Bending device for hollow core part

Abstract

The utility model belongs to the technical field of forming, and provides a bending device for a hollow core part, which comprises a fixed die plate, a fixed die plate, a bending die plate, a bending die plate, a bending die plate, a bending die plate and a bending die plate, and is characterized in that the fixed die plate is provided with a positioning part and an anti-deformation part; the anti-deformation piece is positioned on one side of the positioning piece and is movably inserted into the hollow core piece on the positioning piece; and the first forming sliding block and the second forming sliding block are movably arranged on the fixed mold plate. Compared with the prior art, the bending device has the advantages that the anti-deformation block is used for avoiding the micro-deformation phenomenon when a product is bent, the hollow core piece is pressed tightly through the pressing block, the forming sliding block can stably form the first bending part, and the height difference between the bending sliding block and the pressing block is small in size. The bending sliding block can achieve forming operation of the second bending part on the hollow part after being pressed by the pressing block, the overall structure is simple, the defects that after the bending structure of a hollow product is formed, the thickness of the product is reduced, stress remains, springback is unstable and the like are overcome, and the bending forming quality and the production efficiency of the hollow part are improved.

Description

Technical Field

[0001] The utility model belongs to the field of forming technology, and particularly relates to a bending device for hollow parts. Background Art

[0002] With the rapid development of technology, people have higher and higher requirements for the quality of products after forming, which also makes the stability of the product forming process determine the final quality of the product.

[0003] Roll bending is a common metal sheet or profile forming process. However, after bending products with hollow cavities using traditional cold roll bending technology, there are usually problems such as appearance depressions. Moreover, bending with supports such as nylon urethane glue often has disadvantages such as short service life and high cost. As a result, after the bending structure of hollow products is formed, defects such as reduction in product thickness, stress residue, and unstable springback are likely to occur. Not only is the forming step relatively complex, but it also seriously affects the quality and production efficiency of the products. Summary of the Utility Model

[0004] Aiming at the above deficiencies existing in the prior art, the technical problem to be solved by the utility model is to propose a bending device for hollow parts.

[0005] The technical solution adopted by the utility model to solve its technical problem is to propose a bending device for hollow parts. The hollow part is arranged in a long strip shape, and is used to form a first bending part on both sides in the length direction of the hollow part, and a second bending part connected to the first bending part is formed at the top of the hollow part. The bending device includes: a fixed template, which is provided with a positioning member and an anti-deformation member. The positioning member is used to limit the hollow part to be bent; the anti-deformation member is located on one side of the positioning member and is movably inserted into the hollow part placed on the positioning member;

[0006] A first forming slider and a second forming slider are movably arranged on the fixed template and are located on both sides in the length direction of the hollow part. When the first forming slider and the second forming slider approach each other, they can movably press against both sides in the length direction of the hollow part to form the required first bending part;

[0007] A moving die mechanism is movably arranged above the fixed template. A driving block, a pressing block, and a bending slider are connected to the moving die mechanism. The driving block movably presses against the first forming slider and the second forming slider; the pressing block movably presses on the hollow part to limit the displacement of the hollow part; there is a height difference between the bending slider and the pressing block, and the bending slider movably presses on the top of the hollow part to form the required second bending part;

[0008] When the moving die mechanism approaches the fixed template, the blank holder can be pressed against the hollow part, allowing the driving block to drive the first forming slider and the second forming slider to approach each other to form the first bending part; and when the moving die mechanism is fully pressed against the fixed template, the bending slider presses the hollow part to form the second bending part.

[0009] In the above-mentioned bending device for a hollow part, both ends of the first forming slider and the second forming slider are formed with a supporting part and a bending part. The supporting parts can simultaneously press against the bottom wall and the side wall of the hollow part when the first forming slider and the second forming slider approach each other, so that the bending part located above the supporting part forms the first bending part on the hollow part.

[0010] In the above-mentioned bending device for a hollow part, a T-shaped block is detachably connected inside the bending slider. The bottom of the T-shaped block is formed with a pressing part and a forming part. The pressing part is used to movably extend into and press the hollow part; the forming part is located on one side of the pressing part to form the second bending part on the hollow part.

