Spring support hanger weld appearance visual detection device and method

Abstract

The present application relates to the technical field of weld appearance visual detection, in particular to a spring support hanger weld appearance visual detection device and method, which is used for detecting the weld appearance between the barrel body and the top plate of the spring support hanger shell, and the detection device comprises a detection seat, a detection table and a detection frame: the detection table is movably arranged on the detection seat along the vertical direction; the detection frame is rotatably connected to the detection seat around the axis X, and a detection mechanism is arranged on the detection frame, which comprises a first mounting part, a second mounting part, a display part, a visual camera, a first measuring rod and a second measuring rod. The present application can firstly detect the position, width and height of the weld by using the visual camera, and then recheck whether the position, width and height of the weld have defects through the mutual cooperation of the display part, the first measuring rod and the second measuring rod, so as to effectively improve the detection accuracy of the weld of the spring support hanger shell.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology for weld appearance, specifically to a visual inspection device and method for weld appearance of spring support hangers. Background Technology

[0002] Spring hanger shells are generally steel cylindrical structures, mainly composed of a cylindrical body, a base plate welded to the bottom of the cylindrical body, and a top plate welded to the top of the cylindrical body. The welding strength between these components affects the performance of the spring hanger. Therefore, the welds on the welded spring hanger shell are usually inspected. The welds on the spring hanger shell generally protrude outwards, with the outer surface of the protruding part roughly arc-shaped, and the weld as a whole is annular. The main inspection items for this type of weld include whether the weld position, width, and height meet the standards. Existing inspection methods mainly rely on visual inspection. The most prominent advantage of visual inspection is its high efficiency; however, it also has disadvantages. For example, the shooting angle of the visual camera and ambient light can affect the inspection accuracy. Therefore, existing visual inspection equipment suffers from low inspection accuracy. To address these issues, this invention proposes a visual inspection device and method for the appearance of spring hanger welds. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a visual inspection device and method for the appearance of weld seams of spring supports, which can re-inspect the position, width and height of weld seams to check for defects, effectively improving the inspection accuracy.

[0004] To achieve the above objectives, according to one aspect of the present invention, a visual inspection device for the weld appearance of a spring support hanger is provided for inspecting the appearance of the weld between the cylinder body and the top plate of the spring support hanger housing. The inspection device includes an inspection seat, an inspection platform, and an inspection frame: the inspection platform is vertically movably disposed on the inspection seat; the inspection frame is rotatably connected to the inspection seat about an axis X, and an inspection mechanism is disposed on the inspection frame.

[0005] The testing institutions include:

[0006] The first mounting part is fixed relative to the detection seat;

[0007] The second mounting part is fixed relative to the detection frame;

[0008] A vision camera is rotatably mounted on the first mounting part;

[0009] The display unit includes a first display unit and a second display unit disposed on the first mounting unit, and reference marks are provided on both the first display unit and the second display unit;

[0010] Two first measuring rods are arranged at intervals along the width direction of the weld and elastically connected to the second mounting part along the width direction of the weld. The first ends of the two first measuring rods abut against both sides of the weld, and the second ends of the two first measuring rods abut against the first display part. When the detection frame rotates around the axis X, the second ends of the first measuring rods can leave a measured mark on the first display part that is the same as its movement trajectory.

[0011] The second measuring rod is elastically connected to the second mounting part along the height direction of the weld. The first end of the second measuring rod abuts against the outwardly protruding part of the weld, and the second end of the second measuring rod abuts against the second display part. When the detection frame rotates around the axis X, the second end of the second measuring rod can leave a measured mark on the second display part that is the same as its movement trajectory.

