Relevant bibliographies by topics / Sheet Metal Stamping

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Sheet Metal Stamping'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Sheet Metal Stamping"

1

Wang, Xuan Zhi, and Syed H. Masood. "A Study on Tool Wear of Sheet Metal Stamping Die Using Numerical Method." Materials Science Forum 654-656 (June 2010): 346–49. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.346.

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Advanced high strength steels (AHSS) are increasingly used in sheet metal stamping in the automotive industry. In comparison with conventional steels, advanced high strength steel (AHSS) stampings produce higher contact pressures at the interface between draw die and sheet metal blank, resulting in more severe wear conditions, particularly at the draw die radius. The prediction of tool wear patterns for sheet metal stamping die is a highly challenging task as there are many control parameters involved in the production. This paper presents a numerical simulation methodology to analyse the influences of various control parameters on tool wear patterns of a sheet metal stamping die with different die radius arc profiles. The results of tool wear patterns provide informative guidelines for on-site production.
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Shang, Jianhui, and Glenn Daehn. "Electromagnetically assisted sheet metal stamping." Journal of Materials Processing Technology 211, no. 5 (2011): 868–74. http://dx.doi.org/10.1016/j.jmatprotec.2010.03.005.

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Chen, Wei, Ke Pan, Ming Yan Wu, Zhong Fu Huang, and Feng Ze Dai. "The Investigation of Multi-Stage Sheet Metal Stamping Process for Deep Drawing." Advanced Materials Research 189-193 (February 2011): 2675–79. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.2675.

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Based on empirical analysis and FEA modeling of multi-stage sheet metal stamping, the optimal sheet metal stamping process can be supplied. Concurrently, the effects of process parameters on formability are found by numerical simulation. Taking an example of deep drawing part, the results got from the numerical simulation are compared with experimental results, which proves that finite element analysis (FEA) is effective and accurate in optimizing the process design of multi-stage sheet metal progressive stamping.
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Yan, Wen Yi, Michael P. Pereira, and Bernard F. Rolfe. "Tool Wear in Sheet Metal Stamping." Advanced Materials Research 421 (December 2011): 750–53. http://dx.doi.org/10.4028/www.scientific.net/amr.421.750.

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This paper discusses our recent research on wear at the die radius in sheet metal stamping. According to wear theory, contact pressure and sliding distance are the two dominant factors in determining sliding wear. We applied the finite element analysis to accurately quantify the contact pressure and sliding distance at the die radius in sheet metal stamping. The results were then applied to analyze sliding wear at the die radius. We found that a typical two-peak steady-state contact pressure response exists during a channel forming process. The steady-state contact pressure response was preceded by an initial transient response, which produced extremely large and localized contact pressures. We proposed a method to numerically quantify the sliding distance, which was applied to examine the contact sliding distance at the die radius. Correlating the contact pressure and sliding distance, a new insight into the wear/galling that occurs at the die radius in sheet metal stamping was gained. The results show that the region close to zero degrees on the die radius is likely to experience the most wear, with the identified transient stage contributing to a large proportion of the total wear.
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Doolan, M. C., S. Kalyanasundaram, P. Hodgson, and M. Cardew-Hall. "Identifying variation in sheet metal stamping." Journal of Materials Processing Technology 115, no. 1 (2001): 142–46. http://dx.doi.org/10.1016/s0924-0136(01)00754-3.

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Fan, Ya Ping. "Sheet Metal Cover Drawing Forming Process Analysis." Advanced Materials Research 971-973 (June 2014): 191–95. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.191.

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With the rapid development of finite element technique and computer technology, the design of the cold punching mould CAD / CAM with CAE analysis is changing the way that traditional craft manufacture mold, especially the development and application of stamping simulation software, make the stamping die design and processing and quantitative, can advance analysis of stamping process program, finally got the ideal pressing parameter, realize the automation of design, save resources and reduce the dependence on experience and reduce the demand for skilled workers. Based on nonlinear dynamic finite element software ANSYS / ls-dyna continuous function, simulation of sheet metal forming process and unloading plate deformation, forming process, at any time throughout the von mises stress nephogram should rebound results and strain value and unloading plate materials, help us better analysis to understand the changes of the internal material sheet metal stamping process.
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Lan, Jian, Yu Liu, Xi Wei, and Lin Hua. "The Thin Sheet Metal Rubber Pad Stamping for PEM Fuel Cell." Advanced Materials Research 150-151 (October 2010): 1732–40. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.1732.