[0011] In the above-mentioned bending device for a hollow part, a guiding block is arranged on the fixed template. Guiding grooves are formed at the bottoms of the first forming slider and the second forming slider. The guiding grooves are movably clamped with the guiding block, so that the supporting parts press against the hollow part.

[0012] In the above-mentioned bending device for a hollow part, the moving die mechanism further includes:

[0013] A moving template, which is movably arranged above the fixed template. The driving block and the bending slider are both detachably connected to the moving template;

[0014] A fixing plate, which is connected to the side of the moving template close to the fixed template. A buffer spring is installed on the fixing plate. A connecting hole is provided on the blank holder. The buffer spring extends into the connecting hole and is connected to the blank holder.

[0015] In the above-mentioned bending device for a hollow part, a limiting block is further arranged on the fixed template. Elastic members that are movably pressed against the positioning member are arranged on both the first forming slider and the second forming slider;

[0016] The first forming slider or the second forming slider can be separated from the positioning member due to the elastic reset of the elastic member, and the limiting block prevents the first forming slider or the second forming slider from disengaging from the guiding groove.

[0017] In the above-mentioned bending device for a hollow member, a first limit post is further provided on the moving template, a second limit post is provided on the fixed template, and the first limit post can be movably abutted against the second limit post when the moving template and the fixed template approach each other.

[0018] In the above-mentioned bending device for a hollow member, a first guiding seat is further provided on the moving template, a second guiding seat is provided on the fixed template, a guiding hole is formed in the first guiding seat, a guiding post is provided on the second guiding seat, and the guiding post is movably inserted into the guiding hole.

[0019] In the above-mentioned bending device for a hollow member, the positioning member includes:

[0020] A profiling block, which is provided on the fixed template and is used to fix the parts of the hollow member to be formed into the first bending part and the second bending part;

[0021] An extension plate, which is provided on the fixed template, and an extension block located at the end of the profiling block is provided on the extension plate, and is used to support the part of the hollow member extending outside the fixed template;

[0022] A pressing block movably hinged to the driving end of the cylinder, and the pressing block is used to movably press the hollow member against the extension block.

[0023] In the above-mentioned bending device for a hollow member, the anti-deformation member includes:

[0024] A fixed seat, which is provided on the fixed template, and a rotating shaft is arranged in the fixed seat;

[0025] A rotating block, which is connected to the rotating shaft, and an anti-deformation block is connected to the rotating block. The anti-deformation block can movably extend into the hollow member when the rotating block rotates relative to the fixed seat.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] (1)The bending device for hollow parts of the present utility model uses an anti-deformation block that is movably inserted into the cavity of the hollow part during positioning to avoid micro-deformation during product bending. At the same time, as the moving template and the fixed template approach each other, the hollow part is further pressed by the pressure block, which is beneficial for the driving block to drive the first forming slider and the second forming slider to approach each other stably to form the first bending part. Meanwhile, by utilizing the height difference between the bending slider and the pressure block, the bending slider can follow the pressure block to complete the forming operation of the second bending part on the hollow part after being pressed. The overall structure is simple, effectively avoiding defects such as product thickness reduction, stress residue, and unstable springback after the bending structure of the hollow product is formed. While improving the bending forming quality of the hollow part, it also directly realizes the forming actions of the first bending part and the second bending part through a single mold closing action of the moving die mechanism and the fixed template, greatly improving the production efficiency of the product.

[0028] (2)Both the first forming slider and the second forming slider can be guided by the guiding block to stably abut against the profiling block and form the first bending part, playing a certain guiding and limiting role. At the same time, by utilizing the elastic function of the elastic part, while automatically resetting the first forming slider and the second forming slider after forming the hollow part, the stability during the reset process is effectively ensured by the limiting block.

[0029] (3)By inserting the guiding column movably into the guiding hole, it is ensured that the pressure block can accurately press the hollow part against the profiling block, thereby providing guarantee for the smoothness and stability during the subsequent forming of the first bending part and the second bending part. Description of the Drawings

[0030] Figure 1 is a schematic diagram of the state when the fixed template and the moving template of the present application are abutted;

[0031] Figure 2 is a schematic diagram of the installation structure of the pressure block and the driving block on the moving template;

[0032] Figure 3 is a schematic diagram of the installation structure of the first forming slider, the second forming slider, and the positioning part and the anti-deformation part on the fixed template;

[0033] Figure 4 is a schematic diagram of the structure when the pressure block presses the hollow part against the profiling block and the first forming slider forms;

[0034] Figure 5 is a three-dimensional view of the anti-deformation part;

[0035] Figure 6 is an exploded view of the bending slider, the hollow part, and the anti-deformation block.

