Circuit board detection equipment and method

Abstract

The invention discloses a circuit board detection device and method, and belongs to the field of circuit board detection. Circuit board detection equipment comprises a detection cabinet body and a control cabinet arranged above the detection cabinet body, a detection module is arranged in the control cabinet, a display screen used for displaying a circuit board detection result is arranged on the front side of the control cabinet, and the circuit board detection equipment further comprises salt mist spraying assemblies arranged on the two sides of a conveying assembly, the salt mist spraying assembly is used for performing salt mist spraying and coating on the circuit board; the collecting assembly is arranged below the conveying assembly and is used for collecting redundant salt mist; movement of the circuit board can be limited, friction between the limiting wheels and the circuit board can be avoided, and abrasion to the circuit board is prevented; during detection, friction on the line surface of the position to be detected on the circuit board is accelerated, and then contact between salt mist and a copper bar is increased so as to accelerate corrosion of the salt mist; the cam extrudes the air bag in stages, and redundant salt mist is collected in time through the air suction box.

Description

Technical Field

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

[0002] In recent years, the continuous development of information technology has led to the rapid development of circuit boards as an important part of information technology. In order to ensure that the output circuit boards are qualified products, the circuit boards need to be tested under extreme conditions during the production process, such as anti-oxidation testing. If the circuit board does not pass the anti-oxidation test, it will be easily corroded by acidic air during actual use. After that, the small copper circuits will become narrower, or even directly corroded and broken, affecting the use of the circuit board. Therefore, it is necessary to put the entire circuit board into the testing environment and conduct anti-corrosion testing on the target circuit.

[0003] In the existing testing process, the salt mist generated cannot be recovered in time, and long-term deposition will cause corrosion to other structures. Moreover, in an environment wrapped in salt mist, it is impossible to ensure that the part to be tested is in full contact with the salt mist, which affects the test results of corrosion performance. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the salt mist generated in the corrosion detection process in the prior art cannot be recovered in time, and long-term deposition will cause corrosion of other structures; and the circuit board cannot ensure that the part to be detected is fully in contact with the salt mist in an environment wrapped in salt mist, which affects the detection result of corrosion performance, and a circuit board detection device and method are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A circuit board detection device comprises a detection cabinet and a control cabinet arranged above the detection cabinet, wherein a detection module is arranged in the control cabinet, and a display screen for displaying circuit board detection results is arranged on the front side of the control cabinet. The device also comprises: a conveying component arranged in the control cabinet, wherein the conveying component is used to convey the circuit board to the bottom of the detection module; a salt mist spraying component arranged on both sides of the conveying component, wherein the salt mist spraying component is used to perform salt mist spray coating on the circuit board; and a collecting component arranged below the conveying component, wherein the collecting component is used to collect excess salt mist.

[0007] Preferably, the conveying assembly comprises a conveying platform and a conveying belt for placing circuit boards which is connected to the conveying platform, a push plate is provided on one side of the upper surface of the conveying belt, and limit frames are symmetrically provided on both sides of the conveying belt, through slots are provided in the limit frames, and limit wheels are arranged in an equidistant array in the through slots;

[0008] It also includes two groups of conveying shafts arranged on the conveying platform, and a conveyor belt is connected to each other through transmission. A synchronous pulley is installed at one end of one group of conveying shafts, and a second motor is installed at the bottom of the conveying platform, and a synchronous pulley is also fixedly installed at the output shaft end of the second motor, and the two groups of synchronous pulleys are connected through transmission.

[0009] In order to limit the circuit boards of different sizes, the limit frame is further slidably connected to the conveyor table through a linear guide rail, and a spacing adjustment component is arranged between the two groups of the limit frames. The spacing adjustment component includes a first motor, which is fixedly mounted on the lower surface of the conveyor table through a bracket, and a gear is fixedly mounted on the output shaft end of the first motor. A rack is fixedly connected to one side of the limit frame, and the two groups of racks are symmetrically arranged on both sides of the gear, and the rack and the gear are meshed.

[0010] Preferably, a liquid storage tank is provided in the detection cabinet, a first cavity and a second cavity which are interconnected are provided in the limit frame, the liquid storage tank and the first cavity are connected by a water pipe, and a valve is connected in the water pipe.

