scholarly journals DESIGN AND MANUFACTURING OF AN OPTIMIZED MOULD INSERT BY DMLS TECHNOLOGY

2021 ◽  
Vol 2021 (6) ◽  
pp. 5492-5496
Author(s):  
TOMAS CORANIC ◽  
Keyword(s):  
Service Life ◽  
Mould Insert ◽  
Geometrical Complexity ◽  
Design And Manufacturing ◽  
Low Volume ◽  
Conventional Methods ◽  
Shaping Part ◽  
Manufacturing Time

Utilization of the DMLS technology in manufacturing of tools and moulds designed for injection and casting ranks among significant possibilities of use. The main advantage in case of DMLS in comparison to conventional methods rests in the fact that manufacturing time does not depend on geometrical complexity of shaping part of the mould. In case of low volume or prototype moulds it is advantageous to use a concept of combination of shaping intermediate pieces inserted in universal frames and as material the DM 20 alloy on bronze basis the service life of which in case of such application is several thousand pieces.

Innovative approaches to designing and manufacturing a prosthetic thumb

2020 ◽  
pp. 030936462094971 ◽  
Author(s):  
Branko Štefanovič ◽  
Monika Michalíková ◽  
Lucia Bednarčíková ◽  
Marianna Trebuňová ◽  
Jozef Živčák
Keyword(s):  
Additive Manufacturing ◽  
3D Scanning ◽  
Metacarpal Bone ◽  
Point Of View ◽  
Dominant Hand ◽  
Fused Filament Fabrication ◽  
Conventional Methods ◽  
Manufacturing Technologies ◽  
The Right ◽  
Manufacturing Time

Case description: Conventional methods for producing custom prosthetic fingers are time-consuming, can be uncomfortable for the patient, and require a skilled prosthetist. The subject was a 40-year-old male with congenital absence of the thumb and related metacarpal bone on the right non-dominant hand, anomaly of the lengths of individual upper limb segments, and contracture of the elbow joint. This hand presentation made it impossible for him to perform thumb opposition, which is a very important function for common daily activities. Objective: The goal was to design an individual passive thumb prosthesis using free open-source software, 3D scanning technology, and additive manufacturing methods (i.e., fused filament fabrication). Study design: Case report. Treatment: Artificial thumb prostheses with two types of bases and fastening interfaces were designed and manufactured. One combination was chosen as the best alternative. Outcomes: The shape, positioning, firmness, and fastening of the prosthesis were compliant enough for the patient to be able to hold objects with his healthy fingers and artificial thumb. This innovative approach to fabrication of a custom thumb prosthesis provided considerable advantages in terms of custom sizing, manufacturing time, rapid production, iteration, comfort, and costs when compared to conventional methods of manufacturing a hand prosthesis. Conclusion: The methodology of designing and manufacturing a prosthetic thumb using 3D scanning and additive manufacturing technologies have been demonstrated to be adequate from a practical point of view. These technologies show potential for use in the practice of prosthetics.

scholarly journals Design to Degrade

2021 ◽  
Author(s):  
◽  
Zara Fong
Keyword(s):  
Additive Manufacturing ◽  
Mass Production ◽  
Environmental Issues ◽  
Parametric Modelling ◽  
Design And Manufacturing ◽  
Current Design ◽  
Low Volume ◽  
Two Stages ◽  
Digital Processes ◽  
Key Innovations

<p>Birth, growth, death and decay constitute an inherent cycle in nature that maintains balance and enables ecosystems to adapt to external changes. Although death and decay are essential for birth and growth of the following generations, these disappearing stages are often ignored and unappreciated in manmade cultures and practices. Especially in design, in the era of mass production, the pursuit of quantity and uniformity inevitably link to many environmental issues. As a desperate response, bio-based materials have recently gained attention as alternatives to fossil-derived materials or new resources for industry, and rapid advancement of additive manufacturing (AM) has revolutionised conventional methods of manufacturing, enabling low volume, quality-focused production. This research discusses the pioneering incorporation of the stages of death and decay into design practices, exploiting a novel opportunity provided by the two key innovations, AM technologies and bio-based materials. A series of digital plants which employ and undergo the two degenerative stages are designed and produced using digital and scientific processes, and their transformative degradation induced by environmental stimuli, including humidity and UV, is demonstrated. The programmed visual and physical deformations suggest that a purposeful and systematic introduction of the two stages to the current design and manufacturing practices could offer a more sustainable and responsible approach to creation and production. They also exhibit new possibilities for digital processes, including parametric modelling and 3D-printing, through an integrative combination with bio-based materials.</p>

scholarly journals Comprehensive View on Racing Car Upright Design and Manufacturing

