Online testing method and device for rolling mill servo hydraulic cylinder, medium and electronic equipment

Abstract

The application discloses a rolling mill servo hydraulic cylinder online testing method and device, medium and electronic equipment, wherein the method comprises the following steps: obtaining a pressure maintaining test force and a pressure maintaining test time of a servo hydraulic cylinder; resetting the servo hydraulic cylinders on both sides of a rolling mill; simulating a working state of the rolling mill; controlling the servo hydraulic cylinders to press down, stopping the pressing down when a rolling force resultant of the servo hydraulic cylinders is greater than or equal to the pressure maintaining test force; keeping the pressing down state of the servo hydraulic cylinders, and the keeping time is greater than or equal to the pressure maintaining test time; and detecting a functional precision parameter of the servo hydraulic cylinders. The application can perform online testing on the rolling mill servo hydraulic cylinders, and reduces production cost.

Description

Technical Field

[0001] This invention belongs to the field of rolling mill technology, and in particular, relates to a method and control system for online testing of the functional accuracy of rolling mill servo hydraulic cylinders. Background Technology

[0002] Servo hydraulic cylinders are key actuators in electro-hydraulic servo systems and have a wide range of applications. Among them, large servo hydraulic cylinders are core equipment used in the hydraulic thickness automatic control system of rolling mills, characterized by large working load, short stroke, high frequency response, and difficulty in fault diagnosis.

[0003] Large servo hydraulic cylinders used in the hydraulic thickness automatic control system of rolling mills are also known as hydraulic automatic gauge control (HAGC) cylinders. To ensure the quality of HAGC cylinders, both new and used parts need to be inspected. For new HAGC cylinders, a pressure test is performed after assembly to check for oil leakage during operation, thereby assessing the sealing effect and preventing quality problems and oil leaks after delivery. For used HAGC cylinders, on the one hand, after a period of use, they are normally taken off the machine and pressure tested by a professional department; on the other hand, after a period of use, they are taken off the machine due to abnormal malfunctions and pressure tested by a professional department to check for oil leaks and repair them.

[0004] Currently, the testing of HAGC cylinders needs to be carried out offline and requires professional departments, which increases the maintenance costs for enterprises. It also has the disadvantages of long testing cycles and delayed test results, and cannot effectively assess the equipment accuracy in the actual rolling process. Summary of the Invention

[0005] The embodiments of this application provide an online testing method, apparatus, medium, and electronic equipment for rolling mill servo hydraulic cylinders, which can perform online testing on the servo hydraulic cylinders of rolling mills.

[0006] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0007] According to a first aspect of the embodiments of this application, an online testing method for a rolling mill servo hydraulic cylinder is provided, including:

[0008] Obtain the pressure holding test force and pressure holding test time of the servo hydraulic cylinder;

[0009] The servo hydraulic cylinders on both sides of the rolling mill are reset;

[0010] Simulate the working state of a rolling mill;

[0011] The servo hydraulic cylinder is controlled to press down. When the resultant rolling force of the servo hydraulic cylinder is greater than or equal to the pressure holding test force, the pressing is stopped.

[0012] The servo hydraulic cylinder is kept in a depressed state for a duration greater than or equal to the pressure holding test time.

[0013] The functional accuracy parameters of the servo hydraulic cylinder are detected.

[0014] In some embodiments of this application, based on the foregoing scheme, resetting the servo hydraulic cylinder includes:

[0015] Disconnect the medium pipeline, valves, and the servo hydraulic cylinder;

[0016] The elongation deviation of the servo hydraulic cylinders on both sides of the rolling mill is adjusted to 0.

[0017] In some embodiments of this application, based on the aforementioned scheme, the servo enable of the servo hydraulic cylinder is turned off before maintaining the downward state of the servo hydraulic cylinder, and the servo enable of the servo hydraulic cylinder is turned on after maintaining the downward state of the servo hydraulic cylinder. The functional accuracy parameters of the servo hydraulic cylinder are detected by detecting the parameters at the two time points of turning off the servo enable of the servo hydraulic cylinder and turning on the servo enable of the servo hydraulic cylinder.

