Laser-Ultrasonic Spindle Shaft for Hard Material Cutting
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Solution Overview
Problem
Conventional cutting processes for high-strength or high-hardness materials like superalloys and ceramic-based composites result in tool wear and decreased efficiency, affecting cutting quality.
Innovation Solution
A multifunctional shaft apparatus integrating a laser heating device and an ultrasonic vibration system, where the laser pre-heats the workpiece to reduce mechanical strength and the ultrasonic vibration prevents chip sticking and heat-related tool damage, allowing for efficient cutting of challenging materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If general cutting processing method is used on high-strength or high-hardness materials, then the cutting process can be performed, but tool wear occurs and service life decreases
Solution Approach 1:
The laser heating assembly performs preliminary heating on the workpiece before cutting, reducing the mechanical strength of high-strength or high-hardness materials. This preliminary thermal treatment softens the material, enabling the cutting tool to operate under reduced stress and temperature, thereby preventing tool wear and extending service life while maintaining cutting efficiency
Solution Approach 2:
The system changes the physical state of the workpiece by applying laser heating, which alters the material's mechanical properties (reducing strength and hardness) before the cutting operation. This parameter change allows the cutting process to proceed with standard tools without experiencing excessive wear, thus improving both productivity and tool reliability
2Force
If laser heating is applied to reduce material strength, then cutting force is reduced, but material properties change which may affect final workpiece quality
Solution Approach 1:
The ultrasonic vibration assembly applies high-frequency periodic vibrations to the cutting tool during the cutting process. This periodic mechanical action prevents chip adhesion to the tool, reduces heat accumulation, and maintains consistent cutting conditions. The combination of laser heating (for reduced cutting force) and ultrasonic vibration (for quality maintenance) allows the system to achieve both low cutting force and high manufacturing precision
Solution Approach 2:
The ultrasonic vibration acts as an intermediary mechanism between the laser-heated workpiece and the cutting tool. It mediates the interaction by preventing direct contact between chips and the tool, reducing friction and heat generation, thereby preserving cutting quality despite the material property changes induced by laser heating
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
Enhances cutting efficiency and quality by reducing cutting force and extending tool life, while accommodating different materials through adjustable functions.
Implementation Method 1
The laser light source is configured to generate a laser light beam. The mirror assembly is disposed in the tool holder, and the mirror assembly is configured to reflect the laser light beam, such that the laser light beam is emitted into the tool holder and is further emitted out from the light outlet.
Implementation Method 2
The ultrasonic vibration assembly includes a vibration member disposed in the recessed portion of the tool holder.
Data Source
AI summary
A multifunctional shaft apparatus includes a shaft base, a spindle, a tool holder, an ultrasonic vibration assembly, a laser light source and a mirror assembly. The spindle is disposed in the shaft base. The spindle has a laser channel extending along the spindle. The tool holder is disposed on the spindle. The tool holder has a hollow passage, an inner space and a recessed portion. The hollow passage is communicated with the laser channel. An inner wall of the hollow passage has at least one through hole communicated with the inner space, and the recessed portion is disposed on a bottom surface of the tool holder. The bottom surface has a light outlet. The ultrasonic vibration assembly includes a vibration member disposed in the recessed portion. The mirror assembly is disposed in the tool holder and is configured to reflect the laser light beam generated by the laser light source.