A device and method for hot reverse mechanical correction and detection of aluminum alloy wheels for new energy vehicles

Abstract

The present invention provides a hot-state reverse mechanical correction and detection device and method for aluminum alloy wheels of new energy vehicles. The hot-state reverse mechanical correction and detection device of the present invention can synchronously and quickly realize the size detection and mechanical correction of aluminum alloy wheels after the low-pressure casting in a metal mold. At this time, the yield strength limit of the material of the aluminum alloy wheel is relatively low, that is, a smaller torque can be used to perform hot-state mechanical correction on the inner rim and outer rim areas of the aluminum alloy wheel, which has the characteristics of fast response speed and quick production effect. When the present invention uses the hot-state reverse mechanical correction rod to perform hot-state reverse mechanical correction on the aluminum alloy wheel, the inner rim laser rangefinder and the outer rim laser rangefinder are synchronously turned on, and a suitable torque is formed on the hot-state reverse mechanical correction rod to perform full-size hot-state reverse mechanical correction on the inner rim and outer rim areas of the aluminum alloy wheel.

Description

Technical Field

[0001] The present invention belongs to the manufacturing process and technical field of new energy vehicle structural parts, and particularly relates to a hot reverse mechanical correction and detection device and a correction and detection method for aluminum alloy wheels of new energy vehicles. Background Art

[0002] The wheel is assembled from parts such as a wheel hub, a tire, a valve stem or a pressure sensor, and a decorative cover, and is mainly composed of a wheel hub and a tire cooperating with each other. The wheel hub is the hardest supporting part of the wheel, is a component installed in cooperation with the axle, and supports the entire wheel component. It is the most critical and important part of the wheel assembly. As an assembly component, the wheel plays a very important role in the whole vehicle of the automobile. It not only realizes power conversion through transmission, but also bears the vehicle's own gravity and the safety of the whole vehicle's load during the driving of the whole vehicle. The wheel needs to bear a lot of acting forces, such as the combined interaction forces such as the huge torque generated during braking, the normal pressure of the vehicle body itself, the rotational torque during vehicle startup, and even the irregular forces generated in all directions such as impact and turning during the driving of the vehicle. As a key component of vehicle operation, the quality of the wheel directly affects the quality of the whole vehicle of the automobile. During high-speed driving, the smoothness, flexibility, impact resistance, and durability of the wheel operation will all affect the safety, stability, reliability, controllability, and comfort of vehicle driving, and even affect the service life and safety of the vehicle. Therefore, automobile manufacturers' requirements for the production stability and use safety of wheels are increasing day by day.

[0003] As the most popular wheel hub material in the current market, aluminum alloy wheels are known for their light weight characteristics, which can reduce the total weight of the vehicle, thereby improving the driving range and controllability of new energy vehicles. Moreover, the excellent thermal conductivity of aluminum alloy materials also helps the heat dissipation of the wheel hub, and the corrosion resistance has also been significantly improved compared with steel wheels. At present, aluminum alloy wheels are mainly produced by the metal mold low-pressure casting process. When producing aluminum alloy wheels by the metal mold low-pressure casting process, due to the different structural forms and wall thicknesses of the spoke area and the rim area of the aluminum alloy wheel, large solidification thermal stresses will be generated during the solidification process under the influence of the solidification temperature gradient, resulting in solidification deformation of the aluminum alloy wheel. The solidification thermal stresses accumulated during the solidification stage of the aluminum alloy wheel cannot be effectively released, and the quenching thermal stresses are superimposed during the solution quenching stage, which often leads to large deformations of the aluminum alloy wheel, directly affecting the dynamic balance performance of the aluminum alloy wheel, and thus affecting the controllability, stability, and safety of new energy vehicles. Summary of the Invention

[0004] The inventor of the present application has found through research that the commonly used correction process is to be carried out after the aluminum alloy wheel hub has completed the quality inspection. At this time, the yield strength limit of the aluminum alloy wheel hub has risen to more than 150MPa, and the correction is difficult; and when using conventional correction devices to calibrate the aluminum alloy wheel hub, it is difficult to take into account the full size of the aluminum alloy wheel hub. Often, after the size of some areas is corrected, the size of other areas has undergone a large deformation, and the correction and detection of the aluminum alloy wheel hub cannot be realized synchronously. In order to improve the deficiencies of the prior art, the present invention comprehensively considers the current aluminum alloy wheel hub metal mold low-pressure casting process and the synchronous correction and detection of the aluminum alloy wheel hub, and proposes a hot reverse mechanical correction and detection device and method for the aluminum alloy wheel hub of new energy vehicles. The hot reverse mechanical correction and detection device and method are characterized by simple operation, low manufacturing cost and short production cycle. The hot reverse mechanical correction and detection device and method are used to quickly detect the solidification deformation of the inner rim and the outer rim of the aluminum alloy wheel hub after the aluminum alloy wheel hub completes the low-pressure casting of the metal mold, and to perform hot reverse mechanical correction on the aluminum alloy wheel hub when the yield strength limit of the aluminum alloy wheel hub is low, which significantly improves the dimensional accuracy and surface finish of the aluminum alloy wheel hub, greatly improves and enhances the dynamic balancing performance of the aluminum alloy wheel hub, and obtains a dimensional tolerance of the aluminum alloy wheel hub ≤IT8 level and a surface finish of Ra ≤0.8μm, axial runout of the inner and outer sides of the aluminum alloy wheel hub ≤0.10mm, unbalanced mass ( Unbalance Mass ) ≤0.8g, dynamic balancing test amplitude ≤8μm, imbalance angle ≤5°, which greatly improves the handling, stability and safety of new energy vehicles.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A hot-state reverse mechanical correction and detection device for an aluminum alloy wheel hub of a new energy vehicle. The device includes a low-pressure metal mold casting unit, a mold cavity unit, a transmission unit, and a correction and detection unit. The correction and detection unit and the mold cavity unit are arranged above the low-pressure metal mold casting unit. The transmission unit is arranged on one side of the low-pressure metal mold casting unit. The mold cavity unit includes a left box mold, a rear box mold, a right box mold, a front box mold, a metal core, and a top box mold. The left box mold, the rear box mold, the right box mold, and the front box mold are located around the metal core. The top box mold is located directly above the metal core. The left box mold, the rear box mold, the right box mold, the front box mold, the metal core, and the top box mold form a casting cavity for the aluminum alloy wheel hub. The correction and detection unit includes a hot-state reverse mechanical correction rod, an inner rim laser rangefinder, an aluminum alloy wheel hub, and an outer rim laser rangefinder. The hot-state reverse mechanical correction rod is located at the center of the top box mold and is in limit fit with the top box mold. The inner rim laser rangefinder is located on one side of the top box mold and is in limit fit with the top box mold. The outer rim laser rangefinder is located on the other side of the top box mold and is in limit fit with the top box mold.

[0007] The beneficial effects of the present invention:

[0008] The present invention provides a hot-state reverse mechanical correction and detection device and method for an aluminum alloy wheel hub of a new energy vehicle. Compared with the existing correction process and detection method, the hot-state reverse mechanical correction and detection device of the present invention can synchronously and quickly realize the size detection and mechanical correction of the aluminum alloy wheel hub after the low-pressure metal mold casting of the aluminum alloy wheel hub. At this time, the yield strength limit of the material of the aluminum alloy wheel hub is relatively low, that is, a smaller torque can be used to perform hot-state mechanical correction on the inner rim and outer rim areas of the aluminum alloy wheel hub, which has the characteristics of fast response speed and fast production effect. At the same time, when using the hot-state reverse mechanical correction rod to perform hot-state reverse mechanical correction on the aluminum alloy wheel hub, the inner rim laser rangefinder and the outer rim laser rangefinder are synchronously turned on. By using the laser to measure the distance of the inner rim and outer rim of the aluminum alloy wheel hub and comparing it with the theoretically calculated value, the advance distance of the hot-state reverse mechanical correction rod can be inversely calculated. By combining the control of the driving motor of the regulating gear and the rotation speed of the transmission gear, a suitable torque is formed on the hot-state reverse mechanical correction rod to perform full-size hot-state reverse mechanical correction on the inner rim and outer rim areas of the aluminum alloy wheel hub.

[0009] Compared with the conventional calibration process for aluminum alloy wheels, the method described in the present invention can shorten the production cycle by more than 70%, reduce the manufacturing cost by more than 55%, improve the dimensional tolerance of aluminum alloy wheels by more than one grade, and significantly enhance the surface quality and dynamic balance performance of aluminum alloy wheels. The hot reverse mechanical calibration and detection device and method for aluminum alloy wheels of new energy vehicles described in the present invention can quickly achieve the dimensional detection and hot reverse mechanical calibration of aluminum alloy wheels, and has the characteristics of small equipment investment, low manufacturing cost, short production cycle, and strong process applicability. It can be used for the precision forming manufacturing of aluminum alloy wheels with complex curved surface structures in new energy vehicles in China, improve the dimensional accuracy, surface finish, and dynamic balance performance of aluminum alloy wheels, and significantly enhance the handling, stability, and safety of new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 FIG. is a schematic structural diagram of the hot reverse mechanical calibration and detection device according to a preferred embodiment of the present invention.

[0011] Figure 2 FIG. is a schematic structural diagram of the hot reverse mechanical calibration and detection device according to a preferred embodiment of the present invention.

[0012] Figure 3 FIG. is a schematic structural diagram of the hot reverse mechanical calibration and detection device according to a preferred embodiment of the present invention.

[0013] Figure 4 FIG. is a schematic structural diagram of the hot reverse mechanical calibration and detection device according to a preferred embodiment of the present invention.

[0014] Figure 5 FIG. is an isometric view of the hot reverse mechanical calibration and detection device according to a preferred embodiment of the present invention.

[0015] Figure 6 FIG. is an exploded view of the hot reverse mechanical calibration and detection device according to a preferred embodiment of the present invention.

[0016] Figure 7 FIG. is a sectional view of the hot reverse mechanical calibration and detection device according to a preferred embodiment of the present invention.

[0017] Figure 8 FIG. is a sectional view of the hot reverse mechanical calibration and detection device according to a preferred embodiment of the present invention.

[0018] Figure 9 FIG. is a schematic diagram of the working principle of the hot reverse mechanical calibration and detection device according to a preferred embodiment of the present invention.

[0019] Figure 10Schematic diagram of the working process of the inner rim and outer rim laser rangefinders according to a preferred embodiment of the present invention.

[0020] Figure 11 Schematic diagram of the working principle of hot-state reverse mechanical correction according to a preferred embodiment of the present invention.

[0021] Figure 12 Physical diagram of the aluminum alloy wheels for new energy vehicles prepared in Example 3.

[0022] Figure 13 Physical diagram of the aluminum alloy wheels for new energy vehicles prepared in Example 4.

[0023] Figure 14 Physical diagram of the aluminum alloy wheels for new energy vehicles prepared in Example 5.

[0024] Reference numerals: 1 is the bottom plate; 2 is the support rod of the gear drive motor; 3 is the gear drive motor; 4 is the speed rod of the gear drive motor; 5 is the gear; 6 is the support column of the bottom plate; 7 is the casting platform; 8 is the crucible slot coordination ring; 9 is the crucible; 10 is the riser pipe coordination ring; 11 is the transmission gear; 12 is the bearing of the transmission gear; 13 is the riser pipe; 14 is the left box mold displacer; 15 is the left box mold slide rail; 16 is the left box mold; 17 is the rear box mold displacer; 18 is the rear box mold slide rail; 19 is the rear box mold; 20 is the right box mold displacer; 21 is the right box mold slide rail; 22 is the right box mold; 23 is the front box mold displacer; 24 is the front box mold slide rail; 25 is the front box mold; 26 is the metal core; 27 is the top box mold; 28 is the hot-state reverse mechanical correction rod; 29 is the inner rim laser rangefinder; 30 is the outer rim laser rangefinder; 31 is the aluminum alloy wheel; 32 is the support rod; 33 is the support rod adjuster; 34 is the support rod connecting frame; 35 is the connecting rod of the hot-state reverse mechanical correction rod; 36 is the adjuster of the connecting rod of the hot-state reverse mechanical correction rod; 37 is the fastening nut of the limit post of the support rod connecting frame; 38 is the limit post of the support rod connecting frame; 39 is the limiter of the connecting rod of the inner rim laser rangefinder; 40 is the connecting rod of the inner rim laser rangefinder; 41 is the adjuster of the connecting rod of the inner rim laser rangefinder of the inner wheel rim; 42 is the limiter of the connecting rod of the outer rim laser rangefinder; 43 is the connecting rod of the outer rim laser rangefinder; 44 is the adjuster of the connecting rod of the outer rim laser rangefinder. Detailed implementation manners

[0025] <Device for Hot-State Reverse Mechanical Correction and Detection of Aluminum Alloy Wheels for New Energy Vehicles>

[0026] As described above, the present invention provides a hot-state reverse mechanical correction and detection device for aluminum alloy wheels of new energy vehicles. The hot-state reverse mechanical correction and detection device includes a metal mold low-pressure casting unit, a mold cavity unit, a transmission unit, and a correction and detection unit. The correction and detection unit and the mold cavity unit are arranged above the metal mold low-pressure casting unit. The transmission unit is arranged on one side of the metal mold low-pressure casting unit.

