Galvanized sheet thickness difference laser measurement device and method

Abstract

The invention discloses a galvanized sheet thickness difference laser measurement device and method, and relates to the technical field of galvanized sheet measurement. The galvanized sheet thickness difference laser measurement device comprises a fixed compression roller, a movable compression roller arranged below the fixed compression roller, a pressure assembly arranged on a galvanized sheet moving path, a fixed guide plate tangentially arranged on the bottom roller surface of the fixed compression roller, and a movable guide plate tangentially arranged on the upper roller surface of the movable compression roller, and two rows of flat pressing rollers are arranged in the cavity of the movable guide plate. Through driving of the pressure assembly, on one hand, the movable pressing roller is driven to move towards the fixed pressing roller to clamp, roll and straighten a galvanized plate, on the other hand, the movable guide plate is driven to move towards the fixed guide plate to horizontally guide the galvanized plate, and secondary roll straightening is conducted on the galvanized plate through reciprocating movement of the flat pressing roller in the movable guide plate. The galvanized sheet is kept in a horizontal straightening state for thickness difference measurement, and data deviation in the measurement process is reduced.

Description

Technical Field

[0001] This invention relates to the field of galvanized sheet measurement technology, specifically to a laser measurement device and method for galvanized sheet thickness difference. Background Technology

[0002] Galvanized steel sheet is a metal material produced from steel sheet as the base material through processes such as cleaning and degreasing, pickling and rust removal, annealing, and hot-dip galvanizing. It has the characteristics of corrosion resistance, wear resistance, and bright and beautiful appearance, and is widely used in the construction industry, automobile manufacturing, furniture and home appliances and other fields. In the production process of galvanized steel sheet, both the raw materials and the finished products usually need to undergo thickness testing to ensure the standardization of its production and processing.

[0003] For example, patent CN117906509A discloses a laser measuring device and method for measuring the thickness difference of steel plates. When measuring the thickness of steel plates, this device uses a movable positioning frame and a fixed positioning frame to clamp the steel plate, then uses a laser rangefinder to measure the thickness of the steel plate, and uses a test axis to measure the defects at the steel plate. The thickness difference of the steel plate is obtained by subtracting the height of the defect from the original thickness of the steel plate, thus making the test results more accurate.

[0004] However, during transportation and processing, the boards are prone to deformation and local dents due to external environmental factors, which changes the overall flatness of the boards. Direct testing in this case is prone to large fluctuations in test data due to the irregular changes in the boards, and often cannot obtain accurate measurement data. Especially when the boards have warped edges or concave surfaces, the dimensions of the two opposite surfaces change, and the laser measurement points often cannot be aligned with the same point on the top and bottom of the boards, resulting in deviations in the measurement results. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a laser measurement device and method for galvanized sheet thickness difference, solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a laser measurement device and method for the thickness difference of galvanized steel sheets.

[0007] On one hand, the present invention provides a laser measurement device for the thickness difference of galvanized sheet, comprising: a fixed pressure roller, at least one set thereof; a movable pressure roller, disposed below the fixed pressure roller and capable of rotating relative to the fixed pressure roller to roll-press, level, and advance the galvanized sheet; a pressure component, disposed on the moving path of the galvanized sheet, for driving the fixed pressure roller to move toward the movable pressure roller, adapting to the thickness of the galvanized sheet; a fixed guide plate, tangentially disposed on the bottom roller surface of the fixed pressure roller, providing guidance and limiting of the upper end face during the conveying of the galvanized sheet; and a movable guide plate, tangentially disposed on the upper roller surface of the movable pressure roller, capable of moving synchronously toward the fixed guide plate in response to the pressure component, providing guidance and limiting of the lower end face during the conveying of the galvanized sheet, so that the galvanized sheet is kept in a horizontal and straight state for thickness detection.

[0008] Furthermore, the movable guide plate has a cavity inside, in which two rows of flat pressure rollers are provided. The two rows of flat pressure rollers can move synchronously with the movable guide plate, press flat on the lower end face of the galvanized sheet, and can reciprocate in response to the rotation of the fixed pressure rollers to perform secondary leveling on the galvanized sheet during conveying.

[0009] Furthermore, it also includes: a reciprocating frame, located within the cavity of the movable guide plate, and consisting of two sets, each used to support two rows of flat pressure rollers; a fourth drive shaft, located on both sides of the moving path of the flat pressure rollers, and having two rows of reciprocating shafts along its axial direction, wherein two rows of reciprocating grooves are formed on the two rows of reciprocating shafts, and the reciprocating grooves form a closed loop; and reciprocating clips, located on both sides of the reciprocating frame, and capable of sliding along the reciprocating grooves, converting rotational force into linear force to generate a driving force for reciprocating movement of the flat pressure rollers.

