CN211888574U - Stamping part forming device - Google Patents

Abstract

The embodiment of the application discloses stamping part forming device for become the stamping part with the sheet material shaping, including stamping die and forming die. The stamping die comprises a stamping part, the stamping part is convexly arranged on the surface of the stamping die, which is just opposite to the forming die, the forming die comprises a forming part matched with the stamping part, the forming part is concavely arranged on the surface of the forming die, which is just opposite to the stamping part, the sheet is placed on the forming die, and the outer side wall of the stamping part and the inner side wall of the forming part clamp the sheet when the sheet is stamped by the stamping die so as to prevent the sheet from moving during pressing operation.

Description

Stamping part forming device

Technical Field

The application relates to the technical field of manufacturing, especially, relate to a stamping workpiece forming device.

Background

In the automobile development process, each part needs to be verified for multiple times, wherein the development period of the automobile part sample is short. For example, soft mold verification needs to be developed in the development process of automobile body sheet metal parts, and because the development period of the soft mold is relatively short, when developing punching type parts (such as automobile body sheet metal parts), springback and the correction times of springback need to be reduced as much as possible, and the sampling period of the soft mold needs to be shortened.

At present, stamping parts are mainly manufactured and molded by adopting a forming die to perform drawing molding and direct molding after blanking on a metal plate, but the metal plate used by the parts is not fully extended, and the used material is a high-strength metal plate, so that the formed parts have large rebound and distortion, the rebound compensation needs to be performed for many times, and the molded surface of the die is continuously changed to correct the rebound of the parts. Therefore, the existing forming die not only increases the manufacturing cost of the part in the part verification process, but also prolongs the sampling period of the part and increases the research and development cost.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the application provides a stamping part forming device, which can fully extend a metal plate in the forming process of a stamping part, reduce the resilience of parts and shorten the sampling period of the parts.

An embodiment of the present application provides a stamping workpiece forming device for be the stamping workpiece with the sheet material shaping, stamping workpiece forming device includes: stamping die and forming die, wherein, stamping die includes punching press portion, protruding locating of punching press portion stamping die is just right forming die's surface, forming die include with punching press portion assorted shaping portion, the concave locating of shaping portion forming die is just right the surface of punching press portion, the sheet material place in on forming die, the lateral wall of punching press portion with the inside wall of shaping portion is in stamping die is the centre gripping during the sheet material is in order to prevent the sheet material takes place to remove during pressfitting operation.

In one embodiment of the application, the stamping part comprises a groove and a supporting part located on the periphery of the groove, the groove is concavely arranged on the surface of the stamping part facing the forming die, and the supporting part is a convex structural part protruding towards the direction of the forming die; the diapire epirelief of shaping portion is equipped with just right the punching press of recess is protruding, the diapire is located the bellied week side of punching press, the bellied shape of punching press and size with the shape and the size phase-match of recess, support the shape and the size of holding with by the inside wall the diapire and the shape and the size phase-match of the bellied accommodation space that forms of punching press.

In an embodiment of the application, the protruding orientation that is equipped with in bottom surface of recess forming die's at least one location lug, the protruding top surface of punching press is concave to be equipped with and keeps away from at least one positioning groove of punching press mould direction, positioning groove's size and shape with positioning lug's size and shape phase-match.

In an embodiment of the present application, the abutting member includes a stamping matching surface, a stamping arc surface, a pressing surface, a stamping auxiliary surface, and an auxiliary arc surface, the stamping matching surface and the pressing surface are connected by the stamping arc surface in a smooth transition manner, and the pressing surface and the stamping auxiliary surface are connected by the auxiliary arc surface in a smooth transition manner; the stamping matching surface is connected to the stamping side surface of the groove, and the stamping side surface is connected to the peripheral side of the bottom surface of the groove.

In an embodiment of the application, the punching press cambered surface with supplementary cambered surface is the arc surface that the radius is the same, the bottom surface with form first angle between the punching press side, the punching press side with form the second angle between the punching press fitting surface.

