Papers by Keyword: Process Design

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Authors: Huesup Song, Joo Sun Kim, Hai Won Lee
Authors: Jin Jun Tang, Li Qun Hou, Liang Jun Fei, Yu Lei Li, Xiao Yu Jin
Abstract: This paper is mainly on the research of squeeze casting production automobile air conditioner front cover FS170C, due to the development and optimization of the part in the production process, design and manufacture of low cost mould, the rules of structure and properties of castings is lack of corresponding research, seriously affected the development and market competition ability of the air conditioning compressor front cover. In order to solve the above problems, and to provide reference data and process scheme is necessary, this study to optimize the design of squeeze casting technology of the front cover of the air conditioner, finalized a most reasonable extrusion casting scheme, namely the gating system is more suitable and exhaust system design, and the squeeze casting process parameters, in this scheme next, carries on the mold design, production of squeeze casting of high quality.
Authors: Y. Abe, T. Kato, Kenichiro Mori
Abstract: To simplify the recycling of automobiles, aluminium alloy sheets were joined by means of a self-piercing rivet. Although steel rivets used in conventional self-pierce riveting are removed from the aluminium alloy sheets in recycling, the removal is not required for aluminium alloy rivets. The joined sheets with the rivets are directly melted due to the same material, aluminium. For the joining of aluminium alloy sheet by the aluminium rivets, the joinability was improved by the designed shape of the rivet and die. To pierce the upper sheet, the diameter and edge angle of the rivet are modified. The diameter of the depth and the cavity of the die were also designed from trial and error using finite element simulation. The effectiveness of the designed rivet and die were evaluated from an experiment on riveting. The aluminium alloy sheets were joined by the optimised aluminium alloy self-piercing rivet and their effectiveness measured.
Authors: Yong Hui Feng
Abstract: In the design process of products, modern design technology pays more attention to the application of space art. As the rising of software design technology, using the computer to design process and optimize is widely used in the development of product and packaging. In this paper, we use the UG design software to do two-time development on software based on UG-NX platform, and use UG/API to connect space design system MySQL, which realizes the space art computer processing technology of modern design. Finally, using the design of casting products as an example, we use UG software to develop mechanical process flow, and design 3D model of product, and use MySQL database to optimize the model. It provides the technical reference for the study of art space in modern design.
Authors: Yury Klochkov, Albina Gazizulina
Abstract: The article is devoted to the application of the method of performance evaluation of the production process design, using associative design. A number of approaches to estimation of efficiency of associative design, which are based on estimates of the design timing, the number of imposed changes at appropriate stages of the product life cycle.
Authors: Xin Wang, Dan Su, Hai Bo Li
Abstract: Take the project of campus sewage ecological treatment and reuse in Shenyang University for example, this paper expounds on the design of the combined process of intensified pretreatment with biological contact oxidation (BCO) process and ecological treatment with subsurface wastewater infiltration system (SWIS). The operation performance showed that the project worked stable and the pollutants were removed effectively. The effluent quality achieved the designed goals and met the national standards of GB/T 18918-2002 and GB 18921-2002 of China. The project has set up a kind of typical technological model for small-scale decentralized wastewater treatment and reuse.
Authors: Li Li Liu, Jin Sheng Sun, Lan Mei, Yan Hong Wang
Abstract: In this preparation, FCCU main fractionator and corresponding absorption-stabilization system are systemically simulated on the basis of industrial data. Through analysis, a heat exchanging column is added to improve the flowsheet before rich gas cooler to make good use of heat of the compressed rich gas. To decrease LPG lost along with dry gas, a dry gas compression-expansion refrigeration circle is proposed to offer refrigeration capacity in place of the cooling water for the absorber pumparounds. Compared with the regular scheme, energy consumption and C3+ components in dry gas is reduced respectively by 17.18% and 7.16% and LPG yield is increased by 0.41% simultaneously.
Authors: Jung Il Lee, Joo Ho Lee, Seung Hwan Park, Han Shin Choi, Hoon Cho, Hyung Ho Jo, Skae K. Kim, Hyuk Chon Kwon, Jung Eui Hong
Abstract: The proper control of total impurities and oxygen contents of oxygen-free high conductivity (OFHC) copper prepared by vacuum high-frequency melting technique was studied using Mahalanobis-Distance (MD) outlier detection method as functions of raw material purities, vacuum pressure, melting temperature and holding time. The properties of vacuum-melted OFHC copper was examined by thermo-gravimetric analysis, differential scanning calorimetry, hardness test, macro and optical microstructure analyses and ultimate tensile test. In multivariate systems, the existence of outlier makes it difficult to analyze the system and oultier detection belongs to the most important tasks in experimental data analysis. Mahalanobis Distance is most commonly used as a diagnosis of existance of outlier in multivariate system. The relationship between experiment conditions and total impurities and oxygen contents can be defined with the regression analysis results. At this research, our desirable manufacturing conditions is to obtain the total impurities under 40 ppm and oxygen contents under 5 ppm. After this statistical approach, the suggested minimum maufacturing conditions are the purity of raw material was 4N, vacuum pressure was 10-1 torr, melting temperature was 1150°C and melt holding time was 20 minutes.
Authors: Esmeray Üstünyagiz, Taylan Altan
Abstract: Progressive and transfer dies are used for forming of sheet metal parts in large quantities. For a given part, the design of progressive die sequence involves the selection of the number of forming stages as well as the determination of the punch and die dimensions at each stage. This design activity is largely experience-based and requires prototyping involving several trial and error operations. In some cases, empirical data and the experience based design procedure can be combined with Finite Element Method (FEM) based analysis to reduce time and cost. Often, when using FEM in progressive die design, friction and its effect upon temperatures is not adequately considered. However, at each forming station the plastic deformation and the tribological conditions influence the material flow as well as the temperatures and pressures at the tool/workpiece interface. The performance of the lubricant and coolant, used in progressive die forming, is affected significantly by interface pressure and temperatures. Therefore, a progressive process and die design methodology should include the consideration of metal flow as well as temperatures and pressures. Heat transfer coefficient, friction, plastic deformation, forming speed at each forming stage, time for part transfer from one stage to the next, and the ability of the used lubricant to cool the dies, have considerable effect upon a successful stamping. This paper describes a method for designing a progressive die sequence for forming axisymmetric sheet metal parts. The methodology for process sequence design combines experience based empirical data obtained through previous designs, design rules and numerical simulations including plastic deformation and friction. The initial experience-based design was refined using FEM and the thinning of the material in each successive drawing stage was calculated. The thermo-mechanical model was obtained using a constant friction coefficient along the tool/workpiece contact zone. Finally, the tool/workpiece interface temperature and the normal pressures were estimated in order that the lubricant can be selected based on these process conditions. The design predictions, made by using empirical data and FEM, were compared with experimental data.
Authors: Bing Chang Liu
Abstract: In the article we have carried on the design to promote frame and processing clamp. Formulate rules of mechanical processing technology fistly, mainly including:1. The production process and mechanical processing technology process.2. Formulate the original data to develop mechanical process. By analyzing the data, draw the processing technology of promote frame parts. Design the machining process, formulate the process route of machining. Finally, complete the design of fixture by Selection of locating datum, the cutting force and clamping force calculation, positioning error analysis.
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