Workpiece surface flatness detection device and detection method

Abstract

The invention discloses a workpiece surface flatness detection device and detection method, and belongs to the technical field of industrial automatic detection. The device comprises a rack, a detection mechanism and a first driving mechanism, wherein the detection mechanism comprises a suspension plate and a plurality of connecting plates which are arranged on the suspension plate and are annularly distributed, and a plurality of detectors are arranged on the connecting plates; the first driving mechanism comprises a second sleeve and a first sleeve which are sleeved inside and outside, and the second sleeve is connected with a second driving assembly which is used for driving the detection mechanism to ascend and descend; the first sleeve is connected with a first driving assembly used for driving the detection mechanism to rotate. A multi-point detection mode is adopted, so that the detection frequency can be reduced; and the detection coverage can be effectively expanded, so that the integrity of detection data is ensured. And meanwhile, the detection mechanism can rotate and ascend and descend to obtain more detection data at different positions, so that the flatness detection requirement with higher precision can be met.

Description

Technical Field

[0001] This invention belongs to the field of industrial automation testing technology, and more specifically, relates to a workpiece surface flatness testing device and testing method. Background Technology Flatness refers to the degree of deviation between a flat surface and an ideal surface. It is typically measured by the difference between different points on the surface of a workpiece to assess whether it is perfectly flat. In many industrial fields, especially machining, mold making, precision instrument manufacturing, and electronic component production, flatness control is crucial. If a component's surface is uneven, it can affect its assembly accuracy, operational stability, and lifespan. Therefore, flatness testing devices ensure that the surface of parts meets design requirements, thereby guaranteeing product quality. However, during the use of flatness testing devices, random deviations can occur in the test data, affecting the accuracy of the results.

[0002] To eliminate the interference of random deviations on the test results, the industry generally requires multiple tests, and the data from these multiple tests are compared to improve the accuracy of the test data. For example, patent CN120084253A discloses a flatness testing device and a method for visually testing the flatness of flat panels. This application, through the rational design of the structural combination and connection relationship of the lifting and adjusting structure, allows the testing instrument to perform multiple tests on the workpiece at different heights. By combining and comparing the data from these multiple tests, random deviations in the testing device can be eliminated, improving the accuracy of the flatness test results. However, this application uses single-point testing. To collect more test data, the workpiece or testing instrument needs to be moved frequently, making the testing process relatively cumbersome. In addition, the testing instrument in this application can only move in one horizontal direction and one vertical direction, resulting in limited coverage of the testing points and insufficient data integrity, thus failing to accurately reflect the flatness of the entire workpiece surface. Summary of the Invention

[0003] The problem to be solved In view of at least some of the problems existing in the prior art, the present invention proposes a workpiece surface flatness detection device, the purpose of which is to solve the problem that the existing flatness detection devices have a cumbersome detection process and limited detection point coverage, resulting in insufficient detection accuracy.

[0004] Technical solution To solve the above problems, the technical solution adopted by the present invention is as follows: The present invention provides a workpiece surface flatness detection device, comprising a frame, The testing mechanism is located above the rack. The detection mechanism includes a suspension plate and several connecting plates arranged in a ring on the suspension plate, and several detectors are provided on the connecting plates. And the first drive mechanism that drives the detection mechanism to rotate and move up and down. The first driving mechanism includes a second sleeve and a first sleeve arranged inner and outer, with the two sleeves slidingly engaged by a keyway in a vertical direction; wherein... The second sleeve is connected to the detection mechanism, and the second sleeve is connected to a second drive assembly for driving the second sleeve to move up and down, thereby driving the detection mechanism to move up and down. The first sleeve is connected to a first driving component, which drives the first sleeve to rotate, and then drives the detection mechanism to rotate through the second sleeve.

[0005] In some embodiments, the second drive assembly includes a drive shaft, a hollow threaded column, and a third sleeve, which are sequentially sleeved from the inside out; wherein, The third sleeve is mounted on the mounting frame of the detection mechanism. The hollow threaded column and the third sleeve are connected by a threaded drive. The bottom of the hollow threaded column extends out of the third sleeve and is rotatably connected to the second sleeve through the second bearing. The drive shaft and the hollow threaded column are fitted by a vertically arranged keyway, and the drive shaft is connected to a drive source to drive the drive shaft to rotate.

