Analysis of the Influence of Tool Geometry on Surface Integrity in Single-lip Deep Hole Drilling with Small Diameters

Biermann, Dirk; Heilmann, Markus; Kirschner, M.

doi:10.1016/j.proeng.2011.11.073

Cited by 22 publications

(9 citation statements)

References 1 publication

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“…The third kind of drilling bit employed, SLD bits, have an asymmetrical design, with a V-shaped external flute and guide pads. The guide pads provide a self-guiding effect and therefore improve the surface smoothness of the inner wall of the holes [32]. In this kind of bit, the cooling lubricant is supplied through the straight coolant channel in the core of the drill, and the removal of the mixture of chips and cooling lubricant takes place along the straight, V-shaped external flute.…”

Section: Methodsmentioning

confidence: 99%

Harnessing Deep-Hole Drilling to Fabricate Air-Structured Polymer Optical Fibres

Arrospide

Bikandi

Larrañaga³

et al. 2019

Polymers

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The performance of a precisely controlled drilling technique is critical in the fabrication process of microstructured polymer optical fibres. For the creation of a holey preform, adequate drilling bits with large length-to-diameter ratios provide the ability of machining preforms with complex structures and large lengths in a relatively short time. In this work, we analysed different drilling bits and techniques that can be employed for the creation of such preforms, and key parameters characterising the quality of the drilled holes, such as surface rugosity, diameter deviation, coaxiality and cylindricity were measured. For this purpose, based on theoretical simulations, four rings of air holes arranged in a hexagonal pattern were drilled in the preforms with different drill bits, and the experimental results for the above mentioned parameters have been presented. Additionally, optical power distribution of the fabricated microstructured polymer optical fibres was theoretically calculated and experimentally measured.

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Section: Methodsmentioning

confidence: 99%

Harnessing Deep-Hole Drilling to Fabricate Air-Structured Polymer Optical Fibres

Arrospide

Bikandi

Larrañaga³

et al. 2019

Polymers

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“…In addition, the 50× length allows for achieving longer preforms. Furthermore, the drill bit includes guide pads that provide a self-guiding effect, thus improving the surface smoothness of the inner wall of the holes [32].…”

Section: Fabricationmentioning

confidence: 99%

Fabrication Quality Assessment Based on the Coupling of a Dual-Core Microstructured Polymer Optical Fiber

Berganza

Arrospide

Amorebieta

et al. 2021

Sensors

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In this paper we report on the theoretical analysis and fabrication of a dual-core microstructured polymer optical fiber (mPOF) and demonstrate how the coupling characteristics of a dual-core mPOF may be a key factor to assess the quality of the fabrication process. The coupling characteristics of this fiber have been tested and, for comparison purposes, simulations regarding the effects of inaccuracies during the manufacturing process were carried out to evaluate the fabrication quality. Results indicate that theoretical, simulation and experimental data are in good agreement, which highlights the uniformity of the microstructure along the fiber and the quality of its fabrication process. In fact, the manufactured mPOF reached a coupling efficiency up to 95.26%, which makes this mPOF appealing for applications in which highly efficient power couplers are required.

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“…However, the hardening in the surface layer of the bores was lower with the circumferential form G. This can be explained by the higher surface pressure as a result of the narrow guide rails. Due to the higher surface pressure, the surface of the bore is more smoothened, the microstructure of the surface layer is more refined and hardened by the higher normal forces and presumably also higher residual stresses are introduced into the bore wall [20,21]. The variation between AlTiN and TiN coating of the tools showed no significant differences in the height of the feed forces and moments.…”

Section: Tool Designmentioning

confidence: 99%

Barkhausen Noise Assessment of the Surface Conditions Due to Deep Hole Drilling and Their Influence on the Fatigue Behaviour of AISI 4140

Baak

Schaldach

Nickel

et al. 2018

Metals

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In many technical fields, high-strength steels like AISI 4140 are commonly used for highly dynamically loaded parts. Increasing demands on weight, performance and efficiency of the automotive industry lead to increasing demands on material properties. For surface conditioning, optimised machining processes are capable of improving the fatigue performance without increasing the production cost significantly. This paper compares the influence of three different sulphur contents and three different feed rates on the fatigue behaviour of deep hole drilled AISI 4140 fatigue specimens. The specimens were characterised regarding their surface condition, hardness and microstructure, and afterwards they were tested under fatigue loading for performance assessment. These tests were accompanied with Barkhausen noise analysis. The Barkhausen noise signal was detected by a custom-built sensor that is capable of detecting the magnetic values on the bore wall. Using this technique, a load-independent estimation of fatigue damage was established.

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Analysis of the Influence of Tool Geometry on Surface Integrity in Single-lip Deep Hole Drilling with Small Diameters

Cited by 22 publications

References 1 publication

Harnessing Deep-Hole Drilling to Fabricate Air-Structured Polymer Optical Fibres

Harnessing Deep-Hole Drilling to Fabricate Air-Structured Polymer Optical Fibres

Fabrication Quality Assessment Based on the Coupling of a Dual-Core Microstructured Polymer Optical Fiber

Barkhausen Noise Assessment of the Surface Conditions Due to Deep Hole Drilling and Their Influence on the Fatigue Behaviour of AISI 4140

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