JP6831695B2 - Painting equipment and painting method - Google Patents

Description

The present invention relates to a coating facility and a coating method in which the same paint is applied to a metal work and a resin work to be integrally assembled, and then individually baked and dried.

For example, vehicles such as automobiles tend to switch from conventional metal workpieces to resin workpieces from the viewpoints of weight reduction and design. In the painting process, the thermal strength and the expansion coefficient of the metal material and the resin material are different. Therefore, in separate processes, a special paint is applied and then a baking and drying process is performed.

By the way, when paint is applied to a metal work and a resin work in separate processes and then baked and dried, the finish of both works is likely to have a hue shift, and the paint is adjusted for color matching. And hue need to be confirmed.

Therefore, for example, in Patent Document 1 (Patent No. 3031747), a technique of painting a metal vehicle body and a resin bumper to be assembled to the vehicle body in the same process and then baking and drying them separately. Is disclosed.

Japanese Patent No. 3031747 Japanese Unexamined Patent Publication No. 7-88422

In the technology disclosed in the above-mentioned documents, since the baking and drying treatment of the painted surface on the metal body body and the resin bumper is performed in separate processes, it is necessary to confirm the hue when assembling, which is complicated. Work is required.

Therefore, for example, in Patent Document 2 (Japanese Unexamined Patent Publication No. 7-88422), after painting the metal body and the resin bumper on the same line, the metal body and the resin bumper are baked. A technique for preventing color difference defects by simultaneously baking and drying in a drying furnace is disclosed.

By the way, in the technique disclosed in Patent Document 2, when a metal body body and a resin bumper having significantly different heat capacities are passed through the same baking drying furnace to perform baking drying, the inside of the baking drying furnace is used. It is necessary to set the baking drying temperature of the body to either the metal body or the resin bumper.

For example, when the temperature of the baking / drying furnace is set corresponding to the metal body of the vehicle body, the resin bumper is subjected to the baking / drying process at an excessive temperature, so that there is a possibility of thermal deformation. Therefore, it is necessary to bake and dry the resin bumper while maintaining a posture in which it is difficult to be thermally deformed by using a jig or the like. However, when baking and drying in a baking oven, if the orientation is changed to prevent thermal deformation of the resin bumper, baking and drying is performed with the resin bumper attached to the metal body. Compared to the case, there is a disadvantage that the color difference defect of the mating portion with the metal vehicle body becomes conspicuous.

In view of the above circumstances, in view of the above circumstances, even if a metal work and a resin work having different heat capacities are baked and dried almost at the same time, the resin work is not thermally deformed and a color difference defect occurs when assembling. It is an object of the present invention to provide a coating facility and a coating method capable of obtaining high production efficiency without any problems.

The first aspect of the present invention is a coating process section for collectively applying the same paint to a metal work and a resin work attached to the metal work, and the metal work and the resin work to which the same paint is applied. a metal workpiece baking and drying process unit, and the resin workpiece baking and drying process unit for baking and drying the workpiece at different temperatures, a work assembly unit to assembly with the metal workpiece after baking drying and the resin workpiece on line In the coating equipment provided in the above, a metal work hue detection process unit that detects the hue of the metal work that has been baked and dried, and the resin work that is provided in the middle of baking and drying and is baked and dried for a predetermined time. The color difference is detected from the resin work hue detection process unit that detects the hue and the both hues detected by the both hue detection process units , and evaluates whether or not the color difference is within a preset allowable range. A control unit having a detection and evaluation process unit is further provided, and when the color difference detection and evaluation process unit determines that the color difference is within a preset allowable range, the work assembly unit determines that the metal work and the resin and manufacturing work Ru is assembled.

The second aspect of the present invention is to apply the same paint to the metal work and the resin work to be attached to the metal work in a batch, and then apply the same paint to the metal work and the resin work. In a coating method in which the metal work and the resin work are assembled by baking and drying at different temperatures, the hue of the metal work after baking and drying is detected, and the metal work is baked and dried for a predetermined time. The hue of the resin work is detected, the hue difference between the two hues is detected, it is determined whether or not the color difference is within the preset allowable range, and it is determined that the color difference is within the allowable range. If so, the metal work and the resin work are assembled.

