A new energy vehicle circuit board pre-test test bench

Abstract

The present invention belongs to the field of circuit board detection technology, and in particular, relates to a new energy vehicle circuit board pre-inspection test bench, including a base, and also including: a bidirectional moving mechanism, a pressurized bending mechanism, a temperature control auxiliary mechanism, two sets of clamping and locking mechanisms, a plate thickness detection feedback mechanism, a bending degree confirmation mechanism, a bottom support measurement mechanism and a PLC controller. The present invention can quickly pressurize and bend the circuit board to a preset curvature, and in the process of pressurized bending, automatically match the bending change of the circuit board to automatically adjust the distance between the two ends and the bending inclination of the circuit board, avoid the problem of additional force generated by the fixing of the ends of the circuit board, thereby affecting the accuracy of the test results, and can cooperate with the pressurized bending mechanism to quickly fix the bent circuit board, so that the circuit board can naturally complete the reset deformation, and quickly detect the final reset deformation degree of the circuit board, and automatically judge the toughness strength of the circuit board.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit board detection, and in particular relates to a new energy vehicle circuit board pre-detection test bench. Background Art

[0002] New energy vehicle circuit boards are a key component of new energy vehicle electronic systems. Circuit boards provide a platform for installation and connection of various electronic components such as chips, sensors, capacitors, etc., enabling them to work together to realize various functions of the vehicle, such as power control, battery management, and in-vehicle entertainment.

[0003] Among them, the toughness test of new energy vehicle circuit boards is of great significance. Since new energy vehicles are usually equipped with a large number of battery packs and electric drive systems, these components will generate greater vibration and impact force when working. Good toughness can prevent the circuit boards from breaking or being damaged under these stresses, ensuring that they can work stably for a long time; the operating temperature range of new energy vehicles is usually wider than that of traditional vehicles. The battery pack will generate a lot of heat during the charging and discharging process, which will increase the temperature around the circuit boards. New energy vehicles operate at different ambient temperatures, and the circuit boards will experience a process of thermal expansion and contraction. Circuit boards with good toughness can better adapt to the stress caused by temperature changes and avoid cracking or deformation caused by temperature changes.

[0004] At present, the toughness test of the circuit board is to first fix the two ends of the circuit board with a clamp, then apply pressure to the circuit board to make the circuit board bend to a preset bending degree, and then test the circuit board's ability to reset after the pressure is lost, so as to determine the toughness strength of the circuit board. However, since the two ends of the circuit board are fixed by the clamp, the ends of the circuit board will not move during the process of pressurized bending, which will cause bending, affecting the test results. In addition, the fixing of the two ends will cause friction between the ends of the circuit board and the clamp, further affecting the test results, and affecting the subsequent reset of the circuit board, thereby causing errors in the judgment of the toughness strength of the circuit board. Not using a clamp will affect the test results due to the displacement deviation of the circuit board during the pressure process. Summary of the invention

[0005] The purpose of the present invention is to provide a new energy vehicle circuit board pre-test test bench in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a new energy vehicle circuit board pre-test test bench, including a base, and also including:

[0007] A two-way moving mechanism is fixedly mounted on the upper end of the base;

[0008] A pressurized bending mechanism is fixedly mounted on the rear side of the upper end of the base;

[0009] A temperature control auxiliary mechanism, fixedly mounted on the pressurizing and bending mechanism;

[0010] Two sets of clamping and locking mechanisms are symmetrically fixed on the moving ends of the bidirectional moving mechanism;

[0011] A plate thickness detection feedback mechanism is fixedly mounted on the upper end of one set of the clamping and locking mechanisms;

[0012] A bending degree confirmation mechanism is fixedly mounted on the front side of the bidirectional moving mechanism and is transmission-connected to the clamping and locking mechanism;

[0013] A bottom support measuring mechanism is fixedly mounted on the upper end of the base and is arranged opposite to the output end of the pressurizing and bending mechanism;

[0014] The PLC controller is fixedly mounted on the side wall of the pressurized bending mechanism and is respectively electrically connected to the bidirectional moving mechanism, the pressurized bending mechanism, the temperature control auxiliary mechanism, the clamping and locking mechanism, the plate thickness detection feedback mechanism, the bending degree confirmation mechanism and the bottom support measurement mechanism.

