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Guillermo Guerrero-Vaca
Department of Mechanical Engineering, University of Córdoba, Rabanales Campus, Leonardo da Vinci Building, Carretera Madrid-Cádiz, km 396, E-14071, Córdoba, Spain

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Journal article
Published: 17 July 2021 in CIRP Journal of Manufacturing Science and Technology
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Aluminium alloys are widely used in manufacturing of parts by subtraction of a high percentage of the initial volume. CAD-CAM offers dynamic roughing strategies as trochoidal toolpath, based in the principle of low values of the cutting forces and heat dissipation due to inherent intermittent cut. In this work, the deep slot milling process of EN AW 2024-T3 aluminium alloy by a stretched trochoidal toolpath, using a tool with variable helix angle and chip splitter, has been evaluated through a factorial design of experiments with the aim of stablish the optimisation rules for this solution. The material removal rate (MRR), surface roughness (Ra) and electric energy consumption (EEC) were analysed within the recommended range of the machining conditions. The results revealed the cutting speed (vc) and feed/tooth (fz) as the most influential factors in MRR, while the surface quality was mainly affected by the radial depth of cut (ae) and feed/tooth (fz). The electric energy consumption depends mainly on vc and fz. Linear regression models were generated from the results which have been shown good reliability to predict and optimize MRR, EEC and Rawall and Rabottom. Three additional experiments validated the models showing minimum errors lower than 5 % for MRR and Rawall and around 10 % for EEC and Rabottom between experimental and predicted results.

ACS Style

O. Rodriguez-Alabanda; G. Guerrero-Vaca; E. Molero; P.E. Romero. Experimental analysis of deep slot milling in EN AW 2024-T3 alloy by stretched trochoidal toolpath and variable helix angle tool. CIRP Journal of Manufacturing Science and Technology 2021, 35, 346 -360.

AMA Style

O. Rodriguez-Alabanda, G. Guerrero-Vaca, E. Molero, P.E. Romero. Experimental analysis of deep slot milling in EN AW 2024-T3 alloy by stretched trochoidal toolpath and variable helix angle tool. CIRP Journal of Manufacturing Science and Technology. 2021; 35 ():346-360.

Chicago/Turabian Style

O. Rodriguez-Alabanda; G. Guerrero-Vaca; E. Molero; P.E. Romero. 2021. "Experimental analysis of deep slot milling in EN AW 2024-T3 alloy by stretched trochoidal toolpath and variable helix angle tool." CIRP Journal of Manufacturing Science and Technology 35, no. : 346-360.

Proceedings
Published: 11 December 2020 in Proceedings
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Electrolytic tough pitch copper is commonly used in electric and electronic applications while fine copper wires are widely used in electronic conductors. A multi-pass wiredrawing process was designed for the manufacturing of fine pure copper wire, from 0.50 mm to 0.10 mm in diameter. The analytical model and the finite element analysis (FEA) were performed to validate the pass schedule design. The initial wire was mechanically characterized, and the pass schedule design was stablished by the analytical method according to the specific criteria. The sequence of wiredrawing passes was modeled in the finite element method (FEM) software in order to analyze and validate the designed pass schedule. The combination of these methods allowed designing and validating the wiredrawing pass schedule to implement it in a real process with guaranteed results. This work contributes in showing a combined methodology for the design and virtual validation of the pass schedule in the case of multistage wiredrawing of ETP copper fine wires.

ACS Style

Oscar Rodríguez-Alabanda; Esther Molero; Marius Tintelecan; Guillermo Guerrero-Vaca; Pablo E. Romero; Gustavo Aristides Santana Martinez. Fine Electrolytic Tough Pitch Copper Multistage Wiredrawing Pass Schedule Design by Analytical and Numerical Methods. Proceedings 2020, 63, 12 .

AMA Style

Oscar Rodríguez-Alabanda, Esther Molero, Marius Tintelecan, Guillermo Guerrero-Vaca, Pablo E. Romero, Gustavo Aristides Santana Martinez. Fine Electrolytic Tough Pitch Copper Multistage Wiredrawing Pass Schedule Design by Analytical and Numerical Methods. Proceedings. 2020; 63 (1):12.

Chicago/Turabian Style

Oscar Rodríguez-Alabanda; Esther Molero; Marius Tintelecan; Guillermo Guerrero-Vaca; Pablo E. Romero; Gustavo Aristides Santana Martinez. 2020. "Fine Electrolytic Tough Pitch Copper Multistage Wiredrawing Pass Schedule Design by Analytical and Numerical Methods." Proceedings 63, no. 1: 12.