According to the present invention, the color difference between the hue of the individually baked and dried metal work and the hue of the resin work is detected, and if this color difference is within a preset allowable range, the metal work is concerned. And the resin work are assembled, so even if the metal work and the resin work with different heat capacities are individually baked and dried, there is no color difference defect or thermal deformation when assembling, which is high. Production efficiency can be obtained.

Schematic configuration of painting equipment Schematic configuration of the baking dry adjustment calculation unit Flow chart showing the painting line control processing routine (Part 1) Flow chart showing the painting line control processing routine (Part 2) Flow chart showing the body baking drying process / inspection routine Flowchart showing bumper baking drying process / inspection routine Characteristic diagram showing color difference tolerance

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the vehicle body 2 is shown as an example of the metal work, and the front and rear bumpers 3 and 4 attached to the body 2 are shown as an example of the resin work.

The painting equipment 1 shown in FIG. 1 performs a painting process on a vehicle body body 2 that moves on a line and a front bumper 3 and a rear bumper 4 that are attached to the front and rear of the vehicle body body 2. The arrows in the figure indicate the flow direction of the line.

As shown in FIG. 1, on the upstream side line of the painting equipment 1, a pair of vehicle body main body 2 and bumpers 3 and 4 are respectively provided on a transport jig (not shown) such as a trolley. A mounting process 5 for mounting is provided, in which the vehicle body M1 mounted on the transport jig is transported to the coating process unit 6. In the coating process unit 6, the same paint is integrally applied to the conveyed vehicle body M1.

A vehicle body distribution portion 7 is provided downstream of the coating process portion 6, and a vehicle body separation portion 8 is further provided downstream thereof. A production ID in which common identification information is stored is attached to the vehicle body body 2 and the pair of bumpers 3 and 4, which are mounted on the dedicated transfer jigs ((not shown)), respectively. The vehicle body distribution unit 7 is provided with a vehicle body ID information acquisition unit 16 that reads the production ID. Further, the vehicle body separating portion 8 separates the vehicle body main body 2 and the pair of bumpers 3 and 4 respectively mounted on a dedicated transfer jig ((not shown)).

Downstream of the body separating unit 8, a vehicle body baking and drying process unit 9 as metal works baking and drying process unit, and the bumper baking and drying process unit 10 as a resin-made work baking and drying process unit is disposed in parallel There is. Each of the baking and drying process units 9 and 10 is provided with a high temperature baking drying furnace 11 as a high temperature baking drying unit and a low temperature baking drying furnace 12 as a low temperature baking drying unit, and further downstream of the high temperature baking drying furnace 11. A vehicle body body hue detection process unit 13 is provided as a metal work hue detection process unit. Further, a bumper hue detection process unit 14 as a resin work hue detection process unit is provided downstream of the low-temperature baking drying furnace 12. Further, a fast-forward area 17 as a fast-forward process unit is continuous downstream of the bumper hue detection process unit 14.

Since the metal body body 2 and the resin bumpers 3 and 4 have different heat capacities, the baking temperatures and baking times set in the baking drying furnaces 11 and 12 are also different. In the present embodiment, the baking temperature corresponding to the heat capacity of the bumpers 3 and 4 is set to be lower than the baking temperature for the vehicle body 2, and the baking time is set to be longer than the baking time for the vehicle body 2. Therefore, the furnace body length of the low-temperature baking / drying furnace 12 is set longer than the furnace body length of the high-temperature baking / drying furnace 11.

The hue detection process unit 13 is provided with a vehicle body hue information acquisition unit 15, and the hue detection process unit 14 is provided with a bumper hue information acquisition unit 18. The vehicle body hue information acquisition unit 15 has a color camera, acquires a color image of the vehicle body 2 after the baking finish is completed, and detects the hue (Lab value). Similarly, the bumper hue information acquisition unit 18 also has a color camera, acquires color images of bumpers 3 and 4 in the middle of the baking and drying process, and detects the hue (Lab value).

