One-way linear welding production line for civil air defense steel structure door leaf

Abstract

The present invention discloses a unidirectional linear welding production line for a door leaf of a civil air defense steel structure, including a raw material station, an assembly station, an intermediate buffer station, an automatic welding station, a material unloading buffer station and a finished product station arranged in sequence along the feeding direction of the bottom plate. The raw material station includes a plate placing area, a first material rack, a second material rack, a third material rack, a fourth material rack and a first hoisting manipulator; the assembly station includes a first lifting roller mechanism, a first lifting device, an assembly tooling platform, an assembly positioning mechanism and an assembly blocking and limiting mechanism; the intermediate buffer station includes a first roller conveying mechanism; the automatic welding station includes a second lifting roller mechanism, a second lifting device, a welding tooling platform, a welding device and a welding positioning device; the material unloading buffer station includes a second roller conveying mechanism; and the finished product station includes a finished product rack and a second hoisting manipulator. The number of manual welding operations is simplified and the welding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of production equipment for steel structure civil air defense door leaves, and in particular to a one-way linear welding production line for civil air defense steel structure door leaves. Background Art

[0002] There are two structures of civil air defense door panels, namely reinforced concrete structure and steel structure. Steel structure civil air defense doors are mainly made of channel steel, I-beams and plates, and mainly require multiple workers to cooperate in welding the channel steel, I-beams and plates. At present, in the production process of civil air defense door panels, manual welding has unstable weld quality due to welding technology errors. The fatigue caused by long-term manual welding reduces the quality of civil air defense door panel welding, and weld rework occurs. Before welding, the operator needs to adjust the position of the profiles and plates. The profiles and plates are heavy and inconvenient to adjust. The current profiles and plates are placed in a messy manner on site, which is not convenient for the next step of the process. Summary of the invention

[0003] The purpose of the present invention is to provide a one-way linear welding production line for civil air defense steel structure door leaves to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a one-way linear welding production line for a civil air defense steel structure door leaf, wherein the steel structure door leaf comprises a bottom plate, an outer frame, a plurality of longitudinal I-beam groups and a plurality of transverse I-beams, longitudinal I-beam groups are evenly spaced in the outer frame, the transverse I-beams are arranged between two groups of longitudinal I-beam groups, the longitudinal I-beam groups comprise longitudinal I-beams evenly spaced along the length direction of the transverse I-beams, the outer frame comprises a U-shaped body and a channel steel, the U-shaped body and the channel steel are fixedly connected to form a rectangular frame, the U-shaped body comprises three channel steels connected in sequence, including a raw material station, a grouping station, an intermediate buffer station, an automatic welding station, a material unloading buffer station and a finished product station arranged in sequence along the feeding direction of the bottom plate;

[0005] The raw material station includes a plate placing area for storing bottom plates, a first material rack for storing longitudinal I-beams, a second material rack for storing transverse I-beams, a third material rack for storing channel steels, a fourth material rack for storing channel steels, and a first lifting manipulator;

[0006] The assembly station includes a first lifting roller mechanism, a first lifting device for driving the first lifting roller mechanism to lift, an assembly tooling platform for supporting the bottom plate, an assembly positioning mechanism and an assembly blocking and limiting mechanism, a first through hole for the first lifting roller mechanism to pass through is provided on the assembly tooling platform, an assembly blocking and limiting mechanism for limiting and blocking the bottom plate is provided on the front side of the assembly positioning mechanism, an assembly positioning mechanism is provided on the assembly tooling platform, the assembly positioning mechanism includes two bottom plate positioning devices for positioning the bottom plate, and a profile positioning device for positioning the longitudinal I-beam, and the two bottom plate positioning devices can be respectively moved along a straight line and are arranged on the assembly On the tooling platform, two bottom plate positioning devices are respectively arranged on the two bottom plate positioning devices, the profile positioning device can be arranged on the tooling platform in a straight line, the motion trajectory of the profile positioning device is perpendicular to the motion trajectory of the bottom plate positioning device, and the motion trajectory of the profile positioning device is consistent with the feeding direction along the bottom plate, the longitudinal weld between the longitudinal I-beam and the transverse I-beam is fixedly connected by manual full welding, the horizontal weld between the longitudinal I-beam and the transverse I-beam is fixedly connected by manual spot welding, and the longitudinal I-beam, transverse I-beam, channel steel and channel steel are respectively fixedly arranged on the bottom plate by manual spot welding;

