Welding surface detection device based on machine vision detection

Abstract

The invention discloses a welding surface detection device based on machine vision detection, and relates to the field of welding surface detection devices.The welding surface detection device comprises a detection table, a notch is formed in the detection table, a conveying belt is in transmission connection with the interior of the notch so that a PCB to be detected can be conveyed, and limiting protruding points are arranged on the conveying belt; and the side of the detection table is fixedly connected with a supporting table plate. The rotating handle is twisted to drive the rotating disc to rotate, then the movable block is driven to move under the transmission effect of the connecting rod, and the toothed plate fixedly connected with the end of the movable block moves synchronously to drive the two gears combined with the toothed plate to rotate in different directions; the deviation rectifying rods fixedly connected with the outer rings of the first rotating shafts inserted into the inner rings of the gears move in the opposite directions or away from each other, so that the distance between the two ends of each deviation rectifying rod is adjusted, PCBs of different sizes can conveniently penetrate through the interiors of the two deviation rectifying rods to be automatically corrected, the placement positions of the whole PCBs are unified, and the subsequent detection effect is better.

Description

Technical Field

[0001] The present invention relates to the field of welding surface detection devices, and in particular to a welding surface detection device based on machine vision detection. Background Art

[0002] PCB board solder surface inspection is a key link to ensure the stability and reliability of electronic equipment. By inspecting the quality of solder joints, connection problems caused by poor soldering can be discovered and resolved in a timely manner to ensure the quality of electronic products. Solder surface inspection includes checking the appearance, brightness, solder distribution and other characteristics of solder joints to determine whether the solder joints meet quality requirements. Commonly used inspection methods include appearance inspection, sealing inspection, non-destructive testing, etc., among which visual cameras are used to assist in inspection to ensure clearer observation of the solder surface.

[0003] The existing Chinese patent authorization announcement number: CN218766701U discloses a machine vision welding surface detection device. It relates to the technical field of welding surface detection devices. It is composed of a detection positioning substrate, a carrier frame, a sliding adjustment structure, a visual camera, and a backlight adjustment structure. The detection positioning substrate can provide a PCB workpiece placement area, and the welding surface is placed on the detection positioning substrate with the welding surface facing up, which guarantees the placement performance to a certain extent. At the same time, an adjustment structure and a visual camera are provided. The visual camera can be adjusted according to the shooting requirements to meet the shooting requirements in different directions. The backlight adjustment structure can adjust the position according to the fill light requirements to ensure the comprehensiveness of the shooting.

[0004] The existing detection devices still have the following problems when in use: the existing detection devices are unable to perform deviation correction processing on the board to be tested placed on the miscellaneous detection table, so the plates placed on the detection table need to be manually straightened by the staff, which increases the workload, and there are deviations in the manual placement, resulting in unsatisfactory subsequent detection results. At the same time, the plates cannot be tested continuously, resulting in low detection efficiency.

[0005] Therefore, it is necessary to invent a welding surface detection device based on machine vision detection to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a welding surface inspection device based on machine vision inspection to solve the problem that the existing inspection device proposed in the above background technology is unable to perform deviation correction processing on the plate surface to be inspected placed on a miscellaneous inspection table. In this way, the plate placed on the inspection table needs to be manually straightened by the staff, which increases the workload. In addition, there are deviations in manual placement, resulting in unsatisfactory subsequent inspection results. At the same time, it is impossible to continuously inspect the plate, resulting in low inspection efficiency.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a welding surface detection device based on machine vision detection, comprising a detection table, a notch is arranged inside the detection table, and a conveyor belt is connected to the internal transmission of the notch so as to convey the PCB board to be detected, and a limited position convex point is arranged on the conveyor belt, a supporting table is fixedly connected to the side of the detection table, and a detection camera is installed on the top of the supporting table through a mechanical arm, so that the detection camera can detect the welding surface of the plate, a cavity is arranged inside the detection table, and further comprising:

[0008] A deviation correction component, wherein the interior of the cavity is rotatably connected to a rotating shaft 1 through a bearing, and a deviation correction rod is fixedly sleeved on the outer ring of the rotating shaft 1, and the two deviation correction rods are used to properly correct the non-uniform plates on the conveyor belt;

[0009] Adjustment component, the detection table is movably connected with a rotating shaft 2 inside, and the top of the rotating shaft 2 is fixedly connected with a rotating handle, and the rotating shaft 2 is movably connected to the turntable, and the turntable and the movable block are movably connected through a connecting rod, the outer ring of the rotating shaft 1 is fixedly sleeved with a gear, and the gear is meshingly connected with the tooth plate, and the end of the tooth plate is fixedly connected to the movable block, so as to adjust the distance between the ends of the two correcting rods, so that the device is suitable for correcting the deviation of plates of different sizes.