[0018] In some embodiments of this application, based on the foregoing scheme, the simulated rolling mill operating state includes:

[0019] Switch the rolling mill from automatic mode to manual mode;

[0020] Turn on the cooling water for the rolling mill work rolls and start the main drive of the rolling mill at the preset speed.

[0021] In some embodiments of this application, based on the foregoing scheme, the following further methods are also included:

[0022] The rolling force at the moment of contact of the rolls is obtained, wherein the rolling force at the moment of contact of the rolls is less than or equal to the holding pressure test force;

[0023] Reset the electric cylinder;

[0024] The electric cylinder is controlled to press down, and the pressing is stopped when the resultant rolling force of the electric cylinder is greater than or equal to the rolling force when the rolls are in contact.

[0025] The electric cylinder is kept in a depressed state for a duration greater than or equal to the pressure holding test time.

[0026] The functional accuracy parameters of the electric cylinder are tested.

[0027] In some embodiments of this application, based on the foregoing scheme, resetting the electric cylinder includes:

[0028] Adjust the elongation deviation of the electric cylinders on both sides of the rolling mill to 0.

[0029] In some embodiments of this application, based on the foregoing scheme, the functional accuracy parameters of the servo hydraulic cylinder include:

[0030] The rolling force variation, the resultant rolling force variation, the servo hydraulic cylinder plug cavity pressure variation, the servo hydraulic cylinder rod cavity pressure variation, and the roll gap deviation variation on both sides of the mill are defined as follows: the rolling force variation represents the variation of the rolling force provided by the servo hydraulic cylinder; the resultant rolling force variation represents the variation of the resultant rolling force provided by multiple servo hydraulic cylinders; the servo hydraulic cylinder plug cavity pressure variation represents the variation of the servo hydraulic cylinder plug cavity pressure; and the servo hydraulic cylinder rod cavity pressure variation represents the variation of the servo hydraulic cylinder rod cavity pressure.

[0031] In some embodiments of this application, based on the foregoing scheme, controlling the downward pressure of the servo hydraulic cylinder includes:

[0032] Obtain the maximum downward pressure rate of the servo hydraulic cylinder;

[0033] The servo hydraulic cylinder presses down at a rate less than or equal to the maximum pressing rate of the servo hydraulic cylinder.

[0034] In some embodiments of this application, based on the foregoing scheme, the following further methods are also included:

[0035] The maximum deviation of the rolling force of the servo hydraulic cylinders on both sides of the rolling mill is obtained as a reference deviation;

[0036] When the rolling force deviation of the servo hydraulic cylinders on both sides of the rolling mill is greater than or equal to the reference deviation, the detection process of the servo hydraulic cylinders is restarted.

[0037] In some embodiments of this application, based on the foregoing scheme, controlling the electric cylinder to press down includes:

[0038] Obtain the maximum downward pressure rate of the electric cylinder;

[0039] The electric cylinder presses down at a rate less than or equal to the maximum pressing rate of the electric cylinder.

[0040] In some embodiments of this application, based on the foregoing scheme, the following further methods are also included:

[0041] The maximum deviation of the rolling force of the electric cylinders on both sides of the rolling mill is obtained as a reference deviation;

[0042] When the rolling force deviation of the electric cylinders on both sides of the rolling mill is greater than or equal to the reference deviation, the detection process of the servo hydraulic cylinder is restarted.

[0043] In some embodiments of this application, online testing of the rolling mill can be performed, which effectively improves testing efficiency, reduces production costs, abandons the traditional offline testing mode, and adopts automatic online testing technology to achieve a perfect combination of accuracy and field performance. Online pressure holding testing can reduce the failure rate of equipment, diagnose potential faults in equipment that has not yet reached its service life, save enterprise maintenance costs, and avoid replacing equipment that has reached its service life when its accuracy is good.

