超音波溶接に関する研究 (3) : 溶接部の介在物による効果

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In the case of ultrasonic welding of metal specimens, special specimen surface treatments such as resistance welding are usually not required, and the fact is shown that the weld strength of ultrasonic welding specimens with clean surface is high. The purpose of the study is to investigate the effects of specimen surface conditions on weld strength and input power to the welding system. Welding tip vibration direction of ultrasonic welding is parallel to welding specimen surfaces, and it is expected that the contacting surface conditions of welding tip, welding specimens and welding anvil have direct effects upon the input power and the weld strength. The welding system with 20 kHz resonance frequency autotracking & constant vibration velocity controller is used to weld aluminum plate specimens. Welding vibration amplitude, vibrating frequency, input high frequency current (fundamental frequency component) and input power to welding system are measured by detectors and recorded. with muliti-channel pen recorder. The results obtained are as follows; 1) The clean condition of the specimen surfaces contacting with welding tip & anvil is desirable for successful welding. 2) Adequate material (such as certain polymer, thin plastics film, grease etc.) inserted to the welding surfaces is very effective to obtain high and stable weld strength. 3) The input power and the welded area of the specimens with the inserted material to weldment become larger and the welded area is more concentrated than clean surface specimens without the inserted material. 4) By X-ray diffraction method, it is shown that recrystallization is present in the successfully welded area, and it is suggested that the mutual velocity of welding surfaces become larger by insertion of material such as grease etc. and successful welding becomes possible.
社団法人溶接学会の論文
1979-04-05

超音波溶接に関する研究 (3) : 溶接部の介在物による効果

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