Hub paint spraying mold and hub paint spraying system

Abstract

The utility model discloses a hub paint spraying mold and a hub paint spraying system, and the mold comprises a mold body which is matched with the outer end face of a hub and used for covering the area, not needing paint spraying, of the outer end face and exposing the area to be painted; the cover plate is used for covering the bearing cavity outer port in the center area of the outer end face; the tray is located in a bearing cavity in the inner end face of the hub and used for covering an inner port in the bearing cavity; one end of the first connecting piece is connected with the tray, and the other end is connected with the cover plate or penetrates through the cover plate. The problems that in the hub paint spraying process, the wrapping and pasting error rate is high, the working efficiency is low, material waste is serious, and the dangerous waste generation amount is large can be well solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aircraft maintenance, in particular to a wheel hub paint spraying mold and a wheel hub paint spraying system. BACKGROUND

[0002] In the traditional paint spraying process of the aircraft wheel hub, the areas that do not need to be sprayed with primer or topcoat are protected by masking, which usually includes three steps: masking before spraying primer, masking before spraying topcoat, and removing the masking material after spraying. The areas that do not need to be sprayed are usually protected by pasting high-quality adhesive tape, which is torn off and discarded within a specified time after spraying. For example, the traditional paint spraying process mainly includes the following steps: pasting masking as needed (specifically, pasting adhesive tape or other materials to mask the areas that do not need to be sprayed with primer, leaving only the areas to be sprayed with primer exposed), spraying primer, leveling, drying, cooling, pasting masking as needed again (specifically, pasting adhesive tape or other materials to mask the areas that do not need to be sprayed with topcoat, leaving only the areas to be sprayed with topcoat exposed), spraying topcoat, leveling, drying, and cooling.

[0003] The above-mentioned pasting of masking is usually done manually, and the workers often need to repeatedly consult maintenance manuals and adjust the areas to be pasted with masking to avoid rework caused by masking errors. This not only has a very low work efficiency, but also is prone to masking errors and rework when multiple parts are sprayed at the same time. Moreover, the accuracy of pasting the areas to be masked on the wheel hub is greatly affected by the workers' experience and subjective and objective factors, making it difficult to ensure good and uniform paint spraying results. Furthermore, a large amount of waste paint and other hazardous waste materials are generated during the above-mentioned paint spraying process, which are difficult to dispose of.

[0004] Therefore, how to solve the problems of high error rate, low work efficiency, serious waste of materials (i.e., adhesive tape), and large amount of hazardous waste generated in the traditional paint spraying process is a technical problem that needs to be solved by those skilled in the art. CONTENT OF THE INVENTION

[0005] Therefore, the purpose of the present application is to provide a wheel hub paint spraying mold and a wheel hub paint spraying system, which can better solve the problems of high error rate, low work efficiency, serious waste of materials, and large amount of hazardous waste generated in the wheel hub paint spraying process.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A wheel hub paint spraying mold, comprising:

[0008] a mold body, which is adapted to the outer end surface of the wheel hub, and is used to cover the areas of the outer end surface that do not need to be sprayed with paint and expose the areas to be sprayed with paint;

[0009] a cover plate, which is used to cover the outer end port of the bearing cavity in the central area of the outer end surface.

[0010] a tray located in a bearing cavity of an inner end surface of the wheel hub, for covering an inner port in the bearing cavity;

[0011] a first connecting piece, one end of which is connected with the tray, and the other end of which is connected with or passes through the cover plate.

[0012] Optionally, in the wheel hub paint spraying mold, the wheel hub is provided with a plurality of ventilation holes arranged in sequence around the central axis and penetrating the inner and outer end surfaces.

[0013] The mold body is provided with a plurality of positioning portions corresponding to at least part of the ventilation holes.

[0014] Optionally, in the wheel hub paint spraying mold, a second connecting piece is further included.

[0015] The wheel hub is provided with a plurality of bolt holes arranged in sequence around the central axis and penetrating the inner and outer end surfaces.

[0016] The mold body is provided with a plurality of connecting portions corresponding to at least part of the bolt holes.

[0017] The second connecting piece can be arranged in the bolt hole, one end of which is clamped and limited with the inner end surface of the wheel hub, and the other end of which is detachably connected with the connecting portion.