Further, the painted surface inspection process unit 19 is continuous downstream of the vehicle body baking / drying process unit 9, and the vehicle body distribution unit 20 is continuous downstream thereof. An inspection booth is installed in the painted surface inspection process unit 19, and the inspection booth is provided with a painted surface information acquisition unit 23 including a color camera or the like for acquiring information on the painted surface of the vehicle body 2. This inspection booth inspects the painted surface for appearance defects (surface defects) due to scratches or the like from the painted surface information acquired by the painted surface information acquisition unit 23. Since the inspection for poor appearance is described in detail in Japanese Patent Application Laid-Open No. 2016-90309 previously submitted by the applicant, the description thereof is omitted here.

Further, the vehicle body carry-out adjustment unit 21 is continuous downstream of the vehicle body distribution unit 20. On the other hand, the bumper carry-out adjustment section 22 is continuous downstream of the bumper baking / drying process section 10. The vehicle body carry-out adjustment unit 21 is provided with a plurality of vehicle body stock lanes 21a for stocking the vehicle body 2 and a plurality of repair lanes 21b for correcting appearance defects of the vehicle body 2 in parallel. The upstream of the lanes 21a and 21b is connected to the vehicle body distribution unit 20 via the vehicle body carry-in lane L1. Further, the downstream of each vehicle body stock lane 21a and each repair lane 21b is merged with the vehicle body return lane L2, and the vehicle body return L2 is connected to the vehicle body carry-in lane L1 downstream of the vehicle body distribution unit 20. Has been done.

Further, a vehicle body collecting portion 24 as a work collecting portion for gathering the vehicle body 2, the front bumper 3, and the rear bumper 4 is interposed in the vehicle body return lane L2. Further, each vehicle body body stock lane 21a is housed in the vehicle body body side ID collation unit 25. Further, the downstream of each vehicle body stock lane 21a and each repair lane 21b are merged with the bypass lane L3 and connected to the vehicle body return lane L2 downstream of the vehicle body assembly portion 24.

On the other hand, the bumper carry-out adjustment unit 22 has a closed loop-shaped bumper return lane L4, and a plurality of bumper stock lanes 26 for stocking the bumpers 3 and 4 after painting is completed in a pair are arranged in parallel in the bumper return lane L4. Bypass connection is made in the arranged state. Further, a bumper side ID collation section 27 is interposed downstream of the bumper baking / drying process section 10 upstream of the bumper return lane L4. Further, in the bumper return lane L4, a vehicle body assembly portion 24 is interposed downstream of the bumper stock lane 26.

In the vehicle body collecting unit 24, a pair of bumpers 3 and 4 transported in the bumper return lane L4 are attached to the vehicle body 2 transported in the vehicle body return lane L2 to assemble the vehicle body M1. downstream branches from the vehicle body return lane L2, is connected to the outfitting line L5 continuous to the rear step portion (艤instrumentation step portion).

Further, the vehicle body side ID information acquisition unit 28 and the bumper side ID read the information of the common production ID attached to the vehicle body body 2 and the pair of bumpers 3 and 4 into the ID collation units 25 and 26. An information acquisition unit 29 is provided.

Further, a vehicle body distribution gate G1 is provided at a branch portion between the vehicle body carry-in lane L1, each vehicle body stock lane 21a, and each repair lane 21b, and each vehicle body stock lane 21a and each repair lane 21b. A bypass distribution gate G2 is provided at a branch portion between the bypass lane L3 and the bypass lane L3. Further, bumper stock distribution gates G3 and G4 are provided at the branching portions of the bumper return lane L4 and the bumper stock lane 26 on the upstream side and the downstream side, respectively. Further, an assembly portion gate G5 is provided at a branch portion between the vehicle body return lane L2 and the mounting line L5 on the downstream side of the vehicle body assembly portion 24.

