A method for manufacturing steel wheel spokes for pickup trucks

Abstract

This invention relates to a method for manufacturing steel wheel spokes for pickup trucks, comprising: a forming process: pressing a preliminary spoke sample using a forming device to obtain a spoke body, on which a protrusion protruding outwards is formed; a trimming process: during the trimming of the outer periphery of the spoke body, a center process hole is punched at the center, the center process hole being coaxial with the spoke body; a flanging process: a boss is pre-flanged at the center process hole, the boss being aligned with the protrusion; and a punching process: using a punching die, a center hole and bolt holes are punched into the flanged spoke body to obtain the spokes. The manufacturing method for steel wheel spokes for pickup trucks provided by this invention not only ensures the guidance and positioning stability of the spokes, but also guarantees the concentricity and radial runout of the bolt holes and center holes without adding any processes, reducing the average radial runout of the spokes, increasing the first-pass yield, and thus improving the manufacturing efficiency of steel wheel spokes for pickup trucks.

Description

Technical Field

[0001] This invention relates to the field of automobile wheel manufacturing, and more specifically to a method for manufacturing the spokes of a steel pickup truck wheel. Background Technology

[0002] A wheel is constructed by welding together a rim and spokes. A tire is inflated and fitted onto the rim, while the spokes are mounted on the front and rear axles. The spokes are crucial load-bearing components of the vehicle, bearing the vehicle's vertical loads, lateral forces, driving torque, and various stresses generated during driving. Therefore, the design and manufacturing of wheel spokes require high standards, and the manufacturing process is one of the key factors ensuring the performance of the wheel spokes.

[0003] Pickup trucks are used in a wide range of scenarios with harsh operating conditions, resulting in high load-bearing capacity. The front and rear axles, which bear the weight of the entire vehicle, are larger than those in passenger cars. Therefore, the requirements for wheel spoke manufacturing are relatively more stringent. Existing processes for punching holes after trimming pickup truck wheel spokes mainly fall into two categories: one is punching the spokes together with the trimming process, a simpler process with fewer steps, but its disadvantage is that the center hole size deforms significantly in subsequent processes, leading to poor spoke diameter runout; the other is punching the center hole separately after completing the process holes, ensuring the center hole size, but the transition process causes dimensional deviations, resulting in a larger spoke diameter runout. Both of these methods suffer from the drawback of large spoke diameter runout. After the rim and spokes are welded together, the diameter runout further increases, reducing the first-pass yield rate. Furthermore, a large wheel diameter runout affects the overall vehicle comfort and makes the product less competitive. Summary of the Invention

[0004] Based on the above description, the present invention provides a method for manufacturing steel wheel spokes for pickup trucks to solve the problem of excessively large spoke diameter jump values ​​in the prior art.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] A method for manufacturing steel wheel spokes for pickup trucks, comprising:

[0007] Molding process: The initial sample of the wheel spoke is pressed and molded using a molding device to obtain the wheel spoke body, wherein a protrusion protruding outward from the wheel spoke body is formed on the wheel spoke body;

[0008] Trimming process: When trimming the outer edge of the spoke body, a central process hole is punched at the center, wherein the central process hole is coaxial with the spoke body;

[0009] Flanging process: The central process hole is pre-flanged with a boss, the boss and the protrusion are arranged in the same direction;

[0010] Punching process: Using a punching die, center holes and bolt holes are punched into the flanged spoke body to obtain the spokes.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, prior to the molding process, the following steps are also included:

[0013] Stretching process: The spoke blank is stretched for the first time. After the first stretching, a second stretching is performed according to the spoke shape requirements to obtain the stretched spoke prototype.

[0014] Furthermore, prior to the stretching process, the following steps are also included:

[0015] Blanking process: Blanking is performed using a blanking machine to obtain the spoke blank.

