Turret Parting Tool Holder Layout for Deep Grooving Stability
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Solution Overview
Problem
Existing CNC-lathes with indexable turrets are limited in grooving depth and prone to vibrations, with tools extending beyond necessary limits, increasing collision risks.
Innovation Solution
A tool holder and parting and grooving tool design for indexable turrets with a mounting portion and projected portion, allowing for greater grooving depth and reduced vibrations, featuring a cutting edge spaced apart from the interface plane to minimize collisions and enhance tool life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the tool is designed to reach greater grooving depth, then the grooving depth capability is improved, but the tool extends further from the turret axis increasing collision risk
Solution Approach 1:
The tool holder utilizes the radial dimension by positioning the tool in an adjacent tool station rather than extending axially from the current station. This dimensional shift allows the cutting edge to reach greater grooving depths while keeping the tool holder compact and positioned away from the workpiece rotation path, thereby reducing collision risk.
2Length of moving object
If the tool is designed to reach greater grooving depth, then the grooving depth capability is improved, but vibrations during cutting increase
Solution Approach 1:
By positioning the tool in an adjacent tool station radially outward from the turret axis, the tool holder creates a more favorable stiffness configuration. The tool support structure can be optimized for radial stiffness rather than axial stiffness, significantly reducing vibrations during deep grooving operations.
Solution Approach 2:
The tool holder design incorporates counterbalancing features where the projected portion and mounting portion are configured to distribute masses in a way that reduces dynamic imbalance and vibration during cutting operations at greater depths.
3Weight of moving object
If the tool holder is made smaller and lighter, then collision risk is reduced, but the structural strength may be compromised
Solution Approach 1:
The tool holder employs local quality optimization by concentrating material and structural reinforcement only in critical areas such as the recess for holding the parting and grooving tool and the interface regions, while minimizing material in non-critical areas. This achieves both reduced weight and maintained structural strength.
Solution Approach 2:
The tool holder may utilize composite material structures or material composites that provide high strength-to-weight ratio, enabling a smaller and lighter design while maintaining the necessary structural strength for deep grooving operations.
Data Source
AI summary
A tool holder and a parting and grooving tool for an indexable turret have a plurality of tool stations, The adjacent tool stations have a predetermined angular spacing. The tool holder includes a mounting portion and a projected portion, which are connected. The mounting portion has a flat surface extending in an interface plane and the projected portion has a recess for holding the parting and grooving tool. The parting and grooving tool includes a cutting portion and a clamping portion. The cutting portion includes a cutting edge and the clamping portion includes a rear end surface. The parting and grooving tool is mountable in the recess such that a distance from the interface plane to the rear end surface of the parting and grooving tool is greater than a distance from the interface plane to the cutting portion of the parting and grooving tool.