A flatness detection device

Abstract

The utility model discloses a planeness detection equipment in the field of quality inspection equipment, including equipment frame, marble platform, linear slide and laser ranging module, the top fixedly connected with the top plate of equipment frame, the top center of top plate is fixedly connected with the marble platform through bolt, the side position symmetry of marble platform is provided with two stand bases, and the inside through bolt connection of stand base has two stand profiles, is provided with the first beam profile between two stands, and the side of first beam profile is provided with linear slide, and the side fixedly connected with the measuring module connecting piece of linear slide block, and the bottom through bolt connection of measuring module connecting piece has the second beam profile, and a plurality of laser ranging modules are arranged on the side of second beam profile located in the marble platform, and the utility model discloses through non - contact optical measuring technique and automatic intelligent algorithm, compensate platform inclination, work piece inclination etc. various error, realize high -precision, high -efficient, non -destructive planeness detection.

Description

Technical Field

[0001] This utility model relates to the field of quality inspection equipment, specifically a flatness testing device. Background Technology

[0002] Flatness inspection measures the deviation of the macroscopic unevenness of an object's surface from an ideal plane. In manufacturing processes, including machinery and electronics, flatness inspection is frequently required to determine product quality. As a critical component in machining, electronic equipment, and precision instruments, the flatness of housings and brackets directly impacts assembly accuracy and product performance.

[0003] The existing flatness testing equipment, with application number CN202322713855.6, includes a workpiece platform and a testing assembly. The testing assembly includes a top plate, a sleeve, a pressure sensor, a spring, a guide rod, and rollers. The top plate is slidably positioned above the workpiece platform, with its sliding direction parallel to the upper surface of the workpiece platform. The sleeve is positioned below the top plate. The pressure sensor and spring are both located inside the sleeve, with one side of the pressure sensor connected to the top plate and the other side connected to one end of the spring. The pressure sensor is connected to a controller. The end of the spring furthest from the pressure sensor is connected to the guide rod. One end of the guide rod connected to the spring is located inside the sleeve and slides within it; the other end is rotatably connected to the rollers. The central axis of the wheel is parallel to the upper surface of the workpiece platform. This invention can efficiently detect the flatness of the workpiece without easily damaging it. However, mechanical wear affects long-term accuracy, and long-term contact between the roller and the spring can lead to component wear. In particular, fatigue deformation of the spring directly affects the signal stability of the pressure sensor. Furthermore, the pressure sensor is sensitive to the surface roughness of the workpiece; even small scratches or protrusions can cause abnormal pressure fluctuations, requiring additional algorithms to filter noise. Otherwise, the accuracy of flatness calculation will be affected. A dedicated algorithm needs to be developed to convert the time-series data of the pressure sensor into a three-dimensional flatness model, which is computationally more complex than direct three-dimensional reconstruction using binocular vision or point cloud processing using laser scanning. Therefore, those skilled in the art have provided a flatness detection device to solve the problems mentioned in the background. Utility Model Content

[0004] The purpose of this invention is to provide a flatness testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flatness testing device includes a frame, a marble platform, a linear slide rail, and a laser ranging module. A top plate is fixedly connected to the top of the frame. The marble platform is bolted to the center of the top of the top plate. An angle positioning fixture is located at the upper left corner of the marble platform. Two column bases are symmetrically arranged on the side of the marble platform. The column bases are bolted to the top plate. Two column profiles are bolted inside the column bases. A first beam-shaped profile is slidably connected between the two columns. Profile connecting plates are symmetrically arranged on the side of the first beam-shaped profile via bolts. The side is connected by bolts to mounting connectors with slots. A linear slide rail is fixedly connected to two of the mounting connectors. A transfer box is provided at the bottom of one end of the linear slide rail. A drive motor is bolted to the bottom of the transfer box. The output shaft of the drive motor is connected to the drive structure of the linear slide rail through the transfer box. A linear slider is slidably connected to the side of the linear slide rail. A "T"-shaped measuring module connector is bolted to the side of the linear slider. A second beam profile is bolted to the bottom of the measuring module connector. Multiple laser ranging modules are provided on the side of the second beam profile where the marble platform is located.

