Analysis of the screw feeding process in powder-based additive friction stir deposition

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-02-15 DOI:10.1016/j.powtec.2025.120791

Wenguang Nan , Wenbin Xuan , Ziming He , Haimeng Hou , Zhonggang Sun , Wenya Li

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引用次数: 0

Abstract

The screw-feeding process in powder-based additive friction stir deposition (AFSD) is analysed in this work, in which the effect of feeding conditions on the choking/jamming problem and the feeding rate is explored through experiment and numerical simulation using Discrete Element Method (DEM). The results show that a narrow gap between the funnel outlet and the base is prone to particle jamming, which would entirely block the funnel outlet and produce a huge force on the screw. Jamming is more easily to occur when the rotational speed is relatively larger than the translational speed, and a mathematical model of the critical rotational speed above which the particle jamming and blockage would occur is proposed. Jamming is also sensitive to the design of the funnel outlet, in which a contracting outlet would make the choking and jamming problem more serious. For the feeding conditions without jamming, the feeding rate not only depends on the rotational speed of the screw but also is significantly affected by the translational speed. The feeding rate is linear to the rotational speed only when it is larger than a critical value, and this critical rotational speed increases with translational speed. The results also clarify that a good understanding of the screw-feeding process is essential for powder-based AFSD, in which an example of successful manufacturing of a 3D part is briefly illustrated in this work.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.