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Bipolar plate is the key component of proton exchange membrane (PEM) fuel cell and represents a significant part of the overall cost and the total weight in a fuel cell stack. The thin sheet metal, with usually 0.1~0.3mm thickness, deformed to bipolar plate with flow channel 0.5~2mm width and depth, by rubber pad stamping can reduce the cost greatly. The rubber pad is simulated by solid element and hydraulic pressure respectively. Experiment shows that the hydraulic pressure can simulate the rubber pad. The thin sheet metal is modeled by solid element and shell element respectively. Considering thin sheet metal material size effect, the shell element cannot simulate the thin sheet metal stamping process because of small corner radius. Modeling rubber pad by hydraulic pressure and thin sheet metal by solid element, the simulation of the rubber pad stamping process shows that 1) the sheet metal in channel appears large uneven strain with high stress; 2) convex fillet make the sheet metal two direction tensions and should keep large fillet corner. Those simulations are validated by experiments. The research on rubber pad stamping will improve the understanding of this micro forming process and provide design guide of flow channel.
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Wang, Xuan Zhi, and S. H. Masood. "Optimisation of Die Radius Geometry in Sheet Metal Stamping." Advanced Materials Research 337 (September 2011): 350–53. http://dx.doi.org/10.4028/www.scientific.net/amr.337.350.

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Advanced high strength steels (AHSS) are increasingly utilised in sheet metal stamping in the automotive manufacture. In comparison with conventional steels, AHSS stampings produce higher contact pressures at the interface between the tool-workpiece interface, leading to more severe wear conditions, particularly at the draw die radius. To minimise tool wear using this approach it would be necessary to optimise the shape for a particular combination of circular and high elliptical profiles. This paper presents a methodology to optimise a die radius profile. For this, a specialised software routine is developed and compiled for optimisation of die radius profiles to minimise or achieve uniform contact pressure (wear distribution) using Python computer programming language supported by Abaqus software. A detailed algorithm for the optimisation is explained. A case study based on the algorithm is also discussed.
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Gong, Hong Ying, Jin Yan Wang, and Zhong Hua Zhao. "Study on the Springback Characteristics of CR340LA Steel during the Typical Auto Part Stamping Process." Advanced Materials Research 322 (August 2011): 98–101. http://dx.doi.org/10.4028/www.scientific.net/amr.322.98.

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Metal sheet Stamping forming is an important material forming process, especially in the automobile industry. Using the advanced FEM simulation technology, precise analysis of the metal sheet stamping forming process becomes possible, which provides the scientific evaluation of the process design and die design in sheet stamping forming. So the paper chooses a topical auto drawing part-auto indoor-still part and applied the CR340LA steel to have stamping numerical simulation test by the numerical simulation analyzing software-Dynaform. In the stamping numerical simulation test, the best binder holder force values, stamping speed values and the spring back forecast results are got. Then the springback forecast results of the numerical simulation analysis tests are applied to the actual production to overcoming the spring back effectively, and the successful products are got.
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Kasim, Nazrul Idzham, Akhtar Razul Razali, and Mohd Azam Musa. "Positional Accuracy Based on a Load Identification Optimization on a Linear Motor Sheet Forming Feeder." Applied Mechanics and Materials 680 (October 2014): 311–14. http://dx.doi.org/10.4028/www.scientific.net/amm.680.311.

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Precision feeding is essential for micro-stamping, especially in multi-stage progressive forming operations, where necessary feeding rates also have to be maintained. Research in micro-stamping of thinner sheet metals (<100 microns) led to investigations of the performance of existing sheet-metal feeders, regarding their accuracy and repeatability in high speed micro-stamping. The results indicated that the pursuance of higher feeding accuracy and repeatability which aimed at 5-15% of the strip thickness was unachievable with the existing micro-feeders. A new high-precision and high-speed feeder was, therefore, developed for micro-sheet-forming. Initial non-optimized experimental results had showed high accuracy and repeatability were achieved.
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Dissertations / Theses on the topic "Sheet Metal Stamping"

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Shang, Jianhui. "Electromagnetically assisted sheet metal stamping." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1158682908.

