CN217451773U - Bending die - Google Patents

Abstract

The utility model belongs to the technical field of mould equipment, a mould of bending is specifically provided. The utility model provides a panel when using current mould to push away the negative angle, the lower problem of efficiency of bending. Therefore, the bending die of the utility model comprises a first die, a second die, a bending component and a negative angle pushing component; the first die and the second die can be relatively close to or far away from each other, and the first die and the second die are used for clamping a target component; the bending member is used for bending the target member clamped by the first die and the second die; the negative angle pushing component is used for pushing the part of the target component bent by the bending component so as to enable the target component to form a negative angle bend. The utility model discloses according to only bending the negative angle that the mould just can realize panel through one and bending and bend, for prior art, not only reduced the process of bending of panel, but also promoted the efficiency of bending of panel.

Description

Bending die

Technical Field

The utility model belongs to the technical field of mould equipment, a mould of bending is specifically provided.

Background

Plates are often used in refrigerators, freezers, and the like. In the use process of a plate material (especially a thin plate), in order to improve the strength of the plate material, facilitate the installation, fixation and the like of the plate material, the edge part of the plate material is usually required to be bent. After some plates are bent, a negative angle needs to be pushed so that an included angle between the bent part of the plate and the plate body is an acute angle.

In order to bend the plate with the negative angle, in the prior art, the bending effect of the plate can be achieved only by using a bending die and a negative angle pushing die. The bending die is used for bending the edge part of the plate by 90 degrees, and the negative angle pushing die is used for pushing the bent part of the plate by a negative angle so as to enable the plate to form negative angle bending.

This kind of mode of bending not only needs two moulds just can realize pushing away the negative angle of panel and bend, and the process of bending is complicated moreover, and the efficiency of bending is lower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve panel when using current mould to push away the negative angle, the lower problem of efficiency of bending.

In order to achieve the purpose, the utility model provides a bending die, which comprises a first die, a second die, a bending component and a negative angle pushing component; the first die and the second die can be relatively close to or far away from each other, and the first die and the second die are used for clamping a target component; the bending member is used for bending the target member clamped by the first die and the second die; the negative angle pushing component is used for pushing the part of the target component bent by the bending component so as to enable the target component to form a negative angle bend.

Optionally, the first die is a movable die, and the second die is a fixed die; the first die is positioned above the second die, and the first die moves in a vertical direction.

Optionally, the first die and the second die each have an extrusion surface adapted to the target member.

Optionally, the first die and the second die are each provided as a plate-like structure.

Optionally, the bending member is arranged to be movable relative to the second die; and/or the bending member is positioned outside the first die and/or the second die in a direction perpendicular to the moving direction of the first die, so that the bending member bends the part of the target member exposed outside the first die.

Optionally, the bending member is movable up and down relative to the first die; and a bending guide part is arranged on the side part of the second die corresponding to the bending member and is used for assisting the bending member to bend the target member downwards.

Optionally, the negative angle pushing member is movable in a horizontal direction toward or away from the bend guide; the negative angle pushing member is used for pushing the part of the target member bent by the bending member to the bottom surface of the bending guide part, so that the target member forms a negative angle bending.

Optionally, the bottom surface of the bending guide part is an inclined surface and is recorded as a bending inclined surface; the negative angle pushing component is provided with a negative angle pushing inclined plane matched with the bending inclined plane.

Optionally, the bending member is provided with a reset inclined plane corresponding to the negative pushing angle inclined plane, and the bending member presses the negative pushing angle inclined plane in the horizontal direction through the reset inclined plane to force the negative pushing angle member to be away from the bending guide portion, so that the negative pushing angle member is prevented from interfering with the bending member to descend; the negative angle pushing component upwards presses the reset inclined plane through the negative angle pushing inclined plane to force the bending component to ascend, so that the bending component is prevented from interfering the negative angle pushing component to be close to the bending guide part.

Optionally, the target member is a plate.

Optionally, the bending die further includes an upper die base and a lower die base fixed together, the first die and the bending member are mounted on the upper die base, and the second die and the negative angle pushing member are mounted on the lower die base.

