Stamping die capable of achieving 90-degree bending through single stamping

Abstract

The utility model relates to the technical field of progressive dies, in particular to a stamping die capable of realizing 90-degree bending through single stamping, which comprises an upper die main body and a lower die main body which are matched with each other in a stamping manner, a punch is arranged on the upper die main body, a bending station is arranged on the lower die main body, and a bending insert right opposite to the lower part of the punch is inlaid on the bending station. A front-end limiting piece and a rear-end limiting piece which are used for abutting against the two ends of a workpiece are arranged at the front position and the rear position of the bending station on the lower die body respectively, and side limiting pieces used for abutting against the two sides of the workpiece are arranged at the left position and the right position of the bending station on the lower die body; through the design of the integrated bending insert and the punch, a plurality of independent stations and die parts required in a traditional two-section type bending process are reduced, and the die structure is simplified, so that the material consumption of the die is reduced, the raw material cost in the manufacturing process is reduced, and meanwhile, the transportation, installation and maintenance cost of the die is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous dies, in particular to a stamping die capable of achieving 90-degree bending in a single stamping. Background Art

[0002] In the field of sheet metal processing, for some sheet metal products that need to be produced in small batches, the bending process is a key link in their forming process. Among them, a specific sheet metal part needs to be precisely bent 90 degrees. When dealing with the 90-degree bending requirements of such sheet metal parts, traditional bending methods generally adopt a two-stage bending method. Specifically, the sheet metal part is first bent 45 degrees, and then further bent 90 degrees on this basis to achieve the final 90-degree bending effect.

[0003] However, this traditional two-stage bending process has many disadvantages. From the mold perspective, in order to achieve the above-mentioned two-stage bending operation, the mold needs to be set up with two independent workstations accordingly. Each workstation needs to be equipped with a specific bending structure and related components, which makes the overall structure of the mold more complex and bulky. The complex structure will inevitably lead to a large increase in the amount of mold material, which not only increases the cost of raw materials in the mold manufacturing process, but also brings higher costs in terms of mold transportation, installation and subsequent maintenance. For sheet metal products produced in small batches, this high-cost mold setting method is particularly disadvantageous. Due to the small production batch size, the mold cost cannot be amortized through large-scale production, making the mold cost borne by each sheet metal part account for too high a proportion of the total cost, seriously affecting the economic benefits of the product. In addition, the two-stage bending process is relatively cumbersome in terms of operation process. It requires the transfer and repositioning of the workpiece between the two workstations. This also increases production time and reduces production efficiency to a certain extent, which is not conducive to meeting the current market demand for efficient and low-cost production of sheet metal products.

[0004] In summary, the existing traditional two-stage bending process and supporting molds for 90-degree bending of this type of sheet metal parts have obvious shortcomings in cost and efficiency, and a new bending solution and corresponding molds are urgently needed to improve them. Utility Model Content

[0005] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0006] A stamping die that can achieve a 90-degree bend in a single stamping, including an upper die body and a lower die body that are stamping and cooperating with each other. A punch is provided on the upper die body, and a bending station is provided on the lower die body. A bending insert is embedded in the bending station directly below the punch. Front-end limiters and rear-end limiters for resisting both ends of the workpiece are respectively provided at the front and rear positions of the bending station on the lower die body, and side limiters for resisting both sides of the workpiece are provided at the left and right positions of the bending station on the lower die body;

[0007] Among them, a bending groove is provided on the bending insert. The bending groove has a first inclined surface and a second inclined surface with an inclination angle of 45 degrees, and there is a groove bottom with an arc-shaped transition structure between the first inclined surface and the second inclined surface. There are arc-shaped transition structure chamfers between the first inclined surface and the second inclined surface and the upper end surface of the bending insert respectively; The lower end of the punch has a third inclined surface and a fourth inclined surface that match the first inclined surface and the second inclined surface, and there is a rounded corner with an arc-shaped transition between the third inclined surface and the fourth inclined surface.

