Anti-collision beam bending method, bending equipment and vehicle

Abstract

The invention provides a bending method and bending equipment for an anti-collision beam and a vehicle. The bending method comprises the steps that a core rod is connected to a bending machine; the anti-collision beam is moved, and the core rod is inserted into a cavity of the anti-collision beam; after the anti-collision beam moves to a preset position, the anti-collision beam is clamped and fixed; after the anti-collision beam is fixed, a to-be-bent part of the anti-collision beam is heated; after the bent part is heated to a preset temperature, the bending machine is driven to bend the anti-collision beam; and after the anti-collision beam is bent and formed, the anti-collision beam and the core rod are taken down. According to the bending method, the to-be-bent part is subjected to heating treatment, so that the surface hardness of the to-be-bent part is reduced, the plasticity of the to-be-bent part is improved, bending treatment of the anti-collision beam is achieved at a time, repeated bending treatment is not needed, the bending forming time of the anti-collision beam is shortened, and the torque needed for bending forming is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-collision beam processing, and in particular to a method for bending an anti-collision beam, a bending device, and a vehicle. Background Art

[0002] With the increase in the number of domestic cars, the country's requirements for lightweight and collision safety are increasing. As a strong barrier to automobile safety, the anti-collision beam needs to undergo a bending process to bend both sides of the tube beam after forming to adapt to the shape characteristics of the front of the car body. In order to make the anti-collision beam fit better with the car body, it is necessary to ensure that there are as few wrinkle defects as possible on the inner and outer surfaces after bending.

[0003] Currently, most automobiles use tubular steel anti-collision beams that have been roll-bent, stretch-bent, or press-bent. These beams are typically bent using a core rod, a positioning cavity, clamping blocks, and a stretch-bending machine. While the profile is being bent and deformed, a tangential tensile force is applied to both ends of the profile to change the stress distribution within the profile, making it more uniform and consistent, thereby reducing springback and improving profile forming accuracy. While the aforementioned tooling equipment is easy to design, assemble, and operate, and improves the surface quality of the formed parts, the actual bending process requires a large amount of equipment and requires repeated repetition of the same action to achieve the desired bend angle.

[0004] To address the above-mentioned problems, no effective solutions have been proposed so far. Summary of the Invention

[0005] The main purpose of the present invention is to provide a method, equipment and vehicle for bending an anti-collision beam, so as to solve the technical problems that the anti-collision beam bending forming process is time-consuming and requires a large bending torque.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a method for bending an anti-collision beam is provided, comprising the following steps: connecting a core rod to a bending machine; moving the anti-collision beam so that the core rod is inserted into the cavity of the anti-collision beam; after the anti-collision beam is moved to a preset position, clamping and fixing the anti-collision beam; after the anti-collision beam is fixed, heating the portion of the anti-collision beam to be bent; after the portion to be bent is heated to a preset temperature, driving the bending machine to bend the anti-collision beam; after the anti-collision beam is bent and formed, removing the anti-collision beam and the core rod.

[0007] Furthermore, after the anti-collision beam is fixed, the part to be bent of the anti-collision beam is heated, including: heating the tensile side of the part to be bent to a first temperature, heating the compression side of the part to be bent to a second temperature, and heating the other side surfaces of the part to be bent to a third temperature, wherein the first temperature is greater than the third temperature, and the third temperature is greater than the second temperature.

[0008] Furthermore, the core rod is an integrated structure, and the core rod has a first supporting end that abuts against the part to be bent. During the bending process of the anti-collision beam, the first side surface of the first supporting end abuts against the tensile side of the part to be bent, and a spacing space is formed between the second side surface of the first supporting end and the compression side of the part to be bent, wherein the first side surface of the first supporting end and the second side surface of the first supporting end are arranged opposite to each other.

[0009] Furthermore, the first side surface of the first supporting end is processed into an arc-shaped surface.

[0010] Furthermore, the core rod is a spliced ​​structure, and during the bending process of the anti-collision beam, the core rod can be bent along the thickness direction of the core rod.

[0011] Furthermore, the core rod is made up of multiple splicing bodies, and the multiple splicing bodies are arranged in sequence along the length direction of the splicing body, and two adjacent splicing bodies are rotatably connected. During the bending process of the anti-collision beam, the first side surface of the splicing body abuts against the tensile side of the part to be bent, and the second side surface of the splicing body abuts against the compression side of the part to be bent, wherein the first side surface of the splicing body and the second side surface of the splicing body are arranged opposite to each other.

