Analysis of Ti-6Al-4V samples produced by an industrial partner using Wire Arc Additive Manufacturi

2020 ◽  
Author(s):  
◽  
Namit Jain
Keyword(s):  
Industrial Partner

URANS Simulations and Experimental Investigations on Unsteady Aerodynamic Effects in the Blade Tip Region of a Shrouded Fan Configuration

2017 ◽  
Author(s):  
Gi-Don Na ◽  
Frank Kameier ◽  
Nils Springer ◽  
Michael Mauß ◽  
C. O. Paschereit
Keyword(s):  
Applied Sciences ◽  
Numerical Simulations ◽  
Aerodynamic Performance ◽  
Design Parameters ◽  
Experimental Investigations ◽  
Acoustic Measurements ◽  
Noise Emission ◽  
Industrial Partner ◽  
University Of Applied Sciences ◽  
Blade Tip

The acoustical characteristics of cooling fans are an essential criterion of product quality in the automotive industry. Fan modules have to suffice growing customer expectations which are reflected in the comfort requirements set by car manufacturers around the world. In order to locate dominant acoustic sources and to reduce the noise emission generated by a shrouded fan configuration, numerical simulations and experimental investigations are performed. The working approach considers variously modified fan geometries and their evaluation regarding arising vortex flow phenomena and their effect on a decreased sound pressure level (SPL) in consideration of an improvement or the constancy of aerodynamic fan performance. Particular emphasis lies on the analysis of secondary flows in the blade tip region by post-processing CFD-results. Due to the large number of geometrical modifications investigated and the importance of highly resolved eddy structures, a hybrid approach is chosen by applying the SAS-SST turbulence model in URANS simulations. The SAS (Scale Adaptive Simulation) delivers LES (Large Eddy Simulation) content in unsteady regions of a RANS-simulation and exhibits not nearly the high computational effort needed to perform a full scale LES. An assessment of the actual propagation of noise emission into the far-field is made by performing experimental investigations on the most promising modifications. The acoustic measurements are carried out in a fan test stand in the anechoic chamber of Duesseldorf University of Applied Sciences. The aerodynamic performance is measured in a fan test rig with an inlet chamber setup in accordance to ISO 5801. The measured acoustical and aerodynamic performances are validated by the industrial partner. The results of the acoustic measurements are in turn utilized to determine indicators of noise radiation in the numerical simulation. Within this work an innovative geometry modification is presented which can be implemented into shrouded fan configurations with backward-skewed blades. The new design exhibits a reduced SPL (A-weighted) of approx. 4 dB over the entire operating range while showing no significant deterioration on the aerodynamic performance. While the design was registered for patent approval cooperatively by the industrial partner and Duesseldorf University of Applied Sciences, further investigations regarding variations of design parameters are performed and presented in this paper. All numerical simulations are performed with ANSYS CFX, a commercial solver widely spread in the industry. Methods similar to those shown in this work can be implemented in the design phase of axial fans in order to develop acoustically optimized fan geometries.

Effectiveness of the Cryogenic Treatment of Tungsten Carbide Inserts on Tool Wear When in Full Production Operations

2004 ◽  
Author(s):  
Kenneth A. Arner ◽  
Christopher D. Agosti ◽  
John T. Roth
Keyword(s):  
Tool Life ◽  
Cutting Tool ◽  
Cryogenic Treatment ◽  
Cutting Tools ◽  
Process Variable ◽  
Production Lines ◽  
Industrial Partner ◽  
Full Production ◽  
Carbide Inserts

