WO2023125732A1

WO2023125732A1 - Spoke and preparation method therefor

Info

Publication number: WO2023125732A1
Application number: PCT/CN2022/143048
Authority: WO
Inventors: 王富城; 汪冬冬; 屠文金; 汪康
Original assignee: 浙江金固股份有限公司
Priority date: 2021-12-30
Filing date: 2022-12-28
Publication date: 2023-07-06
Also published as: CN114309331A; CN114309331B

Abstract

The present application provides a spoke and a preparation method therefor, and relates to the technical field of spoke manufacturing. The method comprises: performing positive drawing molding and punching on a plate to obtain an arched spoke blank, and forming a pre-hole in the middle of the spoke blank; performing extrusion forming and diameter finishing on the spoke blank to obtain a spoke semi-finished product with a contour surface, the straight edge of the spoke semi-finished product having a preset perpendicularity; punching the spoke semi-finished product to form an air hole and a screw hole bottom hole in the spoke semi-finished product; and finishing the punched spoke semi-finished product, and extruding the screw hole bottom hole to the size to form a screw hole to obtain a spoke finished product. In each process, a composite mold is adopted, and the processing of a plurality of functional features of the product is completed at a time by means of a process, such that the process of the whole manufacturing process is simplified, the input of corresponding device and manpower is reduced, manpower and material resources are saved, the production cost is reduced, and the accumulation error in the product processing process is undoubtedly reduced, such that the processing precision of the product is improved, and the production efficiency and yield are correspondingly improved.

Description

A kind of wheel spoke and preparation method thereof

Incorporation by reference

This application claims the priority of the patent application submitted to the State Intellectual Property Office of China on December 30, 2021 with the application number 202111658678.5 and the title of the invention "a wheel spoke and its preparation method".

technical field

The present application relates to the technical field of wheel spoke manufacturing, in particular to a wheel spoke and a preparation method thereof.

Background technique

The spoke is a device to protect the rim and spoke of the vehicle wheel. It is characterized by a pair of circular cover plates. The diameter of the cover plate is close to the diameter of the wheel rim. There is a hole in the center of the cover plate that is larger than the rotation axis of the wheel. The part near the edge of the cover plate has an opening, and the edge of the cover plate is provided with an annular wheel plate, and the curved surface of the wheel plate can fit closely with the curved surface of the wheel rim.

At present, there are many manufacturing processes for spokes. For example, in the published patent CN104772386B, eight processes are required to obtain the finished product, and there are relatively many production resources such as equipment and manpower, which have great limitations on cost, precision and output.

Contents of the invention

The purpose of the embodiment of the present application is to provide a spoke and its preparation method, which has fewer steps, can reduce the cumulative error in the spoke manufacturing process, increase the yield, and reduce the cost.

In one embodiment of the present application, a method for preparing a spoke is provided, which includes drawing and forming a sheet and punching a hole to obtain an arched spoke blank, and a pre-hole is formed in the middle of the spoke blank;

Extruding the spoke blank and adjusting its diameter to obtain a spoke semi-finished product with a profile surface, and the straight edge of the spoke semi-finished product has a preset verticality;

Stamping the spoke semi-finished product to form air holes and screw hole bottom holes on the spoke semi-finished product;

Finishing the stamped spoke semi-finished product, and extruding the bottom hole of the screw hole to the size to form a screw hole to obtain the finished spoke.

In one embodiment of the present application, the sheet is drawn and punched to obtain an arched spoke blank, and the pre-hole formed in the middle of the spoke blank includes:

Place the sheet material on the lower die of the forming and flanging die, and position it through the sheet positioning block on the upper side of the lower die;

The press drives the upper pressing plate to move down to press the middle part of the sheet;

The upper mold of the forming and flanging die is pressed down to the pressing sheet material on the lower side of the lower mold to cut off the four corners of the sheet material, and the sheet material is formed and flanged; at the same time, the The pre-hole die of the lower mold cooperates with the pre-hole punch arranged on the upper binder plate to form the pre-hole of the spoke blank.

