A multi-station collaborative detection device for the surface quality of automobile panels

Abstract

The invention relates to the technical field of detection devices, and proposes a multi-station collaborative detection device for the surface quality of automobile covering parts, which can realize multi-station collaborative detection operations of sheet metal parts. During the detection process, the thickness detection of a certain detection point is not formed separately, but a comparison between the detection values ​​of multiple detection points is directly formed to form a detection of the deviation of the relative thickness between multiple detection points on the sheet metal part, so as to achieve the detection of the overall thickness uniformity of the sheet metal part. The device comprises a measuring component, a main structure and four auxiliary iron parts. The measuring component comprises two external frames and two internal frames. The bottom ends of the two external frames and the bottom ends of the two internal frames are provided with spherical grooves, and contact balls are arranged in the four spherical grooves. The two external frames and the two internal frames are slidably connected with lifting frames, and the four lifting frames are fixedly connected with elastic springs. The four elastic springs are respectively fixedly connected to the two internal frames and the two external frames.

Description

Technical Field

[0001] The invention relates to the technical field of detection devices, and in particular to a multi-station coordinated detection device for the surface quality of automobile covering parts. Background Art

[0002] As we all know, automobile covering parts refer to the parts that cover the engine, chassis, or the surface or interior of the cab and body. According to their functions and positions, they can be divided into three categories: external covering parts, internal covering parts and frame covering parts. Most of the automobile covering parts are sheet metal parts. A multi-station collaborative detection device for the surface quality of automobile covering parts is a device used for sheet metal quality detection.

[0003] After searching, the Chinese patent publication number CN115752212A discloses a vehicle automatic detection device for mechanical design and manufacturing, which is roughly described as comprising a plurality of support columns fixedly connected to the ground, the plurality of support columns are arranged far away from each other, the ends of the plurality of support columns away from the ground are commonly fixedly connected to a top seat, a hydraulic cylinder is fixedly connected to a side wall of the top seat away from the ground, a hydraulic column is arranged on the end of the hydraulic cylinder close to the top seat, the end of the hydraulic column away from the hydraulic cylinder penetrates the top seat, the end of the hydraulic column away from the hydraulic cylinder is fixedly connected to a rotating motor, the end of the rotating motor away from the hydraulic column is provided with a rotating shaft, and the end of the rotating shaft close to the ground is fixedly connected to a workbench. When in use, it can automatically detect whether the vehicle sheet metal is too high, too low, too long, too short, or too wide or too narrow. At the same time, we also searched for the Chinese patent publication number CN205981082 U's patent discloses a crankshaft connecting rod neck width detection device, which is roughly described as including a bottom bracket, an axial servo slide is provided on the bottom bracket, a radial servo slide is arranged on the axial servo slide, a probe base is installed on the radial servo slide, a measuring component is installed on the probe base, and the position can be adjusted up and down before detection, a drag chain sheet metal is arranged on one side of the axial servo slide and the radial servo slide, one end of the wiring drag chain is fixed on the drag chain sheet metal, and the other end is fixed on the drag chain fixed sheet metal, the measuring component includes a U-shaped bracket, an inductive probe and a measuring tip, two inductive probes are respectively installed on both sides of the U-shaped bracket, the measuring tip is arranged inside the U-shaped bracket, the front end of the measuring tip contacts the end face of the connecting rod neck, and the rear end presses the inductive probe, it adopts automated detection, which greatly improves the detection speed and accuracy of the keyway, and adopts online detection method, with functions such as autonomous perception and quality statistics.

