KR20080012614A - Method and system for examining defect of auto steel rim - Google Patents

Abstract

A method and a system for examining defects of a vehicle steel rim are provided to improve reliability of welding examination by inspecting defects of the welded portion of the rim through a fluorescence magnetic partial test. A method for examining defects of a vehicle steel rim performs welding examination on a rim of a wheel by a magnetic examination method. The method comprises the steps of seating the inner surface of the rim on an electromagnet yoke on which a coil is wound, spraying a material including fluorescent material onto the welded portion of the rim, and magnetizing the rim by feeding current.

Description

METHOD AND SYSTEM FOR EXAMINING DEFECT OF AUTO STEEL RIM}

1 is a schematic block diagram illustrating a method and system for inspecting a failure of a steel rim of an automobile according to the present invention;

2 is a process chart for explaining a method for a defect inspection of a steel rim of the vehicle according to the present invention,

3a to 3b is a view for explaining the magnetization step of the rim in the method for the defect inspection of the automobile steel rim according to the present invention,

4a to 4c is a view for explaining the magnetization apparatus of the method and system for the defect inspection of the steel rim of the vehicle according to the present invention,

5 is a view for explaining an ultraviolet irradiation device and a camera in a method and system for a defect inspection of an automobile steel rim according to the present invention;

6 is a view illustrating a display screen of the welding failure determination step in the method for the defect inspection of the automotive steel rim according to the present invention,

7 and 8 are photographs showing an image captured by the inspection of the weld defect of the rim by the method and system for the defect inspection of the steel rim of the vehicle according to the present invention,

9A and 9B are photographs showing a system for a failure inspection of a steel rim of an automobile according to a preferred embodiment of the present invention;

10 is a front view showing a system for a failure inspection of a steel steel rim according to a preferred embodiment of the present invention,

11 is a side view showing a system for a failure inspection of a steel steel rim according to a preferred embodiment of the present invention,

12A and 12B are front and cross-sectional views showing an ultraviolet irradiating apparatus of a system for inspecting a failure of an automobile steel rim according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: System for defect inspection of automobile steel rim,

20: 100 frame:

200: ignition unit, 210: ignition jig,

210a: electromagnet yoke 212: support member,

214: magnet member, 216: coil,

300: fluorescence powder supply device, 310: spray nozzle,

400: ultraviolet irradiation device, 500: camera,

510: CCD camera, 520: lens,

530: shield member, 610: rim rotation device,

620: welding sensor, 700: inspection robot,

800: transfer robot.

The present invention relates to a method and system for defect inspection of a steel rim of an automobile, and more particularly, to accurately and quickly perform defects on a welded portion of a rim constituting a wheel on which a tire of an automobile is mounted. The present invention relates to a method and a system for a failure inspection of a steel rim of an automobile.

Generally speaking, the wheel of a vehicle refers to a wheel, but the wheel of a vehicle is composed of tires and wheels, and the wheels share the entire weight of the vehicle with the tires, torque during braking and driving, impact on the road surface, and turning. The centrifugal force of the city is supported. The wheel is composed of a rim (Rim) on which the tire is seated and a disk formed by welding on the rim for mounting the wheel to the hub of the vehicle.

On the other hand, the rim is formed in the shape of the steel plate member in a substantially circular ring shape during the manufacturing process and the connection portion is completed through the C0₂ welding process, the rim performs a very important role for the vehicle's running and safety welding Defect inspection is very essential, and inspection by non-destructive inspection equipment is generally used as such welding inspection. In the case of the rim, many bends and complicated shapes make it very difficult to apply nondestructive inspection. The test is running.

However, such visual inspection requires a large number of manpower with skilled experience and is unable to secure the reliability of the inspection, thus acting as a very fatal cause for the safety of the vehicle.

Accordingly, in recent years, techniques for solving the problem of visual inspection have been proposed, such as "auto parts inspection apparatus using a vision system" shown in Korean Laid-Open Patent Publication No. 2005-0073130. An apparatus equipped with a camera and a microprocessor has been proposed to compare an image taken by an image of an automobile part with an image of a predetermined automobile part, but according to such an inspection apparatus, the degree of shape defect of a component can be inspected. However, there was a problem that the fine weld defects formed on the welded portion of the rim cannot be inspected.