[0010] Furthermore, it also includes: a third drive shaft, rotatably mounted on both sides of the movable guide plate, used to drive the fourth drive shaft to rotate, and a long gear is provided in the axial direction of the third drive shaft; slots are provided on both sides of the fixed guide plate to provide movement of the long gear; a second drive shaft, located on one side of the slot, and a drive gear is provided in its axial direction, the drive gear being able to maintain sliding engagement with the long gear.

[0011] Furthermore, the fixed pressure rollers are provided in two sets, and a transmission belt is provided between the two sets of fixed pressure rollers. The transmission belt also has a first transmission shaft on its transmission track, which is used to drive the second transmission shaft to rotate.

[0012] Furthermore, the pressure assembly includes: a second bracket, which is disposed on the conveying path of the galvanized sheet; a first traction wheel set, which is disposed on both sides of the second bracket and has two sets, with a first pressure wheel also disposed on one side of the center line between the two sets of first traction wheel sets; and a first cable, which is located on the guide wheel of the first pressure wheel and the first traction wheel set and has its two ends connected to the movable pressure roller, so that when the first pressure wheel moves, it drives the movable pressure roller to move towards the fixed pressure roller.

[0013] Furthermore, the pressure assembly also includes: a second traction wheel set, which is located on both sides inside the second bracket and has two sets; a second pressure wheel is also provided on one side of the center line between the two sets of second traction wheel sets; a second cable, which is located on the guide wheels of the second traction wheel set and the second pressure wheel, and its two ends are connected to the movable guide plate, so that when the second pressure wheel moves, it drives the movable guide plate to move towards the fixed guide plate; and a support shaft, which is located on the central axis of the first pressure wheel and the second pressure wheel, and provides the driving force for the synchronous movement of the first pressure wheel and the second pressure wheel.

[0014] Furthermore, the fixed guide plate has a first arc-shaped groove on both sides that is flush with the bottom roller surface of the fixed pressure roller, and the movable guide plate has a second arc-shaped groove on both sides that is flush with the upper roller surface of the movable pressure roller, so that the gap between the fixed guide plate and the movable guide plate is consistent with the thickness of the galvanized sheet, providing the space required for the horizontal conveying of the galvanized sheet.

[0015] Furthermore, it also includes a first laser measurement module disposed on a fixed guide plate and a second laser measurement module disposed in the cavity of a movable guide plate. The first laser measurement module and the second laser measurement module are arranged opposite to each other through a fixed frame. The fixed frame is fixed to the fixed guide plate and forms a channel for conveying galvanized sheet inside the fixed frame, so that the straightened galvanized sheet is conveyed along the channel to perform thickness difference measurement.

[0016] On the other hand, the present invention also provides a laser measurement method for the thickness difference of galvanized steel sheets, comprising the following steps: Step 1: Place the galvanized sheet to be measured between one set of fixed pressure rollers and movable pressure rollers. Based on the driving of the pressure assembly, on the one hand, drive the movable pressure roller to move closer to the fixed pressure roller to clamp the galvanized sheet, and on the other hand, drive the movable guide plate to move closer to the fixed guide plate to provide limiting guidance for the subsequent horizontal conveying of the galvanized sheet. Step 2: Control the relative rotation of the fixed pressure roller and the movable pressure roller to generate the driving force to push the galvanized sheet forward and convey it. At the same time as conveying, the galvanized sheet is rolled and straightened. The straightened galvanized sheet is conveyed between the movable guide plate and the fixed guide plate. At this time, the two rows of flat pressure rollers respond to the drive of the fixed pressure roller and move back and forth in opposite directions. Using the fixed guide plate as a pressure platform, the galvanized sheet is rolled and straightened a second time. Step 3: After two straightening processes, the galvanized sheet is conveyed to the laser measurement structure for laser measurement. After the measurement is completed, it is conveyed out along another set of fixed and movable pressure rollers, realizing the dynamic straightening and measurement of the thickness difference of the galvanized sheet.

[0017] The present invention has the following beneficial effects: (1) The laser measurement device and method for the thickness difference of galvanized sheet, through the driving of the pressure component, on the one hand, drives the movable pressure roller to move towards the fixed pressure roller to clamp and roll straighten the galvanized sheet, and on the other hand, drives the movable guide plate to move towards the fixed guide plate to guide the galvanized sheet horizontally. The reciprocating movement of the flat pressure roller inside the movable guide plate is used to roll straighten the galvanized sheet a second time, so that the galvanized sheet is kept in a horizontal straight state for the thickness difference measurement, reducing the data deviation in the measurement process and improving the measurement accuracy.

