CN108971344A - Stamping compound die and stamping machine - Google Patents

Abstract

The invention discloses a stamping composite die, comprising: an upper die set, the upper die set includes an upper die base, an upper convex and concave die fixed on the upper die base, and a blank holder connected to the upper die base through a buffer, The blank holder ring is set on the upper convex and concave die; the lower die set, the lower die set includes the lower mold base, the ring-shaped flanging die fixed on the lower die base, and the lower convex and concave die that slide and fit with the inner wall of the flanging die ring, The cross section of the upper convex and concave mold is matched with the ring inner wall of the flanging concave mold so as to be able to extend into the flanging concave mold. At this time, the upper convex and concave dies are pressed down to form the middle part of the workpiece to be formed in cooperation with the lower convex and concave dies, and then the upper convex and concave dies continue to press down, and the upper convex and concave dies are matched with the inner wall of the ring exposed by the flanging die, and then Flanging is formed, and after the flanging is formed, the lower convex and concave dies can be moved upwards, and then the formed workpiece can be pushed upward to facilitate the removal of the formed workpiece. The invention also discloses a punching machine comprising the above-mentioned punching compound mold.

Description

Stamping compound die and stamping machine

technical field

The present invention relates to the technical field of stamping equipment, more specifically, to a stamping compound die, and also to a stamping machine including the stamping compound die.

Background technique

At present, the cold stamping process for the outer edge flanging, center flanging, bottom with bumps and high forming precision of the rotary disc parts are: blanking, punching, flanging, pressing, embossing, In the current processing plan, due to the poor compound function of the stamping die, each process is carried out separately, resulting in relatively long production lines and low efficiency.

To sum up, how to effectively solve the problem of poor composite function of the stamping die is an urgent problem for those skilled in the art.

Contents of the invention

In view of this, the first object of the present invention is to provide a stamping compound die, which can effectively solve the problem of poor compound function of the stamping die, and the second object of the present invention is to provide a stamping die comprising the above-mentioned Punching machine for composite dies.

In order to achieve the above-mentioned first object, the present invention provides the following technical solutions:

A stamping composite die, comprising:

The upper die set, the upper die set includes an upper die base, an upper convex and concave die fixed on the upper die base, and a blank holder connected to the upper die base through a buffer, and the blank holder is sleeved On the above-mentioned upper convex and concave mold;

The lower die set, the lower die set includes a lower die base, a ring-shaped flanging die fixed on the lower die base, and a lower convex die that slides with the inner wall of the flanging die ring. The cross section of the male and female dies is matched with the ring inner wall of the flanging die so as to be able to extend into the flanging die.

It can be known from the above technical scheme that by changing the connection relationship between the lower mold base and the lower convex and concave mold, the lower convex and concave mold can be moved upwards to the same height as the flanging concave mold. At this time, by pressing down the upper convex and concave mold, The middle part of the workpiece to be formed is stamped and formed in cooperation with the lower convex and concave dies. Then, as the upper convex and concave dies continue to press down, the corresponding lower convex and concave dies slide downward relative to the flanging dies. At this time, the upper convex and concave dies and the flanged concave dies The inner wall of the ring exposed by the mold cooperates, and then the above-mentioned formed parts are flanged and formed, and after the flanging is formed, the lower convex and concave molds can be moved upwards to push the formed workpiece to move upwards to facilitate the removal of the formed workpiece. In summary, the stamping compound die can effectively solve the problem of poor compound function of the stamping die.

Preferably, the lower die set is provided with a reaming punch which is located in the middle of the lower male and female die and relatively fixed to the lower die base, and the middle part of the upper male and female die is provided with a reversing hole that matches the reversing punch Groove, the upper side of the described hole turning punch is at the same height as the upper side of the flanging die.

Preferably, a positioning post for positioning the preformed hole is provided in the middle of the upper side of the hole turning punch.

Preferably, the upper convex and concave die is provided with an elastic pressing assembly, and the lower end of the elastic pressing assembly protrudes from the lower side of the upper convex and concave die.

Preferably, the lower molding surface of the upper convex and concave mold is provided with an annular raised portion, and the convex surface of the annular raised portion is uniformly provided with a plurality of molding grooves along the circumferential direction, and the lower convex and concave mold is provided with a An annular groove matched with the annular protrusion, and a forming protrusion matched with the forming die is arranged in the annular forming die.

