Method for preparing overall semal accurately formed by additive manufacturing and electrolytic machining

An integral blisk and additive manufacturing technology, applied in additive processing and other directions, can solve the problems of poor material processing performance, large amount of waste removal, and long production cycle.

Active Publication Date: 2019-12-06
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all or part of these existing processing methods face many problems such as poor material pro

Method used

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  • Method for preparing overall semal accurately formed by additive manufacturing and electrolytic machining
  • Method for preparing overall semal accurately formed by additive manufacturing and electrolytic machining
  • Method for preparing overall semal accurately formed by additive manufacturing and electrolytic machining

Examples

Experimental program
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Example Embodiment

[0043] See figure 1 The present invention discloses a method for preparing an integrated blisk accurately shaped by additive manufacturing and electrochemical machining; the target-shaped integrated blisk includes a disk hub 1 and a blade 2. The disk hub 1 has an annular structure, and the disk hub 1 includes Concentric inner ring surface 1-1 and outer ring surface 1-2, inner ring surface 1-1 is in outer ring surface 1-2, inner ring surface 1-1 is parallel to outer ring surface 1-2, inner ring surface The width of 1-1 is smaller than the width of the outer ring surface 1-2, the center planes of the inner ring surface 1-1 and the outer ring surface 1-2 in the width direction are the same plane; the two outer sides of the inner ring surface 1-1 The two outer edges of the outer ring surface 1-2 are connected by an inclined surface 1-3 respectively. The outer ring surface 1-2 is fixedly provided with grooves 3 along its circumference. The distance between adjacent grooves 3 Equally...

Example Embodiment

[0061] Example 1

[0062] Prepare TC4 titanium alloy blisk as follows:

[0063] (1) Clamp the prepared forged TC4 titanium alloy disc hub 1 on the processing table of a CNC electrochemical machining machine. The cathode tool and the axis of the disc hub 1 are at a certain angle on the vertical plane. After positioning to the machining origin, pass the electrolyte , The cathode tool starts to process the groove 3 with radial feed, the depth of the groove 3 is 3mm, the depth of the groove 3 is 2% of the final blade 2 length, and the length and width are consistent with the blade blank 4 processed later. After completing a unit operation, the operation is repeated sequentially along the circumferential direction until all grooves 3 with the same design number as the blisk blade 2 are finally processed, and the preliminary processed disk hub 1 is obtained.

[0064] The electrochemical processing parameters of groove 3 are: electrolyte is 15wt.% NaCl solution, electrolyte temperature is ...

Example Embodiment

[0074] Example 2

[0075] Prepare Ti60 titanium alloy blisk as follows:

[0076] (1) Clamp the prepared forged Ti60 titanium alloy disc hub 1 on the processing table of a CNC electrochemical machining machine. The cathode tool and the axis of the disc hub 1 are at a certain angle on the vertical plane. After positioning to the machining origin, pass the electrolyte , The cathode tool starts to process the groove 3 with radial feed, the depth of the groove 3 is 3mm, the depth of the groove 3 is 3% of the final blade 2 length, and the length and width are the same as the blade blank 4 processed later. After completing a unit operation, the operation is repeated sequentially along the circumferential direction until all grooves 3 with the same design number as the blisk blade 2 are finally processed, and a preliminary processed disk hub 1 is obtained.

[0077] The electrochemical machining parameters of groove 3 are:

[0078] The electrolyte is a 10wt.% NaCl solution, the electrolyte te...

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Abstract

The invention discloses a method for preparing an overall semal accurately formed by additive manufacturing and electrolytic machining. The method combines an electrolytic machining method with a laser additive manufacturing method, at first, grooves are formed in a hub through electrolytic machining, then blade blanks are fabricated on the hub with the grooves by the laser additive manufacturingmethod, the blade blanks are finally machined by the electrolytic machining method, and thus the overall semal can reach design accuracy; and blade additive deposition begins at the grooves, stress concentration at the joint of the hub and blades can be effectively avoided, the overall use performance of components is improved, and the service life of the components is prolonged. The method not only can give full play to the advantages of high utilization rate and free forming of additive manufacturing materials, but also overcome the contradiction between the deposition efficiency and workpiece accuracy of the additive manufacturing materials, enables the dimensional accuracy and surface quality of workpieces to reach high standards, finally reduces manufacturing procedures, greatly shortens the processing cycle of the overall components and reduces the production cost.

Description

【Technical field】 [0001] The invention belongs to the technical field of combined processing of adding and subtracting materials, and in particular relates to a preparation method of an integral blisk formed precisely by adding materials and electrolytic processing. 【Background technique】 [0002] The blisk has gradually become the core component of the new generation of aero-engine, and its production and processing technology marks the development level of the entire aviation manufacturing industry and even national defense technology. The integral blisk is designed and processed with the hub and the blades as a whole, which saves unnecessary connection and support components, and avoids the later assembly process and problems caused by improper assembly, which makes the entire blisk heavy. The range is reduced, the work efficiency and safety reliability are improved, and the service life is also significantly increased. [0003] The overall blisk has many unmatched advan...

Claims

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Application Information

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IPC IPC(8): B23P15/00B33Y10/00
CPCB23P15/00B33Y10/00
Inventor 林鑫李加强刘建睿张少立黄卫东
Owner NORTHWESTERN POLYTECHNICAL UNIV
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