CN114433743A - Wheel cover convex part stamping die and wheel cover convex part stamping method - Google Patents

Abstract

The invention relates to a wheel cover convex part stamping die and a wheel cover convex part stamping method. The wheel cover convex part stamping die comprises an upper die assembly and a lower die assembly, wherein a blank placing position is arranged on the lower die assembly and used for positioning and placing an arc-shaped blank; the blank placing positions are provided with two positions which are oppositely arranged so that the arc-shaped blank can be placed in a mode that the openings are opposite, or the two blank placing positions are oppositely arranged so that the arc-shaped blank can be placed in a mode that the openings are opposite. Two blank placing positions used for placing arc-shaped blanks are arranged on the lower die assembly, the arc-shaped blanks are symmetrically placed in a mode that the openings are opposite or the openings are opposite, when the stamping die for the raised parts of the wheel cover performs stamping action, the two arc-shaped blanks are stamped simultaneously, the lower die assembly can be enabled to bear force along the horizontal direction in a balanced manner, and therefore dislocation of the lower die assembly relative to the upper die assembly is avoided, and the processing quality of the raised parts of the wheel cover is guaranteed.

Description

Stamping die for raised part of wheel cover and punching method for raised part of wheel cover

technical field

The invention relates to a stamping die for a raised part of a wheel cover and a punching method for the raised part of a wheel cover.

Background technique

The wheel cover is an important component of the car, which is used to prevent splashes, rainwater, flying stones, etc., which are generated when the wheels are running, from invading the engine compartment and the car body. In order to play the role of aesthetics and increase strength, more and more wheel covers are no longer a flat structure, but a raised structure is machined close to the wheel.

The wheel cover includes a convex part and a flat plate part located outside the convex part. In the prior art, an arc-shaped blank is punched by a punching die for the convex part of the wheel cover to form a convex part with a convex structure, and then spliced with the flat plate part. Welded to form a complete wheel cover. The arc-shaped blank before forming is an annular plate, and the convex part after forming is shown in Figure 1 (the part in the middle of the figure is the cross-sectional shape). The stamping die includes an upper die assembly and a lower die assembly, the upper die assembly is fixed on the output end of the press, and the lower die assembly is fixed to the workbench of the press in the form of bolts and long holes. During the stamping process, the upper die assembly and the lower die assembly jointly extrude the arc-shaped blank to a preset shape. During the stamping process, the stamping die set is subjected to a reaction force in the horizontal direction of the blank.

In the prior art, only one wheel cover is usually formed at one time, because the arc-shaped blank is in the form of side openings, which will cause the unbalanced force in the horizontal direction of the stamping die, and the lower die in the stamping die. The parts are usually fixed to the workbench of the press by means of bolts and long holes. When the lower die assembly is subjected to a large unbalanced force in the horizontal direction, the lower die assembly will be displaced relative to the workbench of the press. , so as to produce dislocation with the upper die assembly, affecting the processing quality of the wheel cover.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a stamping die for the raised part of the wheel cover, so as to solve the problem that the stamping die for the raised part of the wheel cover in the prior art is subjected to uneven force during the stamping process and affects the processing quality of the wheel cover; the present invention Another purpose is to provide a method for punching the raised parts of the wheel cover, so as to solve the problem of uneven force during the punching process in the method for punching the raised parts of the wheel cover in the prior art, which affects the processing quality of the wheel cover.

In order to achieve the above object, the technical scheme of the stamping die for the raised part of the wheel cover in the present invention is:

The stamping die for the convex part of the wheel cover includes an upper die assembly and a lower die assembly, and the upper die assembly and the lower die assembly are used to punch out the convexity from the arc blank;

There is a blank placement position on the lower die assembly, and the blank placement position is used for the positioning and placement of the arc blank;

The blank placement positions are provided at two positions, and the two blank placement positions are arranged opposite to each other so that the arc-shaped blanks are placed in an opposite manner with respect to the openings, or, the two blank placement positions are arranged opposite to each other for the arc-shaped blanks to be arranged with the openings opposite to each other. place.

