Tool Body Insert Seat Contact Geometry for Stable Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cutting inserts with cutting edges on both surfaces are difficult to stabilize due to the challenge of achieving a highly accurate flat seating surface, leading to unstable contact with the insert seat, which can result in abnormal damage or reduced machining accuracy.
Innovation Solution
A tool body with an insert seat featuring a base surface and intersecting side wall surface, where the contact surface is flat and the contact edge is linear or pointed, allowing for stable contact with the cutting insert's seating surface, either through surface or line contact, to prevent tilting and enhance support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a seating surface is formed to be depressed inward with respect to a cutting edge to increase usable cutting edges, then the number of usable cutting edges increases, but the seating surface cannot be provided as a highly accurate flat surface
Solution Approach 1:
The base surface is segmented into multiple functional areas: a contact surface with a first contact part for wide-area contact, and a contact projected part with a second contact part for additional support. This segmentation allows the seating surface to provide stable support without requiring high flatness, resolving the contradiction between reusability and manufacturing precision.
Solution Approach 2:
Different parts of the base surface are given different functions: the contact surface provides wide-area contact for stability, while the contact projected part provides localized support points. This local differentiation allows the seating surface to achieve stable holding without requiring uniform high precision across the entire surface.
2Manufacturing precision
If a highly accurate flat base surface is provided in the insert seat, then contact accuracy improves, but stable holding becomes difficult when the seating surface cannot be highly accurate
Solution Approach 1:
The contact mechanism is designed to adapt to variations in seating surface flatness. The combination of a flat contact surface and a projected contact part creates a dynamic contact system that automatically adjusts to the actual seating surface geometry, ensuring stable holding regardless of seating surface precision.
Solution Approach 2:
The base surface design changes the contact parameters from a single flat surface to a composite structure with both surface contact and line/point contact. This parameter change allows the system to tolerate variations in seating surface flatness while maintaining stable holding.
3Reliability
If wide-area contact is required for stable holding, then contact stability improves, but this becomes difficult to achieve when the seating surface is not highly accurate
Solution Approach 1:
The invention merges two types of contact: wide-area surface contact through the contact surface and localized line/point contact through the contact projected part. This combination achieves stable holding by compensating for seating surface inaccuracies, allowing wide-area contact stability without requiring high seating surface precision.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A tool body having an insert seat and a cutting tool which allow a cutting insert to be stably held are provided. A tool body according to the present invention is a tool body having an insert seat for mounting a cutting insert on the tool body, wherein the insert seat has a base surface and a side wall surface which extends so as to intersect with the base surface. The base surface has a contact surface and a contact projected part which come into contact with the cutting insert. A contact part of the contact surface is comprised of a surface, and a contact part of the contact projected part has a linear shape or a point shape.