Special automated production line for civil air defense doors

Abstract

The present invention discloses a special automatic production line for civil air defense doors. The key points of its technical solution include a first welding platform; a first positioning mechanism; a first transmission mechanism. There are two first transmission mechanisms which are respectively located on both sides of the first welding platform, and the two first transmission mechanisms are respectively located at both ends of the arrangement direction of a plurality of plate-shaped raw materials on the first welding platform; a first feeding mechanism; a first welding mechanism; a second welding platform. The second welding platform is horizontally arranged, and a plurality of intermediate parts are arranged along their own width directions on the second welding platform and positioned on the second welding platform; a second positioning mechanism; a second transmission mechanism. The second transmission mechanism is used to transfer the intermediate parts on the first welding platform to the second welding platform; and a second welding mechanism. Through the setting of each transmission mechanism and the welding platform, the plate-shaped raw materials can be automatically arranged and welded, without manual handling and alignment, which not only saves manpower but also improves the docking accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of civil air defense door production, and more specifically, it relates to a special automatic production line for civil air defense doors. Background Art

[0002] A civil air defense door is the door of the entrance and exit of a people's air defense project. For example, the door set in the underground garage of a community. The main function of the civil air defense door is to protect the sheltered personnel and block the blasting damage.

[0003] When producing a civil air defense door, multiple plate-shaped raw materials need to be welded together to form a door leaf, and then a door frame is welded outside the door leaf to form a complete civil air defense door; when welding the door leaf, multiple plate-shaped raw materials need to be combined into a complete door leaf in the form of manual handling, and then the multiple plate-shaped raw materials are welded together by welding to form a complete door leaf.

[0004] In the prior art, most of the plate-shaped raw materials are set as squares. When welding, it is necessary to manually move the plate-shaped raw materials frequently and align the adjacent plate-shaped raw materials with each other, which not only easily wastes a large amount of manpower but also easily causes problems of inaccurate docking. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a special automatic production line for civil air defense doors, which can automatically arrange and weld the plate-shaped raw materials through the setting of each transmission mechanism and welding platform, without manual handling and alignment, thus saving manpower and improving the docking accuracy.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A special automatic production line for civil air defense doors, including a first welding platform, the first welding platform is horizontally arranged, and multiple plate-shaped raw materials are arranged in a straight line and positioned on the first welding platform;

[0007] A first positioning mechanism, the first positioning mechanism is arranged on the first welding platform to be used for positioning multiple plate-shaped raw materials;

[0008] A first transmission mechanism, there are two first transmission mechanisms and they are respectively located on both sides of the first welding platform, and the two first transmission mechanisms are respectively located at both ends of the arrangement direction of multiple plate-shaped raw materials on the first welding platform;

[0009] A first feeding mechanism, there are two first feeding mechanisms and they respectively correspond to the two first transmission mechanisms, and the first feeding mechanism is used to push the plate-shaped raw materials on the corresponding first transmission mechanism to move onto the first welding platform;

[0010] The first welding mechanism is used to weld multiple plate-shaped raw materials on the first welding platform together to form intermediate parts;

[0011] The second welding platform is horizontally arranged, and multiple intermediate parts are arranged along their own width directions on the second welding platform and positioned on the second welding platform;

[0012] The second positioning mechanism is arranged on the second welding platform to position multiple intermediate parts;

[0013] The second transfer mechanism is used to transfer the intermediate parts on the first welding platform to the second welding platform;

[0014] And the second welding mechanism is used to weld multiple plate-shaped raw materials on the second welding platform together to form a door leaf.

[0015] The present invention is further configured as: the first positioning mechanism includes first positioning plates, and there are two first positioning plates. The two first positioning plates are vertically arranged, and the length direction at the top of the first positioning plate is arranged along the arrangement direction of multiple plate-shaped raw materials on the first welding platform. The two first positioning plates are arranged along a direction perpendicular to themselves, and the two first positioning plates are respectively in contact with both sides of the arrangement direction of multiple plate-shaped raw materials;

[0016] The second positioning mechanism includes second positioning plates, and there are two second positioning plates. The two second positioning plates are vertically arranged, and the length direction at the top of the second positioning plate is arranged along the arrangement direction of multiple intermediate parts on the second welding platform. The two second positioning plates are arranged along a direction perpendicular to themselves, and the two second positioning plates are respectively in contact with both sides of the arrangement direction of multiple intermediate parts.

