Lapping tool
AssigneeSiemens Energy, Inc.
InventorHarald W. Breitkopf
Life of this patent
Estimating the term…
Abstract
A lapping tool for lapping sealing surfaces of a fitting used in a gas turbine. The tool includes a shaft having first and second ends and a longitudinal axis. A removable handle is attached to the first end and is oriented in a direction transverse to the axis. The tool also includes a removable lapping insert having an outwardly extending attachment portion that is attached to the second end of the shaft. The lapping insert includes a lapping surface which corresponds to the shape of a sealing surface of the fitting. In one embodiment, the lapping insert includes a cavity for receiving a cone portion of a fitting. Alternatively, the lapping insert includes a projection for insertion into a receptacle portion of a fitting.
Claims13
A lapping tool for lapping sealing surfaces of a fitting used in a gas turbine, comprising:
- a shaft having first and second ends and a longitudinal axis;
- a removable handle attached to the second end of the shaft;
- and
- first and second removable lapping inserts, each having an outwardly extending attachment portion for attachment to the first end of the shaft, wherein the lapping inserts each include a lapping surface which corresponds to the shape of a sealing surface of the fitting and wherein:
- the first lapping insert includes a cavity defining a tapered lapping surface for receiving and lapping an exterior surface of a first portion of the fitting;
- and
- the second lapping insert includes a projection defining a tapered lapping surface for insertion into and lapping an interior surface in a second portion of the fitting, wherein the second portion of the fitting forms a receptacle portion for sealingly receiving the first portion of the fitting.
A method for lapping first and second portions of a fitting, comprising:
- attaching a removable first lapping insert to a shaft, wherein the first lapping insert is configured to lap a sealing surface of the first portion;
- lapping the sealing surface of the first portion of the fitting;
- removing the first lapping insert from the shaft;
- attaching a removable second lapping insert to the shaft, wherein the second lapping insert is configured to lap a sealing surface of the second portion;
- lapping the sealing surface of the second portion of the fitting;
- removing the second lapping insert from the shaft;
- attaching a reference tool to the shaft;
- and
- checking for high spots on a lapped sealing surface.
Dependencies are inferred from the claim text.