Honing Tool Pilot Cap Double-Angle Transition Surface
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Solution Overview
Problem
Honing tools face issues with the pilot cap disengaging from the workpiece inner bore before the stones engage, leading to tool failure and damage, due to insufficient centering and contact with unintended areas, resulting in chipped stones and poor surface finishing.
Innovation Solution
A head assembly for honing tools featuring a pilot cap with a double-angle transition surface and extended wear pads to ensure continuous engagement and centering, preventing disengagement and stone chipping, and enhancing the effective length of the pilot cap for stable machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the pilot cap is made shorter to reduce complexity, then the device complexity is reduced, but the pilot cap disengages from the workpiece inner bore before the stones engage
Solution Approach 1:
The patent applies dimensionality change by modifying the transition surface geometry from a simple single-angle design to a complex multi-angle configuration. The transition surface includes a first portion at a first angle and a second portion at a second angle, creating a stepped geometric profile that extends the effective engagement length without increasing the overall axial length of the pilot cap, thus resolving the contradiction between compact structure and reliable engagement.
Solution Approach 2:
The patent changes geometric parameters of the transition surface, specifically the angles and lengths of different portions. By optimizing the first angle and second angle of the transition surface, and adjusting the relative lengths of the first and second portions, the design achieves extended effective engagement length while maintaining a compact overall structure, thereby improving engagement reliability without proportionally increasing device complexity.
2Reliability
If the pilot cap engagement length is increased to prevent disengagement, then the engagement reliability is improved, but the device complexity and effective length increase
Solution Approach 1:
The patent resolves the length contradiction by utilizing geometric dimensionality change. The multi-angle transition surface creates an extended effective engagement path through angular deviations rather than simple axial extension. This allows the pilot cap to achieve longer effective engagement length (preventing disengagement) while maintaining a compact axial footprint, thus avoiding proportional increases in overall device length.
3Length of moving object
If the transition surface angle is made steeper to reduce the effective length, then the device length is reduced, but the centering precision and smooth engagement are compromised
Solution Approach 1:
The patent achieves compact length while maintaining centering precision through geometric dimensionality change. The multi-angle transition surface uses angular deviations to extend the effective centering path length without increasing the axial footprint. This stepped geometric profile allows gradual centering action over a longer effective path, maintaining manufacturing precision while keeping the overall device length short.
Solution Approach 2:
The patent optimizes the angular parameters of the transition surface to balance length and precision. By carefully selecting the first angle and second angle, and their relative proportions, the design achieves an optimal compromise where the effective engagement length is sufficient for precise centering, while the axial projection remains compact, thus resolving the contradiction between length and precision.
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 double-angle transition surface and wear pads effectively prevent pilot cap disengagement, ensuring precise centering and smooth engagement with the workpiece, reducing stone chipping and tool failure, and improving surface finish quality.
Implementation Method 1
Honing is a machining process that utilizes an abrasive element (stones) including a large number of abrasive particles to remove material from a surface of a workpiece
Implementation Method 2
The head assembly has at least one wear pad disposed on an outer surface of the sidewall
Data Source
AI summary
A head assembly of a honing tool includes a carrier having a proximal end connectable to a spindle, a distal end, and a plurality of stones. The head assembly also includes a pilot cap connected to the distal end, and defining an end face and a sidewall. A transition surface defined by the pilot cap extends between the end face and the sidewall. The transition surface extends at a first angle forming a first angled relief and then at a second angle forming a second angled relief.