A crash beam structure and a crash beam structure bending device

Abstract

This invention relates to the field of automotive parts and manufacturing equipment technology, and discloses a crash beam structure and a crash beam structure bending device. The crash beam structure includes a crash beam, a reinforcing structure, and two mounting seats. The crash beam includes a straight pipe section and curved pipe sections formed at both ends of the straight pipe section. The reinforcing structure is disposed on the inner wall of the curved pipe section and extends along its length. Multiple collapsible guides extending circumferentially are constructed on the mounting seats. The crash beam structure bending device includes a frame, a pipe clamping device, a bending forming device, and a lateral limiting device. The bending forming device includes a forming mold with a forming cavity, and the inner wall of the forming cavity is provided with rib forming portions. This invention has the effect of preventing the curved pipe section from springing back, improving the collision deformation mode, and enabling the simultaneous forming of the reinforcing structure during the pipe bending process.

Description

Technical Field

[0001] This invention relates to the field of automotive parts and manufacturing equipment technology, and in particular to a crash beam structure and a crash beam structure bending device. Background Technology

[0002] Anti-collision beams are an important component of a vehicle's passive safety system. They are mainly used to absorb and disperse collision energy during low-speed collisions, protecting the vehicle body and the safety of its occupants.

[0003] Traditional anti-collision beams are typically straight tubes with their ends connected to the longitudinal beams of the vehicle body via mounting brackets.

[0004] When impacted, this type of straight-tube anti-collision beam is prone to forming a V-shaped bend in the middle, which prevents the collision energy from being effectively transferred to both ends, causing the anti-collision beam to fail prematurely and may intrude into the cockpit space, posing a threat to the safety of the occupants.

[0005] To improve the stress performance of the anti-collision beam and its compatibility with the vehicle body structure, existing technologies employ anti-collision beams with curved arcs.

[0006] However, after the manufacture of these anti-collision beams with curved sections, due to the internal stress generated during the bending process, the curved parts are prone to springback after long-term storage or use, resulting in a reduction in curvature, which affects the assembly accuracy with the vehicle body and the force transmission path during a collision.

[0007] In addition, existing bending equipment can usually only complete a single bending process and cannot strengthen the structure of the pipe while bending, so production efficiency needs to be improved. Summary of the Invention

[0008] In order to overcome the springback problem of the bent part of the anti-collision beam and improve the deformation mode during collision, the present invention provides an anti-collision beam structure and an anti-collision beam structure bending device.

[0009] The present invention provides a crash beam structure and a crash beam structure bending device, which adopts the following technical solution: A crash beam structure, comprising: The anti-collision beam includes a straight pipe section and curved pipe sections integrally formed at both ends of the straight pipe section; The reinforcing structure is installed on the inner wall of the bend in the curved pipe section and extends along the length of the curved pipe section. Two mounting brackets are connected to two corresponding curved pipe sections, respectively; Each mounting base has multiple collapsible guides that extend circumferentially along the mounting base.

[0010] Optionally, the mounting base includes a mounting cylinder, with a collapse guide disposed on the side wall of the mounting cylinder.

[0011] Optionally, the collapse guide is a groove formed on the side wall of the mounting cylinder, and the length direction of the groove is perpendicular to the axis of the mounting cylinder.

[0012] Optionally, the mounting base may also include a mounting plate for connection to the vehicle body, with the mounting cylinder disposed on the mounting plate.

[0013] Optionally, a positioning groove is provided on the side wall of the mounting cylinder. The positioning groove is used to accommodate a portion of the bent pipe section for positioning the bent pipe section. The positioning groove extends from the end of the mounting cylinder away from the mounting plate toward the end closer to the mounting plate and passes through that end.

[0014] Optionally, the reinforcing structure is a raised rib that protrudes into the inside of the curved pipe section, and the raised rib is a concave arc-shaped rib.

[0015] A bending device for a crash beam structure, used to manufacture the aforementioned crash beam structure, comprising: frame; A pipe clamping device is mounted on the frame and is used to clamp one end of the pipe and move it along the frame; A bending and forming device, mounted on a frame, is used to bend the other end of the pipe. A lateral limiting device is installed on the frame and located between the pipe clamping device and the bending forming device, and is used to laterally limit the pipe during bending. The bending forming device includes a forming mold, which has a forming cavity for accommodating the pipe. The inner wall of the forming cavity is provided with a rib forming part, which is used to extrude a reinforcing structure on the inner wall of the pipe during the bending process.

