Peculiarities of tool material wear at polymeric composite blank cutting

2018 ◽  
Vol 2018 (7) ◽  
pp. 27-31
Author(s):  
Юрий Зубарев ◽  
Yuriy Zubarev ◽  
Александр Приемышев ◽  
Alexsandr Priyomyshev
Keyword(s):  
Tool Wear ◽  
Tool Material ◽  
Polymeric Composite ◽  
Physical Models ◽  
Technological Parameters ◽  
Tool Materials ◽  
Materials Used ◽  
The Impact ◽  
Material Wear

Tool materials used for polymeric composite blank machining, kinds of tool material wear arising at machining these blanks, and also the impact of technological parameters upon tool wear are considered. The obtained results allow estimating the potentialities of physical models at polymeric composite blanks cutting.

scholarly journals Polymeric composite processing with blade tool

2019 ◽  
Vol 2019 (3) ◽  
pp. 27-31
Author(s):  
Юрий Зубарев ◽  
Yuriy Zubarev ◽  
Александр Приемышев ◽  
Alexsandr Priyomyshev
Keyword(s):  
Processing Time ◽  
Polymeric Composite ◽  
Composite Processing ◽  
Efficient Tool ◽  
Tool Materials ◽  
The Impact ◽  
Plate Geometry

Investigation results on the impact of processing time and a cutting way upon wear a cutter made of different tool materials at the machining of polymeric composite blanks are shown. There are given recommendations on cutter plate geometry of a tool and the most efficient tool materials.

Copper wire bonding ready for industrial mass production

2015 ◽  
Vol 2015 (1) ◽  
pp. 000399-000405 ◽  
Author(s):  
M. Brökelmann ◽  
D. Siepe ◽  
M. Hunstig ◽  
M. McKeown ◽  
K. Oftebro
Keyword(s):  
Tool Wear ◽  
Copper Wire ◽  
Tool Material ◽  
Wire Bonding ◽  
Bond Quality ◽  
Process Data ◽  
Power Semiconductors ◽  
Bonding Parameters ◽  
Copper Wire Bonding ◽  
The Impact

Copper wire as a bonding material for the top side connection of power semiconductors is highly desired. One current drawback in heavy copper wire bonding is the relatively low lifetime of the consumables. The bonding tool wear mechanisms and the corresponding factors are investigated. To reduce wear, different approaches are tested in long-term bonding tests. Optimized bonding tool tip geometry and tool material are two of these factors. Optimized bonding parameters were investigated as well and show a significant improvement in bonding tool lifetime. Wear and lifetime of the cutter and the wire guide are also examined. Additionally, the impact of bonding tool wear on different aspects of bond quality is addressed. It is also shown how wear can be monitored by machine process data recording and how a derived signal correlates to the actual wear status. These major advances in heavy copper wire bonding now make it a robust, reliable and efficient interconnection technology.

Tool Materials for Turning Machine-Building Stainless Steel 09Kh17N7Yu

2021 ◽  
pp. 27-33
Author(s):  
B.Y. Mokritskiy ◽  
E.S. Sitamov
Keyword(s):  
Stainless Steel ◽  
Tool Wear ◽  
High Performance ◽  
Metal Cutting ◽  
Operating Time ◽  
Tool Material ◽  
Machine Building ◽  
Operating Conditions ◽  
Software Environment ◽  
Tool Materials

Hard-to-process specialized stainless steel grade 09Kh17N7Yu has become widely used in various fields of mechanical engineering due to its unique performance properties. The existing recommendations for its processing are outdated and do not meet modern requirements for the performance of metal-cutting tools. This necessitated the need to develop recommendations for modern high-performance machine tools. The paper presents methods of solving this problem based on the example of turning by typical domestic replaceable hard-alloyed cutting plates. Relationships between the tool wear and the operating time were obtained. Design solutions for tool materials to be used under specified operating conditions were developed. A significant outcome of the paper was the use of simulation modeling in the Deform software environment, which allowed the authors to develop new coatings for the hard alloy VK8, which provided a significant (up to 3 times) increase in tool life. Using modelling, it was also possible to design new tool materials for new or expected operating conditions. The following main criteria sufficient for modeling were identified: tool wear, temperature in the cutting zone, stresses in the tool material and deformation of the tool material. The results obtained can be used as the basis for the so-called data bank, which can be used in production enterprises.