Journal article
Published: 06 April 2020 in Polymers
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In the present work, ten data mining algorithms have been used to generate models capable of predicting the surface roughness of parts printed on polylactic acid (PLA) by using fused deposition modeling (FDM). The models have been trained using experimental data measured on 27 horizontal (XY) and 27 vertical (XZ) specimens, printed using different values for the parameters studied (layer height, extrusion temperature, print speed, print acceleration and flow). The models generated by multilayer perceptron (MLP) and logistic model trees (LMT) have obtained the best results in a cross-validation. Although it does not obtain such optimal results, the J48 algorithm (C4.5) allows the generation of models in the form of a decision tree. These trees permit to determine which print parameters have an influence on the surface roughness. For XY specimens, the surface roughness measured in the direction parallel to the extrusion path (Ra,0,XY ) depends on the flow, the print temperature and the layer height; in the direction perpendicular to the extrusion path, the surface roughness (Ra,90,XY) depends only on the flow. For XZ specimens, the surface roughness measured in the direction parallel to the extrusion path (Ra,0,XZ) depends only on the print speed; in the direction perpendicular to the extrusion path (Ra,90,XZ), it depends on the layer height and the extrusion temperature. According to the study carried out, the most suitable set up provides values of Ra,0,XY, Ra,90,XY, Ra,0,XZ and Ra,90,XZ equal to 0.46, 1.18, 0.45 and 11.54, respectively. A practical application of this work is the manufacture of PLA frame glasses using FDM.

ACS Style

Esther Molero; Juan Jesús Fernández; Oscar Rodríguez-Alabanda; Guillermo Guerrero-Vaca; Pablo E. Romero. Use of Data Mining Techniques for the Prediction of Surface Roughness of Printed Parts in Polylactic Acid (PLA) by Fused Deposition Modeling (FDM): A Practical Application in Frame Glasses Manufacturing. Polymers 2020, 12, 840 .

AMA Style

Esther Molero, Juan Jesús Fernández, Oscar Rodríguez-Alabanda, Guillermo Guerrero-Vaca, Pablo E. Romero. Use of Data Mining Techniques for the Prediction of Surface Roughness of Printed Parts in Polylactic Acid (PLA) by Fused Deposition Modeling (FDM): A Practical Application in Frame Glasses Manufacturing. Polymers. 2020; 12 (4):840.

Chicago/Turabian Style

Esther Molero; Juan Jesús Fernández; Oscar Rodríguez-Alabanda; Guillermo Guerrero-Vaca; Pablo E. Romero. 2020. "Use of Data Mining Techniques for the Prediction of Surface Roughness of Printed Parts in Polylactic Acid (PLA) by Fused Deposition Modeling (FDM): A Practical Application in Frame Glasses Manufacturing." Polymers 12, no. 4: 840.

Journal article
Published: 10 February 2020 in Materials
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Polytetrafluoroethylene (PTFE) coatings are used in many applications and processing industries. With their use, they wear out and lose properties and must be replaced by new ones if the cost of the element so advises. There are different stripping techniques, but almost all of them are very difficult and require strict environmental controls. It is a challenge to approach the process through efficient and more sustainable techniques. In the present work, we have studied the stripping of PTFE coatings by projection with abrasives (1 step) as an alternative to carbonization + sandblasting procedures (2 steps). For this purpose, different types of abrasives have been selected: brown corundum, white corundum, glass microspheres, plastic particles, and a walnut shell. The tests were performed at pressures from 0.4 to 0.6 MPa on PTFE-coated aluminium substrates of EN AW-5182 H111 alloy. Stripping rates, surface roughness, and substrate hardness have been studied. Scanning electron microscopy (SEM) images of sandblasted specimens have also been obtained. All abrasives improved mechanical and surface properties in one-step vs. two-step processes. The abrasives of plastic and glass microspheres are the most appropriate for the one-step process, which increases the hardness and roughness level Ra in the substrate. Corundum abrasives enable the highest stripping rates.

ACS Style

Guillermo Guerrero-Vaca; David Carrizo-Tejero; Óscar Rodríguez-Alabanda; Pablo E. Romero; Esther Molero. Experimental Study for the Stripping of PTFE Coatings on Al-Mg Substrates Using Dry Abrasive Materials. Materials 2020, 13, 799 .

AMA Style

Guillermo Guerrero-Vaca, David Carrizo-Tejero, Óscar Rodríguez-Alabanda, Pablo E. Romero, Esther Molero. Experimental Study for the Stripping of PTFE Coatings on Al-Mg Substrates Using Dry Abrasive Materials. Materials. 2020; 13 (3):799.

