Welding and clamping tooling and welding method for rail vehicle flat roof sealing cavity
A welding method and technology for rail vehicles, which are applied in the field of rail vehicles, can solve the problems of meeting the requirements of laser welding for the lap gap between the air-conditioning flat top plate and the sealing cavity, reduce welding deformation and welding difficulty, and meet the requirements of air tightness and strength. , The effect of beautiful welding seam
Active Publication Date: 2016-09-07
CRRC QINGDAO SIFANG CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to provide a welding method for the flat roof sealing chamber of rail vehicles, so as to overcome the problems that the existing technology cannot ensure that the lap gap between the flat roof plate of the air conditioner and the sealing chamber meets the requirements of laser welding in a narrow space.
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[0028] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.
[0029] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying Describes, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate in a specific orientation, and therefore should not be construed as ...
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Abstract
The invention relates to the technical field of railway vehicles, and particularly discloses a flat top sealing cavity welding and clamping tool and welding method for a railway vehicle. The method includes the steps that the clamping tool is adopted to clamp a flat top plate of an air conditioner and a sealing cavity, arcing is performed from the linear to-be-welded position of the flat top plate of the air conditioner and the sealing cavity, laser welding is started, when the welding direction changes, welding is performed in a round angle transition mode, after one circle of welding is completed, welding is continued along a welding track, the arcing position is covered, then, arc extinguishing is completed, and laser welding is completed. The flat top plate of the air conditioner and the sealing cavity are clamped through the clamping tool before being welded, it can be guaranteed that in a narrow space, the overlap-joint gap between the flat top plate of the air conditioner and the sealing cavity meets the laser welding requirement, through laser welding, not only can the air tightness and strength requirements be met but also welding deformation and welding difficulty are reduced, round angle transition and one-time arcing and arc extinguishing are adopted, the arcing position is covered with the arc extinguishing position, and the quality and the sealing performance of welding joints are effectively improved.
Description
technical field [0001] The invention relates to the technical field of rail vehicles, in particular to a welding clamping tool for a flat-roof sealing chamber of a rail vehicle and a welding method for a flat-roof sealing chamber of a rail vehicle. Background technique [0002] With the continuous improvement of the requirements for light weight and anti-corrosion of the car body, the stainless steel car body of rail vehicles is gradually being promoted and used. Most of the stainless steel car bodies are non-painted car bodies, and the requirements for the appearance quality and commercialization of the car body are relatively high. Due to the thermophysical and mechanical properties of the stainless steel material itself, the arc welding deformation is relatively large. Therefore, the resistance spot welding process is mainly used for the stainless steel body at present, supplemented by the arc welding process. Resistance spot welding can effectively reduce the welding def...
Claims
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IPC IPC(8): B23K37/04B23K26/70B23K26/28
CPCB23K26/24B23K26/26B23K37/04B23K2101/006
Inventor 肖雪峰马爱华韩晓辉何智勇
Owner CRRC QINGDAO SIFANG CO LTD