Visual inspection device and method for appearance of welding seam of spring support hanger

Abstract

The invention relates to the technical field of weld appearance visual inspection, in particular to a spring support hanger weld appearance visual inspection device and method, which are used for detecting the appearance of a weld between a cylinder body and a top plate of a spring support hanger shell, 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 an axis X, a detection mechanism is arranged on the detection frame, and the detection mechanism comprises a first mounting part, a second mounting part, a display part, a visual camera, a first measuring rod and a second measuring rod. According to the invention, the position, width and height of the welding seam can be preliminarily detected by using the visual camera, and then whether defects exist in the position, width and height of the welding seam or not is rechecked through mutual cooperation of the display part, the first measuring rod and the second measuring rod, so that the detection precision of the welding seam of the spring support hanger shell is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of weld appearance visual inspection, and in particular to a device and method for visual inspection of weld appearance of a spring support hanger. Background Art

[0002] The shell of a spring hanger is generally a steel cylindrical structure, which is mainly composed of a cylinder, a bottom plate welded to the bottom of the cylinder, and a top plate welded to the top of the cylinder. The welding strength between the various components will affect 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 outward, and the outer surface of the protruding part is roughly arc-shaped. The weld is annular as a whole. The main inspection items for this type of weld include whether the weld position, width and height meet the standards. The existing detection means are mainly visual inspection. The most prominent advantage of visual inspection is high detection efficiency, but visual inspection also has disadvantages. For example, during visual inspection, the shooting angle of the visual camera, ambient light, etc. will affect the detection accuracy. Therefore, the existing visual inspection equipment has the problem of low detection accuracy. In response to the above problems, the present invention proposes a device and method for visual inspection of the appearance of spring hanger welds. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a device and method for visual inspection of the appearance of the weld of a spring support hanger, which can re-inspect whether there are defects in the position, width and height of the weld, and effectively improve the inspection accuracy.

[0004] To achieve the above objectives, according to one aspect of the present invention, a device for visually inspecting the appearance of a weld seam of a spring hanger is provided, for inspecting the appearance of a weld seam between a barrel and a top plate of a spring hanger housing. The device comprises 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 a detection mechanism is disposed on the inspection frame; The detection mechanism includes: A first mounting portion, fixed relative to the detection seat; A second mounting portion, fixed relative to the detection frame; a visual camera rotatably mounted on the first mounting portion; The display portion includes a first display portion and a second display portion provided on the first mounting portion, wherein the first display portion and the second display portion are both provided with reference marks; a first measuring rod, wherein two first measuring rods are spaced apart along the width direction of the weld and elastically connected to the second mounting portion along the width direction of the weld, wherein the first ends of the two first measuring rods respectively abut against two sides of the weld, and the second ends of the two first measuring rods abut against the first display portion, and when the detection frame rotates about the axis X, the second ends of the first measuring rods can leave measured marks on the first display portion that are identical to their movement trajectories; and The second measuring rod is elastically connected to the second mounting portion along the height direction of the weld, the first end of the second measuring rod abuts against the outwardly protruding portion of the weld, the second end of the second measuring rod abuts against the second display portion, and 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 portion that is the same as its movement trajectory.

[0005] Optionally, a movable slot is provided on the second mounting portion, and the second measuring rod movably passes through the movable slot. The detection mechanism also includes a marking assembly, and the marking assembly includes a seal, a liquid inlet structure and a liquid discharge structure. The two seals are arranged on the outside of the second measuring rod at intervals along the height direction of the weld, and the outer sides of the two seals are slidably sealed with the inner wall of the movable slot. A closed chamber is formed between the second measuring rod, the second mounting portion and the two seals. The liquid inlet structure includes a liquid inlet nozzle, a liquid discharge chamber and a liquid through hole provided on the second measuring rod. The liquid discharge chamber communicates with the closed chamber through the liquid through hole, and the liquid discharge 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 discharge chamber; the liquid discharge structure includes a liquid discharge pipe and a nozzle, and the nozzle is connected to the movable slot through two liquid discharge pipes. In the height direction of the weld, the distance between the connection points of the two liquid discharge pipes and the movable slot is greater than the distance between the two seals.

