Civil defense door leaf frame set to platform

Abstract

The application provides a human defense door leaf frame group platform, a rear positioning and clamping component is fixedly installed at the rear side of a base table, a plurality of middle positioning and clamping components are installed at the middle part of the base table, and a front positioning and clamping component is installed at the front side of the base table, wherein the front positioning and clamping component and the middle positioning and clamping component can be slid and locked in the transverse direction along the T-shaped groove of the base, and the front channel steel positioning and clamping device on the front positioning and clamping component, the I-shaped steel positioning block and the movable positioning and clamping device on the middle positioning and clamping component, and the rear channel steel positioning and clamping device and the channel steel movable end positioning and clamping device on the rear positioning and clamping component can be slid and locked in the longitudinal direction along the bottom plate, so that the platform can be adapted to the group of human defense door leaf frames with different sizes by adjusting the positions of the movable components, and flexible production is facilitated. Since the layout and structural design of the components are reasonable, the platform is quick and accurate in positioning, reliable in clamping and high in working efficiency during use.

Description

Technical Field

[0001] This invention relates to a civil defense door manufacturing equipment, specifically a civil defense door frame assembly platform, belonging to the field of tooling and fixture technology. Background Technology

[0002] Civil defense doors are crucial access protection equipment in civil defense engineering facilities. Steel structure civil defense doors consist of a door frame and double-leaf doors installed on the frame. The doors are constructed by welding together a door frame, side panels, and accessories. Currently, in my country, the welding of civil defense door leaves mostly employs simple manual positioning, clamping, and welding methods. Due to the large size and weight of civil defense door leaves and the numerous components requiring welding, the workload for positioning, clamping, and welding is enormous. Excessive manual operation easily leads to worker fatigue, resulting in low production efficiency. Furthermore, the weld quality from manual welding is unstable, making it difficult to control welding deformation, affecting product qualification rates, and increasing the difficulty of subsequent workpiece correction. To improve the production efficiency of civil defense door leaves and stabilize product quality, we have designed an automated welding production line for civil defense door leaves. This line employs various automated designs to replace manual operation and uses welding robots to complete the main welding work of the doors. It can also be used for the automated welding of civil defense door leaves of various sizes and specifications.

[0003] Our designed automated welding production line for civil defense doors consists of a frame assembly station, a robot welding station, and an auxiliary welding station, arranged sequentially from front to back. The civil defense door frame assembly platform of this invention is set in the frame assembly station and is used to assemble, splice, position, and clamp all the steel sections to be welded during the assembly of the civil defense door frame. Then, the entire frame is formed by manual spot welding and then transported to the subsequent robot welding station where the gantry robot system automatically performs full welding on the entire civil defense door frame. Summary of the Invention

[0004] The purpose of this invention is to provide a platform for assembling civil defense door frames. As the front-end equipment in an automated welding production line for civil defense door panels, it is used to assemble, splice, and clamp all the steel sections to be welded during the assembly of the civil defense door frame. Then, the entire frame is formed by manual spot welding on the platform. The civil defense door frame is a rectangular grid-like frame assembled and welded from multiple steel sections. The surrounding frame is constructed by splicing two horizontal channel steels and two vertical channel steels with inward-facing openings. The internal grid is divided by longitudinal and transverse splicing of long vertical H-beams and short horizontal H-beams. Figure 16 As shown.

[0005] The specific technical solution adopted in this invention is as follows:

[0006] A platform for assembling a civil defense door frame includes a rectangular platform base with multiple horizontally parallel T-slots on the platform surface. A longitudinally arranged rear positioning clamping component is fixedly installed on the rear side of the platform. Multiple longitudinally arranged intermediate positioning clamping components, capable of sliding laterally along the T-slots, are installed in the middle of the platform. The number of intermediate positioning clamping components corresponds to the number of longitudinal I-beams inside the civil defense door frame. A longitudinally arranged front positioning clamping component, capable of sliding laterally along the T-slots, is installed on the front side of the platform.