[0008] Preferably, the upper die body includes an upper die fixing plate, a die handle installed on the upper die fixing plate, an upper backing plate installed at the lower end of the upper die fixing plate, and an upper clamping plate installed at the lower end of the upper backing plate. The punch is fixed to the lower end of the upper die fixing plate through the upper clamping plate.

[0009] Preferably, the lower die body includes a lower die fixing plate, a lower backing plate installed on the lower die fixing plate, and an insert plate installed on the lower backing plate. The bending insert, the front-end limiter, the rear-end limiter and the side limiter are all provided on the insert plate.

[0010] Preferably, limit columns are respectively connected to the upper die fixing plate and the lower die fixing plate, and the die closing between the upper die fixing plate and the lower die fixing plate is limited by the limit columns.

[0011] Preferably, the included angle between the third inclined surface and the fourth inclined surface is 89 degrees.

[0012] Preferably, the front end of the insert plate is provided with an extended section, and the front-end limiter is provided on the extended section.

[0013] Preferably, a U-shaped block is embedded on the extended section. The inner side of the U-shaped block is a slide rail structure, so that the front-end limiter is slidably connected to the inner side of the U-shaped block. Spring connection blocks are connected to both the inner end position of the U-shaped block and the front-end limiter, a tension spring is connected between the two spring connection blocks, and limit blocks are extended on the opposite surfaces of the two spring connection blocks.

[0014] Preferably, there are two bending stations, and each bending station is correspondingly provided with two groups of side limiters, and the two groups of side limiters are respectively located at the front and rear positions corresponding to the bending insert. ]>

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] Through the integrated design of the bending insert and the punch, the number of independent workstations and die components required in the traditional two-stage bending process is reduced, the die structure is simplified, thereby reducing the amount of die material used, lowering the raw material cost in the manufacturing process, and at the same time reducing the transportation, installation and maintenance costs of the die; and the simplified operation process reduces the transfer and repositioning of workpieces between different workstations, shortens the production time, and improves the production efficiency.

[0017] In addition, by adopting a bending insert made of a first inclined surface and a second inclined surface with a 45-degree inclination angle, in配合 with a punch structure having a third inclined surface and a fourth inclined surface, and using a precise inclined surface and arc surface transition structure design, the accuracy and consistency of the bending angle are ensured, and the appearance quality of the formed product and the accuracy of the bend angle size are improved. This die is particularly suitable for small-batch production because it reduces the die cost分摊 due to large-scale production, reduces the die cost borne by each sheet metal part, and improves the economic benefits.

[0018] Through the slide rail structure inside the C-shaped block, the front-end limiting member can be slid back and forth according to the dimensions of different workpieces or the requirements of the bending process. The tension spring connected to the front-end limiting member at the inner end position of the C-shaped block and the limiting block extending on the opposite surface further enhance the stability of the front-end limiting member during the positioning process, thereby accurately adapting to the front-end positioning requirements of various workpieces; this flexibility enables the die, when bending different specifications of sheet metal parts, without replacing the entire die or making large-scale modifications to the die, only by adaptively adjusting the position of the front-end limiting member according to the different lengths of the sheet metal parts to be processed, greatly improving the adaptability of the die to different workpieces, ensuring accurate positioning of the front end of the workpiece in all cases, and effectively reducing the bending error caused by inaccurate front-end positioning. [[ID=eleven]]

[0019] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] ​​​​​​

[0022] Figure 2 is a schematic cross-sectional structure diagram of the present utility model in the stamping state;

[0023] Figure 3 is a schematic structural diagram of the insert panel and various components disposed on the insert panel in the present utility model;

[0024] Figure 4 is a partial structural diagram of the front-end limiting member mounted on the lengthened section in the present utility model;

[0025] Figure 5 is a partial structural diagram of the punch and the bending groove in the present utility model.

