Method for spraying handle cover plate of streamlined vehicle body

Abstract

The application relates to a method for spraying a handle cover plate of a streamlined vehicle body, comprising the following steps: obtaining an included angle a between a main paint spraying mist and an oversprayed paint mist sprayed by a spraying cup, and a spraying range diameter of the main paint spraying mist; planning a door plate spraying track of the spraying cup for vertically spraying a rear door of the vehicle body according to the spraying range diameter, and the door plate spraying track at least covers an upper edge of the rear door of the vehicle body; obtaining a highest boundary line of the oversprayed paint mist sprayed on the handle cover plate according to the door plate spraying track and the included angle a between the main paint spraying mist and the oversprayed paint mist; spraying the handle cover plate according to the highest boundary line, and the spraying area comprises an upper spraying area and a lower spraying area; planning a cover plate spraying track to spray the upper spraying area alone, and synchronously spraying the lower spraying area and the rear door of the vehicle body by using the door plate spraying track. The application simplifies the spraying track of the handle cover plate, the lower spraying area of the handle cover plate does not need to establish a spraying track for spraying alone, and the problems of overspraying and sagging of the cover plate and the handle are solved.

Description

Technical Field

[0001] This application relates to the field of vehicle body painting technology, and in particular to a method for painting the handle cover of a streamlined vehicle body along with the vehicle. Background Technology

[0002] During automobile manufacturing, the car body needs to be painted to provide protection and enhance its appearance. Previously, this painting was primarily done manually. However, with technological advancements, car manufacturers now employ their own painting robots. These robots utilize the multi-degree-of-freedom movement of robotic arms to paint from various angles and positions, achieving a more uniform finish compared to manual painting. Painting robots typically use a technique where paint is splashed onto the guide cone surface of a rotary cup atomizer before being sprayed onto the target workpiece, resulting in stable atomization and color consistency.

[0003] In related technologies, painting workshops currently adapt to flexible production of different vehicle models. The fuel tank cap is often designed as a separate unit. In order to achieve high-quality painting and appearance quality requirements, fixed brackets are usually used to fix the door handle, fuel filler cap or charging port cap to the rear of the vehicle for simultaneous painting to reduce color difference.

[0004] For example, Chinese patent CN215141247U discloses a tool for on-vehicle spraying of fuel filler caps. This tool features an L-shaped door fixing rod, above which a frame-shaped fuel filler cap limiting frame is welded. The size of the limiting frame is slightly larger than the fuel filler cap, allowing the cap to be placed within it. A cover support rod is welded to the limiting frame, and a cover fixing rod is welded to the support rod. This invention can reduce color difference issues when spraying individual fuel filler caps; reduce manual opening and closing of the topcoat, improve topcoat production efficiency, and reduce employee labor intensity. The cover is adhered to the base, detachably connected to the base via screws, or snap-fitted to the base.

[0005] However, the aforementioned public documents did not consider the independent countermeasures for each vehicle model structure. During the on-board painting process, the painting of the handle or cover plate will create a new painting trajectory, which will cause the following problems: 1. The trajectory of painting the upper part of the door will interfere with the on-board painting of the cover plate and the lower surface of the handle, resulting in a thicker clear coat film on the lower surface of the handle and cover plate, and making the paint prone to running; the problem of paint running on the cover plate and handle needs to be solved; 2. The clear coat of the upper edge of the door cannot increase the flow rate due to interference with the handle and cover plate, resulting in orange peel on the main visual surface of the upper part of the rear door; the problem of orange peel on the upper part of the rear door needs to be solved; 3. The multiple trajectory paths of the cover plate and handle will generate a total of 10-14 seconds of painting time, resulting in an insufficient painting cycle time for the vehicle body, which needs to be solved by adjusting the trajectory to solve the problem of long cycle time. Summary of the Invention

[0006] This application provides a method for spraying handle covers on streamlined vehicle bodies during vehicle operation, in order to solve the problem in related technologies where spraying handle covers and handles during vehicle operation results in multiple spraying trajectory paths for the handle covers and handles, leading to a long spraying time cycle for the vehicle body.

[0007] This application provides a method for spraying handle cover plates of streamlined vehicle bodies during vehicle operation, including:

[0008] Obtain the angle α between the main spray mist and the overspray mist ejected from the spray cup, and the spray width diameter of the main spray mist;

[0009] The spray pattern of the door panel of the vehicle body rear door is planned according to the spray diameter and the spray cup is used for vertical spraying. The door panel spray pattern shall at least cover the upper edge of the vehicle body rear door.