[0007] As a further embodiment of this utility model: a guide post is vertically welded to the bottom center of one of the column profiles, and a T-shaped slider is slidably connected to the guide post; a ball screw transmission mechanism is fixedly connected inside the other column profile; top connectors are fixedly connected to both ends of the first beam profile by bolts; and the two top connectors are respectively connected to the T-shaped slider and the slider of the ball screw transmission mechanism by bolts.

[0008] As a further embodiment of this utility model: multiple sensor mounting plates are slidably connected to the side of the second beam profile. The position of the sensor mounting plates is fixed by locking bolts. A laser ranging module is connected to the bottom side of the sensor mounting plate by bolts. The laser scanning line of the laser ranging module is downward.

[0009] As a further improvement of this utility model: a protective plate is glued to one side of the laser ranging module, and a quick positioning stake is threadedly connected to the other side of the laser ranging module. The length of the quick positioning stake is the optimal distance between two adjacent laser ranging modules.

[0010] As a further embodiment of this utility model: an inverted "L"-shaped barcode scanner mounting plate is bolted to the top of the second beam profile on the side where the laser ranging module is located, and a drag chain connecting plate is bolted to the top of the other side of the second beam profile.

[0011] As a further improvement of this utility model: the corner positioning fixture is composed of two square metal frames, and the corner positioning fixture is connected to the marble platform by bolts.

[0012] As a further improvement of this utility model: except for the location of the corner positioning fixture, the other three corners of the marble platform are all connected by threaded studs, the top of the studs are provided with positioning pins, and the top of the marble platform is provided with a housing bracket, and the positioning pins quickly position the housing bracket.

[0013] As a further improvement of this utility model: a three-color light is provided on the side of the column profile near the corner positioning fixture, and a touch screen is provided on the side of the three-color light.

[0014] As a further improvement of this utility model: the bottom four corners of the equipment frame are welded with fuma wheel mounting plates, and the bottom of the fuma wheel mounting plates are connected to fuma wheels by bolts.

[0015] As a further embodiment of this utility model: the equipment frame is a box structure, the front of the equipment frame is connected to a double-opening front preparation door by hinges, and both sides of the equipment frame are connected to double-opening side preparation doors by hinges, and handles are provided on both the front preparation door and the side preparation door.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this utility model, a "T"-shaped measuring module connector is bolted to the side of the linear slider on the linear slide rail. The bottom of the measuring module connector is bolted to a second beam profile. Multiple sensor mounting plates are slidably connected to the side of the second beam profile. A laser ranging module is bolted to the bottom of the side of the sensor mounting plate. The laser scanning line of the laser ranging module points downward. During detection, the laser ranging module moves along a straight line on the top of the housing support with the linear slider. Multiple laser ranging modules simultaneously measure the distance on the surface of the housing support, ensuring that the detection range covers the housing support. This non-contact detection of the flatness of the housing support is non-destructive, with high detection efficiency and high detection accuracy.

[0018] 2. In this utility model, top connectors are fixedly connected to the two ends of the first beam profile by bolts. The top connectors are slidably connected to the side of the column profile. The two top connectors are respectively connected to the T-shaped slider and the slider of the ball screw transmission mechanism inside the column profile by bolts. Before testing, the height of the first beam profile is adjusted by the ball screw transmission mechanism to zero the laser ranging module, thereby improving the testing accuracy and making it convenient to use.

[0019] 3. In this utility model, a marble platform is fixedly connected to the top center of the top plate by bolts. An angle positioning fixture is set at the upper left corner of the marble platform. Except for the position of the angle positioning fixture, the other three corners of the marble platform are connected by threads with studs. The top of the studs is equipped with positioning pins. The angle positioning fixture is used to quickly clamp the shell support, and the positioning pins are used to accurately position the shell support. The work efficiency is high, the positioning is accurate, the detection accuracy is improved, and it is easy to use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a top view of the structure of this utility model;

[0022] Figure 3 This is a schematic cross-sectional view of the first beam-shaped profile in this utility model;

[0023] Figure 4 This is a schematic diagram of the marble platform in this utility model;

[0024] Figure 5 This is a schematic diagram of the laser ranging module in this utility model.