And "Korean wheel inspection apparatus and method using a vision system" shown in Korean Patent Laid-Open Publication No. 2000-0072236, the inspection table seating the wheel, the first camera and the second camera to obtain the image of the wheel, A motor for rotating the wheel, a PLC for controlling the inspection table and the entire line, and an operator computer for detecting a welding position of the wheel by the image signal obtained by the camera are configured. Although the convenience of inspection is provided to some extent, there is a problem in that the detection of defects formed on the welded portion is dependent on the image signal obtained by the camera, and thus it is impossible to detect a weld defect formed on the inside of the rim.

In addition, Japanese Patent Laid-Open Publication No. 1997-122965 discloses a method and apparatus for welding inspection of the rim of an automobile wheel, as disclosed in Japanese Patent Laid-Open Publication No. 1997-122965. (METHOD AND DEVICE FOR INSPECTING WELDING ZONE OF WHEEL RIM FOR AUTOMOBILE) has been proposed, but this technique also has a problem in that it is impossible to accurately detect a weld defect formed inside the rim as in the above-described technique. There is a problem that can not correctly identify the good and defective products, and can not ensure the reliability of the inspection of the welded portion of the rim has a serious adverse effect on the running and safety of the car.

On the other hand, as a technique for inspecting the weld defects of the rim of the automobile wheel, a magnetization method, which is widely used as a method for inspecting weld defects of a metal, may be used, but such a magnetization method may be performed only in a dark room. Because it is possible to have a separate dark room, it is very difficult to apply on the rim manufacturing line, relatively expensive equipment and very difficult to handle, as well as to move the rim to a separate dark room to inspect on the manufacturing line There was a problem that the flow operation is blocked, the productivity is lowered and the labor and manufacturing time is increased.

The present invention has been made to solve the conventional problems as described above to ensure that the defects of the welded portion of the rim can be carried out accurately and quickly by the fluorescence particle inspection method to ensure the reliability of the weld inspection and workability of the weld inspection It is an object of the present invention to provide a method and system for defect inspection of automobile steel rims that not only improves but also improves the driving performance and safety of the automobile.

Another object of the present invention is to provide a method and system for defect inspection of automotive steel rims, which allows for improved productivity by enabling flow operations in the manufacturing process by simply and quickly inspecting defects formed on welded portions of rims on a rim manufacturing line of wheels. The purpose is to provide.

According to a feature of the present invention for achieving the above object, the present invention is a method for a defect inspection of a steel rim of the automobile to perform a rim weld inspection of the wheel by the magnetization inspection method, the coil on the electromagnet yoke The inner surface of the rim is seated and a current is supplied so that the rim is magnetized.

In the method for the defect inspection of the steel rim of the vehicle according to the present invention, the method for inspecting the weld defect, the loading step of loading the rim to be subjected to the welding inspection to the electromagnet yoke for welding inspection; A fluorescent powder injection step of spraying a dispersant containing fluorescent particles onto the welded portion of the rim loaded by the loading step; A magnetization step of applying electric power to the electromagnet yoke so that the rim in which the fluorescence is injected is magnetized by the fluorescence powder injection step; A welding inspection step of performing a welding inspection by simultaneously irradiating ultraviolet rays to the welding portion of the magnetized rim by the magnetization step; Determination of welding defects by a predetermined program by receiving the imaging signal photographed by the welding inspection step, and welding defect determination step of extracting and processing data such as the number of inspections, defects, and defective rate and display the captured image includes Can be done.

In the method for defect inspection of the steel rim of the automobile according to the present invention, the fluorescent particles supplied in the magnetization step can be carried out by forming a concentration range of 0.3 ~ 1.5 g / l using water as a dispersion.

In the method for the defect inspection of the steel rim of the automobile according to the present invention, the welding inspection step is the ultra-low light CCD camera and the ultraviolet irradiation device equipped with a lens to block ultraviolet rays at the end of the robot arm has a dark room function by the shield member It can be performed by a test robot installed to be granted.