[0018] (2) The laser measurement device and method for galvanized sheet thickness difference, through the action of pressure components on the movement of the movable pressure roller to the fixed pressure roller and the movement of the movable guide plate to the fixed guide plate, not only has flexible adaptive performance, which can adapt to the thickness difference measurement of galvanized sheets of different thicknesses, but also has dynamic conveying measurement performance, which can realize the thickness difference measurement of galvanized sheets in a dynamic conveying state, thereby improving the continuity, convenience and efficiency of galvanized sheet thickness measurement.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the driving mechanism of the present invention; Figure 3 This is an assembly diagram of the pressure component in this invention; Figure 4 This is a schematic diagram of the pressure component in this invention; Figure 5 This is a planar schematic diagram of the pressure component in this invention; Figure 6 This is a driving diagram of the fixed pressure roller and the movable pressure roller in this invention; Figure 7 This is the first assembly diagram of the fixed guide plate and the movable guide plate in this invention; Figure 8 This is a second assembly diagram of the fixed guide plate and the movable guide plate in this invention; Figure 9 This is the first assembly drawing of the laser measurement structure in this invention; Figure 10 This is the second assembly drawing of the laser measurement structure in this invention; Figure 11 This is the first assembly drawing of the flat roller in this invention; Figure 12 This is the second assembly drawing of the flat roller in this invention; Figure 13 This is an enlarged schematic diagram of the driving mechanism of the flat roller in this invention; Figure 14 This is a schematic diagram of the first drive mechanism for the flat roller in this invention; Figure 15 This is a schematic diagram of the second drive mechanism for the flat roller in this invention.

[0021] In the diagram, 1. Tooling table; 2. First support; 3. Fixed pressure roller; 4. Movable pressure roller; 5. Drive motor; 6. Fixed guide plate; 7. Laser measurement structure; 71. Fixed frame; 72. First laser measurement module; 73. Second laser measurement module; 8. Second support; 9. First pressure roller; 10. First cable; 11. First traction wheel assembly; 12. First drive shaft; 13. Second traction wheel assembly; 14. Second cable; 15. First pulley; 16. Drive belt; 17. Second pulley; 18. Tensioner pulley; 19. 20. Fixed gear; 21. Movable gear; 22. Movable guide plate; 23. Reciprocating frame; 24. Flat pressure roller; 25. Second pressure roller; 26. Support shaft; 27. Hydraulic rod; 28. Support guide rod; 29. ​​Second transmission shaft; 30. Transmission worm gear; 31. Transmission gear; 32. Long gear; 33. Guide rail; 34. Slide table; 35. Third transmission shaft; 36. Fourth transmission shaft; 37. Reciprocating shaft; 38. Reciprocating slide groove; 39. Reciprocating slip; 40. First bevel gear; 41. Second bevel gear. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0024] The following is based on Figures 1-15 This invention describes a laser measurement device and method for the thickness difference of galvanized steel sheets, provided by an embodiment of the present invention.

[0025] On the one hand, the present invention provides a laser measuring device for the thickness difference of galvanized steel sheets.

[0026] like Figures 1-3As shown, the laser measuring device for thickness difference of galvanized sheet includes a fixed pressure roller 3 and a movable pressure roller 4 located below the fixed pressure roller 3. The fixed pressure roller 3 is provided in two sets, forming a double-sided roller pressing and conveying state with the movable pressure roller 4. A first bracket 2 is provided between each set of fixed pressure roller 3 and movable pressure roller 4 to provide positioning support for the fixed pressure roller 3 and sliding support for the movable pressure roller 4. At the same time, a tooling table 1 is provided below the first bracket 2, so that the fixed pressure roller 3 and movable pressure roller 4 on both sides maintain a horizontal roller pressing and conveying state for the galvanized sheet.

[0027] In addition to the above, a pressure component is also provided on the moving path of the galvanized sheet. The pressure component can drive the movable pressure roller 4 to move towards the fixed pressure roller 3 to adapt to the clamping of galvanized sheets of different thicknesses. At the same time, it applies pressure to the galvanized sheet, so that the galvanized sheet is continuously conveyed after straightening under the pressure of the fixed pressure roller 3 and the movable pressure roller 4.

