Method for machining a hub blank into a wheel hub

Abstract

The application relates to a method for processing a hub blank into a hub. The method comprises the following steps: obtaining a three-dimensional model of the hub; constructing a plurality of straight cylindrical surfaces coaxially surrounding a central axis of the three-dimensional model and being radially spaced apart along the three-dimensional model, wherein the straight cylindrical surfaces intersect the three-dimensional model; selecting a part intersecting the straight cylindrical surfaces from the three-dimensional model to obtain an intersection set; constructing a plurality of virtual planes perpendicular to the central axis of the three-dimensional model and being spaced apart from each other; determining a virtual machining path of the hub blank according to the intersection set and the plurality of virtual planes; determining a machining path of the hub blank according to the virtual machining path and position coordinates of the hub blank; and machining the hub blank along the machining path. The method can be applied to machining different hubs, and a corresponding design machining program need not be designed for each customized hub, thereby saving design time and improving the production efficiency of the customized hub.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wheel hubs, and in particular to a method for processing a wheel hub blank into a wheel hub. BACKGROUND

[0002] In related technologies, wheel hubs are usually produced by molds, and the cost of molds is high, which is not suitable for small-batch and customized wheel hubs. For small-batch and customized wheel hubs, a spinning combined with machining process is usually adopted.

[0003] However, in the machining process after the spinning process, the machining program needs to be designed one by one for the customized wheel hub, which will consume a lot of time and greatly reduce the efficiency of customized production of wheel hubs. SUMMARY

[0004] Therefore, it is necessary to provide a method for processing a wheel hub blank into a wheel hub in view of the problem that the machining program needs to be designed one by one for the customized wheel hub, which reduces the efficiency of customized production of wheel hubs.

[0005] According to an aspect of the present application, a method for processing a wheel hub blank into a wheel hub is provided, comprising:

[0006] obtaining a three-dimensional model of a wheel hub;

[0007] constructing a plurality of straight cylindrical surfaces which are coaxially arranged around a central axis of the three-dimensional model and are spaced along a radial direction of the three-dimensional model, wherein the straight cylindrical surfaces intersect the three-dimensional model;

[0008] selecting parts intersecting the straight cylindrical surfaces from the three-dimensional model to obtain an intersection set;

[0009] constructing a plurality of virtual planes which are perpendicular to the central axis of the three-dimensional model and are spaced from each other;

[0010] determining a virtual machining path of the wheel hub blank according to the intersection set and the plurality of virtual planes;

[0011] determining a machining path of the wheel hub blank according to the virtual machining path and a position coordinate of the wheel hub blank;

[0012] machining the wheel hub blank along the machining path.

[0013] In one embodiment, the intersection set includes a plurality of intersecting sections which are independent of each other, and the determining of the virtual machining path of the wheel hub blank according to the intersection set and the plurality of virtual planes specifically comprises:

[0014] a plurality of the straight cylindrical surfaces intersect a plurality of the virtual planes to form a plurality of virtual circular curves;

[0015] removing portions of the plurality of the virtual circular curves that are located within the intersecting cross sections to obtain a first virtual machining path.

[0016] In one of the embodiments, the intersecting set further comprises continuous cross sections, and the determining the virtual machining path of the hub blank according to the intersecting set and the plurality of virtual planes further comprises:

[0017] removing portions of the plurality of the virtual circular curves that are located within the continuous cross sections to obtain a second virtual machining path.

[0018] In one of the embodiments, the determining the virtual machining path of the hub blank according to the intersecting set and the plurality of virtual planes further comprises:

[0019] connecting the plurality of the first virtual machining paths end to end and connecting the plurality of the second virtual machining paths end to end, and connecting the first virtual machining path and the second virtual machining path end to end in two adjacent straight cylindrical surfaces to obtain the virtual machining path.

[0020] In one of the embodiments, the determining the machining path of the hub blank according to the virtual machining path and the position coordinates of the hub blank specifically comprises:

[0021] establishing a three-dimensional coordinate system on the three-dimensional model with the hub blank as a reference;

[0022] obtaining a set of position coordinates corresponding to the virtual machining path to obtain the machining path of the hub blank.

