A spatial curved surface structure assembly welding device and method

Abstract

The application provides a spatial curved surface structure assembly welding device and method, relates to the technical field of steel structure welding in mechanical manufacturing, and the assembly welding device comprises a spatial curved surface structure limiting assembly, the spatial curved surface structure limiting assembly is fixedly connected on a platform frame assembly, and effective curved surfaces are provided as reference surfaces for the process of spatial curved surface structure assembly welding; turnover compression assemblies A, B and C are fixedly connected on the spatial curved surface structure limiting assembly respectively, are used for compressing and fixing the frame of the spatial curved surface structure, and control welding deformation. The application utilizes curved rib plates to be spliced into a net-shaped assembly positioning spatial curved surface welding structure, realizes taking the spatial curved surface as a reference surface, adopts a plug-in plate structure to ensure the assembly group precision, adjusts the corresponding position relationship between the clamping groove structures of each curved rib plate and the groove structures of the platform bottom plate, ensures that each curved rib plate is accurately assembled with the platform bottom plate, and guarantees effective implementation of the design scheme.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical manufacturing steel structure welding, in particular, especially relates to a space curved surface structure assembly welding device and method. BACKGROUND

[0002] With the wide application of streamline design in the field of railway vehicles, how to ensure the effective implementation of the streamline design scheme of the driver's cab of the motor train unit is a subject that the locomotive manufacturing industry is constantly exploring. The drum-shaped side wall of the streamline driver's cab of the motor train unit is composed of a plurality of different curved profiled pieces and rib plates according to certain spatial positions, and is a typical and complex space curved surface welding structure.

[0003] In the space curved surface structure, there is generally no effective plane that can be used as the design reference surface of the assembly welding process device. At present, in order to simplify the construction difficulty, the space curved surface structure is scattered and assembled into several parts for welding, and finally assembled together to complete the welding. After each assembly welding, the size of the space curved surface needs to be corrected. The assembly welding process steps are complicated and inefficient, the size of the space curved surface after overall assembly welding is difficult to guarantee, and the manufacturing cost of the assembly welding device is high. The existing space curved surface structure welding process device cannot guarantee, for example, Figure 1 As shown in the figure, the curved surface shape and size of the drum-shaped side wall of the FXD3 type power car (drum-shaped) streamline driver's cab meet the requirements of the product drawing, and cannot meet the demand of the production rhythm of this vehicle type, so it is necessary to design and manufacture a space curved surface structure assembly welding device suitable for the drum-shaped side wall type of the FXD3 type power car (drum-shaped) streamline driver's cab.

[0004] The skin top plate of the space curved surface welding structure is in the shape of a space curved surface, and the back is reinforced with a welding grid rib, as shown in Figure 2 The existing space curved surface structure welding deformation control device is based on the analysis conclusion and the actual deformation state of the welding deformation. For the assembly of asymmetric welding structure and poor local welding stability, the assembly welding is controlled by grouping assembly and local rigid fixing tooling, and the specific measures are as follows:

[0005] (1) Positioning is performed by using a top plate profiling tool, the longitudinal and transverse grid reinforcing ribs are grouped into small assemblies, and the top plate is welded after welding and shaping.

[0006] (2) When welding the top plate, a rigid fixing tooling is added on one side of the top plate to enhance the stability of the top plate.

[0007] Based on the above welding deformation control measures, in order to ensure the accuracy of welding and shaping and the consistency of the product, as shown in Figure 3 When the oil press machine is pressed in the middle position, the two sides are uniformly loaded, the local small range shaping can be realized. The size of the shaped product tends to be consistent, meeting the requirement of consistency of batch products.

[0008] However, the disadvantages of the existing technology are: 1) The existing spatial curved surface structure welding deformation control device does not provide an effective positioning dimension or reference surface as a basis for shape and position dimensions during the overall assembly welding of the component. When the welding deformation is large, the size of the component welding will be out of control; 2) The existing spatial curved surface structure welding deformation control device uses two welding devices and one shape correction device to complete the spatial curved surface structure welding in multiple steps. The welding process device is cumbersome and complex, time-consuming and labor-intensive; the shape correction device needs to be used in conjunction with a hydraulic press, and the overall device is relatively complex and has a high manufacturing cost.

