Honing Tool Interstice Filling for Wear Resistance
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Solution Overview
Problem
Honing tools experience uneven wear, particularly when honing blind or stepped holes, leading to misshaped workpieces and high tool consumption, especially when working with hard or tough materials, resulting in increased costs and reduced cylindricality.
Innovation Solution
A honing tool with a radially expandable tubular member featuring a first layer of abrasive particles of a specific size and a second layer of smaller abrasive particles located within the interstices of the first layer, providing enhanced wear resistance and maintaining a uniform cylindrical profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single layer of abrasive particles is used on the honing tool, then the tool structure is simple, but the wear resistance is insufficient and the tool profile changes unevenly
Solution Approach 1:
The abrasive layer is divided into multiple distinct layers with different particle sizes. The first layer contains larger abrasive particles while the second layer contains smaller abrasive particles, creating segmented functional zones that address different wear patterns at different locations on the tool.
Solution Approach 2:
Different regions of the honing tool are given different abrasive layer compositions. The endmost portion has a second layer of smaller particles to prevent excessive wear, while other portions have only the first layer, creating localized quality variations that optimize overall tool performance.
2Adaptability or versatility
If the honing tool is used for honing blind holes, then the tool can access closed or stepped ends, but uneven wear occurs particularly at the endmost portion
Solution Approach 1:
The endmost portion of the honing tool is specifically designed with a second layer of smaller abrasive particles to counteract the excessive wear that occurs when honing blind holes. This localized modification ensures uniform wear across the entire tool length while maintaining the capability to access and hone closed or stepped ends.
3Power
If larger abrasive particles are used, then the tool has higher cutting capability, but the tool wears faster and loses its profile shape
Solution Approach 1:
The abrasive layer is segmented into two distinct particle size populations. The first layer provides the necessary cutting capability with larger particles, while the second layer with smaller particles provides wear resistance and maintains tool profile, creating a balanced functional distribution.
Solution Approach 2:
The honing tool employs a composite abrasive layer structure combining two different abrasive particle sizes in a layered configuration. This composite approach allows the tool to simultaneously achieve high cutting capability from the larger particles and extended service life from the smaller particles in the second layer.
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 achieves uniform wear resistance along its length, reducing tool consumption and maintaining precise cylindricality over a large number of workpieces, while minimizing costs by preventing overstroking and maintaining the tool's original shape.
Implementation Method 1
a second layer of abrasive particles bonded thereto. Substantially all of the abrasive particles of the second layer are of a second size which is equal to about one-half the first size or less, and the particles of the second layer are located at least substantially within interstices or voids between the particles of the first layer
Implementation Method 2
Honing generally involves moving a honing tool reciprocatingly through a hole or bore of a workpiece, with an outer abrasive surface of the tool in abrading contact with the surface defining the hole or bore
Data Source
AI summary
A honing tool for honing holes in workpieces, having an abrasive portion including a first abrasive layer therearound of abrasive particles of a first size, including a region having a second abrasive layer of abrasive layers of a second size sufficiently smaller than the first size, so as to be disposed in interstices between abrasive particles of the first abrasive layer without altering the diametrical size of the first layer, and so as to provide enhanced wear resistance.