A processing technology for a wheel with full rim bright surface and multiple sizes of replaceable inserts

Abstract

The invention discloses a processing technology for a wheel with a full rim bright surface and multiple sizes of replaceable inserts, comprising the following steps: (1) smelting an aluminum alloy material to obtain aluminum liquid; (2) taking the aluminum liquid in step (1) out of the furnace and degassing it with high-purity nitrogen, and transferring it into a low-pressure casting machine insulation furnace to be heat-insulated at 680-700°C; (3) applying pressure so that the aluminum liquid in step (2) enters a liquid riser to be raised and fills a hub mold cavity, and then maintaining the pressure for 220-280s; (4) opening the mold, taking out the casting, and conveying the casting into a heat treatment solution furnace by automatic rolling, and heating it to 540±5°C; disconnecting the connection between the spoke and the rim, and connecting it to the rim by installing the insert. With this structure, the entire rim at the front can be cut by a lathe, thereby improving the surface finish; and the insert can visually realize the connection between the rim and the spoke, thereby improving the high-end sense of the appearance of the hub.

Description

Technical field:

[0001] The invention relates to the technical field of automobile parts, and more particularly to a processing technology for a wheel with full rim bright surface and multiple sizes of replaceable inserts. Background technology:

[0002] Conventional aluminum alloy wheels have spokes connected to the rim, that is, the outer ends of the spokes are formed on the rim at the front side of the rim. This structure has several disadvantages:

[0003] 1. The wall thickness of the connection between the spokes and the rim is very thick, which is prone to shrinkage during casting, easy to break and increase the failure rate, and the weight of the wheel is also heavy;

[0004] 2. Because the outer ends of the spokes are formed onto the rim, the wheel with this structure cannot achieve the effect of polishing the entire rim, and the rim cannot be machined and cut as a whole using a lathe, which makes it unable to meet the needs of some users. Summary of the invention:

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a processing technology for a full-rim bright-surface multi-size replaceable insert wheel, which disconnects the connection between the spokes and the rim and connects them to the rim by installing inserts. This structure allows the entire circle of the rim at the front to be cut by a lathe to improve the surface finish; and the inserts can visually realize the connection between the rim and the spokes, thereby enhancing the high-end feel of the wheel hub's appearance.

[0006] The solution of the present invention to solve the technical problem is:

[0007] A processing technology for a wheel with full rim bright surface and multiple sizes of replaceable inserts comprises the following steps:

[0008] (1) Smelting the aluminum alloy material to obtain aluminum liquid;

[0009] (2) The aluminum liquid in step (1) is taken out of the furnace and degassed with high-purity nitrogen, and then transferred into a low-pressure casting machine holding furnace for holding at 680-700° C.;

[0010] (3) Pressurizing the aluminum liquid in step (2) to enter the liquid riser and fill the wheel hub mold cavity, and then maintaining the pressure for 220-280 seconds;

[0011] (4) Open the mold, take out the casting, and convey the casting into a heat treatment solution furnace through automatic rolling, heat it to 540±5℃, keep it at this temperature for 4.5h to 6h, immerse it in water within 25s, and control the water temperature at 80±5℃. Then, pass it through a heat treatment aging furnace, with an aging temperature of 160±5℃ and a holding time of 2.5h. After aging treatment, the automobile wheel hub casting is cooled to room temperature;

[0012] (5) The casting cooled to room temperature is transported to a machining device for surface cutting so that its surface dimensions meet the design requirements. At the same time, the middle part of the front wall surface of the outer end of the spoke is cut into a mounting groove extending backward. Then, the casting is transported to a coating room for coating of its front end surface.

[0013] (6) Place the painted hub body in a CNC lathe, clamp it, and then turn the front wall of the rim at the front of the hub body to a full circle, so that the surface roughness reaches 0.8 μm to 1.0 μm;

[0014] (7) The hub body of step (6) is transported to a coating room, and transparent powder is sprayed on the front wall of the wheel rim (14) at the front thereof, and at the same time, the remaining unsprayed parts of the hub body are all sprayed;

[0015] (8) Insert the installation groove on the wheel hub body of step (7) into the lower vertical embedding portion of the installation insert and fix it with bolts, so that the installation groove matches the lower vertical embedding portion of the insert.

