A visual-based automatic adjusting device for bonding seams of silicon rods

Abstract

This invention discloses a vision-based automatic adjustment device for the splicing seam of bonded silicon rods, relating to the field of silicon rod production technology. The device includes: a frame, a silicon rod bonding fixture, a vision camera, a light source support, a positioning seat, a silicon rod positioning block, and a splicing top block. This invention completes the positioning and splicing work during the silicon rod docking process by using information acquired by a vision camera in conjunction with a mechanical structure to drive the splicing, achieving automated continuous processing of silicon rods. Furthermore, by using upper and lower light sources to illuminate the splicing seam from two directions, the alignment accuracy during the silicon rod splicing process is improved. By setting up two sets of vision cameras to detect the areas on both sides of the splicing seam, the accuracy of the splicing seam is further improved, meeting the current demands of intelligent manufacturing for automation and high precision.

Description

Technical Field

[0001] This invention relates to the field of silicon rod production technology, and in particular to a vision-based automatic adjustment device for the bonding seams of silicon rods. Background Technology

[0002] Silicon rods are a fundamental material in the photovoltaic and semiconductor industries. During their processing, multiple short silicon rods are often bonded and spliced ​​together to form a longer rod to meet the requirements of subsequent slicing processes. The quality of the splice directly determines the yield and quality of the wafers. Current technologies for bonding and aligning silicon rods mainly suffer from the following defects:

[0003] Low alignment accuracy and reliance on manual experience: Existing methods mostly rely on operators to align the seams by eye or with the help of simple optical magnification equipment. This method is highly subjective, the alignment accuracy cannot be guaranteed, and it is easy to cause problems such as axial misalignment and angular deviation in the seams, which seriously affects the splicing quality. The repeatability and consistency of manual operation are poor, which makes it difficult to meet the needs of modern intelligent manufacturing.

[0004] Lack of stable and reliable benchmarks: Some existing automated vision alignment schemes usually use the edge of the silicon rod itself as the alignment benchmark. However, the edge of the silicon rod may have chipping, scratches or contamination. These defects can seriously interfere with the recognition of the vision system, resulting in unstable alignment benchmarks and systematic errors.

[0005] Limited inspection dimensions make it impossible to comprehensively assess seam quality: Existing visual inspection methods are often limited, such as using only top lighting. This method is difficult to detect all critical defects in the seam simultaneously and efficiently. It may not be able to effectively distinguish between misalignment in the height direction (Z direction) and non-parallelism of the end face (angle), nor can it quantitatively measure the size of the seam gap. This results in incomplete quality inspection results and a high risk of defective products flowing into the next process.

[0006] Therefore, there is an urgent need in this field for a silicon rod vision alignment and adjustment device that can achieve automated, high-precision, full-dimensional detection and is independent of the quality of the silicon rod edge. Therefore, it is necessary to invent a vision-based automatic adjustment device for the bonding seams of bonded silicon rods to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a vision-based automatic adjustment device for the splicing seams of adhesive rods and silicone rods, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a vision-based automatic adjustment device for the seam of adhesive rod / silicon rod bonding, comprising:

[0009] The frame contains a silicon rod tooling conveyor line.

[0010] A silicon rod bonding fixture is located above a silicon rod conveyor line. Two silicon rods to be bonded are positioned above the silicon rod bonding fixture, and a seam is provided between the two silicon rods to be bonded.

[0011] The device has two vision cameras, both of which are located above the frame. The two vision cameras are located on both sides of the silicon rod bonding fixture.

[0012] Two light source brackets are provided and are respectively located on the outside of two vision cameras. The two light source brackets are respectively provided with an upper light source and a lower light source at both ends. The upper light source is used to illuminate the seam to assist the vision camera in obtaining the seam status.

[0013] The positioning seat is fixedly disposed in the middle of the upper surface of the silicon rod bonding fixture. When the positioning seat is illuminated by the light emitted by the lower light source, it produces a strip shadow. The silicon rod to be bonded is positioned with the strip shadow as the reference surface.

[0014] A silicon rod positioning block is slidably disposed above the frame. The silicon rod positioning block is used to adjust one end of a silicon rod to be bonded to be in contact with the reference surface and to support the silicon rod to be bonded.

