Variable Slice Thickness for 3D Printing Step Effect
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Solution Overview
Problem
Existing 3D printing technologies face a trade-off between printing efficiency and accuracy due to fixed layer thickness, leading to a 'step effect' on non-vertical surfaces, which compromises surface quality and increases costs.
Innovation Solution
A layer-thickness variable slicing method that adjusts slice thickness based on slope angles, using the formula δ = k * sinα min, where k ranges from 0.1 to 1, to optimize slice thickness for different surface orientations, ensuring efficient and accurate printing by varying slice thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed layer thickness is used for slicing, then printing efficiency is improved, but surface quality deteriorates due to step effect on non-vertical surfaces
Solution Approach 1:
The patent implements dynamic layer thickness adjustment by varying the slice thickness according to the slope angle of each layer's outer profile. The slicing system calculates the minimum slope angle α_min for each layer and adjusts the layer thickness δ dynamically using the formula δ = k × sin(α_min), where k is a control parameter. This transforms the static fixed-thickness slicing into a dynamic adaptive process that responds to geometric features, resolving the contradiction between efficiency and surface quality.
Solution Approach 2:
The patent changes the slicing parameter (layer thickness) based on the geometric parameters (slope angles) of the workpiece. By establishing a functional relationship between layer thickness and slope angle through the formula δ = k × sin(α_min), the system adaptively adjusts thickness parameters to match surface geometry, thereby eliminating step effects on inclined surfaces while maintaining reasonable printing efficiency.
2Productivity
If layer thickness is increased to improve efficiency, then printing speed is improved, but accuracy deteriorates due to severe step effect
Solution Approach 1:
The patent applies local quality by assigning different layer thicknesses to different spatial locations based on their slope characteristics. Vertical surfaces (α_min = 90°) receive thicker slices for efficiency, while inclined surfaces (smaller α_min) receive thinner slices proportional to sin(α_min) to maintain accuracy. This localized adaptation resolves the contradiction by optimizing thickness for each specific geometric context rather than using a uniform global parameter.
3Manufacturing precision
If layer thickness is decreased to improve accuracy, then surface quality is improved, but printing efficiency deteriorates
Solution Approach 1:
The patent changes the slicing parameter (layer thickness) based on the geometric parameters (slope angles) of the workpiece. By establishing a functional relationship between layer thickness and slope angle through the formula δ = k × sin(α_min), the system adaptively adjusts thickness parameters to match surface geometry, thereby eliminating step effects on inclined surfaces while maintaining reasonable printing efficiency.
Data Source
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AI summary
Provided are a layer-thickness variable slicing method, a 3D printing method and a 3D printed product in the technical field of additive manufacturing. The layer-thickness variable slicing method comprises the following steps: analyzing and identifying the slope angle α of each slicing position on inner and outer profiles of a three-dimensional model with respect to a slicing direction, and determining the minimum value αmin of the slope angles α at the same slicing position; setting a function relationship between the minimum value αmin of the slope angles α corresponding to each portion of the inner and outer profiles and the thickness δ of a slice layer, wherein the minimum value αmin of the slope angles and the thickness δ of the slice layer form a linear function relationship therebetween; and determining the thicknesses of the slice layers corresponding to the portions of the entire product three-dimensional model. By means of the method of the present application, slices of different layer thicknesses are printed according to different profiles of a product, such that a step effect generated by equal layer-thickness slicing can be eliminated, thereby improving the quality of the product while taking into account the efficiency of printing.