Defect detection device for automobile lamp production and detection method thereof

Abstract

The invention is suitable for the technical field of automobile lamp detection, and provides a defect detection device for automobile lamp production and a detection method thereof, and the defect detection device comprises a mark display assembly and a compression assembly; the mark showing assembly comprises a long plate, a short plate, a telescopic air cylinder, a telescopic strip, a spraying pipe, a spraying head, a guide part and a movable part; the compression assembly comprises a baffle, a first compression air cylinder, a first compression strip, a first compression plate, a second compression air cylinder, a second compression strip, a second compression plate, a third compression plate and a self-adjusting piece. The spraying pipe and the spraying head move synchronously, the spraying head can spray water drops to the surface of the transparent automobile lampshade, the water drops slide along the surface of the transparent automobile lampshade, when the water drops pass through shallow scratches on the surface of the transparent automobile lampshade, the water drops can be gathered or irregularly flow, and when the water drops pass through the visual sensor for detection again, the water drops can be sprayed to the surface of the transparent automobile lampshade. Whether scratches appear or not can be judged according to the states of the water drops; and the accuracy of scratch detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive lamp detection, and more specifically, it relates to a defect detection device and a detection method for automotive lamp production. Background Art

[0002] Automotive lamps refer to various lamps installed on automobiles for lighting and signal transmission, including headlamps, tail lamps, turn signals, fog lamps, brake lamps, etc.; they play a crucial role during vehicle driving.

[0003] In the prior art, the production process of automotive lamps is a complex and delicate technological process, involving multiple steps and technologies such as design and development, mold manufacturing, material preparation, injection molding, optical component manufacturing, assembly, testing and debugging, quality control, etc.; before assembling automotive lamps, it is also necessary to separately detect scratches on the transparent lamp covers and black bases of automotive lamps to ensure the subsequent assembly efficiency of automotive lamps.

[0004] Before detecting the transparent lamp cover of a vehicle, it needs to go through a series of processing procedures such as deburring and coating. However, the coating will cover the scratches on the surface of the transparent lamp cover. If the scratches on the surface of the transparent lamp cover are relatively shallow, it will be difficult to detect the scratches after coating, thus reducing the accuracy of scratch detection and being unfavorable for the detection efficiency of the transparent lamp cover.

[0005] At the same time, during the process of detecting the corners of the transparent lamp cover of a vehicle, since there are multiple irregular surfaces at the corners of the transparent lamp cover, when the detection light shines down, the detection light will refract or reflect at the corners. The refracted and reflected rays will cause a relatively high intensity of light irradiation. The relatively high-intensity light will affect the detection accuracy of the sensor, and thus affect the visibility of scratches, further reducing the accuracy of scratch detection; for this reason, a defect detection device and a detection method for automotive lamp production are proposed to improve the existing problems. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a defect detection device and a detection method for automotive lamp production.

[0007] To achieve the above object, the present invention provides the following technical solutions: A defect detection device for automobile lamp production, comprising a detection component and a trace showing component; wherein, the detection component includes a support base, a guardrail arranged on the top of the support base, a robotic arm arranged in the middle of the guardrail, a fixed disk arranged at the execution end of the robotic arm, lamp tubes evenly arranged on the side of the fixed disk away from the robotic arm, and a vision sensor arranged in the middle of the lamp tubes; the trace showing component is arranged on one side of the robotic arm, and includes long plates symmetrically arranged in the axial direction above the guardrail, short plates symmetrically arranged in the radial direction between the long plates, telescopic cylinders symmetrically arranged in the axial direction on one side of one of the short plates, telescopic bars arranged at the telescopic ends of the telescopic cylinders, spray pipes evenly arranged between the telescopic bars, spray heads evenly arranged on the outer wall of the spray pipes, guiding members arranged on the side of the telescopic bars away from the spray pipes, and movable members arranged below the spray pipes.

[0008] The present invention is further arranged as follows: A compression component is further arranged on the movable member; the compression component includes a baffle, a first compression cylinder arranged on one side of the baffle, a first compression bar arranged at the telescopic end of the first compression cylinder, a first compression plate arranged at the end of the first compression bar away from the first compression cylinder, a second compression cylinder arranged on one side of the first compression plate, a second compression bar arranged at the telescopic end of the second compression cylinder, a second compression plate arranged at the end of the second compression bar away from the second compression cylinder, a third compression plate arranged on one side of the second compression plate, and a self-adjusting member arranged at the end of the third compression plate away from the second compression plate.

[0009] The present invention is further arranged as follows: Guide grooves are formed on the side walls of the long plates, the two guide grooves are arranged oppositely, the bottom of the short plate is connected to the top of the guardrail, and the telescopic end of the telescopic cylinder penetrates through the side wall of one of the short plates and is connected to the telescopic bar.

[0010] The present invention is further arranged as follows: The guiding member includes guiding plates symmetrically arranged in the radial direction on the top of the telescopic bar, and guiding rollers rotatably connected to the sides of the guiding plates away from the telescopic bar; the guiding rollers can slide in the corresponding guide grooves.

[0011] The present invention is further configured as follows: The movable member includes a fixed plate, a radial motor disposed on the top of the fixed plate, a radial shaft disposed at the output end of the radial motor, a radial worm disposed on the radial shaft, first fixed slide rails symmetrically disposed in the radial direction on the top of the fixed plate, a first slide plate disposed on one side of the first fixed slide rails, a first arc track disposed between the first slide plates, an axial motor disposed on one side of the first arc track, an axial shaft disposed at the output end of the axial motor, an axial worm disposed on the axial shaft, second fixed slide rails symmetrically disposed in the axial direction on the top of the fixed plate, a second slide plate disposed on one side of the second fixed slide rails, a second arc track disposed between the second slide plates, and a movable plate disposed above the first arc track; The fixed plate is located on the top of the support seat, the radial shaft and the axial shaft are both connected to the top of the fixed plate through bearing seats, a first chute is formed on the side wall of the first fixed slide rail close to the first slide plate, the two first chutes are distributed oppositely, the first slide plate is slidably engaged in the corresponding first chute, first teeth are uniformly formed on the bottom of the first slide plate, and the first teeth are in meshing transmission with the corresponding radial worm.

