Abstract
Looking at the application examples of electron beam welding in recent years, in addition to nuclear or space-related parts that require high-quality welding, lap joints such as automobiles and aircraft parts, spigot butting, or partial welding etc. has also been applied. On the other hand, regarding Electron Beam Welding (EBW) strength, there have been several reports to date on residual stress and deformation behavior of thick plates. However, there are still many unclear points regarding the behavior of thin plate welding and partial penetration welding applied to automobile parts. In addition, welding for stabilization of welding strength and dimensional characteristics related to “High Quality (Q)” and “Cost Reduction (C)” and “High Productivity (D)” (QCD), which are the three elements of the productivity index. There are no systematic study cases on optimization of processing conditions. Therefore, in this study, the ideal function was set with the characteristic value being the amount of strain in the joint due to the effect of the penetration heat energy added during welding. We propose to apply "Functionality Evaluation Method" to evaluate the characteristic value of energy that affects welding strength and dimensional accuracy.
