A lower beam bending apparatus

Abstract

The utility model provides a lower beam bending equipment, including mobile beam, mobile beam both ends are equipped with with mobile beam sliding contact's vertical roof, mobile beam upside is equipped with with two vertical roof connection fixed roof beam, mobile beam downside is equipped with with two vertical roof connection fixed bottom beam, hydraulic cylinder installs between mobile beam and roof beam, lower beam bending forming seat installs on the bottom beam upper surface, is installed with the sheet metal pressure plate part that cooperates with lower beam bending forming seat on mobile beam, two studs are penetrated two vertical holes respectively, vertical hole upside and vertical hole downside are equipped with with the nut of stud screw connection, mobile beam is installed with two groups and stud cooperation's support piece, the utility model has the beneficial effect that avoids the indentation, crack of pressure overload result, is appropriate to lengthen the stroke when aiming at thick material, ensures bending fully, both adapt the sheet metal processing demand of many thickness, guarantee the quality of forming stable.

Description

Technical Field

[0001] This utility model is a lower beam bending device, belonging to the field of refrigerator parts processing. Background Technology

[0002] During the sheet metal bending process of the refrigerator's lower beam, the core transmission and forming structure of the equipment revolves around the linkage logic of "hydraulic cylinder - moving beam - sheet metal pressure plate": the hydraulic cylinder, as the power source, drives the moving beam to move smoothly along a preset trajectory through hydraulic drive, while the sheet metal pressure plate mounted at the bottom of the moving beam will form a precise fit with the fixed lower beam bending forming seat as the moving beam moves down. When the pressure plate comes into contact with the sheet metal placed on the forming seat, the two apply pressure to the sheet metal through the preset surface structure, so that the sheet metal gradually conforms to the contour of the forming seat, and finally forms a bent shape that meets the size requirements of the refrigerator's lower beam.

[0003] In actual production, the sheet metal of the refrigerator's lower beam varies in thickness. To accommodate the bending requirements of sheet metal of different thicknesses and avoid insufficient bending of thin materials or incomplete forming of thick materials due to insufficient extension and retraction stroke of the hydraulic cylinder, the extension and retraction stroke of the hydraulic cylinder is usually set to a margin, that is, to reserve extra stroke beyond the maximum thickness of the sheet metal. While this design solves the compatibility problem, it introduces new processing risks: when bending thinner sheet metal, if the hydraulic cylinder extends according to the preset margin stroke, the moving beam will cause the sheet metal pressure plate to move down too far. At this time, the pressure of the pressure plate on the sheet metal will far exceed the reasonable range required for bending thin materials, causing excessive compression of the sheet metal in some areas—at best, obvious indentations and deformation; at worst, cracks or even breakage of the sheet metal material, directly damaging the forming accuracy and structural integrity of the refrigerator's lower beam. This not only increases the scrap rate but also requires readjustment of equipment parameters and rework, affecting overall production efficiency and product quality stability. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lower beam bending device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lower beam bending device, comprising: The movable beam has vertical beams at both ends that slide in contact with it. The upper side of the movable beam has a top beam that is fixed to the two vertical beams, and the lower side of the movable beam has a bottom beam that is fixed to the two vertical beams. The hydraulic cylinder is installed between the moving beam and the top beam; A lower beam bending forming seat is installed on the upper surface of the bottom beam, and a sheet metal pressure plate part that cooperates with the lower beam bending forming seat is installed on the movable beam; Two studs are provided. Two vertical holes are symmetrically arranged about the sheet metal pressure plate on the upper surface of the moving beam. The two studs pass through the two vertical holes respectively. Nuts that are threaded to the studs are provided on the upper and lower sides of the vertical holes. Two sets of support members that cooperate with the studs are installed on the moving beam.

[0006] Furthermore, the support includes a bracket, with a bracket provided directly below each of the two studs. The bracket rests on the movable beam, and legs are installed at both ends of the bracket. A positioning plate is installed at the lower end of each leg, and two fixing holes are formed on the upper surface of the positioning plate.