[0007] The intermediate buffer station includes a first roller conveying mechanism for temporarily storing the workpiece after preliminary welding;

[0008] The automatic welding station comprises a second lifting roller mechanism, a second lifting device for driving the second lifting roller mechanism to lift, a welding tooling platform, a welding device and a welding positioning device, the welding tooling platform is provided with a second through hole for the second lifting roller mechanism to pass through, welding devices are provided on both sides of the welding tooling platform, and a welding positioning device is provided on the welding tooling platform for full welding processing of the workpiece that has completed preliminary welding;

[0009] The material unloading and caching station includes a second roller conveying mechanism for temporarily storing the workpiece after full welding processing;

[0010] The finished product station includes a finished product rack and a second lifting manipulator.

[0011] Furthermore, the welding device comprises:

[0012] Welding robots for full welding of welds;

[0013] C-type support frame, used to support the welding robot;

[0014] The wire feeder is arranged on the side of the C-shaped support frame and is used to supply welding wire to the welding robot;

[0015] The wire supply reel is arranged at the upper end of one side surface of the C-shaped support frame and is used for storing welding wire.

[0016] Furthermore, the C-shaped support frame comprises:

[0017] A linear slide, on which a moving platform is provided, is used to drive the moving platform to move linearly back and forth;

[0018] A column is fixedly arranged on the moving platform, a mounting groove is arranged at the upper end of the column, and a rotating motor is arranged at the upper end of the side surface of the column;

[0019] A rotating arm, the welding robot is arranged at one end of the rotating arm, and a rotating shaft is arranged at the other end of the rotating arm, and the rotating shaft is rotatably arranged in the mounting groove;

[0020] A gear ring, fixedly arranged on the upper end of the rotating shaft;

[0021] A driving gear, wherein the rotating motor is connected to the ring gear through the driving gear.

[0022] Furthermore, the bottom plate positioning device comprises:

[0023] Positioning strip, the positioning strip is embedded in the upper surface of the assembly tooling platform, the length direction of the positioning strip is perpendicular to the feeding direction, a number of plug holes are opened on the positioning strip corresponding to the specifications of the civil air defense door, and the upper surface of the positioning strip is marked with positioning numbers and specification parameters on one side of the plug hole;

[0024] The limit block is movably arranged on the upper surface of the assembly tooling platform, and a positioning through hole is provided on the upper surface corresponding to the plug hole, and an observation port is opened at the position of the limit block corresponding to the positioning number and specification parameter;

[0025] Positioning pin, the limit block is connected to the positioning bar through the positioning pin.

[0026] Furthermore, the profile positioning device comprises

[0027] The positioning device bracket includes a guide frame, a profile positioning seat and a profile positioning pin. The guide frame is provided with a plurality of profile positioning seats. The guide frame and the profile positioning seat are provided with through holes for the positioning pin to pass through.

[0028] A gantry frame is movably arranged on the upper surface of the assembly tooling platform, the gantry frame is used to fix the guide frame, and the gantry frame is connected to the positioning bracket through a positioning pin;

[0029] The profile positioning unit includes a profile positioning plate. The positioning unit is fixedly arranged at the bottom of the positioning bracket and the plane where the positioning plate is located is arranged parallel to the longitudinal I-beam.

[0030] Furthermore, the assembly blocking limit mechanism includes an assembly blocking block, an assembly blocking pin and a handle ring, a handle ring is fixed on the upper surface of the assembly blocking block, a assembly blocking pin is fixed on the lower surface of the assembly blocking block, an assembly blocking slot matching the assembly blocking pin is opened on the assembly tooling platform, and the assembly blocking block is inclined away from the side of the welding tooling platform.