In an embodiment of the present application, the stamping auxiliary surface, the stamping matching surface, and the bottom surface are parallel to each other, and a distance between the bottom surface and the stamping matching surface is smaller than a distance between the stamping auxiliary surface and the stamping matching surface.

In an embodiment of the present application, the bottom wall includes a molding matching surface, a molding extrusion surface, a molding arc surface, a molding auxiliary surface, and a matching arc surface, and the molding matching surface and the molding extrusion surface are connected by the molding arc surface in a smooth transition manner; the forming extrusion surface and the forming auxiliary surface are in smooth transition connection through the matching cambered surface; the top surface with form the third angle between the shaping side, the shaping side with form the fourth angle between the shaping fitting surface.

In an embodiment of the present application, the molding auxiliary surface, the molding matching surface, and the top surface are parallel planes, and a distance between the top surface and the molding matching surface is smaller than a distance between the molding auxiliary surface and the molding matching surface.

In an embodiment of the present application, the shaping extrusion face has constituted the inside wall surface of shaping portion, the extrusion face has constituted the outside wall surface of punching press portion, the extrusion face with vertical direction is parallel to each other between the shaping extrusion face.

In an embodiment of the present application, the top surface with highly be first height between the lower surface of sheet material, first height value range is: more than or equal to 2 times of the thickness of the plate and less than or equal to 2.5 times of the thickness of the plate; the radius of the stamping arc surface and the radius of the auxiliary arc surface have the value ranges: the thickness of the plate is more than or equal to the thickness of the plate and less than or equal to 1.5 times of the thickness of the plate.

Compared with the prior art, the stamping part forming device disclosed in the embodiment of the application enables the metal plate to be fully extended by limiting the inflow of external materials in the part forming process, reduces the rebound times of parts, and shortens the sampling period of the parts and reduces the research and development cost in the part sample making process.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a stamping part forming apparatus according to an embodiment of the present application before stamping a sheet material;

FIG. 2 is a schematic cross-sectional view of a sheet formed into a stamping using the stamping forming apparatus shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a stamping shown in FIG. 1 as it is opened after forming the stamping;

fig. 4 is a schematic diagram of a stamping formed using the stamping forming apparatus shown in fig. 3.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be implemented by the application. The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). Directional phrases used in this application, such as, for example, "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the appended drawings and are, therefore, used herein for better and clearer illustration and understanding of the application and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. It should be noted that the terms "first", "second", and the like in the description and claims of the present application and in the drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic cross-sectional view of a stamping part forming apparatus 10 according to an embodiment of the present invention before a sheet material 300 is formed by stamping, and fig. 2 is a schematic cross-sectional view of a stamping part 400 formed after the sheet material 300 is formed by using the stamping part forming apparatus 10 shown in fig. 1. The stamping part forming device 10 is used for manufacturing stamping parts of stamping forming type, such as soft die parts, and is mainly used for soft die manufacturing in the previous development process of parts.

In the embodiment of the present application, the stamping part forming apparatus 10 includes a stamping die 100 and a forming die 200, wherein the stamping die 100 and the forming die 200 are pressed together by a functional device (e.g., a driving motor, a transmission device, a guiding device, etc.) to stamp the sheet material 300 into a stamping part with a predetermined shape. The sheet 300 is located between the stamping die 100 and the forming die 200. It is understood that the above-mentioned driving motors, transmission devices, guiding devices, and other functional devices may also be integrated into the stamping die 100 and/or the forming die 200.

The stamping die 100 comprises a stamping part 110, and the stamping part 110 is convexly arranged on the surface of the stamping die 100 facing the forming die 200. The stamping part 110 includes a groove 120 and a supporting member 130 located on the circumferential side of the groove 120, the groove 120 is recessed on the surface of the stamping part 110 aligned with the forming mold 200, that is, the groove 120 is recessed on the surface of the stamping part 110 along the direction away from the forming mold 200. The holding member 130 is a convex structure protruding toward the forming mold 200. The holding member 130 includes a press mating surface 131, a press curved surface 133, a pressing surface 132, a press auxiliary surface 134, and an auxiliary curved surface 135.

