Self-Regulating Honing Tool With Radial Dampers
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Solution Overview
Problem
Conventional honing tools face challenges in controlling dimensional increase and maintaining accurate on-center honing, especially with portable equipment, due to uncontrolled spring bias and limited precision in enlarging bore diameters.
Innovation Solution
A honing tool with a cylindrical body featuring axially and radially extending webs with curved blades coated with abrasive material, equipped with a resilient damper and vanes to limit radial translation, allowing for self-limiting and self-controlling bore enlargement, and a tandem honing device for maintaining accurate on-axis honing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional honing tools with adjustable radial force controlled by foot pedal are used, then metal removal capability is maintained, but dimensional control of bore diameter becomes difficult and overhoning occurs
Solution Approach 1:
The honing tool automatically controls its own radial force through the spring mechanism. The spring applies a constant radial force to the hones without requiring operator intervention or foot pedal control, enabling self-regulating dimensional control of the bore diameter during honing operations
Solution Approach 2:
The patent changes the control parameter from operator-controlled foot pedal to a mechanical spring mechanism with predetermined force characteristics. This parameter change transforms the system from manual adjustment to automatic parameter control, ensuring consistent dimensional accuracy
2Ease of operation
If portable or hand held honing equipment is used, then ease of operation is improved, but maintaining true on-center honing becomes difficult
Solution Approach 1:
The honing tool is divided into multiple independent hones mounted on a common shaft. Each hone operates independently with its own spring mechanism, allowing the tool to maintain on-center positioning even when used portably or handheld, as each segment can self-correct positioning deviations
3Device complexity
If spring bias of honing tool stones is not controlled, then tool simplicity is maintained, but uncontrolled radial force causes dimensional increase beyond limits
Solution Approach 1:
The patent transforms the uncontrolled spring bias parameter into a controlled, predetermined parameter by using springs with specific force characteristics. This allows the tool to maintain simplicity while achieving precise dimensional control through carefully selected spring properties rather than complex control mechanisms
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 ensures precise control over bore diameter enlargement, reducing the risk of overhoning and achieving accurate, on-axis honing by limiting radial travel and using a pair of axially spaced honing tools for enhanced precision.
Implementation Method 1
A resilient damper is disposed behind each of the curved blades in an axial passageway in the body of the device
Implementation Method 2
A portion of the external surface of each blade remote from the attachment points includes an abrasive coating
Data Source
AI summary
A honing tool or device having a generally cylindrical body includes a plurality of axially extending webs to which are attached a like plurality of curved honing blades. A portion of the external surface of each blade remote from the attachment point includes an abrasive coating. The radius of curvature of the portion of the blades including the abrasive coating is nominally the same as the radius of the desired finish diameter of the bore. Resilient dampers are disposed behind the blades in the body to dampen vibrations. An additional plurality of webs may be disposed behind the blades to limit their inward translation. A double or tandem honing device includes a pair of the just described honing tools which are arranged in axially spaced apart relationship on a common shaft.