Laser measuring device for edge warping degree of acrylic plate

Abstract

The invention relates to the field of acrylic plate detection, in particular to an acrylic plate edge warping degree laser measuring device which comprises a first conveying line, a mounting frame is placed at one end of the first conveying line, a feeding and discharging measuring mechanism is arranged on one side of the mounting frame, the feeding and discharging measuring mechanism comprises an electric rotary table, and a measuring table is arranged on one side of the electric rotary table. The two sides of the measuring table are provided with limiting frames which are fixedly connected. Through the synergistic effect of the electric rotary table, the electric cylinder and the vacuum suction cup, automatic grabbing, exchanging and placing of undetected plates and detected plates are achieved, the detection efficiency of the acrylic plates is greatly improved, the scanning mode is intelligently adjusted according to the plates of different shapes (round or square), and the detection efficiency of the acrylic plates is greatly improved through rotary scanning of the round plates. Square plates are scanned in a segmented mode through combination of translation and rotation, so that the line laser profile measuring instrument can accurately collect complete edge data, and the problem that a traditional conveying line is prone to deviation in measurement is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of acrylic sheet inspection, specifically to a laser measuring device for the edge warping of acrylic sheets. Background Technology

[0002] Acrylic sheets are a type of polymer material made from methyl methacrylate. They have crystal-like transparency and are characterized by excellent weather resistance, high surface hardness, high temperature resistance, and good processing performance. According to the production process, they can be divided into cast sheets and extruded sheets. They are widely used in architectural lighting, advertising light boxes, bathroom fixtures, automotive lighting and other fields.

[0003] Compared to glass, acrylic is lightweight, impact-resistant, and environmentally friendly and recyclable. However, acrylic sheets are prone to warping and deformation during processing or storage due to temperature changes, humidity effects, or the release of internal stress. Warping can affect the accuracy of subsequent processes such as cutting, hot bending, or bonding, leading to dimensional deviations in the finished product or assembly difficulties. Therefore, it is necessary to measure the edge warping of acrylic sheets to ensure product quality.

[0004] In existing technologies, when a single conveyor line is used in conjunction with laser measurement, the sheet material is prone to displacement during the conveying process, which leads to insufficient measurement accuracy. If manual loading and laser detection are used, there is a problem of low loading and unloading efficiency. Therefore, it is urgent to develop an acrylic sheet edge warping detection device that can both ensure measurement accuracy and achieve automated operation. Summary of the Invention

[0005] The purpose of this invention is to provide a laser measurement device for the edge warping of acrylic sheets to solve the aforementioned technical defects.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a laser measuring device for the edge warpage of acrylic sheet, comprising a conveyor line, a mounting frame placed at one end of the conveyor line, a loading and unloading measuring mechanism on one side of the mounting frame, the loading and unloading measuring mechanism comprising an electric turntable, a measuring platform on one side of the electric turntable, fixedly connected limit frames on both sides of the measuring platform, a fixedly connected lead screw motor at one end of each limit frame, a gantry above the measuring platform, and a controller fixedly mounted above the gantry by bolts.

[0007] Preferably, an array of electric rollers are installed inside the mounting frame, and all the electric rollers are rotatably connected to the mounting frame. A second conveyor line is provided on one side of the mounting frame in the conveying direction, and a waste bin is provided on the other side of the mounting frame in the conveying direction. Both the second conveyor line and the waste bin are placed on the ground.

[0008] Preferably, the electric turntable is located on one side of the mounting frame and placed on the ground. A first mounting plate is fixedly connected to the rotating disk above the electric turntable. An electric cylinder is fixedly connected above the first mounting plate. A second mounting plate is fixedly connected to the end of the drive shaft of the electric cylinder. Symmetrically distributed limit rods are fixedly provided below the second mounting plate.

[0009] Preferably, a vacuum pump is fixedly installed on the top of the second mounting plate by bolts. The air inlet end of the vacuum pump is provided with a fixedly connected three-way connector. Both ends of the three-way connector are fitted with fixedly connected air pipes. Hollow plates are also fixedly connected below both ends of the second mounting plate. An array of suction cups is provided below the hollow plates. One end of the air pipe is inserted into the hollow plate and communicates with the inside of the suction cup.

[0010] Preferably, the drive shaft of the lead screw motor is provided with a ball screw fixedly connected to the end, the measuring platform is provided with a stepper motor fixedly connected below, the drive shaft of the stepper motor is provided with a spur gear fixedly connected to the end, the measuring platform is also provided with a rotatably connected clamping platform, and the outer side of the clamping platform is fitted with a fixedly connected external gear ring.

