A laser measuring instrument for flatness of a plate

Abstract

The application relates to the technical field of laser measurement, in particular to a plate flatness laser measuring instrument, which comprises a supporting base, the top of the supporting base is fixedly connected with two air floating guide rails, the air floating guide rails are both slidably connected with first sliding seats, the top of the first sliding seats is fixedly connected with supporting plates, the supporting base is fixedly connected with a first mounting frame and a second mounting frame, the top surface of the first mounting frame is fixedly connected with a liquid storage shell; the water-soluble polyvinyl alcohol solution is sprayed to form a water-soluble polyvinyl alcohol coating on the surface of the plate, so that the reflectivity of laser is ensured when a laser scanner scans the plate, the transparent material and the black composite material of the plate are prevented from causing laser penetration and absorption, and the reflected signal in the laser measurement process is improved, so that the precision of the laser measurement is ensured.

Description

Technical Field

[0001] This invention relates to the field of laser measurement technology, and in particular to a laser measuring instrument for the flatness of sheet metal. Background Technology

[0002] Laser flatness measurement utilizes the high directionality and monochromaticity of laser light to detect surface flatness in a non-contact manner. It primarily employs laser interferometry or triangulation. After scanning multiple points on the surface being measured, the system uses an algorithm to fit a reference plane, calculates the maximum deviation between each measuring point and the reference, and finally quantifies the surface flatness as a flatness tolerance value. The accuracy can reach the micrometer level, making it suitable for precision manufacturing inspection.

[0003] Patent document CN113932730B discloses a device for detecting the shape of curved sheet metal, comprising: a central control console, a left longitudinal slide rail, a left trolley, a gantry frame, a top trolley, a laser rangefinder, a right trolley, a right longitudinal slide rail, and a transverse slide rail. The left trolley is located on the left longitudinal slide rail, the right trolley is located on the right longitudinal slide rail, the gantry frame spans across the left and right trolleys, the transverse slide rail is fixed to the gantry frame, the top trolley is located on the transverse slide rail, the laser rangefinder is fixed below the top trolley, and the curved sheet metal to be tested is placed between the left and right longitudinal slide rails.

[0004] In existing technologies, when measuring the flatness of sheet metal using laser, multi-point measurements are typically performed by contact scanning between the laser and the sheet surface. When the sheet metal is made of transparent material, the laser will penetrate, causing the surface reflection signal to be lost. When the sheet metal is made of black composite material, most of the laser will be absorbed during measurement, resulting in a weak reflected signal that cannot be detected, thus affecting the accuracy of laser measurement. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a laser measuring instrument for the flatness of sheet metal.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a laser measuring instrument for the flatness of a sheet metal, comprising a support base, two air-bearing guide rails fixedly connected to the top of the support base, a first slide block slidably connected to each of the air-bearing guide rails, a support plate fixedly connected to the top of each of the first slide blocks, and a limit clamping mechanism connected to each of the support plates;

[0007] The support base is fixedly connected to a first mounting bracket and a second mounting bracket. A liquid storage shell is fixedly connected to the top surface inside the first mounting bracket. Multiple spray pipes are fixedly connected to the bottom of the liquid storage shell. A straight nozzle is fixedly connected to the bottom end of each spray pipe. A first electric control valve is fixedly installed on each spray pipe. An inlet pipe is fixedly connected to the top of the liquid storage shell. A laser scanner is fixedly installed on the top surface inside the second mounting bracket.

[0008] A sleeve frame is provided on the side of the first mounting bracket away from the second mounting bracket. A movable sleeve mechanism is connected to the sleeve frame. The movable sleeve mechanism drives the sleeve frame to move synchronously with the plate and sleeve it on the plate during the movement. A scraper is provided above the sleeve frame. Multiple fixing strips are fixedly connected between the scraper and the first mounting bracket.

[0009] Preferably, the movable sleeve mechanism includes two strip frames, which are respectively fixedly connected to both sides inside the first mounting frame. A second slide block is slidably connected inside each strip frame, and a U-shaped frame is fixedly connected to each second slide block. Movable plates are fixedly connected to both sides of each sleeve frame, and the movable plates are slidably connected inside the corresponding U-shaped frame. A first hydraulic cylinder is fixedly installed on the top of each U-shaped frame, and the piston shaft of the first hydraulic cylinder passes through the corresponding U-shaped frame and is fixedly connected to the top of the corresponding movable plate.

