SU475643A1 - Device for monitoring and recording equipment operation - Google Patents

Description

one

The invention relates to the automation of the collection of primary information in the field of automated control of the production of rubber and asbestos technical products and is intended for fixing the production state - load level, counting production per cycle and monitoring the technical health of seals of the hydraulic system of cyclically operating equipment, for example, hydrovulcanization presses.

The device can be used for these purposes in similar industries where equipment operation is cyclical and is accompanied by the creation of pressure on polymer, metal, leather and other similar blanks or on some physical mixture to form using the pressure of the desired product, as well as to control production states of some types of casting machines.

In a known device for recording the production of presses, information on the operation or simple production of a press is obtained from a command electropneumatic device controlling the operation of the press. The known device contains a pressure sensor, an AND circuit, the output of which is connected to one of the elements of Memory, an OR-NOT circuit, one of the inputs of which is connected to the input of the first element of Time Delay, the second and third elements of the Time Delay.

However, using such a device, information is obtained about the operation of the press and the number of products manufactured by it over a cycle with low credibility, since the presence of pressure in the hydraulic system or the closed contacts of the command device is not an objective sign of raw press loading. The correctness of the primary information leads to misinformation of the operating personnel. , and management technique makes ineffective. The purpose of the invention is to increase accuracy

device operation.

This is achieved by the fact that the element "Inhibit, switch, diodes and relay with a closing contact, the pressure sensor is connected to

to the input of the second element "Time delay and to series-connected elements" Prohibition, "Time delay and" Memory, the output of which through the corresponding diode is connected to another input of the OR-NOT,

output connected to one of the inputs of the circuit "And, the other input of which is connected to the output of the third element" time delay, the second element "time delay through the corresponding diodes connected to

to the elements “Memory, and the inverse input of the element“ The prohibition is connected to the relay connected via a rectifier to the output of the third element “time delay and, through a switch, to the collective closure cycle. The drawing shows the structural scheme of the proposed device. The circuit contains a pressure sensor 1, the closing contact of which is adjusted to the maximum pressure and the disconnect KOI stroke of pressure sensor 1 is adjusted — the possible maximum pressure in the hydraulic system; element "Prohibition 2 with inverse input 3: the first element" Time delay 4, which is adjusted to the time of the disappearance of the contact in the circuit of sensor 1 as a result of possible contact bounce; the scheme “OR-5E; the second element is “Time Delay 6; scheme "And 7; eleme ;; you "Memory 9; relay 10 with its own closure 11; switch 12; diodes 13, M and 15; solver 16; the third element is “Time Delay 17. S CTpoAcTBO works as follows. In the initial state, before turning on the press, the signals in the circuits of the sequentially connected locking it and the opening coitact of sensor 1 are absent. As a result, there are no signals at the inputs of the element "Prohibition 2, the first 4, the second 6 and the third 17 elements" Time Delay, the elements "Memory 8, 9 and are available at the outputs of the" OR-NO and the second element "Time Delay 6. With the output of the latter signal goes through the diodes 14 and 15 to the inputs of the output channels of the elements Memory 8 and 9, as a result of which there are no signals at the device outputs, which characterizes simple equipment and, consequently, the lack of output. With increasing pressure, due to the hydraulic system being put into operation, the press plates are joined, and the process of forming the product in the mold chambers located between the press plates begins. This transitional process lasts for different times depending on the number of raw blanks in the molds of the controlled press, i.e., depending on the extent of its loading. Product shaping lasts from the moment the plates are joined until the working pressure is set. Consequently, from the moment the minimum pressure is reached, the closing contact of pressure sensor 1 is closed, and at the output of the element "Ban 2" a signal appears that goes to the input of the circuit "OR-PE 5" and the damping element "Time delay 4, set for a time longer the possible disappearance of the input signal, due to the chattering of the contacts of sensor 1 at the time of their switching. Simultaneously from the moment the minimum pressure was reached, which is characterized by the closure of the closure 1, its sensor contact 1, a signal is sent to the second "Delay of time 6, the output signal of which disappears and thereby prepares the elements of" Memory 8 and 9 "to receive the reference signals. The “Time Delay 4” damping element with its output signal includes the third element “Time Delay 17, the number of output stages of which is equal to the sum of the number of possible stuny of loading the press with blanks and the stage controlled by P1 and its technical condition of hydraulic seals. Download press 50%. The generated signal of the first stage of the element 17, corresponding to the half load of the press with blanks, is fed to one of the inputs of the circuit “And 7. After a short period of time equal to 1-2% of the set time of this stage, the main signal at the input of the element“ Time delay ”disappears 4 due to the opening of the contact of sensor 1 when the operating pressure is reached. The "OR-NOT 5" circuit operates until the main signal disappears, and the signal that triggers the "AND 7 circuit appears at its output. The reliability of this process, which triggers the" AND 7 circuit, is supported by the element "Time delay 4, having a delay of up to 3 seconds . Scheme "AND 7 controls the element" Memory 8, on the input of which a signal appears, corresponding to the first half load of the press, which is sent to the information processing circuit. The fact of the occurrence (change) of the signal characterizes the production of the press for the center. The output of Memory 8 is extinguished when the press is turned off for a time longer than for determining the readiness of the product, which is characterized by the absence of pressure in the hydraulic system. Then the previous state (zero) of the element “Delay of time 17 disappears, and a signal appears that returns the corresponding element of“ Memory 8 to its initial state; the signal from the output channel is fading, and starting idle. If, however, the absence of the minimum pressure, characterized by the closing contact state of sensor 1, is less than the time required for determining readiness of parts - the installation time of element 6 (which characterizes the activation of pressure on the secondary cycle of the product), the element Memory 8 is not returned to its original state, and the signal on loading the press is not stopped, and since it has not changed, the production during re-cooking of the blanks is not taken into account. Download press 100%. The element fire delayed. Time delay 17 has no influence on the output channel, since the pressure in the hydraulic system has not reached the maximum value, and the signal at the output of the element “Ban 2 does not disappear. With a further increase in the time of increase in pressure, the element "Delay of time 17 reaches the specified setting (1-2% less than the actual time of increase in pressure, characterizing the full, 100% load), and the signal at its output includes the element" Memory 9.