[0004] Although the above two existing technical solutions can realize their respective corresponding detection work, it is considered that most sheet metal parts are realized through a series of sheet metal processing, and the thickness of the sheet metal will inevitably change during the punching process. When the thickness of the sheet metal is reduced to an extremely thin state due to the influence of the sheet metal processing, the sheet metal will break. Therefore, it is very necessary to detect the thickness of the sheet metal after the sheet metal operation. As for the thickness detection of sheet metal parts, the above technical solutions are more difficult to achieve, and the detection correspondence and matching need to be further improved. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a multi-station collaborative detection device for the surface quality of automobile covering parts, which can realize multi-station collaborative detection operations of sheet metal parts. During the detection process, the thickness detection of a certain detection point is not formed separately, but a comparison between the detection values ​​of multiple detection points is directly formed to form a detection of the deviation of the relative thickness between multiple detection points on the sheet metal part, thereby achieving the detection of the overall thickness uniformity of the sheet metal part.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-station collaborative detection device for the surface quality of an automobile cover, comprising a measuring component, a main structure and four auxiliary iron parts, the measuring component comprising two external frames and two internal frames, the bottom ends of the two external frames and the bottom ends of the two internal frames are provided with spherical grooves, the four spherical grooves are provided with contact balls, the two external frames and the two internal frames are slidably connected with lifting frames, the four lifting frames are fixedly connected with elastic springs, the four elastic springs are respectively fixedly connected to the two internal frames and the two external frames, and the four lifting frames are provided with contact balls. An electromagnet group is installed, and the four electromagnet groups are matched with the four auxiliary iron parts respectively. The main structure includes a rotating column frame, and the rotating column frame is rotatably connected with an inner cross frame and an outer cross frame, the inner cross frame is rotatably connected with two inner side rods, and the two inner side rods are respectively connected with two inner vertical frames, and the outer cross frame is rotatably connected with two outer side rods, and the two outer rods are respectively connected with two outer vertical frames, and the rotating column frame is installed with a structural adjustment component for adjusting the two inner side rods and the two outer rods, and the inner cross frame and the outer cross frame are both connected with a reading component, and the two ends of the two reading components are respectively connected with the four lifting frames.

[0007] Preferably, the structural adjustment component includes a threaded rod, an internal threaded sleeve and an external threaded sleeve, the threaded rod is fixedly connected to the bottom end of the rotating column frame, the internal threaded sleeve and the external threaded sleeve are both threadedly connected to the threaded rod, the internal threaded sleeve and the external threaded sleeve are both rotatably connected to an internal synchronous drive frame and an external synchronous drive frame, two inner connecting rods are hinged on the internal synchronous drive frame, the two inner connecting rods are respectively hinged to the two inner side rods, and two outer connecting rods are respectively hinged to the two outer side rods.

[0008] Preferably, the reading component includes two sliding bars, the inner cross frame and the outer cross frame are both provided with sliding holes and outer bar grooves, the two sliding bars are respectively slidably connected in the sliding holes, and grating scales are installed in the two outer bar grooves. The two sliding bars are respectively connected to the moving detection ends of the two grating scales, and both ends of the two sliding bars are fixedly connected with linkage ropes, and the four linkage ropes are respectively fixedly connected to the four lifting frames.

[0009] Preferably, the two outer side rods and the two inner side rods are each provided with a guide opening, and the four linkage ropes pass through the four guide openings respectively.

[0010] Preferably, the four lifting frames are each provided with a plurality of side openings, the four electromagnet groups each include a plurality of conductor posts and a plurality of spiral wires, the plurality of conductor posts are respectively located in the plurality of side openings, and the plurality of spiral wires are respectively wound around the plurality of conductor posts.

[0011] Preferably, a stepped closing cover plate is provided in each of the plurality of side openings.

[0012] Preferably, the top ends of the two inner frames and the top ends of the two outer frames are fixedly connected with a group of connecting pressure plates, the four groups of connecting pressure plates are matched with a first pressing frame and a second pressing frame, the four first pressing frames are respectively connected to the four second pressing frames by a plurality of assembly bolts, and the connecting pressure plates are provided with through holes for the assembly bolts to pass through, the two inner side rods and the two outer side rods are fixedly connected with a first connecting shaft and a second connecting shaft, the four first pressing frames are provided with a first semicircular groove, and the four first semicircular grooves are respectively matched with the four first connecting shafts, and the four second pressing frames are provided with a second semicircular groove, and the four second semicircular grooves are respectively matched with the four second connecting shafts.

