Milling Tool Cassette With Deflectable Arm For Axial Adjustment

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Solution Overview

Problem

Milling tools lack precise axial adjustability of finishing cutting inserts, which affects surface quality, and existing solutions are not user-friendly or reliable in terms of power transmission and component replacement.

Innovation Solution

The design incorporates a cassette system with a deflectable arm for precise axial adjustment of cutting inserts, allowing for easy replacement of wear-prone components and secure fixation, featuring a conical adjustment screw and separate adjustment elements for fine tuning, ensuring reliable power transmission and minimal susceptibility to user errors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a cassette system with deflectable arm is used for axial adjustment, then axial adjustability and surface quality are improved, but device complexity increases

Engineering Contradiction:
Improveaxial position precision of cutting insertVSAvoidstructure complexity of cassette system
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The cassette incorporates a deflectable arm that can be dynamically adjusted to different axial positions using an adjustment screw mechanism. This allows the cutting insert to be positioned precisely in the axial direction while maintaining the ability to adapt to different machining requirements, resolving the contradiction between precision and rigidity.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The cassette system is segmented into distinct functional components: the cartridge body, the deflectable arm, the adjustment screw, and the cutting insert. This segmentation allows each component to be optimized independently - the deflectable arm for adjustment, the screw for precision control, and the insert for cutting - thereby achieving high precision without excessive overall complexity.

Inventive Principle:
Principle #1Segmentation

2Ease of repair

If cutting inserts are made exchangeable in cartridges, then ease of replacement and maintenance are improved, but reliability of power transmission may worsen

Engineering Contradiction:
Improveease of replacement of cutting insertVSAvoidpower transmission reliability
Core Design Contradiction:
Ease of repairVSReliability

Solution Approach 1:

The cartridge design incorporates self-aligning features where the cutting insert automatically positions itself correctly within the cartridge upon insertion. The cartridge body includes guiding surfaces and positioning elements that ensure proper alignment without requiring complex external alignment tools or procedures, thus maintaining ease of replacement while ensuring reliable power transmission through consistent alignment.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The cartridge integrates multiple functions into a single component: it serves as the holder for the cutting insert, the interface with the base body, and the mechanism for power transmission. By merging these functions, the design simplifies the replacement process (entire cartridge changes) while maintaining reliable power transmission through the integrated structure that ensures consistent alignment and force transfer.

Inventive Principle:
Principle #5Merging (Combining)

3Manufacturing precision

If axial adjustability is provided for finishing cutters, then surface quality is improved, but susceptibility to operating errors may increase

Engineering Contradiction:
Improvesurface quality of workpieceVSAvoidsusceptibility to user errors
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The adjustment mechanism includes visual and tactile feedback features that guide the operator to the correct axial position. The adjustment screw provides controlled, incremental movement that can be precisely felt and seen, reducing the likelihood of over-adjustment or incorrect positioning. This feedback mechanism allows operators to achieve the required precision for surface quality while minimizing operating errors.

Inventive Principle:
Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution enables precise axial adjustment of cutting inserts, extending tool life, improving surface quality, and simplifying maintenance by allowing easy replacement of wear-prone components while ensuring secure and reliable fixation and power transmission.

Implementation Method 1

The deflectable arm can preferably be designed to be elastically deflectable

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP2753445B1Milling tool
Publication Date: 2015.11.18 CERATIZIT AUSTRIA GES
  • EP2753445B1 patent drawingFigure 1~2
  • EP2753445B1 patent drawingFigure 3~4
  • EP2753445B1 patent drawingFigure 5~6

AI summary

The invention relates to a milling tool, comprising: a main part that has a predetermined rotational axis (R) and at least one recess for receiving an interchangeable first cutting insert (10) such that the lower face of the first cutting insert (10) rests directly against the main part and a cutting edge (40) of the cutting insert projects past the main part in the axial direction (Z); a first cartridge (6) that is removably fixed in the recess for fixing at least two lateral surfaces of the first cutting insert (10); an adjusting mechanism (26, 24, 22) for adjusting the position of the first cutting insert (10) in the axial direction (Z); and a clamping device (42) for fixing the first cutting insert (10) in the recess. The adjusting mechanism (26, 24, 22) includes an articulated arm (22) of the first cartridge (6), said arm being designed as a counter bearing for at least one lateral surface of the first cutting insert (10).