Toolholder With Elongated Seating Pads For On-Edge Inserts

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Solution Overview

Problem

Existing toolholders for on-edge cutting inserts in metalworking operations sacrifice seating surface length for clearance, leading to inadequate support for the inserts during machining.

Innovation Solution

A toolholder design with a pocket featuring primary deep and shallow relief areas and support pads that accommodate the angularly offset segments of on-edge cutting inserts, maximizing support pad length while providing necessary clearance for corner corners, ensuring secure mounting and reduced risk of premature tool failure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the pocket is formed to provide clearance for corners of on-edge cutting inserts with angularly shifted cutting edges, then the cutting insert can be accommodated, but the seating surfaces in the pocket are shortened, providing less support to the cutting insert

Engineering Contradiction:

Improveclearance for offset cornersVSAvoidseating surface length

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The invention transitions from a conventional single-plane seating surface to a multi-level seating arrangement with deep and shallow relief areas at different depths. This dimensional change allows the pocket to accommodate offset corners while maintaining extended seating surface length through the deep relief area that reaches the full depth of the insert.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The seating surface is segmented into multiple functional zones: deep relief areas for corner accommodation, shallow relief areas for segment support, and extended support pads for primary seating. This segmentation allows each zone to perform its specific function independently, resolving the conflict between clearance and support length.

Inventive Principle:

Principle #1Segmentation

2Stability of the object's composition

If the seating surfaces are extended to provide maximum support for the cutting insert, then the insert stability is improved, but clearance for the offset corners is compromised

Engineering Contradiction:

Improveinsert stabilityVSAvoidclearance for offset corners

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

Different regions of the pocket are given different depths and functions: deep relief areas provide clearance for corners while shallow relief areas provide support surfaces. This local differentiation allows the pocket to simultaneously achieve both corner clearance and maximum seating surface length for insert stability.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS8454277B2Toolholder and toolholder assembly with elongated seating pads

Publication Date: 2013.06.04 KENNAMETAL INC

AI summary

A toolholder assembly has a pocket adapted to receive a double-sided on-edge cutting insert with wiper facets. A pocket has at least two sides and supports pads extending from each of the at least two sides, wherein the support pads contact the wiper facets of the cutting insert when the cutting insert is mounted within the pocket.