Automatic calibration device of exposure machine

Abstract

The invention relates to the technical field of exposure machine calibration, in particular to an automatic calibration device of an exposure machine. Comprising a base, a shell is arranged above the base, a rectangular frame is further included, the rectangular frame is fixedly connected to the base, a sliding rod I is connected to the rectangular frame in a sliding mode, and a C-shaped ladder frame is fixedly connected to the sliding rod I in a penetrating mode. According to the invention, the shading strips are arranged and gradually become smaller along with the round hole formed by the shading strips, so that the halo generated when the camera captures the annular mark of the PCB substrate and the round mark of the film is reduced, the camera can capture the clear marks of the PCB substrate and the film, and when the round hole formed by the shading strips becomes a small hole, the camera can capture the clear marks of the PCB substrate and the film. The camera can capture clearer marks of the PCB substrate and the film, so that the alignment precision of the PCB substrate and the film is improved, and calibration alignment between the PCB substrate and the film is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of exposure machine calibration, and particularly to an automatic calibration device for an exposure machine. Background Art

[0002] An exposure machine transfers the pattern on a film to a PCB substrate through ultraviolet light to realize the drawing of a circuit board on the PCB substrate.

[0003] The existing exposure machine captures circular marks on the film and annular marks on the PCB substrate through a camera, and then aligns the film and the PCB substrate by comparing the concentricity of the ring and the dot. However, this method is easily affected by the light source intensity, and has high requirements for the resolution of the camera. Moreover, the camera is affected by more stray light in the yellow light environment where the exposure machine is located, resulting in blurring when the camera calibrates the film and the PCB substrate. Therefore, there is an urgent need for an automatic calibration device for an exposure machine that can effectively improve the calibration accuracy of the camera, improve the recognition accuracy of the camera, and at the same time judge the exposure error of the exposure machine. Summary of the Invention

[0004] In order to overcome the shortcomings in the prior art, the present invention provides an automatic calibration device for an exposure machine.

[0005] Technical Solution: An automatic calibration device for an exposure machine includes a base, an outer shell is arranged above the base, and further includes a rectangular frame. The rectangular frame is fixedly connected to the base. A sliding rod I is slidably connected to the rectangular frame. A C-shaped stepped frame is fixedly connected to the sliding rod I in a penetrating manner. Convex strips are fixedly connected to the adjacent sides of the C-shaped stepped frame, and sliding rods II are fixedly connected to the C-shaped stepped frame in a rectangular distribution. The bottom sliding rod II penetrates through the convex strip and is slidably connected to a slider I in a penetrating manner. Support plates are fixedly connected to the bottoms of the sliders I. A rotating ring is rotatably connected to the tops of the support plates. A plurality of light-shielding strips are arranged in a circumferential array on the tops of the support plates. The light-shielding strips are slidably connected to the bottoms of the rotating rings.

[0006] Preferably, it further includes a toothed ring. The toothed ring is fixedly connected to the rotating ring. A moving block I is slidably connected to the top sliding rods II in a mirror image distribution. A support rod is fixedly connected to one side of the moving block I. A rack is fixedly connected to the bottom of the support rod. The rack meshes with the toothed ring.

[0007] Preferably, it further includes a motor I. A motor I is arranged on one side of the C-shaped stepped frame. The output shaft of the motor I is fixedly connected to a bidirectional lead screw. The bidirectional lead screw penetrates through the C-shaped stepped frame and is threadedly connected to the moving block I.

[0008] Preferably, it further includes a roller I. The bottom of the moving block I is rotatably connected to the roller I. An irregular rotating groove I is formed at the top of the slider I. An arc-shaped frame I is rotatably connected in the irregular rotating groove I. The arc-shaped frame I contacts the roller I, and a first elastic member is provided between the irregular rotating groove I and the arc-shaped frame I. A push block II is fixedly connected to the bottom of the slider I. A calibration unit is provided on the base, and the calibration unit is used for placing the PCB substrate and the film.