[0006] Optionally, the first measuring rod is elastically connected to the second mounting portion via a first elastic element, and the second measuring rod is elastically connected to the second mounting portion via a second elastic element.

[0007] Optionally, the first end of the first measuring rod is provided with a first rolling element for reducing friction between it and the weld, and the first end of the second measuring rod is provided with a second rolling element for reducing friction between it and the weld.

[0008] Optionally, the first display portion and the second display portion are both cardboards and are fixed to the first mounting portion by vacuum adsorption, and the second end of the first measuring rod and the second end of the second measuring rod are both pen structures.

[0009] Optionally, the first mounting part has a cavity, and a connecting nozzle for connecting the cavity to an exhaust source is provided on the first mounting part. The first mounting part is cylindrical and consists of an upper and lower part. 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.

[0010] Optionally, the first mounting portion is elastically connected to the detection seat via a connecting structure in the height direction of the weld.

[0011] Optionally, the reference mark on the first display portion is two concentric circles of different diameters and coplanar, and the reference mark on the second display portion is two circles of the same diameter and arranged at intervals along the direction of the axis X, and the center of the reference mark on the first display portion and the center of the reference mark on the second display portion are both located on the axis X.

[0012] Optionally, two detection mechanisms are provided, and the two detection mechanisms are symmetrically arranged with the axis X as the center line.

[0013] According to another aspect of the present invention, a method for detecting appearance defects of a spring hanger weld using the above-mentioned spring hanger weld appearance visual inspection device is provided, comprising the following steps: S100: Place the spring support and hanger housing to be tested on the testing table, and make the central axis of the spring support and hanger housing collinear with the axis X; S200: Use a visual camera to conduct preliminary photo inspection of the weld. The inspection items include whether the weld position, width and height meet the standards; S300: After the photographic inspection is completed, the photographic inspection results are re-inspected. During the re-inspection, the housing on which the spring support hanger is placed is moved toward the inspection frame until the first ends of the two first measuring rods respectively abut against the two sides of the weld, and the first end of the second measuring rod abuts against the outwardly protruding portion of the weld. S400: Rotate the detection frame so that the detection mechanism rotates 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. 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 of the weld on the first display. The second end of the second measuring rod will mark the height of the weld on the second display. The marks left by the two measuring rods on the two displays are both actual measurement marks. S500: Compare the measured mark with the reference mark on the display unit to determine whether there is a defect in the appearance of the weld.

[0014] Compared with the prior art, the present invention provides a device and method for visually inspecting the appearance of welds on spring supports and hangers, which has the following beneficial effects: 1. The inspection mechanism of the present invention includes a first mounting portion, a second mounting portion, a display portion, a visual camera, a first measuring rod, and a second measuring rod. When inspecting a weld, the visual camera can be used to perform a preliminary inspection of the weld's position, width, and height. The display portion, the first measuring rod, and the second measuring rod can then be used to coordinate and recheck whether the weld's position, width, and height are defective. This effectively improves inspection accuracy. 2. The present invention provides a marking assembly, which works in conjunction with the second measuring rod to automatically mark locations where weld height defects exist, facilitating subsequent repair work on weld defects. 3. The present invention provides the first rolling element and the second rolling element, which can, on the one hand, reduce the resistance during the rotation of the detection frame, and on the other hand, reduce the wear of components and reduce the measurement error caused by the wear of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the present invention; Figure 3 This is a schematic diagram of the main cross-sectional structure of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at point A; Figure 5 It is a structural schematic diagram of the detection frame and detection mechanism of the present invention; Figure 6 This is a schematic diagram of the structure of a partial one-axis side of the detection mechanism of the present invention; Figure 7 This is a schematic diagram of another axial side structure of a part of the detection mechanism of the present invention; Figure 8 It is a schematic diagram of a partial cross-section structure of the detection mechanism of the present invention; Figure 9 It is a structural schematic diagram of the connection structure of the present invention; Figure 10 It is a schematic diagram of the split structure of the first installation part and the display part of the present invention.