The beneficial effect of the stamping die for the convex part of the wheel cover in the present invention is that: the lower die assembly has two blank placement positions for placing the arc-shaped blanks, and the arc-shaped blanks are symmetrically placed in the form of opposite openings or opposite openings, When the stamping die on the raised part of the wheel cover performs the stamping action, the two arc-shaped blanks are stamped at the same time, so that the force of the lower die assembly in the horizontal direction can be balanced, and it is avoided that when the upper die assembly punches the blank, the blank The reaction force of the lower mold assembly causes the lower mold assembly to be displaced relative to the worktable, thereby avoiding the dislocation of the upper mold assembly and the lower mold assembly, which is beneficial to ensure the processing quality of the raised parts of the wheel cover.

Further, the lower die assembly includes a concave die, two blank placement positions are used for symmetrically placing two arc-shaped blanks in the form of opposite openings, and the cavity of the concave die is formed by an annular cavity passing through in the circumferential direction.

The advantage is that it facilitates the processing of the die.

Further, the upper die assembly includes a punch, and the punch is provided with an annular punching protrusion for punching an arc-shaped blank, and the annular punching bulge is closed in the circumferential direction.

The advantage is that it facilitates the processing of punches.

Further, the upper die assembly includes a bottom plate of a punch, and the annular punching protrusion is integrally formed on the bottom plate of the punch.

The advantage lies in that the punch and the punch bottom plate are integrated, so that the punch has a higher strength.

Further, the lower die assembly includes an inner die, an outer die and a stripping plate, the stripping plate is an annular plate arranged between the inner die and the outer die, and the cavity of the concave die is located in the inner die and the outer die. between;

The bottom of the return plate is provided with a bottom step, and the inner side of the outer mold is provided with an annular step, and the annular step forms an activity space, and the movable space is used for the upper and lower movement of the return plate;

The top surface of the annular step blocks the bottom step of the stripping plate to prevent the stripping plate from coming out upward.

The advantage is that the annular step stops the bottom step, which facilitates the placement of the arc blank on the blank placement position.

Further, the overall shape of the two blank placement positions is consistent with the shapes of the two arc-shaped blanks in the butted state.

The advantage is that it is beneficial to reduce the volume of the mold, and it is avoided that the overall volume of the mold is too large due to the simultaneous setting of two blank placement positions.

Further, the upper die assembly also includes a press connecting plate, an upper die pad and an intermediate support plate;

Press connection plate for fixing to the press;

an upper die pad for the fixed connection of the punch;

The middle support plate is vertically connected between the press connecting plate and the upper die pad, and the middle support plate is evenly arranged in the horizontal direction.

The advantages are that the weight of the upper die assembly is lighter, the installation is convenient, and the punch can be uniformly stressed.

Further, the upper die assembly is provided with a pressing plate, the pressing plate corresponds to the outer die, and is guided and assembled on the upper die pad along the up-down direction;

An elastic piece is arranged between the pressing plate and the upper die pad, and the pressing plate is a square pressing plate with an oblong hole in the middle.

The advantage is that the pressure plate is a square pressure plate with an oblong hole in the middle, which is in the form of a semi-annular pressure plate or a plurality of pressure plates distributed in the circumferential direction, which is convenient for assembly, and the pressure plate is in a plane. inside, which is conducive to reliable crimping.

Further, the upper die pad is provided with guide holes, and the top surface of the pressing plate is provided with an equal-height sleeve adapted to the guide hole, and the equal-height sleeve is pressed and fixed to the press by the screw passing through it. the top surface of the sheet;

The equal-height sleeves are evenly distributed along the circumferential direction, and the heights of each equal-height sleeve are the same;

The top of the equal-height sleeve is provided with an eversion edge, and the bottom surface of the eversion edge stops and cooperates with the top surface of the upper die plate.

The advantage lies in that the setting of the equal-height sleeve and its upper everted edge can guide the movement of the pressing plate while avoiding the deflection of the pressing plate and ensure that the pressing plate is in the horizontal plane.

The technical scheme of the punching method for the convex part of the wheel cover in the present invention is as follows: two symmetrical blank placement positions are set on the lower die assembly of the stamping die for the convex part of the wheel cover, and the two blank placement positions are used for the two arc-shaped blanks to The openings are placed opposite or opposite to form two arc-shaped blanks at the same time in one punch of a punching die for the raised portion of the wheel house.

