Tool for riveting

Abstract

The utility model discloses a tool presss from both sides device, including base, the top of base is provided with the down mechanism, positioning frock subassembly and control unit, the down mechanism includes the support, the bottom fixed connection in the top surface of base of support, the top fixed connection of support one end has double -out -bar hydraulic cylinder, the utility model discloses has improved the press riveting quality: through double -out -bar hydraulic cylinder provides stable and the pressure of accurate control, and the accurate positioning of positioning frock to spare part, effectively avoided the strength and position deviation problem that appears in the press riveting process, and product yield can improve to 95% or above, improve production efficiency: the automatic down operation has replaced manual operation, and the press riveting time of single spare part can shorten to the one third of original, can satisfy the demand of large -scale production, reduce manual requirement: the operating panel of control unit is simple and easy to understand, and the operator can operate after simple training, reduced the degree of dependence on operator skill.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a tooling riveting device. Background Technology

[0002] In the assembly process of many industrial fields such as machinery manufacturing, electronics, and automotive parts, press riveting is widely used as a reliable non-removable connection method to firmly press standard parts such as rivets, nuts, and studs onto thin plates or specific components.

[0003] Currently, the mainstream riveting operation methods in the industry mainly include the following: I. Traditional manual riveting: The operator holds the workpiece or uses a simple clamp for positioning, and then operates a regular riveting machine for crimping. This method has significant drawbacks: 1. Poor quality stability: The quality of riveting relies excessively on the operator's experience and feel; due to the lack of precise control over the pressing stroke and pressure, it is easy to have problems such as insufficient connection strength due to excessively loose riveting, or workpiece deformation and rivet damage due to excessively tight riveting, making it difficult to guarantee a stable product yield; 2. Low production efficiency: Manual loading, unloading, alignment, and operation cycles are long and labor-intensive, which cannot meet the needs of modern large-scale, rhythmic production; 3. Safety risks: Manual operation poses certain safety hazards and requires high standards of production safety management; II. Dedicated semi-automatic riveting equipment: To solve the problem of... To address the issue of labor efficiency, some semi-automatic equipment has emerged in the market. While these machines reduce labor intensity to some extent, their tooling fixtures are typically designed specifically for a single product specification. When the production line needs to change product models, the machine must be stopped and the entire set of tooling fixtures replaced. This process is not only time-consuming and labor-intensive, leading to production interruptions, but also significantly increases the costs of tooling manufacturing, management, and inventory, severely limiting the flexibility of the production line and making it unable to adapt to the modern manufacturing trend of "multiple varieties and small batches." Existing automated riveting machines also have limitations: while some high-end equipment employs automated control, shortcomings remain in key areas. In particular, their positioning tooling lacks versatility and flexible adjustability. Furthermore, their pressure control systems may be relatively crude, unable to achieve precise closed-loop control, making it difficult to cope with application scenarios that demand stringent riveting quality.

[0004] In summary, existing riveting solutions struggle to achieve an effective balance between quality consistency, production efficiency, equipment versatility, and labor costs. Therefore, there is an urgent need in this field for a novel tooling riveting technology that simultaneously possesses high precision, high efficiency, and high flexibility to overcome the aforementioned long-standing technical bottlenecks. Utility Model Content

[0005] The purpose of this utility model is to provide a tooling riveting device to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A tooling riveting device includes a base, and a pressing mechanism, a positioning tooling assembly, and a control unit are disposed above the base.

[0007] The pressing mechanism includes a bracket, the bottom of which is fixedly connected to the top surface of the base. A double-rod hydraulic cylinder is fixedly connected to one end of the top of the bracket. A pressure sensor is fixedly connected to the bottom of the piston rod of the double-rod hydraulic cylinder. A pressure rod is fixedly connected to the bottom of the pressure sensor. A pressure head is fixedly connected to the bottom of the pressure rod.

[0008] A further improvement of the present invention is that the positioning fixture assembly includes a fixed base, the bottom of which is fixed to the top surface of the base by bolts.

[0009] A further improvement of this utility model is that: a dovetail groove is provided on the top surface of the fixed base, and an adjustable positioning block is slidably connected inside the dovetail groove, and the bottom of the adjustable positioning block is locked to the fixed base by bolts.

