Internal welding equipment and internal welding to external welding conversion process for longitudinal rib outside welding of plate unit

Abstract

The application discloses inner welding equipment and inner welding and outer welding conversion process for outer welding of longitudinal ribs of a plate unit, relates to the technical field of plate unit welding, and comprises a plate unit supporting device, a gantry type plate unit inner welding machine, a movable outer welding gantry and a plurality of outer welding devices. The application further comprises an outer welding movable gantry arranged in the middle of the gantry track, and the outer welding device is detachably mounted on the outer welding movable gantry. The number of the outer welding device is consistent with the number of the inner welding device, so that the gantry type plate unit inner welding machine can perform the outer welding process. When the inner welding equipment needs to perform the plate unit U rib outer welding process, the welding machine is disconnected from the welding trolley of the inner welding device. At this time, the disconnected part is located in the middle of the gantry track, the disconnected welding wire and wire are connected to the outer welding device, the conversion of the inner welding and the outer welding is quickly realized, the number requirement of the welding machine and the wiring difficulty of the electric appliance are reduced, and the mutual interference problem of the inner welding and the outer welding of the integrated inner welding and outer welding equipment is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate unit welding, in particular to an inner welding device for longitudinal rib outer welding of a plate unit and an inner welding and outer welding production change process. BACKGROUND

[0002] The plate unit is a core prefabricated component in modern steel structures (such as bridges and buildings), which is composed of a steel panel and a plurality of rib plates through welding.

[0003] At present, the welding of the plate unit mainly refers to the welding between the rib plate and the steel panel, and the welding is divided into inner welding and outer welding. To complete the inner and outer welding of the plate unit, either the inner welding is first performed by using a plate unit inner welding device, and then the outer welding is performed by using a plate unit outer welding device, or the inner and outer welding are simultaneously performed by using a plate unit inner and outer welding integrated device.

[0004] At present, neither the inner welding device nor the outer welding device can independently complete the welding work of the inner welding and the outer welding. When working, the same number of welding machines as the number of rib plates is used to drive the inner welding trolley or the outer welding device, which is low in efficiency, and the inner welding device cannot complete the outer welding, and the outer welding device cannot complete the inner welding.

[0005] The inner and outer welding integrated device needs to use double the number of welding machines to simultaneously drive the inner welding trolley or the outer welding device for welding, which is high in equipment cost, and the welding of the inner and outer welding simultaneously exists the problem of mutual interference. SUMMARY

[0006] In order to solve the above technical problems, the present application provides an inner welding device for longitudinal rib outer welding of a plate unit and an inner welding and outer welding production change process. The following technical solutions are adopted:

[0007] The inner welding equipment for the outer welding of the longitudinal rib of the plate unit comprises a plate unit support device, a gantry plate unit inner welding machine, an outer welding movable gantry and a plurality of outer welding devices, the plate unit support device is used for supporting and positioning the plate unit to be welded, the gantry plate unit inner welding machine comprises a gantry rail, an inner welding movable gantry device, an inner welding arm hanging beam, a plurality of inner welding devices, a plurality of inner welding arm support beams and a plurality of welding machines, the gantry rail is installed on both sides of the plate unit support device, the bottom of the inner welding movable gantry device moves linearly on the gantry rail, the inner welding arm hanging beam is installed on the inner welding movable gantry device, one end of the plurality of inner welding devices is detachably installed on the inner welding arm hanging beam, the bottoms of the plurality of inner welding arm support beams are respectively detachably installed on the pre-set foundation, the bottoms of the plurality of inner welding devices are located on the plurality of inner welding arm support beams, the plurality of welding machines are detachably installed on the inner welding movable gantry device and are respectively connected with the plurality of inner welding devices to control the welding actions of the plurality of inner welding devices, the bottom of the outer welding movable gantry moves on the gantry rail, the plurality of outer welding devices are detachably installed on the outer welding movable gantry, when the inner welding equipment needs to perform the outer welding process of the U rib of the plate unit, the plurality of welding machines are respectively disconnected from the welding trolleys of the plurality of inner welding devices and are respectively connected with the plurality of outer welding devices to control the welding actions of the outer welding devices.