Chicago/Turabian Style

Guillermo Guerrero-Vaca; David Carrizo-Tejero; Óscar Rodríguez-Alabanda; Pablo E. Romero; Esther Molero. 2020. "Experimental Study for the Stripping of PTFE Coatings on Al-Mg Substrates Using Dry Abrasive Materials." Materials 13, no. 3: 799.

Journal article
Published: 20 November 2019 in Coatings
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Aluminum-magnesium (Al-Mg) alloy and aluminum-coated steel (aluminized steel) are typically used for the manufacturing of baking trays and molds. For these applications, these materials must be modified to develop release and hydrophobic properties. With this aim, the bare substrates are typically coated with low-surface energy materials such as fluoropolymers, elastomers, or sol-gel layers. In this work, some alternative strategies to prepare these functional surfaces are presented. We used three-step processes involving (i) micro-texturing, (ii) nano layer deposition through immersion and electrodeposition, and (iii) hydrophobization. The raw substrates were sanded or sandblasted at the micro scale, accordingly. Texturization at the nano scale was achieved with a cerium layer formed by electrodeposition or solution immersion. The cerium layers were hydrophobized with fatty acids. The wetting properties of the samples were studied with tilting-plate and bouncing drop methods. We measured the surface roughness of the samples by contact profiling and analyzed their surface morphology using a field emission scanning electron microscope (FESEM). The elemental chemical composition of the samples was analyzed by energy-dispersive X-ray spectroscopy (EDX). The wettability results indicated that the best performance for the Al-Mg substrates was reached by sandblasting and later immersion in a cerium nitrate solution. For aluminized steel substrates, the best results were obtained with both electrodeposition and immersion methods using a cerium chloride solution.

ACS Style

Guillermo Guerrero-Vaca; Miguel A. Rodríguez-Valverde; Pedro Castilla-Montilla; Francisco Alguacil-Salamanca; Óscar Rodríguez-Alabanda; Pablo E. Romero; Esther Molero-Romero; F. Javier Montes Ruiz-Cabello; F. Montes Ruiz-Cabello. Superhydrophobic Cerium-Based Coatings on Al-Mg Alloys and Aluminized Steel. Coatings 2019, 9, 774 .

AMA Style

Guillermo Guerrero-Vaca, Miguel A. Rodríguez-Valverde, Pedro Castilla-Montilla, Francisco Alguacil-Salamanca, Óscar Rodríguez-Alabanda, Pablo E. Romero, Esther Molero-Romero, F. Javier Montes Ruiz-Cabello, F. Montes Ruiz-Cabello. Superhydrophobic Cerium-Based Coatings on Al-Mg Alloys and Aluminized Steel. Coatings. 2019; 9 (12):774.

Chicago/Turabian Style

Guillermo Guerrero-Vaca; Miguel A. Rodríguez-Valverde; Pedro Castilla-Montilla; Francisco Alguacil-Salamanca; Óscar Rodríguez-Alabanda; Pablo E. Romero; Esther Molero-Romero; F. Javier Montes Ruiz-Cabello; F. Montes Ruiz-Cabello. 2019. "Superhydrophobic Cerium-Based Coatings on Al-Mg Alloys and Aluminized Steel." Coatings 9, no. 12: 774.

Journal article
Published: 24 October 2019 in Polymers
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Fluoropolymers such as PFA are used as coatings for the protection of metal substrates due to their high chemical inertia and non-stick properties. These are “wear and tear” coatings and they degrade, at which point they should be removed for a new application. The removal of these types of coating by laser is of interest due to the process’s flexibility, precision, ease of automation, and environmental sustainability. The efficiency of the procedure was shown with the use of a source in a pulsed Nd:YAG and a source in continuous mode of fiber (Yb). The rates of stripping (cm2/min) and fluence (J/cm2) were analyzed and related to the power of the laser sources. Variations of the substrate after stripping were studied: roughness and hardness. The properties of the coating, thickness, roughness, water sliding angle, and microhardness were also evaluated. It was concluded that the laser in continuous mode was more efficient than the pulsed laser; laser removal of fluoropolymers has a strong relationship with reflectivity, and the mechanical and surface properties of the substrate after stripping remained virtually unchanged.

ACS Style

Guillermo Guerrero-Vaca; Óscar Rodríguez-Alabanda; Pablo E. Romero; Carlos Soriano; Esther Molero; Jon Lambarri. Stripping of PFA Fluoropolymer Coatings Using a Nd:YAG Laser (Q-Switch) and an Yb Fiber Laser (CW). Polymers 2019, 11, 1738 .

