Research On Multi-axis NC Machining Technology And Parameter Optimization Of Axial Blade

With the rapid development of the global economy and increasingly fierce competition of market, the aerospace, automotive, mold and power generation for complex freedom surface were prompted and the requirements for quality of these filed are also increasing. With high-performance computers and numerical simulation technology were used in the field of machinery manufacturing, it is a inexorable trend that computer numerical simulation replace the traditional "Test Cut" process, Which is very important in the modern machinery manufacturing research.As a kind of equipment, Vane type fluid machine is widely used, and it plays an important role to facilitate national economy rapidly. Especially in modern power generation industry, most of the electricity is borne by the vane type fluid machine (Steam Turbine, Hydraulic Turbine, Wind Turbine, Gas Turbine). As the core components of the leaf blade type fluid machine, it is a large complex freedom surfaces with the characteristic of variable curvature and large distortion. At the same time it is a difficult problem to predict milling performance in the process. Therefore, it is an important significance to use accurate and effective method for computer simulation to predict milling performance of the blade curved surface parts.The large axial flow blade was used as the research object, at the same time its milling process and a series of issues were researched. Firstly, the 3D model of the blade is calculated by using the reverse model building principle, and the analysis of the surface fairing was completed. On this basis, The analysis of digital processing technology and programming of blade was achieved, and the NC machining tool path was calculated. Based on post processing algorithm, leaf blade five axis digital processing special post processor was constructed, then the post processing of the tool path file was completed. A model of milling process based on integrated performance was presented, and based on integrated optimization platform OPTIMUS, The analysis process of the cutting performance of process integration and optimization was constructed. Considering the effects of geometric and physical factors that included the process of machining efficiency and machining error, the blade milling process was optimized. Finally, the virtual machining simulation environment was constructed, and through this, the flow process of the blade is verified. The test cutting cycle was more shorten and the processing efficiency was improved.In this paper, the research results are not only a milling performance analysis and optimization method for complex freeform surface parts to provide a basis for cutting force fast prediction, but also can reduce the large complex parts try cutting and clamping adjustment times, before the actual machining process. It is an very important significance to reduce the production costs, save cost, improve security of CNC machining systems and achieve high performance computer simulation in mechanical manufacturing processes.