Rivet pressing equipment

Abstract

The utility model relates to rivet pressing equipment which comprises a rivet pressing mechanism, a rivet pressing mechanism, a rivet pressing mechanism and a rivet pressing mechanism, wherein the rivet pressing mechanism is used for pressing and riveting a rivet onto a product to be pressed and riveted to form a pressed and riveted product; the rivet pressing mechanism comprises a rivet pressing lower die, a rivet pressing upper die and a servo electric cylinder, and a pressure sensor is arranged in the servo electric cylinder; the loading and unloading mechanism is used for placing a to-be-riveted product and taking out the riveted product by an operator; the material moving mechanism is used for moving the to-be-riveted product from the feeding and discharging mechanism to the riveting mechanism and moving the riveted product from the riveting mechanism to the feeding and discharging mechanism; the rivet bin is used for storing the rivets and is provided with a discharging opening used for outputting the rivets; the rivet feeding mechanism is used for taking out the rivets from the rivet bin and transferring the rivets to the rivet pressing mechanism; the control system is used for controlling the rivet pressing mechanism, the feeding and discharging mechanism, the material moving mechanism and the rivet feeding mechanism. According to the utility model, the servo electric steel is used as power, and the riveting pressure and the output displacement can be accurately controlled, so that the riveting quality is improved.

Description

Technical Field

[0001] This utility model relates to a riveting device that is widely used in various industries for riveting operations. Background Technology

[0002] As attached Figure 1 As shown, riveting is a method of joining two or more materials together using pressure. Its working mechanism is to achieve the connection by changing the shape between the materials. Riveting mainly involves changes in three aspects:

[0003] 1. Filling gaps: During the riveting process, the rivet or rivet shank is tightly installed between two materials, filling the gaps between them. This filling can greatly improve the strength and stability of the connection;

[0004] 2. Cold extrusion: By applying pressure, the rivet or rivet shank is compressed into a shape that deforms the material and tightly bonds it to it. This deformation increases the contact area between the materials, forming a stronger bond;

[0005] 3. Flow Deformation: Another mechanism of press riveting is to use the flow of materials to form a connection, which usually occurs in softer materials. Under pressure, the material flows and fills the gaps, forming a tight connection.

[0006] Riveting is a widely used connection technology in industry and manufacturing, and its main functions are as follows:

[0007] 1. Improved connection strength and stability: Through mechanisms such as filling gaps, cold extrusion, and flow deformation, press riveting can provide higher strength and stability when connecting materials;

[0008] 2. Achieving efficient production: Press riveting is a fast and effective connection technology that can be used in large-scale production processes;

[0009] 3. Cost savings: Compared with traditional connection technologies such as welding, riveting is generally simpler and more economical.

[0010] In summary, riveting is a practical and efficient joining technology. Its working mechanism involves filling gaps, cold extrusion, and flow deformation, and its main functions are to improve the strength and stability of the connection, achieve efficient production, and save costs.

[0011] Currently, most riveting machines on the market use hydraulic and pneumatic power, and the riveting is performed manually by holding the product by hand.

[0012] The strength of the joint between the rivet and the sheet metal after press riveting depends on the following factors: the strength of the sheet metal and the rivet, the diameter of the hole in the sheet metal, and the shape and size of the rivet teeth. Currently, most rivets on the market are mass-produced, and the size and shape of the rivet teeth cannot be fully inspected. In addition, the hole diameters of the sheet metal vary, resulting in generally poor press riveting quality and unstable rivet strength in most press riveting machines on the market. With the development of technology, the safety requirements of press-riveted products are increasing, highlighting the importance of the strength of the rivets after press riveting. Currently, press riveting machines on the market cannot effectively inspect the riveting quality, which has become a pain point in the industry. Summary of the Invention

[0013] The purpose of this invention is to provide a riveting device that can precisely control the riveting pressure and improve the riveting quality.