[0016] Optionally, the pipe clamping device includes: The sliding base is slidably mounted on the frame. A positioning sleeve, installed on a sliding seat, is used to accommodate and position the end of the pipe. The clamping assembly is installed at the end of the positioning sleeve and is used to clamp the pipe.

[0017] Optional, the clamping assembly includes: The guide cone is fixed to the outer periphery of the end of the positioning sleeve; The drive ring is sleeved on the outside of the positioning sleeve and is driven by a clamping drive to slide along the positioning sleeve; Multiple grippers are distributed circumferentially along the drive ring and are rotatably connected to the drive ring. Each gripper has a drive ramp on its wall. When the drive ring moves the gripper, the drive inclined surface interacts with the guide cone, causing the gripper to retract towards the center to clamp the pipe.

[0018] Optionally, the molding die includes a first mold body and a second mold body that can move relative to each other, and the first mold body and the second mold body are closed to form a molding cavity.

[0019] In summary, the present invention has at least one of the following beneficial technical effects: 1. By setting a reinforcing structure extending along the length of the inner wall of the curved pipe section, the deformation resistance of the curved pipe section is effectively enhanced, the springback tendency caused by the release of internal stress is suppressed, and the dimensional stability and assembly accuracy of the anti-collision beam are guaranteed. 2. By constructing multiple circumferentially extending crumple guides on the mounting base, when the anti-collision beam is impacted, the mounting base can deform in an orderly manner according to the preset crumple guides, guiding the entire anti-collision beam to move in the contraction direction of the mounting base. This changes the deformation mode of the traditional anti-collision beam with a V-shaped bend in the middle, and improves the efficiency of collision energy absorption and transmission. 3. The bending device of the present invention achieves a composite molding process in which a reinforcing structure is extruded simultaneously during the bending process by setting a rib forming part on the inner wall of the forming cavity of the forming mold, which greatly improves production efficiency and ensures the integrity of the reinforcing structure and the bent pipe section. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram illustrating the mounting base structure in an embodiment of the present invention.

[0022] Figure 3 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0023] Figure 4 This is a schematic diagram of the overall structure of the bending device according to an embodiment of the present invention.

[0024] Figure 5 yes Figure 4 Enlarged diagram of part B.

[0025] Figure 6 This is a schematic diagram illustrating the relative positions of the drive ring and the gripper in an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram illustrating the support roller structure in an embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram illustrating the relative positions of the first and second phantoms in an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures: 1. Anti-collision beam; 11. Straight pipe section; 12. Bent pipe section; 2. Reinforced structure; 3. Mounting base; 31. Collapse guide; 32. Mounting cylinder; 33. Mounting plate; 34. Positioning slot; 5. Frame; 6. Pipe clamping device; 61. Sliding seat; 62. Positioning sleeve; 63. Clamping assembly; 631. Guide cone; 632. Drive ring; 633. Gripper; 634. Drive inclined plane; 7. Bending forming device; 71. Forming mold; 711. First mold body; 712. Second mold body; 713. Rotating seat; 714. Rib groove forming part; 8. Lateral limiting device; 9. Support roller; 91. Height adjusting cylinder. Detailed Implementation

[0029] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0030] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] In the description of the embodiments of this invention, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, B existing alone, and A and B existing simultaneously. Furthermore, the symbol " / " in this invention generally indicates that the preceding and following associated objects have an "or" relationship. The term "multiple" refers to two or more.

[0032] In the description of the embodiments of the present invention, the technical terms "center", "length", "width", "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0033] The following is in conjunction with the appendix Figures 1-8 The present invention will be described in further detail below.

[0034] This invention discloses a crash beam structure.

[0035] A crash beam structure includes a crash beam 1, a reinforcing structure 2, and two mounting bases 3.

[0036] The anti-collision beam 1 includes a straight pipe section 11 and curved pipe sections 12 integrally formed at both ends of the straight pipe section 11.

[0037] The reinforcing structure 2 is provided on the inner wall of the curved pipe section 12 and extends along the length of the curved pipe section 12.