[0015] A splicing top block, which is slidably disposed above the frame, is used to push another silicon rod to be bonded so that the two silicon rods to be bonded are spliced ​​together.

[0016] Preferably, the first telescopic cylinder is located above the frame and its output end is fixedly connected to the middle of the silicon rod positioning block. A fixed bracket is fixedly provided on the outer side of the first telescopic cylinder and the fixed bracket is fixedly located above the frame. The first telescopic cylinder is used to adjust the position of the silicon rod positioning block.

[0017] The second telescopic cylinder is located above the frame and its output end is fixedly connected to the middle of the splicing top block. Below the second telescopic cylinder is a lifting cylinder, which is fixedly located above the frame and its output end is fixedly connected to the middle of the bottom end of the second telescopic cylinder. The lifting cylinder is used to drive the second telescopic cylinder and the splicing top block to move up and down to ensure that the silicon rod bonding fixture can slide above the silicon rod fixture conveyor line.

[0018] Preferably, the light guide plate is fixedly mounted at the top center of the positioning seat;

[0019] A light guide groove, which runs through the middle of the light guide plate and is designed as a strip structure, forms a shadow area on the outer side of the silicon rod to be bonded after the light emitted by the lower light source shines on the light guide plate. After passing through the light guide groove, some light forms an illuminated area at the seam of the two silicon rods to be bonded so that the vision camera can obtain the seam details.

[0020] Preferably, the LED light strip has two sets, which are respectively fixed inside the upper light source and the lower light source;

[0021] The light-blocking plates are provided in two sets and are respectively located on the outside of the two sets of LED light strips. Each set of light-blocking plates has two symmetrical plates, which limit the illumination range of the light emitted by the LED light strips to avoid illuminating the area outside the silicon rod to be bonded and interfering with the visual camera in obtaining the splicing status.

[0022] Preferably, each of the two light-blocking plates has a support block rotatably mounted on both ends of its opposite side via a pin, and the support block is fixed to one end of the LED light strip. Each of the two light-blocking plates has a movable arm rotatably mounted on its opposite side via a pin, and a transmission arm rotatably mounted between the two movable arms via a pin. A lead screw sleeve is fixedly mounted in the middle of the transmission arm, and an adjusting lead screw is rotatably mounted in the middle of the lead screw sleeve. An adjusting motor is mounted at one end of the adjusting lead screw, and the adjusting motor is fixed to one end of the LED light strip. The two light-blocking plates can rotate relative to each other to adjust the illumination width of the LED light strip, thereby achieving local illumination of the seam and improving the focusing speed of the visual camera when shooting the local area of ​​the seam.

[0023] Preferably, the support plate is fixedly disposed on the side of the upper light source away from the silicon rod to be bonded and is rotatably disposed on the top of the light source bracket;

[0024] An angle-adjusting motor is fixedly mounted on the top of the light source bracket, and its output shaft is fixedly connected to the middle of the support plate. The angle-adjusting motor drives the support plate to rotate to adjust the angle of the upper light source so that the local area of ​​the seam is illuminated.

[0025] Preferably, a groove is provided on the upper surface of the silicon rod bonding fixture, and both silicon rods to be bonded are slidably disposed inside the groove, the groove being used to ensure that the two silicon rods to be bonded slide horizontally.

[0026] Preferably, the upper surface of the silicon rod tooling conveyor line is provided with a positioning groove for positioning the silicon rod bonding tooling.

[0027] Preferably, the two sets of vision cameras are symmetrically arranged, and the two sets of vision cameras are used to detect the seams on both sides of the silicon rod to be bonded.

[0028] Preferably, there are two sets of camera slide rails and camera slide tables. The two sets of camera slide rails are fixedly mounted on the top of the frame, and the two sets of camera slide tables are respectively fixedly mounted on the bottom of the two vision cameras. The two sets of camera slide tables are slidably mounted above the two sets of camera slide rails. The camera slide rails and camera slide tables are used to drive the vision cameras to slide in order to assist the vision cameras in focusing.

[0029] The technical effects and advantages of this invention are as follows:

[0030] 1. This invention completes the positioning and splicing work in the silicon rod docking process by using a vision camera to acquire information and a mechanical structure to drive the splicing, realizing the automated continuous processing of silicon rods. Furthermore, by using an upper light source and a lower light source to illuminate the seam from two directions, the alignment accuracy of the silicon rod splicing process is improved. By setting two sets of vision cameras to detect the areas on both sides of the seam, the accuracy of the seam is further improved, meeting the current intelligent manufacturing requirements for automation and high precision.