[0036] In the figure, 1 is a hollow member; 10 is a first bending portion; 11 is a second bending portion;

[0037] 2 is a fixed template; 20 is a guide block; 21 is a limit block; 22 is a second limit post; 23 is a second guide seat; 230 is a guide post;

[0038] 3 is a positioning member; 30 is a profiling block; 31 is an extension plate; 310 is an extension block; 32 is a pressing block;

[0039] 4 is an anti-deformation member; 40 is a fixed seat; 41 is a rotating shaft; 42 is a rotating block; 43 is an anti-deformation block;

[0040] 50 is a first forming slider; 51 is a second forming slider; 520 is a supporting portion; 521 is a bending portion; 522 is a guide groove; 523 is a guiding inclined surface;

[0041] 6 is a moving die mechanism; 60 is a driving block; 61 is a blank holding block; 610 is a connecting hole; 62 is a bending slider; 620 is a T-shaped block; 620a is a pressing portion; 620b is a forming portion; 63 is a moving template; 630 is a first limit post; 64 is a fixing plate; 640 is a buffer spring; 65 is a first guide seat; 650 is a guide hole. Detailed implementation mode

[0042] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0043] Such as Figures 1 to 6As shown in the figure, the utility model relates to a bending device for a hollow part 1. The hollow part 1 is arranged in a long strip shape, and is used to form a first bending part 10 on both sides of the hollow part 1 in the length direction, and a second bending part 11 connected to the first bending part 10 is formed at the top end of the hollow part 1. The bending device includes: a fixed template 2, which is provided with a positioning member 3 and an anti-deformation member 4. The positioning member 3 is used to limit the hollow part 1 to be bent; the anti-deformation member 4 is located on one side of the positioning member 3 and is movably inserted into the hollow part 1 placed on the positioning member 3; a first forming slider 50 and a second forming slider 51 are movably arranged on the fixed template 2 and are located on both sides of the hollow part 1 in the length direction. When the first forming slider 50 and the second forming slider 51 approach each other, they can movably abut against both sides of the hollow part 1 in the length direction to form the required first bending part 10; a moving die mechanism 6 is movably arranged above the fixed template 2. A driving block 60, a pressing block 61 and a bending slider 62 are connected to the moving die mechanism 6. The driving block 60 movably abuts against the first forming slider 50 and the second forming slider 51; the pressing block 61 movably presses on the hollow part 1 to limit the displacement of the hollow part 1; there is a height difference between the bending slider 62 and the pressing block 61, and the bending slider 62 movably presses on the top end of the hollow part 1 to form the required second bending part 11; the pressing block 61 can be pressed on the hollow part 1 when the moving die mechanism 6 approaches the fixed template 2, and the driving block 60 is allowed to drive the first forming slider 50 and the second forming slider 51 to approach each other to form the first bending part 10; and when the moving die mechanism 6 is completely abutted against the fixed template 2, the bending slider 62 presses on the hollow part 1 and forms the second bending part 11.