[0009] Based on the above problems, the present application proposes a new type of spatial curved surface structure welding device. Summary of the Invention

[0010] In response to the aforementioned technical issues that existing curved surface structure welding deformation control devices cannot guarantee accurate welding dimensions and have complex processes, a device and method for welding spatial curved surface structures is provided. The present invention has the function of positioning and fixing spatial curved surface structures, and can provide an effective curved surface as a reference surface during the welding process of spatial curved surface structures.

[0011] The technical means adopted in the present invention are as follows:

[0012] A spatial curved surface structure welding device, comprising:

[0013] The space curved surface structure limiting assembly is fixedly connected to the platform frame assembly, providing an effective curved surface as a reference surface for the space curved surface structure welding process;

[0014] The flip pressing assembly A, the flip pressing assembly B, and the flip pressing assembly C are respectively fixedly connected to the space curved surface structure limit assembly, and are used to press and fix the frame of the space curved surface structure to control welding deformation.

[0015] Furthermore, the spatial curved surface structure limiting assembly includes a mesh assembly, a plurality of vertical plates and a platform bottom plate, and the mesh assembly and the plurality of vertical plates are fixedly arranged on the platform bottom plate;

[0016] The mesh assembly includes a first horizontal curved rib plate, a group of horizontal curved rib plates, and a group of vertical curved rib plates, wherein the first horizontal curved rib plate, the group of horizontal curved rib plates, and the group of vertical curved rib plates are vertically connected in pairs through a plug-in structure to form a mesh structure;

[0017] The mesh assembly further includes an I-shaped column, which includes two vertically arranged curved ribs and a horizontally arranged curved rib. The I-shaped column is arranged on one side of the mesh structure.

[0018] Furthermore, one end of the curved rib is L-shaped, and a slot structure and a top stop are provided on the curved rib. The outer side surface of the first horizontal curved rib is arranged to coincide with the outer edge of the platform bottom plate.

[0019] Furthermore, the L-shaped ends of at least two curved ribs in a group of horizontally arranged curved ribs are connected to the vertical plate to form a support structure for supporting the flipping and clamping assembly A, and the L-shaped ends of at least one curved rib in a group of horizontally arranged curved ribs are connected to the vertical plate to form a support structure for supporting the flipping and clamping assembly B.

[0020] Furthermore, in a group of vertically arranged curved steel plates, the L-shaped ends of at least four curved steel plates are connected to the vertical plates to form a support structure for supporting the flipping and pressing assembly A; in a group of vertically arranged curved steel plates, the L-shaped end of at least one curved steel plate is connected to the vertical plate to form a support structure for supporting the flipping and pressing assembly C.

[0021] Furthermore, the platform base plate is aligned with the platform frame in the length direction and then fixedly connected. A gap is reserved on the platform base plate for limiting the deformation of the welding product by means of F-type clamping. A plurality of grooves are provided on the platform base plate, and the plug-in structure is plugged and fixed into the grooves of the platform base plate one by one.

[0022] Furthermore, the platform frame assembly includes an outer frame, two vertical stabilizing beams are welded between the two long sides of the outer frame, and two horizontal stabilizing beams are welded between the two short sides of the outer frame and the two stabilizing beams.

[0023] Furthermore, the flip-and-press assembly A, the flip-and-press assembly B, and the flip-and-press assembly C are three assembly structures having the same structural composition but different structural dimensions;

[0024] The flip and clamping assembly A includes a connecting seat, the lower end of which is rotatably connected to the L-shaped steel plate through a pin shaft, the upper end of which is limited by a pluggable pin shaft to the L-shaped steel plate, and one end of the L-shaped steel plate is welded to the lead screw.

