Hub UV paste positioning pasting device and coating process

Abstract

The invention relates to a hub UV paste positioning pasting device and a coating process. The device comprises a base; the supporting column is rotationally connected to the base around the axis of the supporting column; the driving device drives the supporting column to rotate around the axis of the supporting column; the bracket is arranged at the upper part of the supporting column and is supported on the flange; the conical surface positioning core is elastically connected to the top of the supporting column in a sliding mode in the axial direction and is limited in the radial direction through the bracket, and a conical surface is arranged in the annular direction of the conical surface positioning core; part of the conical surface positioning core can extend into the hub center hole, and the conical surface is in contact with the junction of the inner wall and the bottom surface of the hub center hole. The coating process comprises the steps that after hub colored paint is sprayed and baked to be qualified, the hub is transferred to the positioning and pasting device, adhesive sticker glaze paper on the back face of the UV sticker is removed and pasted to a designated position, an electrostatic protection film on the surface of the UV sticker is removed, a transparent coating is sprayed, and the transparent coating is baked. According to the invention, the inconsistency of manual wheel hub painting operation can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wheel hub processing, and in particular to a wheel hub UV sticker positioning and pasting device and a coating process. Background Art

[0002] At present, in order to meet the needs of personalization and aesthetics, there is a trend in the market for aluminum alloy wheels to achieve the desired effect through precision milling of the aluminum material itself. Usually, aluminum alloy wheels are processed by fine turning or precision milling after the painting and spraying. When the characters on the wheel are required to be in different colors, the traditional method is usually to achieve it by turning and milling first and then hand painting, or pre-casting first and then hand painting.

[0003] The wheel hub is often affected by external conditions during the spraying process. During the spraying and curing process, some defects such as particles, fiber hair, paint spots, etc. that affect the appearance will be produced, and secondary repair is required. Then the number of coating layers and thickness will increase. When milling and turning, paint cracking and other phenomena will occur, resulting in the inability to continue production of the product. If the paint does not crack after milling and turning, manual painting is still required when different colors are required. Manual painting is not only time-consuming and labor-intensive, but it is also difficult to ensure consistency in the painting process, and it is easy to produce defects such as paint accumulation, hanging edges or jagged edges, which in turn affects the overall aesthetics of the product. In addition, it is very difficult to maintain consistency during mass production, so there is an urgent need for a solution that can solve the above problems. Summary of the invention

[0004] To this end, the present invention provides a wheel hub UV sticker positioning and pasting device and a coating process, which can reduce the inconsistency of the milling and turning process and the manual painting of the wheel hub operation, is suitable for mass production, and improves the decoration efficiency and aesthetics of the wheel hub surface.

[0005] In order to solve the above technical problems, the present invention provides a wheel hub UV sticker positioning and pasting device, the wheel hub comprises a flange, a plurality of bolt holes are distributed circumferentially along the central axis of the flange of the wheel hub, and a wheel hub center hole is provided at the center of the plurality of bolt holes; the positioning and pasting device comprises: Pedestal; A support column, rotatably connected to the base around its own axis; A driving device, driving the support column to rotate around its own axis; A bracket, disposed on the upper portion of the support column and supported on the flange; A conical surface positioning core is elastically slidably connected to the top of the support column along the axial direction and is radially limited by the bracket, wherein the conical surface positioning core is circumferentially provided with a conical surface, and part of the conical surface positioning core can extend into the center hole of the hub and make the conical surface contact with the junction between the inner wall and the bottom surface of the center hole of the hub.

[0006] In one embodiment of the present invention, a center positioning core extends axially outward along the top of the support column, the diameter of the center positioning core is smaller than the diameter of the support column, and the center positioning core sleeve is provided with a spring, which is used to provide a force for the conical positioning core to move away from the support column.

[0007] In one embodiment of the present invention, a central step hole is provided along the center of the conical surface positioning core, the central step hole is sleeved outside the central positioning core, and the step surface of the central step hole abuts against the spring.

[0008] In one embodiment of the present invention, the ring shape of the conical positioning core is also provided with a sliding portion connected with the conical surface, and a receiving cavity is provided at the center of the bracket. The conical positioning core is accommodated in the receiving cavity and the sliding portion slides on the side wall of the receiving cavity.

