SU1710991A1 - Method of testing article surface run-outs - Google Patents

Abstract

The invention relates to a measurement technique, in particular, to means for measuring linear dimensions, for example: to monitor the beating of seats for feedback sensors (DOS) in radio and optical telescopes. The purpose of the invention is to expand the scope of application of the method by providing inspection of parts with limited working angles of rotation. On the bearing support housing place the reading device with a measuring tip. In this position, set the zero of the reading device. Then, the actuating axis (disk) is rotated clockwise by the value of the allowable working angle and at the same time the readings of the reading device are recorded. Then the disk is returned to its initial position (counterclockwise) and the reading device is moved in the same direction and at the same angle, and the reading on the scale corresponds to the measurement in the final position. The rotation of the actuating axis is repeated many times within the working angle until the sum of the angles of rotation in one direction is equal to at least 360 °. In a corresponding manner, the measuring device is repeatedly moved, the initial readings are established, and the beating is measured. 5 il.

Description

The invention relates to means for measuring linear dimensions, in particular for checking beats, for example, seating for feedback sensors (DOS) in radio and optical telescopes.

The known method of controlling the beating of the part butt through which the intermediate element and the measuring rod of the readout node contacting with it are created, the relative rotation of the intermediate element and part is created, and the beating of the end face is judged by the readings of the readout node .;

However, this method does not allow control of parts with a limited angle of rotation.

Closest to the invention in its technical essence is a method for controlling the radial beat, which is carried out using measuring heads. The measuring tip of the reading device is brought to the surface of the part, which is based at the centers, on the mandrels or prisms and rotates 360 °. According to the readings of the reading device, the magnitude of the beating is judged.

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However, this method has a rather narrow area of application, since it does not provide control of parts with a limited (less than 360 °) working angle of rotation.

The aim of the invention is to expand the scope of application of the method by providing inspection of parts with limited operating angles of rotation.

The purpose of the invention is achieved by the fact that the relative rotation of the part is repeated many times within the working angle of rotation of the part until the sum of angles of rotation in one direction equal to at least 360 ° is reached, and before each next rotation of the part the counting device is reinstalled by a step equal to the angle of rotation of the part , and establish on it the initial reading corresponding to its reading in the previous measurement in the final position. .

FIG. 1 given the executive axis of the telescope; in fig. 2 — node I in FIG. 1 (with installed TO Som); in fig. 3 shows the node I in FIG. 1 (DOS removed); in fig. 4 is a diagram of beating measurements: in FIG. 5 is an indicative graph of the change in beats, measured by the proposed method.

The actuating axis of the turntable (OPU) of the telescope is formed from two bearing supports 1 and fixed to the semi-axis x 2 of these supports of the input device 3. The DOS 4 is fixed to the end of the semi-axis 2 through an intermediate disc 5. on which the landing surfaces under the rotor 6 are formed : a cylindrical surface A on diameter B and an end surface B. The rotor in DOS is attached to the disk 5. The stator 7 of DOS is fixed in the case 1 of the support 1 through an intermediate disk 8. On this disk, the landing surfaces are formed and the surface D on the diameter D and the end surface E. The disks 5 and 6 have the possibility of radial movements due to the connector with the semi-axis 2 and the casing of the support 1 along the plane Ж and 3, respectively, for adjusting the radial sides A and D relative to the actual axis of rotation N. End face planes Ж and 3, respectively, axles 2 and support bodies 1 have the possibility of individual adjustment for adjusting the face beating of surfaces B and E relative to the actual axis of rotation N. Semiaxes 2 are mounted on bearings 9 in support bodies 1.

The approximate values of the radial beats of the surfaces A and D and the end beats of the surfaces B and E relative to the axis H are 0.03-0.05 mm.

FIG. 4 shows the sequence of measurements of the radial beats of individual sections of the surface A of the disk 5. Each of the consecutive positions

marked by the letters a, b, c, d, d, e, f, s, and. The points of surface A, with which the measuring tip 11 contacts with each of its initial installation, are designated by the numbers I, II, III, IV. The positions of the reading device 10 are indicated by the numbers 1-1, 2-2, 3-3, 4-4. The thickened line on the circle indicates the surface area A of the disk 5 on which the beating was measured. Rotating a disc simultaneously implies a rotation of the executive axis. The position of the disk corresponding to the zero angular position of the executive axis is called the initial position. The second position of the disk after the rotation of the executive axis to the permissible angle is called the final position.