As a cutting tool wears, the quality of the parts being produced by the tool are reduced. Therefore, it is important to change cutting tools whenever the wear on the tool begins to cause unacceptable or out-of-specification parts. However, frequent replacement of tooling is not only expensive, it also results in a loss of production throughput. Therefore, in order to lower tooling costs and increase production rates, it is vital to extend cutting tool life. Thus, this research focuses on establishing the effect that cryogenically treating carbide inserts has on the overall tool life when the tools are operating in production. To validate the effectiveness, multiple treated and untreated cutting tools for five styles of inserts are examined. The cutters are tested in production lines that are fabricating parts for an industrial partner where the only process variable that is changed is the cryogenic treatment of the tooling. For the five insert styles tested, each style provided very consistent changes in overall tool life. However, the amount of improvement was dependent on the tool style. One style was found to have its life doubled, whereas, another style had its life decreased. Possible causes for this difference in effectiveness of the treatment are presented, along with a discussion concerning the actual costs savings that the treatment represents for the industrial partner.

scholarly journals Using Internships to Enhance Engineering Programs – the Case Study of an Industrial Partner

2018 ◽  
Author(s):  
Antoine Côté
Keyword(s):  
Design Process ◽  
Major Part ◽  
High Importance ◽  
Engineering Programs ◽  
Industrial Partner ◽  
The University

Many institutions recognise the importance of internships.As part of the training of future engineers, theseopportunities confront students to the realities of jobmarket. The University studied in this case is one of thoseinstitutions. It has developed its way of integratinginternships with the engineering bachelors degree.The University in question gives high importance topractical knowledge. As third and fourth year studentscomplete their studies, they are asked to manage full-scaleprojects – from Design Brief to assembly, along withPlans and Specifications. These courses are bound to theUniversity's engineering Chair, who accompaniesstudents in their design process. All subjects come fromreal customers who either have heard of the Chair, ordiscovered it via internships. In fact, a major part of theChair's clients comes from partnerships developed insummer time, outside of the walls of the University: theconfidence and trust built in internships propel theprogram. Recently, this symbiosis was brought up to anew level

Smart Melting: Increasing Efficiency in Non-Ferrous Melting and Die-Casting Plants through Incident Management

2018 ◽  
Vol 882 ◽  
pp. 174-181 ◽  
Author(s):  
Stefan Müller ◽  
Wolfgang Schlüter ◽  
Jakob Krieg
Keyword(s):  
Probability Distributions ◽  
Die Casting ◽  
Software Tool ◽  
Incident Management ◽  
Time To Failure ◽  
Statistical Probability ◽  
Industrial Partner ◽  
Current State ◽  
Project Smart ◽  
Casting Industry

This study is part of the project Smart Melting in the research cooperation Green Factory Bavaria (GFB). The main targets of the project are the improvement of the key figure OEE (Overall Equipment Effectiveness) and the reduction of the energy consumption in the non-ferrous die-casting industry. By implementing a software tool in the factory of an industrial partner, which collects the essential data to improve maintenance, a necessary requirement for an incident management is created. This article focuses on the current state of data acquisition in the plant of the industrial partner and the estimated potential of process improvement by an incident management system. The collected incident data of the producing die-casting machines are processed and analyzed. In the data analysis the incidents are classified according to their cause and assigned to the respective machine. The time to repair (TTR) and the time to failure (TTF) are investigated in order to obtain statistical probability distributions. The TTR is an exponentially distributed value and the TTF can be depicted using the Weibull distribution [1]. A simulation model based on statistically concentrated data is used to determine the effects of a better incident management on the key figure OEE. An improved maintenance reduces the number of incidents and increases the TTF. An improved incident management which shortens the downtime reduces the TTR. As a result of the improvements the availability factor of the OEE increases remarkably. Furthermore an increase of the quality factor (proportion of good parts) of the OEE can be expected.