[0009] In one embodiment of the present invention, a detachable annular guard plate is provided on the annular top of the bracket, the annular guard plate is in contact with the bottom surface of the flange, and the hardness of the annular guard plate is 50-65HB.

[0010] In one embodiment of the present invention, the annular guard plate is detachably connected to the bracket by screws.

[0011] In one embodiment of the present invention, a mounting seat is provided on the top of the base, a bearing is provided in the mounting seat, the bottom of the support column is installed in the base through the bearing, and a dustproof guard covering the top of the bearing is installed on the base.

[0012] In one embodiment of the present invention, the driving device includes a synchronous belt device, and a synchronous belt groove is provided on the surface of the support column corresponding to the synchronous belt device.

[0013] The present invention also provides a wheel hub coating process, using the wheel hub UV sticker positioning and pasting device, the coating process includes: S1. After the wheel hub is sprayed with paint and baked, it is positioned by the wheel hub UV sticker positioning and pasting device; S2. Use an infrared scanning device to scan the position of the valve hole of the wheel hub, and control the rotation of the support column according to the scanning result to adjust the wheel hub to the predetermined pasting position; S3. Clean the wheel surface to ensure that there is no dust, oil or other impurities in the UV sticker pasting area; S4, providing a soft plastic film, wherein the soft plastic film is conformed to a predetermined area of ​​the hub surface and has an opening for exposing the surface of the predetermined area, wherein the predetermined area includes the spoke surface and the junction area between the spoke surface and the flange surface, and the soft plastic film is adhered to the predetermined area; S5. Provide a UV sticker, wherein the UV sticker includes a UV layer of different colors and an electrostatic protective film and a self-adhesive glazed paper arranged on the front and back sides of the UV layer; S6. Remove the self-adhesive glazed paper on the back of the UV sticker to expose the sticky surface, and gently press the sticky surface of the UV sticker to the surface of the hub at the opening position, and press the UV sticker to ensure that it is evenly adhered to the surface of the hub; S7. After the pasting is completed, remove the electrostatic protective film on the surface of the UV sticker and ensure that the surface of the UV sticker is clean and has no scratches; S8, spraying a transparent coating on the surface of the wheel hub, and baking the transparent coating after the spraying of the transparent coating is completed; S9. After the clear coating is baked, take out the wheel and let it cool.

[0014] In one embodiment of the present invention, the spray thickness of the transparent coating is not less than 10 microns, the baking temperature of the transparent coating is controlled between 140-230°C, and after baking, the hardness is not less than 1H; the surface of the UV sticker is higher than the color paint surface of the wheel hub and is located inside the transparent coating to give a three-dimensional effect to the eye.

[0015] The above technical solution of the present invention has the following advantages compared with the prior art: The present invention discloses a wheel hub UV sticker positioning and pasting device and a coating process. The use of UV sticker in conjunction with the positioning and pasting device avoids the inconsistency problem of manual operation, making the positioning of the wheel hub UV sticker more accurate, thereby ensuring the decorative beauty and consistency of the wheel hub surface. The coating process combined with the UV sticker can effectively reduce the errors caused by human factors and improve the overall quality of the coating.

[0016] The present invention can accurately paste on the complex surface area of ​​the hub with the help of soft plastic film, avoiding the paste deviation caused by the complex shape of the hub surface. The opening design of the film exposes the area to be pasted, ensuring that the UV sticker is closely attached to the predetermined position, and improving the consistency of pasting.

[0017] After the UV sticker is applied, the wheel hub is sprayed with a transparent coating and baked to form a high-hardness protective film. The transparent coating has good performance in terms of wear resistance, corrosion resistance and high temperature resistance, further protects the long-term stability of the UV layer pattern, and improves the glossiness of the wheel hub surface and makes the texture better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0019] Figure 1It is a structural schematic diagram of the wheel hub UV sticker positioning and pasting device of the present invention.

[0020] Figure 2 It is a schematic diagram of pasting a soft plastic film on a wheel hub according to the present invention.

[0021] Figure 3 It is a schematic diagram of sticking a UV sticker on a wheel hub according to the present invention.

