Improved efficiency of ceramic cutting tools in machining hardened steel—an application with nanostructured multilayered coatings

2021 ◽  
pp. 381-433
Author(s):  
S.N. Grigoriev ◽  
A.A. Vereschaka ◽  
M.A. Volosova ◽  
N.N. Sitnikov ◽  
E.S. Sotova ◽  
...  
Keyword(s):  
Cutting Tools ◽  
Hardened Steel ◽  
Multilayered Coatings

Mikrofräswerkzeuge mit Schneiden aus cBN*/Micro-cutting tools with cBN cutters

2018 ◽  
Vol 108 (11-12) ◽  
pp. 773-777
Author(s):  
E. Uhlmann ◽  
J. Polte ◽  
M. Polte ◽  
Y. Kuche ◽  
H. Wiesner
Keyword(s):  
Surface Roughness ◽  
Cubic Boron Nitride ◽  
Cutting Tools ◽  
High Strength ◽  
Hardened Steel ◽  
Micro Milling ◽  
Geometric Accuracy ◽  
Micro Cutting ◽  
Core Technology ◽  
Milling Tools

Die Mikrozerspanung ist eine Kerntechnologie bei der Fertigung von Mikrospritzgussformen. Die hohen Ansprüche an die geometrische Genauigkeit und Oberflächenrauheit erfordern den Einsatz hochfester Werkstoffe. Jedoch unterliegen aktuelle Fräswerkzeuge bei der Mikrozerspanung einem hohen Verschleiß. Einen Lösungsansatz bietet der erfolgreich in der Makrozerspanung eingesetzte Schneidstoff kubisch-kristallines Bornitrid (cBN). Ziel der Untersuchungen war es daher, detaillierte Informationen zur Bearbeitung von gehärtetem Stahl mit cBN-Mikrofräswerkzeugen bereitstellen zu können.   Micro-cutting is a core technology for producing micro-injection moulds. High demands on geometric accuracy and surface roughness require high-strength materials. However, current milling tools for micro-cutting suffer from excessiv tool wear. A solution is offered by cutting materials based on cubic Boron Nitride (cBN), which have been used successfully in macro-machining. This article contains detailed information on the machining of hardened steel with micro-milling tools and cutting edges made of cBN.

High Precision Cutting and High Speed Interrupted Cutting of Hardened Steel With PCBN Tools

1999 ◽  
Author(s):  
Katsuhito Yoshida ◽  
Satoru Kukino ◽  
Takashi Harada ◽  
Tomohiro Fukaya ◽  
Junichi Shiraishi ◽  
...  
Keyword(s):  
High Precision ◽  
High Speed ◽  
New Technologies ◽  
Cubic Boron Nitride ◽  
Cutting Tools ◽  
Hardened Steel ◽  
Precision Machining ◽  
Polycrystalline Cubic Boron Nitride ◽  
Interrupted Cutting ◽  
Pcbn Tools

Abstract PCBN (Polycrystalline Cubic Boron Nitride) cutting tools have become very familiar in the industries for cutting hardened steel parts and the demand for PCBN tools is growing rapidly. One of the reasons for this is the trend of replacing grinding processes with cutting. Although the trend of processing is to use more cutting, there still remains grinding in many processing fields. High precision machining and high speed interrupted machining have been such fields. In this study it has been verified that a novel cutting method can be applied to high precision machining with the smoothness of Rz 0.8 μm and that a new PCBN has sufficient reliability against tool failure in high speed (< 250m/min) interrupted cutting. Thus cutting has become applicable to those machining and the trend of replacement of grinding with cutting will be enhanced. Those new technologies will be introduced in this report.

Analysis of Surface Roughness and Wear Mechanism when Cutting Hardened Steel Rolls

2018 ◽  
Vol 777 ◽  
pp. 393-396
Author(s):  
Xin Yu Song ◽  
Guo Chen Du
Keyword(s):  
Surface Roughness ◽  
Steel Industry ◽  
Cutting Tools ◽  
Hardened Steel ◽  
Cutting Fluid ◽  
Workpiece Surface ◽  
Ceramic Tools ◽  
Low Efficiency ◽  
Almost All ◽  
Steel Rolls

In modern steel industry, hardened steel rolls are very important tools. The increase of the automobile and the mould keeps the amount of rolls increases fairly quickly. In cutting process, hardened rolls are very difficult to turn or mill, there for, almost all hardened rolls are cut only by grinding, which causes low efficiency, besides in grinding process and a lot of cutting fluid are used. In this paper, surface roughness of workpiece was analyzed of the ceramic tools in different cutting conditions. Wear machanism of crack and abrasive of cutting tools were also analyzed. The experimental and theoretical analysis confirmed that when the ceramic tools cutting cold rolls, the generation and expansion of the cracks the most important role that affect tool life and workpiece surface roughness.

scholarly journals Cutting Tools Made of Layered Composite Ceramics with Nano-Scale Multilayered Coatings