[0016] Furthermore, the molding device includes: a base, a positioning element, and a molding body;

[0017] The upper surface of the base and the lower surface of the molded body have approximately the same shape as the outer and inner surfaces of the wheel spoke prototype, respectively, to construct an accommodating space that fits the wheel spoke prototype; a positioning element is provided on the base for positioning the molded body.

[0018] Furthermore, the punching die includes an upper die mechanism and a lower die mechanism;

[0019] The upper die mechanism and the lower die mechanism are arranged opposite to each other. Before the punching process, the flanged spoke body is placed on the lower die mechanism, and the upper die mechanism applies pressure to the flanged spoke body to obtain the center hole and the bolt hole.

[0020] Furthermore, the upper mold mechanism includes: a bolt hole punch, a center hole punch, a stripper plate, a punch fixing plate, and an upper mold base;

[0021] The punch fixing plate is located on the side of the upper die base facing the lower die mechanism. The bolt hole punch and the center hole punch are both located on the side of the punch fixing plate away from the upper die base. The central axis of the center hole punch is located at the central axis of the punching die. The side of the center hole punch away from the punch fixing plate is provided with a clearance groove, which is used to avoid the boss.

[0022] The ejector plate is connected to the side of the upper die holder facing the lower die mechanism and is located around the punch fixing plate. The outer contour of the ejector plate is adapted to the shape of the protrusion of the spoke body.

[0023] Furthermore, the upper mold mechanism also includes a guide pin;

[0024] The guide pin is connected to the side of the center hole punch away from the punch fixing plate, and the guide pin is coaxially arranged with the center hole punch; during the punching process, the outer diameter of the guide pin is not less than the inner diameter of the boss, so as to position and guide the wheel spokes.

[0025] Furthermore, the lower mold mechanism includes: a bolt hole die, a center hole die, a die fixing plate, and a lower mold base;

[0026] The die fixing plate is located on the side of the lower die base facing the upper die mechanism. The bolt hole die and the center hole die are both located on the side of the die fixing plate away from the lower die base. The bolt hole die has a first cavity that matches the bolt hole punch, and the center hole die has a second cavity that matches the center hole punch.

[0027] Furthermore, the punching die also includes a control device, which is electrically connected to the upper die mechanism and is used to control the upper die mechanism to move toward or away from the lower die mechanism.

[0028] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0029] The manufacturing method for steel wheel spokes of pickup trucks provided by this invention includes a forming process, a trimming process, a flanging process, and a punching process. In the trimming process, a central process hole is punched at the center of the spoke body, and the central process hole is trimmed to obtain a small central hole coaxial with the spoke body. Then, in the flanging process, this small central hole is flanged to obtain a boss. The boss is concentric with the outer diameter of the spoke. Through the cooperation between the boss and the punching die, the spoke is positioned and guided. Furthermore, the pre-flanged central hole enhances the rigidity of the central hole, acting like a reinforcing rib, making the central hole less prone to deformation. In the punching process, the pre-flanged central process hole is used for guidance. The punching die is used to punch the large central hole and the bolt hole together, further reducing the concentricity error between the central hole and the outer diameter of the spoke, ensuring the concentricity and radial runout of the bolt hole and the central hole. The manufacturing method for pickup truck steel wheel spokes provided by this invention utilizes trimming and flanging processes to ensure the guiding and positioning stability of the spokes during the punching process. Simultaneously, the punching process simultaneously punches the bolt holes and center holes, further ensuring their concentricity and radial runout. Without adding any processes, this reduces the average radial runout of the spokes, increases the first-pass yield, and thus improves the manufacturing efficiency of pickup truck steel wheel spokes. Attached Figure Description

[0030] Figure 1 A schematic diagram of the wheel assembly provided in an embodiment of the present invention;

[0031] Figure 2 A schematic diagram illustrating a method for manufacturing steel wheel spokes for pickup trucks according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the manufacturing method of the steel wheel spokes of a pickup truck provided in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the punching die in an embodiment of the present invention;

