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Magnetorheological elastomer bulging device and method for non-flared pipeline connection

A magnetorheological elastomer and magnetorheological elasticity technology, applied in the field of magnetorheological elastomer bulging devices, can solve problems such as easy settlement, easy leakage, and poor overall stability, and achieve controllable performance and low energy consumption. Effect

Active Publication Date: 2022-07-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MRE can solve the problems of magnetic particles in MR fluid, such as easy leakage, easy settlement, environmental pollution and poor overall stability

Method used

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  • Magnetorheological elastomer bulging device and method for non-flared pipeline connection
  • Magnetorheological elastomer bulging device and method for non-flared pipeline connection
  • Magnetorheological elastomer bulging device and method for non-flared pipeline connection

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] see Figure 5-Figure 7 , In the embodiment of the present invention, a magnetorheological elastomer bulging device without flaring pipeline connection includes a base 11 and a transmission component arranged at its upper end for transmitting the metal pipe 26 to be expanded. The transmission component It includes two parallel transmission rollers 13, a transmission belt 21 for transmission is wound between the two transmission rollers 13, and an anti-skid layer 20 is distributed on the surface of the transmission belt 21. The fixed shaft end of the transmission roller 13 passes through the support. The legs are connected and fixed to the base 11 , and the fixed shaft end of one of the transmission rollers 13 is connected to the transmission motor 12 for driving the rotation of the transmission roller 13 . The surface of the transmission belt 21 is distributed with a number of buffer fixing grooves 19 arranged at equal intervals. The buffer fixing groove 19 is used to pl...

Embodiment 2

[0043] see Figure 1-Figure 4 , a magnetorheological elastomer bulging method for pipe connection without flare is as follows:

[0044] The first step is to use GH4169 nickel-based superalloy as the metal pipe, and select GH4169 nickel-based superalloy with a wall thickness of 0.8mm and a pipe diameter of Φ16mm for use;

[0045] In the second step, silicon and catalyst were added in a mass ratio of 100:10 and stirred uniformly. After that, add 25% dimethyl silicone oil by mass fraction. After stirring evenly, add carbonyl iron powder with a mass fraction of 50% and stir well. After the above steps are completed, the liquid MR mixture is poured into the mold, placed in a heat transfer section preheated to 70° C. for curing, and a magnetorheological elastic rubber sleeve is made in the form of a hollow cylinder.

[0046] In the third step, AISI 316 stainless steel is used as the bulging die, that is, as the pipe sleeve. Use 1-6 metallographic sandpaper to polish the surface ...

Embodiment 3

[0050] see Figure 1-Figure 4 , a magnetorheological elastomer bulging method for pipe connection without flare of the present invention is as follows:

[0051] The first step is to use 6061 aluminum alloy as the metal pipe, and select 6061 aluminum alloy with a wall thickness of 1mm and a pipe diameter of Φ15mm for use;

[0052] In the second step, silicon and catalyst were added in a mass ratio of 100:10 and stirred uniformly. After that, add 25% dimethyl silicone oil by mass fraction. After stirring evenly, add carbonyl iron powder with a mass fraction of 50% and stir well. After the above steps are completed, the liquid MR mixture is poured into the mold, placed in a heat transfer section preheated to 70° C. for curing, and a magnetorheological elastic rubber sleeve is made in the form of a hollow cylinder.

[0053] The third step is to use YG8 tungsten steel alloy as the bulging die, that is, as the tube sleeve. Use 1-6 metallographic sandpaper to polish the surface o...

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Abstract

The invention discloses a magnetorheological elastomer bulging device and method for non-flared pipeline connection, discloses a magnetorheological elastomer bulging technology for non-flared pipeline connection, and belongs to the technical field of advanced manufacturing of flexible forming components with complex curved surfaces. The metal pipe is machined in an adjustable magnetic field environment, original crystal grains can be maintained on the micro scale, and the comprehensive mechanical performance of the surface of the guide pipe is guaranteed. Different forming effects are achieved by controlling the compressibility of the magnetorheological elastic rubber sleeve through different magnetic field intensities or different magnetic particle concentrations. The mechanical property of the magneto-rheological elastic rubber sleeve is adjusted through different magnetic field loading strengths or different magnetic particle concentrations, and the technical problems that under the condition that a common rubber sleeve is used, the pipe wall is too thin, and the depth of a formed groove is insufficient can be solved within a large range. According to the method, the magnetorheological elastomer bulging technology is of great practical significance to improvement of the forming quality of the non-flaring pipeline connecting process.

Description

technical field [0001] The invention belongs to the technical field of metal shape processing and advanced manufacturing of complex components, in particular to a magnetorheological elastic body bulging device and method without flaring pipeline connection. Background technique [0002] Conduit parts of aircraft systems perform an important function of delivering pressure to each system. During the combat training of the aircraft, due to the vibration, friction and impact of foreign objects, the conduit is prone to cracks, fractures and damages. Once the conduit is damaged, it will cause oil leakage and air leakage at light level, and even cause the loss of aircraft system function, which will seriously endanger flight safety. The results of the aircraft war damage simulation show that the war damage probability of the aircraft duct is about 4.3%. At present, the commonly used materials for aircraft conduits include aluminum alloy, titanium alloy, stainless steel and coppe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/14
CPCB21D26/14
Inventor 程诚吴润华郭训忠陶杰刘春梅刘释轩
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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