A flatness testing device

Abstract

This utility model provides a flatness testing device, relating to the field of flatness testing technology. The flatness testing device includes a platform, a first driving mechanism, a second driving mechanism, and a displacement sensor. The platform is used to place the workpiece; the platform has a hollow section; the first and second driving mechanisms are located below the platform; the first driving mechanism is arranged vertically, and the second driving mechanism is arranged horizontally; the first sliding end of the first driving mechanism is connected to the second fixed end of the second driving mechanism; the displacement sensor is located below the platform and is disposed at the second sliding end of the second driving mechanism; the transmitting and receiving ends of the displacement sensor face the hollow section respectively, for transmitting detection signals and receiving signals reflected by the lower surface of the workpiece to obtain the distance between the displacement sensor and the lower surface of the workpiece.

Description

Technical Field

[0001] This utility model belongs to the field of flatness detection technology, and in particular relates to a flatness detection device. Background Technology

[0002] In the manufacturing process of electronic products, the flatness of the products and components is a key indicator affecting their performance, assembly accuracy, and reliability. For example, printed circuit boards, liquid crystal displays, organic light-emitting diode panels, chip packaging substrates, and battery covers all exhibit surface flatness deviations (such as protrusions, depressions, or warping). These deviations can lead to problems in subsequent processes, such as poor soldering, inadequate bonding, display abnormalities, or structural stress concentration, and in severe cases, directly impact product yield. Therefore, flatness inspection is a crucial step in the intelligent manufacturing of electronic products.

[0003] Existing flatness inspection equipment mostly employs coordinate measuring machines (CMMs) or 3D camera technology, but these still have significant limitations in the specific scenarios of electronic product manufacturing. CMMs, limited by the speed of mechanical movement and the requirements of three-dimensional positioning, need to collect data by contacting the workpiece surface point by point, resulting in low inspection efficiency and difficulty in meeting the rapid inspection needs of large-scale production lines. 3D cameras, on the other hand, are limited by the complexity of image acquisition and point cloud processing. For example, they are prone to high-light interference on reflective workpiece surfaces, leading to data distortion; feature matching errors may occur in complex texture areas; and their accuracy in recognizing minute flatness deviations is insufficient. Furthermore, their equipment costs are high, and they have stringent requirements for ambient lighting conditions, hindering their widespread application in ordinary workshop environments. Utility Model Content

[0004] In view of this, the present invention provides a flatness testing device, which aims to reduce testing costs and improve testing efficiency.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a flatness detection device, including a platform for placing a workpiece; the platform is provided with a hollow portion; a first driving mechanism and a second driving mechanism are located below the platform; the first driving mechanism is arranged vertically, and the second driving mechanism is arranged horizontally; a first sliding end of the first driving mechanism is connected to a second fixed end of the second driving mechanism; a displacement sensor is located below the platform and is disposed at the second sliding end of the second driving mechanism; the transmitting end and receiving end of the displacement sensor are respectively facing the hollow portion, used to transmit detection signals and receive signals reflected by the lower surface of the workpiece to obtain the distance between the displacement sensor and the lower surface of the workpiece.

[0007] In one embodiment, a boss is formed on the upper surface of the platform, and the hollow portion is located in the middle region of the boss, the boss being used to place the workpiece.

[0008] In one embodiment, one or more positioning blocks are provided around the periphery of the boss, the height of the positioning blocks being greater than or equal to the height of the boss, and the positioning blocks being used to abut against the outer peripheral wall of the workpiece.

[0009] In one embodiment, each of the positioning blocks has a protrusion on the side facing the boss, and each of the protrusions extends above the boss to abut against the outer peripheral wall of the workpiece.

[0010] In one embodiment, one of the plurality of protrusions has a first abutment surface extending along the vertical direction, and the other has a second abutment surface extending along the transverse direction, the first abutment surface and the second abutment surface being used to abut against the outer peripheral wall of the workpiece, respectively.

[0011] In one embodiment, one of the plurality of protrusions is provided with a clearance notch to avoid protruding portions of the workpiece.