[0012] Optionally, the second mounting part is provided with a movable slot, and the second measuring rod movably passes through the movable slot. The detection mechanism further includes a marking assembly, which includes a seal, a liquid inlet structure, and a liquid outlet structure. Two seals are spaced apart on the outside of the second measuring rod along the height direction of the weld. The outer sides of the two seals slide to seal against the inner wall of the movable slot. A sealed chamber is formed between the second measuring rod, the second mounting part, and the two seals. The liquid inlet structure includes a liquid inlet nozzle, a liquid outlet chamber, and a liquid passage hole on the second measuring rod. The liquid outlet chamber communicates with the sealed chamber through the liquid passage hole. The liquid outlet chamber is connected to a liquid supply device through the liquid inlet nozzle. The liquid supply device is configured to provide a pressurized marking medium to the liquid outlet chamber. The liquid outlet structure includes a liquid outlet pipe and a nozzle. The nozzle is connected to the movable slot through two liquid outlet pipes. In the height direction of the weld, the distance between the connection points of the two liquid outlet pipes and the movable slot is greater than the distance between the two seals.

[0013] Optionally, the first measuring rod is elastically connected to the second mounting part via a first elastic element, and the second measuring rod is elastically connected to the second mounting part via a second elastic element.

[0014] Optionally, the first end of the first measuring rod is provided with a first rolling element for reducing the friction between it and the weld, and the first end of the second measuring rod is provided with a second rolling element for reducing the friction between it and the weld.

[0015] Optionally, both the first display unit and the second display unit are made of cardboard and are fixed to the first mounting unit by vacuum adsorption. The second end of both the first measuring rod and the second measuring rod are pen structures.

[0016] Optionally, the first mounting part has a cavity, and the first mounting part is provided with a connecting nozzle for connecting the cavity to the air extraction source. The first mounting part is cylindrical and has upper and lower parts. The upper part of the first mounting part has a first adsorption hole for adsorbing the first display part, and the lower part of the first mounting part has a second adsorption hole for adsorbing the second display part.

[0017] Optionally, the first mounting part is elastically connected to the detection seat in the height direction of the weld seam via a connecting structure.

[0018] Optionally, the reference mark on the first display unit is two concentric circles with different diameters and coplanarity, and the reference mark on the second display unit is two circles with the same diameter and spaced apart along the axis X. The center of the reference mark on the first display unit and the center of the reference mark on the second display unit are both located on the axis X.

[0019] Optionally, two detection mechanisms are provided, and the two detection mechanisms are arranged symmetrically with the axis X as the center line.

[0020] According to another aspect of the present invention, a method for detecting appearance defects in spring support welds using the above-described visual inspection device for spring support welds is provided, comprising the following steps:

[0021] S100: Place the spring support housing to be tested on the test table, and make the central axis of the spring support housing collinear with the axis X;

[0022] S200: Use a vision camera to conduct preliminary photographic inspection of the weld. The photographic inspection items include whether the weld position, width, and height meet the standards.

[0023] S300: After the shooting inspection is completed, the shooting inspection results are re-inspected. During the re-inspection, the outer shell with the spring support is moved towards the inspection frame until the first ends of the two first measuring rods abut against the two sides of the weld respectively, and the first end of the second measuring rod abuts against the outward protruding part of the weld.

[0024] S400: Rotate the inspection frame to make the inspection mechanism rotate around axis X. The first ends of the two first measuring rods will always move in contact with the side of the weld under the action of elastic force, and the first end of the second measuring rod will always move in contact with the top of the weld under the action of elastic force. The second ends of the two first measuring rods will mark the position and width information of the weld on the first display, and the second end of the second measuring rod will mark the height information of the weld on the second display. The marks left by the two measuring rods on the two display are all actual measurement marks.

[0025] S500: Compare the measured marks with the reference marks on the display to determine whether there are defects in the appearance of the weld.

[0026] Compared with the prior art, the present invention provides a visual inspection device and method for the appearance of weld seams of spring supports, which has the following beneficial effects:

[0027] 1. The detection mechanism of the present invention includes a first mounting part, a second mounting part, a display part, a vision camera, a first measuring rod, and a second measuring rod. When inspecting welds, the vision camera can be used to perform a preliminary inspection of the weld's position, width, and height. Then, through the cooperation of the display part, the first measuring rod, and the second measuring rod, the position, width, and height of the weld can be re-inspected to check for defects. This can effectively improve the detection accuracy.

