JOINT DEVICE

To provide a joint device which increases strength of a junction part by decreasing deviation of current due to an energizing distance from supply source of current to a target portion.SOLUTION: A joint device comprises: a power supply unit 20 which generates current applied to a part to be joined; a first electrode 11 which is connected with the power supply unit 20 and contacts with a first work-piece W1; and a second electrode 12 which is connected with the power supply unit 20 and contacts with a second work-piece W2. For example, surface roughness between the first electrode 11 and the work-piece W1 and between the second electrode 12 and the work-piece W2 is adjusted according to an energizing distance, thereby the first electrode 11 and the second electrode 12 have the constitution decreasing deviation of current flowing in the work-piece W1 and the work-piece W2 regardless of respective distances to the work-piece W1 and the work-piece W2 contacting with the power supply unit 20.SELECTED DRAWING: Figure 1 【課題】電流の供給源から目的部位までの通電距離による電流の偏りを低減させ、接合部分の強度を向上させる接合装置を提供する。【解決手段】接合装置は、被接合部に印加する電流を発生させる電源部２０と、電源部２０に接続され、第１のワークＷ１に接触する第１の電極１１と、電源部２０に接続され、第２のワークＷ２に接触する第２の電極１２と、を有し、例えば、通電距離に準じて第１の電極１１と第２の電極１２とワークＷ１、Ｗ２との接触面の表面粗さを調整することにより、第１の電極１１及び第２の電極１２は、それぞれ、電源部２０と接触するワークＷ１、Ｗ２との距離によらずにワークＷ１、Ｗ２内で流れる電流の偏りを、低減させる構成を有する。【選択図】図１