[0007] The rear positioning and clamping component has a longitudinally elongated rear fixing base plate fixedly installed on the rear side of the base platform. A channel steel fixing end positioning and clamping device is fixedly installed on the left side of the rear fixing base plate. This channel steel fixing end positioning and clamping device has a left rear support plate. Channel steel positioning baffles are located on the left and rear sides of the left rear support plate. A pneumatic top-surface clamping mechanism with a manual control handle, whose swing arm extends above the left rear support plate and whose pressure head faces downwards, is also mounted on the left side of the left rear support plate. Multiple rear channel steel positioning and clamping devices that can slide longitudinally along the plate are installed in the middle of the rear fixing base plate. Each rear channel steel positioning and clamping device has a middle and rear slide block that is slidably connected to and lockable with the rear fixing base plate. A middle and rear support plate is installed in the middle of the top surface of the middle and rear slide block, and a channel steel positioning baffle is located on the rear side of the middle and rear support plate. The middle and rear slide is equipped with a large push cylinder with the push head facing backward on the front side of the middle and rear support plate. The middle and rear slide is also equipped with a pneumatic top surface pressing mechanism with the swing arm extending above the middle and rear support plate and the pressure head facing downward on the rear side of the middle and rear support plate. The rear fixed base plate is equipped with a channel steel movable end positioning clamping device that can slide longitudinally along its body on the right side. The channel steel movable end positioning clamping device is equipped with a right rear slide that is slidably connected to and can be locked with the rear fixed base plate. The right rear support plate is installed in the middle of the top surface of the right rear slide plate. The channel steel positioning baffle is provided on the rear side of the right rear support plate. The right rear slide is also equipped with a pneumatic top surface pressing mechanism with the swing arm extending above the right rear support plate and the pressure head facing downward on the rear side of the right rear support plate. The right rear slide is equipped with a small push cylinder with the push head facing left and a manual control handle on the right side of the right rear support plate.

[0008] The intermediate positioning and clamping component has a longitudinally elongated intermediate movable base plate that can slide laterally in the middle of the base platform. The intermediate movable base plate is slidably connected to the T-slot of the base via a T-shaped slide rail on its bottom surface and is locked in position by a tension screw. A fixed positioning and clamping device is fixedly installed on the left side of the intermediate movable base plate. The fixed positioning and clamping device has a left middle support plate. A channel steel positioning baffle is provided on the left side of the left middle support plate. A pneumatic top surface clamping mechanism with a manual control handle is also mounted on the left side of the left middle support plate, with the swing arm extending above the left middle support plate and the pressure head facing downward. A left cylinder mounting position is provided on the right side of the left middle support plate. Multiple I-beam positioning blocks that can slide longitudinally along the plate are installed in the middle of the intermediate movable base plate. The bottom of the I-beam positioning blocks adopts a sliding seat structure that is slidably connected to and locked with the intermediate movable base plate. The top surface of the I-beam positioning blocks... The system includes a support platform with pry bar insertion holes and I-beam positioning bosses on its front and rear sides. A movable positioning clamping device is installed on the right side of the central movable base plate, allowing it to slide longitudinally along the plate. This device has a right-center slide block that is slidably connected to and lockable to the central movable base plate. A right-center support plate is installed in the center of the top surface of the right-center slide block. A pneumatic top-surface clamping mechanism with a swing arm extending above the right-center support plate and a downward-facing pressure head is mounted on the right side of the right-center slide block and the right-center support plate. A small push cylinder with a left-facing push head and a manual control handle is also mounted on the right side of the right-center slide block and the left-side of the right-center support plate. A right cylinder mounting position is located on the left side of the right-center slide block and the right-center support plate. In all the central positioning clamping components, several left cylinder mounting positions are equipped with large push cylinders with left-facing push heads, and several right cylinder mounting positions are equipped with large push cylinders with right-facing push heads.

[0009] Furthermore, the I-beam positioning block support platform has two I-beam positioning bosses on the left and right sides. The edges of the two adjacent I-beam positioning bosses are used to position the left and right sides of the transverse I-beam of the air-raid shelter door frame, and the front edges of the two I-beam positioning bosses are used to position the rear side of the longitudinal I-beam of the air-raid shelter door frame.

[0010] The front positioning and clamping component has a longitudinally elongated front movable base plate that can slide laterally on the front side of the base platform. The front movable base plate is slidably connected to the T-slot of the base via a T-shaped slide rail on its bottom surface and is locked in position by a tension screw. A channel steel left front end positioning and clamping device is fixedly installed on the left side of the front movable base plate. The channel steel left front end positioning and clamping device has a fixed seat. A left front support plate is installed in the middle of the top surface of the fixed seat. A large pushing cylinder with the push head facing forward is mounted on the rear side of the fixed seat. A pneumatic top surface clamping mechanism with a swing arm extending above the left front support plate and the pressure head facing downward is mounted on the front side of the fixed seat. The front side of the pallet is also equipped with a small push cylinder with a rearward push head and a manual control handle; the front movable base plate is equipped with a front channel steel positioning and clamping device that can slide longitudinally along its body at the middle and rear positions. The front channel steel positioning and clamping device is equipped with a front slide block that is slidably connected to and lockable with the front movable base plate. The front support plate is installed in the middle of the top surface of the front slide block. The front slide block is equipped with a large push cylinder with a forward push head at the rear side of the front support plate. The front slide block is equipped with a pneumatic top surface pressing mechanism with a swing arm extending above the front support plate and a downward pressure head at the front side of the front support plate. The front slide block is also equipped with a small push cylinder with a rearward push head and a manual control handle at the front side of the front support plate.