[0009] Preferably, the calibration unit includes an electric push rod I. The electric push rod I is installed on the base in a rectangular distribution. The output ends of the electric push rod I are jointly rotatably connected to a first placement platform. The base is slidably clamped with support frames in a rectangular distribution. The support frames are jointly fixedly connected to a second placement platform. The second placement platform contacts the top of the first placement platform.

[0010] Preferably, it further includes an electric push rod II. The electric push rod II is fixedly installed on the rectangular frame. The output end of the electric push rod II penetrates through one side of the rectangular frame and is fixedly connected to a moving block II. The bottom of the moving block II is rotatably connected to a roller II. An irregular rotating groove II is formed at the top of the C-shaped stepped frame. An arc-shaped frame II is rotatably connected in the irregular rotating groove II. The arc-shaped frame II contacts the roller II, and a second elastic member is provided between the irregular rotating groove II and the arc-shaped frame II. A push block II is fixedly connected to the bottom of the C-shaped stepped frame.

[0011] Preferably, it further includes an L-shaped sliding frame. Horizontal sliding grooves are symmetrically distributed on one side of the C-shaped stepped frame. The L-shaped sliding frame is slidably connected in the horizontal sliding grooves. An installation plate is fixedly connected to one side of the L-shaped sliding frame. A clamping frame is fixedly connected to the installation plate. The bottom of the clamping frame is fixedly connected to a guiding frame through a column. A guiding sliding groove is formed on one side of the guiding frame. A slider II is slidably connected in the guiding sliding groove. A camera is fixedly connected to one side of the slider II.

[0012] Preferably, it further includes a connecting frame. The bottom of the L-shaped sliding frame is fixedly connected to the connecting frame. One end of the connecting frame is fixedly connected to the support disc.

[0013] Preferably, it further includes a motor II. The motor II is fixedly installed on the installation plate. The output shaft of the motor II penetrates through the installation plate and is fixedly connected to a winding ring. A traction rope is wound around the winding ring. The traction rope penetrates through the guiding frame and is fixedly connected to the slider II. A third elastic member is connected between the slider II and the guiding sliding groove.

[0014] Preferably, it further includes a laser lamp. The laser lamp is installed on the top of the clamping frame. A boat-shaped switch is installed on the installation plate. The boat-shaped switch cooperates with the slider II, and the boat-shaped switch is electrically connected to the laser lamp.

[0015] The beneficial effects of the present invention are as follows: 1. By setting light-shielding strips in the present invention, as the circular holes formed by the light-shielding strips gradually become smaller, the light diffusely reflected from the PCB substrate is reduced when propagating towards the camera, thereby reducing the halation when the camera captures the circular marks on the PCB substrate and the circular marks on the film, making it easier for the camera to capture the clear circular marks on the PCB substrate and the circular marks on the film. And when the circular holes formed by the light-shielding strips become small holes, the light diffusely reflected from the PCB substrate will form a phenomenon of small hole imaging when passing through the small holes formed by the light-shielding strips, enabling the camera to capture more clear and inverted circular marks on the PCB substrate and the circular marks on the film, thereby improving the accuracy when aligning the PCB substrate and the film and contributing to the calibration and alignment between the PCB substrate and the film.

[0016] 2. By setting a laser lamp in the present invention, the laser lamp irradiates the laser vertically downward, leaving a red laser dot at the center of the circular mark on the PCB substrate and passing through the circular mark on the PCB substrate. The laser of the laser lamp irradiates on the circular mark on the film and leaves another red laser dot. By comparing the distance between the two laser dots in the image captured by the camera, the influence of the distance between the PCB substrate and the film on the exposure and transfer of the film can be judged, further improving the distance detection accuracy between the film and the PCB substrate, so that the exposure machine adjusts its own energy output to compensate for the distance detection accuracy between the film and the PCB substrate to ensure the best exposure effect.

