Flatness detection system and detection method of leveler

Abstract

The invention discloses a flatness detection system and method for a leveler, and the system comprises a conveying platform and a leveler body, the leveler body is installed on the conveying platform, the conveying platform is rotatably connected with rotating shafts at equal intervals, the rotating shafts at two sides are provided with side conveying rollers, and the rotating shaft in the middle is sleeved with a middle conveying roller. Limiting guide mechanisms are arranged on the two sides of the conveying platform and guarantee that the detected plate is located in the middle, and a leveling mechanism is arranged on the leveling machine body and used for leveling uneven positions of different positions of the surface of the detected plate. According to the flatness detection system and detection method of the leveler, the guide balls are elastic balls, the arrangement of the elastic balls can reduce the acting force between the guide balls and the detection plate, and the guide balls limit the two sides of the detection plate, so that the detection plate can be stably conveyed in the horizontal direction, and normal detection of equipment on the detection plate is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of leveling machine equipment, and in particular to a flatness detection system and a detection method for a leveling machine. Background Art

[0002] A leveler is a device used to correct the flatness of metal sheets. When the leveler is correcting the sheet, it is necessary to test the flatness of the sheet.

[0003] For example, a flatness detection system and method for a leveling machine with publication number CN115255032A, a plurality of conveying rollers are evenly installed on the conveying platform, and two servo trusses are fixedly installed on both sides above the feed port of the leveling machine.

[0004] The above-mentioned leveling machine flatness detection system realizes detection through a point-shooting laser rangefinder. The plate is transmitted through the conveying rollers on the leveling machine flatness detection system. There are no infinite positioning devices on both sides of the conveying rollers. The conveying rollers can easily cause the plate to shift during transportation, affecting the leveling machine flatness detection system's detection of the plate. Summary of the invention

[0005] The purpose of the present invention is to provide a flatness detection system and method for a leveling machine, so as to solve the problem raised by the above background technology that there are no unlimited devices on both sides of the conveying rollers of the leveling machine on the current market, and the conveying rollers are prone to cause the plate to shift during transportation, affecting the detection of the plate by the flatness detection system of the leveling machine.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flatness detection system of a leveling machine, comprising a conveying platform and a leveling body, the leveling body is installed on the conveying platform, the conveying platform is rotatably connected with rotating shafts at equal intervals, side conveying rollers are installed on the rotating shafts on both sides, and a middle conveying roller is sleeved on the middle rotating shaft, and limited guide mechanisms are arranged on both sides of the conveying platform, the limited guide mechanisms ensure that the detection plate is located in the middle position, and a leveling mechanism is arranged on the leveling body, and the leveling mechanism levels the unevenness at different positions on the surface of the detection plate.

[0007] Preferably, flat rods are slidably connected to both sides of the end of the conveying platform, oblique rods are installed on both sides of the middle of the flat rods, guide balls are engaged on the flat rods and the oblique rods, and the flat rods on both sides are located on both sides of the detection sheet.

[0008] Preferably, the flat rod and the oblique rod are provided with slots inside, and guide balls are engaged inside the slots, the ends of the guide balls protrude outside the flat rod, and a support spring is installed between the inner end of the guide balls and the flat rod.

[0009] Preferably, the guide ball is an elastic ball, and the elastic force of the support spring is greater than the acting force between the guide ball and the slot.

[0010] Preferably, a servo truss is installed on the conveying platform, a movable groove is opened on the servo truss, a slide plate is installed inside the movable groove, and a plurality of spot laser rangefinders are evenly fixedly installed in a matrix manner at the lower part of the slide plate.

[0011] Preferably, a bidirectional threaded rod is rotatably connected to the conveying platform, and flat rods are threadedly connected to both ends of the bidirectional threaded rod, and one end of the bidirectional threaded rod protrudes out of the outside of the conveying platform.

[0012] Preferably, a hydraulic cylinder is installed at the end of the leveling body, and a hanging plate is installed at the output end of the hydraulic cylinder. The hanging plate is slidably connected to the leveling body, and a pressure roller is arranged at the lower end of the hanging plate.

