A method for controlling welding deformation of Z-shaped aluminum alloy structural parts

Abstract

The present invention discloses a method for controlling the welding deformation of a Z-shaped aluminum alloy structural part, relates to the field of welding deformation control, solves the problem of welding deformation of existing large Z-shaped aluminum alloy structural parts, and comprises the following steps: 1) taking anti-deformation measures on the aluminum alloy component to clarify the welding deformation position and anti-deformation amount of the aluminum alloy structural part; 2) positioning and pressing the aluminum alloy structural part through a welding device before welding according to the anti-deformation amount in step 1), specifically comprising the following steps; 3) welding the upper side plate, the horizontal plate, and the lower side plate by a double-wire consumable electrode argon arc automatic welding process, and meeting the angle requirements; in the present invention, after clarifying the welding deformation position and anti-deformation amount of the aluminum alloy structural part, the welding device can be used to accurately position, laterally clamp, and longitudinally press the aluminum alloy structural part, and the welding device can maintain the shape of the aluminum alloy structural part after welding, so that the problem of welding deformation of the aluminum alloy structural part is controlled after welding.

Description

Technical Field

[0001] The present invention relates to the field of welding deformation control, and more particularly to the technical field of a method for controlling welding deformation of a Z-shaped aluminum alloy structural part. Background Art

[0002] Aluminum alloy, with its advantages of low density, excellent corrosion resistance, and comprehensive mechanical properties, is an effective way to achieve lightweight products. It is widely used in industries such as special vehicles, rail transit, shipbuilding, and the chemical industry. Most large and medium-sized aluminum alloy components require welding processes to produce. Large Z-shaped aluminum alloy structures have four corner joints with a maximum length of 29.5 meters. These large dimensions, large weld grooves, and high heat input are characteristic of these structures. Aluminum alloys, with their high coefficient of linear expansion and rapid thermal conductivity, lead to significant deformation after welding. Analysis of deformation data reveals that aluminum alloy structures are prone to shrinkage and bending deformation after welding. These deformations reduce the angle between the horizontal plate and the lower plate, and cause bending deformation with a low center and high ends. These deformations significantly impact the overall dimensions and performance of the product, presenting a significant technical challenge in the production process. Therefore, adopting scientific welding techniques to effectively prevent deformation in large Z-shaped aluminum alloy structures, ensure product quality, improve production efficiency, and reduce production costs has become a critical technical challenge in welding production. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problem of welding deformation of existing large Z-shaped aluminum alloy structural parts, and to provide a method for controlling welding deformation of Z-shaped aluminum alloy structural parts.

[0004] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0005] A method for controlling welding deformation of a Z-shaped aluminum alloy structural part comprises the following steps:

[0006] 1) Take anti-deformation measures on aluminum alloy components and clarify the welding deformation position and anti-deformation amount of aluminum alloy structural parts;

[0007] 2) Positioning and pressing the aluminum alloy structural member before welding using a welding device according to the reverse deformation amount in step 1), specifically comprising the following steps;

[0008] A. Use the welding device to accurately position the upper side plate, horizontal plate and lower side plate of the aluminum alloy structure;

[0009] B. Use the welding device to position and press the upper side plate, horizontal plate and lower side plate of the aluminum alloy structure;

[0010] C. Use the anti-deformation angle detection aid to detect the anti-deformation angle;

[0011] 3) Use the double-wire consumable electrode argon arc automatic welding process to weld the upper side plate, horizontal plate, and lower side plate to meet the angle requirements. The specific steps include:

[0012] A. Weld the outer fillet weld first, using one layer of weld;

[0013] B. Then weld the inner fillet weld, which uses two layers of welds;

[0014] C. Maintain shape after welding;

[0015] D. After 40 minutes, dismantle the welding device and spot weld the process ribs between the horizontal plate and the lower side plate.

[0016] Step 1) includes the following steps:

[0017] A. Through the simulation analysis of welding deformation of aluminum alloy structural parts;

[0018] B. Carry out simulation calculation of deformation and extract deformation position and deformation angle of aluminum alloy structural parts;

[0019] C. Obtain the welding deformation position and reverse deformation amount of aluminum alloy structural parts;

[0020] The angle requirement is that the angle between the horizontal plate and the lower side plate ranges from 90° to 90.8°.

