Method, device and medium for setting protection of tilt pressure of multi-roller straightening machine

Abstract

The present invention provides a method, device and medium for setting protection of tilt pressure of a multi-roll straightening machine, the method comprising: S1, determining the upper working roll R according to the working roll diameter D, the thickness h of the plate and strip and the predetermined safety distance δ u and lower working roll R d The range of the center distance m of the rollers that are not pressed; S2, according to the tilt angle θ of the upper roller box around its own geometric center point O when the straightening machine is tilted and pressed down, the distance from point O to R u The roll R is calculated based on the distance R from the center point A, the half roll spacing t, the overlap k and the angle α between OA and the common tangent line of the upper and lower working rolls. u and Roller R d The roller center distance m is obtained; S3, based on the minimum value of m and the calculation formula for m in step S2, obtains a protection value for the work roll reduction. The protection value for the work roll reduction is the reduction overlap k corresponding to the minimum value of m. This technical solution prevents the upper and lower work rolls of the straightening machine from being pressed together, thereby protecting the straightening machine equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of strip finishing, and in particular to a protection setting method, device and storage medium for tilting and pressing down of a plate and strip multi-roller straightening machine. Background Art

[0002] The multi-roller straightening machine has a large pressing force, and the pressing amount of various types and specifications is different. Failure to set the corresponding position protection for the straightening machine's pressing device will be very dangerous and often cause equipment damage. Summary of the Invention

[0003] An embodiment of the present invention provides a protection setting method, device and medium for the tilt depression of a multi-roller straightening machine. By determining the protection value of the working roll depression amount, the upper and lower working rolls of the straightening machine can be prevented from being pressed together, thereby achieving protection of the straightening machine equipment.

[0004] In order to achieve the above object, on the one hand, a protection setting method for tilting down of a multi-roller straightening machine is provided, comprising:

[0005] S1, determine the upper working roll R with the closest roll center distance according to the working roll diameter D of the straightening machine, the thickness h of the plate strip to be processed and the predetermined safety distance δ u and lower working roll R d The range of the center distance m of the rollers that are not pressed, wherein m≥D+h+δ; in this step, the plate and strip include: plate steel or strip steel;

[0006] S2, according to the tilt angle θ of the upper roll box around its own swing geometric center point O when the straightening machine is tilted and pressed down, the distance from the O point to the upper working roll R u The upper working roll R is calculated based on the distance R from the center point A, the half roll spacing t, the overlap k of the upper and lower working rolls, and the angle α between OA and the common tangent line of the upper and lower working rolls. u and the lower working roll R d The roller center distance m, wherein the press overlap amount k is determined by the common tangent and the given press target value of the straightening machine, wherein:

[0007]

[0008] S3, according to the minimum value of m determined in step S1 and the calculation formula of m in step S2, obtaining a protection value of the working roll reduction amount, wherein the protection value of the working roll reduction amount is the reduction overlap amount k corresponding to the minimum value of m.

[0009] Preferably, the protection setting method further comprises, after step S3:

[0010] S4, determine the protection value k' of the straightening machine inlet pressure reduction device according to the protection value of the work roll pressure reduction amount, the geometric distance S1 between the upper first work roll and the upper last work roll, and the geometric distance S2 between the inlet pressure reduction device and the outlet pressure reduction device, wherein:

[0011]

[0012] Preferably, in the protection setting method, the protection value k′ of the inlet pressure reduction device is the maximum pressure reduction limit value of the inlet pressure reduction device of the straightening machine.

[0013] Preferably, in the protection setting method, the pressing device is a pressing cylinder.

[0014] Preferably, the protection setting method, the upper working roll R u is the upper working roll, the lower working roll R d It is the second working roll after the first working roll in the lower working roll.

[0015] Preferably, in the protection setting method, the depression overlap amount k is calculated by calculating the distance from the common tangent line to the given depression target value, wherein k=0-the given depression target value.

[0016] On the other hand, a protection setting device for tilting and pressing down a multi-roller straightening machine is provided, comprising a memory and a processor, wherein the memory stores at least one program, and the at least one program is executed by the processor to implement any of the protection setting methods described above.

[0017] On the other hand, a computer-readable storage medium is provided, wherein the storage medium stores at least one program, and the at least one program is executed by a processor to implement any of the protection setting methods described above.