Preferably, it also includes an upper backing plate arranged between the upper die base and the upper male and female die, the elastic pressing assembly includes a spring and a push pin, and the upper side of the upper male and female die is provided for placing the The installation groove of the spring, the one end of the push pin is connected with the spring and the other end is penetrated from the bottom of the installation groove to the underside of the upper convex and concave die, and the upper backing plate is covered on the upper convex and concave die on the upper side.

Preferably, the flanging die and the lower mold base are positioned and fixed by the positioning pins extending up and down, and fixedly connected by the screw rods extending up and down. The spigot on the base is positioned and fixedly connected by the screw rod extending up and down, the upper mold base and the lower mold base are both provided with a lifting arm, and a guide hole is arranged in the upper mold base, and a guide hole is set in the guide hole. There is a guide sleeve, and a guide post which is slidably matched with the guide sleeve is fixed on the lower mold base.

Preferably, it also includes a lower backing plate connected to the lower side of the lower male and female mold and a ejector pin whose upper end is against the lower side of the lower backing plate, and the ejector pin penetrates to the lower side of the lower mold seat.

Preferably, it also includes a pre-compression elastic device arranged between the lower die base and the lower concave-convex die, the pre-compressed elastic device can push the lower convex die to be equal to the flange die and can Compress until the lower convex and concave molds move downward to expose the flanging die to expose the inner wall of the ring for flanging forming.

In order to achieve the above-mentioned second purpose, the present invention also provides a stamping machine, which includes any one of the above-mentioned stamping composite molds, and also includes a stamping driving end and a workbench, and the upper mold base of the stamping composite mold is installed on The upper and lower mold bases of the stamping driving end are installed on the workbench, and an air cushion is arranged between the workbench and the lower convex and concave dies of the stamping compound mold. Since the above-mentioned composite stamping die has the above-mentioned technical effects, the stamping machine with the composite stamping die should also have corresponding technical effects.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the schematic structural view of the stamping composite mold after the stamping and forming of the workpiece provided by the embodiment of the present invention;

Fig. 2 is a structural schematic diagram of a stamping composite mold before stamping and forming of a workpiece provided by an embodiment of the present invention;

Fig. 3 is a schematic structural view of the stamping composite mold before stamping forming under the state of compressing the workpiece provided by the embodiment of the present invention;

Fig. 4 is a structural schematic diagram of the stamping composite mold in the flanging forming after the middle stamping forming provided by the embodiment of the present invention;

Fig. 5 is the structural representation of workpiece to be formed;

Fig. 6 is the schematic diagram of the cross-sectional structure of the workpiece after molding;

Figure 7 is a schematic view of the structure of the workpiece after molding.

The marks in the attached drawings are as follows:

Upper mold base 1, upper convex and concave mold 2, blank holder ring 3, buffer 4, lower mold base 5, flanging concave mold 6, lower convex and concave mold 7, turning hole punch 8, turning hole groove 9, positioning column 10, upper Backing plate 11, spring 12, ejector pin 13, lifting arm 14, guide sleeve 15, guide column 16, lower backing plate 17, ejector rod 18, forming protrusion 19, workpiece to be formed 20, upper die set 100, lower die Group 200.

Detailed ways

The embodiment of the invention discloses a stamping compound die to effectively solve the problem of poor compound function of the stamping die.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1-Fig. 7, Fig. 1 is the schematic structural diagram of the stamping composite mold after the workpiece stamping forming provided by the embodiment of the present invention; Fig. 2 is the structural schematic diagram of the stamping composite mold before the workpiece stamping forming provided by the embodiment of the present invention; Fig. 3 The structural schematic diagram of the stamping composite mold before stamping forming under the state of compressing the workpiece provided by the embodiment of the present invention; FIG. 4 is the structural schematic diagram of the stamping composite mold in the flange forming after the middle stamping forming provided by the embodiment of the present invention; FIG. 5 Fig. 6 is a schematic diagram of the structure of the workpiece to be formed; Fig. 6 is a schematic diagram of the cross-sectional structure of the workpiece after molding; Fig. 7 is a schematic diagram of the structure of the workpiece after molding.

In a specific embodiment, this embodiment provides a stamping composite die, specifically, the stamping composite die includes an upper die set 100 and a lower die set 200, which are mainly used to be installed on a stamping machine, that is, a press machine, wherein The upper die set 100 is installed on the stamping driving end of the press, and the lower die set 200 is installed on the workbench of the press, and the stamping driving end drives the upper die set 100 to press down and move to cooperate with the upper die set 100 function, and then carry out stamping forming such as outer edge flanging and stamping deformation of the workpiece.

