SU579176A1

SU579176A1 - Press control hydraulic apparatus

Info

Publication number: SU579176A1
Application number: SU7502173407A
Authority: SU
Inventors: Юрий Александрович Черников
Original assignee: Всесоюзный Научно-Исследовательский Институт Резинотехнического Машиностроения
Priority date: 1975-09-19
Filing date: 1975-09-19
Publication date: 1977-11-05

Description

Изобретение может быть использовано в машиностроении, в частности, в системе управлени прессами.The invention can be used in mechanical engineering, in particular, in a press control system.

Известна гидравлическа система управлени прессом 1, содержаща насос, св занные с ним через распределительную аппаратуру рабочие полости исполнительных гидроцилиндров и гидроцилиндр, иа штоке которого размещено программное устройство дл управлени распределительной аппаратурой.A known hydraulic control system of the press 1, comprising a pump, working cavities of the actuating hydraulic cylinders connected to it via distribution equipment, and a hydraulic cylinder, to the stock of which a software device for controlling distribution equipment is placed.

Однако осуществление надежной работы исполнительных механизмов в режиме «наладка затруднено из-за жесткого взаимодействи элементов управлени с гидрораспределител ми , не позвол ющего обеспечить перемещение плунжеров гидрораспределителей в требуемый момент времени.However, the implementation of reliable operation of the actuators in the "set-up" mode is difficult due to the rigid interaction of the control elements with the hydraulic distributors, which does not allow the movement of the hydraulic distributor plungers at the required time.

С целью повышенн надежности работы гидропривода торцовые полости исполнительных гидроцилиндров св заны с насосом системы управлени , через взаимодействующие с программным устройством гидрораспредели гели управлени , каждый из которых выполнен в виде смонтированного в корпусе подпружиненного плунжера, жестко соединенного с кнопкой управлени , и ползуна, между которы.ми установлена пружина.To improve the reliability of the hydraulic drive, the end cavities of the executive hydraulic cylinders are connected to the control system pump, control gels interacting with the program device hydraulic control valves, each of which is made up of a spring-loaded plunger rigidly connected to the control button and a slider between which are mounted in the housing. MI installed spring.

На фиг. 1 изображена принципиальна гидравлическа схема пресса; на фиг. 2 - устройство гидрораспределител управлени и главного гидрораспределител .дFIG. Figure 1 shows the basic hydraulic design of the press; in fig. 2 - the device of the hydraulic control valve and the main hydraulic distributor.

Гидропривод содержит источник питани 1, св занный с рабочими полост ми исполнительных гидроцилиндров 2, 3, распределительную аппаратуру 4-8.The hydraulic drive contains a power source 1 associated with the working cavities of the actuating cylinders 2, 3, distribution equipment 4-8.

Управление распределительной аппаратурой осуществл етс программным устройством 9, размещенным на штоке 10 гидроцилиндра П, с помощью гидрораспределителей управлени 12-17. Гидравлическа система снабжена гидробаком 18. Источником питани системы управлени служит насос 19, всасывающа лини которого сообщена с гидробаком 18. Предохранительные клапаны 20 и 21 ограничивают повышение давлени в системах сверх заданного .The switchgear is controlled by a software device 9, placed on the rod 10 of the hydraulic cylinder II, with the help of control valves 12-17. The hydraulic system is equipped with a hydraulic tank 18. The power source of the control system is a pump 19, the suction line of which is connected to the hydraulic tank 18. Safety valves 20 and 21 limit the increase in pressure in the systems beyond the specified one.

Claims

The pressure line of the power source 1 communicates with the hydraulic tank 18 via the valve 6 and the hydraulic valve 22. The copper valve is set to a pressure less than the safety valve 20, and comes into operation when the valve 6 is turned on. The valve 6 is activated when it is necessary to throttle the speed of the actuators. The hydraulic actuator also has a filter 23 .- for cleaning the hydraulic system from solids and a hydraulic valve 24 supporting the pressure in the cavity 25 and 26 of the hydraulic cylinder P. The control valve includes a plunger 28 mounted in the housing 27 with a control button 29, springs 30, 31 and g (Alsun 32. The stiffness of the spring 31 is greater than the spring 30. The main hydraulic valve, for example hydraulic cylinder 2, consists of body 33, plunger 34, spring 35 and washer 36. The press control system works as follows. Actually, 9, the piston 10 with the piston of the hydraulic cylinder 11 is in a position close to the extreme lower. The distributor 4 has not yet been switched. The pump 19 is switched on. When the power source 1 is turned on, the liquid from the piston cavity of the hydraulic cylinder 11 is fed through a safety valve 20, filter 23 and the valve 4 into the throat cavity of the cylinder 11. The rod 10 with the software device 9 moves down and switches the switchgear 4 and the control valve 16. The fluid through the valves 4 and 7 according to steps from the rod end of the hydraulic cylinder 11 into the piston cavity of the hydraulic cylinder

2. The fluid is displaced from the rod cavity of this hydraulic cylinder through the hydraulic distributors 7 and 4 into the non-stem cavity of the hydraulic cylinder 11. The rod 10 with the programming device 9 rises. After the piston of the hydraulic cylinder 2 makes a working (idle) stroke, the displaced fluid from it will move the rod 10 and the software device 9 to the specified position. The hydraulic valve 16 is turned off and the hydraulic valve 14 is turned on. The hydraulic cylinder enters into operation.

3. In the periods when the hydraulic cylinders 2 and 3 do not work, the discharge valve 5, the control valve 12, and the liquid from the power source 1 through the valves 5 and 4 enter the hydrocyliidr II. Software device 9 does not interact with the control valves at this time. 64 To provide different speeds for any actuator, control hydraulic valve 13 and hydraulic valve 6 are turned on. Liquid, which has not entered the hydraulic actuator cylinder, is discharged through hydraulic valve 6 and hydraulic valve 22 into hydraulic tank 18. In the "adjustment mode, the system is operated using the control button 29. When it is pressed, one of the end cavities, for example, the hydraulic distributor 7, communicates with the hydraulic tank and the hydraulic cylinder 2 makes a working (idle) stroke. The design of the hydraulic control valve. It does not allow to ensure the operation of the hydraulic cylinder both when the copier of the software device acts on it, as well as when it is not available. The presence of the spring 30 in the control hydraulic distributor provides communication of the end cavity of its plunger with the hydraulic tank at a position when the copier does not act on the slider 32. In addition, by pulling the button 29 from the control hydraulic distributor, pressure is supplied to the hydraulic distributor end cavity and the specified movement of the actuator. Claims Hydraulic press control system comprising a pump, working cavities of executive hydraulic cylinders and a hydraulic cylinder connected to it via distributing equipment, and a hydraulic device for controlling distributing equipment on the rod of which, in order to increase the reliability of hydraulic actuator operation, end cavities actuating hydraulic cylinders are connected to the pump control systems through the hydrodistributor control interacting with the software device and each of which is designed as a spring-mounted plunger mounted in the housing, rigidly connected to the press control button, and a slide between which a spring is mounted. . Sources of information taken into account in the examination: 1. USSR Author's Certificate No. 473623, cl. B 30 B 15/20, 1974.

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