The bottom surface 121 of the groove 120 is protruded with a positioning projection 122 facing the molding die 200. Further, a first angle θ 1 is formed between the bottom surface 121 and the stamping side surface 123 of the groove 120, a second angle θ 2 is formed between the stamping side surface 123 and the stamping mating surface 131 of the holding member 130, the bottom surface 121 and the stamping side surface 123 form an inner surface of the groove 120, the stamping mating surface 131 is a partial surface of the stamping part 110, which is not recessed to form the groove 120, and the stamping side surface 123 is connected to the peripheral side of the bottom surface of the groove 120. A punching arc surface 133 with a radius R1 is formed between the punching matching surface 131 and the pressing surface 132 of the holding member 130, that is, the punching matching surface 131 and the pressing surface 132 of the holding member 130 are smoothly and transitionally connected by the punching arc surface 133 with a radius R1. An auxiliary arc surface 135 with a radius of R2 is formed between the pressing surface 132 and the pressing auxiliary surface 134 of the holding member 130, that is, the pressing surface 132 and the pressing auxiliary surface 134 of the holding member 130 are smoothly and transitionally connected by the auxiliary arc surface 135 with a radius of R2. The press mating surface 131, the press curved surface 133, the pressing surface 132, the auxiliary curved surface 135, and the press auxiliary surface 134 form an outer surface of the abutting member 130, wherein the pressing surface 132 constitutes an outer side wall surface of the press portion 110. It is understood that in other embodiments, the outer surface of the abutting member 130 may also be formed by the stamping matching surface 131, the stamping arc surface 133, the pressing surface 132 and the auxiliary arc surface 135, wherein the stamping auxiliary surface 134 is a part of the surface of the stamping die 100 that does not protrude to form the stamping portion 110. In this embodiment, the abutting elements 130 located on the circumferential side of the groove 120 are symmetrical in shape, that is, they are structural elements with the same size, shape and structure. The radius R1 is a punching radius, and the radius R2 is an auxiliary radius.

In this embodiment, the pressing auxiliary surface 134, the pressing mating surface 131, and the bottom surface 121 are parallel planes, and the distance between the bottom surface 121 and the pressing mating surface 131 is smaller than the distance between the pressing auxiliary surface 134 and the pressing mating surface 131 with the pressing mating surface 131 as a reference surface. The bottom surface 121 is provided with at least one positioning protrusion 122, and the positioning protrusion 122 may be in a regular three-dimensional shape, such as a sphere, a circular truncated cone, a triangular prism, or a rectangular parallelepiped, or in other irregular shapes. The first angle theta 1 is the same as the second angle theta 2 in magnitude. The punching arc surface 133 and the auxiliary arc surface 135 may be arc surfaces with the same radius, or may be arc surfaces with different radii, that is, the radius R1 may be equal to the radius R2, or may not be equal to the radius R2.

In other embodiments of the present disclosure, the bottom surface 121 is located between the pressing auxiliary surface 134 and the pressing mating surface 131, and the bottom surface 121 and the pressing auxiliary surface 134 may not be parallel to each other, when the bottom surface 121 and the pressing auxiliary surface 134 are not parallel to each other, the first angle θ 1 is different from the second angle θ 2, and the abutting element 130 located on the periphery of the groove 120 is a structural member with different size and shape structure.

Referring to fig. 1 and fig. 2, the forming mold 200 includes a forming portion 210, the forming portion 210 is recessed on a surface of the forming mold 200 aligned with the stamping portion 110, that is, the forming portion 210 is recessed on a surface of the forming mold 200 in a direction away from the stamping mold 100, and a shape and a size of the forming portion 210 match a shape and a size of the stamping portion 110. The bottom wall 230 of the forming portion 210 is provided with a stamping protrusion 220 aligned with the groove 120, the shape and size of the stamping protrusion 220 are matched with those of the groove 120, specifically, the bottom wall 230 is located on the peripheral side of the stamping protrusion 220, and the shape and size of the abutting piece 130 are matched with those of the inner side wall of the forming portion 210, the bottom wall 230 and the accommodating space formed by the stamping protrusion 220. The bottom wall 230 includes a contoured mating surface 231, a contoured pressing surface 232, a contoured arc surface 133, a contoured auxiliary surface 234, and a mating arc surface 235.

