Self-Similar Robotic Phalange Assembly for Parallel 3D Printing
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Solution Overview
Problem
Current additive manufacturing techniques using SCARA, Cartesian, and Delta robots face limitations in throughput, which restricts manufacturing speed and efficiency in 3D printing processes.
Innovation Solution
A robotic system comprising an arm assembly with a pedestal, rotating members, and phalange assemblies, along with interchangeable manipulators, is integrated with stackable cargo containers and deployable environmental barriers to enhance movement range and flexibility, allowing independent and concurrent operation of multiple phalanges for increased manufacturing speed and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional single-robot additive manufacturing is used, then device complexity is low, but manufacturing throughput is limited
Solution Approach 1:
The robotic system is divided into multiple independent phalange assemblies (first, second, third, fourth phalanges), each capable of independent operation. Each phalange assembly functions as a separate robotic manipulator that can deposit material simultaneously with others, enabling parallel manufacturing operations and significantly increasing throughput while maintaining manageable complexity through modular design
Solution Approach 2:
The phalange assemblies are arranged in a nested hierarchical structure where the fourth phalange is coupled to the third, third to the second, and second to the first. This nested configuration allows multiple robotic manipulators to operate from a single base structure, enabling concurrent material deposition at different locations while sharing common support infrastructure, thus improving throughput without proportionally increasing overall system complexity
2Speed
If robotic manipulators operate in parallel, then manufacturing speed increases, but control precision becomes more difficult to maintain
Solution Approach 1:
Each phalange assembly is equipped with its own independent controller that can receive and execute deposition instructions autonomously. This segmentation of control allows each robotic manipulator to operate at high speed independently while maintaining precise control over its specific deposition path and parameters, preventing control conflicts that would otherwise compromise precision in parallel systems
Solution Approach 2:
The system incorporates sensors that detect the real-time location of each interchangeable manipulator and provide feedback to the controller. The controller uses this feedback information to determine error differences between set points and actual positions, then adjusts the position of individual phalanges independently to reduce errors, thereby maintaining manufacturing precision even as multiple manipulators operate in parallel at high speeds
3Manufacturing precision
If material deposition is performed in uncontrolled environment, then system complexity is reduced, but material quality and consistency deteriorate
Solution Approach 1:
The system employs an enclosed chamber that can be filled with controlled atmosphere or vacuum conditions to isolate the material deposition process from environmental contaminants. This creates a consistent, controlled environment for all four phalange assemblies to operate within, ensuring uniform material properties and deposition quality without requiring complex active control mechanisms for each individual manipulator
Solution Approach 2:
The enclosed chamber utilizes deployable barriers and flexible sealing mechanisms to create a controlled environment that can be easily configured and sealed. This approach provides effective environmental isolation while maintaining relative simplicity in the control system, as the barrier structure itself provides the primary environmental control rather than requiring complex active regulation systems
Data Source
AI summary
A robotic system with an arm assembly that includes: a pedestal, a first member operatively coupled to an opposing end of the pedestal, and a second member operatively coupled to an opposing end of the first member. The robotic system further includes a joint operatively coupled to an opposing end of the second member and at least one phalange assembly operatively coupled to the joint. The at least one phalange assembly includes: a third member operatively coupled to the joint, a fourth member operatively coupled to an opposing end of the third member, and a fifth member operatively coupled to an opposing end of the fourth member. The robotic system further includes an interchangeable manipulator is operatively coupled to the opposing end of the fifth member.