[0031] Further, the welding positioning device comprises:

[0032] A welding positioning unit, the welding positioning unit comprising a welding positioning plate;

[0033] A welding positioning support frame is used to fix the welding positioning unit, and the welding positioning support frame is movably arranged on the welding tooling platform;

[0034] The welding blocking and limiting mechanism is arranged on the front side of the welding tooling platform and is used to limit and block the workpiece;

[0035] The driving unit includes a driving cylinder which is fixedly arranged on a column of the C-shaped support frame, and a piston rod of the driving cylinder is fixedly connected to the welding positioning support frame.

[0036] Furthermore, the welding blocking limit mechanism includes a welding blocking block, a welding blocking pin and a handle ring, the welding blocking block is provided with a welding blocking through hole for the welding blocking pin to pass through, the welding tooling platform is provided with a welding blocking socket matching the welding blocking pin, the welding tooling platform is provided with a welding blocking groove matching the welding blocking block, and the side of the welding blocking block away from the welding tooling platform is perpendicular to the horizontal plane.

[0037] The present invention also provides a method for processing a steel structure door leaf, comprising: step one, manually hoisting the required base plate onto the assembly tooling platform through auxiliary machinery; step two, using the base plate positioning device on the assembly tooling platform to complete the positioning and fixing of the base plate; step three, the operator first hoists the channel steel onto the base plate through the auxiliary machinery, completes the positioning and spot welds the base plate and the channel steel to fix them; step four, the operator then hoists the longitudinal I-beam onto the base plate through the auxiliary machinery, positions the longitudinal I-beam to form a group of longitudinal I-beam groups, and spot welds the base plate and the longitudinal I-beam to fix them; step five, after placing a group of longitudinal I-beam groups, the operator then hoists the transverse I-beam onto the base plate through the auxiliary machinery, positions the transverse I-beam, spot welds the base plate and the transverse I-beam to fix them, and fixes the longitudinal weld between the longitudinal I-beam and the transverse I-beam by manual full welding; step six, the operator uses the auxiliary machinery to fix another group of longitudinal I-beams The steel group is hoisted onto the bottom plate, and another group of longitudinal I-beams is positioned on the bottom plate and then spot welded and fixed. The longitudinal welds between the longitudinal I-beams and the transverse I-beams of the other group of longitudinal I-beams are fixed by manual full welding; step seven, loop step five and step six; step eight, spot weld and fix the transverse welds between each longitudinal I-beam and transverse I-beam; step nine, hoist the groove steel onto the bottom plate through auxiliary machinery, position the groove steel and weld and fix it; step ten, transfer the assembled workpiece to the intermediate buffer station; step eleven, transfer the workpiece on the intermediate buffer station to the automatic welding station; step twelve, after the workpiece arrives at the welding tooling platform on the automatic welding station, start the welding robot, and the welding robot fully welds the workpiece according to the pre-set trajectory; step thirteen, transfer the fully welded workpiece to the unloading buffer station; step fourteen, hoist the workpiece on the unloading buffer station to the finished product area through auxiliary machinery.

[0038] The beneficial effects of the present invention are: the civil air defense door frame is assembled on the assembly tooling platform without the need to fully weld all welds, thereby reducing the requirements for some welders. The welds of the civil air defense door leaf are fully welded by a welding robot, thereby simplifying the number of manual welding times and improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0040] Figure 1 A schematic structural diagram of a one-way linear welding production line for a civil air defense steel structure door leaf provided in one embodiment of the present invention;

[0041] Figure 2 A partial enlarged view of a one-way linear welding production line for a civil air defense steel structure door leaf provided in one embodiment of the present invention;

[0042] Figure 3A partially enlarged view of the one-way linear welding production line for civil air defense steel structure door leaves provided in one embodiment of the present invention.

