Internal surface finishing

Reducing surface roughness is critical for improving the mechanical properties of metal 3D printed components. As produced laser sintered metal 3D printed components suffer from high surface roughness. This problem is enormously big for the 3D printed components with intricate geometries involving a large internal surface area. To address this issue, we performed chemical polishing of the 3D printed 316 steel components. After 30 minutes of chemical polishing the color of 3D printed steel components’ surface became dull grey to bright lustrous. According to optical profilometer study, the surface morphology improved dramatically. The Rq roughness parameter changed from ∼8 um to ∼0.6 um. We also applied chemical polishing on cubical metal 3D printed components with internal surfaces. This surface finishing method was equally effective for the internal and external surfaces.

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Study of Process Characteristics of Abrasive Flow Machining (AFM) for Ti-6Al-4V and Validation with Process Model

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.797.411 ◽

2013 ◽

Vol 797 ◽

pp. 411-416 ◽

Cited By ~ 1

Author(s):

Takashi Sato ◽

Stephen Wan ◽

Yu Jing Ang

Keyword(s):

Titanium Alloy ◽

Surface Finish ◽

Empirical Data ◽

Process Model ◽

Fuel Efficiency ◽

Internal Surface ◽

Surface Finishing ◽

Complex Geometries ◽

Abrasive Flow Machining ◽

Process Characteristics

The aerospace components made of titanium alloy with internal passages have complex geometries and their surface smoothness play an important role on the improvement of fuel efficiency. Hence, a surface finishing method that can produce a conforming surface finish to all internal surface features is required. This paper studies the process characteristics of AFM for Ti-6Al-4V experimentally. In addition, validation of process model based on the tribological interaction between AFM media and Ti-6Al-4V with empirical data is carried out. The theoretical plots agreed well with experimental results on Ø20mmID cylinder although the theoretical plots show over prediction in some conditions.

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Surface finishing requirements on various internal cylindrical components: A review

Journal of Micromanufacturing ◽

10.1177/25165984211035504 ◽

2021 ◽

pp. 251659842110355

Author(s):

Talwinder Singh Bedi ◽

Ajay Singh Rana

Keyword(s):

Surface Quality ◽

Material Removal ◽

High Surface ◽

Internal Surface ◽

Modern Technology ◽

Surface Finishing ◽

Sustainable Product ◽

Finishing Processes ◽

Polishing Fluid

Modern technology requires producing of a sustainable product with a high surface accuracy. In applications where the surface quality is highly considerable in various internal cylindrical components requires technology to manufacture an ultrafine surface finish. There is, in general, a probability of inducing errors into products by the traditional finishing processes (such as grinding/honing), which lead to failure. Preferably with some evidence in the main text. Further, the advanced finishing processes are developed, where the finishing forces can be controlled by varying the power output. Instead of a solid abrasive tool, the smart polishing fluid is used, which gets activated under the magnetic fields. In this manuscript, the material removal under different internal surface finishing processes is elaborated, which helps in improving the surface quality of various industrial components. Also, the surface quality produced on various industrial components after traditional as well as advanced finishing processes are discussed.

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