Mejoramiento de la calidad en la recepción de materias primas, mediante la implementación de un plan de muestreo por variables

Objective: To guarantee the adequate inspection of raw material and packaging material by the inspection-receipt area by implementing an effective sampling plan that allows reducing the percentage of defective raw material and its impact on the production process. Methodology: It is based on the continuous improvement cycle (PHVA) within which a diagnosis is made to determine the current state of the inspection process, which will allow defining new action strategies aimed at standardizing the inspection process, through the implementation of a sampling plan by variables based on the MIL-STD 414 standard, once implemented, this process is documented, at the same time the integration of suppliers is carried out, through periodic evaluations in order to know the dynamics of the new inspection process and work only with those suppliers committed to the quality of their inputs. Contribution: Reduction of the percentage of defective raw material, from 21% to 13%, which means an acceptable quality level of the materials of 87%.

Metodología de superficie de respuesta dual con variables de ruido cualitativas

The application of the response surface methodology in the optimization of industrial processes has had a great boom in recent decades, however, with a significant limitation, the null inclusion of qualitative factors in the noise variables. Since the methodology assumes the behavior of the noise factors as a continuous behavioral variable that follows a normal distribution. But what happens if this is not the case? How to treat a qualitative noise factor? What probability distribution would best fit the qualitative noise factor? What would be the correct inclusion of this type of noise factor in the methodology? This article summarizes the four-year research work from the mathematical approach to the new equations, case simulations using mathematical software and 2 real cases in maquiladora plants that manufacture plastic parts.

Análisis aerodinámico en CFD de los alerones en automóviles convencionales

In the present study aerodynamic tests were performed by using Solidworks Flow Simulation software (CFD) in 2 different designs of conventional cars, implementing a spoiler in the back of the car to reduce the drag and lift coefficients that occur through the movement of the air regardless of the design in the back of the car and improve aerodynamics. Analyzing the results it is obtained that the aerodynamics of the car is improved when a spoiler is placed to reduce the drag and lift forces.

Análisis térmico e hidráulico de diferentes geometrías de tubos para mejorar el desempeño de un radiador de automóvil

Nowadays the automotive industry requires more powerful and compact engines, which demand that the cooling systems must be improved using new technologies to attend the aim to maintain the engine working at optimum temperature, the cooling system must be adjusted to the dimensions and weight set to avoid the increase of fuel expense. In the present work a numerical study to analyze the thermal and hydraulic performance of a car radiator is carried out. The research focuses on analyzing different geometries for the tubes that make up the radiator, inside of tubes a mixture of 80% water and 20% ethylene glycol is used as the cooling fluid. On the results the global Nusselt numbers for the different geometries, as well as the total pressure drop along the radiator tube are reported. A comparison of the thermal and hydraulic performance for the different geometries analyzed is made. From the results the best geometry to increase heat transfer is chosen, as well as the geometry with the best balance between entropy generation due to heat transfer and pressure drop is chosen.

Efecto del grupo funcional en la adsorción de Ag(I) en soluciones sintéticas con materiales mesoroprosos de silica

One of the main methodologies used in the industry for the recovery of gold and silver from cyanidation-rich solutions is the adsorption of activated carbon, a process that presents as the main disadvantage the formation of fines in the sorting screens that is where it is recovered, These fines represent a considerable loss of values in the process, which is why the search for alternatives that allow the recovery of gold and silver from the cyanidation rich solutions is of interest to hydrometallurgy, in this sense the magnetic preconcentration could be an alternative to this process; The present work shows the synthesis, characterization and study of the adsorption capacity of Ag (I) of mesoporous materials of silica modified with magnetite. These materials showed a good retention of magnetite in their structure based on the presence of amino groups in their structure, as well as silver adsorption capacities of 86.21-19.8 mgg-1.

