Circuit board adjustable stable detection device

Abstract

The utility model discloses an adjustable stable detection device for a circuit board. The adjustable stable detection device comprises a main rack, a separated auxiliary rack, a pretreatment roller group, a stable feeding mechanism and a visual module, mounting positions are arranged in the main machine frame at intervals, the separated auxiliary machine frame is mounted in the mounting positions, the stable feeding mechanism comprises base frames arranged on the two sides in parallel, a clamping roller set, an elastic roller set, a limiting roller set and a first detection module, and the separated auxiliary machine frame and the main machine frame are arranged in a separated mode. The vibration on the main frame is not transmitted to the separated auxiliary frame, so that the image recognition is stably and effectively carried out; the circuit board with the corrected position and angle in the preprocessing roller set is clamped through the clamping roller set, and the distance between the roller sets is adjusted through the limiting roller set according to the thickness of the circuit board, so that the bending and deformation of the circuit board are reduced, the success rate of image recognition is increased, the stability of equipment is improved, and the shutdown maintenance time of the equipment is shortened.

Description

Technical Field

[0001] The utility model relates to the field of circuit board inspection equipment, in particular to an adjustable and stable circuit board detection device. Background Art

[0002] After the existing PCB is etched, it is necessary to use inspection equipment to automatically detect whether the surface quality of the PCB meets the standard. Usually, a vision module is used to take pictures of the PCB, and then the surface of the photographed PCB is checked through a vision recognition algorithm, so as to facilitate the automatic identification of PCB waste boards with unqualified quality; however, in the existing inspection equipment, both the feeding roller group and the imaging module are arranged on the same frame, and there are also equipment such as a loading mechanism and an unloading mechanism on the frame, making the vibration and shaking of the frame relatively large; furthermore, the current detection equipment does not have a smooth and stable transition in the motion control of the mechanical platform, and the collected pictures cannot restore the actual situation of the real board to the greatest extent, with large deformation; or an area array industrial camera is used for imaging, and it is necessary to take fragmentary pictures of several PCB boards, and only after image stitching through an algorithm can the recognition of the image content be started, resulting in image recognition failure and classifying good-quality PCB boards as bad boards. In addition, the roller groups in the existing circuit board detection equipment have a constant spacing, so that sometimes the thickness of the PCB board does not match the spacing of the roller groups. As a result, while the PCB board is being photographed, the PCB board is also entering the next roller group and leaving the previous roller group. Since the relative position between the roller group and the PCB board changes, the PCB board bends irregularly and unpredictably, and the slope of the PCB board in the photographing area continuously changes, resulting in compressed or stretched faults in the image, which also causes image recognition failure; due to the above two reasons, the stability of the existing PCB detection equipment is not high, and it needs to be shut down and debugged frequently. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide an adjustable and stable circuit board detection device to solve the above problems.

[0004] To solve the above technical problems, the technical solution of the present utility model is: an adjustable and stable detection device for a circuit board, including a main frame, a separable sub-frame, a pretreatment roller group, a stable feeding mechanism, and a vision module; installation positions are spaced inside the main frame, the separable sub-frame is installed in the installation positions, the pretreatment roller group is fixedly installed on the main frame, the stable feeding mechanism is arranged on the main frame, and the stable feeding mechanism is aligned with the position of the pretreatment roller group so that the circuit board enters the stable feeding mechanism horizontally from the pretreatment roller group; the vision module is arranged on the top of the separable sub-frame and faces the detection area in the stable feeding mechanism; the stable feeding mechanism includes base frames arranged in parallel on both sides, and also includes a clamping roller group, an elastic roller group, a limiting roller group, and a first detection module arranged between the base frames. A driving component for driving the rollers in the clamping roller group, the elastic roller group, and the limiting roller group to rotate is also arranged on the side surface of the base frame. The clamping roller group, the first detection module, the elastic roller group, and several limiting roller groups are arranged in sequence along the advancing direction of the circuit board; a detection area is formed between the clamping roller group and the elastic roller group.

[0005] Preferably, the clamping roller group includes a first limiting groove opened on the base frame, a first connecting plate, a first limiting hinge block, a second limiting hinge block, a first driving roller, a first abutting roller, and a lifting cylinder; first limiting hinge blocks are hingedly installed on both sides of the first driving roller, and second limiting hinge blocks are hingedly installed on both sides of the first abutting roller; the shapes of the first limiting hinge block and the second limiting hinge block are adapted to the shape of the first limiting groove and sequentially enter the first limiting groove. The first connecting plate is fixedly installed on the top of the base frame, and the lifting cylinders are symmetrically installed on the first connecting plate. The movable ends of the lifting cylinders pass through the first connecting plate and are fixedly connected to the second limiting hinge blocks.