[0015] In the above-mentioned new energy vehicle circuit board pre-inspection test bench, the bidirectional moving mechanism includes two side plates symmetrically fixedly installed on the upper end of the base, a dual-axis motor is fixedly installed at the middle position of the upper end of the base, and the output ends of the dual-axis motor are fixedly connected with a rotating screw, and the end of the rotating screw away from the dual-axis motor is rotatably connected to the side wall of the side plate through a bearing, and the rod wall of the rotating screw is threadedly sleeved with a moving seat, and the upper end of the moving seat is fixedly connected with a U-shaped support plate.

[0016] In the above-mentioned new energy vehicle circuit board pre-inspection test bench, the pressurized bending mechanism includes an L-shaped vertical plate fixedly mounted on the upper end of the base, and the horizontal part of the L-shaped vertical plate is symmetrically fixed with two electric push rods, and the lower moving ends of the two electric push rods are fixedly connected to the same lifting plate, and a pressurized plate is fixedly mounted on the lower end of the lifting plate.

[0017] In the above-mentioned new energy vehicle circuit board pre-inspection test bench, the temperature control auxiliary mechanism includes two electric push-pull rods symmetrically fixedly inserted into the side walls of the vertical part of the L-shaped vertical plate, and the front movable ends of the two electric push-pull rods are fixedly connected to the same U-shaped temperature control plate, and multiple electric heating rods arranged side by side are installed on the upper and lower sides of the inner wall of the U-shaped temperature control plate.

[0018] In the above-mentioned new energy vehicle circuit board pre-inspection test bench, the clamping and locking mechanism includes a clamping frame arranged on the inner side of the upper end of the U-shaped support plate, and the inner side of the upper end of the U-shaped support plate is rotatably connected to two symmetrically arranged electric telescopic rods through a transmission shaft, and the movable ends of the two electric telescopic rods are fixedly connected to the outer wall of the clamping frame, and the rear end of the transmission shaft located on the rear side penetrates and extends out of the U-shaped support plate, and is fixedly connected to a connecting permanent magnet plate, and an insulating cylinder covered on the outside of the connecting permanent magnet plate is fixedly installed on the rear side of the upper end of the U-shaped support plate, and the insulating cylinder is fixedly installed on the rear side of the upper end of the U-shaped support plate. The inner wall of the edge tube is fixedly provided with a connecting electromagnetic plate which is in contact with the connecting permanent magnetic plate, the upper end of the clamping frame is symmetrically fixed with a plurality of fixed tubes, a pushing rod is movably inserted in the fixed tube, the lower ends of the plurality of pushing rods are fixedly connected with the same crimping plate, the upper ends of the plurality of pushing rods are fixedly connected with the same pushing plate, the lower end of the pushing plate and the upper end of the clamping frame are fixedly connected with a plurality of return springs which are sleeved outside the pushing rod, a positioning electromagnetic block is embedded in the fixed tube, and a positioning permanent magnetic strip which is in contact with the positioning electromagnetic block is embedded in the rod wall of the pushing rod.

[0019] In the above-mentioned new energy vehicle circuit board pre-inspection test bench, the board thickness detection feedback mechanism includes a feedback shell fixedly mounted on the upper end of the clamping frame, a feedback resistor rod arranged parallel to the pushing rod is fixedly mounted on the inner wall of the feedback shell, and a feedback conductive contact piece is fixedly mounted on one side of the pushing plate, and the feedback conductive contact piece extends into the feedback shell through a strip opening provided on the side wall of the feedback shell, and is in electrical contact with the feedback resistor rod.

[0020] In the above-mentioned new energy vehicle circuit board pre-inspection test bench, the bending degree confirmation mechanism includes a mounting circular shell fixedly mounted on the front side of the upper end of the U-shaped support plate, the front end of the transmission shaft penetrates and extends out of the U-shaped support plate, and is fixedly connected with an extension rod, and the end of the extension rod away from the transmission shaft is fixedly connected with a pressing round head, and the front side of the upper end of the U-shaped support plate is also fixedly mounted with an arc-shaped electric slide rail arranged on one side of the mounting circular shell, one end of the slider in the arc-shaped electric slide rail is fixedly connected with a deflection rod, one end of the deflection rod extends into the mounting circular shell through an arc-shaped opening opened in the side wall of the mounting circular shell, and a confirmation switch corresponding to the position of the pressing round head is fixedly mounted, and the outer wall of the U-shaped support plate is also fixedly mounted with a bending scale plate located on one side of the arc-shaped electric slide rail, and the rear end of the deflection rod is fixedly mounted with an identification pointer corresponding to the position of the bending scale plate.

