Flatness detection device and method for detecting visual flatness of flat plate

Abstract

The invention relates to a detection device, in particular to a flatness detection device and a detection method for the visual flatness of a flat plate. The lifting adjusting structure comprises a reciprocating lead screw rotationally connected to the portal frame, a motor and a sliding mechanism, wherein an output shaft of the motor is coaxially fixed to one end of the reciprocating lead screw, the motor is installed on one side of the portal frame, and the sliding mechanism is arranged on the portal frame in a sliding manner and slidably sleeves the reciprocating lead screw. The translation mechanism is arranged on the sliding mechanism and is in threaded connection with the reciprocating screw rod; and the lifting mechanism is arranged in the translation mechanism and is connected with the sliding mechanism. Through reasonable design of the structure combination and connection relation of the lifting adjusting structure, when the detector detects a workpiece, the detector can detect the workpiece multiple times at different heights, and through combination and comparison of multiple detection data, accidental deviation existing in the detection device can be eliminated, and the detection accuracy is improved. The accuracy of the flatness detection result is improved, and the use effect is improved.

Description

Technical Field

[0001] The present invention relates to a detection device, in particular to a flatness detection device and a detection method for the visual flatness of a flat plate. Background Art

[0002] A flatness detection device is a device used to measure the flatness or planarity of an object's surface. Flatness refers to the degree of deviation between a plane and an ideal plane, usually measuring the gaps between different points on the surface to evaluate whether it is completely flat. In many industrial fields, especially in machining, mold manufacturing, precision instruments, and the manufacturing of electronic components, the control of flatness is crucial. If the surface of a component is not flat, it may affect its assembly accuracy, operating stability, and lifespan. Therefore, a flatness detection device can ensure that the surface of the components meets the design requirements, thus guaranteeing product quality.

[0003] When the current flatness detection device is in use, there will be accidental deviations in the detection data, and these accidental deviations cannot be completely solved. The accidental deviations will affect the accuracy of the detection data. To eliminate the existing accidental deviations, multiple detections are required, and then the data from multiple detections are comprehensively compared to improve the accuracy of the detection data. When the existing flatness detection device conducts multiple detections, it usually performs the detections on the same horizontal plane, resulting in the inability to eliminate accidental deviations in the detection data and affecting the accuracy of the detection data. For those that can perform lifting and adjustment for multiple detections, multiple drive sources are required for separate driving. The addition of multiple drive sources will increase the failure rate of the flatness detection device and also increase the production cost of the flatness detection device. Summary of the Invention

[0004] The purpose of the present invention is to provide a flatness detection device and a detection method for the visual flatness of a flat plate to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution:

[0006] A flatness detection device includes a detection frame, a placement plate that can be horizontally driven and arranged on the detection frame, and a gantry fixed on the detection frame. An elevation adjustment structure is arranged on the gantry, and a detector is arranged on the elevation adjustment structure.

[0007] The lifting and adjusting structure includes a reciprocating screw rod rotatably connected to the gantry, a motor with an output shaft coaxially fixed to one end of the reciprocating screw rod and installed on one side of the gantry, a sliding mechanism slidably arranged on the gantry and sleeved on the reciprocating screw rod, a translation mechanism arranged on the sliding mechanism and threadedly connected to the reciprocating screw rod, and a lifting mechanism arranged inside the translation mechanism and connected to the sliding mechanism. The detector is slidably inserted on the sliding mechanism, and the detector is connected to the lifting mechanism;

[0008] When the motor operates, it drives the reciprocating screw rod to rotate on the gantry. During the rotation of the reciprocating screw rod, it drives the sliding mechanism to slide on the gantry. When the sliding mechanism moves to one end of the gantry, under the drive of the reciprocating screw rod, the translation mechanism slides inside the sliding mechanism. During the movement of the translation mechanism, the lifting mechanism moves up and down. When the lifting mechanism operates, it drives the detector to perform lifting and adjusting on the sliding mechanism.

[0009] For the flatness detection device as described above: A plug-in frame is fixedly connected to the back of the detector, and a sliding frame is fixedly connected to the detector at the inner ring part of the plug-in frame;

[0010] A sliding groove is formed on the gantry, and the sliding mechanism is slidably arranged in the sliding groove;

[0011] Plug-in holes are formed on the gantry on both sides of the reciprocating screw rod, and unlocking components are arranged at both ends of the gantry.