Optionally, a secondary driving bevel is arranged on the negative angle pushing component; the mould of bending still includes:

a base plate mounted to the upper die base so as to be movable relative thereto in a vertical direction, the first die and the bending member being respectively mounted below the base plate so as to be movable in the vertical direction;

the driving device is used for driving the substrate to move;

a first spring for providing a force to the first die away from the substrate;

a second spring for providing a force to the bending member away from the substrate;

the driving component is fixedly connected with the substrate, the bottom of the driving component extends to the lower part of the substrate and is provided with a main driving inclined plane, and the main driving inclined plane is matched with the auxiliary driving inclined plane, so that the driving component drives the negative angle pushing component to be close to the second die.

Optionally, the bending die further includes a connecting plate and a third spring, the connecting plate is disposed between the base plate and the first die, the first spring is disposed between the connecting plate and the first die, the second spring is disposed between the connecting plate and the bending member, and the third spring is disposed between the connecting plate and the base plate; and/or the bending die further comprises a fourth spring, and the fourth spring is used for providing force for the negative angle pushing component to be close to the second die.

Based on the foregoing description, it can be understood by those skilled in the art that, in the foregoing technical solution of the present invention, by configuring the first die, the second die, the bending member, and the negative angle pushing member for the bending die, and causing the first die and the second die to clamp the target member, the bending member bends the target member clamped by the first die and the second die, and the negative angle pushing member pushes the portion of the target member bent by the bending member, thereby causing the target member to form the negative angle bend. Therefore, the utility model discloses a mould of bending only can realize through a mould of bending that the negative angle of panel is bent, for prior art, not only reduced the process of bending of panel, but also promoted the efficiency of bending of panel.

Further, the bending die of the utility model can enable the bending component to extrude the negative angle inclined plane through the reset inclined plane in the horizontal direction in the process of bending a target component (such as a plate) so as to force the negative angle component to be far away from the bending guide part, thereby avoiding the negative angle component from interfering the falling of the bending component; the negative angle pushing component upwards presses the reset inclined plane through the negative angle pushing inclined plane to force the bending component to ascend, so that the bending component is prevented from interfering with the negative angle pushing component to be close to the bending guide part. In short, the bending member and the negative angle pushing member of the present invention can be driven to each other, and in particular, one of the bending member and the negative angle pushing member currently used for bending the target member (plate) can be driven to reset the other. Therefore, the utility model provides a bending component can not take place mutual interference with pushing away negative angle component.

Further, the utility model discloses a drive arrangement drive base plate removes, provides the power of keeping away from the base plate for first mould through first spring, provides the power of keeping away from the base plate for the component of bending through the second spring, pushes away the negative angle component through the drive component drive and is close to the second mould, makes the utility model discloses a mould of bending only need just can make first mould, the component of bending and push away the negative angle component through one or a set of drive arrangement and remove in proper order, and then accomplish bending of target component and push away the negative angle, simplified the process of bending of target component.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art will appreciate that elements or portions of the same reference number identified in different figures are the same or similar; the drawings of the present invention are not necessarily drawn to scale relative to each other. In the drawings:

fig. 1 is an isometric view of a bending die in some embodiments of the present invention;

FIG. 2 is a cross-sectional view of the bending die in FIG. 1 along the direction A-A;

FIG. 3 is a cross-sectional view of the bending die of FIG. 2 taken along the direction B-B;

FIG. 4 is a cross-sectional view of the bending die in FIG. 1 along the direction A-A (the first die and the second die are in an open state);

FIG. 5 is a cross-sectional view of the bender in FIG. 1 taken along the line A-A (the first and second dies clamp the target member);

FIG. 6 is a cross-sectional view of the bending die of FIG. 1 taken along the direction A-A (bending member bends the target member);

FIG. 7 is a cross-sectional view of the bending die of FIG. 1 taken along the direction A-A (pushing the negative corner member to jack up the bending member);

FIG. 8 is a cross-sectional view of the bending die of FIG. 1 taken along the direction A-A (pushing the negative corner member against the target member).