[0011] Preferably, the external gear ring meshes with a spur gear, and when the stepper motor starts, it drives the external gear ring to rotate through the spur gear, thereby driving the clamping table to rotate. A thrust bearing is placed below the clamping table, and the lower end of the thrust bearing is in contact with the measuring table.

[0012] Preferably, the clamping platform is further provided with two vertically distributed bidirectional lead screws, each with a symmetrically distributed lead screw nut on its outer side, and a clamping block fixedly connected above each lead screw nut. Each bidirectional lead screw is provided with a lead screw motor at one end, and the lead screw motor is fixed to the clamping platform by bolts.

[0013] Preferably, the drive shaft of the second lead screw motor is fixedly connected to the first bidirectional lead screw, and lead screw sliders are fixedly provided at both ends of the lower part of the gantry, and the lead screw sliders are engaged with the ball screw.

[0014] Preferably, one side of the gantry is also provided with a fixedly connected lead screw motor three, the drive shaft end of the lead screw motor three is provided with a fixedly connected bidirectional lead screw two, the outer side of the bidirectional lead screw two is provided with symmetrically distributed mounting plates three, and each mounting plate three is embedded with a lead screw nut, and the bidirectional lead screw two is threadedly connected to the lead screw nuts in the two mounting plates three;

[0015] A wired laser profile measuring instrument is bolted to the bottom of each of the mounting plates three. Two electrically connected wires are provided on the rear side of the controller, and the other end of the wires is electrically connected to the wired laser profile measuring instrument. A control panel is also installed on one side of the gantry.

[0016] Compared with existing technologies, the above technical solutions have the following beneficial effects:

[0017] This invention utilizes the synergistic action of an electric turntable, an electric cylinder, and a vacuum suction cup to automatically grasp, exchange, and place untested and tested acrylic sheets, significantly improving the testing efficiency of acrylic sheets. A second lead screw motor drives a bidirectional lead screw to rotate, which in turn drives a clamping block to adaptively hold the acrylic sheet, ensuring stable fixation during measurement. Simultaneously, the scanning method is intelligently adjusted for different sheet shapes (round or square)—round sheets are scanned by rotation, while square sheets are scanned by a combination of translation and rotation in segmented sections. This allows the line laser contour measuring instrument to accurately acquire complete edge data, effectively solving the problem of easy deviation in traditional conveyor line measurements.

[0018] After completing the edge warping detection of acrylic sheets, the system automatically sorts them according to the measurement results. Qualified products enter the next processing stage, while unqualified products are sent to the waste bin for correction, forming an integrated detection-sorting process. This achieves full automation from loading and unloading, positioning and clamping, scanning detection to classification output, significantly improving the intelligence level and quality control efficiency of acrylic sheet production. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0020] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram showing the positional structure of conveyor line one, conveyor line two, and the waste bin in this invention;

[0023] Figure 3 This is a schematic diagram of the overall structure of the loading and unloading measuring mechanism in this invention;

[0024] Figure 4 This is a schematic diagram of the connection structure between the electric turntable and the mounting plate 2 in this invention;

[0025] Figure 5 This is a schematic diagram of the connection structure between the measuring stage and the clamping stage in this invention;

[0026] Figure 6 This is a schematic diagram of the connection structure between the stepper motor and the clamping stage in this invention;

[0027] Figure 7 This is a schematic diagram of the connection structure between the gantry and the line laser profile measuring instrument in this invention.

[0028] Legend: 1. Conveyor Line 1; 11. Conveyor Line 2; 12. Mounting Frame; 13. Electric Roller; 14. Waste Bin; 2. Loading / Unloading Measuring Mechanism; 21. Electric Turntable; 22. Mounting Plate 1; 23. Electric Cylinder; 24. Limiting Rod; 25. Mounting Plate 2; 26. Vacuum Pump; 27. T-Connector; 28. Air Pipe; 29. ​​Hollow Plate; 30. Suction Cup; 31. Measuring Platform; 32. Limiting Frame; 33. 34. Ball screw motor; 35. Stepper motor; 36. Clamping table; 37. External gear ring; 38. Thrust bearing; 39. Ball screw motor 2; 40. Bidirectional ball screw 1; 41. Clamping block; 42. Gantry; 43. Ball screw slider; 44. Ball screw motor 3; 45. Bidirectional ball screw 2; 46. Mounting plate 3; 47. Line laser profile measuring instrument; 48. Controller; 49. Connecting cable; 5. Control panel. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0030] Example 1: Please refer to Figure 1 - Figure 2 As shown, a laser measuring device for edge warping of acrylic sheet of the present invention includes a conveyor line 1, a mounting frame 12 is placed at one end of the conveyor line 1, an array of electric rollers 13 are installed inside the mounting frame 12, the electric rollers 13 are rotatably connected to the mounting frame 12, a conveyor line 2 11 is provided on one side of the conveying direction of the mounting frame 12, and a waste bin 14 is provided on the other side of the conveying direction of the mounting frame 12, both the conveyor line 2 11 and the waste bin 14 are placed on the ground.