[0021] The assembly welding device includes a first group of support beams and a second group of support beams. The horizontal line of the first group of support beams is higher than the horizontal line of the second group of support beams. The first group of support beams and the second group of support beams are respectively hinged with a first group of positioning plates and a second group of positioning plates. The first group of positioning plates and the second group of positioning plates are respectively hinged with a longitudinal clamping beam group. The longitudinal clamping beam group is provided with a longitudinal clamping seat. The first group of support beams and the second group of support beams are respectively provided with the same side plate group on both sides. A detachable horizontal clamping beam is provided on the side plate group. A horizontal clamping seat is provided on the horizontal clamping beam. The first group of positioning plates and the second group of positioning plates are respectively provided with a transverse clamping plate.

[0022] The horizontal line of the horizontal compression beam is lower than the first group of support beams and higher than the second group of support beams.

[0023] The structures of the first and second groups of support beams are the same, and a side bending control pressing seat is provided on the first group of support beams.

[0024] The side bending control pressing seat comprises a pressing block, and the internal thread of the pressing block is connected with a pressing bolt.

[0025] The longitudinal pressing seat has the same structure as the horizontal pressing seat. The longitudinal pressing seat includes an adjusting screw threadedly connected to the longitudinal pressing beam group. The extending end of the adjusting screw is sequentially provided with a rotating block and a pressing plate.

[0026] A horizontal support plate is provided between the first group of support beams and the second group of support beams, and an angle positioning plate is provided on the horizontal support plate.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. In the present invention, after the welding deformation position and the amount of reverse deformation of the aluminum alloy structural part are clearly defined, the aluminum alloy structural part can be accurately positioned, laterally clamped, and longitudinally pressed by the assembly welding device to adjust different positioning angles of the welding point. During the welding process, the reverse deformation angle detection auxiliary tool can detect the reverse deformation angle at any time, and the assembly welding device can maintain the shape of the aluminum alloy structural part after welding, so the problem of welding deformation of the aluminum alloy structural part is controlled after welding.

[0029] 2. In the present invention, since the twin-wire consumable electrode argon arc automatic welding process has the characteristics of high energy density, high thermal efficiency and small welding heat affected zone, it can control welding deformation and improve production efficiency.

[0030] 3. In the present invention, before welding, the welding device can ensure that the surface of the aluminum alloy structural part is completely fitted and clamped with the first and second positioning plates, and after welding, the aluminum alloy structural part can be kept in shape, so that welding deformation can be effectively controlled.

[0031] 4. In the present invention, the spot welding ribs between the horizontal plate and the lower side plate can effectively control welding deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of the welding device;

[0033] Figure 2 yes Figure 1 Schematic diagram of the structure of AA;

[0034] Figure 3 It is a structural diagram of the fixed frame and the horizontal compression beam;

[0035] Figure 4 yes Figure 3 A partial enlarged view of middle A;

[0036] Figure 5 It is a structural diagram of the longitudinal pressing seat;

[0037] Figure 6 This is a structural diagram of the side bending control pressing seat;

[0038] Figure 7 It is an auxiliary tool for detecting the angle of anti-deformation assembly;

[0039] Figure 8 It is a structural diagram of aluminum alloy structural parts;

[0040] Figure 9yes Figure 8 Schematic diagram of welding sequence;

[0041] Figure 10 yes Figure 8 Schematic diagram of welding direction;

[0042] Figure 11 yes Figure 10 Left view of;

[0043] Figure 12 yes Figure 11 Right view:

[0044] Figure 13 It is a schematic diagram of the connection between the aluminum alloy structural parts and the process ribs;

[0045] Figure 14 It is the total deformation distribution diagram of aluminum alloy structural parts after welding;

[0046] Figure 15 It is the deformation distribution diagram of aluminum alloy structural parts in the Y direction;

[0047] Figure numerals: 11 side plate group, 12 supporting beam group 2, 121 reinforcing ribs, 13 positioning plate group 2, 131 adjustment pad, 14 longitudinal clamping beam group, 15 longitudinal clamping seat, 151 adjustment screw, 152 rotating block, 153 clamping plate, 16 transverse clamping plate, 17 fixing frame, 171 mounting bolt, 18 horizontal clamping beam, 181 horizontal clamping seat, 19 supporting beam group 1, 20 positioning plate group, 21 aluminum alloy structural part, 211 upper side plate, 212 horizontal plate, 213 lower side plate, 214 outer corner weld, 215 inner corner weld, 216 welding direction, 22 angle positioning plate, 23 horizontal support plate, 24 anti-deformation angle detection auxiliary tool, 25 process ribs, 26 lateral bending control clamping seat, 261 clamping block, 262 clamping bolt. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0050] Example 1