[0012] In one embodiment, the cutout portion includes a plurality of elongated holes arranged at intervals along the lateral direction, the elongated holes extending along the vertical direction.

[0013] In one embodiment, the first driving mechanism includes a first motor, a first lead screw, and a first sliding end disposed on the first lead screw. The first lead screw is arranged vertically, the output shaft of the first motor is drivenly connected to one end of the first lead screw, and the first sliding end is threadedly engaged with the first lead screw. The second driving mechanism includes a second motor, a second lead screw, and a second sliding end disposed on the second lead screw. The second lead screw is arranged horizontally, the output shaft of the second motor is drivenly connected to one end of the second lead screw, and the second sliding end is threadedly engaged with the second lead screw. The second fixed end of the second driving mechanism is fixedly connected to the first sliding end, and the top of the second sliding end is fixedly connected to the displacement sensor.

[0014] In one embodiment, an airbag-type air-float shock absorber is provided below the platform. The airbag-type air-float shock absorber includes an upper mounting base, a lower mounting base, and an airbag, with the airbag disposed between the upper mounting base and the lower mounting base. The upper mounting base is used to support the platform, and the lower mounting base is used to connect to the ground or a mounting foundation.

[0015] In one embodiment, a barcode scanning component is also provided, the barcode scanning component including a barcode scanner; the barcode scanner is installed above the platform in a horizontal or vertical direction, and the scanning end of the barcode scanner faces the upper surface of the platform.

[0016] This invention achieves non-contact distance detection of the workpiece's lower surface by placing a displacement sensor below the platform and utilizing the platform's hollowed-out portion 11. This avoids potential damage to the workpiece surface caused by traditional three-coordinate contact detection and eliminates the complex steps of three-dimensional point cloud acquisition and processing, effectively reducing equipment hardware costs and data processing time. Through the coordinated movement of the first and second drive mechanisms, the displacement sensor 4 can move flexibly in both horizontal and vertical dimensions, enabling rapid scanning of the workpiece's lower surface and significantly improving detection efficiency, meeting the rapid detection needs of large-scale production lines. Furthermore, the laser displacement sensor 4 has a high sampling frequency and detection accuracy, accurately capturing minute flatness deviations on the workpiece surface, and is less affected by ambient light and workpiece surface reflection, ensuring the stability and reliability of the detection data, which is conducive to its widespread application in ordinary workshop environments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 An overall structural diagram of an embodiment of the flatness testing device provided by this utility model;

[0019] Figure 2 for Figure 1 Exploded view of the flatness testing equipment;

[0020] Figure 3 for Figure 1 Structural diagram of the middle platform;

[0021] Figure 4 for Figure 1 Structural diagram of the drive mechanism.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Platform; 11. Hollowed-out section; 111. Elongated hole; 12. Boss; 2. First drive mechanism; 21. First sliding end; 22. First motor; 23. First lead screw; 3. Second drive mechanism; 31. Second fixed end; 32. Second motor; 33. Second lead screw; 34. Second sliding end; 4. Displacement sensor; 41. Transmitter; 42. Receiver; 5. Positioning block; 51. Protrusion; 511. First abutment surface; 512. Second abutment surface; 513. Clearance notch; 6. Airbag type air flotation shock absorber; 61. Upper mounting base; 62. Lower mounting base; 7. Scanning component; 71. Scanner. Detailed Implementation

[0024] 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 scope of protection of the present utility model.

[0025] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0026] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. "Multiple" refers to two or more. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] In the manufacturing process of electronic products, the flatness of the products and components is a key indicator affecting their performance, assembly accuracy, and reliability. For example, printed circuit boards, liquid crystal displays, organic light-emitting diode panels, chip packaging substrates, and battery covers all exhibit surface flatness deviations (such as protrusions, depressions, or warping). These deviations can lead to problems in subsequent processes, such as poor soldering, inadequate bonding, display abnormalities, or structural stress concentration, and in severe cases, directly impact product yield. Therefore, flatness inspection is a crucial step in the intelligent manufacturing of electronic products.

