- TITLE:
PERSPECTIVES AND DEVELOPMENT TRENDS FOR APPLICATION OF ADDITIVE TECHNOLOGIES IN MODERN DENTISTRY IN THE LIGHT OF INDUSTRY 4.0
- AUTHOR(S):
Tsanka Dikova
- ABSTRACT:
Additive manufacturing technologies (AMTs) offer a new approach for cost-effective production of goods and services and are therefore quite rightly included as part of the Fourth Industrial Revolution, Industry 4.0. Last years great attention is paid to the AMTs as technologies of the future development in many countries all over the world including the European Union. Depending on the availability of a good base of installed 3D printers and intellectual potential, the countries are divided into two groups: 1) leaders in the field of 3D printing technology and 2) countries with large bases of equipment, but lack of trained and qualified labor force. The aim of the present paper is to analyze the perspectives and development trends for application of additive technologies in modern dental medicine in the light of Industry 4.0. The constant development of AMTs will accelerate their implementation in various fields and in particular in medicine/dentistry. The 3D printing technologies are first applied in dentistry, due to the possibility for fabrication of individual dental constructions. Currently, almost all worldrenowned companies for production of dental materials and machines develop additive technologies and manufacture the corresponding equipment. According to the forecasts, the 3D printing is expected to be widely used in dental clinics and laboratories in the next 5-10 years. The additive technologies most often applied in dentistry include stereolithography, fused deposition modeling, selective electron beam melting, selective laser melting/sintering and ink-jet printing. The great variety of materials used in these processes allow constructions with different purposes to be made for all areas of dental medicine - surgery, oral implantology, conservative dentistry, orthodontics and prosthetic dentistry.
- DOI:
https://doi.org/10.62853/ELSJ6320
- PAGES:
1-11
- DOWNLOAD:
PERSPECTIVES AND DEVELOPMENT TRENDS FOR APPLICATION OF ADDITIVE TECHNOLOGIES IN MODERN DENTISTRY IN THE LIGHT OF INDUSTRY 4.0
- HOW TO CITE THIS ARTICLE:
Dikova T. Perspectivies and development trends for application of additive technologies in modern dentistry in the light of industry 4.0. Journal of the Technical University of Gabrovo. 68 (2024) 1-11.
- TITLE:
FOUR KORDINATNYY FLOORING LAYOUT OF PORTAL COMPOSITION
- AUTHOR(S):
Y. Kuznetsov, I.R. Kobets
- ABSTRACT:
The article highlights the relevance and formulates the problem of creating small-sized workbenches with computer hardware, inspecting the data generators and the design of such workbenches, and proposing options for a table-top workbench with a portal layout. The example of the preparation of a folding part shows the procedure for breaking up the ceramic program.
- DOI:
https://doi.org/10.62853/OXBF6930
- PAGES:
6-10
- DOWNLOAD:
FOUR KORDINATNYY FLOORING LAYOUT OF PORTAL COMPOSITION
- HOW TO CITE THIS ARTICLE:
Kuznetsov Y., I.R. Kobets. FOUR KORDINATNYY FLOORING LAYOUT OF PORTAL COMPOSITION. Journal of Technical University Gabrovo. 69 (2024)
- TITLE:
SURFACE MODIFICATION OF TITANIUM ALLOYS Ti-6Al-4V AND Ti-6Al-7Nb: METHODS FOR ENHANCING WEAR RESISTANCE AND BIOCOMPATIBILITY. A BRIEF REVIEW
- AUTHOR(S):
V. Koeva, D. Veselinov, R. Yankova, H. Skulev, I. Rusev
- ABSTRACT:
Titanium and its alloys, primarily Ti-6Al-4V and Ti-6Al-7Nb, are widely used in various high-tech sectors due to their excellent mechanical properties, high corrosion resistance, and low density. However, these materials exhibit low wear resistance and a tendency to gall during friction, limiting their applicability in aggressive environments or under heavy loads. This review discusses the main challenges associated with the tribological properties of titanium alloys and various modern surface modification techniques, including chemical and electrochemical methods, laser coatings, ion implantation, and nanocoatings. The advantages of these techniques in improving wear resistance are analyzed, with a focus on applications in aerospace and medicine. Special attention is given to the impact of friction in different environments and the anti-friction properties of titanium alloys. The review highlights the need for further development of surface modification technologies to enable broader use of titanium and its alloys in extreme conditions and to extend their service life.