[0012] For the flatness detection device as described above: The sliding mechanism includes a moving frame slidably connected in the sliding groove and two plugging components respectively slidably connected to both sides of the moving frame. The plugging components are connected to the unlocking components;

[0013] Both sides of the moving frame are provided with bosses slidably inserted into the plug-in frame. Adjusting grooves are formed on the upper and lower inner walls of the cavity of the moving frame. A first rack is arranged on the inner wall of one end of the adjusting groove at the bottom, and a second rack is arranged at a position offset from the first rack on the inner wall of the other end of the adjusting groove at the top. Lifting grooves are formed on both sides of the moving frame;

[0014] Chute grooves are symmetrically formed on the moving frame at the position of the lifting grooves. A central hole is formed through the moving frame between the two chute grooves. The central hole is sleeved on the reciprocating screw rod in a sliding manner. A sliding hole is formed through the moving frame between the two central holes.

[0015] Flatness detection device as described above: The translation mechanism includes a first T-shaped block and four insertion rods fixedly connected to both sides of the first T-shaped block. The first T-shaped block is slidably connected in the adjustment groove;

[0016] A threaded hole is provided at the central part of the first T-shaped block, and the threaded hole is threadedly connected to the reciprocating lead screw. Four springs are provided on both sides of the first T-shaped block;

[0017] One end of each of the four springs abuts against the first T-shaped block, and the other end abuts against the inner wall of the moving frame.

[0018] Flatness detection device as described above: The lifting mechanism includes a second T-shaped block and a screw rod threadedly connected to the second T-shaped block. The second T-shaped block is vertically slidably connected in a vertical groove provided on the first T-shaped block, and the screw rod is rotatably connected to the first T-shaped block;

[0019] The second T-shaped block is horizontally slidably connected in the sliding frame. Both ends of the screw rod are respectively connected with a first gear and a second gear through two one-way ratchets. The first gear is in one-way rotational engagement with the second rack, and the second gear is in one-way rotational engagement with the first rack.

[0020] Flatness detection device as described above: The plugging component includes two second abutting blocks respectively slidably connected in the sliding groove and a fixing plate fixedly connected to the two second abutting blocks. The fixing plate is slidably connected in the lifting groove;

[0021] An activity groove is provided on the fixing plate. Second through holes are provided on the fixing plate on both sides of the activity groove. The activity groove is slidably connected to the reciprocating lead screw. The length dimension of the activity groove is two diameter dimensions of the reciprocating lead screw. The second abutting block is connected to the unlocking component.

[0022] Flatness detection device as described above: The unlocking component includes two first abutting blocks abutting against the second abutting block and a connecting plate fixedly connected to the two first abutting blocks. The connecting plate is installed on the gantry;

[0023] A sleeve hole is provided at the central part of the connecting plate. The sleeve hole is rotatably sleeved with the reciprocating lead screw. The connecting plate is fixedly connected to the gantry. First through holes are provided on the connecting plate on both sides of the sleeve hole.

[0024] Flatness detection device as described above: The insertion rod is slidably inserted into the insertion hole, the first through hole, the sliding hole and the second through hole.

[0025] Method for detecting the visual flatness of a flat plate using the flatness detection device as described above, including the following steps:

[0026] Step 1: Place the flat middle frame to be subjected to flatness detection on the placement plate. Through the operation of the detection rack, the placement plate moves horizontally on the detection rack under the gantry. The motor runs to drive the reciprocating lead screw to rotate, causing the threaded hole threadedly connected to the reciprocating lead screw to move;

[0027] Step 2: When the first T-shaped block moves, the moving frame moves in the sliding groove opened on the gantry. When the moving frame moves to one end of the sliding groove, the first T-shaped block moves a certain distance in the adjustment groove opened on the moving frame under the drive of the reciprocating lead screw;

[0028] Step 3: When the first T-shaped block moves in the adjustment groove, the second T-shaped block moves up and down on the first T-shaped block, and the second T-shaped block drives the detector to approach or move away from the placement plate;

[0029] Step 4: After the first T-shaped block moves to one end in the adjustment groove, it moves back and forth along the spiral thread of the reciprocating lead screw, driving the detector after lifting adjustment to move horizontally on the gantry;

[0030] Step 5: After the detector moves to the other end of the gantry, remove the flat middle frame that has been detected currently.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] By reasonably designing the structural combination and connection relationship of the lifting adjustment structure, when the detector detects the workpiece, the detector can perform multiple detections on the workpiece at different heights. Through the combination and comparison of multiple detection data, the accidental deviation existing in the detection device can be eliminated, the accuracy of the flatness detection result can be improved, and the use effect can be improved.

