scholarly journals Influence of the Material Properties on Microgrooving u sing Wire Tools Electrodeposited with Diamond Grains

2021 ◽  
Vol 11 (1) ◽  
pp. 155-161
Author(s):  
Masaya Gemma ◽  
◽  
Jiayu Liu ◽  
Satoshi Sakamoto ◽  
◽  
...  
Keyword(s):  
Material Properties ◽  
Brittle Materials ◽  
Groove Depth ◽  
Metallic Materials ◽  
Machining Time ◽  
Hard Materials ◽  
Grinding Ratio ◽  
Work Material ◽  
Hard And Brittle Materials ◽  
The Wire

In this study, the main objective is to clarify the relationship between the material properties of the work material and the grooving properties for various work materials from hard and brittle materials to metallic materials. In this paper, in order to investigate the grinding characteristics of diamond electroplated wire tools, including the wear characteristics, we conducted grooving experiments with borosilicate glass (Pyrex), which is a kind of hard and brittle material, and aluminum alloy (A5052), and tough pitch copper (C1100), a kind of metallic material, using diamond electroplated wire tools in a work material rotation method. As a result of the grooving experiments, it was clarified that the grooving characteristics of the work materials were influenced by the hardness and brittle behavior of the materials. The groove depth is influenced by the hardness and brittleness behavior of the material. When machining hard materials, the groove depth increases slowly in the initial stage of machining due to the poor bite of the wire tool, but increases rapidly as the machining progresses. On the other hand, the groove width does not depend on the machining time or speed, but is influenced by the hardness of the material and the ease with which plastic deformation occurs. The wear of the wire tool is also influenced by the hardness and brittleness of the material. In the machining of hard materials, the wear caused by stray wire and vibration in the early stages of machining was significant. The grinding ratio calculated from the ratio of the groove depth to the amount of grinding has a very different trend for hard and brittle materials and metallic materials. In the machining of hard and brittle materials, the amount of machining increased rapidly as machining progressed, so the grinding ratio also increased, but in metallic materials, the amount of machining itself was small and the grinding ratio did not increase. For A5052, the grinding ratio tended to decrease as machining progressed. Future work In the future, it is necessary to clarify the machining conditions to reduce the wear caused by stray wire tools and vibration during the initial machining of hard materials.

The Wear Characteristics of a Wire Tool in the Microgrooving of Ceramics

2016 ◽  
Vol 719 ◽  
pp. 132-136 ◽  
Author(s):  
Satoshi Sakamoto ◽  
Keitoku Hayashi ◽  
Masaya Gemma ◽  
Yasuo Kondo ◽  
Kenji Yamaguchi ◽  
...  
Keyword(s):  
Magnetic Materials ◽  
Relative Velocity ◽  
Brittle Materials ◽  
Groove Depth ◽  
Alumina Ceramics ◽  
Machining Time ◽  
Wear Characteristics ◽  
Hard And Brittle Materials ◽  
The Wire

A wire tool having electrodeposited diamond grains is frequently used for machining hard and brittle materials such as silicon ingots, magnetic materials, ceramics, and sapphires. This study aims to examine the wear characteristics of the tool during the microgrooving of ceramics. We conducted microgrooving experiments for alumina ceramics. The results indicate that the grooving time and the machining distance influence the groove depth. However, as the damage in a wire tool progresses, the groove depth does not depend on the machining distance. A fast relative velocity leads to serious damage in the wire tool even when the machining time is short. In the case of wet grooving, the damage to the wire tool was smaller than that in the case of dry grooving.

scholarly journals Extremely Thin Metal Foil Blades as Cutting Tools for Hard and Brittle Materials

2018 ◽  
Vol 221 ◽  
pp. 04006
Author(s):  
Satoshi Sakamoto ◽  
Sanshiro Akaoka ◽  
Masaya Gemma ◽  
Yasuo Kondo ◽  
Kenji Yamaguchi ◽  
...  
Keyword(s):  
Particle Size ◽  
Abrasive Particle ◽  
Brittle Materials ◽  
Groove Depth ◽  
Thin Metal ◽  
Metal Foil ◽  
Machining Time ◽  
Blade Thickness ◽  
Hard And Brittle Materials ◽  
Thin Metal Foil

The manufacturing costs of semiconductor products such as silicon wafers can be reduced by decreasing the kerf loss. In addition, a decrease in the kerf loss leads to an effective utilization of rare materials, which is environmentally beneficial from the viewpoint of saving resources. This study aims to reduce the kerf loss during slicing hard and brittle materials. Therefore, the possibility of using an extremely thin metal foil blade instead of a wire tool in slicing was examined. Initially, grooving characteristics using a metal foil blade (thickness: 50 μm or less) was investigated. The main conclusions are that grooving with a metal foil blade is possible and kerf loss can be reduced. The groove depth tends to increase as the machining time and particle size of abrasives increase. The groove width is smaller when a thin metal foil blade is used and vice versa. However, if the abrasive particle size is too large, grooving becomes impossible. Since the wear of metal foil blade increases with an increase in the particle size of the abrasive, it is necessary to use an abrasive with a particle size that is suitable for the thickness of the metal foil blade.

