CN102814836A - Virtual instrument based gas-liquid supercharging die-cutting machine pressure detection and control device - Google Patents

Abstract

The invention discloses a pressure measurement and control device for a gas-liquid booster die-cutting machine based on a virtual instrument, which comprises: a gas-liquid booster die-cutting machine; a detection mechanism installed on the gas-liquid booster die-cutting machine; Data acquisition system; the virtual instrument control platform connected with the data acquisition system, which can receive and process the pressure and displacement information transmitted by the data acquisition system, and issue relevant control instructions; the servo control device connected with the virtual instrument control platform, whose According to the control instructions issued by the virtual instrument control platform, the actuators in the gas-hydraulic pressurized die-cutting machine are controlled to perform corresponding actions. The pressure measurement and control device of the gas-liquid pressurized die-cutting machine based on the virtual instrument of the present invention can adjust the die-cutting speed, automatically adjust the die-cutting pressure, and realize digitization, automation and visualization of the die-cutting pressure adjustment process.

Description

Pressure measurement and control device of gas-hydraulic pressurized die-cutting machine based on virtual instrument

technical field

The invention relates to a pressure measurement and control device of a die-cutting machine, in particular to a pressure measurement and control device of a die-cutting machine based on a virtual instrument.

Background technique

The die-cutting pressure is an important parameter of the working performance of the die-cutting machine. There are many types of parts in the traditional die-cutting mechanism, the adjustment of the die-cutting pressure is not accurate, and intelligent control cannot be performed. For example, the Chinese patent publication number is CN202062702U, a utility model titled "a die-cutting mechanism with a die-cutting pressure test device", which discloses a die-cutting mechanism with a die-cutting pressure test device, including a support mechanism; An upper platform at the upper end of the supporting mechanism; a moving platform located under the upper platform and sliding on the supporting mechanism; and a gas-liquid booster drive device supported by the supporting mechanism and connected to the bottom of the moving platform; A pressure sensor is installed at the hydraulic input end of the gas-hydraulic booster drive device; the pressure sensor is externally connected to a pressure calculation display, and the pressure calculation display can test the driving force of the gas-hydraulic booster drive device in real time, and display the die-cutting in real time through the display unit The die-cutting pressure of the mechanism can be accurately controlled to apply the force of the pressure mechanism. The core of the driving mechanism of the die-cutting mechanism with the die-cutting pressure test device is the gas-liquid booster system. The reciprocating motion of the actuator is completed through the control circuit of the pneumatic system, and the pressure and speed of the system's idle stroke and booster stroke can be realized. The manual adjustment of the existing die-cutting mechanism solves the problem that the existing die-cutting mechanism is not convenient for testing the die-cutting pressure, resulting in low die-cutting accuracy of the die-cutting mechanism, and is not suitable for precise control of the die-cutting mechanism. However, it cannot realize the pressure regulation process The digitization and automation of the system cannot record and process experimental data in real time.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, and to provide a pressure measurement and control device for a gas-liquid pressurized die-cutting machine based on a virtual instrument, which can adjust the die-cutting speed, automatically adjust the die-cutting pressure, and realize die-cutting. Digitization, automation and visualization of pressure regulation processes.

In order to achieve the above-mentioned purpose of the present invention, the gas-liquid booster die-cutting machine pressure measurement and control device based on the virtual instrument of the present invention includes: a gas-liquid booster die-cutting machine; a detection mechanism installed on the gas-liquid booster die-cutter; The data acquisition system connected to the organization; the virtual instrument control platform connected to the data acquisition system, which can receive and process the pressure and displacement information transmitted by the data acquisition system, and issue relevant control instructions; the servo control platform connected to the virtual instrument control platform The device controls the actuators in the gas-hydraulic pressurized die-cutting machine to perform corresponding actions according to the control instructions issued by the virtual instrument control platform.

Wherein, the gas-liquid pressurized die-cutting machine includes: a support structure; an upper platform fixed on the upper end of the support structure; a lower platform sliding on the support structure and located below the upper platform; a gas-liquid booster mechanism supported by the support structure, The gas-liquid supercharging mechanism includes: a working cylinder and a drive rod pierced through the top of the working cylinder and connected to the bottom of the lower platform, wherein the working cylinder is respectively connected with the pre-pressing cylinder and the boosting cylinder through pipelines.

Wherein, the detection mechanism includes: a displacement sensor installed at the lower end of the upper platform for detecting the position of the upper platform and the lower platform so as to adjust the die-cutting speed; a pressure sensor installed at the lower end of the upper platform for detecting gas-liquid The die-cutting pressure of the die-cutter and the creasing steel wire in the die-cutting machine.