[0011] Preferably, the salt mist spray assembly includes a rotating shaft with a hollow structure and a spray pipe connected to one end of the rotating shaft, one side of the spray pipe is connected to a high-pressure nozzle, the high-pressure nozzle is arranged above the conveyor belt, the rotating shaft passes through the limiting wheel and is rotatably installed in the through groove of the limiting frame, one end of the rotating shaft extends into the second cavity and is installed with an impeller.

[0012] In order to utilize the movement of the conveyor belt to drive the piston plate to spray the salt solution in the first cavity and the second cavity onto the surface of the circuit board through the spray pipe and the high-pressure nozzle, further, the salt mist spray assembly also includes a piston plate arranged in the second cavity, the piston plate and the conveyor belt are fixedly connected, a sliding is provided on one side of the first cavity, a slider is slidably connected in the slide groove, an accordion plate is installed between the slider and the slide groove, the piston plate and the slider are fixedly connected, and a connecting plate is connected between the slider and the conveyor belt.

[0013] In order to prevent the limit frame from interfering with the connection structure between the conveyor belt and the piston plate during the process of adjusting the spacing, a telescopic assembly is further connected between the connecting plates, and the telescopic assembly includes a hollow shaft and a connecting rod with a sliding connection, and one end of the connecting rod and the hollow shaft are fixedly connected to one side of the connecting plate.

[0014] Preferably, the collection assembly comprises two groups of suction boxes connected by a connecting pipe, the suction boxes are connected to an air bag through the suction pipe, and an air inlet hole connected to the conveying platform is provided in the suction box;

[0015] It also includes a friction roller rotatably installed above the conveyor belt, with vertical plates arranged at both ends of the friction roller, an equidistant array of shaft sleeves on the surface of the friction roller, an annular equidistant array of grinding wheels inside the shaft sleeve, and the grinding wheels are rotatably connected inside the shaft sleeve.

[0016] In order to utilize the rotation of the friction roller to squeeze the slider and collect excess salt mist in time, further, cams are fixedly installed at both ends of the friction roller, a push rod is arranged on the top of the airbag, and the cam and the ball on the top of the push rod are fitted together.

[0017] A circuit board detection method comprises the following steps:

[0018] Step 1: Place the circuit board to be tested on the conveying assembly, and start the conveying assembly to move the circuit board to the bottom of the detection module;

[0019] Step 2: In the process of starting the conveying component to drive the circuit board to move, the salt spray spray component is driven to spray and coat the circuit board;

[0020] Step 3: In synchronization with step 2, the collection component collects excess salt mist in a timely manner.

[0021] Compared with the prior art, the present invention provides a circuit board detection device having the following

[0022] Beneficial effects:

[0023] 1. The circuit board detection equipment is provided with two sets of limit frames on both sides of the conveyor belt, and the limit frames are provided with limit wheels, which can rotate with the movement of the circuit board, so as to limit the movement of the circuit board and avoid friction between the limit wheels and the circuit board, thereby preventing the circuit board from being worn;

[0024] 2. The circuit board detection equipment drives the circuit board to move to the detection station by setting a conveyor belt. During the conveying process, the piston plate in the limit frame is driven to slide in the first cavity to squeeze the air and salt solution in the first cavity, so that the salt solution is sprayed into salt mist through a high-pressure nozzle to adhere to the surface of the circuit board for anti-corrosion detection;

[0025] 3. The circuit board detection equipment is provided with a friction roller with a grinding wheel, and the friction roller, the grinding wheel and the circuit board surface are rotated and rubbed. During the detection, the friction of the circuit surface of the position to be tested on the circuit board is accelerated, and then the contact between the salt spray and the copper strip is increased to accelerate the erosion of the salt spray;

[0026] 4. The circuit board detection equipment is provided with an airbag. During the rotation of the friction roller, the eccentric structure of the cam applies periodic pressure to the ejector rod. The downward movement of the ejector rod will squeeze the airbag. The one-way valve in the suction pipe can control the discharge of the inhaled gas. During the rotation of the cam, the airbag is reset, and the suction pipe will collect the excess salt spray in time through the suction box.

[0027] 5. The circuit board detection equipment is provided with a hollow rotating shaft to support the limit wheel. The limit wheel and the rotating shaft are fixedly connected. The limit wheel rotates due to the friction generated by the circuit board, which drives the impeller at the bottom of the rotating shaft to rotate, stir and mix the salt solution, ensure the uniform concentration of the salt solution, ensure the corrosion effect of the circuit board, and thus ensure the accuracy of the anti-corrosion detection structure.

