SU302659A1 - Actuating mechanism of servo system of ultrasonic flaw detector - Google Patents

Description

(54) EXECUTIVE, MECHANISM OF THE FOLLOWING SYSTEM OF ULTRASONIC DEFECTOSCOPE

The invention relates to the measurement technique, namely to the follow-up actuators: an ultrasonic flaw detector system used to control products of complex shape.

Known actuator follower t. ultrasonic flaw detector systems containing an artifact head with working and following piezoelectric elements, a reducer and controlled electric motors

 However, the known mechanism does not provide the required reliability of control, since the axis of rotation of the working piezoelectric element does not pass through the point of entry of the ultrasonic beam on the surface of the tested product. Therefore, the ultrasonic beam is not always directed perpendicularly to the surface of the defect to be detected, which can lead to the omission of this defect.

For this, the mechanism is supplied with kinemagics associated with controlled ones. the piezoelectric elements of the electric motor are a crank mechanism, the axis of rotation of which is moving in two mutually perpendicularly cool planes, following the curvilinear, surface of the product under test, and the shaft connected to the armature-directional heading of the working body of the controlled heading with the head of the controlled article, rotation relative to the point of entry of the beam at a given angle in accordance with the relief of the product.

FIG. 1 isopafe offered

5 mechanism; FIGS. 2-4 are Kroniggeyn in the period of the various control phases, three positions.

The mechanism contains an arrowhead 1 with a working piezoelectric element 2 and 0 /

following piezoelectric elements, not shown in the drawing), gearbox 3, controlled by the following piezoelectric elements electrodes 4 and 5, the crank mechanism consisting of the rod 6, tube 7 and bracket 8, in which the piezoelectric element 2 is installed in arcuate directions 9, and kinematically connected with the electric motors 4 and 5, the shaft 10, connected with the working 1-gm piezoelectric element and ensuring its rotation through the rocker mechanism 11, connected with the gearbox 3.

In the process of control seeks to

the head monitors the curvature of the surface of the test article 12 with the help of tracking piezoelectric elements, control motors 4 and 5. The latter orient

head icy is normal and equidistant with respect to the surface of article 12, the head axis is inclined by an angle (b from the vertical when scanning oblique areas.

This provides detection of defects oriented perpendicular to the radius of curvature of the surface of the product 12.

In order to detect defects that are oriented parallel to the mid-plane of the product, the refracted beam should be directed at an angle to the normal. For this, the working piezoelectric element 2. Is mixed in the arcuate directions of 1c 9 in the angle -Jpc by means of the shaft 10 connected through the rocker mechanism 11 with the gearbox 3.

At the same time, the piezoelectric element 2 is rotated relative to the point of entry of the beam by an angle of 2 in accordance with the relief of the product 12.

Claims (1)

Invention Formula The actuator of the ultrasonic flaw detector's slewing system, which contains an arcing head with a working and following piezoelectric elements, a reducer and an electric motor control, characterized in that, in order to improve the detection of defects of different orientations, it is equipped with kinematically connected with the following piezoelectric elements by an electric motor with a crank mechanism, the axis of rotation of which, moving in two mutually perpendicular planes, follows the curvilinear surface of the controlled product m, connected with the working piezoelectric element installed in the arcuate guides and ensuring its rotation relative to the beam entry point at a given angle in accordance with the relief of the product. /  L) .1 "Pt / e.2 / 2 F "ang 5