[0022] Description of the Figures in the Specification: 100, wheel hub; 110, flange; 120, bolt hole; 130, center hole of wheel hub; 140, spoke; 150, valve hole; 1. Base; 11. Mounting seat; 12. Bearing; 13. Dust protection; 2. Support column; 21. Synchronous belt groove; 3. bracket; 31. accommodating cavity; 4. Conical positioning core; 41. Center step hole; 42. Sliding part; 5. Center positioning core; 6. Spring; 7. Annular guard plate; 8. Screws; 9. Soft plastic film; 91. Opening. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0024] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0025] In the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present invention, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0027] Reference Figure 1 , Figure 2 As shown, this embodiment provides a wheel hub 100 UV sticker positioning and pasting device, the wheel hub 100 includes a flange 110, a plurality of bolt holes 120 are distributed circumferentially along the central axis of the flange 110 of the wheel hub 100, and a wheel hub center hole 130 is provided at the center of the plurality of bolt holes 120; the positioning and pasting device includes: Base 1; The support column 2 is rotatably connected to the base 1 around its own axis; A driving device, driving the support column 2 to rotate around its own axis; The bracket 3 is arranged on the upper part of the support column 2 and supported by the flange 110; The conical surface positioning core 4 is elastically slidably connected to the top of the support column 2 along the axial direction and is radially limited by the bracket 3, wherein the conical surface positioning core 4 is circumferentially provided with a conical surface, and part of the conical surface positioning core 4 can extend into the hub center hole 130 and make the conical surface contact with the junction between the inner wall and the bottom surface of the hub center hole 130.

[0028] Specifically, a center positioning core 5 extends axially outward along the top of the support column 2 , the diameter of the center positioning core 5 is smaller than the diameter of the support column 2 , and the center positioning core 5 is sleeved with a spring 6 , which is used to provide a force for the conical positioning core 4 to move away from the support column 2 .

[0029] Specifically, a central step hole 41 is provided along the center of the conical surface positioning core 4 , and the central step hole 41 is sleeved outside the central positioning core 5 , and a step surface of the central step hole 41 abuts against the spring 6 .

[0030] The conical positioning core 4 is provided with elastic force away from the support column 2 through the spring 6, ensuring that the appropriate pressure contact is always maintained when the wheel hub 100 is installed, thereby improving the positioning reliability. The setting of the center positioning core 5 realizes accurate axial positioning, and the spring 6 force maintains stable support to prevent deviation due to vibration or other external forces; the design of the center step hole 41 makes the conical positioning core 4 more stable and not easy to slip.

[0031] Specifically, the ring shape of the conical positioning core 4 is also provided with a sliding portion 42 connected with the conical surface, and a receiving cavity 31 is provided at the center of the bracket 3. The conical positioning core 4 is accommodated in the receiving cavity 31 and the sliding portion 42 slides on the side wall of the receiving cavity 31.

[0032] Specifically, a removable annular guard plate 7 is provided on the annular top of the bracket 3, and the annular guard plate 7 contacts the bottom surface of the flange 110. The annular guard plate 7 is made of a material with a hardness of 50-65HB, and can be fixedly connected to the bracket 3 by a flat machine screw 8, and is used to contact the bottom surface of the flange 110 of the hub 100 during operation, while avoiding damage to the surface of the hub 100. The guard plate can be removed during cleaning and maintenance, so as to facilitate replacement or maintenance.

[0033] Specifically, a mounting seat 11 is provided on the top of the base 1, a bearing 12 is provided in the mounting seat 11, the bottom of the support column 2 is installed in the base 1 through the bearing 12, and a dustproof guard 13 covering the top of the bearing 12 is installed on the base 1. Prevent dust from entering the bearing 12, effectively extending the life of the device.

[0034] Specifically, the driving device includes a synchronous belt device, and a synchronous belt groove 21 is provided on the surface of the support column 2 corresponding to the synchronous belt device.

[0035] This embodiment also provides a coating process for the wheel hub 100, using the UV sticker positioning and pasting device for the wheel hub 100, the coating process includes: S1. After the wheel hub 100 has completed the paint spraying and baking treatment, and after the paint spraying and baking are qualified, it is transferred to the wheel hub 100 UV sticker positioning and pasting device, and is positioned by the wheel hub 100 UV sticker positioning and pasting device; S2. Use infrared scanning equipment to scan the position of the valve hole 150 of the wheel hub 100, and control the rotation of the support column 2 according to the scanning result to adjust the wheel hub 100 to the predetermined pasting position. The scanning resolution is within 0.1mm to ensure the accuracy of position adjustment. Infrared scanning avoids manual alignment errors, improves position consistency, and increases efficiency and production capacity.