Detailed Description

It is to be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments of the present invention, and the part of the embodiments are intended to explain the technical principle of the present invention and not to limit the scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by a person skilled in the art without any inventive work should still fall within the scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning 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 and 2, in some embodiments of the present invention, the bending mold includes a fixing frame 1, a first mold 2, a second mold 3, a bending member 4, a negative angle pushing member 5, a base plate 6, a connecting plate 7, a driving device 8, a driving member 9, a first spring 11, a second spring 12, a third spring 13, and a fourth spring 14.

With continued reference to fig. 1 and 2, the fixed frame 1 includes an upper die base 101 and a lower die base 102, and the upper die base 101 and the lower die base 102 are fixedly connected together by a column, and thus a space is formed between the upper die base 101 and the lower die base 102. This space is used for mounting the first die 2, the second die 3, the bending member 4, the negative angle pushing member 5, the base plate 6, the connecting plate 7, the driving device 8, the driving member 9, the first spring 11, the second spring 12, the third spring 13, and the fourth spring 14.

In addition, in other embodiments of the present invention, on the premise that the first die 2, the second die 3, the bending member 4, the negative angle pushing member 5, the base plate 6, the connecting plate 7, the driving device 8, the driving member 9, the first spring 11, the second spring 12, the third spring 13, and the fourth spring 14 can be mounted, a person skilled in the art can set the fixing frame 1 to any other feasible form as needed. For example, the structure is formed by welding a plurality of metal plates, T-shaped steel, pipes and any feasible profiles.

As shown in fig. 2 and 3, the first die 2, the bending member 4, the base plate 6, the connecting plate 7, the driving device 8, and the driving member 9 are mounted on the upper die base 101. The second die 3 and the negative thrust angle member 5 are both mounted to the lower die holder 102. In the vertical direction, first die 2 corresponds to second die 3, and bending member 4 corresponds to negative angle pushing member 5. As shown in fig. 3, the bending member 4 is located outside the first die 2 in the vertical direction, and the upper, left and right sides of the first die 2 and the second die 3 (the second die 3 is on the upper, left and right sides of the structure shown in fig. 3) are provided with the bending member 4 and the negative angle urging member 5, respectively, so that the target member 15 can be extracted from the lower side of the second die 3 (the second die 3 is on the lower side of the structure shown in fig. 3) after being bent (which will be described in detail later).

It is noted that in some embodiments of the present invention, the target member 15 is a plate material. In other words, the utility model discloses a mould of bending is applicable to bending of panel. However, it should be understood by those skilled in the art that the target member 15 may also be any other feasible member, such as a steel bar, a metal strip, a metal mesh, etc.

As shown in fig. 2, the upper die base 101, the base plate 6, the connecting plate 7, and the first die 2 are sequentially distributed from top to bottom. The driving device 8 is disposed between the substrate 6 and the upper die base 101.

With continued reference to fig. 2, the substrate 6 is movable up and down relative to the upper die base 101. Specifically, the driving device 8 is provided between the substrate 6 and the upper die base 101, and the driving device 8 is used to drive the substrate 6 to move up and down with respect to the upper die base 101. The drive device 8 can be any feasible drive device, such as a hydraulic cylinder, an air cylinder, an electric cylinder, a screw-nut pair, etc. Illustratively, the driving device 8 is an electric cylinder, one of the base plate 6 and the upper die base 101 is fixedly connected with a cylinder body of the electric cylinder, and the other of the base plate 6 and the upper die base 101 is fixedly connected with a cylinder rod of the electric cylinder.

With continued reference to fig. 2, the connecting plate 7 is disposed on a side of the base plate 6 away from the upper die base 101, and the connecting plate 7 is capable of moving up and down with respect to the base plate 6. Further, a third spring 13 is arranged between the connection plate 7 and the base plate 6, which third spring 13 is used to provide a force to the connection plate 7 away from the base plate 6.

With continued reference to fig. 2, first die 2 and bending member 4 are both disposed on a side of web 7 remote from base 6. And, a first spring 11 is provided between the first die 2 and the connecting plate 7, the first spring 11 being for providing the first die 2 with a force away from the connecting plate 7. A second spring 12 is arranged between bending member 4 and web 7, which second spring 12 is arranged to provide bending member 4 with a force away from web 7.