[0010] Preferably, the limiting clamping mechanism includes two guide grooves, both of which are formed on the support plate. A sliding strip is slidably connected inside each guide groove, and a limiting strip is fixedly connected to each sliding strip. A first circular pin is fixedly connected to the bottom of each sliding strip. A guide strip is slidably connected to the bottom of the support plate, and a strip-shaped groove is formed on the guide strip. The first circular pin is located inside the strip-shaped groove. A second hydraulic cylinder is fixedly installed at the bottom of the support plate, and the piston shaft of the second hydraulic cylinder is fixedly connected to the guide strip.

[0011] Preferably, a recycling bin is provided at one end of the support base, multiple support rods are fixedly connected inside the recycling bin, a spray dissolving structure is connected to the top of the recycling bin, and a plate transfer mechanism is connected to the support base.

[0012] Preferably, the sheet material transfer mechanism includes two fixed plates, which are fixedly connected to both sides of the support base. A U-shaped plate is fixedly connected to each adjacent side of the two fixed plates. A U-shaped groove is formed on the U-shaped plate. Horizontal slide rails are provided above and below the U-shaped plates, and each horizontal slide rail is fixedly connected to its corresponding fixed plate. A horizontal slide block is slidably connected to each horizontal slide rail, and a longitudinal slide block is fixedly connected to each horizontal slide block. Two adjacent longitudinal slide blocks are slidably connected to a longitudinal slide rail. A second circular pin is fixedly connected to the longitudinal slide rail, with one end of the second circular pin located inside the corresponding U-shaped groove. A rotating shaft is rotatably connected to the fixed plate, and a rotating bar is fixedly connected to one end of the rotating shaft. A sliding groove is formed on the rotating bar and slidably fits onto the corresponding second circular pin. A swing cylinder is fixedly installed on the fixed plate, and the piston shaft of the swing cylinder is fixedly connected to the corresponding rotating shaft. A fixed frame is fixedly connected between the two longitudinal slide rails, and multiple first vacuum suction cups are fixedly installed at the bottom of the fixed frame.

[0013] Preferably, the spray dissolving structure includes a shielding frame, which is fixedly connected to the top of the recycling bin. A spray frame is fixedly connected to the top of the shielding frame. A water storage shell is fixedly connected to the top surface inside the spray frame. Multiple spray heads are fixedly connected to the bottom of the water storage shell. A water inlet pipe is fixedly connected to the top of the water storage shell. A second electrically controlled valve is fixedly installed at the top end of the water inlet pipe after passing through the spray frame and extending above the spray frame.

[0014] Preferably, the top of both the shielding frame and the recycling bin is tilted to one side, and the support rod is flush with the top of the recycling bin.

[0015] Preferably, the shielding frame has a clearance opening on the downwardly inclined side, and a baffle is slidably connected inside the clearance opening.

[0016] Preferably, the support base has a rectangular groove located below the scraper.

[0017] Preferably, the support plate has two inclined clearance grooves, each with a mounting block slidably connected inside. A second vacuum suction cup is fixedly installed inside each mounting block, with the suction end of the second vacuum suction cup flush with the top surface of the support plate. Two connecting rings are provided on one side of the support plate, each with a limiting pin slidably inserted inside. One end of each limiting pin passes through the support plate and extends into the corresponding inclined clearance groove before being fixedly connected to the corresponding mounting block. A spring is fitted onto the limiting pin, and the spring is fixedly connected between the corresponding connecting ring and the other end of the limiting pin. Connecting strips are provided at the bottom of the two connecting rings, and each connecting ring is slidably connected to the connecting strip. A third circular pin is fixedly connected to the connecting strip. Two limiting grooves are fixedly connected to the support base, with the bottom ends of the third circular pins located inside the corresponding limiting grooves. Each limiting groove includes a contraction section, a guide section, and a stretching section, with the guide section located between the contraction section and the stretching section.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By spraying a water-soluble polyvinyl alcohol solution, a water-soluble polyvinyl alcohol coating is formed on the surface of the board. This ensures the reflectivity of the laser when the laser scanner scans the board, preventing the transparent material and black composite material of the board from causing laser penetration and absorption. This improves the reflected signal during the laser measurement process and ensures the accuracy of the laser measurement.

[0020] 2. When the sleeve frame detaches from the board surface and returns to its initial position, the sleeve frame passes through the bottom of the scraper, and the scraper removes the water-soluble polyvinyl alcohol coating sprayed on the sleeve frame, thereby reducing the impact of the water-soluble polyvinyl alcohol coating accumulation on the subsequent use of the sleeve frame and ensuring the continuous use effect of the sleeve frame.

