Welding method for layered frame sidewall units

Abstract

This invention relates to the field of welding technology and provides a welding method for a layered skeleton-type sidewall unit, comprising the following steps: First, an upper wall panel and a lower wall panel are laid in a tack welding area, overlapping to form a wall panel structure. Second, the dimensions and positioning of a clamping mold are determined based on the layout of the beams and window frames within the sidewall unit, clamping the beams and window frames onto the upper surface of the wall panel structure to form a beam-window frame structure. Third, tack welding is performed on the overlap of the upper and lower wall panels and the connection between the beam-window frame structure and the wall panel structure to form a plate-beam assembly. Fourth, after removing the clamping mold, the plate-beam assembly is transferred to the forming welding area, and beam-column assemblies are stacked on top of the plate-beam assembly and welded to form the sidewall unit. This method ensures welding accuracy between the beams, window frames, upper wall panels, and lower wall panels. During tack welding, there is no need to adjust the beam position or have personnel monitor the entire welding process, saving labor costs.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a welding method for a layered skeleton-type sidewall unit. Background Technology

[0002] The side wall units of rail vehicles are welded together from the wall panels and beams on one side. During the welding process, it is very difficult to assemble and position the crossbeams, which will result in insufficient precision of the side wall units after welding. Due to the problem of insufficient welding precision, the operators need to monitor the welding process throughout the tack welding process to adjust the position of the beams, resulting in wasted personnel and high labor costs. Summary of the Invention

[0003] This invention provides a welding method for a layered skeleton-type side wall unit, which solves the technical problem of insufficient welding precision in the welding process of the side wall unit in the prior art, and realizes precise welding between the beam and the wall panel.

[0004] This invention provides a welding method for a layered frame-type sidewall unit, comprising the following steps:

[0005] The upper and lower wall panels are laid in the positioning welding area so that the upper and lower wall panels overlap each other and form a wall panel structure.

[0006] The size and positioning of the locking mold are determined based on the layout of the beams and window frames in the side wall unit, so that the beams and window frames are locked onto the locking mold on the upper surface of the wall panel mechanism, forming a beam and window frame mechanism.

[0007] The overlapping joints of the upper wall panel and the lower wall panel, as well as the connection between the crossbeam window frame mechanism and the wall panel mechanism, are tack welded to form a plate-beam assembly.

[0008] After removing the card mold, the plate beam assembly is transferred to the forming and welding area, the beam and column assembly is stacked on top of the plate beam assembly, and welded to form the side wall unit.

[0009] According to a welding method for a layered skeleton-type sidewall unit provided by the present invention, the step of determining the size positioning of the clamping mold based on the layout of the beams and window frames in the sidewall unit specifically includes:

[0010] Based on the number and spacing of the beams and window frames, corresponding protrusions are provided along the length of the locking mold, and the protrusions are adapted to the beams and window frames.

[0011] According to a welding method for a layered skeleton-type sidewall unit provided by the present invention, the clamping mold is located at the end of the crossbeam, the protrusion extends toward the crossbeam, and the end of the crossbeam is clamped to the protrusion.

[0012] According to a welding method for a layered skeleton-type sidewall unit provided by the present invention, the window frame assembly has a beam extending toward the locking mold, and both the beam and the beam are configured as cap-shaped beams and form a locking groove, which is adapted to engage with the protrusion.

[0013] According to a welding method for a layered skeleton-type sidewall unit provided by the present invention, the height of the slot is higher than the height of the protrusion.

[0014] According to a welding method for a layered frame-type sidewall unit provided by the present invention, the step of engaging the beam and the window frame on the upper surface of the wall panel mechanism with the engaging mold to form the beam-window frame mechanism specifically includes:

[0015] The locking mold is placed on the edge of the upper surface of the wall panel mechanism, the crossbeam and the window frame assembly are placed on the upper surface of the wall panel mechanism, and the crossbeam and the window frame assembly are snapped together with the locking mold to form a crossbeam and window frame mechanism.