[0034] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Spoke; 11. Spoke body; 111. Boss; 12. Center hole; 13. Bolt hole;

[0037] 2. Wheel rim;

[0038] 3. Punching die; 31. Upper die mechanism; 311. Bolt hole punch; 312. Center hole punch; 3121. Clearance groove; 313. Punch fixing plate; 314. Upper die base; 315. Ejector plate; 316. Guide pin; 32. Lower die mechanism; 321. Center hole die; 322. Bolt hole die; 323. Die fixing plate; 324. Lower die base. Detailed Implementation

[0039] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0041] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0044] In embodiments of the present invention, unless otherwise explicitly specified and limited, the first feature being "on" or "under" the second feature may be in direct contact with the first feature, or indirect contact between the first and second features through an intermediate medium.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0047] like Figures 1 to 5 As shown, this embodiment of the invention provides a method for manufacturing the spokes 1 of a steel pickup truck wheel, comprising:

[0048] Step S1, Molding process: The initial sample of the wheel spoke is pressed and molded using a molding device to obtain the wheel spoke body 11, wherein a protrusion protruding outward from the wheel spoke 1 is formed on the wheel spoke body 11.

[0049] Step S2, trimming process: When trimming the outer periphery of the spoke body 11, punch a central process hole at the center and trim the central process hole. The central process hole is coaxial with the spoke body 11.

[0050] Step S3, Flanging process: Flanging the boss 111 of the center process hole, with the boss 111 and the protrusion facing the same direction.

[0051] Step S4, punching process: using the punching die 3 to punch the center hole 12 and bolt hole 13 on the flanged spoke body 11 to obtain the spoke 1.

[0052] Specifically, such as Figure 1 As shown, the wheel assembly is welded from the rim 2 and the spokes 1. The outer diameter of the spokes 1 is welded to the groove bottom of the rim 2 after interference fit. The concentricity of the spoke center hole 12 and the outer diameter of the spokes 1 directly affects the radial runout of the combined assembly.

[0053] like Figure 2 As shown, the initial sample of the spoke 1 is first pressed and formed using a forming device to obtain the spoke body 11. Then, a center process hole is punched in the trimming of the spoke 1. Furthermore, a pre-flanged boss 111 is designed in the flanging process to form a small center hole, thereby ensuring the concentricity of the small center hole with the straight end of the spoke 1.

[0054] The pre-turned boss 111 not only enhances the rigidity of the center hole 12, similar to a reinforcing rib, making the small center hole less prone to deformation, but also plays an effective and reliable guiding role in subsequent processes. The pre-turned center hole boss is formed together with the outer diameter of the wheel spoke 1 to ensure concentricity.

[0055] Finally, in the punching process, the bolt hole 13 and the center hole 12 can be punched in one go using the punching die 3. During punching, the pre-flipped small center hole is used for guidance to complete the punching of the center hole 12 and the bolt hole 13. The positional error of the bolt hole 13 relative to the center hole 12 is less than 0.1mm, the radial runout of the spoke 1 can be reduced by more than 0.4mm, the first-pass yield is greater than 99%, the amount of rework is reduced, and the product performance and quality are improved.

[0056] It should be noted that in the prior art, the bolt hole 13 and the center hole 12 are usually not in the same process and need to be switched. During the switching process, there will inevitably be multiple positioning errors. Moreover, the effect of using the shape of the bolt hole punch 311 or the outer diameter of the spoke 1 for guidance is not as good as the small center hole formed by the pre-flipped boss 111 mentioned in the embodiment of the present invention.