[0027] The mold cavity unit includes a left box mold 16, a rear box mold 19, a right box mold 22, a front box mold 25, a metal core 26, and a top box mold 27. The left box mold 16, the rear box mold 19, the right box mold 22, and the front box mold 25 are located around the metal core 26. The top box mold 27 is located directly above the metal core 26. The left box mold 16, the rear box mold 19, the right box mold 22, the front box mold 25, the metal core 26, and the top box mold 27 form a casting cavity for the aluminum alloy wheel 31.

[0028] The correction and detection unit includes a hot-state reverse mechanical correction rotating rod 28, an inner rim laser rangefinder 29, an aluminum alloy wheel 31, and an outer rim laser rangefinder 30.

[0029] The hot-state reverse mechanical correction rotating rod 28 is located at the center of the top box mold 27 and is in limit fit with the top box mold 27. The inner rim laser rangefinder 29 is located on one side of the top box mold 27 and is in limit fit with the top box mold 27. The outer rim laser rangefinder 30 is located on the other side of the top box mold 27 and is in limit fit with the top box mold 27.

[0030] <Transmission unit>

[0031] According to an embodiment of the present invention, the transmission unit is arranged on one side of the metal mold low-pressure casting unit. The transmission unit is used to drive the aluminum alloy wheel 31 to rotate, so as to realize the hot-state reverse mechanical correction and detection of the aluminum alloy wheel.

[0032] According to an embodiment of the present invention, the transmission unit includes a gear drive motor support rod 2, a gear drive motor 3, a gear drive motor speed rod 4, and a gear 5. The gear drive motor support rod 2 and the gear drive motor speed rod 4 are connected by the gear drive motor 3. The gear drive motor speed rod 4 is connected to the gear 5.

[0033] According to an embodiment of the present invention, the gear 5 is connected to the metal mold low-pressure casting unit. Preferably, the gear 5 is in tooth engagement with the transmission gear 11 in the metal mold low-pressure casting unit.

[0034] According to an embodiment of the present invention, the gear-driven motor 3 drives the gear 5 to rotate through the gear-driven motor speed rod 4, and the gear 5 drives the transmission gear 11 in the metal mold low-pressure casting unit to rotate, and the transmission gear 11 drives the aluminum alloy wheel hub 31 to rotate.

[0035] According to an embodiment of the present invention, the centers of the gear-driven motor support rod 2, the gear-driven motor 3, the gear-driven motor speed rod 4, and the gear 5 are collinear.

[0036] According to an embodiment of the present invention, the material of the gear-driven motor support rod 2 is stainless steel, the diameter ≥ 20 mm, and the height ≥ 300 mm.

[0037] According to an embodiment of the present invention, the working mode of the gear-driven motor 3 is stepping, the step angle is 1.2° - 1.5°, the torque is 2000 N·m - 4000 N·m, and the moment of inertia is 800 Kg·m 2 -2400 Kg·m 2 , and the rated power is 450 kW - 800 kW.

[0038] According to an embodiment of the present invention, the material of the gear-driven motor speed rod 4 is alloy steel, and the speed is 1200 r·min -1 -2000 r·min -1 .

[0039] According to an embodiment of the present invention, the material of the gear 5 is carburized steel. The module of the gear 5 is 25 - 40, the number of teeth is 24 - 32, the pressure angle is 18° - 22°, and the tooth width is 0.2 - 0.4.

[0040] <Metal mold low-pressure casting unit>

[0041] According to an embodiment of the present invention, the metal mold low-pressure casting unit is used to supply alloy liquid to the mold cavity unit to complete the metal mold low-pressure casting of the aluminum alloy wheel hub 31.

[0042] According to an embodiment of the present invention, the metal mold low-pressure casting unit includes a casting platform 7, a crucible slot coordination ring 8, a crucible 9, a riser pipe coordination ring 10, a transmission gear 11, a transmission gear bearing 12, and a riser pipe 13; the crucible slot coordination ring 8 is in limit fit with the central circular hole of the casting platform 7; the crucible 9 is in limit fit with the crucible slot coordination ring 8; the transmission gear 11 is located directly above the crucible 9; the riser pipe coordination ring 10 is located below the transmission gear 11 and is connected to the transmission gear 11; the transmission gear bearing 12 is located at the center of the transmission gear 11 and is in limit fit through the riser pipe coordination ring 10; the riser pipe 13 passes through the transmission gear bearing 12 and the riser pipe coordination ring 10 and is positioned through the riser pipe coordination ring 10.

[0043] According to an embodiment of the present invention, the transmission gear 11 is in tooth engagement with the gear 5 in the transmission unit.

[0044] According to an embodiment of the present invention, the bottom end of the riser pipe 13 is located inside the crucible 9, and the top end of the riser pipe 13 is located above the transmission gear 11. Exemplarily, the distance between the bottom end of the riser pipe 13 and the bottom of the crucible 9 is 200 mm - 240 mm.

[0045] According to an embodiment of the present invention, the centers of the riser pipe 13, the transmission gear bearing 12, the transmission gear 11, the riser pipe coordination ring 10, and the crucible 9 are collinear.

[0046] According to an embodiment of the present invention, the limit fit between the crucible slot coordination ring 8 and the central circular hole of the casting platform 7 means that the central circular hole of the casting platform 7 restricts the position of the crucible slot coordination ring 8 to prevent the crucible slot coordination ring 8 from exceeding the limit area; the limit fit method is clearance fit, and the clearance amount is 0.5 mm - 1.0 mm.

[0047] According to an embodiment of the present invention, the limit fit between the crucible 9 and the crucible slot coordination ring 8 means that the crucible slot coordination ring 8 restricts the position of the crucible 9 to prevent the crucible 9 from exceeding the limit area; the limit fit method is clearance fit, and the clearance amount is 0.5 mm - 1.0 mm.

[0048] According to an embodiment of the present invention, the limit fit of the transmission gear bearing 12 through the riser pipe coordination ring 10 means that the riser pipe coordination ring 10 restricts the position of the transmission gear bearing 12 to prevent the transmission gear bearing 12 from exceeding the limit area; the limit fit method is clearance fit, and the clearance amount is 0.5 mm - 1.0 mm.

[0049] According to an embodiment of the present invention, the top surface of the crucible 9 is coplanar with the horizontal plane of the casting platform 7.

[0050] According to an embodiment of the present invention, the lift pipe coordination ring 10 and the transmission gear 11 are connected by nuts.

[0051] According to an embodiment of the present invention, the material of the casting platform 7 is low-carbon steel; the length of the casting platform 7 is ≥ 1800 mm, the width is ≥ 1500 mm, and the thickness is ≥ 30 mm.

[0052] According to an embodiment of the present invention, one card slot is distributed on each side of the casting platform 7 in the length direction, preferably a "U"-shaped card slot; one card slot is distributed on each side of the casting platform 7 in the width direction, preferably a "U"-shaped card slot.

[0053] According to an embodiment of the present invention, the width of the "U"-shaped card slot is ≥ 50 mm, the depth of the "U"-shaped card slot is ≥ 40 mm, and the length of the "U"-shaped card slot is 40 - 80 mm.

[0054] According to an embodiment of the present invention, the material of the crucible card slot coordination ring 8 is low-carbon steel; the shape of the crucible card slot coordination ring 8 is annular.

[0055] According to an embodiment of the present invention, the material of the crucible 9 is graphite or stainless steel, and the volume is 500 L - 750 L.

[0056] According to an embodiment of the present invention, the material of the lift pipe coordination ring 10 is stainless steel.

[0057] According to an embodiment of the present invention, the material of the transmission gear 11 is carburized steel. The module of the transmission gear 11 is 75 - 100, the number of teeth is 80 - 120, the pressure angle is 20° - 25°, and the tooth width is 0.3 - 0.5.

[0058] According to an embodiment of the present invention, the material of the transmission gear bearing 12 is high-carbon chromium steel.

[0059] According to an embodiment of the present invention, the inner diameter of the transmission gear bearing 12 is 120 mm - 140 mm, the outer diameter is 180 mm - 200 mm, the width is 20 mm - 24 mm, the dynamic load is 4000 N - 4500 N, the static load is 1200 N - 1500 N, and the limit speed is 6000 r·min -1 -6500 r·min -1 。

[0060] According to an embodiment of the present invention, the metal mold low-pressure casting unit further includes a bottom plate 1 and a bottom plate support column 6; the bottom plate 1 is located below the casting platform 7, and the bottom plate 1 is connected to the casting platform 7 through the bottom plate support column 6.

[0061] According to an embodiment of the present invention, the bottom plate 1 is located below the casting platform 7, and the top surface of the bottom plate 1 is connected to the bottom surface of the casting platform 7 through the bottom plate support columns 6.

[0062] According to an embodiment of the present invention, the bottom plate support columns 6 and the bottom plate 1 are connected by nuts.

[0063] According to an embodiment of the present invention, the material of the bottom plate 1 is carbon steel, with a length ≥ 2000 mm, a width ≥ 1600 mm, and a thickness ≥ 40 mm.

[0064] According to an embodiment of the present invention, the material of the bottom plate support columns 6 is alloy steel, and the number is 4; the cross-section of the bottom plate support columns 6 is square, such as a square with a side length ≥ 60 mm; the height of the bottom plate support columns 6 ≥ 800 mm; the bottom plate support columns 6 are symmetrically distributed along the length direction of the bottom plate 1. For example, when the number of the bottom plate support columns 6 is 4, they are distributed at the four corners of the bottom plate 1 and are symmetrically distributed along the length direction of the bottom plate 1.

[0065] <Mold cavity unit>

[0066] According to an embodiment of the present invention, the mold cavity unit is arranged above the low-pressure die casting unit for metals, and the low-pressure die casting unit for metals and the mold cavity unit jointly complete the low-pressure die casting of the aluminum alloy wheel hub 31.

[0067] According to an embodiment of the present invention, the left box mold 16, the right box mold 22, the rear box mold 19, and the front box mold 25 are distributed circumferentially along the metal core 26 and jointly form the casting cavity of the aluminum alloy wheel hub 31 with the top box mold 27.

[0068] According to an embodiment of the present invention, both sides of the left box mold 16 are in contact with the rear box mold 19 and the front box mold 25 respectively, both sides of the rear box mold 19 are in contact with the left box mold 16 and the right box mold 22 respectively, both sides of the right box mold 22 are in contact with the rear box mold 19 and the front box mold 25 respectively, and both sides of the front box mold 25 are in contact with the left box mold 16 and the right box mold 22 respectively.

[0069] According to an embodiment of the present invention, the left box mold 16 is located on the left side of the metal core 26, the right box mold 22 is located on the right side of the metal core 26, the rear box mold 19 is located on the rear side of the metal core 26, the front box mold 25 is located on the front side of the metal core 26, and the left box mold 16, the right box mold 22, the rear box mold 19, the front box mold 25, the metal core 26, and the top box mold 27 jointly form the casting cavity of the aluminum alloy wheel hub 31.

