Milling Tool Flank Cooling Layout for Insert Edge Cooling
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Solution Overview
Problem
Existing milling tools often inadequately direct coolant to the flank or relief surface of cutting inserts, leading to suboptimal cooling and reduced tool life.
Innovation Solution
A milling tool design featuring a coolant passageway with a channel that directs coolant as a coherent stream from the flank face to the cutting edge, enhancing cooling efficiency and tool life by ensuring precise coolant distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coolant is provided via a coolant chamber with a deflection surface to pass over the relief surface, then coolant can reach the cutting edge, but the coolant is provided as an elongated sheet which is not optimal for cooling efficiency
Solution Approach 1:
The coolant delivery system is segmented into distinct functional zones: a coolant chamber for accumulation, a deflection surface for directional control, and a targeted outlet positioned at the insert seat. This segmentation allows the coolant to be delivered in a controlled stream rather than a dispersed sheet, improving cooling efficiency while ensuring reliable delivery to the cutting edge.
Solution Approach 2:
The deflection surface acts as an intermediary element between the coolant chamber and the cutting edge. It mediates the coolant flow by redirecting it from the chamber towards the insert seat, transforming the flow pattern from an elongated sheet to a more focused stream that efficiently reaches the flank and cutting edge.
2Reliability
If coolant is directed to the flank face with a channel having length greater than width, then cooling effectiveness is improved, but the passageway complexity increases
Solution Approach 1:
Instead of delivering coolant directly to the cutting edge from the center, the system inverts the approach by targeting the flank face first. The outlet is positioned at the insert seat to deliver coolant onto the flank face, which then naturally flows towards the cutting edge, providing effective cooling through the workpiece material contact area.
Solution Approach 2:
The coolant delivery is extended into the radial dimension by positioning the outlet at the insert seat rather than only on the end face. This dimensional change allows the coolant to be delivered directly to the flank face area, creating a three-dimensional cooling path that improves effectiveness without excessive structural complexity.
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
The design improves cooling effectiveness and extends tool life by providing a focused coolant stream directly to the cutting edge, reducing heat and chip re-cutting issues.
Implementation Method 1
The second portion of the coolant passageway is directed towards the insert seat such that, when a cutting insert comprising a cutting edge and a flank face is mounted in the insert seat such that the flank face faces outward with respect to the tool body, coolant emerging from the outlet will pass along the flank face towards the cutting edge
Implementation Method 2
coolant emerging from the outlet will pass along the flank face towards the cutting edge
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a tool body (1) for a milling tool. The tool body includes a front end (5), a rear end (6), an envelope surface (7) extending between the front end (5) and the rear end (6), a central recess (8) extending from the rear end (6) and configured to receive coolant from a spindle of a machine, at least one insert seat (3) in which a cutting insert (2) can be securely mounted formed in a transition between the front end (5) and the envelope surface (7), and at least one coolant passageway for passage of coolant from the central recess (8) to the exterior of the tool body (1). The coolant passageway comprises a first portion (9) extending from the central recess (8) in an outward direction towards the envelope surface (7), and a second portion extending from the first portion (9) to an outlet (11) in the exterior of the tool body (1), wherein the outlet (11) is located in the insert seat (3) and/or in the envelope surface (7) behind the insert seat with respect to a rotation direction of the tool body (1). The second portion of the coolant passageway is directed towards the insert seat (3) such that, when a cutting insert (2) comprising a cutting edge (24) and a flank face is mounted in the insert seat (3) such that the flank face faces outward with respect to the tool body, coolant emerging from the outlet (11) will pass along the flank face towards the cutting edge (24). The second portion of the coolant passageway is a channel (10) having a length that is greater than a width thereof.