[0012] Furthermore, the first side surface of the splicing body is processed into a curved surface, and the second side surface of the splicing body is processed into a curved surface.

[0013] Furthermore, the anti-collision beam is moved so that the core rod is inserted into the cavity of the anti-collision beam, including: during the movement of the anti-collision beam, some of the multiple splicing bodies extend to the non-bending part of the anti-collision beam after passing through the to-be-bent part of the anti-collision beam.

[0014] According to another aspect of the present invention, a bending device for an anti-collision beam is provided, comprising: a bending machine; a mandrel rod, the mandrel rod being detachably connected to the bending machine; a feeding device, the feeding device being arranged along the axial direction of the mandrel rod, the feeding device being used to drive the anti-collision beam to move along the axial direction of the mandrel rod so that the mandrel rod is inserted into the cavity of the anti-collision beam; a clamping device, the clamping device being arranged along the axial direction of the mandrel rod, the clamping device being used to clamp and fix the anti-collision beam; a heating device, the heating device being arranged along the axial direction of the mandrel rod, the heating device being located between the clamping device and the bending machine, the heating device being used to heat the anti-collision beam.

[0015] According to another aspect of the present invention, a vehicle is provided. The vehicle includes an anti-collision beam, and the anti-collision beam is formed by bending using the above-mentioned bending method.

[0016] Applying the technical solution of the present invention, the non-bending portion of the anti-collision beam needs to be clamped and fixed, the portion to be bent of the anti-collision beam needs to be supported by a core rod, and the portion to be bent of the anti-collision beam needs to be heated before bending. The above bending method heats the portion to be bent to reduce the surface hardness of the portion to be bent and improve the plasticity of the portion to be bent, so that the anti-collision beam can be bent in one step without repeated bending processes, thereby reducing the time required for bending the anti-collision beam and reducing the torque required for bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 A schematic structural diagram of an embodiment of a bending device according to the present invention is shown;

[0019] Figure 2 A schematic diagram of the assembly of the integrated core rod and the anti-collision beam in the present invention is shown;

[0020] Figure 3 A schematic diagram of the assembly of the split core rod and the anti-collision beam in the present invention is shown;

[0021] Figure 4 A schematic structural diagram of a first embodiment of a split mandrel according to the present invention is shown;

[0022] Figure 5 A schematic structural diagram of a second embodiment of a split core rod in the present invention is shown.

[0023] The above drawings include the following reference numerals:

[0024] 1. Mandrel rod;

[0025] 11. Splice;

[0026] 12. Extension plate;

[0027] 13. Connecting plate;

[0028] 2. Bending machine;

[0029] 3. Anti-collision beam;

[0030] 31. Part to be bent;

[0031] 32. Non-bending parts;

[0032] 4. Feeding device;

[0033] 5. Clamping device;

[0034] 6. Heating device. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0039] Combine Figures 1 to 5 As shown, according to a specific embodiment of the present application, a method for bending the anti-collision beam 3 is provided.

[0040] Specifically, the bending method of the anti-collision beam 3 includes the following steps:

[0041] Step S1: Connect the mandrel rod 1 to the bending machine 2.

[0042] Step S2: moving the anti-collision beam 3 so that the core rod 1 is inserted into the cavity of the anti-collision beam 3 .

[0043] Specifically, the portion 31 to be bent of the anti-collision beam 3 moves close to the core rod 1 so that the core rod 1 is inserted into the portion 31 to be bent of the anti-collision beam 3 to avoid large cross-sectional deformation of the portion 31 to be bent during the bending process.

[0044] Step S3: After the anti-collision beam 3 moves to a preset position, the anti-collision beam 3 is clamped and fixed.

[0045] Specifically, after the anti-collision beam 3 moves to the preset position, the non-bending portion 32 of the anti-collision beam 3 needs to be clamped and fixed to prevent the non-bending portion 32 of the anti-collision beam 3 from bending and deforming during the bending process.

[0046] Step S4: After the anti-collision beam 3 is fixed, the portion 31 of the anti-collision beam 3 to be bent is heated.

[0047] Specifically, after the anti-collision beam 3 is fixed, the circumference of the portion to be bent 31 is heated to reduce the surface hardness of the portion to be bent 31 and improve the plasticity of the portion to be bent 31 .

