High-appearance vehicle body color register method and vehicle

Abstract

The invention discloses a color register method for a high-appearance vehicle body and a vehicle, and the method comprises the following steps: spraying intermediate paint on the vehicle body after electrophoretic coating, drying, and polishing the whole vehicle; after the first-time colored paint varnish is sprayed and dried, the inner surface area and the outer surface area are subjected to color separation shielding after the automobile body is polished; removing the color separation shielding after spraying and drying the colored paint varnish for the second time, and polishing to eliminate the ridge of the waist line color separation line, the surface of the exposed area of the outer surface of the automobile body and the exposed area of the inner surface of the automobile body; after third-time varnish spraying and drying on the inner surface, the outer surface and the outer surface of the automobile body are completed, the paint film surface of the automobile body waistline is ground and flattened, after whole-automobile grinding and polishing treatment is conducted, whole-automobile assembly shielding is conducted, and penetrating gold thread pattern spraying at the color separation line position is completed; the method is suitable for various traditional coating processes and floating-coating-free processes at present, the spraying requirement for simultaneously producing different types of color-register vehicle types in a workshop can be met, the quality effect of the overall coating of the color-register vehicle body is effectively improved, meanwhile, quality defects and re-investment transformation of a coating production line are reduced, and the method is worthy of popularization and reference.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle spraying, and in particular to a high-appearance vehicle body color matching method and a vehicle. Background Art

[0002] With the continuous development of modern society, people's demands for automobile products have become more diversified. Among them, the two-color and multi-color personalized painting of the car body has become an important means to enhance the charm of the whole vehicle and increase efficiency internationally.

[0003] However, the appearance quality of the color separation line of a two-color body is difficult to control, especially when the color separation line is in a highly visible area on the outer surface of the body. These defects have a great negative impact on the overall appearance of the body painting. The problem that the existing technology of achieving visible position color separation still exists is that the orange peel texture on the body surface will be magnified after the varnish is sprayed, resulting in a worse orange peel appearance, especially for dark colors, which is easy to cause complaints from users; in addition, in the process of designing new car models, the body color design schemes are becoming more and more complex and diverse. Some styling schemes add a third color to cover the color separation line at the position of the body color separation line. After spraying, there will still be slight ridge protrusions at the position of the color separation line. After the third color is sprayed, the ridge protrusions cannot be completely covered, resulting in visual defects. The above problems need to be solved urgently. Summary of the invention

[0004] The object of the present invention is to provide a method for coloring a vehicle body with high appearance and a vehicle, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for color matching of a high-appearance vehicle body, comprising:

[0006] After electrophoretic coating, the car body is sprayed with mid-coat paint and dried. After the mid-coat is dried, the exposed area of ​​the car body outer surface is polished;

[0007] After the first coat of paint and clear varnish is sprayed, it is dried, and after the body is polished, the inner and outer surface areas of the body are color-separated and masked;

[0008] After the second coat of paint and clear varnish is sprayed, it is dried and the color separation mask is removed. The step state of the waistline color separation line edge position is eliminated by grinding, the orange peel texture on the exposed area of ​​the outer surface of the car body is removed, and the adhesion between the paint film coatings on the exposed area of ​​the inner surface of the car body is improved;

[0009] After the third coat of clear varnish is sprayed on the inner and outer surfaces of the vehicle body, it is dried, and the paint film surface of the waistline of the vehicle body is smoothed by grinding and polishing. The inner and outer surfaces of the color paint area on the inner and outer surfaces of the vehicle body are not sprayed;

[0010] After the entire vehicle is polished, it is assembled and masked, and the gold line pattern is sprayed at the color separation line position.

[0011] Furthermore, after the electrophoretic coating, the vehicle body is sprayed with intermediate coating and dried, and after the intermediate coating is dried, the exposed area of ​​the outer surface of the vehicle body is polished, which also includes:

[0012] The first standard Ra value is set according to the process requirements so that the roughness of the paint film surface after grinding is above the standard Ra value.

[0013] Further, removing the orange peel texture on the exposed area of ​​the vehicle body outer surface also includes:

[0014] The second standard Ra value is set according to the process requirements so that the roughness of the paint film surface after polishing is above the second standard Ra value, and the orange peel texture on the exposed area of ​​the outer surface of the vehicle body is removed to make the outer surface of the entire vehicle appear matte.

[0015] Furthermore, after the whole vehicle is polished, the whole vehicle is assembled and masked, and the through-gold line pattern is sprayed at the color separation line position, which also includes:

[0016] During the vehicle assembly process, other separately sprayed two-color exterior parts are assembled to the body, and the gap step size is adjusted according to the process requirements. After the complete vehicle assembly state is formed, the whole vehicle is masked and the through-gold line pattern spraying is completed at the color separation line position.