[0013] Preferably, the outer cross frame is provided with angle scale lines, and the inner cross frame is fixedly connected with an angle guide head, and the angle guide head matches the angle scale lines.

[0014] Preferably, a hand-held ring is fixedly connected to the top end of the rotating column frame, and a plurality of switch keys are installed at the bottom end of the hand-held ring.

[0015] Preferably, the bottom end of the threaded rod is fixedly connected to a limiting end plate.

[0016] Compared with the prior art, the present invention provides a multi-station collaborative detection device for the surface quality of automobile covering parts, which has the following beneficial effects:

[0017] (1) In the present invention, a functional component for four-point detection is formed through the design of the measuring component and the coordination of the measuring component with the auxiliary iron piece, which can realize the corresponding detection operation of the four detection points of the sheet metal part.

[0018] (2) In the present invention, the main structure is provided to form the installation of the measuring assembly, so that the two inner frames and the two outer frames in the measuring assembly are relatively installed to facilitate the adjustment of the relative positions of the two inner frames and the two outer frames.

[0019] (3) In the present invention, the multi-station collaborative detection of sheet metal parts is realized by designing a reading component in cooperation with a measuring component. During the detection process, the thickness of a certain detection point is not detected separately, but a comparison between the detection values ​​of multiple detection points is directly formed to clearly detect the deviation of the relative thickness between multiple detection points on the sheet metal part, thereby achieving the detection of the uniformity of the overall thickness of the sheet metal part.

[0020] (4) In the present invention, a driving structure that is adjusted correspondingly to the main structure is formed by equipping the structural adjustment component, so as to facilitate the corresponding adjustment of the main structure, thereby achieving detection matching alignment of the two inner frames and the two outer frames relative to the sheet metal parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the outer frame, the inner frame and the contact ball of the present invention;

[0023] Figure 3 It is a schematic diagram of a partially cutaway three-dimensional structure of the present invention;

[0024] Figure 4 For the present invention Figure 3 A schematic diagram of the local enlarged structure at point A in the middle;

[0025] Figure 5 For the present invention Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0026] Figure 6 It is a schematic diagram of an exploded three-dimensional structure of the connection pressing plate, the first pressing connecting frame and the second pressing connecting frame of the present invention;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the external frame and the connecting pressure plate of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the outer cross frame of the present invention;

[0029] Fig. 9It is a schematic diagram of the three-dimensional structure of the lifting frame and the linkage rope connected to the present invention;

[0030] Fig.10 It is a three-dimensional structural schematic diagram of the present invention relative to a sheet metal part detection operation;

[0031] Fig.11 It is a schematic diagram of the three-dimensional structure of the present invention when viewed from above relative to a sheet metal part inspection operation.

