Method for rolling a shaft or tenon having cross-bored holes
AssigneeWilhelm Hegenscheidt Gesellschaft mbH
InventorGarri Berstein
Life of this patent
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Abstract
The milling of work pieces having at least one bore in the surface to be milled by roller action, is performed by controlling the size of the force applied to the work piece surface in accordance with the rotation of the work piece and in accordance with the location of the bore. The control is such that the rolling force or pressure applied when the roller contacts the bore is smaller than the rolling force or pressure when the roller contacts the work piece surface outside the bore. The rolling force may even be applied in a pulsating manner in the zone of a bore. A minimum of the applied rolling force is reached at the latest when the roller passes over the bore diameter. In this manner undesirable deformations of the work piece surface, especially in a ring zone around the bore, are avoided.
Claims12
A method for milling with milling roller means a surface of a work piece having at least one bore defining a bore range on said surface of said work piece, comprising the following steps:
- (a) causing relative rotation between said work piece and said milling roller means while simultaneously applying a compression force between said milling roller means and said work piece surface,
- (b) controlling the size of said compression force applied between said milling roller means and said work piece surface in accordance with such a control function that a starting static compression force applied to said work piece surface outside said bore range is reduced to a lower compression force in said bore range of said surface where said bore is located, so that the rolling force per unit area being rolled remains substantially constant, and
- (c) synchronizing said controlling of said compression force with said relative rotation so that said lower compression force reaches its minimum at the latest when said milling roller means align with a diameter of said bore.
Dependencies are inferred from the claim text.