[0008] By adopting the above technical scheme, the number of welding machines is consistent with the number of inner welding devices, the number of common U ribs of the plate unit is generally 6, therefore the number of inner welding devices is generally also set to 6, if the outer welding needs to be realized synchronously, at least 6 welding machines need to be provided, which is very large in terms of load demand and wiring difficulty, and is also high in terms of gantry requirement;

[0009] Therefore, the outer welding movable gantry is arranged in the middle part of the gantry rail in the thought, the plurality of outer welding devices are detachably hung on the outer welding movable gantry, the number of outer welding devices is also consistent with the number of inner welding devices, so that the gantry plate unit inner welding machine can perform the outer welding process, specifically, when the inner welding equipment needs to perform the outer welding process of the U rib of the plate unit, the plurality of welding machines are respectively disconnected from the welding trolleys of the plurality of inner welding devices, at this time, the disconnected parts are located in the middle part of the gantry rail, the disconnected welding wires and wires are connected to the plurality of outer welding devices, so that the inner and outer welding changeover is quickly realized, at this time, the inner welding movable gantry device and the inner welding device do not work, the outer welding movable gantry drives the plurality of outer welding devices to move above the plate unit, the welding guns are aimed at the outer welding positions of the plate unit, and the plurality of welding machines respectively control the plurality of outer welding devices to perform the outer welding process.

[0010] The inner and outer welding processes of the plate unit positioned on one plate unit support device are realized, the number of welding machines is reduced, the wiring difficulty of the electrical appliances is reduced, and the mutual interference problem of the inner and outer welding integrated equipment is avoided.

[0011] Optionally, the gantry type plate unit internal welding machine further comprises a plurality of internal welding arm transverse position adjusting devices, and the bottoms of the plurality of internal welding devices are respectively installed on the internal welding arm support beam through the plurality of internal welding arm transverse position adjusting devices.

[0012] Optionally, the internal welding arm transverse position adjusting device comprises a linear guide rail beam and a welding arm transverse sliding guide assembly, the bottom of the linear guide rail beam is detachably installed on the upper surface of the internal welding arm support beam, the welding arm transverse sliding guide assembly comprises a sliding groove, a transverse movement guide slot and a guide wheel assembly, the wheels of the guide wheel assembly are located on the linear guide rail beam, the bottom of the transverse movement guide slot is installed on the seat plate of the guide wheel assembly, the bottom of the sliding groove is clamped at the middle slot of the transverse movement guide slot, and the internal welding device is located in the sliding groove and moves back and forth in the sliding groove under the pushing of the internal welding movable gantry device.

[0013] By adopting the above technical scheme, the transverse movement of the sliding groove can be realized through the movement of the welding arm transverse sliding guide assembly, so that the transverse position movement of the internal welding device is realized, and the adaptation to different specifications and sizes of plate units is realized.

[0014] Optionally, the internal welding movable gantry device comprises a gantry and a walking driving motor, the walking driving motor is installed at the bottom of the gantry and drives the gantry to move linearly on the gantry track.

[0015] Optionally, the external welding device comprises an external welding mounting assembly and an external welding equipment, the top of the external welding mounting assembly is detachably installed on the external welding movable gantry, and the top of the external welding equipment is detachably installed on the mounting position at the bottom of the external welding mounting assembly; the transverse position of the external welding equipment is adjusted by moving the external welding mounting assembly on the external welding movable gantry.

[0016] By adopting the above technical scheme, the external welding equipment is detachably mounted on the external welding movable gantry through the external welding mounting assembly, and the external welding equipment can be detached without external welding.

[0017] Optionally, the external welding mounting assembly comprises a connecting piece and a cantilever ear plate, the connecting piece is detachably installed on the external welding movable gantry through fasteners, the top of the cantilever ear plate is hinged to the connecting piece, and the top of the external welding equipment is installed on the mounting position at the bottom of the cantilever ear plate; after the welding gun angle of the external welding equipment is adjusted, the cantilever ear plate and the connecting piece are locked through the fasteners.

[0018] By adopting the above technical scheme, the mounting and dismounting and position adjustment of the external welding equipment can be quickly realized, and the adjustment of the angle of the external welding equipment can also be realized.

[0019] Optionally, the plate unit support device comprises a plurality of fixed support columns and a plate unit support jig, the bottom of the plurality of fixed support columns is installed on the prefabricated foundation, and the plate unit support jig is installed on the top of the plurality of fixed support columns.

[0020] Optionally, the plate unit support device further comprises a pressing plate gantry, the pressing plate gantry moves linearly on the gantry track, and when the position of the plate unit to be welded on the plate unit support jig is determined, the pressing plate gantry is used to press the steel panel of the plate unit to be welded and the plate unit support jig.

