Air guiding non-consumable gas shielded arc welding method

A technology of gas shielded welding and non-melting electrodes, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of increasing welding workload, reducing production efficiency, and wide heat-affected zone, so as to increase penetration ability, Efficient and high-speed welding, the effect of increasing welding penetration

Active Publication Date: 2016-03-30
陈奕泽
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Problems solved by technology

At present, large groove, multi-layer and multi-pass MAG/MIG welding or submerged arc welding are mostly used for welding thick plates, but this not only increases the welding workload, but also increases the consumption of welding materials and welding costs, and reduces production. efficiency, and the large heat input, wid

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  • Air guiding non-consumable gas shielded arc welding method
  • Air guiding non-consumable gas shielded arc welding method
  • Air guiding non-consumable gas shielded arc welding method

Examples

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Embodiment 1

[0050] A gas-guided non-melting electrode gas-shielded welding method in this embodiment takes the PAW-GTAW mode and selects a DC power supply as an example, and the specific operations are as follows:

[0051] Step 1. Before welding, after grinding and cleaning the 8mm thick aluminum alloy plate of the workpiece to be welded, fix it on the welding fixture; according to figure 1 As shown, connect the gas circuit, water circuit and circuit. The plasma welding torch and the TIG welding torch are respectively located on both sides of the workpiece. The axes of the two welding torches are perpendicular to the workpiece and are connected to the same welding power supply at the same time; The air path established by the valve, the connecting joint, the hollow tubular electrode and the auxiliary air-guiding pipeline is correctly connected; when the valve is in the closed state, start the air pumping device, perform pumping and depressurization treatment on the pressure release device,...

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Abstract

The invention relates to an air guiding non-consumable gas shielded arc welding method, and belongs to the technical field of welding methods. The welding method comprises the following steps: a penetrating arc is established through a welding control system, the inner cavity of a hollow pipe-shaped electrode and the center of an electric arc below the hollow pipe-shaped electrode are enabled to be in the high-pressure or negative-pressure state through an air filling device and an air extracting device, the pressure gradient of the penetrating arc in the radial direction is increased, and the straightness of the electric arc is improved; and through the adjustment of the high-pressure value or the negative-pressure value of the center of the electric arc and the welding process parameters of the electric arc, the straightness and the energy density of the air guiding electric arc are adjusted so as to realize good control of heat input of parent metal. The welding method has the advantages that the penetrating arc is established on the basis of a traditional plasma arc and a TIG arc and with the assistance of the air guiding characteristic, the welding penetration can be increased remarkably, the welding quality of a medium plate is improved, and the high-efficiency and high-quality welding is realized.

Description

technical field [0001] The invention relates to a welding method for air-guided non-melting electrode gas shielded welding, which belongs to the technical field of welding methods. Background technique [0002] With the rapid development of science and technology, welding technology, as an irreplaceable important processing technology, has penetrated into various fields such as automobiles, machinery manufacturing, military, aerospace and civilian daily life, and is playing an increasingly important role. Although new welding technologies such as laser welding, friction stir welding, and electron beam welding have emerged with the increase in the number of connections between metals, arc welding is still considered to be a relatively economical connection method that can achieve reliable connections between metals. How to improve its welding productivity, how to improve its welding quality, and how to realize its welding production automation have received more and more atte...

Claims

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Application Information

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IPC IPC(8): B23K28/02
CPCB23K28/02
Inventor 陈树君张瑞英蒋凡白立来徐斌李晓旭
Owner 陈奕泽
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