阅读说明：本技术 一种盒状翻边装置及其工艺 (Box-shaped flanging device and process thereof ) 是由 徐蓉 张罗 廖勇 韦旺华 黄亚辉 孙光辉 陈文刚 周平 覃存君 董麒 张�浩 于 2021-07-22 设计创作，主要内容包括：本发明涉及模具的技术领域,公开了一种盒状翻边装置及其工艺,包括凸模和凹模,所述凸模通过导柱与所述凹模相对设置,所述凹模设有与所述凸模外轮廓相匹配的凹模腔,所述凹模的顶面包括两个以上翻边顶面,至少其中两个所述翻边顶面之间形成有高度差。本发明的盒状翻边装置及其工艺,降低模具和设备成本,简化翻边步骤,提高生产效率。(The invention relates to the technical field of dies and discloses a box-shaped flanging device and a process thereof. The box-shaped flanging device and the process thereof reduce the cost of a die and equipment, simplify the flanging step and improve the production efficiency.)

1. The utility model provides a box-shaped flanging device which characterized in that: the die comprises a male die and a female die, wherein the male die is arranged opposite to the female die through a guide pillar, the female die is provided with a female die cavity matched with the outline of the male die, the top surface of the female die comprises more than two flanging top surfaces, and a height difference is formed between at least two flanging top surfaces.

2. The box-like burring device of claim 1, characterized in that: and a discharging plate is arranged at the bottom of the female die cavity and is provided with a positioning pin.

3. The box-like burring device of claim 2, characterized in that: the female die comprises a first flanging female die set and a second flanging female die set, the first flanging female die set comprises a first flanging female die and a second flanging female die, the first flanging female die and the second flanging female die are oppositely arranged, the second flanging female die combination comprises a third flanging female die and a fourth flanging female die, the third flanging female die and the fourth flanging female die are oppositely arranged, the third flanging female die and the fourth flanging female die are positioned between the first flanging female die and the second flanging female die, the first flanging female die is as high as the flanging top surface of the second flanging female die, the third flanging female die is as high as the flanging top surface of the fourth flanging female die, a height difference is formed between the first flanging female die and the top surface of the flanging female die, the first flanging female die, the second flanging female die, the third flanging female die and the flanging female die are surrounded to form the female die cavity.

4. The box-like burring device of claim 3, characterized in that: the punch die comprises an upper die holder and a lower die holder, wherein two ends of a guide pillar are respectively connected with the upper die holder and the lower die holder, the guide pillar is positioned at the edges of the upper die holder and the lower die holder, the male die is installed on the upper die holder, the female die is installed on the lower die holder, and the female die and the male die are arranged correspondingly.

5. The box-like burring device of claim 4, characterized in that: the die base is provided with a die base plate, the die base plate is provided with an unloading installation cavity, the lower side face of the unloading plate is in clearance fit with the inner wall of the unloading installation cavity, and the inner sides of the lower ends of the flanging die and the die combination II are in clearance fit with the upper side face of the unloading plate respectively.

6. The box-like burring device of claim 5, characterized in that: the die backing plate is provided with a die fixing plate, the die fixing plate is provided with an installation cavity, the unloading installation cavity is communicated with the installation cavity, the stripper plate integrates the flanging die and the die combination and is located in the installation cavity, and the inner wall of the installation cavity abuts against the outer side of the flanging die and the die combination.

7. The box-like burring device of claim 6, characterized in that: the die base plate is provided with a buffer spring, and the buffer spring extends to the die cavity through the die fixing plate.

8. The box-like burring device of claim 1, characterized in that: the female die comprises an upper flanging part and a lower guide part, the flanging top surface is positioned on the upper end surface of the upper flanging part, and the height difference between the flanging top surfaces with adjacent heights is 10% -60% of the height of the upper flanging part corresponding to the flanging top surface with the highest height.

