Purpose

Fused deposition modeling (FDM) is one of the most adopted additive manufacturing techniques to produce prototypes and/or final parts regardless of geometrical complexity restrictions. One of the most challenging aspects of this technology is the attainable roughness. The purpose of this study is to evaluate the capability of the slurry impacts to improve the surface roughness of parts fabricated using FDM. Moreover, a regression model for predicting the values of surface roughness was developed.

Design/methodology/approach

The developed technique imposes a silica–water mixture which softens the staircase on the surface and leaves it smoother. The process introduces three main factors: building orientation; layer thickness; and impact angle of the slurry particles. Experimentally, a test rig was used to evaluate the effect of these factors on surface roughness. Statistically, Analysis of variance (ANOVA) and regression analysis were conducted to study the contribution of the individual factors on the roughness.

Findings

The results reveal that the effect of slurry impacts has a good impact on surface roughness, and the three factors have significant effect on surface roughness.

Originality/value

This paper contributes to new knowledge by providing a new technique for enhancing the surface roughness of FDMed products. ANOVA and regression analysis is a useful tool to parametrically study the surface roughness in terms of building and testing factors.

中文翻译：

---

使用新型浆料冲击技术改善通过 3D 打印制造的聚乳酸 (PLA) 产品的表面粗糙度

目的

熔融沉积建模 (FDM) 是最常用的增材制造技术之一，可用于生产原型和/或最终零件，而不受几何复杂性限制。该技术最具挑战性的方面之一是可达到的粗糙度。本研究的目的是评估浆料冲击改善使用 FDM 制造的零件的表面粗糙度的能力。此外，还开发了用于预测表面粗糙度值的回归模型。

设计/方法/方法

开发的技术强加了一种二氧化硅 - 水混合物，可以软化表面上的楼梯并使其更光滑。该过程引入了三个主要因素：建筑方向；层厚；和浆料颗粒的冲击角。实验上，使用测试台来评估这些因素对表面粗糙度的影响。在统计上，进行方差分析（ANOVA）和回归分析来研究各个因素对粗糙度的贡献。

调查结果

结果表明，浆液冲击对表面粗糙度有很好的影响，三个因素对表面粗糙度都有显着影响。

原创性/价值

本文通过提供一种提高 FDMed 产品表面粗糙度的新技术，为新知识做出贡献。方差分析和回归分析是一种有用的工具，可以根据构建和测试因素对表面粗糙度进行参数化研究。