The beneficial effect of the punching method for the raised part of the wheel cover in the present invention is that: the lower die assembly has two blank placement positions for placing the arc-shaped blanks, and the arc-shaped blanks are symmetrically placed in the form of opposite openings or opposite openings, When the stamping die on the raised part of the wheel cover performs the stamping action, the two arc-shaped blanks are stamped at the same time, so that the force of the lower die assembly in the horizontal direction can be balanced, and it is avoided that when the upper die assembly punches the blank, the blank The reaction force of the lower mold assembly causes the lower mold assembly to be displaced relative to the worktable, thereby avoiding the dislocation of the upper mold assembly and the lower mold assembly, which is beneficial to ensure the processing quality of the raised parts of the wheel cover.

Description of drawings

Fig. 1 is the structure schematic diagram of the raised part of the wheel cover;

2 is a schematic structural diagram of a specific embodiment of a stamping die for a raised portion of a wheel cover according to the present invention;

Fig. 3 is the structural representation of the upper die assembly in Fig. 2;

Fig. 4 is the structural representation of the lower die assembly in Fig. 2;

Fig. 5 is the structural representation of the annular stripping plate in Fig. 1;

Fig. 6 is the structural representation of the outer mold in Fig. 1;

Fig. 7 is the enlarged view of A place in Fig. 2;

In the picture: 1. Upper die press connecting plate, 2. Sealing plate, 3. Intermediate support plate, 4. Upper die pad, 5. Punch bottom plate, 6. Youli rubber pressure plate, 7. Youli rubber column, 8 , Upper lifting lug, 9, Ring press plate, 10, Positioning guide post, 11, Ring punching protrusion, 12, Groove, 13, Guide post avoidance hole, 14, Lower die seat, 15, Outer die, 151, Ring Step, 16, Removal plate, 161, Annular upper end face, 162, Bottom step, 17, Inner mold, 171, Annular recess, 18, Lower lifting lug, 19, Guide rod through hole, 20, Positioning hole, 21, Connection Bolt, 22, Equal-height sleeve, 221, Outturned edge, 23, Active space, 24, Raised part, 241, Raised structure.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

It should be noted that relational terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The embodiments of the present invention will be further described below with reference to the accompanying drawings.

A specific embodiment of the stamping die for the raised part of the wheel cover in the present invention includes an upper die assembly and a lower die assembly. As shown in Figures 1 and 2, the upper die assembly includes an upper die press connecting plate located at the upper part. 1. The connecting plate 1 of the upper mold press is used to be fixedly connected with the output end of the press to drive the upper mold assembly to move up and down, and the connecting plate 1 of the upper mold press passes through the middle support plate 3 and the sealing plate 2 perpendicular to the middle support The upper die pad 4 is fixedly connected, and the middle support plate 3 is arranged vertically, and is fixedly connected to the upper die press connecting plate 1 and the upper die pad 4 by connecting bolts. There are two sealing plates 2, which are perpendicular to the plate surface of the middle supporting plate 3, and are located on both sides of the middle supporting plate 3 in the horizontal direction. The sealing plate 2 is fixedly connected to the middle supporting plate 3. 3. Balance the force on the upper die pad 4.

The bottom of the upper die plate 4 is fixedly connected with a punch bottom plate 5 by fixing bolts. The middle part of the punch bottom plate 5 is provided with a groove 12. The lifting 11 is provided with countersinks, and the fixing bolts used for fixed connection with the upper die pad 4 are arranged in the countersunk holes, so as to avoid the influence of the fixing bolts on the pressing of the arc-shaped blank.

The upper die backing plate 4 is provided with an elastic pressing piece on the outer side of the punch bottom plate 5, and the elastic pressing piece includes a superior force glue column 7 and an annular pressing plate 9. The upper die backing plate 4 surrounds the punch bottom plate 5 along the circumference. The accommodating through holes are evenly arranged in the direction, and the end of the accommodating through holes far away from the punch bottom plate 5 is covered with the superior glue pressing plate 6, and the superior glue pressing plate 6 and the accommodating through holes enclose the superior glue container for accommodating the superior glue column 7. groove, the lower plate of the superior glue pressure plate 6 faces the superior force glue column 7 to block, forming a reference surface for the elastic deformation of the superior force glue column 7 . The annular pressing plate 9 is used to press the arc-shaped blank to the top surface of the outer die 15 before the stamping die on the raised part of the wheel housing performs the stamping action. During the action, while the annular blanking plate 9 is pressed against the arc-shaped blank, the interference of the annular blanking plate 9 with the stamping action of the stamping die of the raised part of the wheel housing is avoided.