[0048] Step S5: After the bending portion 31 is heated to a preset temperature, the bending machine 2 is driven to bend the anti-collision beam 3 .

[0049] Step S6: After the anti-collision beam 3 is bent and formed, the anti-collision beam 3 and the core rod 1 are removed.

[0050] In the embodiment of the present application, the non-bending portion 32 of the anti-collision beam 3 needs to be clamped and fixed, the portion to be bent 31 of the anti-collision beam 3 needs to be supported by the core rod 1, and the portion to be bent 31 of the anti-collision beam 3 needs to be heated before bending. The above-mentioned bending method heats the portion to be bent 31 to reduce the surface hardness of the portion to be bent 31 and improve the plasticity of the portion to be bent 31, so that the anti-collision beam 3 can be bent in one step without repeated bending processes, thereby reducing the time required for bending the anti-collision beam 3 and reducing the torque required for bending.

[0051] In step S4, after the anti-collision beam 3 is fixed, the portion to be bent 31 of the anti-collision beam 3 is subjected to a heating treatment, including the following steps: heating the tensile side of the portion to be bent 31 to a first temperature, heating the compressive side of the portion to be bent 31 to a second temperature, and heating the other side surfaces of the portion to be bent 31 to a third temperature, wherein the first temperature is greater than the third temperature, and the third temperature is greater than the second temperature. During the bending process, because the tensile and bending stresses on each side surface of the portion to be bent 31 of the anti-collision beam 3 are different, different heating temperatures must be set for each side surface of the portion to be bent 31 to ensure a smooth bending process.

[0052] In an embodiment of the present application, the cross-section of the anti-collision beam 3 is formed into a rectangle or a trapezoid. During the bending process, the tensile side of the portion to be bent 31 requires a larger amount of stretching, and heating the tensile side can reduce the surface hardness and increase the plasticity to avoid cracking due to high surface hardness. During the bending process, the compression side of the portion to be bent 31 requires a larger amount of compression, and heating the compression side to avoid blue brittleness. During the bending process, the other side surfaces of the portion to be bent 31 need to cooperate with the tensile side to undergo a certain amount of stretching, and heating the other side surfaces to ensure the smooth progress of the bending process.

[0053] In an exemplary embodiment of the present application, the core rod 1 is an integrated structure, and the core rod 1 has a first supporting end that abuts against the portion to be bent 31. During the bending process of the anti-collision beam 3, the first side surface of the first supporting end abuts against the tensile side of the portion to be bent 31, and a spacing space is formed between the second side surface of the first supporting end and the compression side of the portion to be bent 31, wherein the first side surface of the first supporting end is arranged opposite to the second side surface of the first supporting end.

[0054] The core rod 1 is arranged as an integrated structure, which makes it easy to take and place the core rod 1 .

[0055] like Figure 2 As shown, the cross section of the core rod 1 is adapted to the cavity of the anti-collision beam 3 to support the portion to be bent 31 of the anti-collision beam 3. Specifically, the anti-collision beam 3 and the core rod 1 are both rectangular structures, and the core rod 1 has a first supporting end and a second supporting end, the first supporting end abuts against the portion to be bent 31, and the second supporting end supports the end of the anti-collision beam 3. The tensile side of the first supporting end close to the portion to be bent 31 is chamfered, that is, the first side surface of the first supporting end is an arc-shaped surface, and before bending, the arc-shaped surface and the tensile side of the portion to be bent 31 do not contact each other, and as the portion to be bent 31 is gradually bent, the arc-shaped surface gradually contacts the tensile side of the portion to be bent 31 until the arc-shaped surface is completely in contact with the tensile side of the portion to be bent 31. Before bending, the second side surface of the first support end abuts the compression side of the portion to be bent 31. As the portion to be bent 31 gradually bends, the second side surface of the first support end gradually separates from the compression side of the portion to be bent 31, until a larger gap is formed between the second side surface of the first support end and the compression side of the portion to be bent 31. In addition, the tension side of the first support end near the portion to be bent 31 is rounded to form a gap between the mandrel rod 1 and the cavity of the anti-collision beam 3, facilitating the removal and placement of the mandrel rod 1.

