HANNOVER: Niedersächsisches Landesmuseum Hannover—Lower Saxony State Museum Hannover

Richter, Annette; Böhme, Annina

doi:10.1007/978-3-319-77401-5_29

Cited by 1 publication

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“…With an increasing single-grain chip thickness, the mechanical load also increased. The main reasons were the decreasing cutting speeds and increasing feed rates that caused a rise in chip thickness, according to F RIEMUTH [16]. The performed experiments showed a significant difference in grinding forces between grinding in air and XHV (Figure 3a,b).…”

Section: Process Forcesmentioning

confidence: 95%

“…C, ρ G and d G are the grain concentration, density of the grain and the grain diameter, respectively. Q w is the material removal rate and l g is the geometric contact length between the workpiece and the grinding wheel [16].…”

Section: Grinding Process Parametersmentioning

confidence: 99%

“…In the grinding experiment, the cutting speed, v c , and the feed rate, v f , were varied, while the depth of cut was constant at a e = 50 µm. These three process parameters could be combined within the single-grain chip thickness, h cu , which could be interpreted as a physical quantity of the load on the abrasive grains of the grinding tool during machining [16]. The single-grain chip thickness could then be correlated with the grinding forces, as illustrated in Figure 3.…”

Section: Process Forcesmentioning

confidence: 99%

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Influence of an Oxygen-Free Atmosphere on Process Forces and Workpiece Quality during the Surface Grinding of Ti-6Al-4V

et al. 2023

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Most manufacturing processes, such as grinding, are usually conducted in a standard air atmosphere. The oxygen within this atmosphere leads to oxidation effects on tools and workpieces when machining metal components. This is primarily a factor in the processing of titanium due to its high affinity for oxygen. The oxidation of the surface increases tool wear and reduces surface quality. Hence, this paper investigates the influence of the atmosphere on process forces and workpiece quality when grinding titanium (Ti6Al4V) with metal-bonded diamond grinding tools. To generate oxygen-free conditions in production processes, a novel approach allows an atmosphere with a very low oxygen partial pressure. Using a silane gas, which reacts with oxygen, the oxygen partial pressure, pO2, can be reduced below 10−12 mbar, equal to the oxygen partial pressure in an extremely high vacuum (XHV). The results show a significant influence of the atmosphere on the process forces. When grinding in XHV-adequate conditions, the grinding forces are reduced by 16% in the tangential direction and 50% in the normal direction on average, while the quality of the ground titanium surfaces is consistent (both atmospheres: Rz = 13–21 µm). Phase analysis via XRD revealed a distinct amount of titanium nitride (TiN) on the ground surfaces independently of the atmospheric conditions.

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Section: Process Forcesmentioning

confidence: 95%

Section: Grinding Process Parametersmentioning

confidence: 99%

Section: Process Forcesmentioning

confidence: 99%

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