[0033] Specifically, the motor drives the reciprocating lead screw to rotate, enabling the sliding mechanism to adjust and move horizontally on the gantry, which can drive the detector to synchronously adjust and move, so that the detector performs flatness scanning detection on the workpiece on the placement plate. When the sliding mechanism moves to one end and cannot move, at this time, the plugging component on the sliding mechanism abuts against the unlocking component, so that the translation mechanism inside the sliding mechanism can slide and adjust inside. When the translation mechanism adjusts and moves, the lifting mechanism can operate.

[0034] Then, through the coordinated connection of the lifting mechanism and the sliding mechanism, when the translation mechanism moves and adjusts inside the sliding mechanism, the lifting mechanism can perform lifting adjustment on the translation mechanism. The lifting mechanism drives the detector to perform relative lifting adjustment on the sliding mechanism, controlling the distance between the detector and the workpiece placed on the placement plate, enabling the detector to perform scanning detections at multiple different detection positions on the workpiece. When the translation mechanism moves to one end inside the sliding mechanism, due to the design of the reciprocating lead screw, the translation mechanism can move back and forth on the reciprocating lead screw. At this time, the lowered detector, under the cooperation of the translation mechanism and the sliding mechanism, can slide back and forth and adjust on the gantry, thereby realizing the detection of different heights of the workpiece. By comparing the detection data at multiple different positions, comprehensive data can be obtained, thus reducing the inaccuracy of the detection data caused by accidental deviations and affecting the production and detection use of the workpiece. By designing to reduce the use of drive sources, the production cost is reduced. Brief Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of the overall flatness detection device.

[0036] Figure 2 It is a schematic structural diagram of the gantry separated from the main body in the flatness detection device.

[0037] Figure 3 It is a schematic structural diagram of another orientation of the overall flatness detection device.

[0038] Figure 4 It is a schematic structural diagram of the inside of the gantry in the flatness detection device.

[0039] Figure 5 It is a schematic structural diagram of the back of the detector in the flatness detection device.

[0040] Figure 6 It is a schematic structural diagram of the gantry in the flatness detection device.

[0041] Figure 7 It is a schematic structural diagram of the unlocking component in the flatness detection device.

[0042] Figure 8 It is a schematic structural diagram of the sliding mechanism in the flatness detection device.

[0043] Figure 9 It is a schematic structural diagram of two orientations of the sliding mechanism in the flatness detection device.

[0044] Figure 10 It is a schematic structural diagram of the translation mechanism in the flatness detection device.

[0045] Figure 11 It is a schematic structural diagram of the lifting mechanism in the flatness detection device.

[0046] Figure 12 It is a schematic structural diagram of a plugging component in a flatness detection device.

[0047] In the figure: 1, detection frame; 2, placement plate; 3, gantry; 4, detector; 5, insertion frame; 6, sliding frame; 7, sliding groove; 8, reciprocating lead screw; 9, motor; 10, insertion hole; 11, first abutting block; 12, connecting plate; 13, sleeving hole; 14, first through hole; 15, moving frame; 16, adjusting groove; 17, first rack; 18, second rack; 19, lifting groove; 20, sliding groove; 21, central hole; 22, sliding hole; 23, first T-shaped block; 24, threaded hole; 25, insertion rod; 26, spring; 27, second T-shaped block; 28, screw rod; 29, first gear; 30, second gear; 31, second abutting block; 32, fixing plate; 33, moving groove; 34, second through hole. Specific embodiments

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0049] Please refer to Figures 1 to 4 , in the embodiments of the present invention, a flatness detection device includes a detection frame 1, a placement plate 2 that can be horizontally driven and arranged on the detection frame 1, and a gantry 3 fixed on the detection frame 1. An elevation adjustment structure is arranged on the gantry 3, and a detector 4 is arranged on the elevation adjustment structure;

[0050] The elevation adjustment structure includes a reciprocating lead screw 8 rotatably connected to the gantry 3, a motor 9 whose output shaft is coaxially fixed to one end of the reciprocating lead screw 8 and is installed on one side of the gantry 3, a sliding mechanism slidably arranged on the gantry 3 and slidably sleeved with the reciprocating lead screw 8, a translation mechanism arranged on the sliding mechanism and threadedly connected to the reciprocating lead screw 8, and a lifting mechanism arranged inside the translation mechanism and connected to the sliding mechanism. The detector 4 is slidably inserted on the sliding mechanism, and the detector 4 is connected to the lifting mechanism;

