Coolant-Orifice Tool Tip Layout for Chip Evacuation
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Solution Overview
Problem
Conventional tool tips for machining metal objects face challenges in delivering coolant effectively to the cutting area, leading to inefficient heat management and chip evacuation during drilling processes.
Innovation Solution
A one-piece tool tip with integrated coolant ducts and strategically arranged discharge orifices on the rake face, positioned at a non-zero angle relative to the rotational axis, enhances coolant flow and chip evacuation by distributing coolant radially and ensuring access to the cutting edge, with orifices spaced closely to the major cutting edge to optimize fluid delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional coolant delivery methods using several orifices are used, then coolant can be supplied to the cutting area, but the coolant flow is insufficient and does not effectively reach the cutting edge
Solution Approach 1:
The single coolant supply is segmented into multiple discharge orifices (at least three) arranged in a specific pattern on the rake face. This segmentation allows the coolant to be distributed across different locations to effectively reach the cutting edge and surrounding areas, improving cooling efficiency while maintaining adequate flow volume.
Solution Approach 2:
The discharge orifices are arranged in a two-dimensional pattern on the rake face surface rather than being positioned along a single line or at a single point. This dimensional arrangement ensures comprehensive coverage of the cutting zone and improves coolant distribution effectiveness.
2Ease of operation
If discharge orifices are positioned far from the cutting edge, then the tool tip structure is simpler, but coolant cannot effectively access the cutting area
Solution Approach 1:
The discharge orifices are strategically positioned in specific locations on the rake face - at least one within 5mm of the cutting edge and others arranged to cover different zones. Each orifice location is optimized for its specific function in cooling different parts of the cutting zone, achieving effective coolant delivery without excessive structural complexity.
3Temperature
If the number of discharge orifices is increased, then coolant flow distribution is improved, but chip evacuation along flutes is hindered
Solution Approach 1:
The coolant delivery system is segmented into multiple discrete orifices rather than a single large opening. This segmentation allows coolant to be delivered in distributed streams that cool the cutting zone effectively while maintaining clear pathways for chip evacuation along the flutes, preventing chip clogging.
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 improved coolant flow and chip evacuation reduce cutting temperature and forces, increasing tool life and machining efficiency by ensuring effective lubrication and chip removal.
Implementation Method 1
the at least one coolant duct being configured to be in flow communication with discharge orifices exclusively in the tool tip
Implementation Method 2
The coolant provides lubrication and cooling to the cutting edges and removes the chips from the hole
Implementation Method 3
The coolant provides lubrication and cooling to the cutting edges
Data Source
AI summary
A tool tip is integral with or removably secured to a tool body and configured to machine a metal object. The tool tip has a tool tip diameter, a rotational axis and at least one coolant duct. The tool tip includes at least one major cutting edge formed at an intersection of a rake face and a first major flank. The rake face forms part of a chip flute. The coolant duct is configured to be in flow communication with discharge orifices located exclusively in the tool tip. The tool tip has an arrangement, such as a row of two or more discharge orifices located exclusively in the rake face of a major cutting edge. The arrangement extends at a non-zero angle relative to the rotational axis.