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Palaniswamy, Hariharasudhan. "Determination of process parameters for stamping and sheet hydroforming of sheet metal parts using finite element method." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1195621470.

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Yadav, Ajay D. "Process Analysis and Design in Stamping and Sheet Hydroforming." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1210952822.

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Tatipala, Sravan, and Nikshep Reddy Suddapalli. "Integrated Blankholder Plate for Double Action Stamping Die." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-12149.

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A blankholder is used to hold the edges of metal sheet while it is being formed by a matrix and a punch. An efficient way to design a stamping die is to integrate the blankholder plate into the die structure. This would eliminate the time and cost to manufacture blankholder plates. The integrated structure is called integrated blankholder. The main focus of this thesis is structural analysis and optimization of the integrated blankholder. The structural analysis of the integrated blankholder model (used for the production of doors of Volvo car model V70) is performed using Hypermesh and Abaqus. The FE-results were compared with the analytical calculations of the fatigue limit. To increase the stiffness and reduce the stress levels in the integrated blankholder, topology and shape optimization is performed with Optistruct. Thereafter, a CAD model is set up in Catia based on the results of optimization. Finally, structural analysis of this CAD model is performed and the results are compared with the original results. The results show reduction in stress levels by 70% and a more homogeneous stress distribution is obtained. The mass of the die is increased by 17 % and in overall, a stiffer die is obtained. Based on the simulations and results, discussion and conclusions are formulated.
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Pilthammar, Johan. "Elastic Press and Die Deformations in Sheet Metal Forming Simulations." Licentiate thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-15481.

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Never before has the car industry been as challenging, interesting, and demanding as it is today. New and advanced techniques are being continuously introduced, which has led to increasing competition in an almost ever-expanding car market. As the pace and complexity heightens in the car market, manufacturing processes must advance at an equal speed. An important manufacturing process within the automotive industry, and the focus of this thesis, is sheet metal forming (SMF). Sheet metal forming is used to create door panels, structural beams, and trunk lids, among other parts, by forming sheets of metal in press lines with stamping dies. The SMF process has been simulated for the past couple of decades with finite element (FE) simulations, whereby one can predict factors such as shape, strains, thickness, springback, risk of failure, and wrinkles. A factor that most SMF simulations do not currently include is the die and press elasticity. This factor is handled manually during the die tryout phase, which is often long and expensive. The importance of accurately representing press and die elasticity in SMF simulations is the focus of this research project. The research objective is to achieve virtual tryout and improved production support through SMF simulations that consider elastic die and press deformations. Loading a die with production forces and including the deformations in SMF simulations achieves a reliable result. It is impossible to achieve accurate simulation results without including the die deformations. This thesis also describes numerical methods for optimizing and compensating tool surfaces against press and die deformations. In order for these compensations to be valid, it is imperative to accurately represent dies and presses. A method of measuring and inverse modeling the elasticity of a press table has been developed and is based on digital image correlation (DIC) measurements and structural optimization with FE software. Optimization, structural analysis, and SMF simulations together with experimental measurements have immense potential to improve simulation results and significantly reduce the lead time of stamping dies. Last but not least, improved production support and die design are other areas that can benefit from these tools.<br>Aldrig tidigare har bilindustrin varit så utmanande, intressant och spännande som idag. Ny och avancerad teknik introduceras i en allt snabbare takt vilket leder till ständigt ökande konkurrens på en, nästan ständigt, ökande bilmarknad. Den ständigt ökande komplexiteten ställer även krav på tillverkningsprocesserna. En viktig process, som denna licentiatuppsats fokuserar på, är pressning av plåt. Tillverkningstekniken används för att forma plåtar till dörrpaneler, strukturbalkar, motorhuvar, etc. Plåtar formas med hjälp av pressverktyg monterade i plåtformningspressar. Plåtformningsprocessen simuleras sedan ett par decennium tillbaka med Finita Element (FE) simuleringar. Man kan på så sätt prediktera form, töjningar, tjocklek, återfjädring, rynkor, risk för försträckning och sprickor m.m. En faktor som för tillfället inte inkluderas i näst intill alla plåtformningssimuleringar är elastiska press- och verktygsdeformationer. Detta hanteras istället manuellt under, den oftast långa och dyra, inprovningsfasen. Detta projekt har visat på vikten av att representera press och verktygsdeformationer i plåtformningssimuleringar. Detta demonstreras genom en analys av ett verkligt pressverktyg som belastas med produktionskrafter. Det är inte möjligt att uppnå bra simuleringsresultat utan att inkludera verktygsdeformationer i simuleringsmodellen. Uppsatsen beskriver även numeriska metoder för att optimera och kompensera verktygsytor mot press och verktygsdeformationer. För att dessa kompenseringar ska stämma är det viktigt att man representerar både verktyg och press på ett korrekt sätt. Förslag på en metod för att mäta och inversmodellera pressdeformationer har utvecklats, metoden är baserad på mätningar med DIC-systemet ARAMIS och optimering i FE-mjukvaror. Optimering, strukturanalys, och plåtformningsanalys tillsammans med experimentella mätningar har en stor potential att förbättra plåtformningssimuleringar samt reducera ledtiden för pressverktyg. Sist men inte minst, andra positiva effekter är en enklare och smidigare konstruktionsprocess och förbättrad produktionssupport.
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Zhang, Wenfeng. "Design for uncertainties of sheet metal forming process." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1180473874.

