Double-variable Decoupling Control for Pulse MIG Welding Process of Aluminum Alloy

2011 ◽  
Vol 47 (08) ◽  
pp. 88
Author(s):  
Lihui LU
Keyword(s):  
Aluminum Alloy ◽  
Welding Process ◽  
Decoupling Control ◽  
Mig Welding

Weld Width Control System for Pulsed MIG Welding of Aluminum Alloy

2011 ◽  
Vol 299-300 ◽  
pp. 908-911
Author(s):  
Li Hui Lu ◽  
Ding Fan ◽  
Jian Kang Huang ◽  
Ming Zhu ◽  
Yu Shi
Keyword(s):  
Aluminum Alloy ◽  
Control System ◽  
Welding Process ◽  
Pulse Method ◽  
High Energy ◽  
Double Pulse ◽  
Mig Welding ◽  
Heat Accumulation ◽  
Weld Width ◽  
Vision Sensing

Due to strong heat accumulation and low surface tension of aluminum alloy, weld width will become wider, even subsidence in pulsed MIG welding process of aluminum alloy at constant parameters. A variable double-pulse method for weld width control is proposed. Weld width control is realized by changing double-pulse duty cycle that is the ratio of high-energy pulse time in a double-pulse cycle to adjust heat input based on the vision sensing for weld width. A rapid prototyping control system is built on the basis of vision sensing and xPC Target real-time environment. Then variable double-pulse MIG welding process test is done and proves the feasibility of the control scheme. On this basis, weld width control test in pulsed MIG welding of aluminum alloy is carried out and obtains a good weld with beautiful formation and uniform weld width. The results show that weld width control can be realized well with the variable double-pulse method in pulsed MIG welding of aluminum alloy.

Comparison between Plasma-MIG and MIG Procedures on 5A06 Aluminum Alloy

2008 ◽  
Vol 575-578 ◽  
pp. 1382-1388 ◽  
Author(s):  
Hong Ming Gao ◽  
Yan Bai ◽  
Lin Wu
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Mechanical Performance ◽  
Weld Zone ◽  
Welding Process ◽  
Deposition Efficiency ◽  
Eutectic Structure ◽  
Melting Rate ◽  
Mig Welding ◽  
5A06 Aluminum Alloy

10mm-5A06 aluminum alloy was butt-welded in a single pass by the plasma-gas metal arc (plasma-MIG) welding procedure, the joints were subjected to X-ray inspection, the microstructure and mechanical performance of weld were also studied. The results indicate that plasma-MIG welding is superior to regular conventional MIG welding on the aspects of reducing weld porosity, increasing joint quality and improving deposition efficiency. Good weld joint with less porosity and excellent mechanical properties is obtained, which can reach as 92.62% tensile strength and 85.12% elongation percentage as base metal. Dimples in which the precipitated phase is the solid solution based on Al3Mg2 are observed in fracture scanning electron micrograph and the fracture mode is ductile rupture. α-Al and Al3Mg2 ,α-Al and eutectic structure are observed respectively in fusion area and in weld zone. The wire feed rate and melting rate can come to 14.5m/min and 80g/min respectively for the 1.6mm welding wire by the plasma-MIG welding process on the premise that the tensile strength of the joints meet the requirements.

Investigation of A5052 Aluminum Alloy to SS400 Steel by MIG Welding Process

2018 ◽  
pp. 645-656
Author(s):  
Quoc Manh Nguyen ◽  
Huong Thao Dang Thi ◽  
Van Thinh Nguyen ◽  
Minh Hue Pham Thi ◽  
Khac Thong Nguyen ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Welding Process ◽  
Mig Welding

scholarly journals Double-Pulse Triple-Wire MIG Welding of 6082-T6 Aluminum Alloy: Process Characteristics and Joint Performances

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1388
Author(s):  
Ke Yang ◽  
Fei Wang ◽  
Hongbing Liu ◽  
Peng Wang ◽  
Chuanguang Luo ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
High Efficiency ◽  
Welding Process ◽  
Pulse Frequency ◽  
Double Pulse ◽  
Fish Scale ◽  
Mig Welding ◽  
Process Characteristics ◽  
Pulse Welding

High-efficiency and high-quality welding has always been the focus of welding research. This article proposes a novel double-pulse, triple-wire MIG welding process for the welding of 6082-T6 aluminum alloy. The process characteristics of welding arc and droplet transfer were studied, and the performances of weld formation, morphology, hardness, and tensile strength were tested for the 1 Hz, 3 Hz, and 5 Hz double-pulse welding and normal-pulse welding. It was found that in the welding process, the pulsed arc steadily alternated among three welding wires without arc interruption, and the arc length changed periodically with the double-pulse frequency. The droplets transferred with a stable one-pulse-one-drop mode. Besides, a proper double-pulse frequency, e.g., 3 Hz in this case, was conducive to forming good welds with regular fish-scale patterns and no pores. The tensile strength of the joint could reach 64% of the base material’s tensile strength, and its fracture belonged to plastic fracture, which occurred in the HAZ. This new welding method will have great potential in aluminum alloy welding.

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