Round Milling Insert Indexing Without Screw Loss
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Solution Overview
Problem
Existing milling tools face challenges in securely mounting and indexing round cutting inserts, particularly with small diameter inserts, due to the risk of losing the screw when indexing, which limits versatility across different materials and milling operations.
Innovation Solution
A set of cutting inserts with conical relief surfaces and contact surfaces arranged at regular intervals allows for multiple indexing positions without removing the fastening screw, enabling secure mounting and adaptation to various materials on a single milling tool holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a through hole with screw is used to secure round cutting inserts, then the cutting insert can be mounted, but the screw may fall off and be lost during indexing
Solution Approach 1:
The invention divides the fastening function into two independent parts: a retention element that prevents loss and a clamping element that secures the insert. The retention element remains in the holder while the clamping element is removed during indexing, eliminating the risk of losing the fastening component.
Solution Approach 2:
The clamping element is extracted as a separate removable component from the retention element. This allows the clamping element to be taken out during indexing operations while the retention element stays in place to prevent loss, solving the problem of screw loss during indexing.
2Adaptability or versatility
If different types of cutting inserts are used for different materials and operations, then processing versatility is improved, but mounting security becomes difficult particularly with small diameter round inserts
Solution Approach 1:
The holder is designed with a universal retention element that works with all cutting insert types (round, square, different diameters). The retention element provides consistent mounting security across diverse insert geometries while allowing versatile tool applications.
Solution Approach 2:
The retention element is designed with specific local features (protrusions fitting into recesses) that provide secure mounting for small diameter round inserts while maintaining compatibility with larger and differently shaped inserts. The local geometric features ensure reliable retention regardless of insert type.
Data Source
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AI summary
A set of cutter inserts for milling applications is provided. The set has a plurality of differently shaped round cutter inserts, each of which has: a top surface (21), a bottom surface (22) and a lateral surface (23) which connects the top surface (21) and the bottom surface (22). A cutting edge (24) is formed at a cutting point between the top surface (21) and the lateral surface (23). A first section of the lateral surface (23), which borders the cutting edge (24), is formed as a clearance surface (26). A plurality of contact surfaces (27) are formed in the lateral surface (23) in order to contact corresponding pocket walls holding the insert in a milling tool holder, wherein the contact surfaces (27) are equally spaced so as to enable a 4n-times indexing with n E {1; 2}. The corresponding contact surfaces (27) of the various round cutter inserts in the set are arranged at corresponding positions and with corresponding orientations.