[0023] In one of the embodiments, the machining the hub blank along the machining path comprises:

[0024] determining a machining width of the hub blank according to a first spacing between two adjacent straight cylindrical surfaces;

[0025] determining a machining depth of the hub blank according to a second spacing between two adjacent virtual planes;

[0026] selecting a tool with a suitable diameter and a suitable tool edge length according to the first spacing and the second spacing;

[0027] controlling the tool to machine along the machining path.

[0028] In one of the embodiments, the diameter of the tool is greater than or equal to the first spacing.

[0029] In one of the embodiments, the number of the straight cylindrical surfaces is determined according to the outer diameter of the hub blank and the first interval.

[0030] In one of the embodiments, the length of the cutting edge of the tool is greater than or equal to the second interval.

[0031] In one of the embodiments, the number of the virtual planes is determined according to the height of the hub blank and the second interval.

[0032] In the method for machining the hub blank into the hub, the three-dimensional model of the hub is the same as the structure of the customized hub, then the intersection set obtained by selecting the part intersecting with the straight cylindrical surface from the three-dimensional model is equivalent to dividing the three-dimensional model into multiple parts, further, the virtual machining path determined according to the intersection set and the multiple virtual planes is equivalent to the corresponding virtual machining path constructed for the profile of the three-dimensional model, based on which, the machining path of the hub blank determined according to the virtual machining path and the position coordinates of the hub blank is the machining path for the profile of the customized hub, thus, machining the hub blank along the machining path can obtain the corresponding customized hub. The method for machining the hub blank into the hub can be applied to machining different hubs, without designing the corresponding machining program for each customized hub, which can save the design time and improve the production efficiency of the customized hub. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A flowchart of the method for machining the hub blank into the hub in one of the embodiments of the present application;

[0034] Figure 2 A schematic diagram of the three-dimensional model in one of the embodiments of the present application;

[0035] Figure 3 A schematic diagram of the three-dimensional model, the straight cylindrical surface and the virtual plane in one of the embodiments of the present application;

[0036] Figure 4 A schematic diagram of the three-dimensional model and the straight cylindrical surface in one of the embodiments of the present application;

[0037] Figure 5 A schematic diagram of the intersection section in one of the embodiments of the present application;

[0038] Figure 6 A schematic diagram of the intersection section and the virtual circular curve in one of the embodiments of the present application;

[0039] Figure 7 A schematic diagram of the formation process of the first virtual machining path in one of the embodiments of the present application;

[0040] Figure 8Fig. 2 is a schematic view of a continuous cross section in an embodiment of the present application;

[0041] Figure 9 Fig. 3 is a schematic view of a continuous cross section and a virtual circular curve in an embodiment of the present application;

[0042] Figure 10 Fig. 4 is a schematic view of a forming process of a second virtual machining path in an embodiment of the present application;

[0043] Figure 11 Fig. 5 is a schematic view of a forming process of a virtual machining path in an embodiment of the present application;

[0044] Figure 12 Fig. 6 is a schematic view of a flow of a method of machining a hub blank into a hub in another embodiment of the present application.

[0045] In the drawings: 210, three-dimensional model; 211, rib portion; 220, straight cylindrical surface; 230, virtual plane; 240, intersection set; 241, intersection cross section; 242, continuous cross section; 2421, upper boundary line; 250, virtual machining path; 251, first virtual machining path; 252, second virtual machining path; 260, virtual circular curve. DETAILED DESCRIPTION

[0046] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated that there are many alternate embodiments of the present application. In other instances, well-known methods associated with making and using the present application have not been described in detail in order to avoid unnecessarily obscuring the present application.

[0047] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely used for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0048] In addition, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance or a quantity of the indicated technical features. Thus, features with "first", "second" designations can include, explicitly or implicitly, at least one of such features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically defined.

[0049] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0051] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0052] Figure 1 The flowchart of the method for processing the hub blank into the hub in an embodiment of the present application is shown.