[0051] like Figures 1 to 15 As shown, this embodiment provides a method for controlling welding deformation of a Z-shaped aluminum alloy structural part, comprising the following steps:

[0052] 1) Taking anti-deformation measures on the aluminum alloy component to determine the welding deformation position and anti-deformation amount of the aluminum alloy structural component 21, specifically including the following steps:

[0053] A. Through the simulation analysis of the welding deformation of the aluminum alloy structural member 21, the following steps are specifically included:

[0054] a. Create a 3D model of the aluminum alloy structural part 21 and import it into the HyperMesh application software to implement meshing technology;

[0055] b. Import the meshed 3D model into Simufact.Welding welding simulation software; the finite element model of the 3D model of the aluminum alloy structural part 21 is divided into hexahedral eight-node elements, and the element refinement level used near the weld and heat-affected zone is level 1;

[0056] B. Performing a simulation calculation of the deformation amount to extract the deformation position and deformation angle of the aluminum alloy structural member 21, specifically including the following steps:

[0057] a. Figure 14 As shown, after welding, due to the instantaneous and localized concentration of the welding heat source, the aluminum alloy structural member 21 is heated extremely unevenly during welding. The expansion of the high-temperature heated metal is hindered by the surrounding low temperature. During the cooling after welding, the metal contracts unevenly at different positions, resulting in deformation at the weld of the aluminum alloy structural member 21.

[0058] b. Figure 14 As shown, the deformation pattern of the upper plate 211, the horizontal plate 212, and the lower plate 213 of the aluminum alloy structural member 21 during the entire welding process is as follows: at the end of welding, the boundary constraints of the welding are removed, and the aluminum alloy structural member 21 is freely cooled and deformed. The deformation of the upper plate 211 and the lower plate 213 in the middle, farthest from the weld, is relatively large. After a certain period of time, the deformation of the aluminum alloy structural member 21 tends to be stable and remains basically unchanged.

[0059] c. Figure 15 As shown in the figure, the deformation distribution of the upper side plate 211 and the lower side plate 213 in the Y direction is set to a magnification factor of 10. It can be seen from the figure that after the constraint is removed, the aluminum alloy structural member 21 is deformed by free cooling. In the Y direction, the deformation mainly occurs on both sides of the upper side plate 211 and the lower side plate 213. The upper side plate 211 and the lower side plate 213 experience large angular deformation and warping deformation, and the middle horizontal plate 212 experiences large angular deformation.

[0060] d. Before welding, the angles between the lower side plate 213 and the horizontal plate 212 are all 90°. In order to more intuitively display the angular deformation of the upper side plate 211, the lower side plate 213 and the horizontal plate 212 after welding, the front, middle and tail sections of the welding point between the horizontal plate 212 and the lower side plate 213 are respectively cut, and the outer angles of the horizontal plate 212 and the lower side plate 213 after welding are measured at the three interfaces. The angle parameter table of the characteristic points of the cross section after welding is as follows:

[0061] As shown in Table 1,

[0062] Part Angle between horizontal plate and lower side plate (°) Section 1 (front) 88.9° Section 2 (middle) 89.2° Section 3 (tail) 89.0°

[0063] Table 1

[0064] Analyzing the post-weld deformation, the angles between the horizontal plate 212 and the lower side plate 213 decreased from 90° before welding to approximately 89° after welding. The angular deformation was minimal in Section 2 (the middle), and maximal in Section 1 (the front). This is due to the significant temperature gradient variation at the front and rear ends of the aluminum alloy structural member 21 after welding, as well as the fact that the ends were subject to less restraint during cooling than the middle section, resulting in warping at both ends.