[0070] According to an embodiment of the present invention, the left box mold 16 is located on the left side of the casting cavity of the aluminum alloy wheel hub 31, the right box mold 22 is located on the right side of the casting cavity of the aluminum alloy wheel hub 31, the rear box mold 19 is located on the rear side of the casting cavity of the aluminum alloy wheel hub 31, the front box mold 25 is located on the front side of the casting cavity of the aluminum alloy wheel hub 31, and the metal core 26 is located inside the casting cavity of the aluminum alloy wheel hub 31.

[0071] According to an embodiment of the present invention, the metal core 26 is located directly above the transmission gear 11 of the low-pressure metal casting unit, and the centers of the metal core 26 and the transmission gear 11 are collinear.

[0072] According to an embodiment of the present invention, the material of the metal core 26 is hot work die steel.

[0073] According to an embodiment of the present invention, the material of the top box mold 27 is hot work die steel. The shape of the top box mold 27 is cylindrical. The thickness of the top box mold 27 is ≥40 mm, and the diameter is ≥400 mm.

[0074] According to an embodiment of the present invention, the left box mold 16, the right box mold 22, the rear box mold 19, and the front box mold 25 are located on the casting platform 7 of the low-pressure metal casting unit.

[0075] According to an embodiment of the present invention, the mold cavity unit further includes a left box mold displacer 14, a left box mold slide rail 15, a rear box mold displacer 17, a rear box mold slide rail 18, a right box mold displacer 20, a right box mold slide rail 21, a front box mold displacer 23, and a front box mold slide rail 24;

[0076] The left box mold displacer 14 is connected to the left box mold 16 through the left box mold slide rail 15, the right box mold displacer 20 is connected to the right box mold 22 through the right box mold slide rail 21, the rear box mold displacer 17 is connected to the rear box mold 19 through the rear box mold slide rail 18, and the front box mold displacer 23 is connected to the front box mold 25 through the front box mold slide rail 24.

[0077] According to an embodiment of the present invention, the rear box mold displacer 17 is connected to the rear box mold slide rail 18 through a nut, the front box mold displacer 23 is connected to the front box mold slide rail 24 through a nut, the right box mold displacer 20 is connected to the right box mold slide rail 21 through a nut, and the left box mold displacer 14 is connected to the left box mold slide rail 15 through a nut.

[0078] According to an embodiment of the present invention, the left mold displacer 14 of the mold can drive the left mold 16 of the mold to move inwards or outwards along the center direction of the metal core 26 through the left mold slide rail 15. The distance that the left mold displacer 14 can move is 40 mm - 80 mm, that is, the distance that the left mold displacer 14 slides in the card slot on the casting platform 7 is 40 mm - 80 mm.

[0079] According to an embodiment of the present invention, the right mold displacer 20 of the mold can drive the right mold 22 of the mold to move inwards or outwards along the center direction of the metal core 26 through the right mold slide rail 21. The distance that the right mold displacer 20 can move is 40 mm - 80 mm, that is, the distance that the right mold displacer 20 slides in the card slot on the casting platform 7 is 40 mm - 80 mm.

[0080] According to an embodiment of the present invention, the front mold displacer 23 of the mold can drive the front mold 25 of the mold to move inwards or outwards along the center direction of the metal core 26 through the front mold slide rail 24. The distance that the front mold displacer 23 can move is 40 mm - 80 mm, that is, the distance that the front mold displacer 23 slides in the card slot on the casting platform 7 is 40 mm - 80 mm.

[0081] According to an embodiment of the present invention, the rear mold displacer 17 of the mold can drive the rear mold 19 of the mold to move inwards or outwards along the center direction of the metal core 26 through the rear mold slide rail 18. The distance that the rear mold displacer 17 can move is 40 mm - 80 mm, that is, the distance that the rear mold displacer 17 slides in the card slot on the casting platform 7 is 40 mm - 80 mm.

[0082] According to an embodiment of the present invention, the rear mold displacer 17, the front mold displacer 23, the right mold displacer 20 and the left mold displacer 14 are located on the casting platform 7 of the low-pressure die casting unit of the metal mold.

[0083] According to an embodiment of the present invention, the left mold displacer 14 is located in the card slot on the left side in the width direction of the casting platform 7 of the low-pressure die casting unit of the metal mold, and is in clearance fit with the card slot, and the clearance is 0.4 mm - 1.2 mm, and the lubricant is a solid lubricant; the left mold slide rail 15 is a telescopic slide rail; the distance that the left mold slide rail 15 can telescopically move along the length direction of the casting platform 7 is 60 mm - 320 mm; the number of the left mold slide rails 15 is 2, the material is low-carbon steel, and the length is 320 mm - 500 mm; the material of the left mold 16 is hot work die steel, and the thickness of the left mold 16 ≥ 20 mm.

[0084] According to an embodiment of the present invention, the right box mold displacer 20 is located in the card slot on the right side in the width direction of the casting platform 7 of the low-pressure die casting unit of the metal mold, and is in clearance fit with the card slot, with a clearance of 0.4 mm - 1.2 mm. The lubricant is a solid lubricant; the right box mold slide rail 21 is a telescopic slide rail; the distance that the right box mold slide rail 21 can telescopically move along the length direction of the casting platform 7 is 60 mm - 320 mm; the number of the right box mold slide rails 21 is 2, the material is low-carbon steel, and the length is 320 mm - 500 mm; the material of the right box mold 22 is hot work die steel, and the thickness of the right box mold 22 ≥ 20 mm.

[0085] According to an embodiment of the present invention, the rear box mold displacer 17 is located in the card slot on the rear side in the length direction of the casting platform 7 of the low-pressure die casting unit of the metal mold, and is in clearance fit with the card slot, with a clearance of 0.3 mm - 0.9 mm. The lubricant is a solid lubricant; the rear box mold slide rail 18 is a telescopic slide rail; the distance that the rear box mold slide rail 18 can telescopically move along the width direction of the casting platform 7 is 60 mm - 320 mm; the number of the rear box mold slide rails 18 is 2, the material is low-carbon steel, and the length is 350 mm - 450 mm; the material of the rear box mold 19 is hot work die steel, and the thickness of the rear box mold 19 ≥ 25 mm.

[0086] According to an embodiment of the present invention, the front box mold displacer 23 is located in the card slot on the front side in the length direction of the casting platform 7 of the low-pressure die casting unit of the metal mold, and is in clearance fit with the card slot, with a clearance of 0.3 mm - 0.9 mm. The lubricant is a solid lubricant; the front box mold slide rail 24 is a telescopic slide rail; the distance that the front box mold slide rail 24 can telescopically move along the width direction of the casting platform 7 is 60 mm - 320 mm; the number of the front box mold slide rails 24 is 2, the material is low-carbon steel, and the length is 350 mm - 450 mm; the material of the front box mold 25 is hot work die steel, and the thickness of the front box mold 25 ≥ 25 mm.

[0087] According to an embodiment of the present invention, the solid lubricant comprises the following components in mass fractions: graphite powder 32% - 34% (mass fraction, the same below), with a particle size of 25 μm - 60 μm; polytetrafluoroethylene PTFE powder 25% - 27%, with a particle size of 1.5 μm - 4.5 μm; mullite powder 22% - 24%, with a particle size of 80 mesh - 120 mesh; epoxy resin powder 8% - 10%, with a particle size of 15 μm - 45 μm; the balance is ethanol, with a chemical purity ≥ 95%.

[0088] <Calibration and Detection Unit>

[0089] According to an embodiment of the present invention, the correction and detection unit is arranged above the low-pressure die casting unit for metal molds, and the correction and detection unit is used for the correction and detection of the aluminum alloy wheel hub 31.

[0090] According to an embodiment of the present invention, the hot reverse mechanical correction rod 28 is located at the center of the top box mold 27 and is in a limiting fit with the top box mold 27, which means that the position of the hot reverse mechanical correction rod 28 is restricted by the top box mold 27 to prevent the hot reverse mechanical correction rod 28 from exceeding the limited area; the limiting fit method is clearance fit, and the fit clearance is 0.6 mm - 1.2 mm.

[0091] According to an embodiment of the present invention, the top end of the hot reverse mechanical correction rod 28 is located inside the top box mold 27 and is in a limiting fit with the top box mold 27; the limiting fit method is clearance fit, and the fit clearance is 0.6 mm - 1.2 mm; the bottom end of the hot reverse mechanical correction rod 28 is located below the top box mold 27.

[0092] According to an embodiment of the present invention, the correction and detection unit further includes a hot reverse mechanical correction rod connecting rod 35 and a hot reverse mechanical correction rod connecting rod adjuster 36; the top end of the hot reverse mechanical correction rod 28 is connected to the hot reverse mechanical correction rod connecting rod adjuster 36 through the hot reverse mechanical correction rod connecting rod 35.

[0093] According to an embodiment of the present invention, the centers of the hot reverse mechanical correction rod connecting rod 35 and the hot reverse mechanical correction rod connecting rod adjuster 36 are collinear.

[0094] According to an embodiment of the present invention, the material of the hot reverse mechanical correction rod connecting rod 35 is carburized steel. The diameter of the hot reverse mechanical correction rod connecting rod 35 is ≥ 40 mm.

[0095] According to an embodiment of the present invention, the hot reverse mechanical correction rod connecting rod adjuster 36 is used to adjust the distance between the hot reverse mechanical correction rod 28 and the top box mold 27.

[0096] According to an embodiment of the present invention, the material of the hot reverse mechanical correction rod 28 is high-strength alloy steel.

[0097] According to an embodiment of the present invention, the shape of the hot reverse mechanical correction rod 28 is "L" shaped. The short side of the "L" shape is connected to the bottom end of the hot reverse mechanical correction rod connecting rod 35, and the long side of the "L" shape is a correction side with a correction end. The length of the long side of the "L" shape is greater than the outer diameter of the aluminum alloy wheel hub 31.

[0098] According to an embodiment of the present invention, the shape of the correction end is "concave" shaped, and the end of the "concave" shape is hemispherical with a radius of 5 mm - 10 mm. The width of the groove of the "concave" shape is greater than the thickness of the rim of the aluminum alloy wheel hub 31.

[0099] According to an embodiment of the present invention, the hot reverse mechanical correction rod 28 is used to apply a moment to the aluminum alloy wheel hub 31 in the inward or outward direction along the center of the circle, so as to realize the hot reverse mechanical correction of the aluminum alloy wheel hub 31.

[0100] According to an embodiment of the present invention, the inner rim laser rangefinder 29 is located on one side of the top box mold 27 and is in limit fit with the top box mold 27, which means that the top box mold 27 restricts the position of the inner rim laser rangefinder 29 to prevent the inner rim laser rangefinder 29 from exceeding the limit area; the limit fit method is clearance fit, and the fit clearance is 0.8 mm - 1.2 mm.

[0101] According to an embodiment of the present invention, the top end of the inner rim laser rangefinder 29 is located inside the top box mold 27 and is in limit fit with the top box mold 27; the limit fit method is clearance fit, and the fit clearance is 0.8 mm - 1.2 mm; the bottom end of the inner rim laser rangefinder 29 is located below the top box mold 27.

[0102] According to an embodiment of the present invention, the inner rim laser rangefinder 29 is used to measure the distance of the inner rim of the aluminum alloy wheel hub 31.

[0103] According to an embodiment of the present invention, the correction and detection unit further includes an inner rim laser rangefinder connecting rod limiter 39, an inner rim laser rangefinder connecting rod 40, and an inner rim laser rangefinder connecting rod adjuster 41;

[0104] The top end of the inner rim laser rangefinder 29 is connected to the bottom end of the inner rim laser rangefinder connecting rod 40, and the top end of the inner rim laser rangefinder connecting rod 40 is connected to the inner rim laser rangefinder connecting rod adjuster 41 through the inner rim laser rangefinder connecting rod limiter 39.

[0105] According to an embodiment of the present invention, the centers of the inner rim laser rangefinder connecting rod limiter 39, the inner rim laser rangefinder connecting rod 40, and the inner rim laser rangefinder connecting rod adjuster 41 are collinear.

[0106] According to an embodiment of the present invention, the shape of the inner rim laser rangefinder connecting rod limiter 39 is "inverted U" shaped.

[0107] According to an embodiment of the present invention, the material of the inner rim laser rangefinder connecting rod limiter 39 is carbon steel.