[0010] A further improvement of the present invention is that the control unit includes a control box, a three-position four-way proportional directional valve and a displacement sensor, and the bottom surface of the control box is fixedly connected to the top surface of the base.

[0011] A further improvement of this utility model is that the bottom of the three-position four-way proportional directional valve is fixedly connected to the top surface of the control box, and the displacement sensor is set on the top of the piston rod of the double-rod hydraulic cylinder.

[0012] A further improvement of this utility model is that: the control box is equipped with a programmable logic controller, the programmable logic controller is electrically connected to a three-position four-way proportional directional valve, and the three-position four-way proportional directional valve is connected to the two working chambers of the double-rod hydraulic cylinder through hydraulic pipelines.

[0013] A further improvement of this utility model is that an operation panel is provided on one side of the control box, the operation panel is electrically connected to the programmable logic controller, and the operation panel is used to set the riveting parameters and display the device status.

[0014] A further improvement of this utility model is that both the displacement sensor and the pressure sensor are connected to the programmable logic controller (PLC) via signal connection.

[0015] By adopting the above technical solutions, the quality and production efficiency of riveting have been improved, and the ability to adapt to various specifications and reduce labor requirements has been achieved.

[0016] Compared with the prior art, the beneficial effects of this utility model are: this tooling riveting device, Improved riveting quality: Stable and precisely controllable pressure is provided by the dual-rod hydraulic cylinder, and the precise positioning of parts by the positioning fixture effectively avoids force and position deviations during the riveting process, greatly improving the riveting quality and increasing the product yield to over 95%. Increased production efficiency: Automated pressing operation replaces manual operation, significantly increasing the riveting speed. The riveting time for a single part can be reduced to one-third of the original, meeting the needs of large-scale production. Reduced labor requirements: The control unit's operation panel is simple and easy to understand, and operators can operate it after simple training, reducing the dependence on operator skills. Adaptable to multiple specifications: The adjustable positioning blocks of the positioning fixture component can be adjusted according to the size of different parts. One set of fixtures can meet the riveting needs of multiple parts, reducing fixture replacement costs and improving fixture versatility. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is a schematic diagram of the pressing mechanism of this utility model; Figure 4 This is a schematic diagram of the positioning tooling component structure of this utility model; Figure 5 This is a schematic diagram of the control unit structure of this utility model.

[0018] In the diagram: 1. Base; 2. Pressing mechanism; 3. Bracket; 4. Double-rod hydraulic cylinder; 5. Press rod; 6. Press head; 7. Positioning fixture assembly; 8. Fixed seat; 9. Adjustable positioning block; 10. Control unit; 11. Control box; 12. Three-position four-way proportional directional valve; 13. Displacement sensor; 14. Pressure sensor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1 Please see Figure 1-5This utility model provides a technical solution: a tooling riveting device, including a base 1, a pressing mechanism 2, a positioning tooling assembly 7 and a control unit 10 are arranged above the base 1, the pressing mechanism 2 includes a bracket 3, the bottom of the bracket 3 is fixedly connected to the top surface of the base 1, a double-rod hydraulic cylinder 4 is fixedly connected to one end of the top of the bracket 3, a pressure sensor 14 is fixedly connected to the bottom end of the piston rod of the double-rod hydraulic cylinder 4, a pressure rod 5 is fixedly connected to the bottom of the pressure sensor 14, and a pressure head 6 is fixedly connected to the bottom of the pressure rod 5.

[0021] In this embodiment, the base 1 provides a stable foundation for the entire device. The hydraulic system of this invention is powered by an external hydraulic pump station, which is connected to the P and T ports of the three-position four-way proportional directional valve 12 through pipelines to form a complete hydraulic circuit. After the equipment is started, the double-outlet hydraulic cylinder 4 is driven to extend its piston rod under the command of the control unit 10. The force is transmitted to the pressure head 6 through the pressure sensor 14 and the pressure rod 5, causing it to move downward to perform the riveting operation. During this process, the pressure sensor 14 monitors the riveting force in real time and feeds it back to the control unit 10. After the riveting is completed, the piston rod of the double-outlet hydraulic cylinder 4 retracts, driving the pressure head 6 to reset. This pressing mechanism 2 constitutes an automated pressure execution system, replacing the traditional manual operation and ensuring the stability and consistency of the riveting action from the source.