[0017] The present invention is further configured as: the first transfer mechanism is arranged as a conveyor belt, and a number of first partition bars surrounding the first transfer mechanism are fixedly connected to the first transfer mechanism. The length direction of the first partition bars is arranged along the width direction of the first transfer mechanism, and the transfer direction of the first transfer mechanism is perpendicular to the first positioning plate;

[0018] When the first partition bar rotates to the top of the first transfer mechanism, the plate-shaped raw material is located between two adjacent first partition bars, and the transfer front end and transfer rear end of the plate-shaped raw material are respectively in contact with the two first partition bars.

[0019] The present invention is further configured as: the first feeding mechanism includes a feeding plate. The length direction of the feeding plate is parallel to the transfer direction of the plate-shaped raw material, and the feeding plate slides along a direction parallel to the length direction of the partition bar to push the plate-shaped raw material between the two first partition bars to move between the two first positioning plates;

[0020] A fixed table is provided on the side of the first transmission mechanism away from the first welding platform. A cylinder is provided on the first fixed table to drive the feeding plate to slide.

[0021] The present invention is further configured such that the first welding platform can slide in the vertical direction;

[0022] The first feeding mechanism further includes a rotating rod, which is provided on the side of the feeding plate close to the first welding platform. The rotating rod is rotatably connected to the feeding plate and the rotation axis is parallel to the sliding direction of the feeding plate.

[0023] The present invention is further configured such that the second transmission mechanism is a conveyor belt, and the transmission direction of the second transmission mechanism is horizontal and perpendicular to the transmission direction of the first transmission mechanism;

[0024] A number of second partition strips surrounding the second transmission mechanism are fixedly connected to the second transmission mechanism. The length direction of the second partition strips is arranged along the width direction of the second transmission mechanism. When the intermediate member is pushed onto the second transmission mechanism, the length direction of the intermediate member is consistent with the transmission direction at the top of the second transmission mechanism, and both ends of the intermediate member are in contact with the adjacent sides of the two second partition strips that are close to each other.

[0025] The present invention is further configured to further include a transfer mechanism for pushing the intermediate member that has completed welding on the first welding platform to move in its own width direction onto the second transmission mechanism;

[0026] The transfer mechanism includes a transfer plate. The length direction of the transfer plate is parallel to the width direction of the intermediate member, and the transfer plate can slide in the width direction of the intermediate member to act on the side of the intermediate member away from the second transmission mechanism and push the intermediate member onto the second transmission mechanism.

[0027] The present invention is further configured to further include a second feeding mechanism. There are two second feeding mechanisms, which are respectively located on the side of the second transmission mechanism away from the second welding platform and on the side of the second welding platform away from the second transmission mechanism. The two second feeding mechanisms are respectively located at both ends of the second positioning plate;

[0028] The structure of the second feeding mechanism is the same as that of the first feeding mechanism, and the second welding platform can slide up and down.

[0029] The present invention is further configured to further include a first leveling mechanism and a second leveling mechanism;

[0030] The first leveling mechanism is located between the first welding platform and the second transmission mechanism. The second leveling mechanism is located on one side of the second welding platform. An output plate is provided on the side of the second welding platform away from the second leveling mechanism. The output plate slides in the horizontal direction to push the door leaf formed by welding on the second welding platform onto the second leveling mechanism.

[0031] The present invention is further configured such that the first leveling mechanism and the second leveling mechanism have the same structure. The first leveling mechanism includes a leveling platform and a pressing plate, and the pressing plate moves up and down above the leveling platform.