Research on the Cutting of High Nitrogen Austenitic Stainless Steel

2010 ◽  
Vol 156-157 ◽  
pp. 943-947
Author(s):  
Xue Hui Pang ◽  
Xiao Yan Zhang
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Tool Wear ◽  
Adhesive Wear ◽  
Cutting Speed ◽  
High Nitrogen ◽  
Technological Parameters ◽  
Machine Material ◽  
Tool Materials ◽  
Speed Range

The high nitrogen austenitic stainless steel is a kind of difficult-to-machine material. On the basis of material properties analysis, and through comparison test of tool wear resistance, this article made a study on the typical wear & breakage patterns and wears mechanism of insert during the cutting process, and made an analysis on the affection of the mechanical properties of tool materials of various brands to the cutting technological parameters. The results show that the tool wear and breakage are mainly expressed as adhesive wear of rake face and micro chipping of end cutting edge. Compared with the other inserts, YG8 has the best property and a longest life span within the 50~75 m /min cutting speed range.

ASSESSMENT OF TRIBOLOGICAL PROPERTIES OF POLYMERS USED IN ADDITIVE TECHNOLOGIES SLS AND PJM

Tribologia ◽  
2016 ◽  
Vol 269 (5) ◽  
pp. 73-84 ◽  
Author(s):  
Tomasz KOZIOR ◽  
Czesław KUNDERA
Keyword(s):  
Tribological Properties ◽  
Selective Laser Sintering ◽  
Additive Technologies ◽  
Technological Parameters ◽  
Polymer Resin ◽  
Machine Parts ◽  
Materials Used ◽  
Photo Curing ◽  
The Impact ◽  
Printing Direction

The paper presents preliminary results of tribological research on materials used in two additive technologies photo-curing polymer resin PJM and selective laser sintering of polyamide powders SLS. A Tribometer T-15 type ring-disk was used to determine the impact of technological parameters, e.g., printing direction and building layer thickness on the selected tribological properties and wear processes for elements generally used as machine parts.

Hardening coatings of tool materials for turning of stainless steels

2021 ◽  
pp. 7-10
Author(s):  
B.Ya. Mokritsky
Keyword(s):  
Experimental Data ◽  
Computer Simulation ◽  
Tool Wear ◽  
Tool Life ◽  
Stainless Steels ◽  
Tool Material ◽  
Software Environment ◽  
Tool Materials ◽  
Hardening Coatings ◽  
Cutting Zone

The results of new tool materials designing for processing of stainless steels are presented, which allowed to increase the tool life up to 3 times. The studies are carried out with the integrated use of experimental data and computer simulation in the Deform software environment. The criteria by which modeling is feasible at sufficient level are identified: tool wear, temperature in the cutting zone, stresses in the tool material and tool material deformation.

scholarly journals Process Modeling and Simulation of Tableting—An Agent-Based Simulation Methodology for Direct Compression

Pharmaceutics ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 996
Author(s):  
Niels Lasse Martin ◽  
Ann Kathrin Schomberg ◽  
Jan Henrik Finke ◽  
Tim Gyung-min Abraham ◽  
Arno Kwade ◽  
...  
Keyword(s):  
Raw Materials ◽  
Pilot Scale ◽  
Physical Models ◽  
Agent Based Simulation ◽  
Validation Data ◽  
Agent Based ◽  
Industrial Processing ◽  
Digital Twins ◽  
Product And Process ◽  
The Impact

In pharmaceutical manufacturing, the utmost aim is reliably producing high quality products. Simulation approaches allow virtual experiments of processes in the planning phase and the implementation of digital twins in operation. The industrial processing of active pharmaceutical ingredients (APIs) into tablets requires the combination of discrete and continuous sub-processes with complex interdependencies regarding the material structures and characteristics. The API and excipients are mixed, granulated if required, and subsequently tableted. Thereby, the structure as well as the properties of the intermediate and final product are influenced by the raw materials, the parametrized processes and environmental conditions, which are subject to certain fluctuations. In this study, for the first time, an agent-based simulation model is presented, which enables the prediction, tracking, and tracing of resulting structures and properties of the intermediates of an industrial tableting process. Therefore, the methodology for the identification and development of product and process agents in an agent-based simulation is shown. Implemented physical models describe the impact of process parameters on material structures. The tablet production with a pilot scale rotary press is experimentally characterized to provide calibration and validation data. Finally, the simulation results, predicting the final structures, are compared to the experimental data.

scholarly journals Successive Harvests Modulate the Productive and Physiological Behavior of Three Genovese Pesto Basil Cultivars

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 560
Author(s):  
Luigi Formisano ◽  
Michele Ciriello ◽  
Christophe El-Nakhel ◽  
Marios C. Kyriacou ◽  
Youssef Rouphael
Keyword(s):  
Dry Matter ◽  
Co2 Assimilation ◽  
Stomatal Resistance ◽  
Matter Content ◽  
Dry Matter Content ◽  
Technological Parameters ◽  
Net Co2 Assimilation ◽  
Dry Biomass ◽  
Crop Cycle ◽  
The Impact