[0044] This solution is mainly to form the first bending part 10 and the second bending part 11 on the hollow part 1 with a hollow cavity. Specifically, as Figures 1 to 6 shown, before the hollow part 1 to be formed is placed on the positioning member 3 for fixation, the anti-deformation block 43 is movably inserted into the hollow cavity of the hollow part 1 to ensure that no concave deformation occurs during the subsequent forming process; after the hollow part 1 is fixed, the moving die mechanism 6 can drive the driving block 60, the pressing block 61 and the bending slider 62 to approach the fixed template 2 synchronously. During this process, when the moving die mechanism 6 moves down by half of the stroke, the pressing block 61 can pre-contact and press on the hollow part 1, thereby providing a guarantee for the subsequent upcoming forming action. As the moving die mechanism 6 continues to move down to three-quarters of the stroke, at this time, the driving block 60 starts to push the first forming slider 50 and the second forming slider 51 to approach each other. Then, while abutting against the positioning member 3, the lateral bending of the hollow part in the X direction (that is, horizontally perpendicular to the length direction of the hollow part 1) is realized to form the required first bending part 10. Finally, when the moving die mechanism 6 moves down to the bottom (that is, in the state of being movably abutted against the fixed template 2, as Figure 1As shown in the figure, relying on the height difference between the bending slider 62 and the blank holder 61, when the blank holder 61 presses the hollow part 1, the bending slider 62 does not apply the forming pressure to the hollow part 1 immediately. Instead, after the first bending part 10 is formed, the bending slider 62 begins to form the second bending part 11 on the hollow part 1. It can be seen that the overall structure of this bending device is relatively simple. It not only effectively avoids the phenomenon of surface depression caused by the reduction of product thickness after the bending structure of the hollow product is formed, but also prevents the occurrence of defects such as stress residue and unstable springback. While improving the bending forming quality of the hollow part 1, the first bending part 10 and the second bending part 11 are directly formed through one mold closing action of the moving die mechanism 6 and the fixed template 2, greatly improving the production efficiency of the product.

[0045] Support parts 520 and bending parts 521 are formed at the ends of the first forming slider 50 and the second forming slider 51. The support parts 520 can simultaneously abut against the bottom wall and the side wall of the hollow part 1 when the first forming slider 50 and the second forming slider 51 approach each other, so that the bending parts 521 located above the support parts 520 can form the first bending part 10 on the hollow part 1.

[0046] As Figure 3 And Figure 4 As shown in the figure, both the first forming slider 50 and the second forming slider 51 are composed of a support part 520 and a bending part 521. Among them, the support part 520 is arranged in an arc-shaped L shape, so that when the first forming slider 50 or the second forming slider 51 approaches each other, the support part 520 can effectively support and limit the outer side wall and the bottom wall of the hollow part 1 at the same time, and then assist the bending part 521 located above the support part 520 to complete the forming action of the first bending part 10 along the X direction (that is, the horizontal direction perpendicular to the length direction of the hollow part 1), improving the fluency and stability in the forming process.

[0047] Preferably, two driving blocks 60 are provided in this solution to adapt to driving different first forming sliders 50 or second forming sliders 51. At the same time, guiding inclined surfaces 523 are provided at the tops of the first forming slider 50 and the second forming slider 51 away from the positioning part 3. As the driving block 60 gradually approaches the fixed template 2 along with the moving die mechanism 6, the driving block 60 can be pre-actively abutted against the guiding inclined surface 523 to guide the first forming slider 50 and the second forming slider 51 to approach each other, and finally complete the forming process of the first bending part 10 on the hollow part 1.

[0048] Guiding blocks 20 are provided on the fixed template 2. Guiding grooves 522 are formed at the bottoms of the first forming slider 50 and the second forming slider 51. The guiding grooves 522 are movably clamped with the guiding blocks 20 to allow the support parts 520 to abut against the hollow part 1.

[0049] Furthermore, asFigure 3 As shown in Figure 4 Figure 4 , the length direction of the guiding block 20 is the direction in which the first forming slider 50 and the second forming slider 51 form the first bending portion 10 on the hollow member 1. Therefore, relying on the cooperation of the guiding groove 522 and the guiding block 20 for movable clamping, it helps to guide and limit the relative movement of the first forming slider 50 or the second forming slider 51 on the fixed template 2. Similarly, on both side walls of the first forming slider 50 and the second forming slider 51, the cooperation mode of the guiding block 20 and the guiding groove 522 for movable clamping can also be used to further ensure that the forming slider does not tilt during the reciprocating movement.

[0050] The fixed template 2 is further provided with a limiting block 21, and elastic members are provided on both the first forming slider 50 and the second forming slider 51 and are movably abutted against the positioning member 3; the first forming slider 50 or the second forming slider 51 can be away from the positioning member 3 due to the elastic reset of the elastic member, and the limiting block 21 prevents the first forming slider 50 or the second forming slider 51 from disengaging from the guiding groove 522.

