Cutting Tool Holder With Cavity For Chatter Vibration Control
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Solution Overview
Problem
Cutting tools with enhanced rigidity to prevent warping often compromise chip discharge performance due to reduced pocket space, and existing solutions fail to effectively restrain chatter vibration while maintaining high rigidity.
Innovation Solution
A cutting tool holder design featuring a body part with a first member, a second member, and a third member, where the second member includes a cavity to reduce rigidity degradation and facilitate twisting, thereby reducing chatter vibration and maintaining good chip discharge performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rigidity of the holder is enhanced by making it difficult for the holder to be warped by disposing an upper wall part, then the holder rigidity is improved, but the pocket space becomes narrow and chip discharge performance deteriorates
Solution Approach 1:
The invention transitions from a two-dimensional upper wall structure to a three-dimensional hollow cylindrical structure with radial thickness variation. The variable thickness design (thicker at top, thinner at bottom) creates a spatial distribution of rigidity that prevents warping while preserving pocket volume for chip discharge.
Solution Approach 2:
The holder employs non-uniform thickness distribution in the hollow cylindrical structure, with the radial thickness being greater at the top surface and smaller at the bottom surface. This local quality variation provides enhanced rigidity where needed (top) while maintaining pocket space where required (bottom region).
2Reliability
If the holder rigidity is enhanced to restrain chatter vibration, then the cutting stability is improved, but the pocket space is reduced and chip discharge performance deteriorates
Solution Approach 1:
The invention uses a hollow cylindrical structure with variable radial thickness instead of a solid or simple walled structure. This dimensional approach allows the holder to achieve high rigidity for chatter vibration restraint while maintaining adequate pocket space for effective chip discharge.
Solution Approach 2:
The variable thickness design concentrates material where rigidity is most needed (top surface with greater radial thickness) to restrain chatter vibration, while reducing material in the pocket region to maintain chip discharge performance. This local optimization resolves the contradiction between cutting stability and productivity.
Data Source
AI summary
In one embodiment, a holder includes a body part elongated from a first end part to a second end part along a rotation axis. The body part includes a first member, a second member, and a third member. The first member is located on a side of the first end part, and includes a pocket to receive a cutting insert. The second member is located closer to the second end part than the first member, and includes at least one cavity inside the second member. The third member is located closer to the second end part than the second member.