[0021] In the above-mentioned new energy vehicle circuit board pre-inspection test bench, the base support measurement mechanism includes a plurality of electric lifting rods symmetrically fixedly installed on the upper end of the base, and the upper movable ends of the plurality of electric lifting rods are fixedly connected to the same base support plate, and a pressure sensing plate is embedded in the middle position of the upper end of the base support plate, and two laser rangefinders are also symmetrically nested on the upper end of the base support plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] By means of the bidirectional moving mechanism, pressurized bending mechanism, clamping and locking mechanism, board thickness detection feedback mechanism and bending degree confirmation mechanism, the circuit board can be quickly positioned and placed, avoiding the problem of displacement deviation of the circuit board in the process of force bending, thereby affecting the accuracy of the test results, and the circuit board can be quickly pressurized and bent to a preset curvature. In the process of pressurized bending, the bending change of the circuit board is automatically matched to automatically adjust the distance between the two ends and the bending inclination of the circuit board, avoiding the problem of additional force due to the fixation of the end of the circuit board, thereby affecting the accuracy of the test results, and after the circuit board is bent to an appropriate degree, the limit on the end of the circuit board is quickly released, and the clamping and locking mechanism is moved away along the inclination direction of the end of the circuit board after bending, avoiding the problem of the accuracy of the reset change of the circuit board affected by the force applied to the circuit board by the clamping frame when the limit on the end of the circuit board is released, so that the detection of the toughness strength of the circuit board is more accurate.

[0024] Through the temperature control auxiliary mechanism and board thickness detection feedback mechanism, the circuit board can be regulated at different test temperatures, and the temperature control time can be automatically adjusted based on the thickness of the circuit board. The thicker the circuit board, the longer the temperature control time, ensuring that the internal and external parts of the circuit board fully reach the test temperature, making the test results more accurate.

[0025] The bottom support measuring mechanism can cooperate with the pressurized bending mechanism to quickly fix the bent circuit board, provide a supporting environment for the circuit board, so that the circuit board can naturally complete the reset deformation, and quickly detect the final reset deformation degree of the circuit board to judge the toughness strength of the circuit board. The operation is convenient and fast, and the detection accuracy is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view structural schematic diagram of the present invention;

[0027] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ;

[0028] Figure 3 It is a three-dimensional structural schematic diagram of the pressurized bending mechanism of the present invention;

[0029] Figure 4 It is a three-dimensional structural schematic diagram of the temperature control auxiliary mechanism of the present invention;

[0030] Figure 5 It is a schematic diagram of the top view of the clamping and locking mechanism of the present invention;

[0031] Figure 6 yes Figure 5 A schematic diagram of the front cross-sectional structure of the middle clamping frame;

[0032] Figure 7 yes Figure 6 A magnified view of part A;

[0033] Figure 8 It is a schematic cross-sectional structure diagram of the plate thickness detection feedback mechanism of the present invention;

[0034] Fig. 9 It is a schematic cross-sectional view of the bending degree confirmation mechanism of the present invention;

[0035] Fig.10 It is a schematic cross-sectional structural diagram of the base measuring mechanism of the present invention.

[0036] In the figure: 1 base, 2 bidirectional moving mechanism, 21 side plate, 22 dual-axis motor, 23 rotating screw, 24 moving seat, 25 U-shaped support plate, 3 pressurizing bending mechanism, 31 L-shaped vertical plate, 32 electric push rod, 33 lifting plate, 34 pressurizing plate, 4 temperature control auxiliary mechanism, 41 electric push-pull rod, 42 U-shaped temperature control plate, 43 electric heating rod, 5 clamping and locking mechanism, 51 clamping frame, 52 transmission shaft, 53 electric telescopic rod, 54 connecting permanent magnet plate, 55 insulating tube, 56 connecting electromagnetic plate, 57 fixing tube, 58 pushing rod, 59 crimping plate, 510 pushing plate, 511 return spring, 512 positioning electromagnetic block, 513 positioning permanent magnet strip, 6 plate thickness detection feedback mechanism, 61 feedback shell, 62 feedback resistor rod, 63 feedback conductive contact piece, 7 bending degree confirmation mechanism, 71 installation round shell, 72 extension rod, 73 pressing round head, 74 arc-shaped electric slide rail, 75 deflection rod, 76 arc-shaped opening, 77 confirmation switch, 78 bending scale plate, 79 identification pointer, 8 bottom support measurement mechanism, 81 electric lifting rod, 82 bottom support plate, 83 pressure sensing plate, 84 laser rangefinder, 9 PLC controller. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] like Figure 1-Figure 10 As shown, a new energy vehicle circuit board pre-test test bench includes a base 1 and also includes:

[0039] The bidirectional movable mechanism 2 is fixedly mounted on the upper end of the base 1. The bidirectional movable mechanism 2 includes two side plates 21 symmetrically fixedly mounted on the upper end of the base 1. A dual-axis motor 22 is fixedly mounted at the middle position of the upper end of the base 1. The output ends of both ends of the dual-axis motor 22 are fixedly connected with rotating screws 23. The end of the rotating screw 23 away from the dual-axis motor 22 is rotatably connected to the side wall of the side plate 21 through a bearing. The rod wall of the rotating screw 23 is threadedly sleeved with a moving seat 24. The upper end of the moving seat 24 is fixedly connected with a U-shaped support plate 25.

[0040] The pressurized bending mechanism 3 is fixedly mounted on the rear side of the upper end of the base 1. The pressurized bending mechanism 3 includes an L-shaped vertical plate 31 fixedly mounted on the upper end of the base 1. Two electric push rods 32 are symmetrically fixedly inserted in the horizontal part of the L-shaped vertical plate 31. The lower moving ends of the two electric push rods 32 are fixedly connected to the same lifting plate 33. A pressurized plate 34 is fixedly mounted on the lower end of the lifting plate 33.

[0041] The temperature control auxiliary mechanism 4 is fixedly mounted on the pressurized bending mechanism 3. The temperature control auxiliary mechanism 4 includes two electric push-pull rods 41 symmetrically fixedly inserted into the side walls of the vertical part of the L-shaped vertical plate 31. The front movable ends of the two electric push-pull rods 41 are fixedly connected to the same U-shaped temperature control plate 42. A plurality of electric heating rods 43 arranged side by side are installed on the upper and lower sides of the inner wall of the U-shaped temperature control plate 42.

[0042] Two sets of clamping and locking mechanisms 5 are symmetrically fixedly installed on the moving end of the two-way moving mechanism 2. The clamping and locking mechanism 5 includes a clamping frame 51 arranged on the inner side of the upper end of the U-shaped support plate 25. The inner side of the upper end of the U-shaped support plate 25 is rotatably connected to two symmetrically arranged electric telescopic rods 53 through a transmission shaft 52. The moving ends of the two electric telescopic rods 53 are fixedly connected to the outer wall of the clamping frame 51. The rear end of the transmission shaft 52 located at the rear side penetrates and extends out of the U-shaped support plate 25, and is fixedly connected to a connecting permanent magnet plate 54. An insulating cylinder 55 covering the outer side of the connecting permanent magnet plate 54 is fixedly installed on the rear side of the upper end of the U-shaped support plate 25. The inner wall of the insulating cylinder 55 A connecting electromagnetic plate 56 is fixedly installed and is in contact with the connecting permanent magnetic plate 54. A plurality of fixed cylinders 57 are symmetrically fixedly inserted at the upper end of the clamping frame 51. A pushing rod 58 is movably inserted in the fixed cylinder 57. The lower ends of the plurality of pushing rods 58 are fixedly connected with the same crimping plate 59. The upper ends of the plurality of pushing rods 58 are fixedly connected with the same pushing plate 510. The lower end of the pushing plate 510 and the upper end of the clamping frame 51 are fixedly connected with a plurality of return springs 511 sleeved on the outside of the pushing rod 58. A positioning electromagnetic block 512 is embedded in the fixed cylinder 57. A positioning permanent magnetic strip 513 in contact with the positioning electromagnetic block 512 is embedded in the rod wall of the pushing rod 58.