[0053] Please refer to Figure 1 , and in combination with Figure 2 and Figure 3 , the method for processing the hub blank into the hub provided by an embodiment of the present application comprises the following steps:

[0054] S110, obtaining a three-dimensional model 210 of the hub (such as Figure 2The three-dimensional model 210 of the wheel hub can be constructed according to the machining information of the customized wheel hub. The three-dimensional model 210 of the wheel hub can also be obtained according to the machining information of the wheel hub.

[0055] S120, a plurality of straight cylindrical surfaces 220 (as shown in FIG. 2B) are constructed coaxially around the central axis of the three-dimensional model 210 and are spaced along the radial direction of the three-dimensional model 210, wherein the straight cylindrical surfaces 220 intersect the three-dimensional model 210. Figure 3

[0056] S130, the part of the three-dimensional model 210 intersecting the straight cylindrical surfaces 220 is selected to obtain an intersection set 240 (as shown in FIG. 2C). Figure 4 Figure 5

[0057] S140, a plurality of virtual planes 230 perpendicular to the central axis of the three-dimensional model 210 and spaced from each other are constructed.

[0058] S150, according to the intersection set 240 and the plurality of virtual planes 230, a virtual machining path 250 of the wheel hub blank is determined.

[0059] S160, according to the virtual machining path 250 and the position coordinates of the wheel hub blank, a machining path of the wheel hub blank is determined.

[0060] S170, the wheel hub blank is machined along the machining path.

[0061] It can be understood that in the above method of machining the wheel hub blank into a wheel hub, the three-dimensional model 210 of the wheel hub is the same as the structure of the customized wheel hub, then the intersection set 240 obtained by selecting the part of the three-dimensional model 210 intersecting the straight cylindrical surfaces 220 is equivalent to dividing the three-dimensional model 210 into a plurality of parts, further, the virtual machining path 250 determined according to the intersection set 240 and the plurality of virtual planes 230 is equivalent to the corresponding virtual machining path 250 constructed for the contour of the three-dimensional model 210, based on this, the machining path of the wheel hub blank determined according to the virtual machining path 250 and the position coordinates of the wheel hub blank is the machining path for the contour of the customized wheel hub, thus, the wheel hub blank is machined along the machining path, and the corresponding customized wheel hub, i.e., the wheel hub corresponding to the three-dimensional model 210 as shown in FIG. 2D, can be obtained. The method of machining the wheel hub blank into a wheel hub can be applied to machining different wheel hubs, without the need to design a corresponding machining program for each customized wheel hub, which can save design time and improve the production efficiency of the customized wheel hub. Figure 2

[0062] In some embodiments, please refer to Figure 5 , Figure 6 and Figure 7 ​​​​The intersection set 240 includes a plurality of intersection sections 241 independent of each other, and the virtual machining path 250 of the hub blank is determined according to the intersection set 240 and the plurality of virtual planes 230, and specifically includes:

[0063] The plurality of straight cylindrical surfaces 220 intersect with the plurality of virtual planes 230 to form a plurality of virtual circular curves 260. Specifically, in the embodiment as shown in Figure 6 , the plurality of virtual circular curves 260 all intersect at the intersection section 241.

[0064] Referring to Figure 7 , the portions of the plurality of virtual circular curves 260 located in the intersection section 241 are removed to obtain a first virtual machining path 251. Specifically, in the embodiments as shown in Figure 6 and Figure 7 , in order to better highlight the first virtual machining path 251, the first virtual machining path 251 is shown in dashed lines in Figure 7 .

[0065] The intersection section 241 is located at the rib portion 211 of the three-dimensional model 210, which corresponds to the rib portion of the hub. It can be understood that the first virtual machining path 251 obtained according to the intersection section 241 and the plurality of virtual circular curves 260 is a machining path designed according to the profile of the hub, and thus the machining path of the hub blank determined according to the first virtual machining path 251 can be machined according to the profile of the hub required, thereby obtaining a corresponding customized hub.