[0017] 3. By setting a slider II in the present invention, the slider II drives the camera to slide synchronously during the sliding process, thereby tilting the viewing angle of the camera. The higher the tilting angle of the camera, the closer the viewing angle of the camera is to being perpendicular to the direction of the laser, thus avoiding viewing angle distortion of the camera, thereby improving the detection accuracy of the distance between the film and the PCB substrate. And the sliding process of the camera provides multiple viewing angles for the detection of the distance between the film and the PCB substrate, thereby improving the detection quality of the distance between the film and the PCB substrate. Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the base of the present invention; Figure 3 is the structural schematic diagram of the C-shaped step frame of the present invention; Figure 4 is the sectional view of the C-shaped step frame of the present invention; Figure 5 is the sectional view of the support disk of the present invention; Figure 6 is the sectional view of the slider I of the present invention; Figure 7Schematic diagram of the moving block Ⅱ of the present invention; Figure 8 Sectional view of the moving block Ⅱ of the present invention; Figure 9 Schematic diagram of the mounting plate of the present invention; Figure 10 Exploded view of the mounting plate and the clamping frame of the present invention; Figure 11 Schematic diagram of the calibration unit of the present invention; Figure 12 Exploded view of the calibration unit of the present invention; Figure 13 Sectional view of the calibration unit of the present invention.

[0019] In the above drawings: 1 - base, 2 - outer shell, 3 - rectangular frame, 4 - slide bar Ⅰ, 5 - C-shaped stepped frame, 501 - horizontal chute, 6 - rib, 7 - slide bar Ⅱ, 8 - slider Ⅰ, 9 - support plate, 10 - rotating ring, 11 - light-shielding strip, 12 - toothed ring, 13 - moving block Ⅰ, 14 - support rod, 15 - rack, 16 - motor Ⅰ, 17 - bidirectional lead screw, 18 - roller Ⅰ, 19 - arc-shaped frame Ⅰ, 20 - push block Ⅰ, 21 - calibration unit, 211 - electric push rod Ⅰ, 212 - first placement platform, 213 - support frame, 214 - second placement platform, 22 - electric push rod Ⅱ, 23 - moving block Ⅱ, 24 - roller Ⅱ, 25 - arc-shaped frame Ⅱ, 26 - push block Ⅱ, 27 - L-shaped sliding frame, 28 - mounting plate, 29 - clamping frame, 30 - guiding frame, 301 - guiding chute, 31 - slider Ⅱ, 32 - camera, 33 - connecting frame, 34 - motor Ⅱ, 35 - winding ring, 36 - traction rope, 37 - laser lamp, 38 - ship-shaped switch. Detailed implementation mode

[0020] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which the presently preferred embodiments of the invention are shown. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and fully convey the scope of the invention to those skilled in the art.

[0021] Embodiment 1: An automatic calibration device for an exposure machine, as Figures 1-6As shown in the figure, it includes a base 1, with a housing 2 fixedly connected above the base 1. It also includes a rectangular frame 3. Two rectangular frames 3 are fixedly connected to the base 1 in a mirror image distribution. Four slide bars I 4 distributed in a rectangle are slidably connected to both of the two rectangular frames 3. A C-shaped stepped frame 5 is fixedly connected through the bottom two slide bars I 4. Protrusions 6 are fixedly connected to the adjacent sides of the C-shaped stepped frame 5. And four slide bars II 7 are fixedly connected to the C-shaped stepped frame 5 in a rectangular distribution. The bottom two slide bars II 7 jointly penetrate through the protrusion 6 and are slidably connected through two sliders I 8. The two sliders I 8 are respectively located at both ends of the bottom slide bar II 7. Support plates 9 are fixedly connected to the bottoms of the sliders I 8. A rotating ring 10 is rotatably connected to the top of the support plate 9. And a number of light-shielding strips 11 are arranged in a circular array on the top of the support plate 9. The number of light-shielding strips 11 forms a circular hole shape at the center of the rotating ring 10. A number of rectangular sliding grooves are opened at the bottom of the rotating ring 10. And the top of the light-shielding strip 11 is cylindrical, so that the light-shielding strip 11 is slidably connected to the bottom of the rotating ring 10.

[0022] As Figure 5 shown, it also includes a toothed ring 12. The toothed ring 12 is fixedly connected to the rotating ring 10. On the top slide bars II 7, two moving blocks I 13 are slidably connected in a mirror image distribution. A support rod 14 is fixedly connected to one side of the moving block I 13. A rack 15 is fixedly connected to the bottom of the support rod 14. The rack 15 meshes with the toothed ring 12. When the moving block I 13 is misaligned with the slider I 8, the toothed ring 12 can be driven to rotate through the support rod 14 and the rack 15, so that the toothed ring 12 adjusts the size of the circular hole formed by the light-shielding strips 11 through the rotation of the rotating ring 10.