[0012] The present invention is further configured as follows: A second chute is formed on the side wall of the second fixed slide rail close to the second slide plate, the two second chutes are distributed oppositely, the second slide plate is slidably engaged in the corresponding second chute, second teeth are uniformly formed on the bottom of the second slide plate, and the second teeth are in meshing transmission with the corresponding axial worm, the first arc track and the second arc track are distributed in a cross shape, and the first arc track is located above the second arc track; A first rail block is disposed at the bottom of the movable plate, a second rail block is disposed on the side of the first rail block away from the movable plate, the first rail block is slidably engaged in the first arc track, the second rail block is slidably engaged in the second arc track, and a clamping member is further disposed on the top of the movable plate.

[0013] The present invention is further configured as follows: The compression assembly is located on the movable plate, the bottom of the baffle is connected to the top of the movable plate, the outer walls of the first compression cylinder and the second compression cylinder are both connected to the side wall of the movable plate, the second compression cylinder is obliquely distributed, and the baffle, the first compression plate, the second compression plate and the third compression plate surround to form a square.

[0014] The present invention is further configured as follows: The self-adjusting member includes an adjusting plate, a spring disposed in the adjusting plate, and a displacement block disposed at one end of the spring; One end of the adjusting plate is connected to the side wall of the movable plate, a displacement groove is formed on the top of the adjusting plate, the end of the spring away from the displacement block is connected to the inner wall of the displacement groove, and the end of the displacement block away from the spring is connected to the end of the third compression plate away from the second compression plate.

[0015] The present invention is further configured such that: a control program is built into the lamp tube, the control program is electrically connected to a vision sensor, and the lamp tube changes its color according to the settings of the control program. The colors of the lamp tube include: red, white, and blue; The control program includes an input module, a control module, and a characterization module; The input module inputs vehicle lamp values manually, including length and thickness, and inputs different instructions to the control module according to different thickness value ranges corresponding to the length value; The control module controls the lamp tube to change its color, and the vision sensor feeds back the recognized length to the control module in real time; The characterization module is used to receive the picture signal transmitted by the vision sensor; The input module sends different instructions to the control module according to different input ranges, and its thickness range is: When the thickness value corresponding to the length value is in the range of 15 - 25 mm (excluding 25 mm), input 0 to the control module; When the thickness value corresponding to the length value is in the range of 25 - 35 mm (excluding 35 mm), input 1 to the control module; When the thickness value corresponding to the length value is in the range of 35 - 40 mm, input 2 to the control module; When the control module receives instruction 0, it controls the lamp tube color to turn blue. When the control module receives instruction 1, it controls the lamp tube color to become white. When the control module receives instruction 2, it controls the lamp tube color to become red.

[0016] A method for detecting defects in the production of automotive lamps, using the device for detecting defects in the production of automotive lamps as described above, includes the following steps: S1. When detecting the transparent lamp cover of the vehicle lamp, the transparent lamp cover can be first installed on the movable part, and then the robotic arm is started to bring the lamp tube and the vision sensor close to the surface of the transparent lamp cover, so as to detect the scratch defects on the surface of the transparent lamp cover; S2. If the shallow scratches on the surface of the transparent lamp cover are affected by the previous coating process, making it difficult to detect the shallow scratches, the telescopic cylinder can be started, and its telescopic end pushes the telescopic bar close to the upper part of the transparent lamp cover, so that the spray pipe and the spray head move synchronously. At this time, the spray head can spray water droplets onto the surface of the transparent lamp cover, and the water droplets slide along the surface of the transparent lamp cover. When the water droplets pass through the shallow scratches on the surface of the transparent lamp cover, it will cause the water droplets to gather or flow irregularly. When detecting again through the vision sensor, the state of the water droplets can be used to determine whether there are scratches; S3. During the process of S2, the movable part is activated. On the one hand, the transparent headlight cover can be clamped through the mechanism on the movable part. On the other hand, it can drive the transparent headlight cover to swing in all directions, so that water droplets repeatedly slide on the surface of the transparent headlight cover, and contact detection is carried out for scratches in different directions, thereby ensuring the accuracy of scratch detection. S4. When the robotic arm drives the lamp tube and the vision sensor close to the corner of the transparent headlight cover, at this time, the detection light will be refracted or reflected at the corner. The refracted and reflected rays will cause a relatively high illumination intensity of the light. The relatively high-intensity light will affect the detection accuracy of the sensor and the visibility of scratches. Therefore, on the one hand, the first compression cylinder is activated, and its telescopic end pushes the first compression plate close to the transparent headlight cover through the first compression bar. On the other hand, the second compression cylinder is activated, and its telescopic end pushes the second compression plate close to the transparent headlight cover through the second compression bar. During this process, the second compression plate will also squeeze the third compression plate. Thus, the baffle, the first compression plate, the second compression plate and the third compression plate surround and block the periphery of the transparent headlight cover, thereby reducing the interference of external light, internal refracted or reflected light.

[0017] In summary, the present application includes at least one of the following beneficial technical effects: (1) The telescopic cylinder is used to push the telescopic strip close to the upper part of the transparent headlight cover, so that the spray pipe and the spray head are displaced synchronously. The spray head can spray water droplets onto the surface of the transparent headlight cover, so that the water droplets slide along the surface of the transparent headlight cover. When the water droplets pass through the shallower scratches on the surface of the transparent headlight cover, it will cause the water droplets to gather or flow irregularly. When detected by the vision sensor again, the state of the water droplets can be used to judge whether there are scratches; the accuracy of scratch detection is improved, and the detection efficiency of the transparent headlight cover is improved.