[0038] The two mounting bases 3 are respectively connected to the two curved pipe sections 12.

[0039] Each mounting base 3 has multiple collapsible guides 31 along the axial direction of the mounting base 3, and each collapsible guide 31 extends circumferentially along the mounting base 3.

[0040] The anti-collision beam 1, as the main load-bearing and energy-absorbing component, is made entirely of hollow tubing.

[0041] The straight pipe section 11 is located in the middle of the anti-collision beam 1 and provides the main bending strength.

[0042] The curved pipe section 12 is located at both ends of the straight pipe section 11 and is used to transfer the impact force to the mounting base 3 and the vehicle body.

[0043] The straight pipe section 11 and the curved pipe section 12 are manufactured through an integral molding process, such as a pipe bending process, which ensures the integrity of the structure and avoids the strength weakening and stress concentration caused by welding.

[0044] By setting a reinforcing structure 2 on the inner wall of the curved pipe section 12, the moment of inertia of the section in the curved area is increased from a mechanical performance perspective, thereby enhancing the deformation stiffness of the area.

[0045] This increased stiffness effectively counteracts the residual tensile and compressive stresses generated within the bending area of ​​the steel pipe during cold bending, thereby suppressing angular rebound caused by the slow release of internal stress over time. This ensures that the curvature of the anti-collision beam 1 remains stably within the design tolerance range over a long period, guaranteeing precise assembly with the vehicle body.

[0046] Mounting bracket 3 is used to connect the anti-collision beam 1 to the longitudinal beam of the vehicle body.

[0047] Multiple crumple guides 31 are provided circumferentially on the mounting base 3 to guide the weakened areas of stress concentration and deformation modes.

[0048] When a vehicle is involved in a frontal collision, if the impact force on the anti-collision beam 1 exceeds a preset threshold, the impact force will first act on the anti-collision beam 1 and then be transmitted to the mounting base 3 via the curved pipe section 12.

[0049] These collapsing guides 31, acting as the starting point and guide groove for deformation, induce the mounting base 3 to undergo orderly and predictable axial compression and collapse, contracting like a bellows.

[0050] This allows the entire anti-collision beam 1 to move backward in a preset direction and absorb energy, changing the failure mode of traditional steel pipe anti-collision beams that bend into a V shape from the middle and then intrude into the cockpit, significantly improving collision energy absorption efficiency and occupant protection capabilities.

[0051] Mounting base 3 includes mounting cylinder 32, and collapsible guide part 31 is disposed on the side wall of mounting cylinder 32.

[0052] The mounting cylinder 32 is a cylindrical structure that is directly connected to the curved pipe section 12. Its internal cavity is similar to that inside the pipe and it is the core component for connection and force transmission.

[0053] By placing the crumple guide 31 on the side wall of the mounting cylinder 32, the axial impact force can be converted into local buckling or wrinkling of the side wall of the mounting cylinder 32 when a collision occurs, thereby achieving stable axial compression deformation and guiding the entire anti-collision beam 1 structural system to move backward and absorb energy in a controllable manner without causing unstable bending or torsion.

[0054] The collapse guide 31 is a groove formed on the side wall of the mounting cylinder 32, and the length direction of the groove is perpendicular to the axis of the mounting cylinder 32.

[0055] The collapsible guide 31 is specifically embodied as a groove, which is the simplest, most efficient and low-cost processing method, and can be formed by stamping or machining.

[0056] The length of the groove is perpendicular to the axis of the mounting cylinder 32, that is, it extends along the circumference of the mounting cylinder 32.

[0057] This circumferential arrangement of grooves has two significant advantages: Firstly, when subjected to compressive force along the axis of the mounting cylinder 32, a ring-shaped stress concentration area will form at the root of the groove. This can induce a ring-shaped, accordion-like progressive compression deformation, with an extremely stable deformation mode and high energy absorption efficiency.

[0058] Secondly, the vertical arrangement does not weaken the structural support strength of the mounting cylinder 32 in the radial direction (i.e., the swing direction of the bent pipe section 12), ensuring the rigidity of the connection structure during daily driving.

[0059] Mounting base 3 also includes mounting plate 33 for connection with vehicle body, and mounting cylinder 32 is disposed on mounting plate 33.

