EXPANSION TOOL FOR COLD EXPANSION OF HOLES
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United States of America Patent
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Issued Date -
May 7, 2009
app pub date -
Apr 20, 2007
filing date -
Apr 24, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A tool (10) for cold expansion of holes comprises a body (14) which has at least a cylindrically shaped part (16) having an inner hole (24) in axial direction of the body (14). The body (14) comprises along the circumferential direction a plurality of members (18, 18a, 18b, 18c) which are movable in radial direction of the body (14), such that the outer diameter of the cylindrically shaped part (16) of the body (14) can be changed. Furthermore a core (26, 26c) is provided which is insertable into the inner hole (24), wherein at least one of the core (26, 26c) and the inner hole (24) comprises a portion (28) of changing diameter and the inner hole (24) and the core (26, 26c) get into contact with each other upon insertion of the core, such that in dependency of the depth of the insertion of the core (26, 26c) into the inner hole (24) in axial direction the members (18, 18a, 18b, 18c) move radially outwardly and the outer diameter of the cylindrically shaped part (16) of the body (14) increases.
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