[0011] The pneumatic top-surface clamping mechanism is equipped with a swing arm driven by a clamping cylinder. The end of the swing arm has a downward-extending pressure head. When the pressure head of the pneumatic top-surface clamping mechanism presses down, it can clamp the steel section placed on the pallet from above. Furthermore, an upward-standing anti-collision baffle is also provided on the side of the pneumatic top-surface clamping mechanism to prevent damage to the mechanism when lifting or lowering workpieces.

[0012] The rear side of the base is also supported by a cylinder control module. The cylinder control module has multiple remote control handles arranged in a row. Each remote control handle synchronously controls a set of pneumatic components of the platform relative to the door frame assembly. Furthermore, the pneumatic top surface pressing mechanisms located on the front, rear, left, and right sides of the base are each equipped with a remote control handle for synchronous control. Similarly, the large push cylinders located on the front, rear, left, and right sides of the base are each equipped with a remote control handle for synchronous control, as are the small push cylinders located on the front and right sides of the base.

[0013] When assembling the air-raid shelter door frame using this platform, the front, middle, and rear positioning clamping components, arranged longitudinally on the base, work together to position and clamp all the steel sections to be welded in the air-raid shelter door frame. Since the front and middle positioning clamping components can slide laterally along the T-slot of the base and lock in place, and the front channel steel positioning clamping device on the front positioning clamping component, the I-beam positioning block and movable positioning clamping device on the middle positioning clamping component, and the rear channel steel positioning clamping device and the movable end positioning clamping device on the rear positioning clamping component can all slide longitudinally along their base plates and lock in place, this platform can adapt to the assembly of various sizes and specifications of air-raid shelter door frames by adjusting the position of each movable component, which is beneficial for flexible production. Due to the reasonable layout and structural design of each component, this platform provides fast and accurate positioning, reliable clamping, and high work efficiency during use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the platform for the door frame assembly.

[0015] Figure 2 This is a schematic diagram illustrating the assembly, splicing, positioning, and clamping of steel sections to be welded using this platform.

[0016] Figure 3 This is a schematic diagram of the base.

[0017] Figure 4 This is a schematic diagram of the rear positioning and clamping component.

[0018] Figure 5 This is a schematic diagram of a positioning and clamping device for the fixed end of a channel steel.

[0019] Figure 6 This is a schematic diagram of the positioning and clamping device for the rear channel steel.

[0020] Figure 7 This is a schematic diagram of a positioning and clamping device for the movable end of a channel steel.

[0021] Figure 8 This is a schematic diagram of the intermediate positioning and clamping component.

[0022] Figure 9 This is a schematic diagram of a fixed positioning clamping device.

[0023] Figure 10 This is a schematic diagram of an I-beam positioning block.

[0024] Figure 11 This is a schematic diagram of a movable positioning clamping device.

[0025] Figure 12 This is a schematic diagram of the front positioning and clamping component.

[0026] Figure 13 This is a schematic diagram of the positioning and clamping device for the left front end of the channel steel.

[0027] Figure 14 This is a schematic diagram of the front channel steel positioning and clamping device.

[0028] Figure 15 This is a schematic diagram of the cylinder control module.

[0029] Figure 16 This is a schematic diagram of the completed frame of the civil defense door.

[0030] In the diagram: 1-Base, 2-T-slot, 3-Rear fixed base plate, 4-Channel steel fixed end positioning and clamping device, 5-Left rear support plate, 6-Channel steel positioning baffle, 7-Pneumatic top surface pressing mechanism, 8-Rear channel steel positioning and clamping device, 9-Middle rear slide, 10-Middle rear support plate, 11-Large push cylinder, 12-Channel steel movable end positioning and clamping device, 13-Right rear slide, 14-Right rear support plate, 15-Small push cylinder, 16-Middle movable base plate, 17-Fixed positioning and clamping device, 18-Left middle support plate, 19-Left pneumatic top surface pressing mechanism, 10-Rear channel steel positioning and clamping device ... channel steel fixed end positioning and clamping device, 12-Channel steel movable end positioning and clamping device, 13-Right rear slide, 14-Right rear support plate, 15-Small push Cylinder mounting position, 20-I-beam positioning block, 21-support platform, 22-I-beam positioning boss, 23-pry bar insertion hole, 24-movable positioning clamping device, 25-right middle slide, 26-right middle support plate, 27-right cylinder mounting position, 28-front movable base plate, 29-left front end positioning clamping device of channel steel, 30-fixed seat, 31-left front support plate, 32-front channel steel positioning clamping device, 33-front slide, 34-front support plate, 35-anti-collision baffle, 36-cylinder control module, 37-cylinder remote control handle. Detailed Implementation

[0031] The invention will be further described below with reference to the accompanying drawings. In the description of the invention, the directional terms "front," "rear," "left," "right," "up," "down," "lateral," and "vertical" are based on the appendix to the specification. Figure 1 The orientations or positional relationships shown are defined only for the convenience of describing the present invention, and do not refer to a specific orientation that the device or element must have, and should not be regarded as a limitation of the present invention.

