Considerations on material thickness influence on the AWJ processing quality of an aluminium alloy

Herghelegiu, Eugen; Radu, Crina; Schnakovszky, Carol; Tâmpu, Cătălin

doi:10.1051/matecconf/20179403007

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…For TiN/TiAlN, increasing the feed rate increased the perpendicularity error at n = 2000 and 3000 rpm, while the opposite was almost true for TiAlN and TiN at the same speeds. Similar to the cylindricity error, the range of perpendicularity error in the current study was less than that found for aluminum drilled with cryogenic cooling [63], and it was much less than aluminum drilled using abrasive-water-jet machining [65], with the annotation that different federates and spindle speeds were used in the aforementioned studies.…”

Section: Effect Of Cutting Parameters and Tool Coatings On Hole Cylindricity And Perpendicularitysupporting

confidence: 58%

Evaluation of Cutting-Tool Coating on the Surface Roughness and Hole Dimensional Tolerances during Drilling of Al6061-T651 Alloy

Al-Tameemi

Al-Dulaimi

Awe³

et al. 2021

Materials

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Aluminum alloys are soft and have low melting temperatures; therefore, machining them often results in cut material fusing to the cutting tool due to heat and friction, and thus lowering the hole quality. A good practice is to use coated cutting tools to overcome such issues and maintain good hole quality. Therefore, the current study investigates the effect of cutting parameters (spindle speed and feed rate) and three types of cutting-tool coating (TiN/TiAlN, TiAlN, and TiN) on the surface finish, form, and dimensional tolerances of holes drilled in Al6061-T651 alloy. The study employed statistical design of experiments and ANOVA (analysis of variance) to evaluate the contribution of each of the input parameters on the measured hole-quality outputs (surface-roughness metrics Ra and Rz, hole size, circularity, perpendicularity, and cylindricity). The highest surface roughness occurred when using TiN-coated tools. All holes in this study were oversized regardless of the tool coating or cutting parameters used. TiN tools, which have a lower coating hardness, gave lower hole circularity at the entry and higher cylindricity, while TiN/TiAlN and TiAlN seemed to be more effective in reducing hole particularity when drilling at higher spindle speeds. Finally, optical microscopes revealed that a built-up edge and adhesions were most likely to form on TiN-coated tools due to TiN’s chemical affinity and low oxidation temperature compared to the TiN/TiAlN and TiAlN coatings.

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Section: Effect Of Cutting Parameters and Tool Coatings On Hole Cylindricity And Perpendicularitysupporting

confidence: 58%

Evaluation of Cutting-Tool Coating on the Surface Roughness and Hole Dimensional Tolerances during Drilling of Al6061-T651 Alloy

Al-Tameemi

Al-Dulaimi

Awe³

et al. 2021

Materials

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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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“…The most extensively studied use of abrasive-H 2 O-jet technology is in the manufacturing of aluminium alloys. Range of Al alloys investigated in scientific studies is very wide, ranging from approximately unadulterated aluminium alloys (1xxx series) [11,12] to Al-Mg alloys (5xxx series) [11,13,14], Al-Mg-Si alloys (6xxx series) [11,[15][16][17][18][19][20][21][22], and Al-Zn-Mg alloys (7xxx series) [11,23,24]. Table 1.…”

Section: Design Of Experiment-doementioning

confidence: 99%

Experiment of Input Parameters on Abrasive Water Jet Machining

Rai¹,

Jha²

2021

JUSST

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This analysis looks at the impact of modifying the coarse water jet wounding limitations on the disorder of the work piece’s superficial layer. Air Jet for Abrasiveness The aerospace industry mostly uses machining to remove high-métier components and additional composites. The majority of his uses are in the machining of a gas turbines, engines, spacecraft, atomic reactors, and pumps, among other things. Rough waterjet machining is a new machining technique in which materials a is removed by abrasion. A high-velocity watercourse of abrasive subdivisions combined through purified water is directed at the work superficial. The current research focuses on the experimental investigation and assessment of abrasive H2O jet machining procedure using reaction surface technique to assess the technical factors influencing the machining efficiency of CFRP laminate. Kerf candle, delamination, material elimination rate, and superficial roughness were found to be affected by standoff coldness, feedstuff rate, and jet strain. The material connected parameter, location of fiber, has been also found to touch the machining performance. Using Taguchi’s principle, Design of Experimentations are used to determine the impact of process strictures on optimal environment. To determine the best conditions, a series of tests are carried out. Method parameter optimization is expected. To verify the desired degree of Processes parameter prediction, a conformation experiment is carried out.

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Considerations on material thickness influence on the AWJ processing quality of an aluminium alloy

Cited by 6 publications

References 4 publications

Evaluation of Cutting-Tool Coating on the Surface Roughness and Hole Dimensional Tolerances during Drilling of Al6061-T651 Alloy

Evaluation of Cutting-Tool Coating on the Surface Roughness and Hole Dimensional Tolerances during Drilling of Al6061-T651 Alloy

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

Experiment of Input Parameters on Abrasive Water Jet Machining

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