Application method of booster pump pressure control mode in water jet cutter CNC system

Abstract

The invention relates to an application method of a booster pump pressure control mode in a water jet cutter CNC system. The application method comprises the steps that (1) digital communication connection is established between a hydraulic servo driver and the water jet cutter CNC system; (2) setting servo parameters on the CNC system according to the specification of the motor; (3) a self-learning button is clicked on the CNC system, and a servo driver automatically adjusts rigidity parameters; (4) carrying out pilot run processing on the servo driver to observe whether the servo motion meets the expectation or not; (5) the plate attribute, the cutting speed and the cutting quality of the current cutting task are formulated on the CNC system; and (6) the CNC system executes the current cutting task. The invention also relates to a corresponding device, a processor and a computer readable storage medium. By the adoption of the method, the device, the processor and the computer readable storage medium, data transmission with the hydraulic servo is conducted in a digital communication mode, debugging and monitoring of the high-pressure pump can be completed on a CNC system, and the maintenance and use difficulty of a user is reduced.

Description

Technical Field

[0001] The present invention relates to the field of automation control technology, in particular to the field of waterjet oil pumps, and specifically refers to an application method, device, processor and computer-readable storage medium of a booster pump pressure control method in a waterjet CNC system. Background Art

[0002] like Figure 1 The figure shows the schematic diagram of the existing traditional waterjet cutting. As an independent module, the waterjet high-pressure water pump is generally independent of the control system of the equipment and is controlled solely by the PLC. The power source of the internal boost is a three-phase asynchronous motor.

[0003] High-pressure pump manufacturers only make servos and pumps, while machine tool manufacturers usually only make machine tools. Although they are all indispensable parts of water jet equipment, there is no direct information transmission between them, so they cannot form a whole and are not intelligent enough.

[0004] The defects are as follows:

[0005] 1. It is offline from the CNC system and can only output the preset pressure value in a fixed manner, which cannot meet the pressure control requirements of the process. The opening and closing control and alarm information transmission are still in the lowest level IO electrical signal switch transmission mode;

[0006] 2. Asynchronous motors are noisy, energy-intensive, and slow to increase pressure. To output the same pressure, a motor with higher power is required, and the large size is not conducive to the design of the oil pump.

[0007] 3. Tablet control cannot control the servo standby enable, and the boost response is slow.

[0008] Based on this, in order to address the above-mentioned technical defects, it is necessary to propose a method that integrates hydraulic servo control and hard PLC control logic into the CNC control system, so as to achieve the ability to instantly adjust the pressure value, reduce noise and energy consumption, and reduce the cost of equipment. Summary of the invention

[0009] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide an application method, device, processor and computer-readable storage medium of a booster pump pressure control method in a water jet CNC system.

[0010] In order to achieve the above-mentioned object, the application method, device, processor and computer-readable storage medium of the booster pump pressure control method of the present invention in the water jet CNC system are as follows:

[0011] The application method of the booster pump pressure control method in the water jet CNC system has the following main features:

[0012] (1) Establish digital communication connection between the hydraulic servo drive and the water jet CNC system;

[0013] (2) Set servo parameters on the CNC system according to motor specifications;

[0014] (3) Clicking the self-learning button on the CNC system causes the servo driver to automatically adjust the rigidity parameters;

[0015] (4) performing a trial run on the servo driver to observe whether the servo motion meets expectations;

[0016] (5) determining the plate properties, cutting speed, and cutting quality of the current cutting task on the CNC system;

[0017] (6) The CNC system described executes the current cutting task.

[0018] Preferably, the step (1) is specifically as follows:

[0019] The digital communication connection is established by using Modbus48 protocol communication or bus EtherCAT protocol communication, wherein the host interface of the numerical control system is connected with the Modbus485 protocol communication, or a network cable is used to transmit data with the EtherCAT protocol communication.