[0018] Optionally, in the wheel hub paint spraying mold, the connecting portion includes a first magnet.

[0019] The second connecting piece includes a second magnet capable of being magnetically attracted to the first magnet.

[0020] Optionally, in the wheel hub paint spraying mold, the second connecting piece includes an operation end, a limiting portion, a shaft portion and a connecting end connected in sequence along the axial direction of the second connecting piece.

[0021] The operation end is used for hand operation.

[0022] The limiting portion is used for clamping and limiting with the inner end surface of the wheel hub.

[0023] The shaft portion is used for being arranged in the bolt hole.

[0024] The connecting end is used for being detachably connected with the connecting portion.

[0025] Optionally, in the wheel hub paint spraying mold, the mold body includes:

[0026] an end surface area for covering the outer end surface of the wheel hub.

[0027] a side area for covering a partial area of a circumferential side of the wheel hub close to the outer end face;

[0028] a plurality of reinforcing ribs arranged at intervals in the circumferential direction at the inner side joint of the end face area and the side area.

[0029] Optionally, in the wheel hub paint spraying mold described above, the tray comprises:

[0030] a tray body for being sleeved in the inner port;

[0031] a tray outer edge protruding radially on the circumferential side of the tray body and having a vertical height greater than zero between the top surface of the tray body and the tray outer edge for being connected with the inner end of the wheel hub.

[0032] Optionally, in the wheel hub paint spraying mold described above, the cover plate comprises:

[0033] a central through hole for passing the first connecting piece;

[0034] a cover plate body for being sleeved in the outer port of the bearing cavity, the inner side surface of which is provided with a weight-reducing groove;

[0035] a cover plate outer edge protruding radially on the circumferential side of the cover plate body and having a vertical height greater than zero between the bottom surface of the cover plate body and the cover plate outer edge for being connected with the outer end of the wheel hub.

[0036] Optionally, in the wheel hub paint spraying mold described above, the cover plate is composed of two or more cover plate units, and a telescopic spring for controlling the assembly and disassembly of the cover plate units is arranged between adjacent cover plate units.

[0037] Optionally, in the wheel hub paint spraying mold described above, the first connecting piece comprises:

[0038] a hanger rod, the bottom of which is connected with the tray, and the other end of which passes through the bearing cavity and the cover plate;

[0039] a hook at the top end of the hanger rod for hoisting the wheel hub.

[0040] A wheel hub paint spraying system comprises:

[0041] a conveying line capable of hoisting or horizontally placing a wheel hub provided with the wheel hub paint spraying mold described above and capable of at least moving the wheel hub from a spare part area to a paint spraying station;

[0042] a paint spraying device at the paint spraying station.

[0043] From the above technical solution can be seen, the hub paint spraying mold provided by the application can replace the adhesive tape to shield and protect the area of the hub surface which does not need to be sprayed. When the hub needs to be sprayed (sprayed with primer or topcoat), the mold is first installed on the hub, and then the mold is removed from the hub after the spraying is completed, and the mold is ready for the next use, that is, the mold can be reused. In addition, since each mold is designed according to the actual structure shape and shielding requirements of the hub to which it is adapted, it can be assembled on the hub through simple operation, can be reused, and does not need to be attached and cleaned with adhesive tape, so that not only can the rework caused by work errors be avoided, the spraying quality can be better controlled, but also the work efficiency can be effectively improved, and it is also beneficial to reduce the generation of hazardous waste such as adhesive tape. According to actual measurement and verification, in the entire spraying process flow, by using the mold provided by the application to shield the specific area of the hub instead of adhesive tape, the work efficiency of spraying preparation can be significantly improved, and the spraying efficiency can be increased by at least three times or more.

[0044] The hub paint spraying system provided by the application can significantly improve the work efficiency of spraying preparation, and can avoid rework caused by work errors, better control the spraying quality, and reduce the generation of hazardous waste such as adhesive tape. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0046] Figure 1 A structure schematic view of a hub paint spraying mold and a hub combined by the hub paint spraying mold provided by the embodiments of the application.

[0047] Figure 2 A structure schematic view of a hub paint spraying mold and a hub combined by the hub paint spraying mold provided by the embodiments of the application. Figure 1 A bottom view of the combined structure shown in the embodiments of the application.

