Composite welding method of ultrasound wave and non-melt pole electrical arc

Abstract

The invention discloses a welding method of compounding ultrasonic and nonconsumable electrode voltaic arc. Under the welding condition of protection of nonconsumable electrode gas, the ultrasonic is conducted into welding arc through the conductive electrode and the voltaic arc obviously contracts after ultrasound is carried on. The invention not only has the advantages of stable welding process and high welding and forming quality which normal TIG welding has, but also can improve weld penetration of single-pass welding and therefore the method can realize high quality welding under normal welding condition. The invention converts the high frequency electrical signals of ultrasound supply into mechanical vibration through an energy conversion device and the mechanical vibration is amplified by an amplitude transformer, and then is transmitted to an electrode studded in the amplitude transformer so as to generate supersonic vibration of corresponding frequency on the electrode. The input power of the ultrasound can be adjusted at will between 1W to 1000W and then welding is carried out by the method of normal gas metal arc welding. When voltaic arc is applied to processing pieces, the energy is concentrated, thereby effectively improving utilization ratio of voltaic arc during welding.

Description

technical field

[0001] The invention relates to a welding method, specifically a welding method combining ultrasonic waves and non-melting electrode gas shielded welding, belonging to the technical fields of non-melting electrode arc welding and arc smelting. technical background

[0002] Non-melting arc welding is a type of welding, often called "TIG" welding. Ordinary TIG welding is widely used in the welding production of titanium alloy, aluminum alloy, stainless steel and superalloy, etc., and high-quality welded joints can be obtained under the protection of inert gas. However, the main disadvantage of TIG welding is that the arc energy is not concentrated during welding, resulting in small weldable thickness of a single pass, low welding efficiency and growth of grains after welding. For weldments with larger thicknesses, beveling or multi-layer multi-pass welding is required before welding. Therefore, ordinary TIG welding is mostly used for backing welding of thin p...

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