[0032] In the figure: 1, auxiliary iron parts; 2, outer frame; 3, inner frame; 4, contact ball; 5, lifting frame; 6, elastic spring; 7, rotating column frame; 8, inner cross frame; 9, outer cross frame; 10, inner side rod; 11, outer side rod; 12, threaded rod; 13, inner thread sleeve; 14, outer thread sleeve; 15, inner synchronous drive frame; 16, outer synchronous drive frame; 17, inner connecting rod; 18, outer connecting rod; 19, sliding bar; 20, sliding hole; 21, outer bar groove; 2 2. Grating ruler; 23. Linkage rope; 24. Guide port; 25. Side opening; 26. Conductor column; 27. Spiral line; 28. Stepped closed cover plate; 29. ​​Connecting pressure plate; 30. First pressure connecting frame; 31. Second pressure connecting frame; 32. Assembly bolt; 33. First connecting shaft; 34. Second connecting shaft; 35. First semicircular groove; 36. Second semicircular groove; 37. Angle scale line; 38. Angle guide head; 39. Hand-held ring; 40. Limit end plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0034] See also Figure 1-Figure 11A multi-station collaborative detection device for the surface quality of an automobile cover comprises a measuring component, a main structure and four auxiliary iron pieces 1, the measuring component comprises two external frames 2 and two internal frames 3, spherical grooves are provided at the bottom ends of the two external frames 2 and the bottom ends of the two internal frames 3, contact balls 4 are provided in the four spherical grooves, lifting frames 5 are slidably connected to the two external frames 2 and the two internal frames 3, elastic springs 6 are fixedly connected to the four lifting frames 5, the four elastic springs 6 are respectively fixedly connected to the two internal frames 3 and the two external frames 2, electromagnet groups are installed in the four lifting frames 5, and the four electromagnet groups are matched with the four auxiliary iron pieces 1 respectively. Through the design of the measuring component and the coordination of the measuring component and the auxiliary iron piece 1, a functional component for four-point detection is formed, which can realize the corresponding detection operation of the four detection points of the sheet metal part, and the four Each lifting frame 5 is provided with a plurality of side openings 25, and each of the four electromagnet groups includes a plurality of conductor posts 26 and a plurality of spiral wires 27. The plurality of conductor posts 26 are respectively located in the plurality of side openings 25, and the plurality of spiral wires 27 are respectively wound around the plurality of conductor posts 26. The specific contents of the electromagnet group are introduced to clarify the specific structure of the electromagnet group. A stepped closed cover plate 28 is provided in each of the plurality of side openings 25 to protect the overall structure formed by the spiral wires 27 and the conductor posts 26 in the side openings 25. The main structure includes a rotating column frame 7, and the rotating column frame 7 is rotatably connected to an inner cross frame 8 and an outer cross frame 9, and an angle scale line 37 is provided on the outer cross frame 9, and an angle guide head 38 is fixedly connected to the inner cross frame 8, and the angle guide head 38 matches the angle scale line 37, so as to facilitate the measurement and determination of the relative angle between the outer cross frame 9 and the inner cross frame 8.

[0035] It should be further explained that the inner cross frame 8 is rotatably connected to two inner side bars 10, and the two inner side bars 10 are respectively connected to the two inner vertical frames 3, and the outer cross frame 9 is rotatably connected to two outer side bars 11, and the two outer side bars 11 are respectively connected to the two outer vertical frames 2. The top ends of the two inner vertical frames 3 and the top ends of the two outer vertical frames 2 are fixedly connected to a set of connecting pressure plates 29, and the four sets of connecting pressure plates 29 are all equipped with a first pressing frame 30 and a second pressing frame 31, and the four first pressing frames 30 are respectively connected to the four second pressing frames 31 by a plurality of assembly bolts 3 2 connection, a through hole for the assembly bolt 32 to pass through is opened on the connecting plate 29, the two inner side rods 10 and the two outer side rods 11 are fixedly connected with the first connecting shaft 33 and the second connecting shaft 34, the four first pressing connecting frames 30 are each provided with a first semicircular groove 35, and the four first semicircular grooves 35 are respectively matched with the four first connecting shafts 33, and the four second pressing connecting frames 31 are each provided with a second semicircular groove 36, and the four second semicircular grooves 36 are respectively matched with the four second connecting shafts 34. Through the configuration of the main structure, the installation of the measuring assembly is formed, so that the measuring The two inner frames 3 and the two outer frames 2 in the assembly are relatively installed to facilitate the adjustment of the relative positions between the two inner frames 3 and the two outer frames 2. The rotating column frame 7 is installed with a structural adjustment component for adjusting the two inner side rods 10 and the two outer side rods 11. The structural adjustment component includes a threaded rod 12, an internal threaded sleeve 13 and an external threaded sleeve 14. The threaded rod 12 is fixedly connected to the bottom end of the rotating column frame 7. The internal threaded sleeve 13 and the external threaded sleeve 14 are both threadedly connected to the threaded rod 12. The internal threaded sleeve 13 and the external threaded sleeve 14 are both rotating. An inner synchronous drive frame 15 and an outer synchronous drive frame 16 are dynamically connected. Two inner connecting rods 17 are hinged on the inner synchronous drive frame 15. The two inner connecting rods 17 are respectively hinged to the two inner side rods 10. Two outer connecting rods 18 are hinged on the outer synchronous drive frame 16. The two outer connecting rods 18 are respectively hinged to the two outer side rods 11. Through the configuration of the structural adjustment component, a driving structure that is adjusted correspondingly to the main structure is formed to facilitate the corresponding adjustment of the main structure, thereby achieving the detection, matching and alignment of the two inner frames 3 and the two outer frames 2 relative to the sheet metal parts.