[0048] Figure 3 An axonometric view of a mold body provided by the embodiments of the application.

[0049] Figure 4 A front view of a mold body provided by the embodiments of the application.

[0050] Figure 5 A structure schematic view of a first connecting piece and a tray combined for hoisting provided by the embodiments of the application.

[0051] Figure 6 A half-sectional view of a tray provided by the embodiments of the application.

[0052] Figure 7 For Figure 6 The top view of the tray shown in FIG.

[0053] Figure 8 , Figure 9 , Figure 10 The axonometric view, the front view and the side view of a cover plate provided by the embodiment of the present application, respectively.

[0054] Figure 11 The exploded structural schematic view, the front view and the side view of another spliced cover plate provided by the embodiment of the present application, respectively.

[0055] Figure 12 and Figure 13 The front view and the side view of a splicing unit in the spliced cover plate shown in FIG. Figure 11

[0056] Figure 14 The front view and the axonometric view of a second connecting piece provided by the embodiment of the present application, respectively. Figure 15 Among them:

[0057] 1-hub, 2-mold body, 3-vent, 4-cover plate, 4'-cover plate unit,

[0058] 5-hanger, 6-hanging hook, 7-tray, 8-elastic spring,

[0059] 9-second connecting piece, 10-bearing cavity,

[0060] 21-end surface area, 22-side surface area, 23-connection part, 24-strengthening rib, 25-positioning part,

[0061] 40-central through hole, 41-cover plate outer edge, 42-cover plate body,

[0062] 43-weight reduction groove, 44-groove, 45-mounting hole,

[0063] 71-tray body, 72-tray outer edge, 711-facade, 712-top surface,

[0064] 91-connection end, 92-shaft part, 93-limiting part, 94-operation end,

[0065] 941-elongated column, 942-limiting cap.

[0066] DETAILED DESCRIPTION

[0067] ​​First of all, it needs to be explained that the hub in this application can be an outer half hub, or an outer half hub. In order to make the description clearer, the following will take the Boeing 757-200 aircraft main hub and its adapted paint spraying mold as an example, and make a specific introduction combined with the related drawings. In order to make a clear and complete description of the technical solutions in the embodiments of the present application, it is obvious that the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0068] Please refer to Figure 1 and Figure 2 , the embodiment of the present application provides a hub paint spraying mold, which is referred to as a mold. The mold mainly includes a mold body 2, a cover plate 4, a tray 7 and a first connecting piece. Among them: the mold body 2 is matched with the outer end face of the hub 1, used to cover the area of the outer end face which does not need to be sprayed, and expose the area to be sprayed; the cover plate 4 is used to cover the outer end port of the bearing cavity in the central area of the outer end face, generally, the diameter of the cover plate 4 is greater than the inner diameter of the outer end port of the bearing cavity in the central area of the outer end face of the hub 1, used to shield the outer end port; the tray 7 is located in the bearing cavity 10 of the inner end face of the hub 1, used to cover the inner end port in the bearing cavity 10, generally, the diameter of the tray 7 is greater than the diameter of the inner end port in the bearing cavity 10 of the inner end face of the hub 1, used to cover the inner end port and limit the clamping; one end of the first connecting piece is connected with the tray 7, and the other end is connected with the cover plate 4 or passes through the cover plate 4. It needs to be explained here that in the flat spraying process (i.e. spraying paint on the hub 1 placed flat in a predetermined position), the first connecting piece is a screw rod; in the hoisting type spraying process (i.e. spraying paint on the hub 1 hoisted in a predetermined position), the first connecting piece is a Figure 1 and Figure 5 shown in the boom 5.

[0069] When the hub 1 needs to be sprayed (sprayed with primer or topcoat), the mold is first installed on the hub 1, and then the mold is removed from the hub 1 after the spraying is completed, waiting for the next use, that is, the mold can be reused. It can be seen that the mold provided by the embodiment of the present application can replace the adhesive tape to shield and protect the area of the hub surface which does not need to be sprayed. Since each mold is designed according to the actual structure shape and shielding requirements of the hub 1 it is matched with, it can be assembled on the hub 1 through simple operation, can be reused, does not need to be attached and cleaned with adhesive tape, so as to not only avoid rework caused by work errors, better control the quality of spraying, but also effectively improve the work efficiency, and is also beneficial to reduce the generation of dangerous waste such as adhesive tape. According to the actual measurement verification, in the whole spraying process flow process, by replacing the adhesive tape with the mold provided by the present application to shield the specific area of the hub 1, the work efficiency of the spraying preparation can be significantly improved, and the spraying efficiency can be improved by at least more than three times.