In the method for the defect inspection of the steel rim of the automobile according to the present invention, the CCD camera has a resolution of 1/3 ", ultra-low intensity 0.0002 lux (lux), the lens is ultraviolet and infrared blocking filter (blocking ultraviolet rays) ( It consists of UV & Infrared cut filter and Yellow-green filter with excellent visibility of fluorescence light, so the Yellow-green color of fluorescent particles that are seated on the rim's welding part Can be taken to be photographed.

In the method for a defect inspection of a steel rim of the vehicle according to the present invention, the light output of the ultraviolet rays irradiated to the welding portion of the rim can be irradiated in the range of 400nm to 365nm.

In the method for the defect inspection of the automobile steel rim according to the present invention, the electromagnet yoke may be configured on a plurality of sliders that can be moved left and right, and the welding inspection step may be repeatedly performed while moving onto the inspection robot.

In the method for inspecting the rim weld defect of the wheel according to the present invention, the rim can be loaded and unloaded on the electromagnet yoke by a transport robot that is transported back and forth, left and right and up and down.

In the method for defect inspection of the steel rim of the automobile according to the present invention, when the welding position is detected by the welding part sensor to rotate the rim caught in the electromagnet yoke by the loading step, the fluorescent particles The spraying step can be performed.

According to a feature of the present invention for achieving the above object, the present invention is a system for the failure inspection of the steel rim of the automobile to perform the rim welding defect of the wheel by the magnetization inspection method, the rim is inserted into the inner surface The seating unit is characterized in that the ignition unit is configured to magnetize the rim by a current to which the coil is wound and selectively supplied.

In the system for defect inspection of the steel rim of the vehicle according to the present invention, the ignition unit is an electromagnet yoke and the electric current selectively to the coil wound around the electromagnet yoke is seated by the rim to be subjected to the welding inspection A plurality of ignition jig provided with a power supply; The ignition jig may be spaced apart at regular intervals and may be composed of a slider slidably installed on the frame so that the position of the ignition jig is adjusted in the left and right directions.

In the system for defect inspection of the automobile steel rim according to the present invention, the electromagnet yoke is installed in parallel spaced apart at regular intervals and a pair of support members wound on the outer surface of the coil; It may be composed of a magnetizing member which is installed at the end of the support member and formed with a seating groove recessed in the same shape so that the inner circumferential surface of the rim is in close contact with each other.

In such a system for a failure inspection of the automobile steel rim according to the present invention, the support member may be configured such that the left and right spacing is adjusted so that the rims of various sizes are installed and inspected on the electromagnet yoke.

In the system for the defect inspection of the steel rim of the vehicle according to the present invention, the irradiation of ultraviolet rays to the welding portion of the rim magnetized on the electromagnet yoke and at the same time performing the photographing operation to perform the ultraviolet ray irradiation on the end of the robot arm An inspection robot equipped with a device and a camera may be configured.

In the system for defect inspection of the automobile steel rim according to the present invention, the camera is composed of an ultra-low light CCD camera equipped with a lens for blocking ultraviolet rays, the ultraviolet irradiation device is installed in contact with the lens and the outside of the The shielding member for blocking the outer tube is configured to give a dark room function.

In the system for defect inspection of the steel rim of the vehicle according to the present invention, the CCD camera is composed of 1/3 "resolution, ultra-low intensity 0.0002 lux (color), and the lens blocks ultraviolet rays and infrared rays to block ultraviolet rays. It is composed of UV & Infrared cut filter and Yellow-green filter with excellent visibility of fluorescence light, and the Yellow-green color of fluorescent particles deposited on the welding part of the rim The shooting is clearly observed.

In the system for defect inspection of the steel rim of the automobile according to the present invention, the ultraviolet irradiation device is configured to arrange a plurality of light emitting diodes (LED) having a light output in the range of 400nm to 365nm to form an edge of the lens It will be installed in contact with.

In the system for defect inspection of the steel rim of the vehicle according to the present invention, by receiving the imaging signal photographed by the camera to determine whether the welding failure by a predetermined program, and extracts data such as the number of inspection, defect number and defect rate A control device for processing and displaying the captured image is constructed.