Symmetry ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1020 ◽  
Author(s):  
Marek Hunar ◽  
Lukas Jancar ◽  
David Krzikalla ◽  
David Kaprinay ◽  
David Srnicek
Keyword(s):  
Finite Element ◽  
Topological Optimization ◽  
Initial Model ◽  
Element Analysis ◽  
Final Model ◽  
The Finite Element Analysis ◽  
Design And Manufacturing ◽  
Multiple Material ◽  
Conventional Methods ◽  
Functional Prototype

This paper deals with the design of an upright using a topological optimization. This type of optimization is a relatively young and rapidly evolving area of computational mechanics that seeks to make multiple material savings that cannot be achieved by conventional methods. The optimized upright was utilized in a fully functional prototype of the student formula within the Formula Student competition. The main objective of the optimization was to meet the requirements of the physical properties, weight, stiffness, and strength of the upright. The initial model of the upright was iteratively optimized using topological optimization and a finite element static analysis to obtain the final model. Using the finite element analysis, its behavior in operation within individual load cases was predicted. Symmetry was used to mirror the finished model to obtain the opposite upright of the other side of the car. Finally, the topologically optimized upright was compared with an upright made by conventional methods.

Analytic, Numerical, and Stochastic Comparison of Forming Force Modeling at Deep Drawing and Backward Extrusion on the Same Al 99.5 F7 Parts

2007 ◽  
Vol 344 ◽  
pp. 419-426 ◽  
Author(s):  
Branimir Barisic ◽  
Miljenko Dino Math ◽  
Branko Grizelj
Keyword(s):  
Deep Drawing ◽  
Cost Reduction ◽  
Direct Application ◽  
Stochastic Comparison ◽  
Forming Force ◽  
Modeling And Analysis ◽  
Backward Extrusion ◽  
Force Modeling ◽  
Design And Manufacturing ◽  
Manufacturing Time

In order to determine the forming force in deep drawing and backward extrusion processes (on Al 99.5F7 specimens) the analytical, numerical and stochastic modeling and analysis of forming force on the basis of the Box-Wilson’s multi factorial experimental designs by use of rotatable experimental design were carried out. The goal of the paper is to predict the force in these different forming processes giving identical parts by means of different modeling approaches. This study will seek to compare the results of these modeling solutions with experimental results serving to check the correction and the verification of analytic, stochastic and numerically obtained results. Also, the scope of the present paper is to evaluate different parameters affecting these processes and to examine some experimental procedures in laboratory scale for the listed material in order to give more useful information in numerical and stochastic computations and also, to define the correlation among the parameters of these processes in order to improve the existing one and to raise it to a higher techno economic level. The increasing tendency for industrial parts cost reduction, quality improvement, materials savings, and the shortening of design and manufacturing time is more focused on this way of analysis of processes. These investigations are a basis for general conclusions about the forming force and they have a direct application in the projecting of these processes, tools and forming systems.

Grinding Affect the Service Life of Mould Research

2013 ◽  
Vol 850-851 ◽  
pp. 225-228
Author(s):  
Fang He
Keyword(s):  
Residual Stress ◽  
Service Life ◽  
Cavity Surface ◽  
Grinding Process ◽  
Processing Quality ◽  
Micro Cracks ◽  
Close Relationship ◽  
Mould Cavity ◽  
Manufacturing Time

In the process of modern mould manufacturing, grinding work still account for 25% ~ 45% of the total manufacturing time mould. Mould manufacturing quality of the finished product is closely related to the precision of mould manufacturing, particularly with the mould cavity surface accuracy and surface roughness has a close relationship. In the manufacturing of mould to make grinding micro cracks and residual stress is reduced to a minimum, full attention, grinding process in order to improve the service life of mould. So research to improve grinding processing quality, improve the service life of the mold, to extend the time of service, has the positive significance

scholarly journals ANALYSIS OF WELL DESIGNS, THEIR SERVICE LIFE UNTIL FIRST REPAIRS FOR CASING STRINGS LEAK TIGHTNESS RESTORATION

2016 ◽  
pp. 56-59
Author(s):  
A. A. Zalyatdinov ◽  
L. B. Huzina
Keyword(s):  
Service Life ◽  
Quality Service ◽  
Leak Tightness ◽  
Conventional Methods ◽  
Shutoff Device

This paper describes the issues of well cementing quality, service life and types of repairs for restoration of failed leak tightness of casing strings and cementing. The analysis run for more than 100 wells in the Fedorovskaya area, the field Romashkinskoye, provided the data comparing the quality of casing strings cementing by conventional methods and cementing of wells where a profile shutoff device was used.

