A method, apparatus and readable storage medium for detecting and identifying paint coating on sheet metal parts.

Abstract

This application discloses a method, apparatus, and readable storage medium for detecting and identifying sheet metal parts coated with paint, relating to the fields of painting and detection technology. The method includes: fixing the sheet metal part to be inspected at an angle in a target area, and placing a vibration component on the upper surface of the sheet metal part directly below a laser emitter; controlling the vibration component to start vibrating at a preset frequency, and using its own gravity to move downwards along the upper surface of the sheet metal part until it stops vibrating; determining the completion status of the paint coating on the sheet metal part based on the distance the vibration component has moved on the upper surface of the sheet metal part. This application avoids the problems of high labor costs and low efficiency, and high maintenance difficulty of cameras, when manually or via camera to detect the completion status of sheet metal parts coated with paint, thus improving the efficiency of sheet metal part inspection and reducing maintenance costs.

Description

Technical Field

[0001] This application belongs to the field of spraying and inspection technology, specifically relating to a method and device for spraying inspection and identification of sheet metal parts. Background Technology

[0002] Sheet metal parts refer to products manufactured using sheet metal processing techniques. Sheet metal processing is a technology that applies force to thin sheets of metal to deform them and create three-dimensional shapes. Spray painting sheet metal parts involves applying a suitable coating to their surface to provide protection against environmental corrosion and to enhance their appearance. Currently, the completion of sheet metal spray painting is primarily assessed manually or via camera recognition. However, when using near-transparent spray paint, relying solely on manual inspection or camera recognition for quality control presents challenges such as high labor costs, low efficiency, and the difficulty of maintaining cameras and other related equipment. Summary of the Invention

[0003] The purpose of this application is to provide a method, device, and readable storage medium for detecting and identifying sheet metal parts spraying, which can solve the problem of low efficiency in detecting the completion of sheet metal parts spraying by relying on manual or camera detection.

[0004] In a first aspect, embodiments of this application propose a method for detecting and identifying paint coating on sheet metal parts, applied to a paint coating detection system, the paint coating detection system including a vibration component, and the method comprising:

[0005] The sheet metal part to be tested is fixed at an angle in the target area, and the vibration component is placed on the upper surface of the sheet metal part directly below the laser emitter.

[0006] The vibration component is controlled to start vibrating at a preset frequency and move downward along the upper surface of the sheet metal part using its own gravity until it stops after the vibration ends.

[0007] The completion status of the sheet metal coating is determined based on the distance the vibration assembly moves on the upper surface of the sheet metal part.

[0008] Optionally, the coating inspection system further includes a laser emitter and a laser receiver, the laser receiver being placed on the upper surface of the vibration assembly; determining the coating completion status of the sheet metal part based on the movement distance of the vibration assembly on the upper surface of the sheet metal part includes:

[0009] The laser emitter is controlled to rotate until the laser receiver senses the beam emitted by the laser emitter, after which the laser emitter stops rotating. The rotation angle of the laser emitter from the start of rotation to the stop of rotation is recorded. The rotation angle is positively correlated with the distance the vibration component moves on the upper surface of the sheet metal part.

[0010] The coating completion status of the sheet metal part is determined based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part.

[0011] Optionally, determining the coating completion status of the sheet metal part based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part includes:

[0012] The target coefficient of friction of the upper surface of the sheet metal part after the sheet metal part has been painted.

[0013] Based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part, a preset threshold value for the rotation angle corresponding to the target friction coefficient is determined;

[0014] When the rotation angle is greater than a preset threshold, the painting of the sheet metal part is determined to be complete.

[0015] Optionally, controlling the vibration component to start vibrating at a preset frequency and move downwards along the upper surface of the sheet metal part using its own gravity until it stops vibrating includes:

[0016] The vibration component is equipped with a motor. The motor is controlled by a scheduling signal to start rotating, so that the vibration component starts to vibrate at a preset frequency and moves downward along the upper surface of the sheet metal part by its own gravity until it stops vibrating.

[0017] Optionally, the method further includes:

[0018] Completed sheet metal parts are sent to the next process for processing, while uncompleted sheet metal parts are placed in the abnormality marking area for rework.

[0019] Secondly, this application provides a sheet metal part spraying detection and identification device, including: a fixing module for fixing the sheet metal part to be detected at an angle in the target area, and placing the vibration component on the upper surface of the sheet metal part directly below the laser emitter;

[0020] The first control module is used to control the vibration component to start vibrating at a preset frequency and move downward along the upper surface of the sheet metal part using its own gravity until it stops after the vibration ends.

[0021] The first determining module is used to determine the completion status of the sheet metal coating based on the moving distance of the vibration component on the upper surface of the sheet metal component.

[0022] Optionally, the first determining module includes:

[0023] The second control module is used to control the rotation of the laser emitter until the laser receiver senses the beam emitted by the laser emitter and then controls the laser emitter to stop rotating. The rotation angle of the laser emitter from the start of rotation to the stop of rotation is recorded. The rotation angle is positively correlated with the distance the vibration component moves on the upper surface of the sheet metal part.

[0024] The second determining module is used to determine the completion status of the sheet metal coating based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal.

[0025] Optionally, the second determining module includes:

[0026] The third determining module is used to determine the target friction coefficient of the upper surface of the sheet metal part after the sheet metal part has been painted.

[0027] The fourth determining module is used to determine a preset threshold value of the rotation angle corresponding to the target friction coefficient based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part.

[0028] The fifth determining module is used to determine that the painting of the sheet metal part is complete when the rotation angle is greater than a preset threshold.

[0029] Optionally, the first control module includes:

[0030] The third control module includes a motor inside the vibration component. The motor is controlled to start rotating by a scheduling signal so that the vibration component starts to vibrate at a preset frequency and moves downward along the upper surface of the sheet metal part by its own gravity until it stops vibrating. The vibration component includes a motor inside.