[0007] Furthermore, each side of the outrigger is provided with a limiting plate that fits against the side of the outrigger. The limiting plate is connected and fixed to the bottom beam. A horizontal plate is attached to the side of the outrigger facing the bottom beam. The two ends of the horizontal plate are respectively connected and fixed to the two limiting plates.

[0008] Furthermore, the upper surface of the support is recessed to form a positioning hole, a positioning head is inserted into the positioning hole, a protective plate is installed at the upper end of the positioning head, and the protective plate is positioned directly below the stud and arranged concentrically with the stud.

[0009] Furthermore, a reinforcing beam is provided on the underside of the bottom beam, and the two ends of the reinforcing beam are respectively connected and fixed to two vertical beams.

[0010] Furthermore, two guide posts are installed on the upper surface of the bottom beam, and two guide holes that cooperate with the guide posts are opened on the movable beam, with the guide posts passing through the guide holes.

[0011] Furthermore, a threaded head is installed at the lower end of the guide post, and two through holes are opened on the upper surface of the bottom beam. The lower end of the guide post passes through the through holes, and the threaded head is threadedly connected to the reinforcing beam.

[0012] Furthermore, tension springs are provided on both sides of the hydraulic cylinder, and rings are attached to both ends of the tension springs. The rings at both ends of one tension spring are respectively connected to the top beam and the moving beam.

[0013] The beneficial effects of this utility model are: Two studs pass through symmetrically arranged vertical holes on the moving beam. The nuts on the upper and lower sides of the vertical holes can be adjusted by threads to form a lower limit for the downward movement of the moving beam. When processing sheet metal of different thicknesses, simply adjust the fixed position of the nuts on the studs to limit the maximum downward movement distance of the sheet metal pressure plate driven by the moving beam. For thin materials, shorten the downward stroke to avoid indentations and cracks caused by pressure overload; for thick materials, appropriately extend the stroke to ensure sufficient bending. This not only adapts to the processing needs of sheet metal of various thicknesses but also ensures stable forming quality. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural schematic diagram of a lower beam bending device according to the present invention; Figure 2 This is a perspective view of a lower beam bending device according to the present invention. Figure 3 This is an exploded structural diagram of the guide column, stud, and moving beam in a lower beam bending device according to this utility model; Figure 4 This is an exploded structural diagram of the protective plate and support in a lower beam bending device according to the present invention; In the picture: 1. Moving beam; 11. Vertical beam; 12. Top beam; 13. Bottom beam; 14. Reinforcing beam; 15. Vertical hole; 16. Guide hole; 2. Hydraulic cylinder; 3. Stud; 31. Nut; 4. Tension spring; 5. Sheet metal pressing plate section; 51. Lower beam bending forming seat; 6. Support; 61. Protective plate; 62. Limiting plate; 63. Positioning plate; 64. Support leg; 65. Horizontal plate; 66. Positioning head; 67. Positioning hole; 7. Guide column. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] Please see Figures 1-3 This utility model provides a technical solution: a lower beam bending device, including a movable beam 1, with vertical beams 11 at both ends of the movable beam 1 in sliding contact with the movable beam 1, a top beam 12 on the upper side of the movable beam 1 that is connected and fixed to the two vertical beams 11, a bottom beam 13 on the lower side of the movable beam 1 that is connected and fixed to the two vertical beams 11, and a reinforcing beam 14 on the lower side of the bottom beam 13. The two ends of the reinforcing beam 14 are respectively connected and fixed to the two vertical beams 11. The reinforcing beam 14 can improve the stability of the overall structure and avoid deformation of the bottom beam 13 due to long-term stress.