[0028] 2. By setting a marking component, and through the coordinated operation of the marking component and the second measuring rod, the present invention can automatically mark the location of the weld with high defects, which facilitates the subsequent repair work of the weld defects;

[0029] 3. By setting a first rolling element and a second rolling element, the present invention can reduce the resistance when the detection frame rotates, and also reduce the wear of components, thereby reducing the measurement error caused by component wear. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0033] Figure 4 For the present invention Figure 3 A magnified structural diagram at point A;

[0034] Figure 5 This is a schematic diagram of the structure of the detection frame and detection mechanism of the present invention;

[0035] Figure 6 This is a partial axial side view of the detection mechanism of the present invention;

[0036] Figure 7 This is a schematic diagram of another axial side structure of the detection mechanism of the present invention;

[0037] Figure 8 This is a partial cross-sectional structural diagram of the detection mechanism of the present invention;

[0038] Figure 9This is a schematic diagram of the connection structure of the present invention;

[0039] Figure 10 This is a schematic diagram showing the split structure of the first mounting part and the display part of the present invention.

[0040] In the diagram: 100, Detection seat; 110, Base; 111, Guide column; 120, Stand; 200, Detection table; 300, Detection frame; 310, First mounting part; 3100, Connecting nozzle; 3101, First adsorption hole; 3102, Second adsorption hole; 311, Second mounting part; 3110, Movable slot; 3111, Mounting slot; 320, First display part; 321, Second display part; 322, Reference mark; 330, First measuring rod; 331, Second measuring rod; 332, Pen; 340, Seal; 341, Sealed chamber; 342, Liquid inlet; 343, Drainage chamber 344. Liquid passage hole; 345. Drain pipe; 346. Nozzle; 350. Guide rod; 351. Guide plate; 360. First elastic element; 361. Second elastic element; 370. Guide shaft; 380. First rolling element; 381. Second rolling element; 390. Vision camera; 391. Rotary motor; 400. Drive device; 500. Spring support bracket housing; 510. Cylinder body; 520. Top plate; 530. Weld; 600. Upper shaft; 601. Connecting cavity; 602. Sliding hole; 610. Lower shaft; 611. Connecting part; 620. Sleeve; 630. Third elastic element. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example: Please refer to Figures 1 to 10 According to one aspect of the present invention, a visual inspection device for the weld appearance of a spring support hanger is provided for inspecting the appearance of the weld 530 between the cylinder body 510 and the top plate 520 of the spring support hanger housing 500. The inspection device includes an inspection base 100, an inspection table 200, and an inspection frame 300: the inspection table 200 is vertically movably disposed on the inspection base 100; the inspection frame 300 is rotatably connected to the inspection base 100 about an axis X, and an inspection mechanism is disposed on the inspection frame 300; specifically, in this embodiment, the vertical direction is... Figure 1In the vertical direction, the testing base 100 includes a base 110 and a stand 120 fixed to the top of the base 110. The testing table 200 is positioned above the base 110, and the testing frame 300 is connected to the top of the stand 120. A drive device 400 for driving the testing table 200 to move vertically is provided between the testing table 200 and the base 110. The drive device 400 can be a cylinder, a hydraulic cylinder, or an electric push rod. To make the vertical movement of the testing table 200 more stable, four guide columns 111 are also provided on the base 110, and the guide columns 111 are movably inserted through the testing table 200.