[0010] Based on the door panel spraying trajectory and the angle α between the main spray paint mist and the overspray paint mist, obtain the highest boundary line of the overspray paint mist sprayed on the handle cover plate.

[0011] The handle cover is divided into spray painting zones according to the highest boundary line, where the spray painting zones include an upper spray painting area and a lower spray painting area.

[0012] The planned cover plate spraying trajectory is used to spray the upper spraying area separately, while the door panel spraying trajectory is used to spray the lower spraying area and the rear door of the vehicle body simultaneously.

[0013] The method for painting the handle cover of the streamlined vehicle body in this application first measures the angle α between the main spray paint mist and the overspray paint mist of the spray cup, as well as the spray width diameter of the main spray paint mist, so as to determine the spray width of the spray cup.

[0014] Secondly, the spray cup axis is perpendicular to the spraying area of ​​the rear door of the vehicle body, and the main spray paint mist covers the upper edge of the rear door of the vehicle body, providing a larger spraying window for the paint film formation on the upper edge of the rear door of the vehicle body, which effectively improves the orange peel condition of the upper part of the rear door.

[0015] Next, a fixture is made to be placed above the rear door of the vehicle. The handle cover is positioned on the fixture perpendicular to the spray direction of the overspray mist. The overspray mist generated by the spray cup is used to spray the handle cover installed on the fixture along with the vehicle, which solves the problem of dripping at the lower edge after the cover and handle are sprayed separately along with the vehicle.

[0016] Then, based on the angle between the main spray paint mist and the overspray paint mist, the spraying size of the overspray paint mist on the lower end of the handle cover is measured, and the upper and lower ends of the handle cover are divided. The lower end of the handle cover is sprayed with overspray paint mist along the same trajectory as the rear door of the vehicle body. When the spraying cup is spraying the upper end of the rear door of the vehicle body, the overspray paint mist generated by the spraying cup is used to achieve the spraying of the lower end of the handle cover.

[0017] The upper part of the handle cover is sprayed separately with a dedicated spraying path, reducing the number of spraying paths by 1-3 on each side of the vehicle body. This simplifies the spraying path for the cover and handle. The lower part of the handle cover does not need to be sprayed separately with a dedicated spraying path, saving the corresponding spraying flow and cycle time, and improving the work efficiency of vehicle body painting.

[0018] In some embodiments, obtaining the angle α between the main paint mist and the overspray mist ejected from the spray cup specifically includes:

[0019] The spray cup is suspended inside the spherical container, with the spray cup positioned at the center of the spherical container.

[0020] The spray cup atomizes the paint at a set flow rate and rotation speed, forming a main spray mist surface and an overspray mist surface inside a spherical container;

[0021] Connect the center point of the annular area of ​​the main spray paint mist surface to the center of the sphere to form the first line, and connect the center point of the cross section passing through the spray paint mist surface to the center of the sphere to form the second line.

[0022] The angle between the first and second lines is the angle α between the main spray paint mist and the overspray paint mist.

[0023] In some embodiments, obtaining the spray width diameter of the main paint mist specifically includes:

[0024] Lay out paper of the set size, and position the spray nozzle above the paper and perpendicular to it;

[0025] After adjusting the distance between the spray cup and the paper, spray the coating onto the paper by atomizing the coating with the set flow rate and speed.

[0026] The main spray paint mist sprayed on the paper has a circular structure. The outer diameter of the main spray paint mist surface is measured with a ruler, which is the spray width diameter of the main spray paint mist.

[0027] In some embodiments, the spraying trajectory of the spraying rotary cup for vertical spraying of the vehicle's rear door panel is planned according to the spray width diameter, specifically including:

[0028] A rectangular structure is established with the distance between the spray cup and the rear door of the vehicle body as the length and the diameter of the main spray mist as the width.

[0029] The top vertex of one of the bottom edges of the rectangular structure coincides with the top edge of the rear door of the vehicle, so that the main paint mist covers the top edge of the rear door of the vehicle, forming the door panel spraying trajectory.

[0030] One centerline of the rectangular structure is perpendicular to the painting area of ​​the rear door of the vehicle body. Measure the angle b between one centerline of the rectangular structure and the Z-axis of the vehicle body.