9. The box-shaped flanging process is characterized in that: the process of flanging a workpiece by the box-shaped flanging device according to any one of claims 1 to 8, comprising the steps of:

s1, placing the flanging workpiece on the flanging top surface of the female die, wherein each flanging surface of the flanging workpiece is placed corresponding to each flanging top surface of the female die;

s2, pressing the middle part of the flanging workpiece by the male die along the guide post towards the direction of the female die cavity so as to enable all flanging surfaces of the flanging workpiece to be sequentially flanged from high to low according to the height of the flanging surfaces;

and S3, the male die extends into the female die cavity, the bottom surface of the flanging workpiece is attached to the bottom surface of the female die cavity, and the flanging workpiece is flanged.

10. The box-like burring process of claim 9, characterized in that: the flanging workpiece comprises a flanging bottom surface and more than two flanging surfaces, one end of each flanging surface is connected with the flanging bottom surface, in S1, the flanging bottom surface is respectively arranged corresponding to the positions of the male die and the discharging plate, and in S2, the flanging surfaces corresponding to the flanging top surfaces with the same height are simultaneously flanged.

Technical Field

The invention relates to the technical field of dies, in particular to a box-shaped flanging device and a process thereof.

Background

The automobile sheet metal part often has box-like class part, and box-like class part often needs the more than three prefaces to accomplish the turn-ups technology, and first preface shaping, one of them limit is turned over to the second preface, and the other limit is turned over to the third preface, accomplishes final turn-ups technology, because turn-ups process number of times is many, and the mould is with high costs, and the production of branch preface needs many presses, and the production step is complicated, and production efficiency is low.

Disclosure of Invention

The purpose of the invention is: the box-shaped flanging device and the process thereof are provided, the cost of a die and equipment is reduced, the flanging step is simplified, and the production efficiency is improved.

In order to achieve the purpose, the invention provides a box-shaped flanging device which comprises a male die and a female die, wherein the male die is arranged opposite to the female die through a guide post, the female die is provided with a female die cavity matched with the outer contour of the male die, the top surface of the female die comprises more than two flanging top surfaces, and a height difference is formed between at least two flanging top surfaces.

Preferably, the bottom of the cavity is provided with a stripper plate, and the stripper plate is provided with a positioning pin.

As a preferred scheme, the female die comprises a first flanging female die set and a second flanging female die set, the first flanging female die set comprises a first flanging female die and a second flanging female die, the first flanging female die and the second flanging female die are oppositely arranged, the second flanging female die combination comprises a third flanging female die and a fourth flanging female die, the third flanging female die and the fourth flanging female die are oppositely arranged, the third flanging female die and the fourth flanging female die are positioned between the first flanging female die and the second flanging female die, the first flanging female die is as high as the flanging top surface of the second flanging female die, the third flanging female die is as high as the flanging top surface of the fourth flanging female die, a height difference is formed between the first flanging female die and the top surface of the flanging female die, the first flanging female die, the second flanging female die, the third flanging female die and the flanging female die are surrounded to form the female die cavity.

Preferably, the die comprises an upper die holder and a lower die holder, two ends of the guide post are respectively connected with the upper die holder and the lower die holder, the guide post is located at the edges of the upper die holder and the lower die holder, the male die is mounted on the upper die holder, the female die is mounted on the lower die holder, and the female die and the male die are arranged correspondingly.

According to the preferable scheme, the lower die base is provided with a female die base plate, the female die base plate is provided with a discharging installation cavity, the lower side face of the discharging plate is in clearance fit with the inner wall of the discharging installation cavity, and the inner sides of the lower ends of the flanging female die set combination and the flanging female die combination are in clearance fit with the upper side face of the discharging plate respectively.

As the preferred scheme, the die backing plate is provided with a die fixing plate, the die fixing plate is provided with an installation cavity, the unloading installation cavity is communicated with the installation cavity, the unloading plate and the flanging die assembly are integrated and the flanging die assembly is combined into a whole, the installation cavity is internally provided with the installation cavity, and the inner wall of the installation cavity is abutted to the outer sides of the flanging die assembly and the flanging die assembly.

Preferably, the die base plate is provided with a buffer spring, and the buffer spring extends to the die cavity through the die fixing plate.

