Split type hydraulic rivet-pulling monitoring device, rivet-pulling gun and automatic rivet-pulling production line

Abstract

The utility model discloses a split type hydraulic riveting monitoring device which comprises a body, a pressure sensor and a displacement sensor. Wherein a first oil cavity and an air cavity are formed in the body; a first piston is arranged in the oil cavity, and the first oil cavity is communicated with an oil cavity of the hand riveter through an oil pipe; a second piston is arranged in the air cavity, is connected with the first piston and can drive the first piston to reciprocate; the air cavity is communicated with an external air pump; the pressure sensor is communicated with the first oil cavity; the displacement sensor is connected with the body, and a pull rod is connected with the second piston and used for detecting displacement of the second piston. The utility model further discloses a hand riveter and an automatic hand riveting production line. According to the utility model, the pressure sensor and the displacement sensor are integrated in the independent body structure, so that the problem of space interference caused by dispersedly arranging the sensors on the hand riveter is avoided, the hand riveter can adapt to an automatic production line and a complex environment with limited space, and the application scene is effectively widened.

Description

Technical Field

[0001] This utility model relates to the field of riveting equipment technology, and in particular to a split-type hydraulic riveting monitoring device, a riveting gun, and an automated riveting production line. Background Technology

[0002] Rivet nuts and bolt caps are widely used in the fastening of electromechanical and light industrial products such as automobiles, aviation, instruments, furniture, and decoration. Especially in the automotive manufacturing industry, the assembly of important parts such as the car body requires screw connections, and most of these assembly fastening points are achieved by rivet nuts.

[0003] The manual rivet nut operation involves inserting the rivet nut into a pre-drilled hole on the workpiece surface, then screwing the rivet gun's screw clockwise into the nut and pulling it out once to allow the nut to expand within the pre-drilled hole. The screw is then reversed counter-clockwise to withdraw the rivet gun. In existing systems, hydraulic oil is injected into the hydraulic chamber, pushing the piston outwards. This piston then pushes the screw backwards against the gun body. The oil is then released from the chamber, causing a return spring on the rear of the screw to push the piston back to its original position.

[0004] However, the quality and efficiency of riveting are affected by various factors, such as the pressure and displacement parameters during the riveting process. Failure to accurately monitor these parameters may lead to unstable quality of the riveted joint, resulting in problems such as loosening and breakage, thus affecting the overall performance and reliability of the product.

[0005] Patent document CN 116922064 A discloses a riveting tool and method with error-proof monitoring function. It includes a rivet gun, a laser detection mechanism, a stroke detection mechanism, and a pressure detection mechanism. The rivet gun includes a gun body, a rivet screw, a pull-out mechanism, and a drive mechanism. A laser sensor is located at the front end of the gun body. The rivet screw is located inside the gun body. The drive mechanism is connected to the tail end of the rivet screw, and the top end of the rivet screw extends out of the gun body. A baffle is provided at the tail end of the rivet screw. The pull-out mechanism includes a return spring and an oil chamber, located on the left and right sides of the baffle, respectively. The return spring and the oil chamber press the rivet screw at both ends. An oil filling and discharging mechanism is provided at the bottom of the oil chamber, and an oil pressure outlet pipe is connected to the top of the oil chamber. A stroke detection sensor is also provided inside the gun body. This tool can detect the quantity and quality of qualified rivet nuts, improving riveting efficiency and quality. The document describes a method for detecting the rivet length and shrinkage of the rivet nut using a stroke detection mechanism, and for monitoring the pressure within the oil chamber using a pressure sensor, allowing for real-time monitoring of the rivet gun's operation. However, because the pressure sensor and stroke detection mechanism are located at the front and middle of the rivet gun respectively, this method is effective when the rivet gun is in a space-constrained environment, but it can be hindered or even prevented from rivetizing in automated production lines or other confined spaces. Summary of the Invention

[0006] According to an embodiment of the present invention, a split-type hydraulic riveting monitoring device is provided, comprising:

[0007] The main body contains a first oil chamber and a gas chamber.

[0008] A first piston is installed in the first oil chamber, and the first oil chamber is connected to the oil chamber of the rivet gun through an oil pipe.

[0009] A second piston is installed inside the air chamber, and the second piston is connected to the first piston, which can drive the first piston to reciprocate; the air chamber is connected to an external air pump, and the air pump can drive the second piston to reciprocate inside the air chamber.

