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Precision milling method based on elliptic parameter equation with variable margin control of blade inlet and outlet

A technology of inlet and exhaust edges and parametric equations, applied in milling machine equipment, manufacturing tools, details of milling machine equipment, etc., can solve problems such as poor accuracy, and achieve the effect of improving machining accuracy

Active Publication Date: 2020-02-14
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] In order to overcome the deficiencies of the poor accuracy of the existing blade inlet and outlet edge processing methods, the present invention provides a precision milling method based on ellipse parameter equations for blade inlet and outlet edge variable margin control

Method used

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  • Precision milling method based on elliptic parameter equation with variable margin control of blade inlet and outlet
  • Precision milling method based on elliptic parameter equation with variable margin control of blade inlet and outlet
  • Precision milling method based on elliptic parameter equation with variable margin control of blade inlet and outlet

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Embodiment Construction

[0041] refer to Figure 1-9 . Take an aero-engine thin-wall guide vane intake and exhaust side as an example, the blade size is: 80mm×27mm×1.5mm, the radius of the intake and exhaust side is 0.2-0.5mm, and the diameter of the tool is 6mm. Firstly, three-dimensional modeling software is used to construct the driving surface of the intake and exhaust edge processing, and the section line lofting method is used to uniformly parameterize it, and then the tool position is planned to calculate the tool trajectory, and the initial processing path, the middle processing path and the end processing path are selected. There are nine points in total including the starting point, the middle point and the end point, and the machining allowance is set, and then the machining allowance of each tool position point under any machining path is determined by using the elliptic parameter equation and the Newton interpolation algorithm, and finally according to the planned machining allowance The...

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Abstract

The invention discloses a blade air inlet-outlet edge variable allowance control precision milling method based on an ellipse parameter equation, and is used for solving a technical problem in a current blade air inlet-outlet edge processing method that precision is poor. A technical scheme comprises the following steps: firstly constructing a blade air inlet-outlet edge three-dimensional model inthree-dimensional modeling software, constructing a new cutter path driving surface on this basis, and performing uniform parameterization on the new cutter path driving surface, determining a processing route on each driving surface, selecting nine points of each starting point, intermediate point and ending point in a starting processing route, an intermediate processing route and an ending processing route, setting processing allowance thereof, and determining the processing allowance of each cutter location point in the arbitrary processing routes by using the ellipse parameter equation and a Newton interpolation algorithm, finally calculating a cutter path according to the determined processing allowance, thereby achieving a purpose of improving processing precision.

Description

technical field [0001] The invention relates to a processing method for blade intake and exhaust edges, in particular to a precision milling method based on an ellipse parameter equation for variable margin control of blade intake and exhaust edges. Background technique [0002] The blade is one of the core components of the aero-engine, and its manufacturing level directly affects the aerodynamic performance of the aero-engine, and the intake and exhaust edges are an important part of the blade. The size and even the normal operation of the whole machine have a decisive influence. Since the aero-engine blade is a typical thin-walled part with complex curved surface, it has the characteristics of complex shape, large size span, harsh force, and high load-bearing strength. thin-walled structure. At present, the high-efficiency, high-precision, high-consistency and low-cost processing methods for the blade inlet and exhaust edges are still a bottleneck technical problem in m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23C3/12
CPCB23C3/12
Inventor 单晨伟胡创国张胜男蔺小军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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