[0031] The angle c between the spray direction of the paint mist and the Z-axis of the vehicle body is calculated based on the included angles b and a, where c = 180° - ab.

[0032] In some embodiments, the process further includes obtaining the highest boundary line of the paint mist sprayed on the handle cover plate before:

[0033] A fixture is installed above the rear door of the vehicle body to make the handle cover plate perpendicular to the paint spray mist;

[0034] The angle between the plane of the fixture and the Z-axis of the vehicle body is d, where d = 90° - c;

[0035] Fix the fixture to the top of the rear door of the vehicle body using clamping springs and pins according to the angle d between the fixture and the Z-axis.

[0036] Secure the handle cover to the fixture and wait for the spray cup to spray it.

[0037] In some embodiments, the handle cover includes a door handle cover, a fuel filler cap cover, and a charging port cover, and there are four door handle covers, one fuel filler cap cover and one charging port cover.

[0038] Install two of the door handle covers on a fixture above one of the rear doors of the vehicle, and install the other two door handle covers on a fixture above the other rear door of the vehicle.

[0039] The fuel filler cap is mounted on a fixture above one of the vehicle's rear doors, and the charging port cap is mounted on a fixture above the other vehicle's rear door.

[0040] In some embodiments, the two door handle covers are respectively arranged on both sides of the fuel filler cap or the charging port cover, and the distance between the door handle cover and the fuel filler cap or the charging port cover is greater than 17cm.

[0041] In some embodiments, when dividing the handle cover into paint sections according to the highest boundary line, it is also necessary to determine the paint condition of the handle cover when painting the rear door of the vehicle body.

[0042] If the paint finish on the handle cover reaches the required spraying quality, then the handle cover is divided into upper and lower sections according to the lower spraying area.

[0043] If the paint finish on the handle cover does not meet the required spraying quality, reduce the lower spraying area and then divide the handle cover into upper and lower sections.

[0044] In some embodiments, the sprayed area on the upper edge of the rear door of the vehicle body is a streamlined shape with the arc surface facing upwards.

[0045] In some embodiments, the distance between the spraying rotary cup and the spraying area of ​​the rear door of the vehicle body is 15-20cm.

[0046] The beneficial effects of the technical solution provided in this application include:

[0047] This application provides a method for painting the handle cover of a streamlined vehicle body while in use. The method first obtains the angle α between the main paint mist and the overspray mist sprayed from the spray nozzle, as well as the spray width diameter of the main paint mist. Next, based on the spray width diameter, a vertical spray trajectory is planned for the spray nozzle to paint the rear door panel of the vehicle body, ensuring that the spray trajectory covers at least the upper edge of the rear door. Then, based on the spray trajectory and the angle α between the main paint mist and the overspray mist, the highest boundary line of the overspray mist sprayed on the handle cover is obtained. The handle cover is then divided into painting zones based on the highest boundary line, including an upper painting area and a lower painting area. Finally, the upper painting area is painted separately using the planned cover painting trajectory, while the lower painting area and the rear door are painted simultaneously using the door painting trajectory.

[0048] Therefore, the method for on-vehicle painting of the handle cover of the streamlined vehicle body in this application first measures the angle α between the main spray mist and the overspray mist of the spray cup, as well as the spray width diameter of the main spray mist, to determine the spray width size of the spray cup. Secondly, based on the spray width diameter, the spray cup is planned to spray the door panel of the rear door vertically, ensuring that the spray path covers at least the upper edge of the rear door, providing a larger spraying window for paint film formation on the upper edge of the rear door and effectively improving the orange peel effect on the upper part of the rear door. Next, a fixture is installed above the rear door, and the handle cover is positioned perpendicular to the spray direction of the overspray mist on the fixture. The overspray mist generated by the spray cup is used to spray the handle cover mounted on the fixture on-vehicle, solving the problem of dripping at the lower edge of the handle cover after separate on-vehicle painting.