[0010] Preferably, there are several limit protrusions, and the limit protrusions are distributed in a straight line with equal spacing, and the limit protrusions are made of silicone. When the PCB board is autonomously corrected by the correction rod, the PCB board and the conveyor belt move relative to each other. Under the limiting effect of the limit protrusions, the edge of the PCB board will directly support the limit protrusions, so that the spacing between each PCB board is the same, so that the placement position of the entire PCB board is unified, and the subsequent detection effect is better.

[0011] Preferably, the turntable consists of disk one, disk two, short rod one, a ring block, a ring groove and a through hole, wherein disk one and disk two are fixedly connected by short rod one, and through holes are provided between disk one and disk two, the diameter of the inner circle through hole of disk one is smaller than the diameter of the inner circle through hole of disk two, and a rotating shaft two is inserted into the through holes in disk one and disk two, and the rotating shaft two does not contact the inner wall of the through hole inside disk two.

[0012] Preferably, a ring groove is provided at the bottom of the second disk, and the ring groove is rotatably connected to the upper end of the ring block fixedly connected to the inner wall of the cavity to ensure the stability of the overall rotation of the turntable.

[0013] Preferably, a notch is provided at one end of the movable block close to the turntable, and a short rod 2 is fixedly connected to the inner wall of the notch, and short rod 2 and short rod 1 pass through the two ends of the connecting rod, and short rod 2 and short rod 1 are rotatably connected to the through holes at the two ends of the connecting rod through bearings, so that when the turntable rotates, the connecting rod is displaced synchronously, thereby facilitating the movement of the movable block so that the movement of the tooth plate drives the rotation of the gear meshing with it.

[0014] Preferably, both upper and lower ends of the movable block are fixedly connected with protrusions, and the protrusions move inside upper and lower symmetrical limit grooves arranged inside the detection platform, and the limit grooves are connected to the cavity to ensure the stability of the movable block.

[0015] Preferably, the lower half of the rotating shaft 2 is provided with a thread, and the lower half of the rotating shaft 2 is threadedly connected to a preset thread groove inside the testing platform, and the threaded connection has a self-locking effect, so that when the rotating handle is not rotated subsequently, the rotating shaft 2 can self-lock without an external locking part.

[0016] Preferably, the upper half of the rotating shaft 2 is provided with a groove, and the groove is movably connected to a limit rod fixedly connected to the inner wall of the through hole set inside the disc 1. In the process of rotating the rotating shaft 2 which is threadedly connected to the detection platform, the rotating shaft 2 will be displaced up and down. The threaded groove set inside the detection platform provides a moving space for the rotating shaft 2. At the same time, the limiting connection between the disc 1 and the rotating shaft 2 ensures that the rotation of the rotating shaft 2 drives the entire turntable to rotate, and the two discs will not affect the displacement of the rotating shaft 2 during rotation.

[0017] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0018] The present invention drives the rotation of the turntable by twisting the rotating handle, and then drives the movable block to achieve displacement under the transmission action of the connecting rod, and the toothed plate fixedly connected to the end of the movable block moves synchronously to drive the two gears combined with it to rotate in different directions, and the rotating shaft inserted into the inner ring of the gear and the correcting rod fixedly connected to the outer ring move towards or away from each other, so that the distance between the two ends of the correcting rod can be adjusted, which is convenient for PCB boards of different sizes to pass through the inside of the two correcting rods to achieve self-adjustment, so that the placement position of the entire PCB board is unified, and the subsequent detection effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1It is a three-dimensional diagram of the overall structure of the present invention;

[0021] Figure 2 It is an exploded view of the overall structure of the present invention;

[0022] Figure 3 It is a three-dimensional diagram of the internal structure of the detection platform of the present invention (partially cut horizontally);

[0023] Figure 4 It is a three-dimensional diagram of the internal structure of the detection platform (vertical partial cut state) of the present invention;

[0024] Figure 5 It is an exploded view of the internal structure of the adjustment component and the deviation correction component of the present invention;

[0025] Figure 6 It is an exploded view of the internal structure of the regulating component of the present invention.