[0026] The reference numerals and names in the figures are as follows:

[0027] upper die main body 10, punch 11, third inclined surface 111, fourth inclined surface 112, fillet 113, upper die fixing plate 12, die shank 13, upper backing plate 14, upper clamping plate 15, lower die main body 20, bending insert 21, front-end limiting member 22, rear-end limiting member 23, side limiting member 24, bending groove 240, first inclined surface 241, second inclined surface 242, groove bottom 243, chamfer 244, lower die fixing plate 25, backing plate 26, insert panel 27, limit post 30, lengthened section 40, U-shaped block 41, spring connecting block 42, tension spring 43, limit block 44. Specific embodiments

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figure 1-5 , in an embodiment of the present utility model, a stamping die for achieving a 90-degree bend by single stamping includes an upper die main body 10 and a lower die main body 20 that are in mutual stamping cooperation. A punch 11 is provided on the upper die main body 10, a bending station is provided on the lower die main body 20, and a bending insert 21 facing the lower part of the punch 11 is embeddedly provided at the bending station. Front-end limiting members 22 and rear-end limiting members 23 for abutting against both ends of the workpiece are respectively provided at the front and rear positions of the lower die main body 20 at the bending station, and side limiting members 24 for abutting against both sides of the workpiece are provided at the left and right positions of the lower die main body 20 at the bending station;

[0030] Among them, a bending groove 240 is opened on the bending insert 21, and the bending groove 240 has a first inclined surface 241 and a second inclined surface 242 with an inclination angle of 45 degrees, and a groove bottom 243 with an arc surface transition structure is provided between the first inclined surface 241 and the second inclined surface 242, and a chamfer 244 with an arc surface transition structure is provided between the first inclined surface 241 and the second inclined surface 242 and the upper end surface of the bending insert 21; the lower end of the punch 11 has a third inclined surface 111 and a fourth inclined surface 112 matching the first inclined surface 241 and the second inclined surface 242, and a rounded corner 113 with an arc surface transition is provided between the third inclined surface 111 and the fourth inclined surface 112.

[0031] The mold reduces the multiple independent workstations and mold components required in the traditional two-stage bending process through the integrated bending insert 21 and punch 11 design, simplifies the mold structure, thereby reducing the amount of mold material used, reducing the raw material cost in the manufacturing process, and also reducing the transportation, installation and maintenance costs of the mold; and the simplified operating process reduces the transfer and repositioning of workpieces between different workstations, shortens production time, and improves production efficiency.

[0032] In addition, by adopting a bending insert 21 made of a first bevel 241 and a second bevel 242 with an inclination angle of 45 degrees, in combination with a punch 11 structure having a third bevel 111 and a fourth bevel 112, and utilizing a precise bevel and arc surface transition structure design, the accuracy and consistency of the bending angle are ensured, and the appearance quality and accuracy of the bending angle size of the molded product are improved; the mold is particularly suitable for small-batch production because it reduces the mold cost shared due to large-scale production, thereby reducing the mold cost borne by each sheet metal part and improving economic benefits.

[0033] See also Figure 3 In this embodiment, it is further proposed that in order to improve processing efficiency and positioning accuracy, two bending stations are provided, and the two bending stations can perform processing at the same time, so that more bending operations can be completed in the same time, which significantly improves processing efficiency. The workpiece does not need to wait for bending to be completed at a single station, and can be quickly transferred to another station for processing, thereby reducing waiting time during the processing. Each bending station is provided with two sets of side limiters 24, and the two sets of side limiters 24 are divided into the front and rear positions corresponding to the bending insert 21; in this way, the workpiece can be fixed from both sides, thereby enhancing the stability of the workpiece during the bending process and reducing processing errors caused by movement or offset of the workpiece. The side limiters 24 at the front and rear positions can more accurately control the position of the workpiece and ensure accurate alignment during bending, which is particularly important when performing bending of complex shapes or high-precision requirements.

[0034] See also Figure 5In this embodiment, the angle between the third and fourth bevels 111 and 112 is further specified to be 89 degrees. During sheet metal bending, the elastic deformation of the material can lead to springback, whereby the bent part partially returns to its original state, affecting bending accuracy. By setting the angle between the third and fourth bevels 111 and 112 to 89 degrees, rather than the standard 90 degrees, the springback effect can be mitigated to a certain extent. This slight angular difference provides additional pressure, bringing the material closer to the desired 90-degree angle after bending.