[0070] In particular implementation, the precision machining is preferably used to control the mold size accuracy to ensure good shielding effect. Moreover, the special Teflon material is selected to make the mold body to ensure that the mold can be repeatedly used and does not deform frequently.

[0071] Please refer to Figure 3 and Figure 4 , in some embodiments, the mold body 2 includes an end face area 21 and a side area 22, and a plurality of reinforcing ribs 24. Among them, the end face area 21 is used to cover the outer end face of the hub 1; the side area 22 is used to cover the part of the circumferential side of the hub 1 close to the outer end face; the plurality of reinforcing ribs 24 are located at the inner side connecting part of the end face area 21 and the side area 22, and are arranged along the circumference of the mold body 2, that is, the inner corner of the mold body 2 towards the hub 1, a plurality of reinforcing ribs 24 are arranged along the circumference, through the reinforcing ribs 24, the mold body 2 has higher structural stability, so that it can be repeatedly used and always maintain good cooperation with the hub 1, to ensure good shielding effect.

[0072] In some embodiments, the hub 1 is provided with a plurality of ventilation holes 3 arranged in sequence around the center axis through the inner and outer end faces; correspondingly, the mold body 2 is provided with a plurality of positioning parts 25, and the plurality of positioning parts 25 correspond one-to-one with at least part of the ventilation holes 3. Thus, the mold body 2 and the hub 1 can be positioned through the ventilation holes 3 on the hub 1 and the positioning parts 25 on the mold body 2. Please refer to Figure 1 , Figure 3 and Figure 4 , in particular implementation, the positioning part 25 can be an arc-shaped side edge matched with the part of the side edge of the ventilation hole 3 located on the outer end face of the hub 1.

[0073] Please refer to Figures 1 to 4 , when making the mold body 2, first measure the area to be shielded of the inner and outer half hub, measure the outer circle diameter, inner circle diameter, ventilation hole diameter, bolt hole division position, reinforcing rib distribution and other sizes with the bearing center as the center, and design the structure shape and size of the mold body 2; and select Teflon block material with thickness meeting the requirements, program the whole precision machining on the numerical control machine tool, and inlay the first magnet (specifically high-temperature-resistant magnet) at the bolt hole division position to form the connecting part 23 shown in Figure 1 and Figure 3 , so as to realize the quick disassembly and assembly of the mold body 2 and the hub 1 through the second connecting piece 9 capable of being adsorbed and matched with the first magnet. When installing and using, first combine the mold body 2 with the hub 1, position through the cooperation of the positioning part 25 and the ventilation hole 3, and insert the second connecting piece 9 of the plunger structure from the back of the hub 1 (see Figure 2 , Figure 14 and Figure 15). The second connecting piece 9 is preferably installed in a cross installation method to ensure uniform stress distribution. The mold body 2 is integrally machined and shaped, and has a large diameter. When stored, it needs to be placed flat on the storage rack to avoid stress deformation affecting the sealing performance of the matching surface.

[0074] In some embodiments, the mold body 2 can be clamped and fixed from the inside and outside of the hub through the connecting bolts passing through the bolt holes according to the shielding requirements of the half hub bolt hole position. The installed hub paint spraying mold simultaneously shields the inner and outer half hub matching surface and the bolt hole position. In order to solve the problem of mold fastening, a connecting bolt made of Teflon can be used as a fastener, but each bolt needs to be repeatedly tightened and loosened during installation, which is too low in efficiency. Therefore, some embodiments provided by the application adopt the process of embedding a button type high temperature magnet in the mold body 2, and the second connecting piece 9 of the quick plunger structure can efficiently complete the quick disassembly and assembly of the mold body 2 and the hub 1.

