Withstand voltage detection device of circuit board

Abstract

The invention discloses a withstand voltage detection device of a circuit board, and relates to the field of circuit board physical performance detection, the withstand voltage detection device comprises a detection workbench and a pressure applying mechanism arranged above the detection workbench, the pressure applying mechanism comprises a pressure applying head, a first industrial camera and a second industrial camera, and the pressure applying head has a degree of freedom of moving along the height direction of the detection workbench. A detection groove is formed in the bottom of the pressure applying head, the first industrial camera is installed in the detection groove, a lens of the first industrial camera is arranged close to the detection workbench, a transparent cover plate is installed at the bottom of the pressure applying head, the second industrial camera is installed over the pressure applying head, and the working range of the second industrial camera is larger than the orthographic projection range of the pressure applying head. Under the action of the transparent cover plate, the first industrial camera smoothly detects the deformation and crack conditions of the area, shielded by the pressure applying head, of the circuit board, and the second industrial camera detects the state change of the area, not shielded by the pressure applying head, of the circuit board, so that the pressure resistance of the circuit board can be comprehensively detected, and the detection value is more accurate.

Description

Technical Field

[0001] The invention relates to the field of circuit board physical property detection, in particular to a circuit board withstand voltage detection device. Background Art

[0002] The names of circuit boards include: ceramic circuit board, alumina ceramic circuit board, aluminum nitride ceramic circuit board, circuit board, PCB board, aluminum base board, high-frequency board, thick copper board, impedance board, PCB, ultra-thin circuit board, ultra-thin circuit board, printed (copper etching technology) circuit board, etc. Since the circuit board is basically directly installed, it needs to bear the weight of the electronic components thereon and the external pressure to ensure that there will be no deformation or cracks that affect the use under the pressure of the use environment. Therefore, with the further improvement of the printing technology of printed circuit boards, the thickness requirements and pressure resistance requirements of printed circuit boards are also getting higher and higher. The thickness of the circuit board needs to be thinner and its pressure resistance is higher. For this reason, a pressure test is required before the circuit board is produced to measure the pressure resistance of the circuit board. After the test results meet the requirements, mass production is carried out for use. The current pressure test device squeezes the circuit board through a pressure head to observe the deformation and crack conditions of the circuit board. However, since the pressure head needs to act on the circuit board for testing, the pressure-bearing surface of the circuit board is blocked by the pressure head, and the place where the circuit board deforms or cracks first is often the pressure-applied position, resulting in the inability to detect the deformation and crack conditions of the circuit board in the first time, and thus the relationship between deformation and pressure, and the relationship between crack generation and pressure cannot be accurately obtained. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a withstand voltage detection device for a circuit board to solve the deficiencies of the prior art.

[0004] The objective of the present invention is achieved through the following technical solutions: A circuit board withstand voltage testing device, comprising a testing workbench and a pressure mechanism arranged above the testing workbench, the pressure mechanism comprising a pressure head, a first industrial camera and a second industrial camera, the pressure head has the freedom to move along the height direction of the testing workbench, a testing groove is provided at the bottom of the pressure head, the first industrial camera is installed in the testing groove, the lens of the first industrial camera is arranged close to the testing workbench, a transparent cover is installed at the bottom of the pressure head, the second industrial camera is installed just above the pressure head, and the working range of the second industrial camera is larger than the positive projection range of the pressure head;

[0005] A mounting groove is provided on the top of the detection workbench, a transparent bearing platform is arranged in the mounting groove, a third industrial camera is arranged in the mounting groove, the transparent bearing platform includes a middle rectangular plate and a rectangular frame, the middle rectangular plate is arranged in the rectangular frame, and the middle rectangular plate and the rectangular frame both have the freedom to move along the height direction of the detection workbench.

[0006] Furthermore, the pressure head is provided with a pressure chamber above the detection groove, a pressure sensor is installed in the pressure chamber, and the bottom of the pressure head is provided with two circular holes symmetrically along its own axis, the circular holes are connected to the pressure chamber, a pressure rod is provided in the circular hole, the pressure rod is connected to the transparent cover plate, a pressure plate is provided in contact with the inner bottom wall of the pressure chamber, the pressure plate contacts the detection axis of the pressure sensor, both ends of the pressure plate are connected with horizontal rods, and the two horizontal rods are respectively connected to the two pressure rods.

[0007] Furthermore, a transparent beam is fixed on the top of the pressure head, and the bottom surface of the other end of the transparent beam is connected to a lifting cylinder. The cylinder body of the lifting cylinder is vertically installed on the two-way driving mechanism. The top of the transparent beam is connected to a 7-shaped mounting bracket, and the second industrial camera is installed on the horizontal bottom surface of the 7-shaped mounting bracket.

[0008] Furthermore, the bidirectional driving mechanism includes a fixed base plate, a transverse sliding plate and a longitudinal sliding plate, the top surface of the fixed base plate is provided with a transverse screw groove, a transverse screw is rotatably arranged in the transverse screw groove, a transverse screw slider is threadedly mounted on the transverse screw, the transverse sliding plate is installed on the transverse screw slider, a first motor is installed at one end of the fixed base plate, the output shaft of the first motor is connected to the transverse screw by transmission, the top of the transverse sliding plate is provided with a longitudinal screw groove, a longitudinal screw is rotatably arranged in the longitudinal screw groove, a longitudinal screw slider is threadedly mounted on the longitudinal screw, the longitudinal sliding plate is installed on the longitudinal screw slider, the longitudinal screw is perpendicular to the transverse screw in a horizontal plane, and a second motor is installed at one end of the transverse sliding plate, and the output shaft of the second motor is connected to the longitudinal screw by transmission.

