Additive Manufacturing Path Generation for Stable Layer Alignment

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Solution Overview

Problem

Conventional additive manufacturing techniques face challenges in maintaining continuous manufacturing for long periods without positional deviation between layers, leading to manufacturing defects like sagging.

Innovation Solution

An additive manufacturing path generation device that generates a manufacturing path by creating a reference path from the intersection line between a layer definition surface and a reference path surface, and then generates multiple manufacturing path candidates parallel to the reference path, allowing for the selection of a stable manufacturing path.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a reference path is determined for each layer on the basis of the geometric contour of the cross section of each layer, then the manufacturing path can be generated for each layer, but positional deviation between upper and lower layers occurs, causing manufacturing defects such as sagging

Engineering Contradiction:

Improvemanufacturing path generationVSAvoidpositional accuracy between layers

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent divides the manufacturing path generation into two distinct components: a reference path determined by geometric contour for ease of generation, and position correction applied separately to eliminate deviation. This segmentation allows each component to optimize its function independently while resolving the contradiction between ease of manufacture and positional precision.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent replaces the traditional mechanical approach of directly using geometric contours as manufacturing paths with a computational method that calculates position corrections based on cumulative layer deviations. This substitution enables precise control of inter-layer positioning through algorithmic correction rather than relying solely on geometric accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If continuous manufacturing is performed for a long time, then productivity is improved, but positional deviation accumulates between layers, causing manufacturing defects

Engineering Contradiction:

Improvecontinuous manufacturing capabilityVSAvoidmanufacturing quality consistency

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the position correction for each layer is calculated based on the cumulative deviation from previous layers. This feedback loop continuously compensates for positional drift that accumulates during continuous manufacturing, maintaining quality consistency over extended production periods while preserving productivity benefits.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent applies position correction in advance before actual manufacturing of each layer, calculating the required adjustment based on predicted cumulative deviation. This preliminary action prevents positional deviation from accumulating during continuous manufacturing, ensuring reliability is maintained throughout extended production runs.

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If a single reference path surface is used for multiple layers, then the number of reference paths is reduced, but positional deviation between layers increases

Engineering Contradiction:

Improvereference path managementVSAvoidlayer positioning accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent introduces position correction as an intermediary element between the single reference path surface and the actual manufacturing paths of multiple layers. This intermediary compensates for the loss of individual path customization, maintaining layer positioning accuracy while benefiting from the simplified reference path management enabled by using a single reference surface.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250199507A1Additive manufacturing path generation device, additive manufacturing path generation method, additive manufacturing system, and additive manufacturing method

Publication Date: 2025.06.19 MITSUBISHI ELECTRIC CORP

AI summary

An additive manufacturing path generation device that generates a manufacturing path for manufacturing a manufactured object by layering layers each formed by adding a material along the manufacturing path includes: a reference path generation unit that generates, for each of the layers, a reference path from an intersection line between a layer definition surface and a reference path surface, the layer definition surface defining a target layer, the reference path surface restraining a position of the reference path for generating the manufacturing path; and a manufacturing path generation unit that generates, for each of the layers, manufacturing path candidates a plurality of paths parallel to the reference path in the layer definition surface, and generates the manufacturing path on the basis of the generated manufacturing path candidates, and the reference path generation unit generates the reference paths based on the single reference path surface common to the layers.