[0056] Among them, the first side surface of the first support end is processed into an arc surface to adapt to the deformation process of the first side surface of the first support surface, that is, the first side surface of the first support surface is gradually formed into an arc surface during the bending process, so that the first side surface of the first support surface can fully support the tensile side of the bending part 31.

[0057] In another exemplary embodiment of the present application, the mandrel rod 1 is a spliced ​​structure, and during the bending process of the anti-collision beam 3 , the mandrel rod 1 can be bent along the thickness direction of the mandrel rod 1 .

[0058] The core rod 1 is designed as a spliced ​​structure. During the bending process, the core rod 1 is adaptively bent along with the bending of the anti-collision beam 3 to fully support the cavity of the anti-collision beam 3 to avoid large deformation of the cavity of the anti-collision beam 3.

[0059] like Figure 3 As shown, the core rod 1 is made up of multiple splicing bodies 11, and the multiple splicing bodies 11 are arranged in sequence along the length direction of the splicing body 11, and two adjacent splicing bodies 11 are rotatably connected. During the bending process of the anti-collision beam 3, the first side surface of the splicing body 11 abuts against the tensile side of the part to be bent 31, and the second side surface of the splicing body 11 abuts against the compression side of the part to be bent 31, wherein the first side surface of the splicing body 11 and the second side surface of the splicing body 11 are arranged opposite to each other.

[0060] It should be noted that before bending, the first side surface of the splicing body 11 abuts against the tensile side of the part to be bent 31, and the second side surface of the splicing body 11 abuts against the compression side of the part to be bent 31; during the bending process, the first side surface of the splicing body 11 abuts against the tensile side of the part to be bent 31, and the second side surface of the splicing body 11 abuts against the compression side of the part to be bent 31; after bending forming, the first side surface of the splicing body 11 abuts against the tensile side of the part to be bent 31, and the second side surface of the splicing body 11 abuts against the compression side of the part to be bent 31; the core rod 1 adopts a splicing structure, which can provide more sufficient support for the cavity of the anti-collision beam 3.

[0061] Specifically, if Figure 4 As shown, extension plates 12 are provided on both sides of the splicing body 11. The extension plates 12 are extended along the length direction of the splicing body 11. The two adjacent splicing bodies 11 are rotatably connected through the extension plates 12 so that the spliced ​​core rod 1 can be bent along its own thickness direction.

[0062] As an alternative embodiment, Figure 5 As shown, pin holes are provided on two opposite sides of the splicing body 11, and two adjacent splicing bodies 11 are connected by a connecting plate 13. Specifically, one of the two adjacent splicing bodies 11 is rotatably connected to the connecting plate 13, and the other splicing body 11 is rotatably connected to the connecting plate 13, wherein the connecting plate 13 is arranged to fit the side surfaces of the splicing body 11, and the two adjacent connecting plates 13 abut along the length direction of the splicing body 11.

[0063] Furthermore, the first side surface of the splicing body 11 is processed into a curved surface, and the second side surface of the splicing body 11 is processed into a curved surface. The first and second side surfaces of the splicing body 11 are configured as curved surfaces to adapt to the bending process of the portion to be bent 31, so that the first side surface of the splicing body 11 always maintains contact with the tensile side of the portion to be bent 31, and the second side surface of the splicing body 11 always maintains contact with the compression side of the portion to be bent 31. During the bending process, the first side surface of the splicing body 11 is in line contact with the tensile side of the portion to be bent 31, and the second side surface of the splicing body 11 is in line contact with the compression side of the portion to be bent 31.

[0064] Furthermore, if Figure 3 As shown, the core rod 1 is a spliced ​​structure, and the anti-collision beam 3 is bent upward. During the bending process of the anti-collision beam 3, the anti-collision beam 3 has a downward running effect. The spliced ​​body 11 and the anti-collision beam 3 are in relative motion. The friction force on the spliced ​​body 11 is directed upward, while the friction force on the anti-collision beam 3 is directed downward. Under the action of the friction force, the wrinkles generated on the compressed side of the to-be-bent portion 31 of the anti-collision beam 3 are released to a certain extent, thereby greatly improving the surface quality of the anti-collision beam 3 and making the anti-collision beam 3 fit more perfectly with the vehicle body.

[0065] In step S2, the anti-collision beam 3 is moved so that the core rod 1 is inserted into the cavity of the anti-collision beam 3, including the following steps: during the movement of the anti-collision beam 3, some of the multiple splicing bodies 11 pass through the to-be-bent portion 31 of the anti-collision beam 3 and extend to the non-bending portion 32 of the anti-collision beam 3.

