Laser Beam Melting Defect Analysis via Preliminary Component
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laser beam melting processes often result in defects such as pores, cracks, and bonding issues due to factors like laser beam attenuation, heat dissipation problems, and process by-products, which affect the mechanical properties of produced components.
Innovation Solution
A method to produce a defective test component by laser beam melting that replicates the process conditions of real manufacturing, identifying and targeting defect-prone areas using a process monitoring system to ensure the test component exhibits similar defects, allowing for effective investigation of their impact on mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a generative layer-by-layer construction process is used to produce three-dimensional workpieces, then complex geometries can be manufactured, but defects such as pores, cracks, and bond layer defects occur due to laser beam attenuation, heat dissipation problems, and process by-products
Solution Approach 1:
The patent applies preliminary action by producing an analysis component before actual production components to identify defect-prone areas. Process parameters are recorded during the analysis component production, and defect-prone areas are identified in advance, allowing subsequent production components to be manufactured with adjusted parameters that prevent defects before they occur.
Solution Approach 2:
The patent implements feedback by using a process monitoring system to record process parameters during laser beam melting of the analysis component. The recorded data is evaluated to identify defect-prone areas, and this information feeds back into adjusting process parameters for subsequent production components, creating a closed-loop quality improvement system.
2Reliability
If process parameters are adjusted to prevent defects, then component quality improves, but the ability to investigate the influence of defects on mechanical properties is reduced
Solution Approach 1:
The patent applies local quality by intentionally allowing defects to occur in specific defect-prone areas identified during analysis component production, while maintaining high quality in other areas through optimized process parameters. This creates components with localized defects that can be used to investigate defect influences while maintaining overall component quality.
Solution Approach 2:
The patent segments the production process into two distinct phases: first producing defect-free production components using optimized parameters, and separately producing test components with intentional defects in specific areas. This segmentation allows both quality improvement and defect investigation capabilities to coexist.
3Adaptability or versatility
If targeted defects are incorporated in the 3D model to produce defective fatigue specimens, then defect influence investigation is enabled, but the defects do not reflect real manufacturing process conditions
Solution Approach 1:
The patent uses preliminary action by producing an analysis component first to identify where defects naturally occur during laser beam melting. These empirically identified defect-prone areas are then used as the basis for producing test components, ensuring that defects occur in realistic locations rather than being arbitrarily placed in 3D models.
Solution Approach 2:
The system uses itself to generate realistic defect data by producing an analysis component under actual production conditions, recording process parameters, and using this self-generated information to guide subsequent test component production. This self-service approach ensures defects reflect real manufacturing conditions rather than theoretical assumptions.
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 the production of a test component with defects comparable to production components, facilitating the transfer of defect investigation results to improve manufacturing quality and mechanical properties.
Implementation Method 1
a raw material powder is applied layer by layer to a build platform arranged in a process chamber and, depending on the desired geometry of the workpiece to be created, is exposed to laser radiation at specific locations by an irradiation device. The radiation penetrating the powder layer causes heating and, consequently, fusion and/or sintering of the raw material powder particles.
Implementation Method 2
During the production of the analysis component, at least one process parameter that is characteristic of the occurrence of component defects is recorded by a process monitoring system
Data Source
Figure 1
Figure 2
AI summary
In a method for producing a defective test component (22) by laser beam melting, an analysis component is produced in a first build process by laser beam melting. This is achieved by successively applying multiple layers of raw material powder to a build platform (10) and selectively irradiating them with laser radiation, depending on the desired geometry of the analysis component. During the production of the analysis component, at least one process parameter characteristic of component defects is recorded by means of a process monitoring system. Based on the result of the process parameter recording, a defect-prone area (20) of the build platform (10) is identified where a high incidence of component defects is to be expected.In a second construction process, at least one defective test component (22) is produced by laser beam melting by successively applying a plurality of raw material powder layers to the build platform (10) and selectively irradiating at least in the defect-prone area (20) of the build platform (10) depending on the desired geometry of the at least one defective test component (22) with laser radiation.