[0020] Preferably, the step (2) is specifically as follows:

[0021] The servo parameters are modified through the human-machine interaction page of the CNC system to complete the reading and writing processing of the servo parameters.

[0022] Preferably, the step (4) is specifically as follows:

[0023] Click the self-learning button on the human-machine interface of the CNC system to start the motor in the hydraulic servo driver to run, and check whether the rotation speed and direction of the motor meet expectations.

[0024] Preferably, the step (6) is specifically as follows:

[0025] The CNC system adjusts the corresponding cutting pressure command value in real time according to the current cutting task, and sends it to the hydraulic servo driver after completing the numerical calculation, so as to adjust the cutting pressure in real time according to the cutting state.

[0026] Preferably, the method further comprises:

[0027] When a servo alarm message appears, the CNC system directly reads and displays the servo alarm ID message through a human-computer interaction interface, and provides a servo alarm clearing function.

[0028] The application device of the booster pump pressure control method in the water jet CNC system has the following main features: the device comprises:

[0029] a processor configured to execute computer executable instructions;

[0030] The memory stores one or more computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the application method of the booster pump pressure control method in the water jet CNC system are implemented.

[0031] The processor for applying the booster pump pressure control method in the water jet CNC system has the main feature that the processor is configured to execute computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the application method of the booster pump pressure control method in the water jet CNC system are implemented.

[0032] The main feature of the computer-readable storage medium is that a computer program is stored thereon, and the computer program can be executed by a processor to implement the steps of the application method of the above-mentioned booster pump pressure control method in a water jet CNC system.

[0033] The application method, device, processor and computer-readable storage medium of the booster pump pressure control method of the present invention in the water jet CNC system can greatly reduce the noise compared with the asynchronous motor by controlling the pressure hardware to output the pressure of the gear pump + permanent magnet synchronous motor; at the same time, the CNC system is used to control the output pressure, and the output can be automatically switched according to the water jet cutting and idling state, which can reduce energy consumption; digital communication is used to control the high and low pressure conversion, breaking away from the traditional method of opening and closing through a relay switch and only being able to switch between two gears with different pressure values, and realizing continuous adjustable output pressure, and the pressure size can be controlled at any time; digital communication is used to communicate with the hydraulic servo The CNC system can transmit data through the servo, and the high-pressure pump can be debugged and monitored on the CNC system, forming a closed-loop monitoring of the entire high-pressure system, providing safer pressure control and intuitive human-computer interaction pages. Operators no longer need to understand the adjustment of the hydraulic servo, reducing the difficulty of user maintenance and use; the CNC system soft PLC logic is used to replace the electrical response switch of the traditional hard PLC to control the operation of the booster pump, providing a more efficient and easy-to-edit and understand PLC logic, saving the PLC control panel and some PLC relays, and reducing the equipment cost; on this basis, in the non-cutting state, there is no need for continuous rotation to achieve pressure maintenance / energy saving of about 30%. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the water jet oil pump pressure supply for a water jet cutting machine in the prior art.

[0035] Figure 2 It is an overall data interaction flow chart of the application method of the booster pump pressure control method of the present invention in the water jet CNC system.

[0036] Figure 3 It is a schematic diagram of setting servo parameters in the application method of the booster pump pressure control method of the present invention in a water jet CNC system.

[0037] Figure 4 It is a schematic diagram of servo debugging in the application method of the booster pump pressure control method of the present invention in a water jet CNC system.

[0038] Figure 5 It is a schematic diagram of selecting a processing technology in the application method of the booster pump pressure control method of the present invention in a water jet CNC system.

[0039] Figure 6 This is an effect diagram of the application method of the booster pump pressure control method of the present invention in a water jet CNC system using a hydraulic servo motor speed and a traditional asynchronous motor speed for speed comparison.

[0040] Figure 7 A schematic diagram of the application method of the booster pump pressure control method of the present invention in a water jet CNC system for motor monitoring.