[0032] like Figure 1-3 As shown, the platform of the air defense door frame assembly is equipped with a rectangular platform base 1. The platform of the base 1 has multiple horizontally parallel T-slots 2. The rear side of the platform of the base 1 is fixedly installed with longitudinally arranged rear positioning clamping components. The middle part of the platform of the base 1 is equipped with multiple vertically arranged intermediate positioning clamping components that can slide horizontally along the T-slots 2. The number of intermediate positioning clamping components corresponds to the number of longitudinal I-beams inside the air defense door frame. The front side of the platform of the base 1 is equipped with a vertically arranged front positioning clamping component that can slide horizontally along the T-slots 2.

[0033] like Figure 4-7 As shown, the rear positioning clamping component has a longitudinally elongated rear fixed base plate 3 fixedly installed on the rear side of the base 1 platform; a channel steel fixed end positioning clamping device 4 is fixedly installed on the left side of the rear fixed base plate 3, the channel steel fixed end positioning clamping device 4 has a left rear support plate 5, the left side and rear side of the left rear support plate 5 are provided with channel steel positioning baffles 6, and the left side of the left rear support plate 5 is also equipped with a pneumatic top surface clamping mechanism 7 with a manual control handle, the swing arm extending above the left rear support plate 5 and the pressure head facing downward; multiple rear channel steel positioning clamping devices 8 that can slide longitudinally along the plate body are installed in the middle of the rear fixed base plate 3, the rear channel steel positioning clamping device 8 has a middle rear slide 9 that is slidably connected to and lockable with the rear fixed base plate 3, a middle rear support plate 10 is installed in the middle of the top surface of the middle rear slide 9, and a channel steel positioning baffle 6 is provided on the rear side of the middle rear support plate 10. A large push cylinder 11 with its push head facing backward is mounted on the front side of the rear support plate 10. A pneumatic top surface pressing mechanism 7 with its swing arm extending above the middle rear support plate 10 and its pressure head facing downward is also mounted on the rear side of the middle rear slide 9. A channel steel movable end positioning clamping device 12 that can slide longitudinally along its body is installed on the right side of the rear fixed base plate 3. The channel steel movable end positioning clamping device 12 is provided with a right rear slide 13 that is slidably connected to and can be locked with the rear fixed base plate 3. A right rear support plate 14 is installed in the middle of the top surface of the right rear slide 13. A channel steel positioning baffle 6 is provided on the rear side of the right rear support plate 14. A pneumatic top surface pressing mechanism 7 with its swing arm extending above the right rear support plate 14 and its pressure head facing downward is also mounted on the rear side of the right rear slide 13. A small push cylinder 15 with its push head facing left and a manual control handle is mounted on the right side of the right rear support plate 14.

[0034] like Figure 8-11As shown, the intermediate positioning and clamping component is provided with a longitudinally elongated intermediate movable base plate 16 that can slide laterally in the middle of the platform of the base 1. The intermediate movable base plate 16 is slidably connected to the T-shaped groove 2 of the base 1 via a T-shaped slide rail on its bottom surface and is locked in position by a tension screw. A fixed positioning and clamping device 17 is fixedly provided on the left side of the intermediate movable base plate 16. The fixed positioning and clamping device 17 is provided with a left middle support plate 18. A channel steel positioning baffle 6 is provided on the left side of the left middle support plate 18. A swing arm is also mounted on the left side of the left middle support plate 18 and extends to the left middle support plate 18. A pneumatic top-surface pressing mechanism 7 with a downward-facing pressure head and a manual control handle is provided. A left cylinder mounting position 19 is located on the right side of the left-middle support plate 18. Multiple I-beam positioning blocks 20, which can slide longitudinally along the plate, are installed in the middle of the movable base plate 16. The bottom of each I-beam positioning block 20 adopts a sliding seat structure that is slidably connected to and lockable with the movable base plate 16. A support platform 21 is provided on the top surface of each I-beam positioning block 20. Pry bar insertion holes 23 and I-beam positioning bosses 22 are respectively provided on the front and rear sides of the support platform 21. The I-beam positioning bosses 22 have left and right... Two I-beam positioning bosses 22 are used to position the left and right sides of the transverse I-beams of the air-raid shelter door frame, with the front edges of the two I-beam positioning bosses 22 positioning the rear side of the longitudinal I-beams of the air-raid shelter door frame. A movable positioning clamping device 24, which can slide longitudinally along the middle movable base plate 16, is installed on the right side of the middle movable base plate 16. The movable positioning clamping device 24 has a right middle slide block 25 that is slidably connected to and lockable with the middle movable base plate 16. A right middle support plate 26 is installed in the center of the top surface of the right middle slide block 25. The slide block 25 is equipped with a pneumatic top surface clamping mechanism 7 with a swing arm extending above the right middle support plate 26 and the pressure head facing downward on the right side of the right middle support plate 26. The right middle slide block 25 is also equipped with a small push cylinder 15 with the push head facing left and a manual control handle on the right side of the right middle support plate 26. The right middle slide block 25 is equipped with a right cylinder mounting position 27 on the left side of the right middle support plate 26. Among all the intermediate positioning and clamping components, several left cylinder mounting positions 19 are equipped with large push cylinders 11 with the push head facing left, and several right cylinder mounting positions 27 are equipped with large push cylinders 11 with the push head facing right.

