3D Beam Irradiation Path for Uniform Heat in Additive Manufacturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing additive manufacturing methods for three-dimensional components often result in stress-induced irregularities due to localized heat input, which can lead to defects in the final product.
Innovation Solution
The method involves controlling the irradiation path of the beam during additive manufacturing to deviate from a straight feed centre line, with specific crossing points and distance ratios to ensure a more uniform heat input and reduce stress-induced irregularities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the beam point of impact is moved along linear paths for local selective solidification, then the manufacturing process is simple and fast, but stress-induced irregularities occur due to localized heat input
Solution Approach 1:
The patent applies curved (circular or elliptical) irradiation paths instead of linear paths. The beam moves along arcs that systematically cover the build-up material, distributing heat input more uniformly across the layer. This curvature-based path prevents localized heat concentration while maintaining manufacturing efficiency, thereby reducing stress-induced irregularities without significantly compromising productivity.
2Manufacturing precision
If non-linear irradiation paths are used to reduce stress, then heat distribution improves, but the processing time increases and productivity decreases
Solution Approach 1:
The patent employs periodic oscillation of the beam point of impact around the feed direction, creating a systematic back-and-forth motion along curved paths. This periodic action ensures complete and uniform heat distribution across the material layer while maintaining a controlled rhythm that optimizes processing speed. The oscillation frequency and amplitude are tuned to balance heat uniformity with manufacturing throughput.
Solution Approach 2:
The irradiation path is designed as a dynamic curved trajectory rather than a static linear path. The beam continuously adjusts its position along circular or elliptical arcs, creating a dynamic heat distribution pattern that adapts to the material layer. This dynamic approach achieves uniform heating while the path geometry is optimized to maintain efficient processing speeds.
3Device complexity
If long straight sections are used in the irradiation path, then the manufacturing process is simple, but localized heat input causes stress and irregularities
Solution Approach 1:
The patent replaces long straight sections with continuous curved paths (circular or elliptical arcs). This curvature ensures that heat is distributed across a broader area of the build-up material, preventing localized heat accumulation. The curved paths achieve this without significantly increasing device complexity, as they can be implemented through standard beam control systems following predefined geometric trajectories.
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 approach reduces stress and irregularities in the manufactured components by providing a more uniform heat input, allowing for faster processing and improved quality, especially when working with demanding materials like copper.
Implementation Method 1
locally selective solidification of the build-up material by at least one beam (15) impinging on the build-up material
Implementation Method 2
punctual melting of the build-up material (powder) and subsequent solidification
Data Source
AI summary
The invention relates to a method for additively manufacturing, wherein an irradiation path of the impinging beam deviates during the feed from a, in particular straight, feed centre line M, wherein at least one line P parallel to M or corresponding to M is successively crossed by the irradiation path at three points P1, P2 and P3, so that applies: P2 lies further forward in the feed direction than P1 and P3 lies between P1 and P2, at a distance p1 from P1 and a distance p2 from P2, where: p2/p1≥2.0, preferably p2/p1≥3.5.