Wherein, the virtual instrument control platform includes: a computer for data analysis, processing and storage of information transmitted by the detection mechanism; a control unit for signal analysis and feedback; a display output unit for data display and output; Interface operation unit for operation control.

Wherein, the servo control device includes: a pressure control valve arranged at the air inlet of the pre-compression cylinder and the booster cylinder, which is connected with the control unit and can automatically adjust the pre-compression according to the relevant instructions of the control unit. The intake pressure of the cylinder and the pressurized cylinder; the first electromagnetic valve and the first throttle valve in the pipeline connecting the pre-compression cylinder and the working cylinder in turn are used to control and adjust the gas intake/exhaust conversion The size of the flow rate; the second electromagnetic valve and the second throttle valve in the pipeline connected to the booster cylinder and the working cylinder are arranged in turn, and are used to control the conversion of intake/exhaust and adjust the size of the gas flow rate; installed in The pressure servo valve at the hydraulic input end of the working cylinder is equipped with a pressure sensor for detecting and controlling the pressure in the hydraulic pipeline.

Further, the servo control device further includes a time relay for automatically adjusting the holding time.

In particular, an amplification filter is provided between the pressure sensor and the data acquisition system.

Further, an A/D converter is provided between the displacement sensor and the data acquisition system.

Preferably, the actuator includes a pre-compression cylinder, a pressurization cylinder and a working cylinder.

Preferably, the support structure includes: a lower support frame; a pair of wall panels fixed on both sides of the lower support frame, wherein the upper platform is fixed on the upper part of the pair of wall panels; fixed between the pair of wall panels And close to the upper support frame of the lower support frame, and the working cylinder is fixed on the upper support frame.

Compared with the prior art, the virtual instrument-based gas-liquid pressurized die-cutting machine pressure measurement and control device of the present invention has the following beneficial effects:

1) A displacement sensor is installed on the upper platform of the gas-liquid pressurized die-cutting machine of the present invention, which detects the relative position of the upper platform and the lower platform, thereby controlling the pressure of the pneumatic system to achieve the purpose of adjusting the die-cutting speed;

2) A pressure sensor is installed on the upper platform of the gas-liquid pressurized die-cutting machine of the present invention, which can detect the die-cutting pressure of the die-cutter and the indentation steel wire in the gas-liquid pressurized die-cutting machine in real time;

3) A servo valve is installed at the nozzle of the gas-liquid pressurized die-cutting machine of the present invention, and a pressure sensor is installed in the servo valve, which can detect and control the pressure in the oil pipe in real time;

4) The data acquisition system of the present invention is connected with the displacement sensor and the pressure sensor, and can collect displacement and pressure signals in real time and transmit the signals;

5) The virtual instrument control platform of the present invention has a computer and a control unit, which can receive and process the pressure and displacement information transmitted by the data acquisition system, and simultaneously analyze and feed back the signals;

6) The servo control device of the present invention controls the actuators of the gas-liquid pressurization system to operate according to the signal fed back by the virtual instrument control platform, thereby realizing the adjustment of the die-cutting pressure;

7) The virtual instrument control platform of the present invention also has a display output unit and an interface operation unit, which can be used for data display, output and operation control respectively, thereby realizing real-time recording and processing of die-cutting pressure, and realizing adjustment Digitization and automation of the pressing process.

The present invention will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of the gas-liquid pressurized die-cutting machine pressure measurement and control device based on the virtual instrument of the present invention;

Fig. 2 is a control principle diagram of the gas-liquid pressurized die-cutting machine pressure measurement and control device based on the virtual instrument of the present invention.

Reference signs: 1, wall panel; 2, upper platform; 3, lower platform; 4, guide block; 5, drive rod; 6, upper support frame; 7, working cylinder; 8, lower support frame; 9, pressure servo Valve; 10, 12, throttle valve 15, 18, pressure control valve; 13, first solenoid valve; 14, second solenoid valve; 16, pressure cylinder; 17, pre-compression cylinder; 19 oil pipe; 20, displacement sensor; 21. Virtual instrument control platform; 22. Time relay; 23. Pressure sensor.

Detailed ways

As shown in Figure 1, the gas-liquid booster die-cutting machine pressure measurement and control device based on the virtual instrument of the present invention includes: a gas-liquid booster die-cutting machine; a detection mechanism installed on the gas-liquid booster die-cutter; The data acquisition system connected with the organization; the virtual instrument control platform 21 connected with the data acquisition system, which can receive and process the pressure and displacement information transmitted by the data acquisition system, and issue relevant control instructions; the virtual instrument control platform 21 connected with The servo control device controls the actuators in the gas-hydraulic pressurized die-cutting machine to perform corresponding actions according to the control instructions issued by the virtual instrument control platform 21 .

