Research on the Friction Properties of DP600 Stainless Steel as a Function of Bending Angle and Pin Diameter

[EN] The rapid evolution of materials and manufacturing processes, driven by global competition and new safety and environmental regulations has had an impact on automotive structures (Body In White; BIW) manufacturing. The need for lighter vehicles, with more equipment, that are safer and eco-friendly at the same time, relates to the entire life cycle of the car. Car and steelmakers agree that weight reduction is possible, and the solution involves the use of new advanced high-strength steels. Thinner and stronger materials lead to higher demands on stamping, the most used manufacturing in BIW parts. The use of advanced high-strength steels raises new challenges, especially concerning the lubrication between the die and the sheet. To study the lubrication conditions of the stamping process, a sheet metal forming a simulator was developed. The simulator consists of two cylinders that pull the strip of steel and a pin in between. The angle between the cylinders can be adjusted from 0 to 90 degrees, which allows analysis of the effect of the stamping angle. The pull force and velocity can be set and measured, and the peripheric pin velocity, the strain, and the strain velocity can be measured as well. In this work, the tribological properties of Dual-Phase 600 stainless steel using different processing conditions have been analyzed. To this end, a factorial experiments design with twelve parameters that compare the behavior of different angles and diameters was run. The results showed that the friction coefficient increases by increasing the bending angle and decreases with pin diameter.Sanchez-Caballero, S.; Sellés, M.; Pla-Ferrando, R.; Segui Llinares, VJ.; Peydro, MA. (2021). Research on the Friction Properties of DP600 Stainless Steel as a Function of Bending Angle and Pin Diameter. Materials Proceedings. 3(1):1-7. https://doi.org/10.3390/IEC2M-09248173

Application of concurrent engineering in product and process design

Traditional methods applied to the development of new products are becoming obsolete, being necessary advanced methods based on a new approach that allows work cooperatively. This is called Concurrent Engineering and this paper intends to carry out a review of the integration of this discipline in the new ways of working. The main objective of the new forms of work is to systematize the design by interdisciplinary teams simultaneously working the products, the processes, getting the right design, with a corresponding reduction in costs and time. The introduction of CAPP systems (Computer Aided Process Planning) facilitates process design tools. Therefore, some previous work incorporating such systems are included.Juárez Varón, D.; Segui Llinares, VJ.; Mengual Recuerda, A.; Ferrándiz Bou, S. (2015). Application of concurrent engineering in product and process design. Annals of The University of Oradea. Fascicle of Management and Technological Engineering. (3):77-80. http://hdl.handle.net/10251/65945S7780

Processing and Characterization of Environmentally Friendly Composites from Biobased Polyethylene and Natural Fillers from Thyme Herbs

[EN] The main aim of this research work is to assess the potential of a distillery waste from thyme as multifunctional filler in natural fiber reinforced plastics (NFRP) with biobased polyethylene matrix. Several ethylene-based copolymers with different co-monomers (vinyl alcohol, methyl methacrylate, glycidyl methacrylate and acrylic acid) were used as compatibilizer agents to overcome the lack of compatibility between the highly hydrophobic matrix and the highly hydrophilic lignocellulosic filler. The effect of the compatibilizer type and amount, as well as the lignocellulosic filler content was followed by thermal, mechanical, morphological and rheological characterizations. In addition to the typical filler effect, thyme also provides a remarkable increase in thermal stability at moderate temperatures with a positive effect on widening the processing window. The compatibilizer agent that offers best balanced properties is the glycidyl methacrylate copolymer with a noticeable increase in stiffness, flexural and tensile strength. Regarding processability, the viscosity increases with the filler content. This is highly important at low shear rates but the effect is almost negligible at high shear rates typical of injection molding processes.This research was supported by the Ministry of Economy and Competitiveness-MINECO through the grant number MAT2014-59242-C2-1-R. Authors also wish to thank "Licores Sinc, S.A." for kindly supplying the Thymus moroderi wastes.Montanes, N.; Garcia-Sanoguera, D.; Segui Llinares, VJ.; Fenollar, O.; Boronat, T. (2018). Processing and Characterization of Environmentally Friendly Composites from Biobased Polyethylene and Natural Fillers from Thyme Herbs. 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Concurrent engineering applied to key industrial sectors

The use of advanced techniques in work, such as concurrent engineering, on the development of projects implies that all areas involved participate from the start of the primary phases. Getting a correct product is the main target, with an estimated term and controlled and reduced costs. Working with a complex product within a context in design and manufacturing in a company in a highly competitive market, involves the problem domain as a key issue. In this paper, the development of concurrent engineering is discussed in various industrial sectors, complex sectors with high competence, that require tools and a vision aimed towards the optimization of design and development of the products that are carried out in these industrial sectors.Juárez Varón, D.; Segui Llinares, VJ.; Mengual Recuerda, A.; Ferrándiz Bou, S. (2015). Concurrent engineering applied to key industrial sectors. Annals of The University of Oradea. Fascicle of Management and Technological Engineering. (3):81-84. http://hdl.handle.net/10251/659468184

Using information and communication technologies in computer programming of activities in flexible manufacturing cells using petri nets