[0043] The plate thickness detection feedback mechanism 6 is fixedly mounted on the upper end of one of the clamping and locking mechanisms 5. The plate thickness detection feedback mechanism 6 includes a feedback shell 61 fixedly mounted on the upper end of the clamping frame 51. A feedback resistor rod 62 arranged parallel to the pushing rod 58 is fixedly mounted on the inner wall of the feedback shell 61. A feedback conductive contact 63 is fixedly mounted on one side of the pushing plate 510. The feedback conductive contact 63 extends into the feedback shell 61 through a strip opening provided on the side wall of the feedback shell 61 and is in electrical contact with the feedback resistor rod 62.

[0044] The bending degree confirmation mechanism 7 is fixedly installed on the front side of the two-way moving mechanism 2 and is transmission-connected with the clamping and locking mechanism 5. The bending degree confirmation mechanism 7 includes a mounting round shell 71 fixedly installed on the front side of the upper end of the U-shaped support plate 25. The front end of the transmission shaft 52 extends through the U-shaped support plate 25 and is fixedly connected with an extension rod 72. The end of the extension rod 72 away from the transmission shaft 52 is fixedly connected with a pressing round head 73. The upper front side of the U-shaped support plate 25 is also fixedly installed with a mounting round shell 71 on one side. The arc-shaped electric slide rail 74 has one end of a slider in the arc-shaped electric slide rail 74 fixedly connected to a deflection rod 75, one end of the deflection rod 75 extends into the mounting round shell 71 through an arc-shaped opening 76 provided on the side wall of the mounting round shell 71, and is fixedly provided with a confirmation switch 77 corresponding to the position of the pressing round head 73. The outer wall of the U-shaped support plate 25 is also fixedly provided with a curved scale plate 78 located on one side of the arc-shaped electric slide rail 74, and the rear end of the deflection rod 75 is fixedly provided with an identification pointer 79 corresponding to the position of the curved scale plate 78.

[0045] The bottom support measuring mechanism 8 is fixedly mounted on the upper end of the base 1 and is arranged opposite to the output end of the pressurized bending mechanism 3. The bottom support measuring mechanism 8 includes a plurality of electric lifting rods 81 symmetrically fixedly mounted on the upper end of the base 1. The upper movable ends of the plurality of electric lifting rods 81 are fixedly connected to the same bottom support plate 82. A pressure sensing plate 83 is embedded in the middle position of the upper end of the bottom support plate 82. Two laser rangefinders 84 are also symmetrically nested at the upper end of the bottom support plate 82.

[0046] The PLC controller 9 is fixedly mounted on the side wall of the pressurized bending mechanism 3, and is electrically connected to the bidirectional moving mechanism 2, the pressurized bending mechanism 3, the temperature control auxiliary mechanism 4, the clamping and locking mechanism 5, the plate thickness detection feedback mechanism 6, the bending degree confirmation mechanism 7 and the bottom support measurement mechanism 8 respectively.

[0047] The operating principle of the present invention is now described as follows: the circuit board to be tested is placed between the two clamping frames 51, and the action of the dual-axis motor 22 is controlled by the PLC controller 9. The dual-axis motor 22 drives the two rotating screws 23 to rotate synchronously, and the threaded sleeve effect of the rotating screw 23 and the movable seat 24 makes the movable seat 24 drive the two U-shaped support plates 25 to move in the same direction, so that the two clamping frames 51 are close to each other, and the two clamping frames 51 are clamped outside the circuit board to achieve relative fixation of the circuit board. It is also explained that, at the beginning, the PLC controller 9 controls the power supply equipment to supply power to the connecting electromagnetic plate 56, and the connecting electromagnetic plate 56 is energized to generate a magnetism opposite to that of the connecting permanent magnetic plate 54, so that the connecting electromagnetic plate 56 and the connecting permanent magnetic plate 54 are stably adsorbed together, and then the clamping frame 51 is limited and locked by the transmission shaft 52, so that the clamping frame 51 remains in a horizontal state;

[0048] After the circuit board is relatively fixed, the staff manually presses the pushing plate 510, and the pushing plate 510 cooperates with the pushing rod 58 to overcome the elastic force of the reset spring 511 to push the crimping plate 59 downward, so that the crimping plate 59 is pressed and fixed on the circuit board. At this time, the PLC controller 9 controls the power supply equipment to supply power to the positioning electromagnetic block 512, and the positioning electromagnetic block 512 is energized to generate a magnetic field opposite to the positioning permanent magnetic strip 513, so that the fixed cylinder 57 limits and locks the pushing rod 58, so that the crimping plate 59 is always pressed on the upper side of the circuit board to limit the circuit board, and in the process of the pushing plate 510 moving downward, the feedback conductive contact 63 is driven to slide synchronously on the feedback resistor rod 62. Specifically, the greater the thickness of the circuit board, the smaller the distance the pushing plate 510 moves downward, so that the feedback conductive contact 63 slides on the feedback resistor rod 62. The shorter the sliding distance of the feedback conductive contact 63 on the feedback resistor rod 62, the smaller the access resistance of the feedback resistor rod 62.