[0028] Existing flatness inspection equipment mostly employs coordinate measuring machines (CMMs) or 3D camera technology, but these still have significant limitations in the specific scenarios of electronic product manufacturing. CMMs, limited by the speed of mechanical movement and the requirements of three-dimensional positioning, need to collect data by contacting the workpiece surface point by point, resulting in low inspection efficiency and difficulty in meeting the rapid inspection needs of large-scale production lines. 3D cameras, on the other hand, are limited by the complexity of image acquisition and point cloud processing. For example, they are prone to high-light interference on reflective workpiece surfaces, leading to data distortion; feature matching errors may occur in complex texture areas; and their accuracy in recognizing minute flatness deviations is insufficient. Furthermore, their equipment costs are high, and they have stringent requirements for ambient lighting conditions, hindering their widespread application in ordinary workshop environments.

[0029] In view of this, the present invention provides a flatness testing device, aiming to reduce testing costs and improve testing efficiency. This flatness testing device can be used for rapid and accurate testing of the flatness of electronic products and components such as printed circuit boards, liquid crystal displays, organic light-emitting diode panels, chip packaging substrates, and battery covers.

[0030] Please see Figure 1 and Figure 2The flatness testing device includes a platform 1, a first drive mechanism 2, a second drive mechanism 3, and a displacement sensor 4. The platform 1 is used to place the workpiece to be tested, and the hollow part 11 on its surface provides a channel for the transmission of detection signals, ensuring that the displacement sensor 4 can accurately collect distance information of the lower surface of the workpiece. The first drive mechanism 2 and the second drive mechanism 3 cooperate with each other. The first drive mechanism 2 is arranged vertically (vertical is also the front-back direction as shown in the figure, represented by dashed line a in the figure), which can drive the second drive mechanism 3 and the displacement sensor 4 to move left and right. The second drive mechanism 3 is arranged horizontally (horizontal is also the left-right direction as shown in the figure, represented by dashed line b in the figure). The displacement sensor 4 is installed on the second sliding end 34 of the second drive mechanism 3. This two-dimensional drive structure allows the displacement sensor 4 to flexibly detect different areas of the lower surface of the workpiece. The transmitter and receiver of the displacement sensor 4 are both facing the hollow part 11 of the platform 1. When working, the displacement sensor 4 emits a detection signal. The signal passes through the hollow part 11 and illuminates the lower surface of the workpiece. After reflection, it is captured by the receiver 42. By analyzing and processing the emitted and received signals, the distance data between the displacement sensor 4 and the lower surface of the workpiece can be obtained, thus providing a basis for the subsequent calculation of the flatness parameters of the workpiece.

[0031] Please refer to Figure 3 Platform 1 is made of marble or a high-strength, high-rigidity, and high-wear-resistant alloy material, with a precision-ground surface, and is used to support the workpiece to be inspected. The hollow section 11 is a rectangular or oblong hole penetrating platform 1, its position corresponding to the workpiece inspection area. Please refer to... Figure 4 The first drive mechanism 2 is arranged laterally and includes a servo motor, a ball screw, and a linear guide. The second drive mechanism 3 is arranged vertically and fixed to the sliding end of the first drive mechanism 2, also including a servo motor, a ball screw, and a linear guide. The displacement sensor 4 is a laser displacement sensor, with its transmitting end 41 and receiving end 42 integrated in the same housing and fixed to the sliding end of the second drive mechanism 3. The detection direction is vertically upward, directly facing the hollow part 11. Of course, multiple displacement sensors 4 can be set simultaneously to detect multiple points at the same time, improving detection efficiency.