In the system for defect inspection of the automobile steel rim according to the present invention, a plurality of rims are formed on the lower side of the left and right movement path of the electromagnet yoke by rotating the rim caught on the electromagnet yoke so that the welded portion is positioned in the upper center. A rotating device; The rim rotated by the rim rotation device may be configured to include a welding part sensor for detecting the welding position is located in the upper center to stop the rotation operation of the rim rotation device.

In the system for defect inspection of the steel rim of the vehicle according to the present invention, a transport robot configured to be movable back and forth, left and right and up and down to load and unload the rim on the ignition jig.

In the system for defect inspection of the steel rim of the automobile according to the present invention, the rim is loaded with the rim is loaded in the inspection standby state; Fluorescent particle supply device for supplying a dispersant containing a fluorescent particle to the welding portion of the rim seated on the ignition jig can be configured.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, FIGS. 1 to 12B, and like reference numerals refer to like elements in FIGS. 1 to 12B. Meanwhile, the drawings and detailed descriptions of configurations, operations, and effects that can be easily understood by those skilled in the art from general technology in each drawing are briefly or omitted, and are illustrated based on parts related to the present invention.

1 is a schematic block diagram for explaining a method and system for a failure inspection of a steel rim according to the present invention, Figure 2 is a process diagram for explaining a method for a failure inspection of a steel rim according to the present invention, 3a to 3b is a view for explaining the magnetization step of the rim in the method for the defect inspection of the automobile steel rim according to the present invention, Figures 4a to 4c is a magnetization of the method and system for the defect inspection of the automobile steel rim according to the present invention Figure for explaining the device, Figure 5 is a view for explaining a UV irradiation apparatus and a camera in a method and system for a failure inspection of a steel steel rim according to the present invention, Figure 6 is for a failure inspection of a steel steel rim according to the present invention 7 and 8 are views illustrating a display screen of the welding failure determination step in the method for the failure inspection of the steel rim of the vehicle according to the present invention 9A and 9B are photographs showing a captured image of a weld defect of a rim by a method and a system. FIGS. 9A and 9B are photographs showing a system for defect inspection of an automobile steel rim according to a preferred embodiment of the present invention. Front view showing a system for a failure inspection of a steel rim according to a preferred embodiment, Figure 11 is a side view showing a system for a failure inspection of a steel rim according to a preferred embodiment of the present invention, Figures 12a and 12b are preferred Front and sectional views showing an ultraviolet irradiation device of a system for inspecting a failure of a steel rim of a vehicle according to an embodiment.

Referring to FIG. 1, a method for inspecting a failure of a steel rim of an automobile according to the present invention is implemented to perform a rim welding inspection of an automobile wheel by using a magnetization inspection method, and a coil is wound on an electromagnet yoke 210a. The inner surface of the rim 20 is installed so that the rim 20 is magnetized by supplying a current to perform a welding test.

In addition, the method for the defect inspection of the steel rim of the vehicle according to the present embodiment specifically to inspect the welding defects by the fluorescent magnetic method, as shown in Figure 2, the loading step 11, and the fluorescent powder injection step 13 ), The magnetization step 14 and the welding inspection step 15 and the welding failure determination step 16 are sequentially performed, and the welding defects such as cracks formed on the welded portions of the rim are inspected, and then discharged through the discharge step 17. Will be discharged. At this time, before the magnetization step 14 is carried out, the cleaning unit is configured to remove the oil, rust and foreign substances in the welded portion of the rim manufactured through the manufacturing line of the rim so that the magnetization efficiency is improved.

Loading step 11 is a step of loading the rim 20 to be subjected to the welding inspection, the electromagnet yoke 210a for welding inspection, as shown in Figure 4b, 4c, 9a and 9b, The rim 20 supplied to the rim loading rail 400 through the manufacturing line and the cleaning unit of the installation is installed in the electromagnet yoke 210a. Such a step 11 is a transport robot configured to move back and forth, left and right and up and down. It is preferably performed automatically by 800.

