Applied Mechanics and Materials Vols. 809-810

Abstract: Product development requires certain activities which are based on reasoning, logic, structure, etc. and which is using large quantities of knowledge. Transiting successive well-defined stages is transforming market requirements into products or merchantable services. New product development requires the creation and evaluation of product development strategy, the organization and product concept generation, designing, testing and validation of product design, its manufacture, marketing and ensuring the product warranty and post-warranty service. The interest of an ontological approach is now well documented in the literature, especially related to clarifying, formalizing and standardizing the conceptual entities within a domain of discourse. The work presented here aims at designing a generic ontological model of the product structuring models’ domain, suitable to be easily extended to cover the many sub-domains of PD, thus facilitating the design of such application ontologies in the future, and their implementation in CAx platforms and data management systems.

Abstract: The current paper describes the application of the Six Sigma methodology for reducing the number of scrapped parts on the manufacturing line at Start Transmission Comp. The paper shows how the five steps of the method, namely Definition, Measurement and Analysis, Improvement and Control, are applied, as well as the methods and quality tools used.

Abstract: Premature loss of temporary teeth, both the lateral and the frontal area can have unfavorable consequences on the development of permanent dentition, the support serving to maintain space for permanent teeth eruption in the dental arches. The aim of the study was assessment of different types of fixed and removable space maintainers in terms of their longevity in the dental arches that were applied as interceptive orthodontic treatment for edentulous space management transiently due to premature loss of deciduous teeth. The study followed the evolution of space maintainers properly applied to clinical cases that required these therapeutic options, and appreciated the success rate and the failure of these devices, important being the time at which the assessments were made. Findings failure rate of applied space maintainers was reported to the main causes that could lead to remove the devices: loss of space maintainers, especially those removable, fracturing both fixed and removable devices, loosening orthodontic rings and of course, taking into account the absence of some subjects at periodic reassessment meetings. The space maintainer was considered a success when it fulfill the main role for which it was applied - transitional management of edentulous space, and then being removed when the permanent succession tooth eruption occurred.

Abstract: The paper presents a frame for applying the core tools for managing the production of automotive parts, supplied to the Original Equipment Manufacturers (OEM). Those core tools and another quality management tools and procedures are required to be applied by the automotive customers, according with the OEM’s requirements. The requirements in discussion are condensed within the PPAP (Production Part Approval Process) documentation. The study presents a way for starting the design and implementation of such a procedure for a tier 1 automotive supplier, according with the appropriate various Customer Specific Requirements (CSR). The study is useful especially for those ones that supply simultaneous for several global automotive OEM (BMW, Chrysler, Fiat Group Automobili, Ford Motor, General Motors, PSA Peugeot Citroen, Renault).

Abstract: Quality management in projects includes the processes necessary for providing the fact that the project satisfies the necessities it had been accomplished for. The quality planning function must remain present throughout the project life cycle. The quality assurance in the projects can be defined as part of quality management in projects that provide confidence that the requirements relating to the quality of the activities carried out in the project will be met. We propose a model in the work for the implementation of the quality assurance process at every stage of a project, from project idea to project results. The proposed model, called PDP/PIP (project definition process/ project implementation process) is described as an application for a project machinery industry standard tools. The outcome of the project quality assurance is a quality improvement plan. This represents a document which is specified actions designed to raise the efficiency of quality management processes in projects and quality of results of the project.

Abstract: Although all aspects of a product design are demanding and need several resources to be completed, Design for X (DfX) represents a series of formal methodologies used to optimize a specific aspect of the product design under consideration. Those DfX tools deal with different stages of the product design and there is considerable gap concerning the package design cycle. The proposed methodology Design for Skin and Shape (DfS&S) is focused on the package design industry and offers significant advantage towards its success. It helps the designers to be focused on shapes that are easily recognized by the customers and then create appropriate graphics for them. Following this approach, it is easier to create an innovative optical identity for the product and its packaging during the conceptual stage. The methodology can reduce the development time of the package, while designers have in mind, from the beginning of the design process, the shape which will guide them to its completion. Following the proposed methodology different packaging designs are presented.

Abstract: The methodology of establishing an Electric Arc Furnace (EAF) and technological plant’s best management strategy is based on the “technological process – technological plant” interdependences. The paper presents the best management of a plant and consists of an assembly of operations, measures and decisions, established and applied in order to make the technological process more efficient from the technical – economical point of view. We present constructive and functional description of an Electric Arc Furnace such as: refractory masonry; metallic construction; electric installation. We also present the best management of a plant consisting of an assembly of operations, measures and decisions, established and applied in order to make the technological process more efficient from the technical–economical point of view, Electric Arc Furnace management included.

Abstract: This paper aims to analyze processes of an automotive industrial company in order to identify and implement management methods to modify the volume of produced product starting with the changing request through to the handover of the first produced and approved new product status to volume production. The specialist scope extends to each volume of produced product or part thereof, irrespective of whether this was produced in-house or externally sourced. The effects of a product modification on the production process, purchased parts and production resources are included in full. A modification can be implemented with or without a modification project. If a modification is implemented within the scope of a modification project, the regulations governing product development process projects apply. The application process of modifications comprises the modification request, define modification scope, analysis of consequences and approval of modification request. The decision and responsibility to implement the modification process in volume of produced products lies to the product line manager. Every modification type constitutes a product change and can be mapped in various ways in a system.

Abstract: The paper compares the assembly process of milling machine using two systems: cell system and production line which was introduced after the changes in the machine assembly system of the company. Assembly in both systems takes place in the SKD (semi-knocked-down) system, which consists of assembly finished, large parts of the machine (higher completeness units) imported into the country of installation. The illustrated example presents advantages and disadvantages of assembly of milling machines in two systems: cell assembly and on the assembly line. In this example, the employees in each cells conducted assembly of machines divided into stages, which was dependent on the supply of items in the designated field by warehouse workers. Warehouse department receives a signal at what stage the assembly process is and whether the delivery of certain items is necessary. The assembly system was reorganized and replaced by the assembly line. This assembly, as previously cell assembly, is carried out in SKD system, which is a partially exploded into components. Previously assembly method took place in three stages. After the change to the assembly line this process takes 14 steps.

Abstract: This work is devoted to the development of design methods for flexible rotor lines that will combine several large-scale productions of products of different sizes in the mass diversified flow of goods by processing several sizes of goods in each group tool module. Performed work provides an opportunity to increase productivity of flexible rotor lines in 3-4 times by increasing the number of goods in 2-8 times by processing several sizes of products in each group tool module. The developed design methods for flexible rotary machines and group tool modules allows you to create high-performance systems based on combining a group-volume production of products of several sizes in the mass diversified flow of goods. Organizational and technological bases of flexible rotary machines creation are first developed in this paper. Every tool module handles multiple sizes products in these new machines. New links have been established between the structural elements of flexible rotary line with the group tool module and a combination of flow characteristics. That allows us to determine the structure of the flow of goods by combining several large-scale productions of products of several sizes in the mass diversified flow of goods.