[0057] The manufacturing method of steel wheel spokes for pickup trucks provided by this invention includes a forming process, a trimming process, a flanging process, and a punching process. In the trimming process, a central process hole is punched at the center of the spoke body 11, and the central process hole is trimmed to obtain a small central hole coaxial with the spoke body 11. Then, in the flanging process, this small central hole is flanged to obtain a boss 111. The boss 111 is concentric with the outer diameter of the spoke 1. Through the cooperation between the boss 111 and the punching die 3, the spoke 1 is positioned and guided. Furthermore, the pre-flanged central hole 12 enhances the rigidity of the central hole 12, similar to a reinforcing rib, making the central hole 12 less prone to deformation. In the punching process, the pre-flanged central process hole is used for guidance. The punching die 3 is used to punch the large central hole and the bolt hole 13 together, which further reduces the concentricity error between the central hole and the outer diameter of the spoke 1, ensuring the concentricity and radial runout of the bolt hole 13 and the central hole 12. The manufacturing method of pickup truck steel wheel spokes 1 provided by the present invention utilizes the trimming and flanging processes to ensure the guiding and positioning stability of spokes 1 during the punching process. At the same time, the punching process allows the bolt holes 13 and the center hole 12 to be punched together, further ensuring the concentricity and radial runout of the bolt holes 13 and the center hole 12. Without increasing the number of processes, the average radial runout of spokes 1 is reduced, the first-pass yield is increased, and the manufacturing efficiency of pickup truck steel wheel spokes 1 is improved.

[0058] In an optional embodiment, prior to the molding process, the following is further included:

[0059] Stretching process: The spoke blank is stretched for the first time. After the first stretching, a second stretching is performed according to the shape requirements of spoke 1 to obtain the initial sample of the stretched spoke.

[0060] Furthermore, prior to the stretching process, the following steps are also included:

[0061] Blanking process: Blanking is performed using a blanking machine to obtain wheel spoke blanks.

[0062] Specifically, such as Figure 3 As shown, the manufacturing process of the spoke 1 is as follows: blanking, stretching, reverse stretching, forming, trimming, flanging, and punching bolt holes 13 and center holes 12. After blanking, stretching and reverse stretching are used to obtain a preliminary spoke sample. Then, forming equipment is used to form it to obtain the spoke body 11. After trimming and flanging, a small center hole 12 boss 111 is obtained. Finally, the spoke body 11 is placed on the punching die 3 and punched to obtain the required spoke 1.

[0063] The height of the pre-flipped small center hole boss 111 is about 8-10mm. If the boss 111 is too short, the guiding effect in subsequent punching will be poor. If the pre-flipped boss 111 is too high, the space of the guide pin 316 on the punched center hole 12 will be limited and the material removal force will be difficult, which will cause the boss 111 to stick to the outer surface and not fall off, making it impossible to perform the next punching.

[0064] Furthermore, the molding device includes: a base, a positioning element, and a molding body.

[0065] The upper surface of the base and the lower surface of the molding body have approximately the same shape as the outer and inner surfaces of the wheel spoke prototype, respectively, to create an accommodating space that fits the wheel spoke prototype; a positioning element is provided on the base to position the molding body. By setting up the molding device, the initial molding of the wheel spoke can be effectively guaranteed.

[0066] In optional embodiments, such as Figure 4 As shown, the punching die 3 includes an upper die mechanism 31 and a lower die mechanism 32.

[0067] The upper die mechanism 31 and the lower die mechanism 32 are arranged opposite to each other. Before the punching process, the flanged spoke body 11 is placed on the lower die mechanism 32, and the upper die mechanism 31 applies pressure to the flanged spoke body 11 to obtain the center hole 12 and the bolt hole 13.

[0068] The upper mold mechanism 31 includes: bolt hole punch 311, center hole punch 312, ejector plate 315, punch fixing plate 313 and upper mold base 314.

[0069] Specifically, the punch fixing plate 313 is located on the side of the upper die base 314 facing the lower die mechanism 32. The bolt hole punch 311 and the center hole punch 312 are both located on the side of the punch fixing plate 313 away from the upper die base 314. The central axis of the center hole punch 312 is located at the central axis of the punching die 3, and, as... Figure 5 As shown, the central hole punch 312 has a relief groove 3121 on the side away from the punch fixing plate 313. The relief groove 3121 is used to avoid the boss 111.

