Advanced Materials Research Vols. 299-300

Abstract: The gear pair model with machining errors is constructed based on the software such as Pro/E and ANSYS, and in this basis, the influence analysis about the machining errors on the bearing capability is carried out. The analysis results show that the said influence varies with the increase of load, and however, the tooth profile modification would be more important compared with the machining errors.

Abstract: This paper reports the effect of shoulder diameter on the resulting interfacial regions of joints between aluminium and copper produced by the friction stir welding process. The welds were produced using three shoulder diameter tools, viz; 15, 18 and 25 mm. This paper focuses on welds produced at a constant rotational speed of 600 rpm and feed rate of 50 mm/min varying the shoulder diameters. Analysis of the force feedback revealed that the advancing force, the downward vertical force and the torque increases as the shoulder diameter increases. Microstructural characterization was conducted on the joint interfaces and it was observed that the widths of the interfacial regions comprising of the Stir Zone and the Thermo – Mechanically Affected Zone (TMAZ) increases as the shoulder size increases.

Abstract: Forming is a flexible process, by which a variety of different shapes can be produced through mechanical, thermo-mechanical, or thermal [Laser Beam Forming] process. Laser beam forming [LBF] process has been successfully applied to a variety of sheet metal components thereby plastically deforming it. This paper investigates the producing effect of scan velocity on the resulting curvatures and resulting properties of the bent components. The results show that three different curvatures (120, 180 and 240 mm) of 4 mm AISI 1008 low carbon steel plate was successfully produced under an optimized set of process parameters and a direct relationship was observed between the scan velocity and the resulting curvatures. Furthermore, microstructural characterization revealed that the grain structures of the irradiated surfaces are refined with cooling than the bottom due to the nucleation rate of new grains formed at the irradiated surface.

Abstract: The design and basic implementation of hydrostatic pressure tests automatic control system on oil pipeline(bolster) by siemens PLC and Huabei IPC were elaborated in the paper. The hardware and software flow chart on electrical controls were explained, the application interface was showed. From the actual conditions, the systems possess trusty running and high cost-effective and promotion prospects.

Abstract: This paper focuses on discussing the application of FEA theory and method in calculation of composite structure strength between engine cylinder head and head gasket. Based on finite element analysis software, the integrated system of 3D CAD/CAE application software was developed for the finite-element analysis of the composite structure consisting of engine cylinder head and head gasket. By using the software system, several jobs, such as working condition analysis from preloading to outburst operation, structural analysis and steady-state thermal analysis, and thermo-structure coupling analysis, were carried out. The results studied in this paper provide a new idea and method for the finite element analysis of composite structure between engine cylinder head and head gasket.

Abstract: Forces in Hard turning can be used to evaluate the performance of the process. Cutting parameters have their own influence on the cutting forces on the tool. The present work is an attempt to develop a force prediction model based on full factorial design of experiments for machining EN31 steel (equivalent to AISI 52100 steel) using uncoated CBN tool. The force and surface roughness regression models were developed using the data from various set of experiments with in the range of parameters selected. The predictions from the models were compared with the measured force and surface roughness values. The ANOVA analysis was undertaken to test the goodness of fit of data.

Abstract: A computational model for position and posture error of 6-DOF parallel machines is proposed based on D-H transformation matrix and the inverse kinematics. The model is used to construct a linear least-square identification model for geometric parameter errors. Error identification program and compensation method are also presented. Simulation results indicate that the effects on position and posture of machines are almost equivalent from calculated least-square solution and from real values. The pose error of moving platform can be decreased up to 90% if error compensation is performed by modifying the input kinematic parameters of driving joints.

Abstract: This paper proposed and discussed an INS/GPS integrated navigation method based on radial basis function neural network (RBFNN) to fuse INS and GPS data. When GPS signals were available, an adaptive Kalman filter was used to improve the estimation accuracy of INS errors, and then the RBFNN structure was trained to mimic the dynamical error model of INS. If GPS signals were unavailable, the trained RBFNN structure was utilized to bridge the GPS outages to achieve seamless navigation. Simulations in INS/GPS integrated navigation system showed the proposed method can reduce the positioning error during GPS outages.

Abstract: Structure and function of assembly machine were introduced on the background of engineering project-“research and development of fuse automatic assembly machine”. The control system was realized by protocol communication between S7-300 PLC as on-site control unit and industrial personal computer(IPC). The IPC monitoring system was developed by WinCC V6.0 configuration software and the work process of assembly machine,which includes real monitoring, voice alarm, operation permission setting, data archiving,etc.,was implemented by combining VB and C script. The assembly machine met production requirements by testing.

Abstract: The application of electric power, which acts as a pillar energy and economic artery in modern society, is one of the most important symbols of the level of development and comprehensive national power of a country. Var is a crucial factor for the design and operation of AC power systems, and is closely bound up with the safety, stabilization, and economical operation of power systems. With the development of electrified railway, developing the var compensation strategy vigorously has important senses in theory and practice. In this article, synthetically considering technique and economic leval of power systems in our country, parameters design and verification and specific engineering application of TSF var compensation method are presented. This method is a preferable one for resolving undesirable effect on power systems of electrified railway, especially having dynamic and real time characteristics of var compensation.