[0065] C. Obtaining the welding deformation position and reverse deformation amount of the aluminum alloy structural member 21;

[0066] 2) Positioning and pressing the aluminum alloy structural member 21 by a welding device before welding according to the reverse deformation amount in step 1), specifically comprising the following steps;

[0067] A. Figure 1 As shown, the upper side plate 211, the horizontal plate 212, and the lower side plate 213 of the aluminum alloy structural member 21 are precisely positioned using a group of positioning plates 20, a horizontal support plate 25, and a second group of positioning plates 13 of the assembly welding device;

[0068] B. Figure 1 As shown, the upper side plate 211, the horizontal plate 212, and the lower side plate 213 of the aluminum alloy structural member 21 are longitudinally and transversely compressed by using the longitudinal compression beam group 14, the horizontal compression beam 18, and the transverse compression plate 16 of the assembly welding device;

[0069] C. Use the anti-deformation angle detection tool 24 to detect the anti-deformation angle.

[0070] 3) Using a double-wire consumable electrode argon arc automatic welding process to weld the upper side plate 211, the horizontal plate 212, and the lower side plate 213, and ensuring that the angle between the horizontal plate 212 and the lower side plate 213 is within a range of 90° to 90.8°, specifically comprising the following steps:

[0071] A. Use the anti-deformation angle detection aid 24 to detect the anti-deformation angle;

[0072] B. Figure 9 As shown, the outer fillet weld 214 is welded first, and the outer fillet weld 214 adopts a single layer of weld;

[0073] C. Figures 9-12 As shown, the inner fillet weld 215 is welded, and the inner fillet weld 215 adopts two layers of welds, so that the initial welding angle of the front of the horizontal plate 212 and the lower side plate 213 is 91.3 degrees, and the initial angle of the rear is 91 degrees;

[0074] D. Maintain shape after welding;

[0075] E. Such as Figure 13 As shown, after 40 minutes, the welding device is disassembled and three process ribs 25 are spot-welded at the front, middle and tail of the horizontal plate 212 and the lower side plate 213. At this time, the welding angle of the front of the horizontal plate 212 and the lower side plate 213 is 90.2°, and the welding angle of the tail is 90.3°.

[0076] Specifically, the angle range between the horizontal plate 212 and the upper plate 211 and the welding test data are consistent with the angle range between the horizontal plate 212 and the lower plate 213 and the welding test data.

[0077] This embodiment also uses 20 aluminum alloy structural parts 21 for experiments. After welding, the angles are measured using an angle measuring instrument. The angles are all controlled within the range of 90° to 90.8°. The specific angle data table of the 20 aluminum alloy structural parts 21 is shown in Table 2.

[0078]

[0079]

[0080] Table 2

[0081] In this embodiment, the assembly welding device can not only accurately position, laterally clamp, and directionally press the aluminum alloy structural member 21, but also adjust the welding angle between the upper side plate 211, the horizontal plate 212, and the lower side plate 213 through the assembly welding device, thereby avoiding excessive angles and controlling the angular deformation of the weld within the angle range. The use of a double-wire consumable electrode argon arc automatic welding process to weld the aluminum alloy structural member 21 and the spot welding process rib 25 between the horizontal plate 212 and the lower side plate 213 after maintaining the shape can effectively control welding deformation.

[0082] Specifically, the twin-wire consumable electrode argon arc automatic welding process is an existing technology, so it will not be described here in detail.

[0083] Example 2

[0084] like Figures 1 to 13As shown, on the basis of Example 1, this embodiment provides a welding device including a group of support beams 19 and a group of support beams 12. The horizontal line of the group of support beams 19 is higher than the horizontal line of the group of support beams 12. The group of support beams 19 and the group of support beams 12 are respectively hinged with a group of positioning plates 20 and a group of positioning plates 13. The group of positioning plates 20 and the group of positioning plates 13 are respectively hinged with a longitudinal clamping beam group 14. The longitudinal clamping beam group 14 is provided with a longitudinal clamping seat 15. The same side plate group 11 is provided on both sides of the group of support beams 19 and the group of support beams 12. A detachable horizontal clamping beam 18 is provided on the side plate group 11. A horizontal clamping seat 181 is provided on the horizontal clamping beam 18. The group of positioning plates 20 and the group of positioning plates 13 are respectively provided with a transverse clamping plate 16.