[0016] In the steps (5) and (7), except for the front wall of the wheel rim at the front that is machined, the rest of the wheel rim is sprayed with black or other dark paint.

[0017] The insert is injection molded, and its surface is sprayed with paint.

[0018] The hub body comprises a hub portion, a spoke and a rim. The spoke comprises a plurality of spokes. The inner end of each spoke is formed on the hub portion, and the outer end of each spoke is formed on the rim below the wheel flange at the front portion.

[0019] The outer end of the rear portion of the insert is close to or in close contact with the front wall surface of the corresponding position of the wheel rim at the front portion.

[0020] An extension portion extending rearward is formed on the rear wall surface at the outer end of the spoke, and the rear end of the extension portion is formed on the front side wall of the rim below the wheel flange at the front portion.

[0021] A long through slot extending outward is formed in the middle of each spoke, a mounting groove extending backward is formed in the middle of the front wall surface of the outer end of the spoke, the outer end of the mounting groove extends out of the outer end surface of the spoke, and the inner end of the mounting groove extends out of the outer end surface of the long through slot of the spoke.

[0022] The locking cam of the bolt is inserted into the annular groove formed on the inner wall of the locking cam, and the locking cam is pressed against the locking cam of the locking cam, and the locking cam is pressed against the locking cam of the locking cam.

[0023] The upper raised strip and the lower raised strip are used to improve the connection, fixation and position limiting between the insert and the hub body, so that the insert is not easily rotated or offset, thereby ensuring the accuracy of the fixed position.

[0024] The outstanding effects of the present invention are:

[0025] Compared with the existing technology, it disconnects the connection between the spokes and the rim and connects them to the rim by installing inserts. This structure allows the entire rim at the front to be lathe-cut to improve the surface finish, and to be sprayed with transparent powder to increase the brightness of the entire rim. The inserts can visually connect the rim and the spokes, enhancing the high-end look of the wheel hub. Moreover, the connection between the spokes and the rim is disconnected, so that this part does not need to be too thick, which reduces the weight of the wheel hub, achieves lightweight, reduces shrinkage problems, and improves the pass rate. Description of the drawings:

[0026] Figure 1 It is a partial structural schematic diagram of the hub body of the present invention;

[0027] Figure 2 is a partial cross-sectional view of a hub body of the present invention;

[0028] Figure 3 yes Figure 2 A partial enlarged view of

[0029] Figure 4 It is a schematic diagram of the structure of the insert;

[0030] Figure 5 It is a schematic diagram of the partial structure of the hub body without the insert. Specific implementation method:

[0031] For example, see Figures 1 to 5 As shown, a processing technology for a full rim bright surface multi-size replacement insert wheel includes the following steps:

[0032] (1) Smelting aluminum alloy material (such as A356) to obtain aluminum liquid;

[0033] (2) The aluminum liquid in step (1) is taken out of the furnace and degassed with high-purity nitrogen, and then transferred into a low-pressure casting machine holding furnace for holding at 680-700° C.;

[0034] (3) Pressurizing the aluminum liquid in step (2) to enter the liquid riser and fill the wheel hub mold cavity, and then maintaining the pressure for 220-280 seconds;

[0035] (4) Open the mold, take out the casting, and convey the casting into a heat treatment solution furnace through automatic rolling, heat it to 540±5℃, keep it at this temperature for 4.5h to 6h, immerse it in water within 25s, and control the water temperature at 80±5℃. Then, pass it through a heat treatment aging furnace, with an aging temperature of 160±5℃ and a holding time of 2.5h. After aging treatment, the automobile wheel hub casting is cooled to room temperature;

[0036] (5) The casting cooled to room temperature is transported to the machining equipment for surface cutting so that its surface size meets the design requirements.

[0037] The above steps are basically the same as the existing known wheel hub casting process, and will not be described in detail here.

[0038] However, the present embodiment is different in that the hub body 100 cast by the hub mold used in the present application includes a hub portion 11, spokes 12 and a rim 13, wherein the spokes 12 include a plurality of spokes 121, and the inner end of each spoke 121 is formed on the hub portion 1), and the outer end is formed on the rim 13 below the rim 14 at the front, that is, the front rim 14 is disconnected from the outer end of the spoke 121.