[0026] Description of reference numerals:

[0027] 1. Inspection table; 2. Notch; 3. Conveyor belt; 4. Limiting convex point; 5. Support table; 6. Inspection camera; 7. Cavity; 8. Correction assembly; 801. Rotation axis 1; 802. Correction rod; 9. Adjustment assembly; 901. Turntable; 9011. Disc 1; 9012. Disc 2; 9013. Short rod 1; 9014. Ring block; 9015. Ring groove; 9016. Through hole; 902. Movable block; 9021. Convex block; 9022. Limiting groove; 903. Notch; 904. Short rod 2; 905. Connecting rod; 906. Tooth plate; 907. Gear; 908. Turning handle; 909. Rotation axis 2; 9091. Thread; 9092. Channel; 9093. Limiting rod. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] The present invention provides Figure 1-6 A welding surface inspection device based on machine vision inspection is shown, comprising an inspection table 1, a notch 2 is arranged inside the inspection table 1, and a conveyor belt 3 is connected to the internal transmission of the notch 2 so as to convey the PCB board to be inspected, and a limit convex point 4 is arranged on the conveyor belt 3, a supporting table 5 is fixedly connected to the side of the inspection table 1, and a detection camera 6 is installed on the top of the supporting table 5 through a mechanical arm, so that the detection camera 6 can detect the welding surface of the plate, and a cavity 7 is arranged inside the inspection table 1, and further comprising:

[0030] The deflection correction component 8 has a rotating shaft 801 rotatably connected to the cavity 7 through a bearing, and a deflection correction rod 802 is fixedly sleeved on the outer ring of the rotating shaft 801, and the two deflection correction rods 802 are used to properly correct the plates with inconsistent positions on the conveyor belt 3;

[0031] Adjustment component 9, the detection table 1 is movably connected with a rotating shaft 2 909 inside, and the top of the rotating shaft 2 909 is fixedly connected with a rotating handle 908, and the rotating shaft 2 909 is movably connected to the turntable 901, and the turntable 901 and the movable block 902 are movably connected through a connecting rod 905, the outer ring of the rotating shaft 1 801 is fixedly sleeved with a gear 907, and the gear 907 is meshed and connected with the tooth plate 906, and the end of the tooth plate 906 is fixedly connected to the movable block 902, so as to adjust the distance between the ends of the two correcting rods 802, so as to facilitate the device to be applied to the correction of plates of different sizes, so that the applicability of the device is improved.

[0032] There are several limit convex points 4, and the limit convex points 4 are distributed in a straight line with equal spacing, and the limit convex points 4 are made of silicone. When the PCB board is self-corrected by the correction rod 802, the PCB board and the conveyor belt 3 move relative to each other. Under the limiting effect of the limit convex points 4, the PCB board in the conveying state is restricted by the two correction rods 802, and the edge of the PCB board will directly support the limit convex points 4, so that the spacing between each PCB board is the same, so that the placement position of the entire PCB board is unified, and the subsequent detection effect is better.

[0033] The turntable 901 is composed of a disk 1 9011, a disk 2 9012, a short rod 1 9013, a ring block 9014, an annular groove 9015 and a through hole 9016, wherein the disk 1 9011 and the disk 2 9012 are fixedly connected by the short rod 1 9013, and through holes 9016 are provided between the disk 1 9011 and the disk 2 9012, and the diameter of the inner circle through hole 9016 of the disk 1 9011 is smaller than the diameter of the inner circle through hole 9016 of the disk 2 9012, and a rotating shaft 2 909 is inserted into the through holes 9016 in the disk 1 9011 and the disk 2 9012, and the rotating shaft 2 909 does not contact the inner wall of the through hole 9016 in the disk 2 9012.

