Kitchen refrigerator door shell metal plate production line, shell and forming process method

Abstract

The invention discloses a kitchen refrigerator door shell metal plate production line, the production line is sequentially provided with a feeding mechanical arm, a combined punching machine, an overturning machine, a bending unit, a four-corner covering machine, a two-end bending machine and a discharging mechanical arm, by adopting the multi-section kitchen refrigerator door shell production process method, the production cost is reduced, and the production efficiency is improved. The invention further provides a plurality of shell structures which are good in integrity and high in durability and a kitchen refrigerator door shell metal plate forming process method.

Description

Technical Field

[0001] This invention belongs to the field of sheet metal bending technology. Specifically, this invention relates to a sheet metal production line for kitchen refrigerator door shells, the shell shell, and the forming process. Background Technology

[0002] Existing kitchen freezer door shells are mostly made of spliced ​​panels connected by connectors or welding, resulting in poor overall integrity and aesthetics. The handle part of the door shell has a relatively complex structure, and it is difficult to meet the strength and aesthetic requirements using existing processes. This makes the product prone to deformation under external forces during use, resulting in poor durability. In addition, the production lines for producing kitchen freezer door shells are underdeveloped, and many processing steps require manual operation, resulting in low production efficiency and high cost for producing one-piece kitchen freezer door shells.

[0003] Patent CN112474924A, published on March 12, 2021, discloses a bending method for cold-rolled steel sheet metal parts. The bending device used in this method includes a first base plate, a second base plate, a support column, a first mounting column, and a second mounting column. One end of the support column is fixedly connected to the first base plate, and the other end is fixedly connected to the second base plate. The first mounting column is fixedly connected to the center of the upper outer surface of the first base plate, and the second mounting column is fixedly connected to the center of the lower outer surface of the second base plate. However, this bending method for cold-rolled steel sheet metal parts does not solve the aforementioned technical problem. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a production line for sheet metal cabinet doors that improves production efficiency, enhances overall shell integrity, and increases durability, along with the shell itself and its molding process.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] This kitchen freezer door sheet metal production line is equipped with a feeding robot, a combined punching machine, a turning machine, a bending unit, a four-corner edge-wrapping machine, a two-end bending machine, and a unloading robot in sequence.

[0007] The production line is equipped with a conveyor track that extends from the tilting machine to the unloading robot. The tilting machine includes a motor connected to a rotating shaft, on which a tilting platform is fixedly connected. A conveyor roller is provided between the loading robot and the combined punching machine. A material support frame is provided between the combined punching machines. A material support plate is provided on the top of the material support frame, and a cylinder is connected to the bottom of the material support plate.

[0008] The bending unit includes a first bending machine, a second bending machine, a third bending machine, a fourth bending machine, and a fifth bending machine, which are arranged sequentially.

[0009] The housing is manufactured using the aforementioned kitchen freezer door sheet metal production line. The housing has an end flange at one end, and the end flange has a folded edge. The multi-section housing has a handle groove located on one side of the end flange.

[0010] The handle groove includes multiple folded edges, and the end folded edges and the folded edges form an inner cavity.

[0011] Between the oblique fold and the end fold, there are a first fold, a second fold, and a third fold in sequence. The second fold and the third fold are both attached to the inner side of the end fold, and the second fold is perpendicular to the end fold.

[0012] The end of the shell is provided with rounded corners.

[0013] The sheet metal forming process for kitchen freezer door shells, implemented using the aforementioned sheet metal production line for kitchen freezer door shells, includes the following steps: Step 1, feeding; Step 2, punching; Step 3, flipping; Step 4, bending; Step 5, edge binding; Step 6, bending at both ends; Step 7, unloading.

[0014] Step S2 includes the following steps: edge punching on one long side and one short side of the board; rotating the board; edge punching on the other long side and the other short side of the board.