[0018] (2) Through the design of the movable part, on the one hand, the transparent headlight cover can be clamped through the mechanism on the movable part. On the other hand, it can drive the transparent headlight cover to swing in all directions, so that water droplets repeatedly slide on the surface of the transparent headlight cover, and contact detection is carried out for scratches in different directions, thereby ensuring the accuracy of scratch detection.

[0019] (3) By activating the first compression cylinder, its telescopic end pushes the first compression plate close to the transparent headlight cover through the first compression bar; activating the second compression cylinder, its telescopic end pushes the second compression plate close to the transparent headlight cover through the second compression bar. During this process, the second compression plate will also squeeze the third compression plate. Thus, the baffle, the first compression plate, the second compression plate and the third compression plate surround and block the periphery of the transparent headlight cover, which can reduce the interference of external light, internal refracted or reflected light, thereby improving the visibility of scratches and further improving the accuracy of scratch detection. Description of the Drawings

[0020] Figure 1 This is a schematic diagram of the overall structure of the defect detection device for automobile lamp production according to the present invention.

[0021] Figure 2 This is a schematic diagram of the overall structure of the robotic arm in the present invention.

[0022] Figure 3 This is a schematic diagram of the overall structure of the trace display component in the present invention.

[0023] Figure 4 This is a schematic diagram of the overall structure of the movable part in the present invention.

[0024] Figure 5 This is a schematic diagram of the overall structure of the clamping part in the present invention.

[0025] Figure 6 This is a schematic diagram of the overall structure of the fixed plate in the present invention.

[0026] Figure 7 This is an exploded view of the movable part in the present invention.

[0027] Figure 8 This is a schematic diagram of the overall structure of the movable plate, the first rail block and the second rail block in the present invention.

[0028] Figure 9 This is a schematic diagram of the overall structure of the compression component in the present invention.

[0029] Figure 10 This is a schematic diagram of the overall structure of the self-adjusting part in the present invention.

[0030] Explanation of reference numerals: 1, detection component; 11, support base; 12, protective fence; 13, robotic arm; 14, fixed disk; 15, lamp tube; 16, vision sensor; 2, trace display component; 21, long plate; 211, guide groove; 22, short plate; 23, telescopic cylinder; 24, telescopic bar; 25, spray pipe; 26, spray head; 27, guide part; 271, guide plate; 272, guide roller; 28, movable part; 281, fixed plate; 282, radial motor; 2821, radial shaft; 2822, radial worm; 283, first fixed slide rail; 2831, first slide plate; 2832, first chute; 2833, first tooth block; 284, first arc track; 285, axial motor; 2851, axial shaft; 2852, axial worm; 286, second fixed slide rail; 2861, second slide plate; 2862, second chute; 2863, second tooth block; 287, second arc track; 288, movable plate; 2881, first rail block; 2882, second rail block; 289, clamping part; 2891, clamping cylinder; 2892, clamping plate; 3. Compression component; 31. Baffle; 32. First compression cylinder; 33. First compression strip; 34. First compression plate; 35. Second compression cylinder; 36. Second compression strip; 37. Second compression plate; 38. Third compression plate; 39. Self-adjusting component; 391. Adjusting plate; 392. Spring; 393. Displacement block; 394. Displacement groove. Detailed implementation manner

[0031] It should be noted that unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0032] Please refer to Figures 1 - 10 , the present invention provides the following technical solutions: Example 1, refer to Figures 1 - 10 , a defect detection device for automobile lamp production, including a detection component 1, a trace display component 2 and a compression component 3; among them, the function of the detection component 1 is to detect a series of defects such as scratches and air bubbles on the transparent lamp cover through light and a vision sensor 16, so as to ensure the assembly efficiency of subsequent automobile lamps.

[0033] The function of the trace display component 2 is to judge whether there are shallow scratches on the surface of the transparent lamp cover by observing the slip distribution state of water droplets, thus avoiding the problem that the coating will cover the scratches on the surface of the transparent lamp cover. If the scratches on the surface of the transparent lamp cover are shallow, it will lead to the problem that the scratches after coating are difficult to be detected, improving the accuracy of scratch detection and thus improving the detection efficiency of the transparent lamp cover.

[0034] The function of the compression component 3 is to block the light sources around the transparent lamp cover by setting baffles around the transparent lamp cover, and at the same time absorb the refracted or reflected light, thus avoiding the problem that when the detection light shines down, the detection light will refract or reflect at the corner, and the refracted and reflected rays will cause a higher intensity of light irradiation, and the higher intensity of light will affect the detection accuracy of the sensor, thereby improving the visibility of scratches and further improving the accuracy of scratch detection.

[0035] Refer to Figures 1 - 2 , specifically, the detection component 1 includes a support base 11, a guardrail 12 arranged on the top of the support base 11, a robotic arm 13 arranged in the middle of the guardrail 12, a fixing plate 14 arranged at the execution end of the robotic arm 13, a lamp tube 15 uniformly arranged on the side of the fixing plate 14 away from the robotic arm 13, and a vision sensor 16 arranged in the middle of the lamp tube 15.

[0036] When detecting the transparent headlight cover, the transparent headlight cover can be first installed on the movable member 28. Subsequently, the robotic arm 13 is activated to bring the fixed disk 14, the lamp tube 15, and the vision sensor 16 close to the surface of the transparent headlight cover, so that the vision sensor 16 can detect the scratch defects on the surface of the transparent headlight cover.

[0037] It should be noted that the robotic arm 13 includes a base and a robotic arm; the robotic arm can rotate on the base to adjust the rotation angle, and the robotic arm can adjust the up and down position to achieve a better detection angle.