[0016] In the figure: 100, detection seat; 110, base; 111, guide column; 120, stand; 200, detection table; 300, detection frame; 310, first mounting portion; 3100, connecting nozzle; 3101, first adsorption hole; 3102, second adsorption hole; 311, second mounting portion; 3110, movable slot; 3111, mounting slot; 320, first display portion; 321, second display portion; 322, reference mark; 330, first measuring rod; 331, second measuring rod; 332, pen; 340, sealing member; 341, sealed chamber; 342, liquid inlet nozzle; 343, liquid discharge chamber ;344, liquid 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 member; 381, second rolling member; 390, visual camera; 391, rotating motor; 400, driving 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 DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0018] Example: See Figures 1 to 10 According to one aspect of an embodiment of the present invention, a spring hanger weld appearance visual inspection device is provided for inspecting the appearance of a weld 530 between a barrel 510 and a top plate 520 of a spring hanger housing 500. The inspection device comprises an inspection seat 100, an inspection platform 200, and an inspection frame 300: the inspection platform 200 is movably arranged on the inspection seat 100 along a vertical direction; the inspection frame 300 is rotatably connected to the inspection seat 100 around an axis X, and an inspection mechanism is arranged 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 platform 200 is arranged above the base 110, and the testing frame 300 is connected to the top of the stand 120. A driving device 400 for driving the testing platform 200 to move vertically is provided between the testing platform 200 and the base 110. The driving device 400 can be a cylinder, a hydraulic cylinder, or an electric push rod. In order to make the vertical movement of the testing platform 200 more stable, four guide columns 111 are also provided on the base 110. The guide columns 111 are movable and extend through the testing platform 200.

[0019] The detection mechanism includes a first mounting portion 310, a second mounting portion 311, a display portion, a visual camera 390, a first measuring rod 330 and a second measuring rod 331, wherein the first mounting portion 310 is relatively fixed to the detection seat 100; the second mounting portion 311 is relatively fixed to the detection frame 300; the display portion includes a first display portion 320 and a second display portion 321 arranged on the first mounting portion 310, and reference marks 322 are provided on the first display portion 320 and the second display portion 321; the visual camera 390 is rotatably arranged on the first mounting portion 310, specifically, a rotating motor 391 can be installed at the bottom of the first mounting portion 310, and the visual camera 390 is fixedly installed on the output shaft of the rotating motor 391. When the rotating motor 391 rotates, it can drive the visual motor 390 to rotate around the axis X, so that the visual motor 390 can move along the length direction of the weld to shoot; the two first measuring The rods 330 are arranged at intervals along the width direction of the weld 530 and are elastically connected to the second mounting portion 311 along the width direction of the weld 530. The first ends of the two first measuring rods 330 are respectively abutted against the two sides of the weld 530, and the second ends of the two first measuring rods 330 are abutted against the first display portion 320. When the detection frame 300 rotates around the axis X, the second ends of the first measuring rods 330 can leave a measured mark on the first display portion 320 that is the same as its movement trajectory; the second measuring rod 331 is elastically connected to the second mounting portion 311 along the height direction of the weld 530, the first end of the second measuring rod 331 is abutted against the outward protruding part of the weld 530, and the second end of the second measuring rod 331 is abutted against the second display portion 321. When the detection frame 300 rotates around the axis X, the second end of the second measuring rod 331 can leave a measured mark on the second display portion 321 that is the same as its movement trajectory.

