Airtightness detection device for preventing machining deformation

Abstract

The utility model relates to the technical field of air tightness detection, and provides an air tightness detection device for preventing machining deformation, which comprises a base, an operation table is fixed at the top end of the base, a workpiece body is arranged at the top end of the operation table, and positioning structures are uniformly arranged at the top of the operation table on the outer side of the workpiece body. By arranging the positioning structure, the workpiece body can be quickly centered and positioned under the contact action of the rubber protection pad on the inner wall of the limiting plate and the workpiece body, manual adjustment errors are avoided, and the rubber protection pad on the inner side of the limiting plate can buffer clamping force and prevent the surface of the workpiece from being scratched or deformed, so that the workpiece body is prevented from being damaged. And the moving block moves in the limiting groove, so that the positioning position of the limiting plate can be adjusted to adapt to workpiece bodies of different sizes, the device has the function of conveniently and quickly centering and positioning the workpiece bodies, and the convenience and the working efficiency of the airtightness detection device for preventing machining deformation during use are improved.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to an airtightness testing device that prevents deformation during machining. Background Technology

[0002] In the field of mechanical manufacturing, complex workpieces such as thin-walled parts and precision structural parts are generally prone to deformation during processing. If the clamping is not in place, the workpiece may deform during processing, affecting the output quality of the workpiece. Traditional testing methods usually only conduct air tightness tests after the part has been processed. By the time the problem is discovered, it is too late, reducing the yield of the workpiece. Therefore, it is necessary to design an air tightness testing device to prevent machining deformation.

[0003] To address this, patent CN219319690U discloses an airtightness testing device. This device includes a main body forming a sealed cavity, a first opening, and a second opening. The first opening communicates with the sealed cavity, and the main body is used to fit against the test piece to seal the first opening. The second opening communicates with the sealed cavity and is used to allow gas to flow into or out of the sealed cavity. The airtightness testing device of this application, with its main body forming a sealed cavity, a first opening, and a second opening, can achieve airtightness testing. The device has a simple structure, which helps reduce manufacturing costs.

[0004] Although the aforementioned airtightness testing device has a simple structure and low manufacturing cost, it is inconvenient to quickly position the workpiece when clamping it, which affects the accuracy of workpiece clamping and airtightness testing. Therefore, it is necessary to design an airtightness testing device that prevents machining deformation. Utility Model Content

[0005] The purpose of this invention is to provide an airtightness testing device that prevents deformation during machining, thereby solving the problem that existing airtightness testing devices are inconvenient to quickly position the workpiece when clamping it, which affects the accuracy of workpiece clamping and airtightness testing.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an airtightness detection device for preventing machining deformation, including a base;

[0007] An operating table is fixed to the top of the base, and a workpiece body is provided on the top of the operating table.

[0008] The top of the operating table on the outer side of the workpiece body is uniformly provided with positioning structures. The positioning structure includes limiting grooves uniformly opened on the top of the operating table. Each limiting groove is provided with a moving block. Each moving block is threaded with a lead screw. The positioning structure also includes servo motors uniformly fixed on the outer wall of the operating table. Each moving block has a limiting plate fixed at its top.

[0009] An airtightness detection structure is fixed to one side of the top of the base, and an alarm light is fixed to one side of the airtightness detection structure at the top of the base.

[0010] Furthermore, a lower jet pipe is fixed in the middle of the base, a top plate is fixed at the top of the outer base of the operating table, and a pressure-holding assembly is fixed on the inner wall of the top of the top plate.

[0011] Furthermore, the limiting grooves are evenly distributed on the top of the operating table, and rubber protective pads are fixed on the side of the limiting plate near the workpiece body. Pressure sensors are installed inside the limiting plates, and the output terminals of the pressure sensors inside the limiting plates are electrically connected to the input terminals of the microcontroller and the servo motor.

[0012] Furthermore, one end of each lead screw extends to the outside of the operating table and is fixedly connected to the output end of the servo motor, while the other end of the lead screw extends to the inside of the operating table and is rotatably connected to the operating table.

[0013] Furthermore, the pressure holding assembly includes a hydraulic rod, a pressure plate, and an upper jet pipe. The hydraulic rod is fixed to the inner wall of the top of the top plate, the bottom end of the hydraulic rod is fixed to the pressure plate, and the upper jet pipe is fixed to one side inside the pressure plate.