AMA Style

Guillermo Guerrero-Vaca, Óscar Rodríguez-Alabanda, Pablo E. Romero, Carlos Soriano, Esther Molero, Jon Lambarri. Stripping of PFA Fluoropolymer Coatings Using a Nd:YAG Laser (Q-Switch) and an Yb Fiber Laser (CW). Polymers. 2019; 11 (11):1738.

Chicago/Turabian Style

Guillermo Guerrero-Vaca; Óscar Rodríguez-Alabanda; Pablo E. Romero; Carlos Soriano; Esther Molero; Jon Lambarri. 2019. "Stripping of PFA Fluoropolymer Coatings Using a Nd:YAG Laser (Q-Switch) and an Yb Fiber Laser (CW)." Polymers 11, no. 11: 1738.

Journal article
Published: 19 September 2019 in Metals
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For the wiredrawing of aluminium, the initial wire rod is obtained by continuous inverted casting. The raw geometry is industrially processed in a linear multi-step wiredrawing sequence to obtain a wire that is commonly used for the manufacture of electrical conductors. In the present work a complete study of the material has been made. The experimental procedure consisted in the realization of a sequence of section reduction stages in the laboratory, a sequence designed following the technological criteria recommended by the manufacturer of the drawing machine in which the industrial process will be implemented. From the specimens corresponding to each reduction step, it has been possible to know the evolution of the main mechanical properties when this pure aluminium is processed by wiredrawing. This information has led to establish the hardening law by which it is possible characterize the plastic behaviour of this pure metal when it is transformed by this specific sequential process of cold forming. The strain hardening law has been implemented in a numerical simulation software application and the experimental setup has been simulated for its validation. Finally, the classic analytical solution founded in the “slab method” has been applied for the design of a proposal for the optimization of the industrial wiredrawing process.

ACS Style

Óscar Rodríguez-Alabanda; Pablo E. Romero; Esther Molero; Guillermo Guerrero-Vaca. Analysis, Validation and Optimization of the Multi-Stage Sequential Wiredrawing Process of EN AW-1370 Aluminium. Metals 2019, 9, 1021 .

AMA Style

Óscar Rodríguez-Alabanda, Pablo E. Romero, Esther Molero, Guillermo Guerrero-Vaca. Analysis, Validation and Optimization of the Multi-Stage Sequential Wiredrawing Process of EN AW-1370 Aluminium. Metals. 2019; 9 (9):1021.

Chicago/Turabian Style

Óscar Rodríguez-Alabanda; Pablo E. Romero; Esther Molero; Guillermo Guerrero-Vaca. 2019. "Analysis, Validation and Optimization of the Multi-Stage Sequential Wiredrawing Process of EN AW-1370 Aluminium." Metals 9, no. 9: 1021.

Journal article
Published: 28 April 2019 in Coatings
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Fluoropolymer-based coatings are widely used for release applications. However, these hydrophobic surfaces do not reveal a significantly low adhesion. Water repellency incorporated to fluoropolymer coatings might enhance their release performance. In this work, we focused on the surface texturing of a well-known polytetrafluoroethylene (PTFE)-based coating. We explored as texturing routes: sanding, sandblasting and laser ablation. We examined the surface roughness with white light confocal microscopy and the surface morphology with environmental scanning electron microscopy (ESEM). Water-repellent fluoropolymer coatings were reproduced in all cases, although with different degree, parametrized with bounces of water drops (4–5 μL). Laser ablation enabled the lowest adhesion of coatings with 24 ± 2 bounces. This result and the current development of laser patterning for industry assure the incipient use of laser ablation for release coatings.

ACS Style

Guillermo Paz-Gómez; Juan Carlos Del Caño-Ochoa; Oscar Rodríguez Alabanda; Pablo E. Romero; Miguel Cabrerizo-Vílchez; Guillermo Guerrero; Miguel Angel Rodríguez-Valverde; Paz- Gómez; Caño- Ochoa; Rodríguez- Alabanda; Cabrerizo- Vílchez; Guerrero- Vaca; Rodríguez- Valverde. Water-Repellent Fluoropolymer-Based Coatings. Coatings 2019, 9, 293 .

AMA Style

Guillermo Paz-Gómez, Juan Carlos Del Caño-Ochoa, Oscar Rodríguez Alabanda, Pablo E. Romero, Miguel Cabrerizo-Vílchez, Guillermo Guerrero, Miguel Angel Rodríguez-Valverde, Paz- Gómez, Caño- Ochoa, Rodríguez- Alabanda, Cabrerizo- Vílchez, Guerrero- Vaca, Rodríguez- Valverde. Water-Repellent Fluoropolymer-Based Coatings. Coatings. 2019; 9 (5):293.