[0075] For details, please refer to Figure 1 and Figure 2 , and Figure 14 and Figure 15 , the hub paint spraying mold provided by the embodiments of the application further comprises a second connecting piece 9 in the form of a plunger. The hub 1 is provided with a plurality of bolt holes passing through the inner and outer end faces and arranged in sequence around the central axis. Correspondingly, the mold body 2 is provided with a plurality of connecting portions 23, and the plurality of connecting portions 23 correspond one-to-one to at least part of the bolt holes. When the mold body 2 is installed on the hub 1, the second connecting piece 9 is arranged in the bolt hole of the hub 1, one end of the second connecting piece 9 is limited by the inner end face of the hub 1, and the other end is detachably connected with the connecting portion 23. At this time, the connecting portion 23 comprises a first magnet (specifically a high temperature resistant magnet), and the second connecting piece 9 comprises a second magnet (specifically a high temperature resistant magnet) capable of being magnetically attracted to the first magnet, please refer to the connecting end 91 shown in Figure 14 , Figure 15 . Thus, the mold body 2 can meet the requirement of quick disassembly and assembly through the second connecting piece 9.

[0076] Further, as Figure 14 , Figure 15As shown in the middle, the second connecting piece 9 includes operation end 94, limiting part 93, shaft part 92, connecting end 91 connected in turn along the self axial direction. Among them: the operation end 94 includes an extension column 941 and a limiting cap 95, which is used for facilitating the staff to hold and operate; the limiting part 93 is used for limiting with the inner end face of the hub 1, and can shield the inner port of the bolt hole; the shaft part 92 is used for being arranged in the bolt hole; the connecting end 91 is used for being detachably connected with the connecting part 23. Thus, through the second connecting piece 9, the mold body 2 can meet the demand of quick disassembly, and through the connecting part 23 of the mold body 2, not only the mold body 2 and the hub 1 can be well adhered, but also the shielding demand of the plurality of bolt holes on the hub 1 can be met. In specific implementation, when the mold body 2 is installed on the hub 1, the second connecting piece 9 is quickly inserted from the inner side of the hub 1, and since the second connecting piece 9 is provided with the second magnet, it can be automatically connected with the connecting part 23 of the mold body 2, the both ends of the bolt hole on the hub 1 are shielded, and the mold body 2 and the hub 1 are fixed in the circumferential direction; after painting, when the mold body 2 needs to be disassembled from the hub 1, the mold body 2 is directly taken down, and the plurality of second connecting pieces 9 and the hub 1 are separated at one time, without the need of disassembling the second connecting pieces 9 one by one, so the operation efficiency is higher.

[0077] In specific implementation, according to the requirements of each piece number hub shielding area, the cover plate 4 and the tray 7 used for shielding the both ends of the bearing cup in the bearing cup area of the mold can be made, wherein the tray 7 can be configured with the hanging type and the flat type cover plate and tray according to the selected painting mode. The typical hanging type tray can be seen from Figures 5 to 7 , the tray 7 is designed as a bearing tray and shields the bearing cup area by using the bearing capacity of the tapered bearing cup. In addition, the flat type cover plate can be seen from Figures 8 to 10 , the central through hole 40 is used for installing the connecting bolt; the hanging type cover plate can be seen from Figures 11 to 13 , the central through hole 40 is used for passing through the suspender 5 (at this time, the central through hole 40 cooperates with the suspender 5 to ensure the sealing property). Among them, in order to facilitate installation, the hanging type cover plate can be designed as a spliced structure, for example, divided into two halves with the center line, and connected in the middle by using the spring 8, which not only facilitates installation, but also ensures that the installation and disassembly state is managed as a whole.

[0078] Specifically, please see Figures 5 to 7 , the tray 7 includes a tray body 71 and a tray outer edge 72. Among them: the tray body 71 is used for being sleeved in the bearing cup inner port, and its diameter is smaller than that of the bearing cup inner port, when the bearing cup inner port is tapered, the tray body 71 is a frustum structure matched with it, that is Figure 5The side surface 712 of the middle tray body 71 is a tapered side surface; or, when the inner port of the bearing cup is cylindrical, the tray body 71 can also be designed as a frustum structure with a taper angle of about 30° to 45°, for example 35°, for the convenience of setting the tray body 71 in the inner port of the hub 1. In addition, the tray outer edge 72 is radially protrudingly arranged on the circumferential side of the tray body 71, and has a vertical height greater than zero (i.e. Figure 6 a is greater than zero) between the top surface 712 of the tray body 71 and the tray outer edge 72, and in addition, the axial thickness b of the tray outer edge 72 is less than a; the tray outer edge 72 is used to be clamped with the bearing cup inner port of the inner side surface of the hub 1 to shield it. Specifically, the tray outer edge 72 is annular, and its outer diameter is greater than the diameter of the bearing cup inner port; the circumferential side of the tray outer edge 72 can also be tapered, similar to a chamfer structure, and the included angle between it and the tray bottom end surface is about 30° to 60°, for example 45°.

