Advanced Materials Research Vols. 588-589

Abstract: Based on the function structure tree ,the spot failure data of CNC grinding machine were analyzed and found out that of the all failure positions in the subsystem of the CNC machine was High-frequency Motor Built-in Spindle an high failure frequent and main criticality failure position . By further in detail analysis found out that the main failure cause of the CNC grinding machine was burning out of components. It was defined the main direction to improve the reliability of this CNC grinding machine and put forward the corresponding improvement measures. It can offer a theory basis for the reliability design and analysis of CNC machine tool .

Abstract: Spray cooling is considered to be one of the most promising electronic cooling methods, since it has several unique advantages such as high heat dissipation, small fluid inventory, and uniformity of heat removal. However the spray cooling performance could be further improved, which can be expressed by the combination of a better heat removal capability, a higher cooling efficiency, and the more uniform surface temperature distribution. In this paper, recent research developments on spray cooling characteristics under different working conditions are reviewed, possible approaches to improve the spray cooing performance are also proposed. Especially spray cooling systems with both enhanced surface and lower system pressure would be be full of attraction.

Abstract: In order to in-depth study the weak part of the turning operation of the turning and milling machining centers during the work process, the three-dimensional structure model is established, and the static stiffness analysis and modal analysis are carried out. The deformation of each main part is grasped, which can determine the main deformation component. All above will provide the theoretical basis for future improvement of the machining centers.

Abstract: In this paper, we report our experimentation about measurement temperature of ignition cuts and chip phenomenon using infrared imaging methods, to model and simulate machine rotary cutting tool system. Finally this research was obtained of the optimum conditions expected of cutting magnesium at high speed and without coolant.

Abstract: Virtual manufacturing technology in being one of the best technology recently, it’s manufacturing philosophy based on information integration. Manufacturing function/concept/core technology/application of VRM (hereafter referred as virtual reality manufacturing technology) as are fully described in this essay. Nowadays, manufacturing industry is being marching rapidly towards precion/automation/flexibility/integration/information/intelligence with the time going on. Consequently, many advanced manufacturing technology and model have been created, in which intelligent manufacturing and VM become most important part and this will bring a bright revolutionary future.

Abstract: Based on the high-speed photography, the effect of phase relations on droplet transfer and welding seam was analyzed. To each TCGMAW (Twin-wire Co-pool Gas-shielded Metal Arc Welding) torch at four-wire welding robot, under the descriptive welding parameters, when the phase relation of the front wire and the back wire was alternate, the arcs of the two wires had no effect on each other basically; the welding seam shaped very well. When the phase relation was synchronized, the arcs attracted each other and the two arcs centralized to the middle of the two wires; the humping bead was formed. When the phase relation was random, now and then the arcs synchronized and attracted each other, and at times the arcs changed alternately and had no effect on each other; the appearance quality of the welding seam was moderate.

Abstract: High pressure gaseous hydrogen energy is the most mature technology of hydrogen utilizing. High pressure gaseous hydrogen storage involves with high pressure vessel. In this paper, the research of high pressure gaseous hydrogen storage vessel is reviewed, and the research progress of multi-layer vessel used as high pressure hydrogen storage vessel is especially introduced. An integrated multi-layer-wrapped cylinder which may be used as high pressure gaseous hydrogen storage equipment is analyzed. The cylinder consists of lining, internal cylinder and multi-layer laminates. Lining and internal cylinder are made of anti-hydrogen steel, while the laminates are wrapped outside the internal cylinder to the required thickness with integrated wrapping method. The circumferential and longitudinal welding seams can be staggered in each laminate. The hydrogen leaking detection device is located in each cylinder section. This cylinder is provided with bearing pressure, resistance to hydrogen, anti-burst, online safety monitoring and other characteristics, which offers a possible structure for the construction of high pressure hydrogen storage vessel.

Abstract: In the production process, the cost estimate has a direct impact on the product design and economic efficiency. The establishment of process cost estimation model based on features and intelligent computation can quickly and accurately estimate the process cost of product with high precision. In the condition of poor basic data and inadequate labor power, material and financial resources, carry out the study and practice on the locomotive axle process cost estimation based on features and intelligent computation from the product process. This method can quickly estimate the cost of the product with a high use value.

Abstract: The purpose of this research is to fabricate maxillofacial biomodel and apply the rapid prototyping technology using Fused Deposition Modeling (FDM) in solving some surgical problem in medical field. The build biomodel will be used in educational and pre-medical surgical environments. Besides, it can simplify the complex surgical procedures and the visualization of anatomical structures. A machine that works under FDM principle will be used to produce a finished biomodel. Product analysis later is implemented to make the result more trustful. Thus, it is demonstrated that biomodel can help surgical planning and at the same time it will reduce costs, surgical times and infection risks in health care system.

Abstract: For the difficult problem of the flange-forming prefabricated hole size design for tee pipe, based on the principle that in the deformation zone the length of bore plain wire does not change, make the establishment of a mathematical model of the prefabricated hole flange-forming of tee pipe, and by value solving methods to solve the mathematical model, establish a software system for prefabricated hole flange-forming of equal diameter tee pipe. In order to verify the reliability of this article to build the mathematical model and its solution, taking engineering for example, apply the method of finite element simulation to verify the mathematical model and the solving system, and the results show that the mathematical model constructed in this paper can relatively accurately make calculation of prefabricated hole size of flange-forming of equal diameter tee pipe.