Chicago/Turabian Style

Guillermo Paz-Gómez; Juan Carlos Del Caño-Ochoa; Oscar Rodríguez Alabanda; Pablo E. Romero; Miguel Cabrerizo-Vílchez; Guillermo Guerrero; Miguel Angel Rodríguez-Valverde; Paz- Gómez; Caño- Ochoa; Rodríguez- Alabanda; Cabrerizo- Vílchez; Guerrero- Vaca; Rodríguez- Valverde. 2019. "Water-Repellent Fluoropolymer-Based Coatings." Coatings 9, no. 5: 293.

Journal article
Published: 12 January 2019 in Polymers
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The coatings with fluoropolymer resins rich in fluorinated ethylene propylene (FEP) and polytetrafluoroethylene (PTFE) are applied as anti-adherent coatings on aluminum–magnesium substrates for use in food containers. In many cases, due to wear, they must be stripped for the application of a new coating on the same substrate. There are several processes for this: blasting, plasma, pyrolysis, chemical processes, laser, high pressure water, and combinations of these. This work focuses on the characterization of the main factors that condition the FEP coating removal process by a continuous wave (CW) Nd:YAG laser, and on the determination of the efficiency of this type of technology used for this purpose. Stripping surface per unit of time and energy consumption per unit area has been determined among other efficiency indicators. Regarding the characterization of the coating object of study, its thickness, surface roughness, contact angle, microhardness and absorbance-reflectance responses have been determined, and the results have been compared with those obtained in the case of PTFE. In addition, to evaluate the mechanical damage caused in the substrate after coating removal by (CW) Nd:YAG laser, the tensile strength, Vickers hardness, Ra and Rz roughness, and the substrate thickness have been measured and analyzed.

ACS Style

Óscar Rodríguez-Alabanda; Pablo E. Romero; Carlos Soriano; Lorenzo Sevilla; Guillermo Guerrero-Vaca. Study on the Main Influencing Factors in the Removal Process of Non-Stick Fluoropolymer Coatings Using Nd:YAG Laser. Polymers 2019, 11, 123 .

AMA Style

Óscar Rodríguez-Alabanda, Pablo E. Romero, Carlos Soriano, Lorenzo Sevilla, Guillermo Guerrero-Vaca. Study on the Main Influencing Factors in the Removal Process of Non-Stick Fluoropolymer Coatings Using Nd:YAG Laser. Polymers. 2019; 11 (1):123.

Chicago/Turabian Style

Óscar Rodríguez-Alabanda; Pablo E. Romero; Carlos Soriano; Lorenzo Sevilla; Guillermo Guerrero-Vaca. 2019. "Study on the Main Influencing Factors in the Removal Process of Non-Stick Fluoropolymer Coatings Using Nd:YAG Laser." Polymers 11, no. 1: 123.

Journal article
Published: 01 January 2019 in Procedia Manufacturing
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This work focuses on obtaining superhydrophobic surfaces on an aluminium-magnesium substrate for industrial use in a simple and relatively inexpensive way. For this purpose, texturing techniques have been used by sanding with paper, sandblasting with abrasives and hydrophobization by cathodic electrodeposition and immersion in cerium saline solutions. For the determination of superhydrofobicity, the sliding angle, advance and receding angle, number of bounces and determination of surface morphology have been measured. Both cathodic electrodeposition and immersion techniques have been used to obtain superhydrofobicity on the surface. Sliding angles up to 0 ° have been obtained and advancing angles higher than 150 °.

ACS Style

G. Guerrero-Vacas; P. Castilla-Montilla; P.E. Romero-Carrillo; J. Montes Ruiz-Cabello; O. Rodríguez-Alabanda. Superhydrophobic aluminum-magnesium surfaces obtained with cerium coatings. Procedia Manufacturing 2019, 41, 18 -25.

AMA Style

G. Guerrero-Vacas, P. Castilla-Montilla, P.E. Romero-Carrillo, J. Montes Ruiz-Cabello, O. Rodríguez-Alabanda. Superhydrophobic aluminum-magnesium surfaces obtained with cerium coatings. Procedia Manufacturing. 2019; 41 ():18-25.

Chicago/Turabian Style

G. Guerrero-Vacas; P. Castilla-Montilla; P.E. Romero-Carrillo; J. Montes Ruiz-Cabello; O. Rodríguez-Alabanda. 2019. "Superhydrophobic aluminum-magnesium surfaces obtained with cerium coatings." Procedia Manufacturing 41, no. : 18-25.

