Method and system for indicating paint defects on automobile production lines

Abstract

To provide a method and system for displaying paint defects in an automobile manufacturing line, which allow for recognizing whether a detected defect has been repaired.SOLUTION: A paint defect display method for an automobile manufacturing line is provided, the method involving detecting a paint defect D of an automobile body B together with a defect position, displaying the detected paint defect D at the defect position on an image showing a surface of the automobile body, and inputting measures taken for the detected paint defect. A paint defect for which measures are entered will disappear from or be displayed in a different manner on the image showing the surface of the automobile body.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a method and system for indicating paint defects in an automobile production line. [Background technology]

[0002] A paint inspection device is known that uses an optical unit including a laser light source to inspect the metallic base painted on an automobile body for uneven brightness and displays the inspection results on a monitor (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-75848 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned conventional technology only displays the paint defects detected by the paint inspection device on a monitor, which has the problem that it is not possible to confirm whether the paint defects have been corrected, for example, when they need to be corrected.

[0005] SUMMARY OF THE INVENTION An object of the present invention is to provide a method and system for indicating paint defects in an automobile production line, which can determine whether or not a detected paint defect has been remedied. [Means for solving the problem]

[0006] The present invention relates to an automobile production line having a defect detection process and a plurality of defect repair processes, In the defect detection step, a paint defect on the automobile body is detected together with the defect position; In each of the plurality of defect repairing steps, To the worker who corrects the painting defect, Assign a scope of remediation for the defects to be remediated; In each of the plurality of defect repair processes, The person who repairs the paint defect in the defect repair process Assigning wirelessly enabled wearable devices, In each of the defect repair processes, an image showing the surface of the automobile body is displayed on a display of each of the assigned wearable devices, and the defect position on the image is indicated as follows: Among the coating defects detected in the defect detection process, Displaying only the detected coating defects included in each of the assigned correction ranges; In each of the defect correction processes, measures for the detected coating defects are taken. In the database The problem is solved by inputting the information and stopping or changing the display format of the paint defects for which the measures have been input on the image showing the surface of the automobile body. [Effects of the Invention]

[0007] According to the present invention, for paint defects for which measures have been input for a detected paint defect, the display on the image is stopped or the display format is changed, so it is possible to recognize whether or not the detected paint defect has been addressed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a process diagram showing a painting completion inspection process to which the painting defect indication method and system for an automobile production line according to the present invention is applied. [Figure 2] The upper figure is a side view showing an example of the arrangement of a defect detection device (pattern irradiator and camera) according to the present invention, and the lower figure is a front view showing an example of the movement of the light and dark pattern projected on the pattern irradiator. [Figure 3] 1 is a block diagram showing an example of a method for detecting a coating defect according to the present invention. [Figure 4] 1 is a front view showing an example of a display device according to the present invention. [Figure 5] 5 is a diagram for explaining the display function of the display device of FIG. 4. FIG. [Figure 6] FIG. 2 is a plan view of a roof panel and a hood panel showing an example of an auxiliary line according to the present invention. [Figure 7]1 is a flowchart showing the procedure of a painting completion inspection process to which the painting defect indication method and system for an automobile production line according to the present invention is applied. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, with reference to the drawings, an embodiment of the present invention will be described. An automobile production line is primarily composed of a press-forming line, a body assembly line (also called a welding line), a painting line, and a vehicle assembly line (also called an outfitting line). The paint defect indication method and system for an automobile production line of the present invention can be applied to either a painting line or a vehicle assembly line. Furthermore, the paint defect indication method and system for an automobile production line of the present invention can be applied to a painting line, not only to a coating completion inspection process after topcoat painting is completed, but also to a process after electrodeposition painting is completed and a process after intermediate coating is completed. For example, a painting line using a three-coat, three-bake painting method, which involves electrodeposition painting, intermediate coating, and topcoat painting, includes an electrodeposition process, a sealing process, an intermediate coating process, a water sanding process, a topcoat process, and a coating completion inspection process. The embodiment described below is an example in which the present invention is applied to a coating completion inspection process after topcoat painting is completed.

