Rotary Cutting Tool Support Structure for Lightweight Stiffness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Heavy cutting tools pose handling difficulties and inefficiencies due to their weight, requiring automatic tool changers and potentially leading to poor machining quality due to high tilting moments, necessitating a reduction in weight while maintaining stiffness and functionality.
Innovation Solution
The use of topology optimization techniques combined with additive manufacturing (3D printing) to design a support structure for rotary cutting tools, resulting in a lightweight structure with improved structural performance and a high stiffness-to-weight ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional heavy cutting tools are used, then strength and stiffness are maintained, but weight increases causing handling difficulties and reduced productivity
Solution Approach 1:
The support structure is divided into multiple support members (first, second, third support members) extending in different directions from the central hub, with each member providing localized structural support. This segmentation allows weight reduction while maintaining overall structural integrity through distributed support architecture.
Solution Approach 2:
The support members extend in different axial and radial directions in three-dimensional space, creating a spatial framework that provides structural strength in multiple dimensions. This 3D arrangement allows the structure to achieve high stiffness-to-weight ratio by optimizing material distribution throughout the volume rather than adding mass uniformly.
2Ease of operation
If conventional heavy cutting tools are used, then structural stability is maintained, but handling ease and automation requirements worsen
Solution Approach 1:
Each support member has different physical dimensions and is positioned to provide localized support where needed. The first support member extends in a first direction, the second in a second direction, and the third in a third direction, with each member's geometry optimized for its specific structural role. This local optimization reduces overall weight while maintaining stability.
Solution Approach 2:
The support structure combines multiple support members with different geometries and orientations into an integrated lightweight framework. This composite structure achieves high stiffness-to-weight ratio by strategically distributing material where structural demands are highest, rather than using uniform heavy construction throughout.
3Productivity
If topology optimization and additive manufacturing are used, then weight is reduced and stiffness-to-weight ratio is improved, but manufacturing complexity increases
Solution Approach 1:
The support members are designed with predetermined geometric arrangements and physical dimensions using topology optimization techniques before manufacturing. The finite element analysis is performed in advance to determine the optimal configuration of each support member, allowing the additive manufacturing process to directly create the optimized structure without requiring post-manufacturing adjustments or assembly of multiple components.
Solution Approach 2:
The physical dimensions, orientations, and geometries of the support members are optimized by changing key design parameters through finite element analysis and topology optimization. This allows the structure to achieve maximum stiffness-to-weight ratio by precisely controlling parameters such as member thickness, length, and spatial arrangement, which are then directly manufactured using additive manufacturing technology.
Data Source
AI summary
A rotary cutting tool includes a support structure having a central hub located at an axially rearward end of the rotary cutting tool. A plurality of primary support members extends from the central hub in different axial and radial directions in three-dimensional space with respect to a central, rotational axis of the rotary cutting tool. The support structure may include one or more secondary support members extending from a primary support member in different axial and radial directions in three-dimensional space, and one or more tertiary support members to increase stiffness of the support structure. The central hub extends in a plane that is substantially perpendicular to the central, rotational axis of the rotary cutting tool. In one embodiment, each of the plurality of primary support members have a different physical dimension.