[0021] By adopting the above technical scheme, the structure of the pressing plate gantry adopts the form of a pressing plate driven by a hydraulic rod arranged on the gantry, which can realize that before the inner welding or outer welding, the pressing plate gantry is controlled to move to a distance in front of the inner welding movable gantry device or the outer welding movable gantry, and the hydraulic device is started to press the two sides of the steel panel and the plate unit support jig, thereby reducing the deformation amount of the plate unit during the inner welding or outer welding.

[0022] The inner welding and outer welding production change process for plate unit longitudinal rib outer welding welding adopts an inner welding device for plate unit longitudinal rib outer welding welding to weld the plate unit to be welded, and the separate inner welding welding comprises the following steps:

[0023] Step 1, a plurality of outer welding devices are removed, and a plurality of welding machines are connected with a plurality of inner welding devices respectively;

[0024] Step 2, the transverse position of the inner welding device is adjusted through the welding arm transverse sliding guide assembly to ensure that the welding trolley at the end of the inner welding device corresponds to the hole of the U rib of the plate unit to be welded;

[0025] Step 3, the inner welding movable gantry device is started to drive a plurality of inner welding devices to slide forward into the holes of a plurality of U ribs in the sliding groove respectively;

[0026] Step 4, a plurality of welding machines control a plurality of inner welding devices to perform inner welding respectively;

[0027] When it is necessary to adopt the gantry type plate unit inner welding machine to perform outer welding action, the inner and outer welding production change process is performed, and the inner and outer welding production change process comprises the following steps:

[0028] Step 5, a plurality of welding machines are disconnected from a plurality of inner welding devices respectively, and the disconnected wires and welding wires are connected with a plurality of outer welding devices respectively;

[0029] Step 6, the outer welding movable gantry is started to drive a plurality of outer welding devices to move forward and backward respectively, and the welding guns of the plurality of outer welding devices are aligned with the outer welding positions between the U ribs and the steel panel;

[0030] Step 7, a plurality of welding machines control a plurality of outer welding devices to perform outer welding process respectively.

[0031] Optionally, before the inner welding or outer welding, the control pressure plate gantry is moved to the inner welding movable gantry device or the outer welding movable gantry in front of the set distance, and the hydraulic device is started to press the two sides of the steel panel and the panel unit support jig.

[0032] Optionally, the welding deformation of the panel unit during the inner welding or outer welding process can be reduced.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] The present application can provide an inner welding device for outer welding of longitudinal ribs of a panel unit and an inner welding and outer welding production process. An outer welding movable gantry is arranged in the middle of the gantry track, and a plurality of outer welding devices are detachably mounted on the outer welding movable gantry. The number of outer welding devices is consistent with the number of inner welding devices, so that the gantry type panel unit inner welding machine can perform outer welding process. Specifically, when the inner welding device needs to perform panel unit U rib outer welding process, a plurality of welding machines are disconnected from a plurality of inner welding device welding trolleys. At this time, the disconnected part is located in the middle of the gantry track. The disconnected welding wire, wire, etc. are connected to a plurality of outer welding devices, so that the inner and outer welding production change is quickly realized. At this time, the inner welding movable gantry device and the inner welding device are not working. The outer welding movable gantry drives a plurality of outer welding devices to move above the panel unit. The welding gun is aimed at the outer welding position of the panel unit, and a plurality of welding machines control a plurality of outer welding devices to perform outer welding process.

[0035] The inner and outer welding process of positioning the panel unit on one panel unit support device is realized, the number of welding machines required is reduced, and the difficulty of electrical wiring is reduced, while avoiding the mutual interference problem of inner and outer welding of the integrated inner and outer welding device. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a side view structural schematic diagram of the inner welding device for outer welding of longitudinal ribs of a panel unit of the present application;

[0037] Figure 2 is a top view structural schematic diagram of the inner welding device for outer welding of longitudinal ribs of a panel unit of the present application;

[0038] Figure 3 is Figure 1 an enlarged structural schematic diagram of area A of

[0039] Figure 4 is Figure 1 an A-A cross-sectional structural schematic diagram of

[0040] Figure 5 is Figure 1 a B-B cross-sectional structural schematic diagram of