[0032] In summary, compared with the prior art, the present invention has the following beneficial effects: Through the arrangement of each transmission mechanism and the welding platform, the present invention can automatically arrange and weld plate-shaped raw materials, eliminating the need for manual handling and alignment, thus saving labor and improving the docking accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the overall structure of the embodiment;

[0034] Figure 2 For Figure 1 Enlarged schematic diagram of part A of

[0035] Figure 3 For Figure 1 Enlarged schematic diagram of part B of

[0036] Figure 4 For Figure 1 Enlarged schematic diagram of part C of

[0037] In the figure: 1, the first transmission mechanism; 11, the first partition bar; 2, the first welding platform; 21, the first positioning plate; 22, the first welding mechanism; 3, the second transmission mechanism; 4, the second welding platform; 41, the second positioning plate; 42, the second welding mechanism; 5, the first feeding mechanism; 51, the feeding plate; 52, the rotating rod; 6, the second feeding mechanism; 7, the first leveling mechanism; 71, the second leveling mechanism; 701, the leveling platform; 702, the pressing plate; 8, the transfer mechanism; 81, the transfer plate; 9, the discharge plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only references to the directions in the drawings. Therefore, the directional terms used are for illustration rather than limitation of the present invention.

[0039] The present invention will be further described below in conjunction with the drawings and preferred embodiments.

[0040] Embodiment: An automatic production line for special air defense doors, see attached Figure 1 - attachedFigure 4 , including a first welding platform 2, a first positioning mechanism, a first transmission mechanism 1, a first feeding mechanism 5, a first welding mechanism 22, a second welding platform 4, a second positioning mechanism, a second transmission mechanism 3, and a second welding mechanism 42. The first welding platform 2 is horizontally arranged, and multiple plate-shaped raw materials are arranged in a straight line and positioned on the first welding platform 2. The first positioning mechanism is arranged on the first welding platform 2 to position multiple plate-shaped raw materials. There are two first transmission mechanisms 1, which are respectively located on both sides of the first welding platform 2, and the two first transmission mechanisms 1 are respectively located at both ends of the arrangement direction of multiple plate-shaped raw materials on the first welding platform 2. There are two first feeding mechanisms 5, which respectively correspond to the two first transmission mechanisms 1. The first feeding mechanism 5 is used to push the plate-shaped raw materials on the corresponding first transmission mechanism 1 to move onto the first welding platform 2. The first welding mechanism 22 is used to weld multiple plate-shaped raw materials on the first welding platform 2 together to form an intermediate piece. The second welding platform 4 is horizontally arranged, and multiple intermediate pieces are arranged in the width direction of themselves and positioned on the second welding platform 4. The second positioning mechanism is arranged on the second welding platform 4 to position multiple intermediate pieces. The second transmission mechanism 3 is used to transmit the intermediate pieces on the first welding platform 2 to the second welding platform 4. The second welding mechanism 42 is used to weld multiple plate-shaped raw materials on the second welding platform 4 together to form a door leaf.

[0041] The plate-shaped raw materials are transmitted to the first welding platform 2 through the first transmission mechanism 1. The plate-shaped raw materials on the first transmission mechanism 1 are pushed onto the first welding platform 2 by the first feeding mechanism 5, and multiple plate-shaped raw materials are arranged in a straight line direction in cooperation with the first positioning mechanism. Then, multiple plate-shaped raw materials are welded together by the first welding mechanism 22 to form an intermediate piece. Then, the intermediate piece is transmitted to the second welding platform 4 through the second transmission mechanism 3. On the second welding platform 4, multiple intermediate pieces are arranged in the width direction of themselves under the action of the second positioning mechanism, and then multiple intermediate pieces are welded together by the second welding mechanism 42 to form a complete door leaf. That is to say, in this embodiment, according to the arrangement mode of the plate-shaped raw materials forming the door leaf, each horizontal row is used as an intermediate piece. First, multiple plate-shaped raw materials forming each horizontal row are welded together to form an intermediate piece, and then multiple intermediate pieces are arranged longitudinally and welded together to form a door leaf.

