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.

Standzeitoptimierung von Kreissägewerkzeugen/Optimization of the tool life of circular saw blades

2021 ◽  
Vol 111 (11-12) ◽  
pp. 833-839
Author(s):  
Kolb Moritz ◽  
Tim Mayer ◽  
Nico Rasenberger
Keyword(s):  
Service Life ◽  
Tool Life ◽  
Model Test ◽  
Wear Behavior ◽  
Cutting Edge ◽  
Circular Saw ◽  
Single Tooth ◽  
Cutting Edge Preparation ◽  
Saw Blade ◽  
Edge Preparation

Dieser Beitrag beschreibt, wie sich die Standzeit von Kreissägeblättern durch Schneidkantenpräparation gezielt beeinflussen lässt. Hierfür wurden zunächst einzelne Segmente aus einem Sägeblatt herausgetrennt und Einzahnproben mit variierenden Schneidenmikrogeometrien mittels Bürstspanen präpariert. Anschließend wurde das Einsatz- und Verschleißverhalten der zuvor hergestellten Proben in einem Kreissäge-Modellversuch untersucht.   This article describes how the service life of circular saw blades can be specifically influenced by cutting edge preparation. For this purpose, individual segments were first cut out of a saw blade. These single-tooth specimens with varying cutting edge microgeometries were prepared by abrasive brushing. Then the usage and wear behavior of the previously produced samples was investigated in a circular saw model test.

scholarly journals Reamers cutting edge preparation for improvement the GGG 40 machining

2018 ◽  
Vol 178 ◽  
pp. 01014
Author(s):  
Ioan-Doru Voina ◽  
Stefan Sattel ◽  
Glad Contiu ◽  
Adrian Faur ◽  
Bogdan Luca
Keyword(s):  
Wear Resistance ◽  
Coating Layer ◽  
Cutting Tools ◽  
Cutting Edge ◽  
Abrasive Jet Machining ◽  
Edge Wear ◽  
Solid Carbide ◽  
Cutting Edge Preparation ◽  
Machining Strategies ◽  
Edge Preparation

The improvement of the microgeometry became a subject of a great interest in cutting tools optimization. This paper approaches the process of cutting edge preparation of solid carbide reamers. It has been analyzed the evolution of cutting edge wear resistance in the material GGG 40 using the scanning electron microscope (SEM). The work also compared the rounded cutting edge reamers realized using wet abrasive jet machining with standard unprepared cutting edge. To obtain different microgeometries were experienced a number of machining strategies, which resulted in four combinations of roundness and forms for the cutting edge. In order to validate the results, the author studied the wear resistance during the reaming tests, the influence of prepared surface of the cutting edge on metallic coating layer adhesion. The final purpose was to determinate the optimal strategy of cutting edge preparation considering the evolution of wear during the reaming process.

Cutting edge preparation of cutting tools using plasma discharges in electrolyte

2019 ◽  
Vol 46 ◽  
pp. 234-240 ◽  
Author(s):  
Tomáš Vopát ◽  
Štefan Podhorský ◽  
Martin Sahul ◽  
Marián Haršáni
Keyword(s):  
Cutting Tools ◽  
Cutting Edge ◽  
Plasma Discharges ◽  
Cutting Edge Preparation ◽  
Edge Preparation

Influence of Edge Preparation on Cutting Tool Wear

2012 ◽  
Vol 201-202 ◽  
pp. 1178-1181
Author(s):  
Guo Bing Chai ◽  
Wei Wang ◽  
Ai Bing Yu
Keyword(s):  
Tool Wear ◽  
Tool Life ◽  
Cutting Tool ◽  
Impact Resistance ◽  
Cutting Tools ◽  
Medium Carbon Steel ◽  
Cutting Edge ◽  
Cutting Tool Wear ◽  
Edge Radius ◽  
Edge Preparation

Edge preparation is not only the process of grinding proper geometry of cutting edge or removing micro-cracks on cutting edge region, but also a way of improving cutting tool life. In this study, cutting models with different cutting edge radius were set up with FEM software. Medium carbon steel cutting tests were carried out using cutting tools with different edge radius. Cutting tool wear was simulated and measured for comparison. The simulation results show that edge radius has influences on tool wear. Tool cutting behavior is concerned with edge radius. A proper edge radius will improve the tool life. The experimental results show that proper edge preparation could improve tool impact resistance capability and reduce tool wear. The cutting tool life can be prolonged with suitable edge preparation. Edge preparation can improve cutting performance of cutting tool.

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%.

