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Method for milling titanium alloy fan blade profiles

A technology for fan blades and titanium alloys is applied in the field of profile milling of titanium alloy fan blades. Efficiency and machining accuracy, reduced skill requirements, reduced burn effects

Active Publication Date: 2016-02-03
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large surface margin results in high labor intensity in the polishing process, it is difficult to guarantee the profile dimension accuracy and waviness of the profile, and the efficiency of manual polishing is low, and the leaf profile is prone to burns and ablation

Method used

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  • Method for milling titanium alloy fan blade profiles
  • Method for milling titanium alloy fan blade profiles
  • Method for milling titanium alloy fan blade profiles

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Embodiment Construction

[0023] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0024] The specific implementation steps of the present invention are as follows:

[0025] Step 1: Use tenon double-degree surface positioning, bottom surface positioning and clamping method, the guiding length of the positioning jacking pin is 30mm, the matching clearance is required to be less than 0.01mm, and the positioning length of the pressing surface is 14.19mm, so the positioning error of the bottom surface = 0.01 *14.19 / 30=0.00473mm, which can meet the clamping requirements, as shown in Figure 1.

[0026] Step 2: After the rough machining of the blade, the margin of the blade body profile is between 1.2 mm and 2 mm, and the semi-finishing process is added to make the margin of the parts even, and the margin of the blade profile after the semi-finishing process is 0.5 mm.

[0027] Step 3: Machining the airfoil profiles with different ...

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Abstract

The invention discloses a method for milling titanium alloy fan blade profiles, which aims to improve precision and milling quality of the titanium alloy fan blade profiles, and comprises steps: 1) parts are clamped by adopting a clamping mode which positions tenon double-degree surfaces and bottom surfaces; and 2) the parts are processed in half precision after being roughly processed, enables the allowances of the parts to be uniform, part blade profiles are finely processed in segments by adopting a ball-end mill after being processed in half precision, are measured on a machine tool on line to guarantee tool setting precision by adopting standard tool setting blocks or digital display setting tools during the process, control closing and tightening force of a processing center hole, and adjust closing and tightening force of machine tool double drivers according to structures and wall thicknesses of blades.

Description

technical field [0001] The invention relates to a method for processing a titanium alloy fan blade, in particular to a method for milling a profile of a titanium alloy fan blade. Background technique [0002] The material of the fan rotor blade is TC4, which is the larger one among the domestically produced blades with damping table. The geometric shape of the blade is complex, the profile is highly twisted, the chord of the blade is wide and long, and the dimensional accuracy is required to be high. The blank is a die forging with a large margin, and the profile margin is between 2mm and 4.5mm. Due to the influence of materials and specifications, it is difficult to obtain an ideal allowance distribution, resulting in fluctuations in cutting force caused by uneven removal of surface allowances, resulting in stress deformation. Under normal circumstances, a margin of 0.2mm to 0.35mm is left on the profile after machining, but due to the influence of deformation in the actu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/18
Inventor 魏萍余杰江波王波雷海峰
Owner AECC AVIATION POWER CO LTD
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