[0044] According to a second aspect of the embodiments of this application, an online testing device for a rolling mill servo hydraulic cylinder is provided, the device comprising:

[0045] The acquisition unit acquires the pressure holding test force and pressure holding test time of the servo hydraulic cylinder;

[0046] The control unit resets the servo hydraulic cylinders on both sides of the rolling mill, simulates the working state of the rolling mill, controls the servo hydraulic cylinders to press down, and stops pressing down when the resultant rolling force of the servo hydraulic cylinders is greater than or equal to the pressure holding test force, and maintains the pressing state of the servo hydraulic cylinders for a time greater than or equal to the pressure holding test time.

[0047] The detection unit detects the functional accuracy parameters of the servo hydraulic cylinder.

[0048] According to a third aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored, the computer program including executable instructions that, when executed by a processor, implement the method described in any of the embodiments of the first aspect.

[0049] According to a fourth aspect of the present application, an electronic device is provided, comprising: one or more processors; and a memory for storing executable instructions of the processors, wherein when the executable instructions are executed by the one or more processors, the one or more processors cause the one or more processors to implement the method described in any embodiment of the first aspect above.

[0050] The beneficial effects of the embodiments of the second to fourth aspects described above can be referred to the beneficial effects of the first aspect and the embodiments of the first aspect described above, and will not be repeated here.

[0051] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0052] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0053] Figure 1 A flowchart of the online testing method for the rolling mill servo hydraulic cylinder in an embodiment of this application is shown;

[0054] Figure 2 A flowchart of a method for resetting the servo hydraulic cylinder in an embodiment of this application is shown;

[0055] Figure 3 A flowchart of a method for simulating the working state of a rolling mill, as illustrated in an embodiment of this application, is shown.

[0056] Figure 4 A flowchart of the electric cylinder movement in an embodiment of this application is shown;

[0057] Figure 5 A block diagram of the online testing device for the rolling mill servo hydraulic cylinder in an embodiment of this application is shown;

[0058] Figure 6 A schematic diagram of a computer-readable storage medium in an embodiment of this application is shown;

[0059] Figure 7 A schematic diagram of the system structure of an electronic device in an embodiment of this application is shown. Detailed Implementation

[0060] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0061] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0062] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0063] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0064] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0065] Figure 1 A flowchart of an online testing method for a rolling mill servo hydraulic cylinder according to an embodiment of this application is shown. This online testing method for a rolling mill servo hydraulic cylinder can be executed by a device with computing processing capabilities.

[0066] Reference Figure 1 As shown, the online testing method for the servo hydraulic cylinder of the rolling mill includes at least steps S1 to S5, which are described in detail below:

[0067] In step S1, the pressure holding test force and pressure holding test time of the servo hydraulic cylinder are obtained.

[0068] In this application, the holding pressure test force can be specifically set according to the servo hydraulic cylinder. For example, the holding pressure test force can be less than the rolling force corresponding to the rated pressure of the servo hydraulic cylinder, or it can be specifically set according to the rolling force required by the rolling mill. For example, the holding pressure test force can be greater than or equal to the rolling force required by the rolling mill. The rolling force required by the rolling mill refers to the force required by the rolling mill to roll a certain type of steel, rather than the maximum rolling force designed for the rolling mill. The holding pressure test time can be set according to the pure rolling time of the rolling mill. For example, the holding pressure test time can be greater than the pure rolling time of the rolling mill. The pure rolling time of the rolling mill refers to the interval between the rolling mill being loaded and the rolling mill being unloaded.

[0069] In step S2, the servo hydraulic cylinders on both sides of the rolling mill are reset.

[0070] In this application, the servo hydraulic cylinders on both sides of the rolling mill are reset in order to improve the detection accuracy of the servo hydraulic cylinders.

[0071] In step S3, the working state of the rolling mill is simulated.