[0009] Furthermore, two adjacent inner walls of the detection workbench are provided with vertical positioning grooves, and the two vertical positioning grooves are connected to form an L-shaped positioning groove, and an L-shaped positioning plate is slidably arranged in the L-shaped positioning groove, and the L-shaped positioning plate has the freedom to move along the height direction of the detection workbench, and a positioning mechanism is arranged on the detection workbench, and the positioning mechanism includes a transverse positioning plate and a longitudinal positioning plate, the transverse positioning plate is parallel to the transverse plate of the L-shaped positioning plate, and the longitudinal positioning plate is parallel to the longitudinal plate of the L-shaped positioning plate, and the transverse positioning plate and the longitudinal positioning plate both move close to or away from the L-shaped positioning plate.

[0010] Furthermore, the detection workbench is provided with a positioning cavity below the vertical positioning groove, an electromagnet is provided in the positioning cavity, the vertical positioning groove and the positioning cavity are connected through a guide hole, a guide rod is slidably provided in the guide hole, the top of the guide rod is connected to the L-shaped positioning plate, the bottom of the guide rod is inserted into the positioning cavity and is connected to a permanent magnet, the electromagnet is energized to generate a magnetic pole with the same magnetic property as the permanent magnet, a positioning spring is sleeved on the guide rod, one end of the positioning spring is connected to the inner top wall of the positioning cavity, and the other end is connected to the permanent magnet, the transverse positioning plate is connected to the telescopic shaft of the first cylinder, and the longitudinal positioning plate is connected to the telescopic shaft of the second cylinder, the cylinder bodies of the first cylinder and the second cylinder are both installed on the detection workbench, and when the positioning spring is in normal state, the bottom surface of the L-shaped positioning plate contacts the bottom surface of the L-shaped positioning groove, and the top surface of the L-shaped positioning plate is flush with the top surface of the detection workbench.

[0011] Furthermore, lifting cylinders are provided on both sides of the bottom of the middle rectangular plate, the cylinder body of the lifting cylinder is vertically installed in the installation groove, and the telescopic shaft of the lifting cylinder is connected to the middle rectangular plate.

[0012] Furthermore, a downward pressure rod is fixed at the four corners of the bottom of the rectangular frame, and each of the downward pressure rods is correspondingly provided with a support block. A T-shaped slide groove is opened at the bottom of the support block, and a T-shaped slide rail is fixed to the bottom surface of the mounting groove. The T-shaped slide rail is slidably adapted to the T-shaped slide groove. The end of the support block away from the jacking cylinder is connected to a first spring, and the first spring is connected to the inner wall of the mounting groove. The top surface of the support block is provided with a wedge-shaped surface, and the downward pressure rod contacts the wedge surface. The telescopic shaft fixing sleeve of the jacking cylinder A lower pressure plate is provided, and the two ends of the lower pressure plate are respectively in contact with the wedge-shaped surfaces of the two support blocks, and each of the lower pressure rods is correspondingly provided with a lower pressure cross plate, and the lower pressure cross plate is fixed on the side wall of the mounting groove, and a passage is opened on the lower pressure cross plate for the lower pressure rod to pass through, and a spring limiting plate is fixedly sleeved on the lower pressure rod, and a second spring is sleeved on the lower pressure rod, and the two ends of the second spring are respectively connected to the spring limiting plate and the lower pressure cross plate, and under the reaction force of the second spring, the lower pressure rod always contacts the wedge-shaped surface of the support block.

[0013] Furthermore, a detection cavity is opened on one side wall of the installation groove, a third cylinder is horizontally installed in the detection cavity, a telescopic shaft of the third cylinder is connected to a first detection plate, and the third industrial camera is installed on the top of the first detection plate.

[0014] Furthermore, a deformation detection cavity is opened on the side wall of the installation groove, a fourth cylinder is horizontally installed in the deformation detection cavity, a telescopic shaft of the fourth cylinder is connected to a second detection plate, and a distance sensor is installed on the top of the second detection plate.

[0015] The beneficial effects of the present invention are:

[0016] 1. The circuit board placed on the testing workbench is squeezed by the pressure head, and the first industrial camera is used to detect the changes in the pressure state of the circuit board within the contact range of the pressure head and the circuit board. Under the action of the transparent cover, the area of ​​the pressure head acting on the circuit board remains unchanged. At the same time, the first industrial camera can successfully detect the deformation and cracks of the circuit board in the area blocked by the pressure head. The second industrial camera is used to detect the state changes of the unblocked area of ​​the circuit board under pressure, so that the pressure resistance performance of the circuit board can be fully tested, making the test value more accurate.