[0010] Figure 1 is a process diagram showing a painting completion inspection process 1 to which a paint defect indication method and system for an automobile production line is applied. In the figure, an automobile body B is loaded onto a painting cart (not shown) and pulled by a floor conveyor CV1, and is transported at a constant speed from the left side to the right side of Figure 1. Although not shown, a topcoat drying oven is provided on the left side of Figure 1, and a transport device to the vehicle assembly line is provided on the right side of Figure 1.

[0011] The paint completion inspection process 1 shown in Figure 1 includes a defect detection process 11 that detects paint defects that occur on the exterior surface of an automobile body B, a first defect repair process 12 that mainly repairs paint defects within the line, and a second defect repair process 13 that mainly repairs paint defects outside the line. Note that paint defects in this embodiment include surface irregularity defects such as dust particles, popliteal particles, threads, and cissing. The paint defect is shown as paint defect D in Figure 4.

[0012] The defect detection process 11 is a process for detecting whether or not there is a paint defect on the outer panel of the transported automobile body B, and in this embodiment, a defect detection device 2 is provided that automatically detects uneven defects that have occurred on the outer panel surface of the automobile body B. The defect detection device 2 of this embodiment includes a pattern irradiator 21, a camera 22, a computer 23 having the functions of an image processor, a judger, and a controller that identifies the position of the defect, and a robot R.

[0013] The pattern irradiator 21 is composed of a liquid crystal display, an organic EL display, or the like, and irradiates a light and dark pattern, in which light and dark areas appear alternately periodically in a plane perpendicular to the irradiation direction, onto the exterior surface of the automobile body B, and moves the light and dark pattern in the direction in which the light and dark areas are aligned by one or more periods of a pair of light and dark areas. The upper diagram of Fig. 2 is a side view showing an example of the arrangement of the pattern irradiator 21 and the camera 22 relative to the exterior surface of the automobile body B, and the lower diagram of Fig. 2 is a front view showing an example of the movement of the light and dark pattern projected on the pattern irradiator 21.

[0014] The light-dark pattern of this embodiment is a continuous striped pattern, consisting of a pair (one cycle) of rectangular light areas Pa extending vertically on the screen and rectangular dark areas Pb also extending vertically on the screen. When inspecting for paint defects, this light-dark pattern is moved in the direction in which the light areas Pa and dark areas Pb are aligned, i.e., left and right in the lower diagram of FIG. 2. The speed of this movement is set according to the photographing speed (number of photographed frames per unit time, fps) of the camera 22. In this embodiment, when inspecting for paint defects, the light areas Pa and dark areas Pb are moved at least one cycle, and preferably two or more cycles, on the outer panel surface of one automobile body B.

[0015] The photographing device 22 is composed of a CCD camera or the like, and is assembled together with the pattern irradiator 21 so that the light of the light and dark pattern irradiated from the pattern irradiator 21 reflected from the outer panel surface of the automobile body B is incident at a predetermined angle, as shown in the upper diagram of Fig. 2. The photographing device 22 then takes multiple images of the light and dark pattern projected by the pattern irradiator 21 onto the outer panel surface of the automobile body B in accordance with the movement of the light and dark pattern of the pattern irradiator 21. The images of the light and dark pattern taken by the photographing device 22 are output to a computer 23 having the functions of an image processor, a judger, and a controller that identifies the position of a defect.

[0016] The computer 23 functions as an image processor that extracts the maximum and minimum brightness values ​​at each position from the multiple images captured by the camera 22 to generate maximum and minimum brightness images, a determiner that calculates the difference between the maximum and minimum brightness images and determines whether the brightness difference at each position is within a predetermined range, and a controller that identifies the position of the defect. Specifically, image processing software, determination software, and position identification software are installed, and predetermined processing is performed according to the procedures of these software by computing units such as a CPU, ROM, and RAM.

