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Tool-Path Optimization for Flank Milling and CFD Simulation of Centrifugal Impeller Blades

Author: ZuoJuan
Tutor: YuDaoYuan
School: Huazhong University of Science and Technology
Course: Industrial Engineering
Keywords: Fluid Surfaces Side milling Path optimization Envelope surface Fluid design
CLC: TG54
Type: Master's thesis
Year: 2008
Downloads: 126
Quote: 0
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Abstract


The overall impeller blades work surface is a complex space free-form surface design goal to have a good flow properties. The side milling processing with its unique characteristics, growing a wide range of applications in the field of centrifugal impeller blade surface machining. Through in-depth research and analysis of the problems that exist in the centrifugal impeller design and manufacturing process, overall impeller blades mostly distorted ruled surface, side milling path planning, there is no uniform rules, imperfect control of processing errors, the processing of the fluid surface design applications are limited. With the improvement of fluid modeling technology to improve the flow characteristics of this type have the level of free-form surface machining is becoming increasingly urgent. This article focuses on the the impeller ruled surface class blade curved design and manufacture of fluid technology, design and overall optimization algorithm based on the the cone cutter finishing side of the envelope surface milling tool path. First, analysis of the the curved impeller hydrodynamic design process, and given the overall architecture of the centrifugal blade CNC machining process. Then, based on the the cut contact side milling tool path calculation method given in pursuance of Bedi, knife sites and the tool axis vector. Kinematics trajectory tool to be processed surface interactions the discrete cut contacts for each position, and constitute the tool envelope surfaces. Considering error calculation tool interpolation process of cutting overall error given ruled surface characteristics of the envelope surface error calculation method. With a smaller error of tool path planning boils down to the shortest path problem of the network planning tool sampling interpolation process tool envelope surface and the design surface between the smallest error to solve optimization objectives. Established from the point of view of reducing the envelope surface error for the conical cutter side milling tool path optimization calculation model, to obtain a complete the side milling tool path generation algorithm. The instance validation as well as the error calculation Simulation results show the effectiveness of the proposed algorithm. This paper envelope optimization algorithm to obtain discrete movement of the tool envelope surface. Finally, for such special flow fairing surface fluid design modeling techniques, the establishment of a control the fluid surface design process based on the envelope surface of error, tool motion envelope surface contains process information flow as the impeller blade surfaces Analysis of the characteristics. This method can reduce the impact of the blade surface machining error on the flow field inside the impeller to achieve the unity of the manufacturing process of the flow characteristics of surface design. Path planning and envelopment curved centrifugal impeller internal flow field numerical simulation on the the blade design surface and the tool path, prove This paper presents the design and manufacturing methods based on the the blade curved surface of the envelope surface has a good effect.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Milling and milling machine
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