The upper die set 100 generally includes an upper die base 1, an upper convex and concave die 2, a blank holder 3, a buffer 4, etc., wherein the upper die base 1 is used to be installed on the stamping driving end of the press.

The lower die set 200 generally includes a lower die base 5, a lower convex and concave die 7, a flanging die 6, a hole turning punch 8, etc., wherein the lower die base 5 is used to be fixedly installed on the workbench of the press.

Wherein the blank holder ring 3 is sleeved on the outer side of the upper convex and concave die 2, and the corresponding flange die 6 is annular, and the upper end surface is matched with the lower end surface of the above blank holder ring 3, so as to squeeze the flange of the workpiece to be formed. department. Wherein, the blank holder 3 is connected with the upper mold base 1 through a buffer 4, and the elastic compression direction of the buffer 4 is the up and down direction. The buffer 4 can be a spring or an elastic body, which can be set as required. The buffer 4 controls the extrusion force between the flange holder 3 and the flange die 6 to ensure that the flange gradually moves laterally to the inner side of the flange die 6 for forming. When the buffer 4 is in a natural state, the lower surface of the blank holder 3 is at the same height as the lower base of the upper convex and concave die 2,

Wherein the lower convex and concave die 7 is positioned at the inner side of the flanging die 6, and is slidably matched with the flanging die 6, so that the upper surface can be moved upward to the same height as the flanging die 6, and can also be moved downward to the bottom to make the flanging The ring inner wall of the edge die 6 is exposed to guide the stamping parts to be flanged.

Wherein the upper convex and concave mold 2 is fixedly installed on the upper mold base 1, wherein the cross section of the upper convex and concave mold 2 matches the ring inner wall cross section of the flanging die 6, so as to be able to extend into the flanging die 6. When the lower convex and concave mold 7 moves down to the bottom, when the corresponding upper convex and concave mold 2 moves downward, through the cooperation between the outer wall of the upper convex and concave mold 2 and the ring inner wall of the flanging concave mold 6, the stamping parts to be stamped are flanged and stamped .

And the lower mold surface of the upper convex and concave mold 2 cooperates with the upper mold surface of the lower convex and concave mold 7 to work together to extrude the middle part of the molded part. The forming of the middle part is mainly to form grooves or protrusions. For example, a protrusion is provided on the lower side of the upper convex and concave die 2, and correspondingly, a concave portion is provided on the upper side of the lower convex and concave die 7 to cooperate with each other, that is, in the workpiece to be formed. Forming grooves are punched out in the middle of the . It is also possible to set the concave part on the convex end face of the convex part of the upper convex and concave mold 2, and correspondingly, set the convex part at the bottom of the concave part of the lower convex and concave mold 7 to ensure that the upper convex and concave mold 2 and the lower convex and concave mold 7 co-operate.

When in use, the lower convex and concave die 7 is indirectly installed on the air cushion of the punching machine. After the above-mentioned stamping composite mold is installed on the punching machine, one end of the air cushion is relatively fixed with the lower die base 5, and the other end is opposite to the lower convex and concave die 7. Fixed, relatively fixed does not necessarily mean a fixed connection, and the two can also be relatively fixed with their own gravity. Of course, it is also possible to arrange other pre-compressed elastic devices between the lower convex and concave mold 7 and the lower mold base 5, and push the lower convex and concave mold 7 to move upward to the same height as the upper side of the flanging concave mold 6 through the pre-compressed elastic device. The non-forming part of the lower convex and concave mold 7 can also be considered as the highest point of the lower convex and concave mold 7 .

During the stamping process, the lower convex and concave die 7 and the upper convex and concave die 2 are gradually approaching. Due to the effect of the pre-compression elastic device, the lower convex and concave die 7 and the lower die base 5 remain relatively fixed. At this time, the lower convex and concave die 7 and the upper convex and concave die 2 Gradually approach to gradually squeeze the part to be formed to form the middle part to form the middle part. At this moment, the blank holder ring 3 follows the upper die base 1 and moves to the upper edge of the flanging die 6 to abut. As the stamping force increases, the upper convex and concave mold 2 pushes the lower convex and concave mold 7 to press down the pre-compression elastic device to compress and deform, and the lower convex and concave mold 7 moves downward to gradually expose the ring inner wall of the flanging concave mold 6 to gradually perform flanging forming. To form the flanging molding, and through the elastic extrusion of the upper side of the flange holder ring 3 and the flange die 6, the flanging process is effectively avoided, and the flanging is arbitrarily moved. After the molding is completed, the upper mold set 100 is lifted, and under the action of the pre-compression buffer 4, the lower concave-convex mold is pushed upward to the same height as the flanging concave mold 6, and then the molded part is pushed out.

