Purpose

This paper aims to enhance the surface finish of the fused deposition modeling (FDM) part using the vapor smoothening (VS) post-processing method and to study the combined effect of FDM and VS process parameters on the quality of the part.

Design/methodology/approach

Analysis of variance method is used to understand the significance of the FDM and VS process parameters. Following this, the optimized parameter for multiple criteria response is reported using the technique for order preference by similarity to ideal solution. The process parameters alternatives are build orientation angle, build surface normal and exposure time and the criteria are surface roughness and dimensional error percentage.

Findings

The result observed contradicts the result reported on the independent parameter optimization of FDM and VS processes. There is a radical improvement in the surface finish on account of the coating process and an increase in the exposure time results in the decrease of the surface roughness. Minimum surface roughness of 0.11 µm is observed at 1,620 build angle and the least dimensional error of 0.01% is observed at build orientation angle 540. The impact of VS on the up-facing surface is different from the down-facing surface due to the removal of support material burrs and the exposure of the surface to vapor direction.

Originality/value

A study on the multi-criteria decision-making to ascertain the effect of post-processing on FDM component surface normal directed both to downward (build angle 0°–90°) and to upward (build angle 99°–180°) are reported for the first time in this article. The data reported for the post-processed FDM part at the build angle 0°–180° can be used as a guideline for selecting the optimal parameter and for assigning appropriate tolerance in the CAD model.

中文翻译：

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气相平滑熔融沉积建模零件的多准则决策方法

目的

本文旨在使用蒸汽平滑 (VS) 后处理方法提高熔融沉积成型 (FDM) 零件的表面光洁度，并研究 FDM 和 VS 工艺参数对零件质量的综合影响。

设计/方法/方法

方差分析法用于了解 FDM 和 VS 工艺参数的意义。在此之后，使用与理想解决方案相似的顺序偏好技术报告了多标准响应的优化参数。可选的工艺参数是构建方向角、构建表面法线和曝光时间，标准是表面粗糙度和尺寸误差百分比。

发现

观察到的结果与 FDM 和 VS 过程的独立参数优化报告的结果相矛盾。由于涂层工艺，表面光洁度得到了根本性的改善，并且暴露时间的增加导致表面粗糙度的降低。在 1,620 构建角处观察到 0.11 µm的最小表面粗糙度， 在构建方向角 540 处观察到 0.01% 的最小尺寸误差。VS 对朝上表面的影响不同于朝下表面，因为去除支撑材料的毛刺并将表面暴露在蒸汽方向。

原创性/价值

报告了一项关于多标准决策的研究，以确定后处理对 FDM 组件表面法线的影响，该法线指向向下（构建角度 0 ° –90 °）和向上（构建角度 99 ° –180 °）。在这篇文章中是第一次。在构建角度 0 ° –180 °处为后处理 FDM 零件报告的数据可用作选择最佳参数和在 CAD 模型中分配适当公差的指南。