[0079] In some embodiments, if the flat spraying mode is selected, the specific structure of the cover plate 4 can be seen in Figures 8 to 10 At this time, the connecting screw is used as the first connecting piece for connecting the tray 7 and the cover plate 4, one end of the connecting screw is fixedly connected with the tray 7, and the other end passes through the cover plate 4 and is tightened with a nut. Specifically, the cover plate 4 includes a cover plate body 42 and a cover plate outer edge 41. The cover plate body 42 is used to be set in the bearing cavity outer port, and the inner side surface thereof is provided with a weight-reducing groove 43; in addition, the cover plate body 42 is provided with a center through hole 40 for passing the first connecting piece; the cover plate outer edge 41 is used to be clamped with the outer end of the hub 1, and is radially protrudingly arranged on the circumferential side of the cover plate body 42, and has a vertical height greater than zero between the bottom surface of the cover plate body 42.

[0080] In some embodiments, if the hanging spraying mode is selected, the hub is hung on the conveying line (such as a circulating hanging chain) for spraying, and the first connecting piece for connecting the tray 7 and the cover plate 4 includes a hanging rod 5 and a hook 6. The bottom of the hanging rod 5 is connected with the tray 7, and the other end passes through the bearing cavity 10 and the cover plate 4; the hook 6 is located at the top end of the hanging rod 5 and is used to hang the hub 1. Correspondingly, to meet the requirement of quick disassembly, the specific structure of the cover plate 4 can be seen in Figures 11 to 13At this time, the cover plate 4 is composed of two or more cover plate units 4' spliced together, and a telescopic spring 8 for controlling the splicing and separation of the cover plate units 4' is arranged between adjacent cover plate units 4'. Specifically, the cover plate unit 4' is not only provided with the cover plate body 42, the cover plate outer edge 41, the center through hole 40 (sealedly connected with the hanger rod 5), and the weight-reducing groove 43 described above, but also provided with a mounting hole 45 for mounting the telescopic spring 8, and a groove 44 for fixing the telescopic spring 8. The spring force of the telescopic spring 8 can keep the adjacent cover plate units 4' spliced together in a sealed manner. Generally, the inside of the bearing cavity is only sprayed with a primer and not with a topcoat. When installing the spliced cover plate 4, the hanger hook 6 does not need to be removed from the hanger rod 5. It only needs to be installed into position from both sides of the hanger hook, and the telescopic spring 8 embedded inside can combine the two adjacent cover plate units 4' together, ensuring a tight seal and preventing penetration during painting. After the primer is sprayed and dried, the cover plate units 4' can be removed from the hanger rod 5 by pulling them apart.

[0081] In specific implementation, the structure, shape, and size of the cover plate 4 and the tray 7 can be adaptively designed according to the inner and outer hub bearing cups. At this time, the upper and lower diameters and thickness of the tapered bearing cup need to be measured, the center is opened, the periphery is left with a wing-shaped circle to shield the end face of the bearing cup, a thickness of the iron fluoride block that meets the requirements is selected, and the whole is precisely processed and formed on a numerical control machine tool, and the hanger hook 6 and the hanger rod 5 or the connecting screw are selected and installed according to the painting mode of hoisting or laying. When installing, it is first checked whether the cover plate 4 and the tray 7 and the bearing cup mating surface are clean to avoid adhering metal residues to scratch the bearing cup. The cover plate 4 and the tray 7 are passed through the hub bearing cavity 10 together with the hanger hook 6 and the hanger rod 5 or the connecting screw, and then the hanger hook 6 is switched to be hoisted on the circulating suspension chain by a conversion tool. At this time, the tray 7 in the mold is used as a hoisting force disc of the hub 1. If the painting mode of laying is selected, the connecting screw is connected at one end Figure 6 The tray 7 shown, and the other end is passed through Figure 8 the cover plate 4 and tightened with a nut. It should be noted that the periphery of the tray 7 and the cover plate 4 has a relatively thin wing-shaped circumferential shielding ring (i.e., the tray outer edge 72 and the cover plate outer edge 41). During assembly and disassembly operations and storage, attention should be paid to protection to avoid collision and deformation. The part matched with the bearing cup needs to be kept clean to ensure that no metal debris and other substances are adhered to scratch the bearing cup.

