Pneumatic riveter control device based on pressure sensor and using method

Abstract

The invention provides a pneumatic riveter control device based on a pressure sensor and a using method, and the pneumatic riveter control device based on the pressure sensor comprises a top iron end sensor module, a striking execution module, a display module and a control module, the jacking iron end sensor module comprises jacking iron and a pressure sensor mounted on the jacking iron, and the pressure sensor is used for detecting force applied by a riveting worker; the striking execution module, the display module and the control module are integrated on the circuit board, the integrated circuit board is placed in the control box, and the striking execution module and the control module are respectively in circuit connection with the pressure sensor. In the using process of the pneumatic riveter control device, various parameters of a riveting task are input through the display module, the control module controls the beating execution module to respond to the riveting task according to the input parameters, and then the jacking force and the beating frequency of each time of riveting are controlled to be the same; therefore, the consistency of the quality of the manual hammer riveting joint is improved and ensured.

Description

Technical Field

[0001] The present invention relates to the field of pneumatic hammer riveting, and in particular to a pneumatic riveting gun control device based on a pressure sensor and a use method thereof. Background Art

[0002] Riveting is a commonly used connection method in aircraft assembly. Depending on the actual working conditions, it can be roughly divided into automatic drilling and riveting and manual riveting. In actual aircraft production, due to the specificity of site conditions and aircraft structural characteristics, a combination of automatic drilling and riveting and manual riveting is often used.

[0003] Currently, large foreign aircraft companies have adopted automatic drilling and riveting technology for aircraft production. Automatic drilling and riveting technology has the characteristics of good quality consistency and high assembly efficiency. It is mainly used in areas with open space, a large number of rivets, and regular arrangement, such as straight sections of the aircraft. However, for areas with limited space, riveted assembly surfaces with gradual changes, and areas with more complex curves, such as the nose and tail sections of the aircraft, manual riveting is still required to complete the assembly production work. Compared with machine riveting, manual riveting has the advantages of low equipment cost, flexible riveting methods, small riveting operation space requirements, and weak mutual influence of multiple riveting. Therefore, it can well meet the needs of riveting assembly production in specific locations of the aircraft.

[0004] Unlike machine riveting, manual riveting involves a worker holding a rivet gun and controlling a hammer to repeatedly impact the rivet, causing elastic or plastic deformation at the tail of the rivet, ultimately forming the rivet head. Factors such as the input pressure, the tightening force, and the number of impacts directly impact the quality of the rivet.

[0005] With the continuous development of domestic large aircraft, the successful service of C919 and the continuous research and development of C929 large long-range wide-body passenger aircraft, the demand for riveting skills is also increasing. How to enable riveting workers to perform riveting with high efficiency, high flexibility and high consistency has become a difficult problem. Summary of the Invention

[0006] To address the above technical issues, the present invention provides a pneumatic rivet gun control device and method for use based on a pressure sensor. By collecting, identifying, and processing sensor signals, the pneumatic rivet gun control device maintains the same tightening force and number of strikes per riveting operation, thereby improving the consistency of the quality of hand-hammer riveted joints.

[0007] The present invention provides a pneumatic rivet gun control device based on a pressure sensor, which includes: a top iron end sensor module, a striking execution module, a display module and a control module, wherein the top iron end sensor module includes a top iron and a pressure sensor installed on the top iron, and the pressure sensor is used to detect the force applied by the riveting worker; the striking execution module, the display module and the control module are integrated on a circuit board, and the integrated circuit board is placed in a control box, and the striking execution module and the control module are respectively connected to the pressure sensor circuit.

[0008] The pressure sensor-based pneumatic riveter control device provided by the present invention may also have the following feature: a power supply is installed in the control box, and the power supply is connected to the control module circuit.

[0009] The pressure sensor-based pneumatic rivet gun control device provided by the present invention may also have the following feature: the striking execution module includes a relay and a digital-to-analog converter for controlling the size and on-off of the rivet gun's air intake.

[0010] The pressure sensor-based pneumatic riveter control device provided by the present invention may also have the following feature: the display module includes an LCD screen for displaying and inputting various parameters required for the riveting task.

[0011] In the pressure sensor-based pneumatic rivet gun control device provided by the present invention, it can also have the following features: the control module includes a single-chip microcomputer, which collects, identifies and processes the signals of the thin film pressure sensor, the acceleration sensor, and the parameters input by the display module through the built-in chip, and controls the striking execution module to respond.

[0012] The pressure sensor-based pneumatic rivet gun control device provided by the present invention may also have the following features: the control module adopts an average value filtering algorithm and a threshold value algorithm to realize the recognition of the tightening force and the number of strikes.

