is obtained by comprehensive calculation according to the head and tail shear percentage, the head and tail additional shear amount, and the head and tail maximum shear amount.
As a further improvement, the method further comprises a step S3 of updating the shearing amount of the strip steel with the corresponding specification in the strip steel shearing amount control regulation table according to the flying shear shearing effect of the currently produced strip steel.
The invention provides an automatic control method for reducing the shearing quantity of a flying shear of strip steel, which comprises the following steps: s1, formulating a corresponding shear volume control regulation table according to the finished product thickness, side pressure and width of the strip steel with different specifications; s2, according to the thickness, side pressure and width of the finished product of the currently produced strip steel, finding out the corresponding shearing amount in the shearing amount control regulation table, and according to the shearing amount, controlling the flying shear shearing of the head and the tail of the currently produced strip steel. The automatic control method for reducing the shearing amount of the flying shears of the strip steel establishes a shearing amount control rule table for the dependent variables (the thickness amount, the side pressure amount and the width amount) which affect the shearing amount of the flying shears in a layered classification manner, realizes full-automatic fine shearing, and improves material waste caused by the traditional fixed shearing and manpower waste caused by manual wire-drawing shearing.
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The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a plot of yield versus time for a hot strip rolling line of a type to which the present invention is applied.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail below, and it should be noted that the embodiments of the present application and features of the embodiments may be combined with each other without conflict.
The core of the invention is to provide an automatic control method for reducing the flying shear amount of the strip steel, which analyzes the actual shearing condition of the flying shear of the strip steel of the traditional hot rolling production line, obtains the dependent variables (the thickness amount, the side pressure amount and the width amount) influencing the irregular shape of the head and the tail of the strip steel, establishes an automatic shearing control rule table according to the three parameters of the thickness, the side pressure amount and the width amount of the finished product strip steel, and realizes the full-automatic fine shearing, thereby optimizing the shearing amount, ensuring the clean shearing of the head and the tail of the strip steel, ensuring the stability, reducing the shearing amount, ensuring the accurate shearing of the strip steel, increasing the yield of the production line and saving the cost.
The embodiment of the invention provides an automatic control method for reducing the shearing quantity of a flying shear of strip steel, which comprises the following steps:
s1, formulating a corresponding shear volume control regulation table according to the finished product thickness, side pressure and width of the strip steel with different specifications; because the irregular shapes of the head and the tail of the strip steel are mainly influenced by the thickness, the side pressure and the width of the finished product of the strip steel, different shearing quantities can be set according to different dependent variables influencing the irregular shapes of the head and the tail of the strip steel, so that the stability is ensured, the small shearing quantity is ensured, and the traditional solidification shearing and manual wire pulling shearing are replaced.
S2, according to the thickness, side pressure and width of the finished product of the currently produced strip steel, finding out the corresponding shearing amount in the shearing amount control regulation table, and according to the shearing amount, controlling the flying shear shearing of the head and the tail of the currently produced strip steel.
As a further preferred embodiment, in step S1, when the shear amount control rule table is prepared, the smaller the thickness of the finished product, the larger the shear amount, because the thinner the thickness, the shear amount needs to be increased to ensure that the cold spots and irregular shapes on the head are sheared cleanly; when the product thickness is larger, the shearing amount is smaller because the thickness is increased and the rolling is stable, the shearing amount can be reduced to increase the yield of the production line.
In a more preferred embodiment, when the shear amount control rule table is prepared in step S1, the shear amount is larger as the side pressure is larger, and the shear amount is smaller as the side pressure is smaller. The thickness control is further subdivided, and the larger the lateral pressure is, the longer the irregular shapes of the head and the tail are. Therefore, the smaller the side pressure is, the less the shearing amount is, so as to increase the yield of the production line; the larger the side pressure is, the larger the shearing amount is, so as to ensure that the irregular shape is sheared cleanly.
In a further preferred embodiment, when the cutting amount control rule table is prepared in step S1, the cutting amount is smaller as the finished width amount is larger, and the cutting amount is larger as the finished width amount is smaller. The thickness and the side pressure are further subdivided on the basis of control, the larger the width of a finished product is, the smaller the irregular shape is, and the shearing quantity can be reduced so as to increase the yield of a production line; the smaller the width of the finished product is, the larger the irregular shape is, and the shearing amount needs to be increased so as to ensure that the irregular shape is sheared cleanly.
In a further preferred embodiment, when the shear amount control rule table is prepared in step S1, the finished product thickness amount is divided into 27 layers, the side pressure amount is divided into 14 layers, and the finished product width amount is divided into 7 layers, each of which is shown in the following table:
as a further preferred embodiment, as shown in the above table, when dividing the thickness of the finished product into different layers, the different thicknesses can be classified from small to large, and the data can be simplified according to the set range, so as to facilitate the cutting according to the set range. For example, the thickness of the finished product is an infinite number of thickness values between 2.5 mm and 4.0mm, and the cutting is convenient to identify after the product is reduced to the 3 rd category.