[0028] Meanwhile, a fixed guide plate 6 is provided at the bottom roller surface of the tangential fixed pressure roller 3 to provide guidance and limit on the upper end face during the conveying of the galvanized sheet, and a movable guide plate 21 is provided at the upper roller surface of the tangential movable pressure roller 4. The movable guide plate 21 can move synchronously towards the fixed guide plate 6 in response to the pressure assembly to provide guidance and limit on the lower end face during the conveying of the galvanized sheet. A first arc-shaped groove flush with the bottom roller surface of the fixed pressure roller 3 is formed on both sides of the fixed guide plate 6, and a second arc-shaped groove flush with the upper roller surface of the movable pressure roller 4 is formed on both sides of the movable guide plate 21, so that the gap between the fixed guide plate 6 and the movable guide plate 21 is consistent with the thickness of the galvanized sheet, providing the space required for the horizontal conveying of the galvanized sheet, and keeping the straightened galvanized sheet in a horizontal conveying state for thickness detection.

[0029] In addition, a cavity is formed inside the movable guide plate 21, in which two rows of flat pressure rollers 23 are provided. The two rows of flat pressure rollers 23 can move synchronously with the movable guide plate 21 and press flat on the lower end face of the galvanized sheet (the upper roller surfaces of the two rows of flat pressure rollers 23 tend to be flush with the upper end face of the movable guide plate 21, so that when the movable guide plate 21 moves closer to the galvanized sheet, the flat pressure rollers 23 are in contact with the lower end face of the galvanized sheet, applying horizontal guidance while also applying horizontal roller pressure), and can reciprocate in response to the rotation of the fixed pressure roller 3 to perform secondary leveling on the galvanized sheet being conveyed.

[0030] like Figure 1 , Figures 3-5 , Figures 7-8As shown, to accommodate the clamping and conveying of galvanized sheets of different thicknesses, the pressure assembly includes a second support 8 positioned along the conveying path of the galvanized sheet. Two sets of first traction wheel groups 11 are provided on both sides of the outer side of the second support 8. A first pressure wheel 9 is also provided on one side of the center line between the two sets of first traction wheel groups 11. First cables 10 are laid on the guide wheels of the first pressure wheel 9 and the first traction wheel group 11, so that the first cables 10 are pulled out from the bottom of the first pressure wheel 9 and the top of the first traction wheel group 11, respectively, so that the two... The ends are respectively connected to two sets of movable pressure rollers 4. At the same time, at least one set of hydraulic rods 26 is provided in the middle of the second bracket 8. The telescopic end of the hydraulic rod 26 is connected to the support shaft 25 located on the central axis of the first pressure roller 9. By contracting the hydraulic rod 26, the support shaft 25 is driven to move downward, which in turn drives the first pressure roller 9 to move downward, pulling the first cable 10 along the first traction wheel set 11 to move downward. The downward pulling force is then reacted on the movable pressure roller 4, driving the movable pressure roller 4 to move upward, so that the movable pressure roller 4 moves towards the fixed pressure roller 3 (e.g., Figure 1 , Figure 3 As shown, the galvanized sheet is adaptively clamped to prepare for the subsequent symmetrical rotation of the fixed pressure roller 3 and the movable pressure roller 4 to roll and straighten the galvanized sheet.

[0031] As a further technical solution of this embodiment, the pressure assembly also includes two sets of second traction wheel groups 13 located on both sides inside the second bracket 8. A second pressure wheel 24 is also provided on one side of the center line between the two sets of second traction wheel groups 13. Second cables 14 are laid on the guide wheels of the second traction wheel groups 13 and the second pressure wheels 24, so that the second cables 14 are pulled out from the bottom of the second pressure wheel 24 and the upper part of the second traction wheel group 13, respectively, with both ends connected to the movable guide plate 21. Simultaneously, the central axis of the second pressure wheel 24 is synchronously located on the support shaft 25. This causes the hydraulic rod 26 to move the support shaft 25 downwards, simultaneously moving the second pressure wheel 24 downwards, pulling the second cable 14 downwards along the second traction wheel group 13. The downward pulling force is then reacted on the movable guide plate 21, pulling the movable guide plate 21 towards the fixed guide plate 6 (e.g., ...). Figure 3 , Figures 7-8 As shown, the distance between the movable guide plate 21 and the fixed guide plate 6 is kept consistent with the thickness of the galvanized sheet, providing horizontal conveying and detection after the galvanized sheet is straightened. This allows the galvanized sheet to be dynamically conveyed horizontally for thickness measurement. While performing dynamic measurement, it can also ensure the stability of the measurement process and reduce data fluctuations. At the same time, it drives the two rows of flat pressure rollers 23 inside the movable guide plate 21 to move synchronously for straightening the galvanized sheet in subsequent conveying.

[0032] It should be noted that a support guide rod 27 is also provided at the edge of the movable guide plate 21 and the fixed guide plate 6. The support guide rod 27 is fixedly connected to the fixed guide plate 6 on the one hand, and slidably connected to the movable guide plate 21 on the other hand, providing support for the fixed guide plate 6 while guiding the movable guide plate 21.

