Welding method and welding system for controlling welding distortion of a box-shaped structure

Abstract

The application discloses a welding method and a welding system for controlling welding deformation of a box type structure, and the welding method comprises the following steps: fixing and clamping a first side plate and a second side plate in a relative interval, and placing the lower ends of the first side plate and the second side plate on a bottom plate; respectively performing full welding on the joint of the bottom plate and the two side plates from the inner side; fixing and clamping a cover plate on the upper ends of the first side plate and the second side plate; respectively performing spot welding on the joint of the cover plate and the two side plates to form a first pre-assembled box type structure; respectively performing close support clamping on the first side plate and the second side plate in the inner cavity of the first pre-assembled box type structure; respectively performing full welding on the joint of the bottom plate, the cover plate and the two side plates from the outer side to form a second pre-assembled box type structure; and respectively performing full welding on the joint of the cover plate and the two side plates from the inner side of the second pre-assembled box type structure to form a finished box type structure. Therefore, the welding of the box type structure can be completed without setting a process plate, and the close support clamping mode in the application can obviously control the deformation of a larger area.

Description

Technical Field

[0001] This invention belongs to the field of box-type structure welding technology, specifically relating to a welding method and welding system for controlling welding deformation of box-type structures. Background Technology

[0002] In construction machinery, box-type structures are frequently used, such as movable outrigger boxes and fixed outrigger boxes. Their quality not only affects the difficulty of vehicle assembly but also, to some extent, the overall vehicle performance. For these hollow box-type structures, without any internal support, direct welding will result in greater deformation and compromise important dimensions, including the internal cavity size.

[0003] Currently, process plates are generally used to control deformation during welding. These process plates are placed inside the box-shaped structure, with their left and right ends welded to the two side plates of the box-shaped structure, respectively. The specific welding steps are as follows: after the first side plate is placed on the base plate, one side of the process plate is tack welded to the first side plate; after the second side plate is placed on the base plate, the other side of the process plate is tack welded to the second side plate to complete the welding of the process plate within the box-shaped structure; the inner and outer welds of the box-shaped structure are then welded with the support of the process plate. However, a single process plate can only control deformation in a localized area, and removing the process plate requires external force; improper force application can easily lead to deformation of the box-shaped structure. Summary of the Invention

[0004] To address the aforementioned defects or deficiencies, this invention provides a welding method and welding system for controlling welding deformation of box-type structures, aiming to solve the technical problems in the prior art where the use of process plates can only control deformation in local areas and that the removal of process plates can easily lead to deformation.

[0005] To achieve the above objectives, the present invention provides a welding method for controlling welding deformation of box-shaped structures, wherein the welding method includes:

[0006] The first and second side plates are fixedly clamped at intervals and their lower ends are placed on the base plate.

[0007] Full welding is performed at the joints between the base plate and the first side plate, and at the joints between the base plate and the second side plate, from the inside.

[0008] The cover plate is fixedly clamped onto the upper end of the first and second side plates;

[0009] Spot welding is performed at the joints between the cover plate and the first side plate, and at the joints between the cover plate and the second side plate, to form the first pre-assembled box structure.

[0010] The first side plate and the second side plate are respectively fitted, supported and clamped in the inner cavity of the first pre-assembled box structure.

[0011] The bottom plate and the first side plate, the bottom plate and the second side plate, the cover plate and the first side plate, and the cover plate and the second side plate are fully welded from the outside to form the second pre-assembled box structure.

[0012] Full welding is performed on the joints between the cover plate and the first side plate, and between the cover plate and the second side plate, from the inside of the second pre-assembled box structure to form the finished box structure.

[0013] In this embodiment of the invention, fixing the first side plate and the second side plate at a relative interval with their lower ends both resting on the base plate includes:

[0014] Place the base plate on the assembly platform of the assembly tooling;

[0015] The control group uses the centering and clamping mechanism of the tooling to center and clamp the base plate from both the left and right ends;

[0016] The first side plate and the second side plate are placed on the first magnetic suction component and the second magnetic suction component of the centering clamping mechanism in a corresponding manner, so that the lower ends of the first side plate and the second side plate are respectively attached to the side of the base plate away from the assembly platform. The first magnetic suction component and the second magnetic suction component are respectively located at the left and right ends of the centering clamping mechanism.

[0017] In this embodiment of the invention, after the control group centers and clamps the tooling clamping mechanism to fix the base plate from both the left and right ends, it further includes:

[0018] The first pressing component and the second pressing component of the centering clamping mechanism press the left and right ends of the base plate onto the assembly platform in a corresponding manner. The first pressing component and the second pressing component are respectively located at the left and right ends of the centering clamping mechanism.

[0019] In this embodiment of the invention, fixing the cover plate to the upper end of the first side plate and the second side plate includes:

[0020] Place the cover plate on top of the first and second side plates;

[0021] The third and fourth pressing components of the centering clamping mechanism press the left and right ends of the cover plate onto the first and second side plates respectively. The third and fourth pressing components are respectively located at the left and right ends of the centering clamping mechanism.

[0022] In an embodiment of the invention, the fitting and support clamping of the first side plate and the second side plate within the inner cavity of the first pre-assembled box structure includes:

[0023] The first pre-assembled box-type structure is fixedly mounted on the membrane tooling;

[0024] The width adjustment mechanism of the control membrane tooling adjusts the width of the two support beams so that the two support beams are respectively fitted to the inner walls of the first side plate and the second side plate.

[0025] To achieve the above objectives, the present invention also provides a welding system, wherein the welding system is applied to the welding method for controlling the welding deformation of a box-shaped structure as described above, and includes an assembly fixture and a mold fixture. The assembly fixture is used to fix and clamp the first side plate and the second side plate at a relative interval with their lower ends both placed on the bottom plate, and to fix and clamp the cover plate on the upper ends of the first side plate and the second side plate. The mold fixture is used to fit and support the first side plate and the second side plate from the inner cavity of the first pre-assembled box-shaped structure.