Preferably, the female die comprises an upper flanging part and a lower guide part, the flanging top surface is positioned on the upper end surface of the upper flanging part, and the height difference between the flanging top surfaces with adjacent heights is 10% -60% of the height of the upper flanging part corresponding to the flanging top surface with the highest height.

The box-shaped flanging process for flanging a flanging workpiece by the box-shaped flanging device comprises the following steps of:

s1, placing the flanging workpiece on the flanging top surface of the female die, wherein each flanging surface of the flanging workpiece is placed corresponding to each flanging top surface of the female die;

s2, pressing the middle part of the flanging workpiece by the male die along the guide post towards the direction of the female die cavity so as to enable all flanging surfaces of the flanging workpiece to be sequentially flanged from high to low according to the height of the flanging surfaces;

and S3, the male die extends into the female die cavity, the bottom surface of the flanging workpiece is attached to the bottom surface of the female die cavity, and the flanging workpiece is flanged.

Preferably, the flanging workpiece includes a flanging bottom surface and more than two flanging surfaces, one end of each flanging surface is connected with the flanging bottom surface, in S1, the flanging bottom surface is respectively arranged corresponding to the positions of the male die and the discharge plate, and in S2, the flanging surfaces corresponding to the flanging top surfaces with the same height are simultaneously flanged.

Compared with the prior art, the box-shaped flanging device provided by the embodiment of the invention has the beneficial effects that: the flanging workpiece is placed on the top surface of the female die, and under the driving of the press machine, the male die is close to or far away from the female die through the stretching of the guide post or the sliding of the male die relative to the guide post. When the male die presses the flanging workpiece downwards, the periphery of the flanging workpiece is gradually turned upwards under the pushing force of the top surface of the female die, and the flanging sequence of each side of the flanging workpiece is controlled by setting the height difference between the flanging top surfaces. The flanging device comprises a first flanging surface, a second flanging surface, a third flanging surface, a fourth flanging surface, a fifth flanging surface, a sixth flanging surface, a fifth surface, a sixth surface, a fifth surface, a sixth surface, a fourth surface, a fifth surface, a sixth surface, a fourth surface, a sixth surface, a fourth surface, a fourth.

Compared with the prior art, the box-shaped flanging process has the beneficial effects that: the flanging workpiece is placed between the male die and the female die, the middle part of the flanging workpiece is pressed into the cavity of the female die downwards through the male die, in the pressing-down process, each side edge of the flanging workpiece is sequentially flanged along with the flanging top surface from high to low of the female die, and then one-time flanging of the flanging workpiece is realized, the flanging efficiency of the flanging workpiece is improved, the flanging process of the flanging workpiece is simplified, and as the flanging top surfaces of each side surface of the flanging workpiece are enabled to have height difference, and further the interference of the adjacent side surfaces of the workpiece in the flanging process is avoided, and the smooth flanging of the flanging workpiece is ensured.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is a schematic structural view of a die holder plate according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a die shim plate according to an embodiment of the present invention.

FIG. 4 is a schematic view of the mounting structure of the male die, the female die and the flanging workpiece according to the embodiment of the invention.

FIG. 5 is a schematic view of the mounting structure of the female die, the female die fixing plate and the female die backing plate according to the embodiment of the present invention.

FIG. 6 is a schematic view of the mounting structure of the female die, the female die fixing plate and the female die backing plate according to the embodiment of the present invention.

FIG. 7 is a schematic structural view of a flanging workpiece before flanging according to an embodiment of the invention.

FIG. 8 is a schematic structural diagram of flanging workpiece according to the embodiment of the invention.