[0041] Figure 8 The schematic diagram is a method for monitoring the working state of the hydraulic servo by applying the booster pump pressure control method of the present invention in a waterjet CNC system. DETAILED DESCRIPTION

[0042] In order to more clearly describe the technical content of the present invention, further description is given below in conjunction with specific embodiments.

[0043] Before describing in detail embodiments according to the present invention, it should be noted that, hereinafter, the terms "comprises", "includes" or any other variations are intended to cover non-exclusive inclusion, whereby a process, method, article or apparatus comprising a series of elements includes not only these elements, but also other elements not explicitly listed or inherent to such process, method, article or apparatus.

[0044] See also Figure 2 As shown, the application method of the booster pump pressure control method in the water jet CNC system, wherein the method comprises the following steps:

[0045] (1) Establish digital communication connection between the hydraulic servo drive and the water jet CNC system;

[0046] (2) Set servo parameters on the CNC system according to the motor specifications;

[0047] (3) Clicking the self-learning button on the CNC system causes the servo driver to automatically adjust the rigidity parameters;

[0048] (4) performing a trial run on the servo driver to observe whether the servo motion meets expectations;

[0049] (5) determining the plate properties, cutting speed, and cutting quality of the current cutting task on the CNC system;

[0050] (6) The CNC system described executes the current cutting task.

[0051] As a preferred embodiment of the present invention, the step (1) is specifically:

[0052] The digital communication connection is established by using Modbus48 protocol communication or bus EtherCAT protocol communication, wherein the host interface of the numerical control system is connected with the Modbus485 protocol communication, or a network cable is used to transmit data with the EtherCAT protocol communication.

[0053] As a preferred embodiment of the present invention, the step (2) is specifically as follows:

[0054] The servo parameters are modified through the human-machine interaction page of the CNC system to complete the reading and writing processing of the servo parameters.

[0055] As a preferred embodiment of the present invention, the step (4) is specifically as follows:

[0056] Click the self-learning button on the human-machine interface of the CNC system to start the motor in the hydraulic servo driver to run, and check whether the rotation speed and direction of the motor meet expectations.

[0057] As a preferred embodiment of the present invention, the step (6) is specifically as follows:

[0058] The CNC system adjusts the corresponding cutting pressure command value in real time according to the current cutting task, and sends it to the hydraulic servo driver after completing the numerical calculation, so as to adjust the cutting pressure in real time according to the cutting state.

[0059] As a preferred embodiment of the present invention, the method further comprises:

[0060] When a servo alarm message appears, the CNC system directly reads and displays the servo alarm ID message through a human-computer interaction interface, and provides a servo alarm clearing function.

[0061] In actual application, this technical solution uses digital communication to allow the waterjet CNC system to directly transmit data with the hydraulic servo drive in the high-pressure system, achieving intelligent pressure control and high-pressure status monitoring at any time. It mainly includes the following processing methods:

[0062] 1. The hydraulic servo digital communication protocol modes include: Modbus485 protocol communication and bus EtherCAT protocol communication;

[0063] Modbus485 communication is directly connected to the CNC system host interface; EtherCAT communication uses network cables for data transmission. In actual applications, our LD21E terminal board cascades its network communication interface behind the servo axis to achieve digital connection with a variety of different brands and models of hydraulic servos.

[0064] 2. This technical solution provides a human-machine interaction page on the CNC system through digital communication, and direct debugging of the hydraulic servo:

[0065] a) Servo parameter reading and writing: modify the servo parameters through the human-computer interaction page to avoid complex operations on the servo panel buttons;

[0066] b) Servo debugging self-learning: through the human-machine interaction page, the servo can automatically adjust the rigidity and set the best performance parameters;

[0067] c) Servo debugging and trial run: Use the human-computer interaction page to let the servo operate within a certain range to observe whether the servo movement meets expectations;

[0068] d) Direct reading of servo alarm ID information and servo alarm clearing function. The servo panel can only display numbers. When an error alarm occurs, the operator needs to find the corresponding servo operation document information for processing. This technical solution can directly express the error information in text in the CNC system, which is convenient and quick to locate.

