Authors: | Bengfort, Philipp Stracke, Dennis Künne, Bernd |
Title: | Establishment of a rotary print head to effect residual stresses and interlayer bonding in an FLM-process |
Language (ISO): | en |
Abstract: | n fused layer modeling (FLM) manufacturing technology, there is an increased demand for semi-crystalline materials due to their favorable mechanical properties, such as high strength and toughness. The reasons for their limited use are process-related residual stresses and reduced interlayer bonding, resulting in component distortion, warping and poor strength. Addressing these problems, this paper presents the development and implementation of a rotary print head that enables local laser pre-deposition heating and forced air cooling in the 2.5-dimensional FLM process. Samples of polypropylene are fabricated to investigate the effects of the modified process on residual stresses and interlayer bonding. The investigations show that local laser pre-deposition heating can positively influence the interlayer bonding. In combination with a reduction of the extrusion temperature and additional cooling, it is possible to considerably reduce the residual stresses. The results of this research show that pre-deposition heating and forced air cooling significantly improve the processability of semi-crystalline thermoplastics in the FLM process. |
Subject Headings: | FLM FDM Pre-deposition heating Laser Rotary print head Polypropylene Additive manufacturing Residual stress Warping Interlayer bonding |
Subject Headings (RSWK): | Fused Deposition Modeling Laser Druckwerk <Technik> Polypropylen Rapid Prototyping <Fertigung> Mechanische Beanspruchung Warping Kunststoffkleben |
URI: | http://hdl.handle.net/2003/40359 http://dx.doi.org/10.17877/DE290R-22234 |
Issue Date: | 2021-07-27 |
Rights link: | https://creativecommons.org/licenses/by/4.0/ |
Appears in Collections: | Fachgebiet Maschinenelemente |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
jmmp-05-00082-v2.pdf | 31.73 MB | Adobe PDF | View/Open |
This item is protected by original copyright |
This item is licensed under a Creative Commons License