In the figure:

10. a male die; 11. a guide post; 12. an upper die holder; 13. a lower die holder;

20. a female die; 21. the top surface of the flanging; 22. the flanging die set and the concave die set are integrated; 23. a flanging female die combination II; 24. a flanging female die I; 25. a flanging female die II; 26. a flanging female die III; 27. a flanging female die IV;

30. a cavity; 31. a stripper plate; 32. positioning pins;

40. a die base plate; 41. a discharging installation cavity; 42. a buffer spring;

50. fixing a female die plate; 51. a mounting cavity;

60. flanging the workpiece; 61. the bottom surface of the flanging; 62. and (5) flanging surfaces.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. used herein are used to indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "connected," "fixed," and the like are used in a broad sense, and for example, the terms "connected," "connected," and "fixed" may be fixed, detachable, or integrated; the connection can be mechanical connection or welding connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 8, a box-shaped flanging device according to a preferred embodiment of the present invention includes a male die 10 and a female die 20, the male die 10 is disposed opposite to the female die 20 through a guide post 11, the female die 20 is provided with a female die cavity 30 matching with an outer contour of the male die 10, a top surface of the female die 20 includes more than two flanging top surfaces 21, and a height difference is formed between at least two flanging top surfaces 21. Specifically, the actual value of the height difference is obtained by comprehensively calculating the material springback condition of the flanging workpiece 60 and the height of the flanging top surface.

In the box-shaped flanging device of the invention, a flanging workpiece 60 is placed on the flanging top surface 21 of the female die 20, and the male die 10 is close to or far from the female die 20 through the extension and contraction of the guide post 11 or the sliding of the male die 10 relative to the guide post 11. When the male die 10 presses the flanging workpiece 60 downwards, the middle part of the flanging workpiece 60 is sunken into the female die cavity 30, the periphery of the flanging workpiece 60 is gradually turned upwards under the pushing force of the top surface of the female die 20, and the flanging sequence of each flanging surface 62 of the flanging workpiece 60 is controlled by setting the height difference between the flanging top surfaces 21. The first flanging surface 62 of the flanging workpiece 60 corresponding to the highest flanging top surface 21 and the last flanging surface 62 of the flanging workpiece 60 corresponding to the lowest flanging top surface 21 are sequentially flanged from the highest flanging top surface 21 to the lowest flanging top surface 21, the flanging surfaces 62 of the flanging workpieces 60 corresponding to the flanging top surfaces 21 with the same height are simultaneously flanged, each flanging surface 62 of the flanging workpiece 60 is sequentially flanged according to the height of the flanging top surface 21 in the process of pressing down the male die 10, when the male die 10 is pressed down in place, the flanging of the flanging workpiece 60 is completed, and further the one-step flanging of the flanging workpiece 60 is realized, one set of die and one press can finish a plurality of flanging processes of the flanging workpiece 60 at one time, the die and equipment cost is effectively reduced, the flanging steps are simplified, and the production efficiency of the flanging workpiece 60 is improved.

Further, as shown in fig. 5 to 6, a discharging plate 31 is provided at the bottom of the cavity 30, and the discharging plate 31 is provided with a positioning pin 32. The hemming work 60 is positioned by the positioning pin 32. Specifically, the flanging workpiece 60 is provided with a flanging positioning hole, and the positioning pin 32 passes through the flanging positioning hole and is mounted on the discharging plate 31, so that the flanging workpiece 60 is positioned, the flanging workpiece 60 is prevented from moving in a flanging process, and the flanging yield of the flanging workpiece 60 is ensured.

