Bohren von ausferritischem Gusseisen mit Kugelgraphit*/Drilling of austempered ductile iron – Impact of the cutting edge geometry on tool wear and machining result

2019 ◽  
Vol 109 (06) ◽  
pp. 496-504
Author(s):  
J. Hartig ◽  
B. Kirsch ◽  
J. C. Aurich
Keyword(s):  
Tool Wear ◽  
Tungsten Carbide ◽  
Ductile Iron ◽  
Cutting Edge ◽  
Machining Process ◽  
Austempered Ductile Iron ◽  
Edge Geometry ◽  
Cutting Edge Preparation ◽  
Edge Preparation ◽  
Homogeneous Preparation

Die Schneidkantenpräparation erlaubt ein gezieltes Anpassen des Werkzeugs an die Bearbeitungsaufgabe bei der Zerspanung. Homogene Präparationen können dabei entweder auf hohe Belastungen des Werkzeugs oder ein optimiertes Bearbeitungsergebnis im Sinne der Oberfläche ausgelegt werden. Mittels inhomogener Schneidkantenpräparation können die unterschiedlichen Anforderungen entlang des Eingriffs individuell in einem Werkzeug vereint werden. Im Beitrag wurden die Schneidkanten eines Wendeschneidplatten-Bohrwerkzeugs unterschiedlich homogen und inhomogen präpariert. Neben dem Werkzeugverschleiß wurde das Prozessergebnis beim Bohren von ausferritischem Gusseisen mit Kugelgraphit (ADI) 900 untersucht.   By using cutting edge preparation, tools can be tailored to the machining process. A homogeneous preparation can either be designed for high loads in the machining process or an optimized machining result on the surface. In contrast, an inhomogeneous cutting edge design can individually be designed to the machining task. In the article, the cutting edges of tungsten carbide indexable inserts were prepared homogeneous and inhomogeneous. Tool wear and machining result during drilling austempered ductile iron (ADI) 900 was investigated.

Drehen von ausferritischem Gusseisen*/Turning of austempered ductile iron – Impact of inhomogeneous cutting edge geometry on wear mechanism and machining result

2018 ◽  
Vol 108 (10) ◽  
pp. 736-742
Author(s):  
J. Hartig ◽  
B. Kirsch ◽  
J. Aurich
Keyword(s):  
Tungsten Carbide ◽  
Tool Life ◽  
Wear Mechanism ◽  
Ductile Iron ◽  
Cutting Edge ◽  
Machining Process ◽  
Austempered Ductile Iron ◽  
Machining Performance ◽  
Edge Geometry ◽  
Homogeneous Preparation

Mit Schneidkantenpräparation kann das Werkzeug im Zerspanprozess an die Bearbeitungsaufgabe angepasst werden. Homogene Präparationen können dabei entweder auf hohe Belastungen des Werkzeugs oder ein optimiertes Bearbeitungsergebnis im Sinne der Oberfläche ausgelegt werden. In diesem Beitrag wurden die Schneidkanten von Hartmetall-Wendeschneidplatten unterschiedlich inhomogen präpariert, um den unterschiedlichen Anforderungen entlang des Eingriffs Rechnung zu tragen. Neben der Werkzeugstandzeit wurde das Prozessergebnis beim Außenlängs-Runddrehen von ausferritischem Gusseisen (ADI) 900 untersucht.   The preparation of cutting edges allows for tools to be tailored to the machining process. A homogeneous preparation can either be designed for high loads in the machining process or an optimized machining result on the surface. In this article, the cutting edges of tungsten carbide indexable inserts were prepared inhomogeneously and thus individually matched to the machining task. Tool life and machining performance while turning austempered ductile iron (ADI) 900 were investigated.