Estudio de factibilidad para la aplicación de algoritmos de estimación de distribución al problema de secuenciación de vehículos

The main objective of an automobile production plant is to deliver on time and form the orders that are received daily. These orders are not homogeneous since they involve large quantities of cars that generally belong to different models and must be painted in different colors. The car sequencing problem that takes these characteristics into account was proposed by the Renault Company in 2005 as part of the ROADEF Challenge. This problem is NP-Hard and various techniques have been proposed to solve it, from exact methods to different heuristic algorithms. This work presents a feasibility study to apply two Distribution Estimation Algorithms (EDAs) to solve this problem. In addition, three important aspects are presented: the adaptation process of the algorithms, a technique for the execution of the algorithms called the "Stepped Approach with Discard" and a methodology that involves tolerance in the substitution of the individuals. The results obtained by the algorithms are also shown. The analysis of the results shows the algorithms adaptation process and the adjustments that can be made to improve their competence with the state of art.

Análisis del tostado del grano de café

Analyzing coffee grain roasting operations - Veracruz Region will contribute to the distribution of equipment and machinery in the Industrial Engineering workshop of the Educational Program. It aims to obtain improvements in the roasting process through the study of the work (January–June 2019), to lay the foundation for the proposals of Systems of Quality Management, Safety and Environmental Care in the following phases of the project (2019-2020) with effects on continuous improvement. In the coffee industry in Mexico has in the medium and long term, opportunities to grow and consolidate. As with most agricultural products from smallholders, such as coffee, the prices paid for the input ("cherry coffee") They are far from what the processed coffee comes to obtain in presentations of soluble and ground powder for coffee makers, and the process of improvement, quality, efficiency in roasting activities is necessary. The method analyzed the case studies of the operations of companies, producers and research related to the coffee and coffee industry and the interpretation of the statistical results.

Gestión del mantenimiento mediante Six Sigma para la optimización de la productividad de la maquinaria y equipos diversos para una pyme

The application of Six Sigma to Maintenance Management, to optimize the productivity of machinery and equipment for an SME, using the Six Sigma methodology, which is made up of its 5 DMAIC phases. This research develops and applies a combined strategy of TPM and Six Sigma in an SME to eradicate a major CTQ problem. In this sense, the approach used, the tools and techniques used are highlighted, evidencing the savings that were achieved through the structured application of a combined TPM / DMAIC procedure. Through the correct application of the TPM and Six Sigma methods, the present research identifies optimal parameter adjustments and maintenance activities, which allowed the company to eradicate CTQ problems and achieve significant improvements in product quality, the cost and delivery of a modest financial outlay. The application of the strategy and the resulting conclusions regarding its effectiveness for the industry is the real value of this work, for which, it will be valuable for quality professionals, and specialists in manufacturing in a wide range of industries.

Análisis de los factores de productividad, desperdicio y confiabilidad de los equipos, al implementar TPM en una empresa del sector automotriz

Total productive maintenance (TPM), is one of the practices most used by automotive companies, to increase their productivity, which is why this research is carried out in an automotive company validating this assumption, with the implementation of the TPM in a productive line and determining by means of an experiment design, if the TPM does not significantly affect the indicators of efficiency, waste, reliability of the equipment, because these indicators are important for the productivity of the company. With this analysis it was possible to demonstrate, for this particular case, that the MPR tool does help improve two of the indicators, although this conclusion only applies to this company and the line in which said analysis was applied, under the conditions in which was evaluated the tool, so that this conclusion is more general, it has to be evaluated in other companies and to be able to make the comparison of the behavior in each of them.

Organización del almacén de garantías de una empresa distribuidora automotriz de Ciudad Obregón

This project was carried out in the warehouse of guarantees of an automotive distribution company in Obregon City, which presented the disorganization of parts, unnecessary files, clogged floors and lack of cleanliness, causing the time to search for parts and files to be extended. Therefore, the objective of improving the conditions of organization and cleanliness of the warehouse was established through the 5'S philosophy. The procedure consisted of: describing the area under study; evaluate the initial situation of the warehouse; train the staff; elaboration of inventory of warehouse objects; separation of necessary and unnecessary objects; subsequently a place was assigned to each object, then the area and objects of the store were cleaned; standards were developed for the activities carried out in the warehouse; the level of compliance with the 5'S philosophy was measured and finally the final warehouse situation was evaluated. Initially, the situation of the warehouse as criteria of 5'S had a 16.47% compliance and once implemented the philosophy 5'S, the rating was increased to 92.94%, therefore, the objective of this project was achieved that was to improve the conditions of organization and cleaning of the warehouse.