[0026] In this embodiment of the invention, the assembly tooling includes an assembly platform and a centering clamping mechanism. The centering clamping mechanism includes a centering drive assembly, a first magnetic suction component, a second magnetic suction component, a third pressing assembly, a fourth pressing assembly, and two centering drive seats. The two centering drive seats are respectively disposed on the left and right sides of the assembly platform. The centering drive assembly is drivenly connected to the two centering drive seats and is used to drive the two centering drive seats to approach each other to center and clamp the bottom plate from the left and right ends of the bottom plate. The first magnetic suction component and the second magnetic suction component are respectively disposed on the two centering drive seats and are used to magnetically clamp and fix the first side plate and the second side plate respectively. The third pressing assembly and the fourth pressing assembly are respectively disposed on the two centering drive seats and are used to press the left and right ends of the cover plate respectively onto the first side plate and the second side plate.

[0027] In this embodiment of the invention, the centering clamping mechanism further includes a first pressing component and a second pressing component. The first pressing component and the second pressing component are respectively disposed on two centering drive seats and are used to press the left and right ends of the base plate onto the assembly platform respectively.

[0028] In this embodiment of the invention, the fetal membrane tooling includes

[0029] Positioner mounting base, used for mounting on the positioner;

[0030] The first support device is located on the upper part of the displacement mounting base and includes two first support beams arranged in parallel and a first width adjustment mechanism connecting the two first support beams. The first width adjustment mechanism is used to adjust the width between the two first support beams so that the two first support beams are respectively attached to the upper parts of the first side plate and the second side plate in the first pre-assembled box structure.

[0031] The second support device is located at the lower part of the displacement mounting base and includes two parallel second support beams and a second width adjustment mechanism connecting the two second support beams. The second width adjustment mechanism is used to adjust the width between the two second support beams so that the two second support beams are respectively attached to the lower part of the first side plate and the second side plate in the first pre-assembled box structure.

[0032] In this embodiment of the invention, at least one of the first width adjustment mechanism and the second width adjustment mechanism includes a width adjustment seat, a width driving component, and a scissor assembly. The two first support beams or the two second support beams are connected by the scissor assembly. The width adjustment seat is disposed on the displacement mounting seat, and the width driving component is disposed on the width adjustment seat and connected to the scissor assembly to drive the scissor assembly to move the two first support beams or the two second support beams closer to each other or further away from each other.

[0033] In this embodiment of the invention, the scissor lift assembly includes a first link, a second link, and a first scissor lift telescopic arm. Two end hinge points of the first scissor lift telescopic arm are slidably disposed on the first link, and the other two end hinge points are slidably disposed on the second link. The first link and the second link are respectively disposed on two first support beams or two second support beams in a one-to-one correspondence. The first support beam or the second support beam with the first link is fixedly disposed on the width adjustment seat. The width driving assembly is driven to one end of the first scissor lift telescopic arm disposed on the first link, and drives the first scissor lift telescopic arm to move the first support beam or the second support beam with the second link by performing telescopic movement.

[0034] In this embodiment of the invention, the welding fixture for box-shaped structures further includes a height adjustment device, which is disposed on the displacement mounting base and is used to adjust the distance between the first support device and the second support device in the height direction.

[0035] In this embodiment of the invention, the height adjustment device includes a slide rail and a height adjustment mechanism. The slide rail extends along the height direction of the displacement mounting base and is disposed on the upper part of the displacement mounting base. The first width adjustment mechanism is movably disposed on the slide rail. The height adjustment mechanism is disposed on the displacement mounting base and is drivenly connected to the first width adjustment mechanism to drive the first width adjustment mechanism to move on the slide rail.

[0036] Through the above technical solution, the welding method for controlling welding deformation of box-shaped structures provided by the embodiments of the present invention has the following beneficial effects:

[0037] When the box-type structure uses the above-described welding method, before performing full welding at the joints between the bottom plate and the first side plate, and between the bottom plate and the second side plate from the inside, the first and second side plates can be fixedly clamped with their lower ends resting on the bottom plate. Furthermore, before performing full welding at the joints between the bottom plate and the first side plate, the bottom plate and the second side plate, the cover plate and the first side plate, and the cover plate and the second side plate from the outside, the first and second side plates can be fitted and supported within the inner cavity of the first pre-assembled box-type structure. This ensures that the welding of the bottom plate, the first side plate, and the second side plate... Before welding the two inner welds, the first and second side plates can be fixedly clamped and placed on the base plate to ensure the stability of the two side plates on the base plate. Before welding the four outer welds between the base plate, cover plate, first side plate and second side plate, the inner sides of the first and second side plates can be fitted and supported to control the deformation caused by subsequent welding. Thus, the welding of the box structure can be completed without setting up a process plate. Compared with the method of using a process plate to control welding deformation, the fitted and supported clamping method in this invention can obviously control the deformation of a larger area, while eliminating the process of removing the process plate.

[0038] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0039] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0040] Figure 1 This is a flowchart of a welding method for controlling welding deformation of a box-shaped structure according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the assembly tooling according to an embodiment of the present invention;

[0042] Figure 3 This is a partial structural schematic diagram of the assembly tooling according to an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of the structure of the centering drive component according to an embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram of the structure of a fetal membrane tool according to an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the structure of the first support device according to an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of the structure of the first width adjustment mechanism from one perspective according to an embodiment of the present invention;

[0047] Figure 8 This is a structural schematic diagram of the first width adjustment mechanism from another perspective according to an embodiment of the present invention.

[0048] Explanation of reference numerals in the attached figures

[0049] 100 Displacement mounting base 101 Lateral mounting section

[0050] 200 First support device 201 First support beam

[0051] 202 First width adjustment mechanism 300 Second support device

[0052] 301 Second support beam; 401 Width adjustment seat

[0053] 402 Width-driven component; 403 Scissor lift component

[0054] 404 First Link 405 Second Link

[0055] 406 First scissor lift telescopic arm; 407 First lever mainboard

[0056] 408 Second rod mainboard 409 Connecting support plate

[0057] 410 First sliding groove 411 Second sliding groove

[0058] 412 Hinged sliding shaft; 413 Second scissor arm

[0059] 414 First rotary drive component; 415 Width adjusting screw

[0060] 416 Pull rod 500 Height adjustment device

[0061] 501 Slide rail; 502 Height adjustment mechanism

[0062] 503 Second rotary drive component; 504 Height adjustment screw

[0063] 600 sets of platforms, 700 sets of clamping mechanisms

[0064] 701 Centering drive assembly; 702 Centering drive housing

[0065] 703 First magnetic chuck 704 First pressing assembly

[0066] 705 Third pressing component; 706 Gear drive component

[0067] 707 Gear, 708 Rack

[0068] 801 Base plate 802 First side plate

[0069] 803 Second side plate Detailed Implementation

[0070] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0071] The welding method and welding system for controlling welding deformation of box-type structures according to the present invention are described below with reference to the accompanying drawings.