[0038] Refer to Figures 3 - 8 , specifically, the visible trace assembly 2 is arranged on one side of the robotic arm 13, and it includes long plates 21 symmetrically arranged in the axial direction above the guardrail 12, short plates 22 symmetrically arranged in the radial direction between the long plates 21, telescopic cylinders 23 symmetrically arranged in the axial direction on one side of one of the short plates 22, telescopic bars 24 arranged at the telescopic ends of the telescopic cylinders 23, spray pipes 25 evenly arranged between the telescopic bars 24, spray heads 26 evenly arranged on the outer walls of the spray pipes 25, guide members 27 arranged on the side of the telescopic bars 24 away from the spray pipes 25, and a movable member 28 arranged below the spray pipes 25.

[0039] Among them, if the shallower scratches on the surface of the transparent headlight cover are affected by the previous coating process, resulting in difficult detection of the shallower scratches, the telescopic cylinder 23 can be activated, and its telescopic end pushes the telescopic bar 24 close to the upper part of the transparent headlight cover, so that the spray pipe 25 and the spray heads 26 move synchronously. At this time, the spray heads 26 can spray water droplets onto the surface of the transparent headlight cover, and the water droplets slide along the surface of the transparent headlight cover. When the water droplets pass through the shallower scratches on the surface of the transparent headlight cover, it will cause the water droplets to gather or flow irregularly. When detecting again through the vision sensor 16, the state of the water droplets can be used to judge whether there are scratches; thus, it is avoided that the coating will cover the scratches on the surface of the transparent headlight cover. If the scratches on the surface of the transparent headlight cover are shallower, it will lead to the problem that the scratches after coating are difficult to detect, improving the accuracy of scratch detection and then improving the detection efficiency of the transparent headlight cover.

[0040] At the same time, during the operation of the spray heads 26, the movable member 28 is activated. On the one hand, the transparent headlight cover can be clamped through the mechanism on the movable member 28, and on the other hand, it can drive the transparent headlight cover to swing in all directions, so that the water droplets repeatedly slide on the surface of the transparent headlight cover, and contact detection is carried out for scratches in different directions, thereby ensuring the accuracy of scratch detection.

[0041] It should be noted that the residual water droplets on the surface of the transparent headlight cover after spraying can be wiped manually.

[0042] Refer to Figures 9 - 10, Specifically, the compression assembly 3 is arranged on the movable part 28 and includes a baffle 31, a first compression cylinder 32 arranged on one side of the baffle 31, a first compression strip 33 arranged at the telescopic end of the first compression cylinder 32, a first compression plate 34 arranged at the end of the first compression strip 33 away from the first compression cylinder 32, a second compression cylinder 35 arranged on one side of the first compression plate 34, a second compression strip 36 arranged at the telescopic end of the second compression cylinder 35, a second compression plate 37 arranged at the end of the second compression strip 36 away from the second compression cylinder 35, a third compression plate 38 arranged on one side of the second compression plate 37, and a self-adjusting part 39 arranged at the end of the third compression plate 38 away from the second compression plate 37.

[0043] Among them, when the robotic arm 13 drives the lamp tube 15 and the vision sensor 16 close to the corner of the transparent car lamp cover, at this time, the detected light will be refracted or reflected at the corner. The refracted and reflected rays will cause a higher irradiation intensity of the light. The higher-intensity light will affect the detection accuracy of the sensor and the visibility of the scratch. Therefore, on the one hand, the first compression cylinder 32 is activated, and its telescopic end pushes the first compression plate 34 close to the transparent car lamp cover through the first compression strip 33; on the other hand, the second compression cylinder 35 is activated, and its telescopic end pushes the second compression plate 37 close to the transparent car lamp cover through the second compression strip 36. During this process, the second compression plate 37 will also squeeze the third compression plate 38; thus, the baffle 31, the first compression plate 34, the second compression plate 37, and the third compression plate 38 surround and block the four sides of the transparent car lamp cover, which can reduce the interference of external light, internal refracted or reflected light, and thus avoid the problem that when the detected light shines down, the detected light will be refracted or reflected at the corner, and the refracted and reflected rays will cause a higher irradiation intensity of the light, and the higher-intensity light will affect the detection accuracy of the sensor, thereby improving the visibility of the scratch and further improving the accuracy of scratch detection.

[0044] Refer to Figures 1 - 3 , Further, guide grooves 211 are formed on the side wall of the long plate 21. The two guide grooves 211 are arranged oppositely. The bottom of the short plate 22 is connected to the top of the guardrail 12. The telescopic end of the telescopic cylinder 23 penetrates through the side wall of one of the short plates 22 and is connected to the telescopic strip 24.

[0045] Refer to Figures 1 - 3 , Still further, the guide member 27 includes guide plates 271 symmetrically arranged in the radial direction on the top of the telescopic strip 24, and guide rollers 272 rotatably connected to the side of the guide plate 271 away from the telescopic strip 24; the guide rollers 272 can slide in the corresponding guide grooves 211.

[0046] Among them, the telescopic cylinder 23 is activated, and its telescopic end pushes the telescopic bar 24 close to the upper part of the transparent lamp cover, so that the spray pipe 25 and the spray head 26 are displaced synchronously. During this process, the telescopic bar 24 also drives the corresponding guide plates 271 at both ends to be displaced synchronously, so that the corresponding guide rollers 272 perform guiding sliding in the corresponding guide grooves 211, thus achieving the purpose of guiding.