[0069] 3. This technical solution supports the application of CNC controlled cutting pressure in various water jet industries. The pressure can be set according to the needs of CNC processing, and different cutting pressures can be set according to different processing speeds, different cutting trajectories, and different cutting materials.

[0070] Specifically, the communication method between the hydraulic servo and CNC in this technical solution is: modbus485, bus EtherCAT;

[0071] Pressure control mode: voltage analog control, digital command control;

[0072] Pressure mode: constant speed mode, follow CNC status adjustment mode;

[0073] Oil temperature and water pressure feedback support analog access to hydraulic servo.

[0074] In a specific embodiment of the present invention, the processing steps of the technical solution are as follows:

[0075] 1. Establish communication between the oil pump servo and CNC: The wiring and communication settings are different according to different communication protocols. Modbus needs to set the communication TCPIP address and port address, and the bus needs to set the servo station address;

[0076] 2. Servo parameter setting: Set the servo parameters on the CNC system according to the motor specifications;

[0077] 3. Servo self-learning: Click the self-learning button on the CNC system, and the servo automatically adjusts the rigidity parameters;

[0078] 4. Servo test run: Set the servo motor movement speed. Click the self-learning button on the interface, the motor will run, and check whether the motor rotation speed and direction are as expected;

[0079] 5. Set the plate properties, cutting speed and cutting quality of the current cutting task on the CNC system;

[0080] 6. When executing the cutting task on the CNC system, the system will need to adjust the cutting pressure command value in real time, calculate it, and then send it to the hydraulic servo to adjust the cutting pressure in real time according to the cutting status.

[0081] See also Figure 6 As shown, the speed of the hydraulic servo motor using this technical solution is compared with that of the traditional asynchronous motor. According to the trajectory of the part drawing, the tool head does not need to cut while moving from one graphic end point to another graphic starting point. Previously, the booster pump would continue to work because it was offline from the CNC, resulting in risks caused by excessive pressure, or the need for additional pressure relief resulting in energy waste. The present technical solution can control the hydraulic servo to be in a standby pressure-maintaining state for a long time.

[0082] See also Figure 7 As shown in the figure, the various indicator data displayed when the hydraulic servo works continuously for a long time and the motor is monitored. Figure 8 This is the hydraulic servo working status monitoring screen.

[0083] The application device of the booster pump pressure control method in a water jet CNC system, wherein the device comprises:

[0084] a processor configured to execute computer executable instructions;

[0085] The memory stores one or more computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the application method of the booster pump pressure control method in the water jet CNC system are implemented.

[0086] A processor for applying the booster pump pressure control method in a water jet CNC system, wherein the processor is configured to execute computer executable instructions, and when the computer executable instructions are executed by the processor, the steps of the method for applying the booster pump pressure control method in a water jet CNC system are implemented.

[0087] The computer-readable storage medium stores a computer program thereon, and the computer program can be executed by a processor to implement the steps of the method for applying the above-mentioned booster pump pressure control method in a water jet CNC system.

[0088] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0089] It should be understood that each part of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution device.

[0090] A person of ordinary skill in the art may understand that all or part of the steps of the method for implementing the above-mentioned embodiment may be completed by instructing the relevant hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one of the steps of the method embodiment or a combination thereof.