[0032] After the workpiece is placed on platform 1, the first drive mechanism 2 drives the second drive mechanism 3 and displacement sensor 4 to move along the a-axis to achieve horizontal scanning; the second drive mechanism 3 drives the displacement sensor 4 to move along the b-axis to achieve vertical scanning. The combined action of these two mechanisms enables the displacement sensor 4 to perform full coverage or fixed-point detection of the lower surface of the workpiece according to a preset path (such as a grid path, spiral path, or custom detection point array). During the detection process, the displacement sensor 4 collects distance data in real time, which is transmitted to the control system via a signal line. The distance value is then compared with the workpiece's reference plane (the theoretical plane of the upper surface of platform 1 obtained through pre-calibration) to calculate the height deviation value of each detection point. Based on preset flatness evaluation standards (such as maximum deviation, flatness error, warpage, etc.), the system automatically analyzes and determines whether the workpiece is qualified.

[0033] The flatness detection setup provided in this embodiment includes a platform 1, a first driving mechanism 2, a second driving mechanism 3, and a displacement sensor 4. The platform 1 is used to place the workpiece; the platform 1 is provided with a hollow portion 11; the first driving mechanism 2 and the second driving mechanism 3 are located below the platform 1; the first driving mechanism 2 is arranged vertically, and the second driving mechanism 3 is arranged horizontally; the first sliding end 21 of the first driving mechanism 2 is connected to the second fixed end 31 of the second driving mechanism 3; the displacement sensor 4 is located below the platform 1 and is disposed at the second sliding end 34 of the second driving mechanism 3; the transmitting end 41 and the receiving end 42 of the displacement sensor 4 face the hollow portion 11 respectively, and are used to transmit detection signals and receive signals reflected by the lower surface of the workpiece to obtain the distance between the displacement sensor 4 and the lower surface of the workpiece. This embodiment of the present invention, by placing the displacement sensor 4 below the platform 1 and utilizing the hollow portion 11 of the platform 1 to achieve non-contact distance detection of the lower surface of the workpiece, avoids the damage that traditional three-coordinate contact detection may cause to the workpiece surface, and at the same time eliminates the complex three-dimensional point cloud acquisition and processing steps, effectively reducing the hardware cost of the equipment and the data processing time. Through the coordinated movement of the first driving mechanism 2 and the second driving mechanism 3, the displacement sensor 4 can move flexibly in both the horizontal and vertical dimensions, enabling rapid scanning of the lower surface of the workpiece. This significantly improves detection efficiency and meets the rapid detection needs of large-scale production lines. Furthermore, the laser displacement sensor 4 has a high sampling frequency and detection accuracy, accurately capturing minute flatness deviations on the workpiece surface. It is also less affected by ambient light and workpiece surface reflections, ensuring the stability and reliability of the detection data and facilitating its widespread application in ordinary workshop environments.

[0034] In some embodiments, please refer to Figure 3 To facilitate precision machining, a boss 12 is provided on platform 1. Specifically, a boss 12 is formed on the upper surface of platform 1, and a hollow part 11 is located in the middle area of ​​the boss 12. The boss 12 is used to place workpieces.

[0035] The design of the boss 12 reduces the precision machining range of the platform 1 from the entire upper surface to the area of ​​the boss 12, significantly reducing the machining difficulty. Traditionally, the platform 1 needs to ensure flatness across its entire surface, while the boss 12 design only requires focusing on a smaller support surface. During machining, the boss 12 can be specifically precision ground using a dedicated grinding head, avoiding problems such as insufficient platform precision and high machining costs caused by the large overall area of ​​the platform 1. Simultaneously, the placement of the hollowed-out portion 11 in the middle of the boss 12 allows it to be formed by wire cutting or laser cutting before the boss 12 is machined, reducing the impact of other machining processes on the precision of the boss 12.

[0036] This embodiment of the utility model optimizes processing costs and testing reliability while ensuring the core support accuracy of the platform 1 through the targeted processing design of the boss 12.

[0037] In some embodiments, please continue reading Figure 3 To facilitate workpiece positioning, positioning blocks 5 are added around the boss 12. Specifically, one or more positioning blocks 5 are provided around the boss 12, the height of the positioning blocks 5 is greater than or equal to the height of the boss 12, and the positioning blocks 5 are used to abut against the outer peripheral wall of the workpiece.

