Multi-Source Preheating Device for Machining Thermal Stability
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Solution Overview
Problem
Conventional thermally-assisted machining methods using a single laser heat source rapidly cool the material being machined, leading to rough surfaces and degraded machining quality due to premature cooling, necessitating increased laser output which can damage tools and alter material properties.
Innovation Solution
A multiple heat source-type preheating device employing a first and second heat source provision module, where the first module is a laser module and the second is an induction heater, both with different preheating areas and depths, sequentially providing heat to maintain a stable preheating temperature, controlled by a unit based on machining depth and material conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single laser heat source is used for preheating, then the material can be heated quickly, but the preheating temperature decreases rapidly when the heat source is stopped, causing rough surfaces and degraded machining quality
Solution Approach 1:
The single laser heat source is segmented into multiple heat sources (first and second heat source provision modules) that operate sequentially or simultaneously. This segmentation allows continuous heat supply to different zones of the material, preventing rapid temperature decrease and maintaining machining quality while preserving fast heating capability.
Solution Approach 2:
The patent implements continuity of useful action by using multiple heat sources that can overlap their heating zones or operate in sequence without interruption. The first and second heat source provision modules ensure that heat supply continues even when one module stops, eliminating the rapid cooling problem and maintaining stable preheating temperature for high-quality machining.
2Temperature
If the laser output is increased to maintain preheating temperature, then the cooling effect is reduced, but the tool may be damaged or the material properties may be altered
Solution Approach 1:
The total heating requirement is segmented across multiple heat source provision modules, each operating at lower individual output levels. This distributes the thermal load and prevents excessive temperature concentration that could damage tools or alter material properties, while collectively maintaining the required preheating temperature stability.
Solution Approach 2:
Different heat source provision modules target different local zones of the material with appropriate heat intensity. The first and second modules can be positioned to heat specific regions, applying heat locally where needed rather than uniformly across the entire workpiece, thus avoiding overheating and tool damage while maintaining temperature stability in the machining zone.
3Device complexity
If a single heat source is used, then the device complexity is low, but it cannot smoothly preheat the overall range of the portion to be machined by the tool
Solution Approach 1:
The heating system is segmented into multiple modular heat source provision modules, each capable of independently heating specific zones. This segmentation enables comprehensive coverage of the entire machining area while maintaining relatively simple individual module designs, balancing device complexity with preheating versatility.
Solution Approach 2:
The multiple heat source provision modules are designed with universal functionality to handle various machining scenarios. Each module can operate independently or in combination with others, allowing the system to adapt to different material types, machining depths, and geometric configurations, thus achieving smooth preheating across the overall range while maintaining design simplicity.
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 device maintains preheating temperature for a longer period, ensuring smooth machining without tool or material damage, and allows for universal application across various materials and machining depths by controlling the preheating sequence and location of the heat sources.
Implementation Method 1
At least any one of the first heat source provision module and the second heat source provision module may be a laser module configured to radiate a laser beam as a heat source
Implementation Method 2
At least any one of the first heat source provision module and the second heat source provision module may be an induction heater configured to preheat the portion of the material to be machined through induction heating by providing an electromagnetically induced current thereto
Data Source
AI summary
A multiple heat source-type preheating device for a machining apparatus is provided. The multiple heat source-type preheating device for a machining apparatus includes a first heat source provision module and a second heat source provision module. The first heat source provision module is installed to be moved along a portion of a material to be machined along with a spindle adapted to rotate a tool at high speed, and is configured to preheat the portion of the material to be machined by providing a heat source thereto. The second heat source provision module is installed to be moved along with the first heat source provision module, and is configured to preheat the portion of the material to be machined by providing a heat source thereto while preceding or following the first heat source provision module.