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Blisk five-axis channel combined milling method

A kind of blisk and milling processing technology, which is applied in the direction of metal processing equipment, manufacturing tools, milling machine equipment, etc., can solve the problems of machining accuracy, easy deformation, complex structure, etc. The effect of efficiency, uniform distribution of margin, and huge economic benefits

Active Publication Date: 2022-07-05
西安三航动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex structure of the overall blisk blade, high processing accuracy requirements, and the blade surface is a free-form surface in space, deformation, chatter lines, and joint tool marks are prone to occur during processing, so that the processing accuracy cannot reach the design. Requirements, at the same time, in view of the multiple clamping errors caused by the rough machining and finishing of the overall blisk and the separate milling, the deformation of the rough machining of the blade will lead to uneven distribution of the surface allowance during finishing machining, and it is easy to appear tool marks so that the machining accuracy cannot be achieved. to design requirements

Method used

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  • Blisk five-axis channel combined milling method
  • Blisk five-axis channel combined milling method
  • Blisk five-axis channel combined milling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: as Figure 1-5 As shown, a method for compound milling of an integral blisk five-axis channel includes the following steps:

[0028] 1) as figure 1 The division of the to-be-processed area of ​​the blisk channel as shown in Fig. 1 is to establish a five-axis machining area of ​​the blisk channel. The area enclosed by the offset surface 5, the offset surface 4 of the inner hub surface 2 of the integral blisk, and the blade tip turning surface 3, wherein the offset distance of the offset surface is the machining allowance;

[0029] 2) Planning of the rough machining tool path of the blisk channel: the first 10-15% of the overall blisk channel in the depth direction from the blade tip turning surface 3 to the inner hub surface offset surface 4 is the first section In the rough milling and slotting milling interval, the milling toolpath is the first roughing toolpath trajectory 7; the latter 85-90% of the depth direction of the blisk channel is the second rough...

Embodiment 2

[0036] Embodiment 2 is identical with embodiment 1, and the difference is that it also includes step 5:

[0037] Step 5) Planning of the actual machining sequence of the blisk channel: take the first rough machining tool path 7 as the first machining program of the blisk, and execute it in all channels; The toolpath trajectory 8 is used as the second processing program of the blisk, and only the first channel of the blisk is executed; The second channel of the disc starts to execute, and the cycle goes to the last channel; the finishing toolpath path 9 is taken as the fourth machining program of the blisk, and the last remaining blade is machined separately. Using the tool path processing provided by the present invention, combined with the sequence provided in Embodiment 2, can improve the rigidity of the blade of the blisk during milling, and can make the machining accuracy of the blisk to meet the design requirements. A key technology in the milling process.

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Abstract

The invention discloses a combined milling method for a five-axis channel of a blisk. The combined milling method comprises the steps of dividing a to-be-machined area of the blisk channel, planning a rough machining tool path track, planning a finish machining tool path track and combining the rough machining tool path track and the finish machining tool path track. According to the method, milling of rough machining and finish machining can be completed under the condition that the blisk is clamped on a five-axis numerical control machine tool at a time, errors caused by repeated clamping are effectively reduced, the rigidity of blades during finish machining is greatly improved, the rough machining allowance of the blisk is evenly distributed, the finish machining molded surface is smoother, and the machining efficiency is improved. The machining quality and the machining efficiency of the blisk are improved, and the method can also be applied to the machining process of similar parts such as impellers.

Description

technical field [0001] The invention relates to the field of numerical control milling processing and manufacturing, in particular to a processing method for a five-axis channel compound milling of an integral blisk. Background technique [0002] The open blisk is a key component of various aero-engines. With the improvement of engine performance requirements, the shape of the blisk becomes more complex. The materials are mostly made of difficult-to-machine materials such as titanium alloys and high-temperature alloys. Poor rigidity, easy deformation, large cutting allowance and other process characteristics, if precision casting or forging are used, the process is very difficult or even impossible, and it is difficult to meet the strict requirements of high-performance aero-engines on the forming accuracy and quality of parts. Therefore, advanced CNC precision machining technology must be adopted to achieve higher machining efficiency and higher surface machining quality. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/00
CPCB23C3/00Y02T50/60Y02P70/10
Inventor 许迎颖冯谦文学谦吕锡明毛海江
Owner 西安三航动力科技有限公司
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