Honing Tool for Conical Bore Recesses
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Solution Overview
Problem
Existing honing methods struggle to efficiently widen cylinder bores with recesses, as short honing stones tend to cant when traversing these recesses, leading to interrupted cuts and reduced stock removal rates.
Innovation Solution
A honing tool with multiple honing stones arranged on a common shell, covering a wide angle range, prevents canting by bridging the recess and allows for high stock removal rates, even in tight spaces, with guide bars and feed ramps ensuring precise centering and conical widening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If short honing stones are used to widen cylinder bores with recesses, then the tool can reach tight spaces, but the stones tend to cant when traversing recesses leading to interrupted cuts and reduced productivity
Solution Approach 1:
Multiple honing stones are combined and arranged adjacently on a common shell to form a unified cutting structure. This merging approach ensures that the stones work together as a single unit, preventing individual stones from canting when traversing recesses, while maintaining the short length needed for tight spaces.
Solution Approach 2:
The honing tool is segmented into multiple discrete stones arranged on a shell, allowing each stone to contribute to the widening process while the collective arrangement prevents canting. The segmentation enables the tool to maintain short individual stone lengths while achieving stable operation through the group configuration.
2Productivity
If multiple honing stones are arranged on a common shell to prevent canting, then productivity increases, but device complexity increases
Solution Approach 1:
The common shell serves multiple functions: it supports and positions multiple honing stones, provides structural rigidity to prevent canting, and enables the tool to widen bores with recesses. This multi-functionality reduces the need for additional complex components while achieving the productivity goal.
3Reliability
If honing stones are arranged to cover a wide angle range, then they can bridge recesses effectively, but the tool requires more space for idle travel
Solution Approach 1:
The honing stones are arranged dynamically around the shell to cover a wide angle range, allowing the tool to adapt to the bore geometry and bridge recesses effectively. The angular distribution of stones optimizes the cutting action while minimizing the axial length required for idle travel.
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
The tool enables reliable, high-efficiency conical honing of cylinder bores with recesses, maintaining high stock removal rates and achieving precise geometry, suitable for mass production, while minimizing tool length and idle travel.
Implementation Method 1
A honing tool (31) comprises a tool body (33) and several honing stones (37). The honing stones are arranged on a common shell... enabling high-efficiency conical honing of cylinder bores with recesses
Data Source
AI summary
A honing tool has a tool body and shells disposed on the tool body. Honing stone sets each provided with two or more honing stones are provided. The shells each support one of the honing stone sets. Guide bars of the honing tool are placed against the bore and a portion of the bore is conically honed with decreasing stroke of the honing tool, wherein a lower reversing point of the honing tool remains substantially unchanged. Honing is terminated as soon as an upper reversing point has reached a predetermined terminal value. Alternatively, a portion of the bore is conically honed with a constant stroke of the honing tool, wherein reversing points of the stroke of the honing tool remain substantially unchanged and a feeding force pressing the honing stones against the bore is controlled as a function of a position of the honing tool in the bore.