High-precision plate thickness measuring device

Abstract

This application discloses a high-precision plate thickness measuring device, belonging to the field of plate thickness measurement technology. It mainly includes a processing table; a measuring component mounted on the processing table, comprising a first support frame and a second support frame fixed to the top of the processing table. A first moving unit is mounted on the first support frame, and a second moving unit is mounted on the second support frame. The first and second moving units are connected by a connecting frame and slide synchronously. The second moving unit includes a symmetrically arranged first mounting unit and a second mounting unit, each equipped with a distance measuring sensor arranged opposite to each other; and a holding component located on one side of the second support frame, comprising a holding plate driven by a driving component, the holding plate having an arc-shaped surface. This high-precision plate thickness measuring device uses the arc-shaped surface of the holding plate matching the concave surface of the plate for line contact holding, avoiding plate deformation caused by uneven local force and reducing measurement errors.

Description

Technical Field

[0001] This application relates to the field of plate thickness measurement technology, specifically a high-precision plate thickness measurement device. Background Technology

[0002] In the current booming wind power industry, wind turbine blades, as core components, directly influence power generation efficiency and stability. Wind turbine blades are mostly constructed using curved plates, and the thickness precision of these plates has a significant impact on the overall performance of the blade. From a structural mechanics perspective, curved plates with uniform and precisely controllable thickness enable the blades to maintain more stable mechanical properties when subjected to complex wind loads, effectively reducing the risk of fatigue damage and extending the blade's service life.

[0003] In industrial production, to ensure that the quality of sheet materials meets the standards, the thickness of the sheet materials needs to be accurately measured. There are various commonly used machine measurement methods. For example, laser thickness gauges emit laser beams to irradiate the surface of the sheet material and calculate the thickness by using the time difference or phase difference after the laser beam is reflected from the upper and lower surfaces of the sheet material. This non-contact measurement is suitable for high-precision scenarios such as thin metal sheets for electronic components and can avoid surface damage. However, when existing sheet metal thickness measuring equipment is applied to measuring curved sheet metal, most devices employ surface contact or point contact clamping structures. Surface contact is prone to uneven force distribution due to the mismatch between the curvature of the sheet metal surface and the shape of the clamping surface. For example, when measuring workpieces with large curvatures, the center of the clamping surface may form a gap with the sheet metal surface, leading to excessive edge compression, causing sheet metal deformation and deviation of the laser beam reflection path, resulting in distorted measurement data. Point contact, on the other hand, has a small contact area, making it difficult to provide sufficient friction to limit sheet metal movement. In actual measurements, slight displacement of the curved sheet metal due to external forces may cause misalignment of the reflected signals from the upper and lower surfaces of the laser thickness gauge, leading to thickness calculation errors. Neither of these clamping methods can achieve stable clamping of curved sheet metal. Therefore, it is necessary to provide a high-precision sheet metal thickness measuring device to solve these problems.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0005] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a high-precision plate thickness measuring device, which solves the problem that when measuring curved plates with plate thickness measuring equipment, the plate is often fixed by a surface contact or point contact clamping structure, which is prone to uneven local force due to the mismatch between the curvature of the plate surface and the shape of the pressing surface.

[0006] The technical solution adopted by this application to solve its technical problem is: a high-precision plate thickness measuring device, including a processing table for placing the plate; a measuring component, the measuring component being disposed on the top of the processing table, the measuring component including a first support frame and a second support frame fixed to the top of the processing table, the first support frame being provided with a first moving unit, the second support frame being provided with a second moving unit, the first moving unit and the second moving unit being connected by a connecting frame and sliding synchronously, the second moving unit including a symmetrically arranged first mounting unit and a second mounting unit, the first mounting unit and the second mounting unit respectively being equipped with a distance measuring sensor arranged opposite to each other, for measuring the distance between the upper and lower surfaces of the curved plate; a pressing component, the pressing component being located on one side of the second support frame, for pressing and positioning the curved plate, the pressing component including a pressing plate driven by a driving component, the pressing plate having an arcuate surface matching the concave surface of the curved plate, the arcuate surface and the concave surface of the curved plate forming a line contact pressing structure.

