Reaming Tool Coolant Channel Layout for Insert Heat Control
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Solution Overview
Problem
Existing rotary cutting tools, such as reaming tools, face challenges in maintaining tool life due to excessive heat at the insert-workpiece and guide element-bore interfaces, leading to reduced efficiency and increased operating costs, as conventional coolant delivery systems are complex and costly to manufacture.
Innovation Solution
A reaming tool with a tool body featuring an axially rearward shank and forward cutting portion, including an inlet coolant channel and non-linear outlet coolant channels that effectively direct coolant to the cutting insert and guide elements, utilizing additive manufacturing to create complex, non-linear coolant channels for efficient heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coolant delivery systems are used, then coolant can be delivered to cutting areas, but the systems are complex and costly to manufacture
Solution Approach 1:
The coolant delivery system is merged with the tool body structure itself. The coolant channels are integrated directly into the tool body, eliminating the need for separate, complex coolant delivery mechanisms. This integration maintains effective coolant delivery to cutting areas while significantly reducing system complexity and manufacturing cost.
Solution Approach 2:
The tool body serves its own coolant delivery needs through internally formed channels. The tool body structure itself provides the coolant pathways, eliminating the need for external coolant delivery systems. This self-service approach simplifies the overall system while ensuring reliable coolant delivery to critical areas.
2Duration of action of stationary object
If coolant is delivered to cutting areas, then heat is reduced and tool life is extended, but the delivery system becomes complex and expensive
Solution Approach 1:
The coolant delivery function is merged into the tool body structure through internally formed channels. This integration ensures effective heat reduction at cutting areas to extend tool life, while avoiding the need for complex external coolant systems that would increase manufacturing cost and system complexity.
Solution Approach 2:
The tool body provides its own coolant delivery infrastructure through self-formed channels during manufacturing. This self-service capability ensures continuous coolant delivery to protect the tool and extend its life, without requiring complex additional systems.
3Productivity
If non-linear coolant channels are used, then coolant delivery efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The tool body performs the self-service function of forming its own non-linear coolant channels during the manufacturing process. The manufacturing method automatically creates the optimized non-linear channel geometry within the tool body, achieving high coolant delivery efficiency without requiring complex post-manufacturing operations or assembly of complex components.
Solution Approach 2:
Traditional mechanical methods of creating linear channels are replaced with an advanced manufacturing process that can directly form complex non-linear channels. This substitution of manufacturing methodology enables the creation of optimized coolant pathways that improve delivery efficiency while maintaining ease of manufacture through process integration.
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 described reaming tool design enhances coolant delivery and heat management, extending tool life and improving production efficiency by effectively directing coolant to critical areas, thereby reducing operating costs and maintaining tool integrity.
Implementation Method 1
heat is generated at the interface between the cutting insert and the location where material is being removed from a workpiece (i.e., the insert-workpiece interface) and at the interface between the guide elements and the inner wall of the bore (i.e., the guide element-bore interface). It is well-known that excessive heat at the insert-workpiece interface and the guide element-bore interface can negatively impact upon the useful tool life
Data Source
AI summary
A reaming tool includes a tool body having an axially rearward shank portion and an axially forward cutting portion, the forward cutting portion having at least one peripherally arranged cutting insert. The reaming tool also includes an inlet coolant channel formed in the tool body and an inlet opening at an axially rearward end of the shank portion. An outlet coolant channel is formed in the tool body and is in fluid communication with the inlet coolant channel, wherein the outlet coolant channel defines an outlet opening proximate to the cutting insert. In one particular aspect, at least a portion of the outlet coolant channel is non-linear. A method of making a component of the reaming tool by performing a printing operation on a substrate to form the component is also provided.