A paint spraying inspection agency

Abstract

This application provides a paint spraying inspection mechanism, comprising: a drying zone for drying workpieces transported along a first direction after painting; a transfer unit including a transfer platform for transferring workpieces transported in the first direction to a second direction; a cooling unit including a moving platform disposed near the transfer platform for transporting workpieces along the second direction to an inspection position, and a cooling device disposed on the moving platform for cooling the workpieces to a preset temperature; and an inspection zone including an inspection device and a controller connected to the inspection device, wherein the inspection device is used to collect color difference data at at least one point on the workpiece moved to the inspection position, and the controller is used to determine whether the current paint spraying of the workpiece meets the color difference requirements based on the color difference data collection results; by cooling the workpieces to a preset temperature during transport and collecting color difference data through the cooling unit, the inspection error caused by high temperature is reduced.

Description

Technical Field

[0001] This application belongs to the field of automotive painting technology, specifically relating to a paint inspection agency. Background Technology

[0002] In the automotive manufacturing industry, after the workpiece is painted and dried, color difference detection is required to ensure the consistency of the paint color. Optical detection devices are usually used to collect and analyze color data at specific points on the workpiece to achieve color difference detection.

[0003] In traditional processes, the dried workpiece is directly transferred to the detection position for color difference collection. However, the paint surface at high temperature differs from that at room temperature. The optical reflection characteristics of the paint surface change at high temperature, causing the data collected by the optical detection device to be distorted and unable to truly reflect the actual painting effect of the workpiece. This results in detection errors and makes it difficult to meet the requirements of the painting industry for color difference consistency. Utility Model Content

[0004] This application provides a paint spraying inspection mechanism that uses a cooling unit to cool the workpiece to a preset temperature during transport and collect color difference data, thereby reducing inspection errors caused by high temperatures.

[0005] To address the aforementioned technical problems, this application provides a paint spraying inspection mechanism, comprising:

[0006] The drying zone is used to dry the workpieces that have been painted and transported along the first direction.

[0007] The transfer unit includes a transfer platform that transfers workpieces transported in the first direction to the second direction for further transport.

[0008] The cooling unit includes a moving platform located near the transfer platform for transferring the workpiece along the second direction to the detection position, and a cooling device located on the moving platform for cooling the workpiece to a preset temperature.

[0009] The detection area includes a detection device and a controller connected to the detection device. The detection device is used to collect color difference data at at least one point on the workpiece that has been moved to the detection position. The controller is used to determine whether the paint spraying of the current workpiece meets the color difference requirements based on the color difference data collection results.

[0010] As a further improvement of this application, the transfer unit includes a lifting drive component disposed below the transfer platform for driving the transfer platform to move up and down, a rotating platform disposed on the transfer platform, and a rotating drive component disposed at the bottom of the transfer platform for driving the rotating platform to rotate by a preset angle.

[0011] A first conveyor belt for transporting workpieces along a first direction is provided between the drying zone and the transfer unit. The transfer platform is located on the transport path of the first conveyor belt, and the upper surface of the rotating platform is flush with the upper surface of the first conveyor belt.

[0012] As a further improvement of this application, the rotating platform is also provided with a conveying roller, a conveying baffle located at the edge of the rotating platform, and a push rod connected to the conveying baffle;

[0013] The conveyor baffle is used to block the workpiece being conveyed to the rotating platform and keep it stationary, and to push the workpiece after it has been rotated by a preset angle onto the first conveyor belt or the moving platform.

[0014] As a further improvement of this application, a second conveyor belt is provided between the detection area and the transfer unit to transport the workpiece along a second direction, and the moving platform is located on the second conveyor belt to transport the workpiece from the moving platform to the detection position.

[0015] As a further improvement of this application, the mobile platform includes a mobile base plate and mobile baffles disposed on both sides of the mobile base plate. The mobile base plate is provided with a cooling zone and a hollowed-out area surrounding the cooling zone.

[0016] The cooling device includes a semiconductor refrigeration element disposed on the cooling zone. The cooling end of the semiconductor refrigeration element is disposed close to the workpiece to cool the workpiece. The hollowed-out area is filled with a desiccant.

[0017] As a further improvement of this application, a removable cover plate is provided on the hollow area to replace the desiccant filling the hollow area.