[0041] Explanation of reference signs: 1, plate unit support device; 11, fixed support column; 12, plate unit support jig; 13, pressing plate gantry; 2, gantry type plate unit internal welding machine; 21, gantry rail; 22, internal welding movable gantry device; 23, internal welding arm hanging beam; 24, internal welding device; 25, internal welding arm support beam; 26, internal welding arm transverse position adjusting device; 261, linear guide rail beam; 262, welding arm transverse sliding guide assembly; 2621, sliding groove; 2622, transverse movement guide groove; 2623, guide wheel assembly; 27, welding machine; 31, external welding hanging assembly; 311, connecting piece; 312, cantilever ear plate; 32, external welding equipment; 4, external welding movable gantry; 100, plate unit to be welded; 1001, U rib; 1002, steel panel. DETAILED DESCRIPTION

[0042] The present application will be further described in detail below with reference to the accompanying drawings.

[0043] The embodiment of the present application discloses an internal welding equipment for plate unit longitudinal rib external welding and an internal welding and external welding production process.

[0044] Reference Figure 1 - Figure 5 , embodiment 1, internal welding equipment for plate unit longitudinal rib external welding, including plate unit support device 1, gantry type plate unit internal welding machine 2, external welding movable gantry 4 and multiple external welding devices, plate unit support device 1 is used to support and position plate unit 100 to be welded, gantry type plate unit internal welding machine 2 includes gantry rail 21, internal welding movable gantry device 22, internal welding arm hanging beam 23, multiple internal welding devices 24, multiple internal welding arm support beams 25 and multiple welding machines 27, gantry rail 21 is installed on both sides of plate unit support device 1, the bottom of internal welding movable gantry device 22 moves linearly on gantry rail 21, internal welding arm hanging beam 23 is installed on internal welding movable gantry device 22, one end of multiple internal welding devices 24 is detachably installed on internal welding arm hanging beam 23, the bottom of multiple internal welding arm support beams 25 is respectively detachably installed on the pre-set foundation, the bottom of multiple internal welding devices 4 is located on multiple internal welding arm support beams 25, multiple welding machines 27 are detachably installed on internal welding movable gantry device 22 and are respectively connected with multiple internal welding devices 24 to control the welding action of multiple internal welding devices 24, the bottom of external welding movable gantry 4 moves on gantry rail 21, multiple external welding devices are detachably installed on external welding movable gantry 4, when internal welding equipment needs to perform plate unit U rib external welding process, multiple welding machines 27 are respectively disconnected from the welding trolley of multiple internal welding devices 24 and are respectively connected with multiple external welding devices to control the welding action of external welding devices.

[0045] The number of welding machines 27 is consistent with the number of inner welding devices 24. Generally, the number of U ribs 1001 of a plate unit is 6, so the number of inner welding devices 24 is generally set to 6. If synchronous outer welding needs to be implemented, at least 12 welding machines need to be provided, which is very difficult in terms of load demand and wiring difficulty, and also requires a high gantry;

[0046] Therefore, the middle part of the gantry track 21 is arranged with an outer welding movable gantry 4. A plurality of outer welding devices are detachably mounted on the outer welding movable gantry 4, and the number of outer welding devices is consistent with the number of inner welding devices 24. In this way, the gantry plate unit inner welding machine 2 can perform outer welding process. Specifically, when the inner welding equipment needs to perform plate unit U rib outer welding process, a plurality of welding machines 27 are disconnected from the welding trolley of the plurality of inner welding devices 24. At this time, the disconnected part is located in the middle part of the gantry track 21. The disconnected welding wire, wire, etc. is connected to the plurality of outer welding devices, thereby quickly realizing the production change of inner and outer welding. At this time, the inner welding movable gantry device 22 and the inner welding device 24 are not working. The outer welding movable gantry 4 drives the plurality of outer welding devices to move above the plate unit. The welding gun is aimed at the outer welding position of the plate unit. The plurality of welding machines 27 respectively control the plurality of outer welding devices to perform outer welding process.

[0047] The inner and outer welding processes of the plate unit positioned on the plate unit supporting device 1 are realized, the number of welding machines is reduced, the difficulty of electrical wiring is reduced, and the mutual interference problem of the inner and outer welding integrated equipment is avoided.

[0048] Optionally, the gantry plate unit inner welding machine 2 further comprises a plurality of inner welding arm transverse position adjusting devices 26. The bottom of the plurality of inner welding devices 24 is respectively installed on the inner welding arm supporting beam 25 through the plurality of inner welding arm transverse position adjusting devices 26.

