Pressurizing forming sealing device
By designing a pressure-filling sealing device, the combination of clamp seat and sealing components is used to solve the problem of difficult sealing of complex structure metal pipe beams in bending forming, and reliable sealing of irregular inner cavity is achieved and molding quality is improved.
Patent Information
- Application Number
- CN202420994630.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-09
AI Technical Summary
During the bending and forming process of metal pipe beams, traditional fillings or pressure charging methods are difficult to effectively seal the inner cavity of complex structures, resulting in poor molding quality. Especially, metal pipe beams with special-shaped cross-sections and complex contours are prone to sealing problems during pressure charging and forming .
A pressure-filling sealing device is designed, adopting a clamp seat and a sealing assembly, including a core, a first sealing layer, a tension bolt and a second sealing layer, through the matching of the core to the inner wall of the metal tube beam and the tension bolts. The extrusion effect combines the annular groove and an elastic sealing layer to achieve a reliable seal of irregular inner cavity.
The sealing problem of complex structure metal pipe beams is effectively solved. Through uniform extrusion and the coordination of elastic sealing layers, the reliability and effect of molding seals are improved, and it is suitable for complex inner cavity structures.
Smart Images
Figure CN222307030U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metal tube beam bending and forming, in particular to a pressure-filled forming sealing device. Background Art
[0002] The bending forming process of metal tube beams is often used in vehicle body structural parts. As the requirements for vehicle body styling become higher and higher, the bending radius of parts becomes smaller, the bending angle becomes larger, the bending profile becomes more complex, and the complexity of product cross-section increases, resulting in wrinkles, extrusion and other deformations at the bends of the product parts during the bending forming process, affecting the quality of product forming. The traditional method is to fill the metal tube beam with fine sand, core rods or other fillers during the forming process. For structural parts with simple inner cavity structures, it can provide sufficient support, but for products with complex structures, the processing effect is not ideal due to the changes in the inner cavity volume caused by filling saturation and processing deformation. Another type of filling is to fill the metal tube beam with high-pressure oil or gas to provide support, but the cross-section of the metal tube beam is mostly a special-shaped structure, which brings about the sealing problem of pressure forming. Utility Model Content
[0003] The utility model is used to overcome the defects of the prior art and provides a pressure-filled molding sealing device to solve the problems mentioned in the background technology.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A pressure forming sealing device comprises a clamp seat, wherein the clamp seat is provided with two clamp seats, which are respectively connected to the two ends of a bent metal tube beam; a sealing assembly is arranged on the clamp seat, the sealing assembly matches the inner wall of the end of the metal tube beam, and can be movably embedded in the inner wall of the metal tube beam to form a seal for the end of the metal tube beam; an oil filling joint is arranged on the sealing assembly, the oil filling joint is connected with the inner cavity of the metal tube beam, and hydraulic oil is filled in the metal tube beam; an upper cover plate, a lower cover plate, a first side clamp plate, and a second side clamp plate are also arranged on the clamp seat, and a cavity enclosed by the upper cover plate, the lower cover plate, the first side clamp plate, and the second side clamp plate matches the outer contour of the end of the metal tube beam, and clamps the metal tube beam.
[0006] The above-mentioned pressure-forming sealing device, the sealing component is composed of a core, a first sealing layer, a tightening bolt, and a tightening plate. The core is composed of a core head and a core handle. The cross-section of the core head matches the inner wall of the end of the metal tube beam. The cross-section of the core handle is proportionally reduced compared to the cross-section of the core head. The first sealing layer is arranged in the gap between the core handle and the metal tube beam; one end of the core handle is connected to the tightening bolt, and a screw hole matching the tightening bolt is arranged on the tightening plate, and one side of the tightening plate is fitted with the clamp seat.
[0007] The above-mentioned pressure-forming sealing device is provided with a through hole on the core, and a strip groove is provided on the clamp seat. The oil filling joint passes through the strip groove and is connected with the through hole of the core; the length of the strip groove is greater than the outer diameter of the oil filling joint, and a displacement is reserved for the follow-up movement of the oil filling joint and the core; the oil filling joint is connected with the oil tank through a high-pressure oil pump.