[0017] Further, including:

[0018] The whole vehicle is masked using conformable color separation tape;

[0019] Stick the color separation tape along both sides of the color separation line and leave the spraying area exposed;

[0020] Apply the masking film on the color separation tape and fix it with high-temperature paper tape;

[0021] Use high temperature paper tape to mask off gaps that may be contaminated during the spraying process.

[0022] Further, including:

[0023] Mix the paint according to the proportion required by the process and spray the exposed areas after masking;

[0024] Set the standard flash-drying time according to the process requirements. After the first spraying, carry out the second spraying after the standard flash-drying time. After the second spraying, let it dry.

[0025] Furthermore, after the second spraying is completed and dried, it also includes:

[0026] Set the low-temperature standard drying temperature and standard drying time according to the process requirements;

[0027] After controlling the drying temperature to the standard drying temperature, maintain the standard drying time to complete the drying of the car body.

[0028] Further, after controlling the drying temperature to the standard drying temperature, maintaining the standard drying time to complete the drying of the vehicle body, further comprising:

[0029] After the car body is dried within the standard drying time, the car body returns to room temperature and the covering is removed.

[0030] Further, including:

[0031] Set the room temperature drying time according to the process requirements, and complete the drying after the room temperature drying time.

[0032] On the other hand, a vehicle is provided, which is subjected to high-appearance vehicle body color matching by applying any of the high-appearance vehicle body color matching methods described above.

[0033] Compared with the prior art, the invention has the following beneficial effects: solving the problem of poor orange peel appearance after the third coat of clear varnish is sprayed and the problem of raised edges after other coatings are applied on the color separation line, realizing the modeling scheme while improving the visual quality of the vehicle appearance and meeting the needs of high-end users;

[0034] The present invention is applicable to various current traditional painting processes and mid-coat-free processes, and can meet the spraying needs of workshops producing different types of color-matching vehicles at the same time. While effectively improving the overall coating quality of color-matching vehicles, it reduces quality defects and reinvestment in painting production lines, and is worthy of promotion and reference. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The present invention is a flowchart of a method for color matching a high-appearance vehicle body according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Please refer to the attached drawings of the specification, the present invention provides a technical solution: a method for color matching of a high-appearance vehicle body, comprising the following steps:

[0040] S102, after electrophoretic coating, the car body is sprayed with intermediate coating and dried. After the intermediate coating is dried, the exposed area of ​​the outer surface of the car body is polished;

[0041] Specifically, the first standard Ra value is set according to the process requirements so that the roughness of the paint film surface after grinding is above the standard Ra value.

[0042] After the mid-coat is dried, the exposed area of ​​the outer surface of the vehicle body is polished. Two specifications of sandpaper, P800# and P1000#, are used. Through a combination of a grinder and manual polishing, preferably, the roughness of the paint film surface after polishing is controlled to be above the first standard Ra value of 0.3um. The Ra value is a parameter of surface roughness, which represents the average value of the absolute value of the height difference of each point relative to the average surface of the surface. It is generally used to evaluate the surface roughness and is measured in microns. The thickness of the mid-coat removed by polishing is about 3-5um, and the orange peel texture on the surface of the vehicle body is removed, making the outer surface of the whole vehicle matte.

[0043] S104, drying after the first coat of color paint and clear varnish spraying is completed, and the vehicle body is polished and the inner and outer surface areas of the vehicle body are color-separated and masked;

[0044] S106, drying after the second coat of color paint and clear varnish is completed, removing the color separation mask, eliminating the step state of the waistline color separation line edge position by grinding, removing the orange peel texture on the exposed area of ​​the outer surface of the vehicle body, and improving the adhesion between the paint film coatings on the exposed area of ​​the inner surface of the vehicle body;

[0045] Among them, in order to solve the problem of uneven ridges of the color separation line, the second coat of color paint and varnish is dried after spraying, and after removing the color separation mask, the exposed waistline position color separation line is finely polished;

[0046] Specifically, the second standard Ra value is set according to the process requirements so that the roughness of the paint film surface after polishing is above the second standard Ra value, and the orange peel texture on the exposed area of ​​the outer surface of the vehicle body is removed, so that the outer surface of the entire vehicle presents a matte state.

[0047] Among them, after the second coat of paint and clear varnish spraying and drying of the car body is completed and the masking is removed, the color separation line edge line at the waistline position is finely polished. During the polishing process, P2500# sandpaper is used to try to eliminate the step-like state of the color separation line position, and then it is wiped clean with a fiber towel;

[0048] The exposed areas of the vehicle body are polished. Sandpaper of three specifications, P1000#, P1200# and P1500#, is used to polish the varnish layer on the vehicle body surface by a combination of a grinder and manual polishing. The relatively flat large surface of the vehicle body can be polished by a grinder, and the irregular surface areas such as corners, edges, and depressions are polished manually. The roughness of the paint film surface after polishing is controlled to be above the second standard Ra value of 0.15um. The thickness of the varnish film removed by polishing is about 5-7um. The orange peel texture on the vehicle body surface is removed, making the outer surface of the vehicle matte.

