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A Welding Process for Improving the Fatigue Performance of Metal Yield Dampers

A yield type damper, fatigue performance technology, applied in the direction of metal processing equipment, welding equipment, welding accessories, etc., can solve the problems of easy hardening structure, large grain size of structure, and the same quality of damper weld seam, etc., to improve Anti-fatigue performance, reducing stress concentration, and avoiding the effects of fluctuations

Active Publication Date: 2022-03-11
YUNNAN QUAKESAFE SEISMIC ISOLATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, manual gas shielded welding is mainly used in the welding production of metal yield dampers, and automatic welding of robots is rarely involved. Because the level of each welding operator is different, it is difficult to guarantee the weld quality of each damper The same, and the grain size of the structure in the weld is large, it is easy to harden the structure, it is difficult to ensure that the fatigue life of each metal damper can meet the design requirements

Method used

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  • A Welding Process for Improving the Fatigue Performance of Metal Yield Dampers
  • A Welding Process for Improving the Fatigue Performance of Metal Yield Dampers
  • A Welding Process for Improving the Fatigue Performance of Metal Yield Dampers

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Embodiment 2

[0040] The difference from Example 1 is that in the step S2) of root welding, the process adopts pulse symmetrical welding, the wire feeding speed is 5 m / min, and the welding speed is 0.35 m / min.

[0041]When the residence time at the end of the weld seam and the air supply time at the end of the weld seam are 0.8s, and the filling metal at the end of the weld seam is moderate, the problem of arc crater cracks can be solved and the welding strength can be improved. During bottom welding, gas shielded welding and pulse welding at the same time, after welding, due to the convection and heat dissipation of the surrounding air and the conduction and heat dissipation of the welded steel plate itself, the welding zone can produce a similar quenching effect and reduce the microstructure grains in the weld size, avoid hardened tissue. The invention ensures the penetration of the T-shaped weld seam of the metal yield damper by controlling the wire feeding speed, welding speed and the r...

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Abstract

The present invention relates to MIG welding and CO 2 The invention relates to the welding technical field of gas-shielded arc welding, in particular to a welding process for improving the fatigue performance of a metal yield damper. The welding process includes: preparation before welding, preparing corresponding V-shaped grooves according to the thickness of the steel plate, the groove angle is 45°, and smoothing the edge and inner side of the groove; bottom welding: spot welding each part with gas shielded welding Assembling, the prefabricated butt joint gap of the weld seam is 2mm, and then the weld seam gap is penetrated; the process adopts gas shielded welding at the same time, and pulse welding at the same time; fillet joint robot welding: weld the flange plate and the connecting plate, and the energy dissipation plate and the wing Flange plate welding, connection plate and energy dissipation plate welding, flange plate and rib plate welding and energy dissipation plate and rib plate welding. The invention uses a robot to weld the damper to reduce the grain size of the structure in the welding seam, avoid the hardened structure, improve the anti-fatigue performance of the damper, ensure the quality of the welding seam, and greatly improve the production efficiency.

Description

technical field [0001] The invention relates to the welding technical field of argon arc welding and CO2 gas shielded arc welding, in particular to a welding process for improving the fatigue performance of a metal yield damper. Background technique [0002] Because the metal yield damper can improve the seismic resistance of the structure, the design of the metal yield damper in the seismic structure is very important. Metal yield dampers rely on the inelastic plastic deformation of metal materials (such as low yield point steel, structural steel, or alloys) to dissipate energy in earthquakes. The metal yield damper has a simple structure, is convenient to manufacture, has a strong non-elastic plastic deformation energy dissipation capability, and has a low manufacturing cost. At present, manual gas shielded welding is mainly used in the welding production of metal yield dampers, and automatic welding of robots is rarely involved. Because the level of each welding operator...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/00B23K9/09B23K9/133B23K9/16B23K9/235B23K9/32
CPCB23K9/0026B23K9/16B23K9/32B23K9/235B23K9/133B23K9/09
Inventor 管庆松张远喜周建龙袁维娜宁浩廖云昆吕崧李飞潘文徐赵东
Owner YUNNAN QUAKESAFE SEISMIC ISOLATION TECH
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