[0031] Optionally, the first control module includes:

[0032] An adjustment module is used to adjust the preset frequency of the vibration component according to the length of the sheet metal part and the mass of the vibration component.

[0033] Optionally, the device further includes:

[0034] The placement module sends the painted sheet metal parts to the next process, while the unpainted sheet metal parts are placed in the abnormality marking area for rework.

[0035] In an embodiment of this application, a method for detecting and identifying sheet metal parts coated with paint is provided, comprising: fixing the sheet metal part to be detected at an angle in a target area, and placing a vibration component on the upper surface of the sheet metal part directly below a laser emitter; controlling the vibration component to start vibrating at a preset frequency, and using its own gravity to move downwards along the upper surface of the sheet metal part until it stops vibrating; and determining the completion status of the paint coating on the sheet metal part based on the distance the vibration component moves along the upper surface of the sheet metal part. This embodiment of the application achieves autonomous identification of whether air conditioning sheet metal parts have completed painting, improving factory production efficiency and reducing maintenance costs. Attached Figure Description

[0036] Figure 1 This is a flowchart illustrating the steps of a sheet metal part spray coating detection and identification method provided in an embodiment of this application;

[0037] Figure 2 This is a flowchart of another sheet metal part spray coating detection and identification method provided in the embodiments of this application;

[0038] Figure 3 This is a logic block diagram of a sheet metal part spraying detection and identification device provided in an embodiment of this application;

[0039] Figure 4 This is a schematic diagram of the structure of a spraying inspection system provided in an embodiment of this application. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0041] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0042] Method Implementation Examples

[0043] The sheet metal coating detection and identification method provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0044] Reference Figure 1 The flowchart illustrates the steps of a sheet metal part spray coating detection and identification method provided in an embodiment of this application, as follows: Figure 1 As shown, the method specifically includes the following steps:

[0045] Step 101: Fix the sheet metal part to be tested at an angle in the target area, and place the vibration component on the upper surface of the sheet metal part directly below the laser emitter;

[0046] Sheet metal parts refer to products manufactured using sheet metal processing techniques. Sheet metal processing is a technique that applies force to thin sheets of metal to deform them and create three-dimensional shapes. In daily life, sheet metal parts can be used to make cabinets for electrical distribution panels, computer cases, and the outer casings of air conditioner outdoor units, among other things.

[0047] The target area refers to the area where the coating completion status of the upper surface of the sheet metal part is inspected. The sheet metal part is placed at an angle and fixed in the target area in order to identify the coating completion status of the upper surface of the sheet metal part.

[0048] In this application embodiment, various methods can be used to obliquely fix the sheet metal part to be inspected in the target area, and this application embodiment does not impose specific limitations on this. For example, various process equipment can be used to obliquely fix the sheet metal part in the target area at a certain angle. For instance, the target area is a specific area on the ground. A base is placed in the target area. The base has a square or rectangular bottom, two opposite sides are triangular, and the other side is a square or rectangular shape. The upper surface of the base is also a square or rectangular shape. A rectangular groove is carved into the upper surface of the base. The bottom area of ​​the groove is smaller than the area of ​​the upper surface of the base. The shape of the bottom of the groove can be adjusted according to the shape of the sheet metal part so that the shape of the groove matches the shape of the sheet metal part. Furthermore, the perimeter of the groove is closed so that the sheet metal part will not move when placed inside the groove. By placing the sheet metal part in the groove on the upper surface of the base, the sheet metal part is obliquely placed in the target area at a certain angle.

[0049] The vibration assembly can move on the upper surface of the sheet metal part using its own weight and the force generated by vibration. The vibration assembly is typically a regular shape, such as a cube or cuboid. The contact surface between the vibration assembly and the sheet metal part is relatively large. During the movement of the vibration assembly, the sheet metal part generates frictional force acting on the vibration assembly through the contact surface. Furthermore, the contact surface between the vibration assembly and the sheet metal part is relatively smooth, thus minimizing the impact of the vibration assembly's own coefficient of friction on the actual frictional force received by the vibration assembly. In the embodiments of this application, the vibration assembly can be placed in various ways. For example, a robotic arm can be controlled to grip the vibration assembly and place it on the upper surface of the sheet metal part.

[0050] The angle at which the sheet metal part is fixed at an angle can be any angle within a specified range. For example, this range can be from 0° to 90°.

[0051] Step 102: Control the vibration component to start vibrating at a preset frequency, and use its own gravity to move downward along the upper surface of the sheet metal part until it stops after the vibration ends.

[0052] The preset frequency refers to the number of vibrations of the vibration component per unit time. Within the same time frame, a higher preset frequency results in more vibrations and a greater downward movement distance along the upper surface of the sheet metal part. To ensure that the downward movement distance of the vibration component along the upper surface of the sheet metal part does not exceed the length of the sheet metal part, the preset frequency of the vibration component needs to be controlled within a specific range based on the length of the sheet metal part and the mass of the vibration component.

[0053] When the vibration component first comes to rest on the upper surface of the sheet metal part, it experiences static friction and the component of gravity along the upper surface of the sheet metal part, and the static friction and the component of gravity along the upper surface of the sheet metal part are equal. After the vibration component starts to vibrate, the sliding friction force on the vibration component is less than the component of gravity along the upper surface of the sheet metal part. After the vibration component ends, the sliding friction force on the vibration component is greater than the component of gravity along the upper surface of the sheet metal part, and the vibration component continues to move downward along the upper surface of the sheet metal part until it stops under the action of the sliding friction force.

[0054] Optionally, baffles are provided on both sides of the sheet metal part so that the vibration component will not move off the sides of the sheet metal part when it moves downward along the upper surface of the sheet metal part by its own weight, wherein the width of the vibration component is equal to the width of the sheet metal part.

[0055] Step 103: Determine the completion status of the sheet metal coating based on the moving distance of the vibration assembly on the upper surface of the sheet metal part.

[0056] The distance the vibration component moves along the upper surface of the sheet metal part is the distance between the final position of the vibration component after it moves downward along the sheet metal part until it stops vibrating and comes to rest, and the starting position of the vibration component placed on the upper surface of the sheet metal part.