[0047] Refer to Figures 4 - 8 Furthermore, the movable member 28 includes a fixed plate 281, a radial motor 282 arranged on the top of the fixed plate 281, a radial shaft 2821 arranged on the output end of the radial motor 282, a radial worm 2822 arranged on the radial shaft 2821, first fixed slide rails 283 symmetrically arranged in the radial direction on the top of the fixed plate 281, a first slide plate 2831 arranged on one side of the first fixed slide rail 283, a first arc track 284 arranged between the first slide plates 2831, an axial motor 285 arranged on one side of the first arc track 284, an axial shaft 2851 arranged on the output end of the axial motor 285, an axial worm 2852 arranged on the axial shaft 2851, second fixed slide rails 286 symmetrically arranged in the axial direction on the top of the fixed plate 281, a second slide plate 2861 arranged on one side of the second fixed slide rail 286, a second arc track 287 arranged between the second slide plates 2861, and a movable plate 288 arranged above the first arc track 284; the fixed plate 281 is located on the top of the support base 11, the radial shaft 2821 and the axial shaft 2851 are both connected to the top of the fixed plate 281 through bearing seats, first chutes 2832 are formed on the side wall of the first fixed slide rail 283 close to the first slide plate 2831, the two first chutes 2832 are distributed oppositely, the first slide plate 2831 is slidably fitted in the corresponding first chute 2832, first tooth blocks 2833 are uniformly formed on the bottom of the first slide plate 2831, and the first tooth blocks 2833 are meshed and driven with the corresponding radial worms 2822.

[0048] Among them, the radial motor 282 starts, driving the radial shaft 2821 and the radial worm 2822 to rotate. Since the radial worm 2822 is in meshing transmission with the first tooth block 2833, when the radial worm 2822 rotates, it can drive the first slide plate 2831 to slide in the first chute 2832 through the first tooth block 2833, so that the two first slide plates 2831 drive the first arc track 284 to swing synchronously; during this process, since the first track block 2881 is slidably fitted in the first arc track 284, when the first arc track 284 swings, it will also drive the first track block 2881 to slide along the track opening direction of the first arc track 284, so that the movable plate 288 swings and offsets in one direction, making the transparent car lamp cover on the movable plate 288 tilt, causing the water droplets to repeatedly slide on the surface of the transparent car lamp cover, and performing contact detection on scratches in different directions, so as to ensure the accuracy of scratch detection.

[0049] Refer to Figures 4 - 8 , furthermore, on the side wall of the second fixed slide rail 286 close to the second slide plate 2861, there are second chutes 2862 opened. The two second chutes 2862 are distributed oppositely. The second slide plate 2861 is slidably fitted in the corresponding second chute 2862. The bottom of the second slide plate 2861 is evenly provided with second tooth blocks 2863. The second tooth blocks 2863 are in meshing transmission with the corresponding axial worms 2852. The first arc track 284 and the second arc track 287 are distributed in a cross shape, and the first arc track 284 is located above the second arc track 287; a first track block 2881 is provided at the bottom of the movable plate 288. A second track block 2882 is provided on the side of the first track block 2881 away from the movable plate 288. The first track block 2881 is slidably fitted in the first arc track 284, and the second track block 2882 is slidably fitted in the second arc track 287. A clamping member 289 is further provided on the top of the movable plate 288.

[0050] Among them, the axial motor 285 starts, driving the axial shaft 2851 and the axial worm 2852 to rotate. Since the axial worm 2852 is in meshing transmission with the second tooth block 2863, when the axial worm 2852 rotates, it can drive the second slide plate 2861 to slide in the second chute 2862 through the second tooth block 2863, so that the two second slide plates 2861 drive the second arc track 287 to swing synchronously; during this process, since the second track block 2882 is slidably fitted in the second arc track 287, when the second arc track 287 swings, it will also drive the second track block 2882 to slide along the track opening direction of the second arc track 287, so that the movable plate 288 swings and offsets in another direction, making the transparent car lamp cover on the movable plate 288 tilt, causing the water droplets to repeatedly slide on the surface of the transparent car lamp cover, and performing contact detection on scratches in different directions, so as to ensure the accuracy of scratch detection.

[0051] It should be noted that the clamping member 289 includes a clamping cylinder 2891 and clamping plates 2892 symmetrically arranged at the clamping ends of the clamping cylinder 2891.

[0052] When clamping the transparent lamp cover, first place the transparent lamp cover in the middle of the clamping plates 2892, and then start the clamping cylinder 2891 to drive the two clamping plates 2892 to approach each other, thereby achieving the purpose of clamping.

[0053] Embodiment 2, refer to Figures 9 - 10 , further, the compression assembly 3 is located on the movable plate 288, the bottom of the baffle 31 is connected to the top of the movable plate 288, the outer walls of the first compression cylinder 32 and the second compression cylinder 35 are both connected to the side wall of the movable plate 288, the second compression cylinder 35 is obliquely distributed, and the baffle 31, the first compression plate 34, the second compression plate 37 and the third compression plate 38 surround to form a square.

[0054] Refer to Figures 9 - 10 , furthermore, the self-adjusting member 39 includes an adjusting plate 391, a spring 392 arranged in the adjusting plate 391, and a displacement block 393 arranged at one end of the spring 392; one end of the adjusting plate 391 is connected to the side wall of the movable plate 288, a displacement groove 394 is formed at the top of the adjusting plate 391, the end of the spring 392 away from the displacement block 393 is connected to the inner wall of the displacement groove 394, and the end of the displacement block 393 away from the spring 392 is connected to the end of the third compression plate 38 away from the second compression plate 37.

[0055] Among them, during the process of the second compression plate 37 squeezing the third compression plate 38, the third compression plate 38 will also squeeze the displacement block 393 and the spring 392, causing the displacement block 393 to slide in the displacement groove 394, deforming the spring 392 from the free state to the compressed state, so that the baffle 31, the first compression plate 34, the second compression plate 37 and the third compression plate 38 surround and block the four sides of the transparent lamp cover, which can reduce the interference of external light, internal refracted or reflected light, thereby avoiding the phenomenon that when the detection light shines down, the detection light will refract or reflect at the corner, and the refracted and reflected rays will cause a relatively high intensity of light irradiation, and the relatively high-intensity light will affect the detection accuracy of the sensor, thus improving the visibility of the scratch and further improving the accuracy of scratch detection.