[0007] Furthermore, the holding assembly also includes a mounting plate mounted on the side of the second support frame away from the ranging sensor. A linear motor is mounted on the mounting plate, and a fixing plate is mounted on the output end of the linear motor. The holding plate is mounted on the bottom surface of the fixing plate. The fixing plate and the holding plate have multiple sets of first through holes for the ranging sensor on the first mounting unit to pass through. The processing table has second through holes with the same number and position as the first through holes, and the second through holes allow the laser beam of the ranging sensor on the second mounting unit to pass through.

[0008] Furthermore, the first support frame is arched, the second support frame is U-shaped, and the first moving unit includes two sets of guide rails mounted on the first support frame. Three sets of first sliders are slidably mounted on the guide rails. The two sets of first sliders arranged vertically on the two sets of guide rails are connected by a mounting part. The mounting part has three sets, which are defined from left to right as the first mounting part, the second mounting part, and the third mounting part.

[0009] Furthermore, the second moving unit and the first moving unit have similar structures. The second moving unit also has six sets of mounting parts symmetrically distributed along the center line of the second support frame. The three sets of horizontally arranged mounting parts near the upper end of the six sets of mounting parts are defined from left to right as the fourth mounting part, the fifth mounting part and the sixth mounting part, respectively. The three sets of horizontally arranged mounting parts near the lower end of the six sets of mounting parts are defined from left to right as the seventh mounting part, the eighth mounting part and the ninth mounting part, respectively. The fourth, fifth, and sixth mounting parts are combined to define a first mounting unit, and the seventh, eighth, and ninth mounting parts are combined to define a second mounting unit. The ranging sensor in the first mounting unit emits a laser downwards, and the ranging sensor in the second mounting unit emits a laser upwards. The upper and lower ranging sensors are arranged facing each other in the vertical direction.

[0010] Furthermore, a first connecting frame is connected between the first mounting part and the fourth mounting part, a second connecting frame is connected between the second mounting part and the fifth mounting part, and a third connecting frame is connected between the third mounting part and the sixth mounting part. A handle is installed on each of the three connecting frames. A first pull rod is connected between the fourth mounting part and the seventh mounting part, a second pull rod is connected between the fifth mounting part and the eighth mounting part, and a third pull rod is connected between the sixth mounting part and the ninth mounting part.

[0011] Furthermore, at least two sets of length measuring units are installed on the processing table. Each length measuring unit includes a bracket installed on the processing table, a spring between the bracket and the processing table, a fixed shaft installed on the bracket, a measuring wheel bearing at one end of the fixed shaft, and mounting brackets installed on three sets of connecting frames. A position sensor is installed at one end of the mounting bracket, and the position sensor works in conjunction with the measuring wheel.

[0012] Furthermore, bosses are fixedly installed near both ends of the processing table. Multiple sets of clamping assemblies are installed on the bosses. The multiple sets of clamping assemblies are symmetrically distributed along the center line of the processing table. The clamping assemblies include cylinders mounted on the legs. A right-angle plate is installed at the output end of the cylinder. Two sets of clamping wheels are mounted on the right-angle plate with bearings.

[0013] Furthermore, the bottom of the processing table has support legs, and the support legs are covered with a cover in a closed state. The side of the cover away from the feed guide plate has a through groove for the arc-shaped plate to pass through. The side of the cover is fitted with a feed guide plate by fasteners. The feed guide plate has a horn structure and has a feed port.

