Method and apparatus for reprofiling wheels
AssigneeWilhelm Hegenscheidt Gesellschaft mbH
InventorTheodor Dombrowski
Life of this patent
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Abstract
The present invention relates to a method and apparatus for reprofiling the wheels of a railroad wheelset by circumferentially milling the wheelset while the wheels are driven and partly supported by drive rollers, the wheelset being partly supported at its bearing housing. Before profile milling, a reference surface is created by a turning operation as base for measuring the radial infeed of the profile milling cutter. The turning tool required is disposed on the profile milling cutter which is lockable secure against rotation. By coordinating the position of the milling devices with the position of the respective turning devices a positional relation is automatically established between the milling device and the axis of the wheelset.
Claims9
The method of reprofiling the wheels of a railroad wheelset by a circumferential milling operation utilizing at least one milling cutter per wheel, comprising the steps of partially supporting the wheelsets at the bearing housing thereof, causing each wheel to be engaged by drive and support rollers, providing a turning means adjacent each said wheel, causing a turning operation to be performed on said wheels at laterally limited zones within the area to be reprofiled, said turning operations being effected to a minumum depth at least sufficient to produce a circumferential clean surface throughout said zone and a maximum depth not greater than the cutting depth needed to produce the revised profile, establishing a predetermined heightwise relation between the turning means for each of said wheels, providing a milling apparatus including milling cutter drive means adapted to mill each of said wheels, the spacing of the cutting components of each said milling apparatus from the axis of said wheelset being coordinated with the spacing of said turning means for each respective wheel whereby the establishment of a predetermined spacing of each said turning means from said wheel axis also establishes a predetermined relation of a said milling apparatus and said axis, and thereafter milling the entirety of said surfaces to be profiled utilizing the position of said turning means following formation of said turned zones as a reference to establish the amount of radial infeed for said milling operation.
In an apparatus for the reprofiling of the wheels of a railroad wheelset by a circumferential milling operation comprising a pair of support means for said wheels, said support means each including portions engaging a bearing housing and a pair of rollers engaging at least the tread of a wheel, at least one of said rollers being driven to effect rotation of its associated wheel, means for moving said support means both horizontally and vertically, said apparatus including means for resisting movement of said wheels in the direction of the horizontal component of a cutting force applied to said wheels, the improvement which comprises first and second turning means each moveably mounted relative to a respective one of said wheels for forming a circumferential cut about a peripherial zone forming a portion of the area of the wheel to be reprofiled to define a reference surface, milling means including cutter drive means moveable relative to said wheels for reprofiling said wheels, said milling means being in a predetermined positon relative to said turning means, and means for sensing said reference surface and correlating the movement of said milling means with the position of said turning means to effect a desired depth of cut in accordance with said reference surface formed by said turning means.
Dependencies are inferred from the claim text.