Ultrasonic reinforcement online monitoring adjustment method and device as well as ultrasonic reinforcement device

Abstract

The invention provides an ultrasonic reinforcement online monitoring adjustment method and device as well as an ultrasonic reinforcement device. The method comprises the steps of measuring a voltage and a current at two ends of an ultrasonic transducer in a working process in real time, and performing calculation according to the voltage and the current to obtain instantaneous load impedance in the working process; comparing the instantaneous load impedance with a pre-stored standard load impedance threshold, and obtaining an output control signal according to a comparison result; and according to the output control signal, controlling and adjusting the size of a processing gap between the ball end of an ultrasonic tool and a reinforced workpiece. According to embodiments of the invention, the defects of low adjusting efficiency, incapability of realizing fine control and poor reinforcement treatment effect in the prior art of adjusting the size of a processing gap between the ball end of an ultrasonic tool and a reinforced workpiece by virtue of experience of operators or by arranging a ruler are overcome.

Description

technical field [0001] The invention relates to the technical field of surface strengthening of mechanical parts, in particular to an ultrasonic strengthening online monitoring and adjustment method, device and ultrasonic strengthening device. Background technique [0002] At present, corrosion, wear, and fracture are the three common modes that lead to damage and failure of mechanical parts, among which fracture failure brings the greatest disaster and loss; some important parts in automobiles, locomotives, aircraft, steam turbines and other machinery, such as Springs, shafts, gears, connecting rods, blades, wheels, etc. are subjected to cyclic alternating loads, and sometimes fracture failures occur, and fatigue fractures account for the highest proportion of fracture failures, accounting for about 40%-50% of damage to civil machine parts The proportion of damage to military and aviation aircraft parts is as high as 90%. It can be seen that it is very important to study th...

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Problems solved by technology

[0006] The surface deformation strengthening processes of the above traditional materials have achieved important applications in related fields and occasions, but there are limitations for the surface of certain parts and specific strengthening index requirements.

It is mainly reflected in the fact that it is difficult to perform in modern high-efficiency micro-precision parts, especially in the application of surface strengthening of typical micro-holes, deep and narrow grooves, etc., and the randomness and uncontrollability of the impact of shot peening projectiles make the strengthening effect difficult to be reliable. Guarantee and pre-control

[0007] In order to solve the above-mentioned defects, an ultrasonic strengthening treatment method has also appeared in the prior art. During the working process of ultrasonic strengthening treatment, it is often necessary to control the processing gap between the end of the ultrasonic tool and the workpiece to be strengthened. Strengthen the state and process of the work, but it is very difficult to directly measure the machining gap between the end of the ultrasonic tool and the workpiece during the working process. In the prior art, it is often adjusted manually by relying on the experience of the operator or by setting a scale. Inefficient and unable to achieve fine control, which leads to poor effect of intensive processing

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