An irregularly shaped arc-shaped equipment hatch for a rail vehicle

Abstract

This application relates to an irregularly shaped arc-shaped equipment compartment door for rail vehicles, designed to meet the design requirements of some special rail vehicles where the equipment compartment angle changes along the vehicle's length. The irregularly shaped arc-shaped equipment compartment door for rail vehicles includes: a first door panel and a second door panel arranged adjacent to each other on the left and right sides, the first door panel and the second door panel being fixed together by friction stir welding; each of the first door panel and the second door panel includes an upper profile and a lower profile fixed together by friction stir welding, the lower profile having an arc-shaped cross-section along the longitudinal direction; a hinged profile, which is fixed together by friction stir welding to the lower part of the lower profile of the first door panel and the lower part of the lower profile of the second door panel; and an end support, which is fixed together by welding to the left end of the first door panel and the right end of the second door panel.

Description

Technical Field

[0001] This application relates to the field of rail vehicles, specifically to an irregularly shaped arc-shaped equipment hatch for rail vehicles. Background Technology

[0002] In the structural system of rail vehicles, the undercarriage equipment compartment doors play a crucial role. These doors are generally made of aluminum profiles or aluminum sheets and manufactured using welding processes. The lower part of the door is fitted with hinged profiles, which cleverly connect with the pivot of the crossbeam under the equipment compartment to form a hinged connection structure. This design makes the opening and closing of the door extremely convenient.

[0003] As an indispensable structural component of the undercarriage equipment compartment, the equipment door is multifunctional and crucial. It not only supports small components such as ventilation grilles, movable doors, and water inlets, but also bears the heavy responsibility of ensuring the equipment compartment's airtightness and resisting aerodynamic loads. Therefore, it has extremely high strength requirements, which are even more critical in high-speed rail operations. Furthermore, as part of the rail vehicle's exterior appearance, the equipment door requires strict control over the gaps and step precision between the door and other components, conforming to the vehicle's outline standards, and its own surface quality requirements are also extremely stringent. It can be said that a perfect equipment door is a powerful testament to a company's pinnacle of design and manufacturing capabilities.

[0004] Normally, the shape of the equipment compartment door is designed according to the vehicle's outline, presenting a straight shape along the vehicle's length. However, in some special projects, there is a design requirement for the end equipment compartment to change its angle along the vehicle's length, which undoubtedly brings great challenges to the design of the equipment compartment door. Summary of the Invention

[0005] This application relates to an irregularly shaped arc-shaped equipment compartment door for rail vehicles, which is used to meet the design requirements of some special rail vehicles where the equipment compartment angle changes along the vehicle length.

[0006] The technical solution of this utility model is as follows:

[0007] This application provides an irregularly shaped arc-shaped equipment hatch for a rail vehicle, comprising:

[0008] The first door panel and the second door panel are arranged adjacent to each other on the left and right sides. The first door panel and the second door panel are fixed by friction stir welding. Both the first door panel and the second door panel include an upper profile and a lower profile fixed by friction stir welding. The lower profile has an arc-shaped cross section along the longitudinal direction.

[0009] The hinge profile is welded and fixed to the lower part of the lower profile of the first door panel and the lower part of the lower profile of the second door panel by friction stir welding;

[0010] The end supports are welded and fixed to the left end of the first door panel and the right end of the second door panel.

[0011] Preferably, the hinge profile is flush with the first door panel and the second door panel at both ends in the left and right directions, respectively.

[0012] Preferably, the connection portion of the hinge profile with the lower profile of the first door panel and the lower profile of the second door panel forms a plane.

[0013] Preferably, the upper profile, the lower profile, and the hinge profile are extruded aluminum profiles.

[0014] Preferably, the first end support is welded to the left end of the first door panel using Mig or Tig fusion welding, and the second end support is welded to the right end of the second door panel using Mig or Tig fusion welding.

[0015] The beneficial effects of this utility model are as follows:

[0016] By using friction stir welding to connect and fix the various components, the strength of the hatch is effectively guaranteed while perfectly meeting the appearance requirements, achieving very ideal application results and opening up a new path for the manufacturing of equipment hatches for rail vehicles. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the irregularly shaped arc-shaped equipment hatch in an embodiment of this application. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the irregularly shaped arc-shaped equipment hatch in an embodiment of this application. Figure 2 . Detailed Implementation

[0019] The present application will be further described below with reference to the embodiments and accompanying drawings. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0020] Reference Figure 1 and Figure 2 This application provides an irregularly shaped arc-shaped equipment hatch for a rail vehicle, comprising:

[0021] The first door panel and the second door panel are arranged adjacent to each other on the left and right. The first door panel and the second door panel are fixed by friction stir welding, and a second friction stir weld 102 is formed between them in the figure. The first door panel and the second door panel each include an upper profile 11 and a lower profile 12 fixed by friction stir welding. A first friction stir weld 101 is formed between the upper profile 11 and the lower profile 12 in the figure. The lower profile 12 has an arc-shaped cross section in the longitudinal direction.