[0042] Specifically, the first positioning mechanism includes two first positioning plates 21. The two first positioning plates 21 are vertically arranged, and the length direction of the top of the first positioning plate 21 is arranged along the arrangement direction of multiple plate-shaped raw materials on the first welding platform 2. The two first positioning plates 21 are arranged in a direction perpendicular to themselves, and the two first positioning plates 21 are respectively in contact with both sides of the arrangement direction of the multiple plate-shaped raw materials. Through the arrangement of the two first positioning plates 21, multiple plate-shaped raw materials can be arranged in a straight line and adjacent plate-shaped raw materials can be aligned with each other.

[0043] Specifically, the second positioning mechanism includes two second positioning plates 41. The two second positioning plates 41 are vertically arranged, and the length direction of the top of the second positioning plate 41 is arranged along the arrangement direction of multiple intermediate parts on the second welding platform 4. The two second positioning plates 41 are arranged in a direction perpendicular to themselves, and the two second positioning plates 41 are respectively in contact with both sides of the arrangement direction of the multiple intermediate parts. Through the arrangement of the second positioning plate 41, multiple intermediate parts can be positioned, so that multiple intermediate parts are arranged along their width direction and the two ends of adjacent intermediate parts are aligned with each other.

[0044] Specifically, the first transmission mechanism 1 is set as a conveyor belt. A number of first partition bars 11 arranged around the first transmission mechanism 1 are fixedly connected to the first transmission mechanism 1. The length direction of the first partition bars 11 is arranged along the width direction of the first transmission mechanism 1, and the transmission direction of the first transmission mechanism 1 is perpendicular to the first positioning plate 21. When the first partition bars 11 rotate to the top of the first transmission mechanism 1, the plate-shaped raw materials are located between two adjacent first partition bars 11, and the front end and the rear end of the transmission of the plate-shaped raw materials are respectively in contact with the two first partition bars 11. Through the arrangement of the first partition bars 11, the plate-shaped raw materials transmitted on the first transmission mechanism 1 can be positioned. When the mutually approaching sides of two adjacent first partition bars 11 respectively face the mutually approaching sides of the two first positioning plates 21, the plate-shaped raw materials can be pushed between the two first positioning plates 21 only by pushing the plate-shaped raw materials along the length direction of the first partition bars 11.

[0045] Specifically, the first feeding mechanism 5 includes a feeding plate 51 and a fixed platform. The length direction of the feeding plate 51 is parallel to the transmission direction of the plate-shaped raw materials. The feeding plate 51 slides along the direction parallel to the length direction of the partition bars to push the plate-shaped raw materials between the two first partition bars 11 to move between the two first positioning plates 21. The fixed platform is arranged on the side of the first transmission mechanism 1 away from the first welding platform 2, and a cylinder is arranged on the first fixed platform to drive the feeding plate 51 to slide.

[0046] Specifically, the first welding platform 2 can slide in the vertical direction; the first feeding mechanism 5 further includes a rotating rod 52. The rotating rod 52 is disposed on one side of the feeding plate 51 close to the first welding platform 2. The rotating rod 52 is rotatably connected to the feeding plate 51 and the rotation axis is parallel to the sliding direction of the feeding plate 51. After the tops of a plurality of plate-shaped raw materials arranged together are welded by the first welding platform 2, the feeding plates 51 of the two first feeding mechanisms 5 move towards each other and clamp the plurality of plate-shaped raw materials combined together through the rotating rod 52. Then, the first welding platform 2 and the first positioning plate 21 move downward, and the plurality of plate-shaped raw materials are rotated 180 degrees through the rotation of the rotating rod 52, so that the un-welded side of the plate-shaped raw material faces upward. After that, the first welding platform 2 and the first positioning plate 21 move upward, and then the welding of the plate-shaped raw materials is continued by the first welding mechanism 22, so that both sides of the intermediate piece can be welded.