scholarly journals Design to Degrade

2021 ◽  
Author(s):  
◽  
Zara Fong
Keyword(s):  
Additive Manufacturing ◽  
Mass Production ◽  
Environmental Issues ◽  
Parametric Modelling ◽  
Design And Manufacturing ◽  
Current Design ◽  
Low Volume ◽  
Two Stages ◽  
Digital Processes ◽  
Key Innovations

<p>Birth, growth, death and decay constitute an inherent cycle in nature that maintains balance and enables ecosystems to adapt to external changes. Although death and decay are essential for birth and growth of the following generations, these disappearing stages are often ignored and unappreciated in manmade cultures and practices. Especially in design, in the era of mass production, the pursuit of quantity and uniformity inevitably link to many environmental issues. As a desperate response, bio-based materials have recently gained attention as alternatives to fossil-derived materials or new resources for industry, and rapid advancement of additive manufacturing (AM) has revolutionised conventional methods of manufacturing, enabling low volume, quality-focused production. This research discusses the pioneering incorporation of the stages of death and decay into design practices, exploiting a novel opportunity provided by the two key innovations, AM technologies and bio-based materials. A series of digital plants which employ and undergo the two degenerative stages are designed and produced using digital and scientific processes, and their transformative degradation induced by environmental stimuli, including humidity and UV, is demonstrated. The programmed visual and physical deformations suggest that a purposeful and systematic introduction of the two stages to the current design and manufacturing practices could offer a more sustainable and responsible approach to creation and production. They also exhibit new possibilities for digital processes, including parametric modelling and 3D-printing, through an integrative combination with bio-based materials.</p>

Proposal of technical specifications for the “arch-tied strengthening method” applied on medium span bridges

2021 ◽  
Author(s):  
Alvaro Rojas ◽  
Hernan Pinto
Keyword(s):  
Service Life ◽  
New Method ◽  
Innovative Solutions ◽  
Technical Details ◽  
Technical Specifications ◽  
Conventional Methods ◽  
Safety And Stability ◽  
Strengthening Method

<p>The service life of the bridges is affected by different factors that induce pathologies with possible consequences of collapse. Such factors influence the functionality, safety and stability. Therefore, engineering and research seek innovative solutions to address these problems in the long term.</p><p>One of the main problems presented by the bridges in Chile is that scour produced in the area of the piers. there are several conventional methods of strengthening with the aim of improving their performance against erosion and scour processes. During 2012 a new method of strengthening has been investigated: Tied-arch method, proposing the modification of the static schema through the construction of an network arch.</p><p>Based on this method, this paper provides the study and detailed proposal of constructive specifications of the main joints of its elements, including technical details (Drawing).</p>

scholarly journals Design and Manufacturing of a Turning Table for Polishing Tanks in Beer Industry

2020 ◽  
Vol 28 (46) ◽  
pp. 74-81
Author(s):  
Catalin Buciuman ◽  
Aurelian Adam ◽  
Laurentiu Galatan
Keyword(s):  
Surface Quality ◽  
Rotary Table ◽  
Polishing Process ◽  
Beer Industry ◽  
Manufactured Products ◽  
Design And Manufacturing ◽  
Design And Manufacture ◽  
Manufacturing Time ◽  
Made In

AbstractThe main objective of this paper was to design and manufacture a turning table for fixing conical and tori spherical heads used for tanks in beer industry, to polish the surfaces and to obtain better quality and roughness. The turning table is an indispensable fixture device in the polishing process for vessel heads, where the accuracy and the roughness of the surface is an important factor because it can influence the quality of the beer. If the surface is smooth, the microbes and bacteria cannot be deposited on the tanks’ surfaces and also a good quality of the tanks’ walls prevent contamination in the beer composition. The research were made in Inotec Company, Romania. The new proposed design for the turning table improved the actual technology and reduced the manufacturing time. The tests made on the obtained manufactured products using the rotary table showed that the surface quality was improved too.

scholarly journals AIDED DESIGN OF TRANSPORT CONTAINERS FOR AIRCRAFT UNITS AND PANELS

2021 ◽  
Vol 23 (1) ◽  
pp. 115-122
Author(s):  
D.V. Yastrebov ◽  
◽  
E.N. Zguralskaya ◽  
D.V. Egorychev ◽  
◽  
...  
Keyword(s):  
Production Costs ◽  
Design And Manufacturing ◽  
Design Documentation ◽  
The Cost ◽  
Aided Design ◽  
Manufacturing Time

The paper describes the automation of the process of developing design documentation for containers for non-standard large-sized aircraft units and panels. The software is described, the use of which can significantly reduce the design and manufacturing time, unify individual elements of the container, which together will lead to a significant reduction in the production costs of the enterprise, as well as to a decrease in the cost of the aircraft.

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