SU1399174A1 - Hydraulic press control system - Google Patents

Abstract

The invention relates to mechanical engineering, namely to control systems of hydraulic presses. Pel is an extension of technical capabilities. The cavities of the program-carrier power cylinder are connected via a distributor to the pump discharge line and the inlets of the actuators of the actuating cylinders. The system has a two-position distributor for connecting the cavities of the ram with a hydraulic compensator. This allows different rates of movement of the pistons of the actuating cylinders to be obtained. 1 il.

Description

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The invention relates to the field of mechanical engineering, namely to control systems of hydraulic presses.

The purpose of the invention is the expansion of technological capabilities by providing different speeds of movement of the rods of the actuating cylinders.

The drawing is a schematic diagram of the control system.

The control system comprises a ram 1, a program carrier 2 with a piston 3 and a rod 4, forming cavities 5 and 6 in its housing with unequal effective areas. Cavities 5 and 6 are connected via distributor 7 and non-return valve 8 to distributors 9 and 10 of actuating cylinders 11 and 12. The output of distributors 9 and 10 is connected via filter 13 to a hydraulic compensator 14 connected to the suction line of the pump 15, whose pressure line is connected to the inlet valve 7, on the pressure line of the pump 15, a safety valve 16 is installed. A line section between the valve 7 and the check valve 8 is connected via a two-way valve 17 to a hydraulic compensator 14. Valves 7.9,10 and 1 7 are mechanically coupled to the program carrier 2.

The control system operates as follows.

In the case of pump 15, the fluid through the distributor 7 is supplied to the cavity 5 of the cylinder 1 of the program carriers 2, and from the cavity 6 the liquid through the distributor 7, the check valve 8 and the distributor 9 of the BFJ-pressure into the non-cavity cavity of the executive cylinder 11. From the rod of the cylinder the liquid is displaced It is supplied to a hydraulic compensator 14.

At the end of the stroke of the piston of the cylinder 11, the programmers 2 switch the distributor 9 and the fluid from the cavity b of the cylinder 1 is displaced through the distributor 7, the check valve 8 and the distributor 9 into the rod cavity of the cylinder 11. Its piston moves down, expels the fluid from the head cavity in a hydraulic compensator 14.

At the end of the stroke of the piston of the cylinder 11, the program carrier 2 turns off the distributor 9, sets its spool to the middle position, and turns on the distributor 10 of the executive cylinder 12, its operation is carried out in the same sequence as the cylinder 11.

After completion of operation of the cylinder 12, the program carrier 2 turns off the dispenser 10 and turns on the on-off dispenser 17 for timing. The fluid from the cavity 6 of the cylinder 1 is displaced through the distributors 7 and 17 and the filter 13 into the hydraulic compensator 14. The time of the technological operation, for example, vulcanization, is carried out.

In the extreme upper position of the screed 3, the rod 4 switches the distributor 7. The fluid from the pump 15 enters the cavity 6 of the cylinder 1, and is displaced from the cavity 5 through the distributor 7 and 17 and the filter 13 into the hydro-compensator 14.

In the predetermined position of the piston 3, the program carrier 2 turns off the distributor 17 and the distributor 9, after which the cycle of operation repeats.

The economic effect of the implementation is achieved due to the expansion of technological capabilities.

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Claims (1)

Invention Formula A hydraulic press control system containing a pump connected to a suction line with a hydrocompensator mounted on its pressure head The Q line has a safety valve, a ram cylinder with a piston and a program carrier fixed on its rod, executive cylinders, as well as a check valve and distributors mechanically connected to the program carrier and hydraulically - with a cavity of the power and executive cylinders, characterized in that the purpose of expanding technological capabilities, by providing different speeds of movement of the rods of the actuating cylinders, it is equipped with a two-position distributor, while the distributor of the power cylinder its inlet is connected to the discharge line of the pump and the outlet through the non-return valve to the inlet distributors of actuator cylinders, and the two-way distributor is mechanically connected to the program carrier m and connected to the outlet of the distributors of actuator cylinders and the inlet to the pipeline section between check valve and distributor outlet 0 0 power cylinder. //