[0072] In this application, simulating the working state of the rolling mill is to detect the parameters of the servo hydraulic cylinder when the rolling mill is working, thereby improving the detection accuracy of the servo hydraulic cylinder.

[0073] In step S4, the servo hydraulic cylinder is controlled to press down. When the resultant rolling force of the servo hydraulic cylinder is greater than or equal to the pressure holding test force, the pressing down is stopped, and the pressing state of the servo hydraulic cylinder is maintained for a time greater than or equal to the pressure holding test time.

[0074] In this application, when the resultant rolling force of the servo hydraulic cylinder is greater than or equal to the pressure holding test force, the pressing is stopped, and the holding time of the pressing state of the servo hydraulic cylinder is greater than or equal to the pressure holding test time. This is to simulate the actual working state of the servo hydraulic cylinder, that is, to simulate the actual working pressure and actual working time of the hydraulic cylinder, and to improve the detection accuracy of the servo hydraulic cylinder.

[0075] Specifically, the maximum pressing rate of the servo hydraulic cylinder is obtained, and the servo hydraulic cylinder presses down at a rate less than or equal to the maximum pressing rate of the servo hydraulic cylinder.

[0076] In step S5, the functional accuracy parameters of the servo hydraulic cylinder are detected.

[0077] In this application, the functional accuracy parameters of the servo hydraulic cylinder can be detected by detecting the oil pressure of the servo hydraulic cylinder.

[0078] Specifically, the functional accuracy parameters of the servo hydraulic cylinder include: rolling force variation, resultant rolling force variation, servo hydraulic cylinder plug cavity pressure variation, servo hydraulic cylinder rod cavity pressure variation, and roll gap deviation variation on both sides of the rolling mill. Among these, the rolling force variation represents the variation of the rolling force provided by the servo hydraulic cylinder, the resultant rolling force variation represents the variation of the resultant rolling force provided by multiple servo hydraulic cylinders, the servo hydraulic cylinder plug cavity pressure variation represents the variation of the servo hydraulic cylinder plug cavity pressure, and the servo hydraulic cylinder rod cavity pressure variation represents the variation of the servo hydraulic cylinder rod cavity pressure.

[0079] Figure 2 A flowchart of a method for resetting the servo hydraulic cylinder according to an embodiment of this application is shown. The method includes at least S21 to S22, which are described in detail below:

[0080] In step S21, the connection between the medium pipeline, valve and servo hydraulic cylinder is interrupted.

[0081] In this application, the connection between the medium pipeline, valve and the servo hydraulic cylinder is interrupted in order to reduce or avoid the influence of the medium pipeline and valve on the detection results of the servo hydraulic cylinder, and further improve the detection accuracy of the servo hydraulic cylinder.

[0082] In step S22, the elongation deviation of the servo hydraulic cylinders on both sides of the rolling mill is adjusted to 0.

[0083] In this application, the elongation deviation of the servo hydraulic cylinders on both sides of the rolling mill is leveled to 0 in order to simulate the entire working process of the servo hydraulic cylinders and improve the detection accuracy.

[0084] In this application, before maintaining the downward pressure state of the servo hydraulic cylinder, the servo enable of the servo hydraulic cylinder is turned off, and after maintaining the downward pressure state of the servo hydraulic cylinder, the servo enable of the servo hydraulic cylinder is turned on. The functional accuracy parameters of the servo hydraulic cylinder are detected by detecting the parameters at two time points: when the servo enable of the servo hydraulic cylinder is turned off and when the servo enable of the servo hydraulic cylinder is turned on. For example, the change in the pressure of the servo hydraulic cylinder plug cavity is detected by detecting the pressure at the two time points.

[0085] Figure 3 A flowchart of a method for simulating the working state of a rolling mill, as illustrated in an embodiment of this application, is shown. This method includes at least steps S31 to S32, which are described in detail below:

[0086] In step S31, the rolling mill is switched from automatic mode to manual mode.