[0049] Then, based on the door panel spraying trajectory and the angle α between the main paint mist and the overspray mist, the highest boundary line of the overspray mist sprayed on the handle cover is obtained. The handle cover is then divided into spraying zones according to this highest boundary line. The lower spraying area of ​​the handle cover uses the overspray mist sprayed along the same trajectory as the rear door of the vehicle. When the spraying cup is spraying the upper part of the rear door, the overspray mist generated by the spraying cup is used to achieve the spraying of the lower spraying area of ​​the handle cover. The upper spraying area of ​​the handle cover is sprayed separately using a separate spraying trajectory, reducing the number of spraying trajectories by 1-3 on each side of the vehicle body, simplifying the handle cover spraying trajectory. The lower spraying area of ​​the handle cover does not require a separate spraying trajectory, saving corresponding spraying flow and cycle time, and improving the efficiency of vehicle body spraying. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0051] Figure 1 This is a flowchart of the trajectory planning method according to an embodiment of this application;

[0052] Figure 2 This is a side view of the structure in which the handle cover is mounted on the vehicle body using a fixture, according to an embodiment of this application.

[0053] Figure 3 This is a schematic diagram illustrating the structure for measuring the angle between the main paint mist and the overspray mist in an embodiment of this application.

[0054] Figure 4 This is a schematic diagram of the structure for measuring the spray pattern diameter of the main paint mist in an embodiment of this application;

[0055] Figure 5 This application embodiment shows the main structural view of the handle cover plate mounted on the vehicle body using a fixture.

[0056] Figure label:

[0057] 1. Spraying rotary cup; 2. Main spray paint mist; 3. Overspray paint mist; 4. Spherical container; 5. Paper; 6. Rear door of vehicle; 7. Fixture; 8. Handle cover; 9. Door handle cover; 10. Fuel filler cap cover. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] This application provides a method for spraying handle covers on streamlined vehicle bodies during vehicle operation, which solves the problem in related technologies where spraying handle covers and handles during vehicle operation results in multiple spraying trajectory paths for the handle covers and handles, leading to a long spraying time cycle for the vehicle body.

[0060] See Figure 1 and Figure 5 As shown in the figure, this application embodiment provides a method for spraying handle cover plates of streamlined vehicle bodies with the vehicle, the trajectory planning method including the following steps:

[0061] Step 101: The spray cup 1 atomizes the paint to form the main spray paint mist 2 and the overspray paint mist 3. The overspray paint mist 3 surrounds the outer periphery of the main spray paint mist 2. The included angle α between the main spray paint mist 2 and the overspray paint mist 3 is measured.

[0062] Step 102: After the spraying rotary cup 1 atomizes the paint, it is sprayed onto the spraying surface at a set distance. The main spray paint mist 2 sprayed from the spraying rotary cup 1 forms a ring-shaped main spray paint mist surface on the spraying surface. Then, the diameter of the main spray paint mist surface is measured to obtain the spray width diameter of the main spray paint mist.

[0063] Step 103: According to the spray pattern diameter, the axis of the spray cup 1 is perpendicular to the spraying area of ​​the rear door 6 of the vehicle body. The spraying area of ​​the upper edge of the rear door 6 of the vehicle body is a streamlined shape with the arc surface facing upward. The main spray paint mist 2 covers the upper edge of the rear door 6 of the vehicle body, and the door panel spraying trajectory is planned to provide a larger spraying window for the paint film formation on the upper edge of the rear door 6 of the vehicle body, which effectively improves the orange peel state of the upper part of the rear door.

[0064] Step 104: Make a fixture 7 that is placed above the rear door 6 of the vehicle body, and make the handle cover plate 8 perpendicular to the spraying direction of the overspray mist 3 on the fixture 7. When the main spray mist 2 of the spraying cup 1 sprays the rear door 6 of the vehicle body vertically, the overspray mist 3 can simultaneously spray the handle cover plate 8 vertically.

[0065] Step 105: Spray the rear door 6 of the vehicle body with the spray cup 1 according to the door panel spraying trajectory. Based on the door panel spraying trajectory and the angle α between the main spray paint mist 2 and the overspray paint mist 3, obtain the highest boundary line of the overspray paint mist spray 3 on the handle cover plate 8.

[0066] Step 106: Divide the handle cover plate 8 into spray painting zones according to the highest boundary line. The spray painting zones include an upper spray painting area and a lower spray painting area. Plan the cover plate spray painting trajectory to spray the upper spray painting area separately, and use the door panel spray painting trajectory to spray the lower spray painting area and the rear door of the vehicle body simultaneously.

