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Impeller parts is representative and other typical channel complex parts, which are widely used in energy and power, aerospace, petrochemical, metallurgy and other industries, such as the integral impeller, aircraft engine on tank engine booster fan, water pump and compressor impeller. The design of this kind of parts involves aerodynamics, fluid mechanics and other disciplines, machining means, machining precision and surface quality has great influence on its performance parameters. Integral impeller production of conventional method after casting light repair, but with the development of design theory, integral impeller parts work surface shape is more complex, the mold manufacturing difficulty is relatively large, complex process, high cost, difficult to ensure the accuracy of the blade, and the blade of poor surface finish, easily lead to stress concentrated, resulting in cavitation, the dynamic balance of the impeller performance is poor.
Five coordinate numerical control technology is the biggest difficulty in NC technology, the most widely used technique. High efficiency, precision, automation in the process of machining complex curved surface, five axis machining with three axis machining is the incomparable advantage. Is mainly reflected in the following aspects:
1) five coordinate machining can effectively avoid tool interference, complex parts processing of three axis machine tools to processing;
2) for ruled surface machining, five axis machining can adopt side milling way knife molding, machining quality and high efficiency;
3) five coordinate machining can be realized in one clamping, multi processing process, to ensure product accuracy;
4) five coordinate machining tool relative to the workpiece has good cutting state;
5) for processing space by channel processing and composite surface transition region processing constraints, five axis machining can choose the larger size to avoid interference processing tool, tool rigidity.
Therefore, five axis machining technology has been one of the research hotspots in the field of CNC machining of the scholars at home and abroad. Also, it has been the western countries on China's technical blockade. Because many advanced weapons manufacturing, such as key parts of aircraft, missiles, tanks, processing all cannot do without high performance CNC machine tool. Five coordinate programming technology is one of the key problems of five coordinate machining technology. Do a simple overview of all aspects of the impeller of the 3D modeling and NC programming technology.
Key words: integral impeller;Five coordinates;The nc machining process;Knife road track;NC
目 录
摘 要 I
Abstract II
第一章 论绪 2
1.1选题的依据及意义 2
1.2国内外研究概况及发展趋势 2
1.3研究内容及实验方案 2
1.4论文主要内容 3
第二章 整体叶轮三文造型设计 4
2.1新建文件 4
2.2创建文本数据文件 4
2.3绘制样条曲线 4
2.4创建主叶片曲面 5
2.5创建分流叶片曲面 6
2.6创建轮毂回转特征 8
2.7移动复制对象 9
2.8边倒圆 10
2.9绘制中心通孔 10
第三章 整体叶轮数控加工工艺基础 12
3.1零件毛坯分析 12
3.1.1零件毛坯材料分析 12
3.1.2零件毛坯种类分析 12
3.1.3毛坯的铸造方法 13
3.2工艺设计 13
3.3零结构工艺分析 14
3.4装夹方案分析 14
3.5 机床的选择 15
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