[0087] In step S32, the cooling water for the rolling mill work rolls is turned on, and the main drive of the rolling mill is started at a preset speed.

[0088] In this application, the preset speed can be less than or equal to the maximum set speed of the main drive.

[0089] When the rolling mill includes an electric cylinder Figure 4 A flowchart of the electric cylinder movement in an embodiment of this application is shown, and a detailed description is provided below:

[0090] Sa: Obtain the rolling force when the rolls are in contact, wherein the rolling force when the rolls are in contact is less than or equal to the pressure holding test force, and reset the electric cylinder.

[0091] Specifically, the elongation deviation of the electric cylinders on both sides of the rolling mill is adjusted to 0.

[0092] Sb: Control the electric cylinder to press down. When the resultant rolling force of the electric cylinder is greater than or equal to the rolling force when the rolls are in contact, the pressing down stops.

[0093] Specifically, the maximum pressing rate of the electric cylinder is obtained, and the electric cylinder presses down at a rate less than or equal to the maximum pressing rate of the electric cylinder.

[0094] Sc: Maintain the electric cylinder in a depressed state for a duration greater than or equal to the pressure holding test time.

[0095] Sd: Detects the functional accuracy parameter of the electric cylinder.

[0096] In this application, the maximum deviation of the rolling force of the servo hydraulic cylinders on both sides of the rolling mill is obtained as a reference deviation; when the deviation of the rolling force of the servo hydraulic cylinders on both sides of the rolling mill is greater than or equal to the reference deviation, the detection process of the servo hydraulic cylinder is restarted.

[0097] In this application, the maximum deviation of the rolling force of the electric cylinders on both sides of the rolling mill is obtained as a reference deviation; when the deviation of the rolling force of the electric cylinders on both sides of the rolling mill is greater than or equal to the reference deviation, the detection process of the servo hydraulic cylinder is restarted.

[0098] To better understand this embodiment, a specific example is provided below:

[0099] The rolling mill is a four-roll reversible rolling mill. The servo hydraulic cylinder adopts HAGC oil cylinder and the electric cylinder adopts EGC. EGC is mainly responsible for rough adjustment and HAGC oil cylinder is mainly responsible for fine adjustment. The HAGC stroke is 50mm, the elongation at the unloading position is 0mm, and the elongation at the rolling position is 20mm.

[0100] The reference deviation is set to 500KN, and the reference standard deviation is set to 200KN. When the rolling force deviation of the HAGC cylinder is ≥500KN, the test is restarted; when the rolling force deviation of the EGC cylinder is ≥200KN, the test is restarted.

[0101] To ensure a successful test, the rolling mill was inspected beforehand to ensure that the air, water, electricity, gas, and oil equipment were functioning properly and that the rolling mill equipment had been calibrated.

[0102] The rolling mill switches from automatic mode to manual mode;

[0103] The deviation of EGC elongation on both sides of the rolling mill is leveled to 0mm;

[0104] The HAGC cylinders on both sides of the rolling mill are in the rolling position, and the elongation deviation of the HAGC cylinders is adjusted to 0mm.

[0105] Turn on the cooling water for the rolling mill work rolls and start the main drive at the preset speed of 0.6 m / s;

[0106] The EGCs on both sides of the mill are pressed down synchronously at a rate of 10 mm / s. When the combined rolling force on both sides is detected to be 1000 KN, the pressing is stopped.

[0107] The HAGC cylinders on both sides of the rolling mill press down synchronously at a rate of 0.1 mm / s. When the combined rolling force on both sides is detected to be 15000 KN, the pressing stops.

[0108] Turn off the servo enable of the HAGC hydraulic cylinder;

[0109] The EGC and HAGC cylinders maintain a downward pressure state for 5 minutes;

[0110] Enable servo control for the HAGC hydraulic cylinder;

[0111] The parameters for disabling and enabling the servo enable of the HAGC cylinder are detected. See Table 1 for specific detection parameters.