[0023] As Figure 4 Figure 6 shown, it also includes a motor I 16. A motor I 16 is installed on one side of the C-shaped stepped frame 5. A bidirectional lead screw 17 is fixedly connected to the output shaft of the motor I 16. The bidirectional lead screw 17 penetrates through the C-shaped stepped frame 5 and is threadedly connected to the moving block I 13, so that the mirror-image distributed moving blocks I 13 approach or move away from each other.

[0024] As Figure 6 shown, it also includes a roller I 18. The roller I 18 is rotatably connected to the bottom of the moving block I 13. A special-shaped rotating groove I is opened at the top of the slider I 8. An arc-shaped frame I 19 is rotatably connected in the special-shaped rotating groove I. The arc-shaped frame I 19 contacts with the roller I 18. And a first elastic member is arranged between the special-shaped rotating groove I and the arc-shaped frame I 19. A push block II 20 is fixedly connected to the bottom of the slider I 8. A calibration unit 21 is fixedly connected to the base 1. The calibration unit 21 is used to place the PCB substrate and the film. The material at the marked place on the PCB substrate is transparent resin. The mark on the PCB substrate is an annular mark, while the mark on the film is a circular mark.

[0025] As Figures 11-13As shown in the figure, the calibration unit 21 includes an electric push rod Ⅰ211. The electric push rod Ⅰ211 is installed on the base 1 in a rectangular distribution. The output ends of the electric push rod Ⅰ211 are jointly rotatably connected to a first placement platform 212. The first placement platform 212 is used to place a film with a transparent part. The base 1 is slidably clamped with support frames 213 in a rectangular distribution. The support frames 213 are jointly fixed to a second placement platform 214. The second placement platform 214 is used to place a PCB substrate with a thickness greater than that of the film. The top of the second placement platform 214 is slightly lower than the push block Ⅱ20, so that the push block Ⅱ20 can effectively push the PCB substrate to move. The second placement platform 214 contacts the top of the first placement platform 212. When the film is placed, it is located between the second placement platform 214 and the first placement platform 212 and does not contact the second placement platform 214.

[0026] As Figure 7 shown, it also includes an electric push rod Ⅱ22. The electric push rod Ⅱ22 is fixedly installed on the rectangular frame 3. The output end of the electric push rod Ⅱ22 penetrates through one side of the rectangular frame 3 and is fixedly connected to a moving block Ⅱ23. The bottom of the moving block Ⅱ23 is rotatably connected to a roller Ⅱ24. An irregular rotation groove Ⅱ is opened at the top of the C-shaped stepped frame 5. An arc-shaped frame Ⅱ25 is rotatably connected in the irregular rotation groove Ⅱ. The arc-shaped frame Ⅱ25 contacts the roller Ⅱ24, and a second elastic member is arranged between the irregular rotation groove Ⅱ and the arc-shaped frame Ⅱ25. The bottom of the C-shaped stepped frame 5 is fixedly connected to a push block Ⅱ26. The bottom position of the push block Ⅱ26 is slightly higher than the second placement platform 214, so that the push block Ⅱ26 can effectively push the PCB substrate to move.

[0027] As Figure 3 、 Figures 4-9 shown, it also includes an L-shaped sliding frame 27. Horizontal sliding grooves 501 are mirror-distributed on one side of the C-shaped stepped frame 5. The L-shaped sliding frames 27 are slidably connected in the horizontally mirror-distributed sliding grooves 501. One side of the L-shaped sliding frame 27 is fixedly connected to a mounting plate 28. A clamping frame 29 is fixedly connected to the mounting plate 28. The bottom of the clamping frame 29 is fixedly connected to a guiding frame 30 through a column. A guiding sliding groove 301 is opened on one side of the guiding frame 30. A slider Ⅱ31 is slidably connected in the guiding sliding groove 301. One side of the slider Ⅱ31 is fixedly connected to a camera 32. The orientation of the camera 32 always aims at the center of the support disk 9. When the line of sight of the camera 32 is vertical, it is always on the same vertical line as the center of the circular mark of the film and the center of the annular mark of the PCB substrate.