It can be known by the above technical scheme that by changing the connection relationship between the lower mold base 5 and the lower convex and concave mold 7, when the lower convex and concave mold 7 can be moved upwards to the same height as the flanging concave mold 6, at this time by pressing down The upper convex and concave mold 2 is used to press and form the middle part of the workpiece 20 to be formed in cooperation with the lower convex and concave mold 7, and then, as the upper convex and concave mold 2 continues to press down, the corresponding lower convex and concave mold 7 slides downward relative to the flanging concave mold 6 At this time, the upper convex and concave mold 2 cooperates with the inner wall of the ring exposed by the flanging concave mold 6, and then the above-mentioned molded parts are flanged and formed, and after the flanging is formed, the lower convex and concave mold 7 can be moved upwards to push The formed workpiece moves upwards to facilitate the removal of the formed workpiece. In summary, the stamping compound die can effectively solve the problem of poor compound function of the stamping die.

In order to further improve the composite function of the stamping composite die to improve work efficiency. Here, preferably, a punching die is integrated on the stamping composite die. Wherein, the hole-turning forming die refers to the hole-side-turning for the punching hole, that is, the hole-turning side. Based on this, preferably among the lower die set 200 and the upper die set 100 , one is provided with a reaming punch 8 , and the other is provided with a reaming groove 9 matched with the reaming punch 8 . For example, the lower die set 200 can be provided with a hole-turning punch 8 positioned at the middle of the lower punch and die 7 and relatively fixed with the lower die base 5, and the middle part of the upper punch and die 2 is provided with a hole-turning groove 9 that matches the hole-turning punch 8, The upper side of the hole-turning punch 8 is equal to the upper side of the flanging die 6, so that the flanging and the turning of the hole are carried out simultaneously, and then the punching is guaranteed. In order to carry out hole turning better, it is preferred that the upper side of the hole turning punch 8 is spherical in order to reduce the impact of the workpiece to be formed.

Further, in order to avoid the stamping parts from deviating from the current position, it is necessary to position the stamping parts. For better positioning, it is preferable to set a positioning column 10 for positioning the preformed hole in the middle of the upper side of the hole-turning punch 8, which is not only convenient for positioning, but also does not interfere with the entire stamping process, greatly improving the stamping effect. Especially for the disc to be formed, not only is the positioning convenient, but the axis of the positioning column 10 is the axis of the disc, making the positioning more accurate.

During the stamping process, it is difficult to avoid irregular vibration during the operation of the machine. When there is lateral vibration, it is easy to cause the workpiece to move laterally, which in turn leads to offset. Based on this, an elastic compression assembly is preferably provided here, specifically, an elastic compression assembly is provided on the upper convex and concave mold 2, specifically, the elastic compression assembly should avoid the forming part of the upper convex and concave mold 2, so as to Avoid interference shaping. Wherein the lower end of the elastic compression assembly should protrude from the upper side of the upper convex and concave mold 2, so that, before the upper convex and concave mold 2 contacts the workpiece to be formed, the lower end of the elastic compression assembly is in advance against the upper end of the workpiece to be formed, so as to preliminarily Compress the workpiece to be formed, and use elastic compression components at the same time, wherein the elastic function is not to interfere with the downward movement of the upper convex and concave mold 2, and at the same time, it can also move downward with the upper convex and concave mold 2 to increase the downward force to better Avoid shaking of the parts to be formed. Wherein the elastic pressing assembly, a relatively simple structure, may include a spring 12 and a pressing pin 13 .

Further, as mentioned above, there are many ways to form the upper convex and concave mold 2 and the lower convex and concave mold 7. A stamping composite mold with relatively large adaptability, preferably the lower molding surface of the upper convex and concave mold 2 is provided with An annular protrusion, and a plurality of molding grooves are evenly arranged in the circumferential direction on the convex surface of the annular protrusion, and the lower convex and concave mold 7 is provided with an annular groove matching the annular protrusion, the annular The forming die is provided with a forming protrusion 19 that matches the forming die, wherein the annular protrusion is matched with the annular groove, so that the annular forming groove can be punched out on the workpiece to be formed, and wherein the forming groove and the The forming protrusion 19 of the ring-shaped forming groove can be punched out inwardly extending salient points at the groove bottom of the annular forming groove. It should be noted that, correspondingly, it is preferred that the entire upper convex and concave mold 2 , the lower convex and concave mold 7 , the annular protrusion, the annular concave mold and the hole turning punch 8 are arranged coaxially.