[0039] Then, the middle part of the front wall surface of the outer end of the spoke 121 is cut to form a mounting groove 124 extending backward, and then it is transported to the coating room for coating of its front end surface;

[0040] (6) placing the painted hub body 1) in a CNC lathe, clamping it, and turning the front wall surface of the rim 14 at the front of the hub body 1) to a full circle, so that the surface roughness reaches 0.8 μm to 1.0 μm;

[0041] (7) The hub body 10 of step (6) is transported to a coating room, and transparent powder is sprayed on the front wall of the wheel rim (14) at the front thereof, and at the same time, the remaining unsprayed parts of the hub body 10 are all sprayed;

[0042] (8) Insert the installation groove 124 on the hub body 10 of step (7) into the lower vertical embedding portion 21 of the installation insert 20 and fix it with bolts 2. The installation groove 124 cooperates with the outer wall surface of the lower vertical embedding portion 21 of the insert 20 to ensure that the installation is firmly fixed.

[0043] Furthermore, in step (5) and step (7), except for the front wall surface of the rim 14 at the front that is turned, the rest is sprayed with black or other dark paint.

[0044] Furthermore, the insert 20 is injection molded and can be made of PC+ABS material, and its surface is sprayed with paint. It can be sprayed with the same color as the hub body 10, such as black, or it can be sprayed with different colors according to different requirements.

[0045] Furthermore, the outer end of the rear portion of the insert 20 is close to or in close contact with the front wall surface of the corresponding position of the rim 14 at the front portion.

[0046] The spokes 121 are disconnected from the front wheel rim 14. This structure enables the front wheel rim 14 to be turned in a full circle by a lathe tool after the hub body 10 is fixed by a CNC machine tool fixture, thereby improving the surface finish.

[0047] Moreover, the spokes 121 are disconnected from the front rim 14, so that the thickness of the formed part here is greatly reduced, reducing the weight of the entire wheel hub and achieving lightweight. The reduced thickness also reduces shrinkage problems and improves the pass rate. It is also not easy to break here.

[0048] Furthermore, an extension portion 122 extending backward is formed on the rear wall surface at the outer end of the spoke 121, and the rear end of the extension portion 122 is formed on the front side wall of the rim 13 below the rim 14 at the front.

[0049] Each of the spokes 121 is formed with an outwardly extending elongated through slot 123 in the middle, and a rearwardly extending mounting groove 124 is formed in the middle of the front wall surface of the outer end of the spoke 121. The outer end of the mounting groove 124 extends out of the outer end surface of the spoke 121, and the inner end of the mounting groove 124 extends out of the outer end surface of the elongated through slot 123 of the spoke 121.

[0050] The middle part of the front wall of the installation groove 124 is formed with a screw hole 1, the insert 20 includes a lower vertical inlay portion 21, the upper part of the rear wall of the lower vertical inlay portion 21 is formed with an upper raised strip 22, and the lower part is formed with a lower raised strip 23, the middle part of the lower vertical inlay portion 21 is formed with a front middle through hole 211, and the front middle through hole 211 corresponds to the corresponding screw hole 1, the lower vertical inlay portion 21 is nested in the installation groove 124, the rear wall of the lower vertical inlay portion 21 is pressed against the rear wall of the installation groove 124, and the left and right side walls of the lower vertical inlay portion 21 are tightly attached to the corresponding The left and right inner walls of the installation groove 124 are matched with the two inner walls, the bottom surface of the upper raised strip 22 is in close contact with the outer end surface of the corresponding spoke 121, and the top surface of the lower raised strip 23 is in close contact with the outer end surface of the elongated through groove 123 of the corresponding spoke 121. The screw portion of the bolt 2 is inserted into the front middle through hole 211, and the rear end of the screw portion of the bolt 2 is screwed on the inner wall of the screw hole 1, and the head of the bolt 2 is inserted into the annular groove formed on the inner wall of the front end of the front middle through hole 211, and the rear wall surface of the head of the bolt 2 is pressed against the rear end surface of the corresponding annular groove. This structure makes it difficult for the insert 20 to move or rotate when it is installed in the corresponding installation groove 124, ensuring that it is fixed and positioned firmly. The bolt 2 in the figure is a simple schematic diagram, and it can adopt various conventional bolts such as conventional hexagon socket bolts, cross bolts or flat bolts.