[0006] Preferably, the first detection module is fixedly installed on one side of the first connecting plate close to the detection area.

[0007] Preferably, the elastic roller group includes a second limiting groove opened on the base frame, a third limiting hinge block, a fourth limiting hinge block, a second driving roller, a second abutting roller, a first pressure spring, and a top cover; third limiting hinge blocks are hingedly installed on both sides of the second driving roller, and fourth limiting hinge blocks are hingedly installed on both sides of the second abutting roller. The shapes of the third limiting hinge block and the fourth limiting hinge block are adapted to the shape of the second limiting groove; the third limiting hinge block and the fourth limiting hinge block sequentially enter the second limiting groove; the top cover is installed on the base frame and covers the opening of the second limiting groove, and the first pressure spring is arranged between the fourth limiting hinge block and the top cover.

[0008] Preferably, the limiting roller set includes a servo motor, a rotating shaft, a lifting plate, a third limiting groove formed in the base frame, a fifth limiting hinge block, a sixth limiting hinge block, a third driving roller, a third abutting roller, and a second pressure spring, which are installed on the separable auxiliary frame; a first protrusion is formed by outward extension of the bottom of the lifting plate, and a fourth limiting groove is formed in the first protrusion; a second protrusion is formed by outward extension of the side surface of the sixth limiting hinge block, and the shape of the second protrusion is adapted to the shapes of the first protrusion and the fourth limiting groove; the two sides of the third driving roller are hingedly installed with fifth limiting hinge blocks; the two sides of the third abutting roller are hingedly installed with sixth limiting hinge blocks, and the shapes of the fifth limiting hinge block and the sixth limiting hinge block are adapted to the structure of the third limiting groove, and the fifth limiting hinge block and the sixth limiting hinge block successively enter the third limiting groove; the top cover is installed on the base frame and covers the opening of the third limiting groove, and the second pressure spring is arranged between the sixth limiting hinge block and the top cover.

[0009] Preferably, the separable auxiliary frame includes vertical frames, support frames, a top plate, a bottom plate, rib plates, and support feet; the vertical frames are symmetrically arranged, the top plate and the bottom plate are respectively fixedly installed at the top and the bottom of the vertical frames, the support frames are fixedly installed between the vertical frames, and the rib plates are fixedly installed between the vertical frames and the top plate and between the vertical frames and the bottom plate; the support feet are fixedly installed at the bottom of the bottom plate, and the vision module is fixedly installed on the bottom plate of the top plate.

[0010] Preferably, a second connecting plate is further arranged at the bottom of the base frame, and a supplementary light module is fixedly installed on the second connecting plate, and the supplementary light module faces the vision module.

[0011] Preferably, the pretreatment roller set includes a plurality of feeding rollers arranged at intervals, clamping and limiting clamping plates, and an opposing clamping driving assembly; the feeding rollers are arranged on the main frame, and the opposing clamping driving assembly is arranged below the feeding rollers; the clamping and limiting clamping plates are fixedly installed on the movable ends of the opposing clamping driving assembly, and the clamping and limiting clamping plates extend towards the gap between the feeding rollers to form abutting portions.

[0012] Preferably, a first hinge seat is arranged on the support frame, and a supplementary light module is hingedly installed on the first hinge seat. A second hinge seat is fixedly installed on the top, and the vision module is hingedly installed on the second hinge seat. The supplementary light module faces the detection area, and the vision module is on the reflected extension line of the light of the supplementary light module in the detection area.

[0013] Preferably, an elastic member is fixedly installed between the first limiting hinge block and the second limiting hinge block.