Further, in order to better set the upper die set 100, it is preferred here to also include an upper backing plate 11 arranged between the upper die base 1 and the upper convex and concave die 2, and the elastic pressing assembly therein includes a spring 12 and When pressing the ejector pin 13, the upper side of the upper convex and concave die 2 is provided with an installation groove for placing the spring 12, one end of the ejector pin 13 is connected with the spring 12, and the other end is passed from the bottom of the installation groove to the lower side of the upper convex and concave die 2, wherein The upper backing plate 11 covers the upper side of the upper convex and concave mold 2 to seal the installation groove, and can also play the role of buffer protection, wherein the upper backing plate 11, the upper convex and concave mold 2 and the upper mold base 1 can be extended up and down bolts for connection.

Correspondingly, in order to better set the lower die set 200, preferably the flanging die 6 and the lower die base 5 are positioned and fixed by the positioning pins extending up and down, and are fixedly connected by the screw rods extending up and down, and the flanging punch 8 wherein It is positioned with the lower mold base 5 through the notch on the lower mold base and fixedly connected by the screw rod extending up and down.

In order to ensure the forming effect, the overall weight of the general stamping compound die is relatively large, and the weight of the upper die set 100 and the lower die set 200 is relatively large. Based on this, it is preferred that the upper die base 1 and the lower die base 5 are both equipped with lifting arms. 14. When the upper mold base 1 and the lower mold base 5 move towards each other, because they need to cooperate with each other, in order to ensure the matching accuracy, it is preferred that a guide hole is provided in the upper mold base 1 here, and a guide sleeve 15 is arranged in the guide hole, and the lower mold base 15 is provided with a guide hole. The mold base 5 is fixed with a guide post 16 which is slidingly matched with the guide sleeve 15 . The upper die set 100 and the lower die set 200 are positioned by slidingly fitting the guide post 16 with the guide sleeve 15 . Wherein the lower part of the guide sleeve 15 is provided with a shoulder to be connected with the lower side of the upper die base 1 by bolts or screws.

As mentioned above, the lower convex and concave mold 7 is slidably matched with the flanging concave mold 6, so that when the lower convex and concave mold 7 slides to different positions, different moldings are performed. As above, when sliding to the upper side and the same height as the flanging die 6, the middle part stamping is performed, and when the inner wall of the ring of the flanging die 6 is exposed following the upper convex die 2, the flanging is performed. The position switch between the lower convex and concave mold 7 relative to the lower mold base 5 can be driven by a driving device, or can be connected between the lower mold base 5 and the lower convex and concave mold 7 through a pre-compressed elastic device. The general stamping machine is provided with an air cushion, which can play the same role as the pre-compression elastic device. In order to make better use of the air cushion on the stamping machine, it is preferable to also include the lower backing plate 17 and the upper end connected to the lower side of the lower convex and concave die 7 here. The ejector pin 18 against the lower side of the lower backing plate 17 is pierced to the lower side of the lower mold base 5 , and generally a plurality of ejector pins 18 are arranged to evenly surround the axis of the lower male and female die 7 . Wherein the molding protrusion 19 can be a molded piece inserted upwardly in the lower convex and concave mold 7 from the lower side of the lower convex and concave mold 7 , and the upper end protrudes from the upper side of the lower convex and concave mold 7 to form the molding protrusion 19 .

Correspondingly, it may also include a pre-compression elastic device arranged between the lower mold base 5 and the lower concave-convex mold, which may be directly arranged between the lower mold base 5 and the lower concave-convex mold, or directly arranged between the workbench and the above-mentioned ejector pin 18, to indirectly transmit the compressive elastic force. The elastic device under pre-compression can promote the lower convex and concave mold 7 and the flanging concave mold 6 to be of the same height, so that the upper convex and concave mold 2 and the lower convex and concave mold 7 cooperate with each other to shape the middle part of the workpiece. Simultaneously, this pre-compressed elastic device can also be compressed to make the lower convex and concave mold 7 move downward to expose the ring inner wall of the flanging concave mold 6, so as to cooperate with the pressed upper convex and concave mold 2 to carry out flanging forming.

