Automatic hole inspection machine for circuit board

Abstract

The utility model relates to the technical field of hole inspection machines, and discloses an automatic hole inspection machine for circuit boards, comprising a workbench and a high-definition camera, wherein two side plates are fixedly installed on the upper surface of the workbench, two first shafts and two second shafts are rotatably connected between the two side plates, multiple first belts are slidably connected between the outer walls of the two first shafts, and multiple second belts are slidably connected between the outer walls of the two second shafts; multiple first belts and multiple second belts are driven to move by a driving unit, and the circuit board is first moved to the first belt through the second belt, and two groups of dust removal units respectively remove dust from the circuit boards moved to the second belt and the first belt, and the giving holes between adjacent second belts and adjacent first belts are staggered, so that all the holes on the circuit board can be given way, so that the dust removal unit can completely blow out the dust in the holes of the circuit board, thereby ensuring the accuracy of the high-definition camera in checking the holes of the circuit board, realizing automatic and accurate hole inspection, and improving the hole inspection efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of hole inspection machines, in particular to an automatic hole inspection machine for a circuit board. Background Art

[0002] During the processing of circuit boards, many holes need to be drilled densely. The hole positions have a great impact on the subsequent processes. The circuit boards need to be inspected after drilling. Drilling inspection is crucial to the quality of PCB boards. Compared with traditional manual visual inspection, hole inspection machines can conduct all-round quality control of hole quality during drilling, copper plating, and shipment stages. Hole inspection machines have strong functional characteristics and great advantages over manual visual inspection. The hole inspection machine has a strong effect on hole quality in terms of efficiency, precision, and quality control.

[0003] Prior art, such as the patent with publication number CN212238444U, discloses a hole inspection device for circuit boards after drilling, including a working platform, two positioning brackets are arranged on the working platform along the length direction, the distance between the two positioning brackets matches the width of the circuit board, a row of several rollers are arranged between the two positioning brackets, a driving motor is arranged on the working platform, the driving motor is connected to one of the rollers, a high-definition camera is arranged above the two positioning brackets for photographing the circuit board below, and a host computer is also arranged on the working platform, the host computer stores photos of standard circuit boards after drilling, the high-definition camera is electrically connected to the host computer to transmit the photographed photos to the host computer for comparison with the photos of the standard circuit board; the utility model improves the hole inspection efficiency and is more convenient to operate.

[0004] The existing technology still has shortcomings:

[0005] Before the hole inspection device in the prior art inspects the hole of the circuit board, the circuit board is first placed on the roller, and the air is blown to the circuit board through the ventilation pipe and the air jet hole to blow away the dust that may exist on the circuit board to avoid false detection caused by the dust. However, in actual use, the above-mentioned existing roller lacks the drive for the circuit board, and the circuit board needs to be manually picked up and placed. After the dust is removed, it needs to be taken to the belt for hole inspection. The degree of automation is low, and it is time-consuming and labor-intensive. The overall hole inspection efficiency is low. Therefore, an automatic circuit board hole inspection machine is proposed. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides an automatic hole inspection machine for a circuit board, which improves the overall degree of automation, realizes dust removal and hole inspection for the circuit board, ensures the accuracy of detection, and improves the efficiency of hole inspection.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic hole inspection machine for a circuit board, comprising a workbench and a high-definition camera, two side panels are fixedly installed on the upper surface of the workbench, two first shafts and two second shafts are rotatably connected between the two side panels, multiple first belts are slidably connected between the outer walls of the two first shafts, multiple second belts are slidably connected between the outer walls of the two second shafts, the first belts and the second belts are staggered, a driving unit is installed between the workbench, one of the first shafts and one of the second shafts, the driving unit drives one of the first shafts and one of the second shafts to rotate, and clearance holes are provided between adjacent first belts and adjacent second belts, two groups of dust removal units are installed on the upper end surfaces of the two side panels, the dust removal unit comprises two connecting seats fixedly installed with the upper end surfaces of the two side panels respectively, a vent pipe is installed between the two connecting seats, a plurality of air outlet nozzles facing the workbench are fixedly connected on the upper end surfaces of the vent pipe, the two vent pipes are respectively located directly above the first belt and the second belt, and the high-definition camera is fixedly installed on the upper end surfaces of the two side panels and directly above the first belt.

