SU814511A1 - Method of automatic counting of forging-and-pressing machine working strokes - Google Patents

Description

one

The invention relates to mechanical engineering, in particular to equipment operation systems.

A known method of automatically counting the number of working strokes of a kuene-spring machine, at which a load signal is obtained, is summed up and compared with the / predetermined threshold value, thus forming a counting signal l.

However, the known method has an inadequate counting stability with changes in the initial load signals over a wide range, which is the case under actual operating conditions of the equipment.

The purpose of the invention is to increase accuracy and stability.

This goal is achieved by the fact that they form an intermediate signal when the threshold value is exceeded by the above-mentioned result of the summation, they receive a signal of the presence of interference and when it coincides

in time, an interdiction signal is generated with an intermediate signal, and the counting signal is separated from the intermediate signal in the absence of an interference signal, and if the counting signal and the interference signal coincide in time, the counter signal disappears.

The source signals of the load are the current and voltage in the phase of the driving motor, recorded by the respective sensors. The interference sensor is also connected to the engine power supply circuit, and information on the presence of interference at its output is presented in a logical form. The zero of the logical signal corresponds to the absence of interference in the drive power supply circuit, and the unit of the logical signal corresponds to the presence of interference.

The drawing shows time diagrams of all signals.

Claims (1)

The source signal A is proportional to the phase voltage in the power supply circuit of the drive motor. The source signal B is proportional to the current in the same motor phase. The signal, the presence of interference C. The time moment -t - -fej corresponds to the colostum stroke of the press ram, and the moment of sleepiness i. - -t - to the working course. A deliberately idle stroke of the press Prahn (moment of time) is performed, during which the initial signals from the current sensors are summed up and the voltage is obtained the threshold value of the sum of the initial signals X) I corresponding to the idling and memorize it. When making a working stroke of the press slide {time point (C 4 the sum of the initial signals E, accompanying the work of the press slide, exceeds the threshold value, an intermediate signal F is generated and, since the interference signal C at the output of the noise sensor is absent, receive a counting signal G If at the moment of idling (time bc tg) the voltage in the power supply circuit of the electric motor of the drive increases for some time, then the sum of the initial signals E may exceed the threshold value D. Generate intermediate sy F. At the same time, a C signal is present at the output of the interference sensor. Since both signals coincide in time, the signal for inhibiting the account H is generated. Thus, the external disturbance during idling is not counted as a working stroke. When making a working stroke (time tj-ig) the voltage in the power supply circuit of the electric motor of the drive can dramatically decrease for some time.The sum of the initial signals E is less than the threshold value D, which leads to the disappearance of the intermediate signal F for some time. At the same time, at the output of the interference sensor, there is a signal of the presence of interference C, which prevents the counting signal C from being split into two signals in the presence of an external disturbing effect. Thus, an automatic stable counting of working strokes is provided in the presence of source signals, regardless of the magnitude and phase of the interference signals. The efficiency of using the automatic method of counting the number of working strokes of a forging machine is achieved by increasing the accuracy and stability of the work. The invention The method of automatically counting the number of working strokes of a forge-pressing machine, at which two initial load signals are obtained, is summed up and compared with the predetermined threshold value, forming a counting signal, characterized in that, in order to increase the accuracy and stability of counting , they form an intermediate signal when the threshold value is exceeded by the above summation result, they receive a signal of the presence of interference and when it coincides in time with the intermediate signal of the forms They prohibit the signal, and the counting signal is separated from the intermediate signal in the absence of an interference signal, and if the counting signal and the signal coincide in time, the interference prevents the counting signal from disappearing. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 335709, cl. G 07 C 3/10, 14.01.7O. Jj. E .tz tj. Fs ts H 6 il