Method and apparatus for hard finishing modified gears
AssigneeLiebherr-Verzahntechnik GmbH
InventorsHansjoerg Geiser, Robert Wuerfel
Life of this patent
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Abstract
The present disclosure relates to a method for the manufacture of a workpiece having a corrected gear geometry and/or a modified surface structure, in particular by a hard finishing process, in particular generation grinding or honing. Provision is made in this respect that it is achieved by a direct generation of a wobble movement and/or of an eccentricity of the tool that a modification, in particular a profile modification or profile waviness, and/or a defined periodic flank waviness is generated on the active surface of the workpiece machined therewith.
Claims22
A method for manufacturing a workpiece, comprising:
- generating a modified gear flank geometry on an active surface of the workpiece by generation grinding or honing,
- wherein the modified gear flank geometry of the workpiece is generated on the active surface of the workpiece by a generation of a wobble movement of a tool or by a modified gear flank geometry of a tool, the tool being used for machining the workpiece by generation grinding or honing, the modified gear flank geometry of the tool being provided by a variation of a gear flank geometry of the tool in dependence on an angular position of the tool,
- wherein the workpiece comprises a cylindrical spur gear, a helical gear, a spherical gear, or a conical gear, and
- wherein the modified gear flank geometry of the workpiece includes at least one of a profile waviness or a defined periodic flank waviness.
A method for manufacturing a workpiece, comprising:
- machining the workpiece by generation grinding or honing using a generation grinding or honing tool, the tool having a modified gear flank geometry that comprises a variation of a gear flank geometry in dependence on an angular position of the tool, and
- in the step of machining the workpiece,
- generating a modified gear flank geometry on an active surface of the workpiece by machining the workpiece with the modified gear flank geometry of a tool,
- wherein the modified gear flank geometry of the tool is generated during dressing, and
- wherein the tool is dressed by a forming roller, the modified gear flank geometry of the tool being formed by varying an engagement depth of the forming roller during dressing of the tool in dependence on the angular position of the tool.
A method for manufacturing a workpiece, comprising
- machining the workpiece by generation grinding or honing using a generation grinding or honing tool, the tool having a modified gear flank geometry that comprises a variation of a gear flank geometry in dependence on an angular position of the tool, and
- in the step of machining the workpiece,
- generating a modified gear flank geometry on an active surface of the workpiece by machining the workpiece with the modified gear flank geometry of a tool,
- wherein the modified gear flank geometry of the tool has a constant value in a generation pattern at least locally in a first direction of the tool and is further given by a predefined non-constant function in a second direction of the tool perpendicular to the first direction.
A method for manufacturing a workpiece, comprising:
- machining the workpiece by generation grinding or honing using a generation grinding or honing tool, the tool having a modified gear flank geometry that comprises a variation of a gear flank geometry in dependence on an angular position of the tool, and
- in the step of machining the workpiece,
- generating a modified gear flank geometry on an active surface of the workpiece by machining the workpiece with the modified gear flank geometry of a tool,
- wherein the tool is dressed in the same apparatus as is used to machine the workpiece.
Dependencies are inferred from the claim text.