SLM Filter Assembly for Homogeneous Process Gas Flow
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Solution Overview
Problem
Existing manufacturing facilities face contamination issues due to particle residues, leading to reduced precision and quality in optical interaction processes, and existing gas inflows result in inhomogeneous gas distribution and increased cleaning complexity.
Innovation Solution
A filter device comprising a distribution element with a perforated plate and a filter element, which together optimize the gas flow by preventing particle penetration and ensuring a homogeneous distribution, adapting to the specific requirements of the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If simple gas inflows are used to discharge process by-products, then particle removal is achieved, but gas flow distribution becomes inhomogeneous and cleaning complexity increases
Solution Approach 1:
The gas supply system is segmented into multiple independent gas inlets distributed across the working area, with each inlet connected to separate valves and flow controllers. This segmentation enables localized gas flow control and simplifies cleaning by isolating contamination to specific inlet regions rather than requiring complete system shutdown and cleaning.
Solution Approach 2:
A filter element is introduced as an intermediary component between the gas source and the working area. This filter captures particles before they enter the manufacturing chamber, preventing contamination while maintaining simple gas flow paths that do not require complex cleaning mechanisms.
2Object-affected harmful factors
If gas streams are introduced to discharge process by-products, then particle residues are removed, but gas flow distribution becomes inhomogeneous
Solution Approach 1:
Different regions of the working area are equipped with gas inlets having different flow rates, inlet positions, and gas composition characteristics tailored to local contamination patterns. This local quality approach ensures homogeneous overall gas distribution while effectively addressing particle residues in specific high-risk zones.
Solution Approach 2:
The gas flow system incorporates dynamically adjustable valves and flow controllers that can modify gas flow rates in real-time based on process conditions. This dynamic control maintains homogeneous gas distribution despite varying particle generation rates during different manufacturing stages.
3Object-affected harmful factors
If local introduction mechanisms are used for gas flow, then particle discharge is achieved, but gas distribution homogeneity decreases
Solution Approach 1:
The gas inlet system is designed with universal characteristics where each local inlet serves multiple functions: discharging particles, maintaining local atmosphere composition, and contributing to overall gas flow homogeneity. This multi-functionality allows the system to achieve particle removal without sacrificing gas distribution stability.
Solution Approach 2:
Sensors are integrated into the gas supply system to monitor gas composition, flow rates, and particle concentrations in real-time. This feedback information is used by control algorithms to dynamically adjust inlet flows, ensuring that local particle discharge does not compromise overall gas distribution homogeneity.
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 filter device effectively prevents contamination, ensures homogeneous gas flow, and optimizes manufacturing quality by enhancing the precision and efficiency of the manufacturing process.
Implementation Method 1
a filter element (18) configured for filtration and homogenization
Implementation Method 2
a distribution element (14, 16) for large-area introduction of a process gas flow into the working area
Data Source
AI summary
The present invention relates to an automatable manufacturing facility FA based on optical interactions, in particular a manufacturing facility for selective laser melting (SLM), and an integrated filter device FV in which, by selective insertion of device elements, both contamination by different particle residues within the manufacturing facility FA can be avoided and a manufacturing atmosphere defined by a homogeneous process gas flow can be formed. Furthermore, the present invention relates to a manufacturing system for automated manufacturing of workpieces by means of irradiation of a material to be processed, which, with the aid of controlled adaptations of the process gas to be introduced into the manufacturing facility FA to the properties of the filter device FV, enables the previously described generation of the manufacturing atmosphere, in particular independently of the manufacturing materials used.