[0070] The ejector plate 315 is connected to the side of the upper die holder 314 facing the lower die mechanism 32 and is located on the periphery of the punch fixing plate 313. The outer contour of the ejector plate 315 is adapted to the shape of the protrusion of the spoke body 11.

[0071] Specifically, in the process of punching bolt holes 13 and center holes 12, in order to reduce the deformation of spoke 1, a stripper plate 315 with a shape that matches the outer shape of spoke 1 is made to avoid the deformation of spoke 1 affecting radial runout. The stripper plate 315 is made of rigid material.

[0072] The upper die mechanism 31 also includes a guide pin 316, which is connected to the side of the central hole punch 312 away from the punch fixing plate 313. The guide pin 316 is coaxially arranged with the central hole punch 312. During the punching process, the outer diameter of the guide pin 316 is not less than the inner diameter of the boss 111, so as to position and guide the spoke 1.

[0073] The outer diameter of the guide pin 316 should not be excessively designed for guiding, otherwise the scrap material of the boss 111 will not be able to be removed. It is advisable that the outer diameter of the guide pin 316 is slightly larger than the inner diameter of the boss 111 by 0.02-0.03mm.

[0074] The lower mold mechanism 32 includes: bolt hole die 322, center hole die 321, die fixing plate 323 and lower mold base 324.

[0075] The die fixing plate 323 is located on the side of the lower die base 324 facing the upper die mechanism 31. The bolt hole die 322 and the center hole die 321 are both located on the side of the die fixing plate 323 away from the lower die base 324. The bolt hole die 322 is provided with a first cavity that matches the bolt hole punch 311, and the center hole die 321 is provided with a second cavity that matches the center hole punch 312.

[0076] It should be noted that, because the small center hole is pre-flipped in the flanging process, the center hole punch 312 for punching the center hole 12 is slightly higher than the punch during normal punching by the height of the pre-flipped center boss 111. That is, a relief groove 3121 is provided at the center of the center hole punch 312 to avoid the boss 111, so that the punched-off scrap of the pre-flipped small center hole boss 111 is lower than the plane of the center hole die 321. In addition, in the radial direction, there is a gap between the boss 111 and the inner wall of the relief groove 3121. The depth of the relief groove 3121 is higher than the height of the boss 111, completely avoiding the boss 111. This prevents the center hole punch 312 from contacting the pre-flipped boss 111, which would cause the center hole 12 to deform and become unguided. At the same time, it prevents the scrap of the boss 111 from getting stuck during punching, allowing the scrap of the boss 111 to fall off smoothly and ensuring the positioning of the next workpiece.

[0077] In an optional embodiment, the punching die 3 further includes a control device electrically connected to the upper die mechanism 31, which is used to control the upper die mechanism 31 to move toward or away from the lower die mechanism 32.

[0078] Specifically, the operation process of the punching die 3 provided in this embodiment of the invention is as follows: after the spoke 1 is positioned on the die cavity, the boss 111 and the guide pin 316 located in the center correct the spoke 1 so that the center hole 12 is located in the center position; under the action of the control device, the upper die mechanism 31 moves downward, the lower surface of the ejector plate 315 abuts against the upper surface of the spoke 1, and the bolt hole punch 311 and the center hole punch 312 punch the spoke 1 in succession; after the punching is completed, the upper die mechanism 31 moves upward, releases the spoke 1, and completes one punching.