[0035] like Figure 12-14As shown, the front positioning and clamping component is provided with a longitudinally elongated front movable base plate 28 that can slide laterally on the front side of the base 1. The front movable base plate 28 is slidably connected to the T-shaped groove 2 of the base 1 via a T-shaped slide rail on its bottom surface and is locked in position by a tension screw. A channel steel left front end positioning and clamping device 29 is fixedly installed on the left side of the front movable base plate 28. The channel steel left front end positioning and clamping device 29 is provided with a fixed seat 30. A left front support plate 31 is installed in the middle of the top surface of the fixed seat 30. A large pushing cylinder 11 with the push head facing forward is mounted on the rear side of the left front support plate 31 on the fixed seat 30. A pneumatic top surface clamping mechanism 7 with the swing arm extending above the left front support plate 31 and the pressure head facing downward is mounted on the front side of the fixed seat 30 on the left front support plate 31. A small push cylinder 15 with a rearward push head and a manual control handle is also mounted on the front side of the pallet 31; a front channel steel positioning and clamping device 32 that can slide longitudinally along its body is installed in the middle and right side of the front movable base plate 28. The front channel steel positioning and clamping device 32 is provided with a front slide block 33 that is slidably connected to and lockable with the front movable base plate 28. A front pallet 34 is mounted in the middle of the top surface of the front slide block 33. A large push cylinder 11 with a forward push head is mounted on the rear side of the front slide block 34. A pneumatic top surface pressing mechanism 7 with a swing arm extending above the front pallet 34 and a downward pressure head is mounted on the front side of the front slide block 33. A small push cylinder 15 with a rearward push head and a manual control handle is also mounted on the front side of the front slide block 33.

[0036] The pneumatic top-surface clamping mechanism 7 is equipped with a swing arm driven by a clamping cylinder. The end of the swing arm has a downward-extending pressure head. When the pressure head of the pneumatic top-surface clamping mechanism 7 presses down, it can clamp the steel section placed on the pallet from the top. The pneumatic top-surface clamping mechanism 7 is also equipped with an upward-standing anti-collision baffle 35 on the side to prevent damage to the pneumatic top-surface clamping mechanism 7 when lifting or placing workpieces.

[0037] like Figure 1 and Figure 15 As shown, a cylinder control module 36 is mounted on the rear side of the base 1 via a bracket. The cylinder control module 36 has multiple remote control handles 37 arranged in a row. Each remote control handle 37 synchronously controls a set of pneumatic components of the platform relative to the door frame assembly. Furthermore, each of the pneumatic top surface pressing mechanisms 7 located on the front, rear, left, and right sides of the base 1 is synchronously controlled by a remote control handle 37. Similarly, each of the large push cylinders 11 located on the front, rear, left, and right sides of the base 1 is synchronously controlled by a remote control handle 37, and each of the small push cylinders 15 located on the front and right sides of the base 1 is synchronously controlled by a remote control handle 37.

[0038] The method for assembling the entire frame of a fire-fighting door using the platform assembly of the fire-fighting door leaf assembly includes the following steps:

[0039] (1) According to the size and specifications of the air defense door frame and the longitudinal and transverse positions of the internal I-beams, adjust and lock the positions of the front positioning clamping component and the middle positioning clamping component on the base, adjust and lock the position of the front channel steel positioning clamping device 32 on the front positioning clamping component, adjust and lock the positions of the I-beam positioning block 20 and the movable positioning clamping device 24 on the middle positioning clamping component, and adjust and lock the positions of the rear channel steel positioning clamping device 8 and the channel steel movable end positioning clamping device 12 on the rear positioning clamping component.

[0040] (2) Place the left transverse channel steel. First, manually control the small push cylinder 15 of the positioning clamping device 29 at the left front end of the channel steel to push backward, so that the left transverse channel steel presses backward on the channel steel positioning baffle 6 on the rear side to achieve transverse positioning. After positioning is completed, manually retract the small push cylinder 15. Then, operate the large push cylinder 11 on the left side of the base 1 to push to the left at the same time, so that the left transverse channel steel presses to the left on the channel steel positioning baffle 6 on the left side to achieve longitudinal positioning.