[0014] The technical effects of the present utility model are mainly reflected as follows: by separating the detachable sub-frame from the main frame, the vibration on the main frame will not be transmitted to the detachable sub-frame, effectively reducing the vibration during the image recognition process, and enabling the image recognition to be carried out stably and effectively; by using the clamping roller group to clamp the circuit board whose position and angle are corrected in the preprocessing roller group, and then feeding the circuit board into the elastic roller group, the elastic roller group flexibly clamps one end of the circuit board, reducing the bending and deformation of the circuit board. At this time, the limiting roller group adjusts the distance between the rollers according to the thickness of the circuit board, so that after the circuit board enters the limiting roller group, it can leave the clamping roller group and the elastic roller group smoothly, and can also avoid the circuit board from bending and deforming, thereby improving the success rate of image recognition and providing the stability of the equipment, and reducing the time for equipment shutdown and maintenance; precise control of the equipment movement and strict control of the vibration of the image acquisition module are achieved, so that during the continuous image acquisition process of the image acquisition module, the control error is within 0.01 MM, the restored degree of the acquired image is extremely high, the complexity of the algorithm is greatly reduced, and thus the detection speed and accuracy are greatly improved. Brief Description of the Drawings

[0015] Figure 1 It is the front view of Embodiment 1;

[0016] Figure 2 It is the right view of the detachable sub-frame and the stable feeding mechanism;

[0017] Figure 3 It is the front view sectional view of the detachable sub-frame and the stable feeding mechanism;

[0018] Figure 4 It is for Figure 3 The enlarged view of part A in

[0019] Figure 5 It is the right view sectional view of the limiting roller group;

[0020] Figure 6 It is the right view sectional view of the clamping roller group;

[0021] Figure 7 It is the rear view of Embodiment 1;

[0022] Figure 8 It is for Figure 1 The enlarged view of part B in

[0023] Figure 9 It is the front view of Embodiment 2.

[0024] The reference numerals are as follows: 1 - main frame, 11 - installation position, 2 - separable sub-frame, 21 - vertical frame, 22 - support frame, 221 - first hinge seat, 23 - top plate, 231 - second hinge seat, 24 - bottom plate, 25 - rib plate, 26 - support foot, 3 - pretreatment roller group, 31 - feeding roller, 32 - clamping and limiting clamping plate, 33 - opposite clamping drive assembly, 4 - stable feeding mechanism, 41 - base frame, 42 - clamping roller group, 421 - first limiting groove, 422 - first connecting plate, 423 - first limiting hinge block, 424 - second limiting hinge block, 425 - first driving roller 426 - first abutting roller, 427 - lifting cylinder, 43 - elastic roller group, 431 - second limiting groove, 432 - third limiting hinge block, 433 - fourth limiting hinge block, 434 - second driving roller, 435 - second abutting roller, 436 - first pressure spring, 437 - top cover, 44 - limiting roller group, 441 - servo motor, 442 - rotating shaft, 443 - lifting plate, 4431 - first convex part, 4432 - fourth limiting groove, 444 - third limiting groove, 445 - fifth limiting hinge block, 446 - sixth limiting hinge block, 4461 - second convex part, 447 - third driving roller 448 - third abutting roller, 449 - second pressure spring, 45 - first detection module, 46 - drive assembly, 47 - second connecting plate, 48 - supplementary light module, 5 - vision module, 6 - detection area, 7 - elastic member. Detailed Description of the Specific Embodiment

[0025] The following combines with the drawings to detail the specific embodiment of the present invention as a preference, so that the technical solution of the present invention is easier to understand and master.

[0026] In this embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right side", "left end", "above", "back", "middle part", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention, 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, so it cannot be understood as a limitation to the present invention.

[0027] In addition, in this specific embodiment, if there is no special description of the connection or fixing method between components, the connection or fixing method can be bolt fixing or pin fixing commonly used in the prior art, or pin shaft connection and other methods. Therefore, it will not be elaborated in this embodiment.

