Pneumatic pressing tool

Abstract

The utility model discloses a pneumatic pressing tool, which relates to the technical field of processing tools and comprises a bottom plate, a processing table, a lower pressing module, an upper pressing module, an air cylinder and a clamping component, four supporting legs are arranged at the bottom of the bottom plate in a rectangular shape, and the processing table is vertically welded on the bottom plate. Two guide rails are symmetrically arranged on the upper surface of the bottom plate, a guide groove is formed between the two guide rails, and the lower pressing module is slidably arranged in the guide groove in a sleeved mode. According to the utility model, a pneumatic system is adopted to realize quick pressing, the efficiency is obviously improved, the model changing time is shortened due to the modular design, and the flexibility and adaptability of a production line are greatly improved; a three-axis three-stage telescopic air cylinder and a built-in magnetostriction displacement sensor are adopted, position data of a piston are fed back in real time, the pressing precision is ensured, an auxiliary clamping effect is provided in the pressing process through wedge-shaped cooperation of a clamping assembly and a moving mechanism, the pressing stability and accuracy are further improved, and the assembly error caused by workpiece shaking is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of processing tooling technology, specifically relating to a pneumatic pressing tooling. Background Technology

[0002] In modern industrial production, especially in the manufacturing of new energy vehicle parts, press-fit assembly is a common processing technology. Traditional press-fit processes typically use hydraulic equipment or manual operation, which has the following problems: Traditional hydraulic equipment has a long press-fit cycle, usually requiring 4 to 6 seconds to complete a single part press-fit, and the changeover time is also long, affecting production efficiency; insufficient precision: the press-fit precision of hydraulic equipment is low, making it difficult to meet the requirements of high-precision assembly, which can easily lead to unstable product quality, such as large dispersion in contact resistance; and hydraulic equipment consumes a lot of energy, resulting in high operating costs, which is not conducive to energy conservation and environmental protection. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a pneumatic pressing tool. By optimizing the structural design and adopting an advanced pneumatic system, it significantly improves pressing efficiency, accuracy, and compatibility, while reducing energy consumption.

[0004] The solution adopted by this utility model to solve its technical problem is: a pneumatic pressing tooling, including a base plate and a processing table. The bottom of the base plate is rectangular with four support legs. The processing table is vertically welded onto the base plate. It also includes a lower pressing module, an upper pressing module, a cylinder, and a clamping assembly. Two guide rails are symmetrically arranged on the upper surface of the base plate, forming a guide groove between them. The lower pressing module is slidably fitted into the guide groove. A pull handle is provided on the front side of the lower pressing module. A positioning element is provided on the rear wall of the processing table. The upper pressing module is positioned by the lower pressing module. A cylinder is installed inside the processing table, and the upper pressing module is installed inside the processing table by the cylinder. The clamping assembly includes two clamping blocks symmetrically arranged on both sides of the lower pressing module. The two clamping blocks are installed inside the processing table by telescopic reset components. The side of the clamping block facing away from the lower pressing module is set with a trapezoidal cross section. Push rods are symmetrically arranged on the left and right sides of the upper pressing module. The bottom end of the push rod is a beveled structure that matches the trapezoidal cross section of the clamping block. A wedge-shaped engagement and moving mechanism is formed between the clamping block and the push rod.

[0005] Furthermore, the cylinder is a three-axis, three-stage telescopic cylinder, with the top of the cylinder mounted on the top of the processing table and the lower output shaft fixed to the upper surface of the upper pressing module.

[0006] Furthermore, the positioning element includes a bolt top post that is installed through the rear wall of the machining table, and the bolt top post is positioned inside the machining table by a nut.

[0007] Furthermore, a flange is provided at the front of the base plate, the flange is located at the center of the guide groove and protrudes above the guide groove.