[0082] In practical implementation, the bolt holes are shielded by the second connector 9 of the plunger structure. The second connector 9 serves two purposes: it secures the mold body and shields the areas around the bolt holes that do not require painting. The shielding around the bolt holes is circular. A rod of appropriate diameter is selected based on the bolt hole depth, hole diameter, and shielding area diameter. This rod is precision-machined using a CNC machine tool, with the operating end shaped like a handle for easy insertion and removal. A high-temperature magnet is embedded at the other end. When inserted into the bolt hole, it attracts and engages with the connecting part 23 on the mold body 2, ultimately ensuring that the limiting part 93 of the second connector 9, the mold body 2, and the hub 1 are fitted together, preventing paint leakage during the painting process. In practical implementation, the magnet embedded in the plunger head (i.e., Figure 14 and Figure 15 The connecting end 91 shown is small. During use, it is necessary to avoid dropping it to prevent damage or detachment of the magnet. The second connecting parts 9 of different part numbers of wheel hubs must be strictly classified and stored to avoid mixing and misuse, which may result in ineffective installation.

[0083] This application embodiment also provides a wheel hub painting system, which includes a conveyor line and a painting equipment. The conveyor line is used to hoist or horizontally place the wheel hub 1, which is equipped with the wheel hub painting mold described above, and can at least transfer the wheel hub 1 from the spare parts area to the painting station via the conveyor line; the painting equipment is located at the painting station and is used to spray primer or topcoat onto the wheel hub 1.

[0084] In practice, this wheel painting system is equipped with multiple wheel painting molds for various wheel hubs with different part numbers. All components within the wheel painting molds are numbered and categorized according to the wheel hub part number. Workers select and install the mold based on the wheel hub part number to be painted. Molds with different part numbers cannot be installed correctly, effectively avoiding rework issues caused by relying on memory or frequently consulting maintenance manuals for incorrect masking.

[0085] In summary, the wheel hub painting mold provided in this application can significantly improve the efficiency of painting preparation. According to actual calculations and verifications, the painting efficiency is increased by at least three times during the entire painting process. Furthermore, the wheel hub painting system provided in this application also incorporates a robotic arm automatic painting device and a robotic arm for automatically installing / removing the aforementioned painting mold, thereby further improving work efficiency and reducing labor costs.

[0086] It should be noted that the hub paint spraying mold provided by the embodiments of the present application is measured and manufactured according to the specified hub, and the manufacturing method can be extended to other hubs, but the area that needs to be shielded needs to be performed according to the maintenance manual, the paint spraying requirements of different manufacturers are different, and there are slight differences in the manufacturing of some structural shapes or accessories. The present application only takes the 757 aircraft hub as an example for illustration, and does not limit the above-mentioned hub paint spraying mold and hub paint spraying system to be used only for the 757 aircraft hub. Moreover, it should be noted that the hub paint spraying mold provided by the embodiments of the present application needs to withstand the drying process required by the paint spraying process, and the temperature is as high as 80 degrees Celsius or above. The mold needs to be used repeatedly without deformation under high-temperature baking. After a large number of tests, special Teflon material is selected as the main structure to meet the finishing process, withstand high-temperature baking without deformation, and better peel off residual paint. In addition, in order to avoid rework caused by shielding errors, the high machining precision of the hub paint spraying mold provided by the present application can ensure that there is no deviation during installation, the spraying effect of the same hub is consistent, and the spraying quality problem caused by irregular paper is avoided. At the same time, each paint spraying mold is marked according to the hub part number, and the worker checks and installs according to the part number, effectively avoiding the possibility of shielding errors. The high machining precision ensures that the mold is highly attached to the hub, even if the wrong mold is taken, it cannot be installed in place, effectively avoiding the rework problem caused by installation errors.

[0087] Finally, it should be noted that in this document, the terms such as first and second are used only 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. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed.