[0041] (3) Place the rear longitudinal channel steel. First, manually control the small push cylinder 15 of the channel steel movable end positioning clamping device 12 to push to the left, so that the rear longitudinal channel steel presses to the left on the channel steel positioning baffle 6 on the left side to achieve longitudinal positioning. After positioning, manually retract the small push cylinder 15. Then, operate the large push cylinder 11 on the rear side of the base 1 to push backward at the same time, so that the rear longitudinal channel steel presses to the rear channel steel positioning baffle 6 on the rear side to achieve transverse positioning. Then, operate the pneumatic top surface pressing mechanism 7 on the rear side of the base 1 to press down at the same time to clamp the rear longitudinal channel steel. Then, manually control the pneumatic top surface pressing mechanism 7 of the channel steel fixed end positioning clamping device 4 to press down, and clamp the rear end of the left transverse channel steel and the left end of the rear longitudinal channel steel at the same time.

[0042] (4) Place the first set of transverse H-beams and the first longitudinal H-beam on the rear side. First, manually control the small push cylinder 15 of the movable positioning clamping device 24 to push to the left, so that the longitudinal H-beam presses against the inner edge of the left transverse channel steel to achieve longitudinal positioning. After positioning, manually retract the small push cylinder 15. Then, insert a pry bar into the pry bar insertion hole 23 of each H-beam positioning block 20 and pry the longitudinal H-beam to move backward, so that the longitudinal H-beam is pressed against the first set of transverse H-beams to achieve transverse positioning. Then, manually control the pneumatic top surface pressing mechanism 7 of the fixed positioning clamping device 17 to press down, and clamp the left end of the left transverse channel steel and the first longitudinal H-beam at the same time.

[0043] (5) Following the method in step (4), place and position the subsequent transverse and longitudinal I-beams sequentially from back to front.

[0044] (6) Place the first set of horizontal I-beams and front longitudinal channel steels. First, operate the large push cylinder 11 on the front side of the base 1 to extend forward at the same time to position the inner edge of the front longitudinal channel steel. Then, operate the small push cylinder 15 on the front side of the base 1 to push backward at the same time to achieve horizontal positioning of the front longitudinal channel steel. After positioning is completed, manually retract the small push cylinder 15.

[0045] (7) Place the right transverse channel steel. First, manually control the small push cylinder 15 of the right front channel steel positioning clamping device 32 to push it backward, so that the right transverse channel steel is pressed backward onto the channel steel positioning baffle 6 on the rear side to achieve transverse positioning. After positioning, manually retract the small push cylinder 15. Simultaneously extend the large push cylinder 11 on the right side of the base 1 to the right to position the inner edge of the right transverse channel steel. Then, simultaneously push the small push cylinder 15 on the right side of the base 1 to the left to achieve longitudinal positioning of the right transverse channel steel and the front longitudinal channel steel. Then, simultaneously press down the pneumatic top surface pressing mechanism 7 on the right side of the base 1 to clamp the right end of the right transverse channel steel and the longitudinal I-beam. Then, simultaneously press down the pneumatic top surface pressing mechanism 7 on the front side of the base 1 to clamp the front longitudinal channel steel. This completes the positioning and clamping of all the steel sections to be welded.

[0046] (8) On this platform, the positioned and clamped steel sections are spliced ​​into an integral frame by manual spot welding.