[0028] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The present invention can limit the movement of the circuit board and avoid friction between the limiting wheel and the circuit board, thereby preventing wear on the circuit board; salt spray is applied to the surface of the circuit board to prepare for anti-corrosion detection; during detection, the friction of the circuit surface at the position to be tested on the circuit board is accelerated, and then the contact between the salt spray and the copper strip is increased to accelerate the erosion of the salt spray; the air bag is squeezed in stages by the cam, and the excess salt spray is collected in time by the suction box; the salt solution can also be stirred and mixed to ensure the uniform concentration of the salt solution and the corrosion effect of the circuit board, thereby ensuring the accuracy of the anti-corrosion detection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the three-dimensional structure of a circuit board detection device proposed by the present invention;

[0030] Figure 2 A schematic diagram of the three-dimensional structure of a conveying component of a circuit board detection device proposed by the present invention;

[0031] Figure 3 A schematic cross-sectional view of a limit frame of a circuit board detection device proposed by the present invention;

[0032] Figure 4 A schematic diagram of the three-dimensional structure of a telescopic component of a circuit board detection device proposed by the present invention;

[0033] Figure 5 A circuit board detection device proposed by the present invention Figure 4 The enlarged structural diagram of part A in the middle;

[0034] Figure 6 A schematic diagram of the bottom structure of a conveyor platform of a circuit board testing device proposed by the present invention;

[0035] Figure 7A schematic diagram of the three-dimensional structure of a spacing adjustment component of a circuit board detection device proposed by the present invention;

[0036] Figure 8 This is a schematic diagram of the three-dimensional structure of a collecting component of a circuit board detection device proposed by the present invention.

[0037] In the figure: 1. detection cabinet; 2. control cabinet; 3. display screen; 4. conveyor belt; 5. push plate; 6. conveyor platform; 7. conveyor shaft; 8. limit frame; 9. limit wheel; 10. first cavity; 11. piston plate; 12. second cavity; 13. rotating shaft; 14. impeller; 15. water pipe; 16. liquid storage tank; 17. valve; 18. connecting plate; 19. hollow shaft; 20. connecting rod; 21. slider; 22 , accordion plate; 23, spray pipe; 24, high-pressure nozzle; 25, friction roller; 26, bushing; 27, grinding wheel; 28, vertical plate; 29, cam; 30, push rod; 31, air bag; 32, suction pipe; 33, suction box; 34, connecting pipe; 35, bracket; 36, first motor; 37, gear; 38, rack; 39, linear guide; 40, second motor; 41, synchronous pulley; 42, air inlet. DETAILED DESCRIPTION

[0038] 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.

[0039] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] Example:

[0041] Reference Figure 1-Figure 8 A circuit board detection device includes a detection cabinet 1 and a control cabinet 2 arranged above the detection cabinet 1, a detection module is arranged in the control cabinet 2, and a display screen 3 for displaying the circuit board detection result is arranged on the front side of the control cabinet 2, wherein the detection module includes a retractable terminal ejector pin, and after the circuit board is attached by salt spray spray, the enameled circuit of the to-be-tested section in the circuit board can be electrically connected, and the anti-oxidation detection can be performed, and the detection result is displayed on the display screen 3.

[0042] It also includes a conveying assembly arranged in the control cabinet 2, the conveying assembly includes a conveying platform 6 and a conveying belt 4 for placing circuit boards and connected to the conveying platform 6, a push plate 5 is arranged on one side of the upper surface of the conveying belt 4, and a limiting frame 8 is symmetrically arranged on both sides of the conveying belt 4, a through slot is opened in the limiting frame 8, and a limiting wheel 9 is arranged in an equidistant array in the through slot;

[0043] The circuit board is placed on the conveying assembly, and the circuit board is conveyed to the bottom of the detection module. The conveying assembly includes limit frames 8 symmetrically arranged on both sides of the conveyor belt 4. A through groove is opened in the limit frame 8, and a limit wheel 9 is rotatably installed in the through groove. The limit wheel 9 is set as a floating structure. When the circuit board moves with the conveyor belt 4, the limit wheel 9 can rotate with the movement of the circuit board, which can not only limit the moving direction of the circuit board to ensure that the circuit board moves smoothly to the bottom of the detection module, but also avoid friction between the limit wheel 9 and the circuit board to prevent wear on the circuit board.

