Grinding Worm Axial Displacement for Noise Reduction
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Solution Overview
Problem
Existing methods for grinding with a grinding worm fail to effectively improve noise behavior and productivity due to complex implementations and suboptimal surface structure modifications.
Innovation Solution
The grinding worm's axial displacement movement is composed of alternating sections in opposite directions, allowing for a modified surface structure on the tooth flank that breaks continuous grinding marks, enhancing noise behavior and productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shift movement is applied during grinding to modify surface structure and improve noise behavior, then noise behavior is improved, but the grinding process becomes more complex and productivity decreases
Solution Approach 1:
The grinding worm applies a periodic shift movement with alternating directions during the grinding process. The displacement consists of at least a first section moving in one direction and a second section moving in the opposite direction, creating periodic variations in the surface structure that improve noise behavior while maintaining productivity
Solution Approach 2:
The shift movement is made dynamic by allowing the grinding worm to change direction during the grinding process. The displacement movement includes alternating sections where the grinding worm moves first in one direction and then in the opposite direction, creating a dynamic surface modification that improves noise characteristics
2Object-affected harmful factors
If a shift movement is applied during grinding to modify surface structure, then noise behavior is improved, but the device complexity increases
Solution Approach 1:
The grinding worm serves multiple functions: it performs the primary grinding operation and simultaneously applies the shift movement to modify surface structure. This multi-functionality reduces device complexity by eliminating the need for separate mechanisms to generate the shift movement
Solution Approach 2:
The shift movement function is merged with the grinding operation. The displacement movement of the grinding worm in alternating directions combines the grinding action with the surface modification action, reducing the need for additional independent systems
3Duration of action of stationary object
If small shift amounts are used to compensate for wear, then tool life is extended, but the surface structure remains regular and noise behavior is not improved
Solution Approach 1:
The periodic alternating shift movement creates regular variations in the surface structure that interrupt parallel grinding tracks. This periodic action modifies the surface topology to reduce noise while the controlled shift amounts maintain acceptable tool life
Solution Approach 2:
The alternating direction shift movement creates asymmetric surface patterns that disrupt the formation of regular parallel grinding tracks. The asymmetric displacement in opposite directions generates a more varied surface structure that improves noise behavior
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the shifting process, improves noise behavior, and increases productivity by creating areas with diverse structures on the tooth flank, reducing dressing times and tool costs.
Implementation Method 1
a grinding process of the profiling is carried out by moving the grinding worm in the direction of the axis of the workpiece
Data Source
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AI summary
The invention relates to a method for hard finishing a workpiece (1) with a helical machining tool (2), wherein the workpiece (1) has an axis (a) and is provided with a profile (3) over its circumference, wherein the machining tool (2) has an axis (b) and is provided with a machining surface (4), wherein, with the machining surface (4) engaging the profile (3), a hard machining operation of the profile (3) is carried out by simultaneously rotating the workpiece (1) about its axis (a) and the machining tool (2) about its axis (b) in a synchronized manner, by moving the machining tool (2) in the direction of the axis (a) of the workpiece (1), wherein, during the hard machining operation, a displacement movement in the direction of the axis (b) of the machining tool (2) is superimposed on the machining tool (2).To achieve improved noise characteristics during operation of the workpiece, the invention provides that the displacement movement consists of at least a first section (5) in which the machining tool (2) is moved in one direction (R1) of its axis (b), and of at least a second section (6) in which the machining tool (2) is moved in the other direction (R2) of its axis (b).