A closed non-ruled surface NC machining tool path planning method
A trajectory planning and non-straight grain technology, which is applied in metal processing, metal processing equipment, metal processing machinery parts, etc., can solve the problems of processing accuracy and processing surface quality, and there is no effective method to achieve good consistency , short production preparation cycle, flexible processing and high processing efficiency
Active Publication Date: 2016-05-11
航天科工哈尔滨风华有限公司
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Problems solved by technology
At present, there is no effective method for planning the toolpath trajectory of closed non-ruled curved surface CNC machining, and the machining accuracy and surface quality are not ideal.
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[0034] Taking a closed impeller part of a certain type of engine as an example, the tool path trajectory planning method proposed by the present invention is used for testing. The diameter of the outer ring of the closed impeller is 81.3mm, the diameter of the hub is 59mm, the height of the impeller is 25mm, and the height of the blades is 10mm. The rake angle and roll angle of the inner arc machining tool path trajectory are 9.8°, and the vector point coordinates are (8.714, 39.004, 0.150), (8.715, 30.829, 0.149), (8.716, 30.829, 0.149), (-1.116, 30.029, 9.609 ); the Zig cutting lead angle is -65°, the side inclination angle is 26°, the Zag cutting lead angle is 65°, and the side inclination angle is -26°; the tool path trajectory of the back arc machining is (-8.284 , 35.155, 26.798); the rotation angle of the tool path trajectory in the middle part of the back arc is 0, and the rake angle and side inclination angle are 60°; the straight line pointed by the tool axis of the ...
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The invention relates to a tool locus planning method for closed curved surface numerical control machining, in particular to a tool locus planning method for closed non-ruled surface numerical control machining. The method solves the problems that no effective method exists to realize closed non-ruled surface numerical control machining tool locus planning at present, and machining accuracy and machining surface quality are not ideal. The method includes the steps that a tool axis interpolation machining strategy is adopted for inner arc machining, a directed straight line is adopted for tool axis machining through an outer ring, and a target point machining strategy is adopted for tool axis machining through a wheel hub; a side edge driving-front lean angle adding machining strategy is adopted for back arc machining, and a double-4-axis machining strategy of the driving body is adopted for middle machining; a three-axis machining strategy is adopted for front edge and tail edge machining. By means of the closed non-ruled surface numerical control machining cutter locus planning method, integrated machining of the closed non-ruled surface can be conducted on a five-axis numerical control machine, the machining accuracy is within IT6, and the method is specially applied to large bath closed non-ruled surface structure.
Description
technical field [0001] The invention relates to a tool path trajectory planning method in closed curved surface numerical control machining, in particular to the tool path trajectory planning in the closed impeller numerical control machining of a turbine engine. Background technique [0002] The closed non-ruled curved surface is a typical structure of the closed impeller, and the closed impeller is the core component of the turbocharged engine, which is widely used in aerospace, aviation, national defense, energy, electric power and other departments. The use of integral numerical control machining breaks through the traditional process constraints of using the impeller and the outer ring to be processed separately and then riveted or welded together, and innovatively proposes integral processing, which avoids welding cracking and welding that exist when they are assembled together after separate processing. False, blade deformation at high temperature and many other probl...
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IPC IPC(8): B23Q15/013B23Q15/007
CPCB23Q15/013
Inventor 刘忠璐刘运凤李选琦荆君涛翟学志魏士亮
Owner 航天科工哈尔滨风华有限公司