Method for fine machining cylindrical inner surfaces
OwnerUlrich Haerer, Franz Rueckert +3inventors
InventorsUlrich Haerer, Franz Rueckert, Helmut Schaefer, Peter Stocker, Oliver Storz
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Abstract
The invention relates to a method for fine machining a cylindrical inner surface which has materials of different hardnesses in the axial direction, and comprises the following steps: pre-turning of the surface, with at least one softer area of the surface being pre-turned to a greater diameter than a harder area, honing of at least the harder area down to the diameter level of the softer area.
Claims34
-7. (canceled)
A method for fine machining a cylindrical inner surface, in particular a cylinder running surface, which has materials of different hardnesses in the axial direction, comprising the following steps:
- pre-turning of the cylindrical inner surface, with at least one softer area of the cylindrical inner surface being pre-turned to a greater diameter than at least one harder area, and
- honing of at least the harder area down to the diameter level of the softer area.
A method of making an engine cylinder assembly comprising:
- casting a cylinder casing with a cylindrical inner surface from a material with cylinder casing hardness,
- inserting a cylinder liner into the cylinder casing to line an axial portion of the casing cylindrical inner surface, said cylinder lining material having a different hardness than said cylinder casing hardness,
- pre-turning of the cylindrical inner surface formed by the cylinder casing and cylinder lining with at least one softer area of the surface being pre-turned to a greater diameter than a harder area, and
- honing of at least the harder area down to a diameter level of the softer area.
Dependencies are inferred from the claim text.