[0008] In the above-mentioned pressure-forming sealing device, the bent metal tube beam is a single-cavity or double-cavity structure, and each clamp seat is provided with 1-2 sets of sealing components, which respectively match the inner wall of the cavity of the bent metal tube beam.
[0009] The above-mentioned pressure-forming sealing device has an annular groove at the core head, and a second sealing layer matching the annular groove is arranged in the annular groove. The second sealing layer is an elastic sealing body, which is in active extrusion contact with the annular groove and the inner wall of the metal pipe beam.
[0010] In the above-mentioned pressure-forming sealing device, the ratio of the cross-sectional area of the core handle to the cross-sectional area of the core head is 0.6-0.85. Beneficial Effects
[0011] Compared with the prior art, the utility model has the following advantages: First, for the sealing of the irregular inner cavity structure of the metal tube beam, the core is matched with the first sealing layer, and the first sealing layer is squeezed during the pulling process after the core is tightened by the bolt. Since the cross-sectional area of the core handle is smaller than the cross-sectional area of the core head and is proportionally reduced, the first sealing layer is uniformly squeezed. The first sealing layer can be made of polyurethane material, which forms a reliable seal for the irregular gap between the core handle and the inner wall of the metal tube beam during the compression process. Second, by providing an annular groove and a second sealing layer matching it at the core head, the second sealing layer forms a seal between the core head and the inner wall of the metal tube beam, which increases the reliability of the seal compared to using only the first sealing layer. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0014] Figure 2 It is a side view structural schematic diagram of the utility model;
[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;
[0016] The symbols in the figure represent:
[0017] 1. Clamp seat, 2. Metal pipe beam, 3. Oil filling joint, 4. Core, 5. First sealing layer, 6. Tension plate, 101. Upper cover plate, 102. Lower cover plate, 103. First side clamp plate, 104. Second side clamp plate, 401. Tension bolt. DETAILED DESCRIPTION
[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0019] like Figure 1-3 As shown, the utility model includes a clamping seat 1, and the number of clamping seats 1 is 2, which are respectively connected to the two ends of the metal tube beam 2 to be bent. When bending, the clamping seat 1 is fixed to the bending device. A sealing component is provided on the clamping seat 1, and the sealing component matches the inner wall of the end of the metal tube beam 2, and can be movably embedded in the inner wall of the metal tube beam 2 to form a seal for the end of the metal tube beam 2. An oil filling joint 3 is provided on the sealing assembly, and the oil filling joint 3 is connected to the inner cavity of the metal tube beam 2, and the metal tube beam 2 is filled with hydraulic oil.
[0020] Considering that the inner cavity structure of the metal tube beam 2 is mostly irregular, the sealing assembly can adopt the following technical solution: the sealing assembly is composed of a core 4, a first sealing layer 5, a tension bolt 401, and a fastening plate 6. The core 4 is composed of a core head and a core handle. The cross section of the core head matches the inner wall of the end of the metal tube beam 2. The cross section of the core handle is proportionally reduced compared to the cross section of the core head. The first sealing layer 5 is arranged in the gap between the core handle and the metal tube beam 2. One end of the core handle is connected to the tension bolt 401. The fastening plate 6 is provided with a screw hole matching the tension bolt 401. One side of the fastening plate 6 is in contact with the clamp 1. The ratio of the cross section area of the core handle to the cross section area of the core head is 0.6-0.85. This solution forms an extrusion on the first sealing layer 5 during the process of the core 4 being pulled back by the tightening bolts 401. Since the cross-sectional area of the core handle is smaller than the cross-sectional area of the core head and is proportionally reduced, the first sealing layer 5 is uniformly extruded. The first sealing layer 5 can be made of polyurethane material, which forms a reliable seal on the gap between the core handle and the inner wall of the metal tube beam 2 during the compression process.
[0021] The core 4 is provided with a through hole, the clamping seat 1 is provided with a strip groove, the oil filling joint 3 passes through the strip groove and is connected with the through hole of the core 4; the length of the strip groove is greater than the outer diameter of the oil filling joint 3, and a displacement is reserved for the follow-up movement of the oil filling joint 3 and the core 4; the oil filling joint 3 is connected with the oil tank through a high-pressure oil pump.