[0043] Markings in the figure: raw material station 1, assembly station 2, intermediate buffer station 3, automatic welding station 4, unloading buffer station 5, assembly tooling platform 21, first lifting roller mechanism 22, assembly positioning mechanism 23, assembly blocking and limiting mechanism 24, welding tooling platform 41, second lifting roller mechanism 42, welding device 43, welding positioning device 44, welding blocking and limiting mechanism 45. DETAILED DESCRIPTION

[0044] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0046] In the present invention, unless otherwise stated, directional words such as "up, down, left, right" generally refer to Figure 1 "Inside and outside" refer to the inside and outside of a specific outline. "Far and near" refer to the far and near relative to a certain component.

[0047] like Figure 1-Figure 3 As shown in, a one-way linear welding production line 43 for civil air defense steel structure door leafs provided by an embodiment of the present invention, the steel structure door leaf comprises a bottom plate, an outer frame, a plurality of longitudinal I-beam groups and a plurality of transverse I-beams, longitudinal I-beam groups are evenly spaced in the outer frame, the transverse I-beams are arranged between two groups of longitudinal I-beam groups, the longitudinal I-beam groups comprise longitudinal I-beams evenly spaced along the length direction of the transverse I-beams, the outer frame comprises a U-shaped body and a channel steel, the U-shaped body and the channel steel are fixedly connected to form a rectangular frame, the U-shaped body comprises three channel steels connected in sequence, including a raw material station 1, an assembly station 2, an intermediate buffer station 3, an automatic welding station 4, a material unloading buffer station 5 and a finished product station arranged in sequence along the feeding direction of the bottom plate;

[0048] The raw material station 1 includes a plate placing area for storing bottom plates, a first material rack for storing longitudinal I-beams, a second material rack for storing transverse I-beams, a third material rack for storing channel steels, a fourth material rack for storing channel steels, and a first lifting manipulator;

[0049] The assembly station 2 includes a first lifting roller mechanism 22, a first lifting device for driving the first lifting roller mechanism 22 to lift, an assembly tooling platform 21 for supporting the bottom plate, an assembly positioning mechanism 23 and an assembly blocking and limiting mechanism 24. The assembly tooling platform 21 is provided with a first through hole for the first lifting roller mechanism 22 to pass through, and the front side of the assembly positioning mechanism 23 is provided with an assembly blocking and limiting mechanism 24 for limiting and blocking the bottom plate. The assembly tooling platform 21 is provided with an assembly positioning mechanism 23, and the assembly positioning mechanism 23 includes two bottom plate positioning devices for positioning the bottom plate and a profile positioning device for positioning the longitudinal I-beam. The two bottom plate positioning devices can respectively The device is arranged on the assembly tooling platform 21 for linear movement, and two bottom plate positioning devices are arranged on the two bottom plate positioning devices respectively. The profile positioning device is arranged on the assembly tooling platform 21 for linear movement, and the motion trajectory of the profile positioning device is perpendicular to the motion trajectory of the bottom plate positioning device. The motion trajectory of the profile positioning device is consistent with the feeding direction along the bottom plate. The longitudinal weld between the longitudinal I-beam and the transverse I-beam is fixedly connected by manual full welding, and the horizontal weld between the longitudinal I-beam and the transverse I-beam is fixedly connected by manual spot welding. The longitudinal I-beam, transverse I-beam, channel steel and channel steel are fixedly arranged on the bottom plate by manual spot welding respectively.

[0050] The intermediate buffer station 3 includes a first roller conveying mechanism for temporarily storing the workpiece after preliminary welding;

[0051] The automatic welding station 4 includes a second lifting roller mechanism 42, a second lifting device for driving the second lifting roller mechanism 42 to lift, a welding tooling platform 41, a welding device 43 and a welding positioning device 44. The welding tooling platform 41 is provided with a second through hole for the second lifting roller mechanism 42 to pass through, welding devices 43 are provided on both sides of the welding tooling platform 41, and a welding positioning device 44 is provided on the welding tooling platform 41 for full welding of the workpiece that has completed preliminary welding;

[0052] The material unloading and caching station 5 includes a second roller conveying mechanism for temporarily storing the workpiece after full welding processing;

[0053] The finished product station includes a finished product rack and a second lifting manipulator.