[0017] Robot R is equipped with a pattern irradiator 21 and a camera 22 attached to the tip of its hand, and a teaching program is installed so that the pattern irradiator 21 and the camera 22 are transported so as to assume a predetermined posture relative to the outer panel surface of automobile body B. Figure 1 shows a total of four robots R, two of which are placed on each side of automobile body B. These four robots R detect paint defects present on five surfaces of automobile body B (hood, roof, trunk lid (back door), left and right body sides).

[0018] FIG. 3 is a block diagram showing an example of a paint defect detection method according to the present invention. As shown in FIG. 3, a computer 23 having an image processing program installed thereon captures images IM1 captured by a camera 22 and extracts the maximum brightness at each position from the multiple captured images IM1 to generate a maximum brightness image IM2. Here, to extract the maximum brightness at each position from the captured images IM1, the brightness of each pixel (or a pixel group, which is a collection of a predetermined number of pixels) in each captured image IM1 is detected, and the pixels showing the maximum brightness for each pixel are combined into a single image. Also, as shown in FIG. 3, the computer 23 extracts the minimum brightness at each position from the multiple captured images IM1 to generate a minimum brightness image IM3. Here, to extract the minimum brightness at each position from the captured images IM1, the brightness of each pixel (or a pixel group, which is a collection of a predetermined number of pixels) in each captured image IM1 is detected, and the pixels showing the minimum brightness for each pixel are combined into a single image.

[0019] After the minimum brightness image IM3 is synthesized from the multiple captured images IM1 in this way, a subtraction process is performed to determine the brightness difference at each position (each pixel) between the minimum brightness image IM3 and the maximum brightness image IM2, which was synthesized simultaneously or laterally, to generate a subtraction image IM4. Each pixel (or a pixel group consisting of a predetermined number of pixels) in the subtraction image IM4 is then scanned vertically and horizontally to measure the brightness of each pixel (corresponding to a position on the surface to be inspected) and determine whether it is equal to or greater than a predetermined threshold. If the measured brightness is below the threshold, it is determined that a concave-convex defect exists at that position. This determination is based on diffuse reflection from the concave-convex surfaces. That is, due to diffuse reflection from the concave-convex surfaces, the brightness of an image of the pattern of the bright areas Pa exhibits a gray value between white and black, and the brightness of an image of the pattern of the dark areas Pb also exhibits a gray value between black and white, so the difference in brightness decreases toward zero.

[0020] When a position where the difference is less than the threshold is detected by scanning each pixel (each position) in the difference image IM4, that position is stored and the defect position is identified. The defect detection results are compiled as defect data for one automobile body B when the defect detection for the entire automobile body B is completed, and output to the production management device 3 in Figure 1. The defect position in the automobile body B can be identified by acquiring the position of the outer panel surface of the automobile body B moved by the robot R from the controller of the robot R and comparing this position with the defect position determined by the computer 33.

[0021] The defect detection device 2 provided in the defect detection process 11 is not limited to the above-mentioned one, and other defect detection devices that automatically detect paint defects can also be applied. Furthermore, it is not limited to devices that automatically detect paint defects, and a defect detection device that detects paint defects in cooperation with an operator may also be used. For example, since the so-called interior surfaces of an automobile body, such as the door opening, back door opening, and engine compartment, have complex shapes, the interior surfaces may be visually inspected by an operator, and the exterior surfaces may be inspected mechanically (by an automatic defect detection device).

[0022] Returning to FIG. 1 , the first defect repair process 12 is a process for repairing paint defects within the line, and for this purpose, two workers W are assigned to an automobile body B corresponding to one takt time. The production management device 3 records the ordered vehicle together with its specifications, and when the vehicle begins production on the automobile production line, the production of that vehicle is managed as tracking data in all of the body assembly line, painting line, and vehicle assembly line. Paint defects detected by the defect detection device 2 are then associated with this tracking data along with their defect locations. Therefore, when an automobile body B is carried into the first defect repair process 12, the paint defects detected on the automobile body B at that time are output from the production management device 3 to the display device 4 via the wireless router 31 along with the defect locations, allowing each worker W to recognize the paint defects on the automobile body B that has arrived in his or her work area.