[0060] Mounting plate 33 is a flat plate structure with a certain area and thickness, which usually has multiple bolt holes for a firm surface contact connection with the end plate of the vehicle body longitudinal beam by bolts.

[0061] The mounting cylinder 32 is vertically fixed to the surface of the mounting plate 33, forming a stable "T" or "L" shaped connecting support. This ensures that in the event of a collision, after the mounting cylinder 32 undergoes crumpling deformation, it can directly and stably transmit the residual force to the vehicle body longitudinal beam, and its crumpling action will not deviate from the preset direction due to the deformation of the mounting point.

[0062] A positioning slot 34 is provided on the side wall of the mounting cylinder 32. The positioning slot 34 is used to accommodate a part of the bent pipe section 12 in order to position the bent pipe section 12. The positioning slot 34 extends from the end of the mounting cylinder 32 away from the mounting plate 33 toward the mounting plate 33 and passes through that end.

[0063] The shape of the positioning slot 34 is designed to mimic the curvature of the end of the curved pipe section 12. During assembly, simply insert the end of the curved pipe section 12 into the positioning slot 34 to quickly and accurately position the anti-collision beam 1 relative to the mounting base 3 without the need for complex tooling fixtures.

[0064] The positioning slot 34 forms an open notch, allowing the bent pipe section 12 to be directly inserted from the top of the mounting cylinder 32, which greatly facilitates the assembly operation.

[0065] The bent pipe section 12 is fixedly connected to the mounting cylinder 32.

[0066] After positioning via the positioning slot 34, the bent pipe section 12 and the mounting cylinder 32 are fixedly connected by welding. After insertion, the inner wall of the positioning slot 34 surrounds and supports a portion of the bent pipe section 12, which not only achieves positioning but also increases the connection area for subsequent welding.

[0067] Welding is a metal joining process widely used in the manufacturing of automotive parts. The weld metal formed at the joint is integrated with the base material, resulting in a high connection strength and good rigidity.

[0068] This connection method ensures that, in the event of a collision, the impact force can be effectively transferred from the anti-collision beam 1 to the mounting base 3 through the curved pipe section 12, preventing the anti-collision beam 1 from detaching or becoming unstable due to connection failure, thus ensuring the integrity and reliability of the collision energy transfer path.

[0069] The reinforcing structure 2 is a raised rib that protrudes into the inside of the curved pipe section 12. The raised rib is a concave arc-shaped rib.

[0070] Reinforcing structure 2 adopts the form of raised ribs, that is, a ridge-like structure that rises from the wall of the pipe to the internal space of the pipe.

[0071] This inward-protruding design enhances bending stiffness by utilizing the material's own structure while maintaining a smooth and flat outer contour of the curved pipe section 12. It does not occupy external layout space and is beneficial for the design of the vehicle's front end and pedestrian protection.

[0072] The protruding ribs are further defined as concave arc-shaped ribs. Their rounded contours avoid the generation of sharp stress concentration points. While enhancing rigidity, they will not undergo brittle fracture due to notch effect when subjected to impact, thus combining strength and toughness.

[0073] The implementation principle of the anti-collision beam structure in this embodiment of the invention is as follows: the anti-collision beam 1 is integrally formed into a straight pipe section 11 and two curved pipe sections 12 at both ends by a pipe bending process, and an arc-shaped reinforcing structure 2 protruding inward is simultaneously formed on the inner wall of the curved pipe section 12 to solve the bending springback problem.

[0074] During the assembly stage, the end of the bent pipe section 12 is placed into the positioning slot 34 of the mounting cylinder 32 for quick positioning, and then the two are welded together to fix them.

[0075] In the event of a collision, the anti-collision beam 1 absorbs the impact force and transmits it to the mounting base 3. The groove on the side wall of the mounting cylinder 32, perpendicular to its axis, serves as a preset deformation induction point, guiding the mounting cylinder 32 to undergo stable axial crushing deformation, causing the anti-collision beam 1 to move backward to absorb energy and prevent it from bending towards the cockpit.

[0076] This invention discloses a bending device for a crash beam structure, which is specifically used to manufacture the aforementioned crash beam structure.

[0077] A bending device for a crash beam structure includes a frame 5, a pipe clamping device 6, a bending forming device 7, and a lateral limiting device 8.