[0036] S3. Clean the surface of the wheel hub 100 to ensure that there is no dust, oil or other impurities in the area where the UV sticker is pasted. For example, use a dust-free cloth and a solvent (such as isopropyl alcohol) to thoroughly clean the surface of the wheel hub 100 to ensure that there is no dust, oil or other impurities in the area where the UV sticker is pasted.

[0037] S4, providing a soft plastic film 9, the soft plastic film 9 conforming to a predetermined area on the surface of the hub 100 and having an opening 91 exposing the surface of the predetermined area, the predetermined area including the surface of the spoke 140 and the junction area between the surface of the spoke 140 and the surface of the flange 110, and pasting the soft plastic film 9 to the predetermined area. Figure 2 , Figure 3 shown.

[0038] The soft plastic film 9 can effectively reduce the deviation of the pasting position and improve the consistency of the pasting operation, especially ensuring accurate pasting in the complex curved surface area of ​​the wheel hub 100.

[0039] S5. Provide a UV sticker, wherein the UV sticker comprises UV layers of different colors and an electrostatic protective film and a self-adhesive glazed paper arranged on the front and back sides of the UV layer.

[0040] The UV layer can withstand multiple baking at 230°C to ensure that it remains unchanged after painting, and patterns or characters of different colors can be configured as required.

[0041] S6. Remove the self-adhesive glazed paper on the back of the UV sticker to expose the sticky surface, gently press the sticky surface of the UV sticker to the surface of the wheel hub 100 at the position of the opening 91, and press the UV sticker to ensure that it is evenly adhered to the surface of the wheel hub 100.

[0042] The pasting pressure is controlled at 1-2N / cm² to avoid damage to the adhesive film due to excessive pressure. Pressing ensures that the UV sticker is evenly attached to the surface of the wheel hub 100, improving the aesthetics and reducing the risk of falling off.

[0043] S7. After the pasting is completed, remove the electrostatic protective film on the surface of the UV sticker and ensure that the surface of the UV sticker is clean and has no scratches; S8, spraying a transparent coating on the surface of the wheel hub 100, and baking the transparent coating after the spraying of the transparent coating is completed; the spraying thickness of the transparent coating is not less than 10 microns, preferably between 10-15 microns; the baking temperature of the transparent coating is controlled between 140-230° C., and after baking, the hardness is not less than 1H. The wear resistance and oxidation resistance of the wheel hub 100 are significantly enhanced.

[0044] Among them, the paint and powder adhesion of UV sticker (layer) and clear coating is ≥ GT01 level.

[0045] It should be noted that the clear coating layer can be made of acrylic clear powder coating with high transparency, high gloss and high leveling.

[0046] By spraying the clear coating on the UV layer, it effectively resists external physical wear, ultraviolet radiation and chemical corrosion. After spraying, the clear coating increases the gloss and texture of the wheel hub 100 surface and makes the UV layer pattern more distinct. The protective layer formed by the clear coating after curing improves the adhesion strength between the UV layer and the clear coating, ensuring long-term stability.

[0047] S9. After the transparent coating is baked, the wheel hub 100 is taken out and cooled at room temperature.

[0048] Specifically, the surface of the UV sticker is higher than the color paint surface of the wheel hub 100 and is located inside the transparent coating layer to give a three-dimensional effect to the eyes.

[0049] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A wheel hub UV sticker positioning and pasting device, the wheel hub (100) comprising a flange (110), a plurality of bolt holes (120) distributed circumferentially along the central axis of the flange (110) of the wheel hub (100), and a wheel hub center hole (130) being provided at the center of the plurality of bolt holes (120); characterized in that: The positioning and pasting device comprises: Base (1); A support column (2) is rotatably connected to the base (1) about its own axis; A driving device, driving the support column (2) to rotate around its own axis; A bracket (3) disposed on the upper portion of the support column (2) and supported on the flange (110); A conical surface positioning core (4), the conical surface positioning core (4) is elastically slidably connected to the top of the support column (2) in the axial direction and is radially limited by the bracket (3), wherein the conical surface positioning core (4) is provided with a conical surface in the circumferential direction, and a portion of the conical surface positioning core (4) can extend into the hub center hole (130) and make the conical surface contact with the junction between the inner wall and the bottom surface of the hub center hole (130).

