Under-vehicle lightweight bottom cover plate and welding method thereof

A bottom cover and bottom plate technology, applied in welding equipment, welding/welding/cutting items, railway car bodies, etc., can solve problems such as increased fatigue load, rivet fatigue fracture, rivet loss, etc., to achieve high welding quality and prevent deformation , Improve the effect of safety and reliability

Inactive Publication Date: 2019-06-18
BOMBARDIER SIFANG QINGDAO TRANSPORTATION
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  • Abstract
  • Description
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Problems solved by technology

[0004] The bottom cover that constitutes the equipment compartment of the underframe is usually made of riveted aluminum plates and aluminum profiles. On-site maintenance found that some rivets were missing. The reason for the analysis was that the frequency of the first-order mode was low, which was closer to the excitation frequency of the vehicle part, and the fatigue load increased. , leading to fatigue fracture of individual rivets

Method used

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  • Under-vehicle lightweight bottom cover plate and welding method thereof
  • Under-vehicle lightweight bottom cover plate and welding method thereof
  • Under-vehicle lightweight bottom cover plate and welding method thereof

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Embodiment Construction

[0032] In order to clearly illustrate the technical characteristics of this solution, the following will describe this solution through specific implementation modes and in conjunction with the accompanying drawings.

[0033] like Figure 1-12 As shown, an underbody cover plate includes an underbody cover plate body, the underbody cover plate body includes an aluminum alloy base plate 3 and an aluminum cover plate frame, the aluminum cover plate frame is set as an aluminum profile frame, The aluminum profile frame is welded by the first aluminum profile 1 and the second aluminum profile 2, the aluminum alloy base plate 3 is provided with aluminum profile reinforcing ribs, the thickness of the aluminum profile frame and the aluminum alloy base plate 3 are both 3 mm, so The thickness of the reinforcing rib 4 of the aluminum profile is 2mm;

[0034] Based on the structure of the lightweight bottom cover under the vehicle, the present invention also provides a welding method for ...

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Abstract

The invention discloses an under-vehicle lightweight bottom cover plate and a welding method thereof. The welding method includes welding aluminum profiles into an aluminum profile frame, overlappingan aluminum alloy plate into the aluminum profile frame for resistance spot welding, overlapping aluminum profile reinforcing ribs to the aluminum alloy plate for resistance spot welding, and formingthe under-vehicle bottom cover plate of an integral frame structure. The welding method aims at controlling and reducing the material cost of the bottom cover plate, achieving the lightweight design and meeting the need for the structural strength of the bottom cover plate. By the welding method, the welding quality of the aluminum profiles and the aluminum alloy plate is improved, deformation after welding is reduced, and a good appearance effect is achieved.

Description

technical field [0001] The invention belongs to the field of rail vehicle mechanical design, and in particular relates to a lightweight bottom cover plate under a vehicle and a welding method thereof. Background technique [0002] With the development of high-speed trains in recent years, trains have shifted from the main pursuit of speed to the development of comprehensive performance such as energy saving, high efficiency, reliability and comfort. [0003] The bottom cover plate is located at the bottom of the equipment compartment under the train, and forms a closed equipment compartment with the skirt plate and two end partitions. The equipment installed under the train is enclosed in the compartment to protect the equipment, reduce running resistance, and improve the air quality of the train. The dynamic performance can better reduce the noise inside the car. The safety and reliability of the structure design of the bottom cover are very important to the safe operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61D17/04B23K11/11B23K11/34B23K31/02B23K101/00B23K103/10
Inventor 单宝珠李海虹王锐锋张勇军赵春道宋琦超
Owner BOMBARDIER SIFANG QINGDAO TRANSPORTATION
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