Method, system and equipment for improving necking of head end of steel coil and storage medium

Abstract

The invention discloses a method, system and equipment for improving necking of the head end of a steel coil and a storage medium, belongs to the technical field of steel coil production, and solves the technical problem of insufficient local width caused by slight necking of the width of a steel belt in the tension establishing process in hot rolling production at present. The method comprises the following steps: determining a necking compensation starting position and a necking compensation length of a steel strip at a vertical roll at the last pass of rough rolling according to the necking starting position and the necking length of the steel strip at a finish rolling outlet; the necking compensation width is determined according to the finish rolling target thickness and the finish rolling target thickness width of the steel strip; and according to the necking compensation starting position, the necking compensation length and the necking compensation width, vertical roll work of the last pass of rough rolling is controlled, and the steel strip generates a compensation area used for compensating necking. According to the invention, the width of the steel strip is pre-compensated at the vertical roll at the last pass of rough rolling so as to counteract part or all necking, and the width qualification rate is improved, so that the utilization rate of the steel strip is improved, and the resource waste is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of steel coil production, and more specifically, to a method, system, equipment and storage medium for improving the necking of the head end of a steel coil. Background Art

[0002] In hot rolling production, the strip width may be slightly necked during the process of establishing tension, resulting in local width shortage. Neck shrinkage is prone to occur when the strip is threaded between finishing stations and when the tension is established during coiling (F7 and DC). Figure 1 As shown, when the steel strip 1 is threaded through the finishing station 2 and tension is established in the coiler 3, the necking region 5 of the steel strip 1 is located between the flying shear 4 and the finishing station 2. Taking 304 as an example, local necking of the steel strip width is prone to occur at a position 20 to 80 m from the head end, and no necking occurs in the rest of the steel strip.

[0003] The width of the necked portion of the steel belt is unqualified, and the necked portion needs to be cut off during the actual use of the steel belt, resulting in a waste of resources. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. One purpose of the present invention is to provide a method for improving the necking of the head end of a steel coil.

[0005] The second object of the present invention is to provide a system for improving the necking of the head end of a steel coil.

[0006] A third object of the present invention is to provide a computer device.

[0007] A fourth objective of the present invention is to provide a computer storage medium.

[0008] In order to achieve the above-mentioned purpose one, the present invention provides a method for improving the necking of the head end of a steel coil, determining the necking compensation starting position and necking compensation length of the steel strip at the last pass vertical roller of rough rolling according to the necking starting position and necking length of the steel strip at the finish rolling exit; determining the necking compensation width according to the finish rolling target thickness and the finish rolling target thickness width of the steel strip; controlling the operation of the last pass vertical roller of rough rolling according to the necking compensation starting position, necking compensation length and necking compensation width, so that the steel strip generates a compensation area for compensating for necking.

[0009] As a further improvement, the necking compensation starting position and the necking compensation length are determined as follows:

[0010]

[0011] in, is the necking start position, is the necking length, is the starting position for necking compensation, is the necking compensation length, h FM h is the thickness of the steel strip at the finish rolling exit, RM It is the thickness of the steel strip at the vertical roll in the last pass of rough rolling.

[0012] Furthermore, a necking compensation table is established, and the necking compensation table is classified and set according to the type of steel, necking start position, necking length, finishing target width, finishing target thickness, and necking compensation width; in production, the necking compensation table is queried according to the steel type, finishing target width, and finishing target thickness of the steel strip to obtain the necking start position, necking length, and necking compensation width.

[0013] Furthermore, the necking start position and the necking length are obtained by detection after production with different finishing target widths or finishing target thicknesses according to the type of steel.

[0014] Furthermore, the necking compensation width is obtained by testing according to the type of steel with different finishing target widths or finishing target thicknesses.

[0015] Furthermore, the compensation area and the steel strip are transitioned by setting a slope or by an arc.

[0016] Furthermore, the vertical rolls in the last pass of rough rolling are symmetrically opened to both sides to compensate for necking.

