CN212190868U

CN212190868U - Multistage bending die structure

Info

Publication number: CN212190868U
Application number: CN202020482902.4U
Authority: CN
Inventors: 曹光伟; 段华平; 钱飞; 俞铖斌; 郑波; 周勇
Original assignee: Ningbo Kdpr Tool Technology Co ltd
Current assignee: Ningbo Kdpr Tool Technology Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-12-22
Anticipated expiration: 2030-04-07

Abstract

The utility model discloses a multistage mould structure of bending, it includes the mould, the lower mould, it is provided with at least two sets of mechanisms of bending between last mould and the lower mould, the mechanism of bending arranges along material area moving direction in proper order, the mechanism of bending includes the drift, the die of bending, the cushion, die and cushion block combination concave font structure of bending, the drift sets up in die and cushion top of bending, be equipped with first locating surface on the drift, first working face, the first working face of a set of drift in back is greater than the first working face of a set of drift in the front and the difference in height of first locating surface with the difference in height of first locating surface, the height that highly is less than the height of a set of cushion in the front of a set of cushion in the back. The workpiece can be bent for many times, the bending depth of the next time is deeper than that of the previous time until the target size is reached, the number of the bending mechanisms can be determined according to the required bending depth of the workpiece, the workpiece can be more stable during forming, and the condition that the workpiece is not uniformly stretched or is easy to break is avoided.

Description

Multistage bending die structure

Technical Field

The utility model relates to a stamping die's technical field specifically is a multistage bending die structure.

Background

Stamping is a processing method with high production efficiency and low material consumption. The stamping process is suitable for production of large-batch part products, is convenient for realizing mechanization and automation, has higher production efficiency, and simultaneously, the stamping production can not only strive to realize production with less waste materials and no waste materials, but also can fully utilize the leftover materials even if the leftover materials exist in certain conditions.

In the conventional press forming process, when a workpiece with a large bending depth is formed, the workpiece is generally formed by one-time direct press forming, but such a form is relatively easy to cause the conditions of workpiece fracture, uneven wall thickness of a stretching part and the like.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: the multi-stage bending die structure is uniform and stable in stretching state and not easy to break workpieces.

The utility model adopts the technical proposal that: the utility model provides a multistage mould structure of bending, it includes mould, lower mould, go up the mould with set up at least two sets of mechanisms of bending between the lower mould, the mechanism of bending arranges in proper order along work piece moving direction, the mechanism of bending includes the drift, the die, the cushion of bending, the die of bending with the cushion block makes up into the character cut in bas-relief structure, the drift sets up die and cushion top of bending, and wherein the back is a set of the punching press degree of depth of the mechanism of bending is greater than the preceding a set of the punching press degree of depth of the mechanism of bending.

After the structure more than adopting, the utility model discloses a multistage mould structure of bending has following advantage compared with prior art: firstly, a plurality of groups of bending mechanisms are arranged along the moving direction of a workpiece, the workpiece is molded by matching a bending female die with a cushion block, the bending mechanisms can perform bending actions for a plurality of times, the workpiece is moved to the next group of bending mechanisms to perform the next group of bending actions after the previous group of bending actions are completed, the bending depth of each next time is deeper than the depth of the previous time until the required size is reached, and the bending mechanisms can be determined according to the required bending depth of the workpiece by the arrangement, so that the workpiece can be bent for a plurality of times, the workpiece can be more stable during molding, and the condition that the workpiece is not uniformly stretched or is easy to break is avoided; simultaneously, the setting of cushion can be convenient for change, and when dealing with different work pieces, need carry out the during operation of bending of the different degree of depth, change the cushion as required, alright in order being suitable for whole mechanism is more nimble, great improvement the general nature of whole structure.

Preferably, the punch width of the latter set of bending mechanisms is greater than the punch width of the former set of bending mechanisms. The arrangement can ensure that the bending point keeps fixed position when the workpiece is bent, the forming effect is good through automatic shrinkage forming of materials, and the wall thickness of the bent part after forming is uniform and stable.

Preferably, the bending female die is provided with a chamfer. The chamfer on the die can make the contact surface of work piece and die level and smooth, has avoided sharp-pointed limit on the die to cause too much damage to the work piece, and the chamfer can more laminate the shape of back work piece of bending simultaneously, the work piece shaping of being more convenient for.