[0014] Furthermore, a hose is fixedly connected to the top end of the upper jet pipe, and an air pump is externally connected to the hose at the top end of the upper jet pipe.

[0015] Furthermore, the airtightness detection structure includes a drive motor, a lifting seat, a lifting block, an electric telescopic rod, an extension plate, an infrared thermal imager, and a drive shaft. The lifting seat is fixed to one side of the top of the base, and the top of the lifting seat is fixedly installed with a drive motor. A drive shaft is provided on one side inside the lifting seat, and the lifting block is internally threaded to the drive shaft. An electric telescopic rod is fixed to the side of the lifting block near the workpiece body, and an extension plate is fixed to one end of the electric telescopic rod. An infrared thermal imager is fixed to the bottom end of the extension plate near the workpiece body.

[0016] Furthermore, the infrared thermal imager is equipped with a microcontroller, and the output of the infrared thermal imager is electrically connected to the input of the alarm light through the microcontroller.

[0017] Furthermore, the top end of the drive shaft extends to the top end of the lifting seat and is fixedly connected to the output end of the drive motor, while the bottom end of the drive shaft extends into the interior of the lifting seat and is rotatably connected to the lifting seat.

[0018] Furthermore, the top outlet plane of the lower jet pipe is coplanar with the upper surface of the operating table, and the bottom end of the lower jet pipe extends to the outside of the base and is connected to an external air pump.

[0019] The airtightness testing device for preventing machining deformation provided by this utility model has the following advantages:

[0020] With the positioning structure, the rubber protective pad on the inner wall of the limiting plate contacts the workpiece body, enabling rapid centering and positioning of the workpiece body. This avoids errors caused by manual adjustment. Furthermore, the rubber protective pad on the inner side of the limiting plate can buffer the clamping force, preventing scratches or deformation of the workpiece surface. The moving block moves within the limiting groove, allowing adjustment of the positioning position of the limiting plate to accommodate workpiece bodies of different sizes. This enables the device to quickly center and position the workpiece body, improving the convenience and efficiency of the airtightness testing device for preventing machining deformation.

[0021] By incorporating a pressure-holding assembly, the upper air jet pipe allows for easy detection of the airtightness between the pressure plate and the workpiece body. Under the lifting action of the hydraulic rod, the pressure plate can be easily driven to press and fix the workpiece body. This enables the device to have the functions of easily fixing the workpiece body and easily detecting the airtightness between the pressure plate and the workpiece body, thereby improving the working efficiency of the airtightness detection device for preventing machining deformation during use.

[0022] By incorporating an airtightness detection structure, the infrared thermal imager can locate gas leaks by monitoring temperature field changes in the workpiece's components. Simultaneously, it can indirectly verify clamping uniformity. The extension and retraction of the electric telescopic rod allows for easy control of the infrared imager's detection area as needed. When necessary, the electric telescopic rod brings the infrared imager closer to the workpiece. If the infrared imager detects a gas leak, its internal microcontroller will control an alarm light to flash. This enables the device to easily detect whether the workpiece is being clamped stably, improving the efficiency of this airtightness detection device for preventing machining deformation during use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0025] Figure 3 This is a three-dimensional structural schematic diagram of the main cross-section of this utility model;

[0026] Figure 4 This is a top-view cross-sectional three-dimensional structural diagram of the present invention.

[0027] Figure 5 This is a side view sectional structural diagram of the present invention.

[0028] The following are the annotations in the diagram: 1. Base; 2. Operating table; 3. Positioning structure; 31. Limiting groove; 32. Moving block; 33. Lead screw; 34. Servo motor; 35. Limiting plate; 4. Workpiece body; 5. Top plate; 6. Holding assembly; 61. Hydraulic rod; 62. Pressure plate; 63. Upper air jet pipe; 7. Air tightness detection structure; 71. Drive motor; 72. Lifting seat; 73. Lifting block; 74. Electric telescopic rod; 75. Extension plate; 76. Infrared thermal imager; 77. Drive shaft; 8. Alarm light; 9. Lower air jet pipe. Detailed Implementation

[0029] 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.

[0030] Please see Figures 1-5 The present invention provides an airtightness testing device for preventing deformation during machining, comprising a base 1.