[0108] According to an embodiment of the present invention, the inner rim laser rangefinder connecting rod positioner 41 is located directly above the inner rim laser rangefinder connecting rod 40, and is used to adjust the distance between the inner rim laser rangefinder 29 and the top box mold 27 or the distance between the inner rim laser rangefinder 29 and the aluminum alloy wheel hub 31, such as the distance between the inner rim laser rangefinder 29 and the inner hub of the aluminum alloy wheel hub 31.

[0109] According to the embodiment of the present invention, the resolution of the inner wheel rim laser rangefinder 29 is 0.5mm-1.0mm, the measuring distance is 1m-500m, the measuring accuracy is ±1.0mm~±0.5mm, the laser is visible red light, the wavelength of visible red light is 615nm-680nm, the safety level is Class 3R, the environmental protection level is IP 67, and the data storage frequency is 0.02s-0.1s. The measuring distance refers to the sum of the distances that the inner wheel rim laser rangefinder 29 can measure; illustratively, when the aluminum alloy wheel hub rotates, the measuring distance through the inner wheel rim laser rangefinder 29 is N times the circumference of the inner wheel rim of the aluminum alloy wheel hub, and N is the number of revolutions of the aluminum alloy wheel hub.

[0110] According to the implementation scheme of the present invention, the outer wheel rim laser rangefinder 30 is located on one side of the top box mold 27 and is limitedly matched with the top box mold 27, which means that the top box mold 27 limits the position of the inner wheel rim laser rangefinder 29 to prevent the outer wheel rim laser rangefinder 30 from exceeding the limit area; the limit matching method is clearance matching, and the matching clearance amount is 0.8mm-1.2mm.

[0111] According to an embodiment of the present invention, the top end of the outer rim laser rangefinder 30 is located inside the top box mold 27 and is limitedly matched with the top box mold 27; the limited matching method is clearance matching, and the matching clearance amount is 0.8mm-1.2mm; the bottom end of the outer rim laser rangefinder 30 is located below the top box mold 27.

[0112] According to the embodiment of the present invention, the outer rim laser distance meter 30 is used to measure the distance of the outer rim of the aluminum alloy wheel hub 31 .

[0113] According to an embodiment of the present invention, the calibration and detection unit further comprises an outer wheel rim laser rangefinder connecting rod stopper 42, an outer wheel rim laser rangefinder connecting rod 43 and an outer wheel rim laser rangefinder connecting rod positioner 44;

[0114] The top end of the outer wheel rim laser rangefinder 30 is connected to the bottom end of the outer wheel rim laser rangefinder connecting rod 43 , and the top end of the outer wheel rim laser rangefinder connecting rod 43 is connected to the outer wheel rim laser rangefinder connecting rod positioner 44 through the outer wheel rim laser rangefinder connecting rod stopper 42 .

[0115] According to an embodiment of the present invention, the centers of the outer rim laser rangefinder connecting rod limiter 42, the outer rim laser rangefinder connecting rod 43, and the outer rim laser rangefinder connecting rod position adjuster 44 are collinear.

[0116] According to an embodiment of the present invention, the outer rim laser rangefinder connecting rod limiter 42 is in the shape of an inverted "U".

[0117] According to an embodiment of the present invention, the outer rim laser rangefinder connecting rod limiter 42 is made of carbon steel.

[0118] According to an embodiment of the present invention, the outer rim laser rangefinder connecting rod position adjuster 44 is located directly above the outer rim laser rangefinder connecting rod 43 and is used to adjust the distance between the outer rim laser rangefinder 30 and the bottom end of the top box mold 27 or the distance between the outer rim laser rangefinder 30 and the aluminum alloy wheel hub 31, such as the distance between the outer rim laser rangefinder 30 and the outer rim of the aluminum alloy wheel hub 31.

[0119] According to an embodiment of the present invention, the outer rim laser rangefinder 30 has a resolution of 0.5 mm - 1.0 mm, a measurement distance of 1 m - 500 m, a measurement accuracy of ±1.0 mm to ±0.5 mm, the laser is visible red light, the wavelength of the visible red light is 615 nm - 680 nm, the safety level is Class 3R, the environmental protection level is IP 67, and the data storage frequency is 0.02 s - 0.1 s. The measurement distance refers to the total distance that the outer rim laser rangefinder 30 can measure; for example, when the aluminum alloy wheel hub rotates, the measurement distance by the outer rim laser rangefinder 30 is N times the circumference of the outer rim of the aluminum alloy wheel hub, where N is the number of rotations of the aluminum alloy wheel hub.

[0120] According to an embodiment of the present invention, the hot state reverse mechanical correction and detection unit further includes a support rod 32, a support rod position adjuster 33, and a support rod connecting frame 34; the support rod connecting frame 34 is located between the hot state reverse mechanical correction rotating rod connecting rod 35 and the hot state reverse mechanical correction rotating rod connecting rod position adjuster 36; the bottom of the support rod 32 is connected to the casting platform 7 in the metal mold low-pressure casting unit, and the top of the support rod 32 is connected to the support rod connecting frame 34; the support rod position adjuster 33 is provided on the support rod 32.

[0121] According to an embodiment of the present invention, the centers of the support rod connecting frame 34, the hot state reverse mechanical correction rotating rod connecting rod 35, and the hot state reverse mechanical correction rotating rod connecting rod position adjuster 36 are collinear.

[0122] According to an embodiment of the present invention, the support rod connecting frame 34 is located directly above the hot-state reverse mechanical correction screw rod connecting rod 35, the hot-state reverse mechanical correction screw rod connecting rod adjuster 36 is located directly above the support rod connecting frame 34, and the lower end of the support rod connecting frame 34 is connected to the hot-state reverse mechanical correction screw rod connecting rod 35, and the upper end of the support rod connecting frame 34 is connected to the hot-state reverse mechanical correction screw rod connecting rod adjuster 36.

[0123] According to an embodiment of the present invention, the bottom of the support rod 32 is connected to the top surface of the casting platform 7. The support rod 32 and the support rod connecting frame 34 are connected by nuts.

[0124] According to an embodiment of the present invention, the number of the support rods 32 is 4, symmetrically distributed along the length direction of the casting platform 7. For example, the support rods 32 are distributed at the four corners of the casting platform 7, and the support rods 32 are symmetrically distributed along the length direction of the casting platform 7. The material of the support rod 32 is alloy steel. The cross-section of the support rod 32 is square, such as a square with a side length ≥ 80 mm; the height of the support rod 32 ≥ 1000 mm.

[0125] According to an embodiment of the present invention, the shape of the support rod connecting frame 34 is "X" shaped. The material of the support rod connecting frame 34 is carbon steel. The thickness of the support rod connecting frame 34 ≥ 50 mm.

[0126] According to an embodiment of the present invention, the support rod adjuster 33 is arranged at the middle position of the support rod 32 along the height direction. The number of the support rod adjusters 33 is 4.

[0127] According to an embodiment of the present invention, the support rod adjuster 33 is used to adjust the position of the top box mold 27, for example, to adjust the distance between the top box mold 27 and the casting platform 7 or to adjust the distance between the top box mold 27 and the metal core 26.

[0128] According to an embodiment of the present invention, the correction and detection unit further includes a support rod connecting frame limit post fastening nut 37 and a support rod connecting frame limit post 38; the bottom end of the support rod connecting frame limit post 38 is connected to the top box mold 27 in the mold cavity unit through the support rod connecting frame limit post fastening nut 37; the top end of the support rod connecting frame limit post 38 is connected to the support rod connecting frame 34.

[0129] According to an embodiment of the present invention, the material of the support rod connecting frame limit post fastening nut 37 is threaded steel.

[0130] According to an embodiment of the present invention, the support rod connection frame limit column 38 is made of carbon steel. The number of the support rod connection frame limit column 38 is 4. The diameter of the support rod connection frame limit column 38 is ≥35mm, and the height is ≥300mm. The support rod connection frame limit column 38 is located at the midpoint of each beam of the "X"-shaped support rod connection frame 34.

[0131] According to an embodiment of the present invention, the support rod connecting frame limiting column 38 is used to provide structural support to the support rod connecting frame 34 on the top box mold 27.

[0132] <Hot reverse mechanical correction and detection method for aluminum alloy wheels for new energy vehicles>

[0133] The present invention also provides a method for hot reverse mechanical correction and detection of aluminum alloy wheel hubs for new energy vehicles. The method is based on the above-mentioned hot reverse mechanical correction and detection device for aluminum alloy wheel hubs for new energy vehicles. The method comprises the following steps:

[0134] (i) injecting aluminum alloy melt into a casting cavity of an aluminum alloy wheel hub 31 composed of a left box mold 16, a right box mold 22, a front box mold 25, a rear box mold 19, a metal core 26 and a top box mold 27 to prepare an aluminum alloy wheel hub 31;

[0135] (ii) After the low-pressure casting of the aluminum alloy wheel hub 31 is completed, the left box mold 16, the right box mold 22, the front box mold 25 and the rear box mold 19 are pushed outward along the center direction of the metal mold core 26; and the top box mold 27 is pushed upward along the vertical direction;

[0136] (iii) adjusting the inner wheel rim laser distance meter 29 to the edge position of the inner wheel rim of the aluminum alloy wheel hub 31, and adjusting the outer wheel rim laser distance meter 30 to the edge position of the outer wheel rim of the aluminum alloy wheel hub 31;

[0137] Turn on the transmission unit to drive the aluminum alloy wheel hub 31 to rotate;

[0138] The inner wheel rim laser rangefinder 29 is turned on to perform laser distance measurement on the inner wheel rim of the aluminum alloy wheel hub 31, and the outer wheel rim laser rangefinder 30 is turned on to perform laser distance measurement on the outer wheel rim of the aluminum alloy wheel hub 31. According to the laser distance measurement result, the hot reverse mechanical correction rod 28 is used to apply an inward or outward torque along the center direction to the rotating aluminum alloy wheel hub 31, so as to realize hot reverse mechanical correction and detection of the aluminum alloy wheel hub 31.

[0139] According to an embodiment of the present invention, in step (i), the preheating temperatures of the left box mold 16, the right box mold 22, the front box mold 25, and the rear box mold 19 are 280°C - 320°C respectively; the preheating temperatures of the metal core 26 and the top box mold 27 are 200°C - 240°C respectively.

[0140] According to an embodiment of the present invention, in step (i), the low-pressure casting temperature of the aluminum alloy melt is 685°C - 715°C, the lifting pressure of the aluminum alloy melt is 40 kPa - 55 kPa, the lifting boost pressure is 5 kPa - 15 kPa, and the lifting speed is 6 kPa·s -1 -12 kPa· -1 , and the pressure holding time is 180 s - 300 s.

[0141] According to an embodiment of the present invention, in step (i), the casting cavity of the aluminum alloy wheel hub 31 is prepared by the following method:

[0142] Start the left box mold displacer 14, the right box mold displacer 20, the front box mold displacer 23, and the rear box mold displacer 17, and push the left box mold 16, the right box mold 22, the front box mold 25, and the rear box mold 19 to move towards the center of the circle of the metal core 26;

[0143] Start the support rod adjuster 33, and push the top box mold 27 to move downward in the vertical direction;

[0144] The left box mold 16, the right box mold 22, the front box mold 25, the rear box mold 19, the metal core 26, and the top box mold 27 form the casting cavity of the aluminum alloy wheel hub 31.

[0145] According to an embodiment of the present invention, in step (i), before injecting the aluminum alloy melt into the casting cavity of the aluminum alloy wheel hub 31, the left box mold 16, the right box mold 22, the front box mold 25, the rear box mold 19, the metal core 26, and the top box mold 27 are preheated so that the preheating temperatures of the left box mold 16, the right box mold 22, the front box mold 25, and the rear box mold 19 are 280°C - 320°C respectively; the preheating temperatures of the metal core 26 and the top box mold 27 are 200°C - 240°C respectively.

[0146] According to an embodiment of the present invention, in step (i), the following method is used to inject the aluminum alloy melt into the casting cavity of the aluminum alloy wheel hub 31:

[0147] Fill the aluminum alloy melt in the crucible 9, start the low-pressure casting machine, and the aluminum alloy melt in the crucible 9 flows through the lifting pipe 13 under pressure and is injected into the casting cavity of the aluminum alloy wheel hub 31 to complete the low-pressure casting of the aluminum alloy wheel hub 31 in a metal mold.