[0072] like Figure 1 and Figure 2 As shown, the present invention provides a welding method for controlling welding deformation of box-shaped structures, wherein the welding method includes:

[0073] Step 100: Fix the first side plate 802 and the second side plate 803 at a relative interval, with their lower ends placed on the base plate 801.

[0074] Specifically, the box-shaped base plate 801 can be fixed flat, and then the first side plate 802 and the second side plate 803 are fixedly clamped at intervals by tooling fixtures, so that the lower ends of the first side plate 802 and the second side plate 803 are placed on the base plate 801 according to the preset welding position, so as to ensure the stability of the first side plate 802 and the second side plate 803 on the base plate 801 during the subsequent welding process.

[0075] Step 200: Perform full welding on the joint between the base plate 801 and the first side plate 802, and the joint between the base plate 801 and the second side plate 803 from the inside.

[0076] More specifically, after the first side plate 802 and the second side plate 803 are stably placed on the base plate 801, the two inner welds between the base plate 801, the first side plate 802 and the second side plate 803 can be welded to achieve the initial welding of the base plate 801 with the first side plate 802 and the second side plate 803 respectively.

[0077] Step 300: Fix the cover plate to the upper end of the first side plate 802 and the second side plate 803.

[0078] Furthermore, after completing the welding of the two inner welds between the base plate 801, the first side plate 802, and the second side plate 803, the cover plate is fixedly clamped on the upper end of the first side plate 802 and the second side plate 803, thereby ensuring the stability of the relative position between the cover plate and the two side plates during subsequent welding.

[0079] Step 400: Spot weld the joint between the cover plate and the first side plate 802 and the joint between the cover plate and the second side plate 803 to form the first pre-assembled box structure.

[0080] Specifically, by spot welding the joint between the cover plate and the first side plate 802 and the joint between the cover plate and the second side plate 803, the cover plate can be connected to the first side plate 802 and the second side plate 803 respectively, thus initially forming a pre-assembled box structure.

[0081] Step 500: The first side plate 802 and the second side plate 803 are fitted, supported and clamped together in the inner cavity of the first pre-assembled box structure.

[0082] Step 600: Full welding is performed on the joints between the base plate 801 and the first side plate 802, the base plate 801 and the second side plate 803, the cover plate and the first side plate 802, and the cover plate and the second side plate 803 from the outside to form a second pre-assembled box structure.

[0083] Furthermore, by attaching and supporting the first side plate 802 and the second side plate 803 within the inner cavity of the first pre-assembled box structure, deformation can be controlled during the welding of the four external welds between the bottom plate 801, the cover plate, the first side plate 802, and the second side plate 803. The attachment and support can be provided along the entire length of the first side plate 802 and the second side plate 803, thus controlling deformation within the entire length area. After welding is completed, the attachment and support clamps of the first side plate 802 and the second side plate 803 can be removed directly.

[0084] Step 700: Full welding is performed on the joint between the cover plate and the first side plate 802 and the joint between the cover plate and the second side plate 803 from the inside of the second pre-assembled box structure to form the finished box structure.

[0085] When the box-type structure uses the above-described welding method, before performing full welding at the joints of the base plate 801 and the first side plate 802 from the inside, and at the joints of the base plate 801 and the second side plate 803, the first side plate 802 and the second side plate 803 can be fixedly clamped with their lower ends placed on the base plate 801 at intervals. Furthermore, before performing full welding at the joints of the base plate 801 and the first side plate 802, the base plate 801 and the second side plate 803, the cover plate and the first side plate 802, and the cover plate and the second side plate 803 from the outside, the first side plate 802 and the second side plate 803 can be fitted and supported within the inner cavity of the first pre-assembled box-type structure. This ensures that before performing full welding at the joints of the base plate 801 and the first side plate 802, the first side plate 802 and the second side plate 803, the first side plate 802 and the second side plate 803, the first side plate 802 and the second side plate 803 can be properly welded. Before welding the two inner welds between plate 802 and the second side plate 803, the first side plate 802 and the second side plate 803 can be fixedly clamped and placed on the base plate 801 to ensure the stability of the two side plates on the base plate 801. Before welding the four outer welds between the base plate 801, the cover plate, the first side plate 802 and the second side plate 803, the inner sides of the first side plate 802 and the second side plate 803 can be fitted and supported to control the deformation caused by subsequent welding. Thus, the welding of the box structure can be completed without setting up a process plate. Compared with the method of using a process plate to control welding deformation, the fitted and supported clamping method in this invention can obviously control the deformation of a larger area, while eliminating the process of removing the process plate.

[0086] See Figure 2 and Figure 3 In this embodiment of the invention, step 100, fixing the first side plate 802 and the second side plate 803 at a relative interval with their lower ends both placed on the base plate 801, includes:

[0087] Place the base plate 801 on the assembly platform 600 of the assembly tooling;

[0088] The control group uses the centering and clamping mechanism 700 to center and clamp the base plate 801 from both the left and right ends;

[0089] The first side plate 802 and the second side plate 803 are placed on the first magnetic suction member 703 and the second magnetic suction member of the centering clamping mechanism 700 in a one-to-one correspondence, so that the lower ends of the first side plate 802 and the second side plate 803 are respectively attached to the side of the base plate 801 away from the assembly platform 600. The first magnetic suction member 703 and the second magnetic suction member are respectively located at the left and right ends of the centering clamping mechanism 700.