[0112] The HAGC cylinders on both sides of the rolling mill are reset to the rolling position.

[0113] The start time of the pressure holding test is when the servo enable of the HAGC cylinder is turned off, and the end time of the pressure holding test is when the servo enable of the HAGC cylinder is turned on. The time period from when the servo enable of the HAGC cylinder is turned off to when the servo enable of the HAGC cylinder is turned on is the pressure holding test time.

[0114] Specifically, in Table 1, DS represents the drive side, OS represents the operation side, and both represent the two sides of the rolling mill, POS... 起始 This refers to the position at the start of the pressure holding test, POS. 终止 This refers to the position at the beginning and end of the pressure holding test; ΔPOS refers to the change in position during the pressure holding test; F 起始 This refers to the initial force, F, at the start of the pressure holding test. 终止 This refers to the termination force at the start and end of the pressure holding test, while ΔF refers to the change in force during the pressure holding test. This refers to the range of position change during the pressure holding test. This refers to the range of force change during the holding pressure test. LC characterizes the data of rolling force detected by the pressure head LC, while PT characterizes the data of rolling force detected by the hydraulic pressure gauge.

[0115] The functional accuracy parameters include the rolling force variation, the resultant rolling force variation, the servo hydraulic cylinder plug cavity pressure variation, the servo hydraulic cylinder rod cavity pressure variation, and the roll gap deviation variation on both sides of the rolling mill. Among them, the rolling force variation represents the variation of the rolling force provided by the servo hydraulic cylinder, the resultant rolling force variation represents the variation of the resultant rolling force provided by multiple servo hydraulic cylinders, the servo hydraulic cylinder plug cavity pressure variation represents the variation of the servo hydraulic cylinder plug cavity pressure, and the servo hydraulic cylinder rod cavity pressure variation represents the variation of the servo hydraulic cylinder rod cavity pressure.

[0116] Specifically, the change in rolling force corresponds to the change range in the LC and PT columns, the change in the resultant rolling force corresponds to the change range in the rolling force columns on both sides of the mill, the change in the servo hydraulic cylinder plug chamber pressure corresponds to the change range in the HAGC plug chamber column, the change in the servo hydraulic cylinder rod chamber pressure corresponds to the change range in the HAGC rod chamber, and the change in the roll gap deviation on both sides of the mill corresponds to the deviation in the roll gap deviation column on both sides of the mill.

[0117] Table 1

[0118]

[0119]

[0120] Based on practical experience, the criteria for judging the accuracy parameters of the rolling mill are: rolling force variation ≤ ±8%, resultant rolling force variation ≤ ±8%, servo hydraulic cylinder piston chamber pressure variation ≤ ±8%, servo hydraulic cylinder rod chamber pressure variation ≤ ±8%, and rolling mill roll gap deviation variation ≤ 0.3mm.

[0121] The actual test results are shown in Table 2. As can be seen from Table 2, the pressure holding test of the HAGC cylinder is qualified. If the HAGC cylinder is a new part, it can be put into use. If the HAGC cylinder is an old part, it can continue to be used. In subsequent use, pressure holding tests should be carried out regularly during maintenance to track its changing trend. The equipment should be replaced based on the pressure holding test results.

[0122] When detecting position, EGC uses a position sensor, while HAGC hydraulic cylinders use a Sony magnetic scale.

[0123] Table 2

[0124]

[0125]

[0126] In this embodiment, a pressure sensor can also be used instead of the pressure head LC for detection.

[0127] See Figure 5 The diagram shows a block diagram of an online testing device for a rolling mill servo hydraulic cylinder according to an embodiment of this application.