[0038] Among them, the positioning block 5 establishes the positioning reference of the workpiece in the plane of platform 1 by rigidly abutting against the outer peripheral wall of the workpiece: when the workpiece is placed on the boss 12, since the height of the positioning block 5 is greater than or equal to the height of the boss 12, the outer peripheral wall of the workpiece naturally fits against the abutting surface of the positioning block 5. With the help of the cooperative constraints of multiple positioning blocks 5 (such as two adjacent sides of a rectangular workpiece corresponding to two positioning blocks 5 respectively), the translational and rotational degrees of freedom of the workpiece in the horizontal and vertical directions are eliminated.

[0039] When manually placing the workpiece, there is no need for repeated alignment; it only needs to be positioned against the edge of the positioning block 5, thus shortening the loading time for a single workpiece. In automated loading scenarios, the robotic arm only needs to place the workpiece roughly in the area of ​​the boss 12, and the positioning block 5 can complete the precise positioning, reducing the requirements for the positioning accuracy of the robotic arm.

[0040] This embodiment of the utility model simplifies the operation process and ensures detection accuracy through the collaborative constraint design of the positioning block 5, thereby improving positioning efficiency and detection reliability.

[0041] In some embodiments, please continue reading Figure 3 To ensure that the entire workpiece is within the area of ​​the boss 12, the positioning blocks 5 are optimized to extend outwards. Specifically, each positioning block 5 has a protrusion 51 on the side facing the boss 12, and each protrusion 51 extends into the top of the boss 12 to abut against the outer peripheral wall of the workpiece.

[0042] The protrusion 51 and the positioning block 5 are integrally molded, and the material is consistent with that of the positioning block 5 to ensure overall rigidity. The protrusion 51 extends horizontally into the top of the boss 12, only slightly, which avoids excessive insertion that may affect the placement of the workpiece, and can accurately constrain the edge of the workpiece.

[0043] When the protrusion 51 extends above the boss 12, its contact position is closer to the center of the workpiece than that of the traditional positioning block 5, creating an "inward tightening" constraint effect. This design solves the problem that the traditional positioning block 5 only constrains the outer periphery of the boss 12, which can easily lead to the workpiece being partially suspended. For example, when inspecting a circuit board, the protrusion 51 can ensure that all four corners of the circuit board rest completely on the boss 12, avoiding interference from the flatness inspection caused by the micro-deformation caused by the corners being suspended.

[0044] This embodiment of the utility model optimizes the protruding part 51 of the positioning block 5 to construct a more accurate and stable workpiece positioning system, which is beneficial for flatness detection.

[0045] In some embodiments, please continue reading Figure 3 To facilitate calculations, it is necessary to determine the placement orientation of the workpiece. Therefore, the contact surface of the protrusion 51 is defined. Specifically, one of the protrusions 51 has a first contact surface 511 extending vertically, and the other has a second contact surface 512 extending laterally. The first contact surface 511 and the second contact surface 512 are respectively used to abut against the outer peripheral wall of the workpiece.

[0046] Since the first abutment surface 511 extends vertically and the second abutment surface 512 extends horizontally, the first abutment surface 511 and the second abutment surface 512 are perpendicular to each other. The mutual perpendicularity of the first abutment surface 511 and the second abutment surface 512 forms a positioning structure similar to the origin of a Cartesian coordinate system. When the workpiece is placed, its two adjacent outer peripheral walls will respectively conform to these two abutment surfaces, precisely defining the horizontal and vertical position of the workpiece, thus determining the unique placement posture of the workpiece on platform 1. This deterministic posture allows the coordinates of any point on the workpiece in the equipment's detection coordinate system to be derived through simple geometric relationships, eliminating the need for complex posture recognition and coordinate transformation algorithms. For example, knowing the distance between a vertex of the workpiece and the first and second abutment surfaces 512, combined with the workpiece's own dimensional parameters, the specific coordinates of that vertex in the detection coordinate system can be quickly determined.