[0028] As Figure 9As shown in the figure, it further includes a connecting frame 33. Connecting frames 33 are fixedly connected to the bottoms of the L-shaped sliding frames 27 which are mirror-image distributed on one side of the C-shaped stepped frame 5. One end of the connecting frame 33 is fixedly connected to the adjacent support disk 9. Thus, during the movement of the support disk 9, the L-shaped sliding frame 27 will be driven to move synchronously through the connecting frame 33, and the L-shaped sliding frame 27 will drive the clamping frame 29 to move through the mounting plate 28. Consequently, the clamping frame 29 will drive the camera 32 on the slider II 31 to move through the upright column and the guiding frame 30.

[0029] As Figure 10 shown in the figure, it further includes a motor II 34. The motor II 34 is fixedly installed on the mounting plate 28. The output shaft of the motor II 34 penetrates through the mounting plate 28 and is fixedly connected to a winding ring 35. A traction rope 36 is wound around the winding ring 35. The traction rope 36 penetrates through the guiding frame 30 and is fixedly connected to the slider II 31. A third elastic member is connected between the slider II 31 and the guiding chute 301. When the motor II 34 rotates, it will control the length of the traction rope 36 in the guiding chute 301 through the winding ring 35, thereby controlling the position of the slider II 31 in the guiding chute 301.

[0030] As Figure 9 and Figure 10 shown in the figure, it further includes a laser lamp 37. The laser lamp 37 is fixedly connected to the top of the clamping frame 29. A boat-shaped switch 38 is installed on the mounting plate 28. One side of the slider II 31 is spherical, so that the boat-shaped switch 38 cooperates with the slider II 31. When the slider II 31 moves, it can turn on or off the boat-shaped switch 38, and the boat-shaped switch 38 is electrically connected to the laser lamp 37.

[0031] In the initial state, the two C-shaped stepped frames 5 are far away from each other, and the support frame 213 is not clamped on the base 1. At this time, the staff opens the rotating door of the housing 2 and places the film at the center of the top of the first placement platform 212. Subsequently, the staff places the second placement platform 214 above the first placement platform 212, slides the support frame 213 on the second placement platform 214 into the base 1 in a clamped manner, and places the PCB substrate at the center of the top of the second placement platform 214. At this time, the placement of the film and the PCB substrate is completed. Subsequently, the staff closes the rotating door of the housing 2 and starts the device for calibration.