[0020] The spring hanger weld appearance visual inspection device of the above structure is used. When in use, the spring hanger housing 500 to be tested is placed on the inspection table 200, and the central axis of the spring hanger housing 500 is aligned with the axis X. The weld 530 between the barrel 510 and the top plate 520 of the spring hanger housing 500 is inspected by the inspection mechanism on the inspection frame 300. Specifically, the weld 530 is firstly photographed and inspected by the visual camera 390. The photographic inspection items include whether the position, width and height of the weld 530 meet the standards. After the photographic inspection is completed, the photographic inspection results are re-inspected. During the re-inspection, the inspection table 200 is moved upward 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 300 is rotated. 00, so that the detection mechanism rotates around the axis X, and the first ends of the two first measuring rods 330 will always move in contact with the side of the weld 530 under the action of the elastic force, and the first end of the second measuring rod 331 will always move in contact with the top of the weld 530 under the action of the 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 part 320, and the second end of the second measuring rod 331 will mark the height information of the weld 530 on the second display part 321. The marks left by the two measuring rods on the two display parts are all measured marks, that is, the actual parameters of the weld 530 between the barrel 510 and the top plate 520 of the spring hanger housing 500. By comparing the measured mark with the reference mark 322 on the display part, it can be more intuitive to judge whether the appearance of the weld 530 meets the standard. It can be seen that when using the spring support hanger weld 530 appearance inspection device of the above structure, the position, width and height of the weld 530 can be preliminarily inspected using the visual camera 390, and then the position, width and height of the weld 530 can be re-inspected to see if there are any defects through the cooperation of the display unit, the first measuring rod 330 and the second measuring rod 331, which can effectively improve the inspection accuracy.

[0021] In the above embodiment, although the detection accuracy is improved, it is impossible to mark the position of the defect in the weld 530 during the detection process, which is not conducive to the subsequent repair work for the defect. To this end, in some embodiments, a movable slot 3110 is provided on the second mounting portion 311, and the second measuring rod 331 is movable through the movable slot 3110. The detection mechanism also includes a marking assembly, and the marking assembly includes a seal 340, a liquid inlet structure and a liquid discharge structure. The two seals 340 are fixedly provided on the outside of the second measuring rod 331 at intervals along the height direction of the weld 530. The outer sides of the two seals 340 are slidably sealed with the inner wall of the movable slot 3110. A closed chamber 341 is formed between the second measuring rod 331, the second mounting portion 311 and the two seals 340. The liquid inlet structure includes a liquid inlet nozzle 342, a liquid discharge cavity 342 provided on the second measuring rod 331, and a liquid discharge cavity 343. 3 and a liquid hole 344. The drainage chamber 343 communicates with the sealed chamber 341 through the liquid hole 344. The drainage chamber 343 is connected to a liquid supply device (not shown) via a liquid inlet nozzle 342. The liquid supply device is configured to supply a pressurized marking medium to the drainage 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 drainage structure includes a drainage pipe 345 and a nozzle 346. The nozzle 346 is connected to the movable slot 3110 via two drainage pipes 345. In the height direction of the weld 530, the distance between the connection points of the two drainage pipes 345 and the movable slot 3110 is greater than the distance between the two sealing members 340. With this design, when the second measuring rod 331 of the inspection mechanism measures the height of the weld 530, the marking assembly can automatically mark the location of the weld 530 where there is a height defect, facilitating subsequent repair work. Specifically, when the height of the weld 530 is within the design height of the weld 530 (i.e., the height of the weld 530 with an acceptable appearance), the closed chamber 341 formed between the second measuring rod 331, the second mounting portion 311, and the two sealing members 340 will be located between the connection points of the two drainage pipes 345 and the movable slot 3110. The closed chamber 341 is not connected to the two drainage pipes 345, and the nozzle 346 does not spray the marking medium outward. When the height of the weld 530 is higher or lower than the design height of the weld 530, the second measuring rod 331 will be located along the weld. 530 moves in the height direction, so that the closed chamber 341 is connected to one of the drainage pipes 345. When the closed chamber 341 is connected to one of the drainage pipes 345, the marking medium is sprayed from the nozzle 346 and sprayed on the position where the height defect of the adjacent weld 530 exists. This position can be the surface of the weld 530 or the barrel 510 or the top plate 520 of the spring support bracket housing 500, thereby automatically marking the position where the height defect of the weld 530 exists. The user can then quickly find the position where the weld 530 needs to be repaired through the mark.It can be seen from this that through the mutual cooperation between the marking component and the second measuring rod 331, the position where the height defect of the weld 530 exists can be automatically marked, which facilitates the subsequent repair work on the defect of the weld 530.