[0025] The present invention also provides a method for using a spatial curved surface structure assembly welding device, comprising the following steps:

[0026] The spatial curved surface structure is placed on the spatial curved surface structure limit assembly, and supported and positioned through the mesh assembly, so that the spatial curved surface structure uses the spatial curved surface as a reference surface;

[0027] Use flip-and-clamp assembly A, flip-and-clamp assembly B, and flip-and-clamp assembly C to clamp and fix the frame of the spatial curved surface structure;

[0028] Perform welding operations on spatial curved surface structures, and use F-type clamps to clamp the welded products in the reserved gaps to control welding deformation;

[0029] After the assembly welding is completed, the flip pressing assembly A, flip pressing assembly B, and flip pressing assembly C are opened, and the F-type clamp is removed to separate the welded product from the spatial curved surface structure assembly welding device.

[0030] Furthermore, when the spatial curved surface structure is placed on the spatial curved surface structure limiting assembly, the skin curved surface of the spatial curved surface structure corresponds to the mesh assembly formed by accurately plugging each curved rib plate through the plug-in structure so that the curved rib plates are vertically connected in pairs.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] The device of the present invention utilizes curved ribs to form a mesh assembly positioning spatial curved surface welding structure, realizing the use of spatial curved surfaces as reference surfaces, and adopting a plug-in plate structure to ensure mesh assembly accuracy. By adjusting the corresponding positional relationship between the slot structure between each curved rib and the groove structure of the platform bottom plate, it is ensured that each curved rib is accurately assembled with the platform bottom plate, ensuring the effective implementation of the design scheme. The device takes into account the overall assembly welding, control of welding deformation and shape correction functions. At the same time, the application of this structure greatly reduces the difficulty of on-site construction personnel in assembling tooling, and effectively controls the probability of errors in assembling process tooling. In addition to the screw tightening and clamping device, it has no other mechanically processed parts and has a simple structure, which greatly reduces the investment cost of this process tooling.

[0033] The application of this spatial curved surface structure welding process device ensures the smooth welding production of the drum-shaped side walls of the driver's cab of the FXD3 power vehicle (drum-shaped), solves the difficult problem of ensuring the streamlined external dimensions of the drum-shaped side walls of the driver's cab of this type of vehicle after welding, improves the work efficiency of front-line welding employees, reduces labor intensity, creates significant economic benefits, and achieves cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 It is a schematic diagram of the drum-shaped side wall structure of a streamlined driver's cab in the prior art.

[0036] Figure 2 This is a physical picture of a spatial curved surface structural component in the prior art.

[0037] Figure 3 It is a shaping process equipment in the existing technology.

[0038] Figure 4It is a structural schematic diagram of the welding device in the present invention.

[0039] Figure 5 It is a schematic diagram of the limiting assembly of the spatial curved surface structure in the present invention.

[0040] Figure 6 Schematic diagram of the F-type callan reserved area in the present invention.

[0041] Figure 7 This is the front view of the mesh assembly in the present invention.

[0042] Figure 8 This is a schematic diagram of the curved rib plate structure in the present invention.

[0043] Figure 9 Schematic diagram of the groove structure of the platform bottom plate in the present invention.

[0044] Figure 10 This is a schematic diagram of the connection between the curved rib plate and the platform bottom plate in the present invention.

[0045] Figure 11 It is a top view of the mesh assembly in the present invention.

[0046] Figure 12 Schematic diagram of the positioning of the extruded skin on the spatial surface Figure 1 .

[0047] Figure 13 Schematic diagram of the positioning of the extruded skin on the spatial surface Figure 2 .

[0048] Figure 14 This is a schematic diagram of the platform frame assembly in the present invention.

[0049] Figure 15 It is a three-dimensional schematic diagram of the flipping and pressing assembly A in the present invention.

[0050] Figure 16 This is the main view of the flip and press assembly A in the present invention.

[0051] Figure 17 Schematic diagram of the screw structure of the flipping and pressing assembly A in the present invention.

