scholarly journals Optimizing Induction Heating of WNiCo Billets Processed via Intensive Plastic Deformation

2020 ◽  
Vol 10 (22) ◽  
pp. 8125
Author(s):  
Lenka Kunčická ◽  
Adéla Macháčková ◽  
Rudolf Petrmichl ◽  
Zuzana Klečková ◽  
Martin Marek
Keyword(s):  
Induction Heating ◽  
Deformation Temperature ◽  
Tungsten Heavy Alloy ◽  
Heating Regime ◽  
High Quality ◽  
Rotary Swaging ◽  
Electromagnetic Simulations ◽  
Software Packages ◽  
Sintered Powder ◽  
Heating Model

The aim of the work is to optimize the induction heating regime and propose a suitable deformation temperature for a pre-sintered powder-based tungsten heavy alloy workpiece subsequently processed via rotary swaging. The heating regime is designed with the help of numerical analyses and subsequent experiments. The first part of the study focuses on the theoretic background of the induction heating and comprises the development of a reliable induction heating model via performing electromagnetic simulations in two individual computational software packages (for verification). The second part of the study then involves the optimization of the heating regime using the designed numerical model. Last but not least, the predicted results are compared to the experimentally acquired results, and the optimized heating regime, applicable before experimental rotary swaging of the WNiCo workpiece, is proposed. The results of the microstructure analyses of the workpiece heated to the selected optimum deformation temperature of 900 °C showed that the designed induction heating procedure provided sufficient heating of the bulk of the workpiece (contrary to the lower swaging temperature), as the swaged microstructure featured well-deformed tungsten agglomerates. Furthermore, the analyses documented the high-quality oxidation-free surface of the particular workpiece (contrary to the higher swaging temperature).

scholarly journals Affecting Structure Characteristics of Rotary Swaged Tungsten Heavy Alloy Via Variable Deformation Temperature

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4200 ◽  
Author(s):  
Adéla Macháčková ◽  
Ludmila Krátká ◽  
Rudolf Petrmichl ◽  
Lenka Kunčická ◽  
Radim Kocich
Keyword(s):  
Mechanical Properties ◽  
Residual Stress ◽  
Deformation Behaviour ◽  
Heavy Alloy ◽  
Tungsten Heavy Alloy ◽  
Structural Development ◽  
Material Behaviour ◽  
Real Experiment ◽  
Structure Characteristics ◽  
Rotary Swaging

This study focuses on numerical prediction and experimental investigation of deformation behaviour of a tungsten heavy alloy prepared via powder metallurgy and subsequent cold (20 °C) and warm (900 °C) rotary swaging. Special emphasis was placed on the prediction of the effects of the applied induction heating. As shown by the results, the predicted material behaviour was in good correlation with the real experiment. The differences in the plastic flow during cold and warm swaging imparted differences in structural development and the occurrence of residual stress. Both the swaged pieces exhibited the presence of residual stress in the peripheries of W agglomerates. However, the NiCO matrix of the warm-swaged piece also exhibited the presence of residual stress, and it also featured regions with increased W content. Testing of mechanical properties revealed the ultimate tensile strength of the swaged pieces to be approximately twice as high as of the sintered piece (860 MPa compared to 1650 MPa and 1828 MPa after warm and cold swaging, respectively).

scholarly journals Topology optimization of induction heating model using sequential linear programming based on move limit with adaptive relaxation

Open Physics ◽  
2017 ◽  
Vol 15 (1) ◽  
pp. 845-850 ◽  
Author(s):  
Hiroshi Masuda ◽  
Yutaro Kanda ◽  
Yoshifumi Okamoto ◽  
Kazuki Hirono ◽  
Reona Hoshino ◽  
...  
Keyword(s):  
Linear Programming ◽  
Topology Optimization ◽  
Induction Heating ◽  
High Efficiency ◽  
Magnetic Energy ◽  
Design Method ◽  
Point Of View ◽  
Sequential Linear Programming ◽  
Electrical Machinery ◽  
Heating Model

AbstractIt is very important to design electrical machineries with high efficiency from the point of view of saving energy. Therefore, topology optimization (TO) is occasionally used as a design method for improving the performance of electrical machinery under the reasonable constraints. Because TO can achieve a design with much higher degree of freedom in terms of structure, there is a possibility for deriving the novel structure which would be quite different from the conventional structure. In this paper, topology optimization using sequential linear programming using move limit based on adaptive relaxation is applied to two models. The magnetic shielding, in which there are many local minima, is firstly employed as firstly benchmarking for the performance evaluation among several mathematical programming methods. Secondly, induction heating model is defined in 2-D axisymmetric field. In this model, the magnetic energy stored in the magnetic body is maximized under the constraint on the volume of magnetic body. Furthermore, the influence of the location of the design domain on the solutions is investigated.

scholarly journals Development of heat treated high quality UOE pipe by induction heating process.