[0090] Specifically, assembly fixtures can be used to assemble the base plate 801, the first side plate 802, and the second side plate 803. The centering clamping mechanism 700 of the assembly fixture can center and clamp the base plate 801, thereby ensuring the accuracy of the placement of the base plate 801 during the assembly process. In addition, by setting a first magnetic suction member 703 and a second magnetic suction member on the centering clamping mechanism 700, after the base plate 801 is in place, the lower ends of the first side plate 802 and the second side plate 803, which are placed one-to-one on the first magnetic suction member 703 and the second magnetic suction member, can be fitted and overlapped with the base plate 801. The setting of the two magnetic suction members can facilitate the relatively spaced and fixed clamping of the first side plate 802 and the second side plate 803 on the centering clamping mechanism 700.

[0091] In this embodiment of the invention, after the control group aligns and clamps the tooling with the tooling from both the left and right ends of the base plate 801, it further includes:

[0092] The first pressing component 704 and the second pressing component of the centering clamping mechanism 700 respectively press the left and right ends of the base plate 801 onto the assembly platform 600 in a corresponding manner. The first pressing component 704 and the second pressing component are respectively located at the left and right ends of the centering clamping mechanism 700.

[0093] Specifically, in addition to centering and clamping the base plate 801, the centering and clamping mechanism 700 can also press the left and right ends of the base plate 801 onto the assembly platform 600 by adding a first pressing component 704 and a second pressing component. This allows for fixed clamping of the base plate 801 from another direction, further improving the stability of the clamping of the base plate 801. Furthermore, in order to achieve the downward pressing of the base plate 801 by the first pressing component 704 and the second pressing component, the first pressing component 704 and the second pressing component should be set close to the base plate 801 and press the base plate 801 from above.

[0094] In this embodiment of the invention, step 300, fixing the cover plate to the upper end of the first side plate 802 and the second side plate 803, includes:

[0095] Place the cover plate on the upper end of the first side plate 802 and the second side plate 803;

[0096] The third pressing component 705 and the fourth pressing component of the centering clamping mechanism 700 respectively press the left and right ends of the cover plate onto the first side plate 802 and the second side plate 803. The third pressing component 705 and the fourth pressing component are respectively located at the left and right ends of the centering clamping mechanism 700.

[0097] Specifically, the assembly fixture can be used to complete the assembly of the cover plate with the first side plate 802 and the second side plate 803 respectively. A third pressing component 705 and a fourth pressing component are added to the centering clamping mechanism 700. After the cover plate is placed on the upper end of the first side plate 802 and the second side plate 803, the third pressing component 705 and the fourth pressing component are controlled to press the left and right ends of the cover plate against the first side plate 802 and the second side plate 803 in a one-to-one correspondence, ensuring the stability of the cover plate assembly. Furthermore, to achieve the pressing of the cover plate by the third pressing component 705 and the fourth pressing component, the third pressing component 705 and the fourth pressing component should be positioned close to the cover plate and press it from above.

[0098] In this embodiment of the invention, step 500, which involves fitting and supporting the first side plate 802 and the second side plate 803 within the inner cavity of the first pre-assembled box-shaped structure, includes:

[0099] The first pre-assembled box-type structure is fixedly mounted on the membrane tooling;

[0100] The width adjustment mechanism of the control membrane tooling adjusts the width of the two support beams so that the two support beams are respectively fitted to the inner walls of the first side plate 802 and the second side plate 803.

[0101] Furthermore, a membrane fixture can be used to insert into the inner cavity of the first pre-assembled box-shaped structure to support and clamp the first side plate 802 and the second side plate 803. The membrane fixture has a width adjustment mechanism and two support beams connected to the width adjustment mechanism. The two support beams can be respectively fitted against the inner walls of the first side plate 802 and the second side plate 803 to achieve support and clamping, thereby controlling deformation during the welding process. The width adjustment mechanism can adjust the width of the two support beams, making the membrane fixture applicable to box-shaped structures of different sizes and specifications. In addition, the two support beams can be fitted against the first side plate 802 and the second side plate 803 along their entire length, thereby controlling deformation along the entire length of the first side plate 802 and the second side plate 803. Of course, the invention is not limited to this; other tooling fixtures can also be used to support and clamp the two side plates respectively.

[0102] To achieve the above objectives, the present invention also provides a welding system, wherein the welding system is applied to the welding method for controlling the welding deformation of a box-shaped structure as described above, and includes an assembly fixture and a mold fixture. The assembly fixture is used to fix and clamp the first side plate 802 and the second side plate 803 at a relative interval, with their lower ends both placed on the base plate 801, and to fix and clamp the cover plate on the upper ends of the first side plate 802 and the second side plate 803. The mold fixture is used to fit and support the first side plate 802 and the second side plate 803 from the inner cavity of the first pre-assembled box-shaped structure. Even before welding the two inner welds between the base plate 801, the first side plate 802, and the second side plate 803, the first side plate 802 and the second side plate 803 can be fixedly clamped and placed on the base plate 801 to ensure the stability of the two side plates on the base plate 801. And before welding the four outer welds between the base plate 801, the cover plate, the first side plate 802, and the second side plate 803, the inner sides of the first side plate 802 and the second side plate 803 can be fitted and supported to control the deformation caused by subsequent welding. Thus, the welding of the box structure can be completed without setting up a process plate. Moreover, compared with the method of using a process plate to control welding deformation, the fitted and supported clamping method in this invention can obviously control the deformation of a larger area, while eliminating the process of removing the process plate.

