3D Printer Tool Path Optimization for Thermal Deformation Control
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Solution Overview
Problem
Existing 3D-printing technologies face challenges in predicting and minimizing residual stress and deformation in additively manufactured parts due to thermal gradients, leading to defects like warping and cracks, especially for complex geometries and melting paths.
Innovation Solution
A data processing system that performs thermal/structural simulations to optimize tool paths for 3D-printers by determining the order of mesh elements deposition, simulating incremental thermal and structural deformation, and modifying tool paths to account for volume changes from adjacent elements, thereby reducing warping and stress characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thermal/structural simulations are performed to predict and minimize residual stress and deformation, then manufacturing precision and part quality are improved, but computational time and processing complexity increase
Solution Approach 1:
The simulation domain is divided into discrete mesh elements that are processed incrementally. Each element's thermal and structural characteristics are determined separately and sequentially, allowing the complex simulation to be broken into manageable computational steps that can be optimized and parallelized.
Solution Approach 2:
The system determines the deposition order of mesh elements before performing the actual simulation. By pre-planning the sequence of element processing and pre-calculating thermal characteristics, the system reduces computational overhead during the main simulation phase and optimizes processing efficiency.
2Manufacturing precision
If incremental deposit simulation with structural modification is performed to account for volume change, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The simulation system dynamically modifies the mesh structure during incremental deposit simulation. As each element is deposited, the system updates the structural characteristics and adjusts adjacent elements to account for volume changes, creating a dynamic rather than static simulation model that accurately reflects the additive manufacturing process.
Solution Approach 2:
The system uses previously determined structural deformation characteristics as feedback to modify subsequent element deposits. The thermal and structural characteristics of previously deposited elements inform the simulation of adjacent elements, creating a feedback loop that progressively refines the deformation prediction accuracy throughout the build process.
3Productivity
If tool paths are optimized based on thermal/structural simulations, then productivity is improved by reducing defects, but measurement and detection difficulty increases
Solution Approach 1:
The system creates a virtual digital twin of the additive manufacturing process through simulation. Instead of physically measuring thermal characteristics during actual manufacturing, the system copies the thermal and structural behavior in a virtual environment, allowing for non-invasive optimization of tool paths based on simulated rather than measured data.
Solution Approach 2:
The system performs thermal and structural simulations before actual manufacturing to predict deformation and optimize tool paths in advance. By determining the deposition order and modifying tool paths based on simulated thermal characteristics beforehand, the system eliminates the need for complex real-time measurements during production.
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 effectively minimizes defects in 3D-printed parts by optimizing tool paths, reducing manufacturing costs and time, and ensuring improved mechanical strength and tolerance.
Implementation Method 1
instructions usable to drive the 3D-printer to move a laser to additively produce the part
Implementation Method 2
simulate an incremental deposit of each of the elements of the mesh... determine thermal characteristics and structural deformation characteristics
Data Source
AI summary
A system and method is provided that facilitates optimizing tool paths based on thermal/structural simulations of a part produced via a 3D-printer. A processor may carry out a first simulation of the part being additively produced according to a first set of tool paths that correspond to instructions usable to drive the 3D-printer to produce the part. The first simulation may include: determining a hexahedral mesh of the part that includes a plurality of hexahedron elements; determining an order of the elements of the mesh to deposit for additively producing the part based on the first set of tool paths; and simulating an incremental deposit of each of the elements of the mesh in the order that the elements are determined to be deposited. For each incremental deposit of an additional respective element, thermal characteristics and structural deformation characteristics of the deposited elements are determined, in which some elements have a change in volume to account for a structural deformation of previously deposited adjacent elements.