Recoater Blade Force Monitoring for Additive Manufacturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing additive manufacturing apparatuses face challenges in ensuring uniform application of build material, leading to deviations and irregularities in the three-dimensional objects due to uneven layer formation, which can result in mechanical imperfections and damage to application elements.
Innovation Solution
An apparatus equipped with a determination unit to monitor forces acting on the application element during the application process, using force-sensitive elements and a control unit to adjust movement and process parameters, ensuring proper application and preventing contact with previously built layers or spatters, thereby maintaining process quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If build material is applied using a conventional application element without force monitoring, then the application process is simpler and faster, but the uniformity and quality of the build material layer deteriorates due to undetected contact irregularities
Solution Approach 1:
The patent applies feedback by equipping the application element with force-sensitive elements that continuously monitor contact forces during the application process. When deviations from expected force patterns are detected (indicating contact with previously built layers or spatters), the system generates signals that trigger corrective actions, such as adjusting the application element's position or pausing the process. This closed-loop feedback mechanism ensures layer uniformity while maintaining relatively simple device architecture.
2Productivity
If the application element moves at high speed without force monitoring, then productivity increases, but the risk of contact damage to the application element or previously built layers increases
Solution Approach 1:
The patent implements preliminary action by proactively monitoring contact forces before actual damage can occur. The force-sensitive elements detect potential contact issues (such as approaching previously built layers or spatters) before they result in damage. When abnormal force patterns are detected, the system preemptively adjusts the application element's movement or pauses the process, preventing damage while allowing high-speed operation to continue during normal conditions.
3Manufacturing precision
If force monitoring and real-time adjustment systems are added to the application unit, then process quality and object quality improve, but the device complexity and cost increase
Solution Approach 1:
The patent uses feedback through force-sensitive elements integrated into the application element, which continuously monitor contact forces and provide real-time information to a determination unit. This feedback mechanism enables quality control without requiring complex external monitoring systems, as the sensing capability is built directly into the application element itself.
Solution Approach 2:
The application element performs self-diagnosis and self-correction by using its own force-sensitive elements to detect contact irregularities and triggering automatic adjustments through the control unit. This self-service capability reduces the need for external monitoring and intervention systems, thereby limiting the increase in overall device complexity while maintaining high quality standards.
4Reliability
If conventional application methods are used without contact detection, then the process is faster and simpler, but deviations in object geometry and mechanical behavior occur due to uneven layer application
Solution Approach 1:
The patent maintains continuity of useful action by implementing force monitoring that operates continuously during the application process without interrupting the workflow. The force-sensitive elements provide real-time feedback, allowing the system to make minor adjustments on-the-fly rather than requiring stop-and-check procedures. This ensures consistent layer application and reliable mechanical behavior while minimizing time loss, as the monitoring and adjustment processes occur seamlessly during normal operation.
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 apparatus effectively determines and adjusts for irregularities in the application process, preventing damage and ensuring the quality of the three-dimensional objects by monitoring forces and adjusting parameters, thus improving the consistency and reliability of the additive manufacturing process.
Implementation Method 1
The determination unit (12) comprises a determination element (13) that is adapted to determine contact information relating to a force acting on the application element (7)
Data Source
Figure 1
Figure 2
AI summary
1. An apparatus (1) for additively manufacturing three-dimensional objects (2), the apparatus (1) comprising: an application unit (6) comprising a recoater blade (7) configured to apply build material (3) on a build plane (8); a determination unit (12) comprising a determination element (13) configured to determine contact information relating to a force acting on the recoater blade (7) during an application process, the force caused by a deviation in one or more previously consolidated layers (10) of build material (3) protruding from the build plane (8); and a control unit (14) configured to adjust one or more process parameters based at least in part on the contact information, wherein the one or more process parameters comprises an irradiation parameter.