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Subramonian, Soumya. "Evaluation of Lubricants for Stamping Deep Draw Quality Sheet Metal in Industrial Environment." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259094400.

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Goniwe, Nicholas Sandisile. "Simulation of a multi-stage forming process to investigate failure in the formed part." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2518.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2016.<br>The purpose of this study is the optimisation of the stamping analysis process in order to investigate the possible reasons for the part failure. (Altan & Vasquez, 2000) have conducted similar research to optimise a forming process. However, they focussed on dies for a forging process and in this study, we are looking at cold forming and this study is also different in that we are trying to reduce the number of stages while maintaining the formability. Formability is based on the dimensional conformance of the final part with additional criteria being the thinning, appearance of wrinkling, dynamic effects leading to the localisation of strain, cracking and residual stress. A numerical modelling procedure that is close enough to the real process is used to investigate the effects of changes in the frictional contact that would correspond to lubrication and also the effect of adding draw beads to the forming tools to change the frictional contact. We also investigated the effect of using a different material in terms of meeting the design requirements. Experimental results for comparison are available for certain of the stamping processes investigated that were tested in pre-production. The finite element simulation is used to account for all residual thinning, stress and strain of the multi-stage forming process to ensure optimum thickness changes of the sheet at each stage. The variations of material and manufacturing parameters are established to accurately predict the behaviour of this specific forming process. The material model required to meet physical experiments is deduced from the results of standard tensile tests and fitted to the Hill’s 48 Law for Work Hardening. The commercial packages Ls-Dyna with Dynaform and Pam-Stamp software are used for the simulation to produce 2 results for comparison.
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Lind, Markus, and Viktor Sjöblom. "Industrial Sheet Metal Forming Simulation with Elastic Dies." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-16782.