Drehen von ausferritischem Gusseisen*/Turning of austempered ductile iron - How the cutting edge geometry impacts wear mechanism and machining result

2017 ◽  
Vol 107 (10) ◽  
pp. 754-760
Author(s):  
J. Hartig ◽  
B. Kirsch ◽  
M. Zimmermann ◽  
J. C. Prof. Aurich
Keyword(s):  
Tungsten Carbide ◽  
Tool Life ◽  
Wear Mechanism ◽  
Ductile Iron ◽  
Cutting Edge ◽  
Austempered Ductile Iron ◽  
Edge Geometry ◽  
Cutting Edge Preparation ◽  
The Impact ◽  
Edge Preparation

Unpräparierte Schneiden führen aufgrund mangelnder Stabilität zu unregelmäßigem Verschleißverhalten und geringen Werkzeugstandzeiten. Dem wirkt eine Stabilisierung der Schneide mittels Schneidkantenpräparation entgegen. In diesem Fachbeitrag wurde der Einfluss unterschiedlich präparierter Schneiden von Hartmetall-Wendeschneidplatten auf die Werkzeugstandzeit und das Prozessergebnis beim Außenlängs-Runddrehen von ausferritischem Gusseisen (ADI) 900 untersucht.   Unprepared cutting edges are subject to irregular wear progress and poor tool life. In contrast, cutting edge preparation provokes a stabilization of the cutting edge. This article investigates the impact of different preparations of tungsten carbide indexable inserts on tool life and machining results when turning austempered ductile iron (ADI) 900.

Schneidkantenpräparation von VHM-Mikrofräsern*/Cutting edge preparation of cemented carbide micro milling tools – A comparison of different fine machining processes

2015 ◽  
Vol 105 (11-12) ◽  
pp. 805-811
Author(s):  
E. Uhlmann ◽  
D. Oberschmidt ◽  
A. Löwenstein ◽  
M. Polte ◽  
I. Winker
Keyword(s):  
Tool Wear ◽  
Milling Process ◽  
Cutting Edge ◽  
Micro Milling ◽  
Machining Processes ◽  
Process Reliability ◽  
Cutting Edge Preparation ◽  
Milling Tools ◽  
Edge Preparation

Die Prozesssicherheit beim Mikrofräsen lässt sich mit einer gezielten Schneidkantenverrundung erheblich steigern. Dabei werden durch verschiedene Präparationstechnologien unterschiedliche Geometrien und Einflüsse auf den Fräsprozess erzeugt. Der Fachbeitrag behandelt den Einsatz präparierter Mikrowerkzeuge in Zerspanversuchen, in denen auf die Zerspankräfte, den Verschleiß sowie die Oberflächengüten eingegangen wird.   Process reliability in micro milling can be increased by a defined cutting edge preparation. Different cutting edge preparations cause different effects on tool behavior in the downstream micro milling process. In this paper, the process forces, the tool wear and the surface quality of prepared micro milling tools are characterized in cutting tests.

High-quality cutting edge preparation of micromilling tools using wet abrasive jet machining process

2017 ◽  
Vol 12 (1) ◽  
pp. 45-51 ◽  
Author(s):  
E. Krebs ◽  
M. Wolf ◽  
D. Biermann ◽  
W. Tillmann ◽  
D. Stangier
Keyword(s):  
Cutting Edge ◽  
Machining Process ◽  
High Quality ◽  
Abrasive Jet Machining ◽  
Cutting Edge Preparation ◽  
Edge Preparation

Turning of Austempered Ductile Iron with ceramic tools

2020 ◽  
pp. 095440542095715 ◽  
Author(s):  
A Fernández-Valdivielso ◽  
LN López de Lacalle ◽  
P Fernández-Lucio ◽  
H González
Keyword(s):  
Heat Treatment ◽  
Tool Wear ◽  
Ductile Iron ◽  
High Strength ◽  
Cutting Parameters ◽  
Precise Determination ◽  
Machining Process ◽  
Austempered Ductile Iron ◽  
Machining Time ◽  
Ceramic Tools

Austempered ductile iron castings (ADI) are characterized by the high strength and resistance to fatigue, impact, and wear. ADI mechanical properties are obtained by performing a heat treatment on ductile iron casting. Thus, the so-called ausferrite microstructure is achieved. However, heat treatment significantly affects ductile casting machinability. A precise determination of ADI microstructure, on the one hand, and to choose correct machining process parameters and tool wear control on the other, are essential to optimize cutting processes and for the introduction of ceramic inserts. Ceramics are an alternative to carbide tools. In this paper, ceramic tools for the dry turning of ADI castings are studied. Thus, different technical ceramics were analyzed, identifying the dominant wear mechanism and evolution. Tool wear rate magnitude was determined indirectly by the variation of cutting force along machining time. Finally, different tests helped to study ceramics wear sensitivity with respect to cutting parameters. Mixed ceramics of Al2O3 with TiC showed the best performance, followed by SiAlON ones.