[0047] This embodiment of the utility model establishes a standardized positioning reference by using the vertical design of the first contact surface 511 and the second contact surface 512. This fundamentally solves the problems of detection error and calculation complexity caused by the uncertainty of the workpiece placement posture, and achieves a synergistic improvement in detection accuracy and efficiency.

[0048] In some embodiments, please continue reading Figure 3 Considering that some workpieces have protruding edges, the protrusions 51 are designed to avoid protruding parts. Specifically, one of the protrusions 51 is provided with a clearance notch 513 to avoid protruding parts of the workpiece.

[0049] The shape of the clearance notch 513 matches the contour of the protruding part of the workpiece, and common shapes include rectangle (as shown in the figure), semicircle, or trapezoid. The edges of the notch can be rounded to avoid scratching the protruding part or edge of the workpiece.

[0050] When a workpiece with a raised structure is placed on the boss 12, the protruding part 51 with the clearance notch 513 provides sufficient space to accommodate the raised part of the workpiece, preventing interference between the protruding part 51 and the raised part. This clearance function ensures that the contact surface of other protruding parts 51 can fit tightly against the outer peripheral wall of the workpiece, thus not affecting the overall positioning accuracy. At the same time, since the clearance notch 513 is adapted to the shape and size of the raised part, the raised part will naturally fall into the notch during the placement of the workpiece, which can also play an auxiliary positioning role, further restricting the rotational freedom of the workpiece and making the placement posture of the workpiece more stable.

[0051] This embodiment of the utility model improves the stability and versatility of the positioning system by providing an avoidance notch 513 in the protrusion 51 that matches the contour of the protruding part of the workpiece, while being compatible with the inspection requirements of irregularly shaped workpieces.

[0052] In some embodiments, please continue reading Figure 3 In order to both support the workpiece and facilitate the regular acquisition of the positions of the lower surface of the workpiece, the hollow portion 11 is appropriately defined. Specifically, the hollow portion 11 includes a plurality of elongated holes 111 arranged at intervals along the horizontal direction, and the elongated holes 111 extend vertically.

[0053] The number of elongated holes 111 in the hollowed-out section 11 can be determined according to the transverse dimensions of the workpiece, ensuring coverage of the entire transverse detection area of ​​the workpiece. Multiple elongated holes 111, spaced laterally and extending vertically, form multiple transversely distributed support strips on the platform 1 when supporting the workpiece. These strips stably support the workpiece and prevent deformation due to excessive hollowed-out area. When acquiring points on the lower surface of the workpiece, these regularly arranged elongated holes 111 provide clear guidance for the detection path of the displacement sensor 4. When the first drive mechanism 2 moves the displacement sensor 4 vertically, the vertical extension of the elongated holes 111 ensures that the sensor can detect the lower surface of the workpiece at any position within the vertical range. When the second drive mechanism 3 moves the sensor laterally, the multiple spaced elongated holes 111 allow the sensor to acquire detection points at different transverse positions, thus regularly covering various areas of the lower surface of the workpiece, enabling comprehensive detection without complex path planning.

[0054] This utility model embodiment designs the hollowed-out part 11 as a plurality of elongated holes 111 arranged horizontally at intervals and extending vertically, thus constructing an integrated structure for bearing and detection. On the one hand, it realizes the stable placement of the workpiece, and on the other hand, it realizes detection efficiency and data reliability.

[0055] In some embodiments, please refer to Figure 4 Both the first drive mechanism 2 and the second drive mechanism 3 employ a combination of motor and lead screw drive. Specifically, the first drive mechanism 2 includes a first motor 22, a first lead screw 23, and a first sliding end 21 disposed on the first lead screw 23. The first lead screw 23 is arranged vertically, and the output shaft of the first motor 22 is drivenly connected to one end of the first lead screw 23. The first sliding end 21 is threadedly engaged with the first lead screw 23. The second drive mechanism 3 includes a second motor 32, a second lead screw 33, and a second sliding end 34 disposed on the second lead screw 33. The second lead screw 33 is arranged horizontally, and the output shaft of the second motor 32 is drivenly connected to one end of the second lead screw 33. The second sliding end 34 is threadedly engaged with the second lead screw 33. The second fixed end 31 of the second drive mechanism 3 is fixedly connected to the first sliding end 21, and the top of the second sliding end 34 is fixedly connected to the displacement sensor 4.