[0016] According to a welding method for a layered frame-type sidewall unit provided by the present invention, the crossbeam includes an upper window crossbeam, a window crossbeam, and a lower window crossbeam. The positioning weld between the window crossbeam and the wall panel mechanism adopts single-point positioning, and the positioning weld between the upper window crossbeam and the lower window crossbeam and the wall panel mechanism adopts three-point positioning.

[0017] According to a welding method for a layered frame-type sidewall unit provided by the present invention, the positioning welding between the window frame assembly and the wall panel mechanism adopts eight-point positioning.

[0018] According to a welding method for a layered skeleton-type sidewall unit provided by the present invention, the beam-column assembly is stacked on top of the plate-beam assembly and welded to form the sidewall unit in a serpentine welding path.

[0019] According to a welding method for a layered frame-type sidewall unit provided by the present invention, the serpentine welding path is welded from the middle of the lower window beam toward the end of the lower window beam, and then serpentinely welded along the direction from the upper window beam to the lower window beam on the inter-window beam, and then welded from the middle of the upper window beam toward the end of the upper window beam.

[0020] The welding method for the layered skeleton-type sidewall unit provided in this invention determines the size and positioning of the clamping mold based on the layout of the beams and window frames in the sidewall unit. After the beams and window frames are clamped by the clamping mold, they can be placed in the precise design position. After the upper wall panel and lower wall panel are overlapped, the clamping mold is placed on the upper surface of the wall panel mechanism. At this time, not only can the beam and window frame mechanism and the wall panel mechanism be initially assembled, but the beam and window frame mechanism can also be placed in the corresponding position of the wall panel mechanism to further ensure the assembly accuracy. Then, the welding device is used to perform locating welding on the overlap of the upper wall panel and lower wall panel and the connection between the beam and window frame mechanism and the wall panel mechanism to ensure the accuracy of the locating welding. After the locating welding is completed, the clamping mold is removed and the plate and beam assembly is transferred to the forming welding area. The beam and column assembly is welded to the plate and beam assembly to form the sidewall unit. In this way, the welding accuracy between the beams, window frames, upper wall panels and lower wall panels can be ensured. During the locating welding process, there is no need to adjust the position of the beam and no need for operators to monitor the entire welding operation, saving labor costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic flowchart of the welding method for the layered frame sidewall unit provided by the present invention;

[0023] Figure 2 This is a front view of the side wall unit in the welding method of the layered skeleton side wall unit provided by the present invention;

[0024] Figure 3 This is a front view of the clamping mold in the welding method of the layered skeleton sidewall unit provided by the present invention;

[0025] Figure 4 This is a schematic diagram of the welding position for tack welding in the welding method of the layered skeleton sidewall unit provided by the present invention;

[0026] Figure 5 This is a welding path diagram for forming welding in the welding method of the layered skeleton sidewall unit provided by the present invention.

[0027] Figure label:

[0028] 10. Upper wall panel; 20. Lower wall panel; 310. Window upper beam; 320. Window sill beam; 330. Window lower beam; 40. Window frame components; 410. Beam body; 50. Mounting mold; 510. Protrusion. Detailed Implementation

[0029] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0030] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0032] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] The following is combined with Figures 1-5 Embodiments of the present invention are described.

[0035] like Figure 1 As shown, this embodiment provides a welding method for a layered frame-type sidewall unit, including the following steps:

[0036] S100. The upper wall panel 10 and the lower wall panel 20 are laid in the positioning welding area so that the upper wall panel 10 and the lower wall panel 20 overlap each other and form a wall panel structure.

[0037] S200. Based on the layout of the beam and window frame assembly 40 in the side wall unit, determine the size and positioning of the clamping mold 50 so that the beam and window frame assembly 40 is clamped onto the clamping mold 50 on the upper surface of the wall panel mechanism, and forms the beam and window frame mechanism.