Flakkotieren von Fräsern zum Mikro-Hartfräsen/Flakkoting of milling tools for hard milling- Improvement of the performance of micro milling tools in hard milling by high precision brushing

2019 ◽  
Vol 109 (11-12) ◽  
pp. 833-839
Author(s):  
P. Frank ◽  
A. Otto
Keyword(s):  
High Precision ◽  
Tool Life ◽  
Cutting Edge ◽  
Micro Milling ◽  
Initial State ◽  
Hard Milling ◽  
Cutting Edge Preparation ◽  
Technical University ◽  
Milling Tools ◽  
Edge Preparation

Die nachfolgende Studie ist an der Technischen Hochschule Georg Agricola zu Bochum entstanden. Sie gibt einen Überblick über die Grundlagen, Anwendungen und Möglichkeiten der Werkzeugoptimierung und somit der Standzeiterhöhung mithilfe des Hochpräzisionsbürstens (Flakkotieren) an Mikrotorusfräsern. Ein Abgleich von verschiedenen präparierten und sich im Ausgangszustand befindlichen Mikrofräsern sollen hierbei die Möglichkeiten und Grenzen der Schneidkantenpräparation aufzeigen.   The following study was carried out at the Technical University Georg Agricola in Bochum. It provides an overview of the basics, applications and opportunities for improving tools and thus for increasing tool life with the aid of high-precision brushing (flakkoting) on milling tools for hard milling. Comparing a number of prepared micro milling cutters in their initial state, it demonstrates the opportunities and limits of cutting edge preparation.

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.

Design for Manufacturing of Variable Microgeometry Cutting Tools

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
N. Z. Yussefian ◽  
A. Hosseini ◽  
K. Hosseinkhani ◽  
H. A. Kishawy
Keyword(s):  
Tool Life ◽  
Wedge Angle ◽  
Cutting Tools ◽  
Cutting Edge ◽  
Machining Process ◽  
Valuable Insight ◽  
Machining Parameters ◽  
Workpiece Surface ◽  
Coated Carbide ◽  
Edge Preparation

Cutting edge microgeometry has gained special attention of late in the machining research community. Machine tool vibration, tool life, and workpiece surface integrity are all influenced by cutting edge size/shape. To optimize the machining process, variable microgeometry (VMG) cutting tools, in which the edge microgeometry varies along the edgeline with respect to specific variables (such as machining parameters or expected tool wear), are manufactured. Despite the advantages of VMG tools, a major hindrance in their development is the manufacturing complexity that demands high precision multi-axis edge preparation processes following extensive machine setup, fixturing, and programming. This paper details the proof of concept of a design criterion, which leads to the manufacturing of VMG cutting tools by only traditional edge preparation processes. The present method relies on the existing relationship between the edge radius subsequent to the edge preparation process and the tool wedge angle. The validity of the proposed method is first examined by a numerical simulation of the edge preparation. Carbide cutting tool inserts are then designed based on the proposed idea. Robust VMG generation subsequent to edge preparation by microblasting is demonstrated through microgeometric measurements. VMG chemical vapor deposition-coated carbide tools manufactured by the proposed approach are evaluated for turning hardened steel, and optimal designs are identified with respect to tool life and workpiece surface roughness. To address the design consideration, finite element (FE) modeling provides valuable insight into the machining process. FE modeled stress and temperature distribution clarify the experimental observations and reveal the design constraints.

Cutting Edge Preparation by Means of Abrasive Brushing

2010 ◽  
Vol 438 ◽  
pp. 1-7 ◽  
Author(s):  
Berend Denkena ◽  
Luis de Leon ◽  
E. Bassett ◽  
M. Rehe
Keyword(s):  
Tool Life ◽  
Cutting Tool ◽  
Market Competition ◽  
Cutting Edge ◽  
Production Costs ◽  
Tool Performance ◽  
Process Reliability ◽  
Cutting Edge Preparation ◽  
Edge Preparation

The need for new cutting tool technologies is driven by the constantly increasing performance of machine tools and the rising market competition. Current research results show that an improved combination of the cutting edge macro- and microgeometry, together with an appropriate substrate and coating, leads to a significant enhancement of cutting tool performance. Furthermore, inappropriate cutting edge microgeometries cause, in addition to the higher production costs, a reduction of the tool life. Hence, it is essential to produce tailored cutting edge microgeometries with high precision and process reliability. This paper presents the influence of brushing process parameters on the size and the form of produced cutting edges of indexable inserts. This leads to a better understanding and higher quality of the cutting edge preparation process by means of abrasive brushes. Furthermore, the process reliability of 5-axes brushing is analyzed. An example of a tool life map presents the significantly enhanced tool performance through cutting edge preparation and its sensitivity towards varying the cutting edge microgeometry.

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