Work holders – Holder inserted within work aperture – Expandable mandrel
Patent
1993-06-22
1995-02-14
Watson, Robert C.
Work holders
Holder inserted within work aperture
Expandable mandrel
B23B 3140
Patent
active
053888146
ABSTRACT:
A device for the simultaneous hydraulic expansion of a plurality of longitudinal portions of a hollow shaft for the production of force-locking and/or positive-locking connections between the latter and elements slid thereon, (such as cams, toothed wheels or bearing seats), in the form of a pressure medium probe. This comprises at least one longitudinally extending feed channel and radial feed bore holes to every longitudinal portion of the hollow shaft to be expanded, which is characterized by a sealing arrangement which seals longitudinal portions of the hollow shaft remaining undeformed against the action of the pressure medium from longitudinal portions of the hollow shaft to be expanded. These lie between them wherein the probe includes a one-piece probe body with annular grooves arranged in a spaced manner, wherein expansion arrangements are received by the grooves and an expansion arrangement includes a one-piece expansion sleeve which covers the entire expansion area; it can be acted upon from the inside by pressure medium along substantial portions of its length and is radial expandable, wherein its surface contacts the inner surface of the hollow shaft during the hydraulic expansion of the hollow shaft.
REFERENCES:
patent: 3388916 (1968-06-01), Winnen et al.
patent: 4253694 (1981-03-01), Walter et al.
patent: 4317577 (1982-05-01), Cameron
patent: 4368996 (1983-01-01), Davis et al.
patent: 4616392 (1986-10-01), Snyder
patent: 4624184 (1986-11-01), Katz et al.
patent: 4840323 (1989-06-01), Nakajima
Frielingsdorf Herbert
Grewe Heribert
Palussek Arnold
Riemscheid Helmut
Schulze Rudolf
Emitec Gesellschaft fur Emissionstechnologie mbH
Watson Robert C.
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