Deep hole drilling of AISI 1045 via high-speed steel twist drills: evaluation of tool wear and hole quality

Khan, Sarmad Ali; Nazir, Aamer; Mughal, Mohammad Pervez; Saleem, Muhammad Qaiser; Hussain, Amjad; Zakria, Ghulam

doi:10.1007/s00170-017-0587-4

Cited by 21 publications

(17 citation statements)

References 20 publications

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“…They stated that while the uncoated drill bit creates higher surface roughness, the increase in feed causes an increase in the surface roughness, and the coated drill bit provides 3 times better tool life than the uncoated drill bit. Saleem et al [12] applied drilling to 104 mm thick AISI 1045 steel material with an 8 mm diameter uncoated HSS drill bit, with 3 mm and 5 mm steps. In the study, the cutting speeds were chosen as 6 m/min and 15 m/min, and the feed rate as 10 mm/min, 15 mm/min, 20 mm/min.…”

Section: Literature Reviewmentioning

confidence: 99%

Investigation of the Effect of Drill Bit Feature on Hole Surface Quality and Tool Wear

Kıyak¹

2021

DÜMF Mühendislik Dergisi

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Section: Literature Reviewmentioning

confidence: 99%

Investigation of the Effect of Drill Bit Feature on Hole Surface Quality and Tool Wear

Kıyak¹

2021

DÜMF Mühendislik Dergisi

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“…On the other hand, the dual-channel MQL system brings air and oil separately within parallel coaxial tubes inside a rotary union; the oil-air mixture is only formed inside the tool assembly and then flowed into the cutting tool channels to reach the tool cutting edges. Although published data for high aspect ratio drilling [2][3][4][5][6][7][8][9], or machining with external MQL [10][11][12][13] have been published, only limited published information for internal MQL was found.…”

Section: Literature Reviewmentioning

confidence: 99%

Characterization and Performance of Minimum Quantity Lubricants in Through-Tool Drilling

Patil

Raval

Bangma³

et al. 2020

IJEMM

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This study characterized airborne microdroplet diameters and size distribution from two commercially available lubricants A and B for internal minimum quantity lubrication (MQL). The effects of air pressure, oil channel size, physical properties of lubricants on the resultant microdroplets and through-tool MQL drilling performance were studied. Airborne microdroplet diameters were highly sensitive to the coolant channel sizes and air pressure. Cluster method was used to divide microdroplets into smaller clusters for comparison. Experimental data show that the average airborne microdroplet of lubricant B was larger than that of lubricant A at different air pressures and channel sizes. The contact angle of lubricant A was at least 10° less than that of lubricant B when depositing on glass or aluminium. High-speed imaging showed the tendency of more viscous lubricant B sticking to the drill tip, and higher pressure and longer time was required to atomize this viscous oil. Built-up-edges were less significant when drilling A380 aluminium with lubricant A. Due to high machinability of A380 aluminium, variation of hole diameter and hole cylindricity were minimal when drilling with different lubricants. Insignificant improvement in hole quality was observed when drilling with excessive amount of MQL lubricants or high concentration of lubricant C in flood coolant.

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“…The resistance offered by the material, coolant, depth to diameter (L/D) 33 ratio, and the speed and feed are responsible for the quality of the hole. 34, 35…”

Section: Designed Micro-drilling Machine Tool and Test Specimensmentioning

confidence: 99%

Experimental and numerical investigation of difference in diameter enlargement and circularity of micro-holes drilled by flexural spindle head

Shinde

Lekurwale

2020

Journal of Micromanufacturing

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The flexural bearing or the flexural cartridge allows very nano-meter axial displacement movement, which is frictionless and noiseless. The repeatability of the mechanism obtained is achieved by bending of the load element. The bearing can operate under stringent conditions such as vacuum, elevated temperatures (0–40 °C), and moist conditions. Hence, due to these indigenous properties, these bearings are observed in applications such as linear bearing of linear compressor, flexural bearing electromagnetic linear actuator, and parasitic error-free mechanism. The endorsed capability of obtaining high-level positional accuracy along with repeatability leads to design and development of low-cost flexural cartridge for micro-drilling spindle head. This flexural cartridge provides a linear guideway while feeding inside the test specimen (in micro-drilling operation). The designed head dampens and nullifies the force, acting on the shaft carrying the micro-tool. The designed spindle head carrying the three-leg spiral flexural stack is assembled on the designed machine tool. The run out measured on the spindle shaft is 50 µm. Four test specimens, namely aluminum, brass, acrylic and mild steel, are drilled by three drills of diameter 1 mm, 0.8 mm, and 0.5 mm each. The main objective of the article is to understand the differential analysis of diameter enlargement and circularity between the experimental method and the numerical method. The answers predicted by the experimental method may have second possible value as it depends upon judgment of inscribing the circle/points in the computer-aided design (CAD) environment. This ambiguity is excluded by the MATLAB code, which gives one specific answer. The maximum difference in diameter enlargement for aluminum, brass, acrylic, and mild steel specimens are 3.8 µm, 11 µm, 24.6 µm, and 16.1 µm, respectively, whereas the maximum difference in circularity for the same specimens is 11.8 µm, 1.3 µm, 8.2 µm, and 16.8 µm, respectively. This difference is termed as the |error|.

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Deep hole drilling of AISI 1045 via high-speed steel twist drills: evaluation of tool wear and hole quality

Cited by 21 publications

References 20 publications

Investigation of the Effect of Drill Bit Feature on Hole Surface Quality and Tool Wear

Investigation of the Effect of Drill Bit Feature on Hole Surface Quality and Tool Wear

Characterization and Performance of Minimum Quantity Lubricants in Through-Tool Drilling

Experimental and numerical investigation of difference in diameter enlargement and circularity of micro-holes drilled by flexural spindle head

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