[0067] The method for painting the handle cover of the streamlined vehicle body according to this application embodiment first measures the angle α between the main spray mist 2 and the overspray mist 3 of the spray cup 1, as well as the spray width diameter of the main spray mist 2, to determine the spray width size of the spray cup 1. Secondly, based on the spray width diameter, the spray cup 1 is planned to vertically spray the door panel of the rear door of the vehicle body. The door panel spray trajectory at least covers the upper edge of the rear door, providing a larger spraying window for paint film formation on the upper edge of the rear door, effectively improving the orange peel effect on the upper part of the rear door.

[0068] Next, a fixture 7 is installed above the rear door of the vehicle body, and the handle cover plate 8 is positioned on the fixture 7 perpendicular to the spraying direction of the overspray mist 3. The overspray mist 3 generated by the spraying rotary cup 1 is used to spray the handle cover plate 8 installed on the fixture 7 along with the vehicle, which solves the problem of dripping at the lower edge of the handle cover plate 8 after it is sprayed separately along with the vehicle.

[0069] Then, based on the door panel spraying trajectory and the angle α between the main spray paint mist 2 and the overspray paint mist 3, the highest boundary line of the overspray paint mist 3 sprayed on the handle cover plate 8 is obtained. The handle cover plate 8 is divided into spraying zones according to the highest boundary line. The lower spraying area of ​​the handle cover plate 8 is sprayed with the overspray paint mist 3 along the same trajectory as the rear door of the vehicle body. When the spraying cup 1 is spraying the upper part of the rear door of the vehicle body, the overspray paint mist 3 generated by the spraying cup 1 is used to achieve the spraying of the lower spraying area of ​​the handle cover plate 8.

[0070] The upper part of the handle cover 8 is sprayed separately by establishing a separate spraying trajectory, reducing 1-3 spraying trajectories on each side of the vehicle body, thus simplifying the spraying trajectory of the handle cover. The lower part of the handle cover 8 does not need to be sprayed separately by establishing a separate spraying trajectory, saving the corresponding spraying flow and cycle time, and improving the work efficiency of vehicle body spraying.

[0071] In some alternative embodiments, see Figure 3 As shown in the figure, this application embodiment provides a method for spraying handle covers on a streamlined vehicle body. The trajectory planning method obtains the included angle α between the main paint mist 2 and the overspray paint mist 3, specifically including the following steps:

[0072] Step 101a: Suspend the spraying cup 1 inside the spherical container 4, and position the spraying cup 1 at the center of the spherical container 4.

[0073] Step 101b: The spray cup 1 atomizes the paint at the set flow rate and rotation speed, forming the main spray paint mist surface and the overspray paint mist surface in the spherical container 4.

[0074] Step 101c: Connect the center point of the annular part of the main spray paint mist surface to the center of the sphere to form the first line, and connect the center point of the cross section of the spray paint mist surface to the center of the sphere to form the second line.

[0075] Step 101d: Measure the angle between the first line and the second line, which is the angle α between the main spray paint mist 2 and the overspray paint mist 3.

[0076] In some alternative embodiments, see Figure 4 As shown in the figure, this application embodiment provides a method for spraying the handle cover of a streamlined vehicle body with the vehicle. The trajectory planning method measures and obtains the spray diameter of the main paint mist 2, specifically including the following steps:

[0077] Step 102a: Lay a sheet of paper 5 of a set size on the ground, and place the spray nozzle 1 above the sheet of paper 5 and perpendicular to the sheet of paper 5.

[0078] Step 102b: After adjusting the distance between the spray cup 1 and the paper 5, the preferred distance between the spray cup 1 and the paper 5 is the spraying distance between the spray cup 1 and the rear door 6 of the vehicle body. The distance between the spray cup 1 and the spraying area of ​​the rear door 6 of the vehicle body is 15-20cm. The spray cup 1 atomizes the paint and sprays it onto the paper 5 at the set flow rate and rotation speed.

[0079] Step 102c: The main spray paint mist surface sprayed on the paper 5 has a circular structure. The outer diameter of the main spray paint mist surface is measured with a ruler, which is the spray width diameter of the main spray paint mist 2.

[0080] In some alternative embodiments, see Figure 5 As shown in the figure, this application provides a method for spraying the handle cover of a streamlined vehicle body with the vehicle. The trajectory planning method plans the spraying trajectory of the spraying rotary cup for vertical spraying of the rear door panel of the vehicle body according to the spray width diameter, specifically including the following steps:

[0081] Step 103a: Construct a rectangular structure with the spray area of ​​the spray cup 1 at the distance from the rear door 6 of the vehicle body as the length and the spray diameter of the main spray mist 2 as the width.