[0017] 2. When testing the deformation performance of the circuit board, the rectangular frame is moved to the bottom of the top surface of the detection workbench, and the middle rectangular plate is moved to the bottom of the rectangular frame, so that the circuit board is located in the installation groove and supported by the rectangular frame. The force is applied by the pressure head, and the relationship between the state change of the circuit board and the applied pressure is detected by the third industrial camera. In this way, the supporting capacity of the circuit board under the tooling at both ends is measured, so that the performance test of the circuit board is more comprehensive and convenient for the subsequent installation and use of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a circuit board withstand voltage detection device according to the present invention Figure 1 ;

[0019] Figure 2 It is a schematic diagram of the internal structure of a pressure applying head in a circuit board withstand voltage detection device of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of a testing workbench in a circuit board withstand voltage testing device of the present invention;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 A partial cross-sectional view of a withstand voltage detection device for a circuit board according to the present invention;

[0023] Figure 6 A schematic diagram of the structure of a circuit board withstand voltage detection device according to the present invention Figure 2 ;

[0024] Figure 7 A schematic diagram of the structure of a circuit board withstand voltage detection device according to the present invention Figure 3 ;

[0025] In the figure, 1-detection workbench, 2-pressure head, 3-first industrial camera, 4-second industrial camera, 5-detection slot, 6-transparent cover, 7-mounting slot, 8-transparent bearing platform, 9-third industrial camera, 10-middle rectangular plate, 11-rectangular frame, 12-pressure chamber, 13-pressure sensor, 14-round hole, 15-pressure rod, 16-pressure plate, 17-horizontal rod, 18-transparent beam, 19-lifting cylinder, 20-7-shaped mounting frame, 21-fixed base plate, 22-lateral sliding plate, 23-longitudinal sliding plate, 24-lateral screw slot, 25-lateral screw, 26-lateral screw slider, 27-first motor, 28-longitudinal screw slot, 29-longitudinal screw, 30-longitudinal screw Slider, 31-second motor, 32-vertical positioning groove, 33-L-shaped positioning plate, 34-lateral positioning plate, 35-longitudinal positioning plate, 36-positioning cavity, 37-electromagnet, 38-guide hole, 39-guide rod, 40-permanent magnet, 41-positioning spring, 42-first cylinder, 43-second cylinder, 44-lifting cylinder, 45-down pressure rod, 46-support block, 47-T-shaped slide rail, 48-first spring, 49-wedge surface, 50-down pressure plate, 51-down pressure horizontal plate, 52-spring limit plate, 53-second spring, 54-detection cavity, 55-third cylinder, 56-first detection plate, 57-deformation detection cavity, 58-fourth cylinder, 59-second detection plate, 60-distance sensor. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0027] Embodiment 1

[0028] like Figures 1 to 7The present invention discloses a circuit board withstand voltage testing device, comprising a testing workbench 1 and a pressure mechanism arranged above the testing workbench 1, wherein the pressure mechanism comprises a pressure head 2, a first industrial camera 3 and a second industrial camera 4, wherein the pressure head 2 has the freedom to move along the height direction of the testing workbench 1, a testing groove 5 is provided at the bottom of the pressure head 2, the first industrial camera 3 is installed in the testing groove 5, the lens of the first industrial camera 3 is arranged close to the testing workbench 1, a transparent cover plate 6 is installed at the bottom of the pressure head 2, the second industrial camera 4 is installed just above the pressure head 2, the working range of the second industrial camera 4 is larger than the positive projection range of the pressure head 2, the circuit board to be tested is placed on the testing workbench 1 manually or by a mechanical arm, and the pressure head 2 is moved downwards. The pressure head 2 is moved close to the circuit board so that the pressure head 2 squeezes the circuit board, and the pressure head 2 gradually increases the pressure. The state change of the circuit board is photographed by the first industrial camera 3 and the second industrial camera 4. Under the action of the transparent cover plate 6, the area of ​​the pressure head 2 acting on the circuit board remains unchanged. At the same time, the first industrial camera 3 can smoothly detect the deformation and crack conditions of the circuit board in the area blocked by the pressure head 2. The state change of the unblocked area of ​​the circuit board under pressure is detected by the second industrial camera 4, so as to obtain the pressure resistance performance of the circuit board, which is convenient for installation in the corresponding use environment according to the pressure resistance performance of the circuit board; an installation groove 7 is provided on the top of the detection workbench 1, and a transparent bearing platform 8 is arranged in the installation groove 7. A third industrial camera 9 is arranged in the installation groove 7, and a transparent cover plate 6 is arranged in the installation groove 7. The transparent carrying platform 8 includes a central rectangular plate 10 and a rectangular frame 11. The central rectangular plate 10 is arranged in the rectangular frame 11. Both the central rectangular plate 10 and the rectangular frame 11 have the freedom to move along the height direction of the detection workbench 1. The circuit board is roughly divided into bottom surface installation and side surface installation in actual installation. The bottom surface of the circuit board contacts the mounting surface for installation, and has a larger contact surface; the side surface of the circuit board contacts the mounting surface to make it suspended for installation, and the contact surface is smaller; therefore, the withstand voltage test of the circuit board needs to simulate the installation states of the above two circuit boards to make the withstand voltage test results more accurate; specifically: the top surface of the central rectangular plate 10, the top surface of the rectangular frame 11 and the top surface of the detection workbench 1 are flush, and the circuit board is placed on the transparent carrying platform 8 for withstand voltage test Pressure test simulates the environment in which the bottom surface of the circuit board is installed, and the state change of the bottom surface of the circuit board under the action of pressure is detected by the third industrial camera 9, so as to cooperate with the first industrial camera 3 and the second industrial camera 4 to realize comprehensive detection of the upper and lower surfaces of the circuit board; then the rectangular frame 11 is moved to the bottom of the top surface of the detection workbench 1, and the middle rectangular plate 10 is moved to the bottom of the rectangular frame 11 to simulate the environment in which the circuit board is installed on the side, so that the circuit board is located in the installation groove 7 and supported by the rectangular frame 11, and the force is applied by the pressure head 2, and the relationship between the state change of the circuit board and the applied pressure is detected by the third industrial camera 9, thereby measuring the supporting capacity of the circuit board under the tooling at both ends, making the performance test of the circuit board more comprehensive and facilitating the subsequent installation and use of the circuit board.