[0051] When the motor 9 operates, it drives the reciprocating lead screw 8 to rotate on the gantry 3. During the rotation of the reciprocating lead screw 8, it drives the sliding mechanism to slide on the gantry 3. When the sliding mechanism moves to one end of the gantry 3, the translation mechanism slides inside the sliding mechanism under the drive of the reciprocating lead screw 8. During the movement of the translation mechanism, the lifting mechanism moves up and down. When the lifting mechanism operates, it drives the detector 4 to perform elevation adjustment on the sliding mechanism.

[0052] In this embodiment, by placing the workpiece to be detected on the placement plate 2 and running the driving machine inside the detection rack 1, the placement plate 2 slides horizontally and adjusts below the gantry 3. By running the motor 9, the reciprocating lead screw 8 can rotate on the gantry 3, causing the translation mechanism threadedly connected to the reciprocating lead screw 8 to slide on the gantry 3. The translation mechanism is connected to the sliding mechanism. When the translation mechanism slides and adjusts, it can drive the sliding mechanism to slide on the gantry 3. Since the detector 4 and the sliding mechanism are vertically slidably inserted, when the sliding mechanism slides horizontally and adjusts, it can drive the detector 4 to slide on the gantry 3, so that the detector 4 scans and detects the workpiece placed on the placement plate 2 below the gantry 3. When the sliding mechanism moves to one end of the gantry 3 and cannot move, the translation mechanism can slide and adjust inside the sliding mechanism under the drive of the reciprocating lead screw 8. When the translation mechanism slides and adjusts, the lifting mechanism vertically arranged on the translation mechanism will lift and adjust. Since the lifting mechanism is horizontally slidably inserted into the detector 4, when the lifting mechanism lifts and adjusts, the detector 4 can be lifted and adjusted on the sliding mechanism, so as to control the distance between the detection end of the detector 4 and the workpiece. When the reciprocating lead screw 8 rotates continuously, the translation mechanism can move back and forth, so that the detector 4 after descending can scan and detect the workpiece placed on the placement plate 2 again from different heights. By synthesizing the data obtained from multiple detection scans, the accidental deviation during single detection can be avoided, which affects the accuracy of the flatness detection of the workpiece and improves the detection effect of flatness.

[0053] Please refer to Figure 5 、 Figure 6 As a further solution of the present invention, a plug-in frame 5 is fixedly connected to the back of the detector 4, and a sliding frame 6 is fixedly connected to the detector 4 at the inner ring part of the plug-in frame 5;

[0054] A sliding groove 7 is opened on the gantry 3, and the sliding mechanism is slidably arranged in the sliding groove 7;

[0055] Insertion holes 10 are opened on the gantry 3 on both sides of the reciprocating lead screw 8, and unlocking components are arranged at both ends of the gantry 3.

[0056] In this embodiment, the detector 4 is used for detecting the flatness of the workpiece to meet the detection requirements. The detector 4 is an existing publicly disclosed technical means and will not be elaborated here. Through the design of the plug-in frame 5 and the sliding frame 6 on the back of the detector 4, the detector 4 meets the connection use of the sliding mechanism and the lifting mechanism.

[0057] Please refer to Figure 8 、 Figure 9, As a further solution of the present invention, the sliding mechanism includes a moving frame 15 slidably connected in the sliding groove 7 and two plugging components respectively slidably connected to both sides of the moving frame 15, and the plugging components are connected to the unlocking component;

[0058] Both sides of the moving frame 15 are provided with bosses slidably inserted into the plugging frame 5. Both the upper and lower inner walls of the cavity of the moving frame 15 are provided with adjusting grooves 16. One end inner wall of the adjusting groove 16 at the bottom is provided with a first rack 17, and the other end inner wall of the adjusting groove 16 at the top is provided with a second rack 18 misaligned with the first rack 17. Both sides of the moving frame 15 are provided with lifting grooves 19;

[0059] Symmetrically arranged sliding grooves 20 are provided on the moving frame 15 at the position of the lifting groove 19. A central hole 21 is penetrated through the moving frame 15 between the two sliding grooves 20. The central hole 21 is slidably sleeved with the reciprocating lead screw 8. A sliding hole 22 is penetrated through the moving frame 15 between the two central holes 21.