[0078] The pipe clamping device 6 is mounted on the frame 5 and is used to clamp one end of the pipe and move it along the frame 5.

[0079] The bending forming device 7 is mounted on the frame 5 and is used to bend the other end of the pipe.

[0080] The lateral limiting device 8 is mounted on the frame 5 and located between the pipe clamping device 6 and the bending forming device 7, and is used to laterally limit the pipe during bending.

[0081] The frame 5 provides a stable foundation support for the entire device, and is equipped with guide rods or guide rails to guide the linear reciprocating motion of the pipe clamping device 6.

[0082] The core function of the pipe clamping device 6 is to clamp and move the pipe.

[0083] It achieves reciprocating motion along the frame 5 via a linear displacement drive, such as a pneumatic or hydraulic cylinder. The linear displacement drive is located at the end of the frame 5 furthest from the bending and forming device 7.

[0084] When the pipe clamping device 6 clamps the pipe and pushes it toward the bending forming device 7, the pipe is driven into the bending forming device 7 for forming.

[0085] The lateral limiting device 8 includes a limiting block 81 and a limiting drive component 82.

[0086] The side wall of the limiting block 81 is provided with a groove for accommodating the pipe. The limiting block 81 is connected to the limiting drive member 82 for transmission. The limiting drive member 82 is used to drive the limiting block 81 to move in order to adjust its position.

[0087] In this embodiment, the limiting drive component 82 is a cylinder.

[0088] During the bending process, the limiting drive component 82 pushes the limiting block 81 from the side to approach the tube, so that the middle part of the tube is embedded in the groove of the limiting block 81, thereby limiting the tube from improperly swinging or deviating during bending, and ensuring that the bending position and curvature of the bent tube section 12 are precisely controlled.

[0089] The bending forming device 7 includes a forming mold 71, which has a forming cavity for accommodating the tube. The inner wall of the forming cavity is provided with a rib forming part 714, which is used to extrude a reinforcing structure 2 on the inner wall of the tube during the bending process.

[0090] The bending forming device 7 also includes a rotating seat 713 and a rotation drive.

[0091] The rotating base 713 is mounted on the frame 5 and rotates with the frame 5 around a vertical axis. A rotary drive is used to drive the rotating base 713 to rotate around the vertical axis, thereby rotating the forming mold 71 mounted thereon to achieve the bending and forming of the pipe. In this embodiment, the rotary drive uses a servo motor or a hydraulic motor and is connected to the rotating base 713 for transmission.

[0092] The forming mold 71 has an irregularly shaped forming cavity for accommodating the tubing. On the wall of the forming cavity corresponding to the inner bend of the final product's bent pipe section 12, an inwardly protruding rib forming part 714 is provided.

[0093] As the rotating seat 713 drives the forming mold 71 to rotate, the pipe clamping device 6 pushes the pipe forward, causing the pipe to undergo plastic bending deformation in the forming cavity. During this process, the outer wall of the pipe is stretched and elongated, while the inner wall is compressed and shortened.

[0094] At this time, the rib forming part 714 in the forming cavity will simultaneously apply an inward squeezing force to the inner wall of the bent pipe. Utilizing the plastic deformation characteristics of the material under pressure, the reinforcing structure 2 in the form of raised ribs is extruded in one piece and in one piece in the inner ring of the bent pipe section 12, realizing the composite processing of bending and strengthening.

[0095] The pipe clamping device 6 includes a sliding seat 61, a positioning sleeve 62, and a clamping assembly 63.

[0096] The sliding seat 61 is slidably mounted on the frame 5.

[0097] The positioning sleeve 62 is installed on the sliding seat 61 to accommodate and position the end of the pipe.

[0098] The clamping assembly 63 is installed at the end of the positioning sleeve 62 and is used to clamp the pipe.

[0099] The sliding seat 61 is the load-bearing base. It slides with the guide rod or guide rail on the frame 5 and is driven by the linear displacement drive mechanism to achieve precise horizontal reciprocating movement.

[0100] The inner diameter of the positioning sleeve 62 is clearance-fitted with the outer diameter of the pipe, providing a precise straight guide channel for the pipe and preventing it from becoming unstable and bending during the force-driven propulsion process.