[0049] Optionally, the inner welding arm transverse position adjusting device 26 comprises a linear guide rail beam 261 and a welding arm transverse sliding guide assembly 262. The bottom of the linear guide rail beam 261 is detachably installed on the upper surface of the inner welding arm supporting beam 25. The welding arm transverse sliding guide assembly 262 comprises a sliding groove 2621, a transverse moving guide groove 2622 and a guide wheel assembly 2623. The wheels of the guide wheel assembly 2623 are located on the linear guide rail beam 261. The bottom of the transverse moving guide groove 2622 is installed on the seat plate of the guide wheel assembly 2623. The bottom of the sliding groove 2621 is clamped in the middle groove of the transverse moving guide groove 2622. The inner welding device 24 is located in the sliding groove 2621 and moves forward and backward in the sliding groove 2621 under the pushing of the inner welding movable gantry device 22.

[0050] The transverse movement of the sliding groove 2621 can be realized by the movement of the welding arm transverse sliding guide assembly 262, so as to realize the transverse position movement of the inner welding device 24 and realize the adaptation to different specifications and sizes of plate units.

[0051] Optionally, the inner welding mobile gantry device 22 comprises a gantry and a walking driving motor, the walking driving motor is installed at the bottom of the gantry and drives the gantry to move linearly on the gantry track 21.

[0052] Optionally, the outer welding device comprises an outer welding mounting assembly 31 and an outer welding equipment 32, the top of the outer welding mounting assembly 31 is detachably installed on the outer welding mobile gantry 4, and the top of the outer welding equipment 32 is detachably installed on the mounting position at the bottom of the outer welding mounting assembly 31, and the adjustment of the lateral position of the outer welding equipment 32 is realized by moving the position of the outer welding mounting assembly 31 on the outer welding mobile gantry 4.

[0053] The outer welding equipment 32 is detachably mounted on the outer welding mobile gantry 4 through the outer welding mounting assembly 31, and the outer welding equipment 32 can be detached when outer welding is not needed.

[0054] Optionally, the outer welding mounting assembly 31 comprises a connecting piece 311 and a cantilever ear plate 312, the connecting piece 311 is detachably installed on the outer welding mobile gantry 4 through fasteners, the top of the cantilever ear plate 312 is hinged to the connecting piece 311, and the top of the outer welding equipment 32 is installed on the mounting position at the bottom of the cantilever ear plate 312, and the cantilever ear plate 312 is locked with the connecting piece 311 through the fasteners after the welding torch angle of the outer welding equipment 32 is adjusted.

[0055] The mounting and detaching and position adjustment of the outer welding equipment 32 can be quickly realized, and the angle adjustment of the outer welding equipment 32 can also be realized.

[0056] Optionally, the plate unit supporting device 1 comprises a plurality of fixed supporting columns 11 and a plate unit supporting jig 12, the bottom of the plurality of fixed supporting columns 11 is installed on the prefabricated foundation, and the plate unit supporting jig 12 is installed at the top of the plurality of fixed supporting columns 11.

[0057] Optionally, the plate unit supporting device 1 further comprises a pressing plate gantry 13, the pressing plate gantry 13 moves linearly on the gantry track 21, and when the position of the to-be-welded plate unit 100 on the plate unit supporting jig 12 is determined, the steel face plate 1002 of the to-be-welded plate unit 100 is pressed tightly with the plate unit supporting jig 12 through the pressing plate gantry 13.

[0058] The structure of the pressing plate gantry 13 adopts the form that a pressing plate driven by a hydraulic rod is arranged on the gantry, so that the pressing plate gantry 13 can be controlled to move to a set distance in front of the inner welding mobile gantry device 22 or the outer welding mobile gantry 4 before inner welding or outer welding, and the hydraulic device is started to press the two sides of the steel face plate 1002 tightly with the plate unit supporting jig 12, thereby reducing the deformation amount of the plate unit during inner welding or outer welding.

