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    • 5. 发明申请
    • METHOD FOR TIGHTENING A SCREW CONNECTION AND SCREW DRIVING TOOL
    • 螺丝连接和螺丝驱动工具的方法
    • US20100059240A1
    • 2010-03-11
    • US12296826
    • 2007-03-24
    • Heike Schmidt
    • Heike Schmidt
    • B25B21/00B25B23/147H02P7/28
    • B25B23/14B25B21/00
    • Disclosed is a method for screwing in and tightening a screw connection (1) to a predetermined tightened level (2), especially a predetermined torque level (2) or a predetermined pretension level, with the aid of a hand-held screwing tool (3) comprising a regulated drive unit (4) and/or control functionality, particularly an electric nut runner (3). A tightening phase (B-C-D), during which the screw head rests against the supporting surface (6) of the screw connection (1), starts following a screwing phase (A). In order to improve said method, the speed (N) of the screwing tool (3) is increased to an output speed (7) for the tightening phase (B-C-D) within an acceleration time (8) in the tightening phase (B-C-D) and is lowered within a delay time (9) prior to or until reaching the predetermined tightened level (2). The combined acceleration time (8) and delay time (9) represents the predominant part of the entire tightening phase (B-C-D), especially in relation to the traveled angle of twist (W) of the screw connection (1), the acceleration time (8) being shorter than the delay time (9).
    • 公开了一种用于通过手持式螺丝刀(3)将螺钉连接件(1)拧紧并拧紧到预定的紧固水平(2),特别是预定扭矩水平(2)或预定的预紧力水平的方法 )包括调节驱动单元(4)和/或控制功能,特别是电动螺母扳手(3)。 拧紧相位(B-C-D),其中螺钉头靠在螺钉连接件(1)的支撑表面(6)上,开始遵循螺纹连接(A)。 为了改善所述方法,在紧固阶段(BCD)中,加速时间(8)内的拧紧工具(3)的速度(N)增加到紧固阶段(BCD)的输出速度(7),以及 在延迟时间(9)之前或直到达到预定的收紧水平(2)来降低。 组合的加速时间(8)和延迟时间(9)代表整个紧固阶段(BCD)的主要部分,特别是相对于螺旋连接(1)的行进旋转角(W),加速时间 8)比延迟时间短(9)。