[0021] 3. The spray dissolving structure sprays warm water onto the surface of the board, dissolving the water-soluble polyvinyl alcohol coating on the surface of the board and allowing it to flow into the recycling bin between the support rods for collection. This process treats and dissolves the water-soluble polyvinyl alcohol coating on the surface of the board, facilitating subsequent processing and recycling, thereby reducing the loss of the water-soluble polyvinyl alcohol coating and lowering material costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the diagram;

[0024] Figure 3 For the present invention Figure 1 Enlarged schematic diagram of the structure at point B in the diagram;

[0025] Figure 4 For the present invention Figure 1 Enlarged schematic diagram of the structure at point C;

[0026] Figure 5 For the present invention Figure 1 Enlarged schematic diagram of the structure at point D;

[0027] Figure 6 This is a schematic diagram of the second structure of the present invention;

[0028] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point E in the diagram;

[0029] Figure 8 This is a bottom view schematic diagram of the first slide block, support plate and sliding bar cooperation structure of the present invention;

[0030] Figure 9 This is a top view schematic diagram of the first sliding block, support plate, and sliding bar assembly structure of the invention.

[0031] In the diagram: 1. Support base; 2. Air flotation guide rail; 3. First slide; 4. Support plate; 5. First mounting bracket; 6. Second mounting bracket; 7. Liquid storage shell; 8. Spray pipe; 801. Straight nozzle; 9. First electric control valve; 10. Liquid inlet pipe; 11. Laser scanner; 12. Sleeve frame; 13. Scraper; 14. Fixing strip; 15. Strip frame; 16. Second slide; 17. U-shaped frame; 18. Movable plate; 19. First hydraulic cylinder; 20. Guide groove; 21. Sliding strip; 22. Limiting strip; 23. First circular pin; 24. Guide strip; 25. Strip groove; 26. Second hydraulic cylinder; 27. Recovery box; 28. Support rod; 29. ​​Fixing plate; 30. U-shaped plate; 31. U-shaped groove; 32. Horizontal 33. Slide rail; 34. Transverse slide block; 35. Longitudinal slide block; 36. Longitudinal slide rail; 37. Second circular pin; 38. Rotating shaft; 39. Rotating bar; 40. Sliding groove; 41. Swing cylinder; 42. Fixed frame; 43. First vacuum suction cup; 44. Shielding frame; 45. Spray frame; 46. Water storage shell; 47. Spray head; 48. Water inlet pipe; 49. Second electric control valve; 50. Clearance opening; 51. Baffle; 52. Rectangular groove; 53. Inclined clearance groove; 54. Mounting block; 55. Second vacuum suction cup; 56. Limiting pin; 57. Connecting ring; 58. Connecting bar; 59. Spring; 60. Third circular pin; 60. Limiting groove rail; 6001. Contraction section; 6002. Guide section; 6003. Extension section. Detailed Implementation

[0032] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0033] like Figures 1 to 9 The laser measuring instrument for the flatness of a sheet metal includes a support base 1. Two air-bearing guide rails 2 are fixedly connected to the top of the support base 1. A first slide block 3 is slidably connected to each air-bearing guide rail 2. A support plate 4 is fixedly connected to the top of each first slide block 3. A limit clamping mechanism is connected to each support plate 4.

[0034] A first mounting bracket 5 and a second mounting bracket 6 are fixedly connected to the support base 1. A liquid storage shell 7 is fixedly connected to the top surface inside the first mounting bracket 5. Multiple spray pipes 8 are fixedly connected to the bottom of the liquid storage shell 7. A straight nozzle 801 is fixedly connected to the bottom end of the spray pipes 8. A first electric control valve 9 is fixedly installed on each spray pipe 8. An inlet pipe 10 is fixedly connected to the top of the liquid storage shell 7. A laser scanner 11 is fixedly installed on the top surface inside the second mounting bracket 6.