[0059] The inner welding and outer welding conversion process for the plate unit longitudinal rib outer welding welding adopts the inner welding equipment for the plate unit longitudinal rib outer welding welding to weld the plate unit 100 to be welded, and the separate inner welding welding includes the following steps:

[0060] Step 1, remove the plurality of outer welding devices, and connect the plurality of welding machines 27 with the plurality of inner welding devices 24 respectively;

[0061] Step 2, adjust the transverse position of the inner welding device 24 through the welding arm transverse sliding guide assembly 262, and ensure that the welding trolley at the end of the inner welding device 24 corresponds to the hole of the U rib 1001 of the plate unit 100 to be welded;

[0062] Step 3, start the inner welding movable gantry device 22, and drive the plurality of inner welding devices 24 to slide forward in the sliding groove 2621 to enter the holes of the plurality of U ribs 1001 respectively;

[0063] Step 4, the plurality of welding machines 27 respectively control the plurality of inner welding devices 24 to perform inner welding;

[0064] When it is needed to adopt the gantry plate unit inner welding machine 2 to perform outer welding action, the inner and outer welding conversion process is performed, and the inner and outer welding conversion process includes the following steps:

[0065] Step 5, disconnect the plurality of welding machines 27 from the plurality of inner welding devices 24 respectively, and connect the disconnected wires and welding wires with the plurality of outer welding devices respectively;

[0066] Step 6, start the outer welding movable gantry 4, and drive the plurality of outer welding devices to move forward and backward respectively, and the welding guns of the plurality of outer welding devices are aligned with the outer welding positions between the U rib 1001 and the steel face plate 1002;

[0067] Step 7, the plurality of welding machines 27 respectively control the plurality of outer welding devices to perform outer welding process.

[0068] Optionally, before inner welding or outer welding, the press plate gantry 13 is controlled to move to a set distance in front of the inner welding movable gantry device 22 or the outer welding movable gantry 4, and the hydraulic device is started to press the two sides of the steel face plate 1002 and the plate unit support cradle 12 tightly.

[0069] Optionally, the welding deformation amount of the plate unit during the inner welding or outer welding process can be reduced.

[0070] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An inner welding apparatus for outer welding of longitudinal ribs of a panel unit, characterized by: The plate unit support device (1) is used for supporting and positioning the plate unit (100) to be welded, the gantry plate unit internal welding machine (2) includes a gantry rail (21), an internal welding movable gantry device (22), an internal welding arm hanging beam (23), a plurality of internal welding devices (24), a plurality of internal welding arm support beams (25) and a plurality of welding machines (27), the gantry rail (21) is installed on both sides of the plate unit support device (1), the bottom of the internal welding movable gantry device (22) moves linearly on the gantry rail (21), the internal welding arm hanging beam (23) is installed on the internal welding movable gantry device (22), one end of the plurality of internal welding devices (24) is detachably installed on the internal welding arm hanging beam (23), the bottoms of the plurality of internal welding arm support beams (25) are respectively detachably installed on the pre-set foundation, the bottoms of the plurality of internal welding devices (24) are located on the plurality of internal welding arm support beams (25), the plurality of welding machines (27) are detachably installed on the internal welding movable gantry device (22) and are respectively connected with the plurality of internal welding devices (24) to control the welding actions of the plurality of internal welding devices (24), the bottom of the external welding movable gantry (4) moves on the gantry rail (21), the plurality of external welding devices are detachably installed on the external welding movable gantry (4), when the internal welding equipment needs to perform the plate unit U rib external welding process, the plurality of welding machines (27) are respectively disconnected from the welding trolleys of the plurality of internal welding devices (24) and are respectively connected with the plurality of external welding devices to control the welding actions of the external welding devices. The gantry plate unit internal welding machine (2) further includes a plurality of internal welding arm transverse position adjusting devices (26), and the bottoms of the plurality of internal welding devices (24) are respectively installed on the internal welding arm support beams (25) through the plurality of internal welding arm transverse position adjusting devices (26). The internal welding arm transverse position adjusting device (26) includes a linear guide rail beam (261) and a welding arm transverse sliding guide assembly (262), the bottom of the linear guide rail beam (261) is detachably installed on the upper surface of the internal welding arm support beam (25), the welding arm transverse sliding guide assembly (262) includes a sliding groove (2621), a transverse movement guide groove (2622) and a guide wheel assembly (2623), the wheels of the guide wheel assembly (2623) are located on the linear guide rail beam (261), the bottom of the transverse movement guide groove (2622) is installed on the seat plate of the guide wheel assembly (2623), the bottom of the sliding groove (2621) is clamped at the middle groove of the transverse movement guide groove (2622), and the internal welding device (24) is located in the sliding groove (2621) and moves back and forth in the sliding groove (2621) under the pushing of the internal welding movable gantry device (22).