- DOI:
https://doi.org/10.62853/UZCI2687
- PAGES:
52-55
- DOWNLOAD:
SURFACE MODIFICATION OF TITANIUM ALLOYS Ti-6Al-4V AND Ti-6Al-7Nb: METHODS FOR ENHANCING WEAR RESISTANCE AND BIOCOMPATIBILITY. A BRIEF REVIEW
- HOW TO CITE THIS ARTICLE:
Koeva V. , D. Veselinov, R. Yankova, H. Skulev, I. Rusev. Surface modification of titanium alloys Ti-6Al-4V and Ti-6Al-7Nb: Methods for enhansing wear resistance and biocompatibility. A brief review. JTUG. 69 (2024) 52-55.
- TITLE:
OPTIMIZATION OF DEFECT PREVENTION IN HOT FORGING OF CuZn40Pb2 BRASS ALLOY WATER VALVE COVERS: A FINITE ELEMENT AND EXPERIMENTAL APPROACH
- AUTHOR(S):
I. Cetintav, F. Karacam
- ABSTRACT:
This study explores the hot forging process of CuZn40Pb2 brass alloy water valve covers through a combination of finite element modeling and experimental trials. Key factors influencing defect formation, such as the cylindrical workpiece geometry and die temperature, are examined in detail. Simulations using Deform 3D software focused on the impact of temperature on material flow behavior, incorporating inputs such as geometry, filling sequence, and applied force. Experimental findings underscored the crucial role of the friction coefficient, which diminishes with the use of lubricants, in controlling material flow. The reduction in friction, caused by heat generated from die friction during forging, was found to elevate the risk of defects. Stress and strain analysis from the simulations revealed a complex interaction between temperature and friction, significantly affecting defect formation. The strong correlation between simulation and experimental results confirmed the value of computational modeling in predicting and preventing defects. This research provides valuable insights into optimizing hot forging parameters for CuZn40Pb2 brass alloy components, enabling improvements in product quality and process efficiency.
- DOI:
https://doi.org/10.62853/MMQR6587
- PAGES:
48-51
- DOWNLOAD:
OPTIMIZATION OF DEFECT PREVENTION IN HOT FORGING OF CuZn40Pb2 BRASS ALLOY WATER VALVE COVERS: A FINITE ELEMENT AND EXPERIMENTAL APPROACH
- HOW TO CITE THIS ARTICLE:
Cetintav I., F. Karacam. optimization of defest prevention in hot forging of CuZn40Pb2 brass alloy water valve covers: a finite element and experimental approach. JTUG 69 (2024) 48-51
- TITLE:
EFFECTS OF HOMOGENIZATION PROCESS OF BILLET CASTING ON MECHANICAL PROPERTIES OF EXTRUSION PRODUCT
- AUTHOR(S):
Ö. Ayer, O. Kapsiz
- ABSTRACT:
Aluminum extrusion industry has a large processing volume today due to the widespread use of aluminum, the development of processing methods with the developing technology and the ability to make the raw aluminum with the desired properties by alloying method. The homogenization process is a heat treatment method that enhances the extrusion industry, improves the extrudability of raw materials, and helps address issues related to dendritic structures and grain boundaries in the final products. Applying this method to the raw material increases both the profitability and ease of the process. The fundamental properties of aluminum alloys, the methods and parameters used in the extrusion process, and the preheating treatments applied during the process were utilized in the production of billets and the homogenization process. Tensile and hardness test results were analyzed for samples obtained through the extrusion method from both homogenized and non-homogenized raw materials.
- DOI:
https://doi.org/10.62853/XWEK8844
- PAGES:
45-47
- DOWNLOAD:
EFFECTS OF HOMOGENIZATION PROCESS OF BILLET CASTING ON MECHANICAL PROPERTIES OF EXTRUSION PRODUCT
- HOW TO CITE THIS ARTICLE:
Ayer Ö., O. Kapsiz. Effects of Homogenization process of billet casting on mechanical properties of extrusion product. JTUG. 69 (2024) 45-47.
