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Digital Simulation System of Metal Arc Welding Process

Author: ZuoMingLei
Tutor: GengZheng
School: Harbin Institute of Technology
Course: Materials Processing Engineering
Keywords: Electrode Arc Droplet transfer Digitized analog system Simulation model
CLC: TG444
Type: Master's thesis
Year: 2008
Downloads: 29
Quote: 0
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Abstract


Electrode Arc has been widely used due to its advantages in the production practice , the mathematical modeling of the welding process is to achieve a the digitization process control of welding process high level of foundation . In this paper, the method of computer simulation of the process of Electrode Arc -depth study. First, by droplet transfer mechanism and influence factors analysis Electrode Arc , and laid the foundation to establish a digital model . Secondly, using Matlab software in the establishment of the power - arc system simulation model , arc nonlinear load simulation model and determine the arc length of the simulation model based on the different forms of droplet transfer jet transition , drop-like transition , short circuit the transition process modeling, the model considers the droplet grew up on the arc length , the establishment of a model of droplet growth process , and consider the interference due to noise , welding torch instability brought on the welding process impact of the jet transition , the dropwise transition automatically shift to short-circuit the transition , so that the model can be more accurately and comprehensively reflect Electrode Arc process . The simulation model is a combination of graphics , intuitive and effective characterization of all aspects of the characteristics . Obtained through the operation of the digital model , of each of the welding parameters of the simulation value and trend graph comparing different droplet transfer three forms , the droplet size of the welding parameters and their waveforms studied it with molten drops to the transition frequency of the relationship, but also the relationship between some important parameters were analyzed . The simulation analysis of the results obtained are compared with the available experimental data , and results are basically consistent , and the conclusion is in line with the theoretical analysis and experimental requirements . The study results show that : the established the digitized analog system can accurately simulate the melting polar arc welding process , the establishment of the system is reasonable and practical .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Welding process > Arc welding
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