Cutting Insert Fixing Member With Curved Pressing Surface
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting tools face instability in fixing cutting inserts due to flat surfaces in the fixing member, leading to potential wear and deformation from concentrated loads.
Innovation Solution
A fixing member with a bulging portion having an outer shape curved in an arc shape in a cross-sectional view, which is formed along the width direction of the fixing member body, is used to press and fix the cutting insert, providing a stable and even distribution of load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a flat surface is used to press the cutting insert, then the structure is simple, but the contact position is unstable and the fixed state becomes unstable when inclination occurs
Solution Approach 1:
The pressing portion is designed with a curved surface having a specific radius of curvature (5mm to 100mm) instead of a flat surface. This curved surface maintains stable contact with the cutting insert even when the fixing member is inclined, preventing contact position instability while keeping the overall structure relatively simple.
2Reliability
If hemispherical protrusions are used to press the cutting insert, then the cutting insert can be stably pressed, but load concentrates at the contact point causing wear and deformation
Solution Approach 1:
Instead of using highly curved hemispherical protrusions that concentrate load at a point, the pressing portion uses a curved surface with a larger radius of curvature (5mm to 100mm). This distributes the pressing load over a broader contact area while still maintaining stable contact, thereby preventing both contact instability and excessive load concentration.
Solution Approach 2:
The radius of curvature of the pressing portion is specifically controlled within the range of 5mm to 100mm. This parameter optimization balances two requirements: enough curvature to maintain stable contact under inclination, but not so much curvature that it concentrates load like hemispherical protrusions. The specific radius value directly controls the contact area and load distribution.
3Reliability
If a curved surface with small radius of curvature is used, then contact stability improves, but load concentration increases causing wear and deformation
Solution Approach 1:
The radius of curvature is optimized within the specific range of 5mm to 100mm. A radius smaller than 5mm would concentrate load excessively, while a radius larger than 100mm would reduce contact stability under inclination. This parameter range finds the optimal balance between contact stability and load distribution, preventing both contact instability and cutting insert damage.
Data Source
AI summary
Provided are a fixing member and a cutting tool capable of pressing and fixing a cutting insert to a tool body in a stable state without defects such as wear and deformation.A fixing member pressing and fixing a cutting insert disposed on an insert mounting part of a tool body includes a fixing member body configured to be fastened to a fixing member mounting part of the tool body and a pressing portion that is provided to the fixing member body and configured to press the cutting insert when the fixing member body is fastened to the tool body, wherein in the pressing portion, a bulging portion having an outer shape, in which a cross-sectional view in a direction orthogonal to a width direction of the fixing member body is curved in an arc shape, is formed along the width direction of the fixing member body.