[0035] A sleeve frame 12 is provided on the side of the first mounting frame 5 away from the second mounting frame 6. A movable sleeve mechanism is connected to the sleeve frame 12. The movable sleeve mechanism drives the sleeve frame 12 to move synchronously with the plate and sleeve it on the plate during the movement. A scraper 13 is provided above the sleeve frame 12. Multiple fixing strips 14 are fixedly connected between the scraper 13 and the first mounting frame 5. During operation, the prior art usually uses contact scanning between the laser and the plate surface to perform multi-point measurement when measuring the flatness of the plate. When the plate is a transparent material, the laser will penetrate and cause the surface reflection signal to be lost. When the plate is a black composite material, most of the laser will be absorbed during measurement, resulting in a weak reflection signal, which makes it impossible to detect a sufficient signal and affects the accuracy of laser measurement.This technical solution can solve the above problems. The specific working method is as follows: The plate to be measured for flatness is placed on top of two support plates 4, and the sides of the plate are limited by a limiting clamping mechanism. Then, two first sliding blocks 3 slide synchronously along the air-bearing guide rail 2, driving the corresponding support plates 4 to move, causing the plate to move into the first mounting frame 5. When the plate moves directly below the mounting frame 12, the mounting frame 12 is driven to move synchronously with the plate by a moving mounting mechanism, and during the movement, it moves downwards and mounts the plate onto the mounting frame 5. On the sheet material, the sheet material and the mounting frame 12 are simultaneously inserted into the first mounting bracket 5. A water-soluble polyvinyl alcohol solution is pumped along the inlet pipe 10 into the storage housing 7. As the sheet material moves beneath multiple spray pipes 8, the valve passage of the first electrically controlled valve 9 opens, spraying the water-soluble polyvinyl alcohol solution from the storage housing 7 along the spray pipes 8. The spray range is limited by the straight nozzle 801, allowing the water-soluble polyvinyl alcohol solution to be sprayed onto the surface of the sheet material, forming a water-soluble polyvinyl alcohol coating. The mounting frame 12 then secures the sheet material, preventing… The water-soluble polyvinyl alcohol solution is sprayed onto the outside of the sheet material, preventing contamination and damage to the equipment. After the sheet material has completely passed through the spray pipe 8, the valve passage of the first electrically controlled valve 9 is closed. The moving sleeve mechanism drives the sleeve frame 12 to move upwards and detach from the sheet material surface, returning to its initial position. The sheet material continues to move into the second mounting frame 6, and the surface flatness of the moving sheet material is measured by laser scanning 11. The spraying of the water-soluble polyvinyl alcohol solution forms a water-soluble polyvinyl alcohol coating on the sheet material surface, ensuring the reflectivity of the laser during laser scanning by the laser scanner 11. This prevents the transparent and black composite materials of the sheet material from causing laser penetration and absorption, thereby improving the reflection signal during laser measurement and ensuring the accuracy of the laser measurement. When the sleeve frame 12 detaches from the sheet material surface and returns to its initial position, it passes under the scraper 13, which scrapes off the water-soluble polyvinyl alcohol coating sprayed onto the sleeve frame 12. This reduces the impact of the water-soluble polyvinyl alcohol coating accumulation on the subsequent use of the sleeve frame 12, ensuring the continuous use of the sleeve frame 12.

[0036] As a further embodiment of the present invention, the movable sleeve mechanism includes two strip frames 15, which are respectively fixedly connected to both sides inside the first mounting frame 5. A second slide block 16 is slidably connected inside each strip frame 15, and a U-shaped frame 17 is fixedly connected to each of the second slide blocks 16. Movable plates 18 are fixedly connected to both sides of the sleeve frame 12, and the movable plates 18 are slidably connected inside the corresponding U-shaped frames 17. A first hydraulic cylinder 19 is fixedly installed on the top of each U-shaped frame 17, and the piston shaft of the first hydraulic cylinder 19 passes through the corresponding U-shaped frame 17 and is fixedly connected to the top of the corresponding movable plate 18. During operation, when the plate moves directly below the sleeve frame 12, the two second slide blocks 16... All move synchronously along the corresponding strip frame 15, so that the sleeve frame 12 moves synchronously with the plate above the plate. At the same time, the piston shaft of the first hydraulic cylinder 19 moves downward and drives the movable plate 18 to move downward along the sliding connection of the U-shaped frame 17, so that the sleeve frame 12 moves downward during the lateral movement, thereby sleeved on the surface of the plate and shielding the side of the plate to prevent water-soluble polyvinyl alcohol solution from being sprayed on the outside of the plate. When the plate has completely passed the first mounting frame 5, the piston shaft of the first hydraulic cylinder 19 returns to the initial position, so that the sleeve frame 12 is disengaged from the sleeve of the plate, and moves in the opposite direction along the strip frame 15 through the second slide 16, so that the sleeve frame 12 returns to the initial position.