2. An inner welding apparatus for outer welding of longitudinal ribs of a plate unit according to claim 1, characterized in that: The internal welding movable gantry device (22) includes a gantry and a walking driving motor, the walking driving motor is installed at the bottom of the gantry and drives the gantry to move linearly on the gantry rail (21).

3. An inner welding apparatus for outer welding of longitudinal ribs of a plate unit according to claim 2, characterized in that: The outer welding device comprises an outer welding mounting assembly (31) and an outer welding equipment (32), the top of the outer welding mounting assembly (31) is detachably mounted on the outer welding movable gantry (4), the top of the outer welding equipment (32) is detachably mounted on the mounting position at the bottom of the outer welding mounting assembly (31), and the transverse position of the outer welding equipment (32) is adjusted by moving the position of the outer welding mounting assembly (31) on the outer welding movable gantry (4).

4. An inner welding apparatus for outer welding of longitudinal ribs of a plate unit according to claim 3, characterized in that: The outer welding mounting assembly (31) comprises a connecting piece (311) and a cantilever ear plate (312), the connecting piece (311) is detachably mounted on the outer welding movable gantry (4) through fasteners, the top of the cantilever ear plate (312) is hinged to the connecting piece (311), and the top of the outer welding equipment (32) is mounted on the mounting position at the bottom of the cantilever ear plate (312); after the welding gun angle of the outer welding equipment (32) is adjusted, the cantilever ear plate (312) is locked with the connecting piece (311) through fasteners.

5. An inner welding apparatus for outer welding of longitudinal ribs of a plate unit according to claim 4, characterized in that: The plate unit supporting device (1) comprises a plurality of fixed supporting columns (11) and a plate unit supporting jig (12), the bottom of the plurality of fixed supporting columns (11) is mounted on the prefabricated foundation, and the plate unit supporting jig (12) is mounted on the top of the plurality of fixed supporting columns (11).

6. An inner welding apparatus for outer welding of longitudinal ribs of a plate unit according to claim 5, characterized in that: The plate unit supporting device (1) further comprises a pressing plate gantry (13), the pressing plate gantry (13) moves linearly on the gantry track (21), and when the position of the plate unit to be welded (100) on the plate unit supporting jig (12) is determined, the steel face plate (1002) of the plate unit to be welded (100) is pressed against the plate unit supporting jig (12) through the pressing plate gantry (13).

7. A process for changing over from inside welding to outside welding for longitudinal rib outside welding of a panel unit, characterized by, The inner welding equipment for plate unit longitudinal rib outer welding welding in claim 6 is used for welding the plate unit to be welded (100), and the separate inner welding welding comprises the following steps: Step 1, the plurality of outer welding devices are detached, and the plurality of welding machines (27) are connected with the plurality of inner welding devices (24) respectively; Step 2, the transverse position of the inner welding device (24) is adjusted through the welding arm transverse sliding guide assembly (262), and it is ensured that the welding trolley at the end of the inner welding device (24) corresponds to the hole of the U rib (1001) of the plate unit to be welded (100); Step 3, the inner welding movable gantry device (22) is started, and the plurality of inner welding devices (24) are respectively driven to slide forward into the holes of the plurality of U ribs (1001) in the sliding groove (2621); Step 4, the plurality of welding machines (27) respectively control the plurality of inner welding devices (24) to perform inner welding; When it is needed to perform outer welding action by using the gantry type plate unit inner welding machine (2), an inner-outer welding change process is performed, and the inner-outer welding change process comprises the following steps: Step 5, the plurality of welding machines (27) are respectively disconnected from the plurality of inner welding devices (24), and the disconnected wires and welding wires are respectively connected with the plurality of outer welding devices; Step 6, the outer welding movable gantry (4) is started, and the plurality of outer welding devices are respectively driven to move forward and backward, and the welding guns of the plurality of outer welding devices are aligned with the outer welding positions between the U rib (1001) and the steel face plate (1002); Step 7, multiple welding machines (27) control multiple outer welding devices to perform outer welding process.

8. The process for converting from inside-out welding to outside- welding of longitudinal rib outside welds of a panel unit as set forth in claim 7, wherein, Before inner welding or outer welding, control the presser gantry (13) to move to the front of the inner welding movable gantry device (22) or the outer welding movable gantry (4) at a set distance, and start the hydraulic device to press the two sides of the steel panel (1002) and the panel unit support bed (12) tightly.

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