[0049] The PLC controller 9 controls the electric push rod 32 to push the pressure plate 34 downward until the lower end of the pressure plate 34 contacts the upper surface of the circuit board. At this time, as the electric push rod 32 pushes the pressure plate 34 to continue to move downward, the PLC controller 9 controls the dual-axis motor 22 to move synchronously. The pressure plate 34 acts on the pressure point on the upper side of the circuit board to bend the circuit board. The dual-axis motor 22 drives the rotating screw 23 to rotate. The threaded sleeve of the rotating screw 23 and the moving seat 24 drives the U-shaped support plate 25 to move, thereby bringing the two ends of the circuit board closer to each other, automatically compensating for the bending of the circuit board. The change in the distance between the two ends of the circuit board avoids the problem that the clamping force of the clamping frame 51 on the end of the circuit board affects the stable bending change of the circuit board. While the circuit board is bending, the PLC controller 9 controls the power supply device to cut off the power supply to the connecting electromagnetic plate 56, thereby releasing the limit lock of the clamping frame 51, so that the clamping frame 51 can deflect with the transmission shaft 52 as the center of the circle, thereby compensating for the change in the inclination degree of the end of the circuit board caused by the bending of the circuit board, avoiding the problem that the bending work of the circuit board is affected by the force on the end of the circuit board, and ensuring the accuracy of the bending toughness strength test of the circuit board;

[0050] The feedback conductive contact 63 and the feedback resistor rod 62 are connected in series to the power supply circuit of the electric push rod 32 and the dual-axis motor 22. The electric push rod 32 and the dual-axis motor 22 are DC electric devices. When the access resistance of the feedback resistor rod 62 is smaller due to the thicker circuit board, the power supply current of the electric push rod 32 and the dual-axis motor 22 is larger, and the loading speed of the bending change of the circuit board is faster. Thicker circuit boards are relatively difficult to bend and require greater force to achieve a fixed curvature. A faster loading speed can improve the detection efficiency. Thinner circuit boards are more susceptible to local stress concentration when bending. The loading speed is set slower accordingly to avoid the problem that too fast loading speed will cause premature cracks or fractures in the circuit board, and the overall toughness of the circuit board cannot be accurately evaluated.

[0051] As the circuit board is continuously pressurized and bent, the inclination of the clamping frame 51 is constantly changing. When the clamping frame 51 rotates, the extension rod 72 and the pressing round head 73 are driven to continuously deflect through the transmission shaft 52 until the pressing round head 73 presses on the confirmation switch 77, indicating that the circuit board is bent in place. At this time, the PLC controller 9 receives the feedback signal of the confirmation switch 77, controls the electric push rod 32 and the dual-axis motor 22 to stop the action, and confirms that the initial position of the switch 77 is set according to the degree of bending of the circuit board as required. The deflection rod 75 is driven by the arc-shaped electric slide rail 74 to drive the confirmation switch 77 to move, and the position of the confirmation switch 77 is adjusted, and the setting position of the confirmation switch 77 is confirmed according to the position of the identification pointer 79 relative to the bending scale plate 78;