[0014] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0015] A riveting device, comprising:

[0016] A riveting mechanism is used to press rivets onto a product to be riveted to form a riveted product; the riveting mechanism includes a lower riveting die, an upper riveting die, and a servo electric cylinder for driving the upper riveting die to move, wherein the servo electric cylinder has a built-in pressure sensor for collecting the riveting pressure during the riveting process and outputting a corresponding pressure detection signal;

[0017] A loading and unloading mechanism for allowing operators to place the products to be riveted and to remove the products after riveting;

[0018] A material transfer mechanism for moving the product to be riveted from the loading and unloading mechanism to the riveting mechanism, and for moving the riveted product from the riveting mechanism to the loading and unloading mechanism;

[0019] A rivet bin for storing the rivets, the rivet bin having a discharge port for discharging the rivets;

[0020] A rivet feeding mechanism for retrieving the rivet from the rivet magazine and transferring the rivet to the riveting mechanism;

[0021] A control system for controlling the riveting mechanism, the loading and unloading mechanism, the material transfer mechanism, and the nail feeding mechanism.

[0022] The riveting mechanism also includes a displacement sensor for detecting the displacement of the product before and after riveting.

[0023] The loading and unloading mechanism includes multiple loading and unloading platforms that can move alternately.

[0024] The material transfer mechanism includes an XYZ axis moving platform capable of three-axis motion.

[0025] The XYZ axis moving platform includes an X-axis guide rail, an X-axis slider movably mounted on the X-axis guide rail, an X-axis driving device for driving the X-axis slider to move along the X-axis guide rail, a Y-axis guide rail mounted on the X-axis slider, a Y-axis slider movably mounted on the Y-axis guide rail, a Y-axis driving device for driving the Y-axis slider to move along the Y-axis guide rail, a Z-axis guide rail mounted on the Y-axis slider, a material transfer platform movably mounted on the Z-axis guide rail, and a Z-axis driving device for driving the material transfer platform to move along the Z-axis guide rail.

[0026] The discharge port is equipped with a length detection device for detecting the length of the rivet.

[0027] The rivet chamber is equipped with a vibratory feeder that transports the rivets to the discharge port.

[0028] The rivet feeding mechanism includes a rivet clamp for gripping the rivet and a clamping device for moving the rivet clamp.

[0029] The riveting equipment also includes an alarm device connected to the control system and which alarms when riveting is abnormal.

[0030] The riveting equipment also includes a machine base, and the riveting mechanism, the loading and unloading mechanism, the material transfer mechanism, the nail feeding mechanism, and the control system are all mounted on the machine base.

[0031] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model uses a servo electric motor as the power source, which can accurately control the riveting pressure and output displacement, thereby improving the riveting quality. Attached Figure Description

[0032] Appendix Figure 1 This is a schematic diagram of the riveting process.

[0033] Appendix Figure 2 This is a schematic diagram of the riveting equipment of this utility model.

[0034] Appendix Figure 3 This is a partial structural schematic diagram of the riveting device of this utility model.

[0035] In the attached diagrams: 1. Riveting mechanism; 2. Loading and unloading mechanism; 3. Transfer mechanism; 4. Rivet bin; 5. Rivet feeding mechanism; 6. Control system; 7. Base; 8. Upper frame; 9. Lower riveting die; 10. Upper riveting die; 11. Servo electric cylinder. Detailed Implementation

[0036] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0037] Example 1: As shown in the attached document Figure 2 To be continued Figure 3 As shown, a riveting device includes a machine base, a riveting mechanism 1, a loading and unloading mechanism 2, a material transfer mechanism 3, a rivet bin 4, a rivet feeding mechanism 5, and a control system 6.

[0038] The machine tool includes a base 7 and an upper frame 8. The upper surface of the base 7 forms the working surface of the equipment, and the upper frame 8 is installed on the upper surface of the base 7. The riveting mechanism 1, the loading and unloading mechanism 2, the material transfer mechanism 3, the rivet bin 4, and the rivet feeding mechanism 5 are all set on the working surface of the machine tool, while the control system 6 can be set on the upper frame 8 for convenient operation.