[0018] The above technical solution has the following technical effects:

[0019] By utilizing the technical solution of the embodiment of the present invention, a straightening machine with a multi-roller inclined down-working mode can set corresponding protection values ​​for each type of plate steel or strip steel in each straightening process according to basic parameters such as the thickness of the plate steel or strip steel, the diameter of the straightening machine working roll, and the inclined down-pressing angle. By setting protection values ​​for each down-pressing action in the control program, the upper and lower working rolls of the straightening machine can be effectively protected from being pressed together, thereby protecting the straightening machine equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic flow chart of a method for setting protection for tilting and pressing down of a multi-roller straightening machine according to an embodiment of the present invention;

[0021] Figure 2 A schematic flow chart of a method for setting protection for tilting and pressing down of a multi-roller straightening machine according to another embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the multi-roller straightening machine in state 1 when not tilted and pressed down;

[0023] Figure 3-1 for Figure 3 A partial enlarged view of

[0024] Figure 4 Schematic diagram of state 2 when the multi-roller straightening machine is tilted and pressed down to the common tangent position of the rollers;

[0025] Figure 4-1 for Figure 4 A partial enlarged view of

[0026] Figure 5 Schematic diagram of state 3 when the multi-roller straightening machine is tilted and pressed down from the roller common tangent position to a given pressing target value, i.e., the pressing set value;

[0027] Figure 6 This is a structural schematic diagram of a protection setting device for tilting and pressing down of a multi-roller straightening machine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the present disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, one of ordinary skill in the art will understand other possible embodiments and the advantages of the present invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0029] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0030] Example 1:

[0031] Figure 1 FIG. 1 is a flow chart of a method for setting protection of a multi-roller straightening machine under tilt pressure according to an embodiment of the present invention. Figure 1 The protection setting method for the tilt pressure of the multi-roller straightening machine of this embodiment includes the following steps:

[0032] S1, determine the upper working roll R with the closest roll center distance according to the working roll diameter D of the straightening machine, the thickness h of the plate strip to be processed and the predetermined safety distance δ u and lower working roll R d The range of the center distance m of the rollers that do not press against each other, where m ≥ D + h + δ;

[0033] S2, according to the tilt angle θ of the upper roll box around its own geometric center point O when the straightening machine is tilted and pressed down, the angle from point O to the upper working roll R u The upper working roll R is calculated based on the distance R from the center point A, the half roll spacing t, the overlap k of the upper and lower working rolls, and the angle α between OA and the common tangent line of the upper and lower working rolls. u and lower working roll R d The roller center distance m, where the overlap k is determined by the common tangent and the given target reduction value of the straightening machine, where:

[0034]

[0035] S3. According to the minimum value of m determined in step S1 and the calculation formula of m in step S2, a protection value of the working roll reduction amount is obtained. The protection value of the working roll reduction amount is the reduction overlap amount k corresponding to the minimum value of m.

[0036] In the protection setting method of an embodiment of the present invention, the overlap k is determined by the common tangent and the given target reduction value of the straightener, also known as the given reduction value. This calculation method for k does not consider the thickness of the strip, where k = 0 - given target reduction value. For example, if the given target reduction value is 2 mm, k is 0 - 2 = -2, with the position of the common tangent as 0. Subsequently, when the strip is thicker, the given target reduction value may become negative.

[0037] In a specific implementation, the pressing device is a pressing cylinder.

[0038] Example 2:

[0039] Figure 2 FIG. 1 is a flow chart of a protection method according to another embodiment of the present invention. Figure 2 The protection setting method of this embodiment is based on the embodiment 1, and further includes after step S3:

[0040] S4, determine the protection value k' of the straightening machine inlet pressure device according to the protection value of the work roll pressure reduction, the geometric distance S1 between the upper first work roll and the upper last work roll, and the geometric distance S2 between the inlet pressure device and the outlet pressure device, where:

[0041]

[0042] This step uses the geometric proportionality theorem to calculate the maximum reduction limit for the leveler's inlet reduction device based on the work roll reduction protection value k. Preferably, the geometric distance between the rolls is the distance between their centers; the distance between the reduction devices is the distance between their geometric centers or the distance between their centerlines.

[0043] In a specific implementation, the pressing device is a pressing cylinder.

[0044] The multi-roll straightening machine equipment includes: a frame, multiple pressing cylinders, an upper crossbeam, an upper roller box, a lower roller box, and a lower crossbeam; wherein, the upper working roller and the upper support roller are arranged in the upper roller box; the lower working roller and the lower support roller are arranged in the lower roller box; the lower roller box is placed on the lower crossbeam; and the lower crossbeam is connected to the frame. The straightening machine's pressing process is inclined pressing, wherein, during inclined pressing, the pressing device is inclined toward the inlet side, the inlet side has a large pressing pressure, that is, the pressing pressure is large, and the pressing pressure decreases toward the outlet. Therefore, the inlet pressure is large, that is, the pressing pressure at the strip inlet is large, and the outlet pressure is small, that is, the pressing pressure at the strip outlet is small. The pressing center point is the geometric center of the inclined swing of the upper roller box, such as Figure 3 The O point in the figure is the geometric center of the arc guide plate that matches the upper roller box and the frame. The upper roller box rotates around this point when it is tilted and pressed down.

