SU1557451A1 - Method of measuring the error of kinematic chain - Google Patents

Abstract

The invention relates to mechanical engineering, namely to means of controlling gears. The purpose of the invention is to measure the error under conditions that mimic operational, due to the removal of additional samples in the position of sextant links in the working state. This is achieved by the fact that two series of measurements are additionally carried out with the master link set to the zero position during its reverse course, and the angles are measured during the forward and reverse stroke of the master link (screw). The data obtained is used to calculate the correction. 1 il.

Description

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The invention relates to mechanical engineering, namely to means of controlling gears.

The purpose of the invention is to measure the error in conditions that simulate operational, by removing additional samples in the position of the sextant links in the working state

The drawing shows a schematic diagram of the device for implementing the proposed method for measuring the error.

The device contains a rotary table 1, on which a controlled sextant 2 is installed. The rotary table 1 includes a circular precision scale 3 and an index k. As an index b, a microscope can be used. The sextant contains a worm pair, the leading link (the worm to) is fixed in the body and connected via alidade 5 to the mirror 6, the reading drum 7 is connected with the worm, the index of the drum 7 is applied to the worm body 9.

To implement the method, the rotary table 1 is set to the zero position and the drum 7 of the screw is set to the zero position from the forward stroke. The autocollimator 9 is set to the zero position 9. The worm is turned from the forward stroke to the angle Rob (), while the alidade 5 with the mirror 6 is turned to the angle ОЈ + & 1m. Turn table 1 at an angle about in the direction opposite to the direction of rotation of the alidade 5. The first (i-1) countdown is removed by the autocollimator

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Act ,, oiJi -oi / P., Equal to the circuit error in the ОЈ position. Then, from the forward stroke, the drum 7 of the screw is set to the zero position and turned from the forward stroke the screw to the angle P2ot (i 2). Alidade 5 with mirror 6 is rotated through an angle of 2Ј + Ao /, a (). Table 1 is rotated by an angle of 2dL in the direction opposite to the direction of rotation of alidade 5, and the autocollimator is read off by counting 12 rf ,, equal to the error of the circuit in the 2 Ј position. The error is determined sequentially in n positions. After the first series of readings is performed, the second one is carried out, in which the screw to position Pi is set from the reverse stroke, and the position zero is set from forward travel. As a result, a second series of ud7 samples is obtained; . A third series is carried out, in which, before installing the screw from the forward stroke to the Pi position, the rods are set to the zero position (1U) from the reverse stroke and the readings A are taken ,; .

Then, a fourth series of readings is carried out, in which, before installing the worm from the reverse stroke to the Pi position, the pilot is set to the zero position () from the reverse stroke and the readouts &oC;.

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Determine the error of the circuit in the i-x positions by the formula

. . Aeir, + AO + DOTs; + AC; ij.

ETC

and me. For sextant we have P "720," i 5 °. When from the forward stroke, the screw is turned at an angle of 5 to 3600 °. An alidade with a mirror is rotated by an angle ОЈ + AtfH, for example 45 by an angle of 5 ° + 10. Turn the table by an angle of 5e in the direction opposite to the direction of the alidade — and take the first reading of & oiM 5 ° + 10 3600 ° / 720 10,

Turn the screw to at an angle of P2cl 720 2 -5 ° 7200 °. The alidade with a mirror is rotated by an angle of 2 ° 5 ° + 5 °. Turn the table at an angle of 2-5 ° and remove the readout from autocollimatoroC 5. Similarly, a second series of readings is performed, in which the screw k is set to the Pio6 position from the reverse stroke. In accordance with the description, read the readings Л ei, and A Ы4 |.

In this way, the measurement of the error of the circuit is performed under conditions simulating the operation of the circuit.

Claims (1)

Invention Formula 5 0 5 0 five 0 45 A method of measuring the error of the kinematic chain, which consists in comparing the angles of rotation of the driving link with the angle of rotation of the driven link when two series of readings are taken from the installation of the driving link to the zero position during its forward course, and In the second series, in the second run, during the return run of the lead link, and by the mean value of the values obtained during the reading of the readings, the kinematic chain error is determined, in order to measure the error under conditions simulating operational, the third and fourth series of readings are removed with the leading link set to the zero position during its reverse course, while in the third series the angles are read during the forward course of the leading link, and in the fourth series - during the reverse run lead, and use this data to determine the error in the kinematic chain. i