[0043] The inspection mechanism includes a first mounting part 310, a second mounting part 311, a display part, a vision camera 390, a first measuring rod 330, and a second measuring rod 331. The first mounting part 310 is fixed relative to the inspection seat 100; the second mounting part 311 is fixed relative to the inspection frame 300; the display part includes a first display part 320 and a second display part 321 mounted on the first mounting part 310, both with reference marks 322; the vision camera 390 is rotatably mounted on the first mounting part 310. Specifically, a rotary motor 391 can be mounted at the bottom of the first mounting part 310, and the vision camera 390 is fixedly mounted on the output shaft of the rotary motor 391. When the rotary motor 391 rotates, it can drive the vision motor 390 to rotate around axis X, allowing the vision motor 390 to move and capture images along the length of the weld; two first measuring rods 330 and 331 are also included. Rods 330 are spaced apart along the width direction of weld 530 and elastically connected to the second mounting part 311 along the width direction of weld 530. The first ends of the two first measuring rods 330 abut against the two sides of weld 530 respectively, and the second ends of the two first measuring rods 330 abut against the first display part 320. When the detection frame 300 rotates around axis X, the second ends of the first measuring rods 330 can leave a measured mark on the first display part 320 with the same movement trajectory. The second measuring rod 331 is elastically connected to the second mounting part 311 along the height direction of weld 530. The first end of the second measuring rod 331 abuts against the outwardly protruding part of weld 530, and the second end of the second measuring rod 331 abuts against the second display part 321. When the detection frame 300 rotates around axis X, the second end of the second measuring rod 331 can leave a measured mark on the second display part 321 with the same movement trajectory.

[0044] The visual inspection device for the weld appearance of the spring support hanger using the above-described structure is used by placing the spring support hanger shell 500 to be inspected on the inspection table 200, ensuring that the central axis of the spring support hanger shell 500 is collinear with the axis X. The inspection mechanism on the inspection frame 300 inspects the weld 530 between the cylinder body 510 and the top plate 520 of the spring support hanger shell 500. Specifically, the visual camera 390 first performs a preliminary photographic inspection of the weld 530, including whether the position, width, and height of the weld 530 meet the standards. After the photographic inspection is completed, the results are re-verified. During the re-verification, the inspection table 200 is moved upwards so that the first ends of the two first measuring rods 330 of the inspection mechanism are respectively attached to the two sides of the weld 530, and the first end of the second measuring rod 331 is attached to the top of the weld 530. Then, the inspection frame 390 is rotated. 00, causing the testing mechanism to rotate around axis X, the first ends of the two first measuring rods 330 will always move against the side of the weld 530 under the action of elastic force, and the first end of the second measuring rod 331 will always move against the top of the weld 530 under the action of elastic force. During this period, the second ends of the two first measuring rods 330 will mark the position and width information of the weld 530 on the first display unit 320, and the second end of the second measuring rod 331 will mark the height information of the weld 530 on the second display unit 321. The marks left by the two measuring rods on the two display units are all actual measurement marks, which are the actual parameters of the weld 530 between the cylinder 510 and the top plate 520 of the spring support hanger shell 500. By comparing the actual measurement marks with the reference mark 322 on the display unit, it is possible to more intuitively judge whether the appearance of the weld 530 meets the standard. Therefore, when using the above-described spring support weld 530 appearance inspection device, the position, width and height of the weld 530 can be initially inspected using the vision camera 390. Then, through the cooperation of the display unit, the first measuring rod 330 and the second measuring rod 331, the position, width and height of the weld 530 can be re-inspected to check for defects. This can effectively improve the inspection accuracy.