[0101] The clamping assembly 63 is installed at the end of the positioning sleeve 62 facing the bending forming device 7. Its function is to firmly lock the end of the tube inserted into the positioning sleeve 62 before bending, ensuring that the tube will not slip relative to the clamping device under strong pushing force, thus ensuring the accuracy of the bending length.

[0102] The clamping assembly 63 includes a guide cone 631, a drive ring 632, and multiple grippers 633.

[0103] The guide cone 631 is fixed to the outer periphery of the end of the positioning sleeve 62.

[0104] The drive ring 632 is sleeved on the outside of the positioning sleeve 62 and is driven by a clamping drive to slide along the positioning sleeve 62.

[0105] Multiple grippers 633 are distributed circumferentially along the drive ring 632 and are rotatably connected to the drive ring 632. Each gripper 633 has a drive ramp 634 on its outer wall.

[0106] When the drive ring 632 drives the gripper 633 to move, the drive inclined surface 634 interacts with the guide cone 631, and the drive gripper 633 retracts towards the center to clamp the pipe.

[0107] The guide cone 631 is fixed on the positioning sleeve 62, and its inner wall is conical.

[0108] The drive ring 632 can slide axially along the positioning sleeve 62 in a separate clamping drive component. In this embodiment, the clamping drive component is a cylinder, and the push rod of the cylinder is connected to the drive ring 632 in a transmission connection.

[0109] When the drive ring 632 moves away from the bending forming device 7, it will drive the multiple grippers 633 hinged to it to move together. The drive inclined surface 634 of the grippers 633 contacts the inner wall of the guide cone 631 and generates relative sliding, so that the front end of the grippers 633 moves radially inward around the hinge point, thereby synchronously and uniformly clamping the pipe from multiple directions.

[0110] This structure provides uniform clamping force, making it less likely to flatten thin-walled pipes. It also has self-locking properties, maintaining a locked state even when the driving force is removed, solely due to friction.

[0111] The molding die 71 includes a first mold body 711 and a second mold body 712 that can move relative to each other. After the first mold body 711 and the second mold body 712 are closed, a molding cavity is formed.

[0112] The molding die 71 is designed as a split-type opening and closing mold structure. The first mold body 711 serves as the fixed mold, and the second mold body 712 serves as the moving mold. The two achieve relative movement through guide rails and linear drive mechanisms.

[0113] In this embodiment, the first mold body 711 is mounted on the rotary seat 713, and the second mold body 712 is mounted on the rotary seat 713 via a mounting base, with the second mold body 712 slidingly engaged with the mounting base. The second mold body 712 is driven to move by a linear drive component to achieve mold opening and closing actions. In this embodiment, the linear drive component is a cylinder.

[0114] The first mold body 711 and the second mold body 712 are respectively provided with grooves. When the mold is closed, the two grooves are joined together to form a complete molding cavity and a rib groove molding part 714.

[0115] After bending is completed, the linear drive component drives the second mold 712 away from the first mold 711, which makes it easy to remove the already formed anti-collision beam 1. This solves the problem of difficult demolding of workpieces after completing large-angle or complex-shaped bending of conventional one-piece pipe bending molds.

[0116] In this embodiment, the frame 5 is also provided with a support roller 9.

[0117] The support roller 9 is located near the guide cone 631, and the roller surface of the support roller 9 rolls in contact with the outer wall of the guide cone 631 or the positioning sleeve 62.

[0118] The support roller 9 is connected to the frame 5 via a height adjustment cylinder 91, and its support height can be adjusted by the height adjustment cylinder 91.

[0119] The support roller 9 provides auxiliary support to the free ends of the positioning sleeve 62 and the guide cone 631, preventing them from sagging due to their own weight and force, ensuring that the tube always remains in a precise horizontal straight state, and guaranteeing the accuracy of bending and forming.

[0120] The implementation principle of the anti-collision beam structure bending device in this embodiment of the invention is as follows: a straight tubular material is inserted into the positioning sleeve 62, the cylinder drives the drive ring 632 to move, and drives the gripper 633 to retract towards the center to lock and fix the material.

[0121] The limit drive 82 pushes the limit block 81 to a preset position, so that its groove is aligned with the predetermined bending area in the middle of the pipe.

[0122] Driven by the cylinder, the second mold 712 moves toward the first mold 711, completing the mold closing and forming a complete molding cavity.