Further, although not shown in the drawings, in some embodiments of the present invention, first die 2, bending member 4, base plate 6, and connecting plate 7 are also each configured with a guide structure to guide first die 2, bending member 4, base plate 6, and connecting plate 7 to move in the vertical direction by the respective corresponding guide structures. Illustratively, the guide structures corresponding to the first die 2, the bending member 4, the base plate 6, and the connecting plate 7 respectively include a hole structure provided on the upper die base 101 and a post structure fixed to the first die 2, the bending member 4, the base plate 6, and the connecting plate 7 respectively. The post structure is inserted into a hole structure on the upper die base 101 in a sliding manner.

For example, the first die 2 is provided with or mounted with guide posts, the base plate 6 and the connecting plate 7 are provided with through holes for allowing the guide posts to pass through, and the upper die base 101 is provided with guide holes corresponding to the guide posts. The guide post is inserted into the guide hole in a sliding manner.

Further, a guide post is attached or provided to the bending member 4, a through hole for allowing the guide post to pass is provided to the base plate 6 and the connecting plate 7, and a guide hole corresponding to the guide post is provided to the upper die base 101. The guide post is inserted into the guide hole in a sliding manner.

Further, guide posts are mounted or disposed on the connecting plate 7, through holes for allowing the guide posts to pass through are disposed on the base plate 6, and guide holes corresponding to the guide posts are disposed on the upper die base 101. The guide post is inserted into the guide hole in a sliding manner.

Further, a guide post is mounted or provided on the substrate 6, and a guide hole corresponding to the guide post is provided on the upper die base 101. The guide post is inserted into the guide hole in a sliding manner.

In other embodiments of the present invention, a person skilled in the art may omit the connecting plate 7 and the third spring 13, and make both ends of the first spring 11 abut against the base plate 6 and the first die 2, and make both ends of the second spring 12 abut against the base plate 6 and the bending member 4, respectively, as necessary.

Continuing to refer to fig. 2, the driving member 9 is fixedly connected to the substrate 6, and the bottom of the driving member 9 extends to the lower side of the substrate 6 and is provided with a main driving inclined plane 91.

With continued reference to fig. 2, the side of second die 3 corresponding to bending member 4 is provided with a bending guide 31, and bending guide 31 is used to assist bending member 4 in bending target member 15 downward. Further, the bottom surface of the bent guide portion 31 is a slope and is referred to as a bent slope 311. The bent slope 311 is fitted to the negative angle urging member 5. The edge of the bending guide 31 is provided with an arc-shaped chamfer to prevent the target member 15 from being cut when the bending member 4 bends the target member 15.

With continued reference to fig. 2, the top of bending member 4 is provided with a reset bevel 41, and the reset bevel 41 is adapted to push negative angle member 5. The negative angle pushing component 5 is provided with a negative angle pushing inclined surface 51 and a secondary driving inclined surface 52, the negative angle pushing inclined surface 51 is respectively matched with the bending inclined surface 311 and the reset inclined surface 41, and the secondary driving inclined surface 52 is matched with the main driving inclined surface 91. The push negative angle bevel 51 and the bend bevel 311 are used together to negatively bend the target member 15. The push negative angle inclined surface 51 and the reset inclined surface 41 are used for enabling the push negative angle member 5 to drive the bending member 4, and specifically, the bending member 4 drives the push negative angle member 5 to be away from the bending guide part 31 through the push negative angle inclined surface 51 and the reset inclined surface 41 which are abutted together; negative thrust angle member 5 drives bending member 4 up by abutting negative thrust angle ramp 51 and return ramp 41 together. The secondary drive ramps 52 and the primary drive ramps 91 are used to cause the drive member 9 to drive the negative corner member 5 towards the second die 3.

Further, a fourth spring 14 is arranged between the negative angle pushing member 5 and the lower die base 102, and the fourth spring 14 is used for providing a force for the negative angle pushing member 5 to be close to the second die 3.