[0051] As Figure 1 shown in Figure 3 Figure 3 , when the driving block 60 drives the first forming slider 50 and the second forming slider 51 to approach each other and the first bending portion 10 on the hollow member 1 is formed, at this time, the elastic member (not shown in the figure) between the forming slider and the positioning member 3 is compressed, and the driving block 60 is also between the limiting block 21 and the first forming slider 50 or the second forming slider 51. Reference can be made to Figure 1 Figure 1 for the state shown to ensure the stability of the bending portion 521 when forming the first bending portion 10 on the hollow member 1; when the moving die mechanism 6 drives the driving block 60 away from the fixed template 2, since there is no extrusion force of the driving block 60 on the forming slider, the first forming slider 50 and the second forming slider 51 can rely on the elastic reset of the elastic member to move away from the positioning member 3 along the length direction of the guiding block 20 to avoid damage to the formed hollow member 1 during the blanking process. It should be noted that at this time, the limiting block 21 can limit the moving distance of the first forming slider 50 or the second forming slider 51 on the guiding block 20, effectively preventing the forming slider from disengaging from the guiding block 20 and affecting the smoothness and stability of the subsequent forming process of other hollow member 1 products.

[0052] The moving die mechanism 6 further includes: a moving template 63, which is movably arranged above the fixed template 2, and both the driving block 60 and the bending slider 62 are detachably connected to the moving template 63; a fixing plate 64, which is connected to the side of the moving template 63 close to the fixed template 2. A buffer spring 640 is installed on the fixing plate 64, and a connecting hole 610 is provided on the pressing block 61. The buffer spring 640 extends into the connecting hole 610 and is connected to the pressing block 61.

[0053] As Figure 1 , Figure 2 and Figure 6 shown, the above-mentioned driving block 60, pressure block 61 and bending slider 62 are all installed at the bottom of the moving template 63 in a detachable connection manner, so as to facilitate subsequent maintenance and replacement. Regarding the pressing and fixing of the hollow part 1 by the pressure block 61, a fixing plate 64 is also provided on the moving template 63. By using the buffer spring 640 between the fixing plate 64 and the pressure block 61, when the pressure block 61 presses the hollow part 1 movably, a certain buffering effect can be achieved through the buffer spring 640, avoiding the phenomenon that the pressure block 61 rigidly presses the hollow part 1 and causing the depression and deformation of the hollow part 1, or even scrapping.

[0054] Preferably, the buffer spring 640 can also be installed on the fixed template 2, so that the moving template 63 and the fixed template 2 can achieve a certain buffering and shock-absorbing effect through the buffer spring 640 during the mold closing action.

[0055] A T-shaped block 620 is detachably connected inside the bending slider 62. A pressing part 620a and a forming part 620b are formed at the bottom of the T-shaped block 620. The pressing part 620a is used to movably extend into and press the hollow part 1; the forming part 620b is located on one side of the pressing part 620a to form a second bending part 11 on the hollow part 1.

[0056] Specifically, as Figure 2 and Figure 6 shown, the T-shaped block 620 cooperates with the T-shaped groove in the bending slider 62 to realize the detachable connection between the bending slider 62 and the T-shaped block 620, which helps to replace the T-shaped block 620 in time when it is worn or scrapped, and provides guarantee for the stability of the T-shaped block 620 to form the second bending part 11 on the hollow part 1. In addition, the pressing part 620a and the forming part 620b are provided at the bottom of the T-shaped block 620. During the process of forming the second bending part 11, the bending slider 62 can gradually approach the fixed template 2, and then press the pressing part 620a on the T-shaped block 620 against the hollow part 1, providing guarantee for both the stability of the forming action of the second bending part 11 and the forming quality. At the same time, the forming part 620b also presses against the hollow part 1 movably. It should be noted that the forming part 620b is also arranged in an arc-shaped L shape to ensure that it will not affect the quality of the hollow part 1 while forming the second bending part 11. Therefore, the forming connection of the T-shaped block 620 to the second bending part 11 can be directly realized through one mold closing action of the moving template 63 and the fixed template 2 after the above-mentioned bending part 521 forms the first bending part 10, which not only ensures the quality of the formed product, but also greatly improves the production efficiency of the product.