[0010] A pressure sensor is connected to the first oil chamber and is used to detect the oil pressure in the first oil chamber;

[0011] The displacement sensor is connected to the main body, and its pull rod is connected to the second piston to detect the displacement of the second piston.

[0012] Furthermore, the signal output terminals of the CPU, pressure sensor, and displacement sensor are respectively connected to the signal input terminal of the CPU.

[0013] Furthermore, the second piston is connected to the first piston via a connecting rod.

[0014] Furthermore, a sealing ring is provided on the second piston, and the sealing ring is located between the second piston and the inner wall of the air chamber.

[0015] Furthermore, a sealing ring is provided on the first piston, and the sealing ring is located between the first piston and the inner wall of the first oil chamber.

[0016] According to another embodiment of the present invention, a rivet gun is provided, which includes the split hydraulic rivet monitoring device of the previous embodiment.

[0017] According to another embodiment of the present invention, an automated riveting production line is provided, comprising a plurality of riveting guns from the previous embodiment.

[0018] The beneficial effects of this utility model are:

[0019] The split-type hydraulic riveting monitoring device integrates pressure and displacement sensors into an independent main body structure, avoiding spatial interference problems caused by dispersing sensors on the riveting gun. This allows it to adapt to automated production lines and complex environments with limited space, effectively broadening its application scenarios.

[0020] The rivet gun includes this monitoring device, which enables the rivet gun to have real-time monitoring capabilities, improves the performance and intelligence level of the rivet gun, and meets the requirements of high-precision and high-quality rivet making.

[0021] An automated riveting production line includes multiple riveting guns equipped with monitoring devices, which can comprehensively monitor the riveting process of the entire production line, ensuring the consistency and stability of the production process, improving production efficiency and product quality, and reducing production costs.

[0022] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the split hydraulic riveting monitoring device according to an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the split hydraulic riveting monitoring device according to an embodiment of the present invention after the oil pipe has been removed;

[0025] Figure 3 for Figure 2 The right view;

[0026] Figure 4 for Figure 3 Sectional view along axis AA;

[0027] Figure 5 for Figure 3 BB-direction sectional view;

[0028] Figure 6 This is a structural schematic diagram of a rivet gun according to an embodiment of the present utility model. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0030] First, combine Figures 1-6 The present invention describes a split-type hydraulic riveting monitoring device according to an embodiment of the present invention, which is used in the riveting process and has a wide range of applications.

[0031] like Figures 1-6 As shown, the split-type hydraulic riveting monitoring device of this utility model embodiment includes:

[0032] Body 1, which contains a first oil chamber 11 and an air chamber 12;

[0033] The first oil chamber 11 is equipped with a first piston 3, and the first oil chamber 11 is connected to the oil chamber of the rivet gun 8 through the oil pipe 3.

[0034] A second piston 4 is provided in the air chamber 12. The second piston 4 is connected to the first piston 3 and can drive the first piston 3 to reciprocate. The air chamber 12 is connected to an external air pump, which can drive the second piston 4 to reciprocate within the air chamber 12.

[0035] Pressure sensor 5 is connected to the first oil chamber 11 and is used to detect the oil pressure in the first oil chamber 11.

[0036] Displacement sensor 6 is connected to the main body 1, and its pull rod is connected to the second piston 4 to detect the displacement of the second piston 4.

[0037] Preferably, in this embodiment, the oil pipe 3 is a flexible hose that can be bent.

[0038] Furthermore, in this embodiment, a CPU is also provided, and the signal output terminals of the pressure sensor 5 and the displacement sensor 6 are respectively connected to the signal input terminal of the CPU. The CPU can receive the signals collected by the pressure sensor 5 and the displacement sensor 6, and process and analyze the signals, thereby realizing intelligent monitoring and control of the riveting process.

[0039] Furthermore, such as Figure 4 As shown, in this embodiment, the second piston 4 is connected to the first piston 3 via a connecting rod 7.

[0040] Furthermore, in this embodiment, a sealing ring (not shown in the figure) is provided on the second piston 4, and the sealing ring is disposed between the second piston 4 and the inner wall of the gas chamber 12. A sealing ring (not shown in the figure) is provided on the first piston 3, and the sealing ring is disposed between the first piston 3 and the inner wall of the first oil chamber 11. The sealing rings can effectively prevent the leakage of gas and hydraulic oil, ensuring the normal operation of the device and the accuracy of parameter monitoring.