[0018] As a further improvement of this application, the detection device includes at least one detection probe and a robotic arm that controls the detection probe to collect color difference data from the workpiece.

[0019] As a further improvement of this application, an angle sensor is provided between the detection probe and the robot arm so that the detection probe is perpendicular to the workpiece surface when collecting color difference data of the workpiece.

[0020] As a further improvement of this application, a distance sensor is provided between the detection probe and the robot arm so that the distance between the detection probe and the workpiece surface does not exceed 200mm when the detection probe collects color difference data of the workpiece.

[0021] As a further improvement of this application, the transfer unit is further provided with a third conveyor belt on the side away from the drying zone, which carries the workpiece along the first direction. The third conveyor belt is used to move the workpiece to the next process.

[0022] The paint inspection agency provided in this application transfers workpieces from the first direction to the second direction via a transfer platform. This allows for flexible adjustments to the production line layout, preventing paint inspection from affecting other workpieces being transported. While the moving platform transports workpieces along the second direction, a cooling device simultaneously cools the workpieces to a preset temperature, eliminating the impact of high temperatures on the optical reflection characteristics of the paint surface after drying and preventing data distortion caused by excessively high temperatures. After cooling, the inspection device collects color difference data at at least one point on the workpiece and, in conjunction with the controller, determines whether the current paint application meets the color difference requirements, effectively improving the accuracy of the color difference detection results and meeting the stringent requirements for color consistency in the automotive paint industry. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the paint spraying inspection mechanism provided in the embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the rotating platform in the paint spraying inspection mechanism provided in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the detection device in the paint spraying inspection mechanism provided in the embodiments of this application;

[0027] Figure 4 This is a schematic diagram of the cooling device in the paint spraying inspection mechanism provided in the embodiments of this application;

[0028] Figure 5 This is a functional block diagram of the paint spraying inspection mechanism provided in the embodiments of this application;

[0029] Explanation of reference numerals in the attached figures:

[0030] 10 - Drying zone; 11 - First conveyor belt;

[0031] 20-Transfer unit; 21-Transfer platform; 22-Lifting drive component; 221-Base; 222-First lifting rod; 223-Second lifting rod; 23-Rotating platform; 24-Rotating drive component; 241-Transfer roller; 242-Transfer baffle; 243-Push rod;

[0032] 30-Cooling unit; 31-Moving platform; 311-Moving base plate; 312-Moving baffle; 32-Cooling device; 321-Cooling zone; 322-Perforated area; 323-Cover plate; 33-Second conveyor belt;

[0033] 40 - Detection area; 41 - Detection device; 411 - Detection probe; 412 - Robotic arm;

[0034] 50 - Third conveyor belt;

[0035] 60 - Non-compliant area. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0037] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0038] To make the description of this disclosure more detailed and complete, illustrative descriptions of the implementation methods and specific embodiments of this application are provided below; however, this is not the only form of implementing or utilizing the specific embodiments of this application. The implementation methods cover the features of multiple specific embodiments and the method steps and their order for constructing and operating these specific embodiments. However, other specific embodiments may also be used to achieve the same or equivalent functions and step sequences.

[0039] In the automotive manufacturing industry, after the workpiece is painted and dried, color difference detection is required to ensure the consistency of the paint color. Optical detection devices are usually used to collect and analyze color data at specific points on the workpiece to achieve color difference detection.

[0040] In traditional processes, the dried workpiece is directly transferred to the detection position for color difference collection. However, the paint surface at high temperature differs from that at room temperature. The optical reflection characteristics of the paint surface change at high temperature, causing the data collected by the optical detection device to be distorted and unable to truly reflect the actual painting effect of the workpiece. This results in detection errors and makes it difficult to meet the requirements of the painting industry for color difference consistency.

[0041] In view of this, please refer to Figures 1-5 This application provides a paint spraying inspection mechanism, including a drying zone 10, a transfer unit 20, a cooling unit 30, and an inspection zone 40. The cooling unit 30 cools the workpiece to a preset temperature during the transfer process and collects color difference data, thereby reducing inspection errors caused by high temperature.

