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Long-cantilever large-scale integral blade-disc blade one-step milling method

A technology of integral blisk and long cantilever, which is applied in the direction of milling machine equipment, milling machine equipment details, metal processing equipment, etc., can solve the problems of blade profile out-of-tolerance, secondary clamping error, poor surface quality, etc., and achieve the elimination of secondary Clamping error, elimination of vibration pattern on blade surface, and reduction of tool cost

Active Publication Date: 2015-04-01
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Integral structure blisks are key parts used in international aero-engines. Integral blisk structures are used at all levels of the engine's low-pressure compressor and high-pressure compressor. The five-coordinate numerical control milling method is widely used in the world, but for long cantilever large Blisk processing, the traditional butt milling process has been used in China at present, there is a secondary clamping error, and the processing vibration is large and the surface quality is poor. After butt milling, the tool marks are large, and subsequent manual polishing eliminates surface defects such as tool marks and vibration lines. The technical bottleneck problems such as overcutting of the front, rear edge and adjacent parts of the blade, serious out-of-tolerance of the blade profile and low efficiency of the two milling processes

Method used

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  • Long-cantilever large-scale integral blade-disc blade one-step milling method
  • Long-cantilever large-scale integral blade-disc blade one-step milling method
  • Long-cantilever large-scale integral blade-disc blade one-step milling method

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Embodiment 1

[0036] The following diagrams illustrate all the action processes.

[0037] The technology of the present invention is used for milling a blisk with a diameter of 1200mm and a blade suspension depth of 246mm, and the minimum distance between the blades is 38mm. The specific operation steps are as follows:

[0038] Step 1. Tool selection

[0039] The heat-expanding tool holder is used, and the runout is below 0.005. After the tool is clamped, the overall runout is 0.01mm. According to the accessibility of the groove, the overhang depth of the tool holder is gradually increased in length, and the size specification is the smallest with the blade at different positions. The spacing is reasonably configured to ensure that the tool is at the shortest overhang depth. Three kinds of gradient tool handles are selected. According to the calculation of the accessibility of the blade from the outermost edge of the wheel cover to the hub, the tool handle can be customized with one specifi...

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Abstract

The invention provides a long-cantilever large-scale integral blade-disc blade one-step milling method and belongs to the technical field of aeroengines. The long-cantilever large-scale integral blade-disc blade one-step milling method comprises the following steps of 1, cutter selection, 2, five-axis processing anti-interference calculation, 3, five-axis processing cutter locus design: 1), integral spiral cutter locus design and 2), blade root and channel cutter locus design, and 4, milling. The long-cantilever large-scale integral blade-disc blade one-step milling method adopts an integral spiral milling cutter locus mode, realizes precise milling of blades by one-step clamping, eliminates secondary clamping errors, prevents butt joint milling gear marks and effectively control processing deformation. A gradient cutter handle is used, stretches into a cavity groove and carries out milling so that the overhanging length of the cutter is at most shortened by 4 times than that of the cutter with the same size, processing vibration is effectively controlled, blade surface vibratory lines are eliminated and part surface quality is improved by one grade. Through the long-cantilever large-scale integral blade-disc blade one-step milling method, the non-standard cutter is changed to form a standard cutter so that all milling cutter standardization is realized, milling efficiency is greatly improved and machining efficiency is improved by 33%.

Description

technical field [0001] The invention belongs to the technical field of aero-engines, in particular to a one-time milling method for long-cantilever large-scale integral blisk blades. Background technique [0002] Integral structure blisks are key parts used in international aero-engines. Integral blisk structures are used at all levels of the low-pressure compressor and high-pressure compressor of the engine. The five-coordinate numerical control milling method is widely used in the world, but for long cantilever large Blisk processing, the traditional butt milling process has been used in China at present, there are secondary clamping errors, and the processing vibration is large and the surface quality is poor. After butt milling, the tool marks are large, and subsequent manual polishing eliminates surface defects such as tool marks and vibration lines. The technical bottleneck problems such as overcutting of the front, rear edge and adjacent parts of the blade lead to ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/18
CPCB23C3/18B23C2215/44
Inventor 张莹韩德印杨楠赵明王辛牧
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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