[0015] The technical effects of this invention are as follows: By adopting the sheet metal production line, shell, and forming process method for kitchen refrigerator door shells of this invention, the production processes of sheet metal production, such as loading and unloading, punching, flipping, bending, and edge wrapping, are realized, which can meet the co-line production of kitchen refrigerator door shells with various cross-sectional shapes, improve production efficiency, and reduce the space occupied by the production line; it also proposes a shell structure with multiple cross-sectional shapes, which, compared with the existing splicing or combination structure, has higher overall performance, reduces the number of connecting parts used, and has the advantages of high structural strength, durability, reliability, and good aesthetics; this invention also proposes a forming process method for kitchen refrigerator door shells. Attached Figure Description

[0016] This manual includes the following figures, which illustrate the following:

[0017] Figure 1 This is a schematic diagram of the main structure of the sheet metal production line for kitchen refrigerator door shells of the present invention;

[0018] Figure 2 This is a top view structural diagram of the sheet metal production line for kitchen refrigerator door shells of the present invention;

[0019] Figure 3 This is a front view schematic diagram of the material support plate of the present invention;

[0020] Figure 4 This is a top view of the material support plate of the present invention;

[0021] Figure 5 This is a top view schematic diagram of the flipping machine of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the first type of shell end section of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of the second type of shell end section of the present invention;

[0024] Figure 8 This is a schematic diagram of the third type of shell end section of the present invention;

[0025] Figure 9 This is a schematic diagram of the fourth type of shell end section of the present invention;

[0026] The markings in the diagram are as follows: 1. Loading robot; 2. Combined punching machine; 3. Turning machine; 4. Bending unit; 5. Four-corner edge wrapping machine; 6. Two-end bending machine; 7. Unloading robot; 8. Conveyor roller; 9. Conveying track; 10. Material support frame; 11. First bending machine; 12. Second bending machine; 13. Third bending machine; 14. Fourth bending machine; 15. Fifth bending machine; 16. End fold; 17. Flanged edge; 18. Beveled edge; 19. Handle groove; 20. Rounded corner; 21. First fold; 22. Second fold; 23. Third fold; 24. Inner cavity; 25. Cylinder; 26. Motor; 27. Material support plate; 28. Turning platform; 29. ​​Control cabinet. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0028] like Figure 1 and Figure 2 As shown, the sheet metal production line for kitchen freezer doors is equipped with a feeding robot 1, a combined punching machine 2, a turning machine 3, a bending unit 4, a four-corner edge-wrapping machine 5, a two-end bending machine 6, and a unloading robot 7 in sequence.

[0029] After the sheet metal parts have completed the punching process, burrs or uneven edges may be produced. The sheet metal is flipped before bending to ensure product quality. The flipping machine 3, driven by motor 26, rotates multiple flipping platforms 180° to the head of the conveyor track 9 for bending. After bending, the sheet metal parts are edged by an edge-sealing machine to form three continuous edges on both sides of the housing and the opposite ends of the handle, thus strengthening the sheet metal's resistance to deformation, improving overall performance and the aesthetics of the edges, and avoiding the risk of personnel or equipment injury from sharp edges. After the edge-sealing process, the two-end bending machine 6 bends both ends of the sheet metal to form flanges 17, which are then picked up and unloaded by a robotic arm to complete the processing. Multiple control cabinets 29 are also installed on the side of the production line for production personnel to control and adjust relevant process parameters. The sheet metal needs to be positioned after loading, before punching, and after flipping. The unloading robotic arm 7 consists of a transfer robotic arm and a seven-link robotic arm.