[EN] A very useful tool for the programming of tasks in flexible manufacturing cells is the Petri nets. Like a representation tool, it allows modelling and analyzing the properties of any designed system to work in parallel, being able to create graphically a scheme that allows to visualize the system and to simulate the evolution of the same one before its real execution. This way a programming of computer science character for one more a more graphical programming is avoided, being able with no need to resort to her of ample knowledge on numerical control and flexible manufacturing systems[ES] Una herramienta muy útil para la programación de actividades en células de fabricación flexible son las Redes de Petri. Como herramienta de representación, permiten modelizar y analizar las propiedades de cualquier sistema diseñado para trabajar en paralelo, pudiéndose crear gráficamente un esquema que permite visualizar el sistema y simular la evolución del mismo antes de su ejecución real. De esta manera se evita una programación de carácter informático en pro de una programación más gráfica, pudiendo recurrir a ella sin necesidad de amplios conocimientos sobre control numérico y sistemas de fabricación flexible.Juárez Varón, D.; Peydro, MA.; Reig Pérez, MJ.; Segui Llinares, VJ. (2012). Empleo de tecnologías de la información y comunicación en la programación por ordenador de actividades en células de fabricación flexible mediante redes de Petri. 3c Tic. (2):43-50. http://hdl.handle.net/10251/34374S4350

Finite elements analysis and multiobjective optimization: A way to reduce material and manufacturing cost

The aim of this paper is to introduce a method to reduce the weight in structures which are subjected to multiple restrictions like deformation, max allowable stress, natural frequency, etc.. The method is shown through the analysis of an aluminum bracket, whose maximum stress and deformation is well defined. The analysis is done using the Structural and Design of Experiments modules of Ansys Workbench v12.1. As result of the method a weight reduction of 50,2% is achieved.Sanchez-Caballero, S.; Sellés Cantó, MÁ.; Pla-Ferrando, R.; Segui Llinares, VJ. (2012). Finite elements analysis and multiobjective optimization: A way to reduce material and manufacturing cost. AIP Conference Proceedings. 1431:719-724. doi:10.1063/1.4707628S719724143

Advanced high strength steel (AHSS) TWIP: A door to the future in metal forming

The last decades have been characterized by a fast evolution of cars. This work shows the evolution of vehicle weight. It shows the response of car manufacturers using new materials and production methods that allow lighter vehicles with lower consumption, cheaper and with lower influence on the greenhouse effect. One of the materials which means a most interesting change is the TWIP steel. This material is characterized by its high strength, his exceptional strain and excellent formability as well as lower energy consumption in their manufacture. TWIP steel are changing towards cheaper compositions and higher performance, and it's going to be great influence in the vehicle weight reduction in the next years.Pla-Ferrando, R.; Sanchez-Caballero, S.; Reig Pérez, MJ.; Sellés Cantó, MÁ.; Segui Llinares, VJ. (2012). Advanced high strength steel (AHSS) TWIP: A door to the future in metal forming. AIP Conference Proceedings. 1431:65-73. doi:10.1063/1.4707551S6573143

Modelization of three-layered polymer coated steel-strip ironing process using a neural network

[EN] An alternative to the traditional can manufacturing process is to use plastic laminated rolled steels as base stocks. This material consist of pre-heated steel coils that are sandwiched between one or two sheets of polymer. The heated sheets are then immediately quenched, which yields a strong bond between the layers. Such polymer-coated steels were investigated by Jaworski [1,2] and Sellés [3], and found to be suitable for ironing with carefully controlled conditions. A novel multi-layer polymer coated steel has been developed for container applications. This material presents an interesting extension to previous research on polymer laminated steel in ironing, and offers several advantages over the previous material (Sellés [3]). This document shows a modelization for the ironing process (the most crucial step in can manufacturing) done by using a neural networkThis work was supported by the “Universitat Politècnica de València” [grant number PAID-06-10-003-305]Sellés Cantó, MÁ.; Schmid, S.; Sanchez-Caballero, S.; Segui Llinares, VJ.; Reig Pérez, MJ.; Pla-Ferrando, R. (2012). Modelization of three-layered polymer coated steel-strip ironing process using a neural network. AIP Conference Proceedings. 1431:733-739. https://doi.org/10.1063/1.4707630S733739143

Análisis de aceros AHSS en el nuevo simulador de deformación plástica HSMFS

El presente documento muestra las capacidades del nuevo simulador de deformación plástica, de reciente construcción, y capaz de realizar ensayos en cualquier tipo de material, hasta una fuerza de 10 kN. Además, se exponen otras líneas de investigación del grupo.Sellés Cantó, MÁ.; Sanchez-Caballero, S.; Pla-Ferrando, R.; Reig Pérez, MJ.; Segui Llinares, VJ.; Eixerés Tomás, B.; Pérez Bernabeu, E. (2013). Análisis de aceros AHSS en el nuevo simulador de deformación plástica HSMFS. Compobell, S.L. http://hdl.handle.net/10251/73772

Diseño y posicionado de la prótesis inversa de hombro utilizando técnicas de simulación numérica por método de los elementos ¿nitos y biomodelos realizados por impresión 3D

Analizar el posicionado y orientación de la prótesis inversa de hombro (PIH) en la escápula, y mejorar su anclaje y adaptación utilizando técnicas de Simulación Numérica por metodología de elementos finitos (FEM) y biomodelos realizados por impresión 3D. Métodos. Mediante la TAC de un paciente intervenido de PIH se genera un biomodelo 3D-virtual. Se estudia el conjunto placa base-escápula mediante software FEM simulando el comportamiento mecánico, comparando la intervención frente a unas condiciones de excentricidad de 4 mm y lateralización de 5mm. Se analizan las tensiones y deformaciones ejercidas. Resultados. Se obtiene una reducción de los esfuerzos mecánicos en la placa base de 23,7%. Se diseña un dispositivo de centrado-guía, elaborado mediante la técnica de impresión 3D. Conclusión. El modelado y análisis FEM de la morfología del hombro del paciente y su biomodelo 3D ayudan a una óptima planificación pre-operatoria. La impresión de guías 3D puede mejorar el posicionamiento y anclaje de la placa base de la PI