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Method for strengthening process rigidity of thin-wall blade based on non-uniform allowance

A non-uniform blade technology, applied in the field of enhancing the rigidity of thin-walled blades, can solve problems such as deformation, and achieve the effects of solving insufficient rigidity, reducing cutting deformation, and reducing machining errors

Inactive Publication Date: 2013-05-08
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0006] In order to avoid the shortcomings of the existing technology and overcome the deformation problem caused by the insufficient rigidity of the CNC milling of thin-walled parts, the present invention proposes a method for enhancing the process stiffness of thin-walled blades based on non-uniform allowance

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  • Method for strengthening process rigidity of thin-wall blade based on non-uniform allowance

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Embodiment Construction

[0026] This embodiment is a method for enhancing the process rigidity of a thin-walled blade based on a non-uniform margin.

[0027] See figure 1 , figure 2 , image 3 , Figure 4 The method of the present invention for enhancing the process rigidity of thin-walled blades based on non-uniform margins is based on the perspective of adjusting the process rigidity of the blank before the finishing of thin-walled blades, and optimizes the distribution method of the blade finishing allowance according to the method to reduce the thickness Cutting deformation in the finishing process of wall blades reduces machining errors.

[0028] In the milling of thin-walled blades, since the cutting force is mainly determined by factors such as the depth of cut, width of cut, and feed per tooth, under other conditions unchanged, where the finishing allowance is small, the depth of cut is small. The resulting cutting force is also small. If the thin-walled blade finishing allowance distribution i...

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Abstract

The invention discloses a method for strengthening the process rigidity of a thin-wall blade based on non-uniform allowance; from the perspective of adjusting the process rigidity of a blank in ahead of finely processing the thin-wall blade, the milling is carried out according to the method, so that the processing deformation of a thin-wall blade machine can be effectively controlled, and the processing error is reduced; because the deformation of the blade generated under the action of milling force is mainly in the normal direction of the blade, the rigidity of various points of the blade under the milling conditions and the rigidity variation tendency of the whole blade are researched and found out by analyzing the deformation of the various points of the blade under the same cutting force; on the basis, a method for distributing the fine processing allowance of the blade is optimized; and the cutting deformation of the thin-wall blade in the fine processing is reduced. The stability in the cutting process is improved from two aspects comprising the optimization of processing and cutting force and the optimization of the rigidity of work-pieces; and therefore, the deformation problem caused by insufficient numerical control milling and fine-processing rigidity of the thin-wall blade is solved.

Description

Technical field [0001] The invention relates to a method for enhancing the process rigidity of a thin-walled blade based on a non-uniform margin, and belongs to the field of aeroengine blade manufacturing and precision cutting processing. Background technique [0002] The blade is the core part of an aeroengine, and it is also a typical thin-walled part. Its manufacturing level directly affects the aerodynamic performance of the aeroengine. With the continuous development of aerodynamic design technology, structural technology and material technology, aero-engine blades have appeared curved, twisted, thin, swept and light structural characteristics, and at the same time put forward higher requirements for their manufacturing accuracy. [0003] In the actual milling process, due to the combined action of cutting force, cutting heat and metal metallographic tearing, the blade will produce processing deformation, resulting in poor blade accuracy and profile after processing. At prese...

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Application Information

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IPC IPC(8): B23C3/18B23Q15/013
Inventor 刘维伟单晨伟李晓燕陈昊王东方蔡元元
Owner NORTHWESTERN POLYTECHNICAL UNIV
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