SU935317A1

SU935317A1 - Hydraulic press pressing speed regulator

Info

Publication number: SU935317A1
Application number: SU802989637A
Authority: SU
Inventors: Игорь Васильевич Фокин; Юрий Сергеевич Новиков; Виктор Николаевич Семыкин
Original assignee: Научно-Исследовательский Институт Тяжелого Машиностроения
Priority date: 1980-10-08
Filing date: 1980-10-08
Publication date: 1982-06-15

Description

1one

Изобретение относитс к машиностроению , в частности к конструкции оборудовани дл обработки давлением.The invention relates to mechanical engineering, in particular to the design of equipment for pressure treatment.

Известен регул тор скорости прессовани гидравлического пресса, содержащий задатчик и датчик скорости плунжера пресса, 5 подключенные к блоку рассогласовани скорости , соединенный с дросселем потока рабочей жидкости исполнительный электродвигатель , подключенный через тиристорньш преобразователь к выходу блока управлени 1. 0A press speed controller of a hydraulic press is known, which contains a setter and a press plunger speed sensor, 5 connected to a speed disparity block, connected to a throttle of a working fluid flow executive motor connected via a thyristor converter to the output of control unit 1. 0

Недостатком известного регул тора вл ютс невысокие точность и стабильность поддержани заданной скорости прессовани , обусловленные наличием значительной зоны нечувствительности.A disadvantage of the known regulator is the low accuracy and stability of maintaining a given pressing speed due to the presence of a significant dead zone.

Цель изобретени - повышение точное- 15 ти и стабильности регулировани .The purpose of the invention is to improve the accuracy and stability of the regulation.

Поставленна цель достигаетс тем, что регул тор скорости прессовани гидравлического пресса, содержащий задатчик и датчик скорости плунжера пресса, подключен- -.. ные к блоку рассогласовани скоростей, а также блок управлени , к выходу которого через тиристорный преобразователь подключен исполнительный электродвигатель, соединенный с дросселем потока рабочей жидкости , снабжен блоками коррекции и пам ти положени дроссел , а также датчиком давлени рабочей жидкости и сочлененным с дросселем датчиком его полЬжени , при этом ко входам блока коррекции подключены выходы датчика давлени рабочей жидкости и блока рассогласовани скоростей, а его выход соединен с входом блока пам ти положени дроссел , выход последнего блока подключен к одному входу блока управлени , к другому входу которого подсоединен выход датчика положени дроссел .The goal is achieved by the fact that the speed controller for pressing a hydraulic press, which contains the setter and speed sensor of the press plunger, is connected to the speed error unit, as well as the control unit, to the output of which, via an thyristor converter, an executive motor connected to the choke is connected working fluid flow, equipped with correction blocks and memory of the position of the throttle, as well as the pressure sensor of the working fluid and its sensor connected to the throttle, with the input m correcting unit connected outputs working fluid pressure sensor and a velocity mismatch unit and its output connected to the input of the memory position of the throttle, the last block output is connected to one input of the control unit, to the other input of which is connected the output of the throttle position sensor.

На чертеже приведена блок-схема регул тора .The drawing shows a block diagram of the regulator.

Регул тор содержит датчик 1 скорости движени плунжера пресса 2. К выходу датчика 1 скорости движени плунжера пресса подключен блок 3 рассогласовани скоростей , к которому подключен задатчик 4The controller contains a sensor 1 of the speed of movement of the plunger of the press 2. To the output of the sensor 1 of the speed of movement of the plunger of the press is connected the speed difference block 3, to which the unit 4 is connected

Claims

pressing speeds. The output of the error block 3 is connected to the first input of the correction unit 5, to the second input of which the pressure sensor 6 is connected to the working fluid installed on the press 2, and the output of the correction block 5 is connected to the input of the memory position memory block 7, which is connected to the first input of the block 8 control, to the second input of which is connected the sensor 9 of the position of the throttle connected to the throttle 10. The output of the control unit 8 is connected to the input of the thyristor converter 11, the output of which is connected to the electric motor 12 connected to the sensor 9, the throttle position set in the press 2. The controller speed compression in a hydraulic press operates as follows. During the course of the plunger 2 at the time of pressing with the speed sensor 1 associated with it, the first input of the error block 3 receives a voltage signal, the value of which is proportional to the speed of the press plunger stroke

2. To the second input of the block 3 mismatch an analog signal is received from the setpoint 4 speed. At the output of the error block 3, a signal appears, the duration of which is proportional to the magnitude of the mismatch between the target and actual speed of the press plunger. This signal is fed to the first input of the correction unit 5, to the second input of which. a series of signals from the pressure sensor 6 is supplied, the frequency of which is inversely proportional to the pressure drop across the throttle 10. At the output of the correction block 5 a set of pulses is generated, which enters the block 7. The number of pulses in the set depends on the magnitude of the error between the target and actual speeds press plunger 2 and the value of the pressure drop across the throttle 10. In block 7, the number corresponding to the actual speed of the press plunger 2 is stored at a given time. - When a set of pulses arrives from b 5 eye correction of this number varies by an amount equal to number of pulses in the set. From the output of block 7, the signal corresponding to the course of the number of pulses stored in its memory enters control block 8, which measures the magnitude of the error between this signal and the signal from the sensor, 9 throttle positions and produces a control signal proportional to this mismatch. The control signal from the output of the control unit 8 is fed to the input of the thyristor converter 11. At the output of the thyristor converter 11, a voltage appears that feeds the electric motor 12, which moves the throttle valve 10 until the error at the output of the control unit 8 becomes equal to zero. In this case, the speed of movement of the press plunger is changed in such a way that the magnitude of the mismatch between the actual and the given speed decreases or becomes equal to zero. If the mismatch value at the input of the discrepancy block 3 is not zero, then the operation of the controller occurs until the actual speed of movement of the press plunger becomes equal to the predetermined speed. The efficiency of the use of the regulator is achieved by increasing the accuracy and stability, and consequently, the quality of the press products. The invention The speed controller for pressing a hydraulic press, comprising a setter and a press plunger speed sensor, connected to a speed error unit, as well as an actuating motor connected to the throttle of the working fluid flow, connected to the output of the control unit, characterized in that increase accuracy and stability, it is equipped with blocks of correction and memory of the throttle position, as well as a pressure sensor of the working fluid and articulated with the throttle the sensor of the working fluid pressure and velocity difference block is connected to the inputs of the correction unit, and its output is connected to the input of the throttle position memory block, the output of the last block is connected to one input of the control unit, to another input of which the sensor output is connected throttle position. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 226696, cl. G 05 F 1/00, 03/18/63.

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