[0047] In order to ensure that the intermediate piece after being flipped 180° can still be accommodated between the two first positioning plates 21, the rotation axis of the rotating rod 52 is set at the middle position in the width direction of the intermediate piece.

[0048] Specifically, the second transmission mechanism 3 is set as a conveyor belt. The transmission direction of the second transmission mechanism 3 is horizontal and perpendicular to the transmission direction of the first transmission mechanism 1; a plurality of second partition strips arranged around the second transmission mechanism 3 are fixedly connected to the second transmission mechanism 3. The length direction of the second partition strips is arranged along the width direction of the second transmission mechanism 3. When the intermediate piece is pushed onto the second transmission mechanism 3, the length direction of the intermediate piece is consistent with the transmission direction at the top of the second transmission mechanism 3, and both ends of the intermediate piece are in contact with the adjacent sides of the two adjacent second partition strips that are close to each other.

[0049] Through the setting of the transmission direction of the second transmission mechanism 3 and the second partition strips, the length direction of the intermediate piece entering the second transmission mechanism 3 can be along the transmission direction of the second transmission mechanism 3 and both ends are respectively positioned by the two adjacent second partition strips. Thus, when the adjacent sides of the two adjacent second partition strips that are close to each other are respectively aligned with the adjacent sides of the two second positioning plates 41 that are close to each other, only by pushing the intermediate piece to slide in the width direction can the intermediate piece enter between the two second positioning plates 41.

[0050] Specifically, this embodiment further includes a transfer mechanism 8. The transfer mechanism 8 is used to push the intermediate piece welded on the first welding platform 2 to move in its own width direction onto the second transmission mechanism 3; the transfer mechanism 8 includes a transfer plate 81. The length direction of the transfer plate 81 is parallel to the width direction of the intermediate piece and the transfer plate 81 can slide in the width direction of the intermediate piece to act on the side of the intermediate piece away from the second transmission mechanism 3 and push the intermediate piece to move onto the second transmission mechanism 3.

[0051] Through the setting of the transfer plate 81, the intermediate piece formed by welding on the first welding platform 2 can be pushed to slide along its own width direction onto the second transmission mechanism 3.

[0052] Specifically, this embodiment further includes a second feeding mechanism 6. There are two second feeding mechanisms 6, which are respectively located on one side of the second transmission mechanism 3 away from the second welding platform 4 and on one side of the second welding platform 4 away from the second transmission mechanism 3. The two second feeding mechanisms 6 are respectively located at both ends of the second positioning plate 41; the structure of the second feeding mechanism 6 is the same as that of the first feeding mechanism 5, and the second welding platform 4 can slide up and down.

[0053] Through the setting of the second feeding mechanism 6, it can not only push the intermediate piece on the second transmission mechanism 3 to move onto the second welding platform 4, but also clamp multiple intermediate pieces after one side of multiple intermediate pieces is welded, and then drive the multiple intermediate pieces to rotate after the second welding platform 4 and the second positioning plate 41 slide downwards, so as to rotate the unwelded side to the top, and then realize the welding of the unwelded side through the second welding mechanism 42. In order to ensure that the door leaf composed of multiple intermediate pieces can still be aligned with the side where the two second positioning plates 41 are close to each other after rotating 180°, the rotation axis of the rotating rod 52 of the second feeding mechanism 6 is parallel to the second positioning plate 41 and is located at the middle position between the two second positioning plates 41.

[0054] Specifically, this embodiment further includes a first leveling mechanism 7 and a second leveling mechanism 71; the first leveling mechanism 7 is located between the first welding platform 2 and the second transmission mechanism 3, and the second leveling mechanism 71 is located on one side of the second welding platform 4. An outlet plate 9 is provided on one side of the second welding platform 4 away from the second leveling mechanism 71, and the outlet plate 9 slides horizontally to push the door leaf formed by welding on the second welding platform 4 to move onto the second leveling mechanism 71.

[0055] After welding, the intermediate piece and the door leaf will both have stress deformation due to welding, and the setting of the two leveling mechanisms can level the intermediate piece and the door leaf after welding, which is convenient for subsequent positioning and processing.