[0031] Reference Figures 1-5 The top of the base 1 is fixed with an operating table 2, and the top of the operating table 2 is set with a workpiece body 4. Positioning structures 3 are evenly arranged on the top of the operating table 2 outside the workpiece body 4. The positioning structure 3 includes limiting grooves 31 evenly opened on the top of the operating table 2. Each limiting groove 31 is provided with a moving block 32. Each moving block 32 is threadedly connected with a lead screw 33. The positioning structure 3 also includes servo motors 34 evenly fixed on the outer wall of the operating table 2. Each moving block 32 is fixed with a limiting plate 35. The limiting grooves 31 are evenly distributed on the top of the operating table 2. Each limiting plate 35 is fixed with a rubber protective pad on the side near the workpiece body 4. Each limiting plate 35 is installed with a pressure sensor. The output end of the pressure sensor inside the limiting plate 35 is electrically connected to the input end of the servo motor 34 through a microcontroller. One end of each lead screw 33 extends to the outside of the operating table 2 and is fixedly connected to the output end of the servo motor 34. The other end of the lead screw 33 extends to the inside of the operating table 2 and is rotatably connected to the operating table 2.

[0032] With an external power supply, place the workpiece body 4 on the top of the operating table 2, start the servo motor 34, the servo motor 34 will drive the lead screw 33 to rotate, the lead screw 33 will drive the moving block 32 to move linearly along the limit groove 31, pushing the limit plate 35 to move closer to the workpiece body 4. After the rubber protective pad contacts the workpiece body 4, the pressure sensor will feed back the pressure signal to the servo motor 34, the servo motor 34 will stop running, and the four sets of limit plates 35 will move synchronously to position the workpiece body 4 at the center of the operating table 2.

[0033] Reference Figures 1-5 An airtightness detection structure 7 is fixed to one side of the top of the base 1. The airtightness detection structure 7 includes a drive motor 71, a lifting seat 72, a lifting block 73, an electric telescopic rod 74, an extension plate 75, an infrared thermal imager 76, and a drive shaft 77. The lifting seat 72 is fixed to one side of the top of the base 1. The drive motor 71 is fixedly installed at the top of the lifting seat 72. The drive shaft 77 is provided on one side inside the lifting seat 72. The lifting block 73 is threadedly connected to the inside of the drive shaft 77. An electric telescopic rod 74 is fixed to the side of the lifting block 73 near the workpiece body 4. An extension plate 75 is fixed to one end of the retractable rod 74. An infrared thermal imager 76 is fixed to the bottom end of the extension plate 75 near the workpiece body 4. A microcontroller is installed inside the infrared thermal imager 76. The output end of the infrared thermal imager 76 is electrically connected to the input end of the alarm light 8 through the microcontroller. The top end of the drive shaft 77 extends to the top end of the lifting seat 72 and is fixedly connected to the output end of the drive motor 71. The bottom end of the drive shaft 77 extends into the interior of the lifting seat 72 and is rotatably connected to the lifting seat 72. An alarm light 8 is fixed to one side of the airtightness detection structure 7 at the top of the base 1.

[0034] When an external power source is connected, the drive motor 71 is started. The drive motor 71 will drive the lifting block 73 to move up and down through the drive shaft 77. The electric telescopic rod 74 can adjust the horizontal position of the extension plate 75 so that the infrared thermal imager 76 is aligned with the detection area. If a gas leak occurs, the temperature around the workpiece body 4 will drop. The infrared thermal imager 76 can capture the temperature changes of the workpiece body 4's accessories. An external air pressure sensor can be connected around the workpiece body 4. If the air pressure sensor synchronously monitors the air pressure fluctuations and integrates them with the infrared data for analysis, an alarm light 8 will be triggered if a leak is detected.

[0035] Reference Figures 2-5 A lower jet pipe 9 is fixed in the middle of the base 1. A top plate 5 is fixed on the top of the base 1 outside the operating table 2. A pressure assembly 6 is fixed on the inner wall of the top of the top plate 5. The pressure assembly 6 includes a hydraulic rod 61, a pressure plate 62 and an upper jet pipe 63. The hydraulic rod 61 is fixed on the inner wall of the top of the top plate 5. The pressure plate 62 is fixed at the bottom of the hydraulic rod 61. The upper jet pipe 63 is fixed on one side inside the pressure plate 62. A hose is fixedly connected to the top of the upper jet pipe 63. An air pump is connected to the hose at the top of the upper jet pipe 63. The outlet plane of the top of the lower jet pipe 9 is coplanar with the upper surface of the operating table 2. The bottom of the lower jet pipe 9 extends to the outside of the base 1 and is connected to an air pump.

