Design Manufacturing Technology Research Articles

Design of Life Cycle Technologies of Associated Products and Waste in the Process of Preparing the Production of a New Automotive Component

The approach to minimizing the impact of automotive production on the environment, reducing resource consumption and losses due to adequate planning of waste generation in the workplace and the development of processes of their life cycle at the stage of preparation of production of automotive components. The algorithm of design of manufacturing technology of automotive components with the development of processes of generation in the workplace of all types of by-products, aimed at preventing potential losses in mass production. Blocks of calculation procedures of the design algorithm of manufacturing technologies of automotive components are implemented in accordance with the stages of preparation of a new product in the nuclear industry. Calculation of volumes of associated products is integrated as an integral part in the design and calculations of the process of creating a commodity product, for which the structural part of the process is allocated, modeling of the content of intraoperative processes of creating basic and associated products is performed, time chains are formed. The system calculates the volume of commodity and associated products. Schedules for the timely removal of by-products, waste and emissions from workplaces are being developed, with the planning of types of additional work for the maintenance of workplaces. Economic calculations are performed for decision-making by engineering services of the enterprise.

Применение ориентированных гиперграфов ограничений при проектировании технологии изготовления высокоточных конструкций

Применение ориентированных гиперграфов ограничений при проектировании технологии изготовления высокоточных конструкций

Quality Planning of Parts Machine Production Based on Housing of Cylinder Head Milling Machines

Taking care of entrepreneurs for full compliance of the products with the requirements and expectations of the customer and the relevant regulations and standards begins in the product design phase. The next important step is to design manufacturing technology. The result of this process, together with the criteria relating to the assessment and acceptance of the results of each operation is a quality plan. The subsequent results of the products realization depend on the awareness of entrepreneurs and their serious approach to quality planning. This article is an example of a tabular quality plan for the production of housing of cylinder head milling machines for the metal. It is the result of a project realized for the machines production company. It has developed the table form, which was completed in cooperation with a technology team and based on existing technology cards. The article includes a fragment of a quality plan covering various manufacturing operations of the machine production. The example of a quality plan to produce the parts machine confirms that it is possible to clearly identify the different stages of production with a guarantee which the company declares its customers. It can be proved that the production takes place in supervised conditions. There were also specified the necessary human and technical resources, documentation and records and most of all space and criteria of measurement and sizes relating to the acceptance or rejection of results of production stages.

Virtual Prototype Construct of Agricultural Tricycle Based on Driver-Tricycle-Road

On the basis of the tricycle rigid virtual prototyping model ,flexible body virtual prototyping model with dynamic characteristics was constructed via the addition of tricycle parts mass, inertial characteristics, elasticity of elastic damping components and conditions about damping, road and tyres. With the driver control model joined the virtual prototype of the tricycle and real-time feedback and regulation operated on tricycle snaking phenomenon, then driving conditions of the actual tricycle on the road was accurately simulated. As the simulation results suggested, the tricycle rigid virtual prototyping model could be applied to acceleration performance, braking performance, vehicle riding comfort and other simulation analysis, therefore, ideas were provided in further development of design manufacturing technology.

A procedure for the determination of the angles [formula omitted] and [formula omitted] which appear in the nonlinear system of differential equations describing the dynamics of the outer and inner radii of a tube grown by the edge-defined film-fed growth (EFG) technique