[0017] In order to achieve the above-mentioned second objective, a system for improving the necking of the head end of a steel coil comprises:

[0018] A calculation module is used to determine the necking compensation starting position and necking compensation length of the steel strip at the vertical roll of the last pass of rough rolling according to the necking starting position and necking length of the steel strip at the outlet of finishing rolling;

[0019] A query module, used for determining the necking compensation width according to the finishing target thickness and finishing target thickness width of the steel strip;

[0020] The control module is used to control the operation of the vertical rollers in the last pass of rough rolling according to the necking compensation starting position, necking compensation length and necking compensation width, so that the steel strip generates a compensation area for compensating necking.

[0021] In order to achieve the third objective above, the present invention provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the above-mentioned method for improving the necking of the head end of a steel coil when executing the computer program.

[0022] In order to achieve the fourth objective above, the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for improving the necking of the head end of a steel coil is implemented.

[0023] Beneficial Effects

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The present invention pre-compensates the width of the steel strip at the vertical roll of the last rough rolling pass to offset part or all of the necking, thereby improving the width qualification rate, thereby improving the utilization rate of the steel strip and reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the steel strip compensation area in the present invention;

[0028] Figure 3 This is a diagram showing the effect of applying the present invention.

[0029] Among them: 1-steel strip, 2-finishing rolling station, 3-coiler, 4-flying shear, 5-necking area, 6-last vertical roller of rough rolling, 7-compensation area. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0031] See also Figure 1 to Figure 3 A method for improving the necking of the head end of a steel coil, which comprises determining the necking compensation starting position and the necking compensation length of the steel strip 1 at the last rough rolling pass vertical roller 6 according to the necking starting position and the necking length of the steel strip 1 at the finishing exit; determining the necking compensation width according to the finishing target thickness and the finishing target thickness width of the steel strip 1; and controlling the operation of the last rough rolling pass vertical roller 6 according to the necking compensation starting position, the necking compensation length and the necking compensation width, so that the steel strip 1 generates a compensation area 7 for compensating for necking.

[0032] like Figure 2 As shown, the width of the compensation area 7 is greater than the width of the steel strip 1 to offset part or all of the necking, thereby improving the width qualification rate of the steel strip 1, thereby increasing the utilization rate of the steel strip and reducing resource waste.

[0033] The starting position and length of the necking compensation are determined as follows:

[0034]

[0035] in, is the necking start position, is the necking length, is the starting position for necking compensation, is the necking compensation length, h FMh is the thickness of the steel strip 1 at the finish rolling exit, RM It is the thickness of the steel strip 1 at the vertical roller 6 in the last pass of rough rolling.

[0036] A necking compensation table is established, and the necking compensation table is classified and set according to the steel type, necking start position, necking length, finishing target width, finishing target thickness, and necking compensation width; in production, the necking compensation table is queried according to the steel type, finishing target width, and finishing target thickness of the steel strip 1 to obtain the necking start position, necking length, and necking compensation width.

[0037] The necking start position and necking length are obtained by post-production testing with different finishing target widths or finishing target thicknesses according to the steel type. Preferably, the necking start position and necking length are both average values ​​of multiple production tests.

[0038] The necking compensation width is obtained by testing with different finishing target widths or finishing target thicknesses according to the type of steel.

[0039] The compensation area 7 and the steel strip 1 are transitioned by setting a slope or by an arc, and the slope is set to 45° to 60°, so that the transition of the necking area is smoother.

[0040] The vertical rollers 6 of the last rough rolling pass are symmetrically opened to both sides for necking compensation, that is, the two vertical rollers move to both sides at the same time by 1\2 necking compensation width

[0041] A system for improving the necking of the head end of a steel coil, comprising:

[0042] A calculation module, for determining the necking compensation starting position and necking compensation length of the steel strip 1 at the vertical roller 6 of the last pass of rough rolling according to the necking starting position and necking length of the steel strip 1 at the finish rolling exit;

[0043] A query module, used to determine the necking compensation width according to the finishing target thickness and finishing target thickness width of the steel strip 1;

[0044] The control module is used to control the operation of the vertical roller 6 of the last rough rolling pass according to the necking compensation starting position, necking compensation length and necking compensation width, so that the steel strip 1 generates a compensation area 7 for compensating necking.

