Rotary Tool Coolant Channel Lateral Transfer Design
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Solution Overview
Problem
Existing modular rotary tools face challenges in delivering coolant effectively to the cutting insert, leading to thermal overload and limited cooling efficiency due to axial coolant transfer, which results in leakage and inadequate cooling at the contact point with the workpiece.
Innovation Solution
The rotary tool design incorporates a coolant channel system with a first partial channel extending within the carrier to a lateral outlet opening and a second partial channel within the cutting insert, allowing for lateral coolant transfer from the carrier to the cutting insert, thereby positioning coolant outlets closer to the machining site and reducing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant is conveyed through the carrier to the cutting insert via axial transfer, then the coolant can be delivered to the cutting insert, but the coolant cannot be conveyed arbitrarily close to the contact point and leakage occurs
Solution Approach 1:
The patent transitions from axial coolant transfer to radial/lateral coolant transfer. The coolant channel extends radially outward from the carrier's central axis to reach the cutting insert's coolant outlet, which is positioned near the contact point. This dimensional change allows coolant to be delivered closer to the machining site while maintaining reliable connection through the carrier-cutting insert interface.
2Temperature
If the coolant channel extends along the carrier to the front side, then coolant can be supplied to the cutting insert, but the outlet opening cannot be positioned close enough to the contact point
Solution Approach 1:
The coolant delivery system moves from a purely axial arrangement to a combination of axial and radial components. The coolant channel extends axially along the carrier and then radially outward to position the coolant outlet very close to the contact point, minimizing the distance and maximizing cooling effectiveness.
Solution Approach 2:
The cutting insert is designed with a localized coolant outlet positioned precisely at or near the contact point, rather than distributing coolant uniformly. This localized delivery ensures optimal thermal management at the critical machining zone.
3Device complexity
If axial coolant transfer is used, then the coolant channel can be simple, but coolant leakage occurs and cooling efficiency is reduced
Solution Approach 1:
By extending the coolant channel radially outward from the carrier to the cutting insert, the patent creates a more direct and sealed path for coolant delivery. This radial extension reduces leakage at the interface while maintaining reasonable structural complexity.
Solution Approach 2:
The carrier acts as an intermediary structure that houses the coolant channel and provides a sealed interface to the cutting insert. This intermediary design allows for reliable coolant transfer while isolating the coolant path from potential leakage points.
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 ensures optimal cooling by reducing coolant leakage and positioning outlets closer to the machining site, enhancing the thermal management and efficiency of the rotary tool during operation.
Implementation Method 1
at least one coolant channel (28) is formed, which serves to supply a coolant from a rear side of the rotary tool (4) to a front side
Implementation Method 2
Since the thermal load is generally highest at the machining site, i.e., at the contact point of the tool on the workpiece, it is moreover expedient to deliver the coolant to this site
Data Source
AI summary
The invention relates to a rotary tool as well as to a carrier and a cutting insert of such a rotary tool. The carrier comprises a seat, which comprises several lateral surfaces, between which the cutting insert can be inserted. The cutting insert comprises, for each of the lateral surfaces, a contact surface which abuts against the respective lateral surface in an inserted state. At least one coolant channel is formed, which comprises a first partial channel and a second partial channel, which adjoins the first partial channel, wherein the first partial channel proceeds within the carrier up to an outlet opening, wherein the second partial channel proceeds within the cutting insert from an inlet opening up to a coolant outlet, wherein the outlet opening and the inlet opening form an interface for transferring coolant from the carrier to the cutting insert. The outlet opening is arranged in one of the lateral surfaces and the inlet opening is arranged in one of the contact surfaces.