Each of these gates G1 to G5 sets a transport destination between the vehicle body body 2 and the pair of bumpers 3 and 4 after the painting is completed, and the vehicle body body 2 and the bumpers 3 and 4 at the vehicle body collecting portion 24. As shown in FIG. 2, the vehicle body distribution gate G1 is switched by a drive signal from the vehicle body distribution gate drive unit 31, and the bypass distribution gate G2 is from the bypass distribution gate drive unit 32. The gate is switched by the drive signal. The bumper stock distribution gates G3 and G4 are switched by a drive signal from the bumper stock distribution gate drive unit 33, and the assembly gate G5 is switched by a drive signal from the assembly gate distribution gate drive unit 34.

As shown in FIG. 2, the vehicle body body hue information acquisition unit 15 arranged in the hue detection process unit 13, the vehicle body ID information acquisition unit 16 arranged in the vehicle body distribution unit 7, and the hue detection process unit 14 are provided. Information acquired by the bumper hue information acquisition unit 18, the vehicle body side ID information acquisition unit 28 provided in the vehicle body side ID collation unit 25, and the bumper side ID information acquisition unit 29 provided in the bumper side ID collation unit 27. Is read by the control unit 41. Further, the control unit 41 is also connected to a work information input unit 30 such as a keyboard, a mouse, and a touch panel for the operator to input work contents such as correction work from the outside.

The control unit 41 is composed of a microcomputer and peripheral devices including a storage unit 43 such as an HDD. The microcomputer has a CPU, a ROM, a RAM, and the like, and the CPU follows a program stored in the ROM. Performs predetermined arithmetic processing. This computer has a function as a production adjustment calculation unit 42, and a storage unit 43 contains fixed data such as production ID information for each vehicle body M1 and information acquisition units 15, 16, 18, 28, 29. Each information acquired in is sequentially stored in association with the production ID information.

The production adjustment calculation unit 42 reads the hue (vehicle body body Lab value) of the vehicle body body 2 after baking coating acquired by the vehicle body body hue information acquisition unit 15. The Lab value indicates a color system of L *, a *, and b *, L * is a value indicating brightness, and a * and b * are values indicating color.

Further, the hues (bumper Lab values) of the pair of bumpers 3 and 4 after baking coating acquired by the bumper hue information acquisition unit 18 are read, and the color difference ΔE * based on the hue of the vehicle body 2 is obtained.
ΔE * = [(body body L * -bumper L *) ² + (body body a * -bumper a *) ² + (body body b * -bumper b *) ² ] ^1/2 ... (1)
Calculate from.

Then, it is evaluated whether or not the color difference ΔE * is within the allowable range, and if it is within the allowable range, the pair of bumpers 3 and 4 and the vehicle body 2 are assembled to form the vehicle body M1. On the other hand, if the color difference E * is out of the permissible range, it is investigated whether or not the color difference can be adjusted, and if possible, the color difference E * is reprinted to a predetermined value, and the color difference ΔE * is kept within the permissible range and assembled to the vehicle body 2.

Further, the defect inspection control unit 51 and the post-process calculation unit 52 are freely bidirectionally connected to the production adjustment calculation unit 42. The defect inspection control unit 51 inspects the appearance defect (surface defect) of the painted surface due to scratches or the like based on the painted surface information from the painted surface information acquisition unit 23 provided in the inspection booth in the painted surface inspection process unit 19. To do. When the defect inspection control unit 51 detects an appearance defect, the production adjustment calculation unit 42 transports the vehicle body body 2 to the repair lane 21b. On the other hand, the production adjustment calculation unit 42 transmits the production ID information of the vehicle body M1 to be carried out to the post-process calculation unit 52.

Next, the operation of the coating equipment 1 configured in this way will be described. When the vehicle body M1 composed of the vehicle body body 2 and the pair of front and rear bumpers 3 and 4 is carried into the coating process unit 6 in a state of being mounted on the transfer jig, the same paint is applied all at once. Then, the vehicle body M1 for which the coating of the paint has been applied is conveyed to the vehicle body distribution unit 7.

Then, the production adjustment calculation unit 42 executes the hue adjustment process according to the routines shown in FIGS. 3 to 6. Note that each of these routines is executed in parallel.