[0022] Example 2 Please see Figure 1-5 Based on Embodiment 1, this utility model provides a technical solution: Preferably, the positioning tooling assembly 7 includes a fixed seat 8, the bottom of which is fixed to the top surface of the base 1 by bolts; a dovetail groove is provided on the top surface of the fixed seat 8, and an adjustable positioning block 9 is slidably connected inside the dovetail groove, the bottom of which is locked to the fixed seat 8 by bolts.

[0023] In this embodiment, based on the contour and hole positions of the parts to be riveted, the positions of two or more adjustable positioning blocks 9 on the dovetail groove guide rail of the fixed base 8 are pre-adjusted so that they can precisely limit and support the parts, and then they are locked and fixed with bolts. When it is necessary to rivet parts of different specifications, it is only necessary to loosen the bolts, readjust the position of the adjustable positioning blocks 9 and lock them again, without having to replace the entire tooling. This design greatly improves the versatility of the equipment, shortens the production changeover time and reduces tooling costs.

[0024] Example 3 Please see Figure 1-5Based on Embodiment 1, this utility model provides a technical solution: Preferably, the control unit 10 includes a control box 11, a three-position four-way proportional directional valve 12, and a displacement sensor 13. The bottom surface of the control box 11 is fixedly connected to the top surface of the base 1, the bottom of the three-position four-way proportional directional valve 12 is fixedly connected to the top surface of the control box 11, the displacement sensor 13 is disposed on the top of the piston rod of the double-rod hydraulic cylinder 4, a programmable logic controller is disposed inside the control box 11, the programmable logic controller is electrically connected to the three-position four-way proportional directional valve 12, the three-position four-way proportional directional valve 12 is connected to the two working chambers of the double-rod hydraulic cylinder 4 through hydraulic pipelines, an operation panel is disposed on one side of the control box 11, the operation panel is electrically connected to the programmable logic controller, the operation panel is used to set riveting parameters and display the device status, and the displacement sensor 13 and the pressure sensor 14 are both signal connected to the programmable logic controller.

[0025] In this embodiment, the operator presets riveting parameters (such as target pressure, downward stroke, and movement speed) through the operation panel. After startup, the programmable logic controller (PLC) sends an analog signal to the three-position four-way proportional directional valve 12 to precisely control the flow and direction of the hydraulic oil, thereby driving the double-rod hydraulic cylinder 4 to move at the set speed. During this process, the displacement sensor 13 detects the precise position of the piston rod (i.e., the stroke of the pressure head 6) in real time, and the pressure sensor 14 detects the riveting force in real time. The PLC continuously compares these feedback values ​​with the preset parameters and dynamically adjusts the signal output to the three-position four-way proportional directional valve 12 to ensure that the riveting process is always carried out within the preset process window. This dual closed-loop control of pressure and displacement is the fundamental guarantee for this device to achieve high-precision and high-quality riveting.

[0026] The working principle of this tooling riveting device will be explained in detail below.