[0057] In this embodiment, the movement distance of the vibration component on the upper surface of the sheet metal part can be obtained in various ways. For example, the processor may include a measurement module that measures the distance between the end position and the starting position of the vibration component after it stops moving using a measuring ruler, and sends the measured movement distance to the processor. The processor then determines the completion status of the sheet metal part's coating based on the movement distance of the vibration component on the upper surface of the sheet metal part.

[0058] It should be noted that the completion status of sheet metal painting can include: complete painting, unpainted, and incomplete painting. In the embodiments of this application, both unpainted and incompletely painted refer to the sheet metal part not being painted. After the upper surface of the sheet metal part is painted, the paint material on the upper surface of the sheet metal part can reduce the coefficient of friction of the upper surface of the sheet metal part. When the completion status of the sheet metal part painting is different, the coverage area of ​​the paint material on the upper surface of the sheet metal part is different, resulting in different coefficients of friction of the upper surface of the sheet metal part. Specifically, when the upper surface of the sheet metal part is painted, the upper surface of the sheet metal part is completely covered by the paint material, that is, the coverage area of ​​the paint material is equal to the area of ​​the upper surface of the sheet metal part; when the upper surface of the sheet metal part is incompletely painted, the coverage area of ​​the paint material is less than the area of ​​the upper surface of the sheet metal part; when the sheet metal part is unpainted, the coverage area of ​​the paint material is 0. Therefore, the coefficient of friction of the sheet metal part after painting is less than the coefficient of friction of the sheet metal part when the upper surface of the sheet metal part is unpainted.

[0059] A higher coefficient of friction results in greater frictional force, and assuming the inherent properties of the vibration component remain unchanged, a smaller distance the vibration component travels along the upper surface of the sheet metal part. Specifically, the distance the vibration component travels along the upper surface of the sheet metal part after the upper surface has been coated is greater than the distance it travels when the upper surface has not been coated. For example, after the upper surface of the sheet metal part has been coated, the distance the vibration component travels along the upper surface is s_1; when the upper surface has not been coated, the distance it travels is s_2, where s_1 > s_2.

[0060] Specifically, according to the formula for calculating sliding friction, F = mgu*cosθ (where m is the mass of the vibrating component, g is the constant of gravitational acceleration, and θ is the angle of inclination of the sheet metal part), when other conditions remain unchanged, a decrease in the coefficient of friction of the upper surface of the sheet metal part results in a corresponding decrease in the sliding friction force experienced by the vibrating component as it moves along the upper surface of the sheet metal part. When the vibrating component moves downwards along the upper surface of the sheet metal part, the direction of the sliding friction force experienced by the vibrating component is opposite to the direction of its movement along the upper surface of the sheet metal part. As the coefficient of friction of the upper surface of the sheet metal part decreases, the sliding friction force experienced by the vibrating component decreases, while the component of the vibrating component's weight along the upper surface of the sheet metal part remains unchanged. Therefore, the force experienced by the vibrating component in the opposite direction to its movement decreases. Based on the relationship between force and acceleration of an object, the greater the force experienced by an object, the greater its acceleration. When the initial velocity is the same, the smaller the force on the vibration component that is opposite to its direction of motion, the smaller the acceleration of the vibration component, the longer the time required for the velocity to decrease to 0, and the greater the distance the vibration component moves along the upper surface of the sheet metal part.

[0061] For example, according to the formula for calculating sliding friction, F = μmgcosθ, when the mass m of the vibration component and the tilt angle θ of the sheet metal part remain constant, the sliding friction force on the upper surface of the sheet metal part is proportional to the coefficient of friction u of the upper surface of the sheet metal part. The coefficient of friction of the upper surface of the sheet metal part after spraying is u_1, the sliding friction force on the vibration component is f_1, the component of the gravity of the vibration component along the upper surface of the sheet metal part is G_1, the force on the vibration component when it moves downward along the upper surface of the sheet metal part is F_1 = G_1 - f_1, and the distance the vibration component moves downward along the upper surface of the sheet metal part is s_1.

[0062] When the upper surface of the sheet metal part is not sprayed, the coefficient of friction is u_2, and the corresponding sliding friction force received by the vibration component is f_2. Then, when the vibration component moves downward along the upper surface of the sheet metal part, the force F_2 it receives is F_2 = G_1 - f_2, and the distance that the vibration component moves downward along the upper surface of the sheet metal part is s_2. When u_1 < u_2, f_1 < f_2, and F_1 > F_2. After the sheet metal part is sprayed and in the case where the sheet metal part is not completed, the mass of the vibration component and the initial velocity of moving downward along the upper surface of the sheet metal part are the same. The moving distance s_1 of the vibration component along the upper surface of the sheet metal part under the action of F_1 is greater than the moving distance s_2 along the upper surface of the sheet metal part under the action of F_2.

[0063] Therefore, after the upper surface of the sheet metal part is sprayed, the moving distance of the vibration component along the upper surface of the sheet metal part is greater than that when the upper surface of the sheet metal part is not sprayed. Similarly, when the spraying completion situation of the upper surface of the sheet metal part is different, the corresponding moving distance of the vibration component along the upper surface of the sheet metal part is different. According to the moving distance of the vibration component along the upper surface of the sheet metal part, the spraying completion situation of the upper surface of the sheet metal part can be determined.

[0064] In the embodiment of the present application, the sheet metal part to be detected is obliquely fixed in the target area, and the vibration component is placed on the upper surface of the sheet metal part directly below the laser emitter; control the vibration component to start vibrating at a preset frequency, and move downward along the upper surface of the sheet metal part by using its own gravity until it stops after the vibration ends; determine the spraying completion situation of the sheet metal part according to the moving distance of the vibration component along the upper surface of the sheet metal part. Thus, by automatically obtaining the moving distance of the vibration component along the upper surface of the sheet metal part to determine the spraying completion situation of the sheet metal part, it replaces manual detection and improves the efficiency of detecting the sheet metal part and the accuracy of the detection result.

