CN115488501A

CN115488501A - High-speed rail embedded channel adopting novel welding mode

Info

Publication number: CN115488501A
Application number: CN202110682296.XA
Authority: CN
Inventors: 徐公科; 梁东; 陈涛
Original assignee: Shandong Antaike Engineering Material Co ltd
Current assignee: Shandong Antaike Engineering Material Co ltd
Priority date: 2021-06-20
Filing date: 2021-06-20
Publication date: 2022-12-20

Abstract

The invention discloses a high-speed rail embedded channel adopting a novel welding mode. In the prior channel welding process, the C-shaped steel and the I-shaped steel are welded by using carbon dioxide protection welding, the welding seam is large, the four sides of the I-shaped steel are provided with welding seams, so that the C-shaped steel cannot be rolled and bent after welding, gaps are easy to form among the welding seams, and acid return is caused. According to the high-speed rail pre-buried channel adopting the novel welding mode, two thick welding seams and two thin welding seams are welded during welding, the thick welding seams are welded by carbon dioxide protection, and the thin welding seams are welded by laser, so that the welding strength can be ensured, the seams can be sealed, and the post-welding roll bending is facilitated. After two laser fine welding steps are used, the roll bending is very convenient, acid is not easy to return, and a large amount of cost is saved.

Description

High-speed rail embedded channel adopting novel welding mode

Technical Field

The invention relates to the technical field of pre-buried channels, in particular to the welding aspect of a channel.

Background

The high-speed rail embedded channel is an ideal fixing piece which is convenient to mount and adjustable, and the channel embedded piece can be used for fixing any structural component by using a T-shaped bolt or a toothed bolt and a matched nut and washer. The channel is pre-buried in the concrete, and the surface is level with the concrete.

However, the existing high-speed rail pre-buried channel is formed by welding a C-shaped steel and an I-shaped steel anchor rod, galvanizing is performed after welding, carbon dioxide gas shielded welding is used for welding, if four sides are welded, the weld joint on two sides is required to be thin, roll bending is facilitated, but the carbon dioxide shielded welding cannot generate a thin weld joint; if two surfaces are welded, the two surfaces which are not welded have seams, and acid liquor is easy to enter the seams in the acid washing process of galvanizing, so that acid return is caused, which is also not allowable. Therefore, a high-speed rail embedded channel adopting a novel welding mode is designed to solve the problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a high-speed rail embedded channel adopting a novel welding mode.

In order to realize the purposes of ensuring the mechanical and fatigue requirements, not returning acid and being beneficial to roll bending, the invention adopts the following technical scheme:

a high-speed rail pre-buried channel adopting a novel welding mode comprises C-shaped steel, I-shaped steel, large welding seams and small welding seams. The C-shaped steel is tightly attached to the surface of the I-shaped steel, the large welding line is used for welding the long edge of the I-shaped steel and the C-shaped steel, and the height of a welding leg is 8 x 5; the small welding line is formed by welding the short edge of the I-shaped steel and the C-shaped steel, the height of a welding leg is 2 x 2, the large welding line is welded firstly during welding, the small welding line is welded after the large welding line is welded, and the small welding line is in seamless connection with the large welding line.

Preferably, the large weld fillets 8 x 5 are to guarantee tensile and fatigue requirements for the weld. And the strength requirement of welding is ensured.

Preferably, the small weld fillet 2 x 2 is used for ensuring the sealing of the side seams of the I-shaped steel and the C-shaped steel and can leave enough distance for the roll bending wheel to roll through.

Preferably, welding the large welding seam and then welding the small welding seam can ensure that the two welding seams can be better fused, and the phenomenon that acid is returned to the seam during acid cleaning to cause surface yellowing or blackening can be avoided.

Preferably, the large welding seam adopts carbon dioxide shielded welding, and the strength of the large welding seam meets the requirement; the small welding seams are laser welding, and the welding seams are uniform. Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the laser welding is carried out to form small welding seams, so that the roll bending is facilitated, the I-shaped steel can be welded firstly and then the roll bending is carried out, and a large amount of manpower and material resources are saved.

2. The laser welding is performed to form small welding seams, sealing is facilitated, poor sealing is often caused when large welding seams are used for carbon dioxide welding originally, and laser welding is rarely caused.

3. The welding cost of the small welding line is cheaper than that of the large welding line of carbon dioxide by adopting laser welding, so that a large amount of cost is saved.

Drawings

FIG. 1 is a schematic side structure diagram of a high-speed rail pre-buried channel adopting a novel welding mode according to the present invention;

FIG. 2 is a schematic front structural view of a high-speed rail pre-buried channel adopting a novel welding mode according to the present invention;

in the figure: the novel C-shaped steel, the novel I-shaped steel, the novel large welding seam and the novel small welding seam

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1, a high-speed railway buried channel who adopts new-type welding mode, including C shaped steel and I-steel two, big welding seam three, little welding seam four, the cross-section of shaped steel is C shape, the opening surface of channel is down, when placing the channel, puts channel opening surface down earlier the I-steel is put the shaped steel back, the one side and the channel-section steel of I-steel this moment are hugged closely, begin to weld big seam with carbon dioxide. During welding, a molten pool is formed during arc starting and arc ending, so that the arc starting and the arc ending can form a fusion state, and no gap exists.

Referring to fig. 2, after the large seam of the channel is welded, the small seam starts to be welded, the starting point of the small seam of the laser welding is at the middle point of the large seam, so that the large seam of the small seam can be well fused, no seam occurs, acid return is formed, and the arc closing point of the small seam is also at the middle point of the large seam, so that the large seam of the small seam is connected without acid return.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.

Claims

1. A high-speed rail pre-buried channel adopting a novel welding mode comprises C-shaped steel (1), I-shaped steel (2), a large welding seam (3) and a small welding seam (4), and is characterized in that the channel is welded by two large welding seams and two small welding seams, the large welding seam (3) is welded first and then the small welding seam (4) is welded, the large welding seam adopts carbon dioxide shielded welding, and welding feet are 5 x 8 high; the small seam adopts laser protection welding, and the welding seam is 2 x 2 high.

2. The high-speed rail embedded channel adopting the novel welding mode as claimed in claim 1, wherein the welding leg of the large welding seam (3) is 5 x 8 high; the leg of the small welding seam (4) is 2 x 2 high.

3. The high-speed rail embedded channel adopting the novel welding mode is characterized in that the large seam (3) is welded firstly, and then the small seam (4) is welded.

4. The high-speed rail embedded channel adopting the novel welding mode as claimed in claim 1, characterized in that the large welding seam (3) adopts carbon dioxide arc welding; the small welding seam (4) adopts laser welding.