[0044] It also includes two groups of conveying shafts 7 arranged on the conveying platform 6, and the conveyor belts 4 are transmission-connected between the two groups of conveying shafts 7. A synchronous pulley 41 is installed at one end of one group of conveying shafts 7. A second motor 40 is installed at the bottom of the conveying platform 6, and a synchronous pulley 41 is also fixedly installed at the output shaft end of the second motor 40. The two groups of synchronous pulleys 41 are connected through synchronous belt transmission.

[0045] Specifically, the second motor 40 is started, and the output shaft end of the second motor 40 and one end of the conveying shaft 7 are fixedly mounted with synchronous pulleys 41, and the two sets of synchronous pulleys 41 are transmission-connected, thereby driving the conveying belt 4 to convey the circuit board.

[0046] The limit frame 8 is slidably connected to the conveyor platform 6 through a linear guide 39, and a spacing adjustment component is arranged between the two groups of limit frames 8. The spacing adjustment component includes a first motor 36, and the first motor 36 is fixedly installed on the lower surface of the conveyor platform 6 through a bracket 35. A gear 37 is fixedly installed on the output shaft end of the first motor 36. A rack 38 is fixedly connected to one side of the limit frame 8. Two groups of racks 38 are symmetrically arranged on both sides of the gear 37, and the rack 38 is meshed with the gear 37.

[0047] In this embodiment, a spacing adjustment component is provided between the two groups of limit frames 8. When the circuit board is placed on the conveyor belt 4, the infrared energy is converted into an electrical signal by the distance measuring sensor. The electrical signal of the distance measuring sensor and the first motor 36 is connected. The first motor 36 is started to drive the gear 37 to rotate. The gear 37 and the rack 38 are meshed, so that the two groups of racks 38 can be driven to move on the surface of the conveyor platform 6. Since the two groups of limit frames 8 are slidably connected to the conveyor platform 6 through the linear guide rail 39, the rack 38 drives the limit frames 8 to move and adjusts the spacing between the limit frames 8, so that the limit wheel 9 can fit and limit the circuit boards of different sizes.

[0048] It should be noted that the conveyor belt 4 only conveys the circuit board to the bottom of the detection module and does not perform a full circle of transmission.

[0049] A liquid storage tank 16 is arranged in the detection cabinet 1, and a first cavity 10 and a second cavity 12 which are interconnected are opened in the limiting frame 8. The liquid storage tank 16 and the first cavity 10 are connected through a water pipe 15, and a valve 17 is connected in the water pipe 15.

[0050] In this embodiment, a liquid storage tank 16 is provided for storing saline solution, which can be replenished in time. The liquid storage tank 16 is connected to the second cavity 12, and the first cavity 10 is also connected to the second cavity 12. The saline solution can be atomized and sprayed onto the circuit board by squeezing the air in the cavity.

[0051] The salt mist spray assembly is arranged on both sides of the conveying assembly, and the salt mist spray assembly is used to perform salt mist spray coating on the circuit board. The salt mist spray assembly includes a hollow structured rotating shaft 13 and a spray pipe 23 connected to one end of the rotating shaft 13. One side of the spray pipe 23 is connected to a high-pressure nozzle 24, and the high-pressure nozzle 24 is arranged above the conveyor belt 4. The rotating shaft 13 passes through the limiting wheel 9 and is rotatably installed in the through groove of the limiting frame 8. One end of the rotating shaft 13 extends into the second cavity 12 and is installed with an impeller 14.

[0052] In this embodiment, the rotating shaft 13 is set to a hollow structure, and one end of the rotating shaft 13 passes through the limiting wheel 9 and extends into the second cavity 12. The limiting wheel 9 and the rotating shaft 13 are fixedly connected. The limiting wheel 9 rotates due to the friction generated by the circuit board, driving the impeller 14 at the bottom end of the rotating shaft 13 to rotate, stirring and mixing the salt solution, ensuring the uniform concentration of the salt solution, ensuring the corrosion effect of the circuit board, and thus ensuring the accuracy of the anti-corrosion detection results.

[0053] The salt spray spray assembly also includes a piston plate 11 arranged in the second cavity 12, the piston plate 11 and the conveyor belt 4 are fixedly connected, a slide groove is opened on one side of the first cavity 10, a slider 21 is slidably connected in the slide groove, an accordion plate 22 is installed between the slider 21 and the slide groove, the piston plate 11 and the slider 21 are fixedly connected, and a connecting plate 18 is connected between the slider 21 and the conveyor belt 4.