[0006] In some embodiments, the first drive assembly includes a first gear and a second gear that mesh with each other; wherein, The first sleeve is connected to the first gear, and the first gear is rotatably mounted on the third sleeve via a first bearing; the first gear is connected to a drive source.

[0007] In some embodiments, the bottom of the second sleeve is provided with a coupling, which is connected to the suspension plate via a universal joint; and the coupling is provided with an encoder.

[0008] In some embodiments, the suspension plate is further provided with a spring column, the length of which in its free state is greater than that of the detector.

[0009] In some embodiments, the suspension plate is provided with 4 plates, which are arranged in a cross shape. Each suspension plate is provided with 4 detectors and 2 spring columns.

[0010] In some embodiments, the frame includes a base plate and side plates disposed on both sides of the base plate, with a plurality of linearly arranged rollers between the two side plates, and the rollers being connected to a drive source via a chain.

[0011] In some embodiments, a second drive mechanism is provided at the bottom of the frame; The second driving mechanism includes a receiving plate and a plurality of support plates spaced apart on the receiving plate, the upper surfaces of the plurality of support plates forming a support plane. A synchronous lifting mechanism is provided between the receiving plate and the base plate, and the base plate is provided with a clearance opening for the support plate to pass through freely; driven by the synchronous lifting mechanism, the support plate passes through the gap between adjacent rollers to lift the workpiece to be tested.

[0012] In some embodiments, a base is provided below the receiving plate, and a rotating platform is provided between the base and the receiving plate, the rotating platform being connected to a drive source.

[0013] This invention also provides a detection method for a workpiece surface flatness detection device, characterized by comprising the following steps: S1. Divide the four suspension plates arranged in a cross shape into two directions; the detectors on the two suspension plates in the same direction are lateral detectors; the detectors on the two suspension plates in the other direction are lateral detectors. The surface flatness of a standard workpiece is tested using a testing instrument, and the calibration data between each transverse testing instrument and the standard workpiece are recorded as follows: The calibration data between each longitudinal inspection instrument and the standard workpiece are recorded as follows: Where m is the number of transverse detectors; n is the number of longitudinal detectors; S2. Use a testing instrument to test the surface flatness of the workpiece to be tested, and record the test data between each transverse testing instrument and the workpiece to be tested. The detection data between each longitudinal inspection instrument and the workpiece to be inspected are recorded as follows: ; S3. Compare the calibration data and test data of each detector, and find the two sets of data with the largest and smallest differences. For the transverse detector, the largest and smallest differences are C and D, respectively; that is, C = D= The maximum and minimum differences of the longitudinal inspection instrument are E and F, respectively; that is, E = F= ; S4. Calculate the lateral tilt angle of the workpiece to be measured. ; longitudinal tilt angle ;in, The distance between the detector corresponding to the maximum difference C and the detector corresponding to the minimum difference D; The distance between the detector corresponding to the maximum difference E and the distance between the minimum difference F; the horizontal and vertical tilt angles are compared with the standard parameters. If they exceed the standard error, the workpiece surface to be tested needs to be returned to the factory for secondary processing. S5. The detection mechanism rotates, and the rotation angle of the detection mechanism is obtained using an encoder. The circumferential tilt angle of the workpiece under test is obtained as follows: or, Where r is the distance from the detector to the center of the suspension plate. This is the calibration data for the transverse measuring instrument. For calibration The initial position of the corresponding transverse inspection instrument when inspecting the workpiece. For calibration The corresponding endpoint position of the transverse inspection instrument when inspecting the workpiece; For the calibration data of the longitudinal inspection instrument, For calibration The initial position of the corresponding longitudinal inspection instrument when inspecting the workpiece. For calibration The endpoint position of the corresponding longitudinal inspection instrument when inspecting the workpiece; Compare the circumferential tilt angle with the standard parameters to determine if it is within the standard error. If it exceeds the standard error, the workpiece needs to be returned to the factory for secondary processing.

