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Complex curved surface component forming device and method on the basis of magnetorheological elastomers

A magneto-rheological elastomer and complex curved surface technology, which is applied to engine components, mechanical equipment, etc., can solve problems such as large-scale accuracy, wall thickness distribution differences, and difficult forming control of complex curved surface components, so as to increase modulus and response Fast, the effect of improving the forming efficiency

Active Publication Date: 2020-08-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a complex curved surface component forming device and method based on magnetorheological elastomers, which can solve the difficulty in forming and controlling complex curved surface components with large diameter reduction ratio and large section change ratio, large differences in wall thickness distribution and dimensional accuracy. low level problem

Method used

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  • Complex curved surface component forming device and method on the basis of magnetorheological elastomers
  • Complex curved surface component forming device and method on the basis of magnetorheological elastomers
  • Complex curved surface component forming device and method on the basis of magnetorheological elastomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] In the first step, the magnetorheological elastomer 4 with the through hole 7 is put into the tube blank 6, the content of magnetic particles at the corner of the magnetorheological elastomer 4 is higher than that at both ends, and the magnetic particles at the right end The content is higher than the left end, so that the deformation of the right end of the pipe is greater than that of the left end. At the same time, due to the large deformation at the corner, local high pressure is required here, and the number of through holes is also large. Put the tube blank 6 into the pipe with figure 1 The complex curved surface mold cavity shown in the figure is closed, and then the whole is placed on the working table of the bulging device, and the pressure head 3 presses the two ends of the magnetorheological elastomer 4 to form a seal;

[0061] The second step is to prefill the liquid through the high-pressure liquid input channel on the pressure head 3 to discharge the air in...

Embodiment 2

[0067] In the first step, the magnetorheological elastomer 4 with the through hole 7 is put into the tube blank 6. The magnetorheological elastomer 4 presents a gradient distribution of magnetic particle content in the axial direction, and the greater the deformation, the greater the magnetic particle content. High, the distance between the radial through-holes (from left to right) gradually decreases during the process of increasing the amount of deformation, put the tube blank 6 into the continuous shrinking mold cavity and close the mold, and then place the whole in the expansion On the working table of the shaped device, the pressure head 3 presses the two ends of the magnetorheological elastomer 4 to form a seal;

[0068] The second step is to discharge the air in the tube through the pre-filling liquid through the hole on the pressure head 3;

[0069] In the third step, the electromagnet is fixed on the bulging device and connected with a high-precision DC excitation pow...

Embodiment 3

[0074] The first step is to put the magnetorheological elastomer 4 with the through hole 7 into the tube blank 6. The magnetorheological elastomer 4 has a higher magnetic particle content at the expansion joint than at the flat section, and a diameter is opened at each expansion joint. There are no radial through holes in the flat section, put the tube blank 6 into the bellows mold cavity and close the mold, and then place the whole on the workbench of the bulging device, and the pressure head 3 presses the magneto-rheological The two ends of the elastic body 4 form a seal;

[0075] The second step is to discharge the air in the tube through the pre-filling liquid through the hole on the pressure head 3;

[0076] In the third step, the electromagnet is fixed on the bulging device and connected with a high-precision DC excitation power supply;

[0077] The fourth step is to turn on the power, so that the magnetic field generated by the pole head 1 area of ​​the magnetic field ...

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Abstract

The invention discloses a complex curved surface component forming device and method on the basis of magnetorheological elastomers. The device comprises magnetic field generation device pole heads, aforming mold, pressure heads, the magnetorheological elastomers, a pipe blank and high-pressure liquid input channels. Through holes are axially and radially formed in the magnetorheological elastomers, the magnetorheological elastomers are arranged inside the pipe blank, the magnetorheological elastomers are attached to the inner wall of the pipe blank (6), the pipe blank is arranged in the forming mold, the two pressure heads are arranged at the two ends of each magnetorheological elastomer in a close pressing manner respectively, the high-pressure liquid input channels are formed in the twopressure heads, and the high-pressure liquid input channels align with and communicate with the radial through holes in the magnetorheological elastomers. The magnetorheological elastomers can be improved in magnetorheological effect because of the high content of magnetic particles, the modulus of the magnetorheological elastomers is increased, the deformation of a pipe is increased, and then the problems that a thin-wall component with a large reducing ratio and big section changes is difficult to control in formation, high in distributional difference of wall thickness, low in dimensionalaccuracy and the like are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of advanced manufacturing of metal complex curved surface components, and in particular relates to a high temperature alloy complex curved surface component forming device and method through the joint action of magnetorheological elastomer and high-pressure liquid. Background technique [0002] High-temperature alloys have high enough heat resistance, good plasticity, high-temperature oxidation and gas corrosion resistance, and long-term structural stability. They are widely used in various high-temperature components such as engine shafts, turbine intake ducts, and nozzles. The overall performance and working stability of aerospace engines are of great significance. However, due to the complex curved surface components of nickel-based superalloys usually have the characteristics of large diameter reduction ratio and large section change ratio, defects such as bursting, wrinkling and uneven wall thickness di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D35/00B21D26/14B21D26/033B21D53/84
CPCB21D26/033B21D26/14B21D35/002B21D53/84
Inventor 郭训忠沈一洲马子奇吴聪
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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