[0056] Embodiment 3. Through the mutual cooperation of Embodiment 1 and Embodiment 2, although the problem in the prior art that the scratches on the surface of the transparent headlight cover will be covered by the coating, and if the scratches on the surface of the transparent headlight cover are relatively shallow, it will be difficult to detect the scratches after coating, and when the detection light shines down, the detection light will refract or reflect at the corners, and the refracted and reflected rays will cause a relatively high intensity of light irradiation, and the relatively high-intensity light will affect the detection accuracy of the sensor, are solved, however, the problem in the prior art that when the detection light irradiates a relatively thick area of the transparent headlight cover, the propagation of the light will be attenuated, resulting in difficult scratch detection, is still not solved; for this reason, the following solution is proposed now: Refer to Figures 1 - 10 , further, the lamp tube 15 has a built-in control program, and the lamp tube 15 changes its color according to the settings of the control program. The colors of the lamp tube 15 include: red, white, and blue. The color change of the lamp tube 15 adopts RGB LED technology. With RGB LED technology, the lamp tube 15 can perform various color transformations, but in this control program, only its red, white, and blue changes are performed.

[0057] The control program includes an input module, a control module, and a characterization module; the input module inputs the headlight values manually, and inputs different instructions to the control module according to different value ranges; the control module controls the lamp tube 15 to change its color, and the visual sensor 16 feeds back the recognized length to the control module in real time.

[0058] Its thickness range is: When the thickness value corresponding to the length value is within the range of 15 - 25 mm (excluding 25 mm), input 0 to the control module; When the thickness value corresponding to the length value is within the range of 25 - 35 mm (excluding 35 mm), input 1 to the control module; When the thickness value corresponding to the length value is within the range of 35 - 40 mm, input 2 to the control module; When the control module receives the instruction 0, it controls the color of the lamp tube 15 to change to blue. When the control module receives the instruction 1, it controls the color of the lamp tube 15 to change to white. When the control module receives the instruction 2, it controls the color of the lamp tube 15 to change to red.

[0059] It should be noted by way of example that the control module is used to input the thickness range corresponding to each length of the current headlight cover, and its input mode is: the length of each section of the headlight and the thickness of the headlight corresponding to that section of the length, such as: starting from one end (taking the currently input set of headlight starting sections as length 0): Length: 0 - 15 cm, Thickness: 16 mm; Length: 15 - 35 cm, Thickness: 36 mm; That is, starting from this end, the vision sensor 16 starts to identify from one end. At the beginning, the control component receives instruction 0 and controls the lamp tube 15 to emit blue light; when the vision sensor 16 identifies a length of 15 cm, the control component receives instruction 2 and controls the lamp tube 15 to emit red light.

[0060] This change in the color of the lamp tube 15 is due to the significant difference in the light attenuation degree. The attenuation of red light in the transparent material is small, and the transmission effect is good. The contrast between red light and the transparent material is high, and scratches are easier to observe. Therefore, this red light is suitable for use in thicker areas; while the attenuation of white light in the transparent material is moderate, and it can transmit through the lamp housing in the range of 25 - 35 mm. Therefore, white light is selected in this thickness range; in thinner areas, due to the high contrast between blue light and the transparent material, scratches are easier to observe. Therefore, blue light is used in the range of 15 - 25 mm. Correspondingly, due to the different transmission effects of light in different materials, the operator can change the numerical range in the input module.

[0061] In the prior art, some defect detection devices also use the vision sensor 16 to change the light by detecting the thicker area of the car lamp. However, this technology has an unsatisfactory effect in the actual detection process. First of all, when using the vision sensor 16 to distinguish between thick and thin, due to the refraction and reflection of light in the thicker area or the bent area, it will affect the judgment of the vision sensor 16 on the thickness, and it is easy to cause misjudgment; moreover, the thickness of the car lamp is established data. Through this precise data division, it is possible to simply and conveniently divide the range by inputting the thickness of different areas of the car lamp, and the accuracy of the result is higher and more convenient compared with the method using the vision sensor 16.

[0062] The characterization module receives the picture information transmitted by the vision sensor 16. The operator can directly identify the scratches through the characterization module. It should be noted that the control module controls the lamp tube 15 to change the color, but it is only for the convenience of the recognition effect of the vision sensor 16. When the vision sensor 16 transmits an image, the different color picture segments it identifies are converted into black and white pictures for the convenience of the operator's observation.

[0063] Embodiment 4, a defect detection method for automotive lamp production, using the defect detection device for automotive lamp production as described above, includes the following steps: S1. When detecting the transparent lamp housing, the transparent lamp housing can be first installed on the movable part 28, and then the robotic arm 13 is started to bring the lamp tube 15 and the vision sensor 16 close to the surface of the transparent lamp housing, so as to detect the scratch defects on the surface of the transparent lamp housing.

[0064] S2. If the shallow scratches on the surface of the transparent lamp cover are affected by the coating process in the previous step, making it difficult to detect the shallow scratches, the telescopic cylinder 23 can be activated. Its telescopic end pushes the telescopic strip 24 close to the upper part of the transparent lamp cover, causing the spray pipe 25 and the spray head 26 to move synchronously. At this time, the spray head 26 can spray water droplets onto the surface of the transparent lamp cover, causing the water droplets to slide along the surface of the transparent lamp cover. When the water droplets pass through the shallow scratches on the surface of the transparent lamp cover, it will cause the water droplets to gather or flow irregularly. When detected again by the visual sensor 16, the state of the water droplets can be used to determine whether there are scratches.