[0049] Use P1200# sandpaper to simply polish the exposed areas on the inner surface of the car body, such as the four doors, entrances, water troughs, etc., to improve the adhesion between the paint film coatings;

[0050] Wipe the surface of the car body clean, use a microfiber cloth to wipe the inner and outer surfaces of the car body repeatedly to remove the grinding dust produced by the aforementioned grinding, use a dust blower to blow away the residual grinding dust in the gaps between the inner and outer surfaces of the car body, and wipe and blow repeatedly until the inner and outer surfaces of the car body are clean and free of pollution.

[0051] Preferably, before entering the spray booth, the inside and outside of the vehicle body are cleaned again manually using a sticky cloth and a dust blower, and the outside of the vehicle body is cleaned using an ostrich feather or sword brush robot to ensure the cleanliness of the vehicle body.

[0052] S108, after the third coat of clear varnish is sprayed on the inner and outer surfaces of the vehicle body, the vehicle body is dried, the paint film surface of the waistline of the vehicle body is smoothed by grinding, and polished, wherein the inner and outer surfaces of the color paint area on the inner and outer surfaces of the vehicle body are not sprayed;

[0053] Among them, the third coat of color paint and clear varnish is sprayed on the inner and outer surfaces separately (the inner and outer surfaces of the color paint are not sprayed) and dried, the waistline of the vehicle body is polished for the second time, and 2500# sandpaper is used to polish the slight ridges at the waistline of the vehicle body after the varnish is leveled until the surface of the paint film is flat, and a pneumatic polisher is used with a wool ball to polish the polished paint surface. After polishing, the paint surface has no polishing marks and polishing shadows; add a third coat of varnish spraying, and the paint naturally flows on the color separation line step to make the original more prominent ridge surface become smoother. After the third coat of varnish is dried, the relatively gentle surface of the color separation line position is finely polished and polished, so that the surface of the paint film is completely flat without any touch. At the same time, the third coat of varnish spraying makes a sufficiently thick varnish layer on the color separation line, so that there is enough space for polishing during the processing, and there will be no performance problems such as bottom exposure due to excessive polishing, or adhesion attenuation due to insufficient varnish thickness.

[0054] S110, after the whole vehicle is polished, the whole vehicle is assembled and masked, and the penetrating gold line pattern is sprayed at the color separation line position.

[0055] Among them, the spraying of other color patterns above the color separation line at the grinding and polishing finishing of the whole vehicle can be carried out after the body is painted or the whole vehicle is assembled.

[0056] Specifically, during the vehicle assembly process, other separately sprayed two-color exterior parts are assembled onto the vehicle body, and the gap step size is adjusted according to the process requirements. After the complete vehicle assembly state is formed, the vehicle is masked and the through-gold line pattern spraying is completed at the color separation line position.

[0057] Among them, in this embodiment, the car body needs to be wiped clean first to avoid residual dust that affects the smoothness of the paint surface during the subsequent painting process.

[0058] Specifically, a conformable color separation tape is used in the process of masking the entire vehicle; the color separation tape is pasted along both sides of the color separation line, and the spraying area is left exposed; a masking film is then pasted on the color separation tape, and it is closed and fixed with high-temperature paper tape; and high-temperature paper tape is used to mask gaps that may be contaminated during the spraying process.

[0059] Specifically, the color paint is mixed according to the proportion required by the process, and the exposed area after masking is sprayed;

[0060] Set the standard flash-drying time according to the process requirements. After the first spraying, carry out the second spraying after the standard flash-drying time. After the second spraying, let it dry.

[0061] Among them, in this embodiment, preferably, an air spray gun is used to spray the exposed area after masking with a color paint prepared in a certain proportion. After the first coat is completed, the second coat is sprayed after flash drying for 10 minutes, and the paint is dried after spraying.

[0062] Specifically, after the second spraying is completed and dried, it also includes:

[0063] Set the low-temperature standard drying temperature and standard drying time according to the process requirements;

[0064] After controlling the drying temperature to the standard drying temperature, maintain the standard drying time to complete the drying of the car body.

[0065] Among them, in this embodiment, preferably, a low-temperature heating device is used, and a standard drying temperature of 50°C is set to dry the car body. After reaching the set temperature, the car body is kept warm for 90-120 minutes through the standard drying time, and the heating device is turned off after the insulation ends.

[0066] Specifically, after controlling the drying temperature to the standard drying temperature, maintaining the standard drying time to complete the drying of the vehicle body, further comprising:

[0067] After the car body is dried within the standard drying time, the car body returns to room temperature and the covering is removed.