[0037] As a further embodiment of the present invention, the limiting clamping mechanism includes two guide grooves 20, both of which are formed on the support plate 4. A sliding strip 21 is slidably connected inside each guide groove 20, and a limiting strip 22 is fixedly connected to each sliding strip 21. A first circular pin 23 (e.g., ...) is fixedly connected to the bottom of each sliding strip 21. Figure 8 As shown, a guide strip 24 is slidably connected to the bottom of the support plate 4. A strip groove 25 is provided on the guide strip 24. The first circular pins 23 are all located inside the strip groove 25. A second hydraulic cylinder 26 is fixedly installed at the bottom of the support plate 4. The piston shaft of the second hydraulic cylinder 26 is fixedly connected to the guide strip 24. During operation, the piston shaft of the second hydraulic cylinder 26 drives the guide strip 24 to move, and the strip groove 25 on the guide strip 24 limits and guides the first circular pins 23, causing the sliding strip 21 to move along the guide groove 20, and driving the corresponding limiting strip 22 to move towards the edge of the plate, so that the limiting strip 22 limits the movement of the plate.

[0038] As a further embodiment of the present invention, a recycling bin 27 is provided at one end of the support base 1. Multiple support rods 28 are fixedly connected inside the recycling bin 27. A spray dissolving structure is connected to the top of the recycling bin 27. A plate transfer mechanism is connected to the support base 1. During operation, the plate moves through the inside of the second mounting frame 6. After the surface of the moving plate is measured by laser using a laser scanner 11, the plate is transferred from the top of the support plate 4 to the inside of the recycling bin 27 by the plate transfer mechanism. The plate is supported by multiple support rods 28. Then, the surface of the plate is sprayed with warm water by the spray dissolving structure, thereby dissolving the water-soluble polyvinyl alcohol coating on the surface of the plate and flowing into the recycling bin 27 between the support rods 28 for collection. This process treats the water-soluble polyvinyl alcohol coating on the surface of the plate and dissolves and collects it, facilitating subsequent processing and recycling, thereby reducing the loss of the water-soluble polyvinyl alcohol coating and lowering material costs.

[0039] As a further embodiment of the present invention, the plate transfer mechanism includes two fixed plates 29, which are fixedly connected to both sides of the support base 1. A U-shaped plate 30 is fixedly connected to each adjacent side of the two fixed plates 29. A U-shaped groove 31 is provided on the U-shaped plate 30. A transverse slide rail 32 is provided above and below the U-shaped plate 30. Each transverse slide rail 32 is fixedly connected to a corresponding fixed plate 29. A transverse slide block 33 is slidably connected to each transverse slide rail 32, and a longitudinal slide block is fixedly connected to each transverse slide block 33. Seat 34, two adjacent longitudinal slide seats 34 are slidably connected to a longitudinal slide rail 35, a second circular pin 36 is fixedly connected to the longitudinal slide rail 35, one end of the second circular pin 36 is located inside the corresponding U-shaped groove 31, a rotating shaft 37 is rotatably connected to the fixed plate 29, a rotating bar 38 is fixedly connected to one end of the rotating shaft 37, a sliding groove 39 is opened on the rotating bar 38, the sliding groove 39 is slidably sleeved on the corresponding second circular pin 36, a swing cylinder 40 is fixedly installed on the fixed plate 29, the swing cylinder The piston shaft of cylinder 40 is fixedly connected to the corresponding rotating shaft 37. A fixed frame 41 is fixedly connected between the two longitudinal slide rails 35. Multiple first vacuum suction cups 42 are fixedly installed at the bottom of the fixed frame 41. During operation, the piston shaft of the swing cylinder 40 rotates, causing the rotating shaft 37 to rotate at the rotating connection of the fixed plate 29, and causing the rotating bar 38 to rotate. During the rotation of the rotating bar 38, the second circular pin 36 is guided and limited by the sliding groove 39, so that the second circular pin 36 moves inside the U-shaped groove 31, and causes the longitudinal slide rail 35 to move in cooperation. The longitudinal slide rail 35 moves along the sliding connection of the longitudinal slide block 34, and causes the transverse slide block 33 to slide in cooperation on the transverse slide rail 32, so that the fixed frame 41 drives the multiple first vacuum suction cups 42 to move in a vertical U-shaped trajectory, and transfers the plate from the top of the support plate 4 to the top of the recycling box 27. Then, the first vacuum suction cups 42 release the adsorption of the plate, so that the plate falls to the top of the support rod 28, thus completing the transfer of the plate.