[0082] Step 103b: The top vertex of one side of the bottom of the rectangular structure coincides with the upper edge of the rear door 6 of the vehicle body, so that the main paint mist 2 can cover the upper edge of the rear door 6 of the vehicle body, forming a rear door spraying trajectory, providing a larger spraying window for the paint film formation on the upper edge of the rear door 6 of the vehicle body, and effectively improving the orange peel condition of the upper part of the rear door.

[0083] Step 103c: Make one center line of the rectangular structure perpendicular to the painting area of ​​the rear door 6 of the vehicle body, and measure the angle b between one center line of the rectangular structure and the Z-axis of the vehicle body.

[0084] Step 103d: Calculate the angle c between the spraying direction of the overspray mist 3 and the Z-axis of the vehicle body based on the included angles b and a, where c = 180° - ab.

[0085] In some alternative embodiments, see Figure 5 As shown, this application embodiment provides a method for spraying paint onto the handle cover plate of a streamlined vehicle body. The trajectory planning method includes the following steps before obtaining the highest boundary line of the paint mist 3 sprayed on the handle cover plate 8:

[0086] Step 104a: A fixture 7 is set above the rear door of the vehicle body so that the handle cover plate 8 is perpendicular to the overspray mist 3, so that the handle cover plate 8 is perpendicular to the spraying direction of the overspray mist 3 on the fixture 7.

[0087] Step 104b: The angle between the plane of fixture 7 and the Z-axis of the vehicle body is d, where d = 90° - c.

[0088] Step 104c: Make fixture 7 according to the angle d between fixture 7 and Z-axis, and fix fixture 7 to the inner panel of the rear door 6 of the vehicle body using clamping spring and pin, and position it above the rear door 6 of the vehicle body.

[0089] Step 104d: Fix the handle cover plate 8 onto the fixture 7 and wait for the spraying rotary cup 1 to spray the handle cover plate 8.

[0090] In some alternative embodiments, see Figure 2 As shown in the embodiment of this application, a method for spraying the handle cover of a streamlined vehicle body with the vehicle is provided. In the trajectory planning method, the handle cover 8 includes a door handle cover 9, a fuel filler cover 10, and a charging port cover. There are four door handle covers 9, and one fuel filler cover 10 and one charging port cover 10.

[0091] Two of the door handle covers 9 are installed on the fixture 7 above one of the rear doors 6 of the vehicle body, and the other two door handle covers 9 are installed on the fixture 7 above the other rear door 6 of the vehicle body.

[0092] The fuel filler cap 10 is mounted on a fixture 7 above one of the rear doors 6 of the vehicle body, and the charging port cap is mounted on a fixture 7 above the other rear door 6 of the vehicle body. Two door handle caps 9 are respectively arranged on both sides of the fuel filler cap 10 or the charging port cap, and the distance between the door handle cap 9 and the fuel filler cap 10 or the charging port cap is greater than 17cm.

[0093] The gap between the door handle cover 9 and the fuel filler cap 10 or the charging port cover is greater than 17cm, which allows the paint mist 3 to smoothly enter between the door handle cover 9 and the fuel filler cap 10 or the charging port cover. This paint mist can not only spray the outer surface of the door handle cover 9 and the fuel filler cap 10 or the charging port cover, but also spray the sides of the door handle cover 9 and the fuel filler cap 10 or the charging port cover.

[0094] In some alternative embodiments, see Figure 5 As shown, this application embodiment provides a method for painting the handle cover plate of a streamlined vehicle body along with the vehicle. In the trajectory planning method, when dividing the handle cover plate 8 into painting zones according to the highest boundary line, it is also necessary to determine the painting status of the handle cover plate 8 when painting the rear door of the vehicle body.

[0095] If the paint finish on the handle cover 8 reaches the required spraying quality, then the handle cover 8 is divided into upper and lower sections according to the lower spraying area.

[0096] If the paint finish on the handle cover does not meet the required spraying quality, reduce the lower spraying area and then divide the handle cover 8 into upper and lower sections.