[0033] like Figures 6-15 As shown, to achieve the straightening measurement of the galvanized sheet, a first pulley 15 is provided at one end of each of the two sets of fixed pressure rollers 3, and the two sets of first pulleys 15 are connected by a transmission belt 16. A fixed gear 19 is provided at the other end of each of the two sets of fixed pressure rollers 3, and it can always maintain meshing with the movable gear 20 provided on the movable pressure roller 4. At this time, a drive motor 5 is provided on the first bracket 2 to drive one set of fixed pressure rollers 3. Driven by the drive motor 5, one set of fixed pressure rollers 3 is driven to rotate, and then, under the transmission of the transmission belt 16, the other set of fixed pressure rollers 3 rotates synchronously. During the rotation of the fixed pressure rollers 3, the meshing transmission between the fixed gear 19 and the movable gear 20 drives the movable pressure roller 4 to rotate relative to it, so that the fixed pressure rollers 3 and the movable pressure roller 4 maintain a relative rotational state. While performing relative roll pressing straightening on the clamped galvanized sheet, the straightened galvanized sheet is also roll-pressed and conveyed (e.g., ...). Figure 6 As shown in the figure, preliminary straightening work is carried out on the galvanized sheet material to correct for warping, dents, and other defects caused by transportation and processing.

[0034] As a further embodiment, a reciprocating frame 22 is provided within the cavity of the movable guide plate 21, and two sets are provided to support the two rows of flat pressure rollers 23 respectively. Simultaneously, a combination of guide rails 33 and slide tables 34 is provided on both sides of the reciprocating frame 22 to provide the tracks required for the flat pressure rollers 23 to slide within the reciprocating frame 22 (e.g., ...). Figure 8 As shown), and in order to realize the reciprocating sliding of the two rows of flat pressure rollers 23, a fourth transmission shaft 36 is provided on both sides of the moving path of the flat pressure rollers 23, and two rows of reciprocating shafts 37 are provided along their axial direction. Among them, two rows of reciprocating grooves 38 are formed on the two rows of reciprocating shafts 37, and the reciprocating grooves 38 form a closed loop (as shown). Figures 14-15As shown), by providing reciprocating sliding buckles 39 on both sides of the reciprocating frame 22 and enabling the reciprocating sliding buckles 39 to slide along the reciprocating slide groove 38, when the fourth drive shaft 36 rotates and drives the reciprocating shaft 37 to rotate, it pushes the reciprocating sliding buckles 39 to slide along the track groove of the reciprocating slide groove 38, converting the rotational force into a linear force, generating a driving force to drive the reciprocating frame 22 to move, and then generating a driving force to drive the flat pressure roller 23 to move. Since the reciprocating slide groove 38 forms a closed loop, the sliding state of the reciprocating sliding buckle 39 along the reciprocating slide groove 38 has reciprocating sliding characteristics, so that the two rows of flat pressure rollers 23 can maintain reciprocating sliding in opposite directions. Then, by utilizing the reciprocating sliding of the flat pressure rollers 23, it can be used to press the galvanized sheet. While providing horizontal guidance, it can also apply reciprocating roller pressure to the conveying galvanized sheet, using the fixed guide plate 6 as a platform for further roller straightening, eliminating any incompletely eliminated pits and other defects on the galvanized sheet. (Since the two rows of flat rollers 23 maintain a state of moving towards each other, their roller pressure thrust can cancel each other out when they move close together or away from each other. Furthermore, after the straightening of the two sets of rollers, the deformation of the incompletely eliminated pits and other defects on the galvanized sheet is relatively small. At this time, the roller pressure friction acting on the galvanized sheet is relatively small, and the roller pressure thrust acting on the galvanized sheet by the rollers on both sides can overcome the roller pressure friction and maintain the continuous horizontal conveying of the galvanized sheet.)

[0035] Furthermore, a third drive shaft 35 is rotatably mounted on both sides of the movable guide plate 21. The third drive shaft 35 and the fourth drive shaft 36 are connected by a meshing combination of a first bevel gear 40 and a second bevel gear 41. A long gear 32 is provided axially on the third drive shaft 35, allowing the long gear 32 to pass through slots (such as those opened on both sides of the fixed guide plate 6)... Figure 7 As shown), a second drive shaft 28 is provided on one side of the slot, and a drive gear 31 is provided along its axial direction. The drive gear 31 can maintain sliding engagement with the long gear 32 (the setting of the long gear 32 allows the long gear 32 to always maintain engagement with the drive gear 31 when the movable guide plate 21 moves closer to the fixed guide plate 6). By using the rotation of the second drive shaft 28, the drive gear 31 is driven to rotate. The engagement of the drive gear 31 with the long gear 32 generates a driving force to drive the third drive shaft 35 to rotate. The driving force is transmitted to the fourth drive shaft 36 to control the reciprocating sliding of the flat pressure roller 23 in the reciprocating frame 22.