[0060] In this embodiment, the moving frame 15 is slidably adjusted in the sliding groove 7 opened on the gantry 3. Through the limit and guidance of the sliding groove 7, the moving frame 15 can only be horizontally slidably adjusted on the gantry 3. The central hole 21 opened on the moving frame 15 is slidably sleeved with the reciprocating lead screw 8. When the reciprocating lead screw 8 rotates, it will not affect the sliding adjustment of the moving frame 15. The first rack 17 and the second rack 18 are respectively misaligned on the upper and lower sides of the adjusting groove 16 opened on the inner wall of the moving frame 15, meeting the connection and use with the lifting mechanism.

[0061] Please refer to Figure 10 , As a further solution of the present invention, the translation mechanism includes a first T-shaped block 23 and four plugging rods 25 fixedly connected to both sides of the first T-shaped block 23. The first T-shaped block 23 is slidably connected in the adjusting groove 16;

[0062] A threaded hole 24 is provided at the central part of the first T-shaped block 23. The threaded hole 24 is threadedly connected to the reciprocating lead screw 8. Four springs 26 are provided on both sides of the first T-shaped block 23;

[0063] One end of the four springs 26 abuts against the first T-shaped block 23, and the other end abuts against the inner wall of the moving frame 15.

[0064] In this embodiment, the first T-shaped block 23 is threadedly connected to the reciprocating lead screw 8. When the reciprocating lead screw 8 rotates, the first T-shaped block 23 can be moved. Since the first T-shaped block 23 is slidably connected in the adjustment groove 16, through the limitation of the adjustment groove 16, when the reciprocating lead screw 8 rotates, the first T-shaped block 23 can only slide horizontally for adjustment. The four springs 26 provided on the first T-shaped block 23 can, under the trend of their resilience, make the first T-shaped block 23 reset to the middle part of the adjustment groove 16 opened on the moving frame 15 to ensure the driving effect.

[0065] Please refer to Figure 11 , as a further solution of the present invention, the lifting mechanism includes a second T-shaped block 27 and a screw 28 threadedly connected to the second T-shaped block 27. The second T-shaped block 27 is vertically slidably connected in a vertical groove opened on the first T-shaped block 23, and the screw 28 is rotatably connected to the first T-shaped block 23;

[0066] The second T-shaped block 27 is horizontally slidably connected in the sliding frame 6. Both ends of the screw 28 are respectively connected with a first gear 29 and a second gear 30 through two one-way ratchets. The first gear 29 is in one-way rotational meshing with the second rack 18, and the second gear 30 is in one-way rotational meshing with the first rack 17.

[0067] In this embodiment, the rotational directions of the one-way ratchets of the first gear 29 and the second gear 30 are opposite. When the first T-shaped block 23 moves towards the first rack 17, the second gear 30 will mesh with the first rack 17. Driven by the movement of the first T-shaped block 23, the second gear 30 rotates meshing with the first rack 17. At this time, the one-way ratchet at the second gear 30 will not idle, so the screw 28 will rotate, causing the second T-shaped block 27 threadedly connected to the screw 28 to slide and adjust in the vertical groove opened on the first T-shaped block 23. When the first T-shaped block 23 moves from one end of the first rack 17 to one end of the second rack 18, the one-way ratchet at the second gear 30 will idle. At this time, the screw 28 will not rotate driven by the movement of the first T-shaped block 23. When the first gear 29 meshes with the second rack 18, the first gear 29 will rotate under the moving force of the first T-shaped block 23. At this time, the second T-shaped block 27 will be lifted and adjusted by the rotation of the screw 28. When the first gear 29 moves and adjusts from one end of the second rack 18 to one end of the first rack 17, the one-way ratchet at the first gear 29 will idle. At this time, the screw 28 will not rotate. Through the design of the first gear 29 and the second gear 30, when the first T-shaped block 23 moves and adjusts in the adjustment groove 16, the screw 28 can rotate forward and backward, so that the second T-shaped block 27 can be lifted and adjusted inside the vertical groove opened on the first T-shaped block 23 to meet the use requirements of linkage drive. The one-way ratchet is an existing publicly disclosed technical means and will not be elaborated too much here.