[0029] Embodiment 2

[0030] Based on the first embodiment, Figures 1 to 4 As shown, a detection cavity 54 is provided on one side wall of the mounting groove 7, and a third cylinder 55 is horizontally installed in the detection cavity 54. The telescopic shaft of the third cylinder 55 is connected to a first detection plate 56. The third industrial camera 9 is installed on the top of the first detection plate 56. The first detection plate 56 is driven to move by the telescopic movement of the third cylinder 55, so that the third industrial camera 9 is moved into the mounting groove 7. The shooting range of the third industrial camera 9 can completely cover the area of ​​the mounting groove 7, so as to realize the comprehensive shooting of the bottom surface of the circuit board, monitor the state change of the circuit board under pressure, and obtain the pressure resistance performance of the circuit board; when testing the side installation of the circuit board, the first detection plate 56 is moved into the detection cavity 54, so that the middle rectangular plate 10 can be smoothly moved to the bottom of the first detection plate 56, and then the first detection plate 56 is moved out of the detection cavity 54, so that the middle rectangular plate 10 will not interfere with the first detection plate 56; the mounting groove A deformation detection cavity 57 is provided on the side wall of 7, and a fourth cylinder 58 is horizontally installed in the deformation detection cavity 57. The telescopic shaft of the fourth cylinder 58 is connected to the second detection plate 59, and a distance sensor 60 is installed on the top of the second detection plate 59. When the circuit board is installed on the side, the circuit board is in a suspended state. In this state, the deformation of the circuit board is mainly detected. The camera mainly detects the pressure value when the crack of the circuit board appears. It is not convenient to detect the deformation of the circuit board and the deformation value of the circuit board cannot be obtained. Therefore, a distance sensor 60 is set, and the pressure head 2 acts on the middle part of the circuit board to apply pressure. The fourth cylinder 58 drives the second detection plate 59 to move into the installation groove 7, so that the distance sensor 60 is located directly below the circuit board. The deformation of the middle part of the circuit board is detected by the distance sensor 60, and the relationship between pressure and deformation is obtained, so that the pressure resistance performance detection of the circuit board is more comprehensive and accurate.

[0031] Embodiment 3

[0032] Based on the second embodiment, Figure 1 and Figure 2As shown, the pressure head 2 is provided with a pressure chamber 12 above the detection groove 5, and a pressure sensor 13 is installed in the pressure chamber 12. Two circular holes 14 are symmetrically opened along the axis of the pressure head 2 at the bottom thereof, and the circular holes 14 are connected to the pressure chamber 12. A pressure rod 15 is provided in the circular hole 14, and the pressure rod 15 is connected to the transparent cover plate 6. A pressure plate 16 is provided on the inner bottom wall of the pressure chamber 12 in contact with the detection axis of the pressure sensor 13. Both ends of the pressure plate 16 are connected with horizontal rods 17, and the two horizontal rods 17 are respectively connected to the two pressure rods 15. The top surface of the pressure plate 16 contacts the pressure sensor. 13. The bottom surface of the pressure plate 16 contacts the bottom surface of the pressure chamber 12, thereby limiting the position of the pressure plate 16. The pressure plate 16 is connected to the transparent cover plate 6 through the pressure rod 15, so that the transparent cover plate 6 is stably connected to the pressure head 2. There is a gap between the transparent cover plate 6 and the pressure head 2, so that when the transparent cover plate 6 presses down the circuit board, the transparent cover plate 6 will squeeze the pressure plate 16 through the pressure rod 15, and the pressure plate 16 squeezes the detection axis of the pressure sensor 13, so as to detect the pressure value of the transparent cover plate 6 on the circuit board, and then obtain the linear relationship between the pressure and the deformation of the circuit board, and obtain the relationship between the pressure and the generation of cracks in the circuit board.