Fluorescent powder injection step 13 is a step of injecting a dispersant containing a fluorescent powder to the welding portion 22 of the rim 20 loaded by the loading step 11, magnetic particles (magnetic) generally used for welding inspection Particles are classified into fluorescent particles and non-fluorescent powders according to the observation method, and dry powders and wet powders according to the application method. However, in the present embodiment, the particles have excellent visibility compared to non-fluorescent powders. Weld inspection is performed by In addition, since the fluorescent substance is a fluorescent agent adhered to the reduced and electrolytic iron or iron oxide, the fluorescent agent is deteriorated by the irradiation of ultraviolet rays and the brightness is lowered, so that the fluorescent substance should be managed so as not to be exposed to ultraviolet rays during storage and use.

On the other hand, the fluorescent powder is a magnetic powder mainly used in a wet method is mixed and used in the dispersant, water or oil is used as such a dispersant. The dispersant should have a uniform distribution of magnetic powder and contain an appropriate amount of magnetic powder to maintain a constant concentration. The dispersant is formulated to have a concentration range of approximately 0.3 to 1.5 g / l, but preferably 0.8 g of water as a dispersant. This should be done at a concentration of / l.

The magnetization step 14 is a step of applying power to the electromagnet yoke 210a to magnetize the rim 20 in which the fluorescent particles are injected to the welding site 22 by the fluorescence powder injection step 13, the magnetization step When the ferromagnetic rim 20 is magnetized by (14), a magnetic field is formed as shown in FIG. 3A. At this time, when there is a change or crack in the structure of the welding part 22, it is shown in FIG. 3B. As described above, the continuity of the magnetic field is broken at the site, and a leakage field is formed. In this case, the fluorescent particles sprayed on the surface of the corresponding welding site cling to the site where the leakage magnetic field is formed, leaving a trace. , Size, direction and range can be identified.

In this embodiment, the electromagnet yoke 210a is installed in parallel and spaced at regular intervals as shown in FIGS. 4A, 4C, and 10, and a pair of support members in which the coil 216 is wound on its outer surface ( 212 and a magnetizing member having a seating groove 215 formed at an end of the support member 212 and recessed in the same shape as that of the inner circumferential surface of the rim 20 so that the inner circumferential surface of the rim 20 is stably in close contact with each other ( 214, a direct current from a power supply (not shown) is applied to the support member 212, so that the rim can be magnetized even if the current is not applied directly to the rim, and the type of current can be easily changed as necessary. As well as to easily detach the rim 20.

The welding inspection step 15 is irradiated with ultraviolet rays to the welding portion 22 of the rim 20 magnetized by the magnetization step 14 as shown in FIGS. In this embodiment, the ultra-low illumination CCD camera 510 and the ultraviolet irradiation device 400 are provided with a lens 520 for blocking ultraviolet rays at the end of the robot arm of the inspection robot 700. It is installed to block the inflow of external light by the shielding member 530 to perform the same photographing effect as photographed in the dark room.

The ultraviolet irradiation device 400 and the camera 500 are installed on the robot arm of the robot 700 to move to the welding part 22 of the rim 20 to perform the photographing operation according to the driving operation of the robot arm. The robot 700 is preferably applied to a multi-joint robot that is widely used as a welding robot so that the shooting position can be variously photographed.

In addition, the ultraviolet rays irradiated to the welding portion 22 of the rim 20 ranges from violet, the shortest wavelength, to invisible ultraviolet light (UV) from visible light. The light output is performed by irradiating light with a wavelength of 400nm to 365nm. This range of light is irradiated by the invisible ultraviolet light to the material containing the fluorescent material, such as fluorescent particles, because the wavelength is shorter than the violet of visible light, the light is absorbed by the fluorescent material and the wavelength is It uses light that emits long and bright rays in the visible range (700nm to 400nm).

Preferably, in the present embodiment, the light is radiated by a light emitting diode (LED) emitting ultraviolet light (UV-A) having a light output of 395 nm, so that the yellow / green range is most sensitive to the human eye. The light of wavelength (555nm) is emitted to ensure maximum visibility.

