Basic principles for the design of cutting edge roundings

Bergmann, Benjamin; Grove, Thilo

doi:10.1016/j.cirp.2018.04.019

Cited by 34 publications

(15 citation statements)

References 11 publications

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“…The contact length in the direction of chip flow, on the other hand, is primarily determined by the material properties, the tool geometry, the process parameters and the friction between tool and work- piece. The contact length on rake face and flank face affects the distribution of the normal and tangential stress distribution on the cutting edge [13]. The normal and tangential stress distribution on the cutting edge influences the effective stress distribution inside the cutting edge and are therefore of great interest for the design of cutting tools.…”

Section: Hppms-werkzeugbeschichtungen: Spanbildung Und Reibungmentioning

confidence: 99%

“…An increased contact length is generally accompanied by an increase in thermal tool load due to the increased friction distance, since the friction power is largely converted into heat. In addition, as calculated in [13], the tool is subject to greater mechanical stress at higher contact lengths, especially in feed direction. A reduced contact length during cutting is therefore advantageous.…”

Section: Analysis Of Chip Formation and Frictionmentioning

confidence: 99%

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HPPMS tool coatings: Chip formation and friction

Bobzin¹,

Brögelmann²,

Kruppe³

et al. 2021

Vak Forsch Prax

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ZusammenfassungHPPMS‐Werkzeugbeschichtungen: Spanbildung und ReibungIn der vorliegenden Studie wurden drei verschiedene mittels HPPMS abgeschiedene Verschleißschutzschichten – CrAlN+Mo:S, CrAlON und TiAlCrSiN – mit einem speziellen Hobelversuchsaufbau untersucht. Dabei wurden die Kontaktlänge zwischen Span und Spanfläche, die Spandicke und der Reibungskoeffizient beim Hobeln gleichzeitige gemessen. Anhand von Hochgeschwindigkeitsaufnahmen können die Prozesskräfte und die Spanbildung analysiert werden. Der Einfluss der Beschichtung auf Kontaktlänge, Spandicke und Reibungskoeffizienten beim Hobeln sowie der Einfluss der Schnittgeschwindigkeit wurden bestimmt. Das CrAlON‐beschichtete Werkzeug zeigte im Vergleich zu den CrAlN+Mo:S‐ und TiAlCrSiN‐beschichteten Werkzeugen bei allen untersuchten Schnittgeschwindigkeiten eine geringere Adhäsionsneigung gegenüber dem Stahlwerkstück. Dies verhindert adhäsiven Verschleiß und reduziert die Reibung, wodurch die Spandicke beim Hobeln verringert wird. Außerdem zeigte das CrAlON‐beschichtete Werkzeug eine reduzierte Kontaktlänge. Eine verringerte Reibung und eine reduzierte Kontaktlänge gehen in der Regel mit einer verringerten thermischen Werkzeugbelastung einher und verbessern somit die Schnittleistung.

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Section: Hppms-werkzeugbeschichtungen: Spanbildung Und Reibungmentioning

confidence: 99%

Section: Analysis Of Chip Formation and Frictionmentioning

confidence: 99%

HPPMS tool coatings: Chip formation and friction

Bobzin¹,

Brögelmann²,

Kruppe³

et al. 2021

Vak Forsch Prax

View full text Add to dashboard Cite

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“…Therefore, the cutting process of these alloys is investigated in order to improve them. [8] The aim of this research is increasing the durability and stability of cutting tools.…”

Section: Problem Statementmentioning

confidence: 99%

The Influence of Cutting Edge Radius on Force Load when Milling Inconel 718

Hronek¹,

Zetek²,

Bakša³

2018

Proceedings of the 29th International DAAAM Symposium 2018

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The cutting edge radius of a cutting tool plays a significant role in its durability. Durability is even more important when heavy duty materials are machined, including nickel alloy Inconel 718. The tool's durability influences the overall efficiency of the cutting process, both technically and economically. This paper investigates the effects of the cutting edge radius on the final cutting forces generated when milling Inconel 718. The cutting edge radiuses are 15 µm; 20 µm and 25 µm. A three-component dynamometer was used for measuring the cutting forces, which were measured in the X; Y and Z axes. The force measurement was related to the cutting edge wear (VBB) of the clearance surface.

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“…In summary, there is a lack of investigations concerning the influence of the MWF on chip formation, e.g., contact lengths and plowing forces resulting from the minimum chip thickness h min . A detailed analysis of the chip formation process and process forces, however, could enable quantitative and qualitative statements about mechanical stresses on the cutting wedge [14]. Thereby, more detailed knowledge about the influence of MWF on friction phenomena in cutting processes could be generated.…”

Section: Introductionmentioning

confidence: 99%

Influence of metal working fluid on chip formation and mechanical loads in orthogonal cutting

Denkena

Krödel

Ellersiek

2021

Int J Adv Manuf Technol

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Metal working fluids are used in machining processes of many hard-to-cut materials to increase tool life and productivity. Thereby, the metal working fluids act on the thermal and on the mechanical loads of the tool. The changing mechanical loads can mostly be attributed to the changing friction between rake face and chip and changes in the chip formation, e.g., the contact length between rake face and chip. However, analyzing those effects is challenging, since a detailed look at the chip formation process is prevented by the metal working fluid. In this paper, a novel planing test rig is presented, which enables high-speed recordings of the machining process and process force measurements while using metal working fluids. Experiments reveal that process forces are reduced with increasing pressure of the metal working fluid. However, the average friction coefficient only changes slightly, which indicates that the reduced process forces are mainly the result of reduced contact lengths between rake face and chip.

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Basic principles for the design of cutting edge roundings

Cited by 34 publications

References 11 publications

HPPMS tool coatings: Chip formation and friction

HPPMS tool coatings: Chip formation and friction

The Influence of Cutting Edge Radius on Force Load when Milling Inconel 718

Influence of metal working fluid on chip formation and mechanical loads in orthogonal cutting

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