SU371090A1 - HYDRAULIC PRESS MANAGEMENT SYSTEM - Google Patents

Description

one

This invention relates to the field of metal forming.

A hydraulic press control system is known that contains a hydraulic cylinder with a piston, which is connected via a controlled distribution valve to a power source, as well as a pressure relief valve and a pressure regulating mechanism in the system with an actuator.

However, in this control system, the fixed position of the unloading safety valve is maintained by the hand of the operator.

In order to implement smooth and stepless pressure control and its automatic fixation in the proposed system, the pressure control mechanism is made in the form of a spool valve connected on one side via a throttle and actuator to a relief / safety valve, and on the other hand additional power source provided in the system. In this case, the actuator of the pressure control mechanism is made in the form of a chamber with a diaphragm and a pusher fixed on it, interacting with the spring of the relief-relief valve.

The drawing shows the proposed control system.

The hydraulic press control system contains a hydraulic cylinder 1 with a piston connected to the power source 2 with pipes 3-5 through the distribution spool 6, as well as a relief valve 7. The spring of the valve 7 interacts with the pusher 8 fixed on the diaphragm 9 bounding the chamber 10. Start button and adjustment mechanism

pressure in the system. made in the form of spool valves 11 and 12, connected in series by pipeline 13. Air is supplied to them from the pneumatic line 14. From the valve // air is supplied through the pipeline 13

under the end of the distribution spool 6, and from valve 12, through throttle 15 and pipe 16, air is supplied to chamber W. Pipelines 13 liters 16 are connected through a check valve 17.

The control system of the hydraulic press works as follows.

When valve 11 is triggered, air from the pneumatic line 14 flows through pipe 13 to the end of distribution valve 5 and valve 12. Distribution valve 6 switches to the left position, and the working fluid from power supply 2 through pipelines 3 and 5 enters cylinder 1. Idle way down. When a part is reached, the cylinder rod / stops, as the safety relief

“Valve 7 is designed for minimum pressure. In order to carry out the necessary deformation, the operator acts on valve 12 and the air from pipe 13 through throttle 15 and conduit 16 enters chamber 10. As air enters the chamber, diaphragm 9 moves to the left together with a pusher 8 fixed to it. compresses the spring by changing the setting of the relief safety valve 7. When the required deformation is reached, the operator stops acting on the valve 12, the air stops flowing into the chamber 10, and the pusher 8 stops, occupying a fixed position e position necessary to maintain the target pressure. To make the valve move upwards, the valve // is lowered, and the end of the distribution valve 6 through the pipe 13 and the valve //, as well as the chamber 10 through the pipe 16, the check valve 17, the pipe 13., And the valve // are connected to the atmosphere.

In this case, the spring of the relief safety valve 7 returns to its original position, and the distribution valve 6, under the action of its spring, moves to the right position, and the working fluid from the power source 2 through pipelines 3 and 4 enters the lower cavity of the cylinder

Subject invention

Claims (2)

1. A hydraulic press control system comprising a hydraulic cylinder with a piston connected through a controlled distribution spool to a power source, as well as a pressure relief valve and a pressure regulating system in the system with an actuator, characterized in that and stepless pressure control and its automatic fixation, the pressure control mechanism in the system is designed as a spool valve connected to one side through a throttle and will perform A dedicated body with a safety relief valve, and on the other hand, through the control valve of the distribution valve with an additional power source provided in the system. 2. The hydraulic press control system according to claim 1, characterized in that the actuator of the mechanism is regulated and the pressure is made in the form of a chamber with an aperture and a pusher fixed on it interacting with the spring of the relief valve.