The stamping protrusion 220 protrudes towards the stamping die 100, and the top surface 221 of the stamping protrusion 220 is recessed with a positioning groove 222 in a direction away from the stamping die 100, specifically, the positioning groove 222 and the positioning protrusion 122 have the same size, structure and shape, and are matched with each other. Further, an angle formed between the top surface 221 and the forming side surface 223 of the stamping protrusion 220 is a third angle θ 3, a fourth angle θ 4 is formed between the forming side surface 223 and the forming mating surface 231 of the bottom wall 230, and the forming mating surface 231 and the forming pressing surface 232 of the forming portion 210 are smoothly and transitionally connected by a forming arc surface 233 with a radius R1. The molding pressing surface 232 and the molding auxiliary surface 234 of the molding part 210 are smoothly transited by a matching arc surface 235 with a radius R2. The top surface 221 and the profiled side surface 223 form the outer surface of the stamped projection 220. The molding pressing surface 232 constitutes an inner sidewall surface of the molding portion 210. In this embodiment, the bottom walls 230 on both sides of the stamping protrusion 220 are symmetrical to each other, i.e. they are structural members with the same size and shape.

In the present embodiment, the shape and size of both the stamped part 110 and the formed part 210 match. The molding auxiliary surface 234, the molding mating surface 231, and the top surface 221 are planes parallel to each other, and the distance between the top surface 221 and the molding mating surface 231 is smaller than the distance between the molding auxiliary surface 234 and the molding mating surface 231, with the molding mating surface 231 as a reference surface. The top surface 221 is provided with at least one positioning groove 222, and the shape and size of the positioning groove 222 are matched with the shape and size of the positioning lug 122, so that the positioning groove 222 and the positioning lug 122 are mutually embedded. The third angle theta 3 is the same size as the fourth angle theta 4. The molding arc surface 233 and the fitting arc surface 235 may be arc surfaces with the same radius or arc surfaces with different radii.

Preferably, the pressing surface 132 and the molding pressing surface 232 are vertically parallel to each other. The first angle theta 1 is the same as the third angle theta 3, and the second angle theta 2 is the same as the fourth angle theta 4.

In other embodiments of the present invention, the top surface 221 is located between the molding auxiliary surface 234 and the molding mating surface 231, and the three may not be parallel to each other, when the molding top surface 221 is not parallel to the molding auxiliary surface 234, the third angle θ 3 is different from the fourth angle θ 4, and the bottom walls 230 located on both sides of the stamping protrusion 220 may be structural members with different sizes and shapes.

The slab 300 includes an upper surface 301 and a lower surface 302, the slab 300 having a thickness t. When the lower surface 302 is located on the molding auxiliary surface 234 of the molding die 200, the height between the lower surface 302 and the top surface 221 is the first height H1. In order to ensure that the plate 300 is fully extended and rebound is reduced when the plate 300 is stamped, the first height H1 ranges from 2t to 2.5t, the radius R1 and the radius R2 range from t to 1.5t, the positioning protrusion 122 and the positioning groove 222 are mutually embedded, and the shapes of the positioning protrusion 122 and the positioning groove 222 can be determined according to the shape of the plate 300, wherein the plate 300 can be made of a metal material and a malleable non-metal material.

Referring to fig. 2, fig. 2 is a schematic cross-sectional view of a stamping part 400 formed by forming a sheet material 300 by using the stamping part forming apparatus 10 shown in fig. 1. As shown in fig. 2, the slab 300 is previously placed on the forming auxiliary surface 234 of the forming die 200. The pressing operation of the stamping die 100 towards the forming die 200 is started according to the external acting force, in the moving process of the stamping die 100, the stamping matching surface 131 of the stamping part 130 firstly contacts the upper surface 301 of the plate 300, the plate 300 is extruded towards the forming part 210 of the forming die 200, then the positioning lug 122 of the stamping part 130 contacts the upper surface 301 of the plate 300, the plate 300 is continuously extruded towards the forming part 210 of the forming die 200, and under the action of the stamping matching surface 131 and the positioning lug 122, the phenomenon that the plate 300 moves in the stamping process to cause uneven stress on the plate 300 can be prevented.