[0042] As an optional implementation method, please refer to Figure 1 The diagram shows the structure of the paint spraying inspection mechanism provided in this application embodiment. It can be observed that a first conveyor belt 11 for transporting the workpiece along the first direction is provided between the drying zone 10 and the transfer unit 20. When the workpiece enters the drying zone 10 after being painted, the drying zone 10 can dry the workpiece that has been transported along the first direction after being painted.

[0043] Furthermore, the aforementioned transfer unit 20 includes a transfer platform 21, through which workpieces transported along the first direction are transferred to the second direction for transport, workpieces that need to be sampled are transferred to the second direction for transport, while workpieces that do not need to be sampled continue to be transported along the first direction.

[0044] In this embodiment of the application, the cooling unit 30 includes a mobile platform 31 located near the transfer platform 21. Through the cooperation of the transfer platform 21 and the mobile platform 31, the workpiece can be moved from the transfer platform 21 to the mobile platform 31, and then the workpiece can be transferred along the second direction via the mobile platform 31.

[0045] Meanwhile, this application provides a cooling device 32 on the mobile platform 31 that can cool the workpiece to a preset temperature, thereby cooling the workpiece while moving it and avoiding the impact of high temperature on the paint spraying inspection.

[0046] In this embodiment of the application, the detection area 40 is provided with a detection device 41 and a controller (not shown in the figure) connected to the detection device 41. When the moving platform 31 transports the workpiece to the detection position along the second direction, the detection device 41 performs color difference acquisition at least one point on the workpiece at the detection position so that the controller can determine whether the current workpiece painting meets the color difference requirements based on the color difference acquisition result.

[0047] I understand, please refer to Figure 5 The diagram shows the functional modules of the paint spraying inspection mechanism provided in this application embodiment. The connection between the inspection device 41 and the controller provided in this application can be a wired connection or a wireless connection. Any connection method is acceptable as long as the controller can receive the color difference acquisition result. This application does not impose too many restrictions on this.

[0048] The aforementioned controller can be configured as a common controller type, such as MCU (Microcontroller Unit), PFGA (Field Programmable Gate Array), or PLC (Programmable Logic Controller). The controller determines whether the current workpiece paint meets the color difference requirements based on the color difference acquisition results. For example, the color difference acquisition results can be compared with a preset threshold to determine whether the current workpiece paint meets the color difference requirements. This method of determining whether the current workpiece paint meets the color difference requirements based on the color difference acquisition results is a common application in the field of controllers and does not involve any improvement to the algorithm.

[0049] Preferably, color difference sampling can be performed at multiple points depending on the size of the workpiece. For example, color difference sampling can be performed at three, five, six or even more points. Color difference sampling can be performed concentrated in a certain area or dispersed in a certain area. This application does not impose too many restrictions on this.

[0050] This application uses a transfer platform 21 to transfer the workpiece from the first direction to the second direction. While the mobile platform 31 is transferring the workpiece along the second direction, the cooling device 32 cools the workpiece to a preset temperature to avoid the influence of high temperature on subsequent color difference detection. Then, the detection device 41 collects color difference data at at least one point on the cooled workpiece, which effectively improves the accuracy of the color difference detection results.

[0051] Since the temperature of the dried workpiece is usually higher than 50°C, this application preferably sets the preset temperature to no more than 30°C. Of course, the preset temperature can also be adjusted according to the actual production line and workpiece conditions. This application does not impose too many restrictions on this.

[0052] As an optional implementation method, please refer to Figure 2 This is a schematic diagram of the structure of the rotating platform in the paint spraying inspection mechanism provided in this application embodiment. The transfer unit 20 provided in this application includes a lifting drive 22 and a rotating drive 24 disposed below the transfer platform 21. This application drives the transfer platform 21 to lift in the height direction through the lifting drive 22, and rotates the rotating platform 23 disposed on the transfer platform 21 through the rotating drive 24, thereby rotating the workpiece on the rotating platform 23 from the first direction to the second direction, or moving the workpiece on the rotating platform 23 from the second direction to the first direction.

[0053] Optional, please continue to refer to Figure 2The lifting drive component 22 can be configured as a scissor-type lifting platform. The lifting drive component 22 includes at least a base 221, a first lifting rod 222 and a second lifting rod 223 hinged to each other on the base 221, and the other ends of the first lifting rod 222 and the second lifting rod 223 abut against the transfer platform 21. By controlling the angle between the first lifting rod 222 and the second lifting rod 223, the height of the transfer platform 21 can be adjusted.