[0052] Figure: 1. Spatial curved surface structure limit assembly; 1.1. Vertical plate A; 1.2. Vertical plate B; 1.3. Vertical plate C; 1.4. Vertical plate D; 1.5. Vertical plate E; 1.6. Vertical plate F; 1.7. Vertical plate G; 1.8. Vertical plate H; 1.9. Vertical plate I; 1.10. Vertical plate J; 1.11. Plate A; 1.12. Vertical plate K; 1.13. Channel steel A; 2. Platform frame assembly; 2.1. Channel steel assembly A; 2.2. Channel steel assembly B; 2.3. Channel steel assembly C; 2.4. Channel steel assembly D; 3. Net assembly; 3.1. Curved rib plate A; 3.2. Curved rib plate B; 3.3. Curved rib plate C; 3.4. Curved rib plate D; 3. 5. Curved rib E; 3.6. Curved rib F; 3.7. Curved rib G; 3.8. Curved rib H; 3.9. Curved rib I; 3.10. Curved rib J; 3.11. Curved rib K; 3.12. First horizontal curved rib L; 3.13. Curved rib M; 3.14. Curved rib N; 3.15. Curved rib O; 3.16. Curved rib P; 3.17. Curved rib Q; 3.18. Curved rib R; 3.19. Curved rib S; 3.20. Curved rib T; 3.21. Curved rib U; 4. Platform bottom plate; 5. Flip and hold-down assembly A; 6. Flip and hold-down assembly B; 7. Flip and hold-down assembly C. DETAILED DESCRIPTION

[0053] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0057] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0058] For ease of description, spatially relative terms such as "above," "above," "on the upper surface of," and "above" may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "on top of" another device or structure would then be positioned as "below" or "below" the other device or structure. Thus, the exemplary term "above" may include both the orientations of "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0059] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0060] like Figure 1-17As shown, the present invention provides a spatial curved surface structure welding device, comprising:

[0061] The spatial curved surface structure limiting assembly 1 is fixedly connected to the platform frame assembly 2, providing an effective curved surface as a reference surface for the spatial curved surface structure assembly welding process;

[0062] The flip pressing assembly A5, the flip pressing assembly B6, and the flip pressing assembly C7 are respectively fixedly connected to the spatial curved surface structure limiting assembly 1, and are used to press and fix the frame of the spatial curved surface structure to control welding deformation.

[0063] The spatial curved surface structure limiting assembly 1 includes a mesh assembly 3, a plurality of vertical plates and a platform bottom plate 4. The mesh assembly 3 and the plurality of vertical plates are fixedly arranged on the platform bottom plate 4.

[0064] The mesh assembly 3 includes a first horizontal curved rib plate, a group of horizontal curved rib plates, and a group of vertical curved rib plates. The first horizontal curved rib plate, the group of horizontal curved rib plates, and the group of vertical curved rib plates are vertically connected in pairs through a plug-in structure to form a mesh structure.

[0065] The mesh assembly 3 further includes an I-shaped column, which includes two vertically arranged curved ribs and a horizontally arranged curved rib. The I-shaped column is arranged on one side of the mesh structure.

[0066] One end of the curved rib is L-shaped, and a slot structure and a top stop are provided on the curved rib. The outer side surface of the first horizontal curved rib is overlapped with the outer edge of the platform bottom plate 4 .

[0067] In a group of horizontally arranged curved ribs, the L-shaped ends of at least two curved ribs are connected to the vertical plates to form a support structure for the flipping and pressing assembly A5. In a group of horizontally arranged curved ribs, the L-shaped end of at least one curved rib is connected to the vertical plate to form a support structure for the flipping and pressing assembly B6. In a group of vertically arranged curved steel plates, the L-shaped ends of at least four curved steel plates are connected to the vertical plates to form a support structure for the flipping and pressing assembly A5. In a group of vertically arranged curved steel plates, the L-shaped end of at least one curved steel plate is connected to the vertical plate to form a support structure for the flipping and pressing assembly C7.

[0068] The platform base plate 4 is aligned with the platform frame assembly 2 in the length direction and then fixedly connected. A gap is reserved on the platform base plate 4 to limit the deformation of the welding product by clamping with an F-type clamp. A number of grooves are provided on the platform base plate 4, and the plug-in structure is plugged and fixed into the grooves of the platform base plate 4 one by one.

[0069] The platform frame assembly 2 includes an outer frame, two vertical stabilizing beams are welded between the two long sides of the outer frame, and two horizontal stabilizing beams are welded between the two short sides of the outer frame and the two stabilizing beams.