[0148] According to an embodiment of the present invention, in step (ii), it specifically includes the following steps:

[0149] Start the left box mold displacer 14, the right box mold displacer 20, the front box mold displacer 23 and the rear box mold displacer 17, and push the left box mold 16, the right box mold 22, the front box mold 25 and the rear box mold 19 to move outward along the center direction of the metal core 26;

[0150] Start the support rod position adjuster 33, and push the top box mold 27 to move upward in the vertical direction.

[0151] According to an embodiment of the present invention, in step (ii), push the left box mold 16 to move outward 40 mm - 80 mm along the center direction of the metal core 26; push the right box mold 22 to move outward 40 mm - 80 mm along the center direction of the metal core 26; push the front box mold 25 to move outward 40 mm - 80 mm along the center direction of the metal core 26; push the rear box mold 19 to move outward 40 mm - 80 mm along the center direction of the metal core 26.

[0152] According to an embodiment of the present invention, in step (ii), push the top box mold 27 to move upward in the vertical direction so that the distance between the top box mold 27 and the metal core 26 is 120 mm - 150 mm.

[0153] According to an embodiment of the present invention, in step (iii), start the inner rim laser rangefinder connecting rod position adjuster 41, and adjust the inner rim laser rangefinder 29 to the edge position of the inner rim of the aluminum alloy wheel hub 31.

[0154] Preferably, adjust the inner rim laser rangefinder 29 so that the height distance between the inner rim laser rangefinder 29 and the edge of the inner rim of the aluminum alloy wheel hub 31 is 15 mm - 35 mm.

[0155] According to an embodiment of the present invention, in step (iii), start the outer rim laser rangefinder connecting rod position adjuster 44, and adjust the outer rim laser rangefinder 30 to the outer rim edge position of the aluminum alloy wheel hub 31.

[0156] Preferably, adjust the outer rim laser rangefinder 30 so that the height distance between the outer rim laser rangefinder 30 and the edge of the outer rim of the aluminum alloy wheel hub 31 is 15 mm - 35 mm.

[0157] According to an embodiment of the present invention, in step (iii), turn on the gear drive motor 3 in the transmission unit, drive the gear 5 to rotate through the gear drive motor speed rod 4, the gear 5 drives the transmission gear 11 to rotate, and the transmission gear 11 drives the aluminum alloy wheel hub 31 to rotate.

[0158] According to an embodiment of the present invention, in step (iii), it specifically includes the following steps:

[0159] Adjust the inner rim laser rangefinder 29 to the edge position of the inner rim of the aluminum alloy wheel hub 31, and adjust the outer rim laser rangefinder 30 to the edge position of the outer rim of the aluminum alloy wheel hub 31;

[0160] Start the transmission unit to drive the aluminum alloy wheel hub 31 to rotate at a low speed;

[0161] Start the inner rim laser rangefinder 29 to perform laser ranging on the inner rim of the aluminum alloy wheel hub 31, and start the outer rim laser rangefinder 30 to perform laser ranging on the outer rim of the aluminum alloy wheel hub 31;

[0162] Calculate the laser ranging results and theoretical values of the inner rim laser rangefinder 29 and the outer rim laser rangefinder 30 according to Equation 1:

[0163] Equation 1

[0164] Wherein, L is the circumference of the inner rim or the outer rim of the aluminum alloy wheel hub; ω is the rotational speed of the aluminum alloy wheel hub;

[0165] Compare the laser ranging results and theoretical values of the inner rim laser rangefinder 29 and the outer rim laser rangefinder 30:

[0166] If υ 1 <υ 1 ’, and υ 2 >υ 2 ’, it indicates that the aluminum alloy wheel hub 31 deforms inward. Start the transmission unit to drive the aluminum alloy wheel hub 31 to rotate at a high speed; Use the hot reverse mechanical correction rod 28 to apply a moment outward along the center direction to the inner rim of the rotating aluminum alloy wheel hub 31;

[0167] If υ 1 >υ 1 ’, and υ 2 <υ 2 ’, it indicates that the aluminum alloy wheel hub 31 deforms outward. Start the transmission unit to drive the aluminum alloy wheel hub 31 to rotate at a high speed; Use the hot reverse mechanical correction rod 28 to apply a moment inward along the center direction to the outer rim of the rotating aluminum alloy wheel hub 31;

[0168] Wherein, υ 1 ’ is the calculated value of the theoretical rotational speed of the inner rim of the aluminum alloy wheel hub, υ 2 ’ is the calculated value of the theoretical rotational speed of the outer rim of the aluminum alloy wheel hub, υ 1 is the actual rotational speed of the inner rim of the laser ranging aluminum alloy wheel hub, υ2 is the actual rotational speed of the inner rim of the laser ranging aluminum alloy wheel hub.

[0169] According to an embodiment of the present invention, the rotational speed of the low-speed rotation is 10 r·min -1 -15 r·min -1 ; the rotational speed of the high-speed rotation is 1000 r·min -1 -1450 r·min -1 .

[0170] According to an embodiment of the present invention, when υ 1 <υ 1 ’ and υ 2 >υ 2 ’, adjust the hot reverse mechanical correction rod 28 to be close to the inner rim of the aluminum alloy wheel hub 31, and apply a moment outward along the center direction to the rotating aluminum alloy wheel hub 31 through the hot reverse mechanical correction rod 28 to perform hot reverse mechanical correction on the inner rim of the aluminum alloy wheel hub 31.

[0171] According to an embodiment of the present invention, when υ 1 <υ 1 ’ and υ 2 >υ 2 ’, start the position adjuster 36 of the connecting rod of the hot reverse mechanical correction rod, move the hot reverse mechanical correction rod 28 close to the inner rim of the aluminum alloy wheel hub 31, and make the “concave”-shaped correction end of the hot reverse mechanical correction rod 28 contact with the inner rim of the aluminum alloy wheel hub 31. Apply a moment outward along the center direction to the rotating aluminum alloy wheel hub 31 through the hot reverse mechanical correction rod 28 to perform hot reverse mechanical correction on the inner rim of the aluminum alloy wheel hub 31.

[0172] According to an embodiment of the present invention, when υ 1 >υ 1 ’ and υ 2 <υ 2 ’, adjust the hot reverse mechanical correction rod 28 to be close to the outer rim of the aluminum alloy wheel hub 31, and apply a moment inward along the center direction to the rotating aluminum alloy wheel hub 31 through the hot reverse mechanical correction rod 28 to perform hot reverse mechanical correction on the outer rim of the aluminum alloy wheel hub 31.

[0173] According to an embodiment of the present invention, when υ 1 >υ 1 ’ and υ 2 <υ 2When it is , by starting the hot-state reverse mechanical correction rod connecting rod adjuster 36, the hot-state reverse mechanical correction rod 28 is brought close to the outer rim of the aluminum alloy wheel hub 31, and the "concave"-shaped correction end of the hot-state reverse mechanical correction rod 28 is brought into contact with the outer rim of the aluminum alloy wheel hub 31. A moment acting inward in the direction of the center of the circle is applied to the rotating aluminum alloy wheel hub 31 through the hot-state reverse mechanical correction rod 28, and hot-state reverse mechanical correction is performed on the outer rim of the aluminum alloy wheel hub 31.

[0174] According to an embodiment of the present invention, when υ 1 and υ 1 ’ and υ 2 and υ 2 ’s comparison deviation is less than 2%, the drive unit (the gear drive motor 3 of the drive unit) is turned off, and the hot-state reverse mechanical correction and detection of the aluminum alloy wheel hub 31 are completed.

[0175] According to an embodiment of the present invention, the υ 1 and υ 1 ’s comparison deviation being less than 2% means |υ 1 -υ 1 ’| / υ 1 ’ < 2%; the υ 2 and υ 2 ’s comparison deviation being less than 2% means |υ 2 -υ 2 ’| / υ 2 ’ < 2%.

[0176] According to an embodiment of the present invention, in step (iii), by starting the hot-state reverse mechanical correction rod connecting rod adjuster 36, the hot-state reverse mechanical correction rod 28 is brought into contact with the aluminum alloy wheel hub 31, so that a moment acting inward or outward in the direction of the center of the circle is applied to the rotating aluminum alloy wheel hub 31 through the hot-state reverse mechanical correction rod 28. Preferably, the hot-state reverse mechanical correction rod 28 is brought close to the outer rim of the aluminum alloy wheel hub 31, and the "concave"-shaped correction end of the hot-state reverse mechanical correction rod 28 is brought into contact with the outer rim of the aluminum alloy wheel hub 31; or, the hot-state reverse mechanical correction rod 28 is brought close to the inner rim of the aluminum alloy wheel hub 31, and the "concave"-shaped correction end of the hot-state reverse mechanical correction rod 28 is brought into contact with the inner rim of the aluminum alloy wheel hub 31.

[0177] According to an embodiment of the present invention, the method further includes the following steps:

[0178] (iv) Push the top box mold 27, and remove the metal core 26 manually or mechanically. After removing the metal core 26, remove the aluminum alloy wheel hub 31 manually or mechanically, and perform dimensional tolerance, surface finish, and dynamic balance quality inspections on the aluminum alloy wheel hub 31.

[0179] The technical solution of the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only used to illustrate and explain the present invention exemplarily, and should not be construed as limiting the protection scope of the present invention. All technologies implemented based on the above content of the present invention are covered within the scope of protection intended by the present invention.

[0180] Unless otherwise specified, the experimental methods used in the following embodiments are all conventional methods; unless otherwise specified, the reagents, materials, etc. used in the following embodiments can all be obtained from commercial channels.

[0181] Embodiment 1

[0182] This embodiment provides a hot-state reverse mechanical correction and detection device for an aluminum alloy wheel hub of a new energy vehicle. The hot-state reverse mechanical correction and detection device includes a metal mold low-pressure casting unit, a mold cavity unit, a transmission unit, and a correction and detection unit; the correction and detection unit and the mold cavity unit are arranged above the metal mold low-pressure casting unit; the transmission unit is arranged on one side of the metal mold low-pressure casting unit;

[0183] The metal mold low-pressure casting unit includes a bottom plate 1, bottom plate support columns 6, a casting platform 7, a crucible slot coordination ring 8, a crucible 9, a riser pipe coordination ring 10, a transmission gear 11, a transmission gear bearing 12, and a riser pipe 13;

[0184] The transmission unit includes a gear drive motor support rod 2, a gear drive motor 3, a gear drive motor speed rod 4, and a gear 5;

[0185] The mold cavity unit includes a left box mold displacer 14, a left box mold slide rail 15, a left box mold 16, a rear box mold displacer 17, a rear box mold slide rail 18, a rear box mold 19, a right box mold displacer 20, a right box mold slide rail 21, a right box mold 22, a front box mold displacer 23, a front box mold slide rail 24, a front box mold 25, a metal core 26, and a top box mold 27;

[0186] The correction and detection unit includes a hot-state reverse mechanical correction rod 28, an inner rim laser rangefinder 29, an outer rim laser rangefinder 30, an aluminum alloy wheel hub 31, a support rod 32, a support rod adjuster 33, a support rod connecting frame 34, a hot-state reverse mechanical correction rod connecting rod 35, a hot-state reverse mechanical correction rod connecting rod adjuster 36, a support rod connecting frame limit post fastening nut 37, a support rod connecting frame limit post 38, an inner rim laser rangefinder connecting rod limiter 39, an inner rim laser rangefinder connecting rod 40, an inner rim laser rangefinder connecting rod adjuster 41, an outer rim laser rangefinder connecting rod limiter 42, an outer rim laser rangefinder connecting rod 43, and an outer rim laser rangefinder connecting rod adjuster 44;

[0187] In the transmission unit, the gear drive motor support rod 2 and the gear drive motor speed rod 4 are connected by the gear drive motor 3, and the gear drive motor speed rod 4 is connected to the gear 5; moreover, the centers of the gear drive motor support rod 2, the gear drive motor 3, the gear drive motor speed rod 4, and the gear 5 are collinear.

[0188] The gear drive motor 3 drives the gear 5 to rotate through the gear drive motor speed rod 4, the gear 5 drives the transmission gear 11 to rotate, and the transmission gear 11 drives the aluminum alloy wheel hub 31 to rotate.