[0008] Furthermore, four guide pillars are fixed longitudinally inside the processing table. The four guide pillars are arranged in a rectangular shape at the four corners of the lower pressing module. Guide holes are opened through the four corners of the lower pressing module. The lower pressing module is vertically slidably fitted onto the guide pillars through the guide holes.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This invention utilizes a pneumatic system for rapid pressing, significantly improving efficiency compared to traditional hydraulic equipment. Its modular design reduces changeover time, greatly enhancing the flexibility and adaptability of the production line. A three-axis, three-stage telescopic cylinder with a built-in magnetostrictive displacement sensor provides real-time feedback of piston position data, ensuring pressing accuracy. The wedge-shaped moving mechanism of the clamping components provides auxiliary clamping during the pressing process, further improving stability and precision, and reducing assembly errors caused by workpiece movement. The modular design allows for quick replacement of the lower pressing module to meet the assembly needs of different workpieces. The equipment has a simple structure and is easy to operate. Rapid positioning and pressing are achieved through a pull handle and positioning components, reducing manual intervention and improving operational efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is one of the partial cross-sectional structural schematic diagrams of this utility model;

[0013] Figure 3 This is a frontal sectional view of the present invention.

[0014] Figure 4 This is the second partial cross-sectional structural schematic diagram of the present invention;

[0015] Figure 5 for Figure 3 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. Processing table; 2. Base plate; 3. Guide rail; 4. Lower pressing module; 5. Pull handle; 6. Flange; 7. Pressing workpiece; 8. Upper pressing module; 9. Cylinder; 10. Pressing column; 11. Guide column; 12. Clamping block; 13. Telescopic reset component; 14. Push rod; 15. Bolt top column; 16. Support leg. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Please see Figure 1-5 This utility model provides a technical solution for a pneumatic pressing tool: Example

[0019] according to Figure 1 and Figure 2 As shown, a pneumatic pressing fixture mainly includes a base plate 2, a processing table 1, a lower pressing module 4, an upper pressing module 8, and a cylinder 9. The bottom of the base plate 2 is rectangular and has four support legs 16. The processing table 1 is vertically welded onto the base plate 2. Two guide rails 3 are symmetrically arranged on the upper surface of the base plate 2, forming a guide groove between the two guide rails 3. The lower pressing module 4 is slidably fitted into the guide groove. A pull handle 5 is provided on the front side of the lower pressing module 4, which can pull the lower pressing module 4 to move back and forth in the guide groove. The upper pressing module 8 is provided above the lower pressing module 4 and is installed in the processing table 1 by the cylinder 9. A positioning component is also provided on the rear wall of the processing table 1 to position the movement of the lower pressing module 4, so that the lower pressing module 4 and the upper pressing module 8 are completely aligned vertically.

[0020] The cylinder 9 here is a three-axis, three-stage telescopic cylinder 9 with an adjustable stroke of 50 / 100 / 150mm. The top of the cylinder 9 is mounted on the top of the processing table 1, and the lower output shaft is fixed to the upper surface of the upper pressing module 8. The three-stage telescopic cylinder has a built-in magnetostrictive displacement sensor with a resolution of 0.01mm, which provides real-time feedback of piston position data. The multi-stage cylinder coordinated control accuracy is ≤±0.015mm, the axial positioning error is ≤1.8% within the 5-25kN range, the dynamic response characteristic is that the response time for the step pressure to reach 90% of the set value is ≤80ms, and the cycle life is 500,000 pressing actions under rated load with a decay of <3%.

[0021] The lower pressing module 4 has a placement slot for placing the pressing workpiece 7 to be processed. The placement slot of the lower pressing module 4 is fitted to the size of the pressing workpiece 7, and the pressing workpiece 7 can be positioned on the lower pressing module 4. The upper pressing module 8 has pressing pillars 10 below it. The number and position of the pressing pillars 10 correspond to the pressing position on the pressing workpiece 7 to be processed. Taking a high-voltage connector part of a new energy vehicle as an example, the insulator of the high-voltage connector is placed on the lower pressing module 4. The pressing pillars 10 on the upper pressing module 8 are used to press the terminal pins of the high-voltage connector. The number and position of the pressing pillars 10 correspond to the installation position of the terminal pins. When pressing and assembling the insulator and the terminal pins, the upper pressing module 8 is moved downward by the cylinder 9, and the terminal pins can be pressed into the insulator by the pressing pillars 10.