In the Italian culinary tradition, young and tender leaves of Genovese basil (Ocimum basilicum L.) are used to prepare pesto sauce, a tasty condiment that attracts the interest of the food processing industry. Like other leafy or aromatic vegetables, basil is harvested more than once during the crop cycle to maximize yield. However, the mechanical stress induced by successive cuts can affect crucial parameters associated with pesto processing (leaf/stem ratio, stem diameter, and dry matter). Our research accordingly aimed to evaluate the impact of successive harvests on three field-grown Genovese basil cultivars (“Aroma 2”, “Eleonora” and “Italiano Classico”) in terms of production, physiological behavior, and technological parameters. Between the first and second harvest, marketable fresh yield and shoot dry biomass increased by 148.4% and 172.9%, respectively; by contrast, the leaf-to-stem ratio decreased by 22.5%, while the dry matter content was unchanged. The increased fresh yield and shoot dry biomass at the second harvest derived from improved photosynthetic efficiency, which enabled higher net CO2 assimilation, Fv/Fm and transpiration as well as reduced stomatal resistance. Our findings suggest that, under the Mediterranean environment, “Italiano Classico” carries superior productive performance and optimal technological characteristics in line with industrial requirements. These promising results warrant further investigation of the impact successive harvests may have on the qualitative components of high-yielding basil genotypes with respect to consumer expectations of the final product.

scholarly journals Analysis of the Impact on the Mechanical Properties of Modification of Oligohydroxyethers in Organic Solvent Solution with Rubbers

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 519
Author(s):  
Vitalii Bezgin ◽  
Agata Dudek ◽  
Adam Gnatowski
Keyword(s):  
Mechanical Properties ◽  
Scientific Paper ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Molecular Weights ◽  
Wide Range ◽  
Strength Tests ◽  
Materials Used ◽  
Styrene Butadiene ◽  
The Impact

This paper proposes and presents the chemical modification of linear hydroxyethers (LHE) with different molecular weights (380, 640, and 1830 g/mol) with the addition of three types of rubbers (polysulfide rubber (PSR), polychloroprene rubber (PCR), and styrene-butadiene rubber (SBR)). The main purpose of choosing this type of modification and the materials used was the possibility to use it in industrial settings. The modification process was conducted for a very wide range of modifier additions (rubber) per 100 g LHE. The materials obtained in the study were subjected to strength tests in order to determine the effect of the modification on functional properties. Mechanical properties of the modified materials were improved after the application of the modifier (rubber) to polyhydroxyether (up to certain modifier content). The most favorable changes in the tested materials were registered in the modification of LHE-1830 with PSR. In the case of LHE-380 and LHE-640 modified in cyclohexanol (CH) and chloroform (CF) solutions, an increase in the values of the tested properties was also obtained, but to a lesser extent than for LHE-1830. The largest changes were registered for LHE-1830 with PSR in CH solution: from 12.1 to 15.3 MPa for compressive strength tests, from 0.8 to 1.5 MPa for tensile testing, from 0.8 to 14.7 MPa for shear strength, and from 1% to 6.5% for the maximum elongation. The analysis of the available literature showed that the modification proposed by the authors has not yet been presented in any previous scientific paper.

scholarly journals Are Biogenic and Pyrogenic Mesoporous SiO2 Nanoparticles Safe for Normal Cells?

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1427
Author(s):  
Katarzyna Solarska-Ściuk ◽  
Kinga Adach ◽  
Sylwia Cyboran-Mikołajczyk ◽  
Dorota Bonarska-Kujawa ◽  
Agnieszka Rusak ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Biological Effects ◽  
Mesoporous Silica Nanoparticles ◽  
Volume Ratio ◽  
Sio2 Nanoparticles ◽  
Amorphous Structure ◽  
Intracellular Ros ◽  
Materials Used ◽  
The Impact

Silicon dioxide, in the form of nanoparticles, possesses unique physicochemical properties (size, shape, and a large surface to volume ratio). Therefore, it is one of the most promising materials used in biomedicine. In this paper, we compare the biological effects of both mesoporous silica nanoparticles extracted from Urtica dioica L. and pyrogenic material. Both SEM and TEM investigations confirmed the size range of tested nanoparticles was between 6 and 20 nanometers and their amorphous structure. The cytotoxic activity of the compounds and intracellular ROS were determined in relation to cells HMEC-1 and erythrocytes. The cytotoxic effects of SiO2 NPs were determined after exposure to different concentrations and three periods of incubation. The same effects for endothelial cells were tested under the same range of concentrations but after 2 and 24 h of exposure to erythrocytes. The cell viability was measured using spectrophotometric and fluorimetric assays, and the impact of the nanoparticles on the level of intracellular ROS. The obtained results indicated that bioSiO2 NPs, present higher toxicity than pyrogenic NPs and have a higher influence on ROS production. Mesoporous silica nanoparticles show good hemocompatibility but after a 24 h incubation of erythrocytes with silica, the increase in hemolysis process, the decrease in osmotic resistance of red blood cells, and shape of erythrocytes changed were observed.

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