[0014] Beneficial effects Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The workpiece surface flatness detection device of the present invention, through the ring-shaped distributed suspension plates, with multiple detectors on each suspension plate, can form a multi-point detection mode, which can not only reduce the number of detections, but also effectively expand the detection coverage area to ensure the integrity of the detection data and improve the detection accuracy. At the same time, the second sleeve and the first sleeve are slidably fitted by a vertical keyway, so that the rotation and lifting movements of the second sleeve do not interfere with each other, thereby realizing the rotation and lifting movement operation of the detection mechanism to obtain more detection data at different positions, thus adapting to the higher precision flatness detection requirements.

[0015] (2) The workpiece surface flatness detection device of the present invention, by setting the spring column, can reduce the contact pressure of the workpiece to be tested to prevent the surface of the workpiece to be tested from being scratched and causing minor deformation; on the other hand, the spring column also plays a certain role in shock absorption to reduce the interference of the test results caused by the vibration of the workpiece to be tested. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a workpiece surface flatness detection device according to the present invention; Figure 2 This is a schematic diagram showing the connection between the detection mechanism and the first driving mechanism in this invention; Figure 3 This is a schematic diagram of the detection mechanism in this invention; Figure 4 This is a schematic diagram of the structure of the first driving mechanism in this invention; Figure 5 This is a cross-sectional view of the first driving mechanism in this invention; Figure 6 This is a schematic diagram of the frame structure in this invention; Figure 7 This is a schematic diagram of the structure of the second driving mechanism in this invention; In the diagram: 100, frame; 110, base plate; 120, side plate; 130, roller; 140, chain; 200. Testing mechanism; 210. Suspension plate; 220. Connecting plate; 230. Testing instrument; 240. Spring column; 300, First drive mechanism; 310, Mounting bracket; 320, First sleeve; 330, Second sleeve; 340, Coupling; 350, Universal joint; 361, First gear; 362, Second gear; 363, First bearing; 371, Drive shaft; 372, Hollow threaded column; 373, Third sleeve; 374, Second bearing; 400. Second drive mechanism; 410. Receiving plate; 420. Support plate; 430. Synchronous lifting mechanism; 440. Base; 450. Rotary table; 500. The workpiece to be tested. Detailed Implementation

[0017] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0018] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] The present invention will be further described below with reference to specific embodiments.

[0020] like Figure 1As shown, this embodiment of a workpiece surface flatness detection device includes a frame 100, a detection mechanism 200, and a first drive mechanism 300. The frame 100 provides stable support for the workpiece 500 to be tested; the detection mechanism 200 is located above the frame 100 and is used to detect the surface flatness of the workpiece 500; the first drive mechanism 300 drives the detection mechanism 200 to rotate and move up and down to obtain more detection data from different locations.

[0021] refer to Figure 3 As shown, in one embodiment of the testing mechanism 200, the testing mechanism 200 includes a suspension plate 210 and a plurality of connecting plates 220 disposed on the suspension plate 210. The plurality of connecting plates 220 are arranged in a ring, and each connecting plate 220 is provided with a plurality of testing instruments 230 along its length. Compared to traditional single-point inspection, this embodiment adopts a multi-point inspection mode, which not only reduces the number of inspections but also effectively expands the inspection coverage to ensure the integrity of the inspection data and improves the inspection accuracy to meet the needs of higher precision flatness inspection.

[0022] Preferably, the suspension plates 210 are symmetrically distributed. This symmetrical distribution structure can effectively reduce the detection error caused by symmetrical fluctuations in the circumferential direction of the surface of the workpiece 500 to be tested.

[0023] In some embodiments, a spring post 240 is also provided on the suspension plate 210. Naturally, the length of the spring post 240 in its free state is greater than that of the detector 230. The spring post 240 serves two purposes: firstly, it reduces the contact pressure on the workpiece 500 to prevent scratches and minor deformations on its surface; secondly, it also provides some vibration damping to reduce interference with the detection results caused by vibrations of the workpiece 500.