[0045] Figure 3 This is a schematic diagram of the multi-roller straightening machine in state 1 when it is not tilted and pressed down. Figure 3-1 for Figure 3 The partial enlarged view is for easy viewing of the variables marked in the figure. In this embodiment, the straightening machine's pressing device includes four pressing cylinders, specifically: inlet pressing cylinder 1 and pressing cylinder 3 on the strip inlet side; outlet pressing cylinder 2 and pressing cylinder 4 on the strip outlet side. Figure 2 , hold-down cylinders 1 and 3 are arranged in tandem; hold-down cylinders 2 and 4 are arranged in tandem; hold-down cylinders 1 and 2 are symmetrically arranged along the centerline of the straightener, and hold-down cylinders 3 and 4 are symmetrically arranged along the centerline of the straightener. The common tangent line of the upper and lower work rolls is the position where the upper and lower work rolls are simultaneously tangent to the same line. The diameter of the work rolls of the straightener, i.e., the roll diameter D, is the same. The roll spacing between adjacent work rolls in the upper work rolls, i.e., the roll center distance, is the same as the roll spacing between adjacent work rolls in the lower work rolls, i.e., the roll center distance; t is the half roll spacing, i.e., half of the roll center distance between the aforementioned adjacent work rolls.

[0046] In this embodiment, the upper and lower working rolls are numbered according to the distance between the working rolls and the entry end. The lower working roll closest to the entry end is set as the first roll, that is, the working roll numbered No. 1, the working roll No. 2 is the upper working roll, the working roll No. 3 is the second lower working roll after the lower working roll (that is, the second one from the left to the right among the lower working rolls), and so on. The working roll No. n-1 is the upper last working roll, and the working roll No. n is the lower last working roll. In this example, the number of lower working rolls is one more than the number of upper working rolls.

[0047] like Figure 3As shown in the figure, among all the roller spacings of the upper and lower working rollers, that is, the roller center distance, the roller center distance between NO.2 roller and NO.3 roller is the closest, that is, the roller center distance is the smallest, and the spacings between the other upper and lower working rollers are all greater than that between NO.2 roller and NO.3 roller, which is the smallest roller center distance. Suppose the center distance between NO.2 and NO.3 rollers is m.

[0048] In the embodiment of the present invention, in order to protect the straightening machine equipment, the starting point is to make the upper and lower working rolls not press against each other, and find the upper working roll R that makes the rollers closest. u and lower working roll R d The center distance of the rollers without pressing is m. Figure 2 The center distance m between rollers No. 2 and No. 3 is determined to prevent them from being pressed together. The range of m is: m ≥ D + h + δ. The equality sign corresponds to the minimum value of m, meaning m must be greater than or equal to this minimum value to prevent rollers No. 2 and No. 3 from being pressed together. In one specific implementation, δ is set to 1 to 10 mm.

[0049] Figure 4 This is a schematic diagram of state 2 when the multi-roller straightening machine is tilted and pressed down to the roller common tangent position. Figure 4-1 for Figure 4 A partial enlargement of the figure makes it easier to see the variables marked in the figure. Figure 5 This is a schematic diagram of state 3 when the multi-roller straightening machine is tilted and pressed down from the roller tangent line position to the given pressing target value, that is, the pressing set value. Figures 3 to 5 , you can further understand the various quantities used in the protection setting method of the embodiment of the present invention, including: the diameter D of the straightening machine working roll, the inclination angle θ of the upper roll box around its own geometric center point O when the straightening machine is tilted and pressed down, the distance from point O to the upper working roll R u The distance R from the center point A of the straightening machine, the half-roll spacing t, the angle α between OA and the common tangent line of the upper and lower work rolls, the protective value k' of the inlet screw-down cylinder, the geometric distance S1 between the upper first and upper last work rolls, and the geometric distance S2 between the inlet screw-down cylinder and the outlet screw-down cylinder. The value of θ is determined by the screw-down regulations of the straightening machine; the protective value k' of the inlet screw-down cylinder is the maximum screw-down limit of the straightening machine's inlet screw-down device, such as the screw-down cylinder; and R is a structural parameter. Preferably, the common tangent line of the upper and lower work rolls is a horizontal line. Figure 3 In the figure, half the distance between the centers of the No. 1 and No. 3 rollers is marked as the half roller distance t. Figures 3 to 5 In the figure, the upper first working roll is roll No. 2, the upper last working roll is roll No. n-1, S1 is the distance between the roll centers of roll No. 2 and roll No. n-1; S2 is the distance between the center lines of inlet pressure cylinder 1 and outlet pressure cylinder 2; or the distance between the center lines of inlet pressure cylinder 3 and outlet pressure cylinder 4.