[0054] The welding device 43 comprises:

[0055] Welding robots for full welding of welds;

[0056] C-type support frame, used to support the welding robot;

[0057] The wire feeder is arranged on the side of the C-shaped support frame and is used to supply welding wire to the welding robot;

[0058] The wire supply reel is arranged at the upper end of one side surface of the C-shaped support frame and is used for storing welding wire.

[0059] The C-shaped support frame comprises:

[0060] A linear slide, on which a moving platform is provided, is used to drive the moving platform to move linearly back and forth;

[0061] A column is fixedly arranged on the moving platform, a mounting groove is arranged at the upper end of the column, and a rotating motor is arranged at the upper end of the side surface of the column;

[0062] A rotating arm, the welding robot is arranged at one end of the rotating arm, and a rotating shaft is arranged at the other end of the rotating arm, and the rotating shaft is rotatably arranged in the mounting groove;

[0063] A gear ring, fixedly arranged on the upper end of the rotating shaft;

[0064] A driving gear, wherein the rotating motor is connected to the ring gear through the driving gear.

[0065] The bottom plate positioning device comprises:

[0066] Positioning strip, the positioning strip is embedded in the upper surface of the assembly tooling platform 21, the length direction of the positioning strip is perpendicular to the feeding direction, a number of plug holes are opened on the positioning strip corresponding to the specifications of the civil air defense door, and the upper surface of the positioning strip is marked with positioning numbers and specification parameters on one side of the plug hole;

[0067] The limit block is movably arranged on the upper surface of the assembly tooling platform 21, and a positioning through hole is provided on the upper surface corresponding to the plug hole, and an observation port is opened at the position of the limit block corresponding to the positioning number and specification parameter;

[0068] Positioning pin, the limit block is connected to the positioning bar through the positioning pin.

[0069] The profile positioning device comprises

[0070] The positioning device bracket includes a guide frame, a profile positioning seat and a profile positioning pin. The guide frame is provided with a plurality of profile positioning seats. The guide frame and the profile positioning seat are provided with through holes for the positioning pin to pass through.

[0071] A gantry frame is movably arranged on the upper surface of the assembly tooling platform 21, and the gantry frame is used to fix the guide frame, and the gantry frame is connected to the positioning bracket through a positioning pin;

[0072] The profile positioning unit includes a profile positioning plate. The positioning unit is fixedly arranged at the bottom of the positioning bracket and the plane where the positioning plate is located is arranged parallel to the longitudinal I-beam.

[0073] The assembly blocking limit mechanism 24 includes an assembly blocking block, an assembly blocking pin and a handle ring, a handle ring is fixed on the upper surface of the assembly blocking block, and an assembly blocking pin is fixed on the lower surface of the assembly blocking block. An assembly blocking slot matching the assembly blocking pin is opened on the assembly tooling platform 21, and the assembly blocking block is tilted away from the side of the welding tooling platform 41.

[0074] The welding positioning device 44 comprises:

[0075] A welding positioning unit, the welding positioning unit comprising a welding positioning plate;

[0076] A welding positioning support frame, used to fix the welding positioning unit, and the welding positioning support frame is movably arranged on the welding tooling platform 41;

[0077] A welding blocking and limiting mechanism 45 is provided at the front side of the welding tooling platform 41 and is used to limit and block the workpiece;

[0078] The driving unit includes a driving cylinder which is fixedly arranged on a column of the C-shaped support frame, and a piston rod of the driving cylinder is fixedly connected to the welding positioning support frame.