[0031] Example 2: Please refer to Figure 3 - Figure 7As shown, a laser measuring device for edge warping of acrylic sheet of the present invention includes a mounting frame 12. A loading and unloading measuring mechanism 2 is provided on one side of the mounting frame 12. The loading and unloading measuring mechanism 2 includes an electric turntable 21. The electric turntable 21 is located on one side of the mounting frame 12 and placed on the ground. A mounting plate 22 is fixedly connected to the rotating disk above the electric turntable 21.

[0032] An electric cylinder 23 is fixedly connected above the mounting plate 22. The drive shaft of the electric cylinder 23 is fixedly connected to the mounting plate 25. A symmetrically distributed limit rod 24 is fixedly provided below the mounting plate 25. When the electric turntable 21 is started, it drives the mounting plate 22 to rotate. The mounting plate 22 drives the electric cylinder 23 on it to rotate, thereby driving the mounting plate 25 to rotate.

[0033] A vacuum pump 26 is fixedly installed on the top of the mounting plate 25 by bolts. The air inlet of the vacuum pump 26 is provided with a fixedly connected three-way connector 27. Both ends of the three-way connector 27 are fitted with fixedly connected air pipes 28. Hollow plates 29 are also fixedly connected to both ends of the mounting plate 25. Below the hollow plates 29, there are arrayed suction cups 30. One end of the air pipe 28 is inserted into the hollow plate 29 and communicates with the inside of the suction cups 30. When the vacuum pump 26 is started, a negative pressure is formed in the suction cups 30, thereby adsorbing and gripping the acrylic plate.

[0034] A measuring platform 31 is provided on one side of the electric turntable 21. A limiting frame 32 is fixedly connected on both sides of the measuring platform 31. A lead screw motor 33 is fixedly connected to one end of each limiting frame 32. A ball screw 34 is fixedly connected to the end of the drive shaft of the lead screw motor 33. A stepper motor 35 is fixedly connected below the measuring platform 31. A spur gear is fixedly connected to the end of the drive shaft of the stepper motor 35.

[0035] The measuring platform 31 is also equipped with a rotatably connected clamping platform 36. An external gear ring 37 is fixedly connected to the outside of the clamping platform 36. The external gear ring 37 meshes with a spur gear. When the stepper motor 35 starts, it drives the external gear ring 37 to rotate through the spur gear, thereby driving the clamping platform 36 to rotate. A thrust bearing 38 is placed below the clamping platform 36. The lower end of the thrust bearing 38 is in contact with the measuring platform 31.

[0036] The clamping table 36 is equipped with two vertically distributed bidirectional lead screws 40. Each bidirectional lead screw 40 has a symmetrically distributed lead screw nut on its outer side. Each lead screw nut has a fixedly connected clamping block 41 above it. Each bidirectional lead screw 40 has a lead screw motor 39 at one end. The lead screw motor 39 is fixed to the clamping table 36 by bolts. The drive shaft of the lead screw motor 39 is fixedly connected to the bidirectional lead screw 40. The measuring table 31 is equipped with a gantry 42 above it. Each of the two ends of the gantry 42 is fixedly equipped with a lead screw slider 43. The lead screw slider 43 is engaged with a ball screw 34. A controller 48 is fixedly installed on the top of the gantry 42 by bolts. The controller 48 has two electrically connected connecting wires 49 on its rear side.

[0037] A screw motor 3 44 is fixedly connected to one side of the gantry 42. The drive shaft of the screw motor 3 44 is fixedly connected to a bidirectional screw 2 45. The outer side of the bidirectional screw 2 45 is provided with symmetrically distributed mounting plates 3 46. Screw nuts are embedded inside the mounting plates 3 46. The bidirectional screw 2 45 is threadedly connected to the screw nuts in the two mounting plates 3 46.