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As part of the development process for new stamping dies, in the automotive sheet metal forming (SMF) industry, the majority of all forming operations are simulated with the Finite Element Method (FEM) before the dies are manufactured. Today, these simulations are conducted with rigid tools under the assumption that there are no tool deformations. However, research shows that tool deformations have an influence on the finished product. In real production these deformations are compensated by manual rework during the try-out. Additional reason for simulating with rigid dies is that there are non-existing simulation methods elaborated for elastic stamping dies. Also, simulation of elastic tools requires high computational power.     Since simulations today are performed with rigid stamping dies the purpose of this work is to investigate the conditions of how to conduct SMF-simulations with elastic stamping dies. The object that will be studied is a stamping die for a Volvo XC90 inner door used in a single-action press. This work is part of the development to minimize the manual rework, with the goal to compensate for tool deformations in a virtual environment.    Results for rigid stamping dies in LS-Dyna was compared to currently used AutoForm as a pre-study. A simple model was then created to find a suitable method while using elastic stamping dies. The developed method was used for an industrial size stamping die.     Since there are little amount of research performed on simulations using elastic stamping dies, elasticity and complexity were gradually introduced into the FE-model. As a first step, only the punch was included as an elastic solid. Secondly, the die was added. Finally, the entire die was simulated as elastic together with the hydraulic cushion of the press. When the FE-model worked as expected a suitable method for minimizing the simulation time with acceptable results was studied.     Comparisons of measured- and simulation results show a high correlation. To improve the results from the FE-model factors such as press deformations, advanced friction models, etc. should be included.    Conclusions from this work shows that it is possible to perform SMF-simulations with elastic stamping dies. As the computational time normally is high this work also presents a method first step to reduce the computational time with acceptable results. Comparisons between simulations with rigid and elastic stamping dies proves that there are significant differences in the outcome of the two methods.<br>Reduced Lead Time through Advanced Die Structure Analysis - Vinnova
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Thomas, William J. "Product, Tool, and Process Design Methodology for Deep Drawing and Stamping of Sheet Metal Parts." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1380542371.

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Books on the topic "Sheet Metal Stamping"

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Sheet Metal and Stamping Symposium (1993 Detroit, Mich.). Sheet Metal and Stamping Symposium. The Society, 1993.

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Lim, Yongseob, Ravinder Venugopal, and A. Galip Ulsoy. Process Control for Sheet-Metal Stamping. Springer London, 2014. http://dx.doi.org/10.1007/978-1-4471-6284-1.

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SAE International Congress & Exposition (1989 Detroit, Mich.). Steel stamping technology: Application and impact. Society of Automotive Engineers, 1989.

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Timoshchenko, V. A. Razdelenie listovogo metalla ėlastichnymi sredami. "Shtiint͡s︡a", 1988.

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Ershov, V. I. Sovershenstvovanie formoizmeni͡a︡i͡u︡shchikh operat͡s︡iĭ listovoĭ shtampovki. "Mashinostroenie", 1990.

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Averkiev, A. I͡U. Metody ot͡senki shtampuemosti listovogo metalla. "Mashinostroenie", 1985.

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Engineers, Society of Automotive, ed. Advances and trends in automotive sheet steel stamping. Society of Automotive Engineers, 1988.

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Zhai, Jianjun. Ban liao he xing cai de chong ya yu cheng xing ji shu. Ji xie gong ye chu ban she, 2008.

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Corbin, Russel G. Geometric dimensioning and tolerancing: Elements relative to sheet metal. GM Canada, Chevrolet, Pontiac, Canada Group, 1987.

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Metalform, '94 (1994 Nashville Tenn ). Total process improvement. Precision Metalforming Assocation, 1994.

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Book chapters on the topic "Sheet Metal Stamping"

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Geiger, Manfred, Marion Merklein, and Cornelia Hoff. "Basic Investigations on the Hot Stamping Steel 22MnB5." In Sheet Metal 2005. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-972-5.795.

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Abe, Y., J. Watanabe, and Kenichiro Mori. "Stamping of One-Piece Automobile Steel Wheels from Tube." In Sheet Metal 2007. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-437-5.427.

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Hein, P. "A Global Approach of the Finite Element Simulation of Hot Stamping." In Sheet Metal 2005. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-972-5.763.

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Lim, Yongseob, Ravinder Venugopal, and A. Galip Ulsoy. "Recent Advances in Stamping Control." In Process Control for Sheet-Metal Stamping. Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-6284-1_3.

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Maki, Seijiro, Atsushi Hamamoto, Shouichi Saito, and Kenichiro Mori. "Hot Stamping and Press Quenching of Ultrahigh Strength Steel Sheet Using Resistance Heating." In Sheet Metal 2007. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-437-5.309.

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Lacki, Piotr. "Optimisation of the Stamping Parameters of a Drawn-Part Made of Stainless Steel." In Sheet Metal 2007. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-437-5.349.