1985 ◽  
Vol 24 (5) ◽  
pp. 418-420
Author(s):  
T. Taira ◽  
K. Ume ◽  
T. Ishihara ◽  
Y. Nishino ◽  
K. Uma
Keyword(s):  
Induction Heating ◽  
Heating Process ◽  
High Quality ◽  
Heat Treated

Effect of thermomechanical processing via rotary swaging on properties and residual stress within tungsten heavy alloy

2020 ◽  
Vol 87 ◽  
pp. 105120 ◽  
Author(s):  
Lenka Kunčická ◽  
Adéla Macháčková ◽  
Nicholas P. Lavery ◽  
Radim Kocich ◽  
Jonathan C.T. Cullen ◽  
...  
Keyword(s):  
Residual Stress ◽  
Thermomechanical Processing ◽  
Heavy Alloy ◽  
Tungsten Heavy Alloy ◽  
Rotary Swaging

Increasing Productivity Using Parametric Data and Macros

1991 ◽  
Author(s):  
Robert W. Gorman
Keyword(s):  
Automatic Design ◽  
High Quality ◽  
Software Packages ◽  
Parametric Data ◽  
Development Cycle ◽  
Modeling Techniques ◽  
Increase Productivity ◽  
Product Development Cycle ◽  
Model Components

Abstract Computer-aided Engineering (CAE) has successfully helped engineers in the 1980’s to decrease the product development cycle. This has allowed companies to define high-quality, competitively priced products. In the 1990’s, companies must expand the role of CAE to help decrease the development cycle even more (i.e., increase the productivity of CAE). This paper will discuss two modeling techniques that can help designers/analysts initially define a computer model and automatically update this model when a component is altered. These techniques are the ability to define the model in terms of parametric data and to customize software packages to fit a company’s particular needs, by using macros. Designers who produce variations of a basic design or who model components geometrically based on other components will be able to increase their productivity using these techniques. Several examples will be used to illustrate how these techniques will increase productivity and how automatic design optimization may be used.

Replacing Proprietary Software with Open Source Software

2014 ◽  
pp. 46-58
Author(s):  
Albert Akyeampong
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
High Quality ◽  
Industrial Environment ◽  
Proprietary Software ◽  
Software Packages ◽  
Share Information

Most companies face high expenditures and numerous challenges in today’s competitive industrial environment where cost of technology can be an extra burden. To address these challenges, businesses can use Open Source Software (OSS). Even though OSS provides many benefits, including high-quality software and substantial profit (Sohn & Mok, 2008), OSS also has a number of disadvantages. In several countries, governments have begun to recognize the importance of OSS and have started to adopt explicit policies on OSS (Cook & Horobin, 2006). Open Source Software holds several compelling benefits for businesses. Information on wide-ranging use and examples of OSS in organizations are scattered and sometimes skewed to a few OSS. The chapter identifies different OSS that are currently used or have the potential to substitute other proprietary software packages in business; how organizations share information and how OSS is used globally by organizations and governments and their implications thereof is reviewed.

A novel type of precision cropping machinery using rotary striking action

2009 ◽  
Vol 223 (8) ◽  
pp. 1965-1967 ◽  
Author(s):  
Y Tang ◽  
S D Zhao ◽  
Z W Wang
Keyword(s):  
Cross Section ◽  
Radial Displacement ◽  
Cold Forging ◽  
Cold Extrusion ◽  
High Quality ◽  
Rotary Swaging

In this article, novel precision bar cropping machinery, with a modified rotary swaging machine, which has been extended by the addition of a stroke adjuster, was designed and built. By adjusting the strike frequency and the radial displacement, a crack can be made to propagate quickly and regularly, leading to a final regular separation of the bar. Precision cropping experiments on several metal bars were conducted, which can be directly used in the subsequent process, such as cold-extrusion and cold-forging and so on because of the high-quality cross-section, high geometric and weight precision using this cropping device.

Cold rotary swaging of a tungsten heavy alloy: Numerical and experimental investigations

2016 ◽  
Vol 61 ◽  
pp. 264-272 ◽  
Author(s):  
Radim Kocich ◽  
Lenka Kunčická ◽  
Daniel Dohnalík ◽  
Adéla Macháčková ◽  
Michal Šofer
Keyword(s):  
Heavy Alloy ◽  
Experimental Investigations ◽  
Tungsten Heavy Alloy ◽  
Rotary Swaging
Sign in / Sign up

Export Citation Format

Share Document