[0045] In the above embodiments, although the detection accuracy is improved, the location of defects in the weld 530 cannot be marked during the detection process, which is not conducive to subsequent repair work. Therefore, in some embodiments, a movable slot 3110 is provided on the second mounting part 311, through which the second measuring rod 331 movably passes. The detection mechanism also includes a marking assembly, which includes a seal 340, a liquid inlet structure, and a liquid outlet structure. Two seals 340 are fixedly disposed at intervals along the height direction of the weld 530 on the outside of the second measuring rod 331. The outer sides of the two seals 340 slide and seal against the inner wall of the movable slot 3110. A sealed chamber 341 is formed between the second measuring rod 331, the second mounting part 311, and the two seals 340. The liquid inlet structure includes a liquid inlet nozzle 342 and a liquid outlet chamber 34 on the second measuring rod 331. 3. A liquid passage hole 344 is provided, and a liquid discharge chamber 343 communicates with a sealed chamber 341 through the liquid passage hole 344. The liquid discharge chamber 343 is connected to a liquid supply device (not shown) through a liquid inlet 342. The liquid supply device is configured to provide a pressurized marking medium to the liquid discharge chamber 343. For example, the liquid supply device can be a gas cylinder, and the marking medium can be a mixture of compressed air and paint contained in the gas cylinder. The liquid discharge structure includes a liquid discharge pipe 345 and a nozzle 346. The nozzle 346 is connected to a movable slot hole 3110 through two liquid discharge pipes 345. In the height direction of the weld 530, the distance between the connection points of the two liquid discharge pipes 345 and the movable slot hole 3110 is greater than the distance between the two seals 340. With the above design, during the measurement of the height of the weld 530 by the second measuring rod 331 of the detection mechanism, the marking component can automatically mark the location of the height defect in the weld 530, which facilitates the subsequent repair work for the defect. Specifically, when the height of weld 530 is within the design height range of weld 530 (i.e., the height of weld 530 that meets appearance requirements), the sealed chamber 341 formed between the second measuring rod 331, the second mounting part 311, and the two seals 340 will be located between the connection point of the two drain pipes 345 and the movable slot 3110. The sealed chamber 341 is not connected to either of the two drain pipes 345, and the nozzle 346 does not spray the marking medium outward. However, when the height of weld 530 is higher or lower than the design height of weld 530, the second measuring rod 331 will move along the weld... The height of the 530 moves so that the sealed chamber 341 is connected to one of the drain pipes 345. When the sealed chamber 341 is connected to one of the drain pipes 345, the marking medium will be sprayed from the nozzle 346 and sprayed on the location of the height defect of the adjacent weld 530. This location can be the surface of the weld 530, or the cylinder 510 or top plate 520 of the spring support housing 500. This automatically marks the location of the height defect of the weld 530. The user can then quickly find the location of the weld 530 that needs to be repaired by making the mark.It can be seen that by the coordinated operation of the marking component and the second measuring rod 331, the location of the weld 530 with high defects can be automatically marked, which facilitates the subsequent repair work of the weld 530 defects.

[0046] In order to make the second measuring rod 331 move more stably along the height direction of the weld 530, in some embodiments, a guide rod 350 is fixedly provided on the second mounting part 311, and a guide plate 351 is fixedly provided on the second measuring rod 331. The guide rod 350 moves through the guide plate 351 in the height direction of the weld 530. The second measuring rod 331 is slidably connected to the second mounting part 311 in the height direction of the weld 530 through the guiding cooperation of the guide rod 350 and the guide plate 351.

[0047] In some embodiments, the first measuring rod 330 is elastically connected to the second mounting portion 311 via a first elastic element 360, and the second measuring rod 331 is elastically connected to the second mounting portion 311 via a second elastic element 361. Specifically, in this embodiment, both the first elastic element 360 and the second elastic element 361 are compression springs. Furthermore, to make the movement of the first measuring rod 330 along the width direction of the weld 530 more stable, a mounting groove 3111 is provided on the second mounting portion 311, through which the first measuring rod 330 is movably disposed. A guide shaft 370 is fixedly disposed on the first measuring rod 330, movably passing through the second mounting portion 311, and the first elastic element 360 is sleeved on the outside of the guide shaft 370. Of course, as long as the first elastic element 360 can elastically connect the first measuring rod 330 to the second mounting part 311 along the width direction of the weld 530, and the second elastic element 361 can elastically connect the second measuring rod 331 to the second mounting part 311 along the height direction of the weld 530, this application does not have any particular restrictions on the specific structural form of the first elastic element 360 and the second elastic element 361.

[0048] In some embodiments, the first end of the first measuring rod 330 is provided with a first rolling element 380 for reducing the friction between it and the weld 530, and the first end of the second measuring rod 331 is provided with a second rolling element 381 for reducing the friction between it and the weld 530. Specifically, in this example, the first rolling element 380 is a ball bearing structure, and the second rolling element 381 is a roller. By providing the first rolling element 380 and the second rolling element 381, on the one hand, the resistance when the detection frame 300 rotates can be reduced, and on the other hand, the wear of the components can be reduced, thereby reducing the measurement error caused by component wear.

