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STL model penetration error comprehensive compensation method in 3DP process

A technology of error compensation and compensation method, applied in manufacturing, additive processing, processing data acquisition/processing, etc., can solve problems such as lack of research, failure to consider the influence of penetration error and compensation, etc., to improve calculation efficiency and reduce traversal The number of times, the effect of improving computing efficiency

Pending Publication Date: 2020-12-04
HEBEI UNIV OF TECH
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Problems solved by technology

However, the existing compensation techniques do not take into account the influence and compensation of seepage errors.
[0005] For the approximation error caused by the nature of the STL model, domestic and foreign scholars have relatively mature research, but for the compensation of the binder penetration error of the droplet jetting 3DP process, domestic related research is relatively lacking

Method used

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  • STL model penetration error comprehensive compensation method in 3DP process
  • STL model penetration error comprehensive compensation method in 3DP process
  • STL model penetration error comprehensive compensation method in 3DP process

Examples

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Embodiment

[0088]Taking the bunny rabbit model as an example, set the residual error in the Z direction to be 0.1mm after the compensation of the penetration error in the Z direction, and the penetration error in the XY direction to be 0.6mm, set the layer thickness h to 0.3mm, and do not perform layer compensation, that is, ht=0; Perform layering to obtain the number of layers N=286, and the length l of the line segment on each layer i and its corresponding triangular patch angle is θ i and other information, and then calculate the single-layer error Vs of each layer according to the formula k And the total error Vw of the STL model. Set the layer compensation amount ht(ht∈[-h,h]) of each layer for layer compensation, in order to make the Vs of the layer k The value is the smallest, and the single-layer error of each layer is superimposed to obtain the total error of the STL model. For the rabbit model, the total error of the STL model before and after using the layered compensation ...

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Abstract

The invention relates to an STL model permeability error comprehensive compensation method in a 3DP process, which comprises the following steps: after a printed STL model is obtained, permeability error related parameter setting is firstly carried out, Z-direction permeability error calculation compensation is then carried out to obtain Z-direction permeability error compensation amount, and theZ-direction permeability error compensation amount is used for compensating the model to obtain a permeability error compensation result, an STL model after Z-direction compensation is obtained; pre-layering processing is carried out on the basis of the STL model after Z-direction compensation to obtain a wireframe model of current STL model layering surface data information; XY-direction penetration error calculation compensation is performed on the layered wireframe model to obtain an XY-direction penetration error layered compensation amount, and XY-direction penetration error compensationis performed by using the layered compensation amount to obtain an XY-direction compensated wireframe model; and interpolation compensation is performed on the wire frame model after the XY-directioncompensation to obtain a final wire frame model. The influence of penetration errors on the quality of the printing model is reduced.

Description

technical field [0001] The invention relates to a comprehensive compensation method for penetration errors of STL models in 3DP technology. Background technique [0002] The 3DP process first slices the model to be printed in a discrete manner, and then inputs the path to be printed in each layer into the computer, and controls the layer-by-layer printing of the printer through the computer. Due to the different molding processes, compared with the traditional manufacturing process, the 3DP process includes three-dimensional model construction, slicing, layer-by-layer printing, post-processing and other processes. However, limited by the printing process, the quality of the 3DP process will be affected by many factors, the printing accuracy is not high, and the error of the printed part is relatively large. In order to reduce the printing error and improve the precision of the workpiece, scholars at home and abroad have carried out a lot of related research. [0003] At pr...

Claims

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Application Information

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IPC IPC(8): G06F30/20B29C64/10B29C64/386B33Y10/00B33Y50/00G06F113/10
CPCG06F30/20B29C64/10B29C64/386B33Y10/00B33Y50/00G06F2113/10Y02P10/25
Inventor 杨伟东高翔宇刘志越王再旺刘睿颖李浩男
Owner HEBEI UNIV OF TECH
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