Back to results
US 2017/0008148 A1Published application
Method of dressing a tool
AssigneeLiebherr-Verzahntechnik GmbH
InventorRobert WUERFEL
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a method of dressing a tool which can be used for the gear manufacturing machining of a workpiece on a dressing machine, wherein the dressing takes place with line contact between the dresser and the 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 during dressing is varied in dependence on the tool width position.
Claims20
A method of dressing a tool, which can be used for the gear tooth machining of a workpiece, on a dresser,
- wherein the dressing takes place with line contact between the dresser and the 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 in dependence on the tool width position during dressing,
- wherein the specific modification of the surface geometry of the tool produced by the change of the position of the dresser with respect to the tool when dressing in dependence on the tool width position is specifiable at a rolling angle as a function C0FS of the position in the tool width direction and at least the pitch of the surface geometry of the tool is specifiable as a function of the position in the tool width direction in a first direction of the tool which has an angle ρFS to the tool width direction;
- and/or
- wherein the specific modification of the surface geometry of the tool produced by the change of the position of the dresser with respect to the tool when dressing in dependence on the tool width position is specifiable as a function of the tool width position at at least two rolling angles;
- and/or
- wherein the specific modification of the surface geometry of the tool produced by the change of the position of the dresser with respect to the tool when dressing in dependence on the tool width position is specifiable as a function of the tool width position at at least one rolling angle and additionally an association of a specific radius of the dresser with a specific radius of the tool takes place, with the association being specifiable as a function of the tool width position;
- and/or
- wherein at least the pitch of the specific modification of the surface geometry of the tool produced by the change of the position of the dresser with respect to the tool when dressing in dependence on the tool width position is specifiable as a function of the position in the tool width position in a first direction of the tool which has an angle ρFS to the tool width direction and additionally an association of a specific radius of the dresser with a specific radius of the tool takes place, with the association being specifiable as a function of the tool width position;
- and/or
- wherein at least the crowning of the specific modification of the surface geometry of the tool produced by the change of the position of the dresser with respect to the tool when dressing in dependence on the tool with position is specifiable as a function of the position in the tool width direction in a first direction of the tool which has an angle ρFS to the tool width direction;
- and/or
- wherein a modification of the tool is specifiable or is produced which can be described at least approximately in the generating pattern at least locally in a first direction of the tool by a linear and/or quadratic function, with the coefficients of the linear and/or quadratic function being formed in a second direction of the tool which is perpendicular to the first direction by coefficient functions FFtC,1 for the constant portion and FFtL,1 for the linear portion and/or FFtQ,1 for the quadratic portion, with FFtC,1 not depending linearly on the position in the second direction and FFtL,1 not being constant;
- and/or
- wherein a modification of the tool is specifiable or is produced whose pitch and/or crowning varies in dependence on the angle of rotation of the tool and/or on the tool width position, with additionally the tooth thickness varying non-linearly in dependence on the angle of rotation of the tool and/or on the tool width position;
- and/or
- wherein at least two degrees of freedom of the relative position of the dresser with respect to the tool are specifiable and/or are controlled when dressing in line contact independently of one another as a function of the tool width position.
14 more elements
A dressing machine having a tool holder for holding the tool to be dressed and a dresser holder for holding the dresser used for this purpose,
- wherein the dresser holder has an axis of rotation, and wherein the dressing machine has an axis of movement by which the tool width position can be set,
- wherein the dressing machine has further axes of movement by which at least a further two degrees of freedom of the relative position between the tool and the dresser can be set independently of one another, and wherein the dressing machine has a control by which the setting of the further two degrees of freedom, can be specified and/or controlled in line contact with the dresser independently of one another as a function of the tool width position;
- and/or
- wherein the dressing machine has a control having an input function by which the desired modification of the tool is specifiable as a function of the tool width position;
- wherein the control has a calculation function which determines from the desired modification the settings of the axes of movement required for the production of said specific modification during dressing with line contact between the dresser and the tool as a function of the tool width position;
- wherein the control has a control function which carries out the corresponding setting of the axes of movement during the dressing with line contact between the dresser and the tool as a function of the tool width position;
- and/or
- wherein the input function, the calculation function and the control function are configured such that the specific modification of the surface geometry of the tool is specifiable at a rolling angle as a function C0FS of the position in the tool width direction and such that at least the pitch and/or crowning of the surface geometry of the tool is specifiable in a first direction of the tool which has an angle ρFS to the tool width direction as a function of the position in the tool width direction, with the modification being able to be produced by the setting of the axes of movement of the dressing machine carried out by the control function;
- and/or
- wherein the input function, the calculation function and the control function are configured such that the specific modification of the surface geometry of the tool is specifiable as a function of the tool width position at at least two rolling angles, with the modification being able to be produced by the setting of the axes of movement of the dressing machine carried out by the control function;
- and/or
- wherein the input function, the calculation function and the control function are configured such that the specific modification of the surface geometry of the tool is specifiable as a function of the tool width position at at least one rolling angle and in addition an association of a specific radius of the dresser with a specific radius of the tool takes place, with the modification being able to be produced by the setting of the axes of movement of the dressing machine carried out by the control function, with the association being specifiable as a function of the tool width position;
- and/or
- wherein the input function and the calculation function are configured such that a specific modification of the surface geometry of the tool is specifiable or is produced which can be described at least approximately in the generating pattern at least locally in a first direction of the tool by a linear and/or quadratic function, with the coefficients of this linear and/or quadratic function being formed in a second direction of the tool which is perpendicular to the first direction by coefficient functions FFtC,1 for the constant portion and 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 with FFtL,1 being non-constant;
- and/or
- wherein the input function and the calculation function are configured such that a specific modification of the surface geometry of the tool is specifiable or is produced whose pitch and/or crowning varies in dependence on the angle of rotation of the tool and/or on the tool width position, with additionally the tooth thickness varying non-linearly in dependence on the angle of rotation of the tool and/or on the tool width position.
13 more elements
Dependencies are inferred from the claim text.