An IGBT product pressure testing device

Abstract

The present invention relates to the technical field of pressure detection, and discloses a pressure testing device for IGBT products, including a base. The upper outer surface of the base is fixedly connected with a support frame. The upper outer surface of the support frame is fixedly connected with a hydraulic device. On one side of the upper outer surface of the support frame near the hydraulic device, an air pump is provided. The lower outer surface of the air pump is fixedly connected with a hose. The lower outer surface of the hydraulic device is fixedly connected with a pressing block. Glass windows are arranged on both sides of the support frame. The front outer surface of the support frame is rotatably connected with a door panel. A placement groove is opened at the middle position of the upper outer surface of the base. This pressure testing device for IGBT products has the advantages of being convenient for detecting the whole product, facilitating real-time understanding of the product state during detection, and avoiding product cracking and flying fragments from hurting people, solving the problems of incomplete pressure detection of the whole product and product cracking and flying out to hurt people.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure detection, and particularly to a pressure testing device for IGBT products. Background Art

[0002] Insulated Gate Bipolar Transistor, namely IGBT, is a common semiconductor device, which combines the advantages of Metal-Oxide-Semiconductor Field-Effect Transistor and Bipolar Transistor, and has a series of advantages such as high input impedance, small control power, simple drive circuit, high switching speed, large current density, low saturation voltage drop, and strong current handling capacity.

[0003] In the existing IGBT products, pressure detection is often required during factory production. In the actual use process, due to the different shapes of the products, the pressure detected during the detection process is only the protruding part of the product, and the pressure detection of each part of the whole is not complete. During the detection, the real-time state of the product cannot be clearly understood, and it cannot be well protected, which easily leads to the cracking of the product during detection, and the fragments fly out and hurt people. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a pressure testing device for IGBT products, which has the advantages of being convenient to detect the whole product, facilitating the detection to understand the state of the product in real time, and avoiding the cracking of the product and the fragments flying out and hurting people, and solves the problems of incomplete pressure detection of the whole product and the cracking of the product and the fragments flying out and hurting people.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solutions: A pressure testing device for IGBT products, including a base, the upper outer surface of the base is fixedly connected with a support frame, the upper outer surface of the support frame is fixedly connected with a hydraulic device, a gas pump is arranged on one side of the upper outer surface of the support frame close to the hydraulic device, the lower outer surface of the gas pump is fixedly connected with a hose, the lower outer surface of the hydraulic device is fixedly connected with a pressing block, glass windows are arranged on both sides of the support frame, a door panel is rotatably connected to the front outer surface of the support frame, and a placement groove is opened at the middle position of the upper outer surface of the base.

[0008] Preferably, a pressure sensing plate is provided at the lower end of the placement groove on the base. A support block is fixedly connected to the upper outer surface of the pressure sensing plate. Cameras are provided on both inner surfaces of the placement groove. A slot is provided at the middle position of the upper outer surface of the support block. A plug rod is slidably connected to the inner surface of the slot on the support block. A support column is fixedly connected to the upper end of the plug rod. A spring is slidably connected to the outer circular surface of the plug rod. An air cavity is provided at a position near the upper end inside the pressing block. A hydraulic block is slidably connected to the lower outer surface of the pressing block. A first slider is fixedly connected to the upper position of the right outer surface of the hydraulic block. A second chute is provided at the middle position of the right outer surface of the hydraulic block. A first chute is provided on the left outer surface of the hydraulic block. A second slider is fixedly connected to the left inner surface of the first chute on the hydraulic block.

[0009] Preferably, the number of the hydraulic blocks is several, and they are arranged in a rectangle inside the pressing block. The number of the first sliders on a single hydraulic block is two, and they are symmetrically arranged on the hydraulic block with the second chute as the center.

[0010] Preferably, the cameras and the pressure sensors are both externally connected to a display. The number of the cameras is two, and they are symmetrically arranged left and right inside the placement groove.

[0011] Preferably, the second chute on adjacent hydraulic blocks is slidably connected to the second slider, the first slider is slidably connected to the first chute, and the lengths of the second chute and the first chute on the hydraulic block are half of the length of the hydraulic block.

[0012] Preferably, the number of the support columns, the plug rods, and the support blocks is several, and they are all arranged in a rectangle inside the placement groove. A single support column, plug rod, and support block form a telescopic structure.

[0013] Compared with the prior art, the present invention provides an IGBT product pressure testing device, which has the following beneficial effects:

[0014] 1. For this IGBT product pressure testing device, through the fixed block and the support column, the overall pressure detection of the product can be ensured, facilitating the tester to directly receive the status of the product in real time.