[0033] Embodiment 4

[0034] When the side installation mode of the circuit board is subjected to the withstand voltage test, the circuit board needs to be accurately placed in the installation groove 7. Therefore, the circuit board needs to be positioned before the test. For this purpose, based on the third embodiment, as shown in FIG. Figures 1 to 5As shown, two adjacent inner walls of the detection workbench 1 are provided with vertical positioning grooves 32, and the two vertical positioning grooves 32 are connected to form an L-shaped positioning groove, and an L-shaped positioning plate 33 is slidably arranged in the L-shaped positioning groove. The L-shaped positioning plate 33 is connected into an L shape by a transverse plate and a longitudinal plate, and the transverse plate and the longitudinal plate are respectively slidably installed in the two vertical positioning grooves 32, and the L-shaped positioning plate 33 has the freedom to move along the height direction of the detection workbench 1. A positioning mechanism is provided on the detection workbench 1, and the positioning mechanism includes a transverse positioning plate 34 and a longitudinal positioning plate 35. The transverse positioning plate 34 is parallel to the transverse plate of the L-shaped positioning plate 33, and the longitudinal positioning plate 35 is parallel to the longitudinal plate of the L-shaped positioning plate 33. The longitudinal positioning plates 35 are moved close to or away from the L-shaped positioning plate 33. The detection workbench 1 is provided with a positioning cavity 36 below the vertical positioning groove 32. An electromagnet 37 is provided in the positioning cavity 36. The vertical positioning groove 32 is connected to the positioning cavity 36 through a guide hole 38. A guide rod 39 is slidably provided in the guide hole 38. The top of the guide rod 39 is connected to the L-shaped positioning plate 33. The bottom of the guide rod 39 penetrates into the positioning cavity 36 and is connected to a permanent magnet 40. The electromagnet 37 is energized to generate a magnetic pole with the same magnetic property as the permanent magnet 40. A positioning spring 41 is sleeved on the guide rod 39. One end of the positioning spring 40 is connected to the inner top wall of the positioning cavity 36, and the other end is connected to the permanent magnet 40. 34 is connected to the telescopic shaft of the first cylinder 42, and the longitudinal positioning plate 35 is connected to the telescopic shaft of the second cylinder 43. The cylinder bodies of the first cylinder 42 and the second cylinder 43 are both installed on the detection workbench 1. When the positioning spring 40 is in a normal state, the bottom surface of the L-shaped positioning plate 33 contacts the bottom surface of the L-shaped positioning groove, and the top surface of the L-shaped positioning plate 33 is flush with the top surface of the detection workbench 1. The electromagnet 37 is energized to repel the permanent magnet 40, so that the permanent magnet 40 squeezes the positioning spring 40 to drive the guide rod 39 to move upward, and the guide rod 39 drives the L-shaped positioning plate 33 to move upward, so that the top surface height of the L-shaped positioning plate 33 is higher than the top surface height of the detection workbench 1, so that the L-shaped positioning plate 33 forms a positioning reference, and the first cylinder 42 and the second cylinder 43 are installed on the detection workbench 1. The cylinder 42 drives the transverse positioning plate 34 to move close to the transverse plate of the L-shaped positioning plate 33, so that the transverse positioning plate 34 pushes the circuit board to contact the transverse plate to complete the transverse positioning, and then the second cylinder 43 drives the longitudinal positioning plate 35 to move close to the longitudinal plate of the L-shaped positioning plate 33, so that the longitudinal positioning plate 35 pushes the circuit board to contact the longitudinal plate to complete the longitudinal positioning, thereby completing the positioning adjustment of the circuit board, so that the circuit board falls accurately on the rectangular frame 11, and then the transverse positioning plate 34 and the longitudinal positioning plate 35 are reset, and the rectangular frame 11 and the middle rectangular plate 10 move downward, so that the circuit board can fall into the installation groove 7 and be supported by the rectangular frame 11, so that the circuit board is in a suspended state, so as to perform the pressure resistance performance of the circuit board under the side installation;When the circuit board test is completed, the electromagnet 37 is powered off, and the permanent magnet 40 is reset under the reaction force of the positioning spring 40, and the permanent magnet 40 drives the L-shaped positioning plate 33 to move downward and reset, so that the top surface of the L-shaped positioning plate 33 is flush with the top surface of the detection workbench 1, so that when the next circuit board is tested, the circuit board can move smoothly on the detection workbench 1 without being blocked by the L-shaped positioning plate 33.

