Method and device for on-line monitoring and pre-tightening force application of assembly of sandwich type longitudinal vibration transducer

Abstract

The invention discloses a method and device for on-line monitoring and pre-tightening force application of assembly of a sandwich type longitudinal vibration transducer. A spiral groove with a spiralstructure is formed in a conical transition section of an amplitude transformer. The transducer is composed of four piezoelectric ceramic sheets, four electrode sheets, a rear end cover and connectingbolts. The polarization directions of two adjacent piezoelectric ceramic sheets are opposite and have the same positive and negative characteristics. The electrode sheets are connected in pairs, thepositive electrode sheet is connected with the positive electrode sheet, and the negative electrode sheet is connected with the negative electrode sheet to form two pairs of electrodes which are symmetrically distributed at 180 degrees. The two pairs of electrode sheets are symmetrically and evenly distributed in two wall grooves at the upper end of a die, a flange of the amplitude transformer isconnected with the die through a threaded tabletting under the die, the two pairs of electrode sheets are separately connected with two jointing clamps of an impedance analyzer, a computer is separately connected with the impedance analyzer and a mechanical arm, and a torque wrench is arranged at the outer end of the mechanical arm. According to the method and device for on-line monitoring and pre-tightening force application of the assembly of the sandwich type longitudinal vibration transducer, a closed loop is formed, data are continuously generated, collected, processed and transmitted, sothat various parameters, instructions and actions are continuously optimized, and the target of pressing the transducer is achieved.

Description

Technical field: [0001] The invention relates to a measurement of ultrasonic vibration, in particular to a method and device for on-line monitoring of assembly of a sandwich-type longitudinal vibration transducer and application of pretightening force. Background technique: [0002] With the increasing demand for processing hard and brittle materials, especially nanocomposite ceramics and metal matrix composites, power ultrasonic processing technology has been widely used. Among them, the transducer is the key point in the whole ultrasonic vibration amplifier. Its function is to convert the input electric power into mechanical power (that is, ultrasonic wave) and then transmit it out, so its own processing accuracy is particularly important. When connecting the piezoelectric ceramic sheet and the horn with fastening screws, the pre-tightening force must be strictly calculated. Only with an appropriate pre-tightening force can a qualified and ideal admittance circle diagram, ...

AI Technical Summary

Problems solved by technology

In the prior art, there is no device for monitoring pretightening force, which makes monitoring inconvenient and reduces production efficiency and monitoring accuracy

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