In one embodiment of the present application, the step of extruding the spoke blank and adjusting its diameter to obtain a spoke semi-finished product with a contoured surface, and the straight edge of the spoke semi-finished product having a preset verticality includes:

placing the spoke blank on the lower die of the extrusion die, and roughly positioning through the matching part of the lower die and the spoke blank;

The upper mold of the extrusion die presses down, and the guide pin provided on the upper mold penetrates the spoke blank for precise positioning to form the extrusion, so that the contour surface is formed on the spoke blank;

Through the extrusion of the upper die, the edge of the spoke blank is extruded into the full diameter circle on the outside of the lower die and the lower die, so that the edge of the spoke blank forms the straight edge and has The preset verticality.

In one embodiment of the present application, the punching the spoke semi-finished product to form air holes and screw hole bottom holes on the spoke semi-finished product includes:

Transferring the spoke semi-finished product to a stamping die, and aligning the screw hole die on the stamping die with the boss on the spoke semi-finished product for positioning;

The sliding seat above the stamping die moves down, and the screw hole punch on the sliding seat corresponds to the screw hole die of the stamping die, so as to form the bottom hole of the screw hole at the boss; The air hole punch on the seat corresponds to the air hole die on the stamping die to form the air hole.

In one embodiment of the present application, after stamping the spoke semi-finished product to form air holes and screw hole bottom holes on the spoke semi-finished product, the method further includes:

The stamped semi-finished wheel spoke is transferred to a burr die to squeeze the burrs of the wind holes.

In one embodiment of the present application, the transfer of the stamped semi-finished spoke to the burr die, and pressing the burr of the wind hole includes:

placing the spoke semi-finished product on the slide seat of the burr die, and positioning through the bottom hole of the screw hole and the screw hole positioning pin penetrating into the screw hole;

The upper die of the burr pressing die presses down the spoke semi-finished product, and the burr pressing punch on the slide seat squeezes the burrs of the air holes.

In one embodiment of the present application, the spoke semi-finished product after finishing stamping is pressed, and the bottom hole of the screw hole is extruded to a size to form a screw hole to obtain the finished spoke including:

Place the stamped spoke semi-finished product on the lower mold of the finishing mold, and locate the screw hole concave die corresponding to the lower mold through the screw holes;

The upper mold of the finishing mold presses down, and the punching hole punch of the upper mold corresponds to the punching hole die of the lower mold, so as to punch the pre-hole of the spoke semi-finished product to form the middle hole;

The screw hole extrusion punch of the upper mold corresponds to the screw hole extrusion die, so as to obtain the screw hole by extrusion molding the bottom hole of the screw hole;

The upper mold and the lower mold clamp the spoke semi-finished product to finish corresponding regions of the spoke semi-finished product.

In one embodiment of the present application, the preparation process from the spoke blank to the finished spoke is circulated by a robot.

In one embodiment of the present application, the material of the plate includes high-strength steel.

In another embodiment of the present application, a spoke is provided, which is prepared by the above-mentioned preparation method of the spoke.

The wheel spoke and its preparation method provided in the embodiment of the present application, cut the corner of the sheet material - positive drawing - flanging - punching pre-hole to form an arched spoke blank; and then extrude the spoke blank and adjust the diameter, The spoke semi-finished product that has the same contour surface as the finished spoke can be obtained, and then the spoke semi-finished product is stamped to form the air hole and the screw hole bottom hole, the air hole is punched to the final size, and finally the screw hole bottom hole is extruded to the final size to form the screw hole , while finishing the mounting surface area to obtain finished spokes. Compared with the prior art, the manufacturing method of the spokes provided by the embodiment of the present application adopts composite molds in each process, and completes the processing of multiple functional features of the product through one process, which simplifies the process of the entire production process and reduces the corresponding The input of advanced equipment and labor saves manpower and material resources and reduces production costs; on the other hand, after the reduction of processing procedures, the cumulative error in the product processing process is undoubtedly reduced, thereby improving the processing accuracy of the product and correspondingly improving production. efficiency and production. Correspondingly, the spokes prepared by the aforementioned method for preparing the spokes have high product precision, good batch product consistency, and low cost, meeting the needs of customers.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings that need to be used in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, so It should not be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings according to these drawings without creative work.