Meanwhile, the camera 500 is a CCD camera 510 having a resolution of 1/3 "and a color ultra low illuminance of 0.0002 lux, and the lens 520 is an ultraviolet and infrared cut filter for blocking ultraviolet rays (UV & Infrared). It is composed of a cut filter and a yellow-green filter with excellent visibility of fluorescence light, so that the yellow-green color of fluorescent particles deposited on the rim welding part can be clearly captured. do.

In the welding failure determination step 16, as illustrated in FIG. 6, the determination of the welding failure and the number of inspections, the number of defects, and the defect rate are determined by a predetermined program by receiving an image signal photographed by the welding inspection step 15. Extracting and processing data and displaying a captured image.

Meanwhile, FIGS. 7 and 8 are photographs showing captured images of the welding defects of the rims by the method for the defect inspection of the steel rims according to the present invention as described above. First, the crack length is 1.5 as an inspection object. A rim with a crack width of 0.1 mm to 0.3 mm was selected. The current was set at DC POWER 60V / 3 (Amp) for 1 to 3 seconds, and fluorescent particles made of wet powder were injected onto the welding site.

7 is a case of inspecting oil as a dispersing material and confirming weld defects of 0.5 mm and a crack of 10 mm, and FIG. 8 is also a case of inspecting water as an injection material. Weld defects of 0.5mm and crack 10mmm can be confirmed, but since the visibility of cracks can be confirmed more clearly in the case of inspecting water by applying it as a dispersant, it is preferable to perform inspection by using water as an injection material in this embodiment.

1, 4A, 4B, 4C, 5, 9A, 9B, and 12B, a system for inspecting a rim weld defect of a wheel according to a preferred embodiment of the present invention will be described. do.

The system 10 for inspecting the failure of the steel rim of the vehicle according to the present embodiment is formed by welding from a rim manufacturing line as shown in FIG. 1 and then washed through a washing unit to supply the wheel to the rim loading rail 400. The frame 100, the ignition unit 200, the inspection robot 700, the transfer robot 800, and the control device (not shown) so that the rim 20 is seated and weld defects formed on the welded portions of the rim are examined by the fluorescent magnetic method. Is constructed.

The ignition unit 200 is configured to magnetize the rim by the current to which the rim 20 is inserted and the inner surface thereof is seated, and the coil is wound and selectively supplied, as shown in FIGS. 1 and 4a to 4c. As described above, a power supply device for selectively energizing an electric current to the electromagnet yoke 210a and the coil 216 wound on the electromagnet yoke 210a to which the rim 20, which is subjected to welding inspection, is seated and seated ( A plurality of ignition jig 210 and a plurality of ignition jig 210 is provided at regular intervals, and the ignition jig 210 is slidable on the frame 100 so that the position of the ignition jig 210 is adjusted in the left and right directions. It consists of a slider 220 is installed.

And the electromagnet yoke 210a is formed of a member of an electrically conductive material, as shown in Figures 4a, 4c, 9 and 10 spaced at regular intervals are installed in parallel and the coil is wound on the outer surface The magnetizing member 214 is provided with a pair of supporting members 212 and a mounting groove 215 which is installed at an end of the supporting member 212 and is recessed in the same shape so that the inner circumferential surface of the rim 20 is stably in close contact with each other. It consists of. Preferably, the support member 212 may be configured to adjust the left and right spacing so that the rim 20 of various sizes is installed and inspected on the electromagnet yoke 210a.

9A, 9B, and 10, the inspection robot 700 irradiates ultraviolet rays to the welding part 22 of the rim 20 magnetized on the electromagnet yoke 210a and simultaneously performs a photographing operation. It is configured to perform a welding test by performing, the ultraviolet irradiation device 400 and the camera 500 is mounted on the end of the robot arm.

The camera 500 is composed of an ultra-low illumination CCD camera 510 equipped with a lens 520 that blocks ultraviolet rays, as shown in FIGS. 5 and 9b, and is in contact with the lens 520. ) Is installed and the shielding member 530 for blocking external light is configured on the outside to obtain the same photographing effect as that taken in the dark room at the time of photographing.

The CCD camera 510 has a resolution of 1/3 "and a color ultra low illuminance of 0.0002 lux, and the lens 520 is an ultraviolet and infrared cut filter for blocking ultraviolet rays. And a yellow-green filter having excellent visibility of fluorescence light, and the yellow-green color of fluorescent particles deposited on the welding portion 22 of the rim 20 is clear. Is taken.

