A bending die structure for precision sheet metal

Abstract

The utility model discloses a kind of bending die structures for precision sheet metal, belong to sheet metal bending processing technical field. Including bending upper die and bending lower die, the bottom side of bending upper die is rotatably connected with two bending roller shafts, bending roller shaft is provided with right-angle notch along its axial direction, bending roller shaft can be rotated to the side of right-angle notch on it and the bottom side of bending upper die is flush, and the right-angle notch on two bending roller shafts can be formed with concave notch with bending upper die bottom side surrounding, the top of bending lower die is provided with the convex notch corresponding with concave notch. A kind of bending die structure for precision sheet metal of the utility model, can complete the multiple bending process of workpiece by one stamping, to significantly improve the efficiency of workpiece bending processing.

Description

Technical Field

[0001] This utility model belongs to the field of sheet metal bending processing technology, specifically relating to a bending die structure for precision sheet metal. Background Technology

[0002] In precision sheet metal processing, bending is one of the key steps. Currently, the industry generally adopts a "one-bend-at-a-time" processing mode. In this mode, the bending machine needs to complete one bending operation in a single complete process, which results in extremely low processing output per cycle, seriously reducing overall production efficiency and making it difficult to meet the needs of large-scale, high-efficiency production. Meanwhile, the existing Cape stamping dies used in processing have high design, manufacturing, and maintenance costs. When processing precision sheet metal in multiple specifications and small batches, the dies have poor versatility and require frequent replacement of Cape stamping dies of different specifications, which further increases production costs and is seriously uneconomical, making it difficult for enterprises to control production expenses and enhance market competitiveness. Therefore, there is an urgent need for a precision sheet metal bending die that can be used with existing CNC bending machines and hydraulic bending machines to solve the problems of low processing efficiency and high die cost. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a precision sheet metal bending die structure that can complete multiple bending processes of a workpiece in one stamping, thereby significantly improving the efficiency of workpiece bending processing.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a precision sheet metal bending die structure, including an upper bending die and a lower bending die, wherein two bending rollers are rotatably connected to the bottom side of the upper bending die, and the bending rollers are provided with right-angle slots along their axial direction. The bending rollers can rotate until one side of the right-angle slots is flush with the bottom side of the upper bending die, and the right-angle slots on the two bending rollers can form a concave slot with the bottom side of the upper bending die. The top of the lower bending die is provided with a convex slot corresponding to the concave slot.

[0005] Optionally, the bottom side of the upper bending die is provided with an arc-shaped groove for movably embedding the bending roller shaft. The arc-shaped groove is clearance-fitted with the bending roller shaft, and the distance between the opening ends of the arc-shaped groove is smaller than the diameter of the bending roller shaft.

[0006] Optionally, the arc-shaped groove penetrates the bottom side of the upper bending die, and the upper bending die is detachably connected to a stop block corresponding to the arc-shaped groove, the stop block being provided with a stop foot extending to the end of the arc-shaped groove.

[0007] Optionally, the end of the bending roller shaft is fixedly connected along its axial direction to a limiting post that can overlap the stop portion, and the end of the bending roller shaft is provided with a first spring positioning post, and the upper bending die is provided with a second spring positioning post corresponding to the first spring positioning post. A reset tension spring is provided between the first spring positioning post and the second spring positioning post for driving the bending roller shaft to rotate until the limiting post overlaps with the stop portion.

[0008] Optionally, when the limiting post overlaps the stop portion, the right-angle slot on the bending roller shaft faces the lower bending die.

[0009] Optionally, when the limiting post overlaps the stop portion, the opening edges of the right-angle slots on the two bending roller shafts are parallel to the bottom side of the upper bending die.

[0010] Optionally, a positioning baffle is also provided on one side of the lower bending die.

[0011] Optionally, the top of the upper bending die is provided with a first mounting part, and the bottom side of the lower bending die is provided with a second mounting part.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: The bending die structure in this technical solution can use a rotatable bending roller shaft with a right-angle groove to rotate during the pressing of the workpiece. Due to uneven force, the roller shaft rotates, and a concave groove is formed on the bottom side of the lower bending die to match the convex groove on the lower bending die. This ensures the fit of the workpiece during bending and also allows for multiple bends to be performed on the workpiece at one time, thereby improving the efficiency of workpiece bending processing. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the bending die structure in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the structure when the edge of the right-angle groove on the bending roller shaft is pressed down on the workpiece in a preferred embodiment of this utility model; Figure 3 This is a schematic diagram of the bending die structure in a preferred embodiment of the present invention when the workpiece is bent. Figure 4 This is a schematic diagram of the structure in a preferred embodiment of the present invention when a concave groove is formed between the bottom side of the upper bending die and the right-angle groove on the bending roller shaft; Among them, 1. Bending upper die; 101. Concave groove; 102. Arc groove; 2. Bending lower die; 201. Convex groove; 3. Bending roller shaft; 301. Right angle groove; 4. Stop block; 401. Stop foot; 5. Limiting post; 6. First spring positioning post; 7. Second spring positioning post; 8. Reset tension spring; 9. Positioning baffle. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0016] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example 1