Specifically, as shown in Figure 1, the gas-liquid pressurized die-cutting machine includes: a support structure 1, which consists of a lower support frame 8, a pair of wall panels 1 fixed on both sides of the lower support frame 8, and a pair of wall panels fixed on a pair of walls. The upper support frame 6 is composed of 1 board and close to the lower support frame 8, wherein the upper platform 2 is fixed on the upper part of a pair of wall panels 1, and the working cylinder 7 is fixed on the upper support frame 6; fixed on the support structure 1 The upper platform 2 at the upper end; the lower platform 3 that slides on the support structure 1 and is located below the upper platform 2; the gas-liquid booster mechanism supported by the support structure 1, the gas-liquid booster mechanism includes: a working cylinder 7 and a working cylinder 7, the driving rod 5 passing through the top and connected to the bottom of the lower platform 3, wherein the working cylinder 7 is connected to the pre-compression cylinder 17 and the booster cylinder 16 respectively through pipelines.

A detection mechanism is installed on the gas-liquid pressurized die-cutting machine, which includes: a displacement sensor 20 installed at the lower end of the upper platform 2 for detecting the relative position of the upper platform and the lower platform so as to adjust the die-cutting speed; The pressure sensor at the lower end is used to detect the die-cutting pressure of the die-cutting knife and the indentation steel wire in the gas-hydraulic pressurized die-cutting machine; An A/D converter is provided between the data acquisition systems, so that the information transmitted by the displacement sensor and the pressure sensor is transmitted to the virtual instrument control platform 21 through the data acquisition system, and the virtual instrument control platform 21 issues relevant control instructions to the connected The servo control device, the servo control device controls the three actuators of the pre-compression cylinder 17, the pressurization cylinder 16 and the working cylinder 7 in the gas-hydraulic pressurized die-cutting machine to perform corresponding actions.

As shown in Figure 2, the virtual instrument control platform 21 of the present invention includes: a computer for data analysis, processing and storage of the information transmitted by the detection mechanism; a control unit for signal analysis and feedback; for data display and Output display output unit; interface operation unit for operation control. The virtual instrument control platform 21 quickly adjusts the control parameters through the LabVIEW interface, obtains the system response curve, completes the calibration of the static and dynamic characteristics of the pressure control system, and establishes a mathematical model of the mapping relationship between the pressure of the gas-liquid booster system and the actual die-cutting working pressure function , to determine the die-cutting pressure control algorithm, so as to realize the pressure detection and pressure control, display, save, control parameter setting and other functions of the die-cutting process.

The control unit in the virtual instrument control platform 21 feeds the analyzed signal back to the servo control device, which controls the actuators in the gas-hydraulic pressurized die-cutting machine to perform corresponding actions according to the received control instructions. The servo control device includes: pressure control valves 18, 15 arranged at the air inlets of the pre-compression cylinder 17 and the booster cylinder 16, which are connected with the control unit and can automatically adjust the pre-compression cylinder 17 and booster cylinder according to the relevant instructions of the control unit. The intake pressure of the pressure cylinder 16; the first electromagnetic valve 13 and the first throttle valve 10, which are arranged in turn in the pipeline connecting the pre-compression cylinder 17 and the working cylinder 7, are respectively used to control and adjust the gas intake/exhaust conversion The size of the flow rate; the second solenoid valve 14 and the second throttle valve 12 arranged in turn in the pipeline connecting the booster cylinder 16 and the working cylinder 7 are respectively used to perform the conversion control of the intake/exhaust and adjust the size of the gas flow; The pressure servo valve 9 installed at the hydraulic input end of the working cylinder 7 is equipped with a pressure sensor for detecting and controlling the pressure in the hydraulic pipeline.

In addition, the servo control device also includes a time relay for automatically adjusting the holding time.

Although the present invention has been described in detail above, the present invention is not limited thereto, those skilled in the art can make modifications according to the principle of the present invention, therefore, all various modifications carried out according to the principle of the present invention should be understood as into the protection scope of the present invention.

Claims (10)

1. the gas-liquid pressure-boosting die-cutting machine pressure monitoring and controlling device based on virtual instrument is characterized in that, comprising:

The gas-liquid pressure-boosting die-cutting machine;

Be installed in the testing agency on the gas-liquid pressure-boosting die-cutting machine;

The data collecting system that links to each other with testing agency;

The virtual instrument control platform (21) that links to each other with data collecting system, the pressure that it can receive and the deal with data acquisition system is transmitted and the information of displacement, and send relevant control instruction;

With the Servocontrol device that virtual instrument control platform (21) links to each other, it is controlled the executive component that control instruction that platform (21) sent controls in the gas-liquid pressure-boosting die-cutting machine according to virtual instrument and carries out corresponding action.

