Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
1991-02-27
1993-03-30
Gorski, Joseph M.
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
29 601, 294211, 29523, 72 58, B21D 3100
Patent
active
051971887
ABSTRACT:
In the case of this process, the crankshaft is assembled from individual formed pieces each comprising a crank web and two journal projections. Journal parts belonging together are slid onto a joint sleeve which is plastically deformed by applying pressure, whereas the journal parts themselves are only deformed elastically, and as a result of their springback, they provide the necessary adhesion for the connection. Prior to being joined, the bearing journals and crank journals may be provided with bearing bushes of a material having better tribological properties and/or undivided roller bearings and also undivided connecting rods. Lubricating channels provided in the webs, annular spaces remaining between the sleeves and journals and longitudinal grooves provided in the former permit continuous lubrication of the bearing faces. Key teeth provided at the parts to be joined ensure accurate orientation of the parts relative to each other. The expanding pressure devices may be inserted into the interior of the sleeves through apertures provided in the webs. The process is also suitable for producing crankshafts whose bearing and crank journals overlap in the axial direction. Further stages of the process permit a reduction in the number of operations and relate to the arrangement of intermediate layers which improve adhesion or the leakproofness between the parts.
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Maus Wolfgang
Swars Helmut
Gorski Joseph M.
Hughes S. Thomas
Mannesmann Aktiengesellschaft
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