The working principle of the bending die of the present invention will be described in detail with reference to fig. 4 to 8.

First, the target member 15 is placed on the second die 3 (as shown in fig. 4), and then the driving device 8 is caused to drive the substrate 6 to move downward. During the downward movement of the base plate 6, the connecting plate 7, the driving device 8 and the driving member 9 are driven to move downward synchronously until the first die 2 and the second die 3 clamp the target member 15 (as shown in fig. 5).

Then, the driving device 8 is caused to drive the substrate 6 to continue the downward movement. At this time, since the first die 2 presses the target member 15 against the second die 3 without being further moved downward, the first spring 11 is compressed. The bending member 4 moves downward along with the substrate 6 and bends the portion of the target member 15 exposed outside the first die 2 until the portion of the target member 15 exposed outside the first die 2 is bent by 90 ° (as shown in fig. 6).

Then, the driving device 8 is caused to drive the substrate 6 to continue the downward movement. In the process, as shown in fig. 7, the primary driving ramp 91 of the driving member 9 gradually approaches and abuts the secondary driving ramp 52 of the thrust horn member 5. Under the action of the primary driving ramp 91 and the secondary driving ramp 52, the driving member 9 provides the negative thrust corner member 5 with a force against the fourth spring 14 and moves the negative thrust corner member 5 toward the second die 3. As the negative angle pushing member 5 moves, the negative angle pushing slope 51 gradually approaches and abuts on the return slope 41 of the bending member 4. Under the action of push negative angle ramp 51 and return ramp 41, push negative angle member 5 provides bending member 4 with a force against second spring 12 and moves bending member 4 upward, thereby preventing bending member 4 from interfering with the movement of push negative angle member 5.

Then, the driving device 8 is caused to drive the substrate 6 to continue the downward movement. As the driving member 9 continues to move down, the negative angle slope 51 of the negative angle slope 51 contacts and presses the portion of the target member 15 exposed outside the first die 2, and presses the portion of the target member 15 onto the bending slope 311 of the bending guide 31, thereby completing the negative angle bending of the target member 15, as shown in fig. 8.

Finally, the driving device 8 is made to drive the base plate 6 to move upwards, and thus the connecting plate 7, the driving device 8 and the driving member 9 are brought back to the original positions (as shown in fig. 4). At the same time, the negative angle pushing member 5 is also moved to the original position (as shown in fig. 4) by the fourth spring 14. The operator can then withdraw the bent target member 15 from the second die 3 in the horizontal direction.

Based on the foregoing description, it can be understood by those skilled in the art that, in the present invention, the target member 15 is clamped by the first die 2 and the second die 3, then the bending member 4 bends the target member 15 clamped by the first die 2 and the second die 3, and then the negative angle pushing member 5 pushes the portion of the target member 15 bent by the bending member 4, so that the target member 15 forms a negative angle bend. Therefore, the utility model discloses a mould of bending only can realize through a mould of bending that the negative angle of panel is bent, for prior art, not only reduced the process of bending of panel, but also promoted the efficiency of bending of panel.

Further, the utility model discloses an in-process of bending target member 15 of the mould of bending can make the member of bending 4 push away negative angle inclined plane 51 through the inclined plane 41 that resets on the horizontal direction to force and push away negative angle component 5 and keep away from the guide portion 31 of bending, thereby avoid pushing away negative angle component 5 and interfere the member of bending 4 and descend. Also, the negative angle pushing member 5 presses the return slope 41 upward by the negative angle pushing slope 51 to force the bending member 4 to rise, thereby avoiding interference of the bending member 4 with the negative angle pushing member 5 approaching the bending guide 31. In short, the bending member 4 and the negative angle pushing member 5 of the present invention can be driven to each other, and specifically, one of the bending member 4 and the negative angle pushing member 5, which is currently used for the bending target member 15, can be driven to reset the other. Therefore, the bending member 4 and the negative angle pushing member 5 of the present invention do not interfere with each other.