The “Memory 9” element gives a signal that the press is fully loaded into the information processing circuit. At the same time, the element "Memory 9 sends a prohibition, ayush, s signal to the input of the circuit" OR-NOT before the signal at the output of the element "Prohibition 2.

The return of Memory 9 when the vulcanization cycle ends is similar to that described in the case of half load.

When element 17 is triggered, relay 10 is turned on, and a prohibitive signal is applied in parallel to input 3 of the element “Interlock 2. Relay 10 becomes self-powered via switch 12 and its own contact 11, thereby preserving the prohibition signal for as long as necessary the whole device as a whole from the false formation of information about the production state, i.e., the degree of loading of the press and its production during possible subsequent cycles.

At the same time, the relay 10 opens the press start circuit for the next cycle with its disconnecting contact (not shown in the drawing) and closes the ringing circuit of the special repair service with another closing contact (not shown in the drawing).

When the malfunction in the seals of the hydraulic system is eliminated, pressing the switch 12 restores the circuit of the device, and

thereby, the ban on automatic control of the production and technical condition and production accounting is lifted.

Subject invention

A device for monitoring and recording equipment operation, containing a pressure sensor, an AND circuit, the output of which is connected to one of the elements Memory, an ORI circuit, one of the inputs of which is connected to the input of the first element Time Delay, second and third elements "Delay time, characterized in that, in order to improve the accuracy of the device, the element" Prohibition, switch, diodes and relay with a closing contact is entered into it, with the pressure sensor connected to the input of the second element "Delay time and serially connected th “Prohibition,” “Time Delay” and “Memory”, the output of which through the corresponding diode is connected to another input of the circuit “OR NOT, the output connected to one of the inputs

“And the other input of which is connected to the output of the third“ Time Delay ”element, the second“ Time Delay ”element through the corresponding diodes is connected to the“ Memory ”elements, and the inverse input of the“ Ban ”element is connected to a relay connected via a rectifier to the output of the third element“ Delay time and through the switch to its own normally open contact.