Advanced Materials Research Vols. 774-776

Abstract: This paper is presented fuzzy preference relations approach to forecast the success of implementing advanced manufacturing technology (AMT). In the manufacturing environment, performance measurement is based on different quantitative and qualitative factors. This study proposes an analytic hierarchical prediction model based on fuzzy preference relations to help the organizations become aware of the essential factors affecting the AMT implementation, forecasting the chance of successful implementing AMT, as well as identifying the actions necessary before implementing AMT. Then predicted success/failure values are obtained to enable organizations to decide whether to initiate AMT, inhibit adoption or take remedial actions to increase the possibility of successful AMT initiatives.

Abstract: This paper shows an approach to statically balance an anthropomorphic robot with two degrees of freedom (DOF). Energy transfer is introduced to illustrate the way energy exchanged between the robot and a proposed balancing system. The balancing system, which consists of pulley, belt, cross mechanism and spring accumulators, is designed to balance the linkages of the robot. Two solutions for spring and accumulators are explained as pneumatic and hydro-pneumatic way. Perfectly static balancing is realized with the balancing system. The balanced robot has a wide workspace and an adjustable payload according to different industrial tasks.

Abstract: The development of a fuzzy navigation controller for wheeltype agricultural vehicles with mechanism steering system was presented. The fuzzy controller was designed based on heading angle error and cross track error. The incremental PID control method was used for front wheels turning control. Simulation was done based on two wheels vehicle model. Automatic navigation control system was also developed,which was made up of the upper computer and the lower controller part. The upper computer was a flat industrial computer, and the lower controller was developed by ARM7. The experiments were done in the Xiaotangshan National Demonstration Base for Precision Agriculture. The cross track error of line track using this system was less than 0.12m, and the average cross track error was 0.04m.

Abstract: In recent years, China's increasing demand for precision machining and auxiliary processing, technological innovation is increasingly urgent. After a summary and integration advantages of virtual prototyping and computer-aided software, developed a General Purpose low-load industrial robots. In this paper, the D-H method in MATLAB to establish a three-dimensional diagram of the industrial robot. Using ANSYS to do a check of the stiffness of the important components of the industrial robot mechanical systems. Finally, after the structure static analysis and verification, to improve the design of the structural components of the robot. Obtained according to the repeatedly comparison of the overall shape of variable verification data, which prove that the design is correct.

Abstract: On the rotary drilling system, the technologies for fracturing and cutting hard rock are mainly mechanical rock breaking methods by use of improving bottomhole water horse power and bit energy, and the working life and rock breaking efficiency have much room for improvement. Microwave crag broken is a thermal assisted rock breaking method which could melt rocks. Microwave assisted rock breaking method will not bring new impact, wear and tear, instead, the microwave pretreatment on the rock reduces the difficulty of breaking rock and prolongs the service life of the drill bit. Under the combined action of microwave heat and mechanical energy of PDC bit, the rock breaking efficiency is improved greatly, and the drilling cost is reduced significantly.

Abstract: In 21th century, the product upgrading becomes faster and faster. The development of varieties of production needs rapid manufacturing technology. The rapid fabrication of sand mold & core is the key of rapid casting. In this paper, the rapid manufacturing technology without pattern was applied to produce the complicated sand molds & cores of pump case. The digital precision forming technology without pattern casting was selected to mill the outer sand mold. And the Selective Laser Sintering (SLS) technology was used to print the sand core. So the complicated sand molds and cores were fabricated rapidly without pattern. As a typical digital manufacturing technology, the rapid manufacturing technology without pattern has a variety of benefits such as short cycle, low cost, flexibility and so on. The technology that combines the sand milling and SLS provides a high-efficiency method for the Single and small batch castings.

Abstract: The sectional area of air return inclined shaft 1 in Hecaogou coal mine is 20.7m² and the dip angle is 20°. It belongs to the large angle and section inclined shaft. The soil of mining area has the characteristics of loose, poor stability and integrity, low compressive strength, easy to be in the rheological and pulverization. After the first support in hidden digging section of air return inclined shaft 1, the soft and collapsible loess strata turned into the shape of silly putty because of the construction disturbance, which caused serious deformation and subsidence to that shaft. We succeed to pass the extra thick soft and collapsible loess strata and obtain the expected effect the by means of analyzing deformation principle of surrounding rock on shaft and grouting reinforcement of rail pile and advanced support of exploration of thread steel and metal wedge and comprehensive technology of using stone to take the place of the floor loess. It has reference significance to the other shaft and drift construction with the similar formation condition

Abstract: With the development of the international shipping market and the expansion of the market demand, the ship welding plays an increasingly important role. This paper comprehensively introduces the properties of ship welding materials, its application status, inadequacies and development prospects in the shipbuilding industry. High-quality welding has been widely used in the ship construction, coupled with the steady increase in the welding efficiency and quality. The ship welding materials ensure the multiple requirements of ship operation, which implies that it will be more widely used in the shipbuilding industry.

Abstract: The background and history of COREX smelting reduction was introduced. And the technological process was provided, including the main chemical reactions in COREX process. According to the operating state, COREX process characteristics and development direction were summarized.

Abstract: A thermal model was established for the study about influence of collapse phenomenon on unburned pulverized coal in COREX melter gasifier. In the model, the ore was simulated by wax, the coke and lump coal were simulated by maize, UPC is simulated by pulverized coal. The results showed that too high blast temperature could lead to collapse in the model, and under normal or collapsing furnace state, UPC is dispersed or aggregated distribution in packed bed. According to this experimental results and the previous research results, the suggestions about COREX were given at last. Keywords: COREX melter gasifier; pulverized coal injection; unburned pulverized coal; physical experiment