[0028] Embodiment 1

[0029] This embodiment provides a circuit board adjustable and stable detection device, as Figures 1-8As shown in the figure, it includes a main frame 1, a separable sub-frame 2, a pre-treatment roller group 3, a stable feeding mechanism 4, and a vision module 5. Installation positions 11 are arranged at intervals inside the main frame 1. The separable sub-frame 2 is installed inside the installation positions 11. The pre-treatment roller group 3 is fixedly installed on the main frame 1. The pre-treatment roller group 3 is used to reduce the deflection angle of the circuit board in the forward direction and correct the lateral displacement of the circuit board, so that the circuit board can be directly below the vision module 5 after entering the stable feeding mechanism 4. The stable feeding mechanism 4 is arranged on the main frame 1 and is separated from the main frame 1 through the separable sub-frame 2, so that the vibration on the main frame 1 will not be transmitted to the separable sub-frame 2, effectively reducing the vibration during the image recognition process and enabling the image recognition to be carried out stably and effectively. The stable feeding mechanism 4 is aligned with the position of the pre-treatment roller group 3, so that the circuit board enters the stable feeding mechanism 4 horizontally from the pre-treatment roller group 3. The vision module 5 is arranged at the top of the separable sub-frame 2 and faces the detection area 6 in the stable feeding mechanism 4. When the circuit board enters the detection area 6, the vision module 5 starts to continuously take pictures of the circuit board until the circuit board leaves the detection area 6. The stable feeding mechanism 4 includes base frames 41 arranged in parallel on both sides, and also includes a clamping roller group 42, an elastic roller group 43, a limiting roller group 44, and a first detection module 45 arranged between the base frames 41. A driving assembly 46 for driving the rollers in the clamping roller group 42, the elastic roller group 43, and the limiting roller group 44 to rotate is also arranged on the side of the base frame 41. The clamping roller group 42, the first detection module 45, the elastic roller group 43, and several limiting roller groups 44 are arranged in sequence along the forward direction of the circuit board. A detection area 6 is formed between the clamping roller group 42 and the elastic roller group 43. The circuit board with corrected position and angle in the pre-treatment roller group 3 is clamped by the clamping roller group 42, and then the circuit board is advanced into the elastic roller group 43. The elastic roller group 43 is used to flexibly clamp one end of the circuit board, so that the bending and deformation amount of the circuit board become smaller. At this time, the limiting roller group 44 adjusts the distance between the roller groups according to the thickness of the circuit board, so that after the circuit board enters the limiting roller group 44, it can smoothly leave the clamping roller group 42 and the elastic roller group 43, and can also prevent the circuit board from bending and deforming, thereby improving the success rate of image recognition and providing the stability of the equipment, and reducing the time for equipment shutdown and maintenance.

[0030] Preferably, the clamping roller set 42 includes a first limiting groove 421 formed in the base frame 41, a first connecting plate 422, a first limiting hinge block 423, a second limiting hinge block 424, a first driving roller 425, a first abutting roller 426, and a lifting cylinder 427; both sides of the first driving roller 425 are hingedly installed with the first limiting hinge block 423, and both sides of the first abutting roller 426 are hingedly installed with the second limiting hinge block 424; the shapes of the first limiting hinge block 423 and the second limiting hinge block 424 are adapted to the shape of the first limiting groove 421 and sequentially enter the first limiting groove 421. The first connecting plate 422 is fixedly installed on the top of the base frame 41, the lifting cylinders 427 are symmetrically installed on the first connecting plate 422, and the movable ends of the lifting cylinders 427 pass through the first connecting plate 422 and are fixedly connected to the second limiting hinge block 424. By introducing air into the lifting cylinders 427, the movable ends of the lifting cylinders 427 are extended, thereby pushing the first abutting roller 426 close to the first driving roller 425, thereby realizing flexible clamping of the circuit board, and ensuring that when the circuit board passes through the detection area 6, the forward speed of the circuit board is consistent with the tangential speed on the circumference of the first driving roller 425, so that the forward speed of the circuit board remains uniform.

[0031] Preferably, an elastic member 7 is fixedly installed between the first limiting hinge block 423 and the second limiting hinge block 424. The elastic member 7 provides appropriate supporting force for the first limiting hinge block 423 and the second limiting hinge block 424, making it easier for the circuit board to enter between the first driving roller 425 and the first abutting roller 426, and improving the stability when collecting images after the circuit board enters the detection area 6.

[0032] Preferably, the first detection module 45 is fixedly installed on one side of the first connecting plate 422 close to the detection area 6. When the preprocessing roller set 3 feeds the circuit board between the first driving roller 425 and the first abutting roller 426 and the first detection module 45 detects the circuit board, it is convenient to drive the lifting cylinder 427 to clamp the circuit board; when the first detection module 45 does not detect the circuit board, the lifting cylinder 427 is driven to retract the first abutting roller 426.