[0066] In some embodiments, referring to Figure 8 , Figure 9 and Figure 10 , the intersection set 240 further includes a continuous section 242, and the virtual machining path 250 of the hub blank determined according to the intersection set 240 and the plurality of virtual planes 230 further includes:

[0067] The portions of the plurality of virtual circular curves 260 located in the continuous section 242 are removed to obtain a second virtual machining path 252.

[0068] The continuous section 242 corresponds to another portion of the hub. It can be understood that the second virtual machining path 252 obtained according to the continuous section 242 and the plurality of virtual circular curves 260 is a machining path designed according to the profile of the hub, and thus the machining path of the hub blank determined according to the second virtual machining path 252 can be machined according to the profile of the hub required, thereby obtaining a corresponding customized hub.

[0069] It should be noted that Figure 10 , in order to better highlight the second virtual machining path 252, the second virtual machining path 252 is shown in dashed lines inFigure 10 The intersection set 240 is shown by a dashed line.

[0070] It should be noted that after the hub body is processed by the method for processing the hub body into the hub, the finishing machining path of the hub body can be determined according to the position coordinate set of the upper boundary line 2421 of the continuous section 242, so as to finish machining the hub body.

[0071] In some embodiments, referring to Figure 11 According to the intersection set 240 and the plurality of virtual planes 230, the virtual machining path 250 of the hub body further comprises:

[0072] The plurality of first virtual machining paths 251 are connected in sequence, and the plurality of second virtual machining paths are connected in sequence, and the first virtual machining path 251 and the second virtual machining path in the adjacent two straight cylindrical surfaces 220 are connected in sequence, so as to obtain the virtual machining path 250.

[0073] Figure 11 The plurality of first virtual machining paths 251 are connected in sequence, and the plurality of second virtual machining paths are connected in sequence, and the first virtual machining path 251 and the second virtual machining path in the adjacent two straight cylindrical surfaces 220 are connected in sequence, so as to obtain the virtual machining path 250.

[0074] In some embodiments, according to the virtual machining path 250 and the position coordinates of the hub body, the machining path of the hub body comprises:

[0075] A three-dimensional coordinate system is established on the three-dimensional model 210 with the hub body as a reference,

[0076] The position coordinate set corresponding to the virtual machining path 250 is obtained, and the machining path of the hub body is obtained.

[0077] That is, the three-dimensional coordinate system is established on the three-dimensional model 210 with the position coordinates of the hub body as a reference. Specifically, the outer periphery of the hub body does not need to be processed by the method of the application. The three-dimensional coordinate system is established on the three-dimensional model 210 corresponding to the part of the outer periphery of the hub body. It can be understood that the virtual machining path 250 is obtained according to the three-dimensional model 210. Thus, according to the three-dimensional coordinate system, the position coordinate set corresponding to the virtual machining path 250 can be obtained, and then the machining path of the hub body can be obtained, and the hub body can be processed according to the machining path.

[0078] In some embodiments, referring to Figure 4 and Figure 6The specific machining of the wheel hub blank along the machining path includes:

[0079] The machining width of the wheel hub blank is determined based on the first distance D between two adjacent straight cylindrical surfaces 220;

[0080] The machining depth of the wheel hub blank is determined based on the second distance H between two adjacent virtual planes 230;

[0081] Select a tool with a suitable diameter and a suitable cutting edge length based on the first and second spacings;

[0082] Control the cutting tool to perform machining along the machining path.

[0083] Understandably, specifically in the case of... Figure 11 In the illustrated embodiment, each first virtual machining path 251 is obtained from a corresponding virtual circular curve 260. The distance between adjacent virtual circular curves 260 is equal to the first distance D. Therefore, the distance between two adjacent first virtual machining paths 251 is also equal to the first distance D. Selecting a tool with a suitable diameter according to this first distance D helps improve the machining accuracy of the wheel hub blank in its radial direction. Similarly, selecting a tool with a suitable cutting edge length according to the second distance H helps improve the machining accuracy of the wheel hub blank in its axial direction. In this way, the machining accuracy of the wheel hub blank can be improved.