[0031] 2. This invention achieves visual positioning during the silicon rod splicing process by combining monitoring with monitoring using an upper light source and positioning with positioning using a lower light source to create a reference surface. The light emitted from the lower light source is projected after passing through the positioning seat to form a striped shadow area as a reference surface, which avoids the influence of silicon rod defects on the alignment of the silicon rod, fundamentally solves the problem of unstable alignment reference, and further improves the accuracy of silicon rod bonding and docking.

[0032] 3. This invention uses a rotatable upper light source to illuminate the seam. During the splicing process, the seam is partially illuminated, which facilitates the visual camera to capture the details of the seam, ensuring that the two silicon rods reach the qualified splicing pressure. Furthermore, the upper light source has two rotatable light guide plates inside, which can control the light output range of the upper light source. After splicing is completed, the two light guide plates can be moved away from each other so that the upper light source illuminates the entire seam, thereby capturing the overall state of the seam and ensuring the splicing accuracy of the silicon rods. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2 This is a top view of the overall structure of the present invention.

[0035] Figure 3 This is a schematic diagram of the visual camera structure of the present invention.

[0036] Figure 4 This is a schematic diagram of the silicon rod bonding fixture structure of the present invention.

[0037] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0038] Figure 6 This is a schematic diagram of the upper light source structure of the present invention.

[0039] Figure 7 This is a cross-sectional schematic diagram of the upper light source structure of the present invention.

[0040] Figure 8This is a schematic diagram of the light guide plate structure of the present invention.

[0041] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point B.

[0042] Figure 10 This is a schematic diagram showing the shooting range of the visual camera and the illumination range of the upper and lower light sources of the present invention.

[0043] Figure 11 This is a schematic diagram of the projection range of the positioning seat after the lower light source illuminates it according to the present invention.

[0044] Figure 12 This is a schematic diagram showing the projection range and seam position of the positioning seat after the lower light source illuminates it according to the present invention.

[0045] In the diagram: 1. Frame; 11. Silicon rod tooling conveyor line; 2. Silicon rod bonding tooling; 21. Slide groove; 3. Vision camera; 31. Camera slide rail; 32. Camera slide table; 4. Light source bracket; 41. Upper light source; 42. Lower light source; 43. Positioning seat; 411. Support plate; 412. Angle adjustment motor; 413. LED light strip; 414. Light blocking plate; 415. Support block; 416. Movable arm; 417. Transmission arm; 418. Lead screw sleeve; 419. Adjusting lead screw; 4191. Adjusting motor; 431. Light guide plate; 432. Light guide groove; 5. Silicon rod positioning block; 51. First telescopic cylinder; 52. Fixed bracket; 6. Splicing top block; 61. Second telescopic cylinder; 62. Lifting cylinder; 7. Silicon rod to be bonded; 8. Splicing seam. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] like Figures 1 to 12 As shown, the present invention provides a vision-based automatic adjustment device for the bonding seam of adhesive silicon rods. Essentially, this device uses a vision camera 3 to acquire information and coordinates with a mechanical structure to complete the positioning and bonding work during the silicon rod docking process. By employing an upper light source 41 and a lower light source 42 in combination, the seam 8 is illuminated from two directions to improve the alignment accuracy during the silicon rod bonding process. Furthermore, by setting two sets of vision cameras 3 to detect the areas on both sides of the seam 8, the precision of the seam is further improved, meeting the current demands of intelligent manufacturing for automation and high precision.

[0048] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0049] In this embodiment, a vision-based automatic adjustment device for bonding seams of silicone rods includes:

[0050] The frame 1 has a silicon rod tooling conveyor line 11 inside.

[0051] Silicon rod bonding fixture 2 is located above silicon rod bonding fixture conveyor line 11. Two silicon rods 7 to be bonded are located above silicon rod bonding fixture 2. A seam 8 is provided between the two silicon rods 7 to be bonded. The upper surface of silicon rod bonding fixture conveyor line 11 is provided with a positioning groove for positioning silicon rod bonding fixture 2.