[0049] In some embodiments, both the first display unit 320 and the second display unit 321 are made of cardboard and are fixed to the first mounting part 310 by vacuum adsorption. The second end of the first measuring rod 330 and the second end of the second measuring rod 331 are both pen 332 structures. Fixing the first display unit 320 and the second display unit 321 to the first mounting part 310 by vacuum adsorption facilitates the disassembly and replacement of the first display unit 320 and the second display unit 321. In other embodiments, the first display unit 320 and the second display unit 321 can also be an electronic drawing board, and the second ends of the two measuring rods can leave measured marks on the two display units by pressing.

[0050] To fix the first display unit 320 and the second display unit 321 to the first mounting part 310 by vacuum adsorption, in some embodiments, the first mounting part 310 has a cavity and is provided with a connecting nozzle 3100 for connecting the cavity to a vacuum source, which can be a vacuum pump. The first mounting part 310 is cylindrical and has upper and lower parts. The upper part of the first mounting part 310 has a first adsorption hole 3101 for adsorbing the first display unit 320, and the lower part of the first mounting part 310 has a second adsorption hole 3102 for adsorbing the second display unit 321. When it is necessary to fix the two display units to the first mounting part 310, the first display unit 320 and the second display unit 321 are first placed over the positions of the first adsorption hole 3101 and the second adsorption hole 3102, respectively. Then, the vacuum source is activated to make the cavity a negative pressure state. At this time, the first display unit 320 and the second display unit 321 can be adsorbed onto the first mounting part 310. When it is necessary to remove the two display units, turn off the air supply to disable the negative pressure in the cavity, and then the two display units can be easily removed from the first mounting part 310.

[0051] In some embodiments, the first mounting portion 310 is elastically connected to the detection seat 100 in the height direction of the weld 530 via a connecting structure. In this specific example, the connection structure may include an upper shaft 600, a lower shaft 610, a sleeve 620, and a third elastic element 630. The lower end of the lower shaft 610 is fixedly connected to the first mounting part 310. The upper end diameter of the upper shaft 600 is smaller than the small end diameter. The upper end of the upper shaft 600 is threaded. The upper end of the upper shaft 600 is fixed to the top of the stand 120 of the detection seat 100 by a nut. The detection frame 300 is rotatably connected to the outside of the lower end of the upper shaft 600 by a bearing. The lower end of the upper shaft 600 has a connecting cavity 601. The side of the upper shaft 600 has a sliding hole 602 communicating with the connecting cavity 601. The third elastic element 630 is a spring disposed in the connecting cavity 601. The upper end of the lower shaft 610 extends into the connecting cavity 601 and is fixedly connected to the inside of the sleeve 620 by a connecting part 611. Understandably, by connecting the first mounting part 310 to the detection seat 100 in the height direction of the weld 530 through the connecting structure, the first display part 320 on the first mounting part 310 can be pressed against the second end of the first measuring rod 330, ensuring that the second end of the first measuring rod 330 can leave a clear measured mark on the first display part 320. In addition, when it is necessary to remove the first display part 320 from the first mounting part 310, the first mounting part 310 can be moved away from the detection mechanism to separate the second end of the first measuring rod 330 from the first display part 320, which makes it easy to remove the first display part 320 from the first mounting part 310.

[0052] In some embodiments, the reference marks 322 on the first display unit 320 are two concentric circles of different diameters and coplanar, and the reference marks 322 on the second display unit 321 are two circles of the same diameter and spaced apart along the axis X. The centers of the reference marks 322 on the first display unit 320 and the reference marks 322 on the second display unit 321 are both located on the axis X. In specific implementations, the concentric circles can be a pattern drawn on the display unit with a compass before measurement or generated by printing.

[0053] In some embodiments, two inspection mechanisms are provided, and the two inspection mechanisms are arranged symmetrically with the axis X as the center line. By providing two inspection mechanisms, the weld 530 can be measured simultaneously by the two inspection mechanisms during the measurement process, which can shorten the inspection time and further improve the inspection efficiency.