[0084] The cutting tools can be flat end mills, ball end mills, or conical end mills. Specifically, the appropriate cutting tool can be selected according to the actual machining needs.

[0085] In some embodiments, the diameter of the tool is equal to the first spacing D. It is understood that before constructing the plurality of straight cylindrical surfaces 220, the spacing between two adjacent straight cylindrical surfaces 220 can be made equal to the diameter of the tool, that is, the first spacing D is made equal to the diameter of the tool, in order to ensure the machining accuracy of the hub blank in its radial direction.

[0086] In other embodiments, the diameter of the tool is greater than the first spacing D. It is understood that before constructing the plurality of straight cylindrical surfaces 220, the first spacing D can be made slightly smaller than the diameter of the tool based on the tool diameter data, which can avoid affecting the working conditions of the tool due to the milling depth being greater than the diameter of the tool.

[0087] In some embodiments, the number of straight cylindrical surfaces 220 is determined based on the outer diameter of the wheel hub blank and the first spacing D, so as to ensure a more comprehensive and accurate acquisition of the machining path of the wheel hub blank, which is beneficial to improving the machining accuracy of the wheel hub blank.

[0088] In some embodiments, the length of the cutting edge of the tool is equal to the second interval. It can be understood that, before the plurality of virtual planes 230 is constructed, the interval between two adjacent virtual planes 230 can be made equal to the length of the cutting edge of the tool according to the length data of the cutting edge of the tool, that is, the second interval H is equal to the length of the cutting edge of the tool, so as to ensure the machining accuracy of the hub blank in the axial direction thereof.

[0089] In other embodiments, the length of the cutting edge of the tool is greater than the second interval. It can be understood that, before the plurality of virtual planes 230 is constructed, the interval between two adjacent virtual planes 230 can be made slightly smaller than the length of the cutting edge of the tool according to the length data of the cutting edge of the tool, that is, the second interval H is slightly smaller than the length of the cutting edge of the tool, so as to avoid the participation of the tool shank in the cutting process when the tool is fed downward, and improve the reliability of the method.

[0090] In some embodiments, the number of virtual planes 230 is determined according to the height of the hub blank and the second interval H, so as to more comprehensively and accurately obtain the machining path of the hub blank, and facilitate the improvement of the machining accuracy of the hub blank.

[0091] In some embodiments, the method for machining the hub blank into a hub comprises the following steps:

[0092] S110, as shown in Figure 2 , a three-dimensional model 210 of the hub is obtained.

[0093] S120, as shown in Figure 3 , a plurality of straight cylindrical surfaces 220 are constructed coaxially around the central axis of the three-dimensional model 210 and are arranged at intervals along the radial direction of the three-dimensional model 210, wherein the straight cylindrical surfaces 220 intersect the three-dimensional model 210.

[0094] S130, as shown in Figure 5 and Figure 8 , a part intersecting the straight cylindrical surfaces 220 is selected from the three-dimensional model 210 to obtain an intersection set 240. The intersection set 240 includes a plurality of independent intersection sections 241, and the intersection set 240 also includes a continuous section 242.

[0095] S140, as shown in Figure 3 , a plurality of virtual planes 230 are constructed perpendicular to the central axis of the three-dimensional model 210 and are spaced apart from each other.

[0096] S150, as shown in Figure 7 and Figure 10 , a virtual machining path 250 of the hub blank is determined according to the intersection set 240 and the plurality of virtual planes 230.

[0097] S160, determining a machining path of the hub blank according to the virtual machining path 250 and the position coordinates of the hub blank.

[0098] S171, determining a machining width of the hub blank according to the first interval D between the two adjacent straight cylindrical surfaces 220;

[0099] S172, determining a machining depth of the hub blank according to the second interval H between the two adjacent virtual planes 230;

[0100] S173, selecting a tool with a proper diameter and a proper tool edge length according to the first interval and the second interval;

[0101] S174, controlling the tool to machine along the machining path. Specifically, controlling the tool to mill along the machining path.

[0102] It can be understood that the method of machining the hub blank into the hub can be applied to machining different hubs, without designing a corresponding design machining program for each customized hub, so that the design time can be saved and the production efficiency of the customized hub can be improved.

