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Precise milling processing method with variable inter-row allowance for thin walled blade of difficult-to-process material

A technology of difficult-to-machine blades, which is applied in the field of precision milling of thin-walled blades with variable margins between rows of difficult-to-machine materials. The effect of surface profile

Active Publication Date: 2013-01-16
西安三航动力科技有限公司
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AI Technical Summary

Problems solved by technology

In order to solve the problems of large processing deformation and difficult to guarantee precision in the processing of thin-walled blades in the prior art, the present invention proposes a precision milling method for thin-walled blades of difficult-to-machine materials with variable allowance between rows

Method used

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  • Precise milling processing method with variable inter-row allowance for thin walled blade of difficult-to-process material
  • Precise milling processing method with variable inter-row allowance for thin walled blade of difficult-to-process material
  • Precise milling processing method with variable inter-row allowance for thin walled blade of difficult-to-process material

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Embodiment Construction

[0029] Describe the present invention below in conjunction with specific embodiment:

[0030] This embodiment takes figure 2 Take the thin-walled blade of an aeroengine as an example, figure 2 The size of the blade shown is about: 72mm×26mm×1.5mm, and the diameter of the cutter is 6mm. The concrete implementation process of the present invention is as figure 1 shown.

[0031] The blade is processed by a four-axis CNC machining center. The axial direction of the blade coincides with the X-axis of the machine tool and can rotate 360° around the X-axis. The specific steps of implementation are as follows:

[0032] Step 1: According to the blade design data given by the design department, construct the 3D model of the blade in the 3D modeling software; Auxiliary surface.

[0033] Step 2: In the 3D model of the blade, both ends of the blade are offset towards the blade body. The offset distance ensures that the tool does not interfere with the blade end surface during machi...

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Abstract

The invention provides a precise milling processing method with a variable inter-row allowance for thin walled blades of difficult-to-process materials; four driving curved surfaces are obtained by cutting a blade root boundary surface and a blade tip boundary surface into a blade back curved surface and a blade basin curved surface; parameter lines with equal u on the driving curved surfaces are used as processing paths; a cutting row allowance for each processing path is set respectively; and finally processing on the four driving curved surfaces are completed circularly. The invention facilitates the improvement of the blade cross section position accuracy, facilitates the improvement of the blade surface profile tolerance, and facilitates the reduction of the blade torsional deformation; when compared with traditional vertical cutting with a constant allowance and spiral milling methods, the invention can solve the technical problems of large torsional deformation, poor profile precision, difficultly-controlled cross section position accuracy error, and the like, and can realize the high-efficient precise numerical control processing of thin walled blades of difficult-to-process materials.

Description

technical field [0001] The invention belongs to the technical field of precision and ultra-precision milling, and specifically relates to a precision milling method for thin-walled blades of difficult-to-machine materials with variable allowance between rows, which mainly solves the problem of deformation control of numerically controlled milling finishing of thin-walled blades of aeroengines. Background technique [0002] The blade is the core part of the aero-engine, and it is also a typical thin-walled part. Its manufacturing level directly affects the aerodynamic performance of the aero-engine. With the continuous development of aerodynamic design technology, structure technology and material technology, aeroengine blades have new structural features such as bending, twisting, thinning, sweeping, and lightness, and at the same time, higher requirements are put forward for their manufacturing precision. The high-quality precision machining technology of aero-engine blades...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/00G06F17/50
Inventor 单晨伟刘维伟蔺小军田荣鑫任军学史耀耀王增强汪文虎
Owner 西安三航动力科技有限公司
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