[0065] S3. During the operation of S2, the movable part 28 is activated. On the one hand, the transparent lamp cover can be clamped through the mechanism on the movable part 28. On the other hand, it can drive the transparent lamp cover to swing in all directions, causing the water droplets to repeatedly slide on the surface of the transparent lamp cover, and conduct contact detection for scratches in different directions, so as to ensure the accuracy of scratch detection.

[0066] S4. When the robotic arm 13 drives the lamp tube 15 and the visual sensor 16 close to the corner of the transparent lamp cover, at this time, the detection light will be refracted or reflected at the corner. The refracted and reflected rays will cause a relatively high intensity of light irradiation. The relatively high-intensity light will affect the detection accuracy of the sensor and the visibility of scratches. Therefore, on the one hand, the first compression cylinder 32 is activated, and its telescopic end pushes the first compression plate 34 close to the transparent lamp cover through the first compression strip 33. On the other hand, the second compression cylinder 35 is activated, and its telescopic end pushes the second compression plate 37 close to the transparent lamp cover through the second compression strip 36. During this process, the second compression plate 37 will also squeeze the third compression plate 38. Thus, the baffle 31, the first compression plate 34, the second compression plate 37 and the third compression plate 38 surround and block the periphery of the transparent lamp cover, thereby reducing the interference of external light, internal refracted or reflected light.

[0067] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A defect detection device for automobile lamp production, characterized in that: include, A detection assembly (1), comprising a support base (11), a guardrail (12) arranged on the top of the support base (11), a mechanical arm (13) arranged in the middle of the guardrail (12), a fixing plate (14) arranged at the execution end of the mechanical arm (13), light tubes (15) evenly arranged on a side of the fixing plate (14) away from the mechanical arm (13), and a visual sensor (16) arranged in the middle of the light tubes (15); The trace-displaying assembly (2) is arranged on one side of the mechanical arm (13), and comprises a long plate (21) symmetrically arranged above the guardrail (12) in the axial direction, a short plate (22) symmetrically arranged between the long plates (21) in the radial direction, a telescopic cylinder (23) symmetrically arranged on one side of one of the short plates (22) in the axial direction, a telescopic bar (24) arranged at the telescopic end of the telescopic cylinder (23), a spray pipe (25) evenly arranged between the telescopic bars (24), a spray head (26) evenly arranged on the outer wall of the spray pipe (25), a guide member (27) arranged on the side of the telescopic bar (24) away from the spray pipe (25), and a movable member (28) arranged below the spray pipe (25); the guide member (27) is used to guide the spray pipe (25) and the spray head (26) to slide, and the movable member (28) is used to drive the transparent headlight cover to swing in all directions.

2. The defect detection device for automobile lamp production according to claim 1, characterized in that: The movable member (28) is also provided with a compression assembly (3); the compression assembly (3) comprises a baffle (31), a first compression cylinder (32) provided on one side of the baffle (31), a first compression bar (33) provided at the telescopic end of the first compression cylinder (32), a first compression plate (34) provided at an end of the first compression bar (33) away from the first compression cylinder (32), a second compression cylinder (35) provided on one side of the first compression plate (34), a second compression bar (36) provided at the telescopic end of the second compression cylinder (35), a second compression plate (37) provided at an end of the second compression bar (36) away from the second compression cylinder (35), a third compression plate (38) provided on one side of the second compression plate (37), and a self-adjusting member (39) provided at an end of the third compression plate (38) away from the second compression plate (37); the self-adjusting member (39) is used to reset the third compression plate (38).

3. The defect detection device for automobile lamp production according to claim 1, characterized in that: A guide groove (211) is provided on the side wall of the long plate (21), and the two guide grooves (211) are arranged opposite to each other. The bottom of the short plate (22) is connected to the top of the guardrail (12), and the telescopic end of the telescopic cylinder (23) passes through the side wall of one of the short plates (22) and is connected to the telescopic bar (24).

4. The defect detection device for automobile lamp production according to claim 3 is characterized in that: The guide member (27) comprises a guide plate (271) symmetrically arranged in a radial direction on the top of the telescopic strip (24), and a guide roller (272) rotatably connected to a side of the guide plate (271) away from the telescopic strip (24); the guide roller (272) is capable of sliding in a corresponding guide groove (211).

5. The defect detection device for automobile lamp production according to claim 2, characterized in that: The movable member (28) comprises a fixed plate (281), a radial motor (282) arranged on the top of the fixed plate (281), a radial shaft (2821) arranged at the output end of the radial motor (282), a radial worm (2822) arranged on the radial shaft (2821), a first fixed slide rail (283) symmetrically arranged on the top of the fixed plate (281) in a radial direction, a first slide plate (2831) arranged on one side of the first fixed slide rail (283), a first arc track (284) arranged between the first slide plates (2831), and a first arc track (285) arranged between the first slide plates (2851). An axial motor (285) on one side of an arc track (284), an axial shaft (2851) arranged at the output end of the axial motor (285), an axial worm (2852) arranged on the axial shaft (2851), a second fixed slide rail (286) symmetrically arranged on the top of the fixed plate (281) in the axial direction, a second slide plate (2861) arranged on one side of the second fixed slide rail (286), a second arc track (287) arranged between the second slide plates (2861), and a movable plate (288) arranged above the first arc track (284); The fixed plate (281) is located at the top of the support seat (11), and the radial axis (2821) and the axial axis (2851) are connected to the top of the fixed plate (281) through a bearing seat. A first slide groove (2832) is provided on the side wall of the first fixed slide rail (283) close to the first slide plate (2831), and the two first slide grooves (2832) are relatively distributed. The first slide plate (2831) slides in the corresponding first slide groove (2832). The bottom of the first slide plate (2831) is evenly provided with first tooth blocks (2833), and the first tooth blocks (2833) are meshed with the corresponding radial worm (2822) for transmission.

