SU120650A1 - The method of control along the chord of the constant length of large diameters of cylindrical articles and the device for implementing this method - Google Patents

Description

A known method of control along a chord of constant length of large diameters of cylindrical articles, processed, for example, on rotary machines.

The described control method, in contrast to the known method, improves the performance of control operations and allows control to be made during the processing of the product. This is achieved by applying, for example, a magnetic or radioactive mark on the surface of the workpiece and, by the angle of rotation of the part corresponding to the movement of the mark along an arc drawn by a chord of constant length, determined by Eot the diameter to be checked.

For the implementation of the method, a device is used consisting of two fixing movements of magnetic heads located at a certain distance from one another and giving a signal to a sensor mounted on the axis of rotation of the part counting the angle of rotation of the part.

FIG. 1 shows a diagram of a device with electrical and optical parts thereof; in fig. 2-scheme of the node with magnetic heads; in fig. 3 is a diagram illustrating reproduction of the method.

Magnetic heads 2, 3, 4 and 5 of conventional construction are located on the plane of the controlled section of the part /, with a small gap between the poles of which and the surface of the measured rotating part.

Magnetic heads 2, 3, 4 l 5 are placed on a bracket attached directly to the support 6 of the lathe, consisting of the central part 7 and the edge sections 8 connected to part 7 by means of flat springs 9. Under the force of the springs 10, support rollers // magnetic heads touch the surface of the measured rotating item no. 120650

hoists /, for example, a cylindrical product with a large diameter. The head is 2-recording, the heads are 3 and 4-reproducing, the head 5 is erasing. The stop rollers // ensure the gap is maintained between the poles of the magnetic heads and the surface of the workpiece with an accuracy that ensures the constancy of the signal level at the input of the playback path.

Direct AA and BB, carried out in the plane of the controlled section of the part / through the centers of the slits of heads 3 and 4, are parallel to the respective boundary surfaces of each slit, parallel to each other and equidistant from the axis of rotation of the part. Under these conditions, the chord size CD connecting the points of intersection of the direct LL and BB with the circumference of the measured section does not depend on the diameter of the part and is the basis for measuring the central angle COD.

To apply a magnetic mark on the surface of the part I, a command pulse is sent from the push-button control panel 12 to the magnetic mark applying unit, consisting of an amplifier 13 and a recording magnetic head 2, causing magnetic reversal to saturation in the positive (of course) direction of the surface area of the part at the time of the passage of the pulse front under the poles of the head 2. When the part rotates, the portion of its surface exposed to the magnetic field leaves the poles of the head 2, retaining some residual th value differential magnetization whose magnitude is determined by the magnetic properties of the surface layer parts.

When the magnetic tag passes under the poles of the magnet heads 5 and 4, a voltage pulse arises in their windings, amplified by amplifier stages J4 or 15 and 16 and fed to the electronic switch 17, switching the part angle sensor with a reading device, which is used as counter 18 pulses.

The sensor of the angle of rotation of the part consists of a light transparent disk 19 with holes brought into rotation from the spindle 20 of the lathe through an additional raising gear 21; light source 22; photomultiplier 23 and amplifier 24.

The number of pulses at the sensor output is directly proportional to the angle of rotation of the part. The accuracy of the reference angle can be improved by increasing the gear ratio of the gearbox 21 and the number of holes in the disk 19.

Pulse counting continues until the magnetic head, located at the end of the chordal bracket, gives the command to stop counting when the magnetic mark passes.

Thus, by the angle of rotation of the part, which is determined by the number of pulses coming from the sensor, it is possible to judge the size of the diameter of the workpiece.

Subject invention

Claims (2)

1. A method of controlling along the chord of a constant length of large diameters of cylindrical products processed, for example, on rotary machines, characterized in that, in order to increase the productivity of control operations and to realize the possibility of control during processing, parts are applied, for example, magnetic or a radioactive label, or a label that can be recorded optically, and the angle of rotation of the part corresponding to the movement of the label along an arc drawn by a chord of constant length is determined by checking diameter. 2. A device for carrying out the method according to claim 1, characterized in that, in order to make a measurement when applying a magnetic mark, the device consists of two. H. magnetic heads that fix the movement of the mark, located at a certain distance from one another and giving a signal mounted on the axis of rotation of the part of the sensor, which produces a reading of the corresponding angle of rotation de FIG.