[0017] Hydraulic cylinder 2 is installed between moving beam 1 and top beam 12. Two guide posts 7 are installed on the upper surface of bottom beam 13. Two guide holes 16 are opened on moving beam 1 to mate with the guide posts 7, and the guide posts 7 pass through the guide holes 16. A threaded head is installed at the lower end of the guide post 7. Two through holes are opened on the upper surface of bottom beam 13, so that the threaded head of the lower end of the guide post 7 passes through the through holes and is threadedly connected to the reinforcing beam 14, thus completing the installation of the guide post 7. The guide post 7 and the guide holes 16 cooperate with each other to restrict the movement trajectory of moving beam 1, ensuring that moving beam 1 always moves smoothly vertically and avoiding misalignment between sheet metal pressure plate part 5 and lower beam bending forming seat 51.

[0018] See Figure 1 and Figure 2 The lower beam bending forming seat 51 is installed on the upper surface of the bottom beam 13. A sheet metal pressure plate part 5, which mates with the lower beam bending forming seat 51, is installed on the moving beam 1. Tension springs 4 are provided on both sides of the hydraulic cylinder 2, with rings attached to both ends of each tension spring 4. The rings at both ends of one tension spring 4 are connected to the top beam 12 and the moving beam 1, respectively. The ring design facilitates the installation and removal of the tension springs 4. During the extension and retraction of the hydraulic cylinder 2, the moving beam 1 moves, and the moving beam 1 moves the sheet metal pressure plate part 5 synchronously. The sheet metal pressure plate part 5 cooperates with the lower beam bending forming seat 51 to apply pressure to the sheet metal placed on the lower beam bending forming seat 51, causing the sheet metal to gradually conform to the contour of the lower beam bending forming seat 51, ultimately forming the shape of the refrigerator lower beam. When the hydraulic cylinder 2 extends, the tension spring 4 is stretched; when the hydraulic cylinder 2 retracts, the tension spring 4, under the action of the rebound force, causes the moving beam 1 to tend to move upward, which can accelerate the retraction speed of the hydraulic cylinder 2 and improve processing efficiency.

[0019] See Figures 1-4 Two studs 3 are provided. Two vertical holes 15 are symmetrically arranged around the sheet metal pressure plate 5 on the upper surface of the moving beam 1. The two studs 3 pass through the two vertical holes 15 respectively. Nuts 31, threadedly connected to the studs 3, are provided on both the upper and lower sides of the vertical holes 15. The nuts 31 on the upper and lower sides of the vertical holes 15 can be adjusted by thread, constraining the lower limit of the downward movement of the moving beam 1. When processing sheet metal of different thicknesses, simply adjusting the fixed position of the nuts 31 on the studs 3 limits the maximum downward movement distance of the sheet metal pressure plate 5 driven by the moving beam 1: shortening the downward stroke for thin materials avoids indentations and cracks caused by pressure overload; appropriately extending the stroke for thick materials ensures sufficient bending, adapting to the processing needs of sheet metal of various thicknesses while ensuring stable forming quality.

[0020] See Figures 1-4Each of the two studs 3 has a support 6 directly below it, which overlaps the moving beam 1. Both ends of the support 6 are fitted with legs 64, and the lower end of each leg 64 is fitted with a positioning plate 63. Two fixing holes are formed on the upper surface of the positioning plate 63. Limiting plates 62 are provided on both sides of each leg 64, fitting against the side of the leg 64. The limiting plates 62 are connected and fixed to the bottom beam 13. A horizontal plate 65 is fitted against the side of the leg 64 facing the bottom beam 13, and both ends of the horizontal plate 65 are connected and fixed to the two limiting plates 62 respectively. The horizontal plate 65 and the limiting plates 62 together restrict the position of the legs 64, improving structural stability. The positioning plate 63 is installed at the desired position through the fixing holes, thus restricting the position of the support 6. A positioning hole 67 is recessed on the upper surface of the support 6, into which a positioning head 66 is inserted. A protective plate 61 is installed on the upper end of the positioning head 66, and the protective plate 61 is positioned directly below the stud 3 and concentrically arranged with it. Inserting the positioning head 66 into the positioning hole 67 completes the connection between the protective plate 61 and the support 6. During the downward movement of the stud 3, it first contacts the protective plate 61. Under the protection of the protective plate 61, the service life of the support 6 is extended. If the protective plate 61 is damaged, it can be replaced separately, eliminating the need to replace the entire support 6, thus reducing maintenance costs. Simultaneously, components such as the protective plate 61 and the support 6 can distribute the downward pressure of the stud 3 to an area away from the bottom beam 13, protecting the bottom beam 13 and further improving the overall structural stability.

