Welding deformation control method based on high-energy ultrasonic treatment

Abstract

The invention specifically relates to a welding deformation control method based on high-energy ultrasonic treatment. The welding deformation control method based on the high-energy ultrasonic treatment comprises the following steps that (1) an ultrasonic transducer is arranged at a appropriate position of a workpiece to be welded; (2) the ultrasonic transducer and an ultrasonic power supply are connected; (3) ultrasonic processing parameters are set; (4) the workpiece is welded; and (5) ultrasonic processing is conducted, specifically, a joint is still in a high temperature state after weldedmetal solidified, the ultrasonic power supply is started to drive the ultrasonic transducer, and ultrasonic energy is injected into the workpiece welded joint and a heat affected zone, and work is stopped until set processing time. According to the welding deformation control method based on high-energy ultrasonic treatment, the existing welding technology and process of the product is not changed, the equipment is simple, the technology is concise, the welding deformation can be effectively controlled by adjusting three parameters of an ultrasonic frequency, power and processing time, and meanwhile stress concentration can be eliminated and even stress distribution is lowered.

Description

technical field [0001] The present invention relates to a method for controlling welding deformation, in particular to a method for controlling, reducing or even eliminating welding deformation by applying high-energy ultrasound to a welded joint and its surrounding areas that are still in a high-temperature state after the weld metal has solidified during the welding process. It belongs to the field of welding technology. Background technique [0002] Welding is a localized and uneven heating and cooling process, which inevitably leads to welding deformation after welding. Especially for high-strength thin-walled structural parts, the higher the material strength and the thinner the thickness, the greater the welding residual stress and the more serious the deformation. In actual production, welding deformation reduces the accuracy of product shape, position and size, and even changes the shape of the weldment, which becomes the main factor affecting product quality, and e...

AI Technical Summary

Problems solved by technology

Compared with the above conditions to be met by the welding deformation control method in actual production, after the product has achieved finalized production, its welding production process, equipment and process have passed the evaluation and fixed, and it is necessary to control it by changing the welding method before welding and during the welding process. The changing situation of welding will inevitably greatly adjust and change the welding process, tooling equipment and process flow, which is expensive and impractical

For the post-welding shape correction method, in order to achieve a better shape correction effect, the heat treatment method must be heated to a certain temperature and kept for a period of time. For heat treatment strengthened materials, the heating temperature generally needs to exceed the aging temperature of the material, which will reduce the material performance. Moreover, the process is complicated, and improper control will easily lead to new deformations and affect product quality. It is not suitable for the shape correction of thin-walled welded structures; mechanical shape correction methods such as impact and hammering are carried out at room temperature. For materials with high strength, it is simple. The effect of the shape correction treatment is poor. If a large-scale hammering or impact is used, it will easily cause damage to the thin-walled components, and even produce microcracks on the surface; It is difficult to apply in production; vibration aging is suitable for the overall shape correction of large components, but it is not applicable to the local welding deformation of the flange structure, that is, it is impossible to carry out selective and targeted treatment of the local welding structure, and the flexibility is not good.

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