Forming characteristics of additive manufacturing process by twin electrode gas tungsten arc
| Autor: | Dayong Li, Haojun Sun, Qinglin Han, Guangjun Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Materials science Mechanical Engineering Gas tungsten arc welding chemistry.chemical_element Mechanical engineering Context (language use) Ranging 02 engineering and technology Tungsten Industrial and Manufacturing Engineering Computer Science Applications Arc (geometry) 020901 industrial engineering & automation chemistry Control and Systems Engineering Electrode Deposition (phase transition) Current (fluid) Software |
| Zdroj: | The International Journal of Advanced Manufacturing Technology. 104:4517-4526 |
| ISSN: | 1433-3015 0268-3768 |
| DOI: | 10.1007/s00170-019-04314-9 |
| Popis: | Traditional gas tungsten arc-based additive manufacturing (GTA-AM) system normally applies high-level deposition current to achieve a high deposition rate. Due to the induced high arc pressure, defects (e.g., humps) may always happen, which made the deposited beads unsuitable for additive manufacturing (AM) purposes. To solve this issue, a twin electrode approach has been applied in an implemented GTA-AM system, which achieved high deposition rate while kept the arc pressure with a relatively small value. The objective of this paper is to investigate the principles of using the twin electrode GTAW approach in an AM context. This paper first explored the maximum allowable wire feed speed (MAWFS) with regard to the deposition currents ranging from 200 to 450 A. A piecewise linear model was established to represent the relationship between the MAWFS and the current, which formed a basis for defining the feasible range of travel speed at a given deposition current. To validate the proposed principles, a case study was conducted, in which a set of deposition parameters were determined for fabricating a cube part. The deposition rate of twin electrodes GTA-AM is up to 2.7 kg/h, which is almost twice as much as that of traditional GTA-AM. |
| Databáze: | OpenAIRE |
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