[0103] Please see again Figure 2 and Figure 3In this embodiment of the invention, the assembly tooling includes an assembly platform 600 and a centering clamping mechanism 700. The centering clamping mechanism 700 includes a centering drive assembly 701, a first magnetic suction member 703, a second magnetic suction member, a third pressing assembly 705, a fourth pressing assembly, and two centering drive seats 702. The two centering drive seats 702 are respectively disposed on the left and right sides of the assembly platform 600. The centering drive assembly 701 is drivenly connected to the two centering drive seats 702 respectively and is used to drive the two centering drive seats 702 to move closer to each other to center and clamp the base plate 801 from the left and right ends. Thus, one centering drive assembly 701 can realize the adjustment of the position of the two centering drive seats 702, achieving the purpose of saving manufacturing costs and facilitating layout design. At the same time, the setting of the centering clamping mechanism 700 can also make the assembly tooling applicable to box-type structures of different sizes and specifications. The first magnetic suction member 703 and the second magnetic suction member are respectively disposed on the two centering drive seats 702, and are used to magnetically clamp and fix the first side plate 802 and the second side plate 803 respectively. That is, by setting the first magnetic suction member 703 and the second magnetic suction member on the centering clamping mechanism 700, the lower ends of the first side plate 802 and the second side plate 803, which are respectively placed on the first magnetic suction member 703 and the second magnetic suction member, can be fitted and overlapped with the base plate 801 after the base plate 801 is in place. The setting of the two magnetic suction members can facilitate the relative spacing and fixed clamping of the first side plate 802 and the second side plate 803 on the centering clamping mechanism 700. The third pressing component 705 and the fourth pressing component are respectively disposed on the two centering drive seats 702, and are used to press the left and right ends of the cover plate onto the first side plate 802 and the second side plate 803 respectively. After the bottom plate 801 is assembled with the two side plates, the cover plate can be placed on the upper end of the first side plate 802 and the second side plate 803. By controlling the third pressing component 705 and the fourth pressing component to press the left and right ends of the cover plate onto the first side plate 802 and the second side plate 803 respectively, the stability of the assembly of the cover plate with the two side plates is ensured.

[0104] like Figure 4As shown, specifically, the centering drive assembly 701 includes a gear drive 706, a gear 707, and two racks 708. The two racks 708 are correspondingly mounted on two centering drive seats 702 and extend along the moving direction of the centering drive seats 702. The gear 707 is rotatably mounted on the assembly platform 600 and meshes with the two racks 708 on opposite sides. The gear drive 706 is mounted on the assembly platform 600 and drives the gear 707 to rotate. When the gear drive 706 drives the gear 707 to rotate forward, it causes the two centering drive seats 702 corresponding to the two racks 708 to move closer together; when the gear drive 706 drives the gear 707 to rotate in the opposite direction, it causes the two centering drive seats 702 corresponding to the two racks 708 to move away from each other. Furthermore, each of the two centering drive seats 702 is provided with a fixing and positioning block for clamping the base plate 801.

[0105] Please see again Figure 3 Furthermore, the number of the first magnetic accumulator 703 and the second magnetic accumulator is not limited to one; multiple magnetic accumulators can be evenly spaced on each centering drive seat 702. The magnetic accumulators can be electromagnets. Since the side plate is located below the cover plate during the assembly process, the magnetic accumulators on the centering drive seat 702 are located below the third pressing assembly 705 or the fourth pressing assembly. Furthermore, the number of third pressing components 705 or fourth pressing components on a centering drive seat 702 can be two. One centering drive seat 702 is provided with two third pressing components 705 spaced apart along the width direction, and the other centering drive seat 702 is provided with two fourth pressing components spaced apart along the width direction. Furthermore, both the third pressing components 705 and the fourth pressing components include an upper swing drive member and a cover plate pressing block that can be swung up and down on the centering drive seat 702. The upper swing drive member is provided on the centering drive seat 702 and is drivenly connected to the cover plate pressing block to drive the free end of the cover plate pressing block to swing down until the cover plate is pressed tightly onto the first side plate 802 or the second side plate 803.

[0106] like Figure 2 and Figure 3 As shown, in this embodiment of the invention, the centering clamping mechanism 700 further includes a first pressing component 704 and a second pressing component. The first pressing component 704 and the second pressing component are respectively disposed on two centering drive seats 702, and are used to press the left and right ends of the base plate 801 onto the assembly platform 600. That is, in addition to centering and clamping the base plate 801, the centering clamping mechanism 700 can also press the left and right ends of the base plate 801 onto the assembly platform 600 by adding the first pressing component 704 and the second pressing component, thereby achieving fixed clamping of the base plate 801 from another direction and further improving the stability of the clamping of the base plate 801.

[0107] Since the base plate 801 is located below the side plate during the assembly process, the first pressing component 704 and the second pressing component are positioned below the corresponding magnetic suction components on the centering drive seat 702. Furthermore, the number of first pressing components 704 or second pressing components on one centering drive seat 702 can be two. One centering drive seat 702 has two first pressing components 704 spaced apart along its width, and the other centering drive seat 702 has two second pressing components spaced apart along its width. Further, both the first pressing component 704 and the second pressing component include a swing-down drive member and a base plate pressing block that can swing up and down on the centering drive seat 702. The swing-down drive member is located on the centering drive seat 702 and is drivenly connected to the base plate pressing block to drive the free end of the base plate pressing block to swing downwards until the base plate 801 is pressed firmly onto the assembly platform 600.

[0108] like Figure 5 As shown, in this embodiment of the invention, the membrane fixture includes a displacement mounting base 100, a first support device 200, and a second support device 300. The displacement mounting base 100 is used to mount on a positioner, meaning the position of the membrane fixture can be rotated by controlling the positioner. The first support device 200 is located on the upper part of the displacement mounting base 100 and includes two parallel first support beams 201 and a first width adjustment mechanism 202 connecting the two first support beams 201. The first width adjustment mechanism 202 is used to adjust the width between the two first support beams 201 so that the two first support beams 201 can be aligned. A support beam 201 is attached to the upper part of the first side plate 802 and the second side plate 803 respectively in the first pre-assembled box structure. The second support device 300 is located at the lower part of the displacement mounting base 100 and includes two parallel second support beams 301 and a second width adjustment mechanism connecting the two second support beams 301. The second width adjustment mechanism is used to adjust the width between the two second support beams 301 so that the two second support beams 301 are attached to the lower part of the first side plate 802 and the second side plate 803 respectively in the first pre-assembled box structure. After the first pre-assembled box-shaped structure is removed from the assembly fixture after assembly, it can be further fitted onto the membrane fixture. Based on the width between the two side plates of the box-shaped structure, the first width adjustment mechanism 202 and the second width adjustment mechanism can be controlled to increase the width between the two first support beams 201 and the two second support beams 301 respectively, so that the two first support beams 201 and the two second support beams 301 can stably fit and support the upper and lower parts of the two side plates respectively. That is, the membrane fixture in this invention can match and support box-shaped structures with different cross-sectional dimensions, thereby improving versatility.