[0097] Working principle

[0098] This application provides a method for painting the handle cover of a streamlined vehicle body while it is in use. The method first obtains the angle α between the main paint mist 2 and the overspray mist 3 sprayed from the spray cup 1, as well as the spray width diameter of the main paint mist 2. Then, based on the spray width diameter, it plans a vertical spraying trajectory for the door panel of the rear door of the vehicle body using the spray cup 1, wherein the door panel spraying trajectory at least covers the upper edge of the rear door. Next, based on the door panel spraying trajectory and the angle α between the main paint mist 2 and the overspray mist 3, it obtains the highest boundary line of the overspray mist 3 sprayed on the handle cover 8. Then, it divides the handle cover 8 into spraying zones based on the highest boundary line, wherein the spraying zones include an upper spraying area and a lower spraying area. Finally, it plans the cover spraying trajectory to spray the upper spraying area separately, and simultaneously sprays the lower spraying area and the rear door of the vehicle body using the door panel spraying trajectory.

[0099] Therefore, the method for on-vehicle painting of the handle cover plate of the streamlined vehicle body in this application first measures the included angle α between the main spray mist 2 and the overspray mist 3 of the spray cup 1, as well as the spray width diameter of the main spray mist 2, to determine the spray width size of the spray cup. Secondly, based on the spray width diameter, the spray cup 1 is planned to vertically spray the door panel of the rear door 6 of the vehicle body. This door panel spray trajectory at least covers the upper edge of the rear door, providing a larger spraying window for paint film formation on the upper edge of the rear door, effectively improving the orange peel appearance of the upper part of the rear door. Next, a fixture 7 is installed above the rear door of the vehicle body, and the handle cover plate 8 is positioned on the fixture 7 perpendicular to the spraying direction of the overspray mist 3. The overspray mist 3 generated by the spray cup 1 is used to spray the handle cover plate 8 mounted on the fixture 7 on-vehicle, solving the problem of dripping at the lower edge of the handle cover plate 8 after separate on-vehicle painting.

[0100] Then, based on the door panel spraying trajectory and the angle α between the main paint mist 2 and the overspray paint mist 3, the highest boundary line of the overspray paint mist 3 sprayed on the handle cover plate 8 is obtained. The handle cover plate 8 is then divided into spraying zones according to this highest boundary line. The lower spraying area of ​​the handle cover plate 8 is sprayed using the overspray paint mist along the same trajectory as the rear door of the vehicle. When the spraying cup 1 is spraying the upper part of the rear door, the overspray paint mist 3 generated by the spraying cup 1 is used to achieve the spraying of the lower spraying area of ​​the handle cover plate 8. The upper spraying area of ​​the handle cover plate 8 is sprayed separately using a separate spraying trajectory, reducing the number of spraying trajectories by 1-3 on each side of the vehicle body, thus simplifying the spraying trajectory of the handle cover plate 8. The lower spraying area of ​​the handle cover plate 8 does not need a separate spraying trajectory, saving corresponding spraying flow and cycle time, and improving the work efficiency of vehicle body spraying.

[0101] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0102] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 said element.