[0070] The flip and clamping assembly A5, flip and clamping assembly B6, and flip and clamping assembly C7 are three assembly structures with the same structural composition but different structural dimensions. The flip and clamping assembly A5 includes a connecting seat, the lower end of the connecting seat is rotatably connected to the L-shaped steel plate through a pin shaft, and the upper end of the connecting seat is limited by a pluggable pin shaft to the L-shaped steel plate, and one end of the L-shaped steel plate is welded to the screw.

[0071] The present invention also provides a method for using a spatial curved surface structure assembly welding device, comprising the following steps:

[0072] The spatial curved surface structure is placed on the spatial curved surface structure limiting assembly 1, and supported and positioned by the mesh assembly 3, so that the spatial curved surface structure uses the spatial curved surface as the reference surface; when the spatial curved surface structure is placed on the spatial curved surface structure limiting assembly 1, ensure that each curved rib is accurately plugged into the plug-in structure so that the curved ribs are vertically connected in pairs, and ensure that each curved rib is accurately assembled with the groove of the platform bottom plate 4.

[0073] Use the flip-and-press assembly A5, the flip-and-press assembly B6, and the flip-and-press assembly C7 to press and fix the frame of the spatial curved surface structure;

[0074] Perform welding operations on spatial curved surface structures, and use F-type clamps to clamp the welded products in the reserved gaps to control welding deformation;

[0075] After the assembly welding is completed, the flip pressing assembly A, flip pressing assembly B, and flip pressing assembly C are opened, and the F-type clamp is removed to separate the welded product from the spatial curved surface structure assembly welding device.

[0076] Example 1

[0077] like Figure 1-17 As shown, the present invention provides a spatial curved surface structure assembly welding device, the spatial curved surface structure limiting assembly 1 is fixedly connected to the platform frame assembly 2, and the flip pressing assembly A5, flip pressing assembly B6, and flip pressing assembly C7 are fixedly connected to the spatial curved surface structure limiting assembly 1.

[0078] The spatial curved surface structure limit assembly 1 includes a mesh assembly 3, 2 vertical panels A1.1, vertical panel B1.2, 2 vertical panels C1.3, vertical panel D1.4, 4 vertical panels E1.5, 2 vertical panels F1.6, 2 vertical panels G1.7, 2 vertical panels H1.8, vertical panel I1.9, vertical panel J1.10, plate A1.11, vertical panel K1.12, 3 channel steels A1.13, and a platform base plate 4, and is fixed by plugging in and fixing the plug-in structures one by one to the grooves of the platform base plate 4.

[0079] Mesh assembly 3 includes curved ribs A3.1, B3.2, C3.3, D3.4, E3.5, F3.6, G3.7, H3.8, I3.9, G3.10, K3.11, first horizontal L3.12, M3.13, N3.14, O3.15, P3.16, Q3.17, and R3.18. Curved ribs A to R are vertically connected in pairs through a plug-in structure. Curved ribs S3.19, T3.20, and U3.21 form an I-shaped column.

[0080] Platform frame assembly 2 includes 2 channel steel assemblies A2.1 and 2 channel steel assemblies B2.2 to form the outer frame of the platform frame, and 2 channel steel assemblies C2.3 and 3 channel steel assemblies D2.4 to form the beams that support the internal stability of the platform frame.

[0081] like Figure 4 As shown, the spatial curved surface structure limiting assembly 1 is fixedly connected to the platform frame assembly 2, and is used to support and position the spatial curved surface structure. It can provide an effective curved surface as a reference surface for the process of welding the spatial curved surface structure. The flip pressing assembly A5, the flip pressing assembly B6, and the flip pressing assembly C7 are fixedly connected to the spatial curved surface structure limiting assembly 1, and are used to press and fix the frame of the spatial curved surface structure to control welding deformation.