[0079] The welding blocking limit mechanism 45 includes a welding blocking block, a welding blocking pin and a handle ring. The welding blocking block is provided with a welding blocking through hole for the welding blocking pin to pass through. The welding tooling platform 41 is provided with a welding blocking socket matching the welding blocking pin. The welding tooling platform 41 is provided with a welding blocking groove matching the welding blocking block. The side of the welding blocking block away from the welding tooling platform 41 is perpendicular to the horizontal plane.

[0080] The present invention also provides a method for processing a steel structure door leaf, comprising: step one, manually hoisting the required base plate onto the assembly tooling platform 21 through an auxiliary machine; step two, using the base plate positioning device on the assembly tooling platform 21 to complete the positioning and fixing of the base plate; step three, the operator first hoists the channel steel onto the base plate through the auxiliary machine, completes the positioning and spot welds the base plate and the channel steel to fix them; step four, the operator then hoists the longitudinal I-beam onto the base plate through the auxiliary machine, positions the longitudinal I-beam to form a group of longitudinal I-beam groups, and spot welds the base plate and the longitudinal I-beam to fix them; step five, after placing a group of longitudinal I-beam groups, the operator then hoists the transverse I-beam onto the base plate through the auxiliary machine, positions the transverse I-beam, spot welds the base plate and the transverse I-beam to fix them, and fixes the longitudinal weld between the longitudinal I-beam and the transverse I-beam by manual full welding; step six, the operator uses the auxiliary machine to fix another group of longitudinal I-beam groups Hoisted to the bottom plate, another group of longitudinal I-beams is positioned on the bottom plate and then spot welded to fix it, and the longitudinal welds between the longitudinal I-beams and the transverse I-beams of the other group of longitudinal I-beams are fixed by manual full welding; step seven, loop step five and step six; step eight, spot weld and fix the transverse welds between each longitudinal I-beam and transverse I-beam; step nine, hoist the groove steel to the bottom plate through auxiliary machinery, position the groove steel and weld it; step ten, transfer the assembled workpiece to the intermediate buffer station 3; step eleven, transfer the workpiece on the intermediate buffer station 3 to the automatic welding station 4; step twelve, after the workpiece arrives at the welding tooling platform 41 on the automatic welding station 4, start the welding robot, and the welding robot fully welds the workpiece according to the pre-set trajectory; step thirteen, transfer the fully welded workpiece to the unloading buffer station 5; step fourteen, hoist the workpiece on the unloading buffer station 5 to the finished product area through the auxiliary machinery.

