Welding Process of Aluminum Alloy Roof for Subway Cars

A welding process and aluminum alloy technology, which is applied in the field of aluminum alloys, can solve the problems of affecting assembly, affecting product qualification rate, and high comprehensive cost, and achieve the effects of reducing welding man-hours, optimizing welding process parameters, and improving product qualification rate

Active Publication Date: 2017-03-08
辽宁忠旺铝合金精深加工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The welding process of the large parts of the aluminum alloy subway roof has high requirements on the assembly of the workpiece and the welding process. A slight deviation may cause serious product deformation, affect subsequent assembly, poor weld quality, and affect the product qualification rate.
In addition, the conventional welding process of large parts of the aluminum alloy subway roof still has problems such as complicated procedures and high overall cost.

Method used

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  • Welding Process of Aluminum Alloy Roof for Subway Cars
  • Welding Process of Aluminum Alloy Roof for Subway Cars
  • Welding Process of Aluminum Alloy Roof for Subway Cars

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Embodiment 1

[0033] Such as Figure 1-5 As shown, the car body roof of the subway in this embodiment is welded by five roof panels A1, A2, A3, A4, and A5 and two roof side beams B1 and B2.

[0034] In this embodiment, the roof of the car body is welded in two stages. First, each roof panel is welded, and then the roof side beam and the roof panel assembly are welded, as follows:

[0035] (1) Roof plate welding:

[0036] 1), material selection: select the above-mentioned roof panel as required, and the roof panel is a hollow profile with a single length of 16-20m, a width of 0.3-0.6mm, and a wall thickness of 2-3mm;

[0037] 2) Formal assembly: set the selected five roof panels side by side on the formal welding tool;

[0038] 3) Form-fitting welding: double-machine and double-wire linkage welding is used to weld the roof panels of the formal-fitting assembly. First, welding seams 2 and 3 are welded at the same time, and then welds 1 and 4 are welded at the same time;

[0039] 4) Reverse...

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Abstract

The invention discloses a welding technology of an aluminum alloy ceiling used for a subway compartment. The ceiling is formed by welding five subway roof plates and two subway roof edge beams, and the subway roof plates are hollow profiles, wherein the length of each subway roof plate ranges from 16 m to 20 m, the width of each subway roof plate ranges from 0.3 mm to 0.6 mm, and the wall thickness of each subway roof plate ranges from 2 mm to 3 mm. In the welding process, all the subway roof plates are firstly welded, and then the subway roof edge beams and a subway roof plate assembly are welded; the subway roof plates are welded through double-wire double-machine linkage welding, firstly, forward installation welding is performed, and then reverse installation welding is performed; the subway roof edge beams and the subway roof plate assembly are welded through single-wire double-machine linkage welding, wherein forward installation welding and reverse installation welding are also performed in sequence. The material of welded components, the steps and the technology are improved, the using requirements for the quality and size of product weld joints are completely met, the qualified rate of the product is substantially increased, and meanwhile welding working hours are reduced.

Description

technical field [0001] The invention belongs to the field of aluminum alloys, and relates to an aluminum alloy component for a subway, in particular to a welding process for an aluminum alloy ceiling for a subway carriage. Background technique [0002] The welding process of the large parts of the aluminum alloy subway car roof has high requirements on the assembly of the workpiece and the welding process. A slight deviation may cause serious product deformation, affect subsequent assembly, poor weld quality, and affect the product qualification rate. In addition, the conventional welding process of large parts of the aluminum alloy subway roof still has problems such as complicated procedures and high overall costs. [0003] In order to improve the welding seam quality and overall size requirements of our subway car roof products, improve the product qualification rate, and reduce the manufacturing man-hours, a new subway car roof welding process is hereby redesigned. Con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/02
CPCB23K9/02
Inventor 马青梅韩文宇宋宁高雨
Owner 辽宁忠旺铝合金精深加工有限公司
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