Fig. 1 is the preparation method flowchart of the spoke provided by the present embodiment;

Fig. 2 is a diagram of the forming process of the spoke blank provided by the present embodiment;

Fig. 3 is a schematic structural view of the spoke blank provided in this embodiment;

Fig. 4 is the processing diagram of the spoke blank provided by the present embodiment;

Fig. 5 is one of the structural schematic diagrams of the spoke semi-finished products provided in this embodiment;

Fig. 6 is the processing diagram of the spoke semi-finished product provided by the present embodiment;

Fig. 7 is the second structural schematic diagram of the spoke semi-finished product provided by this embodiment;

Fig. 8 is a processing drawing of the air hole and the screw hole bottom hole of the spoke semi-finished product provided in this embodiment;

Fig. 9 is the third structural schematic diagram of the spoke semi-finished product provided by this embodiment;

Fig. 10 is a burr processing diagram of the air pressure hole of the spoke semi-finished product provided in this embodiment;

Fig. 11 is a schematic structural view of the finished spokes provided in this embodiment;

Fig. 12 is a processing diagram of the finished spoke provided in this embodiment.

Icon: 100-sheet material; 101-cutting material; 102a-spoke blank; 102b-semi-finished spoke; 102c-finished spoke; 1021-pre-hole; 1022-straight edge; 1023a, 1023b-boss; ;1025a-screw bottom hole; 1025b-screw hole; 201-gas spring; 202-pre-hole punch; 203-upper pressing plate; 204-blanking die; ;207-lower binder plate;208-lower die;209-pre-hole die;210-guide pin;211-lower die;212-full diameter ring;213-upper die; Hole punch; 216-wind hole die; 217-screw hole die; 218-screw hole punch; 219-upper die; 220-press burr punch; -spring; 224-binder plate; 225-extrusion screw hole die; 226-punching hole die; 227-lower die; 228-upper die; .

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the usual placement of the application product when it is used. Orientation or positional relationship is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

It should also be noted that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct It can also be connected indirectly through an intermediary, or it can be the internal communication of two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

In the published patent CN104772386B, eight processes are used to process circular sheet metal into formed spoke workpieces. There are many processes, and relatively many production resources such as equipment and manpower are equipped, which greatly affects the cost, accuracy and output of spoke processing. .

In order to solve the above problems, the embodiment of the present application provides a method for preparing the spokes, which reduces the preparation process, reduces the number of equipment and labor, improves the precision, and increases the output. Specifically, please refer to Fig. 1, the preparation method of the spoke provided by the embodiment of the present application includes:

S100: Forming and punching the sheet material 100 to obtain an arched spoke blank 102a, and forming a pre-hole 1021 in the middle of the spoke blank 102a.

As shown in Figure 2, the prepared raw material is a square sheet material 100. During the preparation, the four corners of the square sheet material 100 are cut off to form a corner cutting material 101, and then an arched wheel spoke blank 102a is formed, and the formed wheel spoke The blank 102a has a pre-hole 1021 shown in FIG. 3 in the edge flanging and in the middle.

Furthermore, the material of the sheet material 100 is usually high-strength steel, which has good comprehensive properties, and the use of high-strength steel to prepare the finished spoke 102c is beneficial to the mechanical properties of the finished spoke 102c; of course, the sheet 100 can also be other steel materials. Needs prevail, and are not limited to the above-mentioned high-strength steels.