Influence of the Brittle Behavior of Work Materials on Microgrooving

2016 ◽  
Vol 703 ◽  
pp. 17-21 ◽  
Author(s):  
Satoshi Sakamoto ◽  
Masaya Gemma ◽  
Keitoku Hayashi ◽  
Yasuo Kondo ◽  
Kenji Yamaguchi ◽  
...  
Keyword(s):  
Tool Wear ◽  
Material Properties ◽  
Relative Velocity ◽  
Processing Time ◽  
Groove Depth ◽  
Processing Conditions ◽  
Processing Efficiency ◽  
Brittle Behavior ◽  
Work Material ◽  
Hard And Brittle Materials

An electroplated diamond wire tool is frequently used for the machining of hard and brittle materials such as silicon ingots, magnetic materials, ceramics, and sapphires. This study aims to examine the influence of brittle behavior of work materials on machinability (including tool wear); therefore, we conduct dynamic ultramicro hardness measurements and microgrooving experiments for three types of ceramics. The results indicate that the groove depth of a work material tends to increase with the processing time. Moreover, material properties of a work material, such as hardness and toughness, have a significant impact on the fluctuations in its groove depth. However, kerf width of a work material does not depend on the processing conditions and material properties. In addition, a faster relative velocity improves processing efficiency but also increases tool wear.

scholarly journals Influence of the Characteristics of a Workpiece on the Slicing Characteristics Including Tool Wear

2018 ◽  
Vol 221 ◽  
pp. 04005
Author(s):  
Satoshi Sakamoto ◽  
Masaya Gemma ◽  
Yasuo Kondo ◽  
Kenji Yamaguchi ◽  
Mitsugu Yamaguchi ◽  
...  
Keyword(s):  
Tool Wear ◽  
Material Properties ◽  
Brittle Materials ◽  
Thickness Variation ◽  
Workpiece Material ◽  
Tool Performance ◽  
Hard And Brittle Materials ◽  
The Wire

Multi-wire saws with a diamond electrodeposited wire tool are widely used to slice hard and brittle materials. The properties of the materials significantly affect the saw’s performance in terms of slicing quality, efficiency, and accuracy. In this study, the effects of the material properties of workpieces on wire tool performance and tool wear are described. The main conclusions are as follows: the higher the hardness and toughness of the workpiece material, the longer the slicing time and greater the damage to the wire tool. The brittleness of the workpiece adversely affects the thickness variation more than its hardness. In addition, the frequency of chipping mainly depends on the hardness of the workpiece, whereas the chipping size mainly depends on the toughness of the workpiece.

Micro Pattern Making Method on AlN-hBN Composites Using Powder Blasting Process

2008 ◽  
Vol 368-372 ◽  
pp. 943-946
Author(s):  
Si Young Beck ◽  
Jung Won Lee ◽  
Myeong Woo Cho ◽  
Dong Sam Park ◽  
Ho Su Jang ◽  
...  
Keyword(s):  
Material Properties ◽  
Brittle Materials ◽  
Experimental Results ◽  
Micro Machining ◽  
Powder Blasting ◽  
Micro Pattern ◽  
Hard And Brittle Materials ◽  
Micro Patterns

In this study, micro patterns were formed on the developed AlN-hBN composites using powder blasting techniques, which have been considered as one of the most appropriate micro machining methods for hard and brittle materials such as ceramics. To achieve the objective, first, material properties of the developed AlN-hBN composites were evaluated according to the variation of h-BN contents. And, a series of required experiments were performed, and the results were analyzed. As the results, it was investigated that the machiniability of the developed AlN-hBN composites increased with the increase of the h-BN contents in the composites. From the experimental results, it was possible to determine optimum blasting conditions for micro pattern making on the developed AlN-hBN composites.

scholarly journals Rotary Ultrasonic Machining of Poly-Crystalline Cubic Boron Nitride

2014 ◽  
Vol 22 (341) ◽  
pp. 103-108
Author(s):  
Marcel Kuruc ◽  
Jozef Peterka
Keyword(s):  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Brittle Materials ◽  
Active Part ◽  
Ultrasonic Machining ◽  
Rotary Ultrasonic Machining ◽  
Hard Materials ◽  
Hard And Brittle Materials ◽  
Advanced Machining ◽  
Conventional Machining

Abstract Poly-crystalline cubic boron nitride (PCBN) is one of the hardest material. Generally, so hard materials could not be machined by conventional machining methods. Therefore, for this purpose, advanced machining methods have been designed. Rotary ultrasonic machining (RUM) is included among them. RUM is based on abrasive removing mechanism of ultrasonic vibrating diamond particles, which are bonded on active part of rotating tool. It is suitable especially for machining hard and brittle materials (such as glass and ceramics). This contribution investigates this advanced machining method during machining of PCBN.