[0065] Optionally, the step 102 of controlling the vibration component to start vibrating at a preset frequency and move downward along the upper surface of the sheet metal part by using its own gravity until it stops after the vibration ends may include:

[0066] A motor is provided inside the vibration component, and the motor is controlled to start rotating through a scheduling signal, so that the vibration component starts vibrating at a preset frequency and moves downward along the upper surface of the sheet metal part by using its own gravity until it stops after the vibration ends.

[0067] It should be noted that when the vibration assembly is stationary on the upper surface of the sheet metal part, the static friction force it experiences is equal to the component of its weight along the upper surface of the sheet metal part. The vibration assembly contains a motor. When the motor starts rotating, controlled by a scheduling signal, there is an upward force perpendicular to the upper surface of the sheet metal part. Since the static friction force and the downward force perpendicular to the upper surface of the sheet metal part are positively correlated, the upward force perpendicular to the upper surface of the sheet metal part when the motor rotates reduces the downward force perpendicular to the upper surface of the sheet metal part. Consequently, the static friction force on the vibration assembly decreases, and the component of its weight along the upper surface of the sheet metal part is greater than the static friction force, allowing the vibration assembly to move downwards along the upper surface of the sheet metal part using its own weight. When the motor receives the scheduling signal and stops rotating, the vibration assembly stops vibrating and stops moving along the upper surface of the sheet metal part under the action of friction.

[0068] In this embodiment, the sheet metal part to be inspected is obliquely fixed in the target area, and the vibration assembly is placed on the upper surface of the sheet metal part directly below the laser emitter. The vibration assembly contains a motor, which is controlled by a scheduling signal to start rotating, causing the vibration assembly to vibrate at a preset frequency. When the motor rotates, it exerts an upward force perpendicular to the sheet metal part, causing the vibration assembly to move downwards along the upper surface of the sheet metal part using its own weight until it comes to rest after vibration ends. The completion status of the sheet metal part's coating is determined based on the distance the vibration assembly moves along the upper surface of the sheet metal part. Therefore, by incorporating a motor inside the vibration assembly, controlled by a scheduling signal, fully automated control of the vibration assembly's movement along the upper surface of the sheet metal part is achieved, improving the efficiency of detecting the completion status of the sheet metal part's coating.

[0069] Optionally, the following may be included before step 101:

[0070] The preset frequency of the vibration component is adjusted according to the length of the sheet metal part and the mass of the vibration component.

[0071] In this embodiment, the frequency of the vibration component is adjusted according to the length of the sheet metal part, so that the moving distance of the vibration component on the upper surface of the sheet metal part after the vibration stops is less than or equal to the length of the sheet metal part.

[0072] Optionally, the coating inspection system further includes a laser emitter and a laser receiver, with the laser receiver placed on the upper surface of the vibration assembly. Step 103, determining the coating completion status of the sheet metal part based on the movement distance of the vibration assembly on the upper surface of the sheet metal part, may include:

[0073] The laser emitter is controlled to rotate until the laser receiver senses the beam emitted by the laser emitter, after which the laser emitter stops rotating. The rotation angle of the laser emitter from the start of rotation to the stop of rotation is recorded. The rotation angle is positively correlated with the distance the vibration component moves on the upper surface of the sheet metal part.

[0074] The coating completion status of the sheet metal part is determined based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part.

[0075] A laser emitter is a device that converts electrical energy into laser energy. It consists of several parts, including a laser medium, a pump source, an optical resonator, and an output coupler. The laser medium is the medium that stores and converts the light beam into laser energy. The pump source provides the energy needed to activate the laser medium; common pump sources include optical pumping and electrical pumping. The optical resonator repeatedly propagates and reflects light within the laser medium, thereby enhancing the laser energy. The output coupler extracts the light beam from the optical resonator. Based on the state of the laser medium, laser emitters can be classified into the following types: solid-state lasers, gas lasers, and liquid lasers. Solid-state lasers refer to laser emitters where the laser medium is in a solid state, such as ruby ​​lasers, which use ruby ​​as the laser medium.

[0076] For example, the laser emitter can be fixed above the target area by a fixing device, and in the same vertical direction as the end of the sheet metal part away from the ground, so that the beam emitted by the laser emitter is vertically downward before it moves.

[0077] Here, the rotation tilt angle refers to the angle between the starting position of the laser emitter and the ending position where the laser emitter rotates the beam until the laser receiver senses the beam emitted by the laser emitter and stops rotating. For example, the rotation tilt angle is any angle between [0°, 90°].

[0078] As the vibrating assembly moves along the upper surface of the sheet metal part, the laser emitter continuously rotates and emits laser light until the laser receiver placed on the vibrating assembly senses the beam emitted by the laser emitter, at which point the laser emitter stops rotating. For example, after the vibrating assembly stops vibrating and comes to rest, the processor sends a rotation command to control the laser emitter to rotate; when the laser receiver senses the beam emitted by the laser emitter, it generates a sensing command and sends it to the processor. Upon receiving the sensing command, the processor sends a stop command to control the laser emitter to stop rotating. Alternatively, the processor may include a monitoring module. When the laser emitter starts rotating, the monitoring module monitors whether the laser receiver senses the beam. When the laser receiver senses the beam, the processor controls the laser emitter to stop rotating.

[0079] It should be noted that, referring to Figure 4 The sheet metal part is placed directly below the laser emitter. The greater the distance the vibrating component moves relative to the upper surface of the sheet metal part, the greater the relative distance between the vibrating component and the laser emitter. Since the laser receiver is placed on the upper surface of the vibrating component, the greater the distance the vibrating component moves relative to the laser emitter, the greater the relative distance between them. A greater distance for the laser receiver relative to the laser emitter requires the laser emitter to move the beam so that the laser receiver senses a larger angle of rotation. Similarly, a smaller distance for the vibrating component on the upper surface of the sheet metal part results in a smaller relative distance between the vibrating component and the laser emitter. Therefore, the smaller the distance the vibrating component moves relative to the laser emitter, the smaller the relative distance between them, and the smaller the angle of rotation the laser emitter needs to rotate the beam so that the laser receiver senses a smaller angle of rotation. Thus, this angle of rotation is positively correlated with the distance the vibrating component moves on the upper surface of the sheet metal part.

