A New Type of Process Metal Pipeline Welding Method

A welding method and metal pipe technology, which are applied in metal processing, welding equipment, metal processing equipment, etc., can solve the problems of high cost, difficult to guarantee welding quality, slow welding speed, etc., to reduce construction costs, shorten the welding period, reduce The effect of labor

Active Publication Date: 2019-08-06
中电环宇(北京)建设工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a new welding method for process metal pipelines. The invention combines the two welding methods of argon arc priming and carbon dioxide shielded welding to the welding work of process metal pipelines, which solves the problem of slow welding speed, high cost, and welding problems. The problem that the quality is not easy to guarantee has greatly improved the welding efficiency of process metal pipes. See the description below for details:

Method used

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  • A New Type of Process Metal Pipeline Welding Method

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Embodiment 1

[0026] A new welding method for process metal pipes, see figure 1 , the welding method includes the following steps:

[0027] 101: The arc starting point is set at 1~2mm from the bottom, and continuous arc welding is adopted;

[0028] Among them, if the gap at the arc starting point is too small, the formed weld on the back will leak out, and the fusion weld cannot be formed, and there is an obvious dent boundary at the junction of the two formed welds, and there is no transitional fusion zone. When the gap is too large, it is easy to produce welding bumps, and even the welding penetration cannot be formed normally. Therefore, it is a very critical operation technique to grasp the position of the arc starting point.

[0029] 102: Use the crescent-shaped horizontal swing method to stop for a while at the grooves on both sides to weld the strip. When the assembly gap is greater than 4mm, you can use the crescent-shaped swing method to increase and return the arc, so that the ba...

Embodiment 2

[0045] Below in conjunction with specific construction, the scheme in embodiment 1 is verified for feasibility, see the following description for details:

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Abstract

The invention discloses a novel method for welding a process metal pipeline. The method comprises the following steps: setting an arcing point on a position being 1-2mm away from the bottom and adopting continuous burning arc welding; adopting a crescent lateral oscillation method for welding electrodes on the grooves at the two sides; if an assembling gap is more than 4mm, adopting crescent-increasing backward resetting radian oscillation method for forming a welding line on the rear surface; puncturing a small hole in a root part, wherein the diameter of the small hole is set within the scope of 0.5-1mm; while welding the boundary on the front side of an arc crater after striking the arc on the front position being 2-3mm away from the arc crater, downward pressing a welding gun for 1-2mm, thereby increasing the intensity of the welding line; while welding an annular sealing joint on the pipeline, using a grinding wheel for polishing the slope at the welded arc crater; while welding the slope, downward pressing the welding gun for 1-2mm; inward contracting an electric conductor and a nozzle of the welding gun to be 0.5-1mm; adopting a reverse polarity welding method; reasonably selecting the diameter of the welding stick. According to the novel method for welding the process metal pipeline, the problems of low welding speed, high cost and difficulty in guaranteeing the quality are solved and the welding efficiency of the process metal pipeline is increased.

Description

technical field [0001] The invention relates to the field of welding, in particular to a novel process metal pipeline welding method. Background technique [0002] Pipeline welding is an important process in the construction process of various metal pipelines, and it is also an important part of control in construction. With the rapid development of technology, the number and types of process pipelines are increasing. Quality requirements are getting higher and higher, and welding restricts the progress of the entire construction period. Therefore, the fast and efficient welding of metal pipes is particularly important. [0003] In general, the welding of important process metal piping systems adopts the following two welding process methods: [0004] 1. Using argon arc welding, the shape is good and the welding quality is high, but the cost of argon gas and welding wire is high, the technical level of the welder is high, and the welding speed is slow. [0005] 2. The wel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16
CPCB23K9/16B23K2101/06
Inventor 王新河王彩东
Owner 中电环宇(北京)建设工程有限公司
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