[0057] Furthermore, as Figures 1 to 3As shown in the figure, a first limit post 630 is further provided on the movable template 63 of the present solution, and a second limit post 22 is provided on the fixed template 2. When the movable template 63 and the fixed template 2 gradually approach each other, the first limit post 630 can be movably abutted against the second limit post 22. Through this structure, the moving distances of the blank holder 61, the bending slider 62 and the driving block 60 relative to the fixed template 2 are effectively limited, ensuring that the forming processes of the first bending portion 10 and the second bending portion 11 are stably realized within the limited range, thereby improving the stability of the bending device during operation.

[0058] A first guide seat 65 is further provided on the movable template 63, and a second guide seat 23 is provided on the fixed template 2. A guide hole 650 is formed in the first guide seat 65, and a guide post 230 is provided on the second guide seat 23. The guide post 230 is movably inserted into the guide hole 650.

[0059] Continue to refer to Figures 1 to 3 , when the movable template 63 and the fixed template 2 approach each other, the guide post 230 can be movably inserted into the guide hole 650, thereby playing a guiding and limiting effect when the movable template 63 and the fixed template 2 are clamped. Ensure that the above-mentioned blank holder 61, bending slider 62 and driving block 60 can all realize corresponding functions. In addition to improving the stability of the product bending operation, it also provides a guarantee for the quality of the hollow part 1 after bending forming.

[0060] The positioning member 3 includes: a profiling block 30 provided on the fixed template 2, and the profiling block 30 is used to fix the parts of the hollow part 1 where the first bending portion 10 and the second bending portion 11 are to be formed; an extension plate 31 provided on the fixed template 2, and an extension block 310 located at the end of the profiling block 30 is provided on the extension plate 31 for supporting the part of the hollow part 1 extending out of the fixed template 2; a pressing block 32 movably hinged to the driving end of the cylinder, and the pressing block 32 is used to movably press the hollow part 1 against the extension block 310.

[0061] In this embodiment, as Figure 3 and Figure 4 shown, since the hollow part 1 to be formed is arranged in a long strip shape, in addition to using the profiling block 30 to ensure the stability of the parts of the hollow part 1 to be welded, the extension block 310 on the extension plate 31 can also effectively support the other parts of the hollow part 1. After the profiling block 30 and the extension block 310 position the whole hollow part 1, the pressing block 32 connected to the cylinder can press the part of the hollow part 1 extending out of the fixed template 2 to prevent the displacement or vibration of the hollow part 1 during the bending operation of the bending device from affecting the quality of the final product forming.

[0062] The anti-deformation member 4 includes: a fixed seat 40 disposed on the fixed template 2, and a rotating shaft 41 is disposed inside the fixed seat 40; a rotating block 42 is connected to the rotating shaft 41, and an anti-deformation block 43 is connected to the rotating block 42. When the anti-deformation block 43 rotates relative to the fixed seat 40, the anti-deformation block 43 can movably extend into the hollow member 1.

[0063] As Figure 5 shown in connection with Figure 6 the fixing of the hollow member 1, in this solution, a fixed seat 40 is provided at the end position of the hollow member 1 on the fixed template 2. When it is necessary to fix the hollow member 1 to be bent, the anti-deformation block 43 can rotate relative to the fixed seat 40 through the rotating shaft 41 to above the profiling block 30. As the anti-deformation block 43 is movably inserted into the hollow cavity of the hollow member 1, while playing a limiting function on the hollow member 1, it effectively prevents the surface of the hollow member 1 from being sunken when forming the first bending portion 10 or the second bending portion 11, providing a guarantee that the quality of the formed product can meet the usage requirements of customers.

[0064] Preferably, in this solution, the anti-deformation block 43 uses the flexibility of a rigid iron-based substrate to support the hollow cavity of the hollow member 1, thereby achieving the extension of the service life and preventing the phenomenon of product surface depression during the forming process.

[0065] It should be noted that the elastic member in this solution can be replaced by other elastic devices such as a compression spring or a return spring.