[0013] The pressure sensor-based pneumatic rivet gun control device provided by the present invention may also have the following feature: the control module uses a memory card and a storage algorithm to store data on the tightening force and the number of strikes.

[0014] The pressure sensor-based pneumatic riveting gun control device provided by the present invention may also have the following feature: the circuit board is connected to the pressure sensor via a signal line.

[0015] In addition, the present invention also provides a method for using the above-mentioned pressure sensor-based pneumatic rivet gun control device, comprising the following steps:

[0016] Step 1: Turn on the power and wait for initialization;

[0017] Step 2: Enter parameters on the display module;

[0018] Step 3: Two riveters hold the rivet gun and the jacking iron respectively and start tightening at the same time;

[0019] Step 4: When the tightening force is reached, the rivet gun starts to strike;

[0020] Step 5: Stop hitting immediately when the hitting number is reached, and the actual hitting number will be displayed on the module;

[0021] Step 6: After the stroke is completed, the program automatically resets and waits for the next stroke.

[0022] The beneficial effects of the present invention are:

[0023] The pressure sensor-based pneumatic riveter control device of the present invention includes a top-iron sensor module, a strike execution module, a display module, and a control module. The top-iron sensor module includes a top iron and a pressure sensor mounted thereon, which detects the force applied by the riveter. The strike execution module, display module, and control module are integrated on a circuit board, which is then mounted in a control box. Furthermore, the strike execution module and control module are each connected to the pressure sensor circuit.

[0024] Based on the above-mentioned pneumatic rivet gun control device, during the use of the pneumatic rivet gun control device, various parameters of the riveting task are input through the display module. Then, the control module controls the striking execution module to respond to the riveting task according to the input parameters, and then controls the tightening force of each riveting to be the same as the number of strikes, so as to improve and ensure the consistency of the quality of manually hammered riveted joints.

[0025] In addition, the pneumatic rivet gun control device can not only be used in formal riveting tasks, but also can be used in the training of riveting skilled workers, so that skilled workers can get started with riveting tasks more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the pneumatic rivet gun control device based on the pressure sensor in this embodiment;

[0027] Figure 2 1 is an exploded view of a pneumatic rivet gun control device based on a pressure sensor in this embodiment;

[0028] Figure 3 is a structural block diagram of a pneumatic rivet gun control device based on a pressure sensor in this embodiment;

[0029] Figure 4 Schematic diagram of the structure of the top iron end pressure sensor module in this embodiment;

[0030] Figure 5 FIG. 4 is an exploded diagram of the top iron end pressure sensor module in this embodiment. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The pressure sensor-based pneumatic rivet gun control device in this embodiment is used in manual hammer riveting tasks and can ensure the consistency of the quality of manually hammer riveted joints.

[0033] like Figures 1 to 5 As shown, the pressure sensor-based pneumatic rivet gun control device in this embodiment includes a top iron end pressure sensor module, a striking execution module, a display module and a control module.

[0034] like Figure 4 、 5 As shown, the top iron end pressure sensor module 10 includes a top iron tightening end 11, a pressure sensor 12, and a top iron handheld end 13. One end of the pressure sensor 12 is connected to the top iron tightening end 11, and the other end is connected to the top iron handheld end 13. The pressure sensor 12 detects the pressure signal applied by the riveter when holding the rivet gun. This pressure signal is the tightening force.

[0035] The strike execution module, display module, and control module are integrated on a PCB 21, which is mounted within a control box 22. A power supply 23 is also housed within the control box 22, connected to the PCB 21 via a power circuit. A signal receiving port 24 is provided on one outer end of the control box 22, which is connected to the pressure sensor 12 via a signal line.

[0036] The control module includes an STM32 microcontroller with an STM32F407ZGT6 chip. This chip is connected to an SD memory card, a buzzer circuit, and an analog-to-digital converter. The analog-to-digital converter is connected to the pressure sensor 12 via an AD620 amplifier circuit, a signal receiving port, and a signal line. This allows the converter to collect, identify, and process signals from the pressure sensor 12. Furthermore, the chip can collect, identify, and process parameters input by the display module.

[0037] The control module processes the signals collected by the pressure sensor 12 using an average filtering algorithm and a threshold algorithm to identify the tightening force and the number of strikes. The SD memory card and the storage algorithm are then used to store the data.

[0038] The striking execution module includes a relay, a digital-to-analog converter and a pneumatic riveting gun connected to the relay and the digital-to-analog converter, and is used to control the size and on-off of the air intake of the riveting gun.

[0039] The model of the digital-to-analog converter is DAC8562. The digital-to-analog converter is connected to the PCB board 21 via a DAC conversion circuit, and then connected to the pneumatic riveting gun via an electrical proportional valve 31.