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Lim, Yongseob, Ravinder Venugopal, and A. Galip Ulsoy. "Introduction." In Process Control for Sheet-Metal Stamping. Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-6284-1_1.

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Lim, Yongseob, Ravinder Venugopal, and A. Galip Ulsoy. "Equipment and Material Flow Control." In Process Control for Sheet-Metal Stamping. Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-6284-1_2.

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Lim, Yongseob, Ravinder Venugopal, and A. Galip Ulsoy. "Machine Control." In Process Control for Sheet-Metal Stamping. Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-6284-1_4.

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Lim, Yongseob, Ravinder Venugopal, and A. Galip Ulsoy. "Laboratory Development of Process Control." In Process Control for Sheet-Metal Stamping. Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-6284-1_5.

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Conference papers on the topic "Sheet Metal Stamping"

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Xu, S. G., M. L. Bohn, and K. J. Weinmann. "Drawbeads in Sheet Metal Stamping - A Review." In International Congress & Exposition. SAE International, 1997. http://dx.doi.org/10.4271/970986.

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Nakamachi, Eiji, and Robert H. Wagoner. "Development of FEM for Sheet Metal Stamping." In SAE International Congress and Exposition. SAE International, 1988. http://dx.doi.org/10.4271/880528.

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Balakrishnan, Praveen Balaj, Sathya Dev, Deepak Bhuyan, Parvez Syed, and Sarin Babu Thokala. "Die Wear Estimation in Automotive Sheet Metal Stamping." In SAE 2013 World Congress & Exhibition. SAE International, 2013. http://dx.doi.org/10.4271/2013-01-1171.

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Di Pietro, Frank A. "“Laser blank welding and stamping of sheet metal parts”." In ICALEO® ‘92: Proceedings of the Laser Materials Processing Symposium. Laser Institute of America, 1992. http://dx.doi.org/10.2351/1.5058533.

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Zhong, ZHONG,, H. Mao, C. J. Luo, W. Z. Yu, K. He, and R. X. Du. "Simulation and Experimental Study of Corrugated Sheet Metal Stamping." In 2015 International Conference on Industrial Technology and Management Science. Atlantis Press, 2015. http://dx.doi.org/10.2991/itms-15.2015.313.

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Fu, Zhengchun, Ping Hu, Hui-Ping Wang, and Kunmin Zhao. "Design of a Stamping Test for Investigating Surface Distortion in Sheet Metal Parts." In ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME/ASME International Conference on Materials and Processing. ASMEDC, 2008. http://dx.doi.org/10.1115/msec_icmp2008-72478.

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Surface distortions/deflections are frequently introduced into the Class “A” surfaces during sheet metal stamping processes. However, the origins of the draw die related surface distortion/deflection have not been well understood. This paper presents our design of a stamping test for the investigation of the distortion phenomenon. Five geometric parameters are first identified to represent basic geometry of typical automobile outer panel depression features around the surface distortions. Experimental stamping dies are then designed to reflect various combinations of these five geometric parameters with the assistance of numerical simulations to ensure that the designed dies are able to replicate the surface distortion phenomenon. Also, real-time dynamic measurement techniques are designed to collect historical data of strains and deflection on the stamping panels. Our preliminary tryouts show that the designed stamping test successfully replicates the distortion phenomenon observed in production stamping processes. It provides a platform for the investigation of the root-cause of the draw die related surface distortions.
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7

Cooper, Daniel R., Kathleen E. Rossie, and Timothy G. Gutowski. "An Environmental and Cost Analysis of Stamping Sheet Metal Parts." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8880.