[0025] In the diagram: 1. Equipment frame; 2. Front preparation door; 3. Side preparation door; 4. Handle; 5. Fuma wheel mounting plate; 6. Fuma wheel; 7. Column base; 8. Column profile; 9. First beam profile; 10. Profile connecting plate; 11. Mounting connector; 12. Linear slide rail; 13. Adapter box; 14. Drive motor; 15. Linear slider; 16. Measuring module connector; 17. Second beam profile; 18. Marble platform; 9. Angle positioning fixture; 20. Housing bracket; 21. Touch screen; 22. Tri-color light; 23. Top plate; 24. Top connector; 25. Ball screw drive mechanism; 26. T-shaped slider; 27. Guide column; 28. Barcode scanner mounting plate; 29. ​​Sensor mounting plate; 30. Laser ranging module; 31. Cable chain connecting plate; 32. Stud; 33. Positioning pin; 34. Laser scanning line; 35. Protective plate; 36. Quick positioning stake. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5 In this embodiment of the utility model, a flatness testing device includes a device frame 1, a marble platform 18, a linear slide rail 12, and a laser ranging module 30. A top plate 23 is fixedly connected to the top of the device frame 1. The marble platform 18 is fixedly connected to the top center of the top of the top plate 23 by bolts. An angle positioning fixture 19 is provided at the upper left corner of the marble platform 18. Two column bases 7 are symmetrically arranged on the side of the marble platform 18. The column bases 7 are connected to the top plate 23 by bolts. Two column profiles 8 are bolted inside the column bases 7. A first beam-shaped profile 9 is slidably connected between the two columns. Profile connecting plates 10 are symmetrically arranged on the side of the first beam-shaped profile 9 by bolts. An installation connector 11 with a slot is bolted to the outside of the profile connecting plate 10. The two installation connectors 11 are internally fixed. A linear slide rail 12 is fixedly connected. A junction box 13 is provided at the bottom of one end of the linear slide rail 12. A drive motor 14 is bolted to the bottom of the junction box 13. The output shaft of the drive motor 14 is connected to the drive structure of the linear slide rail 12 through the junction box 13. A linear slider 15 is slidably connected to the side of the linear slide rail 12. A "T"-shaped measuring module connector 16 is bolted to the side of the linear slider 15. A second beam profile 17 is bolted to the bottom of the measuring module connector 16. Multiple laser ranging modules 30 are provided on the side of the second beam profile 17 located on the marble platform 18. The laser ranging module 30 converts the microscopic height difference of the workpiece surface into an electrical signal through optical sensing, ensuring micron-level detection accuracy. The detection process is non-contact, resulting in high detection efficiency and accuracy of non-destructive testing.

[0028] One of the column profiles 8 has a guide post 27 vertically welded to its bottom center, and a T-shaped slider is slidably connected to the guide post 27. The other column profile 8 has a ball screw drive mechanism 25 fixedly connected inside. The two ends of the first beam profile 9 are fixedly connected to top connectors 24 by bolts. The two top connectors 24 are respectively connected to the T-shaped slider 26 and the slider of the ball screw drive mechanism 25 by bolts. The height of the laser ranging module 30 can be adjusted by adjusting the height of the first beam profile 9 through the ball screw drive mechanism 25, which facilitates the zeroing setting of measurement data, improves detection accuracy, and is easy to use.

[0029] Among them, multiple sensor mounting plates 29 are slidably connected to the side of the second beam profile 17. The sensor mounting plates 29 are fixed in position by locking bolts. A laser ranging module 30 is connected to the bottom side of the sensor mounting plate 29 by bolts. The laser scanning line 34 of the laser ranging module 30 is downward. The interval between the laser ranging modules 30 can be adjusted according to different workpiece requirements, and the application range is wide.

[0030] Among them, a protective plate 35 is bonded to one side of the laser ranging module 30, and a quick positioning post 36 is connected to the other side of the laser ranging module 30 by a thread. The length of the quick positioning post 36 is the optimal distance between two adjacent laser ranging modules 30, which improves the speed of laser ranging module 30 spacing positioning and improves work efficiency.

[0031] Among them, the top of the second beam profile 17 on the side where the laser ranging module 30 is located is bolted to an inverted "L"-shaped barcode scanner mounting plate 28, which facilitates the traceability of the workpiece to be inspected. The top of the other side of the second beam profile 17 is bolted to a drag chain connecting plate 31, which facilitates the storage of cables.

[0032] The corner positioning fixture 19 consists of two square metal frames. The corner positioning fixture 19 is connected to the marble platform 18 by bolts. The structure is simple and reliable and easy to replace.

