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Development of Full Automatic Flash butt Welding with Digital Control

武汉理工大学学报 2006年第S3期28卷 1097-1101页

作者： WANG Rui SUN Hexu WANG Hongwen Electrical and Automation School,Hebei University of Technology,Tianjin 300130,China, Electrical and Automation School Hebei University of TechnologyTianjin 300130China

The hardware and software design of two digital control systems based on 80C196KB MCU for flash butt welder is introduced in this *** welding power supply is made of six-phase half-wave *** welding outer characteristic of welding machine is realized by digital PI algorithm with the voltage close-loop *** flashing curve is finished by elec- tric-hydraulic servo *** process control system transfers datum with power supply system by a serial communication inter- *** parameters of the control systems are collected by photoelectrical seclusion to avoid the disturbing of the electromagnetism in welding process.

关键词： flash butt welder digital control MCU PI adjustor welding power supply

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High Effective FE Simulation Methods for Deformation and Residual Stress by butt Welding of Thin Steel Plates

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Engineering（科研） 2014年第9期6卷 507-515页

作者： Mikihito Hirohata Yoshito Itoh Graduate School of Engineering Nagoya University Nagoya Japan

In order to propose high effective simulation using finite element method (FEM) for predicting deformation and residual stress generated by one pass butt welding, a series of numerical analyses were carried out. By idealizing the movement of heat source (the instantaneous heat input method), the tendency of welding out-of-plane deformation and the residual stress distribution could be predicted. The computing time was around 9% of that by the precise model with considering the movement of heat source. On the other hand, applicability of two dimensional shell elements instead of generally used three dimensional solid elements was examined. The heat input model with considering the temperature distribution in the thickness direction was proposed for the simulation by using the shell elements. It was confirmed that the welding out-of-plane deformation and residual stress could be predicted with high accuracy by the model with shell elements and the distributed heat input methods. The computing time was around 8% of that by the precise model with solid elements.

关键词： Welding Deformation Residual Stress butt Welding FEM Shell Element

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