[0189] In the metal mold low-pressure casting unit, the crucible slot coordination ring 8 is in limit fit with the central circular hole of the casting platform 7; the crucible 9 is in limit fit with the crucible slot coordination ring 8; the transmission gear 11 is located directly above the crucible 9; the lift pipe coordination ring 10 is located below the transmission gear 11 and is connected to the transmission gear 11; the transmission gear bearing 12 is located at the center of the transmission gear 11 and is in limit fit through the lift pipe coordination ring 10; the lift pipe 13 passes through the transmission gear bearing 12 and the lift pipe coordination ring 10 and is positioned through the lift pipe coordination ring 10.

[0190] The bottom plate 1 is located below the casting platform 7, and the bottom plate 1 is connected to the casting platform 7 through the bottom plate support column 6; the bottom end of the lift pipe 13 is located inside the crucible 9, and the top end of the lift pipe 13 is located above the transmission gear 11; the centers of the lift pipe 13, the transmission gear bearing 12, the transmission gear 11, the lift pipe coordination ring 10, and the crucible 9 are collinear; the top surface of the crucible 9 is coplanar with the horizontal plane of the casting platform 7.

[0191] In the mold cavity unit, the left box mold 16 is located on the left side of the metal core 26, the right box mold 22 is located on the right side of the metal core 26, the rear box mold 19 is located on the rear side of the metal core 26, the front box mold 25 is located on the front side of the metal core 26, the top box mold 27 is located directly above the metal core 26, and the left box mold 16, the rear box mold 19, the right box mold 22, the front box mold 25, the metal core 26, and the top box mold 27 together form the casting cavity of the aluminum alloy wheel hub.

[0192] The left box mold displacer 14 is connected to the left box mold 16 through the left box mold slide rail 15, the right box mold displacer 20 is connected to the right box mold 22 through the right box mold slide rail 21, the rear box mold displacer 17 is connected to the rear box mold 19 through the rear box mold slide rail 18, and the front box mold displacer 23 is connected to the front box mold 25 through the front box mold slide rail 24.

[0193] The metal core 26 is located directly above the transmission gear 11, and the centers of the metal core 26 and the transmission gear 11 are collinear; the left box mold 16, the right box mold 22, the rear box mold 19, the front box mold 25, the rear box mold displacer 17, the front box mold displacer 23, the right box mold displacer 20, and the left box mold displacer 14 are located on the casting platform 7 of the low-pressure metal casting unit;

[0194] In the correction and detection unit, the hot reverse mechanical correction screw rod 28 is located at the center of the top box mold 27 and is in limit cooperation with the top box mold 27; the top end of the hot reverse mechanical correction screw rod 28 is connected to the hot reverse mechanical correction screw rod connecting rod adjuster 36 through the hot reverse mechanical correction screw rod connecting rod 35; the centers of the hot reverse mechanical correction screw rod connecting rod 35 and the hot reverse mechanical correction screw rod connecting rod adjuster 36 are collinear; the hot reverse mechanical correction screw rod connecting rod adjuster 36 is used to adjust the distance between the hot reverse mechanical correction screw rod 28 and the top box mold 27; the hot reverse mechanical correction screw rod 28 is used to apply a moment inward or outward along the center direction to the aluminum alloy wheel hub 31 to achieve hot reverse mechanical correction of the aluminum alloy wheel hub 31;

[0195] The top end of the inner rim laser rangefinder 29 is located inside the top box mold 27 and is in limit cooperation with the top box mold 27; the bottom end of the inner rim laser rangefinder 29 is located below the top box mold 27; the inner rim laser rangefinder 29 is used to measure the distance of the inner rim of the aluminum alloy wheel hub; the top end of the inner rim laser rangefinder 29 is connected to the bottom end of the inner rim laser rangefinder connecting rod 40, and the top end of the inner rim laser rangefinder connecting rod 40 is connected to the inner rim laser rangefinder connecting rod adjuster 41 through the inner rim laser rangefinder connecting rod limiter 39; the centers of the inner rim laser rangefinder connecting rod limiter 39, the inner rim laser rangefinder connecting rod 40, and the inner rim laser rangefinder connecting rod adjuster 41 are collinear; the inner rim laser rangefinder connecting rod adjuster 41 is located directly above the inner rim laser rangefinder connecting rod 40 and is used to adjust the distance between the aluminum alloy wheel hub inner rim laser rangefinder 29 and the bottom end of the top box mold 27;

[0196] The top end of the outer wheel rim laser rangefinder 30 is located inside the top box mold 27 and is limitedly matched with the top box mold 27; the bottom end of the outer wheel rim laser rangefinder 30 is located below the top box mold 27; the outer wheel rim laser rangefinder 30 is used to measure the distance of the outer wheel rim of the aluminum alloy wheel hub; the top end of the outer wheel rim laser rangefinder 30 is connected to the bottom end of the outer wheel rim laser rangefinder connecting rod 43, and the top end of the outer wheel rim laser rangefinder connecting rod 43 is connected to the outer wheel rim laser rangefinder connecting rod 43 through the outer wheel rim laser rangefinder. The distance meter connecting rod stopper 42 is connected to the outer wheel rim laser distance meter connecting rod positioner 44; the center points of the outer wheel rim laser distance meter connecting rod stopper 42, the outer wheel rim laser distance meter connecting rod 43 and the outer wheel rim laser distance meter connecting rod positioner 44 are collinear; the outer wheel rim laser distance meter connecting rod positioner 44 is located directly above the outer wheel rim laser distance meter connecting rod 43, and is used to adjust the distance between the outer wheel rim laser distance meter 30 of the aluminum alloy wheel hub and the bottom end of the top box mold 27;

[0197] The support rod connecting frame 34 is located directly above the hot reverse mechanical correction rotary rod connecting rod 35, the hot reverse mechanical correction rotary rod connecting rod positioner 36 is located directly above the support rod connecting frame 34, and the lower end of the support rod connecting frame 34 is connected to the hot reverse mechanical correction rotary rod connecting rod 35, and the upper end of the support rod connecting frame 34 is connected to the hot reverse mechanical correction rotary rod connecting rod positioner 36;

[0198] The bottom of the support rod 32 is connected to the casting platform 7, and the top of the support rod 32 is connected to the support rod connecting frame 34; the support rod positioner 33 is arranged on the support rod 32; the center points of the support rod connecting frame 34, the hot reverse mechanical correction rotary rod connecting rod 35 and the hot reverse mechanical correction rotary rod connecting rod positioner 36 are collinear; the support rods 32 are distributed at the four corners of the casting platform 7, and the support rods 32 are symmetrically distributed along the length direction of the casting platform 7; the support rod positioner 33 is arranged at the middle position of the support rod 32 along the height direction. The number of the support rod positioners 33 is 4; the support rod positioner 33 is used to adjust the position of the top box mold 27, for example, to adjust the distance between the top box mold 27 and the casting platform 7 or to adjust the distance between the top box mold 27 and the metal core 26;

[0199] The bottom end of the support rod connecting frame limiting column 38 is connected to the top box mold 27 in the mold cavity unit through the support rod connecting frame limiting column fastening nut 37; the top end of the support rod connecting frame limiting column 38 is connected to the support rod connecting frame 34; the number of the support rod connecting frame limiting columns 38 is 4, and the support rod connecting frame limiting columns 38 are located at the midpoint of each beam of the "X"-shaped support rod connecting frame 34; the support rod connecting frame limiting columns 38 are used to provide structural support to the support rod connecting frame 34 on the top box mold 27.

[0200] In a preferred embodiment of the present invention, the shape of the hot reverse mechanical correction rotating rod 28 is an "L" shape. The short side of the "L" shape is connected to the bottom end of the hot reverse mechanical correction rotating rod connecting rod 35. The long side of the "L" shape is a correction side with a correction end. The length of the long side of the "L" shape is greater than the outer diameter of the aluminum alloy wheel hub 31. The shape of the correction end is a "concave" shape, and the end of the "concave" shape is hemispherical. The width of the groove of the "concave" shape is greater than the thickness of the rim of the aluminum alloy wheel hub 31.

[0201] Example 2

[0202] This embodiment provides a method for hot reverse mechanical correction and detection of an aluminum alloy wheel hub of a new energy vehicle. The method is based on the hot reverse mechanical correction and detection device for the aluminum alloy wheel hub of a new energy vehicle described in Example 1. The method includes the following steps:

[0203] (i-1) Start the left box mold displacer 14, the right box mold displacer 20, the front box mold displacer 23, and the rear box mold displacer 17 to push the left box mold 16, the right box mold 22, the front box mold 25, and the rear box mold 19 towards the center of the metal core 26; start the support rod position adjuster 33 to push the top box mold 27 to move downward in the vertical direction; the left box mold 16, the right box mold 22, the front box mold 25, the rear box mold 19, the metal core 26, and the top box mold 27 form a casting cavity for the aluminum alloy wheel hub.

[0204] (i-2) Preheat the left box mold 16, the right box mold 22, the front box mold 25, the rear box mold 19, the metal core 26, and the top box mold 27 so that the mold temperatures of the left box mold 16, the right box mold 22, the front box mold 25, and the rear box mold 19 are 280°C - 320°C, and the mold temperatures of the metal core 26 and the top box mold 27 are 200°C - 240°C.

[0205] (i-3) Fill the crucible 9 with aluminum alloy melt, start the low-pressure casting machine, and the aluminum alloy melt in the crucible 9 flows through the riser pipe 13 and is injected into the casting cavity of the aluminum alloy wheel hub under pressure. Among them, the temperature of the aluminum alloy melt is 685°C - 715°C, the riser pressure of the aluminum alloy melt is 40 kPa - 55 kPa, the riser boosting pressure is 5 kPa - 15 kPa, the riser speed is 6 kPa·s -1 -12 kPa· -1 , and the pressure holding time is 180 s - 300 s to complete the metal mold low-pressure casting of the aluminum alloy wheel hub 31 and prepare the aluminum alloy wheel hub 31.

[0206] (ii)After the low-pressure die casting of the aluminum alloy wheel hub 31 in the metal mold is completed, push the left box mold 16, the right box mold 22, the front box mold 25, and the rear box mold 19 to move outward 40 - 80 mm along the center direction of the metal core 26 respectively; push the top box mold 27 to move upward in the vertical direction so that the distance between the top box mold 27 and the metal core 26 is 120 mm - 150 mm;

[0207] (iii)Start the inner rim laser rangefinder connecting rod adjuster 41, and adjust the inner rim laser rangefinder 29 so that the height distance between the inner rim laser rangefinder 29 and the edge of the inner rim of the aluminum alloy wheel hub 31 is 15 mm - 35 mm; start the outer rim laser rangefinder connecting rod adjuster 44, and adjust the outer rim laser rangefinder 30 so that the height distance between the outer rim laser rangefinder 30 and the edge of the outer rim of the aluminum alloy wheel hub 31 is 15 mm - 35 mm;

[0208] Turn on the gear drive motor 3, drive the gear 5 to rotate through the gear drive motor speed rod 4, the gear 5 drives the transmission gear 11 to rotate, and the transmission gear 11 drives the aluminum alloy wheel hub 31 to rotate; the rotation speed is 10 r·min -1 -15 r·min -1 ;

[0209] Turn on the inner rim laser rangefinder 29 to perform laser ranging on the inner rim of the aluminum alloy wheel hub 31, and turn on the outer rim laser rangefinder 30 to perform laser ranging on the outer rim of the aluminum alloy wheel hub 31;

[0210] Calculate the laser ranging results and theoretical values of the inner rim laser rangefinder 29 and the outer rim laser rangefinder 30 according to Equation 1:

[0211] Equation 1

[0212] Where, L is the circumference of the inner rim or outer rim of the aluminum alloy wheel hub; ω is the rotation speed of the aluminum alloy wheel hub;

[0213] Compare the laser ranging results and theoretical values of the inner rim laser rangefinder 29 and the outer rim laser rangefinder 30:

[0214] If υ 1 <υ 1 ’, and υ 2 >υ 2’, indicating that the aluminum alloy wheel hub 31 deforms inward, starting the gear drive motor 3 to drive the aluminum alloy wheel hub 31 to rotate; applying a moment outward along the center direction to the inner rim of the rotating aluminum alloy wheel hub 31 by using the hot reverse mechanical correction rod 28; the rotation speed is 1000 r·min -1 -1450 r·min -1 ;