[0054] According to another aspect of the present invention, a method for detecting appearance defects in spring support welds using the above-described visual inspection device for spring support welds is provided, comprising the following steps:

[0055] S100: Place the spring support housing 500 to be tested on the test table 200, and make the central axis of the spring support housing 500 collinear with the axis X;

[0056] S200: Use vision camera 390 to perform preliminary imaging inspection on weld 530. The imaging inspection items include whether the position, width and height of weld 530 meet the standards.

[0057] S300: After the shooting and testing is completed, the shooting and testing results are re-examined. During the re-examination, the outer shell 500 with the spring support bracket is moved towards the testing frame 300 until the first ends of the two first measuring rods 330 abut against the two sides of the weld 530 respectively, and the first end of the second measuring rod 331 abuts against the outward protruding part of the weld 530.

[0058] S400: Rotate the inspection frame 300 to make the inspection mechanism rotate around the axis X. The first ends of the two first measuring rods 330 will always move against the side of the weld 530 under the action of elasticity. The first end of the second measuring rod 331 will always move against the top of the weld 530 under the action of elasticity. The second ends of the two first measuring rods 330 will mark the position and width information of the weld 530 on the first display unit 320. The second end of the second measuring rod 331 will mark the height information of the weld 530 on the second display unit 321. The marks left by the two measuring rods on the two display units are all actual measurement marks.

[0059] S500: Compare the measured mark with the reference mark 322 on the display to determine whether there are any defects in the appearance of the weld 530.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A visual inspection device for the weld appearance of a spring support hanger, used to inspect the appearance defects of the weld (530) between the cylinder (510) and the top plate (520) of the spring support hanger housing (500), characterized in that, The detection device comprises a detection seat (100), a detection table (200) and a detection frame (300): the detection table (200) is movably arranged on the detection seat (100) in the vertical direction; the detection frame (300) is rotatably connected to the detection seat (100) around an axis X, and a detection mechanism is arranged on the detection frame (300); The detection mechanism comprises: A first mounting portion (310) fixed relative to the detection seat (100); A second mounting portion (311) fixed relative to the detection frame (300); A display portion comprising a first display portion (320) and a second display portion (321) arranged on the first mounting portion (310), and a reference mark (322) arranged on each of the first display portion (320) and the second display portion (321); A visual camera (390) rotatably arranged on the first mounting portion (310); A first measuring rod (330), two first measuring rods (330) are arranged in the width direction of the weld (530) and are elastically connected to the second mounting portion (311) in the width direction of the weld (530), the first ends of the two first measuring rods (330) are respectively in abutment with the two sides of the weld (530), the second ends of the two first measuring rods (330) are in abutment with the first display portion (320), and when the detection frame (300) rotates around the axis X, the second ends of the first measuring rods (330) can leave the same measured marks as their movement tracks on the first display portion (320); and A second measuring rod (331) elastically connected to the second mounting portion (311) in the height direction of the weld (530), the first end of the second measuring rod (331) is in abutment with the outwardly protruding part of the weld (530), the second end of the second measuring rod (331) is in abutment with the second display portion (321), and when the detection frame (300) rotates around the axis X, the second end of the second measuring rod (331) can leave the same measured marks as its movement tracks on the second display portion (321).

2. The spring hanger weld appearance visual inspection apparatus of claim 1, wherein: The second mounting part (311) is provided with a movable slot hole (3110), and the second measuring rod (331) movably penetrates through the movable slot hole (3110). The detection mechanism further comprises a marking assembly, the marking assembly comprises two sealing members (340), liquid inlet structure and liquid outlet structure, the two sealing members (340) are arranged on the outside of the second measuring rod (331) in the height direction of the weld (530), and outer sides of the two sealing members (340) are in sliding sealing with the inner wall of the movable slot hole (3110). A closed chamber (341) is formed between the second measuring rod (331), the second mounting part (311) and the two sealing members (340). The liquid inlet structure comprises a liquid inlet nozzle (342) arranged on the second measuring rod (331), a liquid outlet cavity (343) and a liquid passing hole (344). The liquid outlet cavity (343) communicates with the closed chamber (341) through the liquid passing hole (344). The liquid outlet cavity (343) is connected with a liquid supply device through the liquid inlet nozzle (342), and the liquid supply device is configured to provide the liquid outlet cavity (343) with a marking medium with pressure. The liquid outlet structure comprises a liquid outlet pipe (345) and a nozzle (346). The nozzle (346) is connected with the movable slot hole (3110) through two liquid outlet pipes (345). In the height direction of the weld (530), the distance between the connection points of the two liquid outlet pipes (345) and the movable slot hole (3110) is greater than the distance between the two sealing members (340).