[0123] The rotary drive drives the rotating seat 713 and the forming mold 71 mounted on it to rotate around the vertical axis. At the same time, the linear displacement drive pushes the pipe clamping device 6 forward along the frame 5, and the pipe bends in the forming cavity.

[0124] During the bending process, the rib forming part 714 of the forming cavity inner wall simultaneously squeezes the inner wall of the pipe at the bending point, causing it to bulge inward to form a reinforcing structure 2.

[0125] After bending is completed, the second mold body 712 is opened, the clamps 633 are released, and the manufactured anti-collision beam 1 can be taken out.

[0126] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A crash beam structure, characterized in that: include: The anti-collision beam (1) includes a straight pipe section (11) and curved pipe sections (12) integrally formed at both ends of the straight pipe section (11). A reinforcing structure (2) is provided on the inner wall of the curved pipe section (12) and extends along the length of the curved pipe section (12); Two mounting bases (3) are respectively connected to the two curved pipe sections (12); Each of the mounting bases (3) is provided with a plurality of collapse guides (31) that extend circumferentially along the mounting base (3).

2. The anti-collision beam structure according to claim 1, characterized in that: The mounting base (3) includes a mounting cylinder (32), and the collapse guide (31) is disposed on the side wall of the mounting cylinder (32).

3. The anti-collision beam structure according to claim 2, characterized in that: The collapse guide (31) is a groove formed on the side wall of the mounting cylinder (32), and the length direction of the groove is perpendicular to the axis of the mounting cylinder (32).

4. The anti-collision beam structure according to claim 2, characterized in that: The mounting base (3) also includes a mounting plate (33) for connecting to the vehicle body, and the mounting cylinder (32) is disposed on the mounting plate (33).

5. The anti-collision beam structure according to claim 2, characterized in that: The mounting cylinder (32) has a positioning slot (34) on its side wall. The positioning slot (34) is used to accommodate a part of the curved pipe section (12) to position the curved pipe section (12). The positioning slot (34) extends from one end of the mounting cylinder (32) away from the mounting plate (33) toward the mounting plate (33) and through that end.

6. The anti-collision beam structure according to claim 1, characterized in that: The reinforcing structure (2) is a raised rib protruding into the inside of the curved pipe section (12), and the raised rib is an inwardly concave arc-shaped rib.

7. A bending device for a crash beam structure, used to manufacture the crash beam structure according to any one of claims 1 to 6, characterized in that: include: Rack (5); A pipe clamping device (6) is provided on the frame (5) for clamping one end of the pipe and moving it along the frame (5); A bending forming device (7) is installed on the frame (5) and is used to bend the other end of the pipe. A lateral limiting device (8) is provided on the frame (5) and located between the pipe clamping device (6) and the bending forming device (7) for lateral limiting of the pipe during bending; The bending forming device (7) includes a forming mold (71), which has a forming cavity for accommodating the tube. The inner wall of the forming cavity is provided with a rib forming part (714), which is used to extrude the reinforcing structure (2) on the inner wall of the tube during the bending process.

8. The anti-collision beam structure bending device according to claim 7, characterized in that: The pipe clamping device (6) includes: A sliding seat (61) is slidably mounted on the frame (5); A positioning sleeve (62) is installed on the sliding seat (61) to accommodate and position the end of the tube. A clamping assembly (63) is installed at the end of the positioning sleeve (62) for clamping the pipe.

9. A bending device for an anti-collision beam structure according to claim 8, characterized in that: The clamping assembly (63) includes: A guide cone (631) is fixed to the outer periphery of the end of the positioning sleeve (62); A drive ring (632) is sleeved on the outside of the positioning sleeve (62) and is driven by a clamping drive to slide along the positioning sleeve (62); Multiple grippers (633) are distributed circumferentially along the drive ring (632) and are rotatably connected to the drive ring (632). Each gripper (633) has a drive ramp (634) on its wall. When the drive ring (632) drives the gripper (633) to move, the drive inclined surface (634) interacts with the guide cone (631) to drive the gripper (633) to retract towards the center to clamp the pipe.

10. A bending device for a crash beam structure according to claim 7, characterized in that: The molding die (71) includes a first mold body (711) and a second mold body (712) that can move relative to each other. The molding cavity is formed after the first mold body (711) and the second mold body (712) are closed.

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