Ultrasonic vibrating aided welding test device

Abstract

The invention discloses an ultrasonic vibrating aided welding test device. The device mainly comprises an ultrasonic vibration processing device, a supporting and adjusting mechanism, a welding platform, etc. According to the device, a welding part in normal welding is subjected to regular ultrasonic vibration processing through a vibrating gun, and a welding pool is vibrated, thus the welding seam metal crystallizing process is changed, and the uniformity of the structure performance of a welding joint can be improved, and as a result, the welding quality is improved; alternative pressure isapplied to the metal in crystallizing in the welding pool by the ultrasonic vibration, thus high impact wave is generated for cutting off the growing crystal grains with sufficient energy, and as a result, the quantity of crystal nucleuses can be increased, the crystal form can be changed, and the condensed welding seam metal crystal grains can be refined; and meanwhile, metal in the welding poolis stirred at high speed, thus gas and impurities can quickly float, and the components are uniform, and as a result, the condensing state of the metal in the welding pool can be improved, and the comprehensive mechanical properties of the welding seam metal can be improved.

Description

technical field [0001] The invention belongs to the technical field of welding equipment and technology, and relates to a test device for suppressing welding hot cracks of materials such as high-strength aluminum alloy, alloy steel, and low-carbon steel, and improving the mechanical properties of its welded joints. Background technique [0002] Hot cracks are the most common defects in welding production. From commonly used low carbon steel, alloy steel to various alloys, hot cracks may occur during welding, especially some high-strength aluminum alloys commonly used in aviation and aerospace fields. Hot tear sensitivity is great. At present, it is difficult to completely eliminate large welding defects such as welding hot cracks, pores, lack of fusion, and incomplete penetration through post-welding treatment, and the existence and development of these defects will affect the performance of the weld metal and become failures. risk of accidents. [0003] The occurrence of ...

AI Technical Summary

Problems solved by technology

Due to the inertia of the up and down movement of the hammer head, the impact time and distance of the piston of the air hammer are not fixed, so it is difficult to accurately control the energy of each hammering. At the same time, the vibration of the hammer head is large, and an additional guide mechanism is required.

Rolling with welding and impact rolling with welding have huge equipment, mainly relying on the bearings of the rolling wheel to bear the rolling pressure. The size of the rolling wheel is large, the accessibility is poor, and it is easy to interfere with the welding torch to cause arcing. At present, the main It is used for tailor welding seam of long straight flat plate, longitudinal seam and circular seam welding of larger cylinder, and has strict requirements on the shape of welded parts, which is difficult to meet the actual production demand

Severe segregation may be caused by chilling with welding, and the transverse shrinkage of the weld will increase

In addition, the cooling medium can also contaminate the weld seam

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