[0052] The slide groove 21 is located on the upper surface of the silicon rod bonding fixture 2. Both silicon rods 7 to be bonded are slidably located inside the slide groove 21. The slide groove 21 is used to ensure that the two silicon rods 7 to be bonded slide horizontally.

[0053] Two vision cameras 3 are provided and are both located above the frame 1. The two vision cameras 3 are located on both sides of the silicon rod bonding fixture 2. The two sets of vision cameras 3 are symmetrically arranged and are used to detect the seam 8 on both sides of the silicon rod 7 to be bonded.

[0054] The camera slide rail 31 and camera slide table 32 are provided in two sets. The two sets of camera slide rails 31 are fixedly installed on the top of the frame 1. The two sets of camera slide tables 32 are respectively fixed at the bottom of the two vision cameras 3. The two sets of camera slide tables 32 are slidably installed above the two sets of camera slide rails 31. The camera slide rails 31 and camera slide tables 32 are used to drive the vision cameras 3 to slide to assist the vision cameras 3 in focusing.

[0055] The device also includes a light source bracket 4, which has two and is respectively located on the outside of the two vision cameras 3. The two ends of the two light source brackets 4 are respectively provided with an upper light source 41 and a lower light source 42. The upper light source 41 is used to illuminate the seam 8 to assist the vision camera 3 in obtaining the state of the seam 8.

[0056] The positioning seat 43 is fixedly located in the middle of the upper surface of the silicon rod bonding fixture 2. After the positioning seat 43 is illuminated by the light emitted by the lower light source 42, it produces a strip shadow. A silicon rod 7 to be bonded is positioned with the strip shadow as the reference surface.

[0057] The light guide plate 431 is fixedly mounted at the top center of the positioning base 43;

[0058] The light guide groove 432 is provided through the middle of the light guide plate 431 and is set as a strip structure. The light emitted by the lower light source 42 illuminates the light guide plate 431 and forms a shadow area on the outer side of the silicon rod 7 to be bonded. After some light passes through the light guide groove 432, it forms an illumination area at the seam 8 of the two silicon rods to be bonded so that the vision camera 3 can obtain the details of the seam 8.

[0059] LED light strip 413, which has two sets and is fixedly installed inside the upper light source 41 and the lower light source 42 respectively;

[0060] The light-blocking plate 414 has two sets and is respectively located on the outside of the two sets of LED light strips 413. Each set of light-blocking plates 414 has two symmetrical ones. The two light-blocking plates 414 limit the illumination range of the light emitted by the LED light strips 413 to prevent the area outside the silicon rod 7 to be bonded from being illuminated and interfering with the visual camera 3 to obtain the state of the seam 8.

[0061] Two light-blocking plates 414 are provided with support blocks 415 at both ends of their respective sides via pins, and the support blocks 415 are fixed to one end of the LED light strip 413. Two light-blocking plates 414 are provided with movable arms 416 at both ends of their respective sides via pins, and a transmission arm 417 is provided between the two movable arms 416 via pins. A lead screw sleeve 418 is fixed in the middle of the transmission arm 417, and an adjusting lead screw 419 is rotatably provided in the middle of the lead screw sleeve 418. An adjusting motor 4191 is provided at one end of the adjusting lead screw 419, and the adjusting motor 4191 is fixed to one end of the LED light strip 413. The two light-blocking plates 414 can rotate relative to each other to adjust the illumination width of the LED light strip 413, thereby achieving partial illumination of the seam 8 and improving the focusing speed of the visual camera 3 when shooting the local position of the seam 8.

[0062] The support plate 411 is fixedly disposed on the side of the upper light source 41 away from the silicon rod 7 to be bonded and is rotatably disposed on the top of the light source bracket 4.

[0063] Angle-adjusting motor 412 is fixedly mounted on the top of the light source bracket 4 and its output shaft is fixedly connected to the middle of the support plate 411. The angle-adjusting motor 412 drives the support plate 411 to rotate to adjust the angle of the upper light source 41 so that the local area of ​​the seam 8 is illuminated.

[0064] The device also includes a silicon rod positioning block 5, which is slidably disposed above the frame 1. The silicon rod positioning block 5 is used to adjust one end of a silicon rod 7 to be bonded to be in contact with the reference surface and to support the silicon rod 7 to be bonded.