[0032] When calibrating the position of the PCB substrate and the film, the staff first move the PCB substrate. The staff start the electric push rod II 22, so that the output end of the electric push rod II 22 drives the moving block II 23 to move, thereby enabling the moving block II 23 to squeeze the arc-shaped frame II 25 through the roller II 24, causing the arc-shaped frame II 25 to drive the C-shaped stepped frame 5 to move synchronously with the roller II 24. On the one hand, during the movement of the C-shaped stepped frame 5, it drives the push block II 26 to move synchronously until the push block II 26 moves above the second placement platform 214 and squeezes the side of the PCB substrate. At this time, the PCB substrate moves due to the lateral extrusion until the two push blocks II 26 simultaneously squeeze the side of the PCB substrate. At this time, the roller II 24 continues to move, causing the roller II 24 to squeeze the arc-shaped frame II 25. The arc-shaped frame II 25 rotates and compresses the second elastic member, enabling the roller II 24 to cross over the arc-shaped frame II 25 and move above the PCB substrate, so that the arc-shaped frame II 25 drives the push block II 26 to closely adhere to the PCB substrate without exerting excessive pressure on the PCB substrate, avoiding the PCB substrate from being bent or even cracked due to excessive pressure in the left and right directions, and the two push blocks II 26 simultaneously push the PCB substrate, thereby enabling the effective and rapid left and right positioning of the PCB substrate. On the other hand, during the movement of the C-shaped stepped frame 5, it drives the sliding rod II 7 to move synchronously, causing the sliding rod II 7 to drive the slider I 8 and the moving block I 13 to move synchronously. When the C-shaped stepped frame 5 stops moving, it indicates that the PCB substrate has completed the left and right positioning. The staff start the motor I 16, so that the output shaft of the motor I 16 rotates to drive the bidirectional lead screw 17 to rotate synchronously. The rotation of the bidirectional lead screw 17 drives the moving block I 13 to move in the front and back directions. The two moving blocks I 13 approach each other and squeeze the arc-shaped frame I 19 through the rollers I 18, causing the arc-shaped frame I 19 to drive the slider I 8 to slide on the sliding rod II 7. During the sliding process of the slider I 8, it drives the push block I 20 to move, enabling the push block I 20 to contact the front and back sides of the PCB substrate and push the PCB substrate to move back and forth. When the PCB substrate is simultaneously contacted and squeezed by the two push blocks I 20, the roller I 18 continues to move and squeeze the arc-shaped frame I 19, causing the arc-shaped frame I 19 to rotate and compress the first elastic member, enabling the roller I 18 to cross over the arc-shaped frame I 19, so that the arc-shaped frame I 19 drives the push block I 20 to closely adhere to the PCB substrate without exerting excessive pressure on the PCB substrate, avoiding the PCB substrate from being bent or even cracked due to excessive pressure in the front and back directions, and the two push blocks I 20 simultaneously push the PCB substrate, thereby enabling the effective and rapid front and back positioning of the PCB substrate. At this time, the PCB substrate is positioned.

[0033] During the movement of the slider I 8, the slider I 8 drives the support disk 9 to move, causing the support disk 9 to drive the rotating ring 10 and the light-shielding strip 11 to move synchronously. When the slider I 8 remains stationary with the push block I 20, the support disk 9 drives the rotating ring 10 and the light-shielding strip 11 to be stationary synchronously with the slider I 8. At this time, the center of the support disk 9 is located directly above the circular mark on the PCB substrate. Subsequently, the moving block I 13 continues to move, causing the moving block I 13 to drive the support rod 14 to move, so that the support rod 14 drives the rack 15 to move synchronously. The rack 15 drives the toothed ring 12 to rotate, so that the toothed ring 12 drives the light-shielding strip 11 to rotate synchronously through the rotating ring 10. The circular hole formed by the light-shielding strips 11 gradually becomes smaller. It should be noted that during the movement of the support disk 9, the support disk 9 drives the L-shaped sliding frame 27 to slide synchronously in the horizontal sliding groove 501 of the C-shaped stepped frame 5 through the connecting frame 33. During the movement of the L-shaped sliding frame 27, the mounting plate 28 drives the clamping frame 29 to move synchronously, so that the clamping frame 29 drives the guiding frame 30 to move synchronously through the upright column. The guiding frame 30 drives the camera 32 to move synchronously, so that the camera 32 is always located directly above the center of the support disk 9. As the circular hole formed by the light-shielding strips 11 gradually becomes smaller, the light diffusely reflected from the PCB substrate is reduced when propagating towards the camera 32, thereby reducing the halo when the camera 32 captures the circular mark on the PCB substrate and the circular mark on the film, making it easier for the camera 32 to capture the clear circular mark on the PCB substrate and the circular mark on the film. Moreover, when the circular hole formed by the light-shielding strips 11 becomes a small hole, the light diffusely reflected from the PCB substrate forms a small hole imaging phenomenon when passing through the small hole formed by the light-shielding strips 11, enabling the camera 32 to capture a clearer and inverted circular mark on the PCB substrate and the circular mark on the film, thereby improving the accuracy when aligning the PCB substrate and the film, contributing to the calibration and alignment between the PCB substrate and the film. And when the circular hole formed by the light-shielding strips 11 is the same size as the circular mark on the film, the light-shielding strip 11 just covers the edge of the circular mark on the film, thereby effectively improving the calibration detection accuracy of detecting the film and the PCB substrate, contributing to the high-precision alignment between the film and the PCB substrate. Based on the position captured by the camera 32, adjust the length of the electric push rod I 211, so that the output end of the electric push rod I 211 adjusts the positions of the four corners of the first placement platform 212 on the base 1, thereby adjusting the position of the film relative to the PCB substrate, aligning the circular mark on the film plate with the circular mark on the PCB substrate, and thus realizing the automatic calibration between the PCB substrate and the film.