The method is carried out as follows.

We take the permissible angle of rotation of the executive axis 0 - 90 °, and rotate it from the initial position to the final position in a clockwise direction.

Work begins with the installation on the housing of the bearing support 1 reading

devices. 10 with a measuring tip 11, for example a dial gauge. The disk 5 is set to the Initial position, and the reading device is set to the 1-1 position, while the measuring

the tip is in contact with the surface A of the disk at point I (Fig. 4a). In this position, a zero 01 0) reading device is set.

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the axis on the lead indicates the allowable angle (in this case, clockwise by 90 °) and simultaneously reads the reading device. In the final position of the disk (Fig. 46), the measuring tip is in contact with surface A at point II, and the beat value here is dg.

Then the disk 5 is returned to the Initial position, and the reading device 10 with the measuring tip 11 is displaced counterclockwise and set to the position 2-2, in which the measuring tip contacts the surface A at point I. In this position on the scale of the reading device they set reading equal to & (Fig. 4c).

The actuating axis is rotated again by 90 ° and readings of the reading device are taken. In the final position (Fig. 4d), the measuring tip is in contact with

the surface of the disk at point III, and the magnitude of the beat in this place is (5h.

Then the disk is rotated twice from the Start position to the End position and back, and before each next rotation of the executive axis to the End position, the reading device is moved counterclockwise by 90 ° and the reading on the scale corresponding to the reading in the previous measurement in the end position is set: in position 3-3 set the initial count 5h (Fig. 4e); in position 4-4 set the initial readout for (Fig. 4g).

As a result, the cycle of measurement of the beat consists of 4 turns of the actuating axis through 90 °, thereby checking the beat at an angle of 360 °.

In the case of separate turns, for example, at 60 °, the measurement cycle would consist of 6 turns. That is, the rotation of the part must be repeated many times within the allowable working angle until the sum of the angles of rotation in one direction is equal to at least 360 °.

Moving the measuring device counterclockwise (against the direction of rotation of the executive axis from the Start position and End position) ensures the continuity of measurements (Fig. 5). As a result, when the measuring device is in position 4–4 and the measuring tip is aligned with point I on the scale, there should be an indication corresponding to the beginning of the measurements, i.e. 5 5 5 0 (Fig. 4 3). ;

Similarly, the face beating of JJ

disk 5.

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The radial beating of the surface G and the face beating of the surface E of the disk 8 are measured in a similar way with the only difference that the reading device is mounted on the disk 5, and the measuring tip is in contact with the surfaces G and E, respectively.

Thus, due to the peculiarities of the implementation, the proposed method, in comparison with the known method, provides for the expansion of the field of application by ensuring the inspection of parts with limited working angles of rotation.

The formula is invented and the method for controlling the beating of the surfaces of the parts, which consists in the fact that the interaction with the controlled surface leads to the measuring tip of the reading device, create a relative rotation of the workpiece around its axis and the value is judged by the reading of the reading device, distinguishing and so that, in order to expand the scope of application of the method by ensuring control of parts with limited working angles of rotation, the relative rotation of the part is repeated many times within the working angle along orbit of the part to achieve the sum of the angles of rotation in one direction equal to not less than 360 °, before each next rotation of the part reinstall the reading device to a step equal to the angle of rotation of the part in the direction opposite to the direction of rotation of the part, and set on it the initial reading corresponding to his reading in the previous measurement in the final position.

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Claims (1)

Claim A method of controlling the beating of surfaces of parts, which consists in the fact that the measuring tip of the reading device interacts with the surface to be monitored, create a relative rotation of the part around its axis and judge the value by the reading of the reading device, which differs in that, in order to expand the area applying the method by providing control of parts with limited working angles of rotation, the relative rotation of the part is repeated many times within the working angle of rotation of the part until I the sum of the rotation angles in one direction, equal to at least 360 ° /, while before each subsequent rotation of the part, the reading device is reset by a step equal to the angle of rotation of the part in the direction opposite to the direction of rotation of the part, and the initial reading corresponding to its indication is set on it in the previous dimension in the final position. Figure 1 I a H