[0054] Of course, the lifting drive 22 can also be configured as a drive motor and an output shaft (not shown in the figure), with the output shaft of the drive motor connected to the transfer platform 21 for transmission, thereby controlling the transfer platform 21 to move in the height direction. Since the above-mentioned scissor-type lifting platform or the drive motor and output shaft transmission configuration are widely used in this field, this application will not elaborate on the details. As long as the configuration of the lifting drive 22 can realize the control of the transfer platform 21 to move in the height direction, it is feasible, and this application will not impose too many restrictions on it.

[0055] Furthermore, this application sets the rotary drive 24 in the form of a rotary motor, sets the rotary motor at the bottom of the transfer platform 21, sets the rotary platform 23 on the transfer platform 21, and makes the rotary motor and the rotary platform 23 drively connected, so that the rotary motor controls the rotation of the rotary platform 23 and the workpiece on the rotary platform 23 to rotate by a preset angle.

[0056] It is understood that when transferring the workpiece, it is necessary to transfer the workpiece to the rotating platform 23. The rotating drive component 24 controls the rotating platform 23 and the workpiece on the rotating platform 23 to rotate by a preset angle, thereby rotating the workpiece on the rotating platform 23 from the first direction to the second direction, or moving the workpiece on the rotating platform 23 from the second direction to the first direction.

[0057] Preferably, in this application, the transfer platform 21 is set in the transmission path of the first conveyor belt 11 to ensure that the upper surface of the rotating platform 23 is flush with the upper surface of the first conveyor belt 11, so that the workpiece on the first conveyor belt 11 is smoothly transferred to the rotating platform 23.

[0058] As an optional implementation method, please refer to Figure 1 It can be observed that the rotating platform 23 provided in this application is also provided with a conveyor roller 241. Since the first conveyor belt 11 has a certain speed, when the workpiece is conveyed from the first conveyor belt 11 to the rotating platform 23, the conveyor roller 241 provided on it can provide a certain assistance to facilitate the first conveyor belt 11 to be conveyed to the rotating platform 23.

[0059] Furthermore, in order to prevent the workpiece from moving too far on the rotating platform 23 and falling off the rotating platform 23, this application also provides a conveying baffle 242 and a push rod 243 connected to the conveying baffle 242 at the edge of the rotating platform 23.

[0060] Preferably, the push rod 243 is configured as an electric push rod, and the conveying baffle 242 is positioned on the side away from the first conveyor belt 11. When the workpiece on the first conveyor belt 11 is conveyed to the rotating platform 23, the electric push rod pushes the conveying baffle 242 to block the workpiece on the rotating platform 23, keeping it stationary; or after the workpiece is rotated to a preset angle, the conveying baffle 242 is pushed to further move the workpiece on the rotating platform 23 to the moving platform 31 for color difference detection.

[0061] As an optional implementation, a second conveyor belt 33 is provided between the detection area 40 and the transfer unit 20 to transport along the second direction. In this application, a moving platform 31 is set on the second conveyor belt 33. After the workpiece on the rotating platform 23 moves to the moving platform 31, the workpiece is transported to the detection position of the detection area 40 through the moving platform 31.

[0062] In this embodiment of the application, the mobile platform 31 includes a mobile base plate 311 that follows the second conveyor belt 33 for transmission, and mobile baffles 312 disposed on both sides of the mobile base plate 311 to prevent the workpiece from falling off during the movement.

[0063] It is understandable that, in order to ensure that the workpiece is smoothly transferred to the rotary platform 23 and the moving platform 31, this application provides pressure sensors (not shown in the figure) on both the rotary platform 23 and the moving platform 31, and sets the moving baffle 312 to a transparent material to avoid the situation where the workpiece falls off without being detected in time.

[0064] Further, please refer to Figure 4 This is a schematic diagram of the cooling device in the paint spraying inspection mechanism provided in this application embodiment. In this application, a cooling area 321 is provided in the center of the movable base plate 311, and a hollow area 322 is provided around the cooling area 321. The cooling device 32 is placed on the cooling area 321 so as to cool the workpiece during the transmission process.