[0040] As a further embodiment of the present invention, the spray dissolving structure includes a shielding frame 43, which is fixedly connected to the top of the recycling bin 27. A spray rack 44 is fixedly connected to the top of the shielding frame 43. A water storage shell 45 is fixedly connected to the top surface inside the spray rack 44. Multiple spray heads 46 are fixedly connected to the bottom of the water storage shell 45. A water inlet pipe 47 is fixedly connected to the top of the water storage shell 45. The top end of the water inlet pipe 47 passes through the spray rack 44 and extends to the top of the spray rack 44 before a second electrically controlled valve 48 is fixedly installed. During operation, a warm water pipe with water pressure is connected to the top end of the water inlet pipe 47. When the plate is transferred from the top of the support plate 4 to the top of the support rod 28, the valve passage of the second electrically controlled valve 48 is opened, allowing warm water to enter the interior of the water storage shell 45 and spray onto the surface of the plate through multiple spray heads 46, dissolving the water-soluble polyvinyl alcohol coating and collecting it inside the recycling bin 27. The shielding frame 43 prevents the spray water from flowing out.

[0041] As a further embodiment of the present invention, the tops of both the shielding frame 43 and the recycling bin 27 are tilted to one side, and the tops of the support rod 28 and the recycling bin 27 are flush. During operation, the tilted arrangement of the recycling bin 27 and the support rod 28 allows the plate to slide along the tilting direction of the support rod 28 and slide into the interior of the spray rack 44. The tilt of the plate and the spraying direction of the spray head 46 create an angle, reducing splashing during spraying and improving the dissolution and collection effect of the water-soluble polyvinyl alcohol coating.

[0042] As a further embodiment of the present invention, a clearance opening 49 is provided on the downward inclined side of the shielding frame 43, and a baffle 50 is slidably connected inside the clearance opening 49. During operation, after the water-soluble polyvinyl alcohol coating on the surface of the board is dissolved and collected, the baffle 50 is slid upward along the sliding connection of the clearance opening 49 to release the blocking and limiting effect of the baffle 50 on the board, so that the board slides out from the clearance opening 49 along the inclined direction of the support rod 28, thus completing the unloading and collection of the board.

[0043] As a further embodiment of the present invention, a rectangular groove 51 is provided on the support base 1 (e.g., Figure 1 and Figure 3 As shown, the rectangular groove 51 is located below the scraper 13. During operation, by setting the rectangular groove 51 below the scraper 13, the water-soluble polyvinyl alcohol coating scraped by the scraper 13 falls down along the rectangular groove 51 and is collected, preventing the water-soluble polyvinyl alcohol coating from spilling and accumulating on the top of the support base 1, and reducing the impact of the water-soluble polyvinyl alcohol coating on the operation of the equipment.

[0044] As a further embodiment of the present invention, the support plate 4 has two inclined clearance grooves 52, and each inclined clearance groove 52 is slidably connected to a mounting block 53. A second vacuum suction cup 54 is fixedly installed inside the mounting block 53. The suction end of the second vacuum suction cup 54 is flush with the top surface of the support plate 4. Two connecting rings 56 are provided on one side of the support plate 4. A limiting pin 55 is slidably inserted inside the connecting ring 56. One end of the limiting pin 55 passes through the support plate 4 and extends into the corresponding inclined clearance groove 52 before being fixedly connected to the corresponding mounting block 53. A spring 58 is fitted onto the support base 5, and the spring 58 is fixedly connected between the other end of the corresponding connecting ring 56 and the limiting pin 55. Connecting strips 57 are provided at the bottom of the two connecting rings 56, and the connecting rings 56 are slidably connected to the connecting strips 57. A third circular pin 59 is fixedly connected to the connecting strip 57. Two limiting rails 60 are fixedly connected to the support base 1. The bottom ends of the third circular pins 59 are located inside the corresponding limiting rails 60. The limiting rails 60 include a contraction section 6001, a guide section 6002, and a stretching section 6003. The guide section 6002 is located within the contraction section 6001. Between section 001 and stretching section 6003; during operation, after the plate is limited by the limiting strip 22, the bottom of the plate is adsorbed and fixed by the second vacuum suction cup 54. During the movement of the support plate 4, the third circular pin 59 enters the guide section 6002 from the shrinking section 6001, thereby driving the connecting strip 57 away from the corresponding support plate 4. When the third circular pin 59 enters from the guide section 6002 and passes through the stretching section 6003, the maximum distance between the connecting strip 57 and the support plate 4 is reached, and the sliding connection between the connecting strip 57 and the connecting ring 56 is established. The function is to make the connecting ring 56 move away from the support plate 4 synchronously and move along the sliding connection of the connecting strip 57. During the movement of the connecting ring 56, the corresponding spring 58 is squeezed, so that the corresponding limit pin 55 generates elastic force and drives the mounting block 53 to slide along the corresponding inclined relief groove 52. This allows the second vacuum suction cup 54 to elastically pull the adsorption position of the plate, so that the bottom of the plate is elastically stretched in all directions and kept flat. This prevents the warping deformation caused by the material of the ultra-thin or flexible plate from affecting the laser measurement and improves the accuracy of the laser measurement.

