Movable Segmented Toolholder for Deep Groove Coolant Delivery
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Solution Overview
Problem
Existing cutting assemblies face challenges in efficiently delivering coolant to the interface between the cutting insert and workpiece, especially as the groove depth increases, due to obstruction by the workpiece, which hampers effective cooling during material removal operations.
Innovation Solution
A toolholder design with a movable upper and lower section that includes a coolant delivery passage and fastener bore system, allowing coolant to be discharged directly parallel to the cutting insert's central axis, ensuring consistent coolant delivery throughout the cutting operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant is delivered to the cutting insert-workpiece interface using conventional arrangements, then cooling is provided at the interface, but coolant delivery efficiency deteriorates as groove depth increases due to workpiece obstruction
Solution Approach 1:
The toolholder is segmented into an upper section and a lower section that can move relative to each other. This segmentation allows the upper section to be positioned at different heights, enabling coolant delivery to the cutting insert-workpiece interface even as groove depth increases. The segmented structure overcomes the obstruction problem by allowing vertical adjustment of the coolant delivery position.
Solution Approach 2:
The upper section is made movable relative to the lower section through a fastening mechanism, transforming a static toolholder into a dynamic one. This dynamic capability allows the toolholder to adapt its configuration during different cutting operations, maintaining effective coolant delivery to the interface regardless of groove depth variations.
2Productivity
If the cutting insert engages the workpiece at the outside diameter for groove cutting, then grooving operation is performed, but coolant delivery to the interface becomes increasingly difficult as groove depth increases
Solution Approach 1:
The movable upper section enables the toolholder to dynamically adjust its configuration during grooving operations. As the groove depth increases, the upper section can be repositioned to maintain optimal coolant delivery alignment, making the operation easier and more effective throughout the entire cutting process.
Solution Approach 2:
The invention adds vertical dimensionality to coolant delivery by allowing the upper section to move axially. This dimensional change enables coolant to be delivered to deeper interfaces by adjusting the vertical position of the upper section, overcoming the limitations of fixed-depth coolant delivery in conventional toolholders.
3Device complexity
If a fixed toolholder structure is used, then结构简单性 is maintained, but coolant delivery effectiveness deteriorates when cutting depth varies
Solution Approach 1:
The toolholder incorporates a movable upper section that can be fastened at different positions, providing dynamic adaptability without excessive complexity. The fastening mechanism allows for adjustable configuration while maintaining structural integrity, achieving a balance between complexity and effectiveness.
Solution Approach 2:
The adjustable upper section serves multiple functions: it maintains coolant delivery effectiveness for varying groove depths, provides structural support, and enables reconfiguration for different cutting operations. This multi-functionality reduces the need for multiple specialized toolholders, justifying the added complexity through versatility.
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 design enhances coolant delivery efficiency to the cutting insert-workpiece interface, maintaining effective cooling as the groove depth increases, thereby improving the cutting process by ensuring more coolant impinges the interface, reducing heat generation and improving material removal performance.
Implementation Method 1
a coolant delivery passage in fluid communication with the fastener bore wherein the coolant delivery passage has an exit adapted to direct coolant to the cutting insert
Data Source
AI summary
A toolholder has a head region, which contains a slot separating the head region into a lower section and an upper section, with a lower seat and an upper section to retain a cutting insert. The head region contains a coolant entrance passage, which receives coolant from a coolant source, and a coolant delivery passage, which discharges coolant toward a cutting insert. The head region further contains a fastener bore, which receives a fastener. The fastener has an axial fastener bore which provides fluid communication between the coolant entrance passage and a coolant reservoir between the fastener and the fastener bore. The coolant delivery passage communicates with the coolant reservoir to receive coolant, which passed from the coolant entrance passage and through the axial fastener bore into the coolant reservoir.