Sealed Optical Module for Dust-Resistant Laser Beam Delivery
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Solution Overview
Problem
Existing additive manufacturing apparatuses using laser beams face challenges in maintaining the precision and cleanliness of sensitive optical components, particularly in dusty environments, which requires skilled technicians for setup and repair, leading to downtime and potential performance deterioration.
Innovation Solution
A removably mountable optical module with a hermetically sealable housing allows for precise setup and alignment of optical components in a clean environment, equipped with monitoring tools and cooling systems, enabling off-site validation and reducing dust and humidity exposure, and allowing for flexible laser beam delivery with adjustable parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sensitive optical components are built into the chassis of the manufacturing apparatus, then the laser beam can be controlled with high precision, but the optics require skilled technicians for setup and repair, leading to downtime and difficulty in on-site service
Solution Approach 1:
The optical components are segmented from the main apparatus chassis and packaged as a separate removably mountable module. This module can be easily detached and removed from the apparatus, allowing technicians to replace or service the optical components without complex disassembly or specialized skills, thereby resolving the contradiction between maintaining precision and enabling easy repair.
2Productivity
If the optical components are exposed to the dusty environment inside the apparatus, then the apparatus can operate continuously, but dust infiltration causes deterioration in performance of the optical components
Solution Approach 1:
The optical components are extracted from the dusty internal environment of the apparatus and housed in a separate module that can be positioned outside the processing chamber. This separation allows the optical components to operate in a cleaner environment while still delivering the laser beam into the apparatus, resolving the contradiction between continuous operation and component reliability.
Solution Approach 2:
A window or optical interface acts as an intermediary between the clean environment housing the optical components and the dusty processing environment. This intermediary allows the laser beam to pass through while protecting the sensitive optical components from dust infiltration, enabling both continuous operation and maintained reliability.
3Reliability
If a hermetically sealable housing is used for the optical module, then dust and humidity can be excluded to improve performance, but the module requires sealing mechanisms that may increase complexity
Solution Approach 1:
The hermetically sealable housing is designed to maintain a controlled atmosphere within the optical module without requiring active sealing mechanisms or complex control systems. The passive sealing structure automatically protects the optical components from dust and humidity, providing reliability improvement without proportionally increasing device complexity.
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 solution enhances the precision and longevity of the optical components, reduces downtime, and improves manufacturing efficiency by allowing precise control and maintenance of the laser beam in a controlled atmosphere, even in dusty environments, while enabling flexible operation with different materials and pressures.
Implementation Method 1
A focused laser beam is scanned across portions of the powder layer that correspond to a cross-section of the three-dimensional article being constructed
Implementation Method 2
The optics allowing control of the laser beam for manufacturing purposes include focusing optics, scanners and other lenses
Implementation Method 3
The scanner head includes a pair of mirrors driven by respective galvanometers
Data Source
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AI summary
An additive manufacturing apparatus (100) comprises a processing chamber (120) and an optical module (10). The optical module (10) comprises a housing containing two or more optical trains for delivering laser beams to a planar build surface (130) in the processing chamber (120). Each optical train comprises optical components for focussing and steering the corresponding laser beam.