[0054] In this embodiment, during the conveying process of the conveyor belt 4, the slider 21 is connected by the connecting plate 18, and the slider 21 is slidably connected in the slide groove, thereby driving the piston plate 11 to slide in the first cavity 10, squeezing the air and saline solution in the first cavity 10, so that the saline solution is sprayed out as salt mist through the first cavity 10, the second cavity 12, the rotating shaft 13, the spray pipe 23 and the high-pressure nozzle 24 in sequence, and the circuit board is corroded.

[0055] It should be noted that an accordion plate 22 is provided in the slide groove, which can seal the first cavity 10 to prevent leakage of the saline solution and will not hinder the sliding of the slider 21.

[0056] The accordion board 22 used in this embodiment is made of aluminum alloy or polycarbonate material, which has the characteristics of high strength, light weight, and corrosion resistance, and will not affect the normal use of the accordion board 22.

[0057] A telescopic assembly is connected between the connecting plates 18 , and the telescopic assembly includes a hollow shaft 19 and a connecting rod 20 that are slidably connected. One end of the connecting rod 20 and the hollow shaft 19 are both fixedly connected to one side of the connecting plate 18 .

[0058] In this embodiment, since the movement of the piston plate 11 needs to be driven by the transmission of the conveyor belt 4, and the piston plate 11 slides in the limit frame 8, the spacing between the limit frames 8 needs to be adjusted according to the size of the circuit board. Therefore, the conveyor belt 4 and the limit frame 8 are connected by a telescopic assembly. During the adjustment process, the sliding of the hollow shaft 19 and the connecting rod 20 follows the movement and telescope of the limit frame 8, thereby preventing the limit frame 8 from interfering with the connection structure between the conveyor belt 4 and the piston plate 11 during the process of adjusting the spacing.

[0059] It should be noted that the transmission cycle of the conveyor belt 4 is half a circle. In the process of conveying the circuit board by the conveyor belt 4, the lower surface of the conveyor belt 4 pulls the piston plate 11 to move in the first cavity 10 to spray the surface of the circuit board with salt mist until the circuit board is inspected. The second motor 40 drives in reverse, and the conveyor belt 4 is reset, driving the circuit board to move out of the inspection cabinet 1.

[0060] The collecting assembly includes two groups of suction boxes 33 connected by connecting pipes 34. The suction boxes 33 are connected to air bags 31 through suction pipes 32. An air inlet 42 connected to the conveying platform 6 is opened in the suction box 33. It also includes a friction roller 25 rotatably installed above the conveyor belt 4. Vertical plates 28 are provided at both ends of the friction roller 25. The surface of the friction roller 25 has sleeves 26 in an equidistant array. The sleeves 26 have grinding wheels 27 in an annular equidistant array. The grinding wheels 27 are rotatably connected to the sleeves 26.

[0061] In this embodiment, a collecting assembly is provided below the conveying assembly for collecting excess salt mist. Specifically, an air inlet 42 connected to the conveying platform 6 is provided in the air suction box 33. The friction roller 25 is started, and the friction roller 25 drives the shaft sleeve 26 to rotate on the surface of the circuit board. A grinding wheel 27 rotates in the shaft sleeve 26. The grinding wheel 27 rotates and rubs against the surface of the circuit board. During detection, the friction of the circuit surface of the to-be-tested position on the circuit board is accelerated, thereby increasing the contact between the salt mist and the copper strip to accelerate the erosion of the salt mist.

[0062] It should be noted that the grinding wheel 27 is made of soft material, which can not only achieve the friction effect with the circuit board, but also reduce the damage to the circuit board as much as possible.

[0063] Cams 29 are fixedly mounted at both ends of the friction roller 25 , a push rod 30 is arranged on the top of the air bag 31 , and the cam 29 and the ball on the top of the push rod 30 are fitted together.

[0064] During the rotation of the friction roller 25, the eccentric structure of the cam 29 applies periodic pressure to the push rod 30. The downward movement of the push rod 30 will squeeze the airbag 31. The one-way valve in the suction pipe 32 can control the discharge of the inhaled gas. During the rotation of the cam 29, the airbag 31 is reset, and the suction pipe 32 will collect the excess salt mist in time through the suction box 33.