[0103] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for spray-painting handle covers on streamlined vehicle bodies, characterized in that, include: Obtain the angle α between the main spray paint mist (2) and the overspray paint mist (3) sprayed by the spray cup (1), and the spray width diameter of the main spray paint mist (2); The spray pattern of the spray cup (1) is planned according to the spray diameter to vertically spray the door panel of the rear door (6) of the vehicle body. The door panel spray pattern covers at least the upper edge of the rear door (6). Based on the door panel spraying trajectory and the angle α between the main spray paint mist (2) and the overspray paint mist (3), the highest boundary line of the overspray paint mist (3) sprayed on the handle cover plate (8) is obtained; The handle cover (8) is divided into spraying zones according to the highest boundary line, wherein the spraying zones include an upper spraying area and a lower spraying area. The cover plate spraying trajectory is planned to spray the upper spraying area separately, and the door panel spraying trajectory is used to spray the lower spraying area and the rear door of the vehicle body (6) simultaneously; Wherein: obtaining the angle α between the main paint mist (2) and the overspray mist (3) sprayed from the spraying rotary cup (1) specifically includes: The spraying cup (1) is suspended inside the spherical container (4), with the spraying cup (1) positioned at the center of the spherical container (4). The spray cup (1) atomizes the paint at a set flow rate and rotation speed, forming a main spray paint mist surface and an overspray paint mist surface in a spherical container (4); Connect the center point of the annular area of ​​the main spray paint mist surface to the center of the sphere to form the first line, and connect the center point of the cross section passing through the spray paint mist surface to the center of the sphere to form the second line. The angle between the first line and the second line is the angle α between the main spray paint mist (2) and the overspray paint mist (3); Obtain the spray pattern diameter of the main paint mist (2), specifically including: Lay out a piece of paper (5) of a set size, and place the spray cup (1) above the paper (5) and perpendicular to the paper (5); After adjusting the distance between the spray cup (1) and the paper (5), the spray cup (1) atomizes the paint and sprays it onto the paper (5) at the set flow rate and speed. The main spray paint mist sprayed on the paper (5) has a circular structure. The outer diameter of the main spray paint mist spray surface is measured by measuring with a ruler, which is the spray width diameter of the main spray paint mist (2). Based on the spray pattern diameter, the spray cup (1) is used to vertically spray the door panel of the rear door (6) of the vehicle body, specifically including: A rectangular structure is established with the spraying area of ​​the spraying cup (1) from the rear door (6) of the vehicle body as the length and the spray width of the main spray mist (2) as the width; The top vertex of one side of the bottom of the rectangular structure coincides with the upper edge of the rear door (6) of the vehicle body, so that the main paint mist (2) covers the upper edge of the rear door (6) of the vehicle body to form the door panel spraying trajectory; The center line of the rectangular structure is perpendicular to the painting area of ​​the rear door (6) of the vehicle body, and the angle b between the center line of the rectangular structure and the Z axis of the vehicle body is measured. The angle c between the spraying direction of the overspray (3) and the Z-axis of the vehicle body is calculated based on the included angle b and included angle a, where c = 180° - ab; Before obtaining the highest boundary line of the paint mist (3) sprayed on the handle cover plate (8), the following is also included: A fixture (7) is installed above the rear door (6) of the vehicle body to make the handle cover (8) perpendicular to the paint spray mist (3); The angle between the plane of the fixture (7) and the Z-axis of the vehicle body is d, where d = 90° - c; Fix the fixture (7) above the rear door (6) of the vehicle body using clamping springs and pins according to the angle d between the fixture (7) and the Z-axis; Fix the handle cover plate (8) onto the fixture (7) and wait for the spraying rotary cup (1) to spray it.

2. The method for spraying a handle cover plate of a streamlined vehicle body with the vehicle as described in claim 1, characterized in that: The handle cover (8) includes a door handle cover (9), a fuel filler cover (10) and a charging port cover. There are four door handle covers (9), and one fuel filler cover (10) and one charging port cover. Install two of the door handle covers (9) on the fixture (7) above one of the rear doors (6) of the vehicle body, and install the other two door handle covers (9) on the fixture (7) above the other rear door (6); The fuel filler cap (10) is mounted on a fixture (7) above one of the vehicle's rear doors (6), and the charging port cap is mounted on a fixture (7) above the other vehicle's rear door (6).

3. The method for spraying a handle cover plate of a streamlined vehicle body with the vehicle as described in claim 2, characterized in that: The two door handle covers (9) are respectively arranged on both sides of the fuel filler cover (10) or the charging port cover, and the distance between the door handle cover (9) and the fuel filler cover (10) or the charging port cover is greater than 17cm.

4. The method for spraying a handle cover plate of a streamlined vehicle body with the vehicle as described in claim 1, characterized in that: When dividing the handle cover (8) into spraying zones according to the highest boundary line, it is also necessary to determine the paint condition of the handle cover (8) when spraying the rear door (6) of the vehicle body; If the paint finish of the handle cover (8) reaches the spraying quality, then the handle cover (8) is divided into upper and lower sections according to the lower spraying area. If the paint finish on the handle cover (8) does not meet the spraying quality, the lower spraying area should be reduced before dividing the handle cover (8) into upper and lower sections.

5. The method for spraying a handle cover plate of a streamlined vehicle body with the vehicle as described in claim 1, characterized in that: The sprayed area on the upper edge of the rear door (6) of the vehicle body is a streamlined shape with the arc surface facing upward.

6. The method for spraying a handle cover plate of a streamlined vehicle body with the vehicle as described in claim 1, characterized in that: The distance between the spraying rotary cup (1) and the spraying area of ​​the rear door (6) of the vehicle body is 15-20cm.

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