[0023] The display device 4 of this embodiment is a so-called wearable small computer that can be worn by the worker W on a part of the body, such as the arm, and includes a display 41. In the first stage of the first defect repair process 12 shown in FIG. 1 , two workers W repair paint defects on the left and right sides of the automobile body B. In the subsequent stage of the first defect repair process 12, two other workers W repair other paint defects on the left and right sides of the automobile body B. In this embodiment, the first defect repair process 12 is provided in two stages, but one stage or three or more stages may be provided as needed. Furthermore, the first defect repair process 12 is a process in which the worker W repairs paint defects detected by the defect detection device 2 within the production line. However, the worker W may also determine whether the paint defects detected by the defect detection device 2 are correct or visually detect paint defects that could not be detected by the defect detection device 2.

[0024] The second defect repair process 13 is a process for mainly repairing paint defects outside the line, and is located on the bypass line of the floor conveyor CV1 downstream of the first defect repair process 12. If a worker W visually checks a paint defect in the first defect repair process 12 and determines that the paint defect is "unrepairable" and registers it, the automobile body B is transported from the floor conveyor CV1 to CV2, where the paint defect is repaired over a relatively long period of time. For this reason, the floor conveyor CV2 does not transport the automobile body at a constant speed, but is manually transported at the desired timing. The second defect repair process 13 may also be a so-called off-line repair space without a floor conveyor.

[0025] 4 is a front view showing an example of a display device 4 according to the present invention. The display device 4 of this embodiment has a display 41 on one main surface, and is equipped with a defect display function for displaying paint defects and a correction result input function for inputting correction results for the paint defects.

[0026] The defect display function of the display device 4 is a function that displays selected vehicle information, plots and displays defects of the selected vehicle on a three-dimensional vehicle that has been set based on defect database information, and further displays information on the selected defect and an enlarged display on the sub-parts screen. A worker W wearing the display device 4 can identify the defect on the actual vehicle by visually checking the defect displayed on the display 41 and then perform the subsequent work.

[0027] The display device 4 also has a correction result input function that registers the correction information and results of a selected defect in a database, and corrects the defect level and type of the selected defect and registers the result in the database. When the worker W corrects a paint defect identified on an actual vehicle, or determines that correction is not necessary or is impossible to correct, the worker W can register the defect correction information and results in the database. Furthermore, by visually checking the paint defect detected by the defect detection device 2, the defect level and type can be identified, and this information can also be corrected.

[0028] In addition to these defect display functions and correction result input functions, the display device 4 of this embodiment also has functions to register and display auxiliary lines, to zoom in, zoom out, and move the display, to switch the viewpoint of the image display, to set a correction range for each work area (or worker W) and display or input corrections for only defects in the set correction range, to set a work area for each display device 4 and perform display based on the set work area, to set a worker for each work area and associate defect correction information with the worker, to switch defect selection by touching the defect switching button and defect symbol, and to register three-dimensional vehicle data and associated information used for image display. The configuration of the display device 4, including these functions, will be described below.

[0029] As shown in Fig. 4, the display device 4 of this embodiment displays a main screen 42 on the left side and a sub-parts screen 43 on the right side. The selected vehicle information is displayed in an upper portion 421 of the main screen 42. This vehicle information is output from the production management device 3. The vehicle to be displayed on the display device 4 can be selected by the worker W operating the display device 4, but while the line is in operation, the vehicle information of the automobile body B that has arrived in the work area of ​​the worker W is automatically selected and displayed based on the tracking data of the production management device 3.

[0030] The central portion 422 of the main screen 42 displays five views of the automobile body B, including a plan view, a front view, a rear view, a right side view, and a left side view, and auxiliary lines L and paint defects D are displayed superimposed on these images. In addition, the lower portion 423 of the main screen 42 displays the defect level and defect type of the paint defect D. The defect level is, for example, a predetermined N-level evaluation, and the defect types include dust particles, popliteal particles, thread waste, and cratering. The numbers in parentheses displayed to the right of the defect type indicate the selected defect number and the total number of defects registered in the work area of ​​that worker W. For example, 1 / 3 means that the total number of defects registered in the work area of ​​that worker W is 3, and the currently selected defect number is 1.