[0056] Specifically, the structures of the first leveling mechanism 7 and the second leveling mechanism 71 are the same. The first leveling mechanism 7 includes a leveling platform 701 and a pressing plate 702, and the pressing plate 702 moves up and down above the leveling platform 701. Through the up and down movement of the pressing plate 702, the leveling of the intermediate piece and the door leaf can be realized.

[0057] Specifically, the movements of the first welding platform 2, the first positioning plate 21, the second positioning plate 41, and the second welding platform 4 are all driven by cylinders.

[0058] Specifically, both the first welding mechanism 22 and the second welding mechanism 42 are composed of a welding torch and a support frame. The welding torch realizes the welding of the intermediate piece and the door leaf by moving in three directions: horizontally, longitudinally, and vertically on the support frame.

[0059] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A special automatic production line for civil air defense doors, characterized by: It comprises a first welding platform (2), the first welding platform (2) is arranged horizontally, and a plurality of plate-shaped raw materials are arranged along a straight line and positioned on the first welding platform (2); A first positioning mechanism, the first positioning mechanism being arranged on the first welding platform (2) and used for positioning a plurality of plate-shaped raw materials; A first transmission mechanism (1), wherein two first transmission mechanisms (1) are provided and are respectively located on both sides of the first welding platform (2), and the two first transmission mechanisms (1) are respectively located at two ends of the arrangement direction of the plurality of plate-shaped raw materials on the first welding platform (2); A first feeding mechanism (5), wherein two first feeding mechanisms (5) are provided and correspond to the two first transmission mechanisms (1) respectively, and the first feeding mechanism (5) is used to push the plate-shaped raw material on the corresponding first transmission mechanism (1) to move onto the first welding platform (2); A first welding mechanism (22), the first welding mechanism (22) being used to weld together a plurality of plate-shaped raw materials on the first welding platform (2) to form an intermediate piece; A second welding platform (4), wherein the second welding platform (4) is arranged horizontally, and a plurality of intermediate pieces are arranged on the second welding platform (4) along its width direction and positioned on the second welding platform (4); A second positioning mechanism, the second positioning mechanism being arranged on the second welding platform (4) and used for positioning the plurality of intermediate pieces; A second transmission mechanism (3), the second transmission mechanism (3) being used to transmit the intermediate piece on the first welding platform (2) to the second welding platform (4); and a second welding mechanism (42), the second welding mechanism (42) being used for welding together a plurality of plate-shaped raw materials on the second welding platform (4) to form a door leaf; The first positioning mechanism comprises a first positioning plate (21), wherein two first positioning plates (21) are provided, the two first positioning plates (21) are arranged vertically, the length direction of the top of the first positioning plate (21) is arranged along the arrangement direction of the plurality of plate-like raw materials on the first welding platform (2), the two first positioning plates (21) are arranged in a direction perpendicular to themselves, and the two first positioning plates (21) are respectively in contact with two sides of the arrangement direction of the plurality of plate-like raw materials; The second positioning mechanism comprises a second positioning plate (41), two second positioning plates (41) are provided, the two second positioning plates (41) are vertically arranged, the length direction of the top of the second positioning plate (41) is arranged along the arrangement direction of the plurality of intermediate components on the second welding platform (4), the two second positioning plates (41) are arranged in a direction perpendicular to themselves, and the two second positioning plates (41) are respectively in contact with both sides of the arrangement direction of the plurality of intermediate components.

2. The automatic production line for civil air defense doors according to claim 1 is characterized in that: The first transmission mechanism (1) is configured as a conveyor belt, and a plurality of first dividing strips (11) arranged around the first transmission mechanism (1) are fixedly connected to the first transmission mechanism (1), and the length direction of the first dividing strips (11) is arranged along the width direction of the first transmission mechanism (1), and the transmission direction of the first transmission mechanism (1) is perpendicular to the first positioning plate (21); When the first dividing bar (11) rotates to the top of the first transmission mechanism (1), the plate-like raw material is located between two adjacent first dividing bars (11) and the transmission front end and the transmission rear end of the plate-like raw material are respectively in contact with the two first dividing bars (11).