[0085] Among them, the group welding device can play a fixing role when welding the aluminum alloy structural part 21, and play a shape-preserving role after welding, which can effectively control welding deformation; the upper side plate 211 and the lower side plate 213 of the aluminum alloy structural part 21 are respectively placed on the first group of positioning plates 20 and the second group of positioning plates 13, and the horizontal plate 212 is placed between the first group of support beams 19 and the horizontal pressing beam 18, and then the longitudinal pressing beam group 14 is rotated toward the upper side plate 211 and the lower side plate 213 respectively, and then the longitudinal pressing seat 15 is adjusted according to the distance so that The upper side plate 211 and the lower side plate 213 are subjected to the longitudinal clamping force, and the transverse pressure plate 16 located between the first group of positioning plates 20 and the longitudinal pressing seat 15 can make the upper side plate 211 subjected to the transverse clamping force, and the transverse pressure plate 16 located between the second group of positioning plates 13 and the longitudinal pressing seat 15 can make the lower side plate 213 subjected to the transverse clamping force, and the horizontal pressing seat 181 is adjusted so that the horizontal plate 212 is subjected to the positioning and pressing force, thereby controlling the positions of the upper side plate 211, the horizontal plate 212 and the lower side plate 213.

[0086] Preferably, the horizontal line of the horizontal compression beam 18 is lower than the first group of support beams 19 and higher than the second group of support beams 12 .

[0087] Among them, the horizontal line of the horizontal pressing beam 18 is lower than the first group of support beams 19 and higher than the second group of support beams 12, so that the horizontal pressing seat 181 can be positioned to press the horizontal plate 212.

[0088] Preferably, the structures of the first group of support beams 19 and the second group of support beams 12 are consistent, and the first group of support beams 19 is provided with a side bending control pressing seat 26.

[0089] Among them, the lateral bending control pressing seat 26 prevents the upper side plate 211 and the lower side plate 213 from lateral bending; the lateral bending control pressing seat 26 on both sides of the first group of support beams 19 presses downward, and the lateral bending control pressing seat 26 in the middle position of the second group of support beams 12 presses upward.

[0090] Preferably, the lateral bending control pressing seat 26 includes a pressing block 261 , and the pressing block 261 is internally threaded with a pressing bolt 262 .

[0091] Among them, the length of the clamping bolt 262 is adjusted according to the specific situation, which increases convenience.

[0092] Preferably, the longitudinal pressing seat 15 has the same structure as the horizontal pressing seat 181. The longitudinal pressing seat 15 includes an adjusting screw 151 threadedly connected to the longitudinal pressing beam group 14. The extending end of the adjusting screw 151 is provided with a rotating block 152 and a pressing plate 153 in sequence.

[0093] Among them, by adjusting the adjustment screw 151, the clamping plate 153 can be clamped laterally on the upper side plate 211, and the clamping plate 153 can be positioned to clamp the horizontal plate 212, which increases convenience; the clamping plate 153 can be but is not limited to a nylon clamping plate.

[0094] Preferably, a horizontal support plate 23 is provided between the first group of support beams 19 and the second group of support beams 12 , and an angle positioning plate 22 is provided on the horizontal support plate 23 .

[0095] The horizontal support plate 23 can provide positioning support for the angle positioning plate 22 , and the angle positioning plate 22 can ensure the angle of the welding point when the horizontal plate 212 and the lower side plate 213 are welded.

[0096] Preferably, a group of support beams 19 includes two support beams 1, and the two support beams 1 are fixed by reinforcing ribs 121.

[0097] The reinforcing ribs 121 can connect the two supporting beams 1, making the entire structure more stable.

[0098] Preferably, a group of positioning plates 20 includes multiple positioning plates 1 that are evenly distributed on the support beam 1.

[0099] The first positioning plate can support the upper side plate 211 .

[0100] Preferably, the second group of positioning plates 13 includes multiple positioning plates 2 that are evenly distributed on the second support beam.

[0101] The second positioning plate can support the lower side plate 213 .

[0102] Preferably, a detachable adjustment pad 131 is provided on the first group of positioning plates 20 and the second group of positioning plates 13 .

[0103] The adjustment pad 131 is replaced to adapt to different product solder mask requirements, thereby achieving flexibility of the tooling.

[0104] Preferably, the side panel group 11 includes two side panels, each of which is provided with a fixing frame 17 , and a horizontal pressing beam 18 is connected to the fixing frame 17 via mounting screws.

[0105] The horizontal pressing beam 18 is detachable, making it easier for workers to take the aluminum alloy structural member 21 .

[0106] Specifically, the longitudinal compression beam 14 , the horizontal compression beam 18 and the transverse compression plate 16 are made of aluminum alloy material with a lightweight design.

