SU407701A1 - VPT5 - Google Patents

Description

The invention relates to the field of electrophysical processing methods and relates to a device for controlling the feed in multi-circuit electro-erosion processing.

Devices are known for regulating the supply of tool electrodes in multi-circuit EDM processing, in which the feed controller is connected to a peak detector type RC connected to one loop.

The aim of the invention is to provide control over the most loaded of the n operating circuits. When powering the latter from independent generators.

The goal is achieved by the addition of n-1 peak type C detectors connected to the other circuits and loaded with ballast resistances, each of which is connected to the first peak detector through a separating diode in parallel with the feed controller.

FIG. 1 is a schematic diagram of a feed control device; in fig. 2 - a device with the introduction of stabilizers nairau him.

FIG. 1 shows independent electroerosion circuits 1 and 2, which have one feed regulator 3 connected to peak detector 4 fed from terminal 2

Tour 1. Additional peak detector 5 is powered from circuit 2 and loaded with ballast resistance 6, which is connected via diode 7 to peak detector 4 in parallel with feed controller 3. The figure also shows the n-th circuit and the additional peak detector powered by it the load resistance of which is connected to the peak detector 4 parallel to the controller 3.

FIG. Figure 2 shows independent electroerosion circuits I, 2 n, connected through peak detectors 3, 4, n, having ballast resistances 5 and voltage stabilizers 6, 7, and n with a common feed regulator 8.

The time constants of the charging circuits of all detectors are the same, the time constants

The bit circuits of all detectors are also equal. Therefore, at the same load, all erosion contours of the capacitance of all peak detectors are charged to the same voltage. When not the same

the load of the circuits of the capacity of the detector, powered from the most loaded circuit,

will be charged to the lowest value

tension

The device (Fig. 1) works as follows

in a way.

At the busiest circuit 1, the capacitance of the detector 4 is charged to the lowest value among the capacitances of the peak detectors. Dividing diodes 7 are closed and the regulation is conducted on the voltage across the capacitance of the detector 4, which corresponds to the regulation on the circuit 1.

With the most loaded counter 2, the capacity of its detector 5 will be charged to the lowest voltage value among the capacities of peak detectors, including detector 4.

Dividing diode 7 is displaced in the forward direction, and the capacitance of the detector 4 is discharged to the ballast loading Resistance 6 to the level of the voltage on the capacitance of the detector 5.

The regulator is supplied with a voltage corresponding to the voltage of the detector 5, which is equivalent to regulation along circuit 2.

At the busiest circuit n, the capacity of its detector will be charged to the lowest voltage, which will similarly lead to the discharge of the capacity of the detector 4 to the level of this lowest voltage.

Thus, the regulator 3 will always receive the lowest voltage from the most loaded circuit, which is sufficient to accomplish the goal.

The device (Fig. 2) works as follows.

The inputs of the peak detectors 3, 4 receive a pulse voltage from the corresponding circuits 1 and 2.

The pulse voltage of the circuits is transformed by the detectors into a constant voltage, the magnitude of which is proportional to the amplitude of the pulse. The detected voltage is repeated at the output of the stabilizers 6 and 7. The accuracy of the repetition of the detected voltage at the output of each stabilizer

can be quite high due to the use of multi-stage stabilizers.

The outputs of the stabilizers are connected in parallel with each other and therefore the minimum of all voltages supplied to the inputs will be maintained at the points of their connection.

This minimum voltage is applied to the regulator 8, which provides regulation on the most loaded of the circuits.

Thus, an increase in the accuracy of adjustment in the device is achieved by preliminarily converting the pulse voltage to a constant, the magnitude of which is proportional to the amplitude of the signals.

Subject invention

A device for controlling the supply of p electrodes-instruments located

on one spindle of an electroerosive machine, in which the feed controller is connected to a peak detector of type C, connected to one circuit, characterized in that, in order to ensure control over the most loaded of n operating circuits when powered from independent generators, n - 1 peak detectors of type RC, included on the other circuits and loaded with ballast are introduced

resistances, each of which is connected to the first peak detector through an isolating diode in parallel with the feed controller.

-Ьb- J

one

,

tLlt

and

-ttr CZb

and

rt

iH

(Pui.Z