[0068] See also Figure 12 As a further solution of the present invention, the blocking assembly includes two second abutment blocks 31 respectively slidably connected to the slide groove 20 and a fixing plate 32 fixedly connected to the two second abutment blocks 31, and the fixing plate 32 is slidably connected to the lifting groove 19;

[0069] A movable groove 33 is provided on the fixed plate 32, and second through holes 34 are provided on the fixed plate 32 on both sides of the movable groove 33. The movable groove 33 is slidably connected to the reciprocating screw rod 8. The length dimension of the movable groove 33 is the two diameter dimensions of the reciprocating screw rod 8, and the second resistance block 31 is connected to the unlocking assembly.

[0070] In this embodiment, the fixed plate 32 is slidably placed on the plate 2 connected to the lifting groove 19. When the interfering inclined surface of the second interfering block 31 interferes with another corresponding inclined surface, an upward top contact force is applied to the second interfering block 31, so that the fixed plate 32 rises in the lifting groove 19. At this time, the top of the movable groove 33 will be away from the reciprocating screw rod 8, and the bottom of the movable groove 33 will interfere with the reciprocating screw rod 8, and the second through hole 34 opened on the fixed plate 32 will be aligned with the plug-in rod 25. When the second interfering block 31 is subjected to the interfering force, the fixed plate 32 will be blocked at the lifting groove 19. At this time, the second through hole 34 will be staggered with the plug-in rod 25, and the plug-in rod 25 cannot be slid and adjusted on the movable frame 15, thereby satisfying the positioning of the first T-block 23.

[0071] See also Figure 7 As a further solution of the present invention, the unlocking assembly includes two first abutting blocks 11 abutting against the second abutting blocks 31 and a connecting plate 12 fixedly connected to the two first abutting blocks 11, and the connecting plate 12 is mounted on the gantry 3;

[0072] A sleeve hole 13 is provided at the center of the connecting plate 12 , and the sleeve hole 13 is rotatably sleeved with the reciprocating screw rod 8 . The connecting plate 12 is fixedly connected to the gantry 3 , and first through holes 14 are provided on the connecting plate 12 on both sides of the sleeve hole 13 .

[0073] In this embodiment, when the moving frame 15 moves to one end of the sliding groove 7, the second contact block 31 will contact the first contact block 11, so the first contact block 11 applies an upward force to the second contact block 31, so that the fixed plate 32 rises in the lifting groove 19. At this time, the second through hole 34 is aligned with the sliding hole 22, and the plug-in rod 25 is aligned with the sliding hole 22 and the second through hole 34, which meets the linkage use. Through the matching design, the unlocking use of the blocking component is met.

[0074] See also Figure 6 , Figure 8, as a further solution of the present invention, the insertion rod 25 is slidably inserted into the insertion hole 10, the first through hole 14, the sliding hole 22 and the second through hole 34.

[0075] In this embodiment, after the fixing plate 32 is raised, the insertion rod 25 is aligned with the second through hole 34. At this time, the insertion rod 25 can be slidably inserted into the insertion hole 10, the first through hole 14, the sliding hole 22 and the second through hole 34. Under the continuous rotation of the reciprocating screw rod 8, the first T-shaped block 23 will slide in the adjustment groove 16. One end of the insertion rod 25 is inserted into the position of the first through hole 14. When the insertion rod 25 moves in the adjustment groove 16, the spring 26 on one side of the moving direction will be compressed and contracted and maintain a resilient force. When the reciprocating screw rod 8 rotates continuously, when the first T-shaped block 23 moves back and forth, the first T-shaped block 23 will move in the adjustment groove 16 in the reverse direction of the current position. At this time, the first T-shaped block 23 is reset in the adjustment groove 16 and maintains a centered position. At this time, the insertion rod 25 on the moving side will abut against the fixing plate 32. Since the second abutting block 31 on the fixing plate 32 on the moving side does not receive an upward abutting force, the fixing plate 32 will fall to the bottom in the lifting groove 19 under the action of gravity. The second through hole 34 on the fixing plate 32 will be misaligned with the insertion rod 25. Therefore, when the first T-shaped block 23 moves back and forth, the insertion rod 25 abuts against the fixing plate 32, forcing the moving frame 15 to slide and adjust inside the sliding groove 7 to meet the adjustment and use requirements. Through the design, after the detector 4 moves to one end of the gantry 3 during mobile detection, the detector 4 can be linked and adjusted to move back and forth after descending, and then linked and adjusted again to move after rising, which can meet the requirements of the detector 4 for detecting workpieces at multiple different positions. Through the comprehensive comparison of the detection data at multiple different positions, accidental deviations in the detection data can be eliminated.