Use of Cad Systems in Testing the Collision of Underground Transportation Means / Zastosowanie systemów Cad w badaniach kolizyjności środków transportu podziemnego

2013 ◽  
Vol 58 (2) ◽  
pp. 411-432 ◽  
Author(s):  
Marek Dudek
Keyword(s):  
Coal Mines ◽  
Transportation Safety ◽  
Cad Systems ◽  
Industrial Partner ◽  
Transportation Process ◽  
Training Activities ◽  
Underground Transportation ◽  
Didactic Material ◽  
And Training ◽  
Roof Support

A concept of use of CAD systems in testing collision of underground transportation means is presented. Reasons for undertaking this problem are given with end users identified. The concept of the system for collision analyses of transported loads is described. Examples of collision analysis during transportation of powered roof support are given. Presented system is designed to aid planning, organizational and training activities undertaken in management of transportation safety in mines. It will be also possible to use software resources, developed within the system as the didactic material as regards safe transportation process, which include hazards to the employees working in the area of transportation operations. Developed prototype of a system for testing the collision of underground transportation means was positively assessed by employees of the Coal Company, JSC - industrial partner of KOMAG. This prototype is continuously improved and adapted for commercial implementation in the selected coal mines.

Academic—Industrial Collaboration

1993 ◽  
Vol 7 (4) ◽  
pp. 202-204 ◽  
Author(s):  
Thomas Gering
Keyword(s):  
Special Focus ◽  
Industrial Partner ◽  
Economic Expectations ◽  
Industrial Collaboration

The first article of this special focus takes issue with some of the recommendations raised by Sharron Thompson Burgmeier (such as her comment that academic collaborators should adjust their economic expectations to those of the industrial partner), while agreeing with many other conclusions in her article.

Optimization of the Mixing Ratio of Two Different Clays Used for Ceramic Roof Tiles

2010 ◽  
Vol 659 ◽  
pp. 477-482
Author(s):  
Róbert Géber ◽  
István Kocserha ◽  
Viktor Orosz ◽  
Andrea Simon ◽  
Csilla Paróczai
Keyword(s):  
Compressive Strength ◽  
Bending Strength ◽  
Mechanical Test ◽  
Mixing Ratio ◽  
Industrial Partner ◽  
Laboratory Vacuum ◽  
Strength Tests ◽  
Brick And Tile ◽  
Mineral Mixtures ◽  
In Virtue Of

Brick- and tile manufacturing is one of the most rapidly developing industries. Professionals are constantly seeking modern technological solutions with which much better and longer lifetime of ceramic roof tiles can be reached. The aim of this R&D work was to optimize the mixing ratio of two different clay minerals of the industrial partner. The Authors have tried to develop a mixture by increasing the mixing ratio of the clay „Jamina”, which reaches or exceeds the mechanical strength and frost-resistance of the ceramic roof tiles which were made according to the present recipe used by the industrial partner. After XRD tests in virtue of preliminary mixture design, the Authors have made clay mineral mixtures that were milled and homogenized in an edge mill for an appropriate grain size. After mixing and homogenizing, samples with different length were made for further investigations with the use of a laboratory vacuum extrusion system. Shrinkage after drying and firing, apparent porosity and water absorption were measured on these samples. Mechanical test were also executed, as well as bending strength tests and compressive strength tests. On the basis of the results of the executed tests, it can be seen that the Authors were successfully developed clay mixtures, with which ceramic roof tiles can be produced with properties that are more favourable than the present mixture used by the industrial partner. The increase of the ratio of ‘Csaba I.’ clay increases the bending and compressive strength of the fired ceramic roof tiles. So the reduction of the amount of clay „Jamina” affects the mechanical properties of the ceramic roof tiles favourably.

scholarly journals MEASUREMENTS ON THE VT 400 AIR TURBINE

2016 ◽  
Vol 56 (2) ◽  
pp. 118-125 ◽  
Author(s):  
Marek Klimko ◽  
Daniel Okresa
Keyword(s):  
Power System ◽  
System Engineering ◽  
Industrial Partner ◽  
One Stage ◽  
Air Turbine ◽  
Power System Engineering

<p class="Abstraktpspvku">This paper presents a basic description of measurements on the experimental air turbine located in the laboratories of the Department of Power System Engineering (KKE). The research on this turbine focuses on the flow in a one-stage air turbine. It monitors the influence of the spatial formation of the blades on the efficiency of the stage. A new geometry with reaction blading is currently being tested. This work has been carried out in cooperation with an industrial partner, Doosan Skoda Power (DSPW).</p>

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