電磁圧接におけるアルミニウム板と銅板の連続衝突過程の変形解析と接合パラメータに及ぼす間隙長の影響

抄録

In magnetic pulse welding to the fixed copper sheet of the moving aluminum sheet, collision velocity is important to affect the impact pressure applied to the fixed sheet, which varies by gap length. When the moving sheet collided with the fixed sheet, the impact pressure is estimated with a compression stress generated on the moving sheet, and the maximum is approximately 4 GPa at a discharge energy of 2.0 kJ. When the discharge energy is constant, the maximum impact pressure is proportional to the collision velocity. During the continuous collision process, the two sheets repeatedly come into contact and separate, in other words, vibrate. A collision angle and a velocity of a collision point are a joining parameter in the process, and are affected by the vibration. The analysis were compared with the interface observations of a welded sheet. In the joining region of the welded sheet, the range of collision angles was from 3.0° to 32.9° and the range of the velocities of the collision point was from 5.6 km∙s ^-1 to 0.72 km∙s ^-1 . The vibration of the two sheets during the process and numerical values of the joining parameter in the joining region were clarified.