[0081] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. One-way linear welding production line for civil air defense steel structure door leaf, characterized by: The steel structure door leaf comprises a bottom plate, an outer frame, a plurality of longitudinal I-beam groups and a plurality of transverse I-beams, the longitudinal I-beam groups are evenly spaced in the outer frame, the transverse I-beams are arranged between two groups of longitudinal I-beam groups, the longitudinal I-beam groups include longitudinal I-beams evenly spaced along the length direction of the transverse I-beams, the outer frame comprises a U-shaped body and a channel steel, the U-shaped body and the channel steel are fixedly connected to form a rectangular frame, the U-shaped body comprises three channel steels connected in sequence, including a raw material station, a grouping station, an intermediate buffer station, an automatic welding station, a material unloading buffer station and a finished product station arranged in sequence along the feeding direction of the bottom plate; The raw material station includes a plate placing area for storing bottom plates, a first material rack for storing longitudinal I-beams, a second material rack for storing transverse I-beams, a third material rack for storing channel steels, a fourth material rack for storing channel steels, and a first lifting manipulator; The assembly station includes a first lifting roller mechanism, a first lifting device for driving the first lifting roller mechanism to lift, an assembly tooling platform for supporting the bottom plate, an assembly positioning mechanism and an assembly blocking and limiting mechanism, a first through hole for the first lifting roller mechanism to pass through is provided on the assembly tooling platform, an assembly blocking and limiting mechanism for limiting and blocking the bottom plate is provided on the front side of the assembly positioning mechanism, an assembly positioning mechanism is provided on the assembly tooling platform, the assembly positioning mechanism includes two bottom plate positioning devices for positioning the bottom plate, and a profile positioning device for positioning the longitudinal I-beam, and the two bottom plate positioning devices can be respectively moved along a straight line and are arranged on the assembly On the tooling platform, two bottom plate positioning devices are respectively arranged on the two bottom plate positioning devices, the profile positioning device can be arranged on the tooling platform in a straight line, the motion trajectory of the profile positioning device is perpendicular to the motion trajectory of the bottom plate positioning device, and the motion trajectory of the profile positioning device is consistent with the feeding direction along the bottom plate, the longitudinal weld between the longitudinal I-beam and the transverse I-beam is fixedly connected by manual full welding, the horizontal weld between the longitudinal I-beam and the transverse I-beam is fixedly connected by manual spot welding, and the longitudinal I-beam, transverse I-beam, channel steel and channel steel are respectively fixedly arranged on the bottom plate by manual spot welding; The intermediate buffer station includes a first roller conveying mechanism for temporarily storing the workpiece after preliminary welding; The automatic welding station comprises a second lifting roller mechanism, a second lifting device for driving the second lifting roller mechanism to lift, a welding tooling platform, a welding device and a welding positioning device, the welding tooling platform is provided with a second through hole for the second lifting roller mechanism to pass through, welding devices are provided on both sides of the welding tooling platform, and a welding positioning device is provided on the welding tooling platform for full welding processing of the workpiece that has completed preliminary welding; The material unloading and caching station includes a second roller conveying mechanism for temporarily storing the workpiece after full welding processing; The finished product station includes a finished product rack and a second lifting manipulator; the welding device includes: Welding robots for full welding of welds; C-type support frame, used to support the welding robot; The wire feeder is arranged on the side of the C-shaped support frame and is used to supply welding wire to the welding robot; The wire supply reel is arranged at the upper end of one side surface of the C-shaped support frame and is used for storing welding wire.

2. According to claim 1, the one-way linear welding production line for civil air defense steel structure door leaf is characterized by: The C-shaped support frame comprises: A linear slide, on which a moving platform is provided, is used to drive the moving platform to move linearly back and forth; A column is fixedly arranged on the moving platform, a mounting groove is arranged at the upper end of the column, and a rotating motor is arranged at the upper end of the side surface of the column; A rotating arm, the welding robot is arranged at one end of the rotating arm, and a rotating shaft is arranged at the other end of the rotating arm, and the rotating shaft is rotatably arranged in the mounting groove; A gear ring, fixedly arranged on the upper end of the rotating shaft; A driving gear, wherein the rotating motor is connected to the ring gear through the driving gear.

3. According to claim 2, the one-way linear welding production line for civil air defense steel structure door leaf is characterized in that: The bottom plate positioning device comprises: Positioning strip, the positioning strip is embedded in the upper surface of the assembly tooling platform, the length direction of the positioning strip is perpendicular to the feeding direction, a number of plug holes are opened on the positioning strip corresponding to the specifications of the civil air defense door, and the upper surface of the positioning strip is marked with positioning numbers and specification parameters on one side of the plug hole; The limit block is movably arranged on the upper surface of the assembly tooling platform, and a positioning through hole is provided on the upper surface corresponding to the plug hole, and an observation port is opened at the position of the limit block corresponding to the positioning number and specification parameter; Positioning pin, the limit block is connected to the positioning bar through the positioning pin.

4. According to claim 3, the one-way linear welding production line for civil air defense steel structure door leaf is characterized in that: The profile positioning device comprises The positioning device bracket includes a guide frame, a profile positioning seat and a profile positioning pin. The guide frame is provided with a plurality of profile positioning seats. The guide frame and the profile positioning seat are provided with through holes for the positioning pin to pass through. A gantry frame is movably arranged on the upper surface of the assembly tooling platform, the gantry frame is used to fix the guide frame, and the gantry frame is connected to the positioning bracket through a positioning pin; The profile positioning unit includes a profile positioning plate. The positioning unit is fixedly arranged at the bottom of the positioning bracket and the plane where the positioning plate is located is arranged parallel to the longitudinal I-beam.

