Throw-away Burnishing Tool Tip Posture Stability
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Solution Overview
Problem
Conventional throw-away burnishing tools for hardened steel and stainless steel surfaces face issues with maintaining tip posture under varying pressing forces, leading to non-linear displacement and urging force relationships, making accurate adjustment difficult.
Innovation Solution
A throw-away burnishing tool design featuring a tool holder with an I-shaped portion and protrusion, a hard material tip detachably attached to a tip holder, and an urging mechanism with an adjustment mechanism to maintain tip posture and adjust urging force linearly, using diamond or CBN tips for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an urging method by elastic deformation of the connecting portion is employed, then the tip holder can be fixed to the tool holder, but the tip posture changes when pressing force magnitude changes
Solution Approach 1:
The connecting portion is divided into a fixed portion and a movable portion, allowing the tip holder to be segmented into sections that can move independently. This enables the tip posture to remain stable while still allowing controlled movement for pressing force adjustment.
Solution Approach 2:
The connecting portion transitions from a purely elastic deformation system to a dynamic system with a movable portion that can be adjusted. This allows the system to adapt to changing pressing forces while maintaining tip posture stability during machining.
2Device complexity
If elastic deformation of the connecting portion is used to urge the tip holder, then the structure is simple, but the relationship between displacement and urging force is non-linear
Solution Approach 1:
A movable portion is introduced as an intermediary between the elastic deformation mechanism and the tip holder. This intermediary component provides a reference axis that linearizes the relationship between displacement and urging force, improving adjustment precision without significantly increasing overall system complexity.
3Strength
If the tip holder is pressed against the shoulders of the attachment seat, then the tip holder is fixed securely, but the pressing force cannot be adjusted during machining
Solution Approach 1:
The connecting portion is designed with both fixed and movable sections, allowing the system to transition from a static fixed state to a dynamic adjustable state. The movable portion can be shifted along the reference axis to adjust pressing force magnitude while the fixed portion maintains secure attachment.
Solution Approach 2:
The system allows changing the pressing force parameter by moving the movable portion to different positions along the reference axis. This enables adjustment of the urging force while maintaining the fundamental fixed-attachment structure.
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 solution ensures consistent tip posture and accurate urging force adjustment, enabling efficient machining of hardened steel and stainless steel surfaces with improved surface finish and reduced machining time.
Implementation Method 1
a parallel pin supported at both ends by the tool holder and passing through the oblong aperture, wherein the parallel pin guides a movement of the holder pin along the oblong aperture
Implementation Method 2
an urging means internally inserted into the holder pin and urging the holder pin
Implementation Method 3
when a pressing force which the diamond tip 37 imparts to a workpiece is changed in magnitude
Implementation Method 4
for burnishing the surface of hardened steel having a hardness of HRC 40 or more and when burnishing the surface of a stainless steel material, burnishing tools using diamond in place of rollers are known
Data Source
AI summary
A throw-away burnishing tool for an outside diameter includes: a tool holder having a rectilinear I-shaped portion and a protrusion portion; a hard material tip detachably attached to a tip holder; a holder pin connected to the tip holder and accommodated in the protrusion portion of the tool holder, the holder pin having an oblong aperture in the form of a through-hole extending in a direction substantially perpendicular to an axis of the holder pin; an urging means internally inserted into the holder pin and urging the holder pin; an urging force adjustment means for adjusting an urging force generated by the urging means; and a parallel pin supported at both ends by the tool holder and passing through the oblong aperture, wherein the parallel pin guides a movement of the holder pin along the oblong aperture.