Circuit board testing device

Abstract

The invention relates to the field of circuit board devices, in particular to a circuit board testing device which comprises a rack, a panel is fixed to the rack, a plurality of positioning grooves penetrating through the panel are evenly formed in the panel, a sliding table is arranged below the panel, and limiting grooves are formed in the positions, corresponding to the positioning grooves, of the sliding table. Positioning columns are arranged at the positions, corresponding to the positioning grooves, of the panel, penetrate through the positioning grooves and are in sliding connection with the positioning grooves, threaded columns are fixed to the bottoms of the positioning columns, penetrate through the limiting grooves and are in sliding connection with the limiting grooves, and nuts in threaded connection with the threaded columns are arranged on the threaded columns below the sliding tables. A positioning lead screw and a positioning sliding rod are further arranged on the portion, below the panel, of the rack, the positioning lead screw is driven by a positioning motor to rotate, sliding plates are arranged on the positioning lead screw and the positioning sliding rod, and the positioning lead screw penetrates through the sliding plates and is in threaded connection with the sliding plates. The bending test of the circuit board can be realized through the device.

Description

Technical Field

[0001] The present invention relates to the field of circuit board devices, and in particular to a circuit board testing device. Background Art

[0002] In today's modern electronic product manufacturing, printed circuit boards are an indispensable component. Surface mounting and through-hole mounting of electronic packages have become the main ways to package high-density electronic devices, but they also bring challenges to mechanical reliability. The use of high-density component packaging and complex layouts may cause PCBs to be subjected to mechanical and thermal stresses during assembly, thereby increasing the risk of failure. Therefore, it is particularly important to understand the mechanical reliability of finished PCBs. Mechanical reliability testing of finished PCBs usually includes bending strength testing: the circuit board is usually bent to a certain angle and maintained for a certain period of time, and then the recovery state of the circuit board is confirmed.

[0003] Patent application number: CN201921591584.9 discloses a circuit board solder joint bending stress test device, which clamps the circuit board through two clamping mechanisms to keep the circuit board horizontal and prevent creeping; during the test, since one of the clamping mechanisms is fixed and the other clamping mechanism is connected to the power mechanism, when force is applied to the clamping mechanism, since one side of the power mechanism is fixed on the base, it will move toward the side connected to the clamping mechanism when it is extended, so as to drive the clamping mechanism to slide toward the other clamping mechanism, thereby causing the circuit board to bend and deform. However, this type of test device bends the circuit board by applying force at three points, and cannot make the circuit board form an arc surface for testing the circuit board, resulting in inaccurate test results.

[0004] The present invention is proposed in view of the deficiencies in the prior art. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a circuit board testing device.

[0006] The present invention can be implemented by the following technical solutions:

[0007] The invention discloses a circuit board testing device, comprising a frame, a panel is fixed on the frame, a plurality of positioning grooves penetrating the panel are evenly arranged on the panel, a slide is arranged below the panel, limiting grooves are arranged at positions corresponding to the positioning grooves on the slide, positioning posts are arranged at positions corresponding to the positioning grooves on the panel, the positioning posts pass through the positioning grooves and are slidably connected to the positioning grooves, threaded posts are fixed at the bottom of the positioning posts, the threaded posts pass through the limiting grooves and are slidably connected to the limiting grooves, nuts threadedly connected to the threaded posts are arranged on the threaded posts below the slide, a positioning screw and a positioning slide rod are also arranged on the frame below the panel, the positioning screw rod is driven to rotate by a positioning motor, and sliding The plate, the positioning screw passes through the slide plate and is threadedly connected to the slide plate, a limit screw is also arranged between the two slide plates, the limit screw is driven to rotate by a limit motor, a slider is also arranged between the two slide plates, the limit screw passes through the slider and is threadedly connected to the slider, a lifting cylinder is also fixed on the slider, a mounting plate is fixed to the end of the piston rod of the lifting cylinder, a fastening motor is fixed to the mounting plate, a rotating block used in conjunction with a nut is fixed to the output end of the fastening motor, a fixing column is also fixed on the panel, a limit column is also arranged on the panel, the limit column is driven to rotate by a winding motor, a limit cloth is also arranged above the panel, one end of the limit cloth is fixed to the fixing column, and the other end of the limit cloth is fixed to the limit column.The position of each positioning column is adjusted according to the test requirements of the circuit board, and the positioning motor drives the positioning screw to rotate, the slide plate moves in the direction of the positioning screw, and the slider moves with the slide plate, that is, the lateral movement of the rotating block can be realized, and the limiting motor drives the limiting screw to rotate, and the slider moves in the direction of the limiting screw, that is, the longitudinal movement of the rotating block can be realized. The lateral and longitudinal movements of the rotating block can realize the rotating block to reach any position below the panel. When the position of the positioning column is adjusted, after the rotating block reaches below the corresponding positioning column, the lifting cylinder is started, the mounting plate rises, the rotating block rises, and the nut at the corresponding position enters the inside of the rotating block. The rotating block is driven to rotate by the tightening motor, and the nut moves on the threaded column. The positioning column rises a certain distance, the positioning column is separated from the slide, and the rotating block is moved to the specified position again. The nut moves with the rotating block, and the positioning column moves to the specified position with the nut. The tightening motor drives the rotating block to rotate in the opposite direction again, and the positioning column descends. The positioning column is fixed after the bottom of the positioning column is squeezed with the slide. After the positioning column is fixed, the lifting cylinder is started , the piston rod on the lifting cylinder is shortened, the rotating block is separated from the nut, and the cycle operation is carried out to move each positioning column to the specified position. The axis of the positioning column is on an arc surface, and the length of the limiting cloth between the fixed column and the limiting column is adjusted according to the bending arc of the circuit board during the test. The limiting column is driven to rotate by the winding motor to rewind part of the limiting cloth, and the circuit board to be tested is placed on the panel. The test cylinder is started, the piston rod on the test cylinder is shortened, the slide moves, and each positioning column moves with the slide. The positioning column pushes the circuit board to move close to the limiting cloth. After the limiting cloth is tightened, the circuit board is fixed in an arc shape between the limiting cloth and the positioning column. After a period of time, the test cylinder is started again, the slide moves, the positioning column moves, the positioning column is separated from the circuit board, and the circuit board is removed to confirm whether the circuit board is deformed. The bending test of the circuit board can be realized by this device, and the test of different bending degrees of the circuit board can be realized by adjusting the position of each positioning column and the state of the limiting cloth, and the arc surface support of the circuit board is formed by multiple positioning columns to ensure the accuracy of the test.

[0008] Preferably, a limiting sliding rod is further provided between the two sliding plates, and the limiting sliding rod passes through the sliding block and is slidably connected to the sliding block.

[0009] Preferably, a guide post is fixed on the panel between the limiting post and the fixed post, and the limiting cloth bypasses the guide post. By bypassing the guide post with the limiting cloth, it can be avoided that the arc surface formed by the limiting cloth is inconsistent with the arc surface formed by the positioning post when the circuit board is tested after the limiting post is wound around the limiting cloth of a certain diameter.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] The device can realize the bending test of the circuit board, and the test of different bending degrees of the circuit board can be realized by adjusting the position of each positioning column and the state of the limiting cloth, and the arc surface support of the circuit board is formed by multiple positioning columns to ensure the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 It is another structural schematic diagram of the present invention from another angle;

[0015] In the figure: 1, frame; 2, panel; 3, positioning slot; 4, slide; 5, limit slot; 6, test cylinder; 7, positioning column; 8, threaded column; 9, nut; 10, positioning screw rod; 11, positioning slide bar; 12, slide plate; 13, positioning motor; 14, limit screw rod; 15, limit slide bar; 16, limit motor; 17, slide block; 18, lifting cylinder; 19, mounting plate; 20, fastening motor; 21, rotating block; 22, fixing column; 23, guide column; 24, limit column; 25, limit cloth; 26, winding motor; DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0017] Embodiment 1:

[0018] like Figure 1 to Figure 2As shown, the present embodiment discloses a circuit board testing device, comprising a frame 1, a panel 2 is fixed on the frame 1, a plurality of positioning grooves 3 penetrating the panel 2 are evenly arranged on the panel 2, a slide 4 is arranged below the panel 2, limiting grooves 5 are arranged on the slide 4 at positions corresponding to the positioning grooves 3, positioning columns 7 are arranged on the panel 2 at positions corresponding to the positioning grooves 3, the positioning columns 7 pass through the positioning grooves 3 and are slidably connected to the positioning grooves 3, threaded columns 8 are fixed to the bottom of the positioning columns 7, the threaded columns 8 pass through the limiting grooves 5 and are slidably connected to the limiting grooves 5, nuts 9 threadedly connected to the threaded columns 8 are arranged on the threaded columns 8 below the slide 4, a positioning screw 10 and a positioning slide 11 are also arranged on the frame 1 below the panel 2, the positioning screw 10 is driven to rotate by a positioning motor 13, a slide plate 12 is arranged on the positioning screw 10 and the positioning slide 11, and the positioning screw 1 0 passes through the slide plate 12 at the corresponding position and is threadedly connected with the slide plate 12. A limit screw rod 14 is also arranged between the two slide plates 12. The limit screw rod 14 is driven to rotate by a limit motor 16. A slider 17 is also arranged between the two slide plates 12. The limit screw rod 14 passes through the slider 17 and is threadedly connected to the slider 17. A lifting cylinder 18 is also fixed on the slider 17. A mounting plate 19 is fixed to the end of the piston rod of the lifting cylinder 18. A fastening motor 20 is fixed to the mounting plate 19. A rotating block 21 used in conjunction with a nut 9 is fixed to the output end of the fastening motor 20. A fixing column 22 is also fixed on the panel 2. A limit column 24 is also arranged on the panel 2. The limit column 24 is driven to rotate by a winding motor 26. A limit cloth 25 is also arranged above the panel 2. One end of the limit cloth 25 is fixed to the fixing column 22, and the other end of the limit cloth 25 is fixed to the limit column 24.The positions of the positioning posts 7 are adjusted according to the test requirements of the circuit board. The positioning screw 10 is driven to rotate by the positioning motor 13, and the slide 12 moves in the direction of the positioning screw 10. The slider 17 moves with the slider 12, that is, the lateral movement of the rotating block 21 can be realized. The limiting motor 16 drives the limiting screw 14 to rotate, and the slider 17 moves in the direction of the limiting screw 14, that is, the longitudinal movement of the rotating block 21 can be realized. The lateral movement and longitudinal movement of the rotating block 21 can realize the rotating block 21 to reach any position below the panel 2. When the position of the positioning post 7 is adjusted, the rotating block 21 reaches the corresponding positioning post 7. After the screw is lowered, the lifting cylinder 18 is started, the mounting plate 19 rises, the rotating block 21 rises, the nut 9 at the corresponding position enters the rotating block 21, and the rotating block 21 is driven to rotate by the tightening motor 20. The nut 9 moves on the threaded column 8, the positioning column 7 rises a certain distance, the positioning column 7 is separated from the slide 4, and the rotating block 21 is moved to the specified position again. The nut 9 moves with the rotating block 21, and the positioning column 7 moves with the nut 9 to the specified position. The tightening motor 20 drives the rotating block 21 to rotate in the opposite direction again, and the positioning column 7 descends. The bottom of the positioning column 7 is squeezed with the slide 4 to fix the positioning column 7. After the positioning column 7 is fixed, the lifting cylinder 18 is started, the piston rod on the lifting cylinder 18 is shortened, the rotating block 21 is separated from the nut 9, and the operation is cyclical, so that each positioning column 7 is moved to the specified position, the axis of the positioning column 7 is on an arc surface, and the length of the limiting cloth 25 between the fixed column 22 and the limiting column 24 is adjusted according to the bending curvature of the circuit board during the test, the limiting column 24 is driven to rotate by the winding motor 26, and part of the limiting cloth 25 is wound up, and the circuit board to be tested is placed on the panel 2, the test cylinder 6 is started, the piston rod on the test cylinder 6 is shortened, the slide 4 moves, and each positioning column 7 moves with the slide 4, and the circuit board to be tested is placed on the panel 2. The positioning posts 7 push the circuit board to move close to the limiting cloth 25. After the limiting cloth 25 is tightened, the circuit board is fixed in an arc shape between the limiting cloth 25 and the positioning posts 7. After a period of time, the test cylinder 6 is started again, the slide 4 moves, the positioning posts 7 move, the positioning posts 7 are separated from the circuit board, and the circuit board is removed to confirm whether the circuit board is deformed. The device can realize a bending test of the circuit board, and the circuit board can be tested with different bending degrees by adjusting the position of each positioning post 7 and the state of the limiting cloth 25. The arc surface of the circuit board is supported by multiple positioning posts 7 to ensure the accuracy of the test.

