Papers by Keyword: Manufacturing Process

Abstract: This paper identifies and investigates the influence of technological defects of manufacturing process on the dynamic behavior of thin chromium microbeam. The analytical models will be analyzed and corrected using finite element method (FEM) to determine their validity under influence of technological defects. A semi-analytical model will be proposed for the extraction of corrective factors from 3D FEM simulation of dynamic behavior of microbeam. Final results indicate that the correction of technological defects is very significant for Cr microbeam 80x2x0.95μm³. In other hand, the corrected value of Young’s modulus is very close to the experimental results and it is about 279.1GPa.

Abstract: The transfer robot using for small flat panel display manufacturing process is developed. Requirement for transfer robot such as minimization of deflection and lateral vibration is achieved by enhancement of stiffness of arm and hand by finite element analysis. Arrangement of reduction gear is designed to increase stiffness and decrease position error at the end point of arm. The repeatability of arm is improved by applying the precision control method. Experiment is conducted to verify the performance of developed transfer robot. From the performance test, developed transfer robot has repeatability of under ±0.1mm, deflection of 2mm, straightness of under ±1.5mm, and velocity of 1500mm/sec.

Abstract: Starting from the material to classify chairs and their manufacturing process, and focus on analysis of the production process of wooden chairs, main processes points and equipment.

Abstract: Machinery production main aim is to produce the asked products according to parameters and properties defined by costumers. For production of these components is needed the specific machinery consisted the machines, tools and fixtures. Mutual influence of these articles makes possible the production of asked components. That is a reason, why is necessary to specify particular machines that participate in production of these components. The determination of current machines number is very difficult and time consuming. For design is needed to weigh all factors joined to manufacturing process. It means inside and outside company factors influenced to manufacturing process. Lots of these factors influence extensively, concrete the speed, quality and elaborateness of particular products. According to that is necessary to use the accurate methods and the computations for machines determination in machinery.

Abstract: The presented paper deals with the influence of manufacturing process on the stress state of mechanical parts. The problem is presented in the assembly of the belt drum. The connections of individual parts are realized by press fitting and welding technology. The practical use of the belt drum shows the initiation of cracks in the weld body. The presence of press fitting connection in the structure is marked as the origin of high stresses in the weld body. The paper proposes the new assembly method in order to reduce the stress level in the weld structure and points the assembly method as one of important factors influencing the stress state of mechanical parts.

Abstract: Aerodynamicists have long acknowledged the blended wing body (BWB) aircraft design could produce great aerodynamic advantages due to the integration of the delta wing structure with the thick center body. Therefore the wind tunnel test campaign is crucial to gain information of the flow field that governs the delta-shaped wing which has frequently baffled the aerodynamicists. In such, the wind tunnel test required acceptable quality of delta-shaped wing model for results validity. Consequently, the manufacturing process as well as the selection of the appropriate machinery tools, must be wisely designed and performed. The modular 3D concept in associating with CAD/CAM technology was utilised in the process. Finally, the actual flow cycle of manufactures blended BWB aircraft model was sucessfully established. The objective of this paper is to highlight those complexity manufacturing process and techniques involved in order to produce a good blended delta-shaped wind tunnel model.

Abstract: Quality analysis in manufacturing must use quality measurement data as the premise, degree of accuracy of quality characteristic measurement results depends on measuring system capacity and performance. The purpose of this paper is to study five analysis of variance of the measurement system which apply in the production site. With MM-60 microscope measurement system as an example, through data collection, evaluate its measurement capability, give the report that the measurement system meets the measurement requirements in production, in order to inprove quality control of product on production manufacturing.

Abstract: This contribution focuses on solving a customer complaint accepted by an organization for manufacturing of automobile seats. The occurrence of nonconformity and causes of undetected nonconformity in the manufacturing process of automobile seats is solved by seven new quality management tools. Causes, effects, activities leading to elimination of the problem, remedies and precautions for possible problems within solution implementation, and time schedule with individual reserves are defined. Results lead to solving the issue both on the part of supplier and on the part of the organization for manufacturing of automobile seats

Abstract: Stainless steels of different types and grades are being developed world over to meet ever increasing demand for enhanced materials performance. Advanced stainless steel products have applications in a variety of industries including nuclear, defence, space, chemical, oil and gas, medical and appliance. It is understood that the properties of the alloys strongly depend not only on the chemical composition but also on their microstructure, which in turn depends on parameters in the manufacturing process. Therefore, the challenge to the manufacturing industry is not only selection of optimum composition but also relevant manufacturing processes to meet the requirements. Designing a manufacturing process and optimum process schedules using experimental trials is both time consuming and expensive. Modeling and simulation play an important role to reduce these times effectively. This paper presents important points to be considered to produce clean steels and highlights the applicability of modeling techniques that can be effectively applied in a manufacturing industry. Some of the case studies that are included in the paper are Computational Fluid Dynamics model to understand gas atomisation Finite element modeling of compound tube extrusion In conclusion, the power of modeling and simulation to understand manufacturing processes is highlighted.

Abstract: Assembly line design is an important part of the production system in manufacturing processes. An assembly line, which consists of a sequence of workstations, is an efficient method of manufacturing high-volume products such as automobile parts and microcomputers. In designing an assembly line, it is common practice to "balance" the line so that a more uniform flow is maintained. The Assembly Line Balancing (ALB) scheduler evaluates the effect of the different online sequence of parts on production cycle, balances workload and utilization ratio, minimizes span of the assembly line. The simulation model approach in this study to obtain the scenarios which are reducing the unbalancing time. The simulator presented herein, named Assembly Line Simulator (ALS), can be used as supporting tool in finding solutions of the assembly line balancing problem. Throughout the scenarios of the optimum method will be chosen which scenario is represented minimum idle time it will be the optimum balance of the assembly line.