[0014] The beneficial effects of this application are as follows: The high-precision plate thickness measuring device provided by this application, through the synchronous sliding of the first and second moving units in the measuring assembly via the connecting frame, can adjust the measuring position and ensure that the upper and lower distance sensors always remain vertically aligned, avoiding laser optical path deviation due to positional offset; the symmetrically distributed first and second mounting units and the relatively arranged distance sensors can obtain the distance between the upper and lower surfaces of the plate. The pressing plate of the pressing assembly uses an arc-shaped surface that matches the concave surface of the plate for line contact pressing, which can avoid plate deformation caused by uneven local force, and provide sufficient friction to prevent plate shaking, ensuring the stability of the measurement process and realizing high-precision measurement of the thickness of arc-shaped plates.

[0015] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an overall schematic diagram of the high-precision plate thickness measuring device in this application; Figure 2 for Figure 1 Internal structure diagram; Figure 3 for Figure 2 A partial structural diagram; Figure 4 for Figure 3 A partial structural diagram; Figure 5 for Figure 4 A partial structural diagram; Figure 6 for Figure 6 A partial structural diagram; Figure 7 for Figure 6 Enlarged view of point A; The following are the labeling elements in the figure: 1. Processing table; 11. Controller; 12. Feed guide plate; 13. Support leg; 14. Cover; 15. Boss; 16. Opening and closing door; 2. Clamping assembly; 21. Cylinder; 22. Right angle plate; 23. Clamping wheel; 3. Measuring assembly; 31. First support frame; 32. Second support frame; 33. Guide rail; 34. First slider; 35. Second moving unit; 37. Distance sensor; 39. Third pull rod; 310. Third connecting frame; 311. Handle; 312. Length measuring unit; 313. Mounting frame; 314. In-situ sensor; 315. Bracket; 316. Fixed shaft; 317. Meter wheel; 318. First pull rod; 319. Second pull rod; 4. Pressing assembly; 41. Mounting plate; 42. Linear motor; 43. Fixed plate; 44. Pressing plate; 45. First through hole. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] 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 should fall within the scope of protection of the present application.

[0019] like Figures 1-7 As shown, this utility model embodiment provides a high-precision plate thickness measuring device, which mainly includes a processing table 1, a measuring component 3 and a pressing component 4; like Figures 4-6 As shown, the measuring component 3 includes a thickness measuring unit installed on the processing table 1. The thickness measuring unit includes a first support frame 31 fixedly installed on the processing table 1 near one end. The first support frame 31 is arched. A second support frame 32 is fixedly installed on the processing table 1 and on one side of the first support frame 31. The second support frame 32 has a U-shaped structure. The first support frame 31 is equipped with a first moving unit. The first moving unit includes two sets of horizontally parallel guide rails 33 fixedly installed on the first support frame 31. Three sets of first sliders 34 are slidably installed on each set of guide rails 33. A mounting part is connected between two vertically corresponding sets of first sliders 34, forming a total of three mounting parts, which are defined as the first mounting part, the second mounting part, and the third mounting part from left to right. Meanwhile, two sets of second moving units 35 are installed on the side of the second support frame 32 away from the first support frame 31. These second moving units 35 have a similar structure to the first moving units, and each second moving unit 35 also has six sets of mounting portions symmetrically distributed along the center line of the second support frame 32. Figure 5 Based on this, the three horizontally arranged mounting sections near the top of the six mounting sections are defined from left to right as the fourth mounting section, the fifth mounting section, and the sixth mounting section, respectively. The three horizontally arranged mounting sections near the bottom of the six mounting sections are defined from left to right as the seventh mounting section, the eighth mounting section, and the ninth mounting section, respectively. Here, the fourth mounting section, the fifth mounting section, and the sixth mounting section are combined to define the first mounting unit, and the seventh mounting section, the eighth mounting section, and the ninth mounting section are combined to define the second mounting unit. Furthermore, a first connecting frame (not shown in the figure) is connected between the first mounting part and the fourth mounting part, a second connecting frame (not shown in the figure) is connected between the second mounting part and the fifth mounting part, and a third connecting frame 310 is connected between the third mounting part and the sixth mounting part. At the same time, a handle 311 is fixedly installed on each of the three sets of connecting frames. The handle 311 is adapted to push the connecting frame to slide along the straight direction of the guide rail 33 of the moving unit, so as to adjust the distance between the three sets of connecting frames. Meanwhile, a first pull rod 318 is connected between the fourth and seventh mounting parts, a second pull rod 319 is connected between the fifth and eighth mounting parts, and a third pull rod 39 is connected between the sixth and ninth mounting parts. At the same time, a distance measuring sensor 37 is fixedly installed on both the first and second mounting units. The distance measuring sensor 37 can be a laser distance measuring sensor 37. The distance measuring sensor 37 on the first mounting unit emits laser downwards, and the distance measuring sensor 37 on the second mounting unit emits laser upwards. The upper and lower distance measuring sensors 37 are arranged facing each other in the vertical direction. Thus, the lasers emitted by the ranging sensors 37 on the first and second mounting units can be projected onto the upper and lower surfaces of the curved plate, respectively. By measuring the time it takes for the laser to travel from emission to reflection back to the sensor, and combining this with the speed of light, the vertical distance from the laser emission point to the upper and lower surfaces of the curved plate can be calculated. It should be noted that since there is a fixed distance L between the sensor emission points of the upper and lower mounting units (determined by the structure of the second support frame 32), the actual thickness of the plate needs to be calculated using the difference between the fixed distance and the two measured distances, i.e.: Thickness = L − (Dupper + Dlower), where Dupper is the measured distance to the upper surface, and Dlower is the measured distance to the lower surface.