[0033] In this case, except for the corner positioning fixture 19, the other three corners of the marble platform 18 are connected by threaded studs 32. The top of the studs 32 is provided with positioning pins 33. The top of the marble platform 18 is provided with a housing bracket 20. The positioning pins 33 quickly position the housing bracket 20, improving the positioning accuracy and positioning speed of the housing bracket 20 and improving work efficiency.

[0034] Among them, a three-color light 22 is provided on the side of the column profile 8 near the corner positioning fixture 19 to visualize the working status. A touch screen 21 is provided on the side of the three-color light 22 to facilitate the operation of the testing equipment and the observation of testing data, making it convenient to use.

[0035] Among them, the bottom four corners of the equipment frame 1 are welded with fuma wheel mounting plates 5, and the bottom of the fuma wheel mounting plates 5 are connected with fuma wheels 6 by bolts. The fuma wheels 6 facilitate the adjustment of the level of the working plane, improve the detection accuracy, and facilitate the movement of the equipment frame 1, making it convenient to use.

[0036] The equipment frame 1 is a box structure. The front of the equipment frame 1 is connected to a double-opening front maintenance door 2 by hinges. Both sides of the equipment frame 1 are connected to double-opening side maintenance doors 3 by hinges. Both the front maintenance door 2 and the side maintenance door 3 are equipped with handles 4 to seal the equipment frame 1 and prevent dust and debris from entering the interior of the equipment frame 1 and affecting its accuracy. The front maintenance door 2 and the side maintenance door 3 facilitate maintenance personnel to inspect and repair internal components.

[0037] The working principle of this utility model is as follows: After the equipment is moved to the target position, the dial on the fuma wheel 6 is rotated to adjust the height of the four corners so that the plane of the top plate 23 is in a horizontal state. Before the test, the housing bracket 20 is installed on the top of the marble test plate. The corner positioning fixture 19 is used to quickly position the housing bracket 20. Then the housing bracket 20 is moved down and the positioning pin 33 and the stud 32 are used to accurately position the housing bracket 20. During the test, the ball screw transmission mechanism 25 first drives the first beam profile 9 to move up, so that the top connector 24 is slidably connected to the first beam profile 9, and the T-shaped slider 26 is slidably connected to the guide post 27, thereby changing the laser ranging. The height of module 30 is adjusted to zero the data of the laser ranging module 30, improving detection accuracy. Next, the rotation of drive motor 14 drives the linear slider 15 of linear slide rail 12 via adapter box 13, causing the second beam profile 17 to move fully from the top of the housing bracket 20. Sensor mounting plate 29 is slidably connected to the second beam profile 17 and locked with bolts. The number and quantity of laser ranging modules 30 can be changed according to the detection requirements of housing bracket 20, making it convenient to use. During the movement of the second beam profile 17, the barcode scanner mounted on barcode scanner mounting plate 28 identifies the markings on housing bracket 20, enabling product identification. The system is easy to use and allows for traceability. The tri-color light 22 on one of the column profiles 8 visualizes the working status and test results, facilitating monitoring of the testing progress. Furthermore, the computer connected to the touchscreen 21 receives the raw data transmitted from the sensors and runs a preset flatness algorithm program. This program performs filtering, fitting, and deviation calculations on the massive amount of test data. Based on the set "flatness pass threshold," it determines whether the flatness of the housing bracket 20 surface meets the standard and outputs the test results through the tri-color light 22 (green light = pass, red light = fail, etc.) and the touchscreen 21 interface, completing the entire testing process. The housing bracket 20 is easy to install and disassemble throughout the testing process. The equipment significantly improves efficiency through automated scanning and intelligent algorithms, meeting the needs of large-scale production. It is unaffected by human fatigue, offering higher accuracy and more stable results. It can also identify minute defects that are difficult to detect with the naked eye. Compared to mechanical contact inspection, it requires no physical contact, completely avoiding scratches or deformation of the workpiece. It can adapt to complex curved surfaces and soft materials, while reducing data deviations caused by probe wear and uneven pressure. It has a wider measurement range and better data repeatability. Overall, it achieves efficient, high-precision, and non-destructive flatness inspection, reducing manual labor intensity and ensuring product quality. It is especially suitable for modern manufacturing scenarios with high requirements for accuracy and workpiece integrity.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A flatness testing device, comprising a device frame (1), a marble platform (18), a linear slide rail (12), and a laser ranging module (30), characterized in that: The top of the equipment frame (1) is fixedly connected to a top plate (23). A marble platform (18) is fixedly connected to the top center of the top plate (23) by bolts. An angle positioning fixture (19) is provided at the upper left corner of the marble platform (18). Two column bases (7) are symmetrically arranged on the side of the marble platform (18). The column bases (7) are connected to the top plate (23) by bolts. Two column profiles (8) are bolted inside the column bases (7). A first beam profile (9) is slidably connected between the two columns. Profile connecting plates (10) are symmetrically arranged on the side of the first beam profile (9) by bolts. An installation connector (11) with a slot is bolted to the outside of the profile connecting plate (10). The two mounting plates are connected to the top center of the top center of the top plate (23) by bolts. A linear slide rail (12) is fixedly connected inside the mounting connector (11). A transfer box (13) is provided at the bottom of one end of the linear slide rail (12). A drive motor (14) is bolted to the bottom of the transfer box (13). The output shaft of the drive motor (14) is connected to the drive structure of the linear slide rail (12) through the transfer box (13). A linear slider (15) is slidably connected to the side of the linear slide rail (12). A "T"-shaped measuring module connector (16) is bolted to the side of the linear slider (15). A second beam profile (17) is bolted to the bottom of the measuring module connector (16). Multiple laser ranging modules (30) are provided on the side of the second beam profile (17) located on the marble platform (18).

