3D Printing Route Planning with Support-Point-First Deposition
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Solution Overview
Problem
Conventional 3D printing methods using directed energy deposition (DED) require additional processes to determine whether to perform additive or removal machining based on height changes, leading to increased shaping time and reduced accuracy.
Innovation Solution
A machining program generation device that generates a program for controlling a 3D printing apparatus by extracting support points from machining path data and generating a machining route where support points are shaped first, followed by shaping the gap line segments connecting them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If additional processes are used to determine whether to perform additive or removal machining based on height changes, then shaping accuracy is improved, but shaping time increases
Solution Approach 1:
The machining path is divided into multiple sub-paths in advance, and support points are determined beforehand. This preliminary segmentation allows the system to pre-plan the machining sequence, identifying which points require support and how to structure the sub-paths, thereby improving shaping accuracy without adding time-consuming runtime decisions
Solution Approach 2:
The machining path is segmented into multiple sub-paths with identified support points. This segmentation transforms the complex problem of height control into manageable segments where support structures are strategically placed at predetermined locations, enabling accurate shaping while maintaining efficient continuous machining
2Manufacturing precision
If support points are shaped first and then gap line segments are shaped, then shaping accuracy is improved, but machining complexity increases
Solution Approach 1:
The machining path is automatically segmented into sub-paths with identified support points based on geometric features. This segmentation creates a structured machining sequence where support points are processed first, followed by gap line segments, improving accuracy while the automated segmentation keeps the control system manageable
Solution Approach 2:
Support points are identified and marked in advance during the path segmentation phase. This preliminary identification allows the machining system to prepare the support points first, establishing a foundation for subsequent gap line segment machining, thereby improving overall shaping accuracy without requiring complex real-time decision-making
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
This approach improves shaping accuracy while preventing an increase in shaping time by stabilizing the shape of beads and ensuring precise formation of support points and gap line segments.
Implementation Method 1
forming an object by stacking a plurality of layers including a bead obtained by adding a machining material melted to a target surface
Implementation Method 2
directed energy deposition (DED) is superior to other additive manufacturing methods
Data Source
AI summary
A machining program generation device that generates a machining program for controlling a 3D printing apparatus to form an object by stacking a plurality of layers, includes: a machining route generation unit that extracts a plurality of support points that are based on an end point, an intersection point, and a bending point of the machining path from machining path data indicating a shape and a position of the machining path for forming each of the plurality of layers, and generates a machining route by adding, to the machining path, an order of shaping indicating that shaping of the support points is to be executed first and then shaping of a gap line segment connecting the plurality of support points shaped is to be executed; and a machining program generation unit that generates a machining program for controlling the 3D printing apparatus according to the machining route.