As shown in FIG. 7 , the annular blanking plate 9 is guided and assembled on the upper die pad 4 by connecting bolts 21 , the connecting bolts 21 are fixed to the top surface of the annular blanking plate 9 , and the upper die pad 4 is provided with bolts to pass through it. The bolt through hole is used for the screw rod of the connecting bolt 21 to pass through. The screw of the connecting bolt 21 is sleeved with an equal-height sleeve 22, the top of the equal-height sleeve 22 is provided with an eversion edge 221, the top surface of the eversion edge 221 abuts on the bolt head of the connecting bolt 21, and the eversion edge The bottom surface of 221 is blocked by the hole edge of the bolt through hole; In this embodiment, in order to facilitate processing, the outer contour of the eversion edge 221 is a regular quadrilateral. In other embodiments, the outer contour of the eversion edge 221 may be other shapes, for example, a circle. For another example, instead of the eversion edge 221 , spaced blocking protrusions are provided on the outer peripheral surface of the top of the equal-height sleeve 22 to replace the function of the eversion edge 221 . For another example, the function of the eversion edge 221 is replaced by a bolt arranged in the radial direction of the equal-height sleeve 22 .

As shown in FIG. 3 and FIG. 4 , the lower die assembly includes a lower die base 14 located at the lower part, and the lower die base 14 is used for being fixedly connected with the working table of the press. The lower mold base 14 is provided with an inner mold 17 , and the inner mold 17 corresponds to the groove 12 of the punch bottom plate 5 . The inner mold 17 is provided with countersunk holes, and the inner mold 17 is fixedly connected to the lower mold base 14 through fixing bolts in the countersunk holes.

As shown in FIG. 5 , the lower die assembly is provided with a stripping plate 16 on the outer side of the inner die 17 , and the stripping plate 16 is a square pressing plate with an oblong hole in the middle. The position of the stripping plate 16 corresponds to the annular punching protrusion 11 , and the stripping plate 16 has an annular upper end surface 161 for cooperating with the annular crimping protrusion 11 to clamp the wheel cover. The lower die base 14 is provided with a guide rod through hole 19 at the position corresponding to the ejection plate 16. The guide rod through hole 19 is used for the press guide rod on the press to pass through. move.

An annular outer die 15 is provided on the outer side of the stripping plate 16 , and the outer die 15 is provided with countersunk holes, which are fixedly connected to the lower die base 14 through bolts in the countersunk holes. The outer mold 15 corresponds to the position of the annular blanking plate 9, so as to cooperate with the annular blanking plate 9 to clamp the outer edge of the arc blank during the pressing process to prevent shrinkage and wrinkling at the edge of the wheel cover.

As shown in FIG. 6 , the top of the side of the outer mold 15 close to the inner mold 17 is provided with an annular step 151 , and the step of the annular step 151 faces downward. The bottom of the stripping plate 16 is provided with a bottom step 162, and the stripping plate 16 is formed between the annular step 151 and the lower die base 14 to move up and down the movable space 23. Stop to prevent the ejector plate 16 from coming out upward.

The height of the inner mold 17 is higher than that of the outer mold 15, the outer edge of the inner mold 17 has an annular recess 171, the top surface of the annular recess 171 and the top surface of the outer mold 15 are on the same horizontal plane, and the top surface of the annular recess 171 and the outer mold are A part of the top surface of the slack forms a blank placement position for the arc-shaped blank to be placed. There are two blank placement positions, for the two arc blanks to be placed opposite each other. The overall contour of the annular punching protrusion 11 and the die matches the shape of the two arc blanks. The portion of the inner mold 17 located inside the annular recess 171 forms a positioning protrusion, and the positioning protrusion stops the arc blank along the radial direction of the arc blank to locate the arc blank in the blank placement position.