[0020] Simultaneously, pulling the levers (such as the first lever 318 and the second lever 319) causes the connected mounting parts to slide linearly along the guide rail 33, ensuring that the sensors of the upper and lower mounting units always remain vertically aligned. This ensures that the vertical alignment of the sensors is not affected when the operator adjusts the spacing of the connecting brackets (changing the lateral measurement position) using the handle 311. This guarantees that when measuring the thickness of curved plates at different lateral positions (such as left, center, and right), the laser path is always perpendicular to the normal direction of the surface where the measured point is located, avoiding measurement errors caused by positional offset.

[0021] To achieve accurate measurement of the moving distance of curved sheet metal, and to provide a precise coordinate reference for subsequent thickness measurement, such as... Figure 4As shown, at least two sets of length measuring units 312 are installed on the processing table 1. Each length measuring unit 312 includes a bracket 315 mounted on the processing table 1, and a fixed shaft 316 is fixedly mounted on the bracket 315. A measuring wheel 317 is mounted on one end of the fixed shaft 316. Mounting brackets 313 are fixedly mounted on three sets of connecting brackets, and a position sensor 314 is fixedly mounted on one end of the mounting bracket 313. The position sensor 314 is existing technology and will not be described in detail here. The position sensor 314 works in conjunction with the measuring wheel 317. When the curved plate is inserted into the housing 14 from one end of the feed guide plate 12, the plate gradually approaches the measuring wheel 317 of the length measuring unit 312. As the plate is inserted, the measuring wheel 317 gradually contacts the upper surface of the curved plate and rotates with the plate due to friction. The position sensor 314 monitors the position of the plate in real time, and the measuring wheel 317... The number of rotations and wheel diameter are used to calculate the distance the plate moves, thereby accurately locating the position to be measured on the plate and providing a coordinate reference for thickness measurement; It should be noted that: a spring is provided between the bracket 315 and the processing table 1. The spring provides a gap between the bracket 315 and the processing table 1 for the curved plate to pass through. At the same time, the bracket 315 is adapted to be tightly attached to the surface of the curved plate under the action of the spring. The position sensor 314 of the length measuring unit 312 is close to the feed guide plate 12. At least two sets of length measuring units 312 are provided. When the curved plate slides down the meter wheel 317 of one set of length measuring units 312, the meter wheel 317 of the other set of length measuring units 312 can always be in contact with the upper surface of the curved plate, so as to maintain uninterrupted measurement of the length of the curved plate. As the curved sheet material extends into the housing 14 from one end of the feed guide plate 12, it gradually approaches the measuring wheels 317 of a set of length measuring units 312. As the sheet material continues to penetrate deeper, the measuring wheels 317 begin to contact the upper surface of the curved sheet material. Due to friction, the measuring wheels 317 roll on the surface of the curved sheet material as it moves. Knowing the circumference of the measuring wheels 317, the length of the curved sheet material that has moved can be accurately calculated by precisely recording the number of rotations. In this system, as the curved sheet slides over the measuring wheels 317 of one set of length measuring units 312, the measuring wheels 317 of the other set of length measuring units 312 maintain continuous contact with the upper surface of the curved sheet. This ensures that the length measurement is uninterrupted throughout the entire movement of the curved sheet along its