[0056] The first motor 22 and the second motor 32 can be high-precision servo motors with closed-loop position control to ensure drive accuracy. The first lead screw 23 and the second lead screw 33 can be precision ball screws. Both the first sliding end 21 and the second sliding end 34 are equipped with linear guides to ensure smooth sliding and reduce the impact of vibration on detection. The first lead screw 23 is arranged vertically and its two ends are fixed by bearing seats, and it is connected to the output shaft of the first motor 22 via a coupling. The second lead screw 33 is arranged horizontally and is also fixed to the second fixed end 31 by bearing seats. The second fixed end 31 is rigidly connected to the first sliding end 21 by high-strength bolts to ensure stable force transmission.

[0057] When the equipment is running, the first motor 22 receives a control signal and drives the first lead screw 23 to rotate. Since the first sliding end 21 and the first lead screw 23 are threaded together, the rotational motion is converted into linear motion. Constrained by the linear guide rail, the first sliding end 21 moves vertically, thereby driving the second drive mechanism 3, which is fixedly connected to it, to move vertically as a whole. Similarly, when the second motor 32 drives the second lead screw 33 to rotate, since the second sliding end 34 and the second lead screw 33 are threaded together, the second sliding end 34 converts the rotational motion into linear motion in the lateral direction, thereby driving the displacement sensor 4 to move laterally. Through independent driving in two directions, the position of the displacement sensor 4 in the two-dimensional plane can be precisely controlled, allowing it to scan and detect the lower surface of the workpiece according to a preset path.

[0058] This utility model embodiment constructs a high-precision and high-stability two-dimensional drive system through a combination of motor and lead screw, which can achieve accuracy and efficiency in flatness detection.

[0059] In some embodiments, please refer to Figure 1 and Figure 2 To reduce the impact of external vibrations on measurement accuracy, an airbag-type air-float shock absorber 6 is used to support the platform 1. Specifically, the airbag-type air-float shock absorber 6 includes an upper mounting base 61, a lower mounting base 62, and an airbag, with the airbag positioned between the upper mounting base 61 and the lower mounting base 62; the upper mounting base 61 is used to support the platform 1, and the lower mounting base 62 is used to connect to the ground or mounting foundation.

[0060] This embodiment of the invention constructs a vibration isolation system through the elastic support structure of the airbag-type air-floating shock absorber 6. The compressed gas inside the airbag utilizes its compressibility and elastic deformation characteristics to quickly absorb vibration energy transmitted from the external environment. When external forces such as workshop floor vibration or equipment operation impact act on the lower mounting base 62, the airbag converts the vibration energy into internal gas energy through volume contraction and expansion, significantly reducing the efficiency of vibration transmission to the platform 1.

[0061] In some embodiments, please refer to Figure 1 and Figure 2 In order to facilitate the construction of an information traceability chain in the testing process, a barcode scanning component 7 is also provided. Specifically, the barcode scanning component 7 includes a barcode scanner 71; the barcode scanner 71 is installed horizontally or vertically above the platform 1, with the scanning end of the barcode scanner 71 facing the upper surface of the platform 1.

[0062] Once the workpiece is placed on platform 1 and positioned, the control system triggers the barcode scanner 71 to operate. The scanning end of the barcode scanner 71 emits a laser to illuminate the barcode area on the workpiece surface. After the laser is reflected by the barcode, it is received by the image sensor inside the barcode scanner 71. The reflected light signal is decoded by the built-in algorithm to extract the unique identification information of the workpiece (such as batch number, production date, supplier code, etc.).