Claims

1. A method for controlling welding deformation of a Z-shaped aluminum alloy structural part, characterized in that: The following steps are involved: 1) Take anti-deformation measures on aluminum alloy components and clarify the welding deformation position and anti-deformation amount of aluminum alloy structural parts (21); 2) positioning and pressing the aluminum alloy structural member (21) before welding by means of a welding device according to the reverse deformation amount in step 1), specifically comprising the following steps; A. Using a welding device to accurately position the upper side plate (211), the horizontal plate (212), and the lower side plate (213) of the aluminum alloy structural member (21); B. Using a welding device to perform longitudinal and transverse compression on the upper side plate (211), the horizontal plate (212), and the lower side plate (213) of the aluminum alloy structural member (21); C. Using the anti-deformation angle detection aid (24) to detect the anti-deformation angle; 3) Using a double-wire consumable electrode argon arc automatic welding process to weld the upper side plate (211), the horizontal plate (212), and the lower side plate (213) to meet the angle requirements, specifically comprising the following steps: A. First, weld the outer corner weld (214), wherein the outer corner weld (214) is a single-layer weld; B. welding the inner fillet weld (215), wherein the inner fillet weld (215) is a two-layer weld; C. Maintain shape after welding; D. After 40 minutes, disassemble the welding device and spot weld the process rib (25) between the horizontal plate (212) and the lower side plate (213); The assembly welding device comprises a first support beam group (19) and a second support beam group (12), wherein the horizontal line of the first support beam group (19) is higher than the horizontal line of the second support beam group (12), and the first support beam group (19) and the second support beam group (12) are respectively hinged with a first positioning plate group (20) and a second positioning plate group (13), and the first positioning plate group (20) and the second positioning plate group (13) are respectively hinged with a longitudinal pressing beam group (14), and a longitudinal pressing seat (15) is provided on the longitudinal pressing beam group (14), and the first support beam group (19) and the second support beam group (12) are respectively provided with the same side plate group (11) on both sides, and a detachably mounted horizontal pressing beam (18) is provided on the side plate group (11), and a horizontal pressing seat (181) is provided on the horizontal pressing beam (18), and the first positioning plate group (20) and the second positioning plate group (13) are respectively provided with a transverse pressing plate (16).

2. The method for controlling welding deformation of a Z-shaped aluminum alloy structural part according to claim 1, wherein: The step 1) comprises the following steps: A. Through the simulation analysis of welding deformation of aluminum alloy structural parts (21); B. Performing simulation calculation of deformation amount and extracting deformation position and deformation angle of aluminum alloy structural part (21); C. Obtain the welding deformation position and reverse deformation amount of the aluminum alloy structural part (21).

3. The method for controlling welding deformation of a Z-shaped aluminum alloy structural member according to claim 1, wherein: The angle requirement is that the angle between the horizontal plate (212) and the lower side plate (213) ranges from 90° to 90.8°.

4. The method for controlling welding deformation of a Z-shaped aluminum alloy structural member according to claim 1, wherein: The horizontal line of the horizontal pressing beam (18) is lower than the first group of support beams (19) and higher than the second group of support beams (12).

5. The method for controlling welding deformation of a Z-shaped aluminum alloy structural member according to claim 1, wherein: The structures of the first group of support beams (19) and the second group of support beams (12) are consistent, and a side bending control pressing seat (26) is provided on the first group of support beams (19).

6. The method for controlling welding deformation of a Z-shaped aluminum alloy structural member according to claim 5, characterized in that: The side bending control pressing seat (26) comprises a pressing block (261), and the pressing block (261) is internally threadedly connected to a pressing bolt (262).

7. The method for controlling welding deformation of a Z-shaped aluminum alloy structural member according to claim 1, wherein: The longitudinal pressing seat (15) has the same structure as the horizontal pressing seat. The longitudinal pressing seat (15) comprises an adjusting screw (151) threadedly connected to the longitudinal pressing beam group (14). The extending end of the adjusting screw (151) is provided with a rotating block (152) and a pressing plate (153) in sequence.

8. The method for controlling welding deformation of a Z-shaped aluminum alloy structural member according to claim 1, wherein: A horizontal support plate (23) is provided between the first support beam group (19) and the second support beam group (12), and an angle positioning plate (22) is provided on the horizontal support plate (23).

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