[0036] With an external power supply, the hydraulic rod 61 pushes the pressure plate 62 down until it contacts the surface of the workpiece body 4. The upper jet pipe 63 introduces detection gas, which facilitates the infrared thermal imager 76 to detect the airtightness between the pressure plate 62 and the workpiece body 4.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An airtightness testing device for preventing deformation during machining, comprising a base (1); Its features are: The top of the base (1) is fixed with an operating table (2), and the top of the operating table (2) is provided with a workpiece body (4). The top of the workpiece body (4) on the outer side of the operating table (2) is uniformly provided with positioning structures (3). The positioning structure (3) includes limiting grooves (31) uniformly opened on the top of the operating table (2). Each limiting groove (31) is provided with a moving block (32). Each moving block (32) is threadedly connected with a lead screw (33). The positioning structure (3) also includes servo motors (34) uniformly fixed on the outer wall of the operating table (2). Each moving block (32) has a limiting plate (35) fixed at its top. An airtightness detection structure (7) is fixed on one side of the top of the base (1), and an alarm light (8) is fixed on one side of the airtightness detection structure (7) at the top of the base (1).

2. The airtightness detection device for preventing machining deformation according to claim 1, characterized in that: A lower jet pipe (9) is fixed in the middle of the base (1), and a top plate (5) is fixed on the top of the base (1) outside the operating table (2). A pressure holding assembly (6) is fixed on the inner wall of the top of the top plate (5).

3. A hermeticity testing device to prevent machining distortion according to claim 1, characterized in that: The limiting grooves (31) are evenly distributed on the top of the operating table (2). Each of the limiting plates (35) has a rubber protective pad fixed on the side close to the workpiece body (4). Each of the limiting plates (35) has a pressure sensor installed inside. The output end of the pressure sensor inside the limiting plate (35) is electrically connected to the input end of the microcontroller and the servo motor (34).

4. The hermetic test device of claim 1, wherein: One end of each lead screw (33) extends to the outside of the operating table (2) and is fixedly connected to the output end of the servo motor (34). The other end of the lead screw (33) extends to the inside of the operating table (2) and is rotatably connected to the operating table (2).

5. A hermetic test device for preventing machining distortion according to claim 2, characterized in that: The pressure holding assembly (6) includes a hydraulic rod (61), a pressure plate (62) and an upper jet pipe (63). The hydraulic rod (61) is fixed to the inner wall of the top of the top plate (5). The pressure plate (62) is fixed to the bottom end of the hydraulic rod (61). The upper jet pipe (63) is fixed to one side inside the pressure plate (62).

6. A hermetic test device for preventing machining distortion according to claim 5, characterized in that: A hose is fixedly connected to the top end of the upper jet pipe (63), and an air pump is connected to the hose at the top end of the upper jet pipe (63).

7. A hermetic test device for preventing machining distortion according to claim 1, characterized in that: The airtightness detection structure (7) includes a drive motor (71), a lifting seat (72), a lifting block (73), an electric telescopic rod (74), an extension plate (75), an infrared thermal imager (76), and a drive shaft (77). The lifting seat (72) is fixed to one side of the top of the base (1). The drive motor (71) is fixedly installed on the top of the lifting seat (72). The drive shaft (77) is provided on one side inside the lifting seat (72). The lifting block (73) is internally threaded to the drive shaft (77). The electric telescopic rod (74) is fixed on the side of the lifting block (73) near the workpiece body (4). The extension plate (75) is fixed at one end of the electric telescopic rod (74). The infrared thermal imager (76) is fixed on the bottom end of the extension plate (75) near the workpiece body (4).

8. A hermetic test device for preventing machining distortion according to claim 7, characterized in that: The infrared thermal imager (76) is equipped with a microcontroller, and the output of the infrared thermal imager (76) is electrically connected to the input of the alarm light (8) through the microcontroller.

9. A hermetic test device for preventing machining distortion according to claim 7, characterized in that: The top end of the drive shaft (77) extends to the top end of the lifting seat (72) and is fixedly connected to the output end of the drive motor (71). The bottom end of the drive shaft (77) extends into the interior of the lifting seat (72) and is rotatably connected to the lifting seat (72).

10. The hermetic test device of claim 2, wherein: The top outlet plane of the lower jet pipe (9) is coplanar with the upper surface of the operating table (2), and the bottom end of the lower jet pipe (9) extends to the outside of the base (1) and is connected to an external air pump.

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