[0109] Specifically, a positioner is a specialized welding auxiliary device suitable for welding displacement during rotary operations to achieve ideal processing positions and welding speeds. The box-type welding diaphragm fixture is fixedly mounted on the rotary support of the positioner by a displacement mounting base, thereby enabling the rotational displacement of the entire diaphragm fixture.

[0110] See Figure 5 and Figure 6 In this embodiment of the invention, at least one of the first width adjustment mechanism 202 and the second width adjustment mechanism includes a width adjustment seat 401, a width driving component 402, and a scissor assembly 403. The two first support beams 201 or the two second support beams 301 are connected via the scissor assembly 403. The width adjustment seat 401 is mounted on the displacement mounting base 100, and the width driving component 402 is mounted on the width adjustment seat 401 and connected to the scissor assembly 403, driving the scissor assembly 403 to move the two first support beams 201 or the two second support beams 301 closer together or further apart. By configuring the width adjustment mechanisms of both the two first support beams 201 and the two second support beams 301 as scissor-type structures, the stability of the two first support beams 201 and the two second support beams 301 during the width adjustment process can be ensured, as the scissor-type structure has at least four end hinge points for connection. Of course, the present invention is not limited to this. The first width adjustment mechanism 202 and the second width adjustment mechanism can also be set as ball screw mechanisms. The screw nut of the ball screw mechanism is directly connected to the first support beam 201 in the first width adjustment mechanism 202 or the second support beam 301 in the second width adjustment mechanism. By controlling the screw screw in the ball screw mechanism to rotate, the movement of the first support beam 201 or the second support beam 301 can be realized.

[0111] like Figure 6 and Figure 7As shown, in this embodiment of the invention, the scissor lift assembly 403 includes a first connecting rod 404, a second connecting rod 405, and a first scissor lift telescopic arm 406. Two end hinge points of the first scissor lift telescopic arm 406 are slidably disposed on the first connecting rod 404, and the other two end hinge points are slidably disposed on the second connecting rod 405. The first connecting rod 404 and the second connecting rod 405 are respectively disposed on two first support beams 201 or two second support beams 301 in a one-to-one correspondence. The first support beam 201 or the second support beam 301 with the first connecting rod 404 is fixedly disposed on the width adjustment seat 401. The width driving assembly 402 is drivenly connected to one end of the first scissor lift telescopic arm 406 disposed on the first connecting rod 404, and drives the first scissor lift telescopic arm 406 to move the first support beam 201 or the second support beam 301 with the second connecting rod 405 by performing telescopic movement. The first support beam 201 or the second support beam 301, which is equipped with a first connecting rod 404, is fixedly installed, while the first support beam 201 or the second support beam 301, which is equipped with a second connecting rod 405, is movable. When the width drive assembly 402 retracts, one of the arms of the first scissor telescopic arm 406, being directly connected to the width drive assembly 402, will deflect towards the opening direction under the pulling force. Furthermore, due to the connection at the intermediate hinge point, the other arm will also deflect towards the opening direction. This increases the angle between the two arms of the first scissor telescopic arm 406, reducing its width. Consequently, the width between the two first support beams 201 or the two second support beams 301 decreases, thus reducing the pulling force. The support beam equipped with the second link 405 moves toward the support beam equipped with the first link 404. When the width drive assembly 402 extends, one of the arms of the first scissor telescopic arm 406, being directly connected to the width drive assembly 402, deflects toward the retracting direction under the thrust. In addition, due to the connection of the intermediate hinge point, the other arm also deflects toward the retracting direction. That is, the included angle between the two arms of the first scissor telescopic arm 406 becomes smaller and the width becomes larger, thereby increasing the width between the two first support beams 201 or the two second support beams 301, thus pushing the support beam equipped with the second link 405 toward the support beam equipped with the first link 404.

[0112] See Figure 7 and Figure 8In this embodiment of the invention, the first link 404 and the second link 405 each include a first main bar 407 and a second main bar 408 arranged at intervals between each other, and a connecting support plate 409 connecting the first main bar 407 and the second main bar 408. The first main bar 407 has two first sliding grooves 410 spaced apart along its length. The second main bar 408 has two second sliding grooves 411 corresponding to the two first sliding grooves 410. The four end hinge points of the first scissor telescopic arm 406 are each provided with a hinge sliding shaft 412, which passes through the corresponding first sliding grooves 410 and second sliding grooves 411. The first connecting rod 404 and the second connecting rod 405 are designed as a double-layer plate connecting rod structure, which can play a reinforcing role. Both connecting main plates have sliding grooves for the hinged sliding shaft 412 of the first scissor telescopic arm 406 to pass through, ensuring the installation stability of the first scissor telescopic arm 406 on the first connecting rod 404 and the second connecting rod 405. Specifically, both ends of the hinged sliding shaft 412 extend from the upper and lower sides of the first scissor telescopic arm 406 and pass through the first sliding groove 410 and the second sliding groove 411 respectively. That is, the first scissor telescopic arm 406 is positioned in the height direction between the first main plate 407 and the second main plate 408.

[0113] In this embodiment of the invention, the scissor lift assembly 403 further includes a second scissor lift telescopic arm 413. The second scissor lift telescopic arm 413 is disposed on the side of the first scissor lift telescopic arm 406 facing away from the width drive assembly 402. Two end hinge points of the second scissor lift telescopic arm 413, located near the first scissor lift telescopic arm 406, are rotatably disposed at the ends of the first link 404 and the second link 405, respectively. The other two end hinge points, located away from the first scissor lift telescopic arm 406, are rotatably disposed on the two first support beams 201 or the two second support beams 301, respectively. The addition of the second scissor lift telescopic arm 413 can further ensure the stability during the width adjustment process. Furthermore, since the other two end hinge points of the second scissor lift telescopic arm 413, located away from the first scissor lift telescopic arm 406, are directly connected to the two first support beams 201 or the two second support beams 301, the first link 404 and the second link 405 do not need to be located along the entire length of the support beams, thereby reducing manufacturing costs and weight.

