Laser Beam Scanning for Precise Concave Feature Machining
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Solution Overview
Problem
Existing beam processing technologies face challenges in efficiently and accurately processing workpieces, particularly in forming precise concave features on materials like duralumin and CFRP, with limitations in control and precision of processing beams.
Innovation Solution
A beam processing apparatus and method utilizing a laser light source, Galvano mirror, and control system to precisely control the position and movement of the processing beam, enabling removal and additive processing on workpieces by sweeping the beam along desired trajectories, with options for thermal and non-thermal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a processing beam is used to remove material from a workpiece, then material removal efficiency is improved, but heat impact on the workpiece increases causing thermal damage
Solution Approach 1:
The patent employs pulsed laser irradiation where the processing beam is applied in periodic pulses rather than continuous exposure. This allows the material to be removed efficiently during each pulse while the intervals between pulses permit heat dissipation, preventing excessive thermal accumulation and damage to the workpiece.
Solution Approach 2:
The processing beam rapidly traverses the workpiece surface in a scanning motion, completing material removal in each localized area before moving to the next position. This quick passage minimizes the duration of heat exposure at any given point, reducing thermal damage while maintaining overall processing efficiency.
2Adaptability or versatility
If the beam irradiation position is changed to process different areas, then processing versatility is improved, but positioning precision deteriorates
Solution Approach 1:
The patent incorporates a position detection system that provides real-time feedback on the actual location of the processing beam relative to the workpiece. This feedback information is used by the control system to make precise adjustments, ensuring that the beam maintains accurate positioning even when moving between different processing areas, thus preserving both versatility and precision.
Solution Approach 2:
The patent replaces mechanical positioning systems with optical field-based positioning using a scanning processing beam. The beam position is controlled through optical deflection mechanisms (such as galvanometer mirrors or acousto-optic modulators) rather than physical movement of the entire processing head, enabling rapid repositioning with high precision and greater versatility in accessing different workpiece areas.
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
Enables high-precision processing of workpieces, including forming concave features with accuracy and efficiency, reducing heat impact on materials, and accommodating various materials such as metals and composites.
Implementation Method 1
a laser light source configured to generate the processing beam
Implementation Method 2
a beam irradiation position change member that is disposed on an optical path of the processing beam and configured to change an irradiation position of the processing beam on a workpiece
Data Source
Figure 1
Figure 2A~2C
Figure 3~4
AI summary
A beam processing apparatus is a beam processing apparatus that irradiates a workpiece with a processing beam, and performs a removal processing of a first part of the workpiece by irradiating a first surface of the workpiece with the processing beam while moving an irradiation position of the processing beam along a first direction, and performs a removal processing of a second part of the workpiece by irradiating a second surface, which is formed at the workpiece by the removal processing of the first part, with the processing beam while moving the irradiation position of the processing beam along the first direction. A moving range of the processing beam for the removal processing of the second part is smaller than a moving range of the processing beam for the removal processing of the first part.