Preferably, the upper die and the lower die are further provided with a shaping mechanism, the shaping mechanism is arranged behind the bending mechanism along the moving direction of the workpiece, the shaping mechanism comprises a shaping punch, a shaping female die and a shaping cushion block, the shaping female die and the shaping cushion block are combined into a concave structure, the shaping punch is arranged above the shaping female die and the shaping cushion block, the upper surface of the shaping cushion block is downwards sunken, and a structure with low middle part and high two sides is formed. The workpiece can take place certain resilience phenomenon when bending the action, and shaping cushion of plastic mechanism is middle low both sides high structure, cooperatees with the plastic drift, acts on the work piece, makes the angle of bending of work piece slightly be greater than required angle, later reaches required angle through the resilience of work piece, and the setting up of plastic mechanism makes the finished product work piece can reach the state of requirement, ensures processingquality.

Preferably, the press depth of the shaping mechanism is the same as the press depth of the last bending mechanism. The stamping depth of the shaping mechanism is the same as that of the last bending mechanism, so that the bending depth of the workpiece can be guaranteed not to change, and the processing quality is guaranteed.

Preferably, the upper die comprises an upper die base, a base plate and a fixing plate, the base plate is connected to the upper die base, the fixing plate is connected to the base plate, and the punch or the shaping punch penetrates through the fixing plate and is abutted to the base plate; the lower die comprises a lower die base and a lower die base plate, the lower die base plate is connected to the lower die base, and the lower end of the cushion block or the lower end of the shaping cushion block is connected with the lower die base plate. The base plate and the fixing plate are used for installing the punch or the shaping punch on the upper die base so as to enable the punch or the shaping punch to move along with the upper die base; the lower die base and the lower die base plate are used for supporting a cushion block and a bending female die or a shaping cushion block and a shaping female die of the bending mechanism, and the whole structure is stable.

Preferably, a stripper plate is further arranged between the upper die and the lower die, and a hole for the punch or the shaping punch to pass through is formed in the stripper plate. The stripper plate can be used for separating a workpiece from the punch or the shaping punch after punching is finished, and can also be used for guiding the punch or the shaping punch so as to ensure the accuracy of a working position.

Preferably, the die further comprises a limiting assembly, wherein the limiting assembly comprises an upper limiting column and a lower limiting column, the upper limiting column is connected with the upper die, the lower limiting column is connected with the lower die, and the upper limiting column is opposite to the lower limiting column in position. The upper limiting column and the lower limiting column are used for limiting the limit position of the punch or the shaping, and the phenomenon that the workpiece is scrapped or self-damaged due to the fact that the moving position of the punch or the shaping punch is too large is avoided.

Drawings

Fig. 1 is a schematic view of a multi-stage bending die structure according to the present invention.

FIG. 2 is a schematic partial cross-sectional view taken along line A-A in FIG. 1.

FIG. 3 is a schematic partial cross-sectional view of "B-B" in FIG. 1.

Fig. 4 is a schematic structural diagram of a bending mechanism in a multistage bending die structure of the present invention.

Fig. 5 is an enlarged view of a portion "C" in fig. 4.

Fig. 6 is a schematic structural diagram of a shaping mechanism in a multistage bending die structure of the present invention.

Fig. 7 is an enlarged view of a portion "D" in fig. 6.

Wherein, 1, a bending mechanism; 1.1, a punch; 1.11, a first positioning surface; 1.12, a first working surface; 1.2, bending the female die; 1.3, cushion blocks; 2. an upper die; 2.1, an upper die base; 2.2, a base plate; 2.3, fixing a plate; 3. a lower die; 3.1, a lower die holder; 3.2, a lower die base plate; 4. a shaping mechanism; 4.1, shaping a punch; 4.11, a second positioning surface; 4.12, a second working surface; 4.2, shaping the female die; 4.3, shaping cushion blocks; 5. a stripper plate; 6.1, upper limiting column; 6.2, a lower limiting column; 7. and (5) a workpiece.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

The utility model provides a multistage mould structure of bending, it includes last mould 2, lower mould 3, it sets up a plurality of groups mechanism 1 of bending between last mould 2 and lower mould 3, a plurality of groups mechanism 1 of bending arrange along 7 moving directions of work piece in proper order, mechanism 1 of bending includes drift 1.1, bending die 1.2, cushion 1.3, bending die 1.2 makes up into the structure of type cut in bas-relief with cushion 1.3, drift 1.1 sets up above bending die 1.2 and cushion 1.3, wherein, the lower terminal surface of drift 1.1 is its first working face 1.12, be equipped with a step above first working face 1.12, the step face is first locating surface 1.11; and a chamfer is arranged on the bending female die 1.2.