[0033] Preferably, the elastic roller set 43 includes a second limiting groove 431 formed in the base frame 41, a third limiting hinge block 432, a fourth limiting hinge block 433, a second driving roller 434, a second abutting roller 435, a first compression spring 436 and a top cover 437; both sides of the second driving roller 434 are hingedly installed with the third limiting hinge block 432, both sides of the second abutting roller 435 are hingedly installed with the fourth limiting hinge block 433, and the shapes of the third limiting hinge block and the fourth limiting hinge block 433 are adapted to the shape of the second limiting groove 431; the third limiting hinge block 432 and the fourth limiting hinge block 433 sequentially enter the second limiting groove 431; the top cover 437 is installed on the base frame 41 and covers the opening of the second limiting groove 431, and the first compression spring 436 is arranged between the fourth limiting hinge block 433 and the top cover 437, and the first compression spring 436 provides a downward pressure for the second abutting roller 435, so that the second abutting roller 435 continuously abuts against the second driving roller 434. When the circuit board enters between the second driving roller 434 and the second abutting roller 435, the circuit board pushes the second abutting roller 435 upward, so that the circuit board is abutted by the first driving roller 425 and the second abutting roller 435.

[0034] Preferably, the limiting roller group 44 includes a servo motor 441, a rotating shaft 442, a lifting plate 443, a third limiting groove 444 formed in the base frame 41, a fifth limiting hinge block 445, a sixth limiting hinge block 446, a third driving roller 447, a third abutting roller 448, and a second pressure spring 449, which are mounted on the separable secondary frame 2. A first protruding portion 4431 extends outward from the bottom of the lifting plate 443, and a fourth limiting groove 4432 is formed in the first protruding portion 4431. A second protruding portion 4461 extends outward from the side surface of the sixth limiting hinge block 446, and the shape of the second protruding portion 4461 is adapted to the shapes of the first protruding portion 4431 and the fourth limiting groove 4432. External threads are formed on the rotating shaft 442, and a threaded hole is formed in the lifting plate 443. The threaded hole corresponds to the external threads of the rotating shaft 442. The rotating shaft 442 passes through the threaded hole and is fixedly installed on the output shaft of the servo motor 441. By rotating the servo motor 441, the rotating shaft 442 rotates, and the lifting plate 443 realizes a lifting movement due to the threaded hole. When the lifting plate 443 rises, the sixth limiting hinge block 446 rises together with the lifting plate 443 due to the abutment between the first protruding portion 4431 and the second protruding portion 4461. When the sixth limiting hinge block 446 and the third abutting roller 448 are subjected to an upward thrust, the second protruding portion 4461 slides upward through the fourth limiting groove 4432. The fifth limiting hinge blocks 445 are hingedly installed on both sides of the third driving roller 447. The sixth limiting hinge blocks 446 are hingedly installed on both sides of the third abutting roller 448. The shapes of the fifth limiting hinge block 445 and the sixth limiting hinge block 446 are adapted to the structure of the third limiting groove 444. The fifth limiting hinge block 445 and the sixth limiting hinge block 446 sequentially enter the third limiting groove 444. The top cover 437 is installed on the base frame 41 and covers the opening of the third limiting groove 444. The second pressure spring 449 is disposed between the sixth limiting hinge block 446 and the top cover 437. By rotating the servo motor 441, the lifting movements of the lifting plate 443, the sixth limiting hinge block 446, and the third abutting roller 448 are realized, so as to correspond to the thickness of the circuit board. The second pressure spring 449 provides a downward pressure for the third abutting roller 448, so that the third abutting roller 448 is in flexible abutment with the circuit board.

[0035] Preferably, the separable sub-frame 2 includes a vertical frame 21, a support frame 22, a top plate 23, a bottom plate 24, a rib plate 25 and a support foot 26; the vertical frames 21 are symmetrically arranged, the top plate 23 and the bottom plate 24 are respectively fixedly installed at the top and bottom of the vertical frame 21, the support frame 22 is fixedly installed between the vertical frames 21, and the rib plates 25 are fixedly installed between the vertical frame 21 and the top plate 23 and between the vertical frame 21 and the bottom plate 24; the support foot 26 is fixedly installed at the bottom of the bottom plate 24, and the vision module 5 is fixedly installed on the bottom plate 24 of the top plate 23.

[0036] Preferably, a second connecting plate 47 is further provided at the bottom of the base frame 41, and a light supplement module 48 is fixedly installed on the second connecting plate 47. The light supplement module 48 faces the vision module 5. By irradiating the circuit board through the light supplement module 48, the light and dark contrast between the etched parts on the circuit board and the background is increased, and the success rate of image recognition is improved.