[0066] The non-bending portions 32 on both sides of the to-be-bent portion 31 of the anti-collision beam 3 are supported by the splicing body 11 to prevent the cavity of the non-bending portions 32 from deforming, thereby improving the rigidity of the anti-collision beam 3 .

[0067] According to another specific embodiment of the present application, a bending device for the anti-collision beam 3 is provided.

[0068] Specifically, if Figure 1 As shown, the bending equipment includes: a bending machine 2, a mandrel 1, a feeding device 4, a clamping device 5 and a heating device 6. The mandrel 1 is detachably connected to the bending machine 2, and the feeding device 4 is arranged along the axial direction of the mandrel 1. The feeding device 4 is used to drive the anti-collision beam 3 to move along the axial direction of the mandrel 1 so that the mandrel 1 is inserted into the cavity of the anti-collision beam 3. The clamping device 5 is arranged along the axial direction of the mandrel 1, and the clamping device 5 is used to clamp and fix the anti-collision beam 3. The heating device 6 is arranged along the axial direction of the mandrel 1, and the heating device 6 is located between the clamping device 5 and the bending machine 2. The heating device 6 is used to heat the anti-collision beam 3.

[0069] The bending machine 2 is a numerically controlled bending machine 2 in the prior art, and is used to bend the anti-collision beam 3 .

[0070] The mandrel rod 1 is detachably connected to the bending machine 2 , and a corresponding mandrel rod 1 can be selected according to the size of the anti-collision beam 3 .

[0071] The feeding device 4 is detachably connected to the anti-collision beam 3 to move the anti-collision beam 3 to the bending station. The feeding device 4 can be a transmission belt structure, the anti-collision beam 3 is placed on the conveyor belt, and the motor drives the transmission belt to circulate.

[0072] As an alternative embodiment, the feeding device 4 may also adopt a slider guide rail structure, the anti-collision beam 3 is positioned on the slider, and the motor drives the slider to move along the guide rail.

[0073] One end of the clamping device 5 is connected to the installation base. The clamping device 5 is provided with a clamp adapted to the anti-collision beam 3. The clamp is fitted and clamped to the outer wall of the anti-collision beam 3. The clamp is fitted to the anti-collision beam 3 through a rubber pad to protect the anti-collision beam 3.

[0074] As an alternative embodiment, the clamp of the clamping device 5 can also be a clamping claw, as long as it can clamp the anti-collision beam 3.

[0075] The heating device 6 uses laser heating to heat the portion 31 of the anti-collision beam 3 to be bent. The heating device 6 is equipped with multiple laser heaters, each with its own adjustable heating temperature, allowing for separate heating of different sides of the anti-collision beam 3. Each laser heater is detachably connected to the mounting base, allowing for easy maintenance and replacement.

[0076] According to another specific embodiment of the present application, a vehicle is provided. The vehicle includes an anti-collision beam 3. The anti-collision beam 3 is formed by bending using the above-mentioned bending method.

[0077] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0078] 1. The non-bending portion 32 of the anti-collision beam 3 needs to be clamped and fixed, the portion to be bent 31 of the anti-collision beam 3 needs to be supported by the core rod 1, and the portion to be bent 31 of the anti-collision beam 3 needs to be heated before bending. The above bending method heats the portion to be bent 31 to reduce the surface hardness of the portion to be bent 31 and improve the plasticity of the portion to be bent 31, so that the anti-collision beam 3 can be bent in one step without repeated bending processes, thereby reducing the time required for bending the anti-collision beam 3 and reducing the torque required for bending.

[0079] 2. The core rod 1 is a spliced ​​structure. During the bending process of the anti-collision beam 3, the core rod 1 can bend adaptively with the bending of the anti-collision beam 3, so it can provide more sufficient support for the cavity of the anti-collision beam 3 to reduce the deformation of the cavity of the anti-collision beam 3, thereby improving the rigidity of the anti-collision beam 3.

[0080] 3. The core rod 1 is a splicing structure. During the bending process of the anti-collision beam 3, the splicing body 11 and the anti-collision beam 3 move relative to each other. The direction of the friction force exerted on the splicing body 11 is upward. The friction force exerted on the anti-collision beam 3 can release the wrinkles generated by the anti-collision beam 3 to a certain extent, thereby greatly improving the surface quality of the anti-collision beam 3 and making the fit between the anti-collision beam 3 and the vehicle body more perfect.