Edge Preparation on Cutting Force, Cutting Temperature and Tool Wear for Hard Turning

2014 ◽  
Vol 800-801 ◽  
pp. 424-429
Author(s):  
Pei Rong Zhang ◽  
Zhan Qiang Liu
Keyword(s):  
Tool Wear ◽  
Cutting Force ◽  
Hard Turning ◽  
Flank Wear ◽  
Cutting Temperature ◽  
Cutting Edge ◽  
Crater Wear ◽  
Cutting Edge Preparation ◽  
Flank Face ◽  
Edge Preparation

The paper investigates the effects of cutting edge preparation on cutting force, cutting temperature and tool wear for hard turning. An optimized characterization approach is proposed and five kinds of cemented tools with different edge preparation are adopted in the simulations by DEFROM-2DTM. The results show that both the forces and cutting temperature on the rake face climb up and then declines with the increasing of factor K (Sγ/Sα). While the temperature on flank face decrease with the increasing of the factor K. When the cutting conditions are identical, flank wear reduces while crater wear exacerbates before easing with the increasing of the factor K. The simulation results will provide valuable suggestions for optimization of cutting edge preparation for hard turning in order to obtain excellent machining quality and longer tool life.

Electro-polishing of tungsten carbide ball nose end mill to improve tool life

2015 ◽  
Vol 231 (4) ◽  
pp. 667-675 ◽  
Author(s):  
Ramesh Kuppuswamy ◽  
Kapui Mubita
Keyword(s):  
Tungsten Carbide ◽  
Tool Life ◽  
Surface Texture ◽  
Flank Wear ◽  
Electrolytic Cell ◽  
Cutting Edge ◽  
End Mill ◽  
End Mills ◽  
Cutting Edge Preparation ◽  
Edge Preparation

Electro-polishing was used as an alternative to mechanical polishing for the cutting edge preparation of tungsten carbide (WC) ball nose end mills. High-quality cutting edge surfaces with roughness of magnitude 0.3–0.35 µm was achieved using the electro-polishing process. A direct current of 0.96 A was passed through an electrolytic cell containing the electrolyte sodium hydroxide with a concentration—2.5 mol/dm3. The ball nose end mill was suspended as the anode and a stainless steel (SS304) as the cathode. The ball nose end mill was electro-polished using the optimized parameters which was obtained through performing the preliminary experiments on tungsten carbide coupons of size D6 × 20 mm. The effects of electro-polishing on the surface texture of the ball nose end mill were determined using surface texture examinations. Machining tests were conducted on Ti6Al4V alloy to understand the growth of flank wear on the electro-polished ball nose end mills. After every 5 m of cutting distance, flank wear measurements were done for both the regular ball nose end mill and the electro-polished ball nose end mills. The results revealed that the electro-polished ball nose end mill reached a flank wear of 0.15 mm after a cutting distance of 550 m. This was significantly more than the cutting distance of the standard ball nose end mill of magnitude 350 m for the same amount of flank wear. This showed an increase in tool life of over 50%.

Kantenpräparation durch Formschleifprozesse*/Cutting edge preparation by form grinding

2017 ◽  
Vol 107 (06) ◽  
pp. 453-460
Author(s):  
E. Prof. Uhlmann ◽  
J. Bruckhoff
Keyword(s):  
Tool Life ◽  
Cutting Tools ◽  
Cutting Edge ◽  
Grinding Processes ◽  
Form Grinding ◽  
Cutting Edge Preparation ◽  
Edge Preparation

Angesichts steigender Anforderungen an Zerspanwerkzeuge nimmt die Schneidkantenpräparation einen immer größer werdenden Stellenwert ein, da sich so die Standzeit von Zerspanwerkzeugen erhöhen lässt. Die bisher eingesetzten Präparationsverfahren eignen sich meist nur für einfache Verrundungen an der Schneidkante. In umfangreichen Untersuchungen wurde die Eignung von Formschleifprozessen zur Herstellung definierter Schneidkantenmikrogeometrien anhand von Arbeitsergebnissen analysiert.   Due to increasing demands on cutting tools cutting edge preparation has a high priority because it influences the tool life. Current cutting edge preparation processes can only generate simple roundings on the cutting edge. By extensive investigations the suitability of form grinding processes for the production of defined microgeometries on the cutting edge was analysed.

Sign in / Sign up

Export Citation Format

Share Document