[0066] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0067] In addition, in the present invention, descriptions such as "first", "second", "one" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0068] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0069] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

Claims

1. A bending device for a hollow member, wherein the hollow member is arranged in a long strip shape, and is used to form a first bending portion on both sides of the hollow member in the length direction, and to form a second bending portion connected to the first bending portion at the top end of the hollow member, characterized in that: The bending device comprises: The fixed template is provided with a positioning member and an anti-deformation member, wherein the positioning member is used to limit the hollow member to be bent; the anti-deformation member is located on one side of the positioning member and is movably inserted into the hollow member placed on the positioning member; A first forming slider and a second forming slider are movably arranged on the fixed template and located at two sides of the length direction of the hollow member. When the first forming slider and the second forming slider are approached to each other, they can be movably pressed against two sides of the length direction of the hollow member to form a desired first curved portion. A movable mold mechanism is movably arranged above the fixed mold plate, and is connected to a driving block, a pressing block, and a bending slider, wherein the driving block movably presses against the first forming slider and the second forming slider; the pressing block movably presses against the hollow member to limit the displacement of the hollow member; the bending slider has a height difference with the pressing block, and movably presses against the top end of the hollow member to form the required second curved portion; The pressing block can be pressed against the hollow part when the movable mold mechanism approaches the fixed mold plate, allowing the driving block to drive the first forming slider and the second forming slider to approach each other to form the first curved portion; and when the movable mold mechanism is completely pressed against the fixed mold plate, the bending slider presses the hollow part and forms the second curved portion.

2. A bending device for hollow parts according to claim 1, characterized in that: A supporting portion and a bending portion are formed at the ends of the first molding slider and the second molding slider. The supporting portion can be pressed against the bottom wall and the side wall of the hollow part at the same time when the first molding slider and the second molding slider approach each other, so that the bending portion located above the supporting portion can form the first curved portion on the hollow part.

3. A bending device for hollow parts according to claim 1, characterized in that: A T-block is detachably connected to the bending slider, and a clamping portion and a forming portion are formed at the bottom of the T-block. The clamping portion is used to movably extend into and clamp the hollow member; the forming portion is located on one side of the clamping portion to form the second curved portion on the hollow member.

4. A bending device for hollow parts according to claim 2, characterized in that: The fixed template is provided with a guide block, and the bottoms of the first forming slide block and the second forming slide block are both formed with a guide groove, and the guide groove is movably engaged with the guide block so that the support portion is pressed against the hollow member.

5. A bending device for hollow parts according to claim 2, characterized in that: The movable mold mechanism also includes: A movable platen is movably arranged above the fixed platen, and the driving block and the bending slide block are both detachably connected to the movable platen; A fixed plate is connected to a side of the movable plate close to the fixed plate, a buffer spring is installed on the fixed plate, a connecting hole is provided on the pressing block, and the buffer spring extends into the connecting hole and is connected to the pressing block.

6. A bending device for hollow parts according to claim 4, characterized in that: The fixed template is also provided with a limit block, and the first forming slide block and the second forming slide block are both provided with an elastic member that is movably pressed against the positioning member; The first molding slider or the second molding slider can be moved away from the positioning member due to the elastic resetting of the elastic member, and the limiting block prevents the first molding slider or the second molding slider from being separated from the guide groove.

7. A bending device for hollow parts according to claim 5, characterized in that: The movable template is also provided with a first limiting column, and the fixed template is provided with a second limiting column. The first limiting column can be movably pressed against the second limiting column when the movable template and the fixed template approach each other.

8. A bending device for hollow parts according to claim 5, characterized in that: The movable template is also provided with a first guide seat, the fixed template is provided with a second guide seat, a guide hole is formed in the first guide seat, the second guide seat is provided with a guide column, and the guide column is movably inserted in the guide hole.

9. A bending device for hollow parts according to claim 1, characterized in that: The positioning member comprises: A profiling block, arranged on the fixed template, and used to fix the portion of the hollow member where the first curved portion and the second curved portion are to be formed; An extension plate is arranged on the fixed template, and an extension block is arranged on the extension plate at the end of the profiling block, and is used to support the portion of the hollow member extending out of the fixed template; A pressing block is movably hinged on the driving end of the cylinder, and the pressing block is used to movably press the hollow member onto the extension block.

10. A bending device for hollow parts according to claim 1, characterized in that: The anti-deformation member comprises: A fixed seat, arranged on the fixed template, wherein a rotating shaft is arranged in the fixed seat; A rotating block is connected to the rotating shaft, and an anti-deformation block is connected to the rotating block. The anti-deformation block can be movably extended into the hollow part when the rotating block rotates relative to the fixed seat.

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