Method for detecting stability of gas tungsten arc welding (GTAW) additive manufacturing process based on arc voltage feedback

An arc voltage and additive manufacturing technology, applied in the field of additive manufacturing, can solve the problems of difficult engineering application, small arc length, and easy interference of the detection process by arc light, etc., achieving strong stability, low interference, and fast calculation speed Effect

Inactive Publication Date: 2017-02-01
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

At present, there are few researches on the detection of arc length in GTAW additive manufacturing, and some researchers use optical means to measure arc length. Disaster

Method used

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  • Method for detecting stability of gas tungsten arc welding (GTAW) additive manufacturing process based on arc voltage feedback

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Embodiment Construction

[0028] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0029] A method for detecting the forming height stability of GTAW additive manufacturing based on arc voltage feedback, the process stability is reflected by the arc length, comprising the following steps:

[0030] (1) Adjust the position of the GTAW welding torch to the top of the substrate 1, determine the arc starting point of the GTAW welding torch 5 and make the GTAW welding torch perpendicular to the surface of the substrate;

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Abstract

The invention provides a method for detecting the stability of the gas tungsten arc welding (GTAW) additive manufacturing process based on arc voltage feedback. The method comprises the steps that the stability of the process is reflected through the arc length, the arc length is indirectly fed back though arc voltage, and the initial position of a GTAW gun on a substrate is adjusted; in the forming process of a first layer, a voltage sensor is matched with a data acquisition card to obtain a variation signal of the arc voltage along a forming path; the arc voltage is converted into the arc length according to a calibration relationship, a variation signal of the arc length along a forming path is obtained, and a second layer, a third layer until the n layer are formed, so that a variation signal of the n layer arc length along a forming path is obtained; and if the arc length is within a certain range, it is judged that the forming process is stable. According to the method for detecting the stability of the GTAW additive manufacturing process based on arc voltage feedback, the purpose of real-time detection of the stability of the GTAW additive manufacturing process is effectively achieved, and the detection process is easy to operate, high in stability, not prone to being interfered by intense arc light, high in calculation speed, capable of achieving automation easily and suitable for engineering application of real-time site detection.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, in particular to a method for detecting the stability of the additive manufacturing process of tungsten inert gas shielded welding (Gas tungsten arc welding, GTAW) based on arc voltage feedback. Background technique [0002] GTAW additive manufacturing is an important method of direct manufacturing technology for metal components. It has the advantages of stable forming process, small heat input, and high forming precision. It has significant advantages in the manufacture of large and complex components. Therefore, it is widely used in the manufacture of metal parts such as titanium alloys, nickel-based alloys, stainless steel, high-strength steel, and high-strength aluminum alloys. [0003] GTAW additive manufacturing generally includes steps such as establishment of a three-dimensional model of a metal component, layered slicing, forming path setting, process parameter design, an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K9/167B23K9/095
CPCB23K9/042B23K9/0953B23K9/0956B23K9/167
Inventor 熊俊李沿江雷洋洋陈辉
Owner SOUTHWEST JIAOTONG UNIV
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