A Vibration Shock Extrusion Method for Eliminating Weld Residual Stress and Negative Stress in Weld

A residual stress and impact extrusion technology, applied in the field of vibration impact extrusion, to achieve the effect of improving surface cleanliness, smooth surface, and no increase in production processes

Active Publication Date: 2019-12-03
SHANXI ZHONGTONG HIGH TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In order to solve the above-mentioned various limitations existing in the existing methods for eliminating weld residual stress, the present invention provides a vibration impact extrusion method for eliminating weld residual stress and causing negative stress in the weld

Method used

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  • A Vibration Shock Extrusion Method for Eliminating Weld Residual Stress and Negative Stress in Weld
  • A Vibration Shock Extrusion Method for Eliminating Weld Residual Stress and Negative Stress in Weld
  • A Vibration Shock Extrusion Method for Eliminating Weld Residual Stress and Negative Stress in Weld

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Embodiment

[0024] There are many ways to generate vibration and impact force in the axial direction of the extrusion wheel, such as the hole-type rotating wheel device of the impact electric drill, such as the crank connecting rod device, such as electromagnetic vibration, etc.

[0025] Such as image 3 and Figure 4 As shown in the schematic diagram, it is a structural schematic diagram of a vibration and impact force generating device with an eccentric wheel structure to eliminate the residual stress of the weld, which is used to represent the working principle of the specific vibration and impact extrusion device. The welded pipe is supported by the support shaft 4, The welding seam of the pipe is vertically upward, and the welded pipe is provided with a squeeze wheel 2, and the curved surface and curvature radius of the squeeze wheel 2 and the support shaft 4 are adapted to the radius of the welded pipe; a bearing is arranged along the central axis of the squeeze wheel 2 9. The two ...

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Abstract

The invention belongs to the field of material welding and particularly relates to a vibration, impact and extrusion method for eliminating weld joint residual stress. According to the vibration, impact and extrusion method, a vibration impact source device which generates vibration impact force is arranged over an extrusion wheel which parallelly moves along weld joints; and when the extrusion wheel parallelly moves along the surfaces of the weld joints, the vibration impact force generated by the vibration impact source device and extrusion force of the extrusion wheel jointly act on the weld joints coaxially in the same direction, so that the weld joints are locally compressed and deformed, and the weld joint residual stress is eliminated. Compared with weld joint residual stress eliminating through an original extrusion method, the application range is wider, the post-welding residual stress of the thin plate weld joints, the middle-thick plate weld joints and the high-strength weld joints can be eliminated, eliminating of the weld joint residual stress or generation of negative stress particularly facilitates long-term storage and safe use of welded structural parts without the harmful stress effect, and significant using value is achieved on welding of ships, vehicles, artilleries and ammunition and stable use of various storage and transport containers for nuclear powerfor decades.

Description

technical field [0001] The invention belongs to the field of material welding, and in particular relates to a vibration impact extruding method for eliminating residual stress of weld seam and causing negative stress of weld seam. Background technique [0002] During the welding process of metal materials, due to the instantaneous heating, melting and rapid cooling and crystallization of the material by the welding arc, there is a large post-weld residual stress in the weld. The stress is mainly expressed in the form of stretching in all directions of the weld, which has a great destructive effect on the stability of the welded structure and the mechanical properties of the weld. Therefore, how to reduce and eliminate the post-weld residual stress in the welding of metal materials is a key issue. The purpose that the welding industry has always pursued. [0003] The traditional methods for eliminating weld residual stress and their limitations are as follows: [0004] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D10/00
CPCC21D10/00
Inventor 王保东
Owner SHANXI ZHONGTONG HIGH TECH
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