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Pre-punching, draining and chip discharging method for electrical discharge machining of enclosed integral blade disc

A technology of integral blisk and electric discharge, applied in the field of electric discharge machining, can solve problems such as unstable discharge state, low processing efficiency of closed integral blisk, and poor discharge of discharge erosion products, so as to improve processing efficiency and achieve highly operable effect

Active Publication Date: 2018-11-23
上海交通大学深圳研究院 +1
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AI Technical Summary

Problems solved by technology

When the closed blisk is processed by the flushing method, the discharge erosion product is not discharged smoothly, resulting in an unstable discharge state, which is one of the main factors for the low processing efficiency of the closed blisk

Method used

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  • Pre-punching, draining and chip discharging method for electrical discharge machining of enclosed integral blade disc
  • Pre-punching, draining and chip discharging method for electrical discharge machining of enclosed integral blade disc
  • Pre-punching, draining and chip discharging method for electrical discharge machining of enclosed integral blade disc

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Embodiment Construction

[0027] Such as figure 1 As shown in , the closed integral blade disk to be processed is rotated around the Z axis, and the rotated blade disk is projected onto the YZ plane, and the Z-axis rotation angle under the condition of the largest flow channel area on the projection surface is selected as the pre-hole angle. In this embodiment, the pre-hole angle is -15°.

[0028] Such as figure 2 As shown, under the condition that the projected area of ​​the runner area is the largest, the diameter of the pre-hole is selected according to the distance between the projected boundaries of the left and right blades and the size range of the copper tube electrode of the high-speed EDM machine tool. In this embodiment, the diameter of the pre-hole is 1.8 mm. According to the distance between the leaf crown and the leaf bottom, the number of pre-holes in this embodiment is 3.

[0029] Such as image 3 As shown, adjust the inclination angle of the jig according to the designed pre-hole ...

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Abstract

A pre-punching, draining and chip discharging method for electrical discharge machining of an enclosed integral blade disc comprises: designing a pre-punching parameter combination according to a geometric model of the enclosed integral blade disc, providing an enclosed integrated blade disc blank with pre-punched holes for drainage, using a multi-shaft linkage electrical discharge machine to perform electrical discharge machining on each passage in the enclosed integrated blade disc blank having the pre-punched holes, and extracting a working liquid with electro-corrosion products, generatedin machining, through the pre-punched holes from the side opposite to a tool electrode during passage machining, so that the working liquid in the discharge machining area is renewed; machining efficiency of the enclosed integral blade disc is evidently improved. The method herein has the advantages that electro-corrosion products from electrical discharge machining of an enclosed integral blade disc can be effectively discharged, and machining efficiency of the enclosed integral blade disc is improved.

Description

technical field [0001] The invention relates to the technical field of electric discharge machining, in particular to a method for discharging discharge erosion products during the electric discharge machining process of a closed integral blisk. Background technique [0002] The closed integral blisk has the advantages of high working efficiency and high reliability, and is more and more widely used in liquid rocket engines and aeroengines. However, the flow channel of the closed blisk is a semi-closed structure, and the blade surface is curved and twisted. In addition, the closed blisk is processed from a blank of a difficult-to-cut material, and its manufacture is very difficult. [0003] At present, both at home and abroad, multi-axis linkage EDM is regarded as the preferred method for closed blisk machining. At this stage, there are relatively mature methods to design the tool electrode of multi-axis linkage EDM and plan its feed trajectory, so as to realize the machina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H1/00B23H9/10B23H1/10
Inventor 康小明赵万生徐海华
Owner 上海交通大学深圳研究院
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