With the continuous pressing operation of the stamping die 100, the sheet material 300 is clamped between the pressing surface 132 and the forming pressing surface 232, that is, the sheet material 300 is clamped between the outer side wall of the stamping part 110 and the inner side wall of the forming part 210 to prevent the sheet material from moving during the pressing operation, and is also used for preventing other materials from entering the sheet material 300 during the stamping process and influencing the self ductility of the sheet material 300 during the matching stamping process of the stamping part 110 and the forming part 210. The other material may be scrap iron. The punching part 110 of the punching die 100 is completely in contact with the upper surface 301 of the sheet 300, and the forming part 210 of the forming die 200 is completely in contact with the lower surface 302 of the sheet 300. After the sheet material 300 is completely punched into the stamping 400, the lowering of the punching die 100 is stopped.

In the embodiment of the present application, before the sheet material 300 is stamped into the stamping part 400, the sheet material 300 is clamped between the stamping die 100 and the forming die 200 by the pressing surface 132 of the stamping die 100 and the forming pressing surface 232 of the forming die 200, so that the influence of other materials such as iron filings on the stamping of the sheet material 300 is eliminated, and the ductility of the sheet material 300 is completely relied on. Therefore, the sheet material 300 is effectively stretched, and after the sheet material 300 is punched and formed into the stamping part 400, and after the stamping die 100 and the forming die 200 are opened, the formed parts rebound less, and the stability of the parts is improved.

In another embodiment of the present invention, the sheet material 300 is placed on the forming auxiliary surface 234 of the forming die 200 in advance, and the forming die 200 starts the pressing operation toward the stamping die 100 by the external force until it is completely contacted with the stamping die 100. During the movement of the stamping die 100, the sheet material 300 is clamped between the pressing surface 132 and the forming pressing surface 232, that is, the sheet material 300 is clamped between the outer side wall of the stamping part 110 and the inner side wall of the forming part 210 to prevent the sheet material from moving during the pressing operation, and to prevent other materials, such as iron filings, from entering during the stamping process of the sheet material 300. After the sheet 300 is fully contacted with the stamping die 100 and the forming die 200, the forming die 200 stops rising after the first time T1 and maintains its position until the sheet 300 is stamped into the stamping 400. The first time T1 is a preset time, and the value range thereof can be determined according to the elastic parameter of the material of the plate 300 itself.

Referring to fig. 3 and 4, fig. 3 is a schematic sectional view of a stamped part formed by the stamping part forming apparatus shown in fig. 1 and then opened, and fig. 4 is a schematic structural view of a stamped part formed by the stamping part forming apparatus shown in fig. 3. As shown in fig. 3, after the stamping part 400 is stamped by the stamping die 100 and the forming die 200, the lower surface of the stamping part 400 is closely attached to the forming portion of the forming die 200, and the stamping part 400 is formed into a predetermined part shape. The stamping 400 includes a connection portion 410 and recess portions 420 at both sides of the connection portion 410. The connecting portion 410 and the recessed portion 420 have the same connecting relationship and dimensional structure as those of the molding portion of the molding die 200.

As shown in fig. 4, a schematic structural diagram of the stamping part 400 is shown. The stamping part 400 formed by stamping the plate 300 can be applied to a battery or a battery pack anti-collision part in an automobile part, and the stamping part 400 is not influenced by external materials during stamping and is stamped into the stamping part 400 by the extension of the plate 300. Therefore, the plate 300 is fully extended during punch forming, the rebound of the stamping part 400 is reduced, the development period of the stamping part 400 is shortened, and the stability of the stamping part 400 is improved.