[0047] The above illustrations are merely typical embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A platform for assembling the frame of a civil defense door, characterized in that, The air-raid shelter door frame assembly platform is equipped with a rectangular platform base, and multiple horizontally parallel T-slots are opened on the platform surface of the base; a longitudinally arranged rear positioning clamping component is fixedly installed on the rear side of the platform surface; multiple longitudinally arranged intermediate positioning clamping components are installed in the middle of the platform surface, which can slide laterally along the T-slots as a whole; the number of intermediate positioning clamping components corresponds to the number of longitudinal I-beams inside the air-raid shelter door frame; and a longitudinally arranged front positioning clamping component is installed on the front side of the platform surface, which can slide laterally along the T-slots as a whole. The rear positioning and clamping component has a longitudinally elongated rear fixing base plate fixedly installed on the rear side of the base platform. A channel steel fixing end positioning and clamping device is fixedly installed on the left side of the rear fixing base plate. This channel steel fixing end positioning and clamping device has a left rear support plate. Channel steel positioning baffles are located on the left and rear sides of the left rear support plate. A pneumatic top-surface clamping mechanism with a manual control handle, whose swing arm extends above the left rear support plate and whose pressure head faces downwards, is also mounted on the left side of the left rear support plate. Multiple rear channel steel positioning and clamping devices that can slide longitudinally along the plate are installed in the middle of the rear fixing base plate. Each rear channel steel positioning and clamping device has a middle and rear slide block that is slidably connected to and lockable with the rear fixing base plate. A middle and rear support plate is installed in the middle of the top surface of the middle and rear slide block, and a channel steel positioning baffle is located on the rear side of the middle and rear support plate. The middle and rear slide is equipped with a large push cylinder with the push head facing backward on the front side of the middle and rear support plate. The middle and rear slide is also equipped with a pneumatic top surface pressing mechanism with the swing arm extending above the middle and rear support plate and the pressure head facing downward on the rear side of the middle and rear support plate. The rear fixed base plate is equipped with a channel steel movable end positioning clamping device that can slide along its longitudinal direction on the right side. The channel steel movable end positioning clamping device is equipped with a right rear slide that is slidably connected to and can be locked with the rear fixed base plate. The right rear support plate is installed in the middle of the top surface of the right rear slide. The channel steel positioning baffle is provided on the rear side of the right rear support plate. The right rear slide is also equipped with a pneumatic top surface pressing mechanism with the swing arm extending above the right rear support plate and the pressure head facing downward on the rear side of the right rear support plate. The right rear slide is equipped with a small push cylinder with the push head facing left and a manual control handle on the right side of the right rear support plate. The intermediate positioning and clamping component has a longitudinally elongated intermediate movable base plate that can slide laterally in the middle of the base platform. The intermediate movable base plate is slidably connected to the T-slot of the base via a T-shaped slide rail on its bottom surface and is locked in position by a tension screw. A fixed positioning and clamping device is fixedly installed on the left side of the intermediate movable base plate. The fixed positioning and clamping device has a left middle support plate. A channel steel positioning baffle is provided on the left side of the left middle support plate. A pneumatic top surface clamping mechanism with a manual control handle is also mounted on the left side of the left middle support plate, with the swing arm extending above the left middle support plate and the pressure head facing downward. A left cylinder mounting position is provided on the right side of the left middle support plate. Multiple I-beam positioning blocks that can slide longitudinally along the plate are installed in the middle of the intermediate movable base plate. The bottom of the I-beam positioning blocks adopts a sliding seat structure that is slidably connected to and locked with the intermediate movable base plate. The top surface of the I-beam positioning blocks... The system includes a support platform with pry bar insertion holes and I-beam positioning bosses on its front and rear sides. A movable positioning clamping device is installed on the right side of the central movable base plate, allowing it to slide longitudinally along the plate. This device has a right-center slide block that is slidably connected to and lockable to the central movable base plate. A right-center support plate is installed in the center of the top surface of the right-center slide block. A pneumatic top-surface clamping mechanism with a swing arm extending above the right-center support plate and a downward-facing pressure head is mounted on the right side of the right-center slide block and the right-center support plate. A small push cylinder with a left-facing push head and a manual control handle is also mounted on the right side of the right-center slide block and the left-side of the right-center support plate. A right cylinder mounting position is located on the left side of the right-center slide block and the right-center support plate. In all the central positioning clamping components, several left cylinder mounting positions are equipped with large push cylinders with left-facing push heads, and several right cylinder mounting positions are equipped with large push cylinders with right-facing push heads. The front positioning and clamping component has a longitudinally elongated front movable base plate that can slide laterally on the front side of the base platform. The front movable base plate is slidably connected to the T-slot of the base via a T-shaped slide rail on its bottom surface and is locked in position by a tension screw. A channel steel left front end positioning and clamping device is fixedly installed on the left side of the front movable base plate. The channel steel left front end positioning and clamping device has a fixed seat. A left front support plate is installed in the middle of the top surface of the fixed seat. A large pushing cylinder with the push head facing forward is mounted on the rear side of the fixed seat. A pneumatic top surface clamping mechanism with a swing arm extending above the left front support plate and the pressure head facing downward is mounted on the front side of the fixed seat. The front side of the pallet is also equipped with a small push cylinder with a rearward push head and a manual control handle; the front movable base plate is equipped with a front channel steel positioning and clamping device that can slide along its longitudinal direction at the middle and rear positions. The front channel steel positioning and clamping device is equipped with a front slide block that is slidably connected to the front movable base plate and can be locked. The front support plate is installed in the middle of the top surface of the front slide block. The front slide block is equipped with a large push cylinder with a forward push head at the rear side of the front support plate. The front slide block is equipped with a pneumatic top surface pressing mechanism with a swing arm extending above the front support plate and a downward pressure head at the front side of the front support plate. The front slide block is also equipped with a small push cylinder with a rearward push head and a manual control handle at the front side of the front support plate. The I-beam positioning block support platform has two I-beam positioning bosses on the left and right sides. The edges of the two adjacent I-beam positioning bosses are used to position the left and right sides of the horizontal I-beam of the air-raid shelter door frame, and the front edges of the two I-beam positioning bosses are used to position the rear side of the vertical I-beam of the air-raid shelter door frame.

2. The air-raid shelter door frame assembly platform according to claim 1, characterized in that, The pneumatic top surface clamping mechanism is equipped with a swing arm driven by a clamping cylinder, and the end of the swing arm is equipped with a downwardly extending pressure head.

3. The air-raid shelter door frame assembly platform according to claim 1, characterized in that, The pneumatic top surface pressing mechanism is also provided with an upward-standing anti-collision baffle on its side.