[0036] Furthermore, a first drive shaft 12 is provided on one side of the second drive shaft 28. The first drive shaft 12 and the second drive shaft 28 rotate as a whole through the meshing combination of the drive worm 29 and the drive worm wheel 30. A second pulley 17 is also provided at one end of the first drive shaft 12, so that the second pulley 17 can drive the first drive shaft 12 to rotate under the drive of the drive belt 16 (tension pulleys 18 are also provided on both sides of the second pulley 17 to tension the drive belt 16, so that the drive belt 16 and the second pulley 17 maintain a suitable wrap angle transmission). While the drive belt 16 drives the fixed pressure roller 3 and the movable pressure roller 4 to rotate relative to each other, it also drives the first drive shaft 12 to rotate synchronously, transmitting the driving force to the second drive shaft 28, and then sequentially to the fourth drive shaft 36, driving the flat pressure roller 23 to operate synchronously with the combination of the fixed pressure roller 3 and the movable pressure roller 4. While performing roll pressing and guiding conveying of the galvanized sheet, it also performs roll pressing and straightening work again, so as to keep it in a state of continuous straightening and horizontal conveying for thickness difference measurement.

[0037] like Figures 10-12 As shown, to measure the thickness difference of the straightened galvanized sheet, a laser measurement structure 7 consisting of a fixed frame 71, a first laser measurement module 72, and a second laser measurement module 73 is provided on the fixed guide plate 6. The fixed frame 71 is fixed to the fixed guide plate 6. The first laser measurement module 72 is located above the fixed frame 71, and the second laser measurement module 73 is located below the fixed frame 71 within the cavity of the movable guide plate 21. A channel for conveying the galvanized sheet is formed inside the fixed frame 71, allowing the straightened galvanized sheet to be conveyed along the channel. The distances from the top and bottom of the galvanized sheet to the sides of the two measurement modules are calculated using the laser emission from the first laser measurement module 72 and the second laser measurement module 73. The thickness of the galvanized sheet is obtained through calculation and compared with the standard thickness of the galvanized sheet to obtain the thickness difference.

[0038] During use (operation), the galvanized sheet to be measured is placed between the movable pressure roller 4 and the fixed pressure roller 3. At this time, based on the drive of the pressure assembly, the hydraulic rod 26 is controlled to retract, driving the support shaft 25 to move downward. The downward movement of the support shaft 25 drives the first pressure roller 9 downward, pulling the first cable 10 downward along the first traction wheel set 11. The downward pulling force reacts on the movable pressure roller 4, driving it upward, causing the movable pressure roller 4 to move towards the fixed pressure roller 3 to clamp the galvanized sheet. The adaptive clamping mechanism adjusts the thickness of the galvanized sheet while simultaneously driving the second pressure roller 24 to move downwards. This pulls the second cable 14 along the second traction wheel set 13, causing the downward pulling force to react on the movable guide plate 21, which then moves towards the fixed guide plate 6. This ensures that the distance between the movable guide plate 21 and the fixed guide plate 6 is consistent with the thickness of the galvanized sheet, providing a horizontal conveying inspection after the galvanized sheet is straightened. It also causes the flat pressure roller 23 to move synchronously, preparing for the straightening of the galvanized sheet during subsequent conveying. Then, driven by the drive motor 5, one set of fixed pressure rollers 3 is driven to rotate, and under the transmission of the transmission belt 16, the other set of fixed pressure rollers 3 rotates synchronously. At this time, the meshing transmission between the fixed gear 19 and the movable gear 20 drives the movable pressure roller 4 to rotate relative to each other, so that the fixed pressure rollers 3 and the movable pressure roller 4 maintain a relative rotational state, and perform relative roll pressing and straightening on the galvanized sheet in the clamp, and then roll press and convey the straightened galvanized sheet to the horizontal conveying between the movable guide plate 21 and the fixed guide plate 6. At the same time, the transmission belt 16 drives the first transmission shaft 12 to rotate, and transmits the driving force through the second transmission shaft 12. Shaft 28, third drive shaft 35, and fourth drive shaft 36 transmit power to two rows of reciprocating shafts 37. The rotational force is converted into a linear force by the sliding combination of the reciprocating grooves 38 and the reciprocating clips 39 on the two rows of reciprocating shafts 37. This drives the reciprocating sliding of the two rows of flat pressure rollers 23 to perform a second roll pressing and straightening of the galvanized sheet during transport. After straightening, the galvanized sheet is transported to the laser measurement structure 7 for laser measurement of thickness difference. After the measurement is completed, the sheet is transported out between another set of fixed pressure rollers 3 and movable pressure rollers 4 to perform straightening measurement under dynamic transport, thereby improving the accuracy of the measurement data and accelerating the measurement progress.