[0037] Preferably, the pretreatment roller group 3 includes a plurality of feeding rollers 31 arranged at intervals, clamping and limiting clamping plates 32 and an oppositely clamping driving assembly 33; the feeding rollers 31 are arranged on the main frame 1, and the oppositely clamping driving assembly 33 is arranged below the feeding rollers 31; the clamping and limiting clamping plates 32 are fixedly installed on the movable ends of the oppositely clamping driving assembly 33, and the clamping and limiting clamping plates 32 extend towards the gap between the feeding rollers 31 to form an abutting portion. By driving the clamping and limiting clamping plates 32 to perform bidirectional clamping on the PCB board longitudinally through the oppositely clamping driving assembly 33, the side surface of the PCB board is parallel to the advancing direction, and the longitudinal offset generated during the conveying process of the PCB board can also be eliminated.

[0038] Embodiment 2

[0039] In this embodiment, as Figure 9 shown, a first hinge seat 221 is provided on the support frame 22, and a light supplement module 48 is hingedly installed on the first hinge seat 221. A second hinge seat 231 is fixedly installed on the top 23, and the vision module 5 is hingedly installed on the second hinge seat 231. The light supplement module 48 faces the detection area 6, and the vision module 5 faces the reflected extension line of the light of the light supplement module 48 on the detection area 6; by correspondingly adjusting the angles of the light supplement module 48 and the vision module 5 through the first hinge seat 221 and the second hinge seat 231, more light is irradiated onto the detection area 6, and the vision module 5 receives more light, which is convenient for improving the success rate of the vision module 5 in performing graphic recognition.

[0040] The technical effects of the present utility model are mainly reflected as follows: By setting the detachable sub-frame separately from the main frame, the vibration on the main frame will not be transmitted to the detachable sub-frame, effectively reducing the vibration during the image recognition process and enabling stable and effective image recognition; The circuit board with corrected position and angle in the pretreatment roller group is clamped by the clamping roller group, and then the circuit board is advanced into the elastic roller group. The elastic roller group flexibly clamps one end of the circuit board, reducing the bending and deformation of the circuit board. At this time, the spacing of the roller group is adjusted by the limiting roller group according to the thickness of the circuit board, so that after the circuit board enters the limiting roller group, it can leave the clamping roller group and the elastic roller group smoothly, and the circuit board can also be prevented from bending and deforming, thereby improving the success rate of image recognition and providing the stability of the equipment, and reducing the time for equipment shutdown and maintenance; Precise control of the equipment movement and strict control of the vibration of the image acquisition module are achieved, so that during the continuous image acquisition process of the image acquisition module, the control error is within 0.01 MM, the restored degree of the acquired image is extremely high, the complexity of the algorithm is greatly reduced, and thus the detection speed and accuracy are greatly improved.

[0041] Of course, the above are only typical examples of the present utility model. In addition, the present utility model can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present utility model.

Claims

1. An adjustable and stable detection device for a circuit board, characterized in that, It includes a main frame, a separable sub-frame, a pre-treatment roller group, a stable feeding mechanism, and a vision module; installation positions are arranged at intervals within the main frame, the separable sub-frame is installed within the installation positions, the pre-treatment roller group is fixedly installed on the main frame, the stable feeding mechanism is arranged on the main frame, and the positions of the stable feeding mechanism and the pre-treatment roller group are aligned so that the circuit board enters the stable feeding mechanism horizontally from the pre-treatment roller group; the vision module is arranged at the top of the separable sub-frame and faces the detection area in the stable feeding mechanism; the stable feeding mechanism includes base frames arranged in parallel on both sides, and also includes a clamping roller group, an elastic roller group, a limiting roller group, and a first detection module arranged between the base frames. A driving component for driving the rollers in the clamping roller group, the elastic roller group, and the limiting roller group to rotate is also arranged on the side surface of the base frame. The clamping roller group, the first detection module, the elastic roller group, and several limiting roller groups are arranged in sequence along the advancing direction of the circuit board; a detection area is formed between the clamping roller group and the elastic roller group.

2. The adjustable and stable detection device for a circuit board according to claim 1, characterized in that, The clamping roller group includes a first limiting groove opened on the base frame, a first connecting plate, a first limiting hinge block, a second limiting hinge block, a first driving roller, a first abutting roller, and a lifting cylinder; the two sides of the first driving roller are hingedly installed with the first limiting hinge block, and the two sides of the first abutting roller are hingedly installed with the second limiting hinge block; the shapes of the first limiting hinge block and the second limiting hinge block are adapted to the shape of the first limiting groove and sequentially enter the first limiting groove. The first connecting plate is fixedly installed on the top of the base frame, the lifting cylinders are symmetrically installed on the first connecting plate, and the movable ends of the lifting cylinders pass through the first connecting plate and are fixedly connected to the second limiting hinge block.