length, allowing for consistently accurate acquisition of the sheet's length data. Combined with the signal from the in-situ sensor 314 sensing that the measuring wheels 317 have reached a specific position, and the distance data between the upper and lower surfaces of the sheet measured by the distance sensor 37, the precise thickness of the curved sheet at different locations can be accurately calculated, achieving comprehensive and precise measurement of the curved sheet's thickness. To maintain the accuracy of thickness measurement for curved plates, such as Figure 4 and Figures 6-7 As shown, a pressing assembly 4 is installed on the second support frame 32. The pressing assembly 4 includes a mounting plate 41 fixedly installed on the side of the second support frame 32 away from the ranging sensor 37, a linear motor 42 fixedly installed on the mounting plate 41, a fixing plate 43 fixedly installed at the output end of the linear motor 42, and a pressing plate 44 fixedly installed on the bottom surface of the fixing plate 43. The side of the pressing plate 44 near the processing table 1 is an arc-shaped surface, which is suitable for contacting the concave surface of the arc-shaped plate. Multiple sets of first through holes 45 are opened on the fixing plate 43 and the pressing plate 44 for the ranging sensor 37 on the first mounting unit to pass through. At the same time, the processing table 1 has the same number of second through holes (not shown in the figure) corresponding to the positions of the first through holes 45. The second through holes are suitable for the laser beam of the ranging sensor 37 on the second mounting unit to pass through. When the linear motor 42 starts operating, it moves the pressure plate 44 closer to or further away from the curved plate. When the pressure plate 44 approaches and presses against the curved plate, given the curved surface of the plate, the pressure plate 44 and the surface of the plate are in a line contact pressing state. Compared to other pressing methods, this line pressing mode makes the pressing of the curved plate more stable. The stable pressing state helps reduce errors caused by factors such as plate movement during measurement, thereby ensuring the accuracy of the thickness measurement of the curved plate.

[0022] The bottom of the processing table 1 has a support leg 13, which is used to support the processing table 1. The support leg 13 is covered with a cover 14 in a closed state, and an opening and closing door 16 is hinged on the cover 14. The opening and closing door 16 is adapted to rotate along the hinge with the cover 14 so that a part of the cover 14 is in an open state. A feed guide plate 12 is installed on the side of the cover 14 by fasteners. The feed guide plate 12 has a horn structure and a feed port (not shown in the figure). The curved plate can enter the interior of the cover 14 through the feed port. At the same time, a through groove (not shown in the figure) is opened on the side of the cover 14 away from the feed guide plate 12 for the curved plate to pass through. And a boss 15 is fixedly installed on the processing table 1 near both ends, and multiple sets of clamping components 2 are installed on the boss 15. The multiple sets of clamping components 2 are symmetrically distributed along the center line of the processing table 1. The clamping component 2 includes a cylinder 21 fixedly installed on the support leg 13, and a right angle plate 22 is fixedly installed at the output end of the cylinder 21. Two sets of clamping wheels 23 are mounted on the right angle plate 22 with bearings. Thus, the arc-shaped plate can enter the housing 14 from the feeding guide plate 12. Then, by starting the cylinder 21, the clamping wheel 23 is moved to move closer to or away from the sides of the arc-shaped plate, thereby realizing the clamping operation on both sides of the arc-shaped plate. Meanwhile, a PLC controller 11 is fixedly installed on the processing table 1. The PLC controller 11 is used to control the operation of the aforementioned drive equipment.