[0045] A computer device includes a memory and a processor. The memory stores a computer program. When the processor executes the computer program, the method for improving the necking of the head end of a steel coil is implemented.

[0046] A computer-readable storage medium stores a computer program, which implements the above-mentioned method for improving the necking of the head end of a steel coil when the computer program is executed by a processor.

[0047] Taking 304 as an example, the practical application effect of the present invention is as follows Figure 3 As shown, the width yield is improved by using the necking compensation function of the present invention.

[0048] An average of 4 per month, the price per ton of steel is 13,700, the loss of the second level is reduced by 20%, and the unit weight is about 20 tons;

[0049] Estimated monthly benefit =

[0050] Improved number of particles × reduced second-level ton steel loss × steel coil weight = 4 × 13700 × 20% × 20 = 219.2 thousand (RMB).

[0051] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A method for improving the necking of the head end of a steel coil, characterized in that: The necking compensation starting position and necking compensation length of the steel strip (1) at the last rough rolling pass vertical roller (6) are determined according to the necking starting position and necking length of the steel strip (1) at the finishing exit; the necking compensation width is determined according to the finishing target thickness and the finishing target thickness width of the steel strip (1); and the operation of the last rough rolling pass vertical roller (6) is controlled according to the necking compensation starting position, necking compensation length and necking compensation width, so that the steel strip (1) generates a compensation area (7) for compensating for necking.

2. A method for improving the necking of the head end of a steel coil according to claim 1, characterized in that: The necking compensation starting position and the necking compensation length are determined as follows: in, is the necking start position, is the necking length, is the starting position for necking compensation, is the necking compensation length, h FM is the thickness of the steel strip (1) at the outlet of the finishing rolling mill, h RM It is the thickness of the steel strip (1) at the vertical roller (6) at the last pass of rough rolling.

3. A method for improving the necking of the steel coil head end according to claim 1, characterized in that: A necking compensation table is established, wherein the necking compensation table is classified and set according to the steel type, necking start position, necking length, finishing target width, finishing target thickness, and necking compensation width; in production, the necking compensation table is queried according to the steel type, finishing target width, and finishing target thickness of the steel strip (1) to obtain the necking start position, necking length, and necking compensation width.

4. A method for improving the necking of the steel coil head end according to claim 1, characterized in that: The necking start position and necking length are obtained by testing after production with different finishing target widths or finishing target thicknesses according to the type of steel.

5. The method for improving the necking of the steel coil head end according to claim 1, characterized in that: The necking compensation width is obtained by testing according to the type of steel with different finishing target widths or finishing target thicknesses.

6. A method for improving the necking of the head end of a steel coil according to claim 1, characterized in that: The compensation area (7) and the steel strip (1) are transitioned by setting a slope or by an arc.

7. A method for improving the necking of the head end of a steel coil according to claim 1, characterized in that: The vertical rollers (6) of the last rough rolling pass are symmetrically opened to both sides to compensate for necking.

8. A system for improving the necking of the head end of a steel coil, characterized in that: include: A calculation module, for determining the necking compensation starting position and necking compensation length of the steel strip (1) at the vertical roller (6) of the last pass of rough rolling according to the necking starting position and necking length of the steel strip (1) at the finish rolling exit; A query module, used for determining a necking compensation width according to a finishing target thickness and a finishing target thickness width of the steel strip (1); A control module is used to control the operation of the vertical roller (6) of the last rough rolling pass according to the necking compensation starting position, the necking compensation length and the necking compensation width, so that the steel strip (1) generates a compensation area (7) for compensating for necking.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the method for improving the necking of the head end of a steel coil as described in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, a method for improving the necking of the head end of a steel coil as described in any one of claims 1 to 7 is implemented.

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