[0065] Specifically, the cooling device 32 provided in this application includes a semiconductor refrigeration element disposed in the cooling zone 321. In this application, the cooling end of the semiconductor refrigeration element is placed close to the workpiece to cool the workpiece. Since the workpiece temperature is too high, condensation may occur during the cooling process. Therefore, this application provides a hollow area 322 around the semiconductor refrigeration element, and fills the hollow area 322 with a desiccant to reduce the impact of condensation.

[0066] Preferably, the hollow area 322 is configured as a detachable structure. By removing the cover plate 323 above the hollow area 322 or by hingedly connecting the cover plate 323, the desiccant filled inside can be replaced in a timely manner to ensure the drying effect.

[0067] As an optional implementation, the detection device 41 described above can be configured as a color difference detector (not shown in the figure), please refer to... Figure 3 This is a schematic diagram of the structure of the detection device in the paint spraying inspection mechanism provided in this application embodiment. This application uses the detection probe 411 in the color difference detector to collect the color difference at at least one point of the workpiece that has been moved to the detection position. The position of the detection probe 411 is moved by the robot arm 412 to ensure the color difference collection effect.

[0068] Of course, if the cost allows, more than one detection probe 411 can be set up so that multiple points can be detected at the same time. Alternatively, one detection probe 411 can be set up and the robot arm 412 can move the detection probe 411 sequentially to the position where color difference collection is required. This application does not impose too many restrictions on the specific number of detection probes 411.

[0069] In an optional embodiment, in order to achieve better color difference acquisition effect and ensure detection accuracy, this application also provides an angle sensor between the detection probe 411 and the robot arm 412 to ensure that the detection probe 411 is perpendicular to the workpiece surface when acquiring color difference, thereby avoiding changes in optical reflection characteristics caused by angle deviation and effectively reducing color difference acquisition error.

[0070] Furthermore, this application also provides a distance sensor between the detection probe 411 and the robot arm 412 to ensure that the distance between the detection probe 411 and the workpiece surface does not exceed 200mm when the detection probe 411 collects color difference data from the workpiece, thereby avoiding inaccurate data collection due to excessive distance and achieving accurate measurement within the effective distance.

[0071] It is understandable that after the detection probe 411 collects color difference data at at least one point on the workpiece that has been moved to the detection position, the controller determines whether the current workpiece paint meets the color difference requirements based on the color difference data collection results. If the color difference requirements are met, the workpiece needs to be transferred back to the production line along the moving platform 31 and the rotating platform 23 for the next production process.

[0072] In this embodiment, a third conveyor belt 50 is provided on the side of the transfer unit 20 away from the drying zone 10. The third conveyor belt 50 continues to transport along the first direction. Since it is not necessary to inspect all workpieces, but to sample individual workpieces, workpieces that do not need to be inspected will be directly transported to the next process via the rotating platform 23 and the third conveyor belt 50. Workpieces that pass the inspection will be transported back to the third conveyor belt 50 along the moving platform 31 and the rotating platform 23 for the next production process.

[0073] It should be noted that after the rotating platform 23 rotates to a preset angle to move the workpiece to be inspected onto the moving platform 31, it needs to continue rotating to the first direction to reset between the first conveyor belt 11 and the third conveyor belt 50, so that the workpieces that do not need to be inspected on the first conveyor belt 11 can be directly transferred to the third conveyor belt 50 via the rotating platform 23.

[0074] Preferably, since the workpiece that passes the inspection will be conveyed back to the third conveyor belt 50 along the moving platform 31 and the rotating platform 23, a conveyor baffle 242 and a push rod 243 can also be set on the moving platform 31. The conveyor baffle 242 can not only block and fix the workpiece at the inspection position, but also push the workpiece to the rotating platform 23 after the inspection is completed. The above setting method is also feasible.

[0075] Of course, for workpieces that fail the inspection, relevant personnel will be notified in a timely manner for verification, or a non-conforming area 60 will be set up at the inspection area 40. Workpieces that fail the inspection will be moved to the non-conforming area 60 in a timely manner by grabbing or conveyor belt, so as to avoid the accumulation of non-conforming workpieces affecting the painting inspection of other workpieces. The non-conforming area 60 provided above is only an optional implementation method. This application will not go into too much detail about the specific implementation details and steps.