[0035] Embodiment 5

[0036] Based on the fourth embodiment, Figures 1 to 4 As shown, lifting cylinders 44 are provided on both sides of the bottom of the middle rectangular plate 10, and the cylinder body of the lifting cylinder 44 is vertically installed in the installation groove 7. The telescopic shaft of the lifting cylinder 44 is connected to the middle rectangular plate 10, and the lifting cylinder 44 is installed on the side of the middle rectangular plate 10, so that a detection space is formed between the two lifting cylinders 44, so that the third industrial camera 9 and the ranging sensor 60 can smoothly enter the detection space to perform pressure resistance detection on the circuit board; downward pressing rods 45 are fixed at the four corners of the bottom of the rectangular frame 11, and each downward pressing rod 45 is correspondingly provided with a supporting block 46, and a T-shaped slide groove is opened at the bottom of the supporting block 46, and a T-shaped slide rail 47 is fixed on the bottom surface of the installation groove 7, and the T-shaped slide rail 47 is slidably adapted to the T-shaped slide groove, and the end of the support block 46 away from the lifting cylinder 44 is connected to the first spring 4 8. The first spring 48 is connected to the inner wall of the mounting groove 7. The top surface of the support block 46 is provided with a wedge-shaped surface 49. The lower pressure rod 45 contacts the wedge-shaped surface 49. The telescopic shaft of the lifting cylinder 44 is fixedly sleeved with a lower pressure plate 50. The two ends of the lower pressure plate 50 are respectively in contact with the wedge-shaped surfaces 49 of the two support blocks 46. Each lower pressure rod 45 is correspondingly provided with a lower pressure transverse plate 51. The lower pressure transverse plate 51 is fixed to the side wall of the mounting groove 7. The lower pressure transverse plate 51 is provided with a passage for the lower pressure rod 45 to pass through. A spring limiting plate 52 is fixedly sleeved on the lower pressure rod 45. A second spring 53 is sleeved on the lower pressure rod 45. The two ends of the second spring 53 are respectively connected to the spring limiting plate 52 and the lower pressure transverse plate 51. Under the reaction force of the second spring 53, the lower pressure rod 45 always contacts the wedge-shaped surface 49 of the support block 46. Figure 3 and Figure 4As shown, since the rectangular frame 11 is not directly connected to the driving mechanism, in order to facilitate the positioning of the rectangular frame 11, the mounting groove 7 is a stepped groove. When the top surface of the middle rectangular plate 10 is flush with the top surface of the detection workbench 1, the spring limit plate 52 contacts the step of the mounting groove 7. At this time, the second spring 53 is in a compressed state, and the top surface of the rectangular frame 11 is flush with the top surface of the detection workbench 1, so that the rectangular frame 11 can be positioned, so that when the circuit board is subjected to a withstand voltage test in the bottom surface installation state, the bottom surface of the circuit board can fully contact the detection workbench, so that it has a higher detection accuracy. When the circuit board is subjected to a withstand voltage test in the side installation state, the lifting cylinder 44 drives the middle rectangular plate 10 to move downward, and at the same time, the top The lifting cylinder 44 drives the lower pressing plate 50 to move downward, so that the lower pressing plate 50 squeezes the wedge-shaped surface 49 of the support block 46. Under the action of the wedge-shaped surface 49, the support block 46 squeezes the first spring 48 and moves away from the lower pressing plate 50. Since the second spring 53 is in a compressed state, when the support block 46 moves, the lower pressing rod 45 drives the rectangular frame 11 to move with the support block 46 under the action of the second spring 53, thereby indirectly driving the rectangular frame 11 to move, so that the top surface of the rectangular frame 11 is located below the top surface of the detection workbench 1. When the lower pressing plate 50 contacts the side wall of the support block 46 through the wedge-shaped surface 49 of the support block 46, the support block 46 no longer moves, and the rectangular frame 11 moves downward to the specified position. The lifting cylinder 44 drives the middle rectangular plate 10 to continue to move downward, and the lower pressure plate 50 contacts the side wall of the support block 46 to move, so that the support block 46 remains stable under the action of the lower pressure plate 50 and the first spring 48. The lower pressure rod 45 stably contacts the wedge surface 49 of the support block 46 under the action of the second spring 53, thereby maintaining the position of the rectangular frame 11 stable. The lifting cylinder 44 drives the middle rectangular plate 10 to move below the detection cavity 54 and the deformation detection cavity 57, so that the circuit board is installed in the air, and at the same time it will not block the distance measuring sensor 60 and the third industrial camera 9 from working, so that the middle rectangular plate 10 and the rectangular frame 11 can be driven to move at the same time through a driving device, and the middle rectangular plate 10 and The moving distances of the rectangular frame 11 are different, forming a height difference, realizing the suspended installation of the circuit board, so as to carry out the pressure test of the side installation of the circuit board; when the test is completed, the lifting cylinder 44 drives the middle rectangular plate 10 to reset upward, and at the same time, the lifting cylinder 44 drives the lower pressure plate 50 to reset and disengage from the support block 46, and the support block 46 is reset under the reaction force of the first spring 48, and the support block 46 will lift the lower pressure rod 45 to drive the rectangular frame 11 to reset upward. It should be noted that the reaction force generated by the first spring 48 is much greater than the force generated by the second spring 53, so that the support block 46 can smoothly lift the lower pressure rod 45, so that the spring limit block 52 contacts the stepped surface of the installation groove 7 to complete the positioning of the rectangular frame 11.