scholarly journals Nanoengineering in biomedicine: Current development and future perspectives

2020 ◽  
Vol 9 (1) ◽  
pp. 700-715 ◽  
Author(s):  
Wei Jian ◽  
David Hui ◽  
Denvid Lau
Keyword(s):  
Molecular Dynamics ◽  
Research And Development ◽  
Molecular Dynamics Simulations ◽  
Material Properties ◽  
Biomedical Applications ◽  
Metallic Materials ◽  
Future Perspectives ◽  
Current Development ◽  
Materials Used ◽  
Dynamics Simulations

AbstractRecent advances in biomedicine largely rely on the development in nanoengineering. As the access to unique properties in biomaterials is not readily available from traditional techniques, the nanoengineering becomes an effective approach for research and development, by which the performance as well as the functionalities of biomaterials has been greatly improved and enriched. This review focuses on the main materials used in biomedicine, including metallic materials, polymers, and nanocomposites, as well as the major applications of nanoengineering in developing biomedical treatments and techniques. Research that provides an in-depth understanding of material properties and efficient enhancement of material performance using molecular dynamics simulations from the nanoengineering perspective are discussed. The advanced techniques which facilitate nanoengineering in biomedical applications are also presented to inspire further improvement in the future. Furthermore, the potential challenges of nanoengineering in biomedicine are evaluated by summarizing concerned issues and possible solutions.

scholarly journals Experimental investigation of the machining characteristics in diamond wire sawing of unidirectional CFRP

2021 ◽  
Author(s):  
Lukas Seeholzer ◽  
Stefan Süssmaier ◽  
Fabian Kneubühler ◽  
Konrad Wegener
Keyword(s):  
Surface Quality ◽  
Influencing Factors ◽  
Material Properties ◽  
High Surface ◽  
Workpiece Surface ◽  
High Surface Quality ◽  
High Productivity ◽  
Surface Temperatures ◽  
Process Forces ◽  
The Wire

AbstractEspecially for slicing hard and brittle materials, wire sawing with electroplated diamond wires is widely used since it combines a high surface quality with a minimum kerf loss. Furthermore, it allows a high productivity by machining multiple workpieces simultaneously. During the machining operation, the wire/workpiece interaction and thus the material removal conditions with the resulting workpiece quality are determined by the material properties and the process and tool parameters. However, applied to machining of carbon fibre reinforced polymers (CFRP), the process complexity potentially increases due to the anisotropic material properties, the elastic spring back potential of the material, and the distinct mechanical wear due to the highly abrasive carbon fibres. Therefore, this experimental study analyses different combinations of influencing factors with respect to process forces, workpiece surface temperatures at the wire entrance, and the surface quality in wire sawing unidirectional CFRP material. As main influencing factors, the cutting and feed speeds, the density of diamond grains on the wire, the workpiece thickness, and the fibre orientation of the CFRP material are analysed and discussed. For the tested parameter settings, it is found that while the influence of the grain density is negligible, workpiece thickness, cutting and feed speeds affect the process substantially. In addition, higher process forces and workpiece surface temperatures do not necessarily deteriorate the surface quality.

Werkzeuge der ultraschallunterstützten Bearbeitung*/Modelling of an Actorsystem - Development of a tool for ultrasonic assisted machining with an axial-tangential vibration vector

2018 ◽  
Vol 108 (01-02) ◽  
pp. 53-57
Author(s):  
K. Drewle ◽  
T. Stehle ◽  
H: Möhring
Keyword(s):  
Contact Zone ◽  
Brittle Materials ◽  
Wird Eine ◽  
Alternative Method ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Machining ◽  
Hard And Brittle Materials ◽  
Feed Axis

Die schwingungsunterstützte Bearbeitung hat sich bereits bei der Zerspanung von hartspröden Werkstoffen mit einer einachsigen Schwingung in der Kontaktzone bewährt. Untersuchungen zu schwingungsunterstützten Bohrprozessen beschränken sich bisher auf eine Schwingungserzeugung, die entlang der Vorschubachse ausgerichtet ist. Für alternative Schwingungsrichtungen fehlt in erster Linie die geeignete Aktorik. In diesem Beitrag wird eine alternative Methode zur Erzeugung einer axial-tangentialen Schwingung in der Kontaktzone untersucht.   Ultrasonic assisted machining with uniaxial vibration is a well-proven process for machining hard and brittle materials. Existing investigations of vibration assisted drilling and boring processes so far are limited to an oscillation along the feed axis, which primarily due to nonexistent actuators. This contribution will present investigations into an alternative method for creating axial-tangential vibrations in the tool contact zone.

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