6. The defect detection device for automobile lamp production according to claim 5, characterized in that: A second slide groove (2862) is provided on the side wall of the second fixed slide rail (286) close to the second slide plate (2861), the two second slide grooves (2862) are arranged opposite to each other, the second slide plate (2861) slides in the corresponding second slide groove (2862), second tooth blocks (2863) are evenly provided on the bottom of the second slide plate (2861), the second tooth blocks (2863) are meshed with the corresponding axial worm gear (2852) for transmission, the first arc track (284) and the second arc track (287) are arranged in a cross shape, and the first arc track (284) is located above the second arc track (287); A first rail block (2881) is disposed at the bottom of the movable plate (288); a second rail block (2882) is disposed on a side of the first rail block (2881) away from the movable plate (288); the first rail block (2881) slides in cooperation with the first arc-shaped track (284); the second rail block (2882) slides in cooperation with the second arc-shaped track (287); a clamping member (289) is further disposed at the top of the movable plate (288); the clamping member (289) is used to clamp and fix the transparent vehicle lamp cover.

7. The defect detection device for automobile lamp production according to claim 5, characterized in that: The compression assembly (3) is located on the movable plate (288), the bottom of the baffle plate (31) is connected to the top of the movable plate (288), the outer walls of the first compression cylinder (32) and the second compression cylinder (35) are both connected to the side wall of the movable plate (288), the second compression cylinder (35) is distributed obliquely, and the baffle plate (31), the first compression plate (34), the second compression plate (37) and the third compression plate (38) are arranged in a square shape.

8. The defect detection device for automobile lamp production according to claim 7, characterized in that: The self-adjusting member (39) comprises an adjusting plate (391), a spring (392) arranged in the adjusting plate (391), and a displacement block (393) arranged at one end of the spring (392); One end of the adjustment plate (391) is connected to the side wall of the movable plate (288); a displacement groove (394) is provided on the top of the adjustment plate (391); one end of the spring (392) away from the displacement block (393) is connected to the inner wall of the displacement groove (394); and one end of the displacement block (393) away from the spring (392) is connected to one end of the third compression plate (38) away from the second compression plate (37).

9. The defect detection device for automobile lamp production according to claim 1, characterized in that: The light tube (15) has a built-in control program, the control program is electrically connected to the visual sensor (16), the light tube (15) changes color according to the setting of the control program, and the colors of the light tube (15) include: red, white, and blue; The control program includes an input module, a control module, and a characterization module; The input module manually inputs the values ​​of the lamp, including length and thickness, and inputs different instructions to the control module according to different thickness value ranges corresponding to the length value; The control module controls the light tube (15) to change color, and the visual sensor (16) provides real-time feedback of the identified length to the control module; The representation module is used to receive the image signal transmitted by the visual sensor (16); The input module sends different instructions to the control module according to different input ranges, and the thickness range is: When the thickness value corresponding to the length value is within the range of 15-25 mm (excluding 25 mm), input 0 to the control module; When the thickness value corresponding to the length value is within the range of 25-35 mm (excluding 35 mm), input 1 to the control module; When the thickness value corresponding to the length value is within the range of 35-40 mm, input 2 to the control module; When the control module receives instruction 0, the color of the control light tube (15) changes to blue; when the control module receives instruction 1, the color of the control light tube (15) changes to white; and when the control module receives instruction 2, the color of the control light tube (15) changes to red.

10. A method for defect detection for automobile lamp production, using the defect detection device for automobile lamp production as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. When inspecting a transparent car lamp cover, the transparent car lamp cover can be first mounted on the movable part (28), and then the mechanical arm (13) is started, bringing the light tube (15) and the visual sensor (16) close to the surface of the transparent car lamp cover, so as to detect scratch defects on the surface of the transparent car lamp cover; S2. If the shallow scratches on the surface of the transparent lampshade are affected by the coating process in the previous step, making the shallow scratches difficult to detect, the telescopic cylinder (23) can be started, and its telescopic end pushes the telescopic bar (24) close to the top of the transparent lampshade, so that the spray pipe (25) and the spray head (26) are displaced synchronously. At this time, the spray head (26) can spray water droplets onto the surface of the transparent lampshade, so that the water droplets slide along the surface of the transparent lampshade. When the water droplets pass through the shallow scratches on the surface of the transparent lampshade, the water droplets will gather or flow irregularly. When the visual sensor (16) detects again, it can be judged whether there are scratches by the state of the water droplets; S3, during the operation of S2, the movable member (28) is started, and on the one hand, the transparent headlight cover can be clamped by the mechanism on the movable member (28), and on the other hand, the transparent headlight cover can be driven to swing in all directions, so that water drops slide repeatedly on the surface of the transparent headlight cover, and contact detection is performed on scratches in different directions, thereby ensuring the accuracy of scratch detection; S4. When the mechanical arm (13) drives the lamp tube (15) and the visual sensor (16) to approach the corner of the transparent headlight cover, the detection light will be refracted or reflected at the corner. The refracted and reflected rays will cause the light to have a higher intensity. The higher intensity of light will affect the detection accuracy of the sensor and the visibility of the scratches. Therefore, on the one hand, the first compression cylinder (32) is started, and its telescopic end pushes the first compression plate (34) to approach the transparent headlight cover through the first compression bar (33); on the other hand, the second compression cylinder (35) is started, and its telescopic end pushes the second compression plate (37) to approach the transparent headlight cover through the second compression bar (36). In this process, the second compression plate (37) also squeezes the third compression plate (38); thereby, the baffle plate (31), the first compression plate (34), the second compression plate (37) and the third compression plate (38) surround and block the four sides of the transparent headlight cover, thereby reducing the interference of external light and internal refracted or reflected light.

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