The ultraviolet irradiation device 400 is irradiated with ultraviolet rays to the welding portion 22 of the rim 20 is sprayed by a fluorescent material supply device 300 to be described later, the fluorescent material is photographed by the camera 500 As shown in FIGS. 12A and 12B, a plurality of light emitting diodes (LEDs) 410 having a light output in a range of 400 nm to 365 nm may be referred to the lens insertion hole 430 of the case 420. As installed so as to have a circular shape around it, ultraviolet rays are irradiated from the edge portion of the lens 520 inserted into the lens insertion hole 430.

The control device controls the driving of the devices and receives the image pickup signal captured by the camera 500 to determine whether the welding is defective or to extract data such as the number of inspections, the number of defects, and the defective rate by a predetermined program. Processing to display the captured image.

The transfer robot 800 is configured to be movable back and forth, left and right and up and down so as to load and unload the rim 20 on the ignition jig 210. FIGS. 1, 9A, 9B, 10 and As shown in Figure 11 between the front and rear guide rail device 810 and the front and rear guide rail device 810 is installed on the upper side of the support frame 110 installed in a "Π" shape on both sides of the frame 100, The left and right guide rail device 820 to be rolled up, and configured to be upright on the left and right guide rail device 820, the Shanghai transport device 830 to be transported in the vertical direction, and the lower end of the Shanghai transport device 830 And a clamping mechanism 840 for clamping and unclamping 20, and a driving device 850 for driving the respective devices.

Meanwhile, as illustrated in FIGS. 9A and 9B, a fluorescence particle supply device 300 for supplying a dispersant containing fluorescence to the welding portion 22 of the rim 20 seated on the electromagnet yoke 210a. Bar is configured, the fluorescence powder supply device 300 is a magnetic powder tank (not shown) in which the fluorescence is accommodated, and the welding portion 22 of the fluorine powder supplied from the magnetic powder tank via a supply hose 22 It is composed of a spray nozzle 310 is installed on the frame 100 in contact with each of the electromagnet yoke (210a) to be injected into the).

1, 9A and 10, the left and right movement paths of the electromagnet yoke 210a are rotated by rotating the rim 20 caught by the electromagnet yoke 210a so that the welding portion is positioned at the upper center. A plurality of rim rotating device 610 is configured at the lower side, and the welding portion of the rim 20 rotated by the rim rotating device 610 is located in the upper center to detect this rotational operation of the rim rotating device 610 Welding part sensor 620 is configured to stop the.

In addition, the rim rotation device 610 may be applied in various forms if the structure that can rotate the rim in addition to the structure shown in Figures 9a and 10, the installation position of the welding part sensor 620 is Since the welding part of the rim should detect the state located in the upper center, the upper part is installed in the upper central part near the installation position of the injection nozzle 310 of the fluorescent powder supply device 300 which is installed to inject the fluorescent powder into the welding part. In addition, the welding part sensor 620 is configured as a sensor that can detect the changed color of the welded part when the rim 20 is welded to generate a detection signal.

As shown in Figure 9a is a rim loading rail is a rim supplied from the rim manufacturing line side is moved and loaded in the inspection standby state, in this embodiment is configured to form a passage through which the rim is moved by the plate member, The present invention is not limited thereto, and if the structure of the rim is stably and accurately performed, it may be variously configured, and may be configured by a transfer device such as a conveyor.

As described above, the method and system for the defect inspection of the steel steel rim according to a preferred embodiment of the present invention is shown in accordance with the above description and drawings, but this is merely described for example and does not depart from the spirit of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope.

According to the method and system for defect inspection of automobile steel rim according to the present invention, the rim is loaded and unloaded to the ignition jig by a transfer robot and the welding operation of the rim is carried out by performing a photographing operation for the inspection by the inspection robot. The defect can be accurately and quickly performed, the reliability of the welding inspection is secured, and the workability of the welding inspection is improved. And even if a separate dark room is not provided, since defects formed on the welded portion of the rim on the rim manufacturing line of the wheel can be easily and quickly inspected, flow work in the manufacturing process is possible, thereby improving productivity.

