Gundrill life improvement for deep-hole drilling on manganese steel

Zhang, Wei; He, Feng; Xiong, Dilin

doi:10.1016/j.ijmachtools.2003.09.004

Cited by 6 publications

(3 citation statements)

References 1 publication

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“…Modern designs use great lead and generating diameters so that the flank surface of the outer cutting edge does not affect the shape of the flank plane of the inner cutting edge, or the shoulder dub-off as shown in Fig. 5.20a [15]. The lead and generating diameter of this surface are relatively large so the line, or rib of intersection 1 of outer 2 and inner 3 flank surfaces does not extend too far from the vertical axis.…”

Section: Basic Geometrymentioning

confidence: 99%

Deep-hole Tools

2010

Springer Series in Advanced Manufacturing

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This chapter discusses classification, geometry, and design of deep-hole drills. The concept of self-piloting is explained. The system approach to deep-hole machining is introduced and common system issues are discussed with examples. The major emphasis is placed on gundrills. A number of simple design rules are proposed and explained with examples. The conditions of free penetration of the drill into the hole being drilled are explained. The geometry consideration is systemically related to MWF flow and thus the concept of the optimum MWF flow rate is explained. A number of novel design concepts are revealed. This chapter also discusses system consideration in experimental study of gundrill parameters. It is demonstrated that tool life is a complex function not only of geometry parameters and machining regime alone but also of their combination. Tool geometry optimization using the Hooke and Jeeves method is also discussed.

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Section: Basic Geometrymentioning

confidence: 99%

Deep-hole Tools

2010

Springer Series in Advanced Manufacturing

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“…Drill life improvement has been a concern of many researchers for many years [ 40 , 41 ]. Even though ion implantation technology has been used for improvement of many tools, its impact on the durability of the guide pads was never addressed properly.…”

Section: Introductionmentioning

confidence: 99%

Wear Resistance Improvement of Cemented Tungsten Carbide Deep-Hole Drills after Ion Implantation

et al. 2021

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The paper is dedicated to the life prolongation of the tools designed for deep-hole drilling. Among available methods, an ion implantation process was used to improve the durability of tungsten carbide (WC)-Co guide pads. Nitrogen fluencies of 3 × 1017 cm−2, 4 × 1017 cm−2 and 5 × 1017 cm−2 were applied, and scanning electron microscope (SEM) observations, energy dispersive spectroscopy (EDS) analyses, X-ray photoelectron spectroscopy (XPS) and Secondary Ion Mass Spectrometry (SIMS) measurements were performed for both nonimplanted and implanted tools. The durability tests of nonimplanted and the modified tools were performed in industrial conditions. The durability of implanted guide pads was above 2.5 times greater than nonimplanted ones in the best case, presumably due to the presence of a carbon-rich layer and extremely hard tungsten nitrides. The achieved effect may be attributed to the dissociation of tungsten carbide phase and to the lubrication effect. The latter was due to the presence of pure carbon layer with a thickness of a few dozen nanometers. Notably, this layer was formed at a temperature of 200 °C, much smaller than in previously reported research, which makes the findings even more valuable from economic and environmental perspectives.

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“…And in another paper, D.Biermann et al [9] investigated that the influence of a cutting edge preparation on the deep hole drilling process. Zhang et al [10] proved that the geometry optimization of drill point has great potential for tool life improvement. Mohammed WM et al found [11] the effect of cutting speed (and feed rate) on cutting forces and cutting temperature determine the type of tool wear in CGI machining through simulation.…”

Section: Introductionmentioning

confidence: 99%

Study of Double-Edged Gun Drills with Different Edge Types in Drilling Compacted Graphite Iron

Chen

Shi

et al. 2020

KEM

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Deep-hole machining is an important part in the field of mechanical processing of diesel engine. Gun drill has been widely used in deep-hole machining because of its high dimensional accuracy, high efficiency and good straightness. Through experiments on drilling compacted graphite iron with two different edge types of double-edged gun drills, the spindle power, axial force and tool wear were analyzed and found out one edge type which is more suitable for processing compacted graphite iron. This paper presents a simulation of deep hole drilling to validate the analysis. The research results have important guiding significance for deep hole processing of compacted graphite iron.

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Gundrill life improvement for deep-hole drilling on manganese steel

Cited by 6 publications

References 1 publication

Deep-hole Tools

Deep-hole Tools

Wear Resistance Improvement of Cemented Tungsten Carbide Deep-Hole Drills after Ion Implantation

Study of Double-Edged Gun Drills with Different Edge Types in Drilling Compacted Graphite Iron

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