Algorithm for correcting top cutter position of three-dimensional impeller variable-axis plunge milling rough machining
A ternary impeller and tool position technology, applied in program control, instrument, electrical program control, etc., can solve the problems of cutting noise, tool vibration intensification, cutting difficulties, etc., to correct the top knife position, solve cutting difficulties, avoid top The effect of the knife phenomenon
Active Publication Date: 2021-08-31
SHANGHAI DIANJI UNIV
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Problems solved by technology
Even if the cutting edge of the tool used passes through the center of the bottom surface of the tool, since the cutting speed of the center of the bottom surface of the flat-bottomed knife is zero, the top knife phenomenon will occur, resulting in difficult cutting and accompanied by increased cutting noise and tool vibration
The top knife phenomenon is extremely harmful, but in the existing literature, there is no way to avoid this phenomenon.
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[0022] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of ...
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The invention discloses an algorithm for correcting a top cutter position of three-dimensional impeller variable-axis plunge milling rough machining. The algorithm comprises steps of S1, a cutter center point in the cutter position of the three-dimensional impeller variable-axis plunge milling rough machining and a profile value point of a corresponding cover disc position being extracted; S2, fitting all the type value points of the plate covering position into an NURBS curve; S3, performing discrete processing on the NURBS curve to obtain a plurality of discrete points; and S4, optimizing the cutter shaft vectors of the cutter positions according to the discrete points so that the included angles between the cutter shaft vectors of the adjacent cutter positions and the normal vector of the surface of the shaft disc at the cutter contact point are gradually increased. According to the method, after the cutter position of the existing centrifugal three-dimensional impeller variable-axis plunge milling rough machining is optimized, the top cutter position can be effectively corrected, a cutter top phenomenon is avoided, the service life of a machine tool and a cutter can be prolonged to a great extent, and problems that cutting is difficult, and cutting noise is large are solved.
Description
technical field [0001] The invention relates to the technical field of numerical control machining tool position algorithms, in particular to an algorithm for correcting the top tool position of a three-dimensional impeller variable axis plunge milling rough machining. Background technique [0002] As an important product in the equipment manufacturing industry, centrifugal compressors are widely used in many fields such as metallurgy, petrochemical industry, natural gas transportation, and air separation. Centrifugal three-way impeller is the core component of centrifugal compressor, and its processing efficiency and manufacturing precision have attracted extensive attention of scholars. 70-80% of the material of the ternary impeller is removed in rough machining, so improving the machining efficiency of the impeller should start with rough machining. With the improvement of the process method, the rough machining method of the ternary impeller has changed from five-axis s...
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IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349
Inventor 董雷王洁
Owner SHANGHAI DIANJI UNIV