[0052] The PLC controller 9 then controls the electric lifting rod 81 to push the bottom support plate 82 upward, so that the bottom support plate 82 is supported on the lower side of the circuit board, and cooperates with the pressure plate 34 to achieve fixed limit of the circuit board. At this time, the PLC controller 9 controls the power supply equipment to supply power to the connection electromagnetic plate 56, and the clamping frame 51 after the current tilt change is limited and fixed again. The PLC controller 9 then controls the electric telescopic rod 53 to push the clamping frame 51 to move, so that the clamping frame 51 is free from the limit lock on the end of the circuit board, and the clamping frame 51 leaves the locked position of the circuit board along the tangent direction of the end of the circuit board, so as to avoid the clamping frame 51 from affecting the end of the circuit board when it moves. Force, thereby affecting the subsequent natural reset effect of the circuit board. After the clamping frame 51 leaves the end of the circuit board, the circuit board is reset and deformed under the action of the circuit board's toughness. After the circuit board is reset to the best state, the PLC controller 9 controls the laser rangefinder 84 to work. The laser rangefinder 84 detects the distance between the bottom support plate 82 and the circuit board, and feeds the detection information back to the PLC controller 9 for data analysis and processing. Specifically, the larger the distance detected by the laser rangefinder 84, the worse the reset effect of the circuit board and the worse the toughness strength of the circuit board. On the contrary, the smaller the detection distance of the laser rangefinder 84, the better the toughness strength of the circuit board.

[0053] Before the bending toughness strength test of the circuit board is carried out, the temperature control auxiliary mechanism 4 can be started according to the ambient temperature to be tested. The PLC controller 9 controls the electric push-pull rod 41 to push the U-shaped temperature control plate 42 to move, so that the U-shaped temperature control plate 42 is set on the outside of the circuit board. The PLC controller 9 then controls the electric heating rod 43 to start, and heats the circuit board to the required test temperature. Because the thickness of the circuit board is larger, the access resistance of the feedback resistor rod 62 is smaller. The PLC controller 9 receives the access resistance signal of the feedback conductive contact 63 and the feedback resistor rod 62. The PLC controller 9 controls the electric heating rod 43 to work for a longer time to ensure that the inner and outer parts of the circuit board stably reach the required test temperature. The test high temperature is set in the range of 60-85°C to simulate the ambient temperature that the circuit board of the new energy vehicle will be subjected to during operation, so as to make the toughness strength test of the circuit board more comprehensive and accurate.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A new energy vehicle circuit board pre-test test bench, comprising a base (1), characterized in that: Also includes: A bidirectional moving mechanism (2) is fixedly mounted on the upper end of the base (1); A pressurized bending mechanism (3) is fixedly mounted on the rear side of the upper end of the base (1); A temperature control auxiliary mechanism (4) fixedly mounted on the pressurizing and bending mechanism (3); Two sets of clamping and locking mechanisms (5) are symmetrically fixedly mounted on the moving ends of the bidirectional moving mechanism (2); A plate thickness detection feedback mechanism (6) is fixedly mounted on the upper end of one set of the clamping and locking mechanisms (5); A bending degree confirmation mechanism (7) is fixedly mounted on the front side of the bidirectional moving mechanism (2) and is transmission-connected to the clamping and locking mechanism (5); A bottom support measuring mechanism (8) is fixedly mounted on the upper end of the base (1) and is arranged opposite to the output end of the pressurizing bending mechanism (3); A PLC controller (9) is fixedly mounted on a side wall of the pressurized bending mechanism (3), and is electrically connected to the bidirectional moving mechanism (2), the pressurized bending mechanism (3), the temperature control auxiliary mechanism (4), the clamping and locking mechanism (5), the plate thickness detection feedback mechanism (6), the bending degree confirmation mechanism (7), and the bottom support measurement mechanism (8); The bidirectional moving mechanism (2) comprises two side plates (21) symmetrically fixedly mounted on the upper end of the base (1); a dual-axis motor (22) is fixedly mounted at the middle position of the upper end of the base (1); both output ends of the dual-axis motor (22) are fixedly connected to a rotating screw (23); one end of the rotating screw (23) away from the dual-axis motor (22) is rotatably connected to the side wall of the side plate (21) via a bearing; a moving seat (24) is threadedly sleeved on the rod wall of the rotating screw (23); and a U-shaped support plate (25) is fixedly connected to the upper end of the moving seat (24); The clamping and locking mechanism (5) comprises a clamping frame (51) arranged on the inner side of the upper end of the U-shaped support plate (25); the inner side of the upper end of the U-shaped