[0065] The first telescopic cylinder 51 is located above the frame 1 and its output end is fixedly connected to the middle of the silicon rod positioning block 5. A fixed bracket 52 is fixedly provided on the outside of the first telescopic cylinder 51 and the fixed bracket 52 is fixedly located above the frame 1. The first telescopic cylinder 51 is used to adjust the position of the silicon rod positioning block 5.

[0066] The device also includes a splicing top block 6, which is slidably disposed above the frame 1. The splicing top block 6 is used to push another silicon rod 7 to be bonded so that the two silicon rods 7 to be bonded are spliced ​​together.

[0067] The second telescopic cylinder 61 is located above the frame 1 and its output end is fixedly connected to the middle of the splicing top block 6. Below the second telescopic cylinder 61, there is a lifting cylinder 62. The lifting cylinder 62 is fixedly located above the frame 1 and its output end is fixedly connected to the middle of the bottom end of the second telescopic cylinder 61. The lifting cylinder 62 is used to drive the second telescopic cylinder 61 and the splicing top block 6 to move up and down to ensure that the silicon rod bonding fixture 2 can slide above the silicon rod fixture conveying line 11.

[0068] When using the vision-based automatic adjustment device for bonding and splicing of silicon rods in this embodiment, firstly, after applying splicing adhesive to the ends of two sets of silicon rods 7 to be bonded, place them opposite each other in the groove 21 on the upper surface of the silicon rod bonding fixture 2. Then, transfer the silicon rod bonding fixture 2 to the top of the silicon rod fixture conveyor line 11. The silicon rod bonding fixture 2 is then conveyed to the space between two vision cameras 3 through the silicon rod fixture conveyor line 11. During this process, the loading of the silicon rods 7 to be bonded can be completed. During this process, the lifting cylinder 62 is in a retracted state, and the second telescopic cylinder 61 and the splicing top block 6 are located below the silicon rod fixture conveyor line 11.

[0069] After the silicon rod bonding fixture 2 is in place, the silicon rod fixture conveyor line 11 is stopped. At this time, the silicon rod bonding fixture 2 is in a fixed state. Then, the lower light source 42 is activated. The light emitted by the lower light source 42 shines on the positioning seat 43 and is projected onto the outer surface of the silicon rod 7 to be bonded, forming two vertical and narrow shadows. The shadows are used as the positioning reference surface of the silicon rod 7 to be bonded, which is fixed during the splicing process. The first telescopic cylinder 51 is pushed out. The first telescopic cylinder 51 pushes the silicon rod 7 to be bonded until one end of the silicon rod 7 to be bonded is completely aligned with the edge of the shadow area. During this process, two sets of vision cameras 3 take pictures in real time and judge the alignment of the end of the silicon rod 7 to be bonded with adhesive with the edge of the shadow area. When one end of the silicon rod 7 to be bonded is completely aligned with the edge of the shadow area, the first telescopic cylinder 51 stops pushing out and remains stationary. During this process, the silicon rod 7 to be bonded, which is fixed during the splicing process, completes the positioning and locks its position.

[0070] After the position of a set of silicone rods 7 to be bonded is locked, the lower light source 42 is turned off and the upper light source 41 is turned on. The light emitted by the upper light source 41 illuminates the seam 8 between the two silicone rods 7 to be bonded. At this time, the lifting cylinder 62 is pushed out. The lifting cylinder 62 drives the second telescopic cylinder 61 and the splicing top block 6 to rise, so that the splicing top block 6 moves to one end of the other set of silicone rods 7 to be bonded. Then the second telescopic cylinder 61 is pushed out. The second telescopic cylinder 61 pushes the other set of silicone rods 7 to be bonded through the splicing top block 6, so that the two sets of silicone rods 7 to be bonded approach each other and complete the splicing.

[0071] During the splicing process, the two sets of upper light sources 41 illuminate both sides of the splice seam 8 respectively, and the two sets of vision cameras 3 take pictures to obtain the size of the splice seam 8. When the splice seam 8 reaches the specified size (the splice seam 8 appears as a dark black line in the image of the vision camera 3), the second telescopic cylinder 61 is controlled to stop pushing out and remain stationary. During this process, the two sets of silicon rods 7 to be bonded are spliced.