In this paper, a procedure for the determination of the angles α ̃ e ( r e , h ; p e ) ( α ̃ i ( r i , h ; p i ) ) between the tangent line to the outer free surface (inner free surface) of the meniscus at the three-phase point, of coordinates ( r e , h ) ( ( r i , h ) ) and the horizontal axis ‘Or’ is presented. These functions appear in the system of differential equations which describe the evolution of the outer radius r e (inner radius r i ) of a tube grown from the melt by the edge-defined film-fed growth (EFG) technique. These angles can fluctuate during the growth. The deviation of the tangent to the crystal outer (inner) free surface at the triple point from the vertical is the difference α ̃ e ( r e , h ; p e ) − ( π 2 − α g ) , ( α ̃ i ( r i , h ; p i ) − ( π 2 − α g ) ) , where α g is the growth angle. The deviation can also fluctuate, and the outer (inner) radius r e ( r i ) is constant when the deviation is constant equal to zero. The knowledge of α ̃ e ( r e , h ; p e ) , α ̃ i ( r i , h ; p i ) is necessary for the analysis of the nonlinear system of differential equations describing the dynamics of the tube growth and for the determination of the interface height h and of the outer and the inner radii r e , r i , respectively, of the tube to be grown with a given pulling rate v in specified thermal and pressure conditions p e , p i . These kinds of result are useful in experiment planning and manufacturing technology design. Numerical results are given for a silicon tube.

The effect of the pressure difference across the free surface on the static meniscus shape in the case of ribbon growth by edge-defined film-fed growth (E.F.G.) method

In this paper explicit formulas, prescribing pressure difference limits, are reported in the case of ribbon growth by edge-defined film-fed growth method. These formulas were established in general for any growth configuration and for materials for which α c + α g < π/2. The limits represent the boundaries of the ranges where the pressure difference value has to be chosen or can be chosen, in order to have a static and stable convex free surface. The advantage of this kind of formulas is that they can be used in the experiment or in the manufacturing technology design.

Pressure difference across the free surface of a stable static meniscus in a possible Ge1−XSiX ribbon growth by edge-defined film-fed growth (E.F.G.) technique

Abstract In this paper, it is shown in which kind the pressure difference across the free surface has to be chosen to obtain a stable convex static meniscus with a prescribed size in the case of a Ge 1− X Si X single crystal ribbon growth by E.F.G. technique. The dependence of the pressure difference on the composition X is analyzed. The same tools as for a Ge or Si single crystal ribbon growth are used. The results can be useful in a future experiment planning or manufacturing technology design.

Editorial to 1st International &amp; 22nd AIMTDR

This special issue of IJAMT consists of some select papers of the 1st International and 22nd All India Manufacturing Technology Design and Research (AIMTDR) conference held at Indian Institute of Technology (I.I.T.) Roorkee (India) during Dec.21–23, 2007. Let me give a very brief history of these AIMTDR conferences. The first AIMTDR conference was held at Jadavpur University, Calcutta in the year 1967. Initially, this conference used to be held every year till 1970 but later on the National Advisory committee (NAC) of AIMTDR decided to hold it every alternate year. The first biennial conference was held at University of Roorkee (now, I.I.T. Roorkee) in 1971. Initially, the acronym AIMTDR stood for “All India Machine Tool Design and Research” which was some time in the late 1980s changed to “All India Manufacturing Technology Design and Research” retaining the same AIMTDR acronym. With increasing participation from abroad and to further encourage this trend, a new dimension to the AIMTDR Conference has been added in its latest venture and it has been designated as the 1st International & 22nd AIMTDR Conference. This new name made it possible to include research activities in this conference related to various manufacturing technologies such as casting, forging, machining, inspection, metrology, etc. Not only this, the conference organizers started encouraging research activities related to the newly evolving areas in manufacturing systems and technologies, namely, Computer Integrated Manufacturing Systems, Flexible Manufacturing Systems, Cellular Manufacturing, Just-In-Time, Concurrent Engineering, and so on. In the past one decade or so, many new areas have rapidly emerged especially under the umbrella of nano-technology including μand nano-fabrication, μto nano-finishing, micromachining, μ-forming, μ-forging, and similar other technologies. Computational Manufacturing Engineering (CME) too has been an area of research interest of many researchers since long time. AIMTDR conference also includes research papers related to modeling and simulation of manufacturing processes. Some of the very new areas that are being covered by the AIMTDR conference include Web Manufacturing, Supply Chain Management, Green Manufacturing, Intelligent Manufacturing Systems, and similar others. Manufacturing has been benefited significantly from the recent developments in the areas such as IT, microelectronics, new materials, advanced sensors, and actuators. Computer support in manufacturing covering design, process control, and data transfer has enabled manufacturing to scale new heights leading to globalization and resource optimization. An increased awareness of the environment and the need to conserve energy has led to new developments in this field. International competition with customer focus has brought out the importance of excellence in quality, agility, and cost factors in manufacturing. Environmentally sustainable manufacturing technologies, increased customer expectations, and rapid response to customers need call for constant technological innovations in manufacturing. AIMTDR conferences have been covering many such areas for discussion and publication of research papers thus making it a dynamic conference changing with time to capture the needs of the user industries. This feature of the conference was well reflected in the contributed papers submitted for presentation in the 1st International and 22nd AIMTDR Conference held at Int J Adv Manuf Technol (2008) 38:489–490 DOI 10.1007/s00170-008-1590-6