[0034] The bottom of the second disk 9012 is provided with an annular groove 9015 , and the annular groove 9015 is rotatably connected to the upper end of a ring block 9014 fixedly connected to the inner wall of the cavity 7 , thereby ensuring the stability of the overall rotation of the turntable 901 .

[0035] A notch 903 is provided at one end of the movable block 902 close to the turntable 901, and a short rod 2 904 is fixedly connected to the inner wall of the notch 903, and the short rod 2 904 and the short rod 1 9013 pass through the two ends of the connecting rod 905, and the short rod 2 904 and the short rod 1 9013 are rotatably connected to the through holes at the two ends of the connecting rod 905 through bearings, so that when the turntable 901 rotates, the connecting rod 905 is displaced synchronously, thereby facilitating the movement of the movable block 902, so that the tooth plate 906 moves to drive the rotation of the gear 907 meshing with it.

[0036] The upper and lower ends of the movable block 902 are fixedly connected with protrusions 9021, and the protrusions 9021 move inside the upper and lower symmetrical limiting grooves 9022 set inside the detection platform 1. The limiting grooves 9022 are connected to the cavity 7 to ensure the stability of the movable block 902.

[0037] The lower part of the rotating shaft 909 is provided with a thread 9091, and the lower part of the rotating shaft 909 is threadedly connected with the preset thread groove inside the detection platform 1. The threaded connection has a self-locking effect. In this way, when the rotating handle 908 is not rotated subsequently, the rotating shaft 909 can be self-locked without an external locking part.

[0038] A groove 9092 is provided on the upper half of the rotating shaft 909, and the groove 9092 is movably connected to a limit rod 9093 fixedly connected to the inner wall of the through hole 9016 set inside the disk 1 9011. During the rotation of the rotating shaft 909 which is threadedly connected to the detection platform 1, the rotating shaft 909 will be displaced up and down. The threaded groove set inside the detection platform 1 provides a moving space for the rotating shaft 909. At the same time, the limiting connection between the disk 1 9011 and the rotating shaft 909 ensures that the rotation of the rotating shaft 909 drives the entire turntable 901 to rotate, and the two disks will not affect the displacement of the rotating shaft 909 during rotation.

[0039] Working principle: When using a welding surface inspection device based on machine vision inspection, firstly, the rotating handle 908 is twisted to drive the rotating disk 901 to rotate, and the disk 1 9011 and the disk 2 9012 are connected by the short rod 1 9013, and the rotating shaft 2 909 passes through the through hole 9016 set inside the disk 1 9011 and the disk 2 9012, and at the same time, the limit rod 9093 fixedly connected to the inner wall of the through hole 9016 inside the disk 1 9011 and the groove 909 set inside the rotating shaft 2 909 2 is movably connected, so that the turntable 901 can be synchronously rotated in the process of twisting the handle 908 to drive the second rotating shaft 909 to rotate, and the two ends of the connecting rod 905 are respectively rotatably connected with the short rod 1 9013 and the outer ring of the short rod 2 904 through bearings, and then under the transmission action of the connecting rod 905, the connecting rod 905 synchronizes the turntable 901 to drive the movable block 902 to achieve displacement, and the protrusions 9021 fixedly connected at the upper and lower ends of the movable block 902 move inside the limiting groove 9022, which also The stability of the movable block 902 is guaranteed. The toothed plate 906 fixedly connected to the end of the movable block 902 moves synchronously to drive the two gears 907 meshing therewith to rotate in different directions. The rotating shaft 801 inserted into the inner ring of the gear 907 synchronizes the rotation of the gear 907. The correcting rod 802 fixedly connected to the outer ring of the rotating shaft 801 moves towards or away from each other, so that the distance between the two ends of the correcting rod 802 is adjusted, and the bottom of the correcting rod 802 contacts the belt body of the conveyor belt 3. The adjusted two correcting rods 802 facilitate the passage of PCB boards of different sizes. PCB boards of different sizes pass through the inside of the two correcting rods 802 to achieve self-adjustment. At the same time, when the PCB board is self-corrected by the correcting rod 802, the PCB board and the conveyor belt 3 move relative to each other. Under the limiting action of the limit convex point 4, the edge of the PCB board will directly support the limit convex point 4, so that the distance between each PCB board is the same, so that the placement position of the overall PCB board is unified, and the subsequent detection effect is better.

