Device and method for the machining of crankshaft pins
AssigneeMAN B&W Diesel Aktiengesellschaft
InventorsDetlev Stobbe, Bernhard Wriedt
Life of this patent
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Abstract
Disclosed is a portable apparatus for the machining of a crankshaft pin of a crankshaft installed in an engine. The apparatus is supported on the crankshaft-web side surfaces and performs economical procedures by turning, milling or grinding. The apparatus and the method applied with it achieve dimensional, shape and positional tolerances and also surface finishes as specified for constructing new crankshafts.
Claims22
A portable apparatus for surface machining a crankshaft pin surface on a radius from a central axis of the crankshaft pin, said surface being bounded by crankshaft webs, each said web having a radially-extending inner side surface, said apparatus comprising:
- an axially movable tool for rotationally machining said crankshaft pin surface;
- inner rings each having means for fixing a respective said inner ring to a respective said inner side surface;
- revolving rotating rings each guided on a respective said inner ring, said rotating rings carrying said axially moveable tool therebetween;
- and
- fixing segments attached to each said inner ring for positioning said inner rings radially with respect to said crankshaft pin surface.
A method of machining a crankshaft pin surface having a central axis being bounded by crankshaft webs, each said web having an inner side surface which is separated from the pin surface by a transition groove, said method comprising
- providing a portable surface machining apparatus comprising axially moveable tool for machining said crankshaft pin surface, inner rings which can be fixed to the inner side surface via a means for fixing, revolving rotating rings which are guided on said inner rings, and fixing segments attached to each said inner ring for positioning said inner rings radially on the crankshaft pin surface,
- positioning the machining apparatus on the pin surface using the fixing segments,
- fixing the inner rings to the inner side surfaces using the means for fixing,
- rough turning the pin surface using the apparatus,
- removing the fixing segments,
- rough turning boundary regions of the pins surface using the apparatus,
- finish machining the pin surface using the apparatus, and
- machining the transition grooves using the apparatus.
Dependencies are inferred from the claim text.