[0080] In this embodiment, the coating completion status of the sheet metal part can be determined by obtaining the rotation angle of the laser emitter and the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part. Specifically, the friction coefficient of the upper surface of the sheet metal part can be determined in various ways through experiments, and this embodiment does not impose any specific limitations on this. For example, the experimental apparatus includes: a sheet metal part, a sliding object, and a spring balance. The sheet metal part is fixed at an angle θ. A sliding object with a mass of m is placed on the upper surface of the sheet metal part. The force F experienced by the sliding object along the upper surface of the sheet metal part when it moves downward along the upper surface of the sheet metal part is measured and recorded by the spring balance. F = mgsinθ - μmgcosθ. Based on F, the mass of the sliding object, and the tilt angle θ of the sheet metal part, the current friction coefficient of the upper surface of the sheet metal part can be obtained.

[0081] Alternatively, the experimental setup includes a sheet metal part, a sliding object, and a spring balance. The sheet metal part is placed horizontally, and the sliding object is placed on the upper surface of the sheet metal part. A horizontal force F is continuously applied to the sliding object to make it move at a constant speed. When the sliding object moves at a constant speed, the horizontal forces are balanced, that is, the sliding friction force is equal to F. The coefficient of friction of the upper surface of the sheet metal part can be obtained according to the formula for calculating sliding friction force.

[0082] Through multiple experiments, the friction coefficient of the upper surface of the sheet metal part and the rotation angle of the laser emitter were obtained under different conditions after the sheet metal part was painted, and the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part was obtained. For example, when the sheet metal part is not being painted, the friction coefficient u_1 of the upper surface of the sheet metal part is obtained. Then, the sheet metal part is fixed at an angle, and the vibration component is placed on the upper surface of the sheet metal part directly below the laser emitter. The vibration component is controlled to start vibrating at a preset frequency and move downward along the upper surface of the sheet metal part using its own gravity until it stops after the vibration ends. The laser emitter is controlled to move until the laser receiver senses the beam emitted by the laser emitter and then controls the laser emitter to stop moving. The rotation angle α_1 of the laser emitter from the start to the stop is recorded. When the sheet metal part is not fully painted, the friction coefficient u_2 of the upper surface of the sheet metal part and the rotation angle α_2 of the laser emitter are obtained. For different painting conditions of the sheet metal part, the friction coefficient and rotation angle for the corresponding conditions are obtained respectively. When the sheet metal part is fully painted, the friction coefficient u_n of the upper surface of the sheet metal part and the rotation angle α_n of the laser emitter are obtained.

[0083] After obtaining the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part, the coating completion status of the sheet metal part can be determined by obtaining the rotation angle of the laser emitter and based on this mapping relationship.

[0084] In this embodiment, the coating inspection system includes a laser emitter and a laser receiver. The laser receiver is placed on the upper surface of the vibration assembly. After the vibration assembly stops vibrating and comes to rest, the laser emitter is controlled to rotate until the laser receiver senses the light beam emitted by the laser emitter and then controls the laser emitter to stop rotating. The rotation angle of the laser emitter from the start of rotation to the stop of rotation is recorded. Based on the mapping relationship between the rotation angle of the laser emitter and the friction coefficient of the sheet metal part, the coating completion status of the sheet metal part is determined. This replaces manual inspection of whether the sheet metal part has completed coating and improves the efficiency of identifying the coating completion status of the sheet metal part.

[0085] Optionally, the following may be included after step 103:

[0086] Completed sheet metal parts are sent to the next process for processing, while uncompleted sheet metal parts are placed in the abnormality marking area for rework.

[0087] In this embodiment of the application, by placing the sheet metal parts that have not been painted in the abnormal marking area for rework, the sheet metal parts that have not been painted in the abnormal marking area are further painted, thereby improving the success rate of painting the sheet metal parts.

[0088] Reference Figure 2, showing the step flowchart of another sheet metal part spraying detection and recognition method provided by the embodiments of the present application, as Figure 2 shown, the method specifically includes the following steps:

[0089] Step 201, obliquely fix the sheet metal part to be detected in the target area, and place the vibration component on the upper surface of the sheet metal part directly below the laser emitter;

[0090] This step can refer to the detailed description of step 101 and will not be elaborated here.

[0091] Step 202, adjust the preset frequency of the vibration component according to the length of the sheet metal part and the mass of the vibration component.

[0092] It should be noted that the preset frequency of the vibration component affects the distance that the vibration component moves downward along the upper surface of the sheet metal part within the same time. For example, when the preset frequencies of the vibration component are h_1 respectively, within time t, the distance that the vibration component moves downward along the upper surface of the sheet metal part is s_1; when the preset frequencies of the vibration component are h_2 respectively, within time t, the distance that the vibration component moves downward along the upper surface of the sheet metal part is s_2; when h_1 < h_2, within the same time t, s_1 < s_2.

[0093] The vibration component needs to move within the length range of the sheet metal part, obtain the moving distance of the vibration component on the upper surface of the sheet metal part, and determine the spraying completion situation of the sheet metal part according to the moving distance. Therefore, it is necessary to adjust the frequency of the vibration component according to the length of the sheet metal part so that the moving distance of the vibration component on the upper surface of the sheet metal part after stopping vibration is less than or equal to the length of the sheet metal part.

[0094] Exemplarily, when the length of the sheet metal part is L_1, control the preset frequency of the vibration component within the interval of [h_1, h_2] so that the moving distance of the vibration component along the upper surface of the sheet metal part in both the case of incomplete spraying and complete spraying is less than or equal to the length of the sheet metal part.

