Rotating Irradiation Unit for Complex 3D Printing Geometries
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Solution Overview
Problem
Existing additive manufacturing methods for three-dimensional objects in powder beds are limited by the need for linear movement in specific directions, restricting the flexibility of material application and solidification, which hinders the production of complex geometries and structures.
Innovation Solution
An apparatus with a rotatably mounted irradiation unit and application unit that allows for arbitrary movement, enabling the use of a single contiguous group of irradiation elements for selective solidification of powder raw material across various directions, including circular and spiral paths, using laser or electron beams for melting or sintering processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If linear movement in specific directions is used for material application and solidification, then the manufacturing process is simpler, but the flexibility for producing complex geometries is restricted
Solution Approach 1:
The irradiation unit is made rotatable relative to the application unit, transforming the static multi-directional irradiation system into a dynamic single-unit system that can orient itself to follow the build platform movement in any direction, thus achieving arbitrary direction capability without increasing device complexity
Solution Approach 2:
A single irradiation unit is designed to perform the function of multiple fixed irradiation elements by rotating to different orientations, allowing one unit to cover all directional requirements for complex geometry production
2Adaptability or versatility
If multiple fixed irradiation element arrangements are used for multi-directional solidification, then arbitrary direction solidification is achieved, but the structure complexity and costs increase
Solution Approach 1:
Multiple fixed irradiation elements are merged into a single irradiation unit that can rotate to different positions, combining the functionality of multiple components into one unified system that achieves the same multi-directional capability with reduced complexity
Solution Approach 2:
The irradiation unit incorporates rotational movement to dynamically adjust its orientation, allowing a single static component to perform the work of multiple fixed components arranged in different directions
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 allows for the production of complex geometries with high resolution and small structure widths, enabling the use of multiple materials and achieving low wall thicknesses, while simplifying the structure and reducing costs compared to multi-directional fixed irradiation element arrangements.
Implementation Method 1
solidifying the raw material by means of energy input from a beam, in particular a laser beam or an electron beam
Implementation Method 2
melting or sintering of the powder takes place, as a result of which the desired part areas are produced
Implementation Method 3
melting or sintering of the powder takes place
Data Source
AI summary
An apparatus and to a method for producing a three-dimensional object built up from at least one material layer by selective solidification of at least one powder raw material applied successively in raw material tracks to a build platform via an application unit of the apparatus. In this case, the apparatus for solidifying the raw material via energy input from a beam has an irradiation unit forming a build group together with the application unit, wherein the irradiation unit having a contiguous group of irradiation elements is rotatably mounted on the application unit.