INSTALLATION METHOD FOR AN EXPANSION ANCHOR AND IMPACT SCREWDRIVER FOR INSTALLING AN EXPANSION ANCHOR

An installation method for an expansion anchor is carried out by repeatedly exerting rotary-percussive strikes onto the shank (2) of the expansion anchor (1) by an impact screwdriver. The repeat rate (Ntarget) of the rotary-percussive strikes is selected as a function of the tightening torque prescr...

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Hauptverfasser: APPL JOERG, KHANDOZHKO SERVEY, SCHMIDT PEER
Format: Patent
Sprache:eng
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Zusammenfassung:An installation method for an expansion anchor is carried out by repeatedly exerting rotary-percussive strikes onto the shank (2) of the expansion anchor (1) by an impact screwdriver. The repeat rate (Ntarget) of the rotary-percussive strikes is selected as a function of the tightening torque prescribed for expanding the expansion sleeve (3) of the expansion anchor (1). The impact screwdriver stops generating rotary-percussive strikes when the detected mean rotational speed (d) of the shank falls below a threshold value (D).