[0038] When the lead screw motor 3 44 starts, it drives the bidirectional lead screw 2 45 to rotate. The bidirectional lead screw 2 45 drives the two mounting plates 3 46 to move inward or outward synchronously through the two lead screw nuts. A wire laser profile measuring instrument 47 is bolted to the bottom of each mounting plate 3 46. The other end of the connecting line 49 is electrically connected to the wire laser profile measuring instrument 47. A control panel 5 is also installed on one side of the gantry 42. The control panel 5 is used to receive the edge warpage data of the acrylic sheet scanned by the wire laser profile measuring instrument 47 and compare it with the initially set warpage standard to determine whether the acrylic sheet is qualified.

[0039] The working process and principle of this invention are as follows:

[0040] The acrylic sheet to be tested is placed above the conveyor line 1, and then the conveyor line 1 is started. At this time, the acrylic sheet moves through the conveyor line 1 to the electric roller 13 in the mounting frame 12. The electric turntable 21 is started, and the electric turntable 21 drives the mounting plate 22 to rotate. The mounting plate 22 drives the electric cylinder 23 on it to rotate, thereby driving the mounting plate 25 to rotate. When the mounting plate 25 rotates, it drives the hollow plates 29 below its two ends to rotate until the two hollow plates 29 are respectively above the electric roller 13 and the clamping table 36. Then the electric turntable 21 stops running, and the electric cylinder 23 and the vacuum pump 26 are started. When the vacuum pump 26 is started, a negative pressure is formed in the suction cup 30 below the two hollow plates 29.

[0041] When the electric cylinder 23 is started, it drives the two hollow plates 29 and the suction cup 30 to descend, thereby adsorbing and grabbing the untested acrylic sheet on the electric roller 13 and the tested acrylic sheet on the clamping table 36. Then, the electric turntable 21 is started to switch the positions of the two hollow plates 29, and the electric cylinder 23 is started to drive the two hollow plates 29 to descend. The vacuum pump 26 is turned off, thereby releasing the acrylic sheet adsorbed at the suction cup 30 below the two hollow plates 29. If the tested acrylic sheet is qualified, the electric roller 13 is started to transport the acrylic sheet to the second conveyor line 11 for further processing. If the tested acrylic sheet is unqualified, the electric roller 13 is started to transport the acrylic sheet to the waste bin 14 for collection, so as to facilitate subsequent correction.

[0042] After the untested acrylic sheet is conveyed to the clamping table 36, two lead screw motors 39 are started to drive two bidirectional lead screws 40 to rotate synchronously, thereby driving the four clamping blocks 41 to move inward synchronously, thus clamping the acrylic sheet above the clamping table 36. After clamping, if the sheet is round, two lead screw motors 33 are started to drive the ball screw 34 to rotate, thereby moving the gantry 42 to the center position above the measuring table 31.

[0043] Then, the lead screw motor 344 is started to drive the two mounting plates 346 to move inward or outward synchronously until the lasers of the two line laser profile measuring instruments 47 can cover the edge of the circular acrylic sheet. At this time, the controller 48 starts the two line laser profile measuring instruments 47 to work synchronously, and then the stepper motor 35 is started to drive the clamping table 36 to rotate, thereby driving the circular acrylic sheet fixed above it to rotate. The control panel 5 is used to receive the edge warp data of the acrylic sheet scanned by the line laser profile measuring instrument 47, and compare it with the warp standard set initially to determine whether the acrylic sheet is qualified.

[0044] If the sheet material is square, after the sheet material is fixed, start the lead screw motor 344 so that the lasers of the two line laser profile measuring instruments 47 can cover the two edges of the square acrylic sheet material. At this time, start the lead screw motor 133 to drive the gantry 42 to move horizontally above the measuring table 31, thereby scanning the edge warp of the two sides of the square acrylic sheet material. After the two sides are scanned, start the stepper motor 35 to drive the clamping table 36 to rotate 90 degrees. Start the lead screw motor 344 again to adjust the distance between the line laser profile measuring instruments 47. After adjustment, start the lead screw motor 133 again so that the two line laser profile measuring instruments 47 can scan the edge warp data of the other two sides of the square acrylic sheet material.

