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US 4,302,909 AGranted
Stressed internal face lapping tool
AssigneeGoetze AG
InventorHubert Dorner
Life of this patent
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Abstract
An apparatus for lapping an external circumferential arcuate face of a workpiece includes an axially split, radially resiliently expandable sleeve having an inner face constituting a lapping surface, an axial clamping arrangement for immobilizing the sleeve in a radially resiliently expanded condition. The apparatus has an operative state in which the sleeve is immobilized by the clamping arrangement in the radially resiliently expanded condition in which the inner diameter of the sleeve corresponds to a desired working diameter of the apparatus.
Claims9
In an apparatus for lapping an external circumferential arcuate face of a workpiece;
- the apparatus including a sleeve-like lapping tool having an inner face constituting a lapping surface;
- the improvement wherein the tool has a throughgoing slot to provide for a circumferential discontinuity in said tool and further wherein said tool is radially resiliently expandable;
- the improvement further comprising axial clamping means for immobilizing said tool;
- said clamping means having a tightened state in which said tool is immobilized in a radially outwardly deformed condition, whereby said tool, in said tightened state, has internal stresses tending to cause a radially inward contraction of said tool;
- said clamping means having a released state in which said tool is allowed to contract radially inwardly for circumferentially conforming about an outer face of a calibrating member temporarily positioned within said tool, whereby the inner diameter of said tool is calibrated to a desired working diameter of said apparatus.
2 more elements
Dependencies are inferred from the claim text.