Multi-Axis Compression Head for DED Overhang Builds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing compression apparatuses in additive manufacturing, such as DED, often cause distortion or failure in components with overhanging or angled geometries due to the application of compressive loads in a vertical direction, which can lead to damage or failure.
Innovation Solution
A compression rig with multiple degrees of freedom that can adjust the orientation of the compressive load in real-time, allowing it to be applied at various angles relative to the component's geometry, minimizing the risk of damage by using a combination of actuators and sensors to control the load's direction and magnitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a vertical compressive load is applied to components with overhanging or angled geometries, then the compression process can be simplified, but distortion or failure occurs in the component
Solution Approach 1:
The compression apparatus employs multiple actuators (first actuator for vertical movement, second actuator for rotational movement) that enable dynamic adjustment of the compression head's position and orientation. This allows the system to adapt the compression direction in real-time to match the component's geometry, resolving the contradiction between process simplicity and component integrity by making the compression direction controllable rather than fixed.
Solution Approach 2:
The system changes the parameters of compression application by allowing variable compression angles through rotational movement of the compression head. The controller adjusts the orientation angle based on the component's geometry, transforming the compression from a fixed vertical parameter to a variable parameter that can be optimized for each specific component shape, thereby preventing failure while maintaining manufacturability.
2Device complexity
If the compression head is fixed in orientation, then the device complexity is reduced, but it cannot accommodate components with complex geometries
Solution Approach 1:
The compression head is transformed from a fixed component to a dynamic one capable of rotational movement about an axis. The second actuator enables the compression head to rotate and adjust its orientation angle, allowing the same apparatus to handle various component geometries (overhanging, angled, vertical) without requiring multiple specialized devices, thus improving versatility while maintaining reasonable device complexity.
Solution Approach 2:
The compression apparatus is designed with multi-functionality to handle diverse component geometries using a single device. By incorporating rotational capability and controller-based orientation adjustment, the system can perform compression on components with different geometries (overhanging, angled, vertical) that would otherwise require different specialized apparatuses, achieving universality without excessive complexity.
3Adaptability or versatility
If multiple actuators are added to control compression orientation, then adaptability to complex geometries is improved, but device complexity increases
Solution Approach 1:
The complex task of orientation control is segmented into two independent functions: vertical positioning (first actuator) and rotational orientation (second actuator). This segmentation allows each actuator to handle a specific degree of freedom, making the control system more manageable and less complex than a single actuator attempting to control both position and orientation simultaneously.
Solution Approach 2:
The controller serves as an intermediary that coordinates the multiple actuators based on the component's geometry. Rather than requiring complex mechanical linkages between actuators, the controller digitally manages the coordination, simplifying the physical device structure while maintaining the adaptability to handle various geometries through software-based control logic.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A directed energy deposition additive manufacturing system may include an apparatus for applying a compressive load to a component being built in the system with an overhanging geometry. The apparatus has a compression head that applies the compressive load. The apparatus may apply the compressive load at a compression angle that may be complementary to an inclination angle of the component. The apparatus may operate in multiple degrees of freedom.