SU642648A1 - Automatic device for ultrasonic inspection - Google Patents

Description

one

The invention relates to the field of non-destructive methods and means of control and can be used in mechanical engineering, for example, in the defectescopy of flat (end) surfaces of disks.

A device for the automatic control of products by an ultrasound method is known, comprising: a piezoelectric probe, the movement mechanism of which is composed of two separate waves, one of which is made in the form of a screw with a nut, on which the probe holder is fixed, and two limiters of its movement by limit switches the second contains an electromagnetic i-step ratchet mechanism.

The drawbacks of the device are low control performance, the impossibility of quickly moving the piezoelectric probe to its original position, as well as the presence of two mechanisms for moving the probe, which complicates the design.

The closest technical solution to the present invention is an automatic machine for ultrasonic control of disks containing a frame, a rotating table mounted on it, a rotation speed control unit

a table, an ultrasound generator, a scanning unit including a lever with an arrow head and a display unit.

The drawback of the automaton is that it does not provide a high quality of surface control, since during the control part of the surface may be skipped due to the inconsistency of the movement step of the search head.

The aim of the invention is to increase the productivity and quality of control.

This is achieved by the fact that the machine is provided with a rod with a hole, spring-loaded along its axis and placed parallel to the surface table91, a copier in the form of a spiral of constant pitch, installed along the perimeter of the foot, and an electromagnet with a fixed rod at the edge of the hole, along its longitudinal axis and at one end in contact with the hole of the rod, and the second - with a cam.

The drawing shows the kinematic diagram of the automaton.

Claims (1)

The machine contains a frame (not shown in the drawing) on which a table 1 with a rotation 2 drive, a power and switching unit 3 and a rotation speed control unit 4 are on (an angular velocity sensor 5, a comparison device, an executive converter 7 and Scanning unit Scanning: the unit includes in itself a lever 8, an arching head 9 fixed on it, an ultrasonic generator feeding it (not shown), a rod 10 with a hole II placed parallel to the surface of the table and spring-loaded along its C spring 12, an electromagnet 13 fixed to the rod at the edge of the hole, and a copier 14 in the form of a spiral of constant pitch, which is installed around the perimeter of the table 1. The lever 8 is spring-loaded using a spring 15 relative to the rod along its longitudinal axis and with one end in contact with the hole 11 bars and a second one with a cam 14. The machine is equipped with a sensor, 16 linear displacement connected to block 4, and a rheostat 17, the bar 10 is installed in the direction 18. The switch 19 and the rheostat 17 are installed along the rails 18 cession with control rod end 10. Switch 20 is designed to turn off the electromagnet and actuator incorporating two rotating table. The output of the finisher 9 is connected to the display unit 21. The machine operates as follows. On table 1, a controlled disk 22 is installed. Switch 20 turns off electromagnet 13 and turns on drive 2 of table rotation. The lever 8 by the action of the spring 15 is in contact with the helix of the copier 14, under the action of which it moves, simultaneously moving the search head 9 and the rod 10. The ultrasonic generator provides sounding of the test product 10, and the display unit records the results of the control. The rod 10 moves in the guides 18, squeezes the spring 12 and moves the slider Tafa 17 connected to the sensor 16. The electrical signals of the linear displacement sensor 16 and the angular velocity sensor 5 are fed to the comparison device 6. The difference of these signals ns b of the device 6 enters the executive converter 7 and then the table rotation drive 2. 84. The voltage of the sensor 16 determines the speed of rotation of the motor shaft of the drive 2 and, accordingly, of the table 1, depending on the position of the search head 9 relative to the center of the disk 22. Thus, the device maintains the speed of control of the product surface. At the end of the control, the rod 10 rests on the switch 19, which turns off the power of the actuator 2 and turns on the electromagnet 13. The latter brings the search head 9 out of contact, compressing the spring 15. At the time the lever 8 leaves the copier 14, the spring returns the rod 10 in the original position. After mounting on the copier 14 of the product in the middle, the switch 20 switches off the electromagnet 13, and the spring 15 introduces the lever 8 into contact with the coil of the copier 14 and, at the same time, the search head 9 in the working position, the cycle repeats. The use of an automaton will improve the quality of disk control by providing scanning of its entire surface and improve the performance of the control, which will reduce the cost of manufacture of products, increase their reliability and durability in operation. An automaton for an ultrasonic disk control device comprising a frame, a rotating table mounted on it, a table rotation speed control unit, an ultrasonic generator, a scanning unit, an articulated head lever and an indication unit that differs from in order to increase productivity and quality of control, it is equipped with a rod with a hole, spring-loaded along its axis and placed parallel to the table surface, with a copier in the form of a spiral of constant pitch, installed along the meter section and Ohm electromagnet fixed to the rod at the opening edge, the lever is spring-loaded relative to the rod along its longitudinal axis and one end of the rod in contact with the hole, and the second - the copier.