Suction Nozzle Hole Layout for Titanium Cutting Fire Prevention
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Solution Overview
Problem
Cutting devices used in aeronautics, particularly when drilling titanium, face challenges with insufficient air supply leading to temperature rise and risk of fire due to titanium shavings, which can ignite and cause damage to suction pipes and vacuum cleaners.
Innovation Solution
The cutting device incorporates a suction nozzle with circular holes along its edge and an oblong hole parallel to its axis, enhancing air supply and chip evacuation, while an infrared sensor connected to a fire detection module monitors the cutting zone for fire outbreaks and secures the device via wireless communication in case of detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the suction nozzle is pierced with small circular holes to ensure air supply, then heat evacuation is improved, but the air supply becomes insufficient for refractory materials like titanium
Solution Approach 1:
The suction nozzle is divided into multiple zones with different hole configurations: circular holes arranged along the edge for heat evacuation, and oblong holes for additional air supply. This segmentation allows each zone to perform its specific function optimally without interfering with the other.
Solution Approach 2:
Different regions of the suction nozzle are given different properties: the edge region has circular holes for heat evacuation, while the body has oblong holes for air supply. This local differentiation ensures that each area performs its designated function effectively.
2Temperature
If air supply is increased to prevent fire, then temperature control is improved, but the risk of fire remains due to insufficient chip evacuation
Solution Approach 1:
The oblong holes are positioned and sized to provide preliminary air supply that prevents chip accumulation and heat buildup before fire can occur. This proactive approach addresses the fire risk by maintaining proper air flow and chip evacuation throughout the cutting process.
Solution Approach 2:
The design converts the potential harm of increased air flow (which could exacerbate fire risk) into a benefit by using the air flow to evacuate chips and prevent heat buildup, thereby actually reducing fire risk.
3Object-affected harmful factors
If the suction nozzle design is modified to improve air flow, then fire prevention is improved, but the device complexity increases
Solution Approach 1:
The suction nozzle incorporates a porous structure with multiple holes of different shapes and positions, creating an effective air flow system without requiring complex external components or mechanisms.
Solution Approach 2:
The air supply and chip evacuation functions are merged into a single integrated nozzle structure, eliminating the need for separate components and reducing overall system complexity while achieving fire prevention.
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 configuration reduces the risk of fire by improving air flow and chip fragmentation, preventing accumulation and heat buildup, and enables rapid detection and response to potential fires, ensuring safer and more efficient cutting operations.
Implementation Method 1
a suction nozzle (114) integral with said base (112), said suction nozzle (114) being configured to remove shavings produced during cutting of the part
Implementation Method 2
at least one infrared sensor fixed in a hole formed in the wall of said head and opening onto a cutting zone inside said head
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A cutting head (10) of a cutting device (1) is described. The head (10) comprises a base (112) for mounting on a machine tool, a cylindrical suction nozzle (114) integral with the base (112), and a connector (118) integral with the base (112) and for receiving a suction hose. The suction nozzle (114) has at least one oblong hole, for example parallel to an axis of said suction nozzle.