The specific preparation process is, please refer to Fig. 4, place the sheet material 100 on the lower mold 208 of the forming and flanging mold, the upper side of the lower mold 208 has a sheet material positioning block 205, one end of the sheet material 100 and the sheet material positioning block 205, so as to realize the positioning of the blank 100 through the blank positioning block 205 on the upper side of the lower die 208, so that subsequent processing can be performed accurately. After the sheet material 100 is positioned, the press moves downward, driving the upper pressing plate 203 to move down to press the middle of the sheet material 100 under the action of the gas spring 201; the upper die 206 of the forming and flanging die is pressed down to the lower die 208 The lower pressing plate 100 on the side, under the action of the lower pressing plate 207, cuts off the four corners of the plate 100 and performs blanking through the blanking die 204 to complete the corner cutting step to form the corner cutting 101; The positive drawing makes the sheet material 100 shape, and the edge of the sheet material 100 is squeezed between the upper die 206 and the lower die 208 to complete the flanging; The hole punch 202 cooperates to complete the step of punching the pre-hole 1021 to form the pre-hole 1021 of the spoke blank 102a, and obtain the formed arched spoke blank 102a.

The arched spoke blank 102a is arched, or called a bowl-shaped structure, the pre-hole 1021 is located in the middle of the arch, and the spoke blank 102a is symmetrically arranged on both sides with the pre-hole 1021 as the center; the arch with the pre-hole 1021 The bottom of the shape is a plane, and the side walls connected with the plane are connected by a plurality of continuous arc surfaces; by cutting the corners of the sheet material 100-forming-flanging-punching the pre-hole 1021, to form the spoke blank 102a shown in Figure 3 , and the 1021 steps of corner cutting-forming-flange-punching and pre-hole are completed by the mold in Figure 3 at one time, which improves the production efficiency, and one-time forming also reduces the cumulative error in the production process, thereby improving the manufacturing accuracy of the product .

S110: Extrude the spoke blank 102a and adjust its diameter to obtain a spoke semi-finished product 102b with a contoured surface, and the straight edge 1022 of the spoke semi-finished product 102b has a preset verticality.

After the arched spoke blank 102a is obtained from S100, the spoke blank 102a is transferred to the next process with a manipulator, that is, step S110; the manipulator is used to transfer the workpiece, which can directly place the workpiece at the corresponding position in the mold, and the transfer efficiency is high. The transfer between the subsequent processes is completed by the manipulator. The manipulator takes out the workpiece from the mold of the previous process, and then places the workpiece in the mold of the next process, and reciprocates in this way to complete the transfer of batch workpieces between processes.

As shown in Figure 6, the manipulator transfers the spoke blank 102a from the die of the previous process to the extrusion die of this process, the spoke blank 102a is placed on the lower die 211 of the extrusion die, and passes through the lower die 211 Coarse positioning with the matching place of the spoke blank 102a; as shown in Figure 3, an arc surface is formed on the side wall of the spoke blank 102a, and the arc position matching with the arc shape of the spoke blank 102a is arranged on the lower die 211, two or coarse positioning by shape. Then, under the action of the press, the upper die 213 of the extrusion die is pressed down, and the guide pin 210 arranged on the upper die 213 penetrates the pre-hole 1021 of the spoke blank 102a to carry out precise positioning, and the press continues to descend to complete the process. Extrusion molding of the area in the dotted line frame in the middle part of Fig. 5, in this way, the contour surface of the spoke finished product 102c is formed on the spoke blank 102a; by the extrusion of the upper die 213, the edge of the spoke blank 102a acts on the upper die 213 Next, squeeze into the lower die 211 and the diameter-adjusting ring 212 on the outside of the lower die 211, so that the edge of the spoke blank 102a forms a straight edge 1022 and has a preset verticality, completes the diameter adjustment, and the press moves up to complete the production of this process .