[0045] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A laser measuring device for the edge warpage of acrylic sheet, comprising a conveyor line (1), characterized in that, One end of the conveyor line (1) is provided with an installation frame (12), and a loading and unloading measuring mechanism (2) is provided on one side of the installation frame (12). The loading and unloading measuring mechanism (2) includes an electric turntable (21), and a measuring platform (31) is provided on one side of the electric turntable (21). The measuring platform (31) is provided with fixedly connected limit frames (32) on both sides. One end of each limit frame (32) is provided with a fixedly connected screw motor (33). A gantry (42) is also provided above the measuring platform (31). A controller (48) is fixedly installed above the gantry (42) by bolts.

2. The laser measurement device for edge warpage of acrylic sheet according to claim 1, characterized in that, The mounting frame (12) is equipped with an array of electric rollers (13), all of which are rotatably connected to the mounting frame (12). A second conveyor line (11) is provided on one side of the conveying direction of the mounting frame (12), and a waste bin (14) is provided on the other side of the conveying direction of the mounting frame (12). Both the second conveyor line (11) and the waste bin (14) are placed on the ground.

3. The laser measurement device for edge warpage of acrylic sheet according to claim 1, characterized in that, The electric turntable (21) is located on one side of the mounting frame (12) and placed on the ground. A mounting plate (22) is fixedly connected to the rotating disk above the electric turntable (21). An electric cylinder (23) is fixedly connected above the mounting plate (22). A mounting plate (25) is fixedly connected to the end of the drive shaft of the electric cylinder (23). A symmetrically distributed limiting rod (24) is fixedly provided below the mounting plate (25).

4. The laser measurement device for edge warpage of acrylic sheet according to claim 3, characterized in that, A vacuum pump (26) is fixedly installed on the top of the mounting plate 2 (25) by bolts. The air inlet end of the vacuum pump (26) is provided with a fixedly connected three-way connector (27). Both ends of the three-way connector (27) are fitted with fixedly connected air pipes (28). Hollow plates (29) are also fixedly connected below both ends of the mounting plate 2 (25). An array of suction cups (30) is provided below the hollow plate (29). One end of the air pipe (28) is inserted into the hollow plate (29) and communicates with the inside of the suction cup (30).

5. The laser measuring device for edge warpage of acrylic sheet according to claim 1, characterized in that, The drive shaft of the lead screw motor (33) is provided with a fixedly connected ball screw (34), and a fixedly connected stepper motor (35) is provided below the measuring platform (31). The drive shaft of the stepper motor (35) is provided with a fixedly connected spur gear. The measuring platform (31) is also provided with a rotatably connected clamping platform (36), and a fixedly connected external gear ring (37) is sleeved on the outside of the clamping platform (36).

6. The laser measurement device for edge warpage of acrylic sheet according to claim 5, characterized in that, The external gear ring (37) meshes with the spur gear. When the stepper motor (35) starts, it drives the external gear ring (37) to rotate through the spur gear, thereby driving the clamping table (36) to rotate. A thrust bearing (38) is placed below the clamping table (36), and the lower end of the thrust bearing (38) is in contact with the measuring table (31).

7. The laser measurement device for edge warpage of acrylic sheet according to claim 6, characterized in that, The clamping platform (36) is also provided with two vertically distributed bidirectional lead screws (40). The outer side of each bidirectional lead screw (40) is provided with symmetrically distributed lead screw nuts. Above each lead screw nut is a clamping block (41) fixedly connected. One end of each bidirectional lead screw (40) is provided with a lead screw motor (39). The lead screw motor (39) is fixed to the clamping platform (36) by bolts.

8. The laser measuring device for edge warpage of acrylic sheet according to claim 7, characterized in that, The drive shaft of the second lead screw motor (39) is fixedly connected to the first bidirectional lead screw (40). Both ends of the lower part of the gantry (42) are fixedly provided with lead screw sliders (43), and the lead screw sliders (43) are engaged with the ball screw (34).

9. The laser measuring device for edge warpage of acrylic sheet according to claim 1, characterized in that, The gantry (42) is also provided with a fixedly connected screw motor three (44) on one side. The drive shaft end of the screw motor three (44) is provided with a fixedly connected bidirectional screw two (45). The outer side of the bidirectional screw two (45) is provided with symmetrically distributed mounting plates three (46). The mounting plates three (46) are all embedded with screw nuts. The bidirectional screw two (45) is threadedly connected to the screw nuts in the two mounting plates three (46). A wired laser profile measuring instrument (47) is bolted to the bottom of each of the mounting plates (46). Two electrically connected wires (49) are provided on the rear side of the controller (48). The other end of the wires (49) is electrically connected to the wired laser profile measuring instrument (47). A control panel (5) is also installed on one side of the gantry (42).

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