Original article
Published: 15 December 2018 in The International Journal of Advanced Manufacturing Technology
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In this study, dummy technique is used to form pre-coated metal sheet via single point incremental forming (SPIF). The materials used in the experiments are widely used in the manufacture of non-stick molds and trays: Aluminized steel sheets are employed as substrate, and a polytetrafluoroethylene (PTFE) resin is utilized as coating. The influence of vertical depth, wall angle, and step size in the variation of coating thickness and surface roughness has been evaluated using a design of experiments. The results show that higher values of wall angle are associated to higher reductions in the coating thickness. On the other hand, an improvement in the surface roughness is appreciated in all cases, favored by the use of dummy method. Higher reductions in surface roughness are obtained when higher values of step size are programmed.

ACS Style

Oscar Rodríguez Alabanda; Rafael Molleja-Molleja; Guillermo Guerrero-Vaca; Pablo E. Romero. Incremental forming of non-stick pre-coated sheets. The International Journal of Advanced Manufacturing Technology 2018, 101, 3065 -3071.

AMA Style

Oscar Rodríguez Alabanda, Rafael Molleja-Molleja, Guillermo Guerrero-Vaca, Pablo E. Romero. Incremental forming of non-stick pre-coated sheets. The International Journal of Advanced Manufacturing Technology. 2018; 101 (9-12):3065-3071.

Chicago/Turabian Style

Oscar Rodríguez Alabanda; Rafael Molleja-Molleja; Guillermo Guerrero-Vaca; Pablo E. Romero. 2018. "Incremental forming of non-stick pre-coated sheets." The International Journal of Advanced Manufacturing Technology 101, no. 9-12: 3065-3071.

Journal article
Published: 17 November 2018 in Materials
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Many trays and pieces of Al-Mg and aluminized steel are used in the food industry. Sometimes these elements have non-stick coatings to solve problems related to the adhesion of masses and food products. With use, the coatings deteriorate and lose efficiency and must be removed to apply a new coating. The thermal cycles suffered by these alloys during the removal process of the deteriorated coating (500 °C) and the polymerization of a new coating (400 °C) can affect the durability and efficiency of the metallic substrates. The evolution of the mechanical and microstructural properties of the Al-Mg and aluminized steel substrates after two thermal cycles was studied in this work. The following parameters were analyzed: tensile strength, elongation (%), hardness, ASTM grain size, and the nature and distribution of the constituent particles. The report concluded that the removal of the coating, after each cycle, produced a decrease in the mechanical properties of the substrates. The hardness and tensile strength in Al-Mg decreases between 20–27% and in aluminized steel between 10–11%. In both cases, the process does not compromise the reuse of the substrate for the application of a new coating layer. The final blasting stage does not affect the Al-Mg alloys but may affect the aluminized steel Al-Si protective layer if special precautions are not taken.

ACS Style

Óscar Rodríguez-Alabanda; Pablo E. Romero; Guillermo Guerrero-Vaca. Evaluation of Substrates of Al-Mg and Aluminized Steel Coated With Non-Stick Fluoropolymers after the Removal of the Coating. Materials 2018, 11, 2309 .

AMA Style

Óscar Rodríguez-Alabanda, Pablo E. Romero, Guillermo Guerrero-Vaca. Evaluation of Substrates of Al-Mg and Aluminized Steel Coated With Non-Stick Fluoropolymers after the Removal of the Coating. Materials. 2018; 11 (11):2309.

Chicago/Turabian Style

Óscar Rodríguez-Alabanda; Pablo E. Romero; Guillermo Guerrero-Vaca. 2018. "Evaluation of Substrates of Al-Mg and Aluminized Steel Coated With Non-Stick Fluoropolymers after the Removal of the Coating." Materials 11, no. 11: 2309.

Journal article
Published: 31 August 2018 in Metals
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The machining of cavities for blow molding is a long and costly process, with the objective of obtaining an excellent surface finish with the minimal possible electrical energy consumption (EEC). This work has studied which combination of cutting parameters and cutting strategies to use to achieve an optimum surface finish on the mold using the minimal associated EEC: in roughing operation, tool path strategy and axial depth of cut were studied; in finishing operation, tool path strategy, spindle-speed, feed-rate, and step-over were evaluated. Thirty-two molds were machined in blocks of aluminium alloy EN-AW 7075 T6 in a machining center of a three-axis, following an orthogonal design of experiments. The analysis of results demonstrates that: a roughing strategy has influence on the surface roughness on the bottom of the mold; a finishing strategy is an influential factor on the surface roughness on the walls of the mold; certain parameters have no relevance on the surface roughness but have an influence on the EEC; an adequate selection of cutting strategies and cutting parameters permit an improvement of surface roughness of up to 70%, and a reduction of 40% in EEC, compared to the less favorable tests.