The annular concave portion 171, the outer die and the stripping plate 16 together form a concave die, and the outer side of the annular concave portion 171, the top surface of the stripping plate 16 and the inner surface of the outer die of the outer die together form the cavity of the concave die. The cavity is an annular cavity passing through in the circumferential direction and matches the shape of the annular punching protrusion 11 , so as to form a semi-annular protrusion corresponding to a half edge of the annular punching protrusion 11 on the arc blank.

The upper die pad 4 is provided with a positioning guide post 10 , the annular press plate 9 is provided with a guide post avoidance hole 13 for avoiding the positioning guide post 10 , and the outer die 15 is provided with a positioning hole for matching with the positioning guide post 10 20. The positioning guide post 10 can simultaneously guide the relative movement of the annular blanking plate 9 and the upper die pad 4 and the relative movement of the upper die assembly and the lower die assembly. The upper mold assembly and the lower mold assembly are respectively provided with an upper lifting lug 8 and a lower lifting lug 18 for transportation by hoisting.

The use process of the mold of the present invention is as follows: firstly, the upper mold assembly and the lower mold assembly are placed on the working table of the press machine in a fitted state, then the lower mold base 14 is fixedly connected to the working table of the press machine, and the upper mold base 14 is fixedly connected to the press table. The connecting plate 1 of the molding press is fixedly connected with the driving slider of the press, and the stroke and closing height of the press are adjusted to a fixed value. Control the press to drive the upper die assembly to rise, push the ejector plate 16 to the upper end of the movable space under the action of the guide post of the press, position the two arc-shaped blanks on the blank placement position, and control the slide of the press to fall and pressurized, the annular pressing plate 9 and the outer die 15 clamp the arc-shaped blank, and the annular punching protrusion 11 and the annular upper end surface 161 of the stripping plate 16 clamp the arc-shaped blank. The press slider continues to fall, and the elastic deformation of the superior force rubber column 7 causes the annular pressing plate 9 to move upward to avoid the outer die 15, and the ejection plate 16 moves downward in the movable space to avoid the annular punching protrusion 11 until the annular pressing The material plate 9 is attached to the upper die backing plate 4, and the stamping action of the stamping die for the raised part of the wheel housing is completed. Control and drive the slider to rise, and at the same time, push the ejector plate 16 to rise through the guide rod of the press to push the wheel cover out of the lower die assembly to complete the processing of the raised part of the wheel cover. As the conventional structure of the press, there is a hydraulic pad under the working table of the press, and a hydraulic cylinder is arranged in the hydraulic pad. The hydraulic cylinder is used to support the lift platform, and the lift platform is used to lift the guide rod of the press; The cylinder is set to automatic pressure relief or manual pressure relief. After the stamping of the workpiece is completed, the hydraulic pad of the press releases the pressure to drive the lifting platform to fall. The guide rod of the press loses the lifting effect of the lifting platform and falls with the lifting platform. The stripping plate 16 can also be dropped.

In this embodiment, the two blank placement positions are for two arc-shaped blanks to be placed opposite each other in the form of opposite openings. At this time, the cavity of the concave mold and the convex mold are both integral annular structures. In other embodiments, other Form, for example, two blank placement positions for two arc-shaped blanks to be symmetrically placed with the openings facing each other. For another example, the two blank placement positions are for the symmetrical placement of two arc-shaped blanks in the form of opposite openings and spaced apart. At this time, the cavity of the concave mold can be formed by a ring structure that penetrates in the circumferential direction, or can be formed by two separate parts. The set U-shaped structure is formed. When the concave die is in a split form, the punch must be set in a separate form corresponding to the concave die. When the concave die is in the integral form, the punch can be in the integral form or in a split form.

In this embodiment, an intermediate support plate and a sealing plate are used to transmit the force from the press connecting plate to the upper die pad. In other embodiments, other forms, such as intermediate support columns, may be adopted.

In this embodiment, the blanking plate adopts an integral form, and in other embodiments, the blanking plate may adopt other forms, for example, two half rings corresponding to the two blank placement positions respectively.

In other embodiments, a die adapted to the shape of the wheel cover may be used, a complete wheel cover blank may be placed on the blank placement position, and a complete wheel cover may be processed through a stamping operation.