[0103] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0104] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A method of machining a wheel hub blank into a wheel hub, characterized in that, The method comprises the following steps: acquiring a three-dimensional model of a wheel hub (210); constructing a plurality of straight cylindrical surfaces (220) coaxially surrounding a central axis of the three-dimensional model (210) and being radially spaced apart along the three-dimensional model (210), wherein the straight cylindrical surfaces (220) intersect the three-dimensional model (210); selecting, from the three-dimensional model (210), portions intersecting the straight cylindrical surfaces (220) to obtain an intersection set (240), the intersection set (240) comprising a plurality of independent intersection sections (241); constructing a plurality of virtual planes (230) perpendicular to the central axis of the three-dimensional model (210) and being spaced apart from each other; determining a virtual machining path (250) of the wheel hub embryo according to the intersection set (240) and the plurality of virtual planes (230); determining a machining path of the wheel hub embryo according to the virtual machining path (250) and position coordinates of the wheel hub embryo; machining the wheel hub embryo along the machining path.

2. The method of machining a wheel hub blank into a wheel hub according to claim 1, characterized in that The step of determining the virtual machining path (250) of the wheel hub embryo according to the intersection set (240) and the plurality of virtual planes (230) specifically comprises the following steps: the plurality of straight cylindrical surfaces (220) intersect the plurality of virtual planes (230) to form a plurality of virtual circular curves (260); removing portions of the plurality of virtual circular curves (260) located in the intersection sections (241) to obtain a first virtual machining path (251).

3. The method of machining a wheel hub blank into a wheel hub according to claim 2, characterized in that The intersection set (240) further comprises a continuous section (242), and the step of determining the virtual machining path (250) of the wheel hub embryo according to the intersection set (240) and the plurality of virtual planes (230) further comprises the following step: removing portions of the plurality of virtual circular curves (260) located in the continuous section (242) to obtain a second virtual machining path (252).

4. The method of machining a wheel hub blank into a wheel hub according to claim 3, characterized in that The step of determining the virtual machining path (250) of the wheel hub embryo according to the intersection set (240) and the plurality of virtual planes (230) further comprises the following step: connecting the plurality of first virtual machining paths (251) end to end, connecting the plurality of second virtual machining paths (252) end to end, and connecting the first virtual machining path (251) and the second virtual machining path (252) end to end in two adjacent straight cylindrical surfaces (220) to obtain the virtual machining path (250).

5. The method of machining a wheel hub blank into a wheel hub according to claim 1, characterized in that The step of determining the machining path of the wheel hub embryo according to the virtual machining path (250) and the position coordinates of the wheel hub embryo specifically comprises the following steps: establishing a three-dimensional coordinate system on the three-dimensional model (210) with the wheel hub embryo as a reference; acquiring a position coordinate set corresponding to the virtual machining path (250) to obtain the machining path of the wheel hub embryo.

6. The method of machining a wheel hub blank into a wheel hub according to claim 1, characterized in that The step of machining the wheel hub embryo along the machining path comprises the following steps: determining a machining width of the wheel hub embryo according to a first spacing between two adjacent straight cylindrical surfaces (220); determine a machining depth of the hub blank according to a second interval between two adjacent virtual planes (230); select a tool with a proper diameter and a proper tool edge length according to the first interval and the second interval; control the tool to machine along the machining path.

7. The method of machining a wheel hub blank into a wheel hub according to claim 6, characterized in that The diameter of the tool is greater than or equal to the first interval.

8. The method of machining a wheel hub blank into a wheel hub according to claim 7, characterized in that determine the number of the straight cylindrical surfaces (220) according to the outer diameter of the hub blank and the first interval.

9. The method of machining a wheel hub blank into a wheel hub according to claim 6, characterized in that The tool edge length of the tool is greater than or equal to the second interval.

10. The method of machining a wheel hub blank into a wheel hub according to claim 9, characterized in that determine the number of the virtual planes (230) according to the height of the hub blank and the second interval.

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