A roughness model for the machining of biomedical ceramics by toric grinding pins

Denkena, Berend; Köhler, Jens; Meer, M. van der

doi:10.1016/j.cirpj.2012.07.002

Cited by 18 publications

(7 citation statements)

References 20 publications

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“…Let E(t) be the ellipse resulting from the projection along P of the cutter centre-torus circle, and Redonnet et al (2013). This correct assumption in the case of machining by grinding tool like (Denkena et al 2010(Denkena et al , 2013, seems also to be correct in the case of milling at low feed rate. The notion of "low feed rate" remains largely subjective and in most cases it should be possible to use higher feed rate than it is for finishing operation due to the low depth of cut and thus low cutting forces- Tai and Fuh (1994).…”

Section: Analytical Model Of Scallop Height Context and Analytic Exprmentioning

confidence: 93%

An analytical model taking feed rate effect into consideration for scallop height calculation in milling with torus-end cutter

Segonds¹,

Seitier²,

Bordreuil³

et al. 2017

J Intell Manuf

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Feed rate effect on scallop height in complex surface milling by torus-end mill is rarely studied. In a previous paper, an analytical predictive model of scallop height based on transverse step over distance has been established. However, this model doesn't take feed rate effect into consideration. In the present work an analytical expression of scallop height, including feed rate effect, is detailed in order to quantify feed rate effect and thus to estimate more precisely the surface quality. Then, an experimental validation is conducted, comparing the presented model predictions with experimental results. Actually, the share of the scallop height due to feed effect is highly dependent on the machining configuration. However, most of time, the feed effect on total scallop height values is far from being negligible. Keywords Free-form surface • CNC machine-tool • End-mill • Toroidal cutter • Effective tool radius • Feed rate • Scallop height B Stéphane Segonds

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Section: Analytical Model Of Scallop Height Context and Analytic Exprmentioning

confidence: 93%

An analytical model taking feed rate effect into consideration for scallop height calculation in milling with torus-end cutter

Segonds¹,

Seitier²,

Bordreuil³

et al. 2017

J Intell Manuf

View full text Add to dashboard Cite

show abstract

“…To achieve a fine surface roughness needed for such applications, after cutting (e.g. milling, drilling) operations, specialised finishing processes need to be employed such as automated bonnet polishing [34,211], simultaneous 5-axis polishing with resilient tools [46,185], drag finishing, magnetic abrasive finishing (MAF) [207], or magnetorheological fluid polishing [168].…”

Section: Cobalt-based Alloysmentioning

confidence: 99%

Machining of biocompatible materials — Recent advances

et al. 2019

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Machining of biocompatible materials is facing the fundamental challenges due to the specific material properties as well as the application requirements. Firstly, this paper presents a review of various materials which the medical industry needs to machine, then comments on the advances in the understanding of their specific cutting mechanisms. Finally it reviews the machining processes that the industry employs for different applications. This highlights the specific functional requirements that need to be considered when machining biocompatible materials and the associated machines and tooling. An analysis of the scientific and engineering challenges and opportunities related to this topic are presented. Cutting, biomedical, biocompatible materialsTitanium acetabular head Titanium femoral stem Composite Bone

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“…Due to a lead angle β f = 30° and a tilt angle β fN = 30° used in this investigation, the contact width b g is always larger for the frontal grinding strategy than for the lateral grinding strategy. The contact length l g is always smaller for the frontal grinding strategy than for the lateral strategy [12].…”

Section: Grinding With Toric Grinding Pinsmentioning

confidence: 90%

Influence of dressing strategy on tool wear and performance behavior in grinding of forming tools with toric grinding pins

Denkena

Krödel-Worbes

Keitel

et al. 2021

Prod. Eng. Res. Devel.

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The performance of grinding tools in grinding processes and the resulting surface and subsurface properties depend on various factors. The condition of the grinding tool after dressing is one of these factors. However, the influence of the dressing process on the condition of the grinding tool depends on the selected process parameters and is difficult to predict. Therefore, this paper presents an approach to describe the influence of the dressing process on tool wear of toric grinding pins and the resulting subsurface modification. For this purpose, toric grinding pins with a vitrified bond were dressed with two different strategies and the wear and operational behavior were investigated when grinding AISI M3:2 tool steel with two different grinding strategies. In general, the investigations have shown that the dressing process influences the performance and wear behavior differently depending on the grinding strategy used. The degree of clogging is influenced by the geometric contact sizes. In the case of small engagement cross sections with simultaneously large contact lengths the thermal tool load is distributed over a small annular area of the tool and favors clogging. Crushing and additional transverse loading of the grains result in an almost clog-free tool surface. This also leads to a lower G-ratio. Crushing leads to an intensified decrease of the torus radii. The influence of the dressing strategy can also be observed in the induced residual stresses. Toric grinding pins dressed by crushing induce lower compressive residual stresses into the workpiece, which can be attributed to the self-sharpening effect. This effect reduces the mechanical and thermomechanical load of the workpiece during machining.

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A roughness model for the machining of biomedical ceramics by toric grinding pins

Cited by 18 publications

References 20 publications

An analytical model taking feed rate effect into consideration for scallop height calculation in milling with torus-end cutter

An analytical model taking feed rate effect into consideration for scallop height calculation in milling with torus-end cutter

Machining of biocompatible materials — Recent advances

Influence of dressing strategy on tool wear and performance behavior in grinding of forming tools with toric grinding pins

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