[0017] like Figures 1-4 As shown, a precision sheet metal bending die structure includes an upper bending die 1 and a lower bending die 2. Two bending roller shafts 3 are rotatably connected to the bottom side of the upper bending die 1. The bending roller shafts 3 are provided with right-angle slots 301 along their axial direction. The bending roller shafts 3 can rotate until one side of the right-angle slots 301 is flush with the bottom side of the upper bending die 1. The right-angle slots 301 on the two bending roller shafts 3 can form a concave slot 101 with the bottom side of the upper bending die 1. The top of the lower bending die 2 is provided with a convex slot 201 corresponding to the concave slot 101.

[0018] As described above, the upper bending die 1 has a first mounting part on its top, and the lower bending die 2 has a second mounting part on its bottom side. Specifically, the first and second mounting parts can adopt existing standard connecting flange structures, T-bolt slot + locating key combination structures, etc. The upper bending die 1 and lower bending die 2 can be mounted on an existing bending machine using the first and second mounting parts, and the bending machine drives the bending operation. During the bending operation, the operator can first place the workpiece to be bent flat on the top of the lower bending die 2, and support the workpiece through the convex slot 201 on the lower bending die 2. The position of the lower bending die 2 remains fixed, while the bending machine drives the upper bending die 1 to press down towards the lower bending die 2 until the two sides of the right-angle slot 301 on the bending roller shaft 3 abut against the upper surface of the workpiece, at which point the workpiece is fixed. It should be noted that at this time, the bending roller 3 presses down on the right-angle groove 301 on the upper surface of the workpiece. One edge of the roller is located at the protruding position in the middle of the convex groove 201, while the other edge is located at the recessed positions on both sides of the convex groove 201. Specifically, as shown below... Figure 2 As shown. Then, as... Figure 3 As shown, when the lower bending die 2 continues to press down on the workpiece, the bending roller shaft 3 will rotate relative to the upper bending die 1 until the right-angle slots 301 on the two bending roller shafts 3 and the bottom side of the upper bending die 1 form a concave slot 101, which, together with the convex slot 201 on the top of the lower bending die 2, enables a bending operation of multiple bends on the workpiece in one go. Moreover, the bending die structure in this technical solution is simpler and has a relatively lower manufacturing cost compared to traditional bending dies.

[0019] Furthermore, such as Figure 1 As shown, the bottom side of the upper bending die 1 is provided with an arc-shaped groove 102 for movably embedding the bending roller shaft 3. The arc-shaped groove 102 and the bending roller shaft 3 are in clearance fit, and the clearance fit accuracy can reach IT7-IT8 level (0.01-0.15mm) to ensure the bending accuracy of the workpiece. The distance between the opening ends of the arc-shaped groove 102 is smaller than the diameter of the bending roller shaft 3 to prevent the bending roller shaft 3 from falling out of the arc-shaped groove 102.

[0020] It is important to note that, such as Figures 1-4 As shown, the arc-shaped slot 102 penetrates the bottom side of the upper bending die 1, and a stop block 4 corresponding to the arc-shaped slot 102 is detachably connected to the upper bending die 1. Specifically, the stop block 4 is provided with a bolt that can be threadedly connected to the upper bending die 1 to fix the stop block 4 to the upper bending die 1. The stop block 4 is provided with a stop foot 401 extending to the end of the arc-shaped slot 102, which can be used to prevent the bending roller shaft 3 from disengaging from the arc-shaped slot 102. When it is necessary to remove the bending roller shaft 3 from the upper bending die 1 for replacement, simply loosen the bolt and remove the stop block 4 to push the roller shaft out of the arc-shaped slot 102. Example 2

[0021] like Figures 1-4 As shown, based on Embodiment 1, a limiting post 5 that can overlap the stop portion 401 is fixedly connected to the end of the bending roller shaft 3 along its axial direction to limit the rotation direction of the bending roller shaft 3. Simultaneously, a first spring positioning post 6 is provided at the end of the bending roller shaft 3, and a second spring positioning post 7 corresponding to the first spring positioning post 6 is provided on the upper bending die 1. A return spring 8 is provided between the first spring positioning post 6 and the second spring positioning post 7 to drive the bending roller shaft 3 to rotate until its upper limit post 5 overlaps with the stop portion 401. Specifically, the two ends of the return spring 8 can be respectively sleeved on the first spring positioning post 6 and the second spring positioning post 7, as shown... Figure 2 , Figure 3 As shown, when the bending roller shaft 3 rotates relative to the bending upper die 1, the first spring positioning column 6 fixedly connected to its end will also rotate, thereby pulling the reset spring 8 to stretch. After the bending roller shaft 3 rotates due to bending the workpiece, it can be reset under the traction of the reset spring 8, which facilitates the next bending operation.

