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    • 10. 发明授权
    • Sheet-to-tube resistance spot welding using servo gun
    • 使用伺服枪的板对管电阻点焊
    • US07060929B2
    • 2006-06-13
    • US10785793
    • 2004-02-24
    • Peter C. SunPei-Chung Wang
    • Peter C. SunPei-Chung Wang
    • B23K11/10
    • B23K11/255B23K11/002B23K11/115
    • A method of spot welding a sheet overlapped to a tube with a servomotor-driven electrode applying a clamping force to the sheet. Over a first clamping time interval, the clamping force is increased to a first force level, at which point a welding current is applied to weld the sheet and tube together for a welding time interval. The first force level is maintained for a second clamping time interval, after which the clamping force is reduced to a second force level over a third clamping time interval and is maintained for a fourth clamping time interval. The welding current is removed upon expiration of the welding time interval and the clamping force is simultaneously reduced over a fifth clamping time interval, after which the electrode is disengaged from the sheet. The reduction in clamping force during the welding cycle reduces cracking of the spot weld.
    • 利用伺服电动机驱动的电极对与片材重叠的片材进行点焊以对片材施加夹紧力的方法。 在第一夹紧时间间隔内,夹紧力增加到第一力水平,此时施加焊接电流以在焊接时间间隔内将片和管焊接在一起。 第一力水平保持第二夹紧时间间隔,此后夹紧力在第三夹紧时间间隔内减小到第二力水平,并保持在第四夹紧时间间隔。 在焊接时间间隔期满后,焊接电流被去除,同时在第五夹持时间间隔内同时减少夹紧力,此后电极与片材脱离。 焊接循环期间夹紧力的降低减少了点焊开裂。