[0037] Embodiment 6

[0038] Based on Example 5, Figures 1 to 7As shown, a transparent crossbeam 18 is fixed on the top of the pressure head 2, and a lifting cylinder 19 is connected to the bottom surface of the other end of the transparent crossbeam 18. The cylinder body of the lifting cylinder 19 is vertically installed on the two-way driving mechanism. A 7-shaped mounting bracket 20 is connected to the top of the transparent crossbeam 18. The second industrial camera 4 is installed on the horizontal bottom surface of the 7-shaped mounting bracket 20. The transparent crossbeam 18 is made of transparent material and will not block the shooting of the second industrial camera 4. The two-way driving mechanism includes a fixed base plate 21, a transverse sliding plate 22 and a longitudinal sliding plate 23. The top surface of the fixed base plate 21 is provided with a transverse sliding plate 23. A transverse screw rod groove 24 is provided in the transverse screw rod groove 24 for rotation. A transverse screw rod slider 26 is threadedly mounted on the transverse screw rod 25. The transverse sliding plate 22 is mounted on the transverse screw rod slider 26. A first motor 27 is mounted on one end of the fixed base plate 21. The output shaft of the first motor 27 is connected to the transverse screw rod 25. A longitudinal screw rod groove 28 is provided on the top of the transverse sliding plate 22. A longitudinal screw rod 29 is rotatably mounted in the longitudinal screw rod groove 28. A longitudinal screw rod slider 30 is threadedly mounted on the longitudinal screw rod 29. The longitudinal sliding plate 23 is mounted on the longitudinal screw rod slider 30. The longitudinal screw rod 29 is perpendicular to the transverse screw rod 25 in the horizontal plane. A second motor 31 is installed at one end of the transverse sliding plate 22. The output shaft of the second motor 31 is connected to the longitudinal screw rod 29. The first motor 27 drives the transverse screw rod 25 to rotate, so that the transverse screw rod slider 26 moves linearly along the axial direction of the transverse screw rod 25, so that the transverse screw rod slider 26 drives the transverse sliding plate 22 to move. The second motor 31 drives the longitudinal screw rod 29 to rotate, so that the longitudinal screw rod slider 30 moves linearly along the axial direction of the longitudinal screw rod 29, so that the longitudinal screw rod slider 30 drives the longitudinal sliding plate 23 to move. The moving direction of the lateral sliding plate 22 is perpendicular to the moving direction of the longitudinal screw slider 30 in the horizontal plane, so that the pressure head 2 has the freedom of movement along the X and Y axis directions in the spatial coordinate system, and can change the pressure position of the pressure head 2 on the circuit board. The transparent beam 18 is driven up and down by the lifting cylinder 19, so that the pressure head 2 has the freedom of movement along the Z axis direction in the spatial coordinate system. When the bottom surface of the circuit board is installed, the pressure position can be changed, and pressure can be applied to different areas of the circuit board to determine the impact of increased pressure at different positions of the circuit board on the pressure resistance performance.

Claims

1. A circuit board withstand voltage detection device, characterized in that: The invention comprises a detection workbench (1) and a pressure mechanism arranged above the detection workbench (1), wherein the pressure mechanism comprises a pressure head (2), a first industrial camera (3) and a second industrial camera (4), wherein the pressure head (2) has the freedom to move along the height direction of the detection workbench (1), a detection groove (5) is provided at the bottom of the pressure head (2), the first industrial camera (3) is installed in the detection groove (5), the lens of the first industrial camera (3) is arranged close to the detection workbench (1), a transparent cover plate (6) is installed at the bottom of the pressure head (2), the second industrial camera (4) is installed directly above the pressure head (2), and the working range of the second industrial camera (4) is larger than the positive projection range of the pressure head (2); The top of the detection workbench (1) is provided with a mounting groove (7), a transparent bearing platform (8) is arranged in the mounting groove (7), a third industrial camera (9) is arranged in the mounting groove (7), the transparent bearing platform (8) comprises a middle rectangular plate (10) and a rectangular frame (11), the middle rectangular plate (10) is arranged in the rectangular frame (11), and the middle rectangular plate (10) and the rectangular frame (11) both have the freedom to move along the height direction of the detection workbench (1).

2. A circuit board withstand voltage detection device according to claim 1, characterized in that: The pressure head (2) is provided with a pressure chamber (12) above the detection groove (5), and a pressure sensor (13) is installed in the pressure chamber (12). The bottom of the pressure head (2) is provided with two circular holes (14) symmetrically along its own axis, and the circular holes (14) are connected to the pressure chamber (12). A pressure rod (15) is provided in the circular hole (14), and the pressure rod (15) is connected to the transparent cover plate (6). A pressure plate (16) is provided in contact with the inner bottom wall of the pressure chamber (12), and the pressure plate (16) contacts the detection axis of the pressure sensor (13). Both ends of the pressure plate (16) are connected to horizontal rods (17), and the two horizontal rods (17) are respectively connected to the two pressure rods (15).

3. A circuit board withstand voltage detection device according to claim 1, characterized in that: A transparent crossbeam (18) is fixed on the top of the pressure head (2), and a lifting cylinder (19) is connected to the bottom surface of the other end of the transparent crossbeam (18). The cylinder body of the lifting cylinder (19) is vertically mounted on a two-way driving mechanism. A 7-shaped mounting frame (20) is connected to the top of the transparent crossbeam (18), and the second industrial camera (4) is mounted on the horizontal bottom surface of the 7-shaped mounting frame (20).

4. A circuit board withstand voltage detection device according to claim 3, characterized in that: The bidirectional driving mechanism comprises a fixed base plate (21), a transverse sliding plate (22) and a longitudinal sliding plate (23); a transverse screw rod groove (24) is provided on the top surface of the fixed base plate (21); a transverse screw rod (25) is rotatably arranged in the transverse screw rod groove (24); a transverse screw rod slider (26) is threadedly sleeved on the transverse screw rod (25); the transverse sliding plate (22) is mounted on the transverse screw rod slider (26); a first motor (27) is mounted on one end of the fixed base plate (21); an output shaft of the first motor (27) is drivingly connected to the transverse screw rod (26) 25), a longitudinal screw groove (28) is provided on the top of the transverse sliding plate (22), a longitudinal screw rod (29) is rotatably arranged in the longitudinal screw rod groove (28), a longitudinal screw rod slider (30) is threadedly sleeved on the longitudinal screw rod (29), the longitudinal sliding plate (23) is mounted on the longitudinal screw rod slider (30), the longitudinal screw rod (29) is perpendicular to the transverse screw rod (25) on a horizontal plane, a second motor (31) is installed at one end of the transverse sliding plate (22), and the output shaft of the second motor (31) is drivingly connected to the longitudinal screw rod (29).