ACS Style

Oscar Rodriguez-Alabanda; Maria Trinidad Bonilla; Guillermo Guerrero-Vaca; Pablo Eduardo Romero. Selection of Parameters and Strategies to Reduce Energy Consumption and Improve Surface Quality in EN-AW 7075 Molds Machining. Metals 2018, 8, 688 .

AMA Style

Oscar Rodriguez-Alabanda, Maria Trinidad Bonilla, Guillermo Guerrero-Vaca, Pablo Eduardo Romero. Selection of Parameters and Strategies to Reduce Energy Consumption and Improve Surface Quality in EN-AW 7075 Molds Machining. Metals. 2018; 8 (9):688.

Chicago/Turabian Style

Oscar Rodriguez-Alabanda; Maria Trinidad Bonilla; Guillermo Guerrero-Vaca; Pablo Eduardo Romero. 2018. "Selection of Parameters and Strategies to Reduce Energy Consumption and Improve Surface Quality in EN-AW 7075 Molds Machining." Metals 8, no. 9: 688.

Research article
Published: 30 August 2018 in Computer Applications in Engineering Education
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In this work, new analytical method‐based computer‐aided manufacturing (CAM) software tool developed for educational purposes is introduced. The software has been conceived for the designing, analysis, and optimization of the multi‐step wiredrawing industrial process. The software was used during four sessions and the student's feedback has been measured by a usability/suitability survey. This paper presents the complete study of the previous situation in the Area of Manufacturing Processes in the Superior Polytechnic School (University of Cordoba, Spain). The positive results from the students encouraged us for the integration of new practical activities supported in the use of this type of software tools, to reinforce the professional skills of students, and show that the new CAM software presents a great potential for competency‐based learning objectives.

ACS Style

Oscar Rodríguez-Alabanda; Guillermo Guerrero-Vaca; Pablo E. Romero; Lorenzo Sevilla. Educational software tool based on the analytical methodology for design and technological analysis of multi-step drawing processes. Computer Applications in Engineering Education 2018, 27, 38 -48.

AMA Style

Oscar Rodríguez-Alabanda, Guillermo Guerrero-Vaca, Pablo E. Romero, Lorenzo Sevilla. Educational software tool based on the analytical methodology for design and technological analysis of multi-step drawing processes. Computer Applications in Engineering Education. 2018; 27 (1):38-48.

Chicago/Turabian Style

Oscar Rodríguez-Alabanda; Guillermo Guerrero-Vaca; Pablo E. Romero; Lorenzo Sevilla. 2018. "Educational software tool based on the analytical methodology for design and technological analysis of multi-step drawing processes." Computer Applications in Engineering Education 27, no. 1: 38-48.

Journal article
Published: 27 August 2018 in Coatings
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The manufacturing of polyurethane foam is a process of great industrial importance in the automotive and furniture sector. The operation of demolding is the most delicate, since the foam sticks firmly to the walls of the mold onto which it has spread. In order to avoid the use of demolding agents, the proposal is to coat the inside of the molds with non-stick coatings. In this work, three types of different coatings were studied: fluoropolymers, ceramics, and elastomers. After carrying out different tests in the laboratory, two fluoropolymer coatings (PFA (perfluoroalkoxy) and PTFE (polytetrafluoroethylene)) were selected for a test at the industrial level and, after 1500 cycles of demolding, it was experimentally proven that the PFA coating is the most adequate for the use studied.

ACS Style

Francisco Sánchez-Urbano; Guillermo Paz-Gómez; Óscar Rodríguez-Alabanda; Pablo E. Romero; Miguel Cabrerizo-Vílchez; Miguel Ángel Rodríguez-Valverde; Guillermo Guerrero-Vaca. Non-Stick Coatings in Aluminium Molds for the Production of Polyurethane Foam. Coatings 2018, 8, 301 .

AMA Style

Francisco Sánchez-Urbano, Guillermo Paz-Gómez, Óscar Rodríguez-Alabanda, Pablo E. Romero, Miguel Cabrerizo-Vílchez, Miguel Ángel Rodríguez-Valverde, Guillermo Guerrero-Vaca. Non-Stick Coatings in Aluminium Molds for the Production of Polyurethane Foam. Coatings. 2018; 8 (9):301.