[0015] 2. For this IGBT product pressure testing device, through the shielding of the door panel, the glass window, and the placement groove, the phenomenon of the product cracking and flying out and hurting people is avoided, and it is convenient for the user to observe the internal detection situation not only through the camera but also through the glass window. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 Schematic diagram of the overall internal structure of the present invention;

[0018] Figure 3 Schematic diagram of the combined structure of the support column and the support block of the present invention;

[0019] Figure 4 Top view schematic diagram of the base structure of the present invention;

[0020] Figure 5 Schematic diagram of the hydraulic block structure of the present invention;

[0021] Figure 6 Schematic diagram of the internal structure of the pressing block of the present invention.

[0022] Wherein: 1. Base; 2. Support frame; 3. Glass window; 4. Door panel; 5. Hydraulic device; 6. Air pump; 7. Hose; 8. Pressing block; 9. Placing groove; 10. Pressure sensing plate; 11. Camera; 12. Support column; 13. Insert rod; 14. Spring; 15. Support block; 16. Slot; 17. Air cavity; 18. Hydraulic block; 19. First slider; 20. Second sliding groove; 21. First sliding groove; 22. Second slider. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Example 1, as Figures 1-4As shown in the figure, an IGBT product pressure testing device includes a base 1. The upper outer surface of the base 1 is fixedly connected with a support frame 2. The upper outer surface of the support frame 2 is fixedly connected with a hydraulic device 5. On one side of the upper outer surface of the support frame 2 close to the hydraulic device 5, an air pump 6 is provided. The lower outer surface of the air pump 6 is fixedly connected with a hose 7. The lower outer surface of the hydraulic device 5 is fixedly connected with a pressing block 8. On both sides of the support frame 2, there are glass windows 3. The front outer surface of the support frame 2 is rotatably connected with a door panel 4. In the middle position of the upper outer surface of the base 1, a placement groove 9 is opened. Just place the IGBT product into the placement groove 9 on the base 1, then close the door panel 4, then turn on the camera 11 and the pressure sensing plate 10, and then start the hydraulic device 5 located on the support frame 2. The hydraulic device 5 pushes the pressing block 8 to descend until the pressing block 8 moves down into the interior of the placement groove 9. As the hydraulic device 5 continues to start, the hydraulic block 18 on the pressing block 8 will come into contact with the IGBT product accordingly. Through the fixing block and the support column, it is possible to ensure the overall pressure detection of the product, facilitating the tester to monitor the state of the product in real time.

[0025] Embodiment 2, as Figures 1-5As shown, a pressure sensing plate 10 is provided at the lower end of the placement groove 9 on the base 1. A support block 15 is fixedly connected to the upper outer surface of the pressure sensing plate 10. Cameras 11 are provided on the inner surfaces of both sides of the placement groove 9. A slot 16 is opened at the middle position of the upper outer surface of the support block 15. A plug rod 13 is slidably connected to the inner surface of the slot 16 on the support block 15. The upper end of the plug rod 13 is fixedly connected to a support column 12. A spring 14 is slidably connected to the outer cylindrical surface of the plug rod 13. An air cavity 17 is opened at a position near the upper end inside the pressing block 8. A hydraulic block 18 is slidably connected to the lower outer surface of the pressing block 8. A first slider 19 is fixedly connected to the upper right outer surface of the hydraulic block 18. A second chute 20 is opened at the middle position of the right outer surface of the hydraulic block 18. A first chute 21 is opened on the left outer surface of the hydraulic block 18. A second slider 22 is fixedly connected to the left inner surface of the first chute 21 on the hydraulic block 18. When the hydraulic block 18 moves downward, it will drive the first slider 19 to move in the first chute 21 and the second slider 22 to move in the second chute 20, thereby making the hydraulic block 18 closely adhere to the surface of the product. Then, continue to start the hydraulic device 5. The hydraulic device 5 will push the product to start applying pressure to the support column 12. The support column 12 will compress the spring 14 under pressure, and the plug rod 13 of the support column 12 will be inserted into the slot 16 until the plug rod 13 is inserted into the slot 16. At this time, the lower outer surfaces of the product can be in contact with the product iron through multiple support columns 12. As the hydraulic device 5 continues to descend, it will push the support block 15 to start applying pressure to the pressure sensing rod. Through the pressure detected by the pressure detection plate and the picture transmitted from the camera 11, the state of the product under various pressures can be observed in real time, which is convenient for the operator to judge. And if the product is unqualified, through the shielding of the door panel 4, the glass window 3 and the placement groove 9, the phenomenon of the product cracking and flying out and hurting people is avoided.