[0034] During the calibration process between the PCB substrate and the film, the exposure and transfer effect of the film is also affected by the distance between the film and the PCB substrate. The farther the distance between the film and the PCB substrate, the worse the accuracy of the pattern on the film when it is exposed and transferred to the PCB substrate. Therefore, it is necessary to detect the distance between the PCB substrate and the film, determine whether the PCB substrate can be effectively transferred, and adjust the ultraviolet lamp included in the exposure machine to enable the PCB substrate to receive a better exposure effect. Therefore, the staff can start the motor II 34 during the calibration process between the PCB substrate and the film, so that the output shaft of the motor II 34 drives the winding ring 35 to rotate, and the winding ring 35 releases the traction rope 36. The slider II 31 loses the restriction of the traction rope 36, and the third elastic member pushes the slider II 31. The slider II 31 drives the camera 32 to move synchronously, causing the viewing angle of the camera 32 to tilt. During the movement of the slider II 31, it squeezes the boat-shaped switch 38, causing the boat-shaped switch 38 to activate the laser lamp 37. The laser lamp 37 emits laser vertically downward, leaving a red laser dot at the center of the circular mark on the PCB substrate and passing through the circular mark on the PCB substrate. The laser of the laser lamp 37 leaves another red laser dot on the circular mark of the film. It should be noted that the ultraviolet lamp, as one of the features of the exposure machine (which is prior art, so its working principle will not be elaborated), the output of the ultraviolet light of the exposure machine is related to the distance between the PCB substrate and the film. In the case where the distance between the PCB substrate and the film is very close, different distances between the PCB substrate and the film correspond to different ultraviolet light outputs. By comparing the distance between the two laser dots in the image captured by the camera 32, the influence of the distance between the PCB substrate and the film on the exposure and transfer of the film can be judged, further improving the detection accuracy of the distance between the film and the PCB substrate. Thus, the exposure machine adjusts the energy output of the ultraviolet light to compensate for the detection accuracy of the distance between the film and the PCB substrate to ensure the best exposure effect. It should be noted that the higher the tilt angle of the camera 32, the closer the viewing angle of the camera 32 is to being perpendicular to the laser, thus avoiding the viewing angle distortion of the camera and improving the detection accuracy of the distance between the film and the PCB substrate by the camera 32. Moreover, the sliding process of the camera 32 provides multiple viewing angles for the detection of the distance between the film and the PCB substrate, thus improving the detection quality of the distance between the film and the PCB substrate. The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An automatic calibration device for an exposure machine, comprising a base (1), a housing (2) being arranged above the base (1), characterized in that: It also comprises a rectangular frame (3), the rectangular frame (3) being fixedly connected to the base (1), a slide bar I (4) being slidably connected to the rectangular frame (3), a C-shaped step frame (5) being fixedly connected to the slide bar I (4) in a through-type manner, a convex strip (6) being fixedly connected to the adjacent side of the C-shaped step frame (5), and slide bars II (7) being fixedly connected to the C-shaped step frame (5) in a rectangular distribution, the slide bar II (7) at the bottom penetrating the convex strip (6) and being slidably connected to the slide bar I (8), the bottom of the slide bar I (8) being fixedly connected to a support plate (9), the top of the support plate (9) being rotatably connected to a rotating ring (10), and a plurality of shading strips (11) being arranged in a circular array on the top of the support plate (9), the shading strips (11) being slidably connected to the bottom of the rotating ring (10).

2. The automatic calibration device for an exposure machine according to claim 1, characterized in that: It also includes a gear ring (12), the gear ring (12) is fixedly connected to the rotating ring (10), and a moving block I (13) is slidably connected to the sliding rod II (7) located at the top in a mirror-image distribution, and a support rod (14) is fixedly connected to one side of the moving block I (13), and a rack (15) is fixedly connected to the bottom of the support rod (14), and the rack (15) is meshed with the gear ring (12).