[0022] 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 portion 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, and the second measuring rod 331 is slidably connected to the second mounting portion 311 in the height direction of the weld 530 through the guiding cooperation of the guide rod 350 and the guide plate 351.

[0023] 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, the first elastic element 360 and the second elastic element 361 are both compression springs. In addition, to ensure more stable movement of the first measuring rod 330 along the width of the weld 530, a mounting slot 3111 is defined in the second mounting portion 311. The first measuring rod 330 is movably arranged to extend through the mounting slot 3111. A guide shaft 370 is fixedly provided on the first measuring rod 330. The guide shaft 370 is movably arranged to extend through the second mounting portion 311, and the first elastic element 360 is sleeved on the exterior 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 portion 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 portion 311 along the height direction of the weld 530, the present application has no special restrictions on the specific structural forms of the first elastic element 360 and the second elastic element 361.

[0024] In some embodiments, a first rolling element 380 is provided at the first end of the first measuring rod 330 to reduce friction between the first measuring rod 330 and the weld 530. A second rolling element 381 is provided at the first end of the second measuring rod 331 to reduce friction between the first measuring rod 330 and the weld 530. Specifically, in this embodiment, the first rolling element 380 is a ball bearing, and the second rolling element 381 is a roller. The provision of the first rolling element 380 and the second rolling element 381 not only reduces resistance during rotation of the detection frame 300 but also reduces component wear, thereby reducing measurement errors caused by such wear.

[0025] In some embodiments, the first display unit 320 and the second display unit 321 are both made of cardboard and secured to the first mounting portion 310 via vacuum suction. The second ends of the first measuring rod 330 and the second measuring rod 331 are each configured as a pen 332. Securing the first and second display units 320, 321 to the first mounting portion 310 via vacuum suction facilitates removal and replacement of the first and second display units 320, 321. In other embodiments, the first and second display units 320, 321 can be electronic drawing tablets, and the second ends of the two measuring rods can be pressed to leave measured marks on the two displays.

[0026] In order to secure the first display unit 320 and the second display unit 321 to the first mounting portion 310 by vacuum adsorption, in some embodiments, the first mounting portion 310 has a cavity and is provided with a connection nozzle 3100 for connecting the cavity to an air extraction source, which can be a vacuum pump. The first mounting portion 310 is cylindrical and has upper and lower parts. The upper portion of the first mounting portion 310 has a first adsorption hole 3101 for adsorbing the first display unit 320, and the lower portion of the first mounting portion 310 has a second adsorption hole 3102 for adsorbing the second display unit 321. When the two display units need to be secured to the first mounting portion 310, the first display unit 320 and the second display unit 321 are first placed over the first adsorption hole 3101 and the second adsorption hole 3102, respectively. Then, the air extraction source is activated to create a negative pressure in the cavity. At this point, the first display unit 320 and the second display unit 321 are adsorbed to the first mounting portion 310. When the two display parts need to be removed, the air extraction source is turned off to invalidate the negative pressure in the cavity, and the two display parts can be easily removed from the first mounting part 310 .

[0027] In some embodiments, the first mounting portion 310 is elastically connected to the detection base 100 via a connecting structure in the height direction of the weld 530 . Specifically in this example, the connection structure may include an upper shaft body 600, a lower shaft body 610, a sleeve 620 and a third elastic element 630. The lower end of the lower shaft body 610 is fixedly connected to the first mounting portion 310. The upper end diameter of the upper shaft body 600 is smaller than the small end diameter. A thread is provided at the upper end of the upper shaft body 600. The upper end of the upper shaft body 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 body 600 through a bearing. A connecting cavity 601 is provided at the lower end of the upper shaft body 600. A sliding hole 602 communicating with the connecting cavity 601 is provided on the side of the upper shaft body 600. The third elastic element 630 is a spring arranged in the connecting cavity 601. The upper end of the lower shaft body 610 extends into the connecting cavity 601 and is fixedly connected to the inner side of the sleeve 620 through a connecting portion 611. It can be understood that by elastically connecting the first mounting portion 310 to the detection seat 100 in the height direction of the weld 530 through the connecting structure, the first display portion 320 on the first mounting portion 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 portion 320. In addition, when the first display portion 320 needs to be removed from the first mounting portion 310, the first mounting portion 310 can be moved in a direction away from the detection mechanism to separate the second end of the first measuring rod 330 from the first display portion 320, so that the first display portion 320 can be easily removed from the first mounting portion 310.