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Little work has been done on quantifying the environmental impacts and costs of sheet metal stamping. In this work we present models that can be used to predict the energy requirements, global warming potential, human health impacts, and costs of making drawn parts using zinc (kirksite) die-sets and hydraulic or mechanical presses. The methodology presented can also be used to produce models of stamping using other die materials, such as iron, for which casting data already exists. An unprecedented study on the environmental impacts and costs of zinc die-set production was conducted at a leading Michigan die-maker. This analysis was used in conjunction with electrical energy measurements on forming presses to complete cradle-to-gate impact and cost analyses on producing small batch size hood and tailgate parts. These case studies were used to inform a generalized model that allows engineers to predict the impacts and costs of forming based on as little information as the final part material, surface area, thickness and batch size (number of units produced). The case studies show that press electricity is an insignificant contributor to the overall impacts and costs. The generalized models highlight that while costs for small batch production are dominated by the die-set, the environmental impacts are often dominated by the sheet metal. These findings explain the motivation behind research into die-less forming processes such as incremental sheet forming, and emphasize the need to minimize sheet metal scrap generation in order to reduce environmental impacts.
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8

Peker, M. F., Ö. N. Cora, and M. Koç. "Surface Topography Evolution During Long-Run Micro-Stamping of Bipolar Plates (BPPs) and Effects on Corrosion and Contact Resistance Characteristics." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-85461.

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Micro-stamping, as a promising sheet metal forming process for mass production of small parts, can meet the expectations such as durability, strength, surface finish, and low cost for miniaturized metal products and features. The purpose of this research was set to investigate surface interactions during mass manufacturing of micro-stamped sheets, and its consequences; then establish correlations (if any) between surface interactions vs. corrosion and contact resistance of bipolar plates (BPPs) to be used in proton exchange membrane fuel cells (PEMFC). In experimental part of this study, 10,000 SS316L sheet blanks were micro-stamped using a stamping die set with 750 μm-deep micro-channels under 200 kN stamping force, and with a constant stamping speed of 1mm/s. Surface inspections (surface roughness and micro-channel height measurements), corrosion and contact resistance tests were carried out on BPPs. Analysis of variance (ANOVA) technique was utilized to investigate the significance of surface roughness, channel heights, corrosion and contact resistance variations for BPPs. Moreover, three-dimensional (3D) finite element models of micro-stamping process were established to approximate the stress and strain levels as well as coefficient of friction value experienced at contact interface. The results revealed that the roughness values for micro-stamping dies and BPPs followed similar trends during 10,000 micro-stampings. Since surface defects trigger corrosion, the correlation between surface roughness and corrosion resistance of BPPs was found to be direct. Increasing number of surface irregularities (asperities) lowered contact surface area that resulted in increased contact resistance. Finally, comparison of experimental and numerical channel height values showed that the coefficient of friction did not change considerably during the mass production of BPPs, at least within the 10,000 stamping cycle.
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9

Buranathiti, Thaweepat. "Probabilistic Design in a Sheet Metal Stamping Process under Failure Analysis." In NUMISHEET 2005: Proceedings of the 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Process. AIP, 2005. http://dx.doi.org/10.1063/1.2011331.

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10

Wang, Wu-Rong, and Guan-Long Chen. "The Optimization of Variable Blank Holder Force for Sheet Metal Stamping." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21020.

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This paper focuses on the research of blank holding force (BHF) and proposes a new strategy to optimize the variable BHF and determine the drawing limit under the variable BHF. The optimization strategy is based on the analysis of BHF formability window and integrated into FEM code to obtain time or/and spatial optimal BHF that applies on binders. And then a stepped rectangular box of 60 mm drawing height with segmented binders and a cylinder cup without die bottom are adopted to validate the optimization strategy. Firstly, constant BHF FEM simulations through careful experiment design are conducted to discover the drawing limit height under maximum constant BHF. Secondly, FEM simulation combining the new BHF optimization strategy is carried and the optimal profile of variable BHF is determined for both step box and cylinder cup during the whole punch stroke. The result shows this stepped box could be formed successfully using 5754-0 aluminum alloy sheet, while the maximum drawing height under constant BHF is 45mm. And the drawing limit of cylinder box under optimal BHF could reach the drawing height of 61mm, which is greatly increased comparing with maximum of 47mm under constant BHF. Finally, the constant BHF experiment and the derived trajectory of optimal BHF of both geometries are verified on a multipoint variable BHF hydraulic press and the experiment results correspond well with those of FEM simulation. This new BHF optimization strategy not only helps to determine time and spatial optimal BHF for known geometry, but also assists to design maximum drawing height for unknown geometry, which makes it an effective method.
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