[0008] Preferably, the two first shafts and the two second shafts are alternately distributed in sequence, and one end of the plurality of first belts and the plurality of second belts are respectively sleeved outside the adjacent second shafts and the first shaft.

[0009] Preferably, one end of one of the adjacent first shafts and one of the adjacent second shafts passes through one of the side panels, and the driving unit includes a transmission wheel installed on the first shaft and the second shaft located outside the side panel and a motor installed on the workbench, the output shaft of the motor is fixedly connected to the end face of the second shaft with one end passing through the outside of the side panel, and the two transmission wheels are connected by a transmission belt.

[0010] Preferably, the transmission wheel is a sprocket, the transmission belt is a chain, and the transmission belt is meshingly connected with the transmission wheel.

[0011] Preferably, the air outlet nozzles of the ventilation pipe located directly above the first belt and the second belt correspond to the clearance holes between adjacent first belts and the clearance holes between adjacent second belts respectively.

[0012] Preferably, a dust outlet hole is formed through the upper surface of the workbench, and the dust outlet hole corresponds to the clearance hole.

[0013] Preferably, a guide bucket corresponding to the dust outlet hole is installed on the bottom surface of the workbench, and the bottom surface of the guide bucket is an inclined structure.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model drives multiple first belts and multiple second belts to move through a driving unit. The circuit board is first moved to the first belt through the second belt. Two groups of dust removal units remove dust from the circuit boards moved to the second belt and the first belt respectively. The make way holes between adjacent second belts and adjacent first belts are staggered, and all holes on the circuit board can be made to make way, so that the dust removal unit can completely blow out the dust in the holes of the circuit board, thereby ensuring the accuracy of the high-definition camera in inspecting the holes of the circuit board, realizing automatic and accurate hole inspection, and improving the hole inspection efficiency.

[0016] 2. The two first axes and the two second axes in the utility model are staggered in sequence, so that the circuit board can be smoothly moved from the second belt to the first belt, ensuring the stability of the circuit board transportation.

[0017] 3. The utility model opens a dust outlet hole on the workbench and installs a guide bucket on the bottom surface of the workbench, so that the dust removed from the circuit board by the dust removal unit can be guided out through the dust outlet hole and the guide bucket, which is convenient for collecting dust.

[0018] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the utility model from an end view;

[0021] Figure 3 It is a bottom view schematic diagram of the overall structure of the utility model;

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of one of the side panels of the utility model.

[0023] In the figure: 1. workbench; 2. side panel; 3. first axis; 4. second axis; 5. drive unit; 51. motor; 52. transmission wheel; 53. transmission belt; 6. dust removal unit; 61. connecting seat; 62. ventilation pipe; 63. air outlet nozzle; 7. first belt; 8. second belt; 9. clearance hole; 10. dust outlet hole; 11. guide bucket; 12. high-definition camera. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this technical field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The automatic hole inspection machine for circuit boards of this embodiment includes a workbench 1 and a high-definition camera 12. Two side panels 2 are fixedly installed on the upper surface of the workbench 1. Two first shafts 3 and two second shafts 4 are rotatably connected between the two side panels 2. Multiple first belts 7 are slidably connected between the outer walls of the two first shafts 3. Multiple second belts 8 are slidably connected between the outer walls of the two second shafts 4. The first belts 7 and the second belts 8 are staggered. A driving unit 5 is installed between the workbench 1, one of the first shafts 3 and one of the second shafts 4. The driving unit 5 drives one of the first shafts 3 and one of the second shafts 4. A second shaft 4 rotates, and a clearance hole 9 is provided between adjacent first belts 7 and adjacent second belts 8. Two sets of dust removal units 6 are installed on the upper end surfaces of the two side panels 2. The dust removal unit 6 includes two connecting seats 61 respectively fixedly installed with the upper end surfaces of the two side panels 2. A ventilation pipe 62 is installed between the two connecting seats 61. The upper part of the ventilation pipe 62 is fixedly connected with multiple air outlet nozzles 63 facing the workbench 1. The two ventilation pipes 62 are respectively located directly above the first belt 7 and the second belt 8. The high-definition camera 12 is fixedly installed on the upper end surfaces of the two side panels 2 and is located directly above the first belt 7.

