Local residual stress ultrasonic testing and closed-loop control device

Abstract

The invention relates to a local residual stress ultrasonic testing and closed-loop control device which mainly aims at solving the problem that due to the limit of a filed use environment and a filed use condition, when residual stress occurs in mechanical components such as an enlist large-scale metal trusswork, a ship body and a pressure vessel, a state of the residual stress is hard to change through traditional methods such as a tempering method, a loading method and an impact vibration method. A high-energy ultrasonic energy converter is connected with the machinery component through a clamping device. Relatively high-energy focal zones are formed in positions with different depths in an elastic solid component to adjust a residual stress state of the component through the focal energy converter by controlling different encourage parameters such as an incident angle, incident frequency and an incident phase position of a high-energy ultrasound bundle. Meanwhile, a sound-bullet effect is utilized to measure macroscopic residual stress of the component in real-time to form a residual stress closed-loop control system. After regulation and control, strength, anti-fatigue capability and anti-corrosion capability of the machinery component are improved as a whole, and service life is prolonged, safety and reliability of the component are strengthened.

Description

1. Technical field [0001] The invention relates to a device for realizing in-situ elimination, suppression and reconstruction of local residual stress distribution of in-service mechanical components by using high-energy sound field. The device is small in size, easy to operate, light in weight and easy to carry. The achievements of the invention can be widely used in aerospace, shipbuilding, machine tool industry, construction machinery, coal mining machinery, casting, forging, welding, mould, nuclear power, wind power and other fields. 2. Background technology [0002] Residual stress is the stress retained after deformation due to the uneven stress field, strain field, temperature field and tissue inhomogeneity during metal processing. Residual stress has a great influence on the reliability of mechanical components, especially the fatigue life, dimensional stability and corrosion resistance of structural parts, and can lead to stress concentration, which leads to microc...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this equipment is that it is limited by the output power, the size of the material to be processed is limited, and it is difficult to process larger in-service components.

The disadvantage of this device is that the method of mechanical vibration is used to reduce the residual stress, and the treatment effect is not very significant

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