[0095] Step 203, control the vibration component to start vibrating at the preset frequency and move downward along the upper surface of the sheet metal part by its own gravity until it stops vibrating and remains stationary;

[0096] This step can refer to the detailed description of step 101 and will not be elaborated here.

[0097] Optionally, the spraying detection system further includes a laser emitter and a laser receiver, and the laser receiver is placed on the upper surface of the vibration component;

[0098] Step 204: Control the laser emitter to rotate until the laser receiver senses the beam emitted by the laser emitter, then control the laser emitter to stop rotating, and record the rotation angle of the laser emitter from the start of rotation to the stop of rotation; the rotation angle is positively correlated with the moving distance of the vibration component on the upper surface of the sheet metal part;

[0099] Here, the rotation tilt angle refers to the angle between the starting position of the laser emitter and the ending position where the laser emitter rotates the beam until the laser receiver senses the beam emitted by the laser emitter and stops rotating. For example, the rotation tilt angle is any angle between [0°, 90°].

[0100] Optionally, controlling the rotation of the laser emitter to instruct the laser receiver to stop rotating after sensing the laser beam emitted by the laser emitter may include:

[0101] After the vibration component stops vibrating and comes to a standstill, the laser emitter is controlled to rotate. When the laser receiver senses the beam emitted by the laser emitter, it generates a sensing command and sends this command to the processor. Upon receiving the command, the processor controls the laser emitter to stop rotating. Alternatively, the processor may include a monitoring module. When the laser emitter starts rotating, the monitoring module monitors whether the laser receiver senses the beam. When the laser receiver senses the beam, the processor controls the laser emitter to stop rotating.

[0102] It should be noted that, referring to Figure 4 The sheet metal part is placed directly below the laser emitter. The greater the distance the vibrating component moves relative to the upper surface of the sheet metal part, the greater the relative distance between the vibrating component and the laser emitter. Since the laser receiver is placed on the upper surface of the vibrating component, the greater the distance the vibrating component moves relative to the laser emitter, the greater the relative distance between them. A greater distance for the laser receiver relative to the laser emitter requires the laser emitter to move the beam so that the laser receiver senses a larger angle of rotation. Similarly, a smaller distance for the vibrating component on the upper surface of the sheet metal part results in a smaller relative distance between the vibrating component and the laser emitter. Therefore, the smaller the distance the vibrating component moves relative to the laser emitter, the smaller the relative distance between them, and the smaller the angle of rotation the laser emitter needs to rotate the beam so that the laser receiver senses a smaller angle of rotation. Thus, this angle of rotation is positively correlated with the distance the vibrating component moves on the upper surface of the sheet metal part.

[0103] For example, an unpainted sheet metal part and a painted sheet metal part are respectively fixed at an angle in the target area. When the sheet metal part is unpainted, after the vibration assembly stops moving on the upper surface of the sheet metal part, the laser emitter is controlled to rotate until the laser receiver senses the beam emitted by the laser emitter. After the laser receiver senses the beam emitted by the laser emitter, it generates a sensing command and sends the sensing command indicating that the beam has been sensed to the processor. After receiving the command, the processor controls the laser emitter to stop rotating and records the rotation angle α_1 of the laser emitter from the start of rotation to the stop of rotation. When the sheet metal part is painted, the rotation angle α_2 of the laser emitter from the start of rotation to the stop of rotation is recorded. Wherein, α_1 < α_2.

[0104] Step 205: Determine the completion status of the sheet metal coating based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part.

[0105] It should be noted that the coefficient of friction on the upper surface of the sheet metal part varies depending on the degree of coating completion, resulting in different movement distances of the vibration component along the upper surface. There is a mapping relationship between the coefficient of friction corresponding to the coating completion level of the upper surface and the movement distance of the vibration component along the upper surface. Furthermore, the rotation angle of the laser emitter is positively correlated with the movement distance of the vibration component along the upper surface. Therefore, a corresponding mapping relationship exists between the rotation angle and the coefficient of friction of the sheet metal part.

[0106] In this embodiment of the application, the friction coefficient of the upper surface of the sheet metal part and the rotation angle of the laser emitter were obtained under different conditions after the sheet metal part was painted through multiple experiments, and the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part was obtained. For example, when the sheet metal part is not painted, the friction coefficient u_1 of the upper surface of the sheet metal part is obtained by measuring the friction coefficient of the upper surface of the sheet metal part as proposed in step 2051. Then, the sheet metal part is fixed at an angle, and the vibration component is placed on the upper surface of the sheet metal part directly below the laser emitter. The vibration component is controlled to start vibrating at a preset frequency and move downward along the upper surface of the sheet metal part using its own gravity until it stops after the vibration ends. The laser emitter is controlled to move until the laser receiver senses the beam emitted by the laser emitter and then controls the laser emitter to stop moving. The rotation angle α_1 of the laser emitter from the start to the stop is recorded. When the sheet metal part is not fully painted, the friction coefficient u_2 of the upper surface of the sheet metal part and the rotation angle α_2 of the laser emitter are obtained. For different painting conditions of the sheet metal part, the friction coefficient and rotation angle of the corresponding conditions are obtained respectively. When the sheet metal part is fully painted, the friction coefficient u_n of the upper surface of the sheet metal part and the rotation angle α_n of the laser emitter are obtained. Through multiple experiments, the mapping relationship between the friction coefficient and the rotation angle of the upper surface of the sheet metal part can be obtained.

[0107] Optionally, step 205, which determines the coating completion status of the sheet metal part based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part, may include the following steps:

[0108] Step 2051: Determine the target coefficient of friction of the upper surface of the sheet metal part after the sheet metal part has been painted.