[0026] like Figure 1 , 2As shown in , 4, the hole inspection machine structure in the utility model is similar to the existing hole inspection machine structure, such as a hole inspection device for circuit board drilling disclosed in the patent with publication number CN212238444U. The main improvement of the utility model is to improve the overall automation level, realize dust removal and hole inspection of the circuit board, ensure the accuracy of detection, and improve the efficiency of hole inspection; the workbench 1 and the high-definition camera 12 in the utility model are both existing technologies, wherein the high-definition camera 12 takes pictures of the circuit board, and the pictures of the circuit board taken are compared with the pictures of the standard circuit board to detect the openings on the circuit board; when the hole inspection of the circuit board is required, the circuit board can be placed on the second belt 8 by an external robot arm, and the driving unit 5 is used to control one of the first shafts 3 and one of the second shafts 4 to rotate, so that the first belt 7 and the second belt 8 move, and the second belt 8 drives the circuit board to move in the direction of the first belt 7, and ventilates into the ventilation pipe 62, The gas is ejected through the gas outlet nozzle 63 along the vent pipe 62. When the circuit board passes through the vent pipe 62 above the second belt 8, the gas is blown toward the circuit board, so that the dust in the openings on the circuit board located directly above the give-way holes 9 between adjacent second belts 8 is blown out by the gas. The second belt 8 then transports the circuit board to the first belt 7, and the first belt 7 continues to drive the circuit board to move. When the circuit board passes through the vent pipe 62 above the first belt 7, the gas is blown toward the circuit board, so that the dust in the openings on the circuit board located directly above the give-way holes 9 between adjacent first belts 7 is blown out by the gas. The give-way holes 9 between adjacent first belts 7 and adjacent second belts 8 are misaligned with each other, so that the blown gas can blow out the dust in all the openings on the circuit board through the give-way holes 9. The cleaned circuit board is transported to the bottom of the high-definition camera 12 for hole inspection. The circuit board after dust cleaning has better accuracy when inspecting the hole, and the overall automatic hole inspection is realized, thereby improving the hole inspection efficiency.

[0027] like Figure 1 , 2 As shown in , two first shafts 3 and two second shafts 4 are alternately arranged in sequence, and one ends of a plurality of first belts 7 and a plurality of second belts 8 are respectively sleeved outside the adjacent second shafts 4 and first shafts 3; the staggered distribution of the first shafts 3 and the second shafts 4 enables the second belt 8 to contact the first belt 7 before the circuit board is separated from the second belt 8 when conveying the circuit board to the vicinity of the first belt 7, thereby allowing the circuit board to be smoothly conveyed from the second belt 8 to the first belt 7, thereby ensuring the stability of the circuit board conveyance.