[0039] The riveting mechanism 1 is used to rivet rivets onto the product to be riveted, forming the riveted product. It includes a lower riveting die 9, an upper riveting die 10, and a servo electric cylinder 11. The lower riveting die 9 is fixed to the machine base and serves as the point of application for the riveting force. It also controls the range of motion of the rivet, ensuring the perpendicularity of the riveted rivet to the product. The upper riveting die 10 is movably positioned above the lower riveting die 9 and can rise and fall. When it descends, it cooperates with the lower riveting die 9 to complete the riveting operation. The servo electric cylinder 11 is mounted on the machine base via a mounting bracket and connected to the upper riveting die 10, thereby driving the upper riveting die 10 to move. The servo electric cylinder 11 has a built-in pressure sensor for real-time acquisition of the riveting pressure during the riveting process and outputting a corresponding pressure detection signal. The pressure sensor is connected to a pressure amplifier, which converts the analog signal output by the pressure sensor into a 0-10V electrical signal. This 0-10V signal corresponds to the tonnage range of the servo electric cylinder 11, which is 1-20T. The riveting pressure tonnage can be calculated using this electrical signal. Furthermore, the riveting mechanism 1 also includes a displacement sensor for detecting the product displacement before and after riveting. The displacement sensor can output a displacement detection signal corresponding to the detected displacement.

[0040] The loading / unloading mechanism 2 is located at the edge of the machine and is used by operators to place products to be riveted and to remove products after riveting. The loading / unloading mechanism 2 includes multiple loading / unloading platforms with drive devices that can move alternately. The loading / unloading mechanism 2 can allow products to flow out together with the tooling, thereby saving working time and allowing the next product to be placed during the riveting process.

[0041] The material transfer mechanism 3 is located between the loading / unloading mechanism 2 and the riveting mechanism 1. It is used to move the product to be riveted from the loading / unloading mechanism 2 to the riveting mechanism 1, and to move the riveted product from the riveting mechanism 1 back to the loading / unloading mechanism 2. In this embodiment, the material transfer mechanism 3 is a three-axis XYZ-axis moving platform. Specifically, the XYZ-axis moving platform includes an X-axis guide rail, an X-axis slider movably mounted on the X-axis guide rail, an X-axis driving device that drives the X-axis slider to move along the X-axis guide rail, a Y-axis guide rail mounted on the X-axis slider, a Y-axis slider movably mounted on the Y-axis guide rail, a Y-axis driving device that drives the Y-axis slider to move along the Y-axis guide rail, a Z-axis guide rail mounted on the Y-axis slider, a material transfer platform movably mounted on the Z-axis guide rail, and a Z-axis driving device that drives the material transfer platform to move along the Z-axis guide rail. The X-axis corresponds to the transverse direction on the working surface of the equipment, the Y-axis corresponds to the longitudinal direction on the working surface of the equipment, and the Z-axis corresponds to the direction perpendicular to the working surface of the equipment. Existing structures can be used to implement the above guide rails and sliders. In this embodiment, two sets of X-axis guide rails, X-axis sliders, X-axis drive devices, Y-axis guide rails, Y-axis sliders, Y-axis drive devices, Z-axis guide rails, and Z-axis drive devices are respectively arranged on both sides of the transfer platform to jointly drive the transfer platform's movement. The XYZ axis moving platform can be matched with different products and tooling through preset different points, enabling rapid product changeover.

[0042] The rivet bin 4 is located on the side of the riveting mechanism 1 and is used to store rivets, typically storing the number needed for several hours. The rivet bin 4 has a discharge port for discharging the rivets. A vibratory feeder is installed inside the rivet bin 4 to transport the rivets to the discharge port. A length detection device is installed at the discharge port to detect the rivet length, which outputs a corresponding length detection signal. When the detected rivet length does not meet the requirements (e.g., ±5mm), the length detection signal is output to trigger an alarm, preventing operators from accidentally discharging rivets.

[0043] The rivet feeding mechanism 5 is located between the rivet magazine 4 and the riveting mechanism 1. It is used to take out the rivet from the rivet magazine 4 and move the rivet to the area below the riveting die 10 in the riveting mechanism 1. For example, the rivet feeding mechanism 5 includes a rivet clamp for gripping the rivet and a clamping device for moving the rivet clamp.