[0076] The paint inspection agency provided in this application transfers workpieces from the first direction to the second direction via a transfer platform, flexibly adjusting the production line layout and avoiding the impact of paint inspection on other transferred workpieces. While the moving platform transfers workpieces along the second direction, the cooling device simultaneously cools the workpieces to a preset temperature, eliminating the influence of the high temperature of the workpiece after drying on the optical reflection characteristics of the paint surface and preventing distortion of the colorimeter data due to excessive temperature. After cooling, the inspection device collects color difference data at at least one point on the workpiece, and works with the controller to determine whether the current paint on the workpiece meets the color difference requirements, effectively improving the accuracy of the color difference detection results and meeting the strict requirements for color consistency in the automotive paint industry.

[0077] It is understood that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above embodiments are merely exemplary implementations used to illustrate the principles of this application; however, this application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this application, and these modifications and improvements are also considered to be within the scope of protection of this application.

Claims

1. A paint spray detection mechanism, characterized by, include: The drying zone is used to dry the workpieces that have been painted and transported along the first direction. The transfer unit includes a transfer platform that transfers workpieces transported in the first direction to the second direction for further transport. The cooling unit includes a moving platform located near the transfer platform for transferring the workpiece along the second direction to the detection position, and a cooling device located on the moving platform for cooling the workpiece to a preset temperature. The detection area includes a detection device and a controller connected to the detection device. The detection device is used to collect color difference data at at least one point on the workpiece that has been moved to the detection position. The controller is used to determine whether the paint spraying of the current workpiece meets the color difference requirements based on the color difference data collection results.

2. The paint detection mechanism of claim 1, wherein, The transfer unit includes a lifting drive unit located below the transfer platform for driving the transfer platform to move up and down, a rotating platform located on the transfer platform, and a rotating drive unit located at the bottom of the transfer platform for driving the rotating platform to rotate by a preset angle. A first conveyor belt for transporting workpieces along a first direction is provided between the drying zone and the transfer unit. The transfer platform is located on the transport path of the first conveyor belt, and the upper surface of the rotating platform is flush with the upper surface of the first conveyor belt.

3. The paint spraying inspection mechanism as described in claim 2, characterized in that, The rotating platform is also equipped with a conveying roller, a conveying baffle located at the edge of the rotating platform, and a push rod connected to the conveying baffle; The conveyor baffle is used to block the workpiece being conveyed to the rotating platform and keep it stationary, and to push the workpiece after it has been rotated by a preset angle onto the first conveyor belt or the moving platform.

4. The paint spraying inspection mechanism as described in claim 1, characterized in that, A second conveyor belt is provided between the detection area and the transfer unit to transport materials along a second direction. The moving platform is located on the second conveyor belt to transport the workpiece from the moving platform to the detection position.

5. The paint spraying inspection mechanism as described in claim 4, characterized in that, The mobile platform includes a mobile base plate and mobile baffles on both sides of the mobile base plate. The mobile base plate is provided with a cooling zone and a hollowed-out area surrounding the cooling zone. The cooling device includes a semiconductor refrigeration element disposed on the cooling zone. The cooling end of the semiconductor refrigeration element is disposed close to the workpiece to cool the workpiece. The hollowed-out area is filled with a desiccant.

6. The paint spraying inspection mechanism as described in claim 5, characterized in that, A removable cover is provided on the hollow area to replace the desiccant filling the hollow area.

7. The paint spraying inspection mechanism as described in claim 1, characterized in that, The detection device includes at least one detection probe and a robotic arm that controls the detection probe to collect color difference data from the workpiece.

8. The paint spraying inspection mechanism as described in claim 7, characterized in that, An angle sensor is provided between the detection probe and the robot arm so that the detection probe is perpendicular to the workpiece surface when collecting color difference data.

9. The paint spraying inspection mechanism as described in claim 7, characterized in that, A distance sensor is provided between the detection probe and the robotic arm to ensure that the distance between the detection probe and the workpiece surface does not exceed 200mm when collecting color difference data from the workpiece.

10. The paint spraying inspection mechanism as described in claim 2, characterized in that, The transfer unit is also provided with a third conveyor belt on the side away from the drying zone, which carries the workpiece along the first direction. The third conveyor belt is used to move the workpiece to the next process.

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