[0215] If υ 1 > υ 1 ’, and υ 2 < υ 2 ’, indicating that the aluminum alloy wheel hub 31 deforms outward, starting the gear drive motor 3 to drive the aluminum alloy wheel hub 31 to rotate; applying a moment inward along the center direction to the outer rim of the rotating aluminum alloy wheel hub 31 by using the hot reverse mechanical correction rod 28; the rotation speed is 1000 r·min -1 -1450 r·min -1 ;

[0216] Among them, υ 1 ’ is the calculated value of the theoretical rotation speed of the inner rim of the aluminum alloy wheel hub, υ 2 ’ is the calculated value of the theoretical rotation speed of the outer rim of the aluminum alloy wheel hub, υ 1 is the actual rotation speed of the inner rim of the aluminum alloy wheel hub measured by laser ranging, υ 2 is the actual rotation speed of the inner rim of the aluminum alloy wheel hub measured by laser ranging;

[0217] When υ 1 < υ 1 ’ and υ 2 > υ 2 ’, by starting the position adjuster 36 of the connecting rod of the hot reverse mechanical correction rod, bringing the hot reverse mechanical correction rod 28 close to the inner rim of the aluminum alloy wheel hub 31, and making the “concave” shaped correction end of the hot reverse mechanical correction rod 28 contact with the inner rim of the aluminum alloy wheel hub 31, applying a moment outward along the center direction to the rotating aluminum alloy wheel hub 31 by using the hot reverse mechanical correction rod 28, and performing hot reverse mechanical correction on the inner rim of the aluminum alloy wheel hub 31;

[0218] When υ 1 > υ 1 ’ and υ 2 < υ 2When it is 'o'clock', by starting the hot-state reverse mechanical correction swing rod connecting rod adjuster 36, the hot-state reverse mechanical correction swing rod 28 is brought close to the outer rim of the aluminum alloy wheel hub 31, and the 'concave'-shaped correction end of the hot-state reverse mechanical correction swing rod 28 is made to contact the outer rim of the aluminum alloy wheel hub 31. A moment acting inward in the direction of the center of the circle is applied to the rotating aluminum alloy wheel hub 31 through the hot-state reverse mechanical correction swing rod 28, and hot-state reverse mechanical correction is performed on the outer rim of the aluminum alloy wheel hub 31;

[0219] When υ 1 and υ 1 ' and υ 2 and υ 2 When the comparison deviation with υ' is less than 2%, turn off the transmission gear drive motor 3 to complete the hot-state reverse mechanical correction and detection of the aluminum alloy wheel hub 31.

[0220] (iv) Push the top box mold 27, and take out the metal core 26 manually or mechanically. After taking out the metal core 26, take out the aluminum alloy wheel hub 31 manually or mechanically, and perform dimensional tolerance, surface finish, and dynamic balance quality inspections on the aluminum alloy wheel hub 31.

[0221] Example 3

[0222] This example provides a hot-state reverse mechanical correction and detection method for aluminum alloy wheel hubs of new energy vehicles. The method is based on the hot-state reverse mechanical correction and detection device for aluminum alloy wheel hubs of new energy vehicles described in Example 1 and the hot-state reverse mechanical correction and detection method for aluminum alloy wheel hubs of new energy vehicles described in Example 2. The method specifically includes the following steps:

[0223] In step (i-2), preheat the left box mold 16, right box mold 22, front box mold 25, rear box mold 19, metal core 26, and top box mold 27, so that the mold temperatures of the left box mold 16, right box mold 22, front box mold 25, and rear box mold 19 are 300 °C, and the mold temperatures of the metal core 26 and top box mold 27 are 220 °C;

[0224] In step (i-3), the low-pressure casting temperature of the aluminum alloy melt is 700 °C, the lifting pressure of the aluminum alloy melt is 50 kPa, the lifting and boosting pressure is 10 kPa, and the lifting speed is 8 kPa·s -1 , and the pressure holding time is 240 s;

[0225] In step (ii), after the low-pressure casting of the aluminum alloy wheel hub 31 in the metal mold is completed, push the left box mold 16, right box mold 22, front box mold 25, and rear box mold 19 to move 60 mm outward along the center direction of the metal core 26 respectively; push the top box mold 27 to move upward in the vertical direction so that the distance between the top box mold 27 and the metal core 26 is 135 mm;

[0226] In step (iii), the height distance between the inner rim laser rangefinder 29 and the edge of the inner rim of the aluminum alloy wheel hub 31 is 25 mm; the height distance between the outer rim laser rangefinder 30 and the edge of the outer rim of the aluminum alloy wheel hub 31 is 25 mm; the rotational speed of the aluminum alloy wheel hub 31 during low-speed rotation is 12 r·min -1 ; the rotational speed of the aluminum alloy wheel hub 31 during high-speed rotation is 1250 r·min -1 .

[0227] The working mode of the gear drive motor 3 is stepper, the step angle is 1.4°, the torque is 3000 N·m, and the moment of inertia is 1600 Kg·m 2 , and the rated power is 650 kW; the module of the gear 5 is 32, the number of teeth is 28, the pressure angle is 20°, and the tooth width is 0.3; the module of the transmission gear 11 is 85, the number of teeth is 100, the pressure angle is 22°, and the tooth width is 0.4; the inner diameter of the transmission gear bearing 12 is 130 mm, the outer diameter is 190 mm, the width is 22 mm, the dynamic load is 4250 N, the static load is 1350 N, and the limit rotational speed is 6250 r·min -1 .

[0228] The resolution of the inner rim laser rangefinder 29 and the outer rim laser rangefinder 30 is 0.8 mm, the measuring distance is 200 m, the measuring accuracy is ±0.8 mm, the laser is visible red light, the wavelength of the visible red light is 650 nm, the safety level is Class3R, the environmental protection level is IP 67, and the data storage frequency is 0.05 s.

[0229] The material of the aluminum alloy wheel hub in Example 3 is A356. Table 1 shows the comparison effect of the process methods between Example 3 and the aluminum alloy wheel hub with manual mechanical correction Figure 12 is a schematic diagram of the physical object of the aluminum alloy wheel hub for new energy vehicles prepared in Example 3.

[0230] Table 1 Comparison effect of the process methods between Example 3 and the aluminum alloy wheel hub with manual mechanical correction

[0231]

[0232] Example 4

[0233] This embodiment provides a method for hot-state reverse mechanical correction and detection of an aluminum alloy wheel hub for a new energy vehicle. The method is based on the device for hot-state reverse mechanical correction and detection of an aluminum alloy wheel hub for a new energy vehicle described in Example 1 and the method for hot-state reverse mechanical correction and detection of an aluminum alloy wheel hub for a new energy vehicle described in Example 2. The method specifically includes the following steps:

[0234] In step (i-2), preheat the left box mold 16, right box mold 22, front box mold 25, rear box mold 19, metal core 26 and top box mold 27 so that the mold temperatures of the left box mold 16, right box mold 22, front box mold 25 and rear box mold 19 are 280 °C, and the mold temperatures of the metal core 26 and top box mold 27 are 200 °C;

[0235] In step (i-3), the low-pressure casting temperature of the aluminum alloy melt is 685 °C, the lift pressure of the aluminum alloy melt is 40 kPa, the lift boosting pressure is 5 kPa, and the lift speed is 6 kPa·s -1 , and the pressure holding time is 180 s;

[0236] In step (ii), after the low-pressure metal mold casting of the aluminum alloy wheel hub 31 is completed, push the left box mold 16, right box mold 22, front box mold 25 and rear box mold 19 to move 40 mm outward along the center direction of the metal core 26 respectively; push the top box mold 27 to move upward in the vertical direction so that the distance between the top box mold 27 and the metal core 26 is 120 mm;

[0237] In step (iii), the height distance between the inner rim laser rangefinder 29 and the edge of the inner rim of the aluminum alloy wheel hub 31 is 15 mm; the height distance between the outer rim laser rangefinder 30 and the edge of the outer rim of the aluminum alloy wheel hub 31 is 15 mm; the rotation speed of the aluminum alloy wheel hub 31 during low-speed rotation is 10 r·min -1 ; the rotation speed of the aluminum alloy wheel hub 31 during high-speed rotation is 1000 r·min -1 .

[0238] The working mode of the gear drive motor 3 is stepper, the step angle is 1.2°, the torque is 2000 N·m, the moment of inertia is 800 Kg·m 2 , and the rated power is 450 kW; the module of the gear 5 is 25, the number of teeth is 24, the pressure angle is 18°, and the tooth width is 0.2; the module of the transmission gear 11 is 75, the number of teeth is 80, the pressure angle is 20°, and the tooth width is 0.3; the inner diameter of the transmission gear bearing 12 is 120 mm, the outer diameter is 180 mm, the width is 20 mm, the dynamic load is 4000 N, the static load is 1200 N, and the limit speed is 6000 r·min -1 .

[0239] The resolutions of the inner rim laser rangefinder 29 and the outer rim laser rangefinder 30 are 0.5 mm, the measurement distance is 120 m, the measurement accuracy is ±1.0 mm, the laser is visible red light, the wavelength of the visible red light is 615 nm, the safety level is Class3R, the environmental protection level is IP 67, and the data storage frequency is 0.02 s.

[0240] The aluminum alloy wheel hub material in Example 4 is A357. Table 2 shows the comparison effect of the process methods between Example 4 and the conventional mechanically corrected aluminum alloy wheel hub. Figure 13 Figure 3 is a schematic diagram of the physical object of the aluminum alloy wheel hub for new energy vehicles prepared in Example 4.

[0241] Table 2 Comparison effect of the process methods between Example 4 and the conventional mechanically corrected aluminum alloy wheel hub

[0242]

[0243] Example 5

[0244] This example provides a hot-state reverse mechanical correction and detection method for the aluminum alloy wheel hub of new energy vehicles. The method is based on the hot-state reverse mechanical correction and detection device for the aluminum alloy wheel hub of new energy vehicles described in Example 1 and the hot-state reverse mechanical correction and detection method for the aluminum alloy wheel hub of new energy vehicles described in Example 2. The method specifically includes the following steps:

[0245] In step (i-2), preheat the left box mold 16, right box mold 22, front box mold 25, rear box mold 19, metal core 26 and top box mold 27, so that the mold temperatures of the left box mold 16, right box mold 22, front box mold 25 and rear box mold 19 are 320 °C, and the mold temperatures of the metal core 26 and top box mold 27 are 240 °C;

[0246] In step (i-3), the low-pressure casting temperature of the aluminum alloy melt is 715 °C, the lift pressure of the aluminum alloy melt is 55 kPa, the lift boost pressure is 15 kPa, and the lift speed is 12 kPa·s -1 , and the pressure holding time is 300 s;

[0247] In step (ii), after the low-pressure casting of the aluminum alloy wheel hub 31 in the metal mold is completed, push the left box mold 16, right box mold 22, front box mold 25 and rear box mold 19 to move 60 mm outward along the center direction of the metal core 26 respectively; push the top box mold 27 to move upward in the vertical direction so that the distance between the top box mold 27 and the metal core 26 is 150 mm;

[0248] In step (iii), the distance between the inner rim laser rangefinder 29 and the edge of the inner rim of the aluminum alloy wheel hub 31 is 40 mm; the distance between the outer rim laser rangefinder 30 and the edge of the outer rim of the aluminum alloy wheel hub 31 is 40 mm; the rotation speed of the aluminum alloy wheel hub 31 for low-speed rotation is 15 r·min -1 ; the rotation speed of the aluminum alloy wheel hub 31 for high-speed rotation is 1450 r·min -1 .

[0249] The working mode of the gear-driven motor 3 is stepping, with a step angle of 1.5°, a torque of 4000 N·m, a moment of inertia of 2400 Kg·m 2 , and a rated power of 800 kW; the module of the gear 5 is 40, the number of teeth is 32, the pressure angle is 22°, and the tooth width is 0.4; the module of the transmission gear 11 is 100, the number of teeth is 120, the pressure angle is 25°, and the tooth width is 0.5; the inner diameter of the transmission gear bearing 12 is 140 mm, the outer diameter is 200 mm, the width is 24 mm, the dynamic load is 4500 N, the static load is 1500 N, and the limit speed is 6500 r·min -1 .