[0038] S300, the overlapping joints of the upper wall panel 10 and the lower wall panel 20, as well as the connection between the beam window frame mechanism and the wall panel mechanism, are tack welded to form a plate beam assembly.

[0039] S400, after removing the clamping mold 50, transfer the plate beam assembly to the forming and welding area, stack the beam and column assembly on top of the plate beam assembly, and weld to form the side wall unit.

[0040] In this embodiment, the size and positioning of the locking mold 50 are determined based on the layout of the beam and window frame assembly 40 in the side wall unit. After the beam and window frame assembly 40 is locked in place by the locking mold 50, the beam and window frame assembly 40 can be placed in the precise design position. After the upper wall panel 10 and the lower wall panel 20 are overlapped, the locking mold 50 is placed on the upper surface of the wall panel mechanism. At this time, not only can the initial assembly of the beam and window frame mechanism and the wall panel mechanism be realized, but the beam and window frame mechanism can also be placed in the corresponding position of the wall panel mechanism, further ensuring the assembly accuracy. Then, the welding device is used to perform tack welding on the overlap of the upper wall panel 10 and the lower wall panel 20, as well as the connection between the beam window frame mechanism and the wall panel mechanism, to ensure the accuracy of the tack welding. After the tack welding is completed, the clamping mold 50 is removed and the plate beam assembly is transferred to the forming welding area. The beam column assembly is welded to the plate beam assembly to form the side wall unit. In this way, the welding accuracy between the beam, window frame assembly 40, upper wall panel 10 and lower wall panel 20 can be ensured. During the tack welding process, there is no need to adjust the position of the beam 410, and no need for operators to monitor the entire welding process, thus saving labor costs.

[0041] After the upper wall panel 10, lower wall panel 20, crossbeam, and window frame assembly 40 are assembled using the clamping mold 50, they are then tack welded to ensure the accuracy of the tack welding and to ensure that each component is in the precise position after forming. During the tack welding process, the clamping mold 50 can fix the position of the crossbeam and window frame assembly 40 at all times, ensuring that the upper wall panel 10, lower wall panel 20, crossbeam, and window frame assembly 40 do not move during the welding process, further guaranteeing the accuracy of the tack welding.

[0042] After the tack welding is completed, the clamping mold 50 is removed, and the plate beam assembly is transferred to the forming welding area. Then, the plate beam assembly is welded to the beam and column assembly to form the side wall unit. During the automatic welding process, there is no need for operators to monitor the welding operation, saving labor costs.

[0043] The tack welding area is a copper platform of a single-sided spot welding machine. The upper wall plate 10 and the lower wall plate 20 are laid on the copper platform of the single-sided spot welding machine to perform single-sided spot welding.

[0044] The upper wall panel 10 is used to connect the window frame assembly 40, and a window needs to be opened on the upper wall panel 10. When welding the beam-column assembly and the slab-beam assembly, the center of the window can be used as the positioning reference point, and welding can be carried out after positioning is completed.

[0045] The positioning references for the locking mold 50 and the wall panel mechanism are as follows: the locking mold 50 is flush with the lower edge of the lower wall panel 20, and the locking mold 50 is flush with the upper wall panel 10 and the lower wall panel 20.

[0046] The welding method for a layered frame sidewall unit according to an embodiment of the present invention, specifically includes the step of determining the size positioning of the clamping mold 50 based on the layout of the beams and window frames 40 in the sidewall unit, which includes:

[0047] Based on the number and spacing of the beams and window frames 40, corresponding protrusions 510 are provided along the length of the locking mold 50, and the protrusions 510 are adapted to the beams and window frames 40.

[0048] Based on the position, quantity, and spacing of the beams and window frames 40 in the design drawings, corresponding protrusions 510 are set along the length of the locking mold 50. The beams and window frames are then assembled and installed on the protrusions 510, thereby achieving precise assembly of the beams and window frames 40.