[0109] In this embodiment, the target friction coefficient of the upper surface of the sheet metal part can be determined experimentally in various ways, and this embodiment does not impose specific limitations on these methods. For example, the experimental setup includes: a sheet metal part, a sliding object, and a spring balance. The sheet metal part is fixed at an angle θ. A sliding object with mass m is placed on the upper surface of the sheet metal part. The force F exerted by the sliding object along the upper surface of the sheet metal part as it moves downwards along the upper surface is measured and recorded using the spring balance. F = mgsinθ - μmgcosθ. Based on F, the mass of the sliding object, and the tilt angle θ of the sheet metal part, the current friction coefficient of the upper surface of the sheet metal part can be obtained. In the experiment, this method is used to determine the target friction coefficient of the upper surface of the sheet metal part after the sheet metal part has been painted.

[0110] Alternatively, the experimental setup includes a sheet metal part, a sliding object, and a spring balance. The sheet metal part is placed horizontally, and the sliding object is placed on its upper surface. A horizontal force F is continuously applied to the sliding object to make it move at a constant speed. When the sliding object moves at a constant speed, the horizontal forces are balanced, meaning the sliding friction force equals F. The coefficient of friction of the upper surface of the sheet metal part can be obtained using the formula for calculating sliding friction. Using the same calculation method, the target coefficient of friction of the upper surface of the sheet metal part can be determined after the sheet metal part has been painted.

[0111] Step 2052: Based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part, determine a preset threshold for the rotation angle corresponding to the target friction coefficient;

[0112] Based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal obtained above, a preset threshold corresponding to the target friction coefficient can be determined when the target friction coefficient is determined after the sheet metal painting is completed.

[0113] Step 2053: When the rotation angle is greater than a preset threshold, the painting of the sheet metal part is determined to be completed.

[0114] In this embodiment, the coefficient of friction of the sheet metal part after painting is different from that before painting. Specifically, the coefficient of friction of the upper surface of the sheet metal part after painting is less than that of the upper surface before painting. According to the formula for calculating sliding friction, F = mgu*cosθ (where m is the mass of the vibration component, g is the constant of gravitational acceleration, and θ is the tilt angle of the sheet metal part), when other conditions remain unchanged, a decrease in the coefficient of friction of the upper surface of the sheet metal part results in a corresponding decrease in the sliding friction force experienced by the vibration component as it moves along the upper surface. When the vibration component moves downwards along the upper surface of the sheet metal part, the direction of the sliding friction force experienced by the vibration component is opposite to the direction of its movement along the upper surface. As the coefficient of friction of the upper surface decreases, the sliding friction force experienced by the vibration component decreases, while the component of the vibration component's weight along the upper surface remains unchanged. Therefore, the force opposite to the direction of the vibration component's movement decreases, and the downward movement distance of the vibration component along the upper surface of the sheet metal part increases.

[0115] The greater the distance the vibration assembly moves relative to the upper surface of the sheet metal part, the greater the relative distance between the vibration assembly and the laser emitter. Since the laser receiver is placed on the upper surface of the vibration assembly, the greater the distance the vibration assembly moves relative to the laser emitter, the greater the relative distance between the laser receiver and the laser emitter. The greater the distance the laser receiver moves relative to the laser emitter, the greater the angle at which the laser emitter needs to rotate its beam so that the laser receiver senses the beam.

[0116] Therefore, the lower the coefficient of friction on the upper surface of the sheet metal part, the greater the distance the vibration component travels along the upper surface of the sheet metal part, and the larger the rotation angle of the laser emitter. Based on the mapping relationship between the rotation angle and the coefficient of friction of the sheet metal part, a preset threshold corresponding to the target coefficient of friction can be determined when the target coefficient of friction is determined under the condition that the sheet metal part is fully coated. When the rotation angle is greater than this threshold, it indicates that the coefficient of friction on the upper surface of the sheet metal part is less than the target coefficient of friction, that is, the coating of the upper surface of the sheet metal part is complete. When the rotation angle is less than this threshold, it indicates that the coefficient of friction on the upper surface of the sheet metal part is greater than the target coefficient of friction, that is, the coating of the upper surface of the sheet metal part is incomplete.

[0117] Optionally, the sheet metal part spray coating detection and identification method provided in this application embodiment may further include the following steps:

[0118] Step 206: Send the finished sheet metal parts to the next process for processing, and place the unfinished sheet metal parts in the abnormality marking area for rework.

[0119] One method is to place the unfinished sheet metal parts in the abnormal marking area for rework, which involves adding paint to the upper surface of the unfinished sheet metal parts to ensure that the sheet metal parts are fully painted.

[0120] Device Examples

[0121] like Figure 3 As shown, Figure 3 This illustration shows a logic block diagram of a sheet metal part coating detection and identification device according to an embodiment of this application. The device may include:

[0122] The first control module is used to control the vibration component to start vibrating at a preset frequency and move downward along the upper surface of the sheet metal part using its own gravity until it stops after the vibration ends.

[0123] The first determining module is used to determine the completion status of the sheet metal coating based on the moving distance of the vibration component on the upper surface of the sheet metal component.

[0124] Optionally, the first determining module includes:

[0125] The second control module is used to control the rotation of the laser emitter until the laser receiver senses the beam emitted by the laser emitter and then controls the laser emitter to stop rotating. The rotation angle of the laser emitter from the start of rotation to the stop of rotation is recorded. The rotation angle is positively correlated with the distance the vibration component moves on the upper surface of the sheet metal part.

[0126] The second determining module is used to determine the completion status of the sheet metal coating based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal.

[0127] Optionally, the second determining module includes:

[0128] The third determining module is used to determine the target friction coefficient of the upper surface of the sheet metal part after the sheet metal part has been painted.

[0129] The fourth determining module is used to determine a preset threshold value of the rotation angle corresponding to the target friction coefficient based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part.

[0130] The fifth determining module is used to determine that the painting of the sheet metal part is complete when the rotation angle is greater than a preset threshold.

[0131] Optionally, the first control module includes:

[0132] The third control module includes a motor inside the vibration component. The motor is controlled to start rotating by a scheduling signal so that the vibration component starts to vibrate at a preset frequency and moves downward along the upper surface of the sheet metal part by its own gravity until it stops vibrating. The vibration component includes a motor inside.