[0076] A method for detecting the flatness of a flat panel using the flatness detection device as described above, comprising the following steps:

[0077] Step 1: Place the middle frame of the flat panel to be detected for flatness on the placement plate 2. Through the operation of the detection frame 1, the placement plate 2 is horizontally moved under the gantry 3 on the detection frame 1. Through the operation of the motor 9, the reciprocating screw rod 8 is driven to rotate, so that the threaded hole 24 threaded on the reciprocating screw rod 8 moves;

[0078] Step 2: When the first T-shaped block 23 moves, the moving frame 15 moves in the sliding groove 7 opened on the gantry 3. When the moving frame 15 moves to one end of the sliding groove 7, the first T-shaped block 23 is driven by the reciprocating screw rod 8 and moves a certain distance in the adjustment groove 16 opened on the moving frame 15;

[0079] Step 3: When the first T-shaped block 23 moves in the adjustment groove 16, the second T-shaped block 27 moves up and down on the first T-shaped block 23, and the second T-shaped block 27 drives the detector 4 to approach or move away from the placement plate 2;

[0080] Step 4: After the first T-shaped block 23 moves to one end in the adjustment groove 16, it moves back and forth along the spiral thread of the reciprocating lead screw 8, driving the detector 4 after lifting adjustment to move horizontally on the gantry 3;

[0081] Step 5: After the detector 4 moves to the other end of the gantry 3, the currently detected flat middle frame can be removed.

[0082] The above embodiments are exemplary rather than restrictive. Therefore, without departing from the spirit or basic characteristics of the present invention, all technical solutions that can implement the present invention in other specific forms are included in the present invention.

Claims

1. A flatness detection device, comprising a detection frame (1), a placement plate (2) which can be horizontally driven and arranged on the detection frame (1), and a gantry (3) fixed on the detection frame (1), characterized in that: The gantry (3) is provided with a lifting and lowering adjustment structure, and the lifting and lowering adjustment structure is provided with a detector (4); The lifting and lowering adjustment structure comprises a reciprocating screw (8) rotatably connected to the gantry (3), a motor (9) whose output shaft is coaxially fixed to one end of the reciprocating screw (8) and is installed on one side of the gantry (3), a sliding mechanism slidably arranged on the gantry (3) and slidably sleeved with the reciprocating screw (8), a translation mechanism arranged on the sliding mechanism and threadedly connected to the reciprocating screw (8), and a lifting mechanism arranged inside the translation mechanism and connected to the sliding mechanism, the detector (4) is slidably plugged into the sliding mechanism, and the detector (4) is connected to the lifting mechanism; When the motor (9) is in motion, it drives the reciprocating screw (8) to rotate on the gantry (3). During the rotation of the reciprocating screw (8), it drives the sliding mechanism to slide on the gantry (3). When the sliding mechanism moves to one end of the gantry (3), the translation mechanism slides inside the sliding mechanism under the drive of the reciprocating screw (8). During the movement of the translation mechanism, the lifting mechanism moves up and down. When the lifting mechanism is in motion, it drives the detector (4) to be raised and lowered on the sliding mechanism.

2. A flatness detection device according to claim 1, characterized in that: The back of the detector (4) is fixedly connected with a plug-in frame (5), and the inner circle of the plug-in frame (5) is fixedly connected with a sliding frame (6) on the detector (4); The gantry (3) is provided with a sliding groove (7), and the sliding mechanism is slidably arranged in the sliding groove (7); Insertion holes (10) are provided on the gantry (3) at both sides of the reciprocating screw rod (8), and unlocking components are provided at both ends of the gantry (3).

3. A flatness detection device according to claim 2, characterized in that: The sliding mechanism comprises a moving frame (15) slidably connected in the sliding groove (7) and two blocking components slidably connected to two sides of the moving frame (15), respectively, and the blocking components are connected to the unlocking component; Bosses are provided on both sides of the movable frame (15) for slidingly plugging with the plug-in frame (5); adjusting grooves (16) are provided on the upper and lower sides of the inner wall of the cavity of the movable frame (15); a first rack (17) is provided on the inner wall of one end of the adjusting groove (16) at the bottom; a second rack (18) is provided on the inner wall of the other end of the adjusting groove (16) at the top, staggered with the first rack (17); and lifting grooves (19) are provided on both sides of the movable frame (15); The movable frame (15) at the position of the lifting groove (19) is symmetrically provided with sliding grooves (20), the movable frame (15) between the two sliding grooves (20) is provided with a center hole (21) penetrating therethrough, the center hole (21) and the reciprocating screw rod (8) are slidably sleeved, and the movable frame (15) between the two center holes (21) is provided with a sliding hole (22).

