Method of producing a toothed workpiece having a modified surface geometry
AssigneeLiebherr-Verzahntechnik GmbH
InventorRobert WUERFEL
Life of this patent
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Abstract
A toothed workpiece having a modified surface geometry may be produced by a diagonal machining method by means of a modified tool. The modification of the tool can be described at least approximately at least locally in the generating pattern in a first direction of the tool by a linear and/or quadratic function; the coefficients of this linear and/or quadratic function are formed in a second direction of the tool which extends perpendicular to the first direction. A pitch and/or crowning of the modification varies in dependence on the angle of rotation of the tool and/or on the tool width position, and a tooth thickness of the modified tool varies in a non-linear manner in dependence on the angle of rotation of the tool and/or on the tool width position.
Claims20
A method of producing a toothed workpiece having a modified surface geometry by a diagonal generating method by means of a modified tool, wherein a tool is used for producing the modification of the workpiece whose surface geometry comprises a modification which can be described at least approximately at least locally in the generating pattern in a first direction of the tool by a linear and/or quadratic function;
- wherein the coefficients of this linear and/or quadratic function are formed in a second direction of the tool which extends perpendicular to the first direction by coefficient functions FFtC,1 for the constant portion, FFtL,1 for the linear portion, and/or FFtQ,1 for the quadratic portion, with FFtC,1 depending in a non-linear manner on the position in the second direction and FFtL,1 being non-constant;
- and/or a modification whose pitch and/or crowning varies in dependence on the angle of rotation of the tool and/or on the tool width position;
- and whose tooth thickness varies in a non-linear manner in dependence on the angle of rotation of the tool and/or on the tool width position.
A method of producing a toothed workpiece having a modified surface geometry by a diagonal generating method by means of a modified tool, wherein a specific modification of the surface geometry of the tool is produced in that the position of the dresser with respect to the tool is varied during dressing in line contact in dependence on the angle of rotation of the tool and/or on the tool width position;
- and/or wherein a tool is used whose surface geometry comprises a modification which can be described at least approximately in the generating pattern at least locally in a first direction of the tool by a constant, linear and/or quadratic function, with the coefficients of this constant, linear and/or quadratic function being formed in a second direction of the tool which extends perpendicular to the first direction by coefficient functions FFtC,1, FFtL,1 and/or FFtQ,1, and/or wherein a tool is used whose surface geometry comprises a modification whose pitch and/or crowning varies in dependence on the angle of rotation of the tool and/or on the tool width position;
- wherein a desired modification of the workpiece is specifiable as a superposition of a plurality of crownings with directions freely selectable within specific conditions;
- and/or wherein a desired profile crowning is specifiable.
A method of producing a toothed workpiece having a modified surface geometry by a diagonal generating method by means of a modified tool and a modification of machine kinematics during the machining process of the workpiece;
- wherein a determination is made from a desired modification of the surface geometry of the workpiece of a modification of the surface geometry of the tool suitable for producing said desired modification and of a suitable modification of the machine kinematics during the machining process;
- wherein the modification of the surface geometry of the tool can be produced in that the position of the dresser with respect to the tool is varied during dressing in line contact in dependence on the angle of rotation of the tool and/or the tool width position;
- and/or with the surface geometry of the tool comprising a modification which can be described at least approximately in the generating pattern at least locally in a first direction of the workpiece by a constant linear and/or quadratic function, with the coefficients of this constant, linear and/or quadratic function being formed in a second direction of the tool which extends perpendicular to the first direction by coefficient functions FFtC,1, FFtL,1 and/or FFtQ,1:
- wherein the desired modification of the workpiece is specifiable as a superposition of at least one crowning with an end relief of the workpiece.
A method of producing a toothed workpiece having a modified surface geometry by a diagonal generating method by means of a modified tool, wherein a specific modification of the surface geometry of the tool is produced in that the position of the dresser with respect to the tool is varied during dressing in line contact in dependence on the angle of rotation of the tool and/or on the tool width position;
- and/or wherein a tool is used whose surface geometry comprises a modification which can be described at least approximately in the generating pattern at least locally in a first direction of the tool by a constant, linear and/or quadratic function, with the coefficients of this constant, linear and/or quadratic function being formed in a second direction of the tool which extends perpendicular to the first direction by coefficient functions FFtC,1, FFtL,1 and/or FFtC,1;
- and/or wherein a tool is used whose surface geometry comprises a modification whose pitch and/or crowning varies in dependence on the angle of rotation of the tool and/or on the tool width position;
- and wherein the modification of the tool by the diagonal generating method produces a corresponding modification on the surface of the workpiece, wherein the desired modification of the workpiece is specifiable as a waviness having an amplitude which has a non-constant value transversely to the direction of propagation of the waviness.
A method of producing a toothed workpiece having a modified surface geometry by a diagonal generating method by means of a modified tool, wherein a specific modification of the surface geometry of the tool is produced in that the position of the dresser with respect to the tool is varied during dressing with line contact in dependence on the angle of rotation of the tool and/or the tool width position;
- wherein the modification of the tool by the diagonal generating method produces a corresponding modification on the surface of the workpiece;
- wherein the modification produced on the workpiece by the modified tool can be described at least approximately in the generating pattern at least locally in a first direction of the workpiece by a linear and/or quadratic function;
- wherein the coefficients of this linear and/or quadratic function are formed in a second direction of the workpiece which extends perpendicular to the first direction by coefficient functions FFtC,2, FFtL,2 and/or FFtQ,2, and/or the modification produced on the workpiece by the modified tool in a first direction has a pitch and/or crowning which varies in dependence on the angle of rotation of the workpiece and/or on the workpiece width position;
- wherein the first direction extends on the workpiece at an angle of less than 10°, in parallel with the line of action of the gear.
Dependencies are inferred from the claim text.