scholarly journals The Tool Life and Coating-Substrate Adhesion of AlCrSiN-Coated Carbide Cutting Tools Prepared by LARC with Respect to the Edge Preparation and Surface Finishing

Micromachines ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 166 ◽  
Author(s):  
Tomáš Vopát ◽  
Martin Sahul ◽  
Marián Haršáni ◽  
Ondřej Vortel ◽  
Tomáš Zlámal
Keyword(s):  
Tool Life ◽  
Bias Voltage ◽  
Cutting Edge ◽  
Cemented Carbide ◽  
Surface Finishing ◽  
Cutting Edge Radius ◽  
Substrate Adhesion ◽  
Edge Radius ◽  
Coated Carbide ◽  
Edge Preparation

Nanocomposite AlCrSiN hard coatings were deposited on the cemented carbide substrates with a negative substrate bias voltage within the range of −80 to −120 V using the cathodic arc evaporation system. The effect of variation in the bias voltage on the coating-substrate adhesion and nanohardness was investigated. It was clear that if bias voltage increased, nanohardness increased in the range from −80 V to −120 V. The coating deposited at the bias voltage of −120 V had the highest nanohardness (37.7 ± 1.5 GPa). The samples were prepared by brushing and wet microblasting to finish a surface and prepare the required cutting edge radii for the tool life cutting tests and the coating adhesion observation. The indents after the static Mercedes indentation test were studied by scanning the electron microscope to evaluate the coating-substrate adhesion. The longer time of edge preparation with surface finishing led to a slight deterioration in the adhesion strength of the coating to the substrate. The tool wear of cemented carbide turning inserts was studied on the turning centre during the tool life cutting test. The tested workpiece material was austenitic stainless steel. The cemented carbide turning inserts with larger cutting edge radius were worn out faster during the machining. Meanwhile, the tool life increased when the cutting edge radius was smaller.

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.

Influence of cutting edge radius on tool life in milling inconel 718

2019 ◽  
Author(s):  
A. Celaya ◽  
O. Pereira ◽  
H. González ◽  
G. Gómez-Escudero ◽  
P. Fernández-Lucio ◽  
...  
Keyword(s):  
Tool Life ◽  
Inconel 718 ◽  
Cutting Edge ◽  
Cutting Edge Radius ◽  
Edge Radius

Research on ELID Grinding of Nano-Cemented Carbide Tool

2007 ◽  
Vol 329 ◽  
pp. 105-110 ◽  
Author(s):  
Fei Hu Zhang ◽  
J.C. Gui ◽  
Yi Zhi Liu ◽  
Hua Li Zhang
Keyword(s):  
Surface Quality ◽  
Cutting Edge ◽  
Cemented Carbide ◽  
Carbide Tool ◽  
Cutting Edge Radius ◽  
Elid Grinding ◽  
Edge Radius ◽  
Cemented Carbide Tool ◽  
Grinding Technique ◽  
Cemented Carbide Tools

Nano-cemented carbide is a novel material, which is superior to common cemented carbide on physical and mechanical properties, such as high hardness, toughness, flexural strength and higher wear resisting property. It is proposed to have wide application prospect to tools and mould manufacturing. In this paper, ELID grinding technique is applied to grind nano-cemented carbide tools. And the ground surface quality, cutting edge radius, and machinability of nano-cemented carbide tools are studied, compared with common cemented carbide. It is demonstrated by experimental results that nano-cemented carbide has higher grinding surface quality with less surface flaw than that of common cemented carbide. The cutting edge radius of nano-cemented carbide tool is less than that of common cemented carbide tool. Under the same conditions, the tool life of nano-cemented carbide is 1~2 times longer than that of common cemented carbide. The research results indicate that ELID grinding technique is suitable for grinding cemented carbide tools. Nano-cemented carbide tools have better machinability than common cemented carbide tools.

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.

Development and manufacturing of customized milling cutters for individual tool-making industry

2017 ◽  
Vol 1 (82) ◽  
pp. 26-32
Author(s):  
J. Kopač ◽  
F. Pušavec
Keyword(s):  
Tool Wear ◽  
Tool Life ◽  
End Milling ◽  
Tool Material ◽  
Rake Angle ◽  
Cutting Edge ◽  
Cutting Edge Radius ◽  
Edge Radius ◽  
Milling Tools ◽  
Material Cutting

Purpose: Purpose of this paper is to present results obtained during developing new cutting tools for individual tool industry. The aim of the research was to develop customized ball end milling tools with longer tool-life. Design/methodology/approach: to this study of development of new tools was over four successive sets of experiments, where the tool material, cutting edge preparation (cutting edge radius), rake angle and coating were selected for achieving longer tool-life. Tool-life was monitored over measuring tool wear on the flank face of the tool; maximum allowed tool wear was set to VB = 0.3 mm. Findings: of this study are showing that with right combination of the tool material, cutting edge radius, rake angle and appropriate coating, tool-life can be prolonged significant. Research (and practical) implications: implications are reflected in the substituting of all used milling tools from renowned manufacturers with these newly developed tools in this tool industry. Originality/value: of this paper is visible over significant improvement in tool-life of milling tools, especially for the company who will be using these tools in their production.

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