[0031] By touching any of the five-view drawings displayed in the center 422 of the main screen 42, the sub-assembly part is displayed on the sub-parts screen 43. Figure 4 shows the case where the left side of the hood is touched on the main screen 42.

[0032] The sub-assembly part selected on the main screen 42 is displayed in the center of the sub-parts screen 43. When the worker W pinches out on the sub-parts screen 43 (moves two fingers apart), the displayed sub-assembly part is enlarged, and conversely, when the worker W pinches in on the sub-parts screen 43 (moves two fingers closer together), the displayed sub-assembly part is reduced. In addition, when the worker W scrolls the sub-parts screen 43, the display screen is scrolled in the direction of the finger movement.

[0033] "Previous" and "Next" touch buttons are displayed on the upper left and right sides 431 of the sub-parts screen 43, and touching "Previous" transitions to vehicle information for the preceding vehicle, and touching "Next" transitions to vehicle information for the following vehicle. Also, "Previous" and "Next" touch buttons are displayed on the lower left and right sides 432 of the sub-parts screen 43, and touching "Previous" moves the highlighting (displayed by encircling with a red circle, etc.) of the multiple paint defects D to the previous paint defect D, and touching "Next" transitions to the next paint defect D.

[0034] The bottom 433 of the subpart screen 43 displays touch buttons for "Corrected," "Cannot be corrected," and "No correction required." This is the correction result input function described above. When a worker completes the correction of a highlighted paint defect D, they touch "Corrected." However, if the worker checks the actual vehicle and determines that the paint defect D cannot be corrected within the production line, they touch "Cannot be corrected." If the paint defect D is detected as a paint defect D but the worker checks the actual vehicle and determines that no correction is required, they touch "No correction required." When "Corrected," "Cannot be corrected," or "No correction required" is entered for a paint defect D, the display of that paint defect D is discontinued, or the display format is changed to indicate that the entry has been made. Changing the display format includes changing the color of the paint defect display or the format of the highlight mark. In contrast, if none of "Corrected," "Cannot be corrected," or "No correction required" is entered for a paint defect D, the display of that paint defect D continues even after it has passed the work area of ​​the responsible worker W.

[0035] Eight arrow-shaped touch buttons are displayed on the outer periphery 434 of the sub-parts screen 43, and when one of the arrow-shaped touch buttons is touched, a three-dimensional image viewed from the direction of the arrow is displayed. Figure 5 shows an example of a three-dimensional image displayed when each arrow-shaped touch button is touched, as a balloon. This is because if a paint defect on the actual vehicle cannot be found or is difficult to find, changing the line of sight can make it easier to find.

[0036] The display device 4 of this embodiment uses an auxiliary line display function to display an auxiliary line L superimposed on the image of the five-view drawing displayed on the main screen 42 and the image of the sub-assembly part displayed on the sub-part screen 43. The auxiliary line L in this embodiment is preferably a straight line that passes through a characteristic point of the automobile body B and follows the front-to-rear, left-to-right, or up-to-down direction of the automobile body. Furthermore, it is preferable that this characteristic point be an end point of the sub-assembly part, a character line, a hole, a notch, the center point of an arch shape, or the like, which serves as a landmark for confirming an arbitrary position and is easily distinguishable from others. Figure 6 is a plan view of a roof panel and a hood panel showing an example of an auxiliary line.

[0037] In the case of the roof panel shown in the left diagram of FIG. 6, auxiliary line L1 extending in the front-rear direction of the vehicle and passing through the center of the vehicle in the left-right direction is a straight line passing through a characteristic point, the center of the automobile body B in the left-right direction. Further, auxiliary line L2 extending in the left-right direction of the vehicle is a straight line passing through a characteristic point, where both ends of the auxiliary line L2 coincide with the rear ends of the rear door. Furthermore, auxiliary line L3 extending in the left-right direction of the vehicle is a straight line passing through a characteristic point, where both ends of the auxiliary line L3 coincide with the upper ends of the center pillar. When the roof panel is visually recognized, these auxiliary lines L1 to L3 serve as landmarks for recognizing relative positions.