2. The wheel hub UV sticker positioning and pasting device according to claim 1 is characterized in that: A center positioning core (5) extends axially outward from the top of the support column (2); the diameter of the center positioning core (5) is smaller than the diameter of the support column (2); a spring (6) is sleeved on the center positioning core (5); the spring (6) is used to provide a force to move the conical surface positioning core (4) away from the support column (2).

3. The wheel hub UV sticker positioning and pasting device according to claim 2 is characterized in that: A central step hole (41) is provided along the center of the conical surface positioning core (4); the central step hole (41) is sleeved outside the central positioning core (5); and a step surface of the central step hole (41) abuts against the spring (6).

4. The wheel hub UV sticker positioning and pasting device according to claim 1 is characterized in that: The ring shape of the conical surface positioning core (4) is also provided with a sliding portion (42) connected with the conical surface, and a receiving cavity (31) is provided at the center of the bracket (3), the conical surface positioning core (4) is accommodated in the receiving cavity (31), and the sliding portion (42) slides on the side wall of the receiving cavity (31).

5. The wheel hub UV sticker positioning and pasting device according to claim 4 is characterized in that: A detachable annular guard plate (7) is provided on the annular top of the bracket (3); the annular guard plate (7) is in contact with the bottom surface of the flange (110); and the hardness of the annular guard plate (7) is in the range of 50-65 HB.

6. The wheel hub UV sticker positioning and pasting device according to claim 5, characterized in that: The annular guard plate (7) is detachably connected to the bracket (3) via screws (8).

7. The wheel hub UV sticker positioning and pasting device according to claim 1 is characterized in that: A mounting seat (11) is arranged on the top of the base (1), a bearing (12) is arranged in the mounting seat (11), the bottom of the support column (2) is mounted in the base (1) via the bearing (12), and a dustproof protective device (13) covering the upper part of the bearing (12) is installed on the base (1).

8. The wheel hub UV sticker positioning and pasting device according to claim 1 is characterized in that: The driving device comprises a synchronous belt device, and a synchronous belt groove (21) is provided on the surface of the support column (2) corresponding to the synchronous belt device.

9. A wheel hub coating process, characterized in that: Using the wheel hub UV sticker positioning and pasting device according to any one of claims 1 to 9, the coating process includes: S1, after the wheel hub (100) has been subjected to the paint spraying and baking treatment, positioning is performed by using the wheel hub UV sticker positioning and pasting device; S2, using an infrared scanning device to scan the position of the valve hole (150) of the wheel hub (100), and controlling the rotation of the support column (2) according to the scanning result to adjust the wheel hub (100) to a predetermined pasting position; S3. Clean the surface of the wheel hub (100) to ensure that there is no dust, oil or other impurities in the area where the UV sticker is to be pasted; S4, providing a soft plastic film (9), wherein the soft plastic film (9) is conformed to a predetermined area on the surface of the wheel hub (100) and has an opening (91) for exposing the surface of the predetermined area, wherein the predetermined area includes the surface of the spoke (140) and the junction area between the surface of the spoke (140) and the surface of the flange (110), and the soft plastic film (9) is adhered to the predetermined area; S5. Provide a UV sticker, wherein the UV sticker includes a UV layer of different colors and an electrostatic protective film and a self-adhesive glazed paper arranged on the front and back sides of the UV layer; S6, removing the self-adhesive glazed paper on the back of the UV sticker to expose the sticky surface, lightly pressing the sticky surface of the UV sticker onto the surface of the wheel hub (100) at the position of the opening (91), pressing the UV sticker to ensure that it is evenly adhered to the surface of the wheel hub (100); S7. After the pasting is completed, remove the electrostatic protective film on the surface of the UV sticker and ensure that the surface of the UV sticker is clean and has no scratches; S8, spraying a transparent coating on the surface of the wheel hub (100), and after the spraying of the transparent coating is completed, baking the transparent coating; S9. After the clear coating is baked, take out the wheel hub (100) and cool it down.

10. A wheel hub (100) coating process according to claim 9, characterized in that: The spraying thickness of the transparent coating is not less than 10 micrometers, the baking temperature of the transparent coating is controlled between 140-230°C, and after baking, the hardness is not less than 1H; the surface of the UV sticker is higher than the color paint surface of the wheel hub (100) and is located inside the transparent coating so as to give a three-dimensional effect to the eyes.

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