[0035] See also Figure 1-2 In this embodiment, it is further proposed that the upper mold body 10 includes an upper mold fixing plate 12, a mold handle 13 installed on the upper mold fixing plate 12, an upper pad 14 installed at the lower end of the upper mold fixing plate 12, and an upper clamping plate 15 installed at the lower end of the upper pad 14, and the punch 11 is fixed to the lower end of the upper mold fixing plate 12 through the upper clamping plate 15; the lower mold body 20 includes a lower mold fixing plate 25, a lower pad 26 installed on the lower mold fixing plate 25, and an inlay plate 27 installed on the lower pad 26, and the bending insert 21, the front end limit member 22, the rear end limit member 23 and the side limit member 24 are all arranged on the inlay plate 27; the upper mold fixing plate 12 and the lower mold fixing plate 25 are also respectively connected to the limiting columns 30, and the mold closing between the upper mold fixing plate 12 and the lower mold fixing plate 25 is limited by the limiting columns 30. During the stamping process, the punch 11 is subjected to a huge impact force, and the upper pad 14 can effectively disperse these impact forces, preventing the upper die fixing plate 12 from being deformed or damaged due to excessive local force, thereby extending the service life of the various components of the upper die body 10; during the workpiece bending process, when subjected to the pressure from the punch 11 and the reaction force generated by the deformation of the workpiece, the lower pad 26 can evenly disperse these forces, preventing the lower die fixing plate 25 from being deformed due to uneven force, thereby ensuring the structural integrity of the lower die body 20; and the upper The mold fixing plate 12 and the lower mold fixing plate 25 are respectively connected to the limiting columns 30, which are used to limit the upper mold body 10 and the lower mold body 20 during the mold closing process. This design ensures that the upper mold body 10 and the lower mold body 20 can be accurately aligned each time the mold is closed, so that the punch 11 and the bending insert 21 and other key stamping and bending components can be accurately matched, ensuring the consistency and accuracy of each stamping and bending operation, effectively avoiding quality problems such as poor bending of the workpiece and dimensional deviation caused by inaccurate mold closing, and playing a key role in improving the quality of the molded products.

[0036] See also Figure 2-4, in this embodiment, it is further proposed that the front end of the mosaic panel 27 is provided with an extended section 40, and the front end limiting member 22 is arranged on the extended section 40; a C-shaped block 41 is embedded on the extended section 40, and the inner side of the C-shaped block 41 is a slide rail structure, so that the front end limiting member 22 is slidably connected to the inner side of the C-shaped block 41, and spring connection blocks 42 are connected to both the inner end position of the C-shaped block 41 and the front end limiting member 22, a tension spring 43 is connected between the two spring connection blocks 42, and limiting blocks 44 are extended on the opposite surfaces of the two spring connection blocks 42. The extended section 40 provided at the front end of the mosaic panel 27 and the structure of the front end limiting member 22 slidably connected thereto provide a more flexible adjustment method for the front end positioning of the workpiece, so that the operation can be carried out more quickly during the manual or automatic picking and placing of the to-be-processed sheet metal part; through the slide rail structure inside the C-shaped block 41, the front end limiting member 22 can be slid back and forth according to the size of different workpieces or the requirements of the bending process, and the tension spring 43 connected to the front end limiting member 22 at the inner end position of the C-shaped block 41 and the limiting blocks 44 extended on the opposite surfaces further enhance the stability of the front end limiting member 22 during the positioning process, so as to accurately adapt to the front end positioning requirements of various workpieces; this flexibility enables the mold to adapt to different specifications of sheet metal parts for bending processing without replacing the entire mold or carrying out large-scale modification of the mold, and only by adaptively adjusting the position of the front end limiting member 22 according to the different lengths of the to-be-processed sheet metal parts, greatly improving the adaptability of the mold to different workpieces, ensuring accurate positioning of the front end of the workpiece in various situations, and effectively reducing the bending error caused by inaccurate front end positioning.