[0036] It should be further explained that the inner cross frame 8 and the outer cross frame 9 are both connected with a reading component, and the two ends of the two reading components are respectively connected to the four lifting frames 5. The reading component includes two sliding bars 19. The inner cross frame 8 and the outer cross frame 9 are both provided with sliding holes 20 and outer bar grooves 21. The two sliding bars 19 are respectively slidably connected in the sliding holes 20. Grating rulers 22 are installed in the two outer bar grooves 21. The two sliding bars 19 are respectively connected to the moving detection ends of the two grating rulers 22. Both ends of the two sliding bars 19 are fixedly connected with linkage ropes 23. The four linkage ropes 23 are respectively fixedly connected to the four lifting frames 5. The two outer side rods 11 and the two inner side rods 10 are each provided with a guide opening 24. The four linkage ropes 23 respectively pass through the four guide openings 24. Through the design of the reading component, the matching The combined measuring component can realize multi-station collaborative inspection of sheet metal parts. During the inspection process, the thickness of a certain inspection point is not detected separately, but the comparison between the inspection values ​​of multiple inspection points is directly formed to clearly detect the deviation of the relative thickness between multiple inspection points on the sheet metal part, thereby achieving the inspection of the overall thickness uniformity of the sheet metal part. The top of the rotating column frame 7 is fixedly connected to a hand-held ring 39, and a plurality of switch keys are installed at the bottom end of the hand-held ring 39. By connecting the plurality of switch keys to the control circuit of the spiral wire 27 and the control circuit of the grating ruler 22, the control of the electromagnetic field of the electromagnet group and the opening and closing operation of the grating ruler 22 can be controlled by the corresponding switch keys. The bottom end of the threaded rod 12 is fixedly connected to a limiting end plate 40 to form a rotation limit for the external threaded sleeve 14.

[0037] The switch key and grating scale 22 in this embodiment are conventional devices purchased on the market and known to technicians in this field, and can also be matched and customized according to actual needs. In the present invention, we only use them and do not improve their structure and function. For technicians in this field, their setting method, installation method and electrical connection method only need to be debugged according to the requirements of their instruction manual, and they will not be described in detail here.

[0038] To sum up, the working principle of the multi-station collaborative detection device for the surface quality of automobile covering parts is as follows: when in use, first carry the multi-station collaborative detection device for the surface quality of automobile covering parts to the place where it is required to be used, and install a power supply for the spiral wire 27 and the grating ruler 22, and place the sheet metal parts to be detected in a suspended manner. To improve the detection accuracy, corresponding clamping operations are performed by external auxiliary devices when necessary to improve the relative position stability of the sheet metal parts. During detection, the outer cross frame 9 is rotated and adjusted relative to the inner cross frame 8, and the inner threaded sleeve 13 and the outer threaded sleeve 14 are adjusted by rotating in combination. Under the transmission action of the inner synchronous drive frame 15 and the two inner connecting rods 17, and the transmission action of the outer synchronous drive frame 16 and the two outer connecting rods 18, the relative opening degree between the two outer side rods 11 and the relative opening degree between the two inner side rods 10 are adjusted, so that the four contact balls 4 can fit on the sheet metal parts to be detected. At the corresponding detection point, the power supply of the grating ruler 22 is then turned on, so that the grating ruler 22 forms a detection of the corresponding reading and marks the reading as the zero point. Then, the current of the multiple spiral wires 27 is turned on, so that the multiple spiral wires 27 are energized and cooperate with the multiple conductor columns 26 to form an electromagnetic field. The auxiliary iron piece 1 is placed at the lower part of the sheet metal according to the position of the electromagnetic field. Under the magnetic force of the electromagnetic field, the auxiliary iron piece 1 is adsorbed under the sheet metal. Due to the different thicknesses of the sheet metal, the electromagnetic field located above the sheet metal has different penetration effects relative to the sheet metal. Therefore, the magnetic field attraction intensity for the auxiliary iron piece 1 is different. Therefore, under the premise that the specifications of the four auxiliary iron pieces 1 are the same, the four auxiliary iron pieces 1 react on the corresponding lifting frame 5 with different downward pulling forces. The different downward pulling forces also have different stretching degrees for the corresponding elastic springs 6, thereby realizing the movement of the position of the sliding bar 19 in the sliding hole 20, and finally forming a reading change of the grating ruler 22.

