SU874229A1 - Device for ultrasonic working of parts - Google Patents

Description

The invention relates to the ultrasonic treatment of parts, mainly to the ultrasonic cleaning of precision thin-walled pipes, and can find application in various areas of mechanical engineering and chemical industry. A device for ultrasonic processing of parts is known, comprising an ultrasonic transducer with a longitudinal oscillation transformer, a spinneret and waveguides made of materials with different propagation speeds of longitudinal ultrasonic waves, installed concentrically one with respect to the buckle and longitudinal oscillation axis of the transformer and rigidly connected at one end to the output the end face of the longitudinal oscillation transformer, and the drugim with the spinneret, which is located at a distance equal to an even number of half waves for each From the rods and the odd number of half-waves of the second from the output end of the transformer of longitudinal vibrations 1 By means of the known device, it is practically impossible to obtain resonant excitation of the product, since the points of application of anti-intermediate displacement forces are located at a strictly defined distance and cannot be a multiple of half the length of the longitudinal, longitudinal wave in the workpiece material. In addition, the longitudinal excitation of the part during liquid cleaning is ineffective, since the transverse oscillations transformed from longitudinal according to Hooke's law and directed into a liquid, make up about 0, 3 of the longitudinal one. The aim of the invention is to intensify the treatment. This goal is achieved by driving a part on an axisymmetric mode of flexural vibrations, for which the known device for ultrasonic processing of parts, comprising an ultrasonic transducer with a longitudinal vibration transformer, a spinneret and a waveguide, made of materials with different propagation speed of longitudinal ultrasonic waves, mounted concentrically one relative to each other. gogo and axis of the transformer of longitudinal oscillations and rigidly connected at one end with the output end of the transformer subal oscillations, and the other with a filler, which is located at a distance equal to an even number of half-waves for one of the rods and an odd number of half-waves of the second from the output end of the transformer of longitudinal vibrations; The die is made of two parts and is installed perpendicular to the axis of the waveguides.

The drawing shows the proposed device, a General view in section

The device contains a transducer 1 of ultrasonic vibrations, to the end of which are attached coaxial waveguides made in the form of a rod 2 and a cylinder 3 and inserted one into another with a gap. At the ends of both waveguides, in the antinodes of longitudinal oscillations, two halves of the co-detachable die 4 are fixed, between which a cleaned pipe 5 is drawn.

The device works as follows.

Upon excitation of the transducer 1 ultrasonic oscillations, in the core 2 and in the cylindrical 3 waveguides, standing waves (diagrams b and 7) appear, and the displacement of the ends of the waveguides with the fixed halves 4 in the longitudinal direction occurs in antiphase. Due to this, the walls of the pipe 5, which moves with respect to the halves of the die 4 and is continuously voiced, make perfect vibrations on one of the axisymmetric modes, significantly intensifying the process of cleaning the pipe. Periodic radial change (increase and decrease) in the pipe diameter, which occurs with ultrasound frequency, leads to rapid destruction of the film of contaminants on the pipe surface and contributes to intensive movement and removal of the polluted liquid from the pipe walls. The cleaning fluid can then be poured into the pipe, pumped through it, or the pipe can be immersed in a bath of detergent solution. The proposed device can be effective only for ultrasonic treatment, mainly for cleaning precision thin-walled pipes, which is due to the fact that the proposed device does not have elastic pressing of the spinnerets to the pipe being cleaned, and since constant acoustic contact and the same part of the pipe are necessary at the same time cannot make antiphase oscillations, the pipes should be 5 thin-walled and made of yrjpyroro material in order to ensure that it is pressed against the die and the acoustic separation between iametralno opposite wall portions.

The use of the proposed device makes it possible to intensify the cleaning process of thin-walled precision pipes and test it gave the result of one hundred percent cleaning of pipes with a diameter of 25 mm, 2 mm thick, made of steel 20, from corrosion products and oil pollution in industrial water givani 4.8 m / s.

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Claims (1)

Invention Formula Device for ultrasonic parts processing, mainly 5 cleaning precision thin-walled tubes containing an ultrasonic transducer with a longitudinal vibration transformer, a spinneret and waveguides made of materials with different propagation speed of longitudinal ultrasonic waves, installed concentrically one relative to the other longitudinal vibrations of the transformer and rigidly connected at one end to the output end of the transformer longitudinal oscillations, and the other with a filler, which is placed at a distance equal to an even number of half-waves for one of the rods It and an odd number of half-waves of the longitudinal oscillation second from the output end of the transformer, characterized in that, in order to intensify the processing, by excitation of the part on an axisymmetric mode, flexural band j, the nozzle is made integral of two parts and installed perpendicular to the axis of the waveguides. .Sources of information, 0 taken into account during the examination 1. USSR author's certificate No. 329924, cl. B 21 C 1/00, 1970.