Still be provided with plastic mechanism 4 between last mould 2 and lower mould 3, plastic mechanism 4 arranges in the mechanism 1 rear of bending along work piece 7 moving direction, plastic mechanism 4 includes plastic drift 4.1, plastic die 4.2, plastic cushion 4.3, plastic die 4.2 and plastic cushion 4.3 make up into the structure of type of calligraphy in bas-relief, plastic drift 4.1 sets up in plastic die 4.2 and plastic cushion 4.3 top, the center of the upper surface of plastic cushion 4.3 is sunken downwards slightly, form the low both sides high structure in the middle of the formation.

The upper die 2 comprises an upper die base 2.1, a backing plate 2.2 and a fixing plate 2.3, the backing plate 2.2 is connected to the upper die base 2.1, the fixing plate 2.3 is connected to the backing plate 2.2, and the punch 1.1 or the shaping punch 4.1 penetrates through the fixing plate 2.3 and is abutted to the backing plate 2.2; the lower die 3 comprises a lower die base 3.1 and a lower die base plate 3.2, the lower die base plate 3.2 is connected to the lower die base 3.1, and the lower end of the cushion block 1.3 or the lower end of the shaping cushion block 4.3 is connected with the lower die base plate 3.2; a stripper plate 5 is arranged between the upper die 2 and the lower die 3, and a hole for the punch 1.1 or the shaping punch 4.1 to pass through is arranged on the stripper plate 5; the upper die 2 is also connected with an upper limiting column 6.1, the lower die 3 is also connected with a lower limiting column 6.2, and the upper limiting column 6.1 is opposite to the lower limiting column 6.2.

According to the attached drawing 1 in the specification, in the present embodiment, 6 groups of

bending mechanisms

1 and 1 group of shaping mechanisms 4 are provided, and from left to right, there are a first group of bending mechanisms, a second group of bending mechanisms, a third group of bending mechanisms, a fourth group of bending mechanisms, a fifth group of bending mechanisms, a sixth group of bending mechanisms and a shaping mechanism 4, respectively, wherein the height difference between a first working surface 1.12 and a first positioning surface 1.11 of a punch 1.1 of the bending mechanisms 1 is a, the height of a cushion block 1.3 is b, the width of the first working surface 1.12 of the punch 1.1 is c, and the height difference between a second working surface 4.12 and a second positioning surface 4.11 of the punch 1.1 of the shaping mechanism 4 is d; the height difference between the first working surface 1.12 and the first positioning surface 1.11 of the punch 1.1 of the first bending mechanism 1 is that a1 is 0.31mm, the height b1 of the cushion block 1.3 is 25.8mm, and the width c1 of the first working surface 1.12 of the punch 1.1 is 27.88 mm; the height difference between the first working surface 1.12 and the first positioning surface 1.11 of the punch 1.1 of the second bending mechanism 1 is that a2 is 0.62mm, the height b2 of the cushion block 1.3 is 25.49mm, and the width c2 of the first working surface 1.12 of the punch 1.1 is 28.20 mm; the height difference between the first working surface 1.12 and the first positioning surface 1.11 of the punch 1.1 of the third bending mechanism group 1 is that a3 is 0.93mm, the height b3 of the cushion block 1.3 is 25.18mm, and the width c3 of the first working surface 1.12 of the punch 1.1 is 28.52 mm; the height difference between the first working surface 1.12 and the first positioning surface 1.11 of the punch 1.1 of the fourth bending mechanism 1 is that a4 is 1.24mm, the height b4 of the cushion block 1.3 is 24.87mm, and the width c4 of the first working surface 1.12 of the punch 1.1 is 28.84 mm; the difference in height between the first working surface 1.12 and the first positioning surface 1.11 of the punch 1.1 of the fifth bending mechanism group 1 is that a5 is 1.55mm, the height b5 of the cushion block 1.3 is 24.56mm, and the width c5 of the first working surface 1.12 of the punch 1.1 is 29.16 mm; the difference in height between the first working surface 1.12 and the first positioning surface 1.11 of the punch 1.1 of the sixth set of bending mechanisms 1 is that a6 is 1.85mm, the height b6 of the cushion block 1.3 is 24.25mm, and the width c6 of the first working surface 1.12 of the punch 1.1 is 29.46 mm; the punching depth of each rear bending mechanism is larger than that of the front bending mechanism, the bending depth of the workpiece 7 is 1.85mm through continuous operation of the 6 bending mechanisms 1, the height difference d between the second working surface 4.12 and the second positioning surface 4.11 of the shaping punch 4.1 of the shaping mechanism 4 is 1.85mm, and the height difference d is the same as the height difference a6 between the first working surface 1.12 and the first positioning surface 1.11 of the punch 1.1 of the sixth bending mechanism 1, so that the punching depth of the shaping mechanism 4 is the same as that of the sixth bending mechanism, and the bending depth of the workpiece 7 is ensured not to change during the shaping operation.

The working principle is that a workpiece 7 is placed on a stamping die, the workpiece 7 enters a die from the left side, sequentially and continuously passes through each group of bending mechanisms 1, the bending depth of the workpiece 7 is increased along with the working procedure through the matching action of a punch 1.1, a bending female die 1.2 and a base plate 2.2, the target depth is finally reached, then the workpiece 7 is moved to a shaping mechanism 4, the bending angle of the workpiece 7 is slightly increased under the matching action of a shaping punch 4.1 and a shaping cushion block 4.3, and thus the bending angle of the workpiece 7 after rebounding can just meet the requirement.

While the above is directed to the preferred embodiment of the present invention, it is not intended that it be limited, except as by the appended claims. The present invention is not limited to the above embodiments, and the specific structure thereof allows for changes, all the changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a multistage mould structure of bending, it includes mould (2), lower mould (3), its characterized in that, go up mould (2) with be provided with at least two sets of mechanism (1) of bending between lower mould (3), the mechanism (1) of bending arranges along work piece (7) moving direction in proper order, the mechanism (1) of bending includes drift (1.1), the die (1.2), cushion (1.3) of bending, die (1.2) of bending with cushion (1.3) make up into the character cut in bas-relief structure, drift (1.1) set up die (1.2) and cushion (1.3) top of bending, a set of after wherein the punching press degree of depth of the mechanism (1) of bending is greater than a set of before the punching press degree of depth of the mechanism (1) of bending.

2. A multistage bending die structure according to claim 1, wherein the width of the first working surface (1.12) of the punches (1.1) of the latter set of bending mechanisms (1) is greater than the width of the first working surface (1.12) of the punches (1.1) of the former set of bending mechanisms (1).

3. A multistage bending die structure according to claim 1, wherein the bending die (1.2) is provided with a chamfer.

4. The multi-stage bending die structure according to claim 1, wherein a shaping mechanism (4) is further arranged between the upper die (2) and the lower die (3), the shaping mechanism (4) is arranged behind the bending mechanism (1) along the moving direction of the material belt, the shaping mechanism (4) comprises a shaping punch (4.1), a shaping die (4.2) and a shaping cushion block (4.3), the shaping die (4.2) and the shaping cushion block (4.3) are combined into a concave structure, the shaping punch (4.1) is arranged above the shaping die (4.2) and the shaping cushion block (4.3), the upper surface of the shaping cushion block (4.3) is recessed downwards to form a structure with a low middle part and high parts.

5. A multi-stage bending die structure according to claim 4, wherein the press depth of the reforming mechanism (4) is the same as the press depth of the last set of bending mechanisms (1).

6. A multi-stage bending die structure according to claim 4, wherein the upper die (2) comprises an upper die holder (2.1), a backing plate (2.2) and a fixing plate (2.3), the backing plate (2.2) is connected to the upper die holder (2.1), the fixing plate (2.3) is connected to the backing plate (2.2), and the punch (1.1) or the shaping punch (4.1) penetrates through the fixing plate (2.3) to abut against the backing plate (2.2); the lower die (3) comprises a lower die base (3.1) and a lower die base plate (3.2), the lower die base plate (3.2) is connected to the lower die base (3.1), and the lower end of the cushion block (1.3) or the shaping cushion block (4.3) is connected with the lower die base plate (3.2).

7. A multi-stage bending die structure according to claim 4, wherein a stripper plate (5) is further arranged between the upper die (2) and the lower die (3), and the stripper plate (5) is provided with a hole for the punch (1.1) or the shaping punch (4.1) to pass through.

8. The multi-stage bending die structure according to claim 1, further comprising a limiting assembly, wherein the limiting assembly comprises an upper limiting column (6.1) and a lower limiting column (6.2), the upper limiting column (6.1) is connected with the upper die (2), the lower limiting column (6.2) is connected with the lower die (3), and the upper limiting column (6.1) is opposite to the lower limiting column (6.2).