4. A flatness detection device according to claim 1, characterized in that: The translation mechanism comprises a first T-shaped block (23) and four plug-in rods (25) fixedly connected to both sides of the first T-shaped block (23); the first T-shaped block (23) is slidably connected in the adjustment groove (16); A threaded hole (24) is provided at the center of the first T-shaped block (23), the threaded hole (24) is threadedly connected to the reciprocating screw rod (8), and four springs (26) are provided on both sides of the first T-shaped block (23); One end of the four springs (26) abuts against the first T-shaped block (23), and the other end abuts against the inner wall of the moving frame (15).

5. A flatness detection device according to claim 1, characterized in that: The lifting mechanism comprises a second T-shaped block (27) and a screw rod (28) threadedly connected to the second T-shaped block (27); the second T-shaped block (27) is vertically slidably connected to a vertical groove provided on the first T-shaped block (23); and the screw rod (28) is rotatably connected to the first T-shaped block (23); The second T-shaped block (27) is slidably connected in the sliding frame (6) in a transverse direction. The two ends of the screw rod (28) are respectively connected to a first gear (29) and a second gear (30) through two one-way ratchets. The first gear (29) is unidirectionally rotatably meshed with the second rack (18), and the second gear (30) is unidirectionally rotatably meshed with the first rack (17).

6. A flatness detection device according to claim 3, characterized in that: The blocking assembly comprises two second abutting blocks (31) respectively slidably connected in the slide groove (20) and a fixing plate (32) fixedly connected to the two second abutting blocks (31), wherein the fixing plate (32) is slidably connected in the lifting groove (19); The fixed plate (32) is provided with a movable groove (33), and the fixed plate (32) on both sides of the movable groove (33) is provided with second through holes (34), the movable groove (33) is slidably connected to the reciprocating screw (8), the length dimension of the movable groove (33) is the two diameter dimensions of the reciprocating screw (8), and the second abutment block (31) is connected to the unlocking assembly.

7. A flatness detection device according to claim 6, characterized in that: The unlocking assembly comprises two first contact blocks (11) contacting with the second contact blocks (31) and a connecting plate (12) fixedly connected to the two first contact blocks (11), wherein the connecting plate (12) is mounted on the gantry (3); A sleeve hole (13) is provided at the center of the connecting plate (12), the sleeve hole (13) is rotatably sleeved with the reciprocating screw rod (8), the connecting plate (12) is fixedly connected to the gantry (3), and first through holes (14) are provided on the connecting plate (12) at both sides of the sleeve hole (13).

8. A flatness detection device according to claim 4, characterized in that: The plug-in rod (25) is slidably plugged into the plug-in hole (10), the first through hole (14), the sliding hole (22) and the second through hole (34).

9. A method for detecting the visual flatness of a flat plate using the flatness detection device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Place the flat plate middle frame to be tested for flatness on the placement plate (2), operate the testing frame (1) to make the placement plate (2) move horizontally on the testing frame (1) below the gantry (3), and drive the reciprocating screw (8) to rotate by the operation of the motor (9), so that the threaded hole (24) threadedly connected to the reciprocating screw (8) moves; Step 2: When the first T-shaped block (23) moves, the moving frame (15) moves in the sliding groove (7) provided on the gantry (3); when the moving frame (15) moves to one end of the sliding groove (7), the first T-shaped block (23) moves a certain distance in the adjusting groove (16) provided on the moving frame (15) under the driving of the reciprocating screw rod (8); Step 3: When the first T-block (23) moves in the adjustment groove (16), the second T-block (27) is raised and lowered on the first T-block (23), and the second T-block (27) drives the detector (4) to move closer to or farther from the placement plate (2); Step 4: After the first T-shaped block (23) moves to one end in the adjustment slot (16), it moves back and forth along the spiral pattern of the reciprocating screw rod (8), driving the detector (4) after the lifting adjustment to move horizontally on the gantry (3); Step 5: After the detector (4) moves to the other end of the gantry (3), the middle frame of the tablet that has been tested can be removed.

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