Further, as shown in fig. 3 to 6, for the flanging workpiece 60 having four flanging surfaces 62 to be turned up, specifically, the female die 20 includes a flanging female die assembly 22 and a flanging female die assembly two 23, the flanging female die assembly 22 includes a flanging female die 24 and a flanging female die 25, the flanging female die 24 and the flanging female die 25 are arranged oppositely, the flanging female die assembly two 23 includes a flanging female die three 26 and a flanging female die four 27, the flanging female die three 26 and the flanging female die four 27 are arranged oppositely, the flanging female die three 26 and the flanging female die 20 are located between the flanging female die one 24 and the flanging female die two 25, the flanging female die one 24 and the flanging top surface 21 of the flanging female die two 25 are equal in height, the flanging female die three 26 and the flanging female die four 26 are equal in height, a height difference is formed between the flanging female die one 24 and the flanging female die three 26, and a height difference is formed between the flanging female die top surface 21 of the flanging female die four 26, and a height difference is formed between the flanging female die 24 and a height difference is formed between the flanging female die two 25, And the third flanging female die 26 and the fourth flanging female die 27 are enclosed to form a female die cavity 30. The first flanging female die 24 is as high as the flanging top face 21 of the second flanging female die 25, and the third flanging female die 26 is as high as the flanging top face 21 of the fourth flanging female die 27, so that the first flanging female die 24, the second flanging female die 25, the third flanging female die 26 and the fourth flanging female die 27 can simultaneously flanging corresponding to the flanging faces 62 on the flanging workpiece 60, and simultaneously can support the corresponding flanging faces 62, thereby preventing the flanging workpiece 60 from being inclined and dislocated in the flanging process. A height difference is formed between the first flanging female die 24 and the flanging top surface 21 of the third flanging female die 26, namely, the height difference is formed between the first flanging female die assembly 22 and the second flanging female die assembly 23, so that two groups of opposite surfaces of the flanging workpiece 60 are sequentially flanged, and the technical effects that the same group of opposite flanging surfaces 62 are simultaneously flanged, and different groups of opposite flanging surfaces 62 are sequentially flanged are achieved. Specifically, the stripper plate 31 is in sliding fit with the facing surfaces of the first flanging female die, the second flanging female die, the third flanging female die and the fourth flanging female die in the working process respectively.

Further, as shown in fig. 1, the die comprises an upper die holder 12 and a lower die holder 13, two ends of a guide post 11 are respectively connected with the upper die holder 12 and the lower die holder 13, the guide post 11 is located at the edges of the upper die holder 12 and the lower die holder 13, a male die 10 is mounted on the upper die holder 12, a female die 20 is mounted on the lower die holder 13, and the female die 20 and the male die 10 are correspondingly arranged. The male die 10 and the female die 20 are respectively fixed through the upper die base 12 and the lower die base 13, relative movement of the upper die base 12 and the lower die base 13 is achieved through the guide pillar 11, meanwhile, the guide pillar 11 plays a guiding role in the female die 20 and the male die 10, and the female die 20 and the male die 10 are correspondingly arranged in position, so that accurate die pressing of the female die 20 and the male die 10 is achieved. Specifically, the guide post 11 is a guide post guide sleeve.

Further, as shown in fig. 3, the lower die holder 13 is provided with a female die backing plate 40, the female die backing plate 40 is provided with a discharging installation cavity 41, the lower side of the discharging plate 31 is in clearance fit with the inner wall of the discharging installation cavity 41, and the inner sides of the lower ends of the flanging female die assembly 22 and the flanging female die assembly 23 are in clearance fit with the upper side of the discharging plate 31 respectively. When the device works, the discharging plate 31, the discharging installation cavity, the female die set and the female die combination slide relatively, and when the device does not work, the discharging plate 31 is reset under the action of the nitrogen spring.

More specifically, the lower straight wall of the first flanging female die assembly 22 and the second flanging female die assembly 23 has a guiding function, and the discharging plate 41 can slide along the lower straight wall of the first flanging female die assembly 22 and the second flanging female die assembly 23.

Further, as shown in fig. 2, the die backing plate 40 is equipped with the die fixing plate 50, the installation cavity 51 has been seted up to the die fixing plate 50, the installation cavity 41 and the installation cavity 51 intercommunication of unloading, the stripper 31, two 23 of turn-ups female mould group unification 22 and turn-ups female mould combination all are located the installation cavity 51, the inner wall of installation cavity 51 supports and pastes in the outside of two 23 of turn-ups female mould group unification 22 and turn-ups female mould combination, and then realize that die fixing plate 50 is to the stripper 31, spacing and fixed of two 23 of turn-ups female mould group unification 22 and turn-ups female mould combination, prevent that two 23 of turn-ups female mould group unification 22 and turn-ups female mould combination from taking place the dislocation movement at the moulding-die in-process. Specifically, the flanging female die set unification 22 and the flanging female die combination two 23 are fixed on the female die fixing plate 50 through bolts, so that the flanging female die set unification 22 and the flanging female die combination two 23 are connected with the lower die holder 13 into a whole. Specifically, the stripper plate 31 is mounted on the die backing plate 40 through a limiting bolt, a limiting bolt via hole is formed in the lower die holder 13, and a limiting bolt stroke stop groove is formed in the die backing plate 40.