[0026] Working principle: When using this device, first open the door panel 4, place the IGBT product into the placement groove 9 on the base 1, then close the door panel 4. Then turn on the camera 11 and the pressure sensing plate 10, and then start the hydraulic device 5 located on the support frame 2. The hydraulic device 5 pushes the pressing block 8 downward until the pressing block 8 moves into the interior of the placement groove 9. As the hydraulic device 5 continues to start, the hydraulic block 18 on the pressing block 8 will come into contact with the IGBT product. Since the shape of the IGBT product is irregular, when the inspector observes through the camera 11 that the pressing block 8 touches the product, start the air pump 6. The gas enters the interior of the air chamber 17 through the hose 7, thereby starting to push the hydraulic block 18 downward. The downward movement of the hydraulic block 18 will drive the first slider 19 to move in the first chute 21 and the second slider 22 to move in the second chute 20, and further will make the hydraulic block 18 closely adhere to the surface of the product. Then continue to start the hydraulic device 5, and the hydraulic device 5 will push the product to start exerting pressure on the support column 12. The support column 12 will be pressed to squeeze the spring 14 under the pressure, and the insertion rod 13 of the support column 12 will insert into the slot 16 until the insertion rod 13 is inserted into the slot 16. At this time, through multiple support columns 12, the outer surface of the lower end of the product can be in contact with the product iron. As the hydraulic device 5 continues to descend, it will push the support block 15 to start exerting pressure on the pressure sensing rod. Through the pressure detected by the pressure detection plate and the picture transmitted from the camera 11, the state of the product under various pressures can be observed in real time, which is convenient for the operator to judge. And if the product is unqualified, through the shielding of the door panel 4, the glass window 3 and the placement groove 9, the phenomenon of the product cracking and flying out and hurting people is avoided.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An IGBT product pressure testing device, comprising a base (1), characterized in that: The upper outer surface of the base (1) is fixedly connected with a support frame (2). The upper outer surface of the support frame (2) is fixedly connected with a hydraulic device (5). On one side of the upper outer surface of the support frame (2) close to the hydraulic device (5), an air pump (6) is arranged. The lower outer surface of the air pump (6) is fixedly connected with a hose (7). The lower outer surface of the hydraulic device (5) is fixedly connected with a pressing block (8). On both sides of the support frame (2), glass windows (3) are arranged. The front outer surface of the support frame (2) is rotatably connected with a door panel (4). In the middle position of the upper outer surface of the base (1), a placement groove (9) is opened; At the lower end of the placement groove (9) on the base (1), a pressure sensing plate (10) is arranged. The upper outer surface of the pressure sensing plate (10) is fixedly connected with a support block (15). On both inner surfaces of the two sides of the placement groove (9), cameras (11) are arranged. In the middle position of the upper outer surface of the support block (15), a slot (16) is opened. Inside the slot (16) on the support block (15), a plug rod (13) is slidably connected. The upper end of the plug rod (13) is fixedly connected with a support column (12). A spring (14) is slidably connected to the outer circular surface of the plug rod (13). At a position close to the upper end inside the pressing block (8), an air cavity (17) is opened. The lower outer surface of the pressing block (8) is slidably connected with a hydraulic block (18). On the upper right outer surface of the hydraulic block (18), a first slider (19) is fixedly connected. In the middle position of the right outer surface of the hydraulic block (18), a second chute (20) is opened. On the left outer surface of the hydraulic block (18), a first chute (21) is opened. On the left inner surface of the first chute (21) on the hydraulic block (18), a second slider (22) is fixedly connected; The number of the hydraulic blocks (18) is several, and they are arranged in a rectangle inside the pressing block (8). The number of the first sliders (19) on a single hydraulic block (18) is two, and they are symmetrically arranged on the hydraulic block (18) with the second chute (20) as the center. The number of the support columns (12), plug rods (13), and support blocks (15) is several, and they are all arranged in a rectangle inside the placement groove (9). A single support column (12), plug rod (13), and support block (15) form a telescopic structure.

2. The IGBT product pressure testing device according to claim 1, characterized in that: The cameras (11) and the pressure sensors are externally connected to a display. The number of the cameras (11) is two, and they are symmetrically arranged left and right inside the placement groove (9).

3. The IGBT product pressure testing device according to claim 1, characterized in that: The second chute (20) on two adjacent hydraulic blocks (18) is slidably connected with the second slider (22). The first slider (19) is slidably connected with the first chute (21). The lengths of the second chute (20) and the first chute (21) on the hydraulic block (18) are half of the length of the hydraulic block (18).

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