Simulating the design of special cutting tools

Currently, in simulating the design of special cutting tools, different models (graphs, analytical dependences, functional models) and methods (three-dimensional representation of objects, search methods, etc.) are used. The goal of simulation is to improve the cutting tool at the design stage and to obtain tool characteristics guaranteeing the manufacture of parts of specified quality in different combinations of cutting conditions, machine tools, software, and hardware. A unified design and production system is organized within the framework of a general quality-control system, covering the whole tool lifetime, from obtaining the order for its design to its withdrawal from service. Currently, there are no integrated methods of cuttingtool design within a unified CAD/CAE/CAM/PLM environment based on common algorithms and rules. The method proposed for organizing this environment is based on functional simulation of the design of special cutting tools. The design stage takes the form of processes divided into functions reflecting the current state of these processes and functions permitting their redesign. Automation of the design of manufacturing technologies for cutting tools may be analyzed on the basis of the general principles of computer-assisted systems used in the design of manufacturing processes for general-purpose machine parts [1, 2]. In this approach, in particular, the cutting tool is not considered as an object of design and production, with properties differing from those of machine parts. The cutting tool may be regarded from two points of view, as shown in [3]: as a certain object for which manufacturing processes must be designed; and as a component with a specified function, for producing parts of specified dimensions. In the latter case, a machining method employing a cutting tool selected by the technologist is determined; the tool may be of different designs. Obviously, these perspectives are fundamentally different: in the first, the cutting tool is considered without taking account of the technological-design goals; in the second, it is regarded as a component of this process, permitting different production sequences. Depending on the selected approach, the design of the computer-assisted design system will take different forms. Aspects of the cutting tool that must be taken into account in its design and manufacture were identified in [3]: the many technologically equivalent design options; and the possibility of formulating approximation problems. This calls for the creation of an integrated CAD system for the cutting tool, covering both its design and the formulation of an appropriate manufacturing technology. On the basis of the components of the CAD system, a functional model of cutting-tool design may be created (Fig. 1). In stage 1 (deriving the design constants), the parameters of the tool (tooth geometry, length of the cutting and calibrating sections, tooth spacing, etc,) that guarantee specified quality of the manufactured part are determined, taking account of the initial data for the machined parts (the type of material, the required surface roughness, the optimal cutting conditions, etc.) and the available resources. In stage 2 (determining the variable structural components), technological pathways (TP) of cutting-tool manufacture, operating technologies (OT), and control programs (CP) for the machining of cutting tools on numerically controlled machine tools are developed, taking account of the design standards (I) and also the constraints on the implementation of the new techno

Manufacturing Technology Design System Synchronized Mold Design with Product Design Based on Logic Analysis of Manufacturing Technology

The objective of this research was to establish and realize a streamlined process from product design to manufacturing. Studies showed that this may be effectively accomplished by synchronizing the product and tooling design processes and incorporating manufacturing specifications during this product design phase. The proposed method entails a detailed tabulation of skills and judgments made by experienced manufacturing engineers onto a check list. These elements are quantified and simplified so that a non-skilled worker may perform the tasks. The parameters were then used to construct 3D CAD models forming collection of 3D data that is referred to as the “check module”. Implementing manufacturing specification check sheets and the check modules for a cell phone design resulted in 33% reduction in man-hour compared to existing approach, while the number of tasks requiring judgments and decisions was reduced by 78%. These measures decreased product defects stemming from human error and allowed a streamlined product and mold design.