[0039] On the other hand, the present invention also provides a laser measurement method for the thickness difference of galvanized steel sheets, comprising the following steps: Step 1: Place the galvanized sheet to be measured between one set of fixed pressure rollers 3 and movable pressure rollers 4. Based on the driving of the pressure component, on the one hand, drive the movable pressure roller 4 to move closer to the fixed pressure roller 3 to clamp the galvanized sheet. On the other hand, drive the movable guide plate 21 to move closer to the fixed guide plate 6 to provide limiting guidance for the subsequent horizontal conveying of the galvanized sheet. Step 2: Control the fixed pressure roller 3 and the movable pressure roller 4 to rotate relative to each other, generating a driving force to push the galvanized sheet forward and convey it. At the same time as conveying, the galvanized sheet is rolled and straightened. The straightened galvanized sheet is conveyed between the movable guide plate 21 and the fixed guide plate 6. At this time, the two rows of flat pressure rollers 23 respond to the drive of the fixed pressure roller 3 and move back and forth in opposite directions. Using the fixed guide plate 6 as a pressure platform, the galvanized sheet is rolled and straightened a second time. Step 3: After two straightening operations, the galvanized sheet is conveyed to the laser measurement structure 7 for laser measurement. After the measurement is completed, it is conveyed out by rolling along another set of fixed pressure rollers 3 and movable pressure rollers 4, realizing the dynamic straightening and measurement of the thickness difference of the galvanized sheet.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for measuring the thickness of a galvanized sheet by laser, characterized in that, The utility model relates to a galvanized sheet thickness detection device, including: Fixed pressure roller (3) at least is equipped with a group; Movable pressure roller (4) is located below fixed pressure roller (3), and movable pressure roller (4) can rotate relative to fixed pressure roller (3), and the galvanized sheet is rolled and flattened and is pushed and is conveyed to each other; Pressure assembly is located on the moving path of galvanized sheet, is used for driving fixed pressure roller (3) to move towards movable pressure roller (4), and is adapted to the thickness of galvanized sheet; Fixed guide plate (6) is tangentially arranged at the bottom roller surface of fixed pressure roller (3), provides the guide limit of the upper end surface when the galvanized sheet is conveyed; Movable guide plate (21) is tangentially arranged on the upper roller surface of movable pressure roller (4), and movable guide plate (21) can move towards fixed guide plate (6) in response to the pressure assembly, provides the guide limit of the lower end surface when the galvanized sheet is conveyed, so that the galvanized sheet keeps the horizontal straightening state and carries out thickness detection.

2. The thickness difference laser measuring device for a galvanized sheet according to claim 1, characterized by The movable guide plate (21) is formed with a cavity, wherein two rows of flat rollers (23) are arranged in the cavity, the two rows of flat rollers (23) can move synchronously with the movable guide plate (21), are flattened on the lower end surface of the galvanized sheet, and can move reciprocatingly in response to the rotation of the fixed pressure roller (3), so as to flatten the galvanized sheet in the conveying process for the second time.

3. A device for measuring the thickness of a galvanized sheet according to claim 2, characterized in that Further comprising: Reciprocating frame (22) is arranged in the cavity of movable guide plate (21), and is arranged as two groups, and is respectively used for supporting two rows of flat rollers (23); The fourth transmission shaft (36) is arranged on both sides of the moving path of the flat roller (23), and two rows of reciprocating shafts (37) are arranged on the fourth transmission shaft (36) in the axial direction, wherein two rows of reciprocating sliding grooves (38) are arranged in opposite directions on the two rows of reciprocating shafts (37), and the reciprocating sliding grooves (38) form a closed loop; The reciprocating sliding buckle (39) is arranged on both sides of the reciprocating frame (22) and can slide along the reciprocating sliding groove (38), so as to convert the rotary force into linear force and generate driving force for driving the flat roller (23) to move reciprocatingly.

4. The thickness difference laser measuring device for a galvanized sheet according to claim 2, characterized by Further comprising: The third transmission shaft (35) is rotatably installed on both sides of the movable guide plate (21), and is used for driving the fourth transmission shaft (36) to rotate, and a long gear (32) is arranged on the third transmission shaft (35) in the axial direction, and the fixed guide plate (6) is provided with a slot for the movement of the long gear (32); The second transmission shaft (28) is arranged on one side of the slot, and a transmission gear (31) is arranged on the second transmission shaft (28) in the axial direction, and the transmission gear (31) can be slidingly engaged with the long gear (32).