[0045] Working principle of this invention:

[0046] The plate to be measured for flatness is placed on top of two support plates 4, and the side of the plate is limited by the limiting clamping mechanism. Then, the two first slide blocks 3 slide synchronously along the air bearing guide rail 2, driving the corresponding support plates 4 to move, so that the plate moves into the first mounting frame 5. When the plate moves directly below the sleeve frame 12, the sleeve frame 12 is driven to move synchronously with the plate by the moving sleeve mechanism. During the movement, it moves downward and sleeves onto the plate, so that the plate and the sleeve frame 12 enter synchronously. Inside the first mounting bracket 5, a water-soluble polyvinyl alcohol solution is pumped along the inlet pipe 10 into the reservoir housing 7. As the plate moves beneath the multiple spray pipes 8, the valve passage of the first electrically controlled valve 9 opens, thereby spraying the water-soluble polyvinyl alcohol solution from the reservoir housing 7 along the spray pipes 8. The spray range is limited by the straight nozzle 801, allowing the water-soluble polyvinyl alcohol solution to be sprayed onto the surface of the plate and form a water-soluble polyvinyl alcohol coating. The mounting frame 12, which covers the plate, prevents the water-soluble polyvinyl alcohol solution from being sprayed onto the plate. The outer side of the plate is contaminated and damaged. After the plate has completely passed through the spray pipe 8, the valve passage of the first electric control valve 9 is closed, and the sleeve frame 12 is driven to move upward and detach from the plate surface through the action of the moving sleeve mechanism and return to the initial position. The plate continues to move into the second mounting frame 6, and the surface of the moving plate is measured by laser scanning 11. The water-soluble polyvinyl alcohol solution is sprayed to form a water-soluble polyvinyl alcohol coating on the plate surface, which ensures the reflectivity of the laser when the laser scanner 11 scans the plate, and prevents the transparent material and black composite material of the plate from causing laser penetration and absorption, thereby improving the reflection signal in the laser measurement process and ensuring the accuracy of the laser measurement. When the sleeve frame 12 detaches from the plate surface and returns to the initial position, the sleeve frame 12 passes through the bottom of the scraper 13, and the water-soluble polyvinyl alcohol coating sprayed on the sleeve frame 12 is scraped off by the scraper 13, thereby reducing the impact of the accumulation of water-soluble polyvinyl alcohol coating on the subsequent use of the sleeve frame 12 and ensuring the continuous use effect of the sleeve frame 12.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A laser flatness measuring instrument for a sheet material comprising a support base, characterised in that, The top of the supporting base is fixedly connected with two air floating guide rails, the first sliding seat is slidably connected on the air floating guide rail, the top of the first sliding seat is fixedly connected with a supporting plate, and the supporting plate is connected with a limiting and clamping mechanism; The first mounting frame and the second mounting frame are fixedly connected on the supporting base, the top surface in the first mounting frame is fixedly connected with a liquid storage shell, the bottom of the liquid storage shell is fixedly connected with a plurality of liquid spraying pipes, the bottom end of the liquid spraying pipe is fixedly connected with a one-shaped nozzle, the first electric control valve is fixedly installed on the liquid spraying pipe, the top of the liquid storage shell is fixedly connected with a liquid inlet pipe, and the top surface in the second mounting frame is fixedly installed with a laser scanner; The side, away from the second mounting frame, of the first mounting frame is provided with a sleeving frame, the sleeving frame is connected with a moving sleeving mechanism, the sleeving frame is driven by the moving sleeving mechanism to move synchronously with the plate and is sleeved on the plate during the moving process, the top of the sleeving frame is provided with a scraper, and the scraper and the first mounting frame are fixedly connected with a plurality of fixed bars; The limiting and clamping mechanism comprises two guide grooves, the guide grooves are formed on the supporting plate, the inside of the guide groove is slidably connected with a sliding bar, the sliding bar is fixedly connected with a limiting strip, the bottom of the sliding bar is fixedly connected with a first circular pin, the bottom of the supporting plate is slidably connected with a guide strip, the guide strip is provided with a strip-shaped groove, the first circular pin is located in the strip-shaped groove, the bottom of the supporting plate is fixedly installed with a second hydraulic cylinder, and the piston shaft of the second hydraulic cylinder is fixedly connected with the guide strip; Two inclined accommodation grooves are formed on the supporting plate, the inside of the inclined accommodation groove is slidably connected with an installation block, the inside of the installation block is fixedly installed with a second vacuum suction disc, the suction end of the second vacuum suction disc is flush with the top surface of the supporting plate, one side of the supporting plate is provided with two connecting rings, the inside of the connecting ring is slidably inserted with a limiting pin, one end of the limiting pin penetrates through the supporting plate and extends into the corresponding inclined accommodation groove, and then is fixedly connected with the corresponding installation block, a spring is sleeved on the limiting pin, and the spring is fixedly connected between the other end of the limiting pin and the corresponding connecting ring, the bottom of the two connecting rings is provided with a connecting strip, the connecting ring is slidably connected with the connecting strip, the connecting strip is fixedly connected with a third circular pin, the supporting base is fixedly connected with two limiting groove rails, and the bottom end of the third circular pin is located in the corresponding limiting groove rail, and the limiting groove rail comprises a contraction section, a guide section and a stretching section.