[0038] Similarly, in the case of the hood panel of FIG. 6, auxiliary line L4, which extends in the front-rear direction of the vehicle and passes through the center of the vehicle in the left-right direction, is a straight line that passes through a characteristic point, the center of the vehicle body B in the left-right direction. Furthermore, auxiliary line L5, which extends in the left-right direction of the vehicle, is a straight line that passes through a characteristic point, where both ends of the auxiliary line L5 coincide with the center of the front wheel arch. Furthermore, auxiliary line L6, which extends in the left-right direction of the vehicle, is a straight line that passes through a characteristic point, where both ends of the auxiliary line L6 coincide with the notch in the front fender. When the hood panel is visually recognized, these auxiliary lines L4 to L6 serve as landmarks for recognizing relative positions.

[0039] Next, the operation will be described. Figure 7 is a flowchart showing the work procedure in the painting completion inspection process of this embodiment. First, in step ST1, when an automobile body B arrives at the defect detection process 11 of the painting completion inspection process 1, the vehicle ID is recognized using tracking data from the production management device 3. Then, in step ST2, the defect detection device 2 automatically detects paint defects present on the outer panel surface of the automobile body B, i.e., surface irregularity defects such as dust particles, popliteal particles, thread debris, and repelling, and in step ST3, the presence or absence of paint defects and their locations are identified, and the paint defects and their locations are output from the computer 23 to the production management device 3, where they are recorded in association with vehicle information.

[0040] When the automobile body B that has passed through the defect detection process 11 arrives at the stage preceding the first defect repair process 12, in step ST4, the paint defects D detected on the automobile body B, together with the defect positions, are displayed on the display devices 4 worn by the four workers W positioned at the stages preceding and following the first defect repair process 12 via the wireless router 31 from the production management device 3. At this time, a preset auxiliary line L is also displayed superimposed on the image of the automobile body B.

[0041] In step ST5, the four workers W, who are assigned to each of the four workmen W stationed before and after the first defect repair process 12, compare the paint defect D displayed on the display device 4 with the paint defect on the actual vehicle, confirm the defect level and type, and correct it as necessary before registering it. If the paint defect can be corrected within the line and the correction is complete, the worker touches the "Corrected" touch button. If the paint defect is determined to be minor and not requiring correction, or to be a false positive and not requiring correction, the worker touches the "No Correction Required" touch button. If the paint defect cannot be corrected within the line and the worker determines that correction is required in the second defect repair process 13, the worker touches the "Uncorrectable" touch button.

[0042] Once the takt time for worker W has elapsed, step ST6 determines whether or not all correction results, such as "corrected," "uncorrectable," or "no correction required," have been entered for the painting defects detected in step ST2 and assigned to each worker W. If correction results have not been entered for the assigned painting defects, it means that the work of that worker W has not been completed, so the process proceeds to step ST7, where transportation to the vehicle assembly line, which is the process following the painting completion inspection process 1, is prohibited. This prevents worker W's work mistakes from being overlooked.

[0043] On the other hand, in step ST6, if the correction results of "corrected," "uncorrectable," or "no correction required" have all been input for the painting defects detected in step ST2 and assigned to each worker W, the process proceeds to step ST8. In step ST8, if the input result is "corrected" or "no correction required," the process proceeds to step ST10, and if the input result is "uncorrectable," the process proceeds to step ST9.

[0044] In step ST9, the automobile body B for which the result "cannot be corrected" has been entered is transported to the second defect correction process 13, where the paint defects that cannot be corrected within the line are corrected, and the result is entered as "corrected."

[0045] In step ST10, for the paint defect for which "corrected" or "no correction required" has been input, the display on the display device 4 is stopped. Then, in step ST, transportation to the vehicle assembly line is permitted.

[0046] As described above, the paint defect display method and system for an automobile production line of this embodiment detects paint defects D on automobile bodies B along with their locations, displays the detected paint defects D at the defect locations on an image showing the surface of the automobile body B, and when inputting measures to address the detected paint defects, stops displaying the paint defects D for which measures have been input on the image showing the surface of the automobile body B. This allows the worker W to easily recognize whether or not the detected paint defects have been addressed.