[0024] Specifically, in this embodiment, there are 4 suspension plates 210 arranged in a cross shape. Each suspension plate 210 is equipped with 4 detectors 230 and 2 spring columns 240.

[0025] refer to Figure 2 , Figure 4 As shown, the first drive mechanism 300 includes a mounting bracket 310 and a second sleeve 330 and a first sleeve 320 arranged inner and outer respectively. The two sleeves are slidably fitted together by a keyway, and the sliding direction is vertical. That is to say, the second sleeve 330 and the first sleeve 320 rotate synchronously in the circumferential direction; but they can move relative to each other in the axial direction.

[0026] The detection mechanism 200 is connected to the second sleeve 330, and the second sleeve 330 is connected to a second drive assembly for driving the second sleeve 330 to move up and down, thereby driving the detection mechanism 200 to move up and down. At the same time, the first sleeve 320 is connected to a first drive assembly for driving the first sleeve 320 to rotate, thereby driving the detection mechanism 200 to rotate through the second sleeve 330.

[0027] As one embodiment of the first drive assembly, it includes a first gear 361 and a second gear 362 that mesh with each other; wherein the first gear 361 is connected to the first sleeve 320, and the second gear 362 is connected to a drive source.

[0028] During operation, the drive source drives the first sleeve 320 to rotate through the meshing transmission of the second gear 362 and the first gear 361; the first sleeve 320 drives the second sleeve 330 to rotate through the keyway engagement, thereby driving the detection mechanism 200 to rotate.

[0029] like Figure 5 As shown, one embodiment of the second drive assembly includes a drive shaft 371, a hollow threaded post 372, and a third sleeve 373, which are sequentially sleeved from the inside out. The top of the third sleeve 373 is fixedly mounted on the bottom of the mounting bracket 310. The first gear 361 is rotatably mounted on the third sleeve 373 via a first bearing 363, providing a mounting base for the entire first drive assembly without affecting the free rotation of the first gear 361.

[0030] The hollow threaded post 372 and the third sleeve 373 are connected by a threaded drive, and the bottom of the hollow threaded post 372 extends into the third sleeve 373, which is rotatably connected to the second sleeve 330 via the second bearing 374. The drive shaft 371 and the hollow threaded post 372 are connected by a vertically arranged keyway, and the top of the drive shaft 371 passes through the top plate of the mounting bracket 310 and is connected to a drive source to drive the drive shaft 371 to rotate.

[0031] The working principle of the second drive component in this embodiment is as follows: the drive source drives the drive shaft 371 to rotate, and the drive shaft 371 drives the hollow threaded column 372 to rotate through the keyway. At this time, since the hollow threaded column 372 and the third sleeve 373 are threadedly engaged, and the third sleeve 373 is fixed on the mounting bracket 310, the hollow threaded column 372 will move vertically, which will then drive the second sleeve 330 to rise and fall through the second bearing 374, so as to realize the lifting and lowering operation of the detection mechanism 200.

[0032] This embodiment of a workpiece surface flatness detection device optimizes the specific structure of the first driving mechanism 300 so that the first driving mechanism 300 can drive the detection mechanism 200 to rotate and lift without interfering with each other, so as to facilitate the acquisition of more detection data at different locations and ensure the accuracy of the detection structure.

[0033] In some embodiments, the bottom of the second sleeve 330 is provided with a coupling 340, which is connected to the suspension plate 210 via a universal joint 350. The universal joint 350 is provided to avoid the problem that the detection mechanism 200 cannot return to its original position due to tilting, thus ensuring that the spring column 240 can better fit the workpiece 500 to be tested.

[0034] Preferably, the connection between the universal joint 350 and the suspension plate 210 is located at the center of the suspension plate 210; and a plurality of suspension plates 210 are arranged in a ring around the center of the connecting plate 220.

[0035] Alternatively, an encoder (not shown in the figure) can be installed on the coupling 340 to detect the rotation angle of the detection mechanism 200.