[0044] The control system 6 controls the riveting mechanism 1, the loading / unloading mechanism 2, the transferring mechanism 3, and the nail feeding mechanism 5. It is electrically connected to the servo electric cylinder 11, pressure amplifier, displacement sensor, drive device for the loading / unloading platform, X-axis drive device, Y-axis drive device, Z-axis drive device, and clamping device, respectively. Using this control system 6, not only can relevant parameters for the riveting operation be set (e.g., target pressure), but also limiting parameters (e.g., upper and lower pressure limits, upper and lower displacement limits) can be set. The control system 6 determines and controls the riveting process based on the set parameters and the actual parameters during the riveting operation. Furthermore, the control system 6 can generate a pressure curve during the riveting process using the parameters recorded and save it as an image. The pressure curve includes a transverse displacement axis, a longitudinal pressure axis, and a set pressure and displacement range frame for later review and analysis.

[0045] In addition, the riveting equipment also includes an alarm device connected to the control system 6. The alarm device is controlled by the control system 6 and can sound an alarm when riveting is abnormal. For example, an alarm is triggered when the detected displacement exceeds the set upper and lower displacement limits.

[0046] When using the above-mentioned riveting equipment for riveting operations, the operator places the product to be riveted into the riveting carrier / riveting fixture to form an assembly, and then places the assembly into the loading and unloading mechanism 2. The equipment will then automatically move the assembly to the riveting station, pass through the riveting mechanism, and then automatically exit to the material pick-up port of the loading and unloading mechanism 2. The entire riveting operation is monitored (pressure and displacement monitoring).

[0047] The aforementioned riveting equipment can detect pressure and displacement during the riveting process to determine whether the requirements are met, thereby improving the riveting quality.

[0048] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A riveting device, characterized in that: The riveting equipment includes: A riveting mechanism is used to press rivets onto a product to be riveted to form a riveted product; the riveting mechanism includes a lower riveting die, an upper riveting die, and a servo electric cylinder for driving the upper riveting die to move, wherein the servo electric cylinder has a built-in pressure sensor for collecting the riveting pressure during the riveting process and outputting a corresponding pressure detection signal; A loading and unloading mechanism for allowing operators to place the products to be riveted and to remove the products after riveting; A material transfer mechanism for moving the product to be riveted from the loading and unloading mechanism to the riveting mechanism, and for moving the riveted product from the riveting mechanism to the loading and unloading mechanism; A rivet bin for storing the rivets, the rivet bin having a discharge port for discharging the rivets; A rivet feeding mechanism for retrieving the rivet from the rivet magazine and transferring the rivet to the riveting mechanism; A control system for controlling the riveting mechanism, the loading and unloading mechanism, the material transfer mechanism, and the nail feeding mechanism.

2. The riveting equipment according to claim 1, characterized in that: The riveting mechanism also includes a displacement sensor for detecting the displacement of the product before and after riveting.

3. The riveting equipment according to claim 1, characterized in that: The loading and unloading mechanism includes multiple loading and unloading platforms that can move alternately.

4. The riveting equipment according to claim 1, characterized in that: The material transfer mechanism includes an XYZ axis moving platform capable of three-axis motion.

5. The riveting equipment according to claim 4, characterized in that: The XYZ axis moving platform includes an X-axis guide rail, an X-axis slider movably mounted on the X-axis guide rail, an X-axis drive device for driving the X-axis slider to move along the X-axis guide rail, a Y-axis guide rail mounted on the X-axis slider, a Y-axis slider movably mounted on the Y-axis guide rail, a Y-axis drive device for driving the Y-axis slider to move along the Y-axis guide rail, a Z-axis guide rail mounted on the Y-axis slider, a material transfer platform movably mounted on the Z-axis guide rail, and a Z-axis drive device for driving the material transfer platform to move along the Z-axis guide rail.

6. The riveting equipment according to claim 1, characterized in that: The discharge port is equipped with a length detection device for detecting the length of the rivet.

7. The riveting equipment according to claim 1, characterized in that: The rivet chamber is equipped with a vibratory feeder that transports the rivets to the discharge port.

8. The riveting equipment according to claim 1, characterized in that: The rivet feeding mechanism includes a rivet clamp for gripping the rivet and a clamping device for moving the rivet clamp.

9. The riveting equipment according to claim 1, characterized in that: The riveting equipment also includes an alarm device connected to the control system and which alarms when riveting is abnormal.

10. The riveting equipment according to claim 1, characterized in that: The riveting equipment also includes a machine base, and the riveting mechanism, the loading and unloading mechanism, the material transfer mechanism, the nail feeding mechanism, and the control system are all mounted on the machine base.

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