Procedia CIRP ◽  
2012 ◽  
Vol 1 ◽  
pp. 301-306 ◽  
Author(s):  
Sergej N. Grigoriev ◽  
A.A. Vereschaka ◽  
A.S. Vereschaka ◽  
A.A. Kutin
Keyword(s):  
Cutting Tools ◽  
Layered Composite ◽  
Composite Ceramics ◽  
Multilayered Coatings ◽  
Nano Scale

Hardened Steel Turning by Means of Modern CBN Cutting Tools

2013 ◽  
Vol 581 ◽  
pp. 188-193 ◽  
Author(s):  
Łukasz Ślusarczyk ◽  
Grzegorz Struzikiewicz
Keyword(s):  
Cutting Tool ◽  
Cutting Tools ◽  
Tool Material ◽  
Chip Morphology ◽  
Cutting Parameters ◽  
Hardened Steel ◽  
Cutting Depth ◽  
Cutting Rate ◽  
Steel Turning ◽  
The Impact

The paper presents an analysis of the impact of cutting parameters such as cutting rate, feed rate, cutting depth and cutting tool material grade for surface roughness, the components of the total cutting force and chip morphology. We analysed the process of rolling 145Cr steel with a hardness of 55HRC with Wiper type tools with different percentage of CBN. The results and conclusions were presented.

Research of Technology of Cutting Hardened Steel in HSM

2011 ◽  
Vol 338 ◽  
pp. 701-705
Author(s):  
Xiao Jun Zhu ◽  
Wen Sheng Xia
Keyword(s):  
High Speed ◽  
Cubic Boron Nitride ◽  
Cutting Tools ◽  
Tool Material ◽  
Main Tool ◽  
Hardened Steel ◽  
Detection Methods ◽  
Tool Geometry ◽  
High Speed Milling ◽  
Coated Cemented Carbide

The key technology of the cutter that cutting hardened steel was researched by high speed milling machining method. At first ,three cutting elements of high speed milling machining was narratived, and we can obtain the principle of selection of parameters of cutting velocity, feed per tooth, longitudinal cutting depth and cutting width of axial, etc. With HSM ,we discussed the performance and selection points of tool material of coated cemented carbide, ceramic, cubic boron nitride , synthetic diamond and so on, and obtained the effect of the main tool geometry for the cutting process in HSM. The second, it analysised type and reason of damage of high speed cutting tools, and introduced three detection methods of tools. Finally, it was summarized and concluded.

Edge Sharpening and Surface Modification of PcBN Cutting Tool by Pulsed Laser Grinding

2012 ◽  
Vol 523-524 ◽  
pp. 131-136 ◽  
Author(s):  
Daisuke Suzuki ◽  
Fumihiro Itoigawa ◽  
Keiich Kawata ◽  
Tetsuro Suganuma ◽  
Takashi Nakamura
Keyword(s):  
Surface Modification ◽  
High Precision ◽  
Chemical Reactivity ◽  
Cutting Tools ◽  
Pulsed Laser ◽  
Tool Material ◽  
Lateral Force ◽  
Hardened Steel ◽  
Rake Face ◽  
Diamond Grinding

PcBN cutting tools have excellent characteristics such as high degree of hardness and low chemical reactivity, so they have potential to replace high precision grinding of hardened steel with high precision cutting. PcBN might be more efficient tool material if improvement in formability, and good surface modification can be achieved. In order to solve these problems, Pulsed Laser Grinding (PLG) is applied to a shape cutting edge and to finish a rake face. After processing by the PLG, shaped cutting edges were observed with a scanning electron microscope (SEM) and measured with contact- type profilometer. As a result, cutting edges processed by the PLG are similar or shaper than that by conventional diamond grinding. In addition, as a one of effects of surface modification, The Vickers microhardness of rake faces increases by about 10 present after PLG. On the other hand, according to frictional test with lateral force microscopy, the coefficient of friction of rake face decreases by half of ordinary surface. Depending on these advantages of PLG, high precision turning of hardened steel with 58HRC in hardness by use of the tool processed by PLG can demonstrate good performance rather than a commercial tool with diamond grinding finish.

Possibilities of the Generation of Hardened Steel Parts With Defined Topographic Characteristics of the Machined Surfaces

2015 ◽  
Vol 137 (1) ◽  
Author(s):  
Wit Grzesik ◽  
Krzysztof Żak
Keyword(s):  
Hard Turning ◽  
Cubic Boron Nitride ◽  
Cutting Tools ◽  
Roughness Parameter ◽  
Hardened Steel ◽  
Roughness Parameters ◽  
Turning Operations ◽  
Topographic Characteristics ◽  
Grinding Operations ◽  
Hard Cutting

The main objective of the comparison of precision hard cutting and abrasive processes in terms of the surface texture is to facilitate the decision whether to possibly replace grinding operations by hard turning with low feed rates. In this study, hard turning operations with Cubic Boron Nitride (CBN) cutting tools and grinding operations using electrocorundum Al2O3 and CBN wheels were performed in order to generate surfaces with the Sa roughness parameter of about 0.2 μm. 3D roughness parameters and the frequency, fractal and motif characteristics were analyzed.

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