[0051] Furthermore, a middle protrusion 24 extending outward is formed in the middle of the top surface of the lower vertical inlaying portion 21 of the inlay 20, and side protrusions 25 extending outward are formed on the left and right parts of the top surface of the lower vertical inlaying portion 21, and the bottom surface of the side protrusion 25 is closely attached to or close to the outer end surface of the corresponding spoke 121;

[0052] The rear wall surfaces of the middle protrusion 24 and the edge protrusion 25 are close to or in close contact with the front wall surface of the rim 14 at the front.

[0053] The front wall surfaces of the spokes 121 at the left and right sides of the elongated through slot 123 are formed with protruding reinforcement portions 3 extending forward.

[0054] Furthermore, an aperture offset replacement annular plate 30 (which is cast from aluminum alloy and then processed by a lathe or other tool) is pressed against the rear wall surface of the hub 11, a main center through hole is formed in the middle of the aperture offset replacement annular plate 30, a sleeve portion 31 extending forward is formed at the inner side wall of the main center through hole, the sleeve portion 31 is inserted into the center through hole of the hub 11, the outer side wall of the sleeve portion 31 is tightly attached to the inner side wall of the center through hole of the hub 11, a plurality of connecting through holes 32 are formed on the edge of the aperture offset replacement annular plate 30, and the connecting through holes 32 are connected and correspond to the corresponding PCD holes 111 formed on the edge of the hub 11.

[0055] It can install an aperture offset replacement annular plate 30 with different center hole diameters and offsets in the wheel hub body 10, and the outer wall of its sleeve body 31 is close to the inner wall of the center through hole of the hub 11, thereby changing the center through hole diameter for installation of the hub 11 of the wheel hub body 10 (at this time, the diameter of the inner wall of the sleeve body 31 is the center through hole diameter φA for installation, and the original center through hole diameter of the hub 11 is φB), and the front wall surface of the aperture offset replacement annular plate 30 is pressed against the rear end surface of the hub 11, so that the distance between the rear end surface of the aperture offset replacement annular plate 30 and the vertical line of the middle of the rim 13 is the installation disk offset ET2 (the original distance between the rear wall surface of the hub 11 and the vertical line of the middle of the rim 13 is the installation disk offset ET1), which is different from the original one, so that it meets the dimensions of the center hole diameter and the installation disk offset of the wheel hub required by the corresponding vehicle model, so that it can be installed on the installation position of the corresponding vehicle model.

[0056] That is, the wheel hub body 10 of some vehicle models requires a 17-inch wheel hub, but the inner diameter of the central through hole of the hub portion 11 required is different. At the same time, the distance between the vertical line from the rear wall surface of the hub portion 11 to the middle of the rim 13 is also different. At this time, it is necessary to install an aperture offset replacement annular plate 30 of corresponding size, so as to change the inner diameter of the central through hole for installing the hub portion 11 of the wheel hub body 10 (the inner diameter at this time is the inner diameter φA of the sleeve portion 31), and the installation plate offset at this time is the distance between the rear end face of the aperture offset replacement annular plate 30 to the vertical line in the middle of the rim 13, and the offset is also changed to meet the installation needs of the corresponding vehicle model.

[0057] With this structure, the same wheel hub only needs to be installed with different sizes of aperture offset replacement annular pieces 30 to meet the requirements of installation in vehicles with different center hole diameters and offsets, thereby greatly improving the scope of application.