Setting head and tail shearing percentage, head and tail additional shearing amount and head and tail maximum shearing amount according to the layer level of the thickness amount of the finished product, the layer level of the side pressure amount and the layer level of the width amount of the finished product, and comprehensively calculating the shearing amount of the strip steel with the corresponding specification according to the head and tail shearing percentage, the head and tail additional shearing amount and the head and tail maximum shearing amount, thereby forming a shearing amount control regulation table as follows:
the shear volume control regulation table is compiled as follows:
(1) the larger the finished thickness measurement level (1 → 27), the smaller the amount of cut, so the smaller the head-to-tail cut percentage headblockpercentage/taillbandyphercent (example 99% → 95%), the smaller the head-to-tail additional cut amount headcutpwercent/tailcutpwercent/tailstailoffset (example 200mm → 0).
(2) The larger the side pressure layer (1 → 14), the larger the shear amount, and therefore the larger the head-to-tail shear percentage headbodippercent/tailebbodippercent (example 90% → 99%), the larger the head-to-tail additional shear amount headcutpwercent/tailcutpwercent/tailstoiloffset (example 0 → 200 mm).
(3) The larger the finished width layer (1 → 7), the smaller the amount of shear, so the smaller the head-to-tail shear percentage headblockPercent/taillbandPercent (example 99% → 95%), the smaller the head-to-tail additional shear amount headCutPercent/tailCutPercent/tailtTalloOffset (example 200mm → 0).
In a further preferred embodiment, the method further comprises step S3, updating the shearing amount of the strip steel with the corresponding specification in the strip steel shearing amount control regulation table according to the flying shear shearing effect of the currently produced strip steel. Therefore, parameters can be modified at any time according to actual requirements on site, accurate shearing and automatic control are achieved, and shearing can be continuously improved and optimized.
As shown in figure 1, when a 2250-type hot-rolled strip is produced on a hot-rolled strip production line of Bao steel, by adopting the automatic control method for reducing the flying shear shearing amount of the strip according to the embodiment of the invention, the flying shear shearing amount is automatically controlled by dividing the strip according to the thickness layer, the side pressure layer and the width layer, compared with the traditional mode, the shearing loss caused by flying shear shearing is gradually reduced from 0.53% to 0.45%, the yield of a rolled line is improved by 0.08%, and the cutting loss rate of the hot-rolled strip is greatly reduced.
In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore should not be construed as limiting the scope of the present invention.
In conclusion, although the present invention has been described with reference to the preferred embodiments, it should be noted that, although various changes and modifications may be made by those skilled in the art, they should be included in the scope of the present invention unless they depart from the scope of the present invention.
Claims (6)
1. An automatic control method for reducing the shearing quantity of a flying shear of strip steel is characterized by comprising the following steps:
s1, formulating a corresponding shear volume control regulation table according to the finished product thickness, side pressure and width of the strip steel with different specifications;
s2, according to the thickness, side pressure and width of the finished product of the currently produced strip steel, finding out the corresponding shearing amount in the shearing amount control regulation table, and according to the shearing amount, controlling the flying shear shearing of the head and the tail of the currently produced strip steel.
2. The automatic control method for reducing flying shear of strip steel as claimed in claim 1, wherein in step S1, when the shear control rule table is prepared, the smaller the thickness of the finished product, the larger the shear, the larger the thickness of the finished product, and the smaller the shear.
3. The automatic control method for reducing the flying shear volume of strip steel as claimed in claim 2, wherein in step S1, when the shear volume control schedule table is prepared, the shear volume is larger as the side pressure is larger, and the shear volume is smaller as the side pressure is smaller.
4. The automatic control method for reducing flying shear of strip steel as claimed in claim 3, wherein in step S1, when the shear control rule table is prepared, the larger the width of the finished product, the smaller the shear amount, and the smaller the width of the finished product, the larger the shear amount.
5. The automatic control method for reducing the flying shear volume of strip steel according to any one of claims 1 to 4, wherein in step S1, when a shear volume control regulation table is prepared, the thickness volume of the finished product is divided into 27 layers, the lateral pressure volume is divided into 14 layers, and the width volume of the finished product is divided into 7 layers, the percentage of head-to-tail shear, the additional shear volume of head-to-tail, and the maximum shear volume of head-to-tail are set according to the layer of the thickness volume of the finished product, the layer of the lateral pressure volume, and the layer of the width volume of the finished product, and the shear volume of strip steel of corresponding specification is obtained by comprehensive calculation according to the percentage of head-to-tail shear, the additional shear volume of head-to-tail, and the maximum.
6. The automatic control method for reducing flying shear of strip steel of claim 5, further comprising step S3, updating the shear quantity of the strip steel of the corresponding specification in the strip steel shear quantity control regulation table according to the flying shear effect of the currently produced strip steel.
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