[0250] The resolution of the inner rim laser rangefinder 29 and the outer rim laser rangefinder 30 is 1.0 mm, the measurement distance is 500 m, the measurement accuracy is ±0.5 mm, the laser is visible red light, the wavelength of the visible red light is 680 nm, the safety level is Class3R, the environmental protection level is IP 67, and the data storage frequency is 0.1 s.

[0251] The aluminum alloy wheel hub in Example 5 is made of A356. Table 3 shows the comparison effect of the process methods between Example 5 and the manually mechanically corrected aluminum alloy wheel hub, Figure 14 which is a schematic diagram of the physical object of the aluminum alloy wheel hub for new energy vehicles prepared in Example 5.

[0252] Table 3 Comparison effect of the process methods between Example 5 and the manually mechanically corrected aluminum alloy wheel hub

[0253]

[0254] The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hot reverse mechanical correction and detection device for aluminum alloy wheels of new energy vehicles, characterized in that: The hot reverse mechanical correction and detection device comprises a metal mold low-pressure casting unit, a mold cavity unit, a transmission unit and a correction and detection unit; the correction and detection unit and the mold cavity unit are arranged above the metal mold low-pressure casting unit; the transmission unit is arranged on one side of the metal mold low-pressure casting unit; The mold cavity unit includes a left box mold, a rear box mold, a right box mold, a front box mold, a metal core and a top box mold; the left box mold, the rear box mold, the right box mold and the front box mold are located around the metal core, and the top box mold is located directly above the metal core. The left box mold, the rear box mold, the right box mold, the front box mold, the metal core and the top box mold constitute the casting cavity of the aluminum alloy wheel hub; The calibration and detection unit includes a hot reverse mechanical calibration rotary rod, an inner rim laser rangefinder, an aluminum alloy wheel hub, and an outer rim laser rangefinder; The hot reverse mechanical correction rotating rod is located at the center of the top box mold and is limited to the top box mold; the inner rim laser distance meter is located on one side of the top box mold and is limited to the top box mold; the outer rim laser distance meter is located on the other side of the top box mold and is limited to the top box mold; The transmission unit includes a gear-driven motor support rod, a gear-driven motor, a gear-driven motor speed rod and a gear; the gear-driven motor support rod and the gear-driven motor speed rod are connected through the gear-driven motor, and the gear-driven motor speed rod is connected to the gear; the centers of the gear-driven motor support rod, the gear-driven motor, the gear-driven motor speed rod and the gear are collinear; The metal mold low-pressure casting unit includes a casting platform, a crucible slot coordination ring, a crucible, a riser tube coordination ring, a transmission gear, a transmission gear bearing and a riser tube; the crucible slot coordination ring is limitedly matched with the central circular hole of the casting platform; the crucible is limitedly matched with the crucible slot coordination ring; the transmission gear is located directly above the crucible; the riser tube coordination ring is located below the transmission gear and is connected to the transmission gear; the transmission gear bearing is located at the center of the transmission gear and is limitedly matched through the riser tube coordination ring; the riser tube passes through the transmission gear bearing and the riser tube coordination ring and is positioned through the riser tube coordination ring; the transmission gear is toothed with the gear in the transmission unit; The metal core is located directly above the transmission gear of the metal mold low-pressure casting unit, and the center of the metal core and the transmission gear are colinear; The hot reverse mechanical correction and detection device quickly detects the solidification deformation of the inner rim and the outer rim of the aluminum alloy wheel hub after the aluminum alloy wheel hub completes the low-pressure casting of the metal mold, and when the yield strength limit of the aluminum alloy wheel hub is low, the hot reverse mechanical correction rotary rod is used to apply an inward or outward torque along the center direction to the rotating aluminum alloy wheel hub to achieve hot reverse mechanical correction of the aluminum alloy wheel hub.

2. The thermal reverse mechanical correction and detection device according to claim 1, characterized in that: The two sides of the left box mold are in contact with the rear box mold and the front box mold respectively, the two sides of the rear box mold are in contact with the left box mold and the right box mold respectively, the two sides of the right box mold are in contact with the rear box mold and the front box mold respectively, and the two sides of the front box mold are in contact with the left box mold and the right box mold respectively; the left box mold, the right box mold, the rear box mold, and the front box mold are located on the casting platform of the metal mold low-pressure casting unit.

3. The thermal reverse mechanical correction and detection device according to claim 2, characterized in that: The mold cavity unit also includes a left box mold shifter, a left box mold slide rail, a rear box mold shifter, a rear box mold slide rail, a right box mold shifter, a right box mold slide rail, a front box mold shifter and a front box mold slide rail; The left box mold displacer is connected to the left box mold through the left box mold slide rail, the right box mold displacer is connected to the right box mold through the right box mold slide rail, the rear box mold displacer is connected to the rear box mold through the rear box mold slide rail, and the front box mold displacer is connected to the front box mold through the front box mold slide rail; The rear box mold displacer, the front box mold displacer, the right box mold displacer and the left box mold displacer are located on the casting platform of the metal mold low-pressure casting unit.

4. The thermal reverse mechanical correction and detection device according to claim 3, characterized in that: The top end of the hot reverse mechanical correction rotating rod is located inside the top box mold and is limitedly matched with the top box mold; the bottom end of the hot reverse mechanical correction rotating rod is located below the top box mold; The hot reverse mechanical correction rotating rod is used to apply a torque inward or outward along the center direction of the aluminum alloy wheel hub to achieve hot reverse mechanical correction of the aluminum alloy wheel hub; The shape of the hot reverse mechanical correction rotating rod is an "L" shape, the short side of the "L" shape is connected to the bottom end of the hot reverse mechanical correction rotating rod connecting rod, and the long side of the "L" shape is a correction side with a correction end; the length of the long side of the "L" shape is greater than the outer diameter of the aluminum alloy wheel hub; the shape of the correction end is a "concave" shape, and the end of the "concave" shape is a hemispherical shape; the width of the groove of the "concave" shape is greater than the thickness of the rim of the aluminum alloy wheel hub; The correction and detection unit also includes a hot reverse mechanical correction rotary rod connecting rod and a hot reverse mechanical correction rotary rod connecting rod positioner; the top end of the hot reverse mechanical correction rotary rod is connected to the hot reverse mechanical correction rotary rod connecting rod positioner through the hot reverse mechanical correction rotary rod connecting rod; The center points of the hot reverse mechanical correction rotary rod connecting rod and the hot reverse mechanical correction rotary rod connecting rod positioner are collinear; The hot reverse mechanical correction rotary rod connecting rod positioner is used to adjust the distance between the hot reverse mechanical correction rotary rod and the top box mold.

5. The thermal reverse mechanical correction and detection device according to claim 4, characterized in that: The top end of the inner wheel rim laser distance meter is located inside the top box mold and is limited with the top box mold; the bottom end of the inner wheel rim laser distance meter is located below the top box mold; the top end of the outer wheel rim laser distance meter is located inside the top box mold and is limited with the top box mold; the bottom end of the outer wheel rim laser distance meter is located below the top box mold; The calibration and detection unit also includes an inner wheel rim laser rangefinder connecting rod stopper, an inner wheel rim laser rangefinder connecting rod and an inner wheel rim laser rangefinder connecting rod positioner; the top end of the inner wheel rim laser rangefinder is connected to the bottom end of the inner wheel rim laser rangefinder connecting rod, and the top end of the inner wheel rim laser rangefinder connecting rod is connected to the inner wheel rim laser rangefinder connecting rod positioner through the inner wheel rim laser rangefinder connecting rod stopper; the center points of the inner wheel rim laser rangefinder connecting rod stopper, the inner wheel rim laser rangefinder connecting rod and the inner wheel rim laser rangefinder connecting rod positioner are collinear; The calibration and detection unit also includes an outer wheel rim laser rangefinder connecting rod limiter, an outer wheel rim laser rangefinder connecting rod and an outer wheel rim laser rangefinder connecting rod positioner; the top end of the outer wheel rim laser rangefinder is connected to the bottom end of the outer wheel rim laser rangefinder connecting rod, and the top end of the outer wheel rim laser rangefinder connecting rod is connected to the outer wheel rim laser rangefinder connecting rod positioner through the outer wheel rim laser rangefinder connecting rod limiter; the center points of the outer wheel rim laser rangefinder connecting rod limiter, the outer wheel rim laser rangefinder connecting rod and the outer wheel rim laser rangefinder connecting rod positioner are collinear.

6. The thermal reverse mechanical correction and detection device according to claim 5, characterized in that: The hot reverse mechanical correction and detection unit also includes a support rod, a support rod positioner and a support rod connecting frame; The support rod connecting frame is located between the hot reverse mechanical correction rotary rod connecting rod and the hot reverse mechanical correction rotary rod connecting rod positioner; the bottom of the support rod is connected to the casting platform in the metal mold low-pressure casting unit, and the top of the support rod is connected to the support rod connecting frame; the support rod positioner is arranged on the support rod; the center points of the support rod connecting frame, the hot reverse mechanical correction rotary rod connecting rod and the hot reverse mechanical correction rotary rod connecting rod positioner are collinear.

7. A method for hot reverse mechanical correction and detection of aluminum alloy wheel hubs for new energy vehicles, the method is based on the hot reverse mechanical correction and detection device for aluminum alloy wheel hubs for new energy vehicles according to claim 6, the method comprising the following steps: (i) injecting an aluminum alloy melt into a casting cavity of an aluminum alloy wheel hub composed of a left box mold, a right box mold, a front box mold, a rear box mold, a metal core and a top box mold to prepare an aluminum alloy wheel hub; (ii) After the low-pressure casting of the aluminum alloy wheel hub metal mold is completed, the left box mold, the right box mold, the front box mold and the rear box mold are pushed outward along the center direction of the metal core; and the top box mold is pushed upward in the vertical direction; (iii) adjusting the inner wheel rim laser distance meter to the edge of the inner wheel rim of the aluminum alloy wheel hub, and adjusting the outer wheel rim laser distance meter to the edge of the outer wheel rim of the aluminum alloy wheel hub; Turn on the transmission unit to drive the aluminum alloy wheel hub to rotate; The inner rim laser rangefinder is turned on to perform laser ranging on the inner rim of the aluminum alloy wheel hub, and the outer rim laser rangefinder is turned on to perform laser ranging on the outer rim of the aluminum alloy wheel hub. According to the laser ranging results, a hot reverse mechanical correction rod is used to apply an inward or outward torque along the center direction to the rotating aluminum alloy wheel hub, thereby realizing hot reverse mechanical correction and detection of the aluminum alloy wheel hub.

8. The method according to claim 7, characterized in that In step (i), the casting cavity of the aluminum alloy wheel hub is prepared by the following method: Start the left box mold displacer, the right box mold displacer, the front box mold displacer and the rear box mold displacer to push the left box mold, the right box mold, the front box mold and the rear box mold to move toward the center of the metal core; Start the support rod positioner to push the top box mold to move downward in the vertical direction; The left box mold, the right box mold, the front box mold, the rear box mold, the metal core and the top box mold constitute the casting cavity of the aluminum alloy wheel hub; Step (ii) specifically includes the following steps: Start the left box mold displacer, the right box mold displacer, the front box mold displacer and the rear box mold displacer to push the left box mold, the right box mold, the front box mold and the rear box mold to move outward along the center direction of the metal core; Start the support rod positioner to push the top box mold upward in the vertical direction; In step (iii), the inner wheel rim laser distance meter connecting rod positioner is started to adjust the inner wheel rim laser distance meter to a height distance between the inner wheel rim laser distance meter and the edge of the inner wheel rim of the aluminum alloy wheel hub of 15 mm to 35 mm; In step (iii), the outer wheel rim laser distance meter connecting rod positioner is started to adjust the outer wheel rim laser distance meter to a height distance between the outer wheel rim laser distance meter and the edge of the outer wheel rim of the aluminum alloy wheel hub of 15 mm to 35 mm; In step (iii), the gear drive motor in the transmission unit is turned on, and the gear is driven by the gear drive motor speed rod to rotate the gear, the gear drives the transmission gear to rotate, and the transmission gear drives the aluminum alloy wheel hub to rotate.

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