3. The spring hanger weld appearance vision inspection apparatus of claim 1, wherein: The first measuring rod (330) is elastically connected with the second mounting part (311) through a first elastic element (360), and the second measuring rod (331) is elastically connected with the second mounting part (311) through a second elastic element (361).

4. The spring hanger weld appearance vision inspection apparatus of claim 1, wherein: A first rolling member (380) for reducing the friction between the first end of the first measuring rod (330) and the weld (530) is arranged on the first end of the first measuring rod (330), and a second rolling member (381) for reducing the friction between the first end of the second measuring rod (331) and the weld (530) is arranged on the first end of the second measuring rod (331).

5. The spring hanger weld appearance vision inspection apparatus of claim 1, wherein: The first display part (320) and the second display part (321) are both paperboards and are fixed on the first mounting part (310) by vacuum adsorption. The second end of the first measuring rod (330) and the second end of the second measuring rod (331) are both pen (332) structures.

6. The spring hanger weld appearance vision inspection apparatus of claim 5, wherein: The first mounting part (310) has a cavity, and a connecting nozzle (3100) for connecting the cavity with a gas suction source is arranged on the first mounting part (310). The first mounting part (310) is in a cylindrical shape and has two parts, an upper part and a lower part. The upper part of the first mounting part (310) has a first adsorption hole (3101) for adsorbing the first display part (320), and the lower part of the first mounting part (310) has a second adsorption hole (3102) for adsorbing the second display part (321).

7. The spring hanger weld appearance vision inspection apparatus of claim 6, wherein: The first mounting portion (310) is elastically connected with the detection seat (100) through a connecting structure in the height direction of the weld (530).

8. The spring hanger weld appearance visual inspection apparatus of any of claims 5-7, wherein: The reference marks (322) on the first display portion (320) are two concentric circles with different diameters and coplanar, the reference marks (322) on the second display portion (321) are two circles with the same diameter and arranged in the direction of the axis X, and the centers of the circles of the reference marks (322) on the first display portion (320) and the second display portion (321) are both located on the axis X.

9. The spring hanger weld appearance vision inspection apparatus of claim 1, wherein: The detection mechanism is provided with two, which are symmetrically arranged with the axis X as the center line.

10. A method of detecting defects in the appearance of welds of spring hangers using the apparatus for visually inspecting the appearance of welds of spring hangers according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: S100: placing the spring support shell (500) to be detected on the detection table (200), and making the center axis of the spring support shell (500) collinear with the axis X; S200: performing preliminary shooting detection on the weld (530) by using the visual camera (390), and the shooting detection items include whether the position, width and height of the weld (530) meet the standards; S300: after the shooting detection is completed, the shooting detection result is rechecked, and when the rechecking is performed, the spring support shell (500) is moved towards the detection frame (300) until the first ends of the two first measuring rods (330) abut against both sides of the weld (530) and the first end of the second measuring rod (331) abuts against the outward protruding part of the weld (530); S400: rotating the detection frame (300) to make the detection mechanism rotate around the axis X, the first ends of the two first measuring rods (330) will always move along the side surface of the weld (530) under the action of the elastic force, the first end of the second measuring rod (331) will always move along the top of the weld (530) under the action of the elastic force, the second ends of the two first measuring rods (330) will mark the position and width information of the weld (530) on the first display portion (320), the second end of the second measuring rod (331) will mark the height information of the weld (530) on the second display portion (321), and the marks left by the two measuring rods on the two display portions are all actual measurement marks; S500: comparing the actual measurement marks with the reference marks (322) on the display portions to judge whether the appearance of the weld (530) has defects.

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