2. A flatness laser measuring instrument for a sheet material according to claim 1, characterized in that, The moving sleeving mechanism comprises two strip-shaped frames, the two strip-shaped frames are fixedly connected on both sides in the first mounting frame, the inside of the strip-shaped frame is slidably connected with a second sliding seat, the second sliding seat is fixedly connected with a U-shaped frame, the two sides of the sleeving frame are fixedly connected with a movable plate, the movable plate is slidably connected in the corresponding U-shaped frame, the top of the U-shaped frame is fixedly installed with a first hydraulic cylinder, and the piston shaft of the first hydraulic cylinder penetrates through the corresponding U-shaped frame and is fixedly connected with the top of the corresponding movable plate.

3. The apparatus of claim 1, wherein, One end of the supporting base is provided with a recycling box, the inside of the recycling box is fixedly connected with a plurality of supporting rods, the top of the recycling box is connected with a spraying and dissolving structure, and the supporting base is connected with a plate transferring mechanism.

4. A flatness measuring instrument for a sheet material according to claim 3, wherein The plate transferring mechanism comprises two fixed plates fixedly connected on the two sides of the supporting base, one side of each of the two fixed plates is fixedly connected with a U-shaped plate, a U-shaped groove is formed in the U-shaped plate, horizontal sliding rails are arranged above and below the U-shaped plate, the horizontal sliding rails are fixedly connected on the corresponding fixed plates, horizontal sliding seats are slidably connected on the horizontal sliding rails, longitudinal sliding seats are fixedly connected on the horizontal sliding seats, longitudinal sliding rails are slidably connected on the two adjacent longitudinal sliding seats, a second circular pin is fixedly connected on the longitudinal sliding rail, one end of the second circular pin is located inside the corresponding U-shaped groove, a rotating shaft is rotatably connected on the fixed plate, a rotating strip is fixedly connected on one end of the rotating shaft, a sliding groove is formed in the rotating strip, the sliding groove is slidably sleeved on the corresponding second circular pin, an oscillating cylinder is fixedly installed on the fixed plate, a piston shaft of the oscillating cylinder is fixedly connected on the corresponding rotating shaft, a fixed frame is fixedly connected between the two longitudinal sliding rails, and a plurality of first vacuum suction cups are fixedly installed on the bottom of the fixed frame.

5. The apparatus of claim 3, wherein, The spray dissolving structure comprises a shielding frame fixedly connected on the top of the recycling box, a spray frame fixedly connected on the top of the shielding frame, a water storage shell fixedly connected on the top surface in the spray frame, a plurality of spray heads fixedly communicated on the bottom of the water storage shell, a water inlet pipe fixedly communicated on the top of the water storage shell, and a second electric control valve fixedly installed on the top end of the water inlet pipe extending above the spray frame.

6. A flatness laser measuring instrument for a sheet material as claimed in claim 5, wherein, The top of the shielding frame and the top of the recycling box are inclined to one side, the supporting rod is flush with the top of the recycling box.

7. A flatness laser measuring instrument for a sheet material as claimed in claim 6, wherein The side of the shielding frame inclined downward is provided with a gap opening, and a baffle is slidably connected in the gap opening.

8. The apparatus of claim 1, wherein, A rectangular groove is formed in the supporting base and located below the scraper.

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