Explosion valve tension bolt weakening groove surface ultrasonic impact treatment device and working method thereof

Abstract

The invention discloses an explosion valve tension bolt weakening groove surface ultrasonic impact treatment device and a working method thereof, and belongs to an axis part circumferential groove surface strengthening device and method. According to the explosion valve tension bolt weakening groove surface ultrasonic impact treatment device and the working method thereof, the ultrasonic impact amplitude is adjusted to be 20-30 [mu]m, a tension bolt is driven to rotate by a rotating driving mechanism, and thus the rotating linear velocity of the hyperboloid of an impacted weakening groove is 0.8-1.2 mm/s; and a power supply is turned on, the tension bolt weakening groove is subjected to impact treatment, and the suitable impact strength is 10-15 s/mm by the impact time per unit length. A lot of practice proves that the treated tension bolt weakening groove is smooth and clean in surface and remains unchanged in shape; the surface hardness and residual stress of the bottom surface of the weakening groove in the circumferential direction of the tension bolt are uniform and consistent, so that uniform and consistent surface strengthening of the surface of the weakening groove is achieved; fully-automated operation is achieved, the efficiency is high, and technological repeatability is good; a plastic deformation layer with the thickness greater than 1 mm and difficult to achieve through other strengthening method can be obtained; the clean and environmental protection effects in the processing process are achieved, and workpieces are not polluted; and the technology is simple,parameters are less, and monitoring and adjusting are easy.

Description

technical field [0001] The invention relates to an ultrasonic impact treatment device and a working method for the surface of a tension bolt weakening groove of a blasting valve, and belongs to a device and a method for strengthening the surface of a circumferential groove of a shaft part. Background technique [0002] The blast valve is a valve driven by pyrotechnics. It has the characteristics of quick response and reliable opening. It has a wide range of applications in the fields of aerospace, aviation and national defense, such as aircraft ejection devices, missile launchers, and missile fuel supply systems. In 2010, it was introduced into the design of the advanced passive pressurized water reactor nuclear power plant, and undertook the important mission of preventing the accident from further expanding outside the nuclear island under serious accident conditions and ensuring the safety of the nuclear power plant. [0003] The main components of the blasting valve incl...

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Problems solved by technology

Since the blast valve was introduced into the nuclear power plant for the first time, there are few published documents related to the nuclear

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