[0028] like Figure 1As shown, one end of one of the adjacent first shafts 3 and one of the second shafts 4 passes through one of the side panels 2, and the driving unit 5 includes a transmission wheel 52 installed on the first shaft 3 and the second shaft 4 outside the side panel 2 and a motor 51 installed on the workbench 1, the output shaft of the motor 51 is fixedly connected to the end face of the second shaft 4 with one end passing through the outside of the side panel 2, and the two transmission wheels 52 are connected by a transmission belt 53; when the first belt 7 and the second belt 8 are needed to move, the motor 51 is started to work, and the motor 51 drives the second shaft 4 connected thereto to rotate, and the second shaft 4 drives one of the first shafts 3 to rotate synchronously through the transmission wheel 52 on its outer wall in cooperation with the transmission belt 53, and the rotating second shaft 4 and the first shaft 3 respectively drive the second belt 8 and the first belt 7 to move, so as to realize the movement of the circuit board, and a single driving source is used to realize the rotation of the first shaft 3 and the second shaft 4, thereby reducing the manufacturing cost.

[0029] Among them, the above-mentioned motor 51 can be purchased on the market. It is a mature technology and has been fully disclosed, so it is not repeated in the specification. The motor 51 is equipped with a power connection line, and it is electrically connected to the external main controller and 220V phase voltage (or 380V line voltage) through the power line, and the main controller can be a conventional known device such as a computer that plays a control role.

[0030] like Figure 1 As shown, the transmission wheel 52 is a sprocket, the transmission belt 53 is a chain, and the transmission belt 53 is meshed with the transmission wheel 52; the transmission wheel 52 which is a sprocket and the transmission belt 53 which is a chain can ensure that the first shaft 3 and the second shaft 4 rotate synchronously, thereby ensuring that the first belt 7 and the second belt 8 move synchronously and at the same speed, thereby ensuring the stability of the circuit board transportation.

[0031] like Figure 2 As shown, the air outlet nozzle 63 of the ventilation pipe 62 located directly above the first belt 7 and the second belt 8 corresponds to the make way holes 9 between adjacent first belts 7 and the make way holes 9 between adjacent second belts 8 respectively; the air outlet nozzle 63 corresponds to the position of the make way holes 9, ensuring that the wind blown out by the air outlet nozzle 63 can blow out the dust in the openings corresponding to the make way holes 9 on the circuit board.

[0032] like Figure 3 As shown, a dust hole 10 is formed through the upper surface of the workbench 1, and the dust hole 10 corresponds to the clearance hole 9; after the dust in the opening on the circuit board is blown out, it passes through the dust hole 10 along the clearance hole 9, and the blown dust does not accumulate on the workbench 1, so it is easy to collect and clean.

[0033] like Figure 3As shown, a guide bucket 11 corresponding to the dust outlet hole 10 is installed on the bottom surface of the workbench 1, and the bottom surface of the guide bucket 11 is an inclined structure; the dust blown out from the dust outlet hole 10 falls on the guide bucket 11, and the inclined surface of the bottom surface of the guide bucket 11 is used to guide the dust to the outside of the workbench 1, so as to facilitate dust collection.

