Vibrational Powder Removal for 3D Printed Components
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Solution Overview
Problem
Existing additive manufacturing processes face challenges in efficiently and effectively removing residual metal powder from 3D-printed components, particularly from intricate surfaces, which can lead to powder entrapment and manual handling issues that may pack powder deeper or disperse it into the atmosphere.
Innovation Solution
An automatic vibration-based mechanical system using a six-axis industrial robot with transducers and an enclosure to apply targeted vibration energy, encapsulating the component and using inert gas to loosen and capture residual powder within a containment cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual brushing and vacuuming are used to remove residual powder, then the component can be cleaned, but the powder may be packed deeper into the component or dispersed into the atmosphere
Solution Approach 1:
The patent applies mechanical vibration at ultrasonic frequencies to the component surface to loosen and remove residual powder. The vibration causes the powder particles to detach from the component geometry and be flushed away by gas flow, preventing re-entrapment while containing the powder within a controlled enclosure rather than dispersing it into the atmosphere.
Solution Approach 2:
The patent uses gas flow (pneumatic system) to flush the loosened powder from the component surface. The gas flow carries the detached powder particles away from the component and into a collection container within an enclosed chamber, preventing atmospheric dispersion while maintaining controlled powder handling.
2Productivity
If high-energy vibration is applied to remove powder, then powder removal efficiency increases, but the component may be damaged
Solution Approach 1:
The patent uses ultrasonic vibration, which operates at high frequency with relatively low amplitude, to remove powder. This high-frequency vibration generates sufficient mechanical energy to detach powder particles from complex geometries without imparting damaging stresses to the component structure, thereby maintaining both high removal efficiency and component integrity.
Solution Approach 2:
The patent optimizes vibration parameters (frequency, amplitude, duration) to achieve effective powder removal without component damage. By carefully controlling these parameters, the system maintains the right balance where enough energy is applied to loosen powder while remaining below the threshold for causing structural damage to the component.
3Object-affected harmful factors
If the component is enclosed during vibration processing, then powder containment is improved, but the system complexity increases
Solution Approach 1:
The patent implements a nested containment structure where the component is placed within a chamber that is itself contained within an enclosure. This nested arrangement allows multiple functions (vibration application, gas flow control, powder collection) to be integrated within a hierarchical structure, improving powder containment while managing system complexity through modular design.
Solution Approach 2:
The enclosed chamber serves multiple functions simultaneously: it contains the component during vibration processing, provides a controlled environment for gas flow, collects loosened powder, and protects the operator from powder exposure. This multi-functionality reduces the need for separate systems and manages complexity by consolidating multiple requirements into a single integrated structure.
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 system gently and efficiently removes residual powder from complex geometries, preventing re-entrapment and atmospheric dispersion, facilitating post-processing and enabling reuse or recycling of the powder.
Implementation Method 1
Transducers are then activated via an electronic control unit (ECU) to cause the transducers to vibrate at a predetermined frequency or range thereof. The generated vibration energy is directed into the component directly or through intervening structure.
Data Source
AI summary
A system for removing residual powder from a three-dimensional (3D)-printed component integrally constructed with a build plate during an additive manufacturing (AM) process includes an end-effector, an enclosure, one or more transducers, and an electronic control unit (ECU). The end-effector includes a base surrounded by a perimeter flange, and includes a through-opening that receives the build plate. A perimeter clamp attaches and seal the enclosure to a perimeter flange of the end-effector such that the enclosure, the base, and the build plate collectively form a powder containment cavity. The transducers vibrate at a predetermined frequency or range thereof. The ECU transmits a vibration control signal to the transducers during a post-processing stage of the AM process to loosen and remove the residual powder from the component and collect the loosened powder within the powder containment cavity.