After extrusion molding and diameter adjustment in this process, the spoke semi-finished product 102b with contour surface is obtained. At this time, the spoke semi-finished product 102b is basically consistent with the spoke finished product 102c in shape, forming an undulating shape to improve the rigidity of the spoke finished product 102c. In FIG. 5 , with the pre-hole 1021 as the center, two bosses are respectively arranged on both sides of the pre-hole 1021 , the boss 1023 a on the left has a smaller degree of protrusion, and the protrusion 1023 b on the right has a larger degree of protrusion. Wherein, the boss 1023b on the right is used as a positioning reference in the subsequent process, see step S120 for details.

S120: Punching the spoke semi-finished product 102b to form air holes 1024 and screw hole bottom holes 1025a on the spoke semi-finished product 102b.

After the spoke semi-finished product 102b is obtained, as shown in Figure 8, the spoke semi-finished product 102b is transferred to the stamping die, and the screw hole die 217 on the stamping die is aligned with the boss 1023b on the spoke semi-finished product 102b for positioning; The sliding seat 214 goes down through the press, wherein the sliding seat 214 is provided with an air hole punch 215 and a screw hole punch 218, and the air hole punch 215 on the sliding seat 214 corresponds to the air hole die 216 on the stamping die. The screw hole punch 218 on the slide seat 214 corresponds to the screw hole die 217 of the stamping die; the air hole punch 215 completes the air blow on the side wall of the spoke semi-finished product 102b through its wedge mechanism under the action of the press machine going down and the slide seat 214. Hole 1024 blanking, to form wind hole 1024; Simultaneously, screw hole punch 218 and screw hole die 217 finish punching screw hole bottom hole 1025a, to form screw hole bottom hole 1025a at boss 1023b place, need know that this moment screw hole Bottom hole 1025a is not final size. The air holes 1024 and the screw bottom holes 1025a are formed to reduce the quality of the spokes and facilitate the heat dissipation of the brake.

Please refer to Fig. 7, the air hole 1024 is located on the arc surface of the workpiece side wall, the axis of the air hole 1024 has an included angle with the horizontal plane, in other words, the air hole 1024 is arranged obliquely; therefore, the air hole die 216 and the sliding seat 214 The air hole punch 215 is matched with the air hole 1024 and arranged obliquely, and the air hole 1024 arranged obliquely is formed through the cooperation of the air hole die 216 and the air hole punch 215 .

In addition, the air holes 1024 and the screw hole bottom holes 1025a have a corresponding number. When punching the air holes 1024 and the screw holes, the number and diameter of the air holes 1024 and the screw hole bottom holes 1025a are punched out in one punching. Holes 1024 are directly punched to size; for example, the number of air holes 1024 in this application can be divided into two groups, and the two groups of air holes 1024 are symmetrically distributed on both sides with the pre-hole 1021 as the center; the number of screw hole bottom holes 1025a depends on the specific product OK, no more details here.

S130: Transfer the stamped semi-finished spoke 102b to a burr pressing die, and squeeze the burrs of the air holes 1024.

After forming the air hole 1024 and the screw hole bottom hole 1025a by stamping, the burr in the air hole 1024 needs to be squeezed to remove the burr; specifically, as shown in Figure 10, the stamped semi-finished spoke 102b is placed in the burr press On the sliding seat 221, a positioning hole is provided on the sliding seat 221 corresponding to the screw hole bottom hole 1025a, and the screw hole positioning pin 222 pierced into the screw hole bottom hole 1025a is positioned; specifically, the screw hole positioning pin 222 Penetrate the screw hole bottom hole 1025a and the positioning hole for positioning; afterward, the upper die 219 of the burr die is pressed down to press the spoke semi-finished product 102b under the action of the press, and the deburring punch 220 on the slide seat 221 is against the wind at the same time. The burr in the hole 1024 is squeezed; the burr pressing punch 220 in the slide seat 221 squeezes the burr in the air hole 1024 through its wedge mechanism, and the deburring process of the air hole 1024 is completed to form the spoke semi-finished product 102b shown in FIG. 9 .