3. The automatic calibration device for an exposure machine according to claim 2, characterized in that: It also includes a motor I (16), which is arranged on one side of the C-shaped ladder frame (5), and the output shaft of the motor I (16) is fixedly connected to a bidirectional screw rod (17), which passes through the C-shaped ladder frame (5) and is threadedly connected to the moving block I (13).

4. The automatic calibration device for an exposure machine according to claim 2, characterized in that: The invention also comprises a roller I (18), the bottom of the moving block I (13) is rotatably connected to the roller I (18), the top of the slider I (8) is provided with a special-shaped rotation groove I, an arc frame I (19) is rotatably connected in the special-shaped rotation groove I, the arc frame I (19) is in contact with the roller I (18), and a first elastic member is provided between the special-shaped rotation groove I and the arc frame I (19), the bottom of the slider I (8) is fixedly connected to a push block II (20), and the base (1) is provided with a calibration unit (21), and the calibration unit (21) is used to place a PCB substrate and a film.

5. The automatic calibration device for an exposure machine according to claim 4, characterized in that: The calibration unit (21) comprises an electric push rod I (211), the electric push rods I (211) are installed in a rectangular distribution on the base (1), the output ends of the electric push rods I (211) are rotatably connected to a first placement platform (212), a support frame (213) is slidably connected to the base (1) in a rectangular distribution, the support frame (213) is fixedly connected to a second placement platform (214), and the second placement platform (214) is in contact with the top of the first placement platform (212).

6. The automatic calibration device for an exposure machine according to claim 1, characterized in that: Also includes An electric push rod II (22) is fixedly mounted on the rectangular frame (3), an output end of the electric push rod II (22) passes through one side of the rectangular frame (3) and is fixedly connected to a moving block II (23), a roller II (24) is rotatably connected to the bottom of the moving block II (23), a special-shaped rotating groove II is opened on the top of the C-shaped step frame (5), an arc frame II (25) is rotatably connected in the special-shaped rotating groove II, the arc frame II (25) is in contact with the roller II (24), and a second elastic member is provided between the special-shaped rotating groove II and the arc frame II (25), and a push block II (26) is fixedly connected to the bottom of the C-shaped step frame (5).

7. The automatic calibration device for an exposure machine according to claim 6, characterized in that: The invention also comprises an L-shaped sliding frame (27), a horizontal sliding groove (501) is provided on one side of the C-shaped ladder frame (5) in a mirror-image distribution, the L-shaped sliding frame (27) is slidably connected in the horizontal sliding groove (501), a mounting plate (28) is fixedly connected to one side of the L-shaped sliding frame (27), a clamping frame (29) is fixedly connected to the mounting plate (28), a guide frame (30) is fixedly connected to the bottom of the clamping frame (29) via a column, a guide sliding groove (301) is provided on one side of the guide frame (30), a slider II (31) is slidably connected in the guide sliding groove (301), and a camera (32) is fixedly connected to one side of the slider II (31).

8. The automatic calibration device for an exposure machine according to claim 7, characterized in that: It also includes a connecting frame (33), the bottom of the L-shaped sliding frame (27) is fixedly connected to the connecting frame (33), and one end of the connecting frame (33) is fixedly connected to the supporting plate (9).

9. The automatic calibration device for an exposure machine according to claim 7, characterized in that: It also includes a motor II (34), the motor II (34) is fixedly mounted on the mounting plate (28), the output shaft of the motor II (34) passes through the mounting plate (28) and is fixedly connected to a winding ring (35), a traction rope (36) is wound around the winding ring (35), the traction rope (36) passes through the guide frame (30) and is fixedly connected to the slider II (31), and a third elastic member is connected between the slider II (31) and the guide slide groove (301).

10. The automatic calibration device of an exposure machine according to claim 7, characterized in that: It also includes a laser light (37), the laser light (37) being mounted on the top of the clamping frame (29), a rocker switch (38) being mounted on the mounting plate (28), the rocker switch (38) being matched with the slider II (31), and the rocker switch (38) being electrically connected to the laser light (37).

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