[0114] In this embodiment of the invention, the width drive assembly 402 includes a first rotary drive member 414, a width adjusting screw 415, and a pull rod 416. One end of the pull rod 416 is drivenly connected to one end of the first scissor lift telescopic arm 406 located on the first connecting rod 404, and the other end is connected to the screw nut on the width adjusting screw 415. The first rotary drive member 414 is located on the width adjustment seat 401 and drives the screw of the width adjusting screw 415 to rotate. That is, by driving the first rotary drive member 414 to drive the screw of the width adjusting screw 415 to rotate, the pull rod 416 can retract or extend on the width adjusting screw 415. Specifically, the first rotary drive member 414 can be a hand crank, and the width adjusting screw 415 extends along the length direction of the first connecting rod 404, with the axis of the hand crank perpendicular to the width adjusting screw 415. Of course, the invention is not limited to this; the width drive assembly 402 can also be a hydraulic cylinder, pneumatic cylinder, or electric cylinder capable of telescopic movement.

[0115] Please see again Figure 5 and Figure 6 In this embodiment of the invention, the welding fixture for the box-shaped structure further includes a height adjustment device 500. The height adjustment device 500 is disposed on the displacement mounting base 100 and is used to adjust the distance between the first support device 200 and the second support device 300 in the height direction. That is, by adding the height adjustment device 500, it is also convenient to adapt to box-shaped structures with different internal cavity height dimensions.

[0116] In this embodiment of the invention, the height adjustment device 500 includes a slide rail 501 and a height adjustment mechanism 502. The slide rail 501 extends along the height direction of the displacement mounting base 100 and is disposed on the upper part of the displacement mounting base 100. The first width adjustment mechanism 202 is movably disposed on the slide rail 501. The height adjustment mechanism 502 is disposed on the displacement mounting base 100 and is drivenly connected to the first width adjustment mechanism 202 to drive the first width adjustment mechanism 202 to move on the slide rail 501. That is, the second support device 300 disposed at the lower part of the displacement mounting base 100 is fixedly disposed. The first support device 200 is disposed on the upper part of the displacement mounting base 100 through the width adjustment seat 401. Then, the height adjustment mechanism 502 can drive the first support device 200 to move up and down in the direction of approaching or moving away from the second support device 300, so as to realize the adjustment of the distance between the first support device 200 and the second support device 300 in the height direction.

[0117] In this embodiment of the invention, the upper end of the displacement mounting base 100 extends laterally and is provided with a transverse mounting portion 101, which is located above the first support device 200. The height adjustment mechanism 502 includes a second rotary drive member 503 and a height adjustment screw 504. The screw nut of the height adjustment screw 504 is connected to the width adjustment seat 401 of the first width adjustment mechanism 202. The second rotary drive member 503 is disposed on the transverse mounting portion 101 and drives the screw of the height adjustment screw 504 to rotate. That is, by driving the second rotary drive member 503 to drive the screw of the height adjustment screw 504 to rotate, the width adjustment seat 401 of the first width adjustment mechanism 202 can move up and down on the height adjustment screw 504. Specifically, the second rotary drive member 503 can be a hand crank. Of course, the invention is not limited to this, and the height adjustment mechanism 502 can also be a hydraulic cylinder, pneumatic cylinder, or electric cylinder capable of telescopic movement.

[0118] In this embodiment of the invention, the displacement mounting base 100 is provided with a third magnetic attractor for fixing the end of the box-shaped structure. That is, before the first support device 200 and the second support device 300 provide lateral support to the box-shaped structure, the end of the box-shaped structure can be positioned using the third magnetic attractor provided on the displacement mounting base 100. Specifically, the third magnetic attractor can be an electromagnet.

[0119] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0120] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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.

[0122] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A welding method for controlling welding distortion of a box-shaped structure, characterized by, The welding method includes: The first side plate (802) and the second side plate (803) are fixedly clamped at a relative interval and their lower ends are placed on the base plate (801); Full welding is performed on the joint between the base plate (801) and the first side plate (802) and the joint between the base plate (801) and the second side plate (803) from the inside. The cover plate is fixedly clamped on the upper end of the first side plate (802) and the second side plate (803); Spot welding is performed at the joint between the cover plate and the first side plate (802) and at the joint between the cover plate and the second side plate (803) to form the first pre-assembled box structure; The first side plate (802) and the second side plate (803) are fitted, supported and clamped together in the inner cavity of the first pre-assembled box structure. With the two side plates in a fully internal support state, the joints between the bottom plate (801) and the first side plate (802), the bottom plate (801) and the second side plate (803), the cover plate and the first side plate (802), and the cover plate and the second side plate (803) are fully welded from the outside to form a second pre-assembled box structure. Full welding is performed on the joint between the cover plate and the first side plate (802) and the joint between the cover plate and the second side plate (803) from the inside of the second pre-assembled box structure to form the finished box structure. The process of fitting and supporting the first side plate (802) and the second side plate (803) within the inner cavity of the first pre-assembled box structure includes: The first pre-assembled box-type structure is fixedly mounted on the membrane tooling; The width adjustment mechanism of the control membrane tooling adjusts the width of the two support beams so that the two support beams are respectively fitted to the inner walls of the first side plate (802) and the second side plate (803) along the whole length, thereby achieving full-length inner support for the two side plates.

2. The welding method for controlling welding distortion of a box-shaped structure according to claim 1, characterized by, The step of fixing the first side plate (802) and the second side plate (803) at a relative interval with their lower ends resting on the base plate (801) includes: Place the base plate (801) on the assembly platform (600) of the assembly tooling; The control group uses the centering and clamping mechanism (700) of the tooling to center and clamp the base plate (801) from both the left and right ends; The first side plate (802) and the second side plate (803) are placed on the first magnetic suction member (703) and the second magnetic suction member of the centering clamping mechanism (700) in a one-to-one correspondence, so that the lower ends of the first side plate (802) and the second side plate (803) are respectively attached to the side of the base plate (801) away from the assembly platform (600), wherein the first magnetic suction member (703) and the second magnetic suction member are respectively located at the left and right ends of the centering clamping mechanism (700).