Further, the female die fixing plate 50 and the female die backing plate 40 are locked on the lower die base 13, and the flanging female die assembly are both installed on the female die fixing plate 50 in a side locking mode. The limiting bolt penetrates through the die backing plate 40 to install the stripper plate 31 on the lower die base 13.

Further, as shown in fig. 6, the die shim plate 40 is provided with a buffer spring 42, and the buffer spring 42 extends to the cavity 30 through the die fixing plate 50. In the process of die pressing, the male die 10 presses the flanging workpiece 60 into the female die cavity 30, the flanging workpiece 60 is flanged and formed, and the buffer spring 42 is pressed under the male die 10 to play a buffer role and provide the discharging force for the discharging plate 31. Specifically, the die backing plate 40 is provided with a spring through hole, and the lower die holder 13 is provided with a blind hole corresponding to the aperture and position of the spring through hole. The buffer spring 42 is mounted in the spring through hole and the blind hole. Preferably, the buffer spring 42 is a nitrogen spring.

Further, the female die 20 includes an upper flange portion and a lower guide portion, the flange top surface 21 is located on the upper end surface of the upper flange portion, and the height difference between the flange top surfaces 21 of adjacent heights is 10% -60% of the height of the upper flange portion corresponding to the flange top surface 21 with the highest height. The upper flanging part is mainly used for flanging a flanging workpiece, and the lower guide part plays a role in guiding in the flanging process. As shown in fig. 7, when the side edge of the first flanging surface 62 is provided with a convex surface facing the same direction as the adjacent second flanging surface 62, the adjacent flanging surfaces 62 are easy to interfere during flanging, and the larger the height difference between the flanging top surfaces 21 at adjacent heights is, the larger the time difference of sequential flanging is, which is beneficial to avoiding interference during flanging of the adjacent flanging surfaces 62, so that the flanging work piece 60 can smoothly complete the flanging process at one time.

As shown in fig. 1 to 8, a box-shaped flanging process for flanging a flanging workpiece 60 by a box-shaped flanging device includes the following steps:

s1, placing the flanging workpiece 60 on the flanging top surface 21 of the female die 20, wherein each flanging surface 62 of the flanging workpiece 60 is placed corresponding to each flanging top surface 21 of the female die 20;

s2, pressing the middle part of the flanging workpiece 60 by the male die 10 along the guide post 11 towards the direction of the female die cavity 30 so as to enable all flanging surfaces 62 of the flanging workpiece 60 to be sequentially flanged according to the flanging top surfaces 21 from high to low; specifically, in the flanging process of the flanging surface 62 corresponding to the flanging top surface 21 with the previous height, the flanging surface 62 corresponding to the flanging top surface 21 with the next adjacent height starts to be flanged. More specifically, under the guiding action of the guide post 11, the male die 10 firstly compresses the middle part of the flanging workpiece 60, and then continuously presses down towards the die cavity 30.

S3, the male die 10 extends into the female die cavity 30, the bottom surface of the flanging workpiece 60 is attached to the bottom surface of the female die cavity 30, and the flanging workpiece 60 completes flanging. More specifically, when the stripper plate 31 is pressed down to be attached to the die backing plate 40, the flanging workpiece 60 is flanged.