support plate (25) is rotatably connected to two symmetrically arranged electric telescopic rods (53) via a transmission shaft (52); the movable ends of the two electric telescopic rods (53) are fixedly connected to the outer wall of the clamping frame (51); the rear end of the transmission shaft (52) located at the rear side penetrates and extends out of the U-shaped support plate (25) and is fixedly connected to a connecting permanent magnet plate (54); an insulating cylinder (55) covering the outside of the connecting permanent magnet plate (54) is fixedly installed on the rear side of the upper end of the U-shaped support plate (25); and a contact member (54) in contact with the connecting permanent magnet plate (54) is fixedly installed on the inner wall of the insulating cylinder (55). A connecting electromagnetic plate (56) is provided, the upper end of the clamping frame (51) is symmetrically fixed with a plurality of fixed cylinders (57), the fixed cylinder (57) is movably inserted with a pushing rod (58), the lower ends of the plurality of pushing rods (58) are fixedly connected to the same crimping plate (59), the upper ends of the plurality of pushing rods (58) are fixedly connected to the same pushing plate (510), the lower end of the pushing plate (510) and the upper end of the clamping frame (51) are fixedly connected with a plurality of return springs (511) sleeved outside the pushing rods (58), a positioning electromagnetic block (512) is embedded in the fixed cylinder (57), and the rod wall of the pushing rod (58) is embedded with a positioning permanent magnetic strip (513) in contact with the positioning electromagnetic block (512); The plate thickness detection feedback mechanism (6) comprises a feedback shell (61) fixedly mounted on the upper end of the clamping frame (51); a feedback resistor rod (62) arranged parallel to the squeezing and pushing rod (58) is fixedly mounted on the inner wall of the feedback shell (61); a feedback conductive contact piece (63) is fixedly mounted on one side of the squeezing and pushing plate (510); the feedback conductive contact piece (63) extends into the feedback shell (61) through a strip-shaped opening provided on the side wall of the feedback shell (61) and is in electrical contact with the feedback resistor rod (62); The bending degree confirmation mechanism (7) comprises a mounting round shell (71) fixedly mounted on the front side of the upper end of the U-shaped support plate (25); the front end of the transmission shaft (52) extends through the U-shaped support plate (25) and is fixedly connected to an extension rod (72); the end of the extension rod (72) away from the transmission shaft (52) is fixedly connected to a pressing round head (73); the upper front end of the U-shaped support plate (25) is also fixedly mounted with an arc-shaped electric slide rail (74) arranged on one side of the mounting round shell (71); the arc-shaped electric slide rail (74) is fixedly mounted on the front side of the upper end of the U-shaped support plate (25 ... 4) A deflection rod (75) is fixedly connected to one end of the inner slide, one end of the deflection rod (75) extends into the mounting round shell (71) through an arc-shaped opening (76) provided on the side wall of the mounting round shell (71), and a confirmation switch (77) corresponding to the position of the pressing round head (73) is fixedly installed, and a curved scale plate (78) located on one side of the curved electric slide rail (74) is fixedly installed on the outer wall of the U-shaped support plate (25), and an identification pointer (79) corresponding to the position of the curved scale plate (78) is fixedly installed on the rear end of the deflection rod (75); The bottom support measuring mechanism (8) comprises a plurality of electric lifting rods (81) symmetrically fixedly mounted on the upper end of the base (1); the upper movable ends of the plurality of electric lifting rods (81) are fixedly connected to the same bottom support plate (82); a pressure sensing plate (83) is embedded in the middle position of the upper end of the bottom support plate (82); and two laser rangefinders (84) are symmetrically embedded in the upper end of the bottom support plate (82).

2. A new energy vehicle circuit board pre-test test bench according to claim 1, characterized in that: The pressurized bending mechanism (3) comprises an L-shaped vertical plate (31) fixedly mounted on the upper end of the base (1); two electric push rods (32) are symmetrically fixedly inserted into the horizontal portion of the L-shaped vertical plate (31); the lower movable ends of the two electric push rods (32) are fixedly connected to the same lifting plate (33); and a pressurized plate (34) is fixedly mounted on the lower end of the lifting plate (33).

3. A new energy vehicle circuit board pre-test test bench according to claim 2, characterized in that: The temperature control auxiliary mechanism (4) comprises two electric push-pull rods (41) symmetrically fixedly inserted into the side walls of the vertical portion of the L-shaped vertical plate (31), the front movable ends of the two electric push-pull rods (41) being fixedly connected to the same U-shaped temperature control plate (42), and a plurality of electric heating rods (43) arranged side by side are installed on the upper and lower sides of the inner wall of the U-shaped temperature control plate (42).

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