[Painting line control processing]
When the vehicle body M1 is carried into the vehicle body distribution unit 7, in the painting line control processing routine shown in FIGS. 3 and 4, first, in step S1, the vehicle body ID information acquisition unit 16 arranged in the vehicle body distribution unit 7 The acquired production ID of the vehicle body M1 (each production ID of the vehicle body body 2 side and the bumpers 3 and 4 side) is read, and the vehicle body M1 is conveyed to the vehicle body separation unit 8 in step S2.

When the vehicle body M1 is conveyed to the vehicle body separating portion 8, in step S3, the vehicle body M1 is separated into the vehicle body body 2 and a pair of front and rear bumpers 3 and 4, and in step S4, the vehicle body 2 and a pair of front and rear bumpers 3 and 3 are separated. In a state where each of 4 and 4 is placed on a transfer jig, they are carried out to a high-temperature baking / drying furnace 11 of the vehicle body body baking / drying process section 9 and a low-temperature baking / drying furnace 12 of the bumper baking / drying process section 10.

Then, the vehicle body hue information (vehicle body Lab value) detected by the vehicle body baking / drying process / inspection routine shown in FIG. 5 and the bumper hue information (bumper Lab value) detected by the bumper baking / drying process / inspection routine shown in FIG. ) And wait until it is received.

[Car body baking drying process / inspection]
In the vehicle body baking / drying process / inspection routine shown in FIG. 5, first, the vehicle body 2 is carried into the high temperature baking drying furnace 11 in step S31, and when passing through the baking drying furnace 11 in step S32, the vehicle body 2 is baked and dried. Perform the process.

After that, the vehicle body 2 that has been baked and dried in a predetermined manner is conveyed to the hue detection process unit 13, the process proceeds to step S33, and the vehicle body is based on the color image of the outer surface of the vehicle body 2 captured by the vehicle body hue information acquisition unit 15. Hue (body Lab value) is detected. Then, in step S34, the vehicle body color information (vehicle body Lab value) is transmitted to the painting line control processing routine.

Thereafter, the process proceeds to step S35, to the painted surface inspection process unit 19 conveys the car body 2, captured by the coated surface information acquisition unit 23 consisting of such as a color is provided a camera in the inspection booth this coated surface inspection process 19 Based on the image, surface defects such as scratches formed on the surface are inspected as before. Then, the process proceeds to step S36, the presence or absence of a surface defect is determined, and if no surface defect is detected, the process proceeds to step S37, and the vehicle body distribution unit 20 executes a process of carrying the vehicle body 2 to the stock lane. On the other hand, when a surface defect is detected, the process proceeds to step S38, and the vehicle body distribution unit 20 executes a process of carrying the vehicle body 2 to the push lane.

Then, the vehicle body 2 conveyed to the vehicle body distribution unit 20 switches the vehicle body distribution gate G1 provided at the branch portion of the vehicle body carry-in lane L1 in accordance with the instruction from the vehicle body baking / drying process / inspection routine. Then, the vehicle body body 2 is distributed to the vehicle body body stock lane 21a and the repair lane 21b in a predetermined manner and carried out. In the repair lane, the surface defect of the vehicle body 2 is repaired in a predetermined manner, and the repaired vehicle body 2 is returned to the vehicle body stock lane 21a for stocking.

[Bumper baking drying process / inspection]
In the bumper baking drying process / inspection routine shown in FIG. 6, which is executed in parallel with the vehicle body body baking drying process / inspection routine described above, first, the pair of bumpers 3 and 4 are subjected to the bumper baking drying process section 10 in step S41. the carried into the low-temperature baking and drying oven 12, to execute as baking and drying engineering a predetermined in step S42.

Next, the baking and drying process is executed for a preset time, the process proceeds to step S43, and the bumper hue information acquisition section 18 of the hue detection process section 14 has acquired the bumpers 3 and 4 in the middle of baking finish. The bumper hue (bumper Lab value) is detected based on the color image, the process proceeds to step S44, the bumper hue information (bumper Lab value) is transmitted to the painting line control processing routine, and until there is an instruction from the painting line control processing routine. stand by.