2. the gas-liquid pressure-boosting die-cutting machine pressure monitoring and controlling device based on virtual instrument according to claim 1 is characterized in that said gas-liquid pressure-boosting die-cutting machine comprises:

Supporting construction (1);

Be fixed on the upper mounting plate (2) of supporting construction (1) upper end;

On supporting construction (1), slide and be positioned at the lower platform (3) below the upper mounting plate (2);

Gas-liquid pressure-boosting mechanism by supporting construction (1) support; This gas-liquid pressure-boosting mechanism comprises: working cylinder (7) and the drive rod (5) that is passed by working cylinder (7) top and be connected with said lower platform (3) bottom, wherein working cylinder (7) links to each other with pressurized cylinder (16) with precompression cylinder (17) respectively through pipeline.

3. the gas-liquid pressure-boosting die-cutting machine pressure monitoring and controlling device based on virtual instrument according to claim 1 and 2 is characterized in that said testing agency comprises:

Be installed in the displacement transducer (20) of upper mounting plate (2) lower end, the position that is used to detect upper mounting plate (2) and lower platform is so that carry out the adjustment of cross cutting speed;

Be installed in the pressure sensor (23) of upper mounting plate (2) lower end, be used for detecting the cross cutting pressure of gas-liquid pressure-boosting die-cutting machine die-cutting rule and impression steel wire.

4. the gas-liquid pressure-boosting die-cutting machine pressure monitoring and controlling device based on virtual instrument according to claim 3 is characterized in that, said virtual instrument control platform (21) comprising:

The information that testing agency transmitted is carried out the computer of data analysis, processing and storage;

Be used to carry out the control module of signal analysis and feedback;

Being used to carry out data shows and the demonstration output unit of exporting;

The interface operation unit that is used to control.

5. the gas-liquid pressure-boosting die-cutting machine pressure monitoring and controlling device based on virtual instrument according to claim 1 is characterized in that said Servocontrol device comprises:

Be located at the pressure-control valve (18,15) of the air inlet of said precompression cylinder (17) and pressurized cylinder (16), it links to each other with said control module and can be according to the automatic admission pressure of regulating said precompression cylinder (17) and pressurized cylinder (16) of the dependent instruction of control module;

Be located at successively and connect said precompression cylinder (17) and ducted first magnetic valve of working cylinder (7) (13) and first throttle valve (10), be respectively applied for and carry out the control that import/exhaust changes and the size of adjustments of gas flow;

Be located at successively and connect said pressurized cylinder (16) and ducted second magnetic valve of working cylinder (7) (14) and second choke valve (12), be respectively applied for the conversion and control of carrying out import/exhaust and the size of adjustments of gas flow;

Be installed in the pressure servo valve (9) of the hydraulic pressure input of working cylinder (7), pressure sensor is housed in it, be used for detecting and controlling the pressure of conduit under fluid pressure.

6. the gas-liquid pressure-boosting die-cutting machine pressure monitoring and controlling device based on virtual instrument according to claim 5 is characterized in that said Servocontrol device also comprises the time relay (22) that is used for regulating automatically the dwell time.

7. the gas-liquid pressure-boosting die-cutting machine pressure monitoring and controlling device based on virtual instrument according to claim 4 is characterized in that, is provided with amplifilter between said pressure sensor and the data collecting system.

8. the gas-liquid pressure-boosting die-cutting machine pressure monitoring and controlling device based on virtual instrument according to claim 4 is characterized in that, is provided with A/D converter between said displacement transducer and the data collecting system.

9. the gas-liquid pressure-boosting die-cutting machine pressure monitoring and controlling device based on virtual instrument according to claim 1 is characterized in that said executive component comprises precompression cylinder (17), pressurized cylinder (16) and working cylinder (7).

10. the gas-liquid pressure-boosting die-cutting machine pressure monitoring and controlling device based on virtual instrument according to claim 1 is characterized in that said supporting construction comprises:

Following bracing frame (8);

Be installed in down a pair of wallboard (1) of bracing frame (8) both sides, wherein, said upper mounting plate (2) is fixedly arranged on the top of a pair of wallboard (1);

Be fixedly arranged between a pair of wallboard (1) and near the upper support frame (6) of bracing frame (8) down, and said working cylinder (7) is fixedly arranged on the upper support frame (6).

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