5. The thickness difference laser measuring device for a galvanized sheet according to claim 2, characterized by The fixed pressure roller (3) is provided with two groups, and the two groups of fixed pressure rollers (3) are provided with a transmission belt (16), wherein The first transmission shaft (12) is arranged on the transmission track of the transmission belt (16), and the first transmission shaft (12) is used for driving the second transmission shaft (28) to rotate.

6. A device for measuring the thickness of a galvanized sheet according to any one of claims 1 to 5, characterized in that The pressure assembly comprises: The second support (8) is arranged on the conveying path of the galvanized sheet; The first traction wheel group (11) is arranged on both sides of the outside of the second support (8), and is provided with two groups, and a first pressure wheel (9) is further arranged on one side of the interval center line of the two groups of first traction wheel groups (11); The first cable (10) is located on the guide wheels of the first pressure wheel (9) and the first traction wheel group (11), and is connected to the movable pressure roller (4) at both ends, so that when the first pressure wheel (9) moves, the movable pressure roller (4) is driven to move towards the fixed pressure roller (3).

7. A device for measuring the thickness of a galvanized sheet according to claim 6, characterized in that The pressure assembly further comprises: The second traction wheel group (13) is arranged inside the second support (8) on both sides and is provided with two groups. The second pressure wheel (24) is further arranged on the middle line of the interval between the two groups of second traction wheel groups (13). The second cable (14) is located on the guide wheels of the second traction wheel group (13) and the second pressure wheel (24), and is connected to the movable guide plate (21) at both ends, so that when the second pressure wheel (24) moves, the movable guide plate (21) is driven to move towards the fixed guide plate (6). The support shaft (25) is arranged on the central shaft of the first pressure wheel (9) and the second pressure wheel (24), and provides driving force for the synchronous movement of the first pressure wheel (9) and the second pressure wheel (24).

8. The device for measuring the thickness of a galvanized sheet according to claim 6, wherein: The two sides of the fixed guide plate (6) form a first arc-shaped groove flush with the bottom roller surface of the fixed pressure roller (3), and the two sides of the movable guide plate (21) form a second arc-shaped groove flush with the upper roller surface of the movable pressure roller (4), so that the gap between the fixed guide plate (6) and the movable guide plate (21) is consistent with the thickness of the galvanized sheet, providing the space required for horizontal conveying of the galvanized sheet.

9. The thickness difference laser measuring device for a galvanized sheet according to claim 6, characterized by It also includes a first laser measurement module (72) arranged on the fixed guide plate (6) and a second laser measurement module (73) arranged in the cavity of the movable guide plate (21), wherein the first laser measurement module (72) and the second laser measurement module (73) are oppositely arranged through the fixed frame (71), the fixed frame (71) is fixedly connected to the fixed guide plate (6), and a channel for conveying the galvanized sheet is formed inside the fixed frame (71), so that the straightened galvanized sheet is conveyed along the channel for thickness difference measurement.

10. A method of measuring the thickness of a galvanized sheet by laser, characterized in that, The galvanized sheet thickness difference laser measurement device is suitable for any one of claims 1-9, comprising the following steps: Step one, place the galvanized sheet to be measured between one set of fixed pressure roller (3) and movable pressure roller (4), and based on the driving of the pressure assembly, on the one hand, drive the movable pressure roller (4) to move close to the fixed pressure roller (3) to clamp the galvanized sheet, on the other hand, drive the movable guide plate (21) to move close to the fixed guide plate (6) to provide limiting guide for subsequent horizontal conveying of the galvanized sheet; Step two, control the relative rotation of the fixed pressure roller (3) and the movable pressure roller (4) to generate driving force for driving the galvanized sheet to advance and convey, and at the same time, roll and straighten the galvanized sheet, and the straightened galvanized sheet is conveyed between the movable guide plate (21) and the fixed guide plate (6), at this time, the two rows of flat pressure rollers (23) respond to the driving of the fixed pressure roller (3) and reciprocate in the opposite direction to take the fixed guide plate (6) as the pressure platform to roll and straighten the galvanized sheet for the second time. Step three, the galvanized sheet after two straightening is conveyed to the laser measurement structure (7) to carry out the laser measurement, and after the measurement ends, it is conveyed out along another set of fixed press roller (3) and movable press roller (4) roller, realizes the dynamic straightening measurement work of the thickness difference of galvanized sheet.

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