According to the box-shaped flanging process, the flanging workpiece 60 is placed between the male die 10 and the female die 20, the middle of the flanging workpiece 60 is pressed downwards into the female die cavity 30 through the male die 10, in the pressing-down process, each side edge of the flanging workpiece 60 is flanged along with the flanging top surface 21 of the female die 20 from high to low in sequence, and therefore one-time flanging of the flanging workpiece 60 is achieved, the flanging efficiency of the flanging workpiece 60 is improved, the flanging process of the flanging workpiece 60 is simplified, due to the fact that the flanging top surfaces 21 of the flanging of each side surface of the flanging workpiece 60 are made to have height differences, interference of adjacent side surfaces of the workpiece in the flanging process is avoided, and smooth flanging of the flanging workpiece 60 is guaranteed.

Further, as shown in fig. 7 to 8, the flanging workpiece 60 includes a flanging bottom surface 61 and two or more flanging surfaces 62, one end of each flanging surface 62 is connected to the flanging bottom surface 61, specifically, in S1, the flanging bottom surface 61 is respectively disposed corresponding to the positions of the punch 10 and the stripper plate 31, when the flanging bottom surface 61 is pressed into the cavity 30 by the punch 10, because the flanging surfaces 62 are connected to the flanging bottom surface 61, the flanging bottom surface 61 drives one end of the flanging surfaces 62 to move downward, the flanging surfaces 62 move downward, and simultaneously, the flanging top surface 21 pushes up the other end of the flanging surfaces 62 upward under the downward pressure effect of the punch 10, thereby implementing the flanging process of the flanging surfaces 62.

In S2, the cuff faces 62 corresponding to the cuff top faces 21 having the same height are simultaneously cuff. The flanging top surface 21 with the same height is arranged to realize simultaneous flanging of the flanging surface 62, different process requirements of simultaneous flanging and sequential flanging in a flanging process are met, the processing mode is rich, and various flanging process requirements are met.

To sum up, the embodiment of the present invention provides a box-shaped flanging device, wherein a flanging workpiece 60 is placed on the top surface of the female die 20, and the male die 10 is moved close to or away from the female die 20 by the extension and contraction of the guide post 11 or the sliding of the male die 10 relative to the guide post 11. When the male die 10 presses the flanging workpiece 60 downwards, the middle part of the flanging workpiece 60 is sunken into the female die cavity 30, the periphery of the flanging workpiece 60 is gradually turned upwards under the pushing force of the top surface of the female die 20, and the flanging sequence of each side of the flanging workpiece 60 is controlled by setting the height difference between the flanging top surfaces 21. The highest flanging top face 21 is the first flanging face 62 of the flanging workpiece 60, the lowest flanging top face 21 is the last flanging face 62 of the flanging workpiece 60, the flanging faces 62 of the flanging workpiece 60 are sequentially flanged by the flanging top faces 21 from high to low, the flanging faces 62 of the flanging workpiece 60 corresponding to the flanging top faces 21 with the same height are simultaneously flanged, each edge of the flanging workpiece 60 is sequentially flanged according to the high and low positions of the flanging top face 21 in the pressing process of the male die 10, when the male die 10 is pressed in place, the flanging of the flanging workpiece 60 is completed, and further the one-step flanging of the flanging workpiece 60 is realized, one set of die and one set of press can complete a plurality of flanging processes of the flanging workpiece 60 at one time, the die and equipment costs are effectively reduced, the flanging steps are simplified, and the production efficiency of the flanging workpiece 60 is improved.

The embodiment of the invention provides a box-shaped flanging process, wherein a flanging workpiece 60 is placed between a male die 10 and a female die 20, the middle part of the flanging workpiece 60 is pressed downwards into a female die cavity 30 through the male die 10, in the pressing-down process, each side edge of the flanging workpiece 60 is flanged along with the flanging top surface 21 of the female die 20 from high to low in sequence, so that one-time flanging of the flanging workpiece 60 is realized, the flanging efficiency of the flanging workpiece 60 is improved, the flanging process of the flanging workpiece 60 is simplified, and because each flanging top surface 21 for flanging each side surface of the flanging workpiece 60 is made to have a height difference, the interference of adjacent side surfaces of the workpiece in the flanging process is avoided, and the smooth flanging of the flanging workpiece 60 is ensured.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.