[0081] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0082] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also falls within the scope of the present invention.

[0083] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for bending an anti-collision beam, characterized in that: The steps include: Connecting the mandrel rod (1) to the bending machine (2); Moving the anti-collision beam (3) so that the core rod (1) is inserted into the cavity of the anti-collision beam (3); After the anti-collision beam (3) moves to a preset position, the anti-collision beam (3) is clamped and fixed; After the anti-collision beam (3) is fixed, the portion (31) of the anti-collision beam (3) to be bent is subjected to a heating treatment; After the portion to be bent (31) is heated to a preset temperature, the bending machine (2) is driven to bend the anti-collision beam (3); After the anti-collision beam (3) is bent and formed, the anti-collision beam (3) and the core rod (1) are removed.

2. The bending method according to claim 1, characterized in that: After the anti-collision beam (3) is fixed, the portion (31) of the anti-collision beam (3) to be bent is subjected to a heating treatment, comprising: The stretching side of the portion to be bent (31) is heated to a first temperature, the compression side of the portion to be bent (31) is heated to a second temperature, and the other side surfaces of the portion to be bent (31) are heated to a third temperature, wherein the first temperature is greater than the third temperature, and the third temperature is greater than the second temperature.

3. The bending method according to claim 1, characterized in that: The core rod (1) is an integrated structure, and the core rod (1) has a first supporting end abutting against the portion to be bent (31). During the bending process of the anti-collision beam (3), the first side surface of the first supporting end abuts against the tension side of the portion to be bent (31), and a spacing space is formed between the second side surface of the first supporting end and the compression side of the portion to be bent (31), wherein the first side surface of the first supporting end is arranged opposite to the second side surface of the first supporting end.

4. The bending method according to claim 3, characterized in that: The first side surface of the first supporting end is processed into an arc-shaped surface.

5. The bending method according to claim 1, characterized in that: The core rod (1) is a spliced ​​structure, and during the bending process of the anti-collision beam (3), the core rod (1) can be bent along the thickness direction of the core rod (1).

6. The bending method according to claim 5, characterized in that: The core rod (1) is formed by splicing a plurality of splicing bodies (11), wherein the plurality of splicing bodies (11) are arranged in sequence along the length direction of the splicing body (11), and two adjacent splicing bodies (11) are rotatably connected. During the bending process of the anti-collision beam (3), the first side surface of the splicing body (11) abuts against the tensile side of the portion to be bent (31), and the second side surface of the splicing body (11) abuts against the compression side of the portion to be bent (31), wherein the first side surface of the splicing body (11) and the second side surface of the splicing body (11) are arranged opposite to each other.

7. The bending method according to claim 6, characterized in that: The first side surface of the splicing body (11) is processed into a curved surface, and the second side surface of the splicing body (11) is processed into a curved surface.

8. The bending method according to claim 6, characterized in that: Moving the anti-collision beam (3) so that the core rod (1) is inserted into the cavity of the anti-collision beam (3), comprising: During the movement of the anti-collision beam (3), some of the plurality of spliced ​​bodies (11) extend through the to-be-bent portion (31) of the anti-collision beam (3) to the non-bending portion (32) of the anti-collision beam (3).

9. A bending device for an anti-collision beam, characterized in that: include: Bending machine (2); A mandrel rod (1), the mandrel rod (1) being detachably connected to the bending machine (2); A feeding device (4), the feeding device (4) being arranged along the axial direction of the core rod (1), the feeding device (4) being used to drive the anti-collision beam (3) to move along the axial direction of the core rod (1), so that the core rod (1) is inserted into the cavity of the anti-collision beam (3); A clamping device (5), the clamping device (5) being arranged along the axial direction of the core rod (1), and the clamping device (5) being used to clamp and fix the anti-collision beam (3); A heating device (6), wherein the heating device (6) is arranged along the axial direction of the core rod (1), the heating device (6) is located between the clamping device (5) and the bending machine (2), and the heating device (6) is used to heat the anti-collision beam (3).

10. A vehicle, comprising an anti-collision beam (3), characterized in that: The anti-collision beam (3) is formed by bending using the bending method described in any one of claims 1 to 8.

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