[0072] After the splicing is completed, the control adjustment motor 4191 is started, and the adjustment motor 4191 drives the adjustment screw 419 to rotate. The adjustment screw 419 drives the transmission arm 417 to move through the screw sleeve 418. The transmission arm 417 drives the two light-blocking plates 414 to move through the movable arm 416, so that the two light-blocking plates 414 rotate relative to each other and move closer to each other. Due to the mutual approach of the two light-blocking plates 414, the illumination range of the LED light strip 413 is reduced. At this time, the light emitted by the LED light strip 413 can only illuminate a local area of ​​the splice seam 8. At this time, the vision camera 3 focuses and takes pictures according to the illuminated local area to obtain the local details of the splice seam 8. During this process, the angle adjustment motor 412 drives the upper light source 41 to rotate so that different local areas of the splice seam 8 are illuminated. The vision camera 3 takes multiple pictures to complete the detection of the details of the splice seam 8. During this process, the control camera slide 32 slides above the camera slide rail 31 to assist the vision camera 3 in focusing.

[0073] After the joint area 8 is photographed and inspected and meets the standards, the counterweight is placed on top of the two spliced ​​silicone rods. Then the silicone rod bonding fixture 2 can be transferred to the curing area to wait for the adhesive to cure.

[0074] It should be noted that the silicon rod tooling conveyor line 11, silicon rod bonding tooling 2, vision camera 3, LED light strip 413 and other structures in this embodiment all adopt the corresponding structures in the prior art, and are equipped with PLC control for unified control. The control logic of the above structures adopts the prior art, which will not be described in detail here.

[0075] It should be further noted that this embodiment only provides the relevant structures for splicing and adjustment during the bonding and splicing process of silicon rods. The loading and unloading of silicon rods and the placement of counterweights during the splicing process can be completed with the assistance of a robotic arm. The above technical means and structures all adopt existing technologies and will not be described in detail here.

[0076] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vision-based automatic adjustment device for the seam of adhesive rod / silicon rod bonding, characterized in that, include: The frame (1) has a silicon rod tooling conveyor line (11) inside. Silicon rod bonding fixture (2) is located above the silicon rod bonding fixture conveyor line (11). Two silicon rods (7) to be bonded are located above the silicon rod bonding fixture (2), and a seam (8) is provided between the two silicon rods (7). Two vision cameras (3) are provided and are both located above the frame (1). The two vision cameras (3) are located on both sides of the silicon rod bonding fixture (2). The light source bracket (4) has two and is respectively located on the outside of the two vision cameras (3). The two ends of the two light source brackets (4) are respectively provided with an upper light source (41) and a lower light source (42). The upper light source (41) is used to illuminate the seam (8) to assist the vision camera (3) in obtaining the state of the seam (8). The positioning seat (43) is fixedly located in the middle of the upper surface of the silicon rod bonding fixture (2). After the positioning seat (43) is irradiated by the light emitted by the lower light source (42), it produces a strip shadow. One of the silicon rods (7) to be bonded is positioned with the strip shadow as the reference surface. Silicon rod positioning block (5) is slidably disposed above the frame (1). The silicon rod positioning block (5) is used to adjust one end of a silicon rod (7) to be bonded to be in contact with the reference surface and to support the silicon rod (7) to be bonded. A splicing top block (6) is slidably disposed above the frame (1). The splicing top block (6) is used to push another silicon rod (7) to be bonded so that the two silicon rods (7) to be bonded are spliced ​​together. The light guide plate (431) is fixedly mounted at the top center of the positioning seat (43); The light guide groove (432) is located in the middle of the light guide plate (431) and is designed as a strip structure. The light emitted by the lower light source (42) illuminates the light guide plate (431) and forms a shadow area on the outer side of the silicon rod (7) to be bonded. Some of the light passes through the light guide groove (432) and forms an illumination area at the seam (8) of the two silicon rods (7) to be bonded so that the vision camera (3) can obtain the details of the seam (8).