[0037] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A stamping die that achieves a 90-degree bend in a single stamping, characterized in that: It includes an upper die body (10) and a lower die body (20) which are press-fitted with each other. A punch (11) is provided on the upper die body (10), and a bending station is provided on the lower die body (20). A bending insert (21) facing the lower part of the punch (11) is embedded at the bending station. Front-end limiters (22) and rear-end limiters (23) for resisting the two ends of the workpiece are respectively provided at the front and rear positions of the bending station on the lower die body (20), and side limiters (24) for resisting the two sides of the workpiece are provided at the left and right positions of the bending station on the lower die body (20). Among them, a bending groove (240) is formed on the bending insert (21). The bending groove (240) has a first inclined surface (241) and a second inclined surface (242) with an inclination angle of 45 degrees, and a groove bottom (243) with an arc-shaped transition structure is between the first inclined surface (241) and the second inclined surface (242). Chamfers (244) with an arc-shaped transition structure are respectively between the first inclined surface (241) and the second inclined surface (242) and the upper end surface of the bending insert (21). The lower end of the punch (11) has a third inclined surface (111) and a fourth inclined surface (112) matching the first inclined surface (241) and the second inclined surface (242), and a fillet (113) with an arc-shaped transition is between the third inclined surface (111) and the fourth inclined surface (112).

2. A stamping die capable of achieving a 90-degree bend in a single stamping according to claim 1, characterized in that: The upper die body (10) includes an upper die fixing plate (12), a die handle (13) installed on the upper die fixing plate (12), an upper cushion plate (14) installed at the lower end of the upper die fixing plate (12), and an upper clamping plate (15) installed at the lower end of the upper cushion plate (14). The punch (11) is fixed to the lower end of the upper die fixing plate (12) through the upper clamping plate (15).

3. A stamping die capable of achieving a 90-degree bend in a single stamping according to claim 2, characterized in that: The lower die body (20) includes a lower die fixing plate (25), a lower cushion plate (26) installed on the lower die fixing plate (25), and an embedding plate (27) installed on the lower cushion plate (26). The bending insert (21), the front-end limiter (22), the rear-end limiter (23) and the side limiter (24) are all provided on the embedding plate (27).

4. A stamping die capable of achieving a 90-degree bend in a single stamping according to claim 3, characterized in that: Limit columns (30) are respectively connected to the upper die fixing plate (12) and the lower die fixing plate (25). The mold closing between the upper die fixing plate (12) and the lower die fixing plate (25) is limited by the limit columns (30).

5. The stamping die capable of achieving a 90-degree bend in a single stamping according to claim 1, characterized in that: The included angle between the third inclined surface (111) and the fourth inclined surface (112) is 89 degrees.

6. A stamping die capable of achieving a 90-degree bend in a single stamping according to claim 3, characterized in that: The front end of the embedding plate (27) is provided with an extended section (40), and the front-end limiter (22) is provided on the extended section (40).

7. A stamping die capable of achieving a 90-degree bend in a single stamping according to claim 6, characterized in that: A U-shaped block (41) is embedded on the extended section (40). The inner side of the U-shaped block (41) is a slide rail structure, so that the front-end limiter (22) is slidably connected to the inner side of the U-shaped block (41). Spring connecting blocks (42) are connected to the inner end position of the inner side of the U-shaped block (41) and the front-end limiter (22). A tension spring (43) is connected between the two spring connecting blocks (42), and limit blocks (44) are respectively extended on the opposite surfaces of the two spring connecting blocks (42).

8. The stamping die capable of achieving a 90-degree bend in a single stamping according to claim 1, characterized in that: Two bending stations are provided, and each bending station is correspondingly provided with two sets of side limiters (24), and the two sets of side limiters (24) are respectively located at the front and rear positions corresponding to the bending insert (21).

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