Spherical-Head Cutting Tool Fastener for Pivoting Coolant Delivery
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Solution Overview
Problem
Current clamping mechanisms in turning tools compromise on clamping force, tool life, and fluid conveyance due to elastic deformation and complex angular displacement, limiting rotational freedom and fluid delivery efficiency.
Innovation Solution
A fastener with a spherical engagement between the clamp and tool body, allowing angular and pivotal displacement while maintaining fluid pressure and minimizing leakage, using a fastener with a spherical head abutment surface and internal fluid channel for high-pressure fluid conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If elastic deformation is used to enable pivotal displacement between clamp and tool body, then rotational freedom and insert coupling are improved, but clamping force decreases and plastic deformation accelerates wear
Solution Approach 1:
The patent replaces the elastic neck with a spherical head abutment surface that engages with a corresponding spherical seating surface in the clamp. This spherical interface enables pivotal displacement and rotational freedom through geometric curvature rather than material elasticity, maintaining clamping force while achieving the required adaptability.
2Strength
If rigid clamp arrangement is used to maintain clamping force, then tool life is improved, but pivotal displacement and rotational freedom are limited
Solution Approach 1:
The spherical head abutment surface on the fastener engages with a spherical seating surface in the rigid clamp, creating a ball-and-socket joint that allows pivotal displacement and rotational freedom while maintaining the rigidity of the clamp structure and preserving clamping force.
3Adaptability or versatility
If complex angular displacement mechanism is used to secure insert, then insert coupling is improved, but fluid conveyance capability is lost
Solution Approach 1:
The fastener is designed with dual functionality: the spherical head abutment surface enables angular displacement for insert coupling, while the internal fluid channel provides fluid conveyance. This multi-functional design allows the same component to achieve both mechanical securing and fluid delivery without compromise.
Solution Approach 2:
The fluid channel is nested within the fastener body, allowing fluid conveyance to occur through the internal structure of the fastener itself. This nested arrangement enables fluid delivery alongside the mechanical function of angular displacement and clamping.
4Quantity of substance
If internal fluid channel is added to fastener, then fluid conveyance capability is improved, but device complexity increases
Solution Approach 1:
The fastener integrates multiple functions including clamping, angular displacement via spherical interface, and fluid conveyance through internal channel. By combining these functions into a single component rather than adding separate mechanisms, the overall device complexity is minimized while achieving comprehensive functionality.
Data Source
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AI summary
A cutting tool fastener (20) having a rotation axis (A) and configured to secure together, and establish a fluid path between, two cutting tool members (16,18), while also accommodating angular and pivotal displacement between the two. The fastener (20) comprising a head (22) with at least one head opening (34) for emitting fluid, and a body (24) which extends from the head and has a body opening (50) for receiving fluid to be emitted via the head opening (34). The head (22) has a spherical head abutment surface (30) with a bottom spherical seal surface zone (40). At least a portion of the spherical head abutment surface faces the body, and the head opening opens out to the spherical head abutment surface. The bottom spherical seal surface zone is axially located between the body and the head opening.