Asymmetric Double-Ended Grooving Insert With Self-Grip Retention
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Solution Overview
Problem
Existing double-ended grooving and parting cutting inserts lack an efficient self-grip mechanism for secure retention in insert holders without additional elements like screws, and they often require insertion keys for proper alignment and seating.
Innovation Solution
A double-ended cutting insert with rotationally asymmetric design features, including converging engagement grooves on both rake and support face surfaces, which facilitate a self-grip mechanism when seated in an insert holder, eliminating the need for additional retention elements and insertion keys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional double-ended cutting inserts are designed with two cutting portions, then cutting versatility is improved, but secure retention without additional retention elements becomes difficult to achieve
Solution Approach 1:
The cutting insert employs rotational asymmetry by providing different engagement groove configurations on opposite ends. The first end has engagement grooves converging at a first angle while the second end has engagement grooves converging at a second angle, creating a unique geometric signature that enables secure self-grip retention while maintaining double-ended cutting capability
2Device complexity
If conventional cutting inserts use self-grip configuration, then device complexity is reduced, but reliable retention of double-ended inserts is compromised
Solution Approach 1:
The engagement grooves are configured with different local geometries at opposite ends of the insert. Each end has grooves with specific convergence angles tailored to that end's requirements, creating locally optimized retention characteristics that collectively provide reliable overall retention without additional elements
3Manufacturing precision
If conventional inserts require insertion keys for alignment, then manufacturing precision is improved, but ease of operation deteriorates
Solution Approach 1:
The converging engagement grooves are positioned and angled to automatically guide and align the insert during insertion. The geometric configuration of the grooves creates self-aligning features that direct the insert into the correct orientation without requiring external insertion keys or tools
Data Source
AI summary
A double-ended parting cutting insert. The cutting insert includes two cutting portions at opposite ends thereof which are oriented at 90° to each other. The cutting insert includes a pair of rake and support engagement grooves, the rake and support engagement grooves of each one of the pair converging in a direction away from a respective cutting portion. An insert holder includes a clamping portion having a resilient upper clamping jaw having an upper engagement ridge and a lower base jaw having a lower engagement ridge. A gap therebetween forms an insert receiving slot that has a slot opening. The upper and lower engagement ridges converge in a direction away from the slot opening. When the cutting insert is releasably attached to the insert holder, to constitute a fastened position of a cutting tool, the cutting insert is located in the insert receiving slot and resiliently clamped therein.