Iterative triangulation: a theory development process using existing case studies

AbstractTo cope with the growing frequency and magnitude of changes in technology and managerial methods, Operations Management (OM) researchers have been calling for greater employment of field‐based research methods. A notable example is grounded theory development using original case studies. Based on in‐depth examinations of ‘real‐world’ operations conditions, case studies potentially improve the relevance and workability of resulting OM theory. However, developing original case studies requires considerable time and expense, straining research resources and often limiting the number of operations settings that can be studied and compared during induction. Existing case studies offer a potentially effective and efficient means for comparing complex and disparate operations settings. This paper proposes a novel theory development process, termediterative triangulation, for tapping this potential. Iterative triangulation employs systematic iterations between literature review, case evidence, and intuition. The process enhances theory creativity, utility, and validity by deliberately increasing the diversity and quantity of literature reviewed, of cases found, of conjectures examined, and of conjecture selection criteria. Comparing and contrasting emerging constructs and theory across case settings refines conceptual definitions and strengthens internal validity, enhancing testability of resulting theory. A study of advanced manufacturing technology design illustrates the method.

Advanced Manufacturing Technology Development: A Macroergonomics Perspective

This paper examines and discusses the implications of a macroergonomic perspective for assimilating advanced manufacturing technological innovations into an organization's human infrastructure. A framework for integrating sociotechnical systems and advanced manufacturing technology design is presented which identifies first-and second-order effects of the new technology on the human infrastructure. The Human Infrastructure Impact Statement (HISS) operationalizes these concepts into a systematic assessment tool. This paper ends with a brief list of some of the pertinent macroergonomic decisions that a manager and a macroergonomist must consider in implementing and designing Advance Manufacturing Technologies.

Study of electron traps in the thin interfacial oxide layer of Al-, Au- and [formula omitted] GaAs Schottky barriers by detrapping experiments : R. L. Van Meirhaeghe, W. H. Laflere and F. Cardon. Solid-St. Electron.25 (11), 1089 (1982)

In this paper, a procedure for the determination of the angles α̃e(re,h;pe)(α̃i(ri,h;pi)) between the tangent line to the outer free surface (inner free surface) of the meniscus at the three-phase point, of coordinates (re,h)((ri,h)) and the horizontal axis ‘Or’ is presented. These functions appear in the system of differential equations which describe the evolution of the outer radius re (inner radius ri) of a tube grown from the melt by the edge-defined film-fed growth (EFG) technique. These angles can fluctuate during the growth. The deviation of the tangent to the crystal outer (inner) free surface at the triple point from the vertical is the difference α̃e(re,h;pe)−(π2−αg), (α̃i(ri,h;pi)−(π2−αg)), where αg is the growth angle. The deviation can also fluctuate, and the outer (inner) radius re(ri) is constant when the deviation is constant equal to zero.The knowledge of α̃e(re,h;pe), α̃i(ri,h;pi) is necessary for the analysis of the nonlinear system of differential equations describing the dynamics of the tube growth and for the determination of the interface height h and of the outer and the inner radii re, ri, respectively, of the tube to be grown with a given pulling rate v in specified thermal and pressure conditions pe, pi. These kinds of result are useful in experiment planning and manufacturing technology design. Numerical results are given for a silicon tube.

Automation in Designing Manufacturing Technology Providing an Increase in Product Quality

Theses Methods of automation in designing manufacturing technology providing during the manufacture the desired quality of products are considered. The results of theoretical and experimental study on the influence of machining methods and conditions on the surface quality of machine elements and their operating characteristics are taken as a basis for modeling manufacturing technology. General aspects of parametric and structural optimization of technological process in mechanical engineering are stated. The possibility is shown to model the route of technological process for the manufacture of machine parts taking into account the phenomenon of technological heredity. General algorithms are presented for solving the problems considered.