S140: finishing the stamped spoke semi-finished product 102b, and extruding the screw hole bottom hole 1025a to the size of the screw hole 1025b to obtain the finished spoke 102c.

The spoke semi-finished product 102b after deburring is placed on the lower mold 227 of the finishing mold shown in Figure 12, and the extrusion screw hole concave die 225 of the corresponding lower mold 227 is positioned through the screw hole bottom hole 1025a; 228 presses down, the upper mold 228 is mainly the spring 223 connected by the pressing plate 224 and the pre-pressing plate 224, the pressing plate 224 presses the workpiece under the action of the press, the spring 223 is compressed, the press continues to go down, the upper mold 228 The center hole punch 229 corresponding to the center hole punch 226 of the lower die 227 is used to punch the pre-hole 1021 of the spoke semi-finished product 102b, and the hole expansion makes it form the center hole; meanwhile, the extrusion screw hole punch 230 of the upper die 228 Corresponding to the extrusion screw hole die 225, the extrusion molding of the screw hole bottom hole 1025a is completed, and the screw hole bottom hole 1025a is extruded to the size to form the screw hole 1025b; and the upper mold 228 and the lower mold 227 clamp the spoke semi-finished product 102b to complete The corresponding area of the spoke semi-finished product 102b is mainly the finishing of the mounting surface area to make it reach the final dimensional tolerance, and obtain the final spoke finished product 102c shown in Figure 11; The material return is completed during the machine up.

It can be seen that the method for preparing the spokes provided in the embodiment of the present application is to cut the corners of the sheet 100-normal drawing-flanging-punching the pre-holes 1021 to form the arched spoke blanks 102a; and then extrude the spoke blanks 102a After forming and adjusting the diameter, the spoke semi-finished product 102b having the same outline as the spoke finished product 102c can be obtained, and then the spoke semi-finished product 102b is stamped to form air holes 1024 and screw hole bottom holes 1025a, and the air holes 1024 are punched to the final size, and then The burrs in the wind holes 1024 are extruded to deburr, and finally the screw hole bottom hole 1025a is extruded to the final size to form the screw hole 1025b. At the same time, the mounting surface area is finished to obtain the finished spoke 102c. The manufacturing method of the wheel spoke provided in the embodiment of the present application can only be completed by completing eight processes in the prior art through five processes. In addition to burrs, the processing of multiple functional features of the product is completed in one process in other processes. For example, the first process completes the four functional features of corner cutting-forming-flange-punching and pre-hole 1021, making the process of the entire production process It can be simplified, thereby reducing the input of corresponding equipment and labor, saving manpower and material resources, and reducing production costs; Accuracy, but also a corresponding increase in production efficiency and output.

On the other hand, the embodiment of the present application also discloses a wheel spoke, which is prepared by the aforementioned method for preparing the wheel spoke, and the wheel spoke prepared by the aforementioned method of preparing the wheel spoke, that is, the finished wheel spoke 102c, has high product precision and good batch product consistency , and low cost, to meet customer needs.

The wheel spoke has the same structure and beneficial effect as the manufacturing method of the wheel spoke in the foregoing embodiments. The structure and beneficial effects of the manufacturing method of the spokes have been described in detail in the foregoing embodiments, and will not be repeated here.

The above descriptions are only examples of the present application, and are not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and changes may be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

A method for preparing a spoke, characterized in that it comprises:

drawing and forming the sheet material and punching holes to obtain an arched spoke blank, and a pre-hole is formed in the middle of the spoke blank;

Extruding the spoke blank and adjusting its diameter to obtain a spoke semi-finished product with a profile surface, and the straight edge of the spoke semi-finished product has a preset verticality;

Stamping the spoke semi-finished product to form air holes and screw hole bottom holes on the spoke semi-finished product;

Finishing the stamped spoke semi-finished product, and extruding the bottom hole of the screw hole to the size to form a screw hole to obtain the finished spoke.
The preparation method of the wheel spoke according to claim 1, characterized in that, the sheet is drawn and punched to obtain an arched spoke blank, and the pre-hole formed in the middle of the spoke blank comprises:

Place the sheet material on the lower die of the forming and flanging die, and position it through the sheet positioning block on the upper side of the lower die;

The press drives the upper pressing plate to move down to press the middle part of the sheet;

The upper mold of the forming and flanging die is pressed down to the pressing sheet material on the lower side of the lower mold to cut off the four corners of the sheet material, and the sheet material is formed and flanged; at the same time, the The pre-hole die of the lower mold cooperates with the pre-hole punch arranged on the upper binder plate to form the pre-hole of the spoke blank.
The method for preparing a wheel spoke according to claim 1, wherein the spoke blank is extruded and rounded to obtain a spoke semi-finished product with a profile surface, and the straight edge of the spoke semi-finished product has a predetermined Perpendicularity includes:

placing the spoke blank on the lower die of the extrusion die, and roughly positioning through the matching part of the lower die and the spoke blank;

The upper mold of the extrusion die presses down, and the guide pin provided on the upper mold penetrates the spoke blank for precise positioning to form the extrusion, so that the contour surface is formed on the spoke blank;

Through the extrusion of the upper die, the edge of the spoke blank is extruded into the full diameter circle on the outside of the lower die and the lower die, so that the edge of the spoke blank forms the straight edge and has The preset verticality.
The method for preparing a spoke according to claim 1, wherein said punching said semi-finished spoke to form air holes and screw holes on said semi-finished spoke comprises:

Transferring the spoke semi-finished product to a stamping die, and aligning the screw hole die on the stamping die with the boss on the spoke semi-finished product for positioning;

The sliding seat above the stamping die moves down, and the screw hole punch on the sliding seat corresponds to the screw hole die of the stamping die, so as to form the bottom hole of the screw hole at the boss; The air hole punch on the seat corresponds to the air hole die on the stamping die to form the air hole.
The preparation method of the spoke according to claim 4, characterized in that, after stamping the spoke semi-finished product to form air holes and screw hole bottom holes on the spoke semi-finished product, the method further comprises:

The stamped semi-finished wheel spoke is transferred to a burr die to squeeze the burrs of the wind holes.
The method for preparing a spoke according to claim 5, wherein the step of transferring the stamped semi-finished spoke to a burr die, and squeezing the burr of the wind hole comprises:

placing the spoke semi-finished product on the sliding seat of the burr die, and positioning through the bottom hole of the screw hole and the screw hole positioning pin penetrating into the bottom hole of the screw hole;

The upper die of the burr pressing die presses down the spoke semi-finished product, and the burr pressing punch on the slide seat squeezes the burrs of the air holes.
The preparation method of the wheel spoke according to claim 1, characterized in that, said finishing and punching said semi-finished wheel spoke, and extruding said screw hole bottom hole to a size to form a screw hole, and obtaining the finished wheel spoke comprises:

Place the stamped spoke semi-finished product on the lower mold of the finishing mold, and locate the screw hole concave die corresponding to the lower mold through the bottom hole of the screw hole;

The upper mold of the finishing mold presses down, and the punching hole punch of the upper mold corresponds to the punching hole die of the lower mold, so as to punch the pre-hole of the spoke semi-finished product to form the middle hole;

The screw hole extrusion punch of the upper mold corresponds to the screw hole extrusion die, so as to obtain the screw hole by extrusion molding the bottom hole of the screw hole;

The upper mold and the lower mold clamp the spoke semi-finished product to finish corresponding regions of the spoke semi-finished product.
The method for preparing a spoke according to any one of claims 1-7, characterized in that the preparation process from the spoke blank to the finished spoke is circulated by a manipulator.
The manufacturing method of the wheel spoke according to claim 1, characterized in that, the material of the sheet material includes high-strength steel.
A wheel spoke, characterized in that it is prepared by the method for preparing a wheel spoke according to any one of claims 1-9.