SU979033A1 - Hydraulic shears moving cross-piece control system - Google Patents

Description

(54) CONTROL SYSTEM OF MOBILE TRAILS OF HYDRAULIC SCISSORS

The invention relates to the field of metal forming and can be used in mechanical engineering. A known control system for a movable crosshead of hydraulic shears, containing leading and driven cylinders with pistons mounted therein, is connected by means of rods to a movable cross member, wherein the rod of the master cylinder is connected to the piston cavity of the slave cylinder, and the piston cavity of the leading and rod cavity the slave cylinders are connected to the yudachi highway tl3. The known system is complex in design & and unreliable. The purpose of the invention is to simplify the construction and increase the reliability by ensuring that the traverse in its original position is leveled. The goal is achieved by the fact that the control system of the movable crossbeam of hydraulic shears, containing the master and slave cylinders with pins mounted in the HEX, is connected by means of the rods with the movable crosshead, and the piston cavity of the master cylinder is connected to the piston cavity of the slave cylinder, and the piston core of the master cylinder and the rod end of the slave cylinder communicates with the supply line of the working medium, equipped with a master cylinder placed in the piston with the possibility of reciprocating moved and a glass with a plunger mounted in it, a spring installed between the plunger and the bottom of the glass, and a hole is made in the piston of the master cylinder, connected to the chain by a rod cavity with a piston through an open axial hole, filled in the plunger. On f1g. 1 shows a diagram of a control system for a movable cross-member of a hydraulic shears; in fig. 2 — node I in FIG. 1.i

The C-central control system of the movable cross member of hydraulic shears contains a driving cylinder 1, a driven cylinder 2, a rod cavity 3 of the driving cylinder 1 is connected by a pipe 4 to the piston cavity 5 of the driven cylinder 2, the piston cavity 6 of the driving cylinder 1 and the rod cavity 7 of the driven 1 cylinder 2 is connected to line 8 and 9. A piston 10 of shshderr 1 has a cup 11 embedded in which a plunger 12 is mounted for reciprocating movement. A plunger 14 is installed between the plunger 12 and the bottom 13 of the cup 11. The shaft is bored through holes 16-18 with an open axial channel 19, and through this channel through hole 20 - with a piston cavity 6. Cylinders 1 and 2 are pivotally connected to the frame 21, and their rods 22 vi 2.3 bind articulated to traverse 24. Line 8 and 9 includes a valve 25, a flow regulator 26, a check valve 27, a high pressure pump 28, a low pressure pump 29, safety relief valves 31 and 31. To stop in the upper extreme position of the cross bar 24, a sensor 32 is provided, electrically connected entered with valve 25 for switching A sensor 33, also electrically connected to the distributor 25, is mounted to reverse the crosshead. The system operates as follows. In the initial position, the mobile yoke 24 is in the extreme upper position, the spool of the distributor 25 is in the neutral position, the high-pressure pump 28 is operated to drain, and the low-pressure 29 creates a pressure in the control system. The plunger 12 rests on the cover of the cylinder 1. The piston cavity 6 and the rod end 3 of the master cylinder through the hole 20, the axial channel 19, the hole 18 and 17, the cavity 15 and the hole 16 are connected. The sensor 32 is pressed by the crosspiece 2. When the scissors is started, the spool distributes the bodies 25 and connects the high-pressure pump 28 to the piston cavity 6 of the cylinder 1, while the fluid pressure fluid flows through the main line 8 to the piston cavity 6. If in a closed volume that includes the rod cavity 3, pipe 4 and the cylinder 5 norshnevoy 5, there are no leaks, then when flow is supplied to the specified cavity 6, the yoke 24 will immediately begin to move,

down, if there are leaks, they are first compensated by filling the said enclosed volume with a stream of liquid. Fluid from line 8 enters the piston cavity,

and then through the opening 20 - f, the open channel 19, then through the openings 18 and 17, the cavity 15 and the opening 16, the liquid is directed to the brush cavity 3.

After compensation of fluid leaks in a closed volume, the traverse 24 moves downward, while the spring 14 moves the plunger 12 upwards, which overlaps with its side surface

the hole 17, and the communication of the vesicular cavity 6 with the rod cavity 3 is stopped.

When moving the crosshead 24 down the liquid from the rod end 3 cylinder 1

is displaced into the piston cavity 5 of the cylinder 2. The equality of the areas of these cavities ensures the movement of the crosspiece 24 without distortions. After the yoke 24 goes down and presses

Claims (1)

The sensor 33, the latter gives the command to switch the distributor 25, while the fluid flow is directed into the rod cavity 7 of the cylinder 2 through the check valve 27 and the flow controller 26 through the line 9. Traverse 24 moves upwards. The use of a plunger mounted in the lead piston has the advantage that in the initial position of the crosshead it compensates for leaks in a closed volume, it is completely filled with liquid, therefore the crosshead is not able to distort, which increases the reliability of the system compared to the base object, which t prototype. Claims The control system of a movable cross-bar of hydraulic shears, containing leading and driven cylinders with pistons mounted therein, connected by means of rods to a movable cross-member, wherein the stem of