[0022] The hinge profile 2 is welded and fixed to the lower part of the lower profile 12 of the first door panel and the lower part of the lower profile 12 of the second door panel by friction stir welding, forming the third friction stir weld 103 in the figure.

[0023] The end supports are welded and fixed to the left end of the first door panel and the right end of the second door panel using Mig or Tig fusion welding.

[0024] In this embodiment, the hinge profile 2 is flush with the first door panel and the second door panel at both ends in the left and right directions, respectively.

[0025] In this embodiment of the application, the connection portion of the hinge profile 2 with the lower profile 12 of the first door panel and the lower profile 12 of the second door panel forms a plane.

[0026] In this embodiment, the upper profile 11, the lower profile 12, and the hinge profile 2 are extruded aluminum profiles.

[0027] In this embodiment, the first end support 4 is welded to the left end of the first door panel using Mig or Tig fusion welding, and the second end support 5 is welded to the right end of the second door panel using Mig or Tig fusion welding.

[0028] By using friction stir welding to connect and fix the various components, the strength of the hatch is effectively guaranteed while perfectly meeting the appearance requirements, achieving very ideal application results and opening up a new path for the manufacturing of equipment hatches for rail vehicles.

[0029] Reference Figure 1 and 2 The equipment door processing and assembly process in this embodiment of the application adopts the following flow:

[0030] Step 1: Process the first and second door panels.

[0031] First, the upper profile 11 and the lower profile 22 are subjected to the first friction stir welding to obtain the first door panel and the second door panel.

[0032] Step 2: Machining into two door panels, left and right.

[0033] Special tooling is used to perform a second friction stir weld on the first and second door panels in the left and right directions to ensure the angle and shape requirements of the equipment door.

[0034] Step 3: Machining the straight edge of the lower part of the door panel.

[0035] The door panel assembly obtained from the second step of processing is then subjected to a third friction stir welding process with the hinge profile 2.

[0036] Step 4: Weld the first end support 4 and the second end support 5 onto the structure obtained in Step 3 using Mig or Tig fusion welding.

[0037] Step 5: Finally, perform overall machining to ensure the overall width dimensions and complete the final feature dimensions such as the end support sealing surface and lock hole.

[0038] Step 6: Install sealing strips, door locks, safety locks, safety ropes, longitudinal stops, and other accessories to complete the production of the entire equipment door.

[0039] The application of friction stir welding provides a strong guarantee for the successful forming of irregular structures for equipment doors, while excellently meeting the stringent requirements for product appearance. As an emerging welding method, friction stir welding is gradually being promoted and applied on a large scale in many industries due to its obvious advantages. The processing method in this application embodiment has the potential to be extended to ordinary vehicle undercarriage equipment doors and similar structures. The upper profile 11, lower profile 12, and hinge profile adopt a single-plate extruded aluminum profile structure with ribs, which is lighter and simpler in structure compared to hollow profiles. Compared with simple aluminum plate bending and welding processes, it has more advantages in ensuring contour shape and appearance quality, greatly improving the overall quality of the product.

[0040] The main contents of the present invention have been described in the foregoing specification through embodiments. However, various modifications and changes can be made without departing from the main contents of the present invention as set forth in the claims. The drawings in this specification are illustrative and not restrictive. Therefore, the scope of the present invention should be determined by the claims and their legally equivalent forms or entities, and not solely by the described embodiments.

Claims

1. A special-shaped arc device cabin door of a rail vehicle, characterized in that, include: The first door panel and the second door panel are arranged adjacent to each other on the left and right sides, and the first door panel and the second door panel are fixed by friction stir welding. Both the first door panel and the second door panel include an upper profile and a lower profile fixed by friction stir welding, wherein the lower profile has an arc-shaped cross-section along the longitudinal direction; The hinge profile is welded and fixed to the lower part of the lower profile of the first door panel and the lower part of the lower profile of the second door panel by friction stir welding; The end supports are welded and fixed to the left end of the first door panel and the right end of the second door panel.

2. The contoured arc equipment bay door of a rail vehicle of claim 1, wherein, The hinge profile is flush with the first door panel and the second door panel at both ends in the left and right directions, respectively.

3. The contoured arc equipment bay door of a rail vehicle of claim 1, wherein, The connection between the hinge profile and the lower profile of the first door panel and the lower profile of the second door panel forms a plane.

4. The contoured arc equipment bay door of the rail vehicle of claim 1, wherein, The upper profile, the lower profile, and the hinge profile are extruded aluminum profiles.

5. The contoured arc equipment bay door of a rail vehicle of claim 1, wherein, The first end support is welded to the left end of the first door panel using Mig or Tig fusion welding, and the second end support is welded to the right end of the second door panel using Mig or Tig fusion welding.

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