[0013] Preferably, the middle rotating shaft is rotatably connected to a rotating rod, and the other end of the rotating rod is rotatably connected to a mounting ring, the mounting ring is sleeved on the outside of the middle rotating shaft, an elastic airbag is installed on the side of the rotating shaft, and the elastic airbag is filled with inert gas.

[0014] A detection method for a flatness detection system of a leveling machine comprises the following steps:

[0015] S1. Place the sheet to be tested on the conveying platform;

[0016] S2. Automatically adjust the number, horizontal spacing and vertical distance of the installed spot rangefinders according to the width of the sheet;

[0017] S3. According to the length of the detected sheet, the parameter setting automatically eliminates the invalid detection distance at the head and tail of the sheet. Within the effective length of the detected sheet, according to the number of collection points, the best sampling interval distance is optimized, and the servo truss is started to perform data sampling for the entire stroke;

[0018] S4. After the sampling is completed, it is saved to the sampling buffer of the industrial computer software;

[0019] S5. Start the valid data scanning program, filter and process all the data in the buffer, and integrate the valid data set;

[0020] S6. Start the modeling program, perform point cloud data modeling on the sampled valid data set, and finally form a discrete point cloud data set in the Z direction;

[0021] S7. Start the program for finding the highest point and the lowest point of the dot cloud data, find the highest point and the lowest point, and then save them;

[0022] S8. Based on the discrete dot cloud data in the Z direction, combined with the collection interval distance in the Y direction of the carriage plate and the dot distribution of the laser rangefinder in the X direction, the spatial coordinate point cloud data is formed, and according to the variance formula, a three-dimensional spatial model is established, and the actual flatness value of the detected sheet is found by combining the highest and lowest points in the space;

[0023] S9. When the sheet material enters the leveling machine, the industrial computer controls the extension and retraction of the hydraulic cylinder according to the actual flatness value, and uses the pressure roller to level the uneven parts of the sheet material.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention is provided with a guide ball, a slot and a supporting spring. The guide ball is engaged with the slot. The friction between the detection plate and the flat rod can be reduced during the transmission of the detection plate by the side conveying roller and the middle conveying roller, so as to facilitate the transmission of the detection plate. The guide ball is an elastic ball. The setting of the elastic ball can reduce the acting force between the guide ball and the detection plate. By limiting the two sides of the detection plate with the guide ball, the detection plate can be stably transmitted in the horizontal direction, so as to facilitate the normal detection of the detection plate by the equipment.

[0026] 2. The present invention is provided with a mounting ring, a rotating rod and an elastic airbag. During the inspection of the inspection plate, the mounting ring and the middle conveying roller can be slightly raised and lowered by the arrangement of the rotating rod and the elastic airbag, thereby realizing leveling of uneven areas at different positions on the surface of the inspection plate. It has high flexibility and improves the efficiency of plate leveling. At the same time, the inspection system has a high degree of automation and few interference factors, thereby ensuring the accuracy of flatness detection, and the data after detection can be recorded in the file for later viewing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the cross-sectional structure of the flat rod of the present invention;

[0029] Figure 3 It is a side view structural schematic diagram of the leveling machine of the present invention;

[0030] Figure 4 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating shaft of the present invention;

[0032] Figure 6 For the present invention Figure 6 The enlarged structural diagram at A in the middle;

[0033] Figure 7 Flow chart of the detection method of the present invention.

