Papers by Keyword: Processing

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Authors: Yan Ma, Quan Hui Wu, Chun Mei Yang, Feng Ming Jing
Abstract: This paper described a miniature refiner plate and its manufacturing. The plate was used for preparation of timber microfibril. Grinding teeth used Archimedes spiral groove as a path, the path effectively increased grinding trajectory path; all grinding teeth and alveolus unit were in the same equal length, effectively increasing the flow and easy to manufacture. The semifinished plate was processed in an ordinary lathe, then the processed surface was quenching, ensuring hardness, wear resistance and fatigue strength.
Authors: Yun Ping Pan, Wen Juan Yang, Yi Min Mo
Abstract: Short pulse lasers, including picosecond laser and femtosecond laser are involved to investigate the ablation characteristics of processing carbon fiber reinforced plastics (CFRPs). The ablation threshold of the femtosecond laser, 0.453 J/cm2, is twice higher than that of the picosecond laser 0.867 J/cm2, since the former generates an intense and shorter pulse and the atoms excitation and multi-photon absorption may occur as short as 10 ps or less. The ablation test also describes the processing qualities, where the femtosecond laser has processing abilities without visible thermal defects or charring over the picosecond laser.
Authors: Helmut Clemens, Svea Mayer
Abstract: Challenging issues concerning energy efficiency and environmental politics require novel approaches to materials design. A recent example with regard to structural materials is the emergence of lightweight intermetallic TiAl alloys. Their excellent high-temperature mechanical properties, low density, and high stiffness constitute a profile perfectly suitable for their application as advanced aero-engine turbine blades or as turbocharger turbine wheels in next-generation automotive engines. Advanced so-called 3rd generation TiAl alloys, such as the TNM alloy described in this paper, are complex multi-phase alloys which can be processed by ingot or powder metallurgy as well as precision casting methods. Each process leads to specific microstructures which can be altered and optimized by thermo-mechanical processing and/or subsequent heat treatments.
Authors: Liang Li
Abstract: With the development of the aviation industry, the aircraft's increasingly high performance requirements, the overall application of thin-walled structural components became more widespread. However, due to the complex structure parts, thin wall, high precision machining process was complexity, the cutting force, cutting heat, clamping force under the influence of other factors, prone to machining distortion, and with the lower part wall thickness, decreased in rigidity, it was difficult to ensure processing quality. In this paper, we proposed several effective aviation thin-walled parts machining precision control program to solve the problems in the processing of machine structural characteristics of thin-walled parts .The results of experiments and production practice proved that these methods effectively control the air thin-walled parts machining precision machining to meet quality requirements, while reducing the processing time, improve processing efficiency, it was convenient and efficient processing methods.
Authors: Tao Li, Xiao Mei Yuan, Li Chen, Ning Zhang
Abstract: Charge coupled device has many merits, which makes it to measure bullet parameters possible. This article starts with possibility of testing based on charge coupled device, then introduces the completed processing methods and algorithms, finally based on Matlab’s GUI, methods and algorithms integrated, through input parameters, the calculated result is seen immediately before you. This way has characteristic of simplicity and convenience. In order to make this testing system much easier and use convenient, Matlab’s GUI is used to obtain the aim. It can conclude that this testing system is very utility in test field.
Authors: Lisa M. Dangora, James Sherwood, Cynthia Mitchell
Abstract: During the manufacturing of fabric-reinforced composite parts using a matched-die compression molding process or liquid composite molding, the fabric may experience local in-plane compressive loads that cause out-of-plane deformations. The waves that result from this outofplane motion can lead to the formation of resin rich pockets (during the infusion stage of a dry fabric) or they may be forced down into a fold by the tooling. Defects such as resin-rich pockets and folds compromise the structural integrity of the formed composite part. Therefore, it is valuable to have a simulation tool that can accurately capture the fabric bending properties and predict the locations where waves or folds are likely to occur as a result of the manufacturing process. The tool can then be used to investigate changes in the forming parameters such that the development of such defects can be mitigated. A hybrid finite element model used with a discrete mesoscopic approach captures the behavior of continuous fiber-reinforced fabrics where the fabric yarn is represented by beam elements and the shear behavior is implemented in shell elements. User-defined material subroutines describe the mechanical behavior of the beams and shells for their respective contributions to the overall fabric behavior. Simulations are used to demonstrate the ability of the modeling approach to predict the amplitude and curvature of out-of-plane waves. The simulation results are compared with experimental data to show the accuracy of the modeling. Additional models are presented to demonstrate the capability of the simulation tool to capture fabric folding.
Authors: Xiu Lin Sui, Qing Wang, Ru Yang, Qian Wang
Abstract: In order to realize high efficiency and high integration of the virtual manufacturing system and strengthen the integration of CAD/CAPP/CAM, the paper presents the architecture of virtual manufacturing oriented CAPP system and its realizing method. The method of parts information input is used for the system to connect with CAD directly. The system utilizes object-oriented knowledge representation method and database technology, establishes process knowledge database and carries on the effective management. Using the idea of modular, the virtual processing information can be fed back to design system in real-time, the process can be optimized it and form a closed loop CAPP system by using genetic algorithm. The virtual manufacturing technology of CAPP system enhances the design level and quality and improves the flexibility, scalability and dynamic adaptability of CAPP system.
Authors: Achim Frick, Michael Borm, Marcel Spadaro
Abstract: The manufacture of a rotational shaft seal (soft component) adhesively bonded to a polymeric housing (hard component) is not state of the art. The paper approaches the feasibility to shape such hard-soft composite employing assembly injection molding technique.
Authors: Shu Yang Yu, Hai Yan Tan, Xiang Li Weng, Min Xu
Abstract: Carbon in wood accounted for 50% of oven dry weight, and wood construction architecture consumes less energy than any other material architecture. Through using drying of wood, fire-retardant, wood preservative and other protective treatment for the materials of wood construction architecture can extend service life of wood construction architecture and increase carbon storage. This article based on the processing characteristics of wood, estimated carbon storage and carbon emissions of the wood construction architecture, conclude that wood construction architecture has significant influence on the greenhouse effect and the recycling of carbon sequestration.
Authors: Chun Mei Yang, Jing Li, Yan Ma, Jing Ma
Abstract: We make a design of the block diagram of the guard fastening holes processing in this paper. It introduces the car doors composition and functional requirements, uses workbench to analysis the rack to determine its legitimacy. This design not only greatly improved the production efficiency of the car guard fastening hole machining, but also improve design standards and safety of the machine by model simulation analysis.
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