[0028] In some embodiments, the reference marks 322 on the first display unit 320 are two coplanar concentric circles of different diameters, and the reference marks 322 on the second display unit 321 are two circles of the same diameter 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 a specific implementation, the concentric circles can be a pattern drawn on the display unit with a compass before measurement or printed out by a printer.

[0029] In some embodiments, two detection mechanisms are provided, and the two detection mechanisms are symmetrically arranged with axis X as the center line. By providing two detection mechanisms, during the measurement process, the weld 530 can be measured synchronously by the two detection mechanisms, which can shorten the detection time and further improve the detection efficiency.

[0030] According to another aspect of an embodiment of the present invention, a method for detecting appearance defects of a spring hanger weld using the above-mentioned spring hanger weld appearance visual inspection device is provided, comprising the following steps: S100: placing the spring support hanger housing 500 to be tested on the testing table 200, and making the central axis of the spring support hanger housing 500 collinear with the axis X; S200: Using the visual camera 390 to perform preliminary photographic inspection on the weld 530, the photographic inspection items include whether the position, width and height of the weld 530 meet the standards; S300: After the photographic inspection is completed, the photographic inspection results are re-inspected. During the re-inspection, the spring support hanger housing 500 is moved toward the inspection frame 300 until the first ends of the two first measuring rods 330 respectively abut against the two sides of the weld 530, and the first end of the second measuring rod 331 abuts against the outwardly protruding portion of the weld 530. S400: Rotate the detection frame 300 so that the detection mechanism rotates around the axis X. The first ends of the two first measuring rods 330 will always move in contact with the side of the weld 530 under the action of the elastic force. The first end of the second measuring rod 331 will always move in contact with 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 320. The second end of the second measuring rod 331 will mark the height information of the weld 530 on the second display 321. The marks left by the two measuring rods on the two displays are both actual measurement marks. S500: Compare the measured mark with the reference mark 322 on the display unit to determine whether there is any defect in the appearance of the weld 530.

[0031] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A spring hanger weld appearance visual inspection device for detecting appearance defects of a weld (530) between a barrel (510) and a top plate (520) of a spring hanger housing (500), characterized in that: The detection device comprises a detection seat (100), a detection platform (200) and a detection frame (300): the detection platform (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 includes: A first mounting portion (310) is fixed relative to the detection seat (100); A second mounting portion (311) is fixed relative to the detection frame (300); A display portion comprising a first display portion (320) and a second display portion (321) provided on the first mounting portion (310), wherein a reference mark (322) is provided on both the first display portion (320) and the second display portion (321); a visual camera (390) rotatably mounted on the first mounting portion (310); a first measuring rod (330), wherein two first measuring rods (330) are arranged at intervals along the width direction of the weld (530) and are elastically connected to the second mounting portion (311) along the width direction of the weld (530), wherein the first ends of the two first measuring rods (330) are respectively in contact with both sides of the weld (530), and the second ends of the two first measuring rods (330) are in contact 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 a measured mark on the first display portion (320) that is the same as its movement trajectory; and The second measuring rod (331) is elastically connected to the second mounting portion (311) along the height direction of the weld (530), the first end of the second measuring rod (331) abuts against the outwardly protruding portion of the weld (530), the second end of the second measuring rod (331) abuts against 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 a measured mark on the second display portion (321) that is the same as its movement trajectory.