[0022] like Figure 4As shown, the positioning component includes a bolt top post 15 that is installed through the rear wall of the processing table 1. A nut for limiting and positioning is threaded onto the bolt top post 15. When the lower pressing module 4 moves to the rear and abuts against the front end of the bolt top post, it means that the lower pressing module 4 has moved into position and corresponds vertically with the upper pressing module 8. The bolt top post 15 serves to limit and position the lower pressing module 4, thereby facilitating the determination of the front and rear positions of the lower pressing module 4 and the positioning of the upper and lower pressing modules 4. The extension length of the bolt top post 15 can be adjusted to accommodate different lower pressing modules 4.

[0023] A flange 6 is provided at the front of the base plate 2. The flange 6 is located at the center of the guide groove and protrudes a part of the guide groove. The flange 6 limits the forward movement of the lower pressing module 4 to prevent the lower pressing module 4 from coming out of the guide groove. The flange 6 is detachably installed at the front of the base plate 2. After the flange 6 is removed, the lower pressing module 4 can be removed from the base plate 2 to replace different module molds.

[0024] To further improve the stability of the cylinder 9 controlling the up and down movement of the upper pressing module 8, four guide pillars 11 are fixed longitudinally inside the processing table 1. The four guide pillars 11 are arranged in a rectangular shape at the four corners of the lower pressing module 4. Guide holes are opened through the four corners of the lower pressing module 4, and the lower pressing module 4 is vertically slidably mounted on the guide pillars 11 through the guide holes.

[0025] In practical use, the pneumatic pressing fixture of this utility model first pulls out the lower pressing module 4 through the pull handle 5, places the workpiece 7 to be assembled in the placement groove of the lower pressing module 4, and shallowly inserts the terminal pin to be assembled into the assembly position. Then, the lower pressing module 4 is pushed into the processing table 1 by the pull handle 5. After the lower pressing module 4 abuts against the screw top post, the upper pressing module 8 corresponds to the upper and lower positions of the lower pressing module 4. Then, the cylinder 9 is activated to control the upper pressing module 8 to move downward. The terminal pin that is shallowly inserted on the insulator is completely pressed and assembled into the insulator by the pressing column 10, thus completing the pneumatic pressing assembly of the workpiece.

[0026] This technical solution represents a significant improvement over existing technologies: the single-piece pressing cycle is shortened to 1.2 seconds, compared to 4-6 seconds for traditional processes; changeover time is reduced to 15 seconds, resulting in a significant increase in assembly efficiency; the CPK value is increased from 1.12 to 1.67, and the contact resistance dispersion is controlled within ±5%, improving quality consistency; it is compatible with connectors ranging from 3 to 120 mm in size, covering the needs of over 95% of new energy vehicle models, enhancing equipment adaptability; the pneumatic system reduces energy consumption by 62% compared to hydraulic equipment, saving approximately 36,000 RMB per unit in electricity costs annually, demonstrating significant energy-saving effects. Example

[0027] Based on Embodiment 1, since the upper and lower pressing modules 4 generate forces between the insulator and the terminal pins when pressing the workpiece 7, in order to further improve the stability and accuracy of pressing, a clamping assembly is also provided in the processing table 1.

[0028] like Figure 3 and Figure 5 As shown, the clamping assembly includes two clamping blocks 12 symmetrically arranged on the left and right sides of the processing table 1. The two clamping blocks 12 are installed in the processing table 1 via telescopic reset members 13. After the lower pressing module 4 moves below the upper pressing module 8, the two clamping blocks 12 are exactly on both sides of the lower pressing module 4. The side of the clamping block 12 facing away from the lower pressing module 4 is set with a trapezoidal cross section. Longitudinal push rods 14 are symmetrically arranged on the left and right sides of the upper pressing module 8. The bottom end of the push rod 14 is set with an inclined structure that matches the trapezoidal cross section of the clamping block 12. That is, the clamping block 12 and the push rod 14 are... A wedge-shaped moving mechanism is formed between the upper pressing module 8 and the lower pressing module 4. When the upper pressing module 8 moves downward under the control of the cylinder 9, the push rod 14 moves downward synchronously and contacts the clamping block 12. Through the inclined surface cooperation between the push rod 14 and the clamping block 12, the push rod 14 can push the clamping block 12 to move inward during the downward movement. The clamping blocks 12 on both sides hold the pressing workpiece 7, providing an auxiliary clamping effect for the pressing workpiece 7, further improving the stability and accuracy of the pressing assembly. At the same time, the upper pressing module 8 can continue to move downward and cooperate with the lower pressing module 4 to complete the pressing operation.