3. The automatic production line for civil air defense doors according to claim 2 is characterized in that: The first feeding mechanism (5) comprises a feeding plate (51), the length direction of the feeding plate (51) is parallel to the conveying direction of the plate-like raw material, and the feeding plate (51) slides in a direction parallel to the length direction of the dividing strip to push the plate-like raw material between the two first dividing strips (11) to move to between the two first positioning plates (21); A fixed platform is arranged on a side of the first transmission mechanism (1) away from the first welding platform (2), and a cylinder is arranged on the first fixed platform to drive the feed plate (51) to slide.

4. The automatic production line for civil air defense doors according to claim 3 is characterized in that: The first welding platform (2) is capable of sliding in a vertical direction; The first feeding mechanism (5) further comprises a rotating rod (52), wherein the rotating rod (52) is arranged on a side of the feeding plate (51) close to the first welding platform (2), and the rotating rod (52) is rotatably connected to the feeding plate (51) and the rotating axis is parallel to the sliding direction of the feeding plate (51).

5. The automatic production line for civil air defense doors according to claim 4 is characterized in that: The second transmission mechanism (3) is configured as a conveyor belt, and the transmission direction of the second transmission mechanism (3) is horizontal and perpendicular to the transmission direction of the first transmission mechanism (1); A plurality of second dividing strips arranged around the second conveying mechanism (3) are fixedly connected to the second conveying mechanism (3); the length direction of the second dividing strips is arranged along the width direction of the second conveying mechanism (3); when the intermediate piece is pushed onto the second conveying mechanism (3), the length direction of the intermediate piece is aligned with the conveying direction of the top of the second conveying mechanism (3), and the two ends of the intermediate piece are respectively in contact with the sides of two adjacent second dividing strips that are close to each other.

6. The automatic production line for civil air defense doors according to claim 5 is characterized by: It also includes a transfer mechanism (8), which is used to push the intermediate piece that has been welded on the first welding platform (2) to move along its width direction to the second transmission mechanism (3); The transfer mechanism (8) comprises a transfer plate (81), the length direction of the transfer plate (81) is parallel to the width direction of the middle piece, and the transfer plate (81) can slide along the width direction of the middle piece to act on the side of the middle piece away from the second transmission mechanism (3) and push the middle piece to move onto the second transmission mechanism (3).

7. The automatic production line for civil air defense doors according to claim 6 is characterized in that: It also includes a second feeding mechanism (6), wherein two second feeding mechanisms (6) are provided, and the two second feeding mechanisms (6) are respectively located on a side of the second transmission mechanism (3) away from the second welding platform (4) and a side of the second welding platform (4) away from the second transmission mechanism (3), and the two second feeding mechanisms (6) are respectively located at two ends of the second positioning plate (41); The structure of the second feeding mechanism (6) is the same as that of the first feeding mechanism (5), and the second welding platform (4) can slide up and down.

8. The automatic production line for civil air defense doors according to claim 7 is characterized in that: It also includes a first leveling mechanism (7) and a second leveling mechanism (71); The first leveling mechanism (7) is located between the first welding platform (2) and the second transmission mechanism (3), the second leveling mechanism (71) is located on one side of the second welding platform (4), and a discharge plate (9) is provided on the side of the second welding platform (4) away from the second leveling mechanism (71), and the discharge plate (9) slides in a horizontal direction to push the door leaf formed by welding on the second welding platform (4) to move onto the second leveling mechanism (71).

9. The automatic production line for civil air defense doors according to claim 8 is characterized in that: The first leveling mechanism (7) and the second leveling mechanism (71) have the same structure. The first leveling mechanism (7) comprises a leveling platform (701) and a pressing plate (702). The pressing plate (702) moves up and down above the leveling platform (701).

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