4. The air-raid shelter door frame assembly platform according to claim 1, characterized in that, The rear side of the base is also equipped with a cylinder control module via a bracket. The cylinder control module has multiple remote control handles for cylinders arranged in a row. Each remote control handle for cylinders synchronously controls a set of pneumatic components of the platform connected to the door frame assembly.

5. The air-raid shelter door frame assembly platform according to claim 4, characterized in that, Each of the pneumatic top surface pressing mechanisms located on the front, rear, left, and right sides of the base is equipped with a remote control handle for synchronous control. Each of the large push cylinders located on the front, rear, left, and right sides of the base is equipped with a remote control handle for synchronous control. Each of the small push cylinders located on the front and right sides of the base is equipped with a remote control handle for synchronous control.

6. A method for splicing a civil defense door frame assembly to a platform assembly using the civil defense door frame assembly as described in any one of claims 1-5, characterized in that, Includes the following steps: (1) According to the size and specifications of the air defense door frame and the longitudinal and transverse positions of the internal I-beams, adjust and lock the positions of the front positioning clamping component and the middle positioning clamping component on the base, adjust and lock the position of the front channel steel positioning clamping device on the front positioning clamping component, adjust and lock the position of the I-beam positioning block and the movable positioning clamping device on the middle positioning clamping component, and adjust and lock the position of the rear channel steel positioning clamping device and the channel steel movable end positioning clamping device on the rear positioning clamping component. (2) Place the left transverse channel steel. First, manually control the small push cylinder of the positioning clamping device at the left front end of the channel steel to push backward, so that the left transverse channel steel presses backward against the channel steel positioning baffle on the rear side to achieve transverse positioning. After positioning is completed, manually retract the small push cylinder. Then, operate the large push cylinder on the left side of the base to push to the left at the same time, so that the left transverse channel steel presses to the left against the channel steel positioning baffle on the left side to achieve longitudinal positioning. (3) Place the rear longitudinal channel steel. First, manually control the small push cylinder of the channel steel movable end positioning clamping device to push to the left, so that the rear longitudinal channel steel presses to the left on the channel steel positioning baffle on the left side to achieve longitudinal positioning. After positioning, manually retract the small push cylinder. Then, operate the large push cylinder on the rear side of the base to push backward at the same time, so that the rear longitudinal channel steel presses backward on the channel steel positioning baffle on the rear side to achieve transverse positioning. Then, operate the pneumatic top surface pressing mechanism on the rear side of the base to press down at the same time to clamp the rear longitudinal channel steel. Then, manually control the pneumatic top surface pressing mechanism of the channel steel fixed end positioning clamping device to press down, and clamp the rear end of the left transverse channel steel and the left end of the rear longitudinal channel steel at the same time. (4) Place the first set of transverse H-beams and the first longitudinal H-beam on the rear side. First, manually control the small push cylinder of the movable positioning clamping device to push to the left, so that the longitudinal H-beam presses against the inner edge of the left transverse channel steel to achieve longitudinal positioning. After positioning, manually retract the small push cylinder. Then, insert a pry bar into the pry bar insertion hole of each H-beam positioning block and pry the longitudinal H-beam to move backward, so that the longitudinal H-beam is pressed against the first set of transverse H-beams to achieve transverse positioning. Then, manually control the pneumatic top surface pressing mechanism of the fixed positioning clamping device to press down, and clamp the left end of the left transverse channel steel and the first longitudinal H-beam at the same time. (5) Following the method in step (4), place and position the subsequent transverse and longitudinal I-beams sequentially from back to front; (6) Place the first set of horizontal I-beams and front longitudinal channel steels. First, operate the large push cylinder on the front of the base to extend forward at the same time to position the inner edge of the front longitudinal channel steel. Then, operate the small push cylinder on the front of the base to push backward at the same time to achieve horizontal positioning of the front longitudinal channel steel. After positioning is completed, manually retract the small push cylinder. (7) Place the right transverse channel steel. First, manually control the small push cylinder of the front channel steel positioning and clamping device on the right side to push backward, so that the right transverse channel steel is pressed backward against the channel steel positioning baffle on the rear side to achieve transverse positioning. After positioning, manually retract the small push cylinder. Simultaneously extend the large push cylinder on the right side of the base to position the inner edge of the right transverse channel steel. Then, simultaneously push the small push cylinder on the right side of the base 1 to the left to achieve longitudinal positioning of the right transverse channel steel and the front longitudinal channel steel. Then, simultaneously press down the pneumatic top surface pressing mechanism on the right side of the base to clamp the right end of the right transverse channel steel and the longitudinal I-beam. Then, simultaneously press down the pneumatic top surface pressing mechanism on the front side of the base to clamp the front longitudinal channel steel. This completes the positioning and clamping of all the steel sections to be welded. (8) On this platform, the positioned and clamped steel sections are spliced ​​into an integral frame by manual spot welding.

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