[0034] The implementation steps in this embodiment are as follows: when it is necessary to inspect the hole of the circuit board, the circuit board can be placed on the second belt 8 by an external robot arm, and the motor 51 works. The motor 51 drives the second shaft 4 connected thereto to rotate, and the second shaft 4 drives one of the first shafts 3 to rotate synchronously through the transmission wheel 52 on its outer wall in cooperation with the transmission belt 53. The rotating second shaft 4 and the first shaft 3 respectively drive the second belt 8 and the first belt 7 to move, and the second belt 8 drives the circuit board to move in the direction of the first belt 7, and ventilates into the ventilation pipe 62. The gas is ejected through the air outlet nozzle 63 along the ventilation pipe 62. When the circuit board passes through the ventilation pipe 62 above the second belt 8, the gas is blown toward the circuit board, so that the dust in the opening just above the yield hole 9 between adjacent second belts 8 on the circuit board is blown out by the gas. , the second belt 8 then transports the circuit board to the first belt 7, and the first belt 7 continues to drive the circuit board to move. When the circuit board passes through the vent pipe 62 above the first belt 7, the gas is blown toward the circuit board, so that the dust in the openings on the circuit board located directly above the give-way holes 9 between adjacent first belts 7 is blown out by the gas. The give-way holes 9 between adjacent first belts 7 and adjacent second belts 8 are misaligned with each other, so that the blown gas can blow out the dust in all the openings on the circuit board through the give-way holes 9. After the dust in the openings on the circuit board is blown out, it passes through the dust outlet holes 10 along the give-way holes 9 and falls on the guide bucket 11. The inclined surface of the bottom surface of the guide bucket 11 is used to guide the dust to the outside of the workbench 1 for collection. The cleaned circuit board is transported to the bottom of the high-definition camera 12 for hole inspection.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A circuit board automatic hole inspection machine, comprising a workbench (1) and a high-definition camera (12), characterized in that: Two side plates (2) are fixedly mounted on the upper surface of the workbench (1); two first shafts (3) and two second shafts (4) are rotatably connected between the two side plates (2); a plurality of first belts (7) are slidably connected between the outer walls of the two first shafts (3); a plurality of second belts (8) are slidably connected between the outer walls of the two second shafts (4); the first belts (7) and the second belts (8) are staggered; a driving unit (5) is mounted between the workbench (1), one of the first shafts (3) and one of the second shafts (4); the driving unit (5) drives one of the first shafts (3) and one of the second shafts (4) to rotate; adjacent first belts ( A clearance hole (9) is provided between the first belt (7) and the adjacent second belt (8), two sets of dust removal units (6) are installed on the upper end surfaces of the two side panels (2), and the dust removal unit (6) includes two connecting seats (61) respectively fixedly installed on the upper end surfaces of the two side panels (2), a ventilation pipe (62) is installed between the two connecting seats (61), and the upper part of the ventilation pipe (62) is fixedly connected with a plurality of air outlet nozzles (63) facing the workbench (1), and the two ventilation pipes (62) are respectively located directly above the first belt (7) and the second belt (8), and a high-definition camera (12) is fixedly installed on the upper end surfaces of the two side panels (2) and located directly above the first belt (7).

2. The automatic hole inspection machine for circuit boards according to claim 1, characterized in that: The two first shafts (3) and the two second shafts (4) are arranged alternately in sequence, and one end of the plurality of first belts (7) and the plurality of second belts (8) are respectively sleeved outside the adjacent second shafts (4) and first shafts (3).

3. The automatic hole inspection machine for circuit boards according to claim 1, characterized in that: One end of one of the adjacent first shafts (3) and one of the adjacent second shafts (4) passes through one of the side plates (2); the driving unit (5) comprises a transmission wheel (52) mounted on the first shaft (3) and the second shaft (4) outside the side plate (2) and a motor (51) mounted on the workbench (1); the output shaft of the motor (51) is fixedly connected to the end face of the second shaft (4) one end of which passes through the outside of the side plate (2); and the two transmission wheels (52) are connected in transmission via a transmission belt (53).

4. The automatic hole inspection machine for circuit boards according to claim 3, characterized in that: The transmission wheel (52) is a sprocket wheel, the transmission belt (53) is a chain, and the transmission belt (53) is meshedly connected with the transmission wheel (52).

5. The automatic hole inspection machine for circuit boards according to claim 1, characterized in that: The air outlet nozzle (63) of the ventilation pipe (62) located directly above the first belt (7) and the second belt (8) corresponds to the clearance holes (9) between adjacent first belts (7) and the clearance holes (9) between adjacent second belts (8) respectively.

6. The automatic circuit board hole inspection machine according to claim 1, characterized in that: A dust outlet hole (10) is formed through the upper surface of the workbench (1), and the dust outlet hole (10) corresponds to the clearance hole (9).

7. The automatic hole inspection machine for circuit boards according to claim 6, characterized in that: A guide bucket (11) corresponding to the dust outlet hole (10) is installed on the bottom surface of the workbench (1), and the bottom surface of the guide bucket (11) is an inclined surface structure.

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