[0040] The relay is connected to the PCB board 21 through the relay circuit, and then connected to the pneumatic riveting gun through the solenoid valve 41.

[0041] The display module is an LCD touch screen 51 , which is internally connected to the PCB board 21 , and an external display portion is provided on the top surface of the control box 22 for displaying and inputting various parameters required for the riveting task.

[0042] The pneumatic rivet gun and the top iron constitute the execution structure of riveting. When the control module receives the riveting task parameters input by the display module, it controls the pneumatic rivet gun to respond to the riveting task by hitting the execution module to implement the riveting task.

[0043] The method of using the pneumatic rivet gun control device based on the pressure sensor is as follows:

[0044] Step 1: Turn on the power and wait for initialization;

[0045] Step 2: Enter parameters on the display module;

[0046] Step 3: Two riveters hold the rivet gun and the jacking iron respectively and start tightening at the same time;

[0047] Step 4: When the tightening force is reached, the rivet gun starts to strike;

[0048] Step 5: Stop hitting immediately when the hitting number is reached, and the actual hitting number will be displayed on the module;

[0049] Step 6: After the stroke is completed, the program automatically resets and waits for the next stroke.

[0050] The pressure sensor-based pneumatic rivet gun control device according to the above embodiment includes a top-iron sensor module, a strike execution module, a display module, and a control module. The top-iron sensor module includes a top iron and a pressure sensor mounted thereon, which detects the force applied by the riveter. The strike execution module, display module, and control module are integrated on a circuit board, which is then mounted in a control box. Furthermore, the strike execution module and control module are each connected to the pressure sensor circuit.

[0051] Based on the above-mentioned pneumatic rivet gun control device, during the use of the pneumatic rivet gun control device, various parameters of the riveting task are input through the display module. Then, the control module controls the striking execution module to respond to the riveting task according to the input parameters, and then controls the tightening force of each riveting to be the same as the number of strikes, so as to improve and ensure the consistency of the quality of manually hammered riveted joints.

[0052] In addition, the pneumatic rivet gun control device can not only be used in formal riveting tasks, but also can be used in the training of riveting skilled workers, so that skilled workers can get started with riveting tasks more quickly.

[0053] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A pneumatic rivet gun control device based on a pressure sensor, characterized in that: include: Top iron end sensor module, striking execution module, display module and control module, The top iron end sensor module includes a top iron and a pressure sensor mounted on the top iron, and the pressure sensor is used to detect the force applied by the riveting worker; The striking execution module, the display module, and the control module are integrated on a circuit board, and the integrated circuit board is placed in a control box. The striking execution module and the control module are respectively connected to the pressure sensor circuit.

2. The pneumatic rivet gun control device based on a pressure sensor according to claim 1, characterized in that: A power supply is also installed in the control box, and the power supply is connected to the control module circuit.

3. The pneumatic rivet gun control device based on a pressure sensor according to claim 1, characterized in that: The striking execution module includes a relay and a digital-to-analog converter, which are used to control the size and on-off of the rivet gun's air intake.

4. The pneumatic rivet gun control device based on a pressure sensor according to claim 1, characterized in that: The display module includes an LCD screen for displaying and inputting various parameters required for the riveting task.

5. The pneumatic rivet gun control device based on a pressure sensor according to claim 1, characterized in that: The control module includes a single chip microcomputer, which collects, identifies and processes the signal of the pressure sensor and the parameters input by the display module through a built-in chip, and controls the striking execution module to respond.

6. The pneumatic rivet gun control device based on a pressure sensor according to claim 1, characterized in that: The control module adopts an average value filtering algorithm and a threshold algorithm to realize the recognition of the tightening force and the number of strikes.

7. The pneumatic rivet gun control device based on a pressure sensor according to claim 1, characterized in that: The control module adopts a memory card and a storage algorithm to realize data storage of the tightening force and the number of strikes.

8. The pneumatic rivet gun control device based on a pressure sensor according to claim 1, characterized in that: The circuit board is connected to the pressure sensor via a signal line.

9. A method for using the pressure sensor-based pneumatic riveter control device according to any one of claims 1 to 8: Step 1: Turn on the power and wait for initialization; Step 2: Enter parameters on the display module; Step 3: Two riveters hold the rivet gun and the jacking iron respectively and start tightening at the same time; Step 4: When the tightening force is reached, the rivet gun starts to strike; Step 5: Stop hitting immediately when the hitting number is reached, and the actual hitting number will be displayed on the module; Step 6: After the stroke is completed, the program automatically resets and waits for the next stroke.

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