[0023] In summary: the curved plate enters the housing 14 through the trumpet-shaped feed guide plate 12. Subsequently, multiple sets of symmetrically distributed clamping components 2 are activated, and the cylinder 21 drives the clamping wheel 23 to move, clamping the two sides of the curved plate to ensure that the plate is fixed in position during the measurement process.

[0024] The first and second moving units 35 in the measuring assembly 3 can slide the connecting frame along the guide rail 33 via the handle 311 to adjust the spacing between the connecting frames. Distance sensors 37, positioned opposite each other on the first and second mounting units, emit lasers that contact the upper and lower surfaces of the curved plate, respectively. By measuring the time from laser emission to reflection and combining this with the speed of light, the distance from the laser emission point to the upper and lower surfaces of the curved plate is calculated; the difference between the two values ​​represents the thickness of the curved plate at a specified location. Pulling the lever causes the mounting part to slide along the guide rail 33, ensuring that the distance sensor 37 remains in the appropriate position when adjusting the spacing between the connecting frames, thus accurately measuring the thickness of the plate at different locations.

[0025] At least two sets of length measuring units 312 are used to accurately measure the thickness of the curved plate at a specific location. When the curved plate extends into the housing 14, the measuring wheel 317 contacts the upper surface of the plate and rolls due to friction. Knowing the circumference of the measuring wheel 317, the length of the plate's movement can be calculated by recording its number of rotations. Multiple sets of length measuring units 312 work collaboratively to ensure that the measuring wheel 317 is always in contact with the upper surface of the plate during its movement, guaranteeing the continuity of length measurement. An in-situ sensor detects the signal of the measuring wheel 317 reaching a specific position, and combined with data from the distance measuring sensor 37, accurately determines the thickness of the curved plate at different locations.

[0026] After the linear motor 42 of the clamping assembly 4 is started, it drives the clamping plate 44 to move closer to or further away from the curved plate. Because the clamping plate 44 is curved, when clamping the curved plate, it exhibits a line-contact clamping state, which is more stable than other clamping methods. This stable clamping state reduces errors caused by factors such as plate movement during measurement, ensuring the accuracy of the curved plate thickness measurement.

[0027] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high-precision plate thickness measuring device, characterized in that: include Processing table (1), used for placing boards; The measuring component (3) is located on the top of the processing table (1). The measuring component (3) includes a first support frame (31) and a second support frame (32) fixed to the top of the processing table (1). The first support frame (31) is provided with a first moving unit, and the second support frame (32) is provided with a second moving unit (35). The first moving unit and the second moving unit (35) are connected by a connecting frame and slide synchronously. The second moving unit (35) includes a first mounting unit and a second mounting unit arranged symmetrically. The first mounting unit and the second mounting unit are respectively equipped with a distance measuring sensor (37) arranged opposite to each other, which is used to measure the distance between the upper and lower surfaces of the arc-shaped plate. The pressing assembly (4) is located on one side of the second support frame (32) and is used for pressing and positioning the arc-shaped plate. The pressing assembly (4) includes a pressing plate (44) driven by a driving member. The pressing plate (44) has an arc-shaped surface that matches the concave surface of the arc-shaped plate. The arc-shaped surface and the concave surface of the arc-shaped plate form a line contact pressing structure.