[Painting line control processing]
In step S5 of the painting line control processing routine, the vehicle body hue information (vehicle body Lab value) detected by the vehicle body baking drying process / inspection routine is read, and in step S6, the bumper inspected by the bumper baking drying process / inspection routine. Read the hue information (bumper Lab value). Then, in step S7, the vehicle body Lab value and the vehicle body Lab value are collated, and the color difference ΔE * based on the hue of the vehicle body 2 is calculated from the above equation (1).

Then, in step S8, it is evaluated whether or not the color difference ΔE * is within the allowable range ± α, that is, | ΔE * | <α, with reference to the characteristic diagram showing the color difference allowable range shown in FIG. The processing in steps S7 and S8 corresponds to the color difference detection and evaluation process unit of the present invention. Further, the baking time t1 in FIG. 7 is the minimum baking time for the bumpers 3 and 4, and the normal baking time is, for example, as described in A1 or A2 in the same figure. It is set to a time longer than this minimum baking time t1.

Then, when it is determined that the color difference ΔE * is out of the permissible range of | ΔE * |> α (for example, A1.A2, A4, A5 in FIG. 7), the process branches to step S9, the lamp is lit, and the buzzer is turned on. An abnormality alarm is notified to the operator by a sounding or the like, the process proceeds to step S10, and the bumper hue adjustment instruction is transmitted to the bumper baking finish / inspection routine.

On the other hand, when it is determined that the color difference ΔE * is within the allowable range of | ΔE * | ≦ α (for example, A3 in FIG. 7), the process proceeds to step S11, and a bumper fast-forward instruction is given to the bumper baking finish / inspection routine. , Wait until the bumpers 3 and 4 are conveyed to the bumper side ID collation unit 27.

[Bumper baking drying process / inspection]
In step S45 of the bumper baking / drying process / inspection routine shown in FIG. 6, it is checked whether or not there is a bumper fast-forward instruction from the coating line control process routine, and if there is no bumper fast-forward instruction, that is, there is a bumper hue adjustment instruction, a step. Branching to S46, it is possible to check the position (for example, A1.A2, A4, or A5 in FIG. 7) of the current color difference ΔE * with respect to the color difference characteristic diagram shown in FIG. 7, and adjust the bumper hue. Judge whether or not.

That is, as shown in FIG. 7, the hues (bumper Lab values) of the bumpers 3 and 4 increase with a certain inclination as the baking time increases. Therefore, the preset inclination of the baseline Lin and the current position of the color difference ΔE * (for example, A1.A2, A4, A5 in FIG. 7) are compared. Then, as shown in, for example, A1 and A2, when it is on the allowable range ± α side of the baseline Lin and is less than the allowable range ± α, it is determined that the bumper hue can be adjusted, and the process proceeds to step S47.

On the other hand, as shown in A4 and A5, for example, if it is on the anti-permissible range ± α side of the baseline Lin or exceeds the permissible range ± α, it is determined that the hue cannot be adjusted, and the process branches to step S48. Then, in step S48, reprocessing such as transporting to a sampling lane (not shown) and performing repainting is performed.

Further, when the process proceeds to step S47, the additional printing time (for example, A1 to time t2 and A2 to time t3) within the allowable range ± α is calculated from the current position of the color difference ΔE * and the inclination of the baseline Lin. Then, in the fast-forward area 17, the hue is adjusted by baking and drying for the additional printing time, and after reaching the additional printing time, the process proceeds to step S49. Therefore, the fast-forward area 17 has a function as a hue adjusting process unit of the present invention.

On the other hand, if it is determined in step S45 that there is a bumper fast forward instruction, the process proceeds to step S49 as it is.

When the process proceeds from step S45 or step S47 to step S49, the bumpers 3 and 4 are fast-forwarded in the fast-forward area 17 and transported to the bumper-side ID collation unit 27 at an early stage. By fast-forwarding the bumpers 3 and 4 in the fast-forward area 17, the production efficiency can be improved.