[0082] Spatial surface structure limited assembly 1, such as Figure 5 As shown, one end of the multiple curved ribs is composed of multiple vertical plates that are flipped and pressed together to form a supporting structure, including: 2 vertical plates A1.1 and B1.2 connected to the leftmost end of the curved rib 3.13, 2 vertical plates E1.5 and F1.6 connected to the leftmost end of the curved rib 3.18, 2 vertical plates E1.5 and F1.6 connected to the lower end of the curved rib 3.1, 2 vertical plates G1.7 and 2 vertical plates H1.8 connected to the curved rib 3.5 and the uppermost ends of the curved rib plate 3.7 are connected, and the vertical plates G1.9 and H1.10 are connected to the uppermost ends of the curved rib plate 3.10, respectively forming the supporting structures for six flip-and-clamp assemblies A5; two vertical plates C1.3 and D1.4 are connected to the leftmost end of the curved rib plate 3.15, forming the supporting structure for one flip-and-clamp assembly B6; the above supporting structures serve to reinforce the curved rib plates, support, and connect the flip-and-clamp assemblies.

[0083] Spatial surface structure limited assembly 1, such as Figure 6As shown, the platform base plate 4 is aligned with the platform frame assembly 2 in the length direction and then fixedly connected, leaving a gap for flexible connection of the F-type calliper. During the welding process, the F-type calliper will be used for clamping to limit the deformation of the welded product here. It can be disassembled at will, and after welding, the welded product can be easily separated from the process tooling.

[0084] Mesh assembly 3, such as Figure 7 As shown, the component's spatial curved surface is composed of countless connected curves, simplifying the curved skin into a series of intersecting curves. After modeling in SolidWorks 3D graphics software, the skin surface was identified. Multiple curves intersecting vertically and horizontally on the surface, with their projection planes perpendicular to each other, were selected as the basis for constructing the skin's curved ribs. These intersecting vertically and horizontally curved ribs were then spliced ​​together into a mesh assembly. This mesh assembly 3 serves as the limit datum for the curved surface of the driver's cab's drum-shaped side wall.

[0085] Mesh assembly 3, such as Figure 8 、 9 As shown in Figures 10 and 11, the positional relationship of each curved rib in the mesh assembly 3 determines the accuracy of the curved reference plane, and the plug-in structure is used to ensure that the curved ribs can be accurately plugged in and connected vertically in pairs. There are many curved ribs in the mesh assembly 3, and their shapes and sizes are very similar. Therefore, by adjusting the corresponding positional relationship between the blocking structure between each curved rib and the groove structure of the platform bottom plate 4, it is ensured that each curved rib can only be inserted into the fixed position of the groove of the platform bottom plate 4 one by one. This design ensures the effective implementation of the device plan, better controls the assembly accuracy, and at the same time reduces the difficulty of on-site construction personnel in assembling the device, reducing the probability of errors made by the group when assembling the device.

[0086] Mesh assembly 3, such as Figure 12-13 As shown, one end of each curved rib is L-shaped and has a slot structure; each curved rib can be increased to include a top stop according to the characteristics of the spatial curved surface profiled skin; after the workpiece is clamped, the outer side surface of the curved rib L3.12 is aligned with the lower side surface of the edge of the spatial curved surface profiled skin, acting as a reference surface; the above structure is used for auxiliary positioning of the spatial curved surface profiled skin.

[0087] Platform frame assembly 2, such as Figure 14 As shown, it includes 2 channel steel assemblies A2.1 and 2 channel steel assemblies B2.2 to form the outer frame of the platform frame, and 2 channel steel assemblies C2.3 and 3 channel steel assemblies D2.4 to form beams supporting the internal stability of the platform frame.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spatial curved surface structure welding device, characterized in that: include: A space curved surface structure limiting assembly (1), wherein the space curved surface structure limiting assembly (1) is fixedly connected to the platform frame assembly (2) to provide an effective curved surface as a reference surface for the process of welding the space curved surface structure; The flip pressing assembly A (5), the flip pressing assembly B (6), and the flip pressing assembly C (7) are respectively fixedly connected to the space curved surface structure limit assembly (1) and are used to press and fix the frame of the space curved surface structure to control welding deformation; The spatial curved surface structure limiting assembly (1) comprises a mesh assembly (3), a plurality of vertical plates and a platform bottom plate (4), wherein the mesh assembly (3) and the plurality of vertical plates are fixedly arranged on the platform bottom plate (4); The mesh assembly (3) includes a first horizontal curved rib plate, a group of horizontal curved rib plates, and a group of vertical curved rib plates. The first horizontal curved rib plate, the group of horizontal curved rib plates, and the group of vertical curved rib plates are vertically connected in pairs through a plug-in plate structure to form a mesh structure. The mesh assembly (3) further comprises an I-shaped column, wherein the I-shaped column comprises two vertically arranged curved ribs and a horizontally arranged curved rib, and the I-shaped column is arranged on one side of the mesh structure; The platform base plate (4) is fixedly connected to the platform frame assembly (2) after being aligned in the longitudinal direction. A gap is reserved on the platform base plate (4) for limiting the deformation of the welding product by clamping with an F-type clamp. A plurality of grooves are provided on the platform base plate (4). The plug-in plate structures are plugged and fixed in the grooves of the platform base plate (4) one by one.

