Papers by Author: Suo Xian Yuan

Abstract: Vibration signal produced by imbalance of grinding wheel is a periodic signal that has a same frequency with rotational speed. To identify the signal accurately is premise of balance for grinding wheel. This paper introduces the composition and basic concept of vibration signal in grinding wheel and further studies how to identify process and calculate about this vibration signal. It will provide theory evidence for grinding wheel’s dynamic balance.

Abstract: This paper presents a new type of two 2-DOF Parallel 2PRR institution, with the unique advantages such as simple motion modeling and easy calculation of the positive and negative solution, operating a large space, simple structure and easy to control, etc. This parallel mechanism can not only be used for the development of glass cutting, grinding materials, milling, processing equipment, spare parts and other planes, but also can be used as a multi-DOF hybrid machine tool flat actuator parallel mechanism which can give full play the advantages of strong reconfiguration, with the main different combinations of auxiliary bodies and set up to meet the individual needs of the user reconfigurable manufacturing cell to be more complex parts processing and high-speed machining.

Abstract: Modal analysis for the truss structures of machine tool is very important. based on ANSYS, according to the truss structures of machine tool, the modal analysis is carried out in this paper. Afterwards, the first ten natural frequency, corresponding mode shape is obtained. By means of animation, ten-order modal vibration rule has been analyzed. The modal analysis is made by ANSYS11.0. It provides the theory for the design and application of truss structures.

Abstract: In recent years, the demands on product performance are improving, particularly in the aviation; electronics, precision instruments and other fields, the accuracy and quality have become the most important. So lapping is getting increasingly importance with its high precision, good processing quality. In this paper, the processing parameters, which have effect on processing accuracy and efficiency in the process of planar lapping, have been analyzed emphatically. The effects on surface roughness of various processing parameters have also been investigated.

Abstract: As a new technique integrating grinding and polishing, the technology of abrasive belt grinding is considered as a processing method with high quality, high efficiency, low consumption and wide range of application owing to its features of high processing efficiency, “cold” grinding, stable grinding speed, high precision and low costs. Taking aluminum alloy material as object of study and on the basis of the grinding technology of surface abrasive belt grinding machine, this paper carried out in-depth experimental study on the grinding mechanism of abrasive belt with aluminum alloy materials.

Abstract: Grinding temperature is the main factor to limit the improvement of grinding efficiency. The main reason of grinding temperature rise is amount of heat transfer into the workpiece in grinding process. How to determine the proportion ratio, which heat transfers into the workpiece, is the main research issue to the precise machining scholars. In this paper, the heat resistance model is used to analyze the proportional coefficient about how much heat transfer into the grinding wheel, and the factors which to influence this coefficient are discussed. The moving heat source method is used to calculate the temperature field caused by single grain heat source, and the heat integral method is used to calculate the heat contains by the grinding chip, and then the heat proportional coefficients transferring into the chip and workpiece are determined respectively.

Abstract: Quick-point grinding is more advanced and more efficiency as a method of high and super-high speed grinding. Its main grinding properties are low grinding forces and temperature. Its basic characteristic is the axis of wheel and workpiece are not parallel and not contained by the same plane. That makes the geometrical property of the quick-point grinding different from conventional cylindrical grinding. This paper emphasizes particularly on the abrasive geometry analysis on the quick-point grinding. After founding a model, this paper has educed equivalent wheel diameter, maximum contact length, undeformed chip thickness and so on. In this paper the quick-point-grinding angle is made use of to find a model of grinding force and deduce an expressions.

Abstract: Due to the high grinding speed and the less contact length, there is the super high material strain rate in the contact layer during quick-point grinding process. Based on the principle of micro-damages mechanics, it is the impact process between the workpiece and the grits on the wheel in the process. The weakening effects of the super high strain rate caused by the mechanical impact micro-damages and the adiabatic shearing damage can lower the dynamic strength of the material in contact layer and the micro-plastic pile-up deformation on the ground surface in the process. Therefore, it is possible to improve the surface integrity of the workpiece since the materials removal mechanism is changed in quick-point grinding process. In this paper, the impact performances and the model of quick point grinding process were studied. Based on the above, the model of the ground surface roughness related to the plastic pile-up deformation was established. The effects of the strain rate on the ground surface roughness and the materials removal ratio were analyzed. In addition, the grinding experiment was performed to testify such investigations. It is indicated that quick-point grinding is an impact process assuredly during the removing material process.

Abstract: According to the analysis in theory, the model of quick-point grinding is different from conventional cylindrical grinding because it is point contact between the grinding wheel and the workpiece due to the point-grinding angles in two directions and the lower grain depth of cut in the process. Especially, the grinding speed has the great effects on the micro-geometry properties and the machining precision of the workpiece surface in the process. Based on the theoretical studies on the surface roughness, the grinding experiments and the measurements of the surface roughness at high grinding speeds were performed in quick-point grinding process. Furthermore, the influencing mechanism of the grinding speed on the ground surface roughness was analyzed. Some conclusions of the grinding parameters influencing precision machining and surface integrity were deduced.

Abstract: It is innovative to combine abrasive jet machining and conventional grinding together in this thesis. And it realizes a new sort of grinding wheel restricted with abrasive jet processing. The three-dimensional mathematical model of hydrodynamic pressure of wedge-like grinding zone between grinding wheel and workpiece on abrasive jet finishing with wheel as restraint was established, and the finite elements simulation analysis for the hydrodynamic pressure was implemented. This paper investigated the liquid hydrodynamic pressure, the regularities of distributing of velocity, influencing factors and the affection for processing technique.