Further, the utility model discloses a drive arrangement 8 drive base plate 6 removes, provides the power of keeping away from base plate 6 for first mould 2 through first spring 11, provides the power of keeping away from base plate 6 for bending member 4 through second spring 12, pushes away negative angle component 5 through the drive of drive component 9 and is close to second mould 3, makes the utility model discloses a mould of bending only need just can make first mould 2, bending member 4 and push away negative angle component 5 through one or a set of drive arrangement 8 and remove according to the order, and then accomplishes bending of target component 15 and push away the negative angle, has simplified the process of bending of target component 15.

So far, the technical solution of the present invention has been described in connection with the foregoing embodiments, but it is easily understood by those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Without deviating from the technical principle of the present invention, those skilled in the art can split and combine the technical solutions in the above embodiments, and also can make equivalent changes or substitutions for related technical features, and any changes, equivalent substitutions, improvements, etc. made within the technical concept and/or technical principle of the present invention will fall within the protection scope of the present invention.

Claims (10)

1. The bending die is characterized by comprising a first die, a second die, a bending component and a negative angle pushing component;

the first die and the second die can be relatively close to or far away from each other, and the first die and the second die are used for clamping a target component;

the bending member is used for bending the target member clamped by the first die and the second die;

the negative angle pushing component is used for pushing the part of the target component bent by the bending component so as to enable the target component to form a negative angle bend.

2. The bending die according to claim 1,

the first die is a movable die, and the second die is a fixed die;

the first die is positioned above the second die, and the first die moves in a vertical direction.

3. The bending die of claim 2,

the bending member is provided so as to be movable relative to the second die; and/or the like and/or,

the bending member is located outside the first die and/or the second die in a direction perpendicular to a direction in which the first die moves, so that the bending member bends a portion of the target member exposed outside the first die.

4. The bending die of claim 3,

the bending member is movable up and down relative to the first die;

the side portion of the second die corresponding to the bending member is provided with a bending guide portion for assisting the bending member in bending the target member downward.

5. The bending die of claim 4,

the negative angle pushing component can move towards the direction close to or far away from the bending guide part in the horizontal direction;

the negative angle pushing member is used for pushing the part of the target member bent by the bending member to the bottom surface of the bending guide part, so that the target member forms a negative angle bending.

6. The bending die of claim 5,

the bottom surface of the bending guide part is an inclined surface and is recorded as a bending inclined surface;

the negative angle pushing component is provided with a negative angle pushing inclined plane matched with the bending inclined plane.

7. The bending die of claim 6,

the bending component is provided with a reset inclined plane corresponding to the negative pushing angle inclined plane,

the bending component extrudes the negative angle pushing slope in the horizontal direction through the reset slope so as to force the negative angle pushing component to be far away from the bending guide part, and therefore the negative angle pushing component is prevented from interfering the bending component to descend.

8. The bending die according to any one of claims 1 to 7,

the bending die also comprises an upper die holder and a lower die holder which are fixed together,

the first die and the bending member are mounted on the upper die base,

the second die and the negative angle pushing component are mounted on the lower die base.

9. The bending die according to claim 8,

the negative angle pushing component is provided with an auxiliary driving inclined plane;

the mould of bending still includes:

a base plate mounted to the upper die base so as to be movable relative thereto in a vertical direction, the first die and the bending member being respectively mounted below the base plate so as to be movable in the vertical direction;

the driving device is used for driving the substrate to move;

a first spring for providing a force to the first die away from the substrate;

a second spring for providing a force to the bending member away from the substrate;

the driving component is fixedly connected with the substrate, the bottom of the driving component extends to the lower part of the substrate and is provided with a main driving inclined plane, and the main driving inclined plane is matched with the auxiliary driving inclined plane, so that the driving component drives the negative angle pushing component to be close to the second die.

10. The bending die of claim 9,

the bending die further comprises a connecting plate and a third spring, the connecting plate is arranged between the base plate and the first die, the first spring is arranged between the connecting plate and the first die, the second spring is arranged between the connecting plate and the bending member, and the third spring is arranged between the connecting plate and the base plate; and/or the like and/or,

the bending die further comprises a fourth spring for providing the negative angle pushing member with a force close to the second die.

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