5. The withstand voltage detection device for a circuit board according to claim 1, characterized in that: Two adjacent inner walls of the detection workbench (1) are provided with vertical positioning grooves (32), and the two vertical positioning grooves (32) are connected to form an L-shaped positioning groove. An L-shaped positioning plate (33) is slidably arranged in the L-shaped positioning groove, and the L-shaped positioning plate (33) has the freedom to move along the height direction of the detection workbench (1). The detection workbench (1) is provided with a positioning mechanism, and the positioning mechanism includes a transverse positioning plate (34) and a longitudinal positioning plate (35). The transverse positioning plate (34) is parallel to the transverse plate of the L-shaped positioning plate (33), and the longitudinal positioning plate (35) is parallel to the longitudinal plate of the L-shaped positioning plate (33). The transverse positioning plate (34) and the longitudinal positioning plate (35) both move closer to or away from the L-shaped positioning plate (33).

6. A circuit board withstand voltage detection device according to claim 5, characterized in that: The detection workbench (1) is provided with a positioning cavity (36) below the vertical positioning groove (32), an electromagnet (37) is provided in the positioning cavity (36), the vertical positioning groove (32) and the positioning cavity (36) are connected via a guide hole (38), a guide rod (39) is slidably provided in the guide hole (38), the top of the guide rod (39) is connected to the L-shaped positioning plate (33), the bottom of the guide rod (39) penetrates into the positioning cavity (36) and is connected to a permanent magnet (40), the electromagnet (37) generates a magnetic pole with the same magnetic property as the permanent magnet (40) when energized, and a positioning rod (40) is sleeved on the guide rod (39). A positioning spring (41), one end of the positioning spring (40) is connected to the inner top wall of the positioning cavity (36), and the other end is connected to the permanent magnet (40), the transverse positioning plate (34) is connected to the telescopic shaft of the first cylinder (42), and the longitudinal positioning plate (35) is connected to the telescopic shaft of the second cylinder (43), the cylinder bodies of the first cylinder (42) and the second cylinder (43) are both installed on the detection workbench (1), when the positioning spring (40) is in a normal state, the bottom surface of the L-shaped positioning plate (33) contacts the bottom surface of the L-shaped positioning groove, and the top surface of the L-shaped positioning plate (33) is flush with the top surface of the detection workbench (1).

7. A circuit board withstand voltage detection device according to claim 1, characterized in that: Lifting cylinders (44) are provided on both sides of the bottom of the middle rectangular plate (10); the cylinder body of the lifting cylinder (44) is vertically installed in the installation groove (7); and the telescopic shaft of the lifting cylinder (44) is connected to the middle rectangular plate (10).

8. A circuit board withstand voltage detection device according to claim 7, characterized in that: A downward pressing rod (45) is fixed at each of the four corners of the bottom of the rectangular frame (11), and each of the downward pressing rods (45) is correspondingly provided with a supporting block (46). A T-shaped sliding groove is provided at the bottom of the supporting block (46), and a T-shaped sliding rail (47) is fixed to the bottom surface of the mounting groove (7). The T-shaped sliding rail (47) is slidably adapted to the T-shaped sliding groove. The end of the supporting block (46) away from the lifting cylinder (44) is connected to a first spring (48), and the first spring (48) is connected to the inner wall of the mounting groove (7). A wedge-shaped surface (49) is provided on the top surface of the supporting block (46), and the downward pressing rod (45) contacts the wedge-shaped surface (49). The telescopic shaft of the lifting cylinder (44) is fixedly sleeved with a downward pressing plate (50). The two ends of the lower pressure plate (50) are respectively in contact with the wedge-shaped surfaces (49) of the two support blocks (46); each of the lower pressure rods (45) is correspondingly provided with a lower pressure transverse plate (51); the lower pressure transverse plate (51) is fixed on the side wall of the mounting groove (7); a passage is provided on the lower pressure transverse plate (51) for the lower pressure rod (45) to pass through; a spring limiting plate (52) is fixedly sleeved on the lower pressure rod (45); a second spring (53) is sleeved on the lower pressure rod (45); the two ends of the second spring (53) are respectively connected to the spring limiting plate (52) and the lower pressure transverse plate (51); under the reaction force of the second spring (53), the lower pressure rod (45) always contacts the wedge-shaped surface (49) of the support block (46).

9. A circuit board withstand voltage detection device according to claim 1, characterized in that: A detection cavity (54) is provided on one side wall of the installation groove (7), a third cylinder (55) is horizontally installed in the detection cavity (54), a telescopic shaft of the third cylinder (55) is connected to a first detection plate (56), and the third industrial camera (9) is installed on the top of the first detection plate (56).

10. A circuit board withstand voltage detection device according to claim 9, characterized in that: A deformation detection cavity (57) is provided on the side wall of the installation groove (7), a fourth cylinder (58) is horizontally installed in the deformation detection cavity (57), a telescopic shaft of the fourth cylinder (58) is connected to a second detection plate (59), and a distance sensor (60) is installed on the top of the second detection plate (59).

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