[0019] A limiting sliding rod 15 is further arranged between the two sliding plates 12 . The limiting sliding rod 15 passes through the sliding block 17 and is slidably connected to the sliding block 17 .

[0020] Embodiment 2:

[0021] This embodiment discloses a circuit board testing device. Based on the structure and principle of the first embodiment, a guide column 23 is further fixed on the panel 2 between the limit column 24 and the fixed column 22, and the limit cloth 25 bypasses the guide column 23. By the limit cloth 25 bypassing the guide column 23, it can be avoided that the arc surface formed by the limit cloth 25 is inconsistent with the arc surface formed by the positioning column 7 when the circuit board is tested after the limit column 24 is wound around the limit cloth 25 of a certain diameter.

[0022] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, substitutions and variations should also be regarded as the scope of protection of the present invention.

Claims

1. A circuit board testing device, comprising a rack, characterized in that: A panel is fixed on the frame, and a plurality of positioning grooves penetrating the panel are evenly arranged on the panel, a slide is arranged under the panel, and limiting grooves are arranged on the slide at positions corresponding to the positioning grooves, and positioning posts are arranged on the panel at positions corresponding to the positioning grooves, and the positioning posts pass through the positioning grooves and are slidably connected to the positioning grooves, and threaded posts are fixed at the bottom of the positioning posts, and the threaded posts pass through the limiting grooves and are slidably connected to the limiting grooves, and nuts threadedly connected to the threaded posts are arranged on the threaded posts under the slide, and a positioning screw and a positioning slide rod are also arranged on the frame under the panel, and the positioning screw rod is driven to rotate by a positioning motor, and slide plates are arranged on the positioning screw rod and the positioning slide rod, and the positioning screw rod passes through The slide plate is threadedly connected to the slide plate, a limit screw rod is also arranged between the two slide plates, the limit screw rod is driven to rotate by a limit motor, a slider is also arranged between the two slide plates, the limit screw rod passes through the slider and is threadedly connected to the slider, a lifting cylinder is also fixed on the slider, a mounting plate is fixed to the end of the piston rod of the lifting cylinder, a fastening motor is fixed to the mounting plate, a rotating block used in conjunction with a nut is fixed to the output end of the fastening motor, a fixing column is also fixed on the panel, a limit column is also arranged on the panel, the limit column is driven to rotate by a winding motor, a limit cloth is also arranged above the panel, one end of the limit cloth is fixed to the fixing column, and the other end of the limit cloth is fixed to the limit column.

2. The circuit board testing device according to claim 1, characterized in that: A limiting sliding rod is also arranged between the two sliding plates, and the limiting sliding rod passes through the sliding block and is slidably connected with the sliding block.

3. The circuit board testing device according to claim 1, characterized in that: A guide column is also fixed on the panel between the limiting column and the fixing column, and the limiting cloth bypasses the guide column.

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