[0050] Example 3:

[0051] The present invention also provides a protection setting device for tilting and pressing down of a multi-roller straightening machine, such as Figure 6 As shown, the device includes a processor 601, a memory 602, a bus 603, and a computer program stored in the memory 602 and executable on the processor 601. The processor 601 includes one or more processing cores. The memory 602 is connected to the processor 601 via the bus 603. The memory 602 is used to store program instructions. When the processor executes the computer program, the steps in the above-mentioned method embodiment of the first embodiment of the present invention are implemented.

[0052] Furthermore, as an executable solution, the protection setting device for tilting and pressing down the multi-roller straightening machine can be a computer unit, which can be a computing device such as a desktop computer, laptop, PDA, or cloud server. The computer unit may include, but is not limited to, a processor and a memory. Those skilled in the art will understand that the above-mentioned computer unit structure is merely an example of a computer unit and does not constitute a limitation of the computer unit. The computer unit may include more or fewer components than those described above, or a combination of certain components, or different components. For example, the computer unit may also include input and output devices, network access devices, buses, etc., which are not limited in the embodiments of the present invention.

[0053] Furthermore, as an executable solution, the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the computer unit and connects various parts of the entire computer unit using various interfaces and lines.

[0054] The memory can be used to store the computer programs and / or modules, and the processor implements the various functions of the computer unit by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function; the data storage area can store data created based on the use of the mobile phone, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0055] Example 4:

[0056] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above method in the embodiment of the present invention are implemented.

[0057] If the module / unit integrated in the computer unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, it can implement the steps of the above-mentioned various method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM) and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction.

[0058] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. A protection setting method for tilting down of a multi-roller straightening machine, characterized in that: include: S1, determine the upper working roll R with the closest roll center distance according to the working roll diameter D of the straightening machine, the thickness h of the plate strip to be processed and the predetermined safety distance δ u and lower working roll R d The range of the center distance m of the rollers that do not press against each other, where m ≥ D + h + δ; S2, according to the tilt angle θ of the upper roll box around its own swing geometric center point O when the straightening machine is tilted and pressed down, the distance from the O point to the upper working roll R u The upper working roll R is calculated based on the distance R from the center point A, the half roll spacing t, the overlap k of the upper and lower working rolls, and the angle α between OA and the common tangent line of the upper and lower working rolls. u and the lower working roll R d The roller center distance m, wherein the overlap amount k is determined by the common tangent and the given target value of the straightening machine, wherein: S3, according to the minimum value of m determined in step S1 and the calculation formula of m in step S2, obtaining a protection value of the working roll reduction amount, wherein the protection value of the working roll reduction amount is the reduction overlap amount k corresponding to the minimum value of m.

2. The protection setting method according to claim 1, characterized in that: After step S3, the method further includes: S4, determine the protection value k' of the straightening machine inlet pressure reduction device according to the protection value of the work roll pressure reduction amount, the geometric distance S1 between the upper first work roll and the upper last work roll, and the geometric distance S2 between the inlet pressure reduction device and the outlet pressure reduction device, wherein:

3. The protection setting method according to claim 2, characterized in that: The protection value k′ of the inlet pressure reduction device is the maximum pressure reduction limit value of the inlet pressure reduction device of the straightening machine.

4. The protection setting method according to claim 2, characterized in that: The pressing device is a pressing cylinder.

5. The protection setting method according to claim 1, characterized in that: The upper working roll R u is the upper working roll, the lower working roll R d It is the second working roll after the first working roll in the lower working roll.

6. The protection setting method according to claim 1, characterized in that: The depression overlap amount k is calculated by calculating the distance from the common tangent line to the given depression target value, wherein k=0-the given depression target value.

7. A protection setting device for tilting and pressing down of a multi-roller straightening machine, characterized in that: The method comprises a memory and a processor, wherein the memory stores at least one program, and the at least one program is executed by the processor to implement the protection setting method according to any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that The storage medium stores at least one program, and the at least one program is executed by a processor to implement the protection setting method according to any one of claims 1 to 6.

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