[0133] Optionally, the first control module includes:

[0134] An adjustment module is used to adjust the preset frequency of the vibration component according to the length of the sheet metal part and the mass of the vibration component.

[0135] Optionally, the device further includes:

[0136] The placement module sends the painted sheet metal parts to the next process, while the unpainted sheet metal parts are placed in the abnormality marking area for rework.

[0137] In summary, the sheet metal part coating detection and identification device provided in this application includes: a fixing module for fixing the sheet metal part to be detected at an angle in the target area, and placing the vibration component on the upper surface of the sheet metal part directly below the laser emitter; a first control module for controlling the vibration component to start vibrating at a preset frequency and move downward along the upper surface of the sheet metal part using its own gravity until it stops after vibration; and a first determination module for determining the coating completion status of the sheet metal part based on the movement distance of the vibration component on the upper surface of the sheet metal part. Therefore, by determining the coating completion status of the sheet metal part based on the movement distance of the vibration component on the upper surface of the sheet metal part, the device achieves autonomous identification of whether air conditioning sheet metal parts have completed coating, improving factory production efficiency and reducing maintenance costs.

[0138] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described sheet metal coating detection and identification method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0139] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0140] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the related technology, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0141] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for detecting and identifying paint coating on sheet metal parts, characterized in that, Applied to a spray coating inspection system, the spray coating inspection system including a vibration component, the method includes: The sheet metal part to be tested is fixed at an angle in the target area, and the vibration component is placed on the upper surface of the sheet metal part; The vibration component is controlled to start vibrating at a preset frequency and move downward along the upper surface of the sheet metal part using its own gravity until it stops after the vibration ends. The completion status of the sheet metal coating is determined based on the distance the vibration assembly moves on the upper surface of the sheet metal part.

2. The method according to claim 1, characterized in that, The coating inspection system further includes a laser emitter and a laser receiver, the laser receiver being placed on the upper surface of the vibration assembly; determining the coating completion status of the sheet metal part based on the movement distance of the vibration assembly on the upper surface of the sheet metal part includes: The laser emitter is controlled to rotate until the laser receiver senses the beam emitted by the laser emitter, after which the laser emitter stops rotating. The rotation angle of the laser emitter from the start of rotation to the stop of rotation is recorded. The rotation angle is positively correlated with the rotation distance of the vibration component on the upper surface of the sheet metal part. The coating completion status of the sheet metal part is determined based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part.

3. The method according to claim 2, characterized in that, The determination of the coating completion status of the sheet metal part based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part includes: The target coefficient of friction of the upper surface of the sheet metal part after the sheet metal part has been painted. Based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part, a preset threshold value for the rotation angle corresponding to the target friction coefficient is determined; When the rotation angle is greater than a preset threshold, the painting of the sheet metal part is determined to be complete.

4. The method according to claim 1, characterized in that, The control of the vibration component to start vibrating at a preset frequency and move downwards along the upper surface of the sheet metal part using its own gravity until it stops vibrating includes: The vibration component is equipped with a motor. The motor is controlled by a scheduling signal to start rotating, so that the vibration component starts to vibrate at a preset frequency and moves downward along the upper surface of the sheet metal part by its own gravity until it stops vibrating.

5. The method according to claim 1, characterized in that, The method further includes: The preset frequency of the vibration component is adjusted according to the length of the sheet metal part and the mass of the vibration component.

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: Completed sheet metal parts are sent to the next process for processing, while uncompleted sheet metal parts are placed in the abnormality marking area for rework.

7. A sheet metal parts coating detection and identification device, characterized in that, The device includes: The fixing module fixes the sheet metal part to be tested at an angle in the target area, and the vibration component is placed on the upper surface of the sheet metal part directly below the laser emitter; The first control module is used to control the vibration component to start vibrating at a preset frequency and move downward along the upper surface of the sheet metal part using its own gravity until it stops after the vibration ends. The first determining module is used to determine the completion status of the sheet metal coating based on the moving distance of the vibration component on the upper surface of the sheet metal component.

8. The apparatus according to claim 7, characterized in that, A laser receiver is placed on the upper surface of the vibration component; the first determining module includes: The second control module is used to control the rotation of the laser emitter until the laser receiver senses the beam emitted by the laser emitter and then controls the laser emitter to stop rotating. The rotation angle of the laser emitter from the start of rotation to the stop of rotation is recorded. The rotation angle is positively correlated with the distance the vibration component moves on the upper surface of the sheet metal part. The second determining module is used to determine the completion status of the sheet metal coating based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal.

9. The apparatus according to claim 8, characterized in that, The second determining module includes: The third determining module is used to determine the target friction coefficient of the upper surface of the sheet metal part after the sheet metal part has been painted. The fourth determining module is used to determine a preset threshold value of the rotation angle corresponding to the target friction coefficient based on the mapping relationship between the rotation angle and the friction coefficient of the sheet metal part. The fifth determining module is used to determine that the painting of the sheet metal part is complete when the rotation angle is greater than a preset threshold.

10. The apparatus according to claim 7, characterized in that, The first control module includes: The third control module includes a motor inside the vibration component. The motor is controlled to start rotating by a scheduling signal so that the vibration component starts to vibrate at a preset frequency and moves downward along the upper surface of the sheet metal part by its own gravity until it stops vibrating. The vibration component includes a motor inside.

11. The apparatus according to claim 7, characterized in that, The first control module includes: An adjustment module is used to adjust the preset frequency of the vibration component according to the length of the sheet metal part and the mass of the vibration component.

12. The apparatus according to any one of claims 7 to 11, wherein the apparatus further comprises: The placement module sends the painted sheet metal parts to the next process, while the unpainted sheet metal parts are placed in the abnormality marking area for rework.

13. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions, which, when executed by a processor, implement the sheet metal coating detection and identification method according to any one of claims 1 to 6.

Images