Claims (10)

In the method for defect inspection of automobile steel rim which performs rim welding inspection of wheel by magnetization inspection method, And a welding test is performed by seating an inner surface of the rim onto a coiled electromagnet yoke and supplying a current to magnetize the rim. The method of claim 1, The welding defect inspection method may include a loading step of loading a rim targeted for welding inspection into an electromagnet yoke for welding inspection; A fluorescent powder injection step of spraying a dispersant containing fluorescent particles onto the welded portion of the rim loaded by the loading step; A magnetization step of applying electric power to the electromagnet yoke so that the rim in which the fluorescence is injected is magnetized by the fluorescence powder injection step; A welding inspection step of performing a welding inspection by simultaneously irradiating ultraviolet rays to the welding portion of the magnetized rim by the magnetization step; Determination of welding defect by the predetermined program by receiving the imaging signal photographed by the welding inspection step, and welding defect determination step of extracting and processing the data such as the number of inspection, the number of defects and the defective rate and display the captured image includes Method for the failure inspection of the steel steel rim, characterized in that made. The method of claim 2, The welding inspection step of the automotive steel rim, characterized in that the ultra-low light CCD camera equipped with a lens for blocking ultraviolet rays at the end of the robot arm and the ultraviolet irradiation device is performed by the inspection robot installed so that the dark room function is given by the shield member. Method for defect inspection. The method of claim 2 or 3, Rotating the rim caught in the electromagnet yoke by the loading step, if the welding position is detected in the upper center position by the welding part sensor to detect the fluorescence magnetic powder for the defect inspection of the automobile steel rim Way. In the system for the failure inspection of the steel rim of the automobile to perform the rim welding defect of the wheel by the magnetization inspection method, And a ignition unit configured to magnetize the rim by a current supplied by the coil to which the rim is inserted, the inner surface of which is mounted, and the coil is selectively supplied. The method of claim 5, wherein The ignition unit is an electromagnet yoke that is seated on the rim is the target of the welding inspection; A plurality of ignition jig provided with a power supply for selectively energizing the current wound in the coil wound around the electromagnetic yoke; The ignition jig is spaced apart at regular intervals, the system for defect inspection of the automobile steel rim, characterized in that consisting of a slider slidably installed on the frame so that the position of the ignition jig is adjusted in the left and right directions. The method of claim 6, The electromagnet yoke is provided with a pair of supporting members spaced apart at regular intervals in parallel, the coil is wound on its outer surface, And a magnetizing member installed at an end of the supporting member and having a seating groove formed in the same shape so that the inner circumferential surface of the rim is in close contact with the rim in a stable manner. The method according to claim 6 or 7, An inspection robot equipped with an ultraviolet irradiation device and a camera is mounted at the end of the robot arm so as to irradiate ultraviolet rays to the welded portions of the rim magnetized on the electromagnet yoke and perform a photographing operation. System for defect inspection of steel rims. The method of claim 8, The camera is composed of an ultra-low light CCD camera equipped with a lens for blocking ultraviolet rays, and the ultraviolet irradiation device is installed in contact with the lens while a shielding member for blocking an outer tube is configured to provide a dark room function. , The ultraviolet irradiation device is configured to arrange a plurality of light emitting diodes (LEDs) having a light output in the range of 400nm to 365nm to form a circular shape for the defect inspection of the automotive steel rim, characterized in that the installation is in contact with the edge of the lens system. The method of claim 8, A plurality of rim rotating devices configured under the left and right movement paths of the electromagnet yoke to rotate the rim caught by the electromagnet yoke so that the welded portion is positioned at the upper center; A welding part detecting sensor for stopping the rotation operation of the rim rotating device by detecting that the rim rotated by the rim rotating device is located at the upper center of the welding part; A transfer robot configured to be movable back and forth, left and right and up and down to load and unload the rim onto the ignition jig; A rim loading rail to which the rim is moved and placed in a test standby state; And a fluorescent particle supply device for supplying a dispersant containing fluorescent particles to the welding portion of the rim seated on the ignition jig.

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