[0065] In the present invention, the circuit board is placed on the upper surface of the conveyor belt 4, and the second motor 40 is started. The output shaft end of the second motor 40 and one end of the conveyor shaft 7 are both fixedly mounted with a synchronous pulley 41, and the two sets of synchronous pulleys 41 are connected in transmission, thereby driving the conveyor belt 4 to convey the circuit board;

[0066] When the circuit board is placed on the conveyor belt 4, the infrared energy is converted into an electrical signal through the distance sensor, and the electrical signal of the distance sensor and the first motor 36 is connected, and the first motor 36 is started to drive the gear 37 to rotate, and the gear 37 and the rack 38 are meshed, so that the two sets of racks 38 can be driven to move on the surface of the conveyor platform 6. Since the two sets of limit frames 8 are slidably connected to the conveyor platform 6 through the linear guide rail 39, the rack 38 drives the limit frames 8 to move, and the spacing between the limit frames 8 is adjusted, so that the limit wheel 9 can fit and limit the circuit boards of different sizes;

[0067] During the conveying process of the conveyor belt 4, the slider 21 is connected through the connecting plate 18, and the slider 21 is slidably connected in the chute, thereby driving the piston plate 11 to slide in the first cavity 10, squeezing the air and salt solution in the first cavity 10, so that the salt solution is sequentially sprayed through the first cavity 10, the second cavity 12, the rotating shaft 13, the spray pipe 23 and the high-pressure nozzle 24 to spray salt mist, and the circuit board is corroded;

[0068] The limiting wheel 9 is fixedly connected to the rotating shaft 13. The limiting wheel 9 rotates due to the friction force generated by the circuit board, driving the impeller 14 at the bottom of the rotating shaft 13 to rotate, stirring and mixing the salt solution to ensure uniform concentration of the salt solution and the corrosion effect of the circuit board, thereby ensuring the accuracy of the anti-corrosion detection structure;

[0069] The friction roller 25 is started, and the friction roller 25 drives the shaft sleeve 26 to rotate on the surface of the circuit board. A grinding wheel 27 rotates inside the shaft sleeve 26. The grinding wheel 27 and the surface of the circuit board rotate and rub against each other. During the detection, the friction of the circuit surface of the position to be tested on the circuit board is accelerated, and then the contact between the salt spray and the copper strip is increased to accelerate the erosion of the salt spray.

[0070] During the rotation of the friction roller 25, the eccentric structure of the cam 29 applies periodic pressure to the push rod 30. The downward movement of the push rod 30 will squeeze the airbag 31. The one-way valve in the suction pipe 32 can control the discharge of the inhaled gas. During the rotation of the cam 29, the airbag 31 is reset, and the suction pipe 32 will collect the excess salt mist in time through the suction box 33.

[0071] The circuit board is transported to the bottom of the detection module. The retractable terminal pins arranged in the detection module can electrically connect the enameled circuit of the section to be tested in the circuit board after the circuit board is attached by salt spray spray, and perform antioxidant detection. The detection results are displayed on the display screen 3.

[0072] The present invention also provides a circuit board detection method, comprising the following steps:

[0073] Step 1: Place the circuit board to be tested on the conveying assembly, and start the conveying assembly to move the circuit board to the bottom of the detection module;

[0074] Step 2: In the process of starting the conveying component to drive the circuit board to move, the salt spray spray component is driven to spray and coat the circuit board;

[0075] Step 3: In synchronization with step 2, the collection component collects excess salt mist in a timely manner.

[0076] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A circuit board detection device, comprising a detection cabinet (1) and a control cabinet (2) arranged above the detection cabinet (1), wherein a detection module is arranged in the control cabinet (2), and a display screen (3) for displaying circuit board detection results is arranged on the front side of the control cabinet (2), characterized in that: Also includes: A conveying assembly disposed in the control cabinet (2), the conveying assembly being used to convey the circuit board to below the detection module; A salt spray assembly is arranged on both sides of the conveying assembly, and the salt spray assembly is used to perform salt spray coating on the circuit board; The collecting assembly is arranged below the conveying assembly, and is used for collecting excess salt mist.