[Painting line control processing]
In step S12 of the painting line control processing routine shown in FIGS. 3 and 4, the production IDs attached to the bumpers 3 and 4 acquired by the bumper side ID information acquisition unit 29 and transmitted to the bumper side ID collation unit 27 To read. Then, the process proceeds to step S13, the production ID of the vehicle body 2 stocked in the vehicle body stock lane 21a is read, and the vehicle body 2 having the same production ID as the production ID attached to the bumpers 3 and 4 is collated. ..

Next, in step S14, it is checked whether or not the vehicle body body 2 having the production ID matching the production IDs of the bumpers 3 and 4 is detected. Then, when the matching vehicle body body 2 is not detected, the vehicle branches to step S15, and after notifying the operator of the abnormality alarm by lighting the lamp, sounding the buzzer, etc., the process proceeds to step S16, and the bumper stock distribution gate The G3 is driven to carry the bumpers 3 and 4 to the bumper stock lane 26 and put them on standby.

The vehicle body body 2 corresponding to the bumpers 3 and 4 stocked in the bumper stock lane 26 is predeterminedly repaired in the repair lane 21b, and the vehicle body body 2 that has been repaired is transported to the vehicle body body stock lane 21a and stocked. Will be done. Therefore, when the vehicle body body 2 having the production ID matching the production IDs of the bumpers 3 and 4 stocked in the bumper stock lane 26 is detected in the vehicle body body stock lane 21a, the operator waits for a predetermined timing and waits for a predetermined timing. ID collation by both ID collation units 25 and 27 is temporarily suspended, and in that state, the bumpers 3 and 4 having the same production IDs stocked in the stock lanes 21a and 26 and the vehicle body 2 are combined with the vehicle body assembly unit 24. To be transported to.

On the other hand, when the vehicle body body 2 having the same production ID is stocked in the vehicle body body stock lane 21a, in step S17, the bypass distribution gate G2 is driven to convey the vehicle body body 2 to the vehicle body assembly unit 24. Further, the bumpers 3 and 4 carried into the bumper side ID collation section 27 are also conveyed to the vehicle body collecting section 24.

Then, the process proceeds to step S18, and the vehicle body assembly unit 24 attaches the bumpers 3 and 4 to the vehicle body body 2 carried in to assemble the vehicle body M1. Thereafter, the process proceeds to step S19, to unload the vehicle body M1 was assembled on subsequent steps unit (艤instrumentation step portion).

As described above, in the present embodiment, the baking and drying treatments for the metal body body 2 and the resin bumpers 3 and 4 having significantly different heat capacities are individually performed in the baking drying furnaces 11 and 12, and then they are assembled together. The hue (body body Lab value, bumper Lab value) is obtained individually, and the color difference ΔE * for comparing both Lab values is obtained. If this color difference ΔE * is within the predetermined allowable range ± α, the vehicle body body Since 2 and the resin bumpers 3 and 4 are assembled, the bumpers 3 and 4 are not thermally deformed during baking and drying, and no color difference defect is detected after the assembly. High production efficiency can be obtained.

Furthermore, if the color difference ΔE * is out of the permissible range ± α, and if the color difference ΔE * can be kept within the permissible range ± α by performing the baking drying increase for a predetermined time, the baking drying additional time is obtained. Since it is baked and dried, the color difference ΔE * can be kept within the allowable range ± α with a high probability.

Further, since the fast-forward area 17 is provided so that the bumpers 3 and 4 after baking and drying are fast-forwarded, higher productivity can be obtained.

The present invention is not limited to the above-described embodiment. For example, the metal body body 2 and the resin bumpers 3 and 4 are examples of the metal work and the resin work, and are limited thereto. It's not a thing. Further, the target work is not limited to vehicle parts.