3. The welding method for controlling welding distortion of a box-shaped structure according to claim 2, characterized by, After the control group uses the centering and clamping mechanism (700) to center and clamp the base plate (801) from both the left and right ends of the base plate (801), it also includes: The first pressing component (704) and the second pressing component of the centering clamping mechanism (700) press the left and right ends of the base plate (801) onto the assembly platform (600) respectively. The first pressing component (704) and the second pressing component are respectively located at the left and right ends of the centering clamping mechanism (700).

4. The welding method for controlling welding distortion of a box-shaped structure according to claim 1, characterized by, The step of fixing the cover plate to the upper end of the first side plate (802) and the second side plate (803) includes: Place the cover plate on the upper end of the first side plate (802) and the second side plate (803); The third pressing component (705) and the fourth pressing component of the centering clamping mechanism (700) press the left and right ends of the cover plate onto the first side plate (802) and the second side plate (803) respectively, wherein the third pressing component (705) and the fourth pressing component are respectively located at the left and right ends of the centering clamping mechanism (700).

5. A welding system characterized by, The welding system is applied to the welding method for controlling the welding deformation of a box-type structure according to any one of claims 1 to 4, and includes assembly fixtures and a mold fixture. The assembly fixture is used to fix and clamp the first side plate (802) and the second side plate (803) at a relative interval with their lower ends placed on the bottom plate (801), and to fix and clamp the cover plate on the upper ends of the first side plate (802) and the second side plate (803). The mold fixture is used to fit and support the first side plate (802) and the second side plate (803) from the inner cavity of the first pre-assembled box-type structure.

6. The welding system of claim 5, wherein, The assembly tooling includes an assembly platform (600) and a centering clamping mechanism (700). The centering clamping mechanism (700) includes a centering drive assembly (701), a first magnetic suction element (703), a second magnetic suction element, a third pressing assembly (705), a fourth pressing assembly, and two centering drive seats (702). The two centering drive seats (702) are respectively disposed on the left and right sides of the assembly platform (600). The centering drive assembly (701) is driven connected to the two centering drive seats (702) respectively and is used to drive the two centering drive seats (702) to move closer to each other to... The left and right ends of the base plate (801) are aligned and clamped together. The first magnetic suction member (703) and the second magnetic suction member are respectively disposed on the two centering drive seats (702) and are used to magnetically clamp and fix the first side plate (802) and the second side plate (803) respectively. The third pressing component (705) and the fourth pressing component are respectively disposed on the two centering drive seats (702) and are used to press the left and right ends of the cover plate respectively onto the first side plate (802) and the second side plate (803).

7. The welding system of claim 6, wherein, The centering clamping mechanism (700) further includes a first pressing component (704) and a second pressing component. The first pressing component (704) and the second pressing component are respectively disposed on the two centering drive seats (702) and are used to press the left and right ends of the base plate (801) onto the assembly platform (600) respectively.

8. The welding system of claim 5, wherein, The fetal membrane tooling includes A positioner mounting base (100) is used for mounting on a positioner; The first support device (200) is located on the upper part of the displacement mounting base (100) and includes two first support beams (201) arranged in parallel and a first width adjustment mechanism (202) connecting the two first support beams (201). The first width adjustment mechanism (202) is used to adjust the width between the two first support beams (201) so that the two first support beams (201) are respectively attached to the upper part of the first side plate (802) and the second side plate (803) in the first pre-assembled box structure. The second support device (300) is located at the lower part of the displacement mounting base (100) and includes two parallel second support beams (301) and a second width adjustment mechanism connecting the two second support beams (301). The second width adjustment mechanism is used to adjust the width between the two second support beams (301) so that the two second support beams (301) are respectively attached to the lower part of the first side plate (802) and the second side plate (803) in the first pre-assembled box structure.

9. The welding system according to claim 8, characterized in that, At least one of the first width adjustment mechanism (202) and the second width adjustment mechanism includes a width adjustment seat (401), a width drive assembly (402), and a scissor assembly (403). The two first support beams (201) or the two second support beams (301) are connected through the scissor assembly (403). The width adjustment seat (401) is disposed on the displacement mounting seat (100). The width drive assembly (402) is disposed on the width adjustment seat (401) and connected to the scissor assembly (403) to drive the scissor assembly (403) to move the two first support beams (201) or the two second support beams (301) closer to each other or further away from each other.

10. The welding system according to claim 9, characterized in that, The scissor lift assembly (403) includes a first link (404), a second link (405), and a first scissor lift telescopic arm (406). Two end hinge points of the first scissor lift telescopic arm (406) are slidably mounted on the first link (404), and the other two end hinge points are slidably mounted on the second link (405). The first link (404) and the second link (405) are respectively mounted on two first support beams (201) or two second support beams (301). The first support beam (201) or the second support beam (301) of the first connecting rod (404) is fixedly mounted on the width adjustment seat (401). The width drive assembly (402) is driven to one end of the first scissor telescopic arm (406) mounted on the first connecting rod (404), and drives the first scissor telescopic arm (406) to move the first support beam (201) or the second support beam (301) of the second connecting rod (405) by performing telescopic movement.

11. The welding system according to claim 8, characterized in that, The welding fixture for the box-shaped structure also includes a height adjustment device (500), which is mounted on the displacement mounting base (100) and is used to adjust the distance between the first support device (200) and the second support device (300) in the height direction.

12. The welding system according to claim 11, characterized in that, The height adjustment device (500) includes a slide rail (501) and a height adjustment mechanism (502). The slide rail (501) extends along the height direction of the displacement mounting base (100) and is disposed on the upper part of the displacement mounting base (100). The first width adjustment mechanism (202) is movably disposed on the slide rail (501). The height adjustment mechanism (502) is disposed on the displacement mounting base (100) and is drivenly connected to the first width adjustment mechanism (202) to drive the first width adjustment mechanism (202) to move on the slide rail (501).

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