2. The flatness testing device according to claim 1, characterized in that: One of the column profiles (8) has a guide post (27) vertically welded to its bottom center. A T-shaped slider is slidably connected to the guide post (27). A ball screw transmission mechanism (25) is fixedly connected inside the other column profile (8). Top connectors (24) are fixedly connected to both ends of the first beam profile (9) by bolts. The two top connectors (24) are respectively connected to the T-shaped slider (26) and the slider of the ball screw transmission mechanism (25) by bolts.

3. The flatness testing device according to claim 1, characterized in that: Multiple sensor mounting plates (29) are slidably connected to the side of the second beam profile (17). The sensor mounting plates (29) are fixed in position by locking bolts. A laser ranging module (30) is connected to the bottom side of the sensor mounting plate (29) by bolts. The laser scanning line (34) of the laser ranging module (30) is downward.

4. The flatness testing device according to claim 1, characterized in that: A protective plate (35) is attached to one side of the laser ranging module (30), and a quick positioning stake (36) is connected to the other side of the laser ranging module (30) by a thread. The length of the quick positioning stake (36) is the optimal distance between two adjacent laser ranging modules (30).

5. The flatness testing device according to claim 1, characterized in that: The top of the second beam profile (17) on the side where the laser ranging module (30) is located is bolted to an inverted "L"-shaped barcode scanner mounting plate (28), and the top of the other side of the second beam profile (17) is bolted to a drag chain connecting plate (31).

6. The flatness testing device according to claim 1, characterized in that: The corner positioning fixture (19) consists of two square metal frames, and the corner positioning fixture (19) is connected to the marble platform (18) by bolts.

7. The flatness testing device according to claim 1, characterized in that: Except for the corner positioning fixture (19) at the four corners of the marble platform (18), the other three corners are connected by threaded studs (32). The top of the studs (32) is provided with positioning pins (33). The top of the marble platform (18) is provided with a housing bracket (20). The positioning pins (33) quickly position the housing bracket (20).

8. The flatness testing device according to claim 1, characterized in that: A three-color light (22) is provided on the side of the column profile (8) near the corner positioning fixture (19), and a touch screen (21) is provided on the side of the three-color light (22).

9. A flatness testing device according to claim 1, characterized in that: The bottom four corners of the equipment frame (1) are welded with a fuma wheel mounting plate (5), and the bottom of the fuma wheel mounting plate (5) is connected to a fuma wheel (6) by bolts.

10. A flatness testing device according to claim 1, characterized in that: The equipment frame (1) is a box structure. The front of the equipment frame (1) is connected by a hinge to a double front preparation door (2). Both sides of the equipment frame (1) are connected by hinges to double side preparation doors (3). Both the front preparation door (2) and the side preparation door (3) are equipped with handles (4).

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