2. A circuit board detection device according to claim 1, characterized in that: The conveying assembly comprises a conveying platform (6) and a conveying belt (4) for placing circuit boards and connected to the conveying platform (6) in a driving manner, a push plate (5) being arranged on one side of the upper surface of the conveying belt (4), and limit frames (8) being symmetrically arranged on both sides of the conveying belt (4), a through slot being provided in the limit frame (8), and limit wheels (9) being arranged in an equidistant array in the through slot; The invention also comprises two groups of conveying shafts (7) arranged on the conveying platform (6), a conveying belt (4) being transmission-connected between the two groups of conveying shafts (7), a synchronous belt pulley (41) being installed at one end of one group of conveying shafts (7), a second motor (40) being installed at the bottom of the conveying platform (6), a synchronous belt pulley (41) being also fixedly installed at the output shaft end of the second motor (40), and the two groups of synchronous belt pulleys (41) being transmission-connected.

3. A circuit board detection device according to claim 2, characterized in that: The limiting frame (8) is slidably connected to the conveying platform (6) through a linear guide rail (39); a spacing adjustment component is arranged between the two groups of the limiting frames (8); the spacing adjustment component comprises a first motor (36); the first motor (36) is fixedly mounted on the lower surface of the conveying platform (6) through a bracket (35); a gear (37) is fixedly mounted on the output shaft end of the first motor (36); a rack (38) is fixedly connected to one side of the limiting frame (8); the two groups of the racks (38) are symmetrically arranged on both sides of the gear (37), and the racks (38) and the gear (37) are meshed.

4. A circuit board detection device according to claim 2, characterized in that: The detection cabinet (1) is provided with a liquid storage tank (16), and the limiting frame (8) is provided with a first cavity (10) and a second cavity (12) which are connected to each other. The liquid storage tank (16) and the first cavity (10) are connected to each other through a water pipe (15), and a valve (17) is connected to the water pipe (15).

5. A circuit board detection device according to claim 4, characterized in that: The salt spray spray assembly comprises a rotating shaft (13) with a hollow structure and a spray pipe (23) connected to one end of the rotating shaft (13); one side of the spray pipe (23) is connected to a high-pressure nozzle (24); the high-pressure nozzle (24) is arranged above the conveyor belt (4); the rotating shaft (13) passes through a limiting wheel (9) and is rotatably mounted in a through groove of a limiting frame (8); one end of the rotating shaft (13) extends into a second cavity (12) and is mounted with an impeller (14).

6. A circuit board detection device according to claim 5, characterized in that: The salt spray spray assembly further comprises a piston plate (11) arranged in the second cavity (12), the piston plate (11) and the conveyor belt (4) are fixedly connected, a slide groove is provided on one side of the first cavity (10), a slider (21) is slidably connected in the slide groove, an accordion plate (22) is installed between the slider (21) and the slide groove, the piston plate (11) and the slider (21) are fixedly connected, and a connecting plate (18) is connected between the slider (21) and the conveyor belt (4).

7. A circuit board detection device according to claim 6, characterized in that: A telescopic assembly is connected between the connecting plates (18), and the telescopic assembly comprises a slidably connected hollow shaft (19) and a connecting rod (20), and one end of the connecting rod (20) and the hollow shaft (19) are both fixedly connected to one side of the connecting plate (18).

8. A circuit board detection device according to claim 1, characterized in that: The collecting assembly comprises two groups of air suction boxes (33) connected via a connecting pipe (34), the air suction boxes (33) are connected to an air bag (31) via an air suction pipe (32), and an air inlet hole (42) connected to a conveying platform (6) is provided in the air suction box (33); It also includes a friction roller (25) rotatably mounted above the conveyor belt (4), with vertical plates (28) arranged at both ends of the friction roller (25), axle sleeves (26) arranged in an equidistant array on the surface of the friction roller (25), a grinding wheel (27) arranged in an annular equidistant array inside the axle sleeve (26), and the grinding wheel (27) rotatably connected inside the axle sleeve (26).

9. A circuit board detection device according to claim 8, characterized in that: Cams (29) are fixedly mounted at both ends of the friction roller (25), a push rod (30) is arranged on the top of the air bag (31), and the spheres at the tops of the cam (29) and the push rod (30) are fitted together.

10. A circuit board detection method, based on a circuit board detection device according to any one of claims 1, characterized in that: The steps include: Step 1: Place the circuit board to be tested on the conveying assembly, and start the conveying assembly to move the circuit board to the bottom of the detection module; Step 2: In the process of starting the conveying component to drive the circuit board to move, the salt spray spray component is driven to spray and coat the circuit board; Step 3: In synchronization with step 2, the collection component collects excess salt mist in a timely manner.

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