[0030] like Figure 2 As shown, the production line is equipped with a conveyor track 9, which extends from the tilting machine 3 to the unloading robot 7. The tilting machine 3 includes a motor 26, which is connected to a rotating shaft, and a tilting platform 28 is fixedly connected to the rotating shaft. A conveyor roller 8 is provided between the loading robot 1 and the combined punching machine 2. A material support frame 10 is provided between the combined punching machines 2. A material support plate 27 is provided on the top of the material support frame 10, and a cylinder 25 is connected to the bottom of the material support plate 27. Multiple combined punching machines 2 are provided. A conveyor roller 8 is provided on the side of the combined punching machine 2 closest to the loading robot 1 to facilitate the conveying of sheet metal to the material support assembly of the combined punching machine 2. Material support plates 27 are also provided between the combined punching machines 2. The material support plates 27 are arranged alternately and driven by a pair of cylinders 25 arranged in opposite directions to realize the transfer of sheet metal between adjacent punching machines, which can save the length of the conveyor track 9 and reduce the difficulty of production line layout.

[0031] like Figure 1 and Figure 2 As shown, the bending unit 4 includes a first bending machine 11, a second bending machine 12, a third bending machine 13, a fourth bending machine 14, and a fifth bending machine 15, which are arranged sequentially. The sequential arrangement of these multiple bending machines allows for the production of shells with various cross-sections on a single production line, significantly improving overall production efficiency, meeting diverse product demands, reducing equipment downtime, and enabling continuous production. The first bending machine 11, the second bending machine 12, and the third bending machine 13 constitute shells with the first and second cross-sections, while the first bending machine 11, the fourth bending machine 14, and the fifth bending machine 15 constitute shells with the third and fourth cross-sections.

[0032] like Figures 6 to 9 As shown, the shell is manufactured using the aforementioned kitchen refrigerator door shell sheet metal production line. The shell has an end flange 16 at one end, and a flange 17 at the end of the end flange 16. A handle groove 19 is provided on the multi-section shell, located on one side of the end flange 16. The end flange 16 and flange 17 serve as mounting positions for components such as sealing strips and back panels, facilitating subsequent assembly, enhancing sealing performance, increasing the rigidity of the shell for greater stability during use, and improving appearance quality. The end flange 16 and flange 17 form a U-shaped structure, improving the sealing performance of the door shell and better aligning with the sealing strip to ensure a tight seal between the door shell and the cabinet, thus ensuring insulation performance. The handle groove 19 is formed by bending along with the door shell during processing, eliminating the need for connecting parts, increasing overall strength, facilitating tensile force distribution, extending the handle's lifespan, reducing the handle's space occupation, and improving aesthetics.

[0033] like Figures 6 to 9 As shown, the handle groove 19 includes multiple folded edges, with the end folded edge 16 and the folded edges forming an inner cavity 24. The above structures represent the third and fourth types of shell end cross-sectional shapes. In this type of shell structure, the handle groove 19 is formed by continuously bending a sheet metal to create multiple folded edges. The folded edges contact the end folded edge 16, creating a certain distance between the end folded edge 16 and the oblique folded edge 18 while forming the inner cavity 24 structure, thus expanding the grip size and providing a better grip. The inner cavity 24 can be equipped with a sealing connector on the inside of the folded edges, with the connecting end of the sealing connector located within the inner cavity 24 and not exposed to the outside of the shell, thereby forming a concealed handle structure. The production of the above two shell cross-sections only requires changing the folding knife to process the corresponding finger buckle structure, resulting in higher production flexibility. This type of shell structure can distribute the stress, making the handle more durable, maintaining structural strength, and improving aesthetics.

[0034] like Figure 8 and Figure 9 As shown, a first fold 21, a second fold 22, and a third fold 23 are sequentially provided between the oblique fold 18 and the end fold 16. The second fold 22 and the third fold 23 are both fitted against the inner side of the end fold 16, with the second fold 22 perpendicular to the end fold 16. The above structure represents the first and second types of shell end cross-sectional shapes. The perpendicular arrangement of the second fold 22 and the end fold 16 ensures the flatness of the installation plane between the shell and the outer shell, and ensures the consistency of the fastening action on the connecting parts of the shell. The design of the second fold 22 and the third fold 23 fitting against the end fold 16 allows for better dispersion and absorption of force when the user pulls the handle or when subjected to external force, resulting in higher structural strength and greater durability.