[0034] In the figure: 1. conveying platform; 2. bidirectional threaded rod; 3. flat rod; 4. guide ball; 5. moving groove; 6. slide plate; 7. spot laser rangefinder; 8. hanging plate; 9. leveling body; 10. middle conveying roller; 11. side conveying roller; 12. supporting spring; 13. oblique rod; 14. slot; 15. hydraulic cylinder; 16. pressure roller; 17. rotating shaft; 18. mounting ring; 19. elastic airbag; 20. rotating rod; 21. servo truss. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-Figure 7 , the present invention provides a variety of technical solutions:

[0037] A flatness detection system for a leveling machine comprises a conveying platform 1 and a leveling body 9, wherein the leveling body 9 is mounted on the conveying platform 1, and a rotating shaft 17 is rotatably connected to the conveying platform 1 at equal intervals, and side conveying rollers 11 are mounted on the rotating shafts 17 on both sides, and a servo truss 21 is mounted on the conveying platform 1, and a moving groove 5 is opened on the servo truss 21, and a slide plate 6 is mounted inside the moving groove 5, and a plurality of spot laser rangefinders 7 are evenly fixedly mounted in a matrix manner on the lower part of the slide plate 6, a hydraulic cylinder 15 is mounted on the end of the leveling body 9, and a hanging plate 8 is mounted on the output end of the hydraulic cylinder 15, the hanging plate 8 is slidably connected to the leveling body 9, and a pressure roller 16 is arranged at the lower end of the hanging plate 8.

[0038] The servo truss 21 is an electric linear guide in the prior art, which drives the movement of the slide plate 6 through a servo motor (its accuracy indicators: resolution <= 0.5um, repeatability +-2um, linearity ±0.1% FS), and multiple side conveyor rollers 11 are evenly installed on the conveying platform 1. The multiple side conveyor rollers 11 form a sheet material detection area. The industrial computer transmits the real-time data signal of the sheet material in the sheet material detection area collected by the point laser rangefinder 7 through the Profinet communication module. After the real-time data signal is filtered and processed, a discrete dot matrix data cloud in the Z direction is formed according to the preset modeling algorithm package to obtain the actual flatness value of the sheet material, and the pressure roller 16 is controlled according to the actual flatness value. Lift and lower, so as to level the unevenness at different positions on the surface of the plate. When the hydraulic cylinder 15 is pressed down, the hydraulic cylinder 15 presses the hanging plate 8 and the pressure roller 16 downward, so that the pressure roller 16 can level the unevenness on the surface of the plate. The industrial computer automatically optimizes the best data collection interval and collection time according to the plate length, plate width and scanning speed through the algorithm model. As the scanning process proceeds, the real-time data of the current scan is displayed in real time and saved to the database synchronously. After the entire area is scanned, it is automatically saved as a record in the database. The data collected by the point laser rangefinder 7 is input into the data processing module of the industrial computer through the Profinet module in the form of Profinet Ethernet.

[0039] A leveling mechanism is provided on the leveling body 9, and the leveling mechanism levels the unevenness at different positions on the surface of the detection sheet. The middle rotating shaft 17 is rotatably connected to a rotating rod 20, and the other end of the rotating rod 20 is rotatably connected to a mounting ring 18. The mounting ring 18 is sleeved on the outside of the middle rotating shaft 17, and an elastic airbag 19 is installed on the side of the rotating shaft 17. The elastic airbag 19 is filled with inert gas.

[0040] The elastic airbag 19 and the rotating rod 20 are provided to make the mounting ring 18 move up and down a short distance, thereby making the middle conveying roller 10 vibrate up and down, which can reduce the force between the pressure roller 16 and the detection plate material and level the uneven parts of the detection plate material.

[0041] A middle conveying roller 10 is sleeved on the middle rotating shaft 17, and limited guide mechanisms are arranged on both sides of the conveying platform 1. The limited guide mechanisms ensure that the detection sheet is located in the middle position. Flat rods 3 are slidably connected to both sides of the end of the conveying platform 1, and inclined rods 13 are installed on both sides of the middle of the flat rod 3. Guide balls 4 are engaged on the flat rod 3 and the inclined rod 13. The flat rods 3 on both sides are located on both sides of the detection sheet. A card slot 14 is opened inside the flat rod 3 and the inclined rod 13, and a guide ball 4 is engaged inside the card slot 14. The end of the guide ball 4 protrudes out of the outside of the flat rod 3, and a support spring 12 is installed between the inner end of the guide ball 4 and the flat rod 3. The guide ball 4 is an elastic ball, and the elastic force of the support spring 12 is greater than the acting force between the guide ball 4 and the card slot 14.