Claims

1. A processing technology for a wheel with full rim bright surface and multiple sizes of replaceable inserts, characterized by: The following steps are involved: (1) Smelting the aluminum alloy material to obtain aluminum liquid; (2) The aluminum liquid in step (1) is taken out of the furnace and degassed with high-purity nitrogen, and then transferred into a low-pressure casting machine holding furnace for holding at 680-700° C.; (3) Pressurizing the aluminum liquid in step (2) to enter the liquid riser and fill the wheel hub mold cavity, and then maintaining the pressure for 220-280 seconds; (4) Open the mold, take out the casting, and convey the casting into a heat treatment solution furnace through automatic rolling, heat it to 540±5℃, keep it at this temperature for 4.5h to 6h, immerse it in water within 25s, and control the water temperature at 80±5℃. Then, pass it through a heat treatment aging furnace, with an aging temperature of 160±5℃ and a holding time of 2.5h. After aging treatment, the automobile wheel hub casting is cooled to room temperature; (5) The casting cooled to room temperature is transported to a machining device for surface cutting so that its surface dimensions meet the design requirements. At the same time, the middle part of the front wall surface of the outer end of the spoke (121) is cut to form a mounting groove (124) extending backward. Then, the casting is transported to a coating room for coating of its front end surface. (6) placing the coated hub body (10) in a CNC lathe, clamping it, and then turning the front wall surface of the rim (14) at the front of the hub body to a full circle, so that the surface roughness reaches 0.8 μm to 1.0 μm; (7) transporting the hub body (10) of step (6) to a coating room, spraying transparent powder on the front wall of the wheel rim (14) at the front thereof, and spraying the rest of the unsprayed parts of the hub body (10); (8) Insert the installation groove (124) on the wheel hub body (10) in step (7) into the lower vertical embedding portion (21) of the installation insert (20) and fix it with bolts (2), so that the installation groove (124) matches the lower vertical embedding portion (21) of the insert (20); The hub body (10) comprises a hub portion (11), a spoke (12) and a rim (13); the spoke (12) comprises a plurality of spokes (121); the inner end of each spoke (121) is formed on the hub portion (11), and the outer end is formed on the rim (13) below the wheel rim (14) at the front; An extension portion (122) extending backward is formed on the rear wall surface at the outer end of the spoke (121), and the rear end of the extension portion (122) is formed on the front side wall of the rim (13) below the wheel flange (14) at the front; A long through groove (123) extending outward is formed in the middle of each spoke (121), a mounting groove (124) extending backward is formed in the middle of the front wall surface of the outer end of the spoke (121), the outer end of the mounting groove (124) extends out of the outer end surface of the spoke (121), and the inner end of the mounting groove (124) extends out of the outer end surface of the long through groove (123) of the spoke (121).

2. The processing technology of a full rim bright surface multi-size replaceable insert wheel according to claim 1 is characterized in that: In the steps (5) and (7), except for the front wall of the wheel rim (14) at the front where the front wall is turned, the rest of the wheel rim (14) is sprayed with black or other dark paint.

3. The processing technology of a wheel with full rim bright surface and multiple sizes of replaceable inserts according to claim 1 is characterized by: The insert (20) is injection molded, and its surface is sprayed with paint.

4. The processing technology of a wheel with full rim bright surface and multiple sizes of replaceable inserts according to claim 2 is characterized by: The outer end of the rear portion of the insert (20) is close to or in close contact with the front wall surface of the corresponding position of the wheel rim (14) at the front portion.

5. The processing technology of a wheel with full rim bright surface and multiple sizes of replaceable inserts according to claim 1 is characterized by: A screw hole (1) is formed in the middle of the front wall surface of the installation groove (124); the insert (20) includes a lower vertical inlaying portion (21); an upper protruding strip (22) is formed on the upper part of the rear wall surface of the lower vertical inlaying portion (21); a lower protruding strip (23) is formed on the lower part; a front middle through hole (211) is formed in the middle of the lower vertical inlaying portion (21); the front middle through hole (211) corresponds to the corresponding screw hole (1); the lower vertical inlaying portion (21) is nested in the installation groove (124); the rear wall surface of the lower vertical inlaying portion (21) is pressed against the rear wall surface of the installation groove (124); the left side of the lower vertical inlaying portion (21) is The right side walls are in close contact with the left and right inner side walls of the corresponding mounting groove (124), the bottom surface of the upper raised strip (22) is in close contact with the outer end surface of the corresponding spoke (121), the top surface of the lower raised strip (23) is in close contact with the outer end surface of the elongated through groove (123) of the corresponding spoke (121), the screw portion of the bolt (2) is inserted into the front middle through hole (211), the rear end of the screw portion of the bolt (2) is screwed on the inner side wall of the screw hole (1), the head of the bolt (2) is inserted into the annular groove formed on the inner side wall of the front end of the front middle through hole (211), and the rear wall surface of the head of the bolt (2) is pressed against the rear end surface of the corresponding annular groove.

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