[0041] Working Principle: When using the split-type hydraulic riveting monitoring device, an external air pump inputs gas into the air chamber 12, driving the second piston 4 to reciprocate within the air chamber 12. Since the second piston 4 is connected to the first piston 3 via a connecting rod, the movement of the second piston 4 drives the first piston 3 to reciprocate within the first oil chamber 11. The first oil chamber 11 is connected to the oil chamber of the riveting gun 8 via an oil pipe 3. The movement of the first piston 3 causes hydraulic oil to enter or leave the oil chamber of the riveting gun 8 from the oil pipe 3, thereby driving the riveting gun 8 to perform the riveting operation.

[0042] During the riveting process, pressure sensor 5 monitors the oil pressure in the first oil chamber 11 in real time; the magnitude of the oil pressure reflects the magnitude of the riveting force. Displacement sensor 6 detects the displacement of the second piston 4 via a pull rod; this displacement is related to the riveting stroke of the riveting gun 8. Pressure sensor 5 and displacement sensor 6 transmit the detected signals to the CPU, which processes and analyzes these signals to determine whether the riveting process is normal based on preset parameter ranges. If an abnormality occurs, the CPU can issue an alarm signal or control the air pump, riveting gun 8, and other equipment to make corresponding adjustments to ensure riveting quality.

[0043] like Figure 6 As shown, according to another embodiment of the present invention, a rivet gun 8 is provided, which includes the split hydraulic rivet monitoring device of the previous embodiment.

[0044] Working principle: The oil pipe 3 of the split-type hydraulic riveting monitoring device is connected to the oil chamber of the riveting gun 8, and is also connected to other related pipelines and lines. When the first piston 3 reciprocates, it drives the hydraulic oil in the first oil chamber 11 to enter and exit the oil chamber of the riveting gun 8, thereby driving the riveting head of the riveting gun 8 to perform the riveting action. During the riveting process, the pressure sensor 5 and the displacement sensor 6 collect data in real time and transmit it to the CPU. The CPU processes and analyzes the data to monitor the riveting process and detect any abnormalities in pressure and displacement during the riveting process.

[0045] According to another embodiment of the present invention, an automated riveting production line is provided, comprising a plurality of riveting guns 8 of the previous embodiment.

[0046] Above, refer to Figures 1-6 The present invention describes a split hydraulic riveting monitoring device according to an embodiment of the present invention. By integrating the pressure sensor 5 and the displacement sensor 6 into an independent body 1 structure, the spatial interference problem caused by dispersing the sensors on the riveting gun 8 is avoided, making it adaptable to automated production lines and complex environments with limited space, and effectively broadening the application scenarios.

[0047] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes that element.

[0048] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A split-type hydraulic riveting monitoring device, characterized in that, Include: The main body is provided with a first oil cavity and a gas cavity; A first piston is provided in the first oil chamber, and the first oil chamber is connected to the oil chamber of the rivet gun through an oil pipe; A second piston is provided inside the air chamber, and the second piston is connected to the first piston, which can drive the first piston to reciprocate; the air chamber is connected to an external air pump, and the air pump can drive the second piston to reciprocate inside the air chamber. A pressure sensor, which is connected to the first oil chamber, is used to detect the oil pressure in the first oil chamber; A displacement sensor is connected to the main body, and its pull rod is connected to the second piston for detecting the displacement of the second piston.

2. The split-type hydraulic riveting monitoring device as described in claim 1, characterized in that, It is also equipped with a CPU, and the signal output terminals of the pressure sensor and the displacement sensor are respectively connected to the signal input terminal of the CPU.

3. The split-type hydraulic riveting monitoring device as described in claim 1, characterized in that, The second piston is connected to the first piston via a connecting rod.

4. The split-type hydraulic riveting monitoring device as described in claim 1, characterized in that, The second piston is provided with a sealing ring, which is disposed between the second piston and the inner wall of the air chamber.

5. The split-type hydraulic riveting monitoring device as described in claim 1, characterized in that, A sealing ring is provided on the first piston, and the sealing ring is disposed between the first piston and the inner wall of the first oil chamber.

6. A rivet gun, characterized in that, It includes the split-type hydraulic riveting monitoring device as described in any one of claims 1.

7. An automated riveting production line, characterized in that, It includes several rivet guns as described in claim 6.

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