Chicago/Turabian Style

Francisco Sánchez-Urbano; Guillermo Paz-Gómez; Óscar Rodríguez-Alabanda; Pablo E. Romero; Miguel Cabrerizo-Vílchez; Miguel Ángel Rodríguez-Valverde; Guillermo Guerrero-Vaca. 2018. "Non-Stick Coatings in Aluminium Molds for the Production of Polyurethane Foam." Coatings 8, no. 9: 301.

Journal article
Published: 20 June 2018 in Applied Sciences
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The process of single point incremental formation (SPIF) awakens interest in the industry of mold manufacturing for the food industry. By means of SPIF, it is possible to generate short series of molds or mold prototypes at low cost. However, these industries require such molds to be functional (non-sticky) and to have an adequate geometry accuracy. This study presents a technique that enables direct manufacturing of molds from pre-coated sheets with non-stick resins. It has also studied the influence of two technological variables in the process (feed-rate and pitch) for different geometrical parameters of the mold. Low values of these variables result in a lower overall error in the profile obtained. However, in order to obtain greater detail in particular parameters (angles, depth), it is necessary to use higher values of feed-rate and pitch.

ACS Style

Oscar Rodriguez-Alabanda; Miguel A. Narvaez; Guillermo Guerrero-Vaca; Pablo E. Romero. Manufacturing of Non-Stick Molds from Pre-Painted Aluminum Sheets via Single Point Incremental Forming. Applied Sciences 2018, 8, 1002 .

AMA Style

Oscar Rodriguez-Alabanda, Miguel A. Narvaez, Guillermo Guerrero-Vaca, Pablo E. Romero. Manufacturing of Non-Stick Molds from Pre-Painted Aluminum Sheets via Single Point Incremental Forming. Applied Sciences. 2018; 8 (6):1002.

Chicago/Turabian Style

Oscar Rodriguez-Alabanda; Miguel A. Narvaez; Guillermo Guerrero-Vaca; Pablo E. Romero. 2018. "Manufacturing of Non-Stick Molds from Pre-Painted Aluminum Sheets via Single Point Incremental Forming." Applied Sciences 8, no. 6: 1002.

Journal article
Published: 01 August 2017 in Progress in Organic Coatings
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F. Javier Montes Ruiz-Cabello; J.C. Rodríguez-Criado; M. Cabrerizo-Vílchez; M.A. Rodríguez-Valverde; G. Guerrero-Vacas. Towards super-nonstick aluminized steel surfaces. Progress in Organic Coatings 2017, 109, 135 -143.

AMA Style

F. Javier Montes Ruiz-Cabello, J.C. Rodríguez-Criado, M. Cabrerizo-Vílchez, M.A. Rodríguez-Valverde, G. Guerrero-Vacas. Towards super-nonstick aluminized steel surfaces. Progress in Organic Coatings. 2017; 109 ():135-143.

Chicago/Turabian Style

F. Javier Montes Ruiz-Cabello; J.C. Rodríguez-Criado; M. Cabrerizo-Vílchez; M.A. Rodríguez-Valverde; G. Guerrero-Vacas. 2017. "Towards super-nonstick aluminized steel surfaces." Progress in Organic Coatings 109, no. : 135-143.

Journal article
Published: 28 June 2015 in Applied Surface Science
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This work compares laser and pyrolysis removal procedures of the fluorinated ethylene propylene FEP-rich coatings applied on EN AW-5251 H34 aluminium magnesium alloy sheets. The study has been conducted in three successive FEP coating application-removal cycles. Roughness, yield and tensile strength, elongation percentage, hardness, grain size and constituent particles distribution of the processed samples have been analyzed. According to the results, it is concluded that similar mechanical properties has been obtained for both removal technologies, being the laser decoating removal rates lower than those achieved by the pyrolytic procedure. However, the laser decoating process is consolidated as an industrial alternative against the dangerous and harmful (to the environment) pyrolytic extraction systems.

ACS Style

G.R. Guerrero; L. Sevilla; C. Soriano. Laser and pyrolysis removal of fluorinated ethylene propylene thin layers applied on EN AW-5251 aluminium substrates. Applied Surface Science 2015, 353, 686 -692.

AMA Style

G.R. Guerrero, L. Sevilla, C. Soriano. Laser and pyrolysis removal of fluorinated ethylene propylene thin layers applied on EN AW-5251 aluminium substrates. Applied Surface Science. 2015; 353 ():686-692.

Chicago/Turabian Style

G.R. Guerrero; L. Sevilla; C. Soriano. 2015. "Laser and pyrolysis removal of fluorinated ethylene propylene thin layers applied on EN AW-5251 aluminium substrates." Applied Surface Science 353, no. : 686-692.