[0035] like Figure 7As shown, the end of the casing has a rounded corner 20. This rounded corner is formed by bending a rounded corner molding strip. The rounded corner design makes the transition at the edges of the casing smooth, improving the overall appearance. Furthermore, the rounded corner design disperses stress, reducing stress concentration and thus minimizing the risk of breakage or deformation during use. The rounded corner design also makes the handle of the freezer door more comfortable to hold.

[0036] The manufacturing process for the kitchen freezer door shell is achieved using the aforementioned kitchen freezer door shell sheet metal production line, and includes the following steps: Step 1, feeding; Step 2, punching; Step 3, flipping; Step 4, bending; Step 5, edge binding; Step 6, bending at both ends; Step 7, unloading.

[0037] Step S2 includes the following steps: edge punching on one long side and one short side of the board; rotating the board; edge punching on the other long side and the other short side of the board. After the punching process, bending notches are formed at the four corners of the board, which facilitates bending the board to form folded edges and flanges 17, so that the board can be formed into the outer shell structure of the freezer door through subsequent processes.

[0038] This invention relates to a sheet metal production line, shell, and forming process for kitchen refrigerator doors. It realizes the production processes of loading and unloading, punching, flipping, bending, and edge binding in sheet metal production, enabling the co-line production of kitchen refrigerator door shells with various cross-sectional shapes, improving production efficiency, and reducing production line space. Furthermore, it proposes shell structures with multiple cross-sectional shapes, which, compared to existing splicing or combined structures, offer higher overall performance, reduce the number of connecting parts, and have advantages such as high structural strength, durability, reliability, and aesthetics. The invention also proposes a forming process for kitchen refrigerator door shells.

[0039] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A sheet metal production line for kitchen freezer door shells, characterized in that: The production line is equipped with a feeding robot, a combined punching machine, a turning machine, a bending unit, a four-corner edge-sealing machine, a two-end bending machine, and a unloading robot in sequence.

2. The kitchen freezer door sheet metal production line according to claim 1, characterized in that: The production line is equipped with a conveyor track that extends from the tilting machine to the unloading robot. The tilting machine includes a motor connected to a rotating shaft, on which a tilting platform is fixedly connected. A conveyor roller is provided between the loading robot and the combined punching machine. A material support frame is provided between the combined punching machines. A material support plate is provided on the top of the material support frame, and a cylinder is connected to the bottom of the material support plate.

3. The kitchen freezer door sheet metal production line according to claim 2, characterized in that: The bending unit includes a first bending machine, a second bending machine, a third bending machine, a fourth bending machine, and a fifth bending machine, which are arranged sequentially.

4. A housing, manufactured using the sheet metal production line for kitchen refrigerator door housings as described in any one of claims 1 to 3, characterized in that: The end of the housing is provided with an end flange, and the end of the end flange is provided with a folded edge. The multi-section housing is provided with a handle groove, and the handle groove is located on one side of the end flange.

5. The housing according to claim 4, characterized in that: The handle groove includes multiple folded edges, and the end folded edges and the folded edges form an inner cavity.

6. The housing according to claim 4, characterized in that: Between the oblique fold and the end fold, there are a first fold, a second fold, and a third fold in sequence. The second fold and the third fold are both attached to the inner side of the end fold, and the second fold is perpendicular to the end fold.

7. The housing according to claim 6, characterized in that: The end of the shell is provided with rounded corners.

8. A method for forming sheet metal for kitchen refrigerator doors, implemented using the sheet metal production line for kitchen refrigerator doors as described in any one of claims 1 to 3, characterized in that, Includes the following steps: Step 1: Loading material; Step 2: Punching; Step 3: Flipping; Step 4: Bending; Step 5: Edge binding; Step 6: Bending both ends; Step 7: Unloading.

9. The sheet metal forming process for kitchen refrigerator door shells according to claim 8, characterized in that, Step S2 includes the following steps: edge punching on one long side and one short side of the board; rotating the board; edge punching on the other long side and the other short side of the board.

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