The stamping part forming device disclosed in the embodiment of the present application is described in detail above, and the principle and the implementation of the present application are explained in the present application by applying specific examples, and the description of the above embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. A stamping part forming device is used for forming a plate material into a stamping part and is characterized by comprising a stamping die and a forming die, wherein,

the stamping die comprises a stamping part, wherein the stamping part is convexly arranged on the surface of the stamping die, which is just opposite to the forming die, the forming die comprises a forming part matched with the stamping part, the forming part is concavely arranged on the surface of the forming die, which is just opposite to the stamping part, the plate is placed on the forming die, and the outer side wall of the stamping part and the inner side wall of the forming part are used for clamping the plate when the plate is stamped by the stamping die so as to prevent the plate from moving during pressing operation.

2. The stamping forming apparatus according to claim 1, wherein the stamping portion includes a groove and an abutting member located around the groove, the groove is recessed in a surface of the stamping portion facing the forming die, and the abutting member is a convex structural member protruding in a direction of the forming die;

the diapire epirelief of shaping portion is equipped with just right the punching press of recess is protruding, the diapire is located the bellied week side of punching press, the bellied shape of punching press and size with the shape and the size phase-match of recess, support the shape and the size of holding with by the inside wall the diapire and the shape and the size phase-match of the bellied accommodation space that forms of punching press.

3. The stamping forming device as claimed in claim 2, wherein the bottom surface of the groove is provided with at least one positioning projection protruding towards the forming die, the top surface of the stamping protrusion is provided with at least one positioning groove recessed away from the stamping die, and the size and shape of the positioning groove are matched with those of the positioning projection.

4. A stamping part forming device according to claim 3, wherein the abutting part comprises a stamping matching surface, a stamping arc surface, a pressing surface, a stamping auxiliary surface and an auxiliary arc surface, the stamping matching surface and the pressing surface are in smooth transition connection through the stamping arc surface, and the pressing surface and the stamping auxiliary surface are in smooth transition connection through the auxiliary arc surface; the stamping matching surface is connected to the stamping side surface of the groove, and the stamping side surface is connected to the peripheral side of the bottom surface of the groove.

5. The stamping forming apparatus of claim 4, wherein the stamping arc surface and the auxiliary arc surface are arc surfaces having the same radius, the bottom surface and the stamping side surface form a first angle therebetween, and the stamping side surface and the stamping mating surface form a second angle therebetween.

6. A stamping forming apparatus as claimed in claim 4, wherein the stamping auxiliary surface, the stamping mating surface and the bottom surface are parallel to each other, and the distance between the bottom surface and the stamping mating surface is smaller than the distance between the stamping auxiliary surface and the stamping mating surface.

7. The stamping forming device of claim 5, wherein the bottom wall includes a forming mating surface, a forming extrusion surface, a forming arc surface, a forming auxiliary surface and a mating arc surface, and the forming mating surface and the forming extrusion surface are smoothly transitionally connected by the forming arc surface; the forming extrusion surface and the forming auxiliary surface are in smooth transition connection through the matching cambered surface; the top surface with form the third angle between the shaping side, the shaping side with form the fourth angle between the shaping fitting surface.

8. A stamping forming apparatus as claimed in claim 7, wherein the forming auxiliary surface, the forming mating surface and the top surface are parallel planes, and the distance between the top surface and the forming mating surface is smaller than the distance between the forming auxiliary surface and the forming mating surface.

9. A stamping forming apparatus as claimed in claim 7, wherein the forming press face forms an inner side wall surface of the forming section and the press face forms an outer side wall surface of the stamping section, the press face and the forming press face being vertically parallel to each other.

10. A stamping forming apparatus as claimed in claim 5, wherein the height between the top surface and the lower surface of the sheet material is a first height, the first height being in the range: more than or equal to 2 times of the thickness of the plate and less than or equal to 2.5 times of the thickness of the plate;

the radius of the stamping arc surface and the radius of the auxiliary arc surface have the value ranges: the thickness of the plate is more than or equal to the thickness of the plate and less than or equal to 1.5 times of the thickness of the plate.

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