Nozzle system and method for removing residual stress in material through high-pressure water jet

An internal residual stress, high-pressure water jet technology, applied in heat treatment equipment, furnaces, heat treatment furnaces, etc., can solve the problems of inability to eliminate residual stress, unfavorable to the processing process, and high manufacturing costs, achieving a wide range of applications and improving processing results. , the effect of improving the service life

Active Publication Date: 2016-04-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods are not only complicated in structure and high in manufacturing cost, but also complicated in operation, which is not conducive to the actual processing process.
At present, the most widely used angle-variable water jet nozzles on the market are

Method used

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  • Nozzle system and method for removing residual stress in material through high-pressure water jet
  • Nozzle system and method for removing residual stress in material through high-pressure water jet
  • Nozzle system and method for removing residual stress in material through high-pressure water jet

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Example Embodiment

[0030] Figure 1~5 It is the best embodiment of the nozzle system of the high-pressure water jet to eliminate the residual stress inside the material. Figure 1~5 The present invention will be further explained.

[0031] Reference figure 1 , The high-pressure water jet nozzle system for eliminating residual stress in the material includes two spray arms 3 arranged in parallel, a plurality of nozzles 4 are arranged on the lower side of each spray arm 3, and the nozzles 4 on the two spray arms 3 are staggered. , The nozzle 4 on one spray arm 3 is inclined to one side of the other spray arm 3, one end of the spray arm 3 is also connected with a mandrel 1 for connecting the water supply pipeline, and the mandrel 1 is rotatably connected with the spray arm 3. After the spray arm 3 and the workpiece are walking, the water jets sprayed from the staggered nozzles 4 on the two spray arms 3 exert alternating tension and compression cyclic loads on the material, which can better relax the ...

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Abstract

The invention discloses a nozzle system and method for removing residual stress in a material through high-pressure water jet, and belongs to the technical field of welding. The nozzle system comprises two parallelly arranged jet arms (3), wherein a plurality of nozzles (4) are arranged on the lower side of each jet arm (3) at intervals; the nozzles (4) on the two jet arms (3) are arranged in a staggered manner; the nozzles (4) on one jet arm (3) are arranged inclined to one side of the other jet arm (3); a core shaft (1) used for connecting a water supply pipeline is connected at one end of each jet arm (3); and the core shafts (1) are rotatably connected with the jet arms (3). When a jet arm workpiece walks, water jet ejected by the staggered nozzles on the two jet arms applies alternating tensile-compressive circle load on the material, so that the residual welding stress in the workpiece can be better loosened, and the pressure of water jet does not need to be alternately changed; and besides, a plurality of nozzles can apply continuous alternating tensile-compressive circle load, so that the reciprocating walking is not needed, and the working efficiency is obviously improved.

Description

technical field [0001] The invention relates to a nozzle system and method for eliminating internal residual stress of materials by high-pressure water jet, belonging to the field of welding technology. Background technique [0002] Metal materials inevitably produce residual stress inside the material during cold and hot processing. Residual stress has a great influence on the fatigue strength, stress corrosion, yield strength and service life of the structure. Residual stress concentration often occurs at welded joints. Aiming at this phenomenon, experts at home and abroad have proposed a variety of methods to control welding residual stress. Among them, applying alternating cyclic load to the weld area can reduce the welding residual stress more effectively. In the past, the method of using high-pressure water jet technology to eliminate welding residual stress is that the water jet acts vertically on the surface of the workpiece, and uses extremely high working pressu...

Claims

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Application Information

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IPC IPC(8): C21D7/06C21D9/50
CPCC21D7/06C21D9/50
Inventor 蒋文春马睿罗云徐书根王振波王炳英金有海
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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