3. The adjustable and stable detection device for a circuit board according to claim 2, characterized in that, The first detection module is fixedly installed on one side of the first connecting plate close to the detection area.

4. An adjustable and stable detection device for a circuit board according to claim 1, characterized in that, The elastic roller group includes a second limiting groove opened on the base frame, a third limiting hinge block, a fourth limiting hinge block, a second driving roller, a second abutting roller, a first pressure spring, and a top cover; the two sides of the second driving roller are hingedly installed with the third limiting hinge block, and the two sides of the second abutting roller are hingedly installed with the fourth limiting hinge block. The shapes of the third limiting hinge block and the fourth limiting hinge block are adapted to the shape of the second limiting groove; the third limiting hinge block and the fourth limiting hinge block sequentially enter the second limiting groove; the top cover is installed on the base frame and covers the opening of the second limiting groove, and the first pressure spring is arranged between the fourth limiting hinge block and the top cover.

5. The adjustable and stable detection device for a circuit board according to claim 4, wherein The limiting roller set includes a servo motor, a rotating shaft, a lifting plate, a third limiting groove formed in the base frame, a fifth limiting hinge block, a sixth limiting hinge block, a third driving roller, a third abutting roller, and a second compression spring, which are installed on the split sub-frame; a first protruding portion extends outward from the bottom of the lifting plate, and a fourth limiting groove is formed in the first protruding portion; a second protruding portion extends outward from the side surface of the sixth limiting hinge block, and the shape of the second protruding portion is adapted to the shapes of the first protruding portion and the fourth limiting groove; fifth limiting hinge blocks are hingedly installed on both sides of the third driving roller; sixth limiting hinge blocks are hingedly installed on both sides of the third abutting roller, and the shapes of the fifth limiting hinge block and the sixth limiting hinge block are adapted to the structure of the third limiting groove, and the fifth limiting hinge block and the sixth limiting hinge block sequentially enter the third limiting groove; the top cover is installed on the base frame and covers the opening of the third limiting groove, and the second compression spring is arranged between the sixth limiting hinge block and the top cover.

6. The adjustable and stable detection device for a circuit board according to claim 1, characterized in that The split sub-frame includes a vertical frame, a support frame, a top plate, a bottom plate, a rib plate, and a support foot; the vertical frames are symmetrically arranged, the top plate and the bottom plate are respectively fixedly installed on the top and the bottom of the vertical frame, the support frame is fixedly installed between the vertical frames, and the rib plate is fixedly installed between the vertical frame and the top plate and between the vertical frame and the bottom plate; the support foot is fixedly installed at the bottom of the bottom plate, and the vision module is fixedly installed on the bottom plate of the top plate.

7. The adjustable and stable detection device for a circuit board according to claim 6, wherein, A second connecting plate is further arranged at the bottom of the base frame, and a supplementary light module is fixedly installed on the second connecting plate, and the supplementary light module faces the vision module.

8. An adjustable and stable detection device for a circuit board according to claim 1, characterized in that, The pretreatment roller set includes a plurality of feeding rollers arranged at intervals, clamping and limiting clamping plates, and an opposing clamping driving assembly; the feeding rollers are arranged on the main frame, and the opposing clamping driving assembly is arranged below the feeding rollers; the clamping and limiting clamping plates are fixedly installed on the movable ends of the opposing clamping driving assembly, and the clamping and limiting clamping plates extend toward the gap between the feeding rollers to form an abutting portion.

9. The adjustable and stable detection device for a circuit board according to claim 6, characterized in that, A first hinge seat is arranged on the support frame, and a supplementary light module is hingedly installed on the first hinge seat. A second hinge seat is fixedly installed on the top, and the vision module is hingedly installed on the second hinge seat. The supplementary light module faces the detection area, and the vision module is on the reflected extension line of the light of the supplementary light module in the detection area.

10. An adjustable and stable detection device for a circuit board according to claim 2, characterized in that, An elastic member is fixedly installed between the first limiting hinge block and the second limiting hinge block.

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