[0088] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between various embodiments can be referred to each other.

[0089] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wheel hub paint spraying mold characterized by, The application relates to a mold for a wheel hub (1) comprising: a mold body (2) adapted to the outer end face of the wheel hub (1) for covering the area of the outer end face that does not need to be painted and exposing the area to be painted; a cover plate (4) for covering the outer end port of the bearing cavity in the central area of the outer end face; a tray (7) located in the bearing cavity (10) of the inner end face of the wheel hub (1) for covering the inner end port in the bearing cavity (10); a first connecting piece having one end connected to the tray (7) and the other end connected to or passing through the cover plate (4).

2. The wheel hub paint spray mold of claim 1, wherein, The wheel hub (1) is provided with a plurality of ventilation holes (3) penetrating the inner and outer end faces and arranged in sequence around the central axis; The mold body (2) is provided with a plurality of positioning parts (25) corresponding to at least part of the ventilation holes (3).

3. The wheel hub paint spray mold of claim 1, wherein, Further comprising a second connecting piece (9); The wheel hub (1) is provided with a plurality of bolt holes penetrating the inner and outer end faces and arranged in sequence around the central axis; The mold body (2) is provided with a plurality of connecting parts (23) corresponding to at least part of the bolt holes; The second connecting piece (9) can be arranged in the bolt hole, one end is limited by the inner end face of the wheel hub (1), and the other end is detachably connected with the connecting part (23).

4. The wheel hub paint spray mold of claim 3, wherein, The connecting part (23) comprises a first magnet; The second connecting piece (9) comprises a second magnet capable of being magnetically matched with the first magnet.

5. The wheel hub paint spray mold of claim 3, wherein, The second connecting piece (9) comprises an operation end (94), a limiting part (93), a shaft part (92) and a connecting end (91) connected in sequence along the axial direction of the second connecting piece (9), wherein: The operation end (94) is used for hand operation; The limiting part (93) is used for limiting the inner end face of the wheel hub (1); The shaft part (92) is used for being arranged in the bolt hole; The connecting end (91) is used for being detachably connected with the connecting part (23).

6. The wheel hub paint spray mold of claim 1, wherein, The mold body (2) comprises: an end face area (21) for covering the outer end face of the wheel hub (1); a side face area (22) for covering part of the circumferential side face of the wheel hub (1) close to the outer end face; a plurality of reinforcing ribs (24) located at the inner side connecting part of the end face area (21) and the side face area (22) and arranged in sequence in the circumferential direction.

7. The wheel hub paint spray mold of claim 1, wherein, The tray (7) comprises: a tray body (71) for being arranged in the inner end port; a tray outer edge (72) protruding radially on the circumferential side of the tray body (71) and having a vertical height greater than zero between the top surface (712) of the tray body (71); the tray outer edge (72) is used for being limited by the inner end of the wheel hub (1); and / or, The cover plate (4) comprises: a central through hole (40) for arranging the first connecting piece; a cover plate body (42) for being arranged in the bearing cavity outer end port, and the inner side surface of the cover plate body (42) is provided with a weight-reducing groove (43); a cover plate outer edge (41) protruding radially on the circumferential side of the cover plate body (42) and having a vertical height greater than zero between the bottom surface of the cover plate body (42); the cover plate outer edge (41) is used for being limited by the outer end of the wheel hub (1).

8. The wheel hub paint spray mold of claim 1, wherein, The cover plate (4) is composed of two or more cover plate units (4'), and a telescopic spring (8) is arranged between adjacent cover plate units (4') for controlling the assembly and disassembly of the cover plate units (4').

9. The wheel hub paint spray mold of claim 1, wherein, The first connecting piece comprises: A boom (5) is connected with the tray (7) at the bottom and passes through the bearing cavity (10) and the cover plate (4) at the other end; A hook (6) is arranged at the top end of the boom (5) and used for hoisting the wheel hub (1).

10. A wheel hub paint spraying system characterized by, The method comprises: A conveying line is capable of hoisting or horizontally placing the wheel hub (1) provided with the wheel hub paint spraying mold according to any one of claims 1 to 9, and at least capable of moving the wheel hub (1) from a spare part area to a paint spraying station; A paint spraying device is arranged at the paint spraying station.

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