[0049] The protrusion 510 can be integrally formed into the clamping mold 50, or it can be fixed to the clamping mold 50 by welding, bolt connection or other means.

[0050] The locking mold 50 is located at the end of the crossbeam, and the protrusion 510 extends toward the crossbeam, with the end of the crossbeam engaging with the protrusion 510. By setting the locking mold 50 at the end of the crossbeam, the crossbeam is precisely fixed in position at both ends, and the locking mold 50 can be easily disassembled after the tack welding is completed.

[0051] The window frame assembly 40 includes a beam 410 extending towards the locking mold 50. Both the beam and the beam 410 are designed as cap-shaped beams and form locking grooves, which are suitable for engaging with the protrusion 510. The locking grooves are formed by the cap-shaped beams, with the grooves facing the protrusion 510, so that the cap-shaped beams can engage with the protrusion 510 through the grooves, thus achieving the assembly of the beam and the beam 410 with the locking mold 50.

[0052] The height of the slot is higher than the height of the protrusion 510. Specifically, the height of the protrusion 510 is 2mm lower than the height of the slot, thus preventing the protrusion 510 from lifting the cap-shaped beam, i.e., preventing the clamping mold 50 from lifting the crossbeam or window frame assembly 40 and affecting the flatness. Furthermore, the end of the protrusion 510 facing the slot is tapered, meaning that the opposite sides of the protrusion 510 have bevels with a bevel extension of 0.2mm, to facilitate clamping and improve assembly accuracy.

[0053] Among them, the size allowance of the upper wall panel 10 at the window is +1mm, and the size allowance of the window in the window frame assembly 40 is +2mm.

[0054] The welding method for the layered frame sidewall unit provided in the embodiment of the present invention, which involves the steps of engaging the beam and window frame assembly 40 on the upper surface of the wall panel mechanism with the engagement mold 50 to form the beam and window frame mechanism, specifically includes:

[0055] The locking mold 50 is placed on the edge of the upper surface of the wall panel mechanism, and the beam and window frame assembly 40 is placed on the upper surface of the wall panel mechanism. The beam and window frame assembly 40 is then snapped into the locking mold 50 to form the beam and window frame mechanism.

[0056] The upper wall panel 10 and the lower wall panel 20 are set at an angle. The locking mold 50 is also bent to adapt to the bending angle between the upper wall panel 10 and the lower wall panel 20. The locking mold 50 is set on the upper surface of the upper wall panel 10 and the lower wall panel 20, so that the locking mold 50 fits with the upper surface of the upper wall panel 10 and the lower wall panel 20.

[0057] Specifically, there are two clamping molds 50, which are located on both sides of the upper surface of the wall panel mechanism, so that the two ends of the crossbeam can be clamped and fixed by the clamping molds 50 respectively, thus achieving precise fixation of the crossbeam.

[0058] The locking mold 50 is located at the edge of the upper surface of the wall panel mechanism, thereby limiting and fixing the beam and window frame assembly 40 on both sides. This setting also allows for the reservation of edge gaps between the wall panel mechanism and the beam and window frame assembly 40 to facilitate subsequent assembly.

[0059] like Figure 2 and Figure 4 As shown, the crossbeams include an upper window crossbeam 310, a middle window crossbeam 320, and a lower window crossbeam 330. The locating weld between the middle window crossbeam 320 and the wall panel mechanism uses single-point locating, while the locating welds between the upper window crossbeam 310 and the lower window crossbeam 330 and the wall panel mechanism use three-point locating. The locating welds between the window frame assembly 40 and the wall panel mechanism use eight-point locating. This ensures the secure positioning of the middle window crossbeam 320, the upper window crossbeam 310 and the lower window crossbeam 330, and the window frame assembly 40, all within the wall panel mechanism.

