Contact Conditions in 5-Axis-Grinding of Double Curved Surfaces with Toric Grinding Wheels

Denkena, Berend; León, Luis de; Behrens, Leif

doi:10.4028/www.scientific.net/amr.126-128.41

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…To ensure comparability, the grinding forces are described and depicted as specific forces related to the geometric contact width b gS . As derived in [12], b gS = 0.8077 mm remains constant for every process parameter combination presented in this paper. After the experiments the workpiece surface and subsurface were analyzed by measuring the surface roughness according to DIN EN ISO 4288 (Perthometer PGK, Mahr) and the induced residual stresses with a diffractometer (XRD 3003 TT, GE).…”

Section: Methodsmentioning

confidence: 54%

Internally Cooled Toric Tools for Grinding of Medical Ceramics

Denkena

Grove

Tatzig

2016

AMR

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The application of ceramics for knee prostheses promises a significant extension of the lifespan compared to conventional metal implants due to their outstanding mechanical and tribological properties. Nevertheless, grinding operations at the bone-faced surface of ceramic knee implants are limited. These limitations arise from an unfavorable accessibility of coolant lubricant. Caused by undercuts and concave surfaces the external coolant jet is deflected and does not reach the contact zone. In this paper, a prototype of a toric grinding tool with internal coolant supply is introduced. This innovative tool design enables a reliable and economic grinding process of the bone-faced surface of ceramic knee implants.

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Section: Methodsmentioning

confidence: 54%

Internally Cooled Toric Tools for Grinding of Medical Ceramics

Denkena

Grove

Tatzig

2016

AMR

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“…The parameters describing the contact conditions, like the contact width b g , contact length l g and contact cross section A gs for the first path were calculated according to the formulae ( 2)-( 5) for the lateral grinding strategy. The calculation of the parameters is described in detail in [13,14].…”

Section: Grinding With Toric Grinding Pinsmentioning

confidence: 99%

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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