2. The spring hanger weld appearance visual inspection device according to claim 1, characterized in that: A movable slot (3110) is provided on the second mounting portion (311), and the second measuring rod (331) is movable through the movable slot (3110). The detection mechanism further comprises a marking assembly, and the marking assembly comprises a sealing member (340), a liquid inlet structure and a liquid discharge structure. The two sealing members (340) are arranged on the outside of the second measuring rod (331) at intervals along the height direction of the weld (530). The outer sides of the two sealing members (340) are slidably sealed with the inner wall of the movable slot (3110). A closed chamber (341) is formed between the second measuring rod (331), the second mounting portion (311) and the two sealing members (340). The liquid inlet structure comprises a liquid inlet provided on the second measuring rod (331). A liquid nozzle (342), a liquid discharge cavity (343) and a liquid passage hole (344), wherein the liquid discharge cavity (343) is communicated with the sealed chamber (341) through the liquid passage hole (344), and the liquid discharge cavity (343) is connected to a liquid supply device through the liquid inlet nozzle (342), and the liquid supply device is configured to provide a pressurized marking medium to the liquid discharge cavity (343); the liquid discharge structure comprises a liquid discharge pipe (345) and a nozzle (346), and the nozzle (346) is connected to the movable slot hole (3110) through two liquid discharge pipes (345), and 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 sealing members (340).

3. The spring hanger weld appearance visual inspection device according to claim 1, characterized in that: 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).

4. The spring hanger weld appearance visual inspection device according to claim 1, characterized in that: The first end of the first measuring rod (330) is provided with a first rolling element (380) for reducing friction between the first measuring rod (330) and the weld (530), and the first end of the second measuring rod (331) is provided with a second rolling element (381) for reducing friction between the second measuring rod (331) and the weld (530).

5. The spring hanger weld appearance visual inspection device according to claim 1, characterized in that: The first display portion (320) and the second display portion (321) are both made of cardboard and are fixed to the first mounting portion (310) by vacuum adsorption, and 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 visual inspection device according to claim 5, characterized in that: The first mounting portion (310) has a cavity, and a connecting nozzle (3100) for connecting the cavity to an air extraction source is provided on the first mounting portion (310). The first mounting portion (310) is cylindrical and has an upper and lower part. The upper part of the first mounting portion (310) has a first adsorption hole (3101) for adsorbing the first display portion (320), and the lower part of the first mounting portion (310) has a second adsorption hole (3102) for adsorbing the second display portion (321).

7. The spring hanger weld appearance visual inspection device according to claim 6, characterized in that: The first mounting portion (310) is elastically connected to the detection seat (100) via a connecting structure in the height direction of the welding seam (530).

8. The spring hanger weld visual inspection device according to any one of claims 5 to 7, characterized in that: The reference mark (322) on the first display portion (320) is two concentric circles of different diameters and coplanar, and the reference mark (322) on the second display portion (321) is two circles of the same diameter and spaced apart in the direction of the axis X, and the center of the reference mark (322) on the first display portion (320) and the center of the reference mark (322) on the second display portion (321) are both located on the axis X.

9. The spring hanger weld appearance visual inspection device according to claim 1, characterized in that: There are two detection mechanisms, and the two detection mechanisms are symmetrically arranged with the axis X as the center line.

10. A method for detecting appearance defects of spring hanger welds using the spring hanger weld appearance visual inspection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S100: placing the spring support and hanger housing (500) to be tested on the test table (200), and making the central axis of the spring support and hanger housing (500) collinear with the axis X; S200: Using a visual camera (390) to perform preliminary photographic inspection on the weld (530), the photographic inspection items including whether the position, width and height of the weld (530) meet the standards; S300: After the photographic inspection is completed, the photographic inspection result is re-inspected. During the re-inspection, the housing (500) on which the spring support bracket is placed is moved toward the inspection frame (300) until the first ends of the two first measuring rods (330) respectively abut against the two sides of the weld (530), and the first end of the second measuring rod (331) abuts against the outwardly protruding portion of the weld (530); S400: Rotate the detection frame (300) so that the detection mechanism rotates around the axis X. The first ends of the two first measuring rods (330) will always move in close contact with the side of the weld (530) under the action of the elastic force, and the first end of the second measuring rod (331) will always move in close contact with 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 part (320), and the second end of the second measuring rod (331) will mark the height information of the weld (530) on the second display part (321). The marks left by the two measuring rods on the two display parts are both measured marks. S500: Compare the measured mark with the reference mark (322) on the display portion to determine whether there is a defect in the appearance of the weld (530).

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