[0036] like Figure 6 As shown, in one embodiment of the frame 100, the frame 100 includes a base plate 110 and side plates 120 disposed on both sides of the base plate 110. A plurality of rollers 130 arranged linearly are disposed between the two side plates 120, and the plurality of rollers 130 are connected to a drive source via a chain 140.

[0037] In this embodiment, the roller 130 not only supports the workpiece 500 to be tested, but also transports the workpiece 500 to be tested, so as to facilitate the adjustment of the position of the workpiece 500 to be tested, so that the workpiece 500 to be tested is located directly below the detection mechanism 200.

[0038] like Figure 1 , Figure 7 As shown, in some other embodiments, a second drive mechanism 400 is provided at the bottom of the frame 100. The second drive mechanism 400 includes a receiving plate 410 and a plurality of spaced support plates 420 disposed on the receiving plate 410, the upper surfaces of the plurality of support plates 420 forming a support plane.

[0039] Meanwhile, a synchronous lifting mechanism 430 is provided between the receiving plate 410 and the base plate 110, and the base plate 110 has a clearance opening for the support plate 420 to pass freely. Driven by the synchronous lifting mechanism 430, the support plate 420 passes through the gap between adjacent rollers 130 to lift the workpiece 500 to be tested. Compared with using rollers 130 to support the workpiece 500 to be tested, the support plane in this embodiment can provide a more stable support effect for the workpiece 500 to be tested.

[0040] In some embodiments, the surface of the workpiece 500 to be tested has some recessed structures such as process holes and grooves. If the first driving mechanism 300 directly drives the detection mechanism 200 to rotate, when the spring column 240 is stuck in the recessed structure, it will obstruct the movement of the first driving mechanism 300, which may easily cause damage to the first driving mechanism 300.

[0041] Therefore, in this embodiment, a base 440 is provided below the receiving plate 410, and a rotating table 450 is provided between the base 440 and the receiving plate 410. The rotating table 450 is connected to a drive source to drive the entire frame 100 to rotate.

[0042] During operation, the rotating table 450 can drive the frame 100 and the workpiece 500 to be tested to rotate. If a spring post 240 gets stuck in the recessed structure on the workpiece 500 during the rotation, the first drive mechanism 300 will be driven to rotate. At this time, the position of the workpiece 500 needs to be adjusted until the spring post 240 can avoid the corresponding recessed structure.

[0043] The following description uses four suspension plates 210 arranged in a cross shape as an example to illustrate the detection method of a workpiece surface flatness detection device according to this embodiment. For ease of description below, the detector 230 on two suspension plates 210 located in the same direction is defined as a transverse detector; the detector 230 on two suspension plates 210 located in another direction is defined as a longitudinal detector.

[0044] Before performing flatness testing on the workpiece 500, in order to avoid testing errors caused by equipment assembly and working environment, a standard workpiece needs to be tested first. The accumulated errors are then included in the testing data of the testing instrument 230, thereby achieving the effect of calibrating the testing benchmark.

[0045] The specific testing steps are as follows: The standard workpiece is conveyed to the area directly below the inspection mechanism 200 using roller 130; Start the synchronous lifting machine 430, which drives the support plate 420 to rise, and uses the support plane of the support plate 420 to lift the standard workpiece. The first drive assembly is activated, causing the detection mechanism 200 to descend to a suitable height, allowing the spring column 240 to contact the surface of the standard workpiece. At this time, the calibration data between each transverse detector and the standard workpiece are recorded as follows: The calibration data between each longitudinal inspection instrument and the standard workpiece are recorded as follows: Where m is the number of transverse detectors and n is the number of longitudinal detectors.

[0046] Next, the standard workpiece is replaced with the workpiece 500 to be inspected, and the above operation is repeated to obtain the inspection data between each transverse inspection instrument and the workpiece 500 to be inspected. The detection data between each longitudinal detector and the workpiece 500 are recorded as follows: .

