| Combined machining technology as a kind of the modern manufacturing adapt to many varieties, small batch, the demands of the new technology with individuation development, integrated with modern control technology, precision measurement technology and the application of CAD/CAM technology and so on, provided advanced processing solution programs for complex parts, high precision parts and difficult to machine parts, has become the important direction of the development of advanced manufacturing technology. Five-axis CNC Turning-Milling complex machine tool has become a hot research topic because of its widely processing technology.In five-axis CNC turning-milling complex machine tool design process of introducing the virtual prototyping technology, it is parallel from overall consider the function of the whole life cycle of machine tool structure, process planning and manufacturability, assembly, testability, maintainability, reliability, various aspects of the requirements and the mutual relationship, through the continuous optimization of the design of programs which to improve the design quality of the machine tools.In this paper, it is the goal with high efficiency, high precision processing complexity surface parts in oil and gas industry which based on virtual prototype technology, design a new type of five-axis CNC turning- milling complex machine tool. The main contents include:1. Research on the transformation of the motion coordinate of Turning-Milling complex processing. For the processing of complex of kinematics transform issues with turning- milling complex transverse, cylinder and inclined plane, research on turningmilling complex process characteristics and the kinematics relationship of the machine, conducting moving coordinate analysis and solution respectively, it is concluded that the movement path of the Cartesian coordinate system tool and the dynamic transformation method of the coordinates of the motion among the machine tool coordinate system which provide some bases for the structure of the machine of configuration forms, track control, programming and so on.2. The structure of innovation design of five-axis CNC turning- milling complex machine tool, According to the requirement of oil and gas industry in various parts of the machining equipment, designed a new type of structure of five-axis CNC turningmilling machine tools. Completed the layout research of machine structure; design calculation and selection of machine tools for turning spindle and milling spindle; innovative develop a new type of B-axis Turning-Milling complex element can achieve fast and reliable which realized Turning-Milling processing module of the conversion. Designed the servo feed system of the machine tool, and studied the closed-loop control strategy to improve the performance of the servo system.3. The calculation of kinematics equation of five-axis CNC turning- milling complex machine tool, established the kinematics equation of the new five-axis CNC turning- milling complex machine tool and solved the kinematics equation of forward and inverse solutions. Based on the forward and inverse solutions of kinematics equation which researched and analyzed on the reliability of the machine tool precision and given the influence degree of the kinematic parameters of the motion precision reliability of machine tool.4. Modeling and performance analysis of the virtual prototype of CNC machine tools. Based on the platform of virtual prototype technology. Proceed the modeling and assembly of digital prototyping of the core module of machine tool, conducted static and dynamic characteristics analysis of the whole machine structure, spindle unit and the B axis turning-milling combined unit, servo feed system which utilized finite element analysis and kinematics analysis software, optimized and improved deficiencies in the design of each module on the digital prototype. |
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