Finishing Tool with Variable Cutting Width for Axial Contour Correction
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Solution Overview
Problem
Conventional finishing processes are limited in their ability to significantly influence or change the axial contour of machined workpiece sections, particularly in maintaining precise shape values and correcting long-wave defects such as ovals or squares, which are not effectively addressed by existing methods like grinding or traditional finishing tools.
Innovation Solution
A finishing tool with a cutting surface whose effective width varies in the longitudinal direction, featuring a recess that reduces the cutting agent presence in certain areas, allowing for targeted material removal and contouring without altering the finish machine, enabling the generation of desired surface line shapes and correcting long-wavelength errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional finishing tool with uniform cutting surface is used, then the finishing process is simple and reliable, but the ability to influence axial contour and correct long-wave defects is limited
Solution Approach 1:
The cutting surface is designed with non-uniform effective width, where different axial regions have different cutting capabilities. The recesses create zones with reduced cutting agent presence, allowing selective material removal in specific areas to correct long-wave defects and achieve desired axial contours while maintaining overall process reliability
Solution Approach 2:
The cutting surface is segmented into different functional zones through recesses, creating distinct areas with varying effective widths. This segmentation allows the finishing tool to address different contour requirements in different axial regions, improving precision without requiring complete redesign of the entire tool
2Manufacturing precision
If the effective width of cutting surface is reduced in certain areas, then long-wave defects can be corrected, but the total material removal capability is reduced
Solution Approach 1:
The recesses create localized zones with reduced cutting capability precisely where long-wave defect correction is needed, while other areas maintain full cutting effectiveness. This ensures productivity is preserved in regions where high material removal is beneficial, while precision is improved in regions requiring contour correction
3Manufacturing precision
If a finishing tool with variable effective width is used, then axial contour can be controlled precisely, but the tool design becomes more complex
Solution Approach 1:
Rather than designing a completely variable-width cutting surface, the invention uses discrete recesses at specific locations to achieve the desired axial contour. This localized approach achieves precision control with simpler design compared to continuously variable geometries
Solution Approach 2:
The cutting surface is divided into discrete segments with different effective widths separated by recesses. This segmentation allows independent optimization of each zone's cutting characteristics while simplifying the overall tool design and manufacturing process
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 allows for precise control over the axial contour of workpiece sections, enhancing surface finish and correcting long-wave defects, achieving a more consistent and accurate shape without the need for machine modifications, while maintaining high mechanical stability and efficient cooling.
Implementation Method 1
a granular cutting agent is pressed against the peripheral surface to be machined
Implementation Method 2
cooling medium supply openings which open into the recesses and through which a cooling medium can be supplied
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5C
AI summary
A finishing tool (300) for finish-machining a rotationally symmetric workpiece portion of a workpiece which rotates about a workpiece rotation axis during the finish-machining has a cutting means carrier (310) and a cutting layer (320) which is fastened to the cutting means carrier. The cutting layer has a cutting face (325) which is intended to be pressed flat against the workpiece portion during finish-machining. The cutting layer defines a longitudinal direction (L) to be oriented substantially parallel to the workpiece rotation axis and a transverse direction (Q) extending perpendicularly thereto. The cutting face (325) has a concave shape in the transverse direction. An effective width, measured in the transverse direction (Q), of the cutting face varies in the longitudinal direction (L) of the cutting face.