In a specific embodiment of the method for stamping the convex part of the wheel cover of the present invention, two symmetrical blank placement positions are set on the lower die assembly of the stamping die for the convex part of the wheel cover, and the two blank placement positions are used for the two arc-shaped blanks. The openings are placed in the form of opposite or opposite, so that the stamping die of the raised part of the wheel cover is punched at one time to form two arc-shaped blanks.

Claims (10)

1. The stamping die for the convex part of the wheel cover, including the upper die assembly and the lower die assembly, the upper die assembly and the lower die assembly are used to punch out the convexity from the arc blank; There is a blank placement position on the lower die assembly, and the blank placement position is used for the positioning and placement of the arc blank; It is characterized by: The blank placement positions are provided at two positions, and the two blank placement positions are arranged opposite to each other so that the arc-shaped blanks are placed in an opposite manner with respect to the openings, or, the two blank placement positions are arranged opposite to each other for the arc-shaped blanks to be arranged with the openings opposite to each other. place. 2 . The stamping die for the raised part of the wheel cover according to claim 1 , wherein the lower die assembly comprises a concave die, and two blank placement positions are used for symmetrically placing two arc-shaped blanks in the form of opposite openings, 2 . The cavity of the female mold is formed by an annular cavity that penetrates in the circumferential direction. 3. The stamping die for the raised part of the wheel cover according to claim 2, wherein the upper die assembly comprises a punch, and the punch is provided with an annular punching projection for punching an arc-shaped blank, The annular punching projection is closed in the circumferential direction. 4 . The stamping die for the raised portion of the wheel cover according to claim 3 , wherein the upper die assembly comprises a bottom plate of a punch, and the annular punching protrusion is integrally formed on the bottom plate of the punch. 5 . 5. The wheel cover protruding part stamping die according to claim 2, 3 or 4, wherein the lower die assembly comprises an inner die, an outer die and a stripping plate, and the stripping plate is provided in the inner die and the annular plate between the outer mold, the cavity of the female mold is located between the inner mold and the outer mold; The bottom of the return plate is provided with a bottom step, and the inner side of the outer mold is provided with an annular step, and the annular step forms an activity space, and the movable space is used for the upper and lower movement of the return plate; The top surface of the annular step blocks the bottom step of the stripping plate to prevent the stripping plate from coming out upward. 6 . The stamping die for the raised part of the wheel cover according to claim 2 , wherein the overall shape of the two blank placement positions is consistent with the shapes of the two arc-shaped blanks in the butted state. 7 . 7. The stamping die for a raised portion of a wheel cover according to any one of claims 1 to 4, wherein the upper die assembly further comprises a press connecting plate, an upper die pad and an intermediate support plate; Press connection plate for fixing to the press; an upper die pad for the fixed connection of the punch; The middle support plate is vertically connected between the press connecting plate and the upper die pad, and the middle support plate is evenly arranged in the horizontal direction. 8 . The stamping die for the raised part of the wheel cover according to claim 7 , wherein the upper die assembly is provided with a pressing plate, the pressing plate corresponds to the outer die, and is guided and assembled on the upper die along the up-down direction. 9 . formwork plate; An elastic piece is arranged between the pressing plate and the upper die pad, and the pressing plate is a square pressing plate with an oblong hole in the middle. 9 . The stamping die for the raised part of the wheel cover according to claim 8 , wherein the upper die pad is provided with guide holes, and the top surface of the pressing plate is provided with equal heights adapted to the guide holes. 10 . The sleeve, the equal-height sleeve is pressed and fixed on the top surface of the pressing plate by the screw passing through it; The equal-height sleeves are evenly distributed along the circumferential direction, and the heights of each equal-height sleeve are the same; The top of the equal-height sleeve is provided with an eversion edge, and the bottom surface of the eversion edge stops and cooperates with the top surface of the upper die plate. 10. The method for stamping the convex part of the wheel cover, which is characterized in that: two symmetrical blank placement positions are set on the lower die assembly of the stamping die for the convex part of the wheel cover, and the two blank placement positions are used for the opening of the two arc-shaped blanks. They are placed opposite or opposite to form two arc-shaped blanks at the same time in one punch of a punching die for the raised part of the wheel house.

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