Based on the stamping composite die provided in the above-mentioned embodiments, the present invention also provides a punching machine, which includes any one of the stamping composite dies in the above-mentioned embodiments, and also includes a punching driving end and a workbench, and the stamping composite die The upper mold base is installed on the stamping driving end, the lower mold base is installed on the workbench, and an air cushion is arranged between the workbench and the lower convex and concave dies of the stamping compound mold. Since the stamping machine adopts the stamping compound die in the above-mentioned embodiment, please refer to the above-mentioned embodiment for the beneficial effects of the punching machine.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A stamping composite mold, characterized in that, comprising: An upper die set, the upper die set includes an upper die base (1), an upper convex and concave die (2) fixed on the upper die base (1), and a buffer between the upper die base (1) (4) a binder ring (3) connected, and the binder ring (3) is sleeved on the above-mentioned upper convex and concave die (2); Lower mold group, described lower mold group comprises lower mold base (5), is fixed on described lower mold base (5) and is ring-shaped flanging die (6), and described flanging die (6) The lower convex and concave mold (7) that is slidingly fitted on the inner wall of the ring, the cross section of the upper convex and concave mold (2) is matched with the inner wall of the ring of the flanged concave mold (6) so as to be able to extend into the flanged concave mold (6) )Inside. 2. The stamping composite die according to claim 1, characterized in that, the lower die set is provided with a hole-turning punch located in the middle of the lower convex die (7) and relatively fixed to the lower die base (5) (8), the middle part of the upper convex and concave die (2) is provided with a turning hole groove (9) matched with the turning hole punch (8), and the upper side of the turning hole punch (8) is in contact with the flange The upper side of die (6) is of equal height. 3. The stamping compound die according to claim 2, characterized in that, a positioning post (10) for positioning the pre-formed hole is arranged in the middle of the upper side of the hole-turning punch (8). 4. The stamping compound die according to claim 3, characterized in that, the upper convex and concave die (2) is provided with an elastic pressing assembly, and the lower end of the elastic pressing assembly protrudes from the upper convex and concave die (2) ) on the lower side of the setting. 5. The stamping compound die according to claim 4, characterized in that, the lower molding surface of the upper convex and concave die (2) is provided with an annular raised portion, and the convex surface of the annular raised portion is evenly arranged along the circumferential direction There are a plurality of forming grooves, the lower convex die is provided with an annular groove matching with the annular protrusion, and a forming protrusion matching with the forming die is arranged in the annular forming die (19). 6. The stamping composite die according to claim 5, further comprising an upper backing plate (11) arranged between the upper die base (1) and the upper convex and concave die (2), the The elastic compression assembly includes a spring (12) and a push pin (13), the upper side of the upper convex and concave die (2) is provided with a mounting groove for placing the spring (12), and one end of the push pin (13) is connected to the The spring (12) is connected, and the other end passes through the bottom of the installation groove to the underside of the upper convex and concave mold (2), and the upper backing plate (11) covers the upper convex and concave mold (2). ) on the upper side. 7. The stamping compound die according to claim 6, characterized in that, the flange die (7) and the lower mold base (5) are positioned and fixed by the positioning pins extending up and down, and are fixed by the screw rods extending up and down. Fixedly connected, between the described hole-turning punch (8) and the lower mold base (5) are positioned by the seam on the lower mold base (5) and fixedly connected by the screw rod extending up and down, the upper mold base ( 1) and the lower mold base (5) are all provided with a boom (14), the upper mold base (1) is provided with a guide hole, the guide hole is provided with a guide sleeve (15), the A guide column (16) slidingly fitted with the guide sleeve (15) is fixed on the lower mold base (5). 8. The stamping compound die according to any one of claims 1-7, characterized in that it also includes a lower backing plate (17) connected to the lower side of the lower convex and concave die (7) and an upper end connected to the lower backing plate The lower side of the plate (17) contacts the ejector rod (18), and the ejector rod (18) penetrates to the lower side of the lower mold base (5). 9. The stamping compound die according to any one of claims 1-7, characterized in that it also includes a pre-compressed elastic device arranged between the lower die base (5) and the lower concave-convex die (7) , the pre-compressed elastic device can push the lower convex die (7) to the same height as the flanging die (6) and can be compressed to make the lower convex die (7) move downward to expose the flange The edge die (6) exposes the inner wall of the ring to form the flanging. 10. A stamping machine, comprising a stamping drive end and a workbench, characterized in that, it also comprises a stamping composite mold as claimed in any one of claims 1-9, the upper mold base of the stamping composite mold is installed on the The upper and lower mold bases of the stamping driving end are installed on the workbench, and an air cushion is arranged between the workbench and the lower convex and concave dies of the stamping compound mold.