[0039] Furthermore, by comparing the changed reading of the grating ruler 22 with the reading marked as zero on the grating ruler 22, the thickness deviation detection at the two positions where the contact balls 4 in the two inner frames 3 are respectively in contact can be realized, and the thickness deviation detection at the two positions where the contact balls 4 in the two outer frames 2 are respectively in contact can also be realized, so as to form a detection of the deviation of the relative thickness between multiple detection points on the sheet metal part, thereby achieving the detection of the overall thickness uniformity of the sheet metal part. Rotational damping is provided between the first pressing frame 30 and the second pressing frame 31 in contact with the inner side rod 10 and the inner side rod 10, and rotational damping is provided between the first pressing frame 30 and the second pressing frame 31 in contact with the outer side rod 11 and the inner side rod 10. Therefore, during the above-mentioned operation, the four contact balls 4 are fitted on When the sheet metal parts need to be inspected, the relative angle between the inner frame 3 and the inner side bar 10 can be in a relatively stable state, and the relative angle between the outer frame 2 and the outer side bar 11 can be in a relatively stable state. When it is necessary to adjust the angle between the inner frame 3 and the inner side bar 10 and the angle between the inner frame 3 and the inner side bar 10, manual auxiliary force is required. With the development of the automobile industry and the characteristics of iron materials, in order to improve the quality of automobiles, the application of sheet metal parts formed by iron materials is becoming less and less, and more materials will be selected from alloy materials such as aluminum and carbon steel, and these materials have smaller effects relative to electromagnetics. Therefore, the use of the multi-station collaborative detection device for the surface quality of automobile covering parts is less affected by the material characteristics of the corresponding sheet metal parts to be inspected, and can meet the formation of the required inspection.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-station collaborative detection device for the surface quality of automobile panels, comprising a measuring component, characterized in that: It also includes a main structure and four auxiliary iron parts (1), the measuring assembly includes two external frames (2) and two internal frames (3), the bottom ends of the two external frames (2) and the bottom ends of the two internal frames (3) are each provided with a spherical groove, the four spherical grooves are each provided with a contact ball (4), the two external frames (2) and the two internal frames (3) are each slidably connected with a lifting frame (5), the four lifting frames (5) are each fixedly connected with an elastic spring (6), the four elastic springs (6) are respectively fixedly connected to the two internal frames (3) and the two external frames (2), the four lifting frames (5) are each provided with an electromagnet group, the four electromagnet groups are respectively matched with the four auxiliary iron parts (1), The main structure comprises a rotating column frame (7), the rotating column frame (7) is rotatably connected to an inner cross frame (8) and an outer cross frame (9), the inner cross frame (8) is rotatably connected to two inner side bars (10), the two inner side bars (10) are respectively connected to two inner vertical frames (3), the outer cross frame (9) is rotatably connected to two outer side bars (11), the two outer side bars (11) are respectively connected to two outer vertical frames (2), the rotating column frame (7) is equipped with a structural adjustment component for adjusting the two inner side bars (10) and the two outer side bars (11), the inner cross frame (8) and the outer cross frame (9) are both connected to a reading component, and the two ends of the two reading components are respectively connected to the four lifting frames (5); The structural adjustment component comprises a threaded rod (12), an internal threaded sleeve (13) and an external threaded sleeve (14); the threaded rod (12) is fixedly connected to the bottom end of the rotating column frame (7); the internal threaded sleeve (13) and the external threaded sleeve (14) are both threadedly connected to the threaded rod (12); the internal threaded sleeve (13) and the external threaded sleeve (14) are both rotatably connected to an internal synchronous drive frame (15) and an external synchronous drive frame (16); two internal connecting rods (17) are hingedly connected to the internal synchronous drive frame (15); the two internal connecting rods (17) are respectively hingedly connected to the two internal side rods (10); and two external connecting rods (18) are respectively hingedly connected to the two external side rods (11); The reading component comprises two sliding bars (19), the inner cross frame (8) and the outer cross frame (9) are both provided with sliding holes (20) and outer bar grooves (21), the two sliding bars (19) are respectively slidably connected in the sliding holes (20), the two outer bar grooves (21) are both provided with grating rulers (22), the two sliding bars (19) are respectively connected to the moving detection ends of the two grating rulers (22), the two ends of the two sliding bars (19) are both fixedly connected to linkage ropes (23), and the four linkage ropes (23) are respectively fixedly connected to the four lifting frames (5).