1 ... Painting equipment,
2 ... Body body,
3 ... Front bumper,
4 ... Rear bumper,
5 ... Mounting process section ,
6 ... Coating process part ,
7 ... Body distribution section,
8 ... Body separation part,
9 ... vehicle body baking and drying process unit,
10 ... Bumper baking and drying process department ,
11 ... High temperature baking drying oven,
12 ... Low temperature baking drying oven,
13, 14 ... Hue detection process unit ,
15 ... Body hue information acquisition unit,
16 ... Information acquisition department,
17 ... Fast forward area,
18 ... Bumpa hue information acquisition department,
19 ... Painted surface inspection process department ,
20 ... Body distribution section,
21 ... Car body carry-out adjustment unit,
21a ... Body stock lane,
21b ... Repair lane,
22 ... Bumper carry-out adjustment unit,
23 ... Painted surface information acquisition department,
24 ... Body assembly,
25 ... Collation unit on the vehicle body side,
26 ... Bumpa Stock Lane,
27 ... Bumper side collation,
28 ... ID information acquisition unit on the vehicle body side,
29 ... Bumper side ID information acquisition department,
30 ... Work information input unit,
31 ... Body distribution gate drive unit,
32 ... Bypass distribution gate drive unit,
33 ... Bumper stock distribution gate drive unit,
34 ... Assembly part distribution gate drive part,
41 ... Control unit,
42 ... Production adjustment calculation unit,
43 ... Memory
51 ... Defect inspection control unit,
52 ... Post-process calculation unit,
G1 ... Body distribution gate,
G2 ... Bypass distribution gate,
G3, G4 ... Bumpa stock distribution gate,
G5 ... Assembly gate,
L1 ... Car body carry-in lane,
L2 ... Body return lane,
L3 ... Bypass lane,
L4 ... Bumpa return lane,
L5 ... Equipment line,
Lin ... Baseline,
M1 ... Body,
ΔE *… Color difference

Claims (8)

A coating process section in which the same paint is collectively applied to the metal work and the resin work to be attached to the metal work.
The metal work baking and drying process section and the resin work baking and drying process section , in which the metal work coated with the same paint and the resin work are baked and dried at different temperatures,
In a painting facility in which a work collecting portion for assembling the metal work and the resin work after baking and drying is provided on the line.
A metal work hue detection process unit that detects the hue of the metal work that has been baked and dried,
A resin work hue detection process unit for detecting the hue of the resin work provided in the middle of baking and drying for a predetermined time.
A control unit having a color difference detection and evaluation process unit that detects a color difference from the two hues detected by the both hue detection process units and evaluates whether or not the color difference is within a preset allowable range is further provided.
If it is determined that the color difference in the color difference detection evaluation process unit is within the permissible range set in advance, Ru is assembled and the resin workpiece and the metal workpiece by the workpiece assembly unit
Painting equipment which is characterized a call. When the color difference detection and evaluation process unit determines that the color difference is out of the preset allowable range, the resin work is further baked and dried by the resin work baking and drying process unit to obtain the hue of the resin work. The coating equipment according to claim 1, further comprising a hue adjusting process unit for adjusting. The resin work baking and drying process unit is provided with a fast-forward process for fast-forwarding the resin work when the color difference detection and evaluation process unit determines that the color difference is within a preset allowable range. The coating equipment according to claim 1 or 2, characterized in that. A production ID in which information common to the metal work and the resin work is stored is attached.
Painting installation according to any one of claims 1 to 3, characterized in that assembled with the metal workpiece and the plastic workpiece having the production ID information the matching the workpiece assembly unit. After applying the same paint to the metal work and the resin work to be attached to the metal work at once,
The metal work coated with the same paint and the resin work are baked and dried at different temperatures.
In a painting method in which the metal work and the resin work after baking and drying are assembled.
The hue of the metal work that has been baked and dried is detected, and
Further, the hue of the resin work that has been baked and dried for a predetermined time is detected.
The color difference between the two hues is detected, and it is determined whether or not the color difference is within a preset allowable range.
A coating method characterized by assembling the metal work and the resin work when it is determined that the color difference is within an allowable range. The coating method according to claim 5, wherein when the color difference is out of a preset allowable range, the resin work is further baked and dried to adjust the hue of the resin work. The coating method according to claim 5 or 6, wherein when it is determined that the color difference is within a preset allowable range, the resin work is fast-forwarded. A production ID in which information common to the metal work and the resin work is stored is attached.
The method of coating according to any one of claims 5-7, characterized in that to assemble with the metal workpiece and the plastic workpiece having the production ID information match.

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