[0040] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A welding surface detection device based on machine vision detection, comprising a detection table (1), characterized in that: The detection platform (1) is provided with a notch (2) inside, and the notch (2) is connected to a conveyor belt (3) in a transmission manner, and a limit convex point (4) is provided on the conveyor belt (3), the side of the detection platform (1) is fixedly connected to a support plate (5), and a detection camera (6) is installed on the top of the support plate (5) through a mechanical arm, and the detection platform (1) is provided with a cavity (7) inside, and further comprises: A deviation correction component (8), wherein the interior of the cavity (7) is rotatably connected to a rotating shaft (801) via a bearing, and a deviation correction rod (802) is fixedly sleeved on the outer ring of the rotating shaft (801); The adjusting component (9) comprises a second rotating shaft (909) movably connected inside the detection platform (1), and a rotating handle (908) is fixedly connected to the top of the second rotating shaft (909), and the second rotating shaft (909) is movably connected to the rotating disk (901), and the rotating disk (901) and the movable block (902) are movably connected via a connecting rod (905), and a gear (907) is fixedly sleeved on the outer ring of the first rotating shaft (801), and the gear (907) is meshedly connected to the tooth plate (906), and the end of the tooth plate (906) is fixedly connected to the movable block (902).

2. A welding surface detection device based on machine vision detection according to claim 1, characterized in that: The limiting protrusions (4) are provided in a plurality, and the plurality of limiting protrusions (4) are distributed in a straight line at equal intervals, and the limiting protrusions (4) are made of silicone material.

3. The welding surface detection device based on machine vision detection according to claim 1 is characterized in that: The rotating disk (901) is composed of a disk 1 (9011), a disk 2 (9012), a short rod 1 (9013), a ring block (9014), a ring groove (9015) and a through hole (9016), wherein the disk 1 (9011) and the disk 2 (9012) are fixedly connected by the short rod 1 (9013), and a through hole (9016) is provided between the disk 1 (9011) and the disk 2 (9012). The diameter of the inner through hole (9016) of the first disk (9011) is smaller than the diameter of the inner through hole (9016) of the second disk (9012), and the through holes (9016) in the first disk (9011) and the second disk (9012) are interspersed with the second rotating shaft (909), and the second rotating shaft (909) does not contact the inner wall of the through hole (9016) inside the second disk (9012).

4. A welding surface detection device based on machine vision detection according to claim 3, characterized in that: The bottom of the second disk (9012) is provided with an annular groove (9015), and the annular groove (9015) is rotatably connected to the upper end of a ring block (9014) fixedly connected to the inner wall of the cavity (7).

5. The welding surface detection device based on machine vision detection according to claim 1, characterized in that: The movable block (902) is provided with a notch (903) at one end close to the rotating disk (901), and the inner wall of the notch (903) is fixedly connected with a second short rod (904), and the second short rod (904) and the first short rod (9013) penetrate the two ends of the connecting rod (905), and the second short rod (904) and the first short rod (9013) are rotatably connected to the through-holes at the two ends of the connecting rod (905) through bearings.

6. The welding surface detection device based on machine vision detection according to claim 1, characterized in that: The upper and lower ends of the movable block (902) are fixedly connected with protrusions (9021), and the protrusions (9021) move inside two symmetrically arranged upper and lower limit grooves (9022) arranged inside the detection platform (1), and the limit grooves (9022) are connected to the cavity (7).

7. The welding surface detection device based on machine vision detection according to claim 1 is characterized in that: The lower half of the second rotating shaft (909) is provided with a thread (9091), and the lower half of the second rotating shaft (909) is threadedly connected to a thread groove preset inside the detection platform (1).

8. The welding surface detection device based on machine vision detection according to claim 1, characterized in that: The upper part of the second rotating shaft (909) is provided with a groove (9092), and the groove (9092) is movably connected to a limiting rod (9093) fixedly connected to the inner wall of a through hole (9016) provided inside the first disk (9011).

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