Micro-drilling and Threading of the Ti6Al4V Titanium Alloy Produced through Additive Manufacturing

Rysava, Zdenka; Bruschi, Stefania; Carmignato, Simone; Medeossi, Fabrizio; Savio, Enrico; Zanini, Filippo

doi:10.1016/j.procir.2016.04.030

Cited by 32 publications

(14 citation statements)

References 11 publications

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“…Previous studies investigated the effect of cutting parameters, tool coating, tool geometry, and coolants on hole perpendicularity error for a variety of metallic materials such as steel, aluminum, and titanium alloys [37][38][39][40][41][42][43][44][45][46] and composite materials [36,47]. The studies found that three most significant variables on hole perpendicularity error were cutting speed, feed rate, and depth of cut [40][41][42][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

The effect of drilling parameters, cooling technology, and fiber orientation on hole perpendicularity error in fiber metal laminates

Giasin

2018

Int J Adv Manuf Technol

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Conventional twist drilling is a widely used machining process for creating holes in aerospace and automobile structures. Drilling at room temperature can sometime affect the quality of machined holes due to increased thermal effects on the workpiece. Thermal effects can be a cumbersome when machining composites and fiber metal laminates due to their different thermal expansion coefficients, which may introduce additional stress in the structure. Thermal machining effects can be minimized using coolants supplied either directly or indirectly to the cutting tool-workpiece interaction zone, to remove away part of the generated heat. The use of coolants adds extra costs for handling, disposal, and environmental impact. Therefore, environmentally friendly cooling technologies are replacing conventional cooling methods to reduce costs and impact on the environment. In addition, the selection of machining parameters has great influence on the hole quality. This paper investigates the impact of drilling parameters and two modern cooling technologies namely cryogenic liquid nitrogen and minimum quantity lubrication on the hole perpendicularity error of fiber metal laminates commercially known as GLARE® (Glass Laminate Aluminum Reinforced Epoxy). It was also found that applying cryogenic liquid nitrogen or minimum quantity lubrication does not lead to an improvement in hole perpendicularity error in GLARE® laminates.

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Section: Introductionmentioning

confidence: 99%

The effect of drilling parameters, cooling technology, and fiber orientation on hole perpendicularity error in fiber metal laminates

Giasin

2018

Int J Adv Manuf Technol

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“…Inspection of drilled and tapped microhole by X-ray computed tomography. Ti 6Al 4V dental implants fabricated by direct metal laser sintering [27].…”

Section: Microdrillingmentioning

confidence: 99%

“…Microhardness test at 50 g load, 14 s dwell time [28]. 27 Micromachining of Advanced Materials DOI: http://dx.doi.org /10.5772/intechopen.89432 because of diffusion from highly concentrated carbon in diamond tool to a lower concentration zone of carbon in workpiece materials when the cutting zone is at high temperature during machining. Selected materials that can be successfully machined with a diamond tool are shown in Table 4.…”

Section: Ultraprecision Turningmentioning

confidence: 99%

Micromachining of Advanced Materials

Hung¹,

Corliss²

2019

Micromachining

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Market needs often require miniaturized products for portability, size/weight reduction while increasing product capacity. Utilizing additive manufacturing to achieve a complex and functional metallic part has attracted considerable interests in both industry and academia. However, the resulted rough surfaces and low tolerances of as-printed parts require additional steps for microstructure modification, physical and mechanical properties enhancement, and improvement of dimensional/form/surface to meet engineering specifications. Micromachining can (i) produce miniature components or microfeatures on a larger component, and (ii) enhance the quality of additively manufactured metallic components. This chapter suggests the necessary requirements for successful micromachining and cites the research studies on micromachining of metallic materials fabricated by either traditional route or additive technique. Micromachining by nontraditional techniques-e.g., ion/electron beam machining-are beyond the scope of this chapter. The chapter is organized as following:

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“…and form and cut tapping, used for internal threads. Even if the implant is produced by additive manufacturing, the internal thread should be produced by subtractive processes [5]. The typical manufacturing process used for an internal thread is forming or cut tapping [6], but there are other two options: internal whirling and thread milling.…”

Section: Introductionmentioning

confidence: 99%

Investigation of tool deflection during milling of thread in Cr-Co dental implant

Araujo

Fromentin

2018

Int J Adv Manuf Technol

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Milling is a good option for manufacturing internal threads in hard-to-cut dental components due to lower cutting forces. In the case of a very small drilled diameter, the tool cannot be large enough to reduce tool deflection nor sufficiently small to avoid the influence of the tool penetration. As a consequence, both situations need to be considered and no other research study dealt with this aspect for the modeling of thread milling forces. This article deals with the analysis of forces, deflection, and undercutting during machining of one typical internal thread geometry used for implants in a chrome-cobalt dental alloy. The geometry is analyzed considering the influence of tool penetration and it is presented new equations to identify the regions where it occurs. Machining experiments are conducted acquiring cutting forces and tool axis position in order to calculate the tool radial forces and estimate tool deflection. Manufactured threads geometry is measured to evaluate dimension quality. It can be claimed that the tool trajectory should consider one extra revolution around the drilled hole in order to machine the undercut material due to tool deflection for this small tool diameter.

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Micro-drilling and Threading of the Ti6Al4V Titanium Alloy Produced through Additive Manufacturing

Cited by 32 publications

References 11 publications

The effect of drilling parameters, cooling technology, and fiber orientation on hole perpendicularity error in fiber metal laminates

The effect of drilling parameters, cooling technology, and fiber orientation on hole perpendicularity error in fiber metal laminates

Micromachining of Advanced Materials

Investigation of tool deflection during milling of thread in Cr-Co dental implant

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