The experiments were carried out in the paper to investigate the effect of adding hydrogen in titanium alloy TC4 on its machinability. The hydrogen contents selected were 0, 0.25%, 0.49%, 0.63%, 0.89% and 1.32%, respectively. Experiments with varing hydrogen contents and cutting conditions concurrently. Experimental results showed that the cutting force of the titanium alloy can be obviously reduced and the surface roughness can be improved by adding appropriate hydrogen in the material. In the given cutting condition, the titanium alloy TC4 with 0.49% hydrogen content showed better machinability.
Based on the cutting performance parameter of hardened steel 7CrSiMnMoV and the application of fuzzy synthetic evaluation principle, the essay establishes a two-level fuzzy synthetic evaluation model of the machinability of 7CrSiMnMoV. Choosing cutting force, cutting temperature and surface roughness of the workpiece produced during machining process as the evaluation index, data are measured through experiment and a synthetic evaluation of the machinability of hardened steel 7CrSiMnMoV is conducted. The result shows that it is reasonable to use cutting force, cutting temperature and surface roughness of the workpiece as evaluation index to evaluate the material machinability. And it also provides guidance to the selection of tools and the technological parameters during the process of cutting 7CrSiMnMoV.
Modern industrial design has been extended to the whole product life cycle of production, manufacture, sale and recycling from traditional appearance design and product performance. Facing today’s intense and diversification market competition, product design must be taken the whole product life cycle routes based on design, quality, economic and environmental protection. Starting from the design, designer should concern about the product life cycle of the product in each stage of the design process, and use design principles and methods for product design reasonable. With quality competitive as the basis for product, with economic environmental competition as improve quality of power, industrial design can provide high quality product and create a perfect user experience, in order to reduce pollution and satisfied our clients’ needs. In this paper, industrial design processes and methods for product life cycle are discussed and analyzed systematic, so as to product designers of the designer to provide methodology.
Global energy shortages and climate change promote low-carbon economy become an important research focus. The application mode of low-carbon economy in the construction of new residential area has important theoretical and practical value for the promotion of sustainable development in resource-based society. In this paper, a “Green residence” mode is discussed by using the low-carbon technology of heat preservation and the renew resources application. The “Green residence” integrates the ecological energy resources such as solar energy system, biomass energy, gray-water system and building materials. The mode focuses on the environmental protection and low-carbon emission, and tries to provide some guide for the construction of new residential area.
This article presents the transformation path for logistics enterprises: service standardization and specialized division with a sharing and innovation mode. In this way, interest-concerned parties can get what they want through the integration of information technology, creative channels, business procedures and customer relationship.
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