Deep hole ultrasonic vibration impact strengthening device and method

Abstract

The invention discloses a deep hole inner surface ultrasonic vibration impact strengthening device and method, and relates to the technical field of deep hole inner surface strengthening treatment devices. The deep hole inner surface ultrasonic vibration impact strengthening device is characterized in that a high-frequency signal generated by an ultrasonic power source is converted by an ultrasonic flexural vibration transducer into flexural mechanical vibration, and an amplitude-change pole after amplifying the vibration amplitude of the high-frequency mechanical vibration at an outlet end ofthe transducer transmits the high-frequency mechanical vibration to an ultrasonic impact head so as to impact inner hole surface of parts. A rotation assist system provides radial rotation for the flexural vibration transducer to achieve higher coverage with a single treatment. The deep hole inner surface ultrasonic vibration impact strengthening device is suitable for strengthening the parts with deep holes and has the advantages of low energy consumption, small size, no pollution in the working field environment and good strengthening effect on the workpiece surface; and the strengthening direction does not need to be limited in the vertical direction, and impact at multiple angles and positions can be achieved; and filling and shot blasting do not need to be repeated during working, and certain practicability is achieved.

Description

technical field [0001] The invention relates to the technical field of deep hole inner surface strengthening treatment devices, in particular to a deep hole ultrasonic vibration impact strengthening method and equipment. Background technique [0002] With the rapid development of the manufacturing industry, some parts and equipment are often used under harsh conditions such as high temperature, high pressure, and high speed, such as aircraft blades, steam turbine rotors, automotive upper gears, crankshafts, connecting rods, etc. These parts are subjected to alternating stress conditions The problem of fatigue failure is becoming increasingly prominent, and the connection holes in equipment components often become the key parts of fatigue failure. Large stress concentration at the edge of the hole and a large number of potential cracks are the main causes of component fatigue damage. Statistics on the fatigue failure of aircraft components in the past show that 70% of the fa...

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Problems solved by technology

However, when this method strengthens the surface of the inner hole, the shot peening direction is limited to the vertical direction; the ultrasonic vibrating head drives the shot peening in the vertical direction, and most of the shot particles move upward in the direction perpendicular to the vibrating head, facing deep hole parts. When strengthening, it cannot effectively hit the surface of the inner hole, and its strengthening efficiency is low, and the effect is not good

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