[0060] In this embodiment, the beam-column assembly is stacked on top of the slab-beam assembly and welded to form the side wall unit. The welding path is a serpentine welding path to ensure the reliability and strength of the welding after automatic welding and to facilitate the movement of the automated welding equipment.

[0061] like Figure 5 As shown, the serpentine welding path welds from the middle of the lower window beam 330 toward the end of the lower window beam 330, and then serpentinely welds along the direction from the upper window beam 310 to the lower window beam 330 in the window beam 320. Finally, it welds from the middle of the upper window beam 310 toward the end of the upper window beam 310 to ensure the reliability and strength of the welding after automatic welding, and to facilitate the movement of the automated welding equipment.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding method for a layered frame-type sidewall unit, characterized in that, Includes the following steps: The upper and lower wall panels are laid in the positioning welding area so that the upper and lower wall panels overlap each other and form a wall panel structure. The size and positioning of the locking mold are determined based on the layout of the beams and window frames in the side wall unit, so that the beams and window frames are locked onto the locking mold on the upper surface of the wall panel mechanism, forming a beam and window frame mechanism. The overlapping joints of the upper wall panel and the lower wall panel, as well as the connection between the crossbeam window frame mechanism and the wall panel mechanism, are tack welded to form a plate-beam assembly. After removing the card mold, the plate beam assembly is transferred to the forming and welding area, the beam and column assembly is stacked on top of the plate beam assembly, and welded to form the side wall unit.

2. The welding method for the layered frame sidewall unit according to claim 1, characterized in that, The steps for determining the size positioning of the card template based on the layout of the beams and window frames in the side wall unit specifically include: Based on the number and spacing of the beams and window frames, corresponding protrusions are provided along the length of the locking mold, and the protrusions are adapted to the beams and window frames.

3. The welding method for the layered frame-type sidewall unit according to claim 2, characterized in that, The locking mold is located at the end of the crossbeam, the protrusion extends toward the crossbeam, and the end of the crossbeam is engaged with the protrusion.

4. The welding method for the layered frame sidewall unit according to claim 3, characterized in that, The window frame has a beam extending toward the latching mold. Both the beam and the beam are configured as hat-shaped beams and form a latching groove, which is adapted to engage with the protrusion.

5. The welding method for the layered frame sidewall unit according to claim 4, characterized in that, The height of the slot is higher than the height of the protrusion.

6. The welding method for the layered frame sidewall unit according to any one of claims 1-5, characterized in that, The step of engaging the beam and the window frame onto the upper surface of the wall panel mechanism using the locking mold to form the beam-window frame mechanism specifically includes: The locking mold is placed on the edge of the upper surface of the wall panel mechanism, the crossbeam and the window frame assembly are placed on the upper surface of the wall panel mechanism, and the crossbeam and the window frame assembly are snapped together with the locking mold to form the crossbeam and window frame mechanism.

7. The welding method for the layered frame sidewall unit according to claim 6, characterized in that, The crossbeams include an upper window crossbeam, a middle window crossbeam, and a lower window crossbeam. The positioning weld between the middle window crossbeam and the wall panel mechanism adopts single-point positioning, while the positioning weld between the upper window crossbeam and the lower window crossbeam and the wall panel mechanism adopts three-point positioning.

8. The welding method for the layered frame sidewall unit according to claim 7, characterized in that, The positioning welding between the window frame assembly and the wall panel mechanism adopts eight-point positioning.

9. The welding method for the layered frame sidewall unit according to claim 7, characterized in that, The beam-column assembly is stacked on top of the plate-beam assembly and welded to form the side wall unit. The welding path is a serpentine welding path.

10. The welding method for the layered frame sidewall unit according to claim 9, characterized in that, The serpentine welding path is welded from the middle of the lower window beam toward the end of the lower window beam, and then serpentinely welded along the direction from the upper window beam to the lower window beam on the inter-window beam, and then welded from the middle of the upper window beam toward the end of the upper window beam.

Images