Use of Pro/ENGINEER to Rapid Development of Axial Fan Blades

• Main Authors: Chih-Hsiang Fang, 方志翔
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/nzta97

碩士 === 國立臺灣科技大學 === 機械工程系 === 95 === In traditional procedure of fan-blade design, the geometry of the fan blade changes through numerous performance testing of prototypes. The time span from each single change of fan-blade geometry to prototype making is long since the machining of each prototype starts from the scratch. To achieve the goal of fast development of fan blade, this thesis uses the technique of parametric design to design the geometric models for three different series of axial fan blades. Through the modification of design parameters, the geometry of the fan blade can be changed accordingly in short time. In addition, the cutter path of NC programs to product the product’s prototype, and the mold cavities can be produced at the same time. Pro/Toolkit is firstly employed to design an interface for a design engineer to input the relevant design parameters of fan blades, including blade-section parameters, setting angle, twist angle, various thicknesses, various radii and number of blades. Once design parameters are given, 3D geometric model of the fan blade can be immediately created. Design constraints are also taken into consideration to avoid improper indication of design parameters. Then four-axis NC cutter paths, based on mill-turn machining pattern to overcome the problem of overlapping area of fan blades, are automatically generated to facilitate the making of prototypes for subsequent fan-testing tasks. The benefits that a design engineer receives from the developed system are fast prototype-making through simple indication of design-parameter change, which implies that product performance testing can be undertaken right after design-parameter change. Through iterative procedure of parameter change, fast prototyping, and product testing, a good design of fan blades can be realized. The final design can then be used as input into the developed system to drive the mechanism of creating mold cavities for mass production. As a whole, the system proposed and developed in this research can effectively integrate fan-blade design, prototype machining, and mold-cavity design to achieve rapid development of fan blades.