Papers by Author: Xiu Lin Sui

Abstract: In order to improve efficiency of the cutting tool in the practical production process and mend the phenomenon of disjunction between previous NC cutting tool matching and cutting tool management, integrate matching with management of cutting tool and regard Access as the backstage database and apply VC++6.0 software to develop database management systems of cutting tool matching and management. The production process of cutting tool efficient matching and the management process of cutting tool information is studied, according to the application requirements of system, then the function target of the system realization is established, the overall structure model of the system is constructed and the function and operation procedure of each functional module is designed.

Abstract: In order to realize high efficiency and high integration of the virtual manufacturing system and strengthen the integration of CAD/CAPP/CAM, the paper presents the architecture of virtual manufacturing oriented CAPP system and its realizing method. The method of parts information input is used for the system to connect with CAD directly. The system utilizes object-oriented knowledge representation method and database technology, establishes process knowledge database and carries on the effective management. Using the idea of modular, the virtual processing information can be fed back to design system in real-time, the process can be optimized it and form a closed loop CAPP system by using genetic algorithm. The virtual manufacturing technology of CAPP system enhances the design level and quality and improves the flexibility, scalability and dynamic adaptability of CAPP system.

Abstract: Aiming at NC milling processing simulation problem, a ball-end cutter milling force model is established, the numerical simulation analysis of aluminum alloy AL2024 milling process is conducted by using the finite element analysis software AdvantEdge FEM. Focus on the Milling force simulation, the size of the milling force is obtained by simulating calculation. Using the same cutting parameters for milling experiment, the results show that simulation analysis of the cutting force values are in good agreement with the experimental results，the milling force model prior established is correct. The research laid a foundation for the perfect CNC milling simulation system.

Abstract: According to the requirements of the machined workpiece and the actual cutting conditions, the four cemented carbide face milling cutters with equal pitch are selected, using orthogonal test method, the four factors are studyed ,including spindle speed ,feed per tooth ,axial depth of cutting,radial cutting width, and determining the optimal cutting parameters of the milling tool under the condition of different cutting parameters, to improve processing efficiency and surface quality.

Abstract: Knowledge base of milling feature machining based on relational database is proposed, using knowledge representation of production rules, according to the characteristics of feature machining knowledge. Tool selected reasoning mechanism and reasoning processes is presented basing the installed CNC milling tool database , and further reasoning is based on knowledge, milling tool selection method is implemented based on feature machining knowledge using the forward direction inference strategy .In the paper, a complete system of the selecting milling cutter is established. The system connects not only the theoretical knowledge but the expert’s experiences with the computer applications in order to provide a base of realizing the automatic mechanical processing. By the example of machining tool selection for complex surface, the selection process is described, and the system can select the tools to meet the processing requirements within a shot time, and has good versatility.

Abstract: The prediction of flatness is researched based on the simulation of virtual NC manufacture process. In this paper, a new interpolation-regression model is proposed, which is based on the simulation method of the finite element analysis and depends on MATLAB to realize the calculated algorithm of flatness error. In the model, on the premise of that the workpiece is completed the simulation, the information of numerous discrete points is acquired from the virtual workpiece. A new surface which is much closer to the workpiece morphology is generated by interpolation theory with statistics toolbox of MATLAB. The assessed datum of flatness is concluded by the theory of the multivariate linear regression. Synthesizing the original points and the created datum, the work calculates the flatness error and develops the flatness predicted system of virtual workpiece. The system can realize the vivid man-computer interaction in MATLAB.

Abstract: Aiming at NC milling processing error problem, ball-end milling cutter is taken as researching object, its the stressed deformation, heated deformation, tool wear and workpieces’ heated deformation are modeled. The milling comprehensive error at all coordinate directions are obtained with superposition method. Corresponding error prediction and compensation scheme are put forward, and milling error models are tested and verified through experiments, thus to make try cutting cost reduce and processing efficiency improve, to lay the foundation for NC milling machining simulation system improvement.

Abstract: In this paper, influence mechanism of variously physical factors for milling force in any feed direction is studied during the milling process. Firstly, the effects of spindle eccentricity, cutter deflection and cutter vibration for the instantaneously undeformed cutting thickness are analyzed, and the mathematical expressions of chip thickness is set up. Then,on this basis of cutting force and chip load, the milling force model of ball-end mill with considering integrated physical factors is established though the differential method, and a simulation system for prediction of milling forces during the milling process is developed. This milling force model is verified through simulation and analysis of milling forces.

Abstract: Aimed at the problem of reading and controlling UG files by OpenGL in VC++ environment, a method of object-oriented programming is proposed. The OpenGL single document, multiple documents and visualization windows are created by using the classified idea in VC++ environment. PRT format data files of UG are converted to DXF format data files. Not only the conversion rate but also the conversion quality of different format data file are ensured by using the intermediate conversion format CGM and the problems of redundancy lines and view missing are prevented. DXF files are converted to 3DS files by 3DS MAX software. Controlling and redrawing of UG files in OpenGL are realized. The Object-oriented method is better than process-oriented program design method on the reliability and operability of procedure. The method has been applied in the virtual CNC milling system and provided a theoretical basis for the development of visualization system.

Abstract: In this paper, a new mathematical model and modeling method of ball-end milling cutter which satisfies the request of physical simulation in virtual NC machining system are proposed. The accurate expressions of the cutting edge are presented. The precise functional surface model of ball-end cutter is developed. And the 3-D visualization for ball-end milling cutter in virtual NC machining is implemented. The model can provide necessary and accurate geometric information for physical simulation and has been applied in milling force simulation. It laid the foundation for integration of geometric simulation and physical simulation.