[0068] Specifically, the room temperature drying time is set according to the process requirements, and the drying is completed after the room temperature drying time has elapsed.

[0069] Among them, preferably, the room temperature drying time is set to 48 hours according to the process requirements, and touching the waistline is not allowed before the drying time is reached.

[0070] The present invention is applicable to various current traditional painting processes and mid-coat-free processes, and can meet the spraying needs of workshops producing different types of color-matching vehicles at the same time. While effectively improving the overall coating quality of color-matching vehicles, it reduces quality defects and reinvestment in painting production lines, and is worthy of promotion and reference.

[0071] On the other hand, a vehicle is provided, which is subjected to high-appearance vehicle body color matching by applying any of the high-appearance vehicle body color matching methods described above.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for color matching of a vehicle body with high appearance, characterized in that: include: After electrophoretic coating, the car body is sprayed with mid-coat paint and dried. After the mid-coat is dried, the exposed area of ​​the car body outer surface is polished; After the first coat of paint and clear varnish is sprayed, it is dried, and after the body is polished, the inner and outer surface areas of the body are color-separated and masked; After the second coat of paint and clear varnish is sprayed, it is dried and the color separation mask is removed. The step state of the waistline color separation line edge position is eliminated by grinding, the orange peel texture on the exposed area of ​​the outer surface of the car body is removed, and the adhesion between the paint film coatings on the exposed area of ​​the inner surface of the car body is improved; After the third coat of clear varnish is sprayed on the inner and outer surfaces of the vehicle body, it is dried, and the paint film surface of the waistline of the vehicle body is smoothed by grinding and polishing. The inner and outer surfaces of the color paint area on the inner and outer surfaces of the vehicle body are not sprayed; After the entire vehicle is polished, it is assembled and masked, and the gold line pattern is sprayed at the color separation line position.

2. A method for color matching of a high-appearance vehicle body according to claim 1, characterized in that: After electrophoretic coating, the car body is sprayed with mid-coat paint and dried. After the mid-coat is dried, the exposed area of ​​the car body surface is polished, which also includes: The first standard Ra value is set according to the process requirements so that the roughness of the paint film surface after grinding is above the standard Ra value.

3. A method for color matching of a high-appearance vehicle body according to claim 1, characterized in that: Removal of orange peel texture on the exposed areas of the vehicle body exterior, including: The second standard Ra value is set according to the process requirements so that the roughness of the paint film surface after polishing is above the second standard Ra value, and the orange peel texture on the exposed area of ​​the outer surface of the vehicle body is removed to make the outer surface of the entire vehicle appear matte.

4. A method for color matching of a high-appearance vehicle body according to claim 1, characterized in that: After the whole vehicle is polished, the whole vehicle is assembled and masked, and the gold line pattern through the color separation line is sprayed, which also includes: During the vehicle assembly process, other separately sprayed two-color exterior parts are assembled to the body, and the gap step size is adjusted according to the process requirements. After the complete vehicle assembly state is formed, the whole vehicle is masked and the through-gold line pattern spraying is completed at the color separation line position.

5. A method for color matching of a high-appearance vehicle body according to claim 4, characterized in that: include: The whole vehicle is masked using conformable color separation tape; Stick the color separation tape along both sides of the color separation line and leave the spraying area exposed; Apply the masking film on the color separation tape and fix it with high-temperature paper tape; Use high temperature paper tape to mask off gaps that may be contaminated during the spraying process.

6. A method for color matching of a high-appearance vehicle body according to claim 5, characterized in that: include: Mix the paint according to the proportion required by the process and spray the exposed areas after masking; Set the standard flash-drying time according to the process requirements. After the first spraying, carry out the second spraying after the standard flash-drying time. After the second spraying, let it dry.

7. A method for color matching of a high-appearance vehicle body according to claim 6, characterized in that: After the second spraying is completed and dried, it also includes: Set the low-temperature standard drying temperature and standard drying time according to the process requirements; After controlling the drying temperature to the standard drying temperature, maintain the standard drying time to complete the drying of the car body.

8. A method for color matching of a high-appearance vehicle body according to claim 7, characterized in that: After controlling the drying temperature to the standard drying temperature, maintaining the standard drying time to complete the drying of the car body, it also includes: After the car body is dried within the standard drying time, the car body returns to room temperature and the covering is removed.

9. A method for color matching of a high-appearance vehicle body according to claim 8, characterized in that: include: Set the room temperature drying time according to the process requirements, and complete the drying after the room temperature drying time.

10. A vehicle, characterized in that: A high-appearance vehicle body color matching method as described in any one of claims 1 to 9 is used to perform high-appearance vehicle body color matching.

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