[0063] The addition of barcode scanning component 7 establishes an information traceability chain for the inspection process. The workpiece identification acquired by barcode scanner 71 and the flatness data collected by displacement sensor 4 are linked and stored through the control system, forming a "one item, one code, one data" correspondence. When a workpiece fails inspection, managers can quickly trace its production batch, previous process parameters, and inspection time through the barcode to pinpoint the root cause of the quality problem (e.g., if a batch of battery cover plates has excessive flatness due to wear of the stamping die, barcode tracing can pinpoint the usage period of the problematic die). For qualified workpieces, the barcode information and inspection data can be synchronized to the factory's MES system, providing quality basis for subsequent assembly processes and preventing defective products from flowing into downstream stages.

[0064] This utility model embodiment utilizes the precise information collection and data association mechanism of the barcode scanning component 7 to establish an information traceability chain from workpiece production and inspection to subsequent circulation, thereby improving the controllability of quality.

[0065] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A flatness testing device, characterized in that, include: A platform for placing workpieces; the platform is provided with a hollow section; The first drive mechanism and the second drive mechanism are located below the platform; The first driving mechanism is arranged vertically, and the second driving mechanism is arranged horizontally; the first sliding end of the first driving mechanism is connected to the second fixed end of the second driving mechanism. A displacement sensor is located below the platform and is disposed at the second sliding end of the second drive mechanism; the transmitting end and receiving end of the displacement sensor are respectively facing the hollow part, and are used to transmit detection signals and receive signals reflected by the lower surface of the workpiece to obtain the distance between the displacement sensor and the lower surface of the workpiece.

2. The flatness testing equipment according to claim 1, characterized in that, The platform has a boss on its upper surface, and the hollow part is located in the middle area of ​​the boss. The boss is used to place the workpiece.

3. The flatness testing equipment according to claim 2, characterized in that, One or more positioning blocks are provided around the boss, the height of the positioning blocks is greater than or equal to the height of the boss, and the positioning blocks are used to abut against the outer peripheral wall of the workpiece.

4. The flatness testing equipment according to claim 3, characterized in that, Each of the positioning blocks has a protrusion on the side facing the boss, and each of the protrusions extends into the top of the boss to abut against the outer peripheral wall of the workpiece.

5. The flatness testing equipment according to claim 4, characterized in that, One of the plurality of protrusions has a first abutment surface extending along the vertical direction, and the other has a second abutment surface extending along the horizontal direction, the first abutment surface and the second abutment surface being used to abut against the outer peripheral wall of the workpiece, respectively.

6. The flatness testing equipment according to claim 4 or 5, characterized in that, One of the plurality of protrusions is provided with a clearance notch to avoid protruding parts of the workpiece.

7. The flatness testing equipment according to claim 1, characterized in that, The hollowed-out portion includes a plurality of elongated holes arranged at intervals along the horizontal direction, and the elongated holes extend along the vertical direction.

8. The flatness testing equipment according to claim 1, characterized in that, The first drive mechanism includes a first motor, a first lead screw, and a first sliding end disposed on the first lead screw. The first lead screw is arranged vertically, the output shaft of the first motor is connected to one end of the first lead screw, and the first sliding end is threadedly engaged with the first lead screw. The second drive mechanism includes a second motor, a second lead screw, and a second sliding end disposed on the second lead screw. The second lead screw is arranged laterally. The output shaft of the second motor is connected to one end of the second lead screw in a transmission connection. The second sliding end is threadedly engaged with the second lead screw. The second fixed end of the second driving mechanism is fixedly connected to the first sliding end, and the top of the second sliding end is fixedly connected to the displacement sensor.

9. The flatness testing equipment according to claim 1, characterized in that, An airbag-type air-float shock absorber is provided below the platform. The airbag-type air-float shock absorber includes an upper mounting base, a lower mounting base, and an airbag. The airbag is disposed between the upper mounting base and the lower mounting base. The upper mounting base is used to support the platform, and the lower mounting base is used to connect to the ground or mounting foundation.

10. The flatness testing equipment according to claim 1, characterized in that, A barcode scanning component is also provided, which includes a barcode scanner; the barcode scanner is installed above the platform in a horizontal or vertical direction, with the scanning end of the barcode scanner facing the upper surface of the platform.

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