2. The spatial curved surface structure welding device according to claim 1, characterized in that: One end of the curved rib is L-shaped, and a slot structure and a top stop are provided on the curved rib. The outer side surface of the first horizontal curved rib is arranged to coincide with the outer edge of the platform bottom plate (4).

3. The spatial curved surface structure welding device according to claim 2, characterized in that: At least two of the curved ribs in a set of horizontally arranged curved ribs have L-shaped ends connected to the vertical plate to form a support structure for supporting the flipping and pressing assembly A (5), and at least one of the curved ribs in a set of horizontally arranged curved ribs has an L-shaped end connected to the vertical plate to form a support structure for supporting the flipping and pressing assembly B (6).

4. The spatial curved surface structure welding device according to claim 2, characterized in that: At least four of the curved steel plates in a group of vertically arranged curved steel plates have their L-shaped ends connected to the vertical plates to form a support structure for supporting the flipping and pressing assembly A (5); at least one of the curved steel plates in a group of vertically arranged curved steel plates has its L-shaped end connected to the vertical plates to form a support structure for supporting the flipping and pressing assembly C (7).

5. The spatial curved surface structure welding device according to claim 1, characterized in that: The platform frame assembly (2) comprises an outer frame, two vertical stabilizing beams are welded between the two long sides of the outer frame, and two horizontal stabilizing beams are welded between the two short sides of the outer frame and the two stabilizing beams.

6. The spatial curved surface structure assembly welding device according to claim 1, characterized in that: The flip-and-press assembly A (5), the flip-and-press assembly B (6), and the flip-and-press assembly C (7) are three assembly structures having the same structural composition but different structural dimensions; The flip pressing assembly A (5) includes a connecting seat, the lower end of which is rotatably connected to an L-shaped steel plate via a pin shaft, the upper end of which is limited by a pluggable pin shaft to the L-shaped steel plate, and one end of the L-shaped steel plate is welded to the lead screw.

7. A method for using a spatial curved surface structure welding device, based on the spatial curved surface structure welding device according to any one of claims 1 to 6, characterized in that: The following steps are involved: The spatial curved surface structure is placed on the spatial curved surface structure limiting assembly (1), and supported and positioned by the mesh assembly (3), so that the spatial curved surface structure uses the spatial curved surface as a reference surface; Using the flip-and-press assembly A (5), the flip-and-press assembly B (6), and the flip-and-press assembly C (7) to press and fix the frame of the spatial curved surface structure; Perform welding operations on spatial curved surface structures, and use F-type clamps to clamp the welded products in the reserved gaps to control welding deformation; After the assembly welding is completed, the flip pressing assembly A (5), the flip pressing assembly B (6), and the flip pressing assembly C (7) are opened, and the F-type calliper is removed to separate the welded product from the spatial curved surface structure assembly welding device.

8. The method for using the spatial curved surface structure welding device according to claim 7, characterized in that: When the spatial curved surface structure is placed on the spatial curved surface structure limiting assembly (1), the skin curved surface of the spatial curved surface structure corresponds to the mesh assembly (3) formed by accurately plugging each curved rib plate through the plug-in plate structure so that the curved rib plates are vertically connected in pairs.

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