[0042] The setting of the guide ball 4 can reduce the force between the detection plate and the flat rod 3 and the inclined rod 13. The setting of the guide ball 4 and the support spring 12 can reduce the force between the guide ball 4 and the side of the detection plate, thereby protecting the side of the detection plate.

[0043] A bidirectional threaded rod 2 is rotatably connected to the conveying platform 1 , and both ends of the bidirectional threaded rod 2 are threadedly connected to flat rods 3 , and one end of the bidirectional threaded rod 2 protrudes out of the outside of the conveying platform 1 .

[0044] The positions of the flat rod 3 and the oblique rod 13 can be adjusted according to the specifications of the inspection plate. The two-way threaded rod 2 is rotated by hand. The two-way threaded rod 2 rotates to move the flat rod 3 and the oblique rod 13 on both sides in opposite directions until the guide balls 4 on the flat rod 3 and the oblique rod 13 move to fit the side of the inspection plate and then the two-way threaded rod 2 is no longer rotated.

[0045] Another technical solution is the detection method of the flatness detection system of the leveling machine:

[0046] A detection method for a flatness detection system of a leveling machine comprises the following steps:

[0047] S1. Place the sheet to be tested on the conveying platform 1;

[0048] S2. According to the width of the sheet to be measured, the number, horizontal spacing and vertical distance of the installed point-shooting laser rangefinder 7 are automatically adjusted. In order to improve the accuracy of the collected data, the horizontal interval of the point-shooting laser rangefinder 7 is not greater than 50mm, and the vertical measurement distance is set according to the size of the near beam and far beam of the point-shooting laser rangefinder 7. A reasonable interval is set (the point-shooting laser rangefinder 7 collects data using the principle of triangulation);

[0049] S3. According to the length of the detected sheet, the parameter setting automatically eliminates the invalid detection distance of the head and tail of the sheet. Within the effective length of the detected sheet, according to the demand for the number of collection points, the best sampling interval distance is optimized, and the servo truss 21 is started to perform full-stroke data sampling. The sampling principle formula is: PosdataYi=(Time((Length-LenIvalid) / GroupData) / Vsp); where Length corresponds to the length of the sheet, LenIvalid corresponds to the invalid length of the head and tail of the board, GroupData corresponds to the number of groups to be collected on the entire board surface, Vsp corresponds to the scanning speed of the servo truss 21 m / min, and Time corresponds to the timer function. The timer function means that the system automatically records a set of matrix data currently collected whenever the timer time is up;

[0050] S4. After the sampling is completed, it is saved to the sampling buffer of the industrial computer software;

[0051] S5. Start the valid data scanning program, filter and process all the data in the buffer, and integrate the valid data set. The valid data filtering formula is: PosdataYIvai=Fil(PosdataYi, Max, Min); PosdataYi corresponds to the matrix data set of the entire board surface obtained by the truss servo, Max corresponds to the maximum range of valid values, and Min corresponds to the minimum range of valid values;

[0052] S6. Start the modeling program, perform point cloud data modeling on the sampled valid data set, and finally form a discrete point cloud data set in the Z direction;

[0053] S7. Start the program for finding the highest point and the lowest point of the dot cloud data, find the highest point and the lowest point, and then save them;

[0054] S8. According to the discrete dot cloud data in the Z direction, combined with the collection interval distance in the Y direction of the carriage plate and the dot distribution of the laser rangefinder 7 in the X direction, the spatial coordinate point cloud data is formed, and according to the variance formula, a three-dimensional spatial model is established, combined with the highest and lowest points in the space, to find out the actual flatness value of the detected sheet;

[0055] S9. When the sheet material enters the leveling machine, the industrial computer controls the extension and retraction of the hydraulic cylinder 15 according to the actual flatness value, and uses the pressure roller 16 to level the uneven parts of the sheet material.