[0047] Compare the calibration data and test data of each detector to find the two sets of data with the largest and smallest differences. For the transverse detector, the largest and smallest differences are C and D, respectively; that is, C = D= The maximum and minimum differences of the longitudinal inspection instrument are E and F, respectively; that is, E = F= .

[0048] The lateral tilt angle of the workpiece under test is obtained from the above. ; longitudinal tilt angle ;in, The distance between the detector 230 corresponding to the maximum difference C and the detector corresponding to the minimum difference D; The distance between the detector corresponding to the maximum difference E and the detector corresponding to the minimum difference F.

[0049] Compare the above horizontal and vertical tilt angles with the standard parameters to determine whether they are within the standard error. If they exceed the standard error, the workpiece surface to be tested needs to be returned to the factory for secondary processing.

[0050] Next, the second drive component is activated to rotate the detection mechanism (200), and the rotation angle of the detection mechanism (200) is obtained using an encoder. The circumferential tilt angle of the workpiece 500 is obtained as follows: or, Where r is the distance from the detector 230 to the center of the suspension plate 210. This is the calibration data for the transverse measuring instrument. For calibration The initial position of the corresponding transverse inspection instrument when inspecting workpiece 5. For calibration The corresponding endpoint position of the transverse inspection instrument when inspecting workpiece 5; This is the calibration data for the longitudinal measuring instrument. For calibration The initial position of the corresponding longitudinal inspection instrument when inspecting workpiece 5. For calibration The corresponding longitudinal inspection instrument is located at the endpoint of workpiece 5. Then, the above-mentioned circumferential tilt angle is compared with the standard parameters to determine whether it is within the standard error. If it exceeds the standard error, the workpiece needs to be returned to the factory for secondary processing of the surface of the workpiece 500.

[0051] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A workpiece surface flatness detection device, comprising a frame (100), characterized in that: It also includes, A detection mechanism (200) is located above the frame (100). The detection mechanism (200) includes a suspension plate (210) and a plurality of connecting plates (220) arranged in a ring on the suspension plate (210), and a plurality of detectors (230) are provided on the connecting plates (220). And a first drive mechanism (300) that drives the detection mechanism (200) to rotate and move up and down. The first driving mechanism (300) includes a second sleeve (330) and a first sleeve (320) arranged inner and outer, with the two sleeves slidingly engaged by a keyway in a vertical direction; wherein, The second sleeve (330) is connected to the detection mechanism (200), and the second sleeve (330) is connected to a second drive assembly for driving the second sleeve (330) to move up and down, so as to drive the detection mechanism (200) to move up and down. The first sleeve (320) is connected to a first driving component, which drives the first sleeve (320) to rotate, and then drives the detection mechanism (200) to rotate through the second sleeve (330).

2. The workpiece surface flatness detection device according to claim 1, characterized in that: The second drive assembly includes a drive shaft (371), a hollow threaded column (372), and a third sleeve (373) sequentially arranged from the inside out; wherein, The third sleeve (373) is mounted on the mounting bracket (310) of the detection mechanism (200). The hollow threaded column (372) and the third sleeve (373) are threadedly driven together. The bottom of the hollow threaded column (372) extends out to form the third sleeve (373), and is rotatably connected to the second sleeve (330) through the second bearing (374). The drive shaft (371) and the hollow threaded column (372) are fitted by a vertically arranged keyway, and the drive shaft (371) is connected to a drive source to drive the drive shaft (371) to rotate.

3. The workpiece surface flatness detection device according to claim 2, characterized in that: The first drive assembly includes a first gear (361) and a second gear (362) that mesh with each other; wherein, The first sleeve (320) is connected to the first gear (361), and the first gear (361) is rotatably mounted on the third sleeve (373) through the first bearing (363); the first gear (361) is connected to a drive source.

4. The workpiece surface flatness detection device according to claim 1, characterized in that: The bottom of the second sleeve (330) is provided with a coupling (340), which is connected to the suspension plate (210) via a universal joint (350); and the coupling (340) is provided with an encoder.

5. The workpiece surface flatness detection device according to claim 4, characterized in that: The suspension plate (210) is also provided with a spring column (240), and the length of the spring column (240) in its free state is greater than that of the detector (230).