2. The high-precision plate thickness measuring device according to claim 1, characterized in that: The holding assembly (4) further includes a mounting plate (41) mounted on the side of the second support frame (32) away from the ranging sensor (37). A linear motor (42) is mounted on the mounting plate (41). A fixing plate (43) is mounted on the output end of the linear motor (42). The holding plate (44) is mounted on the bottom surface of the fixing plate (43). Multiple sets of first through holes (45) are provided on the fixing plate (43) and the holding plate (44) for the ranging sensor (37) on the first mounting unit to pass through. The processing table (1) is provided with second through holes that are the same number and position as the first through holes (45). The second through holes are for the laser beam of the ranging sensor (37) on the second mounting unit to pass through.

3. The high-precision plate thickness measuring device according to claim 2, characterized in that: The first support frame (31) is arched, and the second support frame (32) is a U-shaped structure. The first moving unit includes two sets of guide rails (33) mounted on the first support frame (31). Three sets of first sliders (34) are slidably mounted on the guide rails (33). The two sets of first sliders (34) arranged vertically on the two sets of guide rails (33) are connected by a mounting part. The mounting part has three sets, which are defined from left to right as the first mounting part, the second mounting part and the third mounting part.

4. The high-precision plate thickness measuring device according to claim 3, characterized in that: The second moving unit (35) and the first moving unit have similar structures. The second moving unit (35) also has six sets of mounting parts symmetrically distributed along the center line of the second support frame (32). The three sets of horizontally arranged mounting parts near the upper end of the six sets of mounting parts are defined from left to right as the fourth mounting part, the fifth mounting part and the sixth mounting part. The three sets of horizontally arranged mounting parts near the lower end of the six sets of mounting parts are defined from left to right as the seventh mounting part, the eighth mounting part and the ninth mounting part. The fourth, fifth, and sixth mounting parts are combined to define the first mounting unit, and the seventh, eighth, and ninth mounting parts are combined to define the second mounting unit. The distance sensor (37) on the first mounting unit emits laser downwards, and the distance sensor (37) on the second mounting unit emits laser upwards. The upper and lower distance sensors (37) are set facing each other in the vertical direction.

5. The high-precision plate thickness measuring device according to claim 3, characterized in that: A first connecting frame is connected between the first mounting part and the fourth mounting part, a second connecting frame is connected between the second mounting part and the fifth mounting part, and a third connecting frame (310) is connected between the third mounting part and the sixth mounting part. A handle (311) is installed on each of the three connecting frames. A first pull rod (318) is connected between the fourth mounting part and the seventh mounting part, a second pull rod (319) is connected between the fifth mounting part and the eighth mounting part, and a third pull rod (39) is connected between the sixth mounting part and the ninth mounting part.

6. The high-precision plate thickness measuring device according to claim 3, characterized in that: At least two sets of length measuring units (312) are installed on the processing table (1). Each length measuring unit (312) includes a bracket (315) installed on the processing table (1). A spring is provided between the bracket (315) and the processing table (1). A fixed shaft (316) is installed on the bracket (315). A measuring wheel (317) is mounted on one end of the fixed shaft (316). A mounting bracket (313) is installed on each of the three sets of connecting brackets. A position sensor (314) is installed on one end of the mounting bracket (313). The position sensor (314) is used in conjunction with the measuring wheel (317).

7. The high-precision plate thickness measuring device according to claim 3, characterized in that: A boss (15) is fixedly installed near both ends of the processing table (1). Multiple clamping assemblies (2) are installed on the boss (15). The multiple clamping assemblies (2) are symmetrically distributed along the center line of the processing table (1). The clamping assembly (2) includes a cylinder (21) installed on the support leg (13). A right angle plate (22) is installed at the output end of the cylinder (21). Two sets of clamping wheels (23) are mounted on the right angle plate (22) with bearings.

8. The high-precision plate thickness measuring device according to claim 7, characterized in that: The processing table (1) has a support leg (13) at the bottom. The support leg (13) is covered with a cover (14) in a closed state. The side of the cover (14) away from the feed guide plate (12) has a through groove for the arc-shaped plate to pass through. The side of the cover (14) is fitted with a feed guide plate (12) by fasteners. The feed guide plate (12) has a horn structure and a feed port.

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