[0091] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0092] In the description of this specification, the description with reference to the terms "an embodiment", "some embodiments", "example", "specific example", or "embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0093] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0094] The application method, device, processor and computer-readable storage medium of the booster pump pressure control method of the present invention in the water jet CNC system can greatly reduce the noise compared with the asynchronous motor by controlling the pressure hardware to output the pressure of the gear pump + permanent magnet synchronous motor; at the same time, the CNC system is used to control the output pressure, and the output can be automatically switched according to the water jet cutting and idling state, which can reduce energy consumption; digital communication is used to control the high and low pressure conversion, breaking away from the traditional method of opening and closing through a relay switch and only being able to switch between two gears with different pressure values, and realizing continuous adjustable output pressure, and the pressure size can be controlled at any time; digital communication is used to communicate with the hydraulic servo The CNC system can transmit data through the servo, and the high-pressure pump can be debugged and monitored on the CNC system, forming a closed-loop monitoring of the entire high-pressure system, providing safer pressure control and intuitive human-computer interaction pages. Operators no longer need to understand the adjustment of the hydraulic servo, reducing the difficulty of user maintenance and use; the CNC system soft PLC logic is used to replace the electrical response switch of the traditional hard PLC to control the operation of the booster pump, providing a more efficient and easy-to-edit and understand PLC logic, saving the PLC control panel and some PLC relays, and reducing the equipment cost; on this basis, in the non-cutting state, there is no need for continuous rotation to achieve pressure maintenance / energy saving of about 30%.

[0095] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it is apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Claims

1. An application method of a booster pump pressure control method in a water jet CNC system, characterized in that: The method described comprises the following steps: (1) Establish digital communication connection between the hydraulic servo drive and the water jet CNC system; (2) Set servo parameters on the CNC system according to motor specifications; (3) Clicking the self-learning button on the CNC system causes the servo driver to automatically adjust the rigidity parameters; (4) performing a trial run on the servo driver to observe whether the servo motion meets expectations; (5) determining the plate properties, cutting speed, and cutting quality of the current cutting task on the CNC system; (6) The CNC system described executes the current cutting task.

2. The method for applying the booster pump pressure control method in a waterjet CNC system according to claim 1 is characterized in that: The step (1) is specifically as follows: The digital communication connection is established by using Modbus48 protocol communication or bus EtherCAT protocol communication, wherein the host interface of the numerical control system is connected with the Modbus485 protocol communication, or a network cable is used to transmit data with the EtherCAT protocol communication.

3. The method for applying the booster pump pressure control method in a waterjet CNC system according to claim 1 is characterized in that: The step (2) is specifically as follows: The servo parameters are modified through the human-machine interaction page of the CNC system to complete the reading and writing processing of the servo parameters.

4. The method for applying the booster pump pressure control method in a waterjet CNC system according to claim 1 is characterized in that: The step (4) is specifically as follows: Click the self-learning button on the human-machine interface of the CNC system to start the motor in the hydraulic servo driver to run, and check whether the rotation speed and direction of the motor meet expectations.

5. The method for applying the booster pump pressure control method in a waterjet CNC system according to claim 1 is characterized in that: The step (6) is specifically as follows: The CNC system adjusts the corresponding cutting pressure command value in real time according to the current cutting task, and sends it to the hydraulic servo driver after completing the numerical calculation, so as to adjust the cutting pressure in real time according to the cutting state.

6. The method for applying the booster pump pressure control method in a water jet CNC system according to claim 1 is characterized in that: The method further comprises: When a servo alarm message appears, the CNC system directly reads and displays the servo alarm ID message through a human-computer interaction interface, and provides a servo alarm clearing function.

7. An application device of a booster pump pressure control method in a water jet CNC system, characterized in that: The device comprises: a processor configured to execute computer-executable instructions; A memory stores one or more computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the method for applying the booster pump pressure control method in any one of claims 1 to 6 in a water jet CNC system are implemented.

8. A processor for applying a booster pump pressure control method in a waterjet CNC system, characterized in that: The processor is configured to execute computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the method for applying the booster pump pressure control method in any one of claims 1 to 6 in a water jet CNC system are implemented.

9. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program can be executed by a processor to implement the steps of the method for applying the booster pump pressure control method in any one of claims 1 to 6 in a water jet CNC system.

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