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Compound Molecular Pump Rotor Design Based on UG Software and Research on Processing Technology

Author: WangZhenDe
Tutor: BaDeChun；LiuKun
School: Northeastern University
Course: Fluid Machinery and Engineering
Keywords: CNC programming parametric modeling CAM VERICUT machining simulation machining accuracy
CLC: TG659
Type: Master's thesis
Year: 2009
Downloads: 41
Quote: 0
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Abstract


Compound molecular pump is set the merits of the two pumps in one. This pump has a larger pumping speed and higher compression ratio over a wide pressure range (10-6～1Pa), which greatly raised the pump outlet pressure. Processing of complex molecular pump rotor has very high requirements on machine tools, processing technology and CNC programming of CNC technology. Processing of complex molecular pump rotor become the direct restrictions on the domestic development of compound molecular pump. NC technology is the important foundation and key technique of the mechanical machining modernization and military industry development. NC machining can raise production rate, keep machining quality steady, reduce machining cycle, improve production flexibility, carry out the automatic manufacture of all kinds of complicated and exact parts.In this paper,the history, the contents and status quo of research, a complex three-dimensional molecular pump modeling, programming and virtual machining simulation is completed by UG NX, which, at present, is an Advanced mechanical engineering system consisted of CAD, CAM and CAE together in the world. The specific content including:First of all, analysis the three forms of leaf processing of the current turbo-molecular pump accomplished the three-dimensional modeling of the overall rotor. Then, analysis Processing technology of the overall rotor, work out the card process card, Apply the UG/CAD module to complete the rough, fixtures and machine tool geometry of the parametric modeling. On this basis, program CNC milling process for overall leaves in use of UG/CAM module, optimize the processing route, tool path, cutting process parameters, etc, generate a high-precision processing and efficient five-coordinate NC program. Checked Cut-off and less cut through the tool path and. Through the professional process simulation software VERICUT simulates the processing environment and machine tools, cutting tools to avoid interference with the movement to optimize processes. Analysis the accuracy of processing, then work out a specific ways to improve the machining accuracy.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Program control machine tools, CNC machine tools and machining
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