[0128] like Figure 5 As shown, based on the same inventive concept, the second aspect of this application also provides an online testing device 100 for a rolling mill servo hydraulic cylinder, the device comprising:

[0129] Unit 101 acquires the pressure holding test force and pressure holding test time of the servo hydraulic cylinder;

[0130] The control unit 102 resets the servo hydraulic cylinders on both sides of the rolling mill to simulate the working state of the rolling mill and controls the servo hydraulic cylinders to press down. When the resultant rolling force of the servo hydraulic cylinders is greater than or equal to the pressure holding test force, the pressing down is stopped and the pressing state of the servo hydraulic cylinders is maintained for a time greater than or equal to the pressure holding test time.

[0131] The detection unit 103 detects the functional accuracy parameters of the servo hydraulic cylinder.

[0132] Based on the same inventive concept, the third aspect of this application also provides, as another aspect, a computer-readable storage medium storing a program product capable of implementing the online testing method for the rolling mill servo hydraulic cylinder described above. In some possible implementations, various aspects of this application can also be implemented as a program product including program code, which, when run on a terminal device, causes the terminal device to perform the steps described in the "Exemplary Methods" section of this specification according to the various exemplary embodiments of this application.

[0133] refer to Figure 6 As shown, a program product 200 for implementing the above-described method according to an embodiment of this application is described. It may employ a portable compact disc read-only memory (CD-ROM) and include program code, and can run on a terminal device, such as a personal computer. However, the program product of this application is not limited thereto. In this document, a readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0134] The program product may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0135] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of sending, propagating, or transmitting programs for use by or in conjunction with an instruction execution system, apparatus, or device.

[0136] The program code contained on the readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.

[0137] Program code for performing the operations of this application can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0138] In another respect, this application also provides an electronic device capable of implementing the above-described method.

[0139] Those skilled in the art will understand that various aspects of this application can be implemented as a system, method, or program product. Therefore, various aspects of this application can be specifically implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, collectively referred to herein as a "circuit," "module," or "system."

[0140] The following reference Figure 7 To describe an electronic device 300 according to this embodiment of the present application. Figure 7 The electronic device 300 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0141] like Figure 7As shown, the electronic device 300 is manifested in the form of a general-purpose computing device. The components of the electronic device 300 may include, but are not limited to: at least one processing unit 310, at least one storage unit 320, and a bus 330 connecting different system components (including storage unit 320 and processing unit 310).

[0142] The storage unit stores program code that can be executed by the processing unit 310, causing the processing unit 310 to perform the steps described in the "Embodiment Methods" section above according to various exemplary embodiments of this application.

[0143] Storage unit 320 may include readable media in the form of volatile storage units, such as random access memory (RAM) 321 and / or cache memory 322, and may further include read-only memory (ROM) 323.

[0144] Storage unit 320 may also include a program / utility 324 having a set (at least one) of program modules 325, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0145] Bus 330 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0146] Electronic device 300 can also communicate with one or more external devices 400 (e.g., keyboard, pointing device, Bluetooth device, etc.), and with one or more devices that enable a user to interact with electronic device 300, and / or with any device that enables electronic device 300 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 350. Furthermore, electronic device 300 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 360. As shown, network adapter 360 communicates with other modules of electronic device 300 via bus 330. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 300, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0147] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0148] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0149] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0150] If the integrated unit is implemented as 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 technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0151] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An online testing method for servo hydraulic cylinders in rolling mills, characterized in that, include: Obtain the pressure holding test force and pressure holding test time of the servo hydraulic cylinder; The servo hydraulic cylinders on both sides of the rolling mill are reset; Simulate the working state of a rolling mill; The servo hydraulic cylinder is controlled to press down. When the resultant rolling force of the servo hydraulic cylinder is greater than or equal to the pressure holding test force, the pressing is stopped. The servo hydraulic cylinder is kept in a depressed state for a duration greater than or equal to the pressure holding test time. Detect the functional accuracy parameters of the servo hydraulic cylinder; The functional accuracy parameters of the servo hydraulic cylinder include: The rolling force variation, the resultant rolling force variation, the servo hydraulic cylinder plug cavity pressure variation, the servo hydraulic cylinder rod cavity pressure variation, and the roll gap deviation variation on both sides of the mill are defined as follows: the rolling force variation represents the variation of the rolling force provided by the servo hydraulic cylinder; the resultant rolling force variation represents the variation of the resultant rolling force provided by multiple servo hydraulic cylinders; the servo hydraulic cylinder plug cavity pressure variation represents the variation of the servo hydraulic cylinder plug cavity pressure; and the servo hydraulic cylinder rod cavity pressure variation represents the variation of the servo hydraulic cylinder rod cavity pressure.