[0027] Please see Figure 1-5The hydraulic system of this invention is powered by an external hydraulic pump station, which is connected to the P and T ports of the three-position four-way proportional directional valve 12 via pipelines, forming a complete hydraulic circuit. Installation and commissioning of the equipment: First, place the base 1 stably on the workbench and perform leveling to provide a solid reference for the entire device; then, install and fix the double-rod hydraulic cylinder 4 on the bracket 3, and connect all hydraulic pipelines to ensure reliable communication between the three-position four-way proportional directional valve 12 and the two working chambers of the double-rod hydraulic cylinder 4; next, connect the pressure rod 5 to the lower end of the piston rod of the double-rod hydraulic cylinder 4, and install the pressure head 6; finally, fix the fixing seat 8 of the positioning fixture assembly 7 to the designated position on the base 1 with bolts. Based on the dimensions of the first batch of parts to be riveted, slide the adjustable positioning block 9 in the dovetail groove of the fixed seat 8 and lock it with bolts; finally, connect all circuits of the control unit 10, including the signal lines and power lines between the programmable logic controller and the three-position four-way proportional directional valve 12, displacement sensor 13 and pressure sensor 14; after powering on, set the initial riveting parameters on the operation panel, such as the lower pressure value, target stroke, movement speed, etc., and perform no-load operation debugging to check whether the action of the double-rod hydraulic cylinder 4, sensor feedback and alarm functions are normal; riveting operation of parts: place the parts to be riveted on the positioning fixture assembly 7, so that its reference surface is in contact with the positioning surface of the adjustable positioning block 9. This process achieves precise positioning and clamping. After confirming correct positioning, the operator presses the start button on the control panel. Upon receiving the instruction, the control unit 10 sends a control signal to the three-position four-way proportional directional valve 12 according to a preset program. This drives the piston rod of the double-rod hydraulic cylinder 4 to extend, sequentially moving the pressure head 6 downwards via the pressure sensor 14 and the pressure rod 5, thus riveting the parts. During this process, the pressure sensor 14 monitors the riveting force in real time, and the displacement sensor 13 monitors the extension position of the piston rod in real time, feeding the data back to the programmable logic controller in real time. This forms a high-precision closed-loop control system, ensuring that the actual riveting process matches the preset parameters, thereby guaranteeing the riveting quality. After riveting is completed... The piston rod of the double-rod hydraulic cylinder 4 automatically retracts, driving the pressure head 6 to rise and reset, allowing the operator to remove the processed parts. For riveting parts of different specifications: when changing product models, this device demonstrates its high flexibility. The operator only needs to loosen the bolts of the adjustable positioning block 9, slide one or more adjustable positioning blocks 9 along the dovetail groove of the fixed seat 8 to the new position according to the size and positioning hole position of the new part, and then re-tighten them to complete the tooling change. Subsequently, the riveting parameter group matching the new part can be called up or re-entered on the operation panel. The entire process does not require the replacement of any large components, allowing for rapid deployment of new parts riveting operations, greatly improving equipment utilization and production flexibility.

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A tooling riveting device, comprising a base (1), characterized in that, A pressing mechanism (2), a positioning tooling assembly (7), and a control unit (10) are provided above the base (1). The pressing mechanism (2) includes a bracket (3), the bottom of which is fixedly connected to the top surface of the base (1). A double-rod hydraulic cylinder (4) is fixedly connected to one end of the top of the bracket (3). A pressure sensor (14) is fixedly connected to the bottom of the piston rod of the double-rod hydraulic cylinder (4). A pressure rod (5) is fixedly connected to the bottom of the pressure sensor (14). A pressure head (6) is fixedly connected to the bottom of the pressure rod (5).

2. The tooling riveting device according to claim 1, characterized in that: The positioning fixture assembly (7) includes a fixed seat (8), the bottom of which is fixed to the top surface of the base (1) by bolts.

3. The tooling riveting device according to claim 2, characterized in that: The top surface of the fixed base (8) is provided with a dovetail groove, and an adjustable positioning block (9) is slidably connected inside the dovetail groove. The bottom of the adjustable positioning block (9) is locked to the fixed base (8) by bolts.

4. The tooling riveting device according to claim 1, characterized in that: The control unit (10) includes a control box (11), a three-position four-way proportional directional valve (12) and a displacement sensor (13), with the bottom surface of the control box (11) fixedly connected to the top surface of the base (1).

5. The tooling riveting device according to claim 4, characterized in that: The bottom of the three-position four-way proportional directional valve (12) is fixedly connected to the top surface of the control box (11), and the displacement sensor (13) is set on the top of the piston rod of the double-rod hydraulic cylinder (4).

6. The tooling riveting device according to claim 4, characterized in that: The control box (11) is equipped with a programmable logic controller. The programmable logic controller is electrically connected to a three-position four-way proportional directional valve (12). The three-position four-way proportional directional valve (12) is connected to the two working chambers of the double-rod hydraulic cylinder (4) through hydraulic pipelines.

7. A tooling riveting device according to claim 6, characterized in that: An operation panel is provided on one side of the control box (11). The operation panel is electrically connected to the programmable logic controller. The operation panel is used to set the riveting parameters and display the device status.

8. The tooling riveting device according to claim 7, characterized in that: Both the displacement sensor (13) and the pressure sensor (14) are connected to the programmable logic controller (PLC) via signal connection.

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