Cutting Insert Mounting Hole with Offset Contact Points
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Solution Overview
Problem
Existing cutting tools with replaceable inserts face challenges in consistent and stable mounting, leading to potential damage of workpieces due to imprecise positioning and movement of inserts relative to toolholders.
Innovation Solution
The cutting insert features a mounting hole with a contact region having two contact points disposed at a lesser distance from the central axis than the region between them, providing enhanced stability and indexing by distributing the clamping force across multiple points, preventing rotation and pivoting, and facilitating precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional single-point contact mounting is used, then the structure is simple, but the mounting stability and positioning precision are insufficient
Solution Approach 1:
The contact surface is segmented into multiple discrete contact points instead of a single contact area. The mounting hole contains multiple contact points (at least three) distributed on its surface, each providing independent support and constraint. This segmentation increases mounting stability by distributing clamping forces across multiple points while maintaining a relatively simple overall structure.
Solution Approach 2:
The contact points are arranged in a three-dimensional configuration within the mounting hole rather than on a single plane. At least one contact point is offset from the central axis of the mounting hole, creating a spatial distribution that prevents rotation and pivoting of the insert. This dimensional arrangement enhances positioning precision and mounting stability without significantly increasing structural complexity.
2Manufacturing precision
If multiple contact points are used in the mounting hole, then the positioning precision and anti-rotation capability improve, but the manufacturing complexity increases
Solution Approach 1:
Different regions of the mounting hole have different functional qualities. The contact points are strategically positioned at specific locations within the mounting hole, with at least one contact point offset from the central axis. This local differentiation provides precise positioning and anti-rotation capability where needed, while maintaining simplicity in other areas of the insert structure.
Solution Approach 2:
The contact points are arranged asymmetrically within the mounting hole, with at least one contact point positioned at an offset from the central axis. This asymmetric arrangement creates inherent anti-rotation characteristics and precise positioning without requiring additional symmetric features or complex manufacturing processes. The asymmetric configuration naturally prevents pivoting and rotation of the insert during cutting operations.
Data Source
AI summary
The present invention relates to cutting tools with cutting inserts and, more particularly, to cutting tools with cutting inserts that have mounting recesses. The cutting insert includes a body having a mounting hole having an axis extending therethrough, and a surface portion in the mounting hole. The surface portion is substantially circular when viewed in a direction of the axis and is non-parallel to the axis and including at least two contact points disposed at a lesser distance from the axis than a region between the at least two contact points. A cutting tool is also disclosed.