6. The workpiece surface flatness detection device according to claim 5, characterized in that: The suspension plate (210) is provided with 4 plates, which are arranged in a cross shape. Each suspension plate (210) is provided with 4 detectors (230) and 2 spring columns (240).

7. A workpiece surface flatness detection device according to any one of claims 1-6, characterized in that: The frame (100) includes a base plate (110) and side plates (120) arranged on both sides of the base plate (110). A number of rollers (130) arranged in a linear pattern are provided between the two side plates (120), and the rollers (130) are connected to a drive source by a chain (140).

8. The workpiece surface flatness detection device according to claim 7, characterized in that: The bottom of the frame (100) is provided with a second drive mechanism (400). The second driving mechanism (400) includes a receiving plate (410) and a plurality of spaced support plates (420) disposed on the receiving plate (410), the upper surfaces of the plurality of support plates (420) forming a support plane; A synchronous lifting mechanism (430) is provided between the receiving plate (410) and the base plate (110), and the base plate (110) is provided with a clearance opening for the support plate (420) to pass through freely; under the drive of the synchronous lifting mechanism (430), the support plate (420) passes through the gap between adjacent rollers (130) to lift the workpiece (500) to be tested.

9. The workpiece surface flatness detection device according to claim 8, characterized in that: A base (440) is provided below the receiving plate (410), and a rotating platform (450) is provided between the base (440) and the receiving plate (410). The rotating platform (450) is connected to a drive source.

10. The detection method of the workpiece surface flatness detection device according to any one of claims 1-9, characterized in that: Includes the following steps, S1. Divide the four cross-shaped hanging plates (210) into two directions; among them, the detectors (230) on the two hanging plates (210) in the same direction are horizontal detectors; the detectors (230) on the two hanging plates (210) in the other direction are horizontal detectors. The surface flatness of the standard workpiece is tested using a testing instrument (230), and the calibration data between each transverse testing instrument and the standard workpiece are recorded as follows: The calibration data between each longitudinal inspection instrument and the standard workpiece are recorded as follows: Where m is the number of transverse detectors; n is the number of longitudinal detectors; S2. The surface flatness of the workpiece (500) is tested using a testing instrument (230), and the test data between each transverse testing instrument and the workpiece (500) are recorded as follows: The detection data between each longitudinal detector and the workpiece (500) are recorded as follows: ; S3. Compare the calibration data and test data of each detector, and find the two sets of data with the largest and smallest differences. For the transverse detector, the largest and smallest differences are C and D, respectively; that is, C = D= The maximum and minimum differences of the longitudinal inspection instrument are E and F, respectively; that is, E = F= ; S4. Calculate the lateral tilt angle of the workpiece (500) to be measured. ; longitudinal tilt angle ;in, The distance between the detector (230) corresponding to the maximum difference C and the detector (230) corresponding to the minimum difference D; The distance between the detector corresponding to the maximum difference E and the (230) corresponding to the minimum difference F is given; the horizontal and vertical tilt angles are compared with the standard parameters. If they exceed the standard error, the workpiece surface to be tested needs to be returned to the factory for secondary processing. S5. The detection mechanism (200) rotates, and the rotation angle of the detection mechanism (200) is obtained by the encoder. The circumferential tilt angle of the workpiece (500) was obtained as follows. or, Where r is the distance from the detector (230) to the center of the suspension plate (210), This is the calibration data for the transverse measuring instrument. For calibration The initial position of the corresponding transverse inspection instrument when inspecting workpiece (5), For calibration The corresponding end position of the transverse inspection instrument when inspecting workpiece (5); For the calibration data of the longitudinal inspection instrument, For calibration The initial position of the corresponding longitudinal inspection instrument when inspecting workpiece (5), For calibration The corresponding longitudinal inspection instrument at the end point when inspecting workpiece (5); Compare the circumferential tilt angle with the standard parameters to determine whether it is within the standard error. If it exceeds the standard error, the workpiece (500) needs to be returned to the factory for secondary processing.

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