Experimental investigations on single-lip deep hole drilling of superalloy Inconel 718 with small diameters

Biermann, Dirk; Kirschner, M.

doi:10.1016/j.jmapro.2015.06.001

Cited by 43 publications

(15 citation statements)

References 17 publications

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“…The reasons for the hole straightness deviation are still poorly understood due to the lack of knowledge on the exact drilling mechanism inside the hole. It could be attributable to the variability in the workpiece material hardness and yield strength; misalignment of the apex between the preceding and succeeding drills; variation in the inner and outer cutting edges arising from the resharpening process [2]; misalignment in drill shafts, inadequate stiffness of the drill stem, poor cutting edge preparation [3]; rapid degradation and premature breakage of the carbide cutting edges [4]; poor selection of the drilling parameters, including speed, feed rate and coolant pressure and flow rate [5,6]. Since the tool shaft in deep hole drilling is extraordinarily long, an initial study revealed that the influence of its dynamics on the drilling process may not be neglected [7].…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Effects of multi-support misalignments on hole straightness predict model in deep hole drilling

Xue

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Straightness is one of the key technical indicators for deep hole gun drilling. This work studies the effect of drill shaft support misalignment on hole straightness in relation to various control factors. Misalignments occur in machine spindles, intermediate supports and pilot bushings. A predictive hole straightness deviation model for multi-support deep hole drilling process is introduced using the Euler column theory. The model considers the effect of the misalignment of whip guides in addition to the effects of the varying distance among the supports. The model also takes into account the effects of the thrust force and the drill lengths. Through simulation, this work analyzes the effect of each control factor on the results and optimizes the setting for each control factor. Further experiments on Ti6Al4V alloy then verify these estimates. Through research, fixed support at chip box has a greater influence on straightness deviation as compared to the misalignment at other supports; the distance between supports nearer to the chip box has more control on straightness deviation as compared to the other support distances.

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Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Effects of multi-support misalignments on hole straightness predict model in deep hole drilling

Xue

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…Etienne Robert Perrona et al [37] Exploration of the possibility of drilling of high quality features in green powder metallurgy components. Biermann, D. & Kirschner, M. [38] Experimental investigations on single lip deep hole drilling of super alloy-Inconel 718 with small diameters. Khashaba, U. et al [39] Machinability analysis while drilling woven GFR/epoxy composites.…”

Section: Subject Of Discussionmentioning

confidence: 99%

Implementation of Machining on the Cloud: A Case Study in PLM Environment

Bhatt¹,

Segonds²,

Maranzana³

et al. 2016

IFIP Advances in Information and Communication Technology

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“…Coolant cutting can obtain better surface roughness and tool life; the coating can reduce tool wear. Biermann et al [15] analyzed the chip formation mechanism, tool wear status and drilling quality when micro-drilling Inconel 718 superalloy deep holes, optimized the structure of the micro-drill and reduced the wear of the tool tip. Kwong et al [16] studied the effects of cutting speed, feed rate, wear of cutting edge and cooling lubrication on subsurface damage and residual stress distribution of micro-drilling superalloy RR1000.…”

Section: Introductionmentioning

confidence: 99%

Study on hole quality and surface quality of micro-drilling nickel-based single-crystal superalloy

Zhou

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Nickel-based single-crystal superalloy has no grain boundary. This makes the traditional cutting mechanism of shearing and slipping along grain boundary of polycrystalline material based on the theory of elastic-plastic deformation not suitable for drilling single-crystal parts. To achieve high-quality and low-damage micro-drilling of nickel-based single-crystal superalloy, the micro-drilling surface/subsurface quality of the (001) crystal plane of nickel-based single-crystal superalloy was studied in this paper. Firstly, the influence rules of the cutting speed (v s) and the feed rate (v w) on the micro-drilling hole size, surface morphology, surface roughness and subsurface damage depth were studied. Then, the micro-hardness on micro-drilling subsurface was analyzed. Finally, the subsurface recrystallization was explored. The results show that with the increase in v s , the hole diameter error and the surface roughness decrease, and the depth of subsurface plastic deformation layer decreases first and then increases; with the increase in v w , the error of hole diameter and the surface roughness increase, and the depth of the deformation layer decreases first and then increases. When v w > 0.33 μm/r, there are severe scratches on the surface of the hole wall, and the hole wall appears undulating stripes; white layer structure and severe plastic deformation layer appeared on the micro-drilling subsurface; the γ and γ' phases' deformation is severe; the micro-hardness at the subsurface white layer is small, and the micro-hardness value at the plastic deformation zone is large; after the hightemperature treatment, γ phase dissolves on the subsurface of micro-drilling parts, and the cellular recrystallization and the complete recrystallization occur. The minimum thickness of recrystallization layer obtained is 1.43 μm at v s = 141 m/min and v w = 0.105 μm/r. This study provides a good guidance and reference for the machining of nickel-based single-crystal superalloy micro-hole parts.

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Experimental investigations on single-lip deep hole drilling of superalloy Inconel 718 with small diameters

Cited by 43 publications

References 17 publications

RETRACTED ARTICLE: Effects of multi-support misalignments on hole straightness predict model in deep hole drilling

RETRACTED ARTICLE: Effects of multi-support misalignments on hole straightness predict model in deep hole drilling

Implementation of Machining on the Cloud: A Case Study in PLM Environment

Study on hole quality and surface quality of micro-drilling nickel-based single-crystal superalloy

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