[0079] The manufacturing method of pickup truck steel wheel spokes 1 provided in this embodiment of the invention reduces the average radial runout of spokes 1 without adding any processes, thereby improving the first-pass yield. During the trimming process, a center process hole is punched, and a small center hole 12 is pre-flipped during flanging. The pre-flipped center hole 12 is used in conjunction with the outer diameter of spokes 1 to ensure concentricity. When punching bolt holes 13, the pre-flipped center hole 12 is used for guidance, completing the punching of large holes and bolt holes 13. This reduces the radial runout of spokes 1 by more than 0.4 mm, resulting in a first-pass yield greater than 99%, reducing rework and improving product performance and quality. Furthermore, since bolt holes 13 and center holes 12 are punched together, the positional error of bolt holes 13 relative to center holes 12 is less than 0.1 mm, effectively improving the manufacturing efficiency of pickup truck wheel spokes 1.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing the spokes of a steel pickup truck wheel, characterized in that, include: Molding process: The initial sample of the wheel spoke is pressed and molded using a molding device to obtain the wheel spoke body, wherein a protrusion protruding outward from the wheel spoke body is formed on the wheel spoke body; Trimming process: When trimming the outer edge of the spoke body, a central process hole is punched at the center, wherein the central process hole is coaxial with the spoke body; Flanging process: The central process hole is pre-flanged with a boss, the boss and the protrusion are arranged in the same direction; Punching process: Using a punching die, center holes and bolt holes are punched into the flanged spoke body to obtain the spokes; The punching die includes an upper die mechanism and a lower die mechanism; The upper die mechanism and the lower die mechanism are arranged opposite to each other. Before the punching process, the flanged spoke body is placed on the lower die mechanism, and the upper die mechanism applies pressure to the flanged spoke body to obtain the center hole and the bolt hole. The upper mold mechanism includes: bolt hole punch, center hole punch, ejector plate, punch fixing plate and upper mold base; The punch fixing plate is located on the side of the upper die base facing the lower die mechanism. The bolt hole punch and the center hole punch are both located on the side of the punch fixing plate away from the upper die base. The central axis of the center hole punch is located at the central axis of the punching die. The side of the center hole punch away from the punch fixing plate is provided with a clearance groove, which is used to avoid the boss. The ejector plate is connected to the upper die holder on the side facing the lower die mechanism and is located around the punch fixing plate. The outer contour of the ejector plate is adapted to the shape of the protrusion of the spoke body. The upper mold mechanism also includes guide pins; The guide pin is connected to the side of the center hole punch away from the punch fixing plate, and the guide pin is coaxially arranged with the center hole punch; during the punching process, the outer diameter of the guide pin is not less than the inner diameter of the boss, so as to position and guide the wheel spokes.

2. The method for manufacturing the steel wheel spokes of a pickup truck according to claim 1, characterized in that, Prior to the molding process, the following is also included: Stretching process: The spoke blank is stretched for the first time. After the first stretching, a second stretching is performed according to the spoke shape requirements to obtain the stretched spoke prototype.

3. The method for manufacturing the steel wheel spokes of a pickup truck according to claim 2, characterized in that, Prior to the stretching process, the following is also included: Blanking process: Blanking is performed using a blanking machine to obtain the spoke blank.

4. The method for manufacturing the steel wheel spokes of a pickup truck according to claim 1, characterized in that, The molding device includes: a base, a positioning component, and a molding body; The upper surface of the base and the lower surface of the molded body have approximately the same shape as the outer and inner surfaces of the wheel spoke prototype, respectively, to construct an accommodating space that fits the wheel spoke prototype; a positioning element is provided on the base for positioning the molded body.

5. The method for manufacturing the steel wheel spokes of a pickup truck according to claim 1, characterized in that, The lower mold mechanism includes: bolt hole die, center hole die, die fixing plate and lower mold base; The die fixing plate is located on the side of the lower die base facing the upper die mechanism. The bolt hole die and the center hole die are both located on the side of the die fixing plate away from the lower die base. The bolt hole die has a first cavity that matches the bolt hole punch, and the center hole die has a second cavity that matches the center hole punch.

6. The method for manufacturing the steel wheel spokes of a pickup truck according to claim 1, characterized in that, The punching die also includes a control device, which is electrically connected to the upper die mechanism and is used to control the upper die mechanism to move toward or away from the lower die mechanism.

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