Papers by Author: Li Feng Yang

Abstract: In order to realize the industrial computer can control automatic adjustment of linear motor, design the linear motor control scheme based on virtual instrument technology. System driven by the control card of GE series, based on the LabVIEW development platform, realizes the intelligent control of linear motor.

Abstract: In order to improve precision, outdated measurement method, complicated structure and weak anti-jam ability in liquid level measurement, a set of liquid level system was designed with the core of high-precision laser displacement sensor. The system adopted non-contact laser trigonometric survey method and powerful virtual instrument techniques. It could conduct online and real-time measurement to infinitesimal displacement on liquid level with high speed and precision. Through measurement experiment, its accuracy and practical applicability is verified.

Abstract: The thin-walled complex parts reverse engineering is very different from conventional parts or the parts have some simple surface reverse engineering. There are some features. For example, it may have a lot of surface, structure complex, and it is difficulty that scanning point cloud data. Through this thesis, we put a stent by pedal as a thin-walled complex part, introduced some technology about it reverse engineering.

Abstract: Based on the powerful function of MATLAB software in curve fitting of data, this paper introduces the commonly used method of MATLAB in curve fitting, and uses the polynomial fitting function provided by MATLAB to curve fitting the experimental data of the pressure drop determination of the tube side and shell side of the heat exchanger.The results show that it is much easier and more accurate than traditional ways to curve fitting using the MATLAB.

Abstract: Use Kingview to acquire and display the centrifugal pump performance parameters for the real-time data, and will stored the collected experimental data in Access databases, using VB database read, and drawing function for the data processing and rendering performance parameters of relationship curves.

Abstract: Abrasive flow machining (AFM) is an effective way to the irregular surface and internal structure of parts polished, debarred, filleted finish machining and so on. Presently abrasive flow machining is primarily applied for aviation, aero-plane in China, but it hasn’t been used widely. Because there are still many technical problems to be solved, such as: the studies on AFM equipment, preparation of abrasive and cutting mechanism. In order to further improvement of AFM technology, a lot of experimental research should be done. In this paper, by Pro/E design for the experimental device, and by ANSYS analysis of mechanical properties, and finally the test device can be verified to meet the test requirements, and achieve the test successfully.

Abstract: Through analysis of abrasive flow machining principle, this paper explores the design of equipment which is suitable for nozzle micro-hole abrasive flow machining. Based on catia，a cad software, three-dimensional models of the parts are drawn and assembled together. Based on the Finite Element Simulation software ansys, the finite element analysis of the key components of the equipment can be achieved. Through the result of simulation, the design of the equipment is reliable, and is able to satisfy the requirements of strength and rigidity. It offers the theoretical basis for optimizing abrasive flow machining equipment. Through the result of tests, the system of the equipment runs steadily and the ideal abrasive flow machining effects can be achieved.

Abstract: The main component of turbine is made up of stator and rotor, w hose function is to transform liquid energy in to mechanical energy on the main shaft. ANSYS CFX－BladeGen is applied to model turbine , ANSYS CFX－TurboGrid is applied to create a mesh for an turbine blade and then numerical simulation calculation on the obtained model is conducted. In the fact, the result of the above calculation indicates that ANSYS CFX BladeGen is more convenient and swift to fulfill the modeling request of turbine blade. When the performance of the turbine blade is achieved, these blades’ geometric data can be directly exported to Pro/ENGINEER or AutoCAD so as to further CAD and CAM.

Abstract: Experimentation modal analysis is the major technique for the mechanism dynamic properties. This study proceeds dynamic analysis in XK7132 NC Drill and Milling Machine with experimentation modal analysis. Thereby it gets the modal parameter of the tool of main shaft systems. It takes clearly reference for the rationalization design of main shaft systems in NC drill and milling tool.

Abstract: Magnetic Abrasive Finishing (MAF) is relatively a new finishing technique which employs the magnetic force for finishing. In this paper, the influence of the magnetic flux density on the finishing pressure and the finishing efficiency during finishing is analyzed. With the cylindrical magnetic finishing apparatus developed by the author, a series of experiments on finishing the cylindrical surfaces of nonferromagnetic materials and ferromagnetic materials are carried out. To solve the problems of low finishing efficiency and abrasive particles escaping easily because of lack of finishing pressure during finishing nonferromagnetic materials, a new method of increasing the finishing pressure by using the “pressure-increasing bag” in the finishing system is put forward. A lot of comparative experiments on finishing nonferromagnetic materials with the “pressure-increasing bag” and without the “pressure-increasing bag” are performed. Under the same experimental conditions, the amount of diameter-reduction
d is increased from 1μm to 1.88μm and the surface roughness is improved from Ra0.315μm to Ra0.250μm by using the “pressure-increasing bag”. The results show that the finishing pressure is increased obviously and the MAF efficiency of finishing nonferromagnetic materials is improved dramatically by using the “pressure-increasing bag”.