Method and device for equalizing residual stress of a heat flow pulse type ring
A residual stress, pulsed technology, used in heat treatment furnaces, heat treatment equipment, heat treatment process control, etc., can solve problems such as high site and equipment requirements, large parts cannot provide sufficient dynamic stress, and long process cycles, and achieve low equipment costs. , Avoid stress difference, reduce the effect of liquid leakage
Active Publication Date: 2021-06-15
BEIHANG UNIV
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However, the above residual stress homogenization methods all have defects. The thermal aging method has a long process cycle and high requirements on the site and equipment; vibration aging cannot provide sufficient dynamic stress for large parts
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[0021] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0022] Based on the above background, the present invention proposes a heat flow pulse type ring residual stress homogenization method, which heats the hydraulic oil with a certain pressure value to realize heat flow pulse type composite residual stress homogenization, and designs a method suitable for heat flow pulse type The device for homogenizing the residual stress of the ring, specifically includes the mechanical mold system and the hydraulic pressure and control sy...
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The invention proposes a method for homogenizing the residual stress of heat flow pulse type rings, which heats hydraulic oil with a certain pressure value to realize heat flow pulse type compound residual stress homogenization, and designs a method suitable for heat flow pulse type ring residual stress The homogenization device specifically includes the mechanical mold system and the hydraulic and control system. The residual stress homogenization method of heat flow pulse type ring parts, setting the output hydraulic pressure value as a pulse hydraulic pressure with periodic fluctuations, and heating the output hydraulic oil, realizes the multiple load effects of heat flow temperature, hydraulic pressure, and hydraulic pulse pressure on the parts, using External force loading is used to homogenize the residual stress. The heat flow pulse residual stress equalization device for ring parts includes a mechanical mold system and a hydraulic and control system. The main function of the mechanical mold is to realize the clamping and fixing of parts, and the hydraulic and control system performs load output and control. Compared with the prior art, the present invention has obvious advantages: 1) It can realize residual stress homogenization under multiple loads of heat flow temperature, hydraulic pressure and hydraulic pulse force; 3) The hydraulic oil acts on the parts through the temperature-resistant air bag, which reduces the liquid leakage; 4) It can achieve a high degree of automation and accurately control the process parameters; 5) The residual stress homogenization efficiency is high, and the equipment cost Low, avoiding the stress difference at the interface of the mechanical bulging mold.
Description
technical field [0001] The invention relates to a method and device for homogenizing the residual stress of a heat flow pulse type ring, belonging to the field of processing and manufacturing and residual stress control. Background technique [0002] Residual stress is the result of non-uniform elastic deformation or non-uniform elastic-plastic deformation of the material, which is related to the residual elastic strain existing in the local area of the material. Residual stress has a great influence on the strength, fatigue life, stress corrosion resistance and structural dimensional stability of metal workpieces. When an object is subjected to an external force, the acting stress interacts with the residual stress, causing some parts to show plastic deformation, and the internal stress of the section is redistributed; when the external force is removed, the entire object will be deformed due to the internal residual stress tending to balance . Therefore, it is necessar...
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IPC IPC(8): C21D9/40C21D11/00C21D10/00
CPCC21D9/40C21D10/00C21D11/00Y02P10/20
Inventor 吴琼薛念普高瀚君张以都
Owner BEIHANG UNIV