[0021] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lower beam bending device, characterized in that, include: The movable beam (1) has vertical beams (11) at both ends that slide in contact with the movable beam (1). The upper side of the movable beam (1) is provided with a top beam (12) that is connected and fixed to the two vertical beams (11), and the lower side of the movable beam (1) is provided with a bottom beam (13) that is connected and fixed to the two vertical beams (11). A hydraulic cylinder (2) is installed between the moving beam (1) and the top beam (12); The lower beam bending forming seat (51) is installed on the upper surface of the bottom beam (13), and the movable beam (1) is equipped with a sheet metal pressure plate (5) that cooperates with the lower beam bending forming seat (51). There are two studs (3). The upper surface of the moving beam (1) has two vertical holes (15) symmetrically arranged with respect to the sheet metal pressure plate part (5). The two studs (3) pass through the two vertical holes (15) respectively. Nuts (31) that are threaded to the studs (3) are provided on the upper side and the lower side of the vertical holes (15). Two sets of support members that cooperate with the studs (3) are installed on the moving beam (1).

2. The lower beam bending device according to claim 1, characterized in that: The support includes a bracket (6), and a bracket (6) is provided directly below the two studs (3). The bracket (6) is attached to the moving beam (1). Both ends of the bracket (6) are equipped with legs (64). A positioning plate (63) is installed at the lower end of the legs (64). Two fixing holes are opened on the upper surface of the positioning plate (63).

3. The lower beam bending device according to claim 2, characterized in that: Both sides of the support leg (64) are provided with limiting plates (62) that fit against the side of the support leg (64). The limiting plates (62) are connected and fixed to the bottom beam (13). A horizontal plate (65) is attached to the side of the support leg (64) facing the bottom beam (13). The two ends of the horizontal plate (65) are respectively connected and fixed to the two limiting plates (62).

4. The lower beam bending device according to claim 2, characterized in that: The upper surface of the support (6) is recessed to form a positioning hole (67). A positioning head (66) is inserted into the positioning hole (67). A protective plate (61) is installed on the upper end of the positioning head (66). The protective plate (61) is located directly below the stud (3) and is arranged concentrically with the stud (3).

5. The lower beam bending device according to claim 1, characterized in that: The bottom beam (13) is provided with a reinforcing beam (14) on its lower side, and the two ends of the reinforcing beam (14) are respectively connected and fixed to two vertical beams (11).

6. The lower beam bending device according to claim 5, characterized in that: Two guide posts (7) are installed on the upper surface of the bottom beam (13), and two guide holes (16) are opened on the moving beam (1) to cooperate with the guide posts (7). The guide posts (7) pass through the guide holes (16).

7. A lower beam bending device according to claim 6, characterized in that: The guide post (7) is equipped with a threaded head at its lower end. Two through holes are opened on the upper surface of the bottom beam (13). The guide post (7) passes through the through holes at its lower end. The threaded head is threadedly connected to the reinforcing beam (14).

8. The lower beam bending device according to claim 1, characterized in that: Both sides of the hydraulic cylinder (2) are provided with tension springs (4), and both ends of the tension springs (4) are attached with rings. The rings at both ends of one tension spring (4) are connected to the top beam (12) and the moving beam (1) respectively.

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