SU618302A2 - Hydraulic press - Google Patents

Description

one

The invention relates to the processing of metals by pressure, specifically to the design of hydraulic presses.

According to the main author. St. No. 500078 is a known hydra press containing a working cylinder placed in a bed, the plunger of which is connected to the movable beam, return cylinders, the rods of which are interconnected by a beam and connected to the movable cross member, and the plungers are hollow, mounted on the rods with the possibility of an elastic axial movement and interconnected traverse, as well as hydraulic actuator and damper device installed on the line of return stroke cylinders.

With a sudden decrease in the process load caused by the separation operations at the press, the accumulated energy in the design and hydraulic system of the press is quenched due to throttling of the fluid flow from the return stroke cylinders, as well as the presence of elastic compensators in the cavities of the return stroke.

However, the amount of fluid entering the working cylinder is not adjustable. As a result, increased loads are transmitted to the press.

The aim of the invention is to improve the reliability of the press at work and its service life.

This goal is achieved due to the fact that the hydraulic press is equipped with two

5 telescopic tubes and an additional damping device, made in the form of a housing with a rotating throttle mounted in it with shaped grooves, as well as a scaffolding fixed on the throttle, a spindle and a gear rack kinematically connected to it, while the casing is mounted on a traverse fixed on hollow the plunger cylinder return stroke, and is connected by one telescopic tube with the working cylinder, and the other - with hydraulic actuator, and

15 gear rack mounted on a beam mounted on the cylinder rods return stroke.

FIG. 1 shows a press, a general view; in fig. 2 — damping device on magistrales of return cylinders; in fig. 3 - damping device on the line of the working cylinder.

The press contains frame 1, on the top

the crossbar of which is mounted worker

25 cylinder 3 and return cylinders 4.

The plunger 5 of the working cylinder and the rods of the 6 cylinders of the return stroke are connected with a movable cross-member 7. The plungers of the 8 cylinders of the return stroke are hollow, mounted on the rods 6 with the possibility of elastic axial mixing and interconnected by a cross-bar 9, and the rods are interconnected by a beam 10. Cylinders 11 with plungers 12 are fixed on the yoke 9.

The press is equipped with a damper device 13 installed on the main lines of the return stroke cylinders, as well as elastic compensators 14 mounted in the return stroke cylinders. The damper device 13 contains a telescopic tube 15, connects the cylinder cavity to the hydraulic actuator through a rotary choke 16, the body of which is fixed to the telescopic tube 15, and the drive rail 17 is connected to a movable cross member 7. In turn, the telescopic tube 15 is connected to the hollow plunger 8 the bracket 18. On the cross member 9, the body 19 of the additional damping device is mounted with a rotary choke 20 mounted therein, on whose shaft the gear wheel 21. is kinematically connected to the rack 22, mounted a bathtub on the beam 10. The housing 19 is connected to the working cylinder 3 by a telescopic tube 23, and a hydraulic actuator of the telescopic tube 24.

The press works as follows.

The downward stroke of the press is carried out when the fluid is supplied to the working cylinder 3, while the fluid from the return stroke cylinders and the cylinders 11 is discharged into the drain line. The upward stroke of the press is carried out with the supply of liquid to the cylinders 4 and 11, while the liquid from the working cylinder is discharged into the tank. With a sudden decrease in the technological load, the movable cross member 7 accelerates downward due to the accumulated energy in the compressed liquid column and deformed elements of the frame, and the pressure in the return stroke cylinders increases sharply. AT

the result is an elastic displacement of the rod 6 relative to the hollow plunger 8 and rotation of the throttles 16 and 20. In this case, the supply of fluid to the working cylinder 3 is cut off and the fluid from the cylinders is slowed down

return stroke 4, as a result of which the movement of the movable crossbar is slowed down and the accumulated energy is extinguished. At the same time, part of the accumulated energy is paid off by elastic compensators 14. After stopping the movable cross member 7

the hollow plungers 8 return to their initial position, the throttles 16 and 20 fully open, and when fluid is supplied to the cylinders 4 and cylinders 11, the movable cross member rises to its original position. This is the end of the press cycle.

Claims (1)

Invention Formula Hydraulic press according to autor. L 500078, characterized in that, in order to increase reliability in operation and service life, it is equipped with two telescopic tubes and an additional damping device, made in the form of a housing with a rotary choke mounted in it with shaped grooves, also mounted on the throttle gear and kinematically associated with her gear rack, while the body is mounted on a traverse mounted on the hollow plunger of the cylinder return stroke, and is connected by a single telescopic tube with a working cylinder indrom, and the other - with hydraulic actuator, and a gear rail mounted on a beam, fixed on the rods of the return stroke cylinders. fai.3