2. The method according to claim 1, characterized in that, The resetting of the servo hydraulic cylinder includes: Disconnect the medium pipeline, valves, and the servo hydraulic cylinder; The elongation deviation of the servo hydraulic cylinders on both sides of the rolling mill is adjusted to 0.

3. The method according to claim 1, characterized in that, Before maintaining the downward state of the servo hydraulic cylinder, the servo enable of the servo hydraulic cylinder is turned off. After maintaining the downward state of the servo hydraulic cylinder, the servo enable of the servo hydraulic cylinder is turned on. The functional accuracy parameters of the servo hydraulic cylinder are detected by detecting the parameters at two time points: when the servo enable of the servo hydraulic cylinder is turned off and when the servo enable of the servo hydraulic cylinder is turned on.

4. The method according to claim 1, characterized in that, The simulated rolling mill's operating state includes: Switch the rolling mill from automatic mode to manual mode; Turn on the cooling water for the rolling mill work rolls and start the main drive of the rolling mill at the preset speed.

5. The method according to any one of claims 1-4, characterized in that, The control of the servo hydraulic cylinder to press down includes: Obtain the maximum downward pressure rate of the servo hydraulic cylinder; The servo hydraulic cylinder presses down at a rate less than or equal to the maximum pressing rate.

6. The method according to any one of claims 1-4, characterized in that, Also includes: The maximum deviation of the rolling force of the servo hydraulic cylinders on both sides of the rolling mill is obtained as a reference deviation; When the rolling force deviation of the servo hydraulic cylinders on both sides of the rolling mill is greater than or equal to the reference deviation, the method described in claim 1 shall be restarted.

7. An online testing device for a rolling mill servo hydraulic cylinder, characterized in that, The device includes: The acquisition unit acquires the pressure holding test force and pressure holding test time of the servo hydraulic cylinder; The control unit resets the servo hydraulic cylinders on both sides of the rolling mill and controls the servo hydraulic cylinders to press down. When the resultant rolling force of the servo hydraulic cylinders is greater than or equal to the pressure holding test force, the pressing down is stopped, and the pressing state of the servo hydraulic cylinders is maintained for a time greater than or equal to the pressure holding test time. The detection unit detects the functional accuracy parameters of the servo hydraulic cylinder. The functional accuracy parameters of the servo hydraulic cylinder include: The rolling force variation, the resultant rolling force variation, the servo hydraulic cylinder plug cavity pressure variation, the servo hydraulic cylinder rod cavity pressure variation, and the roll gap deviation variation on both sides of the mill are defined as follows: the rolling force variation represents the variation of the rolling force provided by the servo hydraulic cylinder; the resultant rolling force variation represents the variation of the resultant rolling force provided by multiple servo hydraulic cylinders; the servo hydraulic cylinder plug cavity pressure variation represents the variation of the servo hydraulic cylinder plug cavity pressure; and the servo hydraulic cylinder rod cavity pressure variation represents the variation of the servo hydraulic cylinder rod cavity pressure.

8. A computer-readable storage medium having a computer program stored thereon, the computer program including executable instructions that, when executed by a processor, implement the online testing method for a rolling mill servo hydraulic cylinder as described in any one of claims 1-6.

9. An electronic device, comprising: One or more processors; A memory for storing executable instructions of the processor, which, when executed by the one or more processors, cause the one or more processors to implement the online testing method for the rolling mill servo hydraulic cylinder according to any one of claims 1-6.

Images