5. According to claim 4, the one-way linear welding production line for civil air defense steel structure door leaf is characterized in that: The assembly blocking limit mechanism includes an assembly blocking block, an assembly blocking pin and a handle ring, a handle ring is fixed on the upper surface of the assembly blocking block, a assembly blocking pin is fixed on the lower surface of the assembly blocking block, an assembly blocking slot matching the assembly blocking pin is opened on the assembly tooling platform, and the assembly blocking block is tilted away from the side of the welding tooling platform.

6. According to claim 5, the one-way linear welding production line for civil air defense steel structure door leaf is characterized in that: The welding positioning device includes: A welding positioning unit, the welding positioning unit comprising a welding positioning plate; A welding positioning support frame is used to fix the welding positioning unit, and the welding positioning support frame is movably arranged on the welding tooling platform; The welding blocking and limiting mechanism is arranged on the front side of the welding tooling platform and is used to limit and block the workpiece; The driving unit includes a driving cylinder which is fixedly arranged on a column of the C-shaped support frame, and a piston rod of the driving cylinder is fixedly connected to the welding positioning support frame.

7. The one-way linear welding production line for civil air defense steel structure door leaf according to claim 6 is characterized by: The welding blocking limit mechanism includes a welding blocking block, a welding blocking pin and a handle ring. The welding blocking block is provided with a welding blocking through hole for the welding blocking pin to pass through. The welding tooling platform is provided with a welding blocking socket matching the welding blocking pin. The welding tooling platform is provided with a welding blocking groove matching the welding blocking block. The side of the welding blocking block away from the welding tooling platform is perpendicular to the horizontal plane.

8. A method for processing a steel structure door leaf applied to a one-way linear welding production line for a civil air defense steel structure door leaf as claimed in any one of claims 1 to 7, characterized in that: include: Step 1: Manually hoist the required base plate onto the assembly tooling platform through auxiliary machinery; Step 2: Use the bottom plate positioning device on the assembly tooling platform to complete the positioning and fixing of the bottom plate; Step 3: The operator first uses auxiliary machinery to hoist the channel steel onto the bottom plate, completes the positioning, and spot welds the bottom plate and the channel steel; Step 4: The operator then uses an auxiliary machine to hoist the longitudinal I-beams onto the bottom plate, positions the longitudinal I-beams to form a set of longitudinal I-beams, and spot welds the bottom plate and the longitudinal I-beams to fix them; Step 5: After placing a set of longitudinal I-beams, the operator then hoists the transverse I-beams onto the bottom plate through auxiliary machinery, positions the transverse I-beams, spot welds the bottom plate and the transverse I-beams, and fixes the longitudinal welds between the longitudinal I-beams and the transverse I-beams by manual full welding; Step 6: The operator hoists another set of longitudinal I-beams onto the bottom plate through an auxiliary machine, and fixes the other set of longitudinal I-beams by spot welding after positioning on the bottom plate, and fixes the longitudinal welds between the longitudinal I-beams and the transverse I-beams of the other set of longitudinal I-beams by manual full welding; Step 7, loop step 5 and step 6; Step 8, fix the transverse welds between each longitudinal I-beam and transverse I-beam by spot welding; Step nine, hoist the channel steel onto the bottom plate through auxiliary machinery, position the channel steel and weld it; Step 10, transferring the assembled workpieces to the intermediate buffer station; Step 11, transferring the workpiece on the intermediate buffer station to the automatic welding station; Step 12: After the workpiece arrives at the welding tooling platform on the automatic welding station, the welding robot is started, and the welding robot performs full welding on the workpiece according to a pre-set trajectory; Step 13, transferring the fully welded workpiece to the material unloading buffer station; Step 14: Use auxiliary machinery to lift the workpiece on the unloading buffer station to the finished product area.

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