[0022] In order to form a reliable seal for the metal tube beam, a second sealing layer can also be set. The following solution can be adopted: an annular groove is set at the head of the core 4, and a second sealing layer matching it is set in the annular groove. The second sealing layer is an elastic sealing body, which is in active extrusion contact with the annular groove and the inner wall of the metal tube beam 2.
[0023] In order to reliably clamp the periphery of the metal tube beam, an upper cover plate 101, a lower cover plate 102, a first side clamp plate 103, and a second side clamp plate 104 are also provided on the clamp seat 1. The cavity formed by the upper cover plate 101, the lower cover plate 102, the first side clamp plate 103, and the second side clamp plate 104 matches the outer contour of the end of the metal tube beam 2, and clamps the metal tube beam 2.
[0024] The metal tube beams 2 used in the automobile industry are mostly single-cavity or double-cavity structures, so each clamping seat 1 may be provided with 1-2 sets of sealing components, which respectively match the inner wall of the cavity of the bent metal tube beam 2.
[0025] The above example adopts a solution of filling high-pressure oil into the cavity of the metal tube beam 2. The oil filling joint 3 can also be replaced with an inflation joint, which is connected to the core 4 and communicated with the inner cavity of the metal tube beam 2 through the through hole on the core 4. The inflation joint is connected to the air pump or the high-pressure air source through the high-pressure air pipe.
Claims
1. A pressure-molded sealing device, characterized in that: The invention comprises a clamp seat (1), wherein the number of the clamp seats (1) is two and the clamp seats (1) are respectively connected to the two ends of the bent metal tube beam (2); a sealing component is arranged on the clamp seat (1), the sealing component matches the inner wall of the end of the metal tube beam (2) and can be movably embedded in the inner wall of the metal tube beam (2) to form a seal for the end of the metal tube beam (2); an oil injection joint (3) is arranged on the sealing component, the oil injection joint (3) is connected to the inner cavity of the metal tube beam (2), and the metal tube beam (2) is filled with hydraulic oil; the clamp seat (1) is also provided with an upper cover plate (101), a lower cover plate (102), a first side clamp plate (103), and a second side clamp plate (104); the cavity formed by the upper cover plate (101), the lower cover plate (102), the first side clamp plate (103), and the second side clamp plate (104) matches the outer contour of the end of the metal tube beam (2) and clamps the metal tube beam (2).
2. The pressure-forming sealing device according to claim 1, characterized in that: The sealing assembly is composed of a core (4), a first sealing layer (5), a tensioning bolt (401), and a connecting plate (6); the core (4) is composed of a core head and a core handle; the cross section of the core head matches the inner wall of the end of the metal tube beam (2); the cross section of the core handle is proportionally reduced compared to the cross section of the core head; the first sealing layer (5) is arranged in the gap between the core handle and the metal tube beam (2); one end of the core handle is connected to the tensioning bolt (401); a screw hole matching the tensioning bolt (401) is arranged on the connecting plate (6); and one side of the connecting plate (6) is in contact with the clamping seat (1).
3. The pressure-forming sealing device according to claim 2, characterized in that: The core (4) is provided with a through hole, the clamping seat (1) is provided with a strip groove, and the oil injection joint (3) passes through the strip groove and is connected to the through hole of the core (4); the length of the strip groove is greater than the outer diameter of the oil injection joint (3), and a displacement amount is reserved for the oil injection joint (3) and the core (4) to follow the movement; the oil injection joint (3) is connected to the oil tank via a high-pressure oil pump.
4. The pressure-molding sealing device according to claim 1, characterized in that: The bent metal tube beam (2) is a single-cavity or double-cavity structure, and each clamping seat (1) is provided with 1-2 sets of sealing components, which respectively match the inner wall of the cavity of the bent metal tube beam (2).
5. The pressure-molding sealing device according to claim 1, characterized in that: An annular groove is arranged at the head of the core (4), and a second sealing layer matching the annular groove is arranged in the annular groove. The second sealing layer is an elastic sealing body, which is in movable extrusion contact with the annular groove and the inner wall of the metal tube beam (2).
6. The pressure-molding sealing device according to claim 2, characterized in that: The ratio of the cross-sectional area of the core handle to the cross-sectional area of the core head is 0.6-0.85.