[0047] Furthermore, according to the paint defect display method and system for an automobile production line of this embodiment, paint defects D on an automobile body B are detected along with their locations, and the detected paint defects D are displayed at the defect locations on an image showing the surface of the automobile body B. When a corrective action to address the detected paint defect is input, the display format on the image showing the surface of the automobile body B is changed for the paint defect D for which the corrective action has been input. This allows the worker W to easily recognize whether or not the detected paint defect has been addressed. In addition, because the display continues even after the corrective action has been input, the same worker can take the corrective action again, or another worker can double-check the action.

[0048] Furthermore, according to the paint defect display method and system for an automobile production line of this embodiment, the paint defect D displayed on the image showing the surface of the automobile body B continues to be displayed until the above-mentioned measures are input, so that the worker W can more easily recognize whether or not the detected paint defect has been addressed.

[0049] Furthermore, according to the paint defect display method and system for an automobile production line of this embodiment, the action can be selected from among corrected, no correction required, or uncorrectable, so that the worker W can more easily recognize whether or not the detected paint defect has been corrected.

[0050] Furthermore, according to the paint defect display method and system for an automobile production line of this embodiment, an image showing the surface of the automobile body including the paint defect and the auxiliary line is displayed on the display of the wirelessly-enabled wearable display device, so that the worker W can recognize the image without significantly changing his or her line of sight, which makes it even easier for the worker W to recognize whether or not the detected paint defect has been addressed. [Explanation of symbols]

[0051] 1...Painting inspection process (automobile production line) 11...Defect detection process 12...First defect repair process 13...Second defect repair process 2...Defect detection device 21...Pattern irradiator 22...camera 23...Computer 3...Production control equipment 31...Wireless router 4...Display device 41...Display 42...Main screen 421...Upper 422...Central part 423...Lower 43...Subparts screen 431…Top left and right 432…Lower left and right 433...lower part 434...Outer periphery B...Car body CV1, CV2...Floor conveyor R...Robot W: Worker D...Paint defect L,L1~L6…auxiliary line

Claims

1. In an automobile production line that has a defect detection process and multiple defect repair processes, In the defect detection step, a paint defect on the automobile body is detected together with the defect position; Before each of the plurality of defect repair processes, a repair range of the defect to be repaired is assigned to an operator who will repair the coating defect in each of the defect repair processes; assigning to each of the plurality of defect repair processes a wearable device capable of wireless communication of a worker who repairs a paint defect in the defect repair process; In each of the defect repair processes, an image showing the surface of the automobile body is displayed on a display of each of the assigned wearable devices, and only the detected paint defects that are included in each of the assigned repair ranges among the paint defects detected in the defect detection process are displayed at the defect positions on the image; A paint defect display method for an automobile production line, in which in each defect repair process, measures to be taken for the detected paint defects are entered into a database, and for paint defects for which the measures have been entered, the display on the image showing the surface of the automobile body is stopped or the display format is changed.

2. 2. The method for displaying paint defects in an automobile production line according to claim 1, wherein the paint defects displayed on the image showing the surface of the automobile body continue to be displayed until the corrective action is input.

3. In an automobile production line having a defect detection process and a plurality of defect repair processes, a repair range of a defect to be repaired is assigned to each of the plurality of defect repair processes, a defect detection device provided in the defect detection process for detecting paint defects on the automobile body and their locations; a wearable device capable of wireless communication, which is assigned to each of the plurality of defect repair processes, and which inputs measures to be taken for the paint defects and displays the paint defects detected by the defect detection device on a display; an image showing the surface of the automobile body is displayed on a display of each of the wearable devices assigned to each of the defect repair processes, and only the detected paint defects detected in the defect detection process that are included in each of the assigned repair ranges are displayed at the defect positions on the image; A paint defect display system for an automobile production line that stops displaying or changes the display format on an image showing the surface of the automobile body for paint defects for which the action has been input by the wearable device.

Images