2. The vision-based automatic adjustment device for bonding seams of silicone rods according to claim 1, characterized in that, Also includes: The first telescopic cylinder (51) is located above the frame (1) and its output end is fixedly connected to the middle of the silicon rod positioning block (5). A fixed bracket (52) is fixedly provided on the outside of the first telescopic cylinder (51) and the fixed bracket (52) is fixedly located above the frame (1). The first telescopic cylinder (51) is used to adjust the position of the silicon rod positioning block (5). The second telescopic cylinder (61) is located above the frame (1) and its output end is fixedly connected to the middle of the splicing top block (6). A lifting cylinder (62) is located below the second telescopic cylinder (61). The lifting cylinder (62) is fixedly located above the frame (1) and its output end is fixedly connected to the middle of the bottom end of the second telescopic cylinder (61). The lifting cylinder (62) is used to drive the second telescopic cylinder (61) and the splicing top block (6) to move up and down to ensure that the silicon rod bonding fixture (2) can slide above the silicon rod fixture conveying line (11).

3. The vision-based automatic adjustment device for bonding seams of silicone rods according to claim 1, characterized in that, Also includes: LED light strip (413), which has two sets and is fixed inside the upper light source (41) and the lower light source (42) respectively; The light-blocking plate (414) has two sets and is respectively located on the outside of the two sets of LED light strips (413). Each set of light-blocking plates (414) has two symmetrical upper and lower sets. The two light-blocking plates (414) limit the illumination range of the light emitted by the LED light strips (413) to prevent the area outside the silicon rod to be bonded (7) from being illuminated and interfering with the visual camera (3) in obtaining the splice (8) status.

4. The vision-based automatic adjustment device for bonding seams of silicone rods according to claim 3, characterized in that, Also includes: Each of the two light-blocking plates (414) is provided with a support block (415) at both ends of the side away from each other via a pin, and the support block (415) is fixedly provided at one end of the LED light strip (413). Each of the two light-blocking plates (414) is provided with a movable arm (416) at both ends of the side away from each other via a pin, and a transmission arm (417) is provided between the two movable arms (416) via a pin, and a lead screw sleeve (418) is fixedly provided in the middle of the transmission arm (417). The middle part of the lead screw sleeve (418) is rotatably provided with an adjusting lead screw (419). One end of the adjusting lead screw (419) is provided with an adjusting motor (4191), and the adjusting motor (4191) is fixedly located at one end of the LED light strip (413). The two light blocking plates (414) can rotate relative to each other to adjust the illumination width of the LED light strip (413) so as to achieve local illumination of the seam (8) and improve the focusing speed of the visual camera (3) when shooting the local position of the seam (8).

5. The vision-based automatic adjustment device for bonding seams of silicone rods according to claim 4, characterized in that, Also includes: The support plate (411) is fixed on the side of the upper light source (41) away from the silicon rod (7) to be bonded and is rotatably located at the top of the light source bracket (4); An angle-adjusting motor (412) is fixedly mounted on the top of the light source bracket (4) and its output shaft is fixedly connected to the middle of the support plate (411). The angle-adjusting motor (412) drives the support plate (411) to rotate to adjust the angle of the upper light source (41) so that the local area of ​​the seam (8) is illuminated.

6. The vision-based automatic adjustment device for bonding seams of silicone rods according to claim 1, characterized in that, Also includes: The slide groove (21) is located on the upper surface of the silicon rod bonding fixture (2). Both silicon rods (7) to be bonded are slidably located inside the slide groove (21). The slide groove (21) is used to ensure that the two silicon rods (7) to be bonded slide horizontally.

7. The vision-based automatic adjustment device for bonding seams of silicone rods according to claim 1, characterized in that, Also includes: The upper surface of the silicon rod tooling conveyor line (11) is provided with a positioning groove for positioning the silicon rod bonding tool (2).

8. The vision-based automatic adjustment device for bonding seams of silicone rods according to claim 1, characterized in that, Also includes: The two sets of vision cameras (3) are symmetrically arranged, and the two sets of vision cameras (3) are used to detect the seams (8) on both sides of the silicon rod (7) to be bonded.

9. The vision-based automatic adjustment device for bonding seams of silicone rods according to claim 1, characterized in that, Also includes: The camera slide rail (31) and camera slide table (32) are provided in two sets. The two sets of camera slide rails (31) are fixed above the frame (1). The two sets of camera slide tables (32) are respectively fixed at the bottom of the two vision cameras (3). The two sets of camera slide tables (32) are respectively slidably provided above the two sets of camera slide rails (31). The camera slide rail (31) and camera slide table (32) are used to drive the vision camera (3) to slide to assist the vision camera (3) in focusing.

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