超音波溶接に関する研究 (4) : 溶接片の形状効果の改善について

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The weld strength of ultrasonic welding is affected by the vibration characteristics of specimens, and the welding is almost impossible in the case the upper specimen is at anti-resonance condition of longitudinal vibration. Weldment surface conditions have direct effects on the weld strength, and the adequate inserted materials to the welding surfaces such as grease or certain kind of polymers are very effective to weld successfully. The purpose of the study is to investigate the effects of the inserted materials on the weld strength fluctuation by specimens vibration and to find out the methodes effective to improve the weld strength fluctuation by specimens vibration. The welding equipment with vibration frequency auto-tracking and constant vibration velocity controller is used, and the input high frequency current, input power to welding system and tip vibration amplitude etc. are measured and recorded. The results obtained are as follows; 1) The inserted materials to welding surfaces are effective to improve the weld strength fluctuation by lower specimens longitudinal anti-resonance vibration. 2) The upper specimen length effect impossible to weld is not improved by inserted materials. 3) Adequate change of welding tip vibration direction is effective to avoid the difficulties caused by upper specimen longitudinal anti-resonance vibration. 4) Phase change of reflected wave along the specimens with metal block clamping of upper specimen at the adequate positions etc. is effective to avoid the welding difficulties caused by upper specimen vibration.
社団法人溶接学会の論文
1979-08-05

超音波溶接に関する研究 (4) : 溶接片の形状効果の改善について

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