[0029] The telescopic reset component 13 is a part with telescopic guidance and automatic reset functions. Taking the telescopic rod as an example, the telescopic rod is set horizontally, and its two ends are fixed to the side wall of the processing table 1 and the side wall of the clamping block 12, respectively. A spring is installed inside the telescopic rod, and the telescopic rod and the spring work together to perform the telescopic reset function. When the pressing assembly is completed, after the upper pressing module 8 moves upward, the push rod 14 gradually moves away from the clamping block 12. Then, under the reset function of the telescopic reset component 13, it drives the clamping block 12 to move outward and reset, automatically releasing the clamping effect on the pressed workpiece 7.

[0030] Through the cooperation between the above structures, the clamping components can work in conjunction with the pressing fixture, ensuring accurate pressing and assembly of the workpiece while improving the ease of operation of the device.

[0031] The above description is only a preferred embodiment of the present utility model and does not limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic pressing fixture, comprising a base plate (2) and a processing table (1), wherein the bottom of the base plate (2) is rectangularly provided with four support legs (16), and the processing table (1) is vertically welded onto the base plate (2), characterized in that: It also includes a lower pressing module (4), an upper pressing module (8), a cylinder (9), and a clamping assembly. Two guide rails (3) are symmetrically arranged on the upper surface of the base plate (2), forming a guide groove between the two guide rails (3). The lower pressing module (4) is slidably fitted into the guide groove. A pull handle (5) is provided on the front side of the lower pressing module (4). A positioning element is provided on the rear wall of the processing table (1) to position the lower pressing module (4). A cylinder (9) is installed inside the processing table (1), and the upper pressing module (8) is mounted on the processing table (1) via the cylinder (9). 1) Inside; The clamping assembly includes two clamping blocks (12) symmetrically arranged on both sides of the lower pressing module (4). The two clamping blocks (12) are installed in the processing table (1) through the telescopic reset member (13). The side of the clamping block (12) facing away from the lower pressing module (4) is set with a trapezoidal cross section. Push rods (14) are symmetrically arranged on the left and right sides of the upper pressing module (8). The bottom end of the push rod (14) is a slope structure that matches the trapezoidal cross section of the clamping block (12). A wedge-shaped mating moving mechanism is formed between the clamping block (12) and the push rod (14).

2. The pneumatic pressing tooling according to claim 1, characterized in that: The cylinder (9) is a three-axis three-stage telescopic cylinder (9). The top of the cylinder (9) is installed on the top of the processing table (1), and the lower output shaft is fixed on the upper surface of the upper pressing module (8).

3. The pneumatic pressing tooling according to claim 1, characterized in that: The positioning element includes a bolt top post (15) that is installed through the rear wall of the processing table (1). The bolt top post (15) is positioned inside the processing table (1) by a nut.

4. The pneumatic pressing tooling according to claim 1, characterized in that: A flange (6) is provided in front of the base plate (2). The flange (6) is located at the center of the guide groove and protrudes above the guide groove.

5. A pneumatic pressing fixture according to claim 1, characterized in that: Four guide pillars (11) are fixed longitudinally inside the processing table (1). The four guide pillars (11) are arranged in a rectangular shape at the four corners of the lower pressing module (4). Guide holes are opened through the four corners of the lower pressing module (4). The lower pressing module (4) is vertically slidably mounted on the guide pillars (11) through the guide holes.

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