2. The multi-station collaborative detection device for the surface quality of automobile panels according to claim 1 is characterized in that: The two outer side bars (11) and the two inner side bars (10) are each provided with a guide opening (24), and the four linkage ropes (23) pass through the four guide openings (24) respectively.

3. The multi-station coordinated detection device for the surface quality of automobile covering parts according to claim 2 is characterized in that: The four lifting frames (5) are each provided with a plurality of side openings (25); the four electromagnet groups each include a plurality of conductor posts (26) and a plurality of spiral wires (27); the plurality of conductor posts (26) are respectively located in the plurality of side openings (25); and the plurality of spiral wires (27) are respectively wound around the plurality of conductor posts (26).

4. The multi-station coordinated detection device for the surface quality of automobile covering parts according to claim 3 is characterized in that: A stepped closing cover plate (28) is provided in each of the plurality of side openings (25).

5. The multi-station coordinated detection device for the surface quality of automobile covering parts according to claim 4 is characterized in that: The top ends of the two inner frames (3) and the top ends of the two outer frames (2) are fixedly connected with a group of connecting pressure plates (29), and the four groups of connecting pressure plates (29) are matched with a first pressing frame (30) and a second pressing frame (31). The four first pressing frames (30) are respectively connected to the four second pressing frames (31) by a plurality of assembly bolts (32), and the connecting pressure plates (29) are provided with through holes for the assembly bolts (32) to pass through. The two inner side bars (10) and the two outer side bars (11) are fixedly connected with a first connecting shaft (33) and a second connecting shaft (34). The four first pressing frames (30) are respectively provided with a first semicircular groove (35), and the four first semicircular grooves (35) are respectively matched with the four first connecting shafts (33). The four second pressing frames (31) are respectively provided with a second semicircular groove (36), and the four second semicircular grooves (36) are respectively matched with the four second connecting shafts (34).

6. The multi-station coordinated detection device for the surface quality of automobile panels according to claim 5, characterized in that: The outer cross frame (9) is provided with an angle scale line (37), and the inner cross frame (8) is fixedly connected with an angle guide head (38), and the angle guide head (38) matches the angle scale line (37).

7. The multi-station coordinated detection device for the surface quality of automobile panels according to claim 6, characterized in that: A hand-held ring (39) is fixedly connected to the top end of the rotating column frame (7), and a plurality of switch keys are installed at the bottom end of the hand-held ring (39).

8. The multi-station coordinated detection device for the surface quality of automobile covering parts according to claim 7 is characterized in that: The bottom end of the threaded rod (12) is fixedly connected to a limiting end plate (40).

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