[0056] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flatness detection system for a leveling machine, comprising a conveying platform and a leveling machine body, wherein the leveling machine body is mounted on the conveying platform, and is characterized in that: The conveying platform is connected with rotating shafts at equal intervals, side conveying rollers are installed on the rotating shafts on both sides, and a middle conveying roller is sleeved on the middle rotating shaft. Limiting guide mechanisms are arranged on both sides of the conveying platform, and the limiting guide mechanisms ensure that the inspection sheet is located in the middle position. A leveling mechanism is arranged on the leveling body, and the leveling mechanism levels the unevenness at different positions on the surface of the inspection sheet.

2. The flatness detection system of a leveling machine according to claim 1, characterized in that: The ends of the conveying platform are slidably connected with flat rods, oblique rods are installed at both sides of the middle of the flat rod, guide balls are clamped on the flat rod and the oblique rod, and the flat rods on both sides are located at both sides of the detection plate.

3. The flatness detection system of a leveling machine according to claim 2, characterized in that: The flat rod and the oblique rod are provided with a clamping groove inside, and a guide ball is clamped inside the clamping groove. The end of the guide ball protrudes out of the outside of the flat rod, and a support spring is installed between the inner end of the guide ball and the flat rod.

4. The flatness detection system of a leveling machine according to claim 2, characterized in that: The guide ball is an elastic ball, and the elastic force of the support spring is greater than the acting force between the guide ball and the slot.

5. The flatness detection system of a leveling machine according to claim 1, characterized in that: A servo truss is installed on the conveying platform, a moving slot is opened on the servo truss, a slide plate is installed inside the moving slot, and a plurality of spot laser rangefinders are evenly fixedly installed in a matrix manner at the lower part of the slide plate.

6. The flatness detection system of a leveling machine according to claim 1, characterized in that: A bidirectional threaded rod is rotatably connected to the conveying platform, and both ends of the bidirectional threaded rod are threadedly connected to flat rods, and one end of the bidirectional threaded rod protrudes out of the outside of the conveying platform.

7. The flatness detection system of a leveling machine according to claim 1, characterized in that: A hydraulic cylinder is installed at the end of the leveling machine body, and a hanging plate is installed at the output end of the hydraulic cylinder. The hanging plate is slidably connected to the leveling machine body, and a pressure roller is arranged at the lower end of the hanging plate.

8. The flatness detection system of a leveling machine according to claim 1, characterized in that: The middle rotating shaft is rotatably connected with a rotating rod, and the other end of the rotating rod is rotatably connected with a mounting ring, the mounting ring is sleeved on the outside of the middle rotating shaft, and an elastic airbag is installed on the side of the rotating shaft, and the elastic airbag is filled with inert gas.

9. A detection method for a flatness detection system of a leveling machine, characterized in that: The following steps are involved: S1. Place the sheet to be tested on the conveying platform; S2. Automatically adjust the number, horizontal spacing and vertical distance of the installed spot rangefinders according to the width of the sheet; S3. According to the length of the detected sheet, the parameter setting automatically eliminates the invalid detection distance at the head and tail of the sheet. Within the effective length of the detected sheet, according to the number of collection points, the best sampling interval distance is optimized, and the servo truss is started to perform data sampling for the entire stroke; S4. After the sampling is completed, it is saved to the sampling buffer of the industrial computer software; S5. Start the valid data scanning program, filter and process all the data in the buffer, and integrate the valid data set; S6. Start the modeling program, perform point cloud data modeling on the sampled valid data set, and finally form a discrete point cloud data set in the Z direction; S7. Start the program for finding the highest point and the lowest point of the dot cloud data, find the highest point and the lowest point, and then save them; S8. Based on the discrete dot cloud data in the Z direction, combined with the collection interval distance in the Y direction of the carriage plate and the dot distribution of the laser rangefinder in the X direction, the spatial coordinate point cloud data is formed, and according to the variance formula, a three-dimensional spatial model is established, and the actual flatness value of the detected sheet is found by combining the highest and lowest points in the space; S9. When the sheet metal enters the leveling machine, the industrial computer controls the extension and retraction of the hydraulic cylinder according to the actual flatness value, and uses the pressure roller to level the uneven parts of the sheet metal.

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