Drilling tool and method for modifying a blind hole
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United States of America Patent
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Mar 13, 2018
Issued Date -
N/A
app pub date -
Jun 5, 2015
filing date -
Sep 22, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a drilling tool and method for modifying a blind hole in a blade root insert of a wind turbine. The invention further relates to an apparatus and method for cleaning a blind hole. The method for modifying a blind hole comprises: removing a blade screw located in the blind hole, inserting a drilling tool into the blind hole, fixing the drilling tool in a drill, recessing the blind hole by a predetermined depth, with a maximum diameter of the end section and of the hole bottom after recessing being smaller than or equal to a diameter of the end section prior to recessing and a transition from the end section to the hole bottom being round after recessing, removing the drilling tool and the drill, mounting the blade screw in the modified blind hole.
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