[0022] It should be noted that in this technical solution, if... Figure 1 , Figure 2 As shown, when the limiting post 5 overlaps with the stop part 401, the right angle slot 301 on the bending roller shaft 3 faces the lower bending die 2.

[0023] Furthermore, such as Figure 2 As shown, when the limiting post 5 is attached to the foot 401, the opening edges of the right angle slots 301 on the two bending roller shafts 3 are parallel to the bottom side of the upper bending die 1, so that the two bending roller shafts 3 can press down on the upper surface of the workpiece placed on the lower bending die 2 at the same time, avoiding the workpiece from shifting position due to uneven force.

[0024] Meanwhile, to ensure the uniqueness of the workpiece bending position, in this technical solution, a positioning baffle 9 can be set on one side of the lower bending die 2. That is, when the operator places the workpiece on the lower bending die 2, one side of it can be placed against the positioning baffle 9 to achieve the positioning of the workpiece.

[0025] Working Principle: During bending operations, the operator first places the workpiece to be bent flat on top of the lower bending die 2, supported by the convex groove 201 on the lower bending die 2. The bending machine drives the upper bending die 1 to press down towards the lower bending die 2 until the two sides of the right-angle groove 301 on the bending roller shaft 3 abut against the upper surface of the workpiece, at which point the workpiece is fixed. Subsequently, as the lower bending die 2 continues to press down on the workpiece, the bending roller shaft 3 rotates relative to the upper bending die 1 until the right-angle grooves 301 on the two bending roller shafts 3 and the bottom side of the upper bending die 1 form a concave groove 101, which, together with the convex groove 201 on the top of the lower bending die 2, enables multiple bending operations on the workpiece in one operation.

[0026] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A bending die structure for precision sheet metal, characterized in that: The device includes an upper bending die (1) and a lower bending die (2). The bottom side of the upper bending die (1) is rotatably connected to two bending roller shafts (3). The bending roller shafts (3) are provided with right-angle slots (301) along their axial direction. The bending roller shafts (3) can rotate until one side of the right-angle slots (301) on them is flush with the bottom side of the upper bending die (1). The right-angle slots (301) on the two bending roller shafts (3) can form a concave slot (101) with the bottom side of the upper bending die (1). The top of the lower bending die (2) is provided with a convex slot (201) corresponding to the concave slot (101).

2. The precision sheet metal bending die structure according to claim 1, characterized in that: The bottom side of the upper bending die (1) is provided with an arc-shaped groove (102) for movably embedding the bending roller shaft (3). The arc-shaped groove (102) is in clearance fit with the bending roller shaft (3), and the distance between the opening ends of the arc-shaped groove (102) is smaller than the diameter of the bending roller shaft (3).

3. The precision sheet metal bending die structure according to claim 2, characterized in that: The arc-shaped groove (102) penetrates the bottom side of the bending upper die (1), and the bending upper die (1) is detachably connected to a stop block (4) corresponding to the arc-shaped groove (102), and the stop block (4) is provided with a stop foot (401) extending to the end of the arc-shaped groove (102).

4. The precision sheet metal bending die structure according to claim 3, characterized in that: The end of the bending roller shaft (3) is fixedly connected along its axial direction to a limiting post (5) that can overlap the stop part (401), and the end of the bending roller shaft (3) is provided with a first spring positioning post (6), and the upper bending die (1) is provided with a second spring positioning post (7) corresponding to the first spring positioning post (6). A reset tension spring (8) is provided between the first spring positioning post (6) and the second spring positioning post (7) for driving the bending roller shaft (3) to rotate until the limiting post (5) overlaps with the stop part (401).

5. The precision sheet metal bending die structure according to claim 4, characterized in that: When the limiting post (5) overlaps the foot stop (401), the right angle slot (301) on the bending roller shaft (3) faces the bending lower die (2).

6. The precision sheet metal bending die structure according to claim 4, characterized in that: When the limiting post (5) overlaps the foot stop (401), the opening edges of the right angle slots (301) on the two bending roller shafts (3) are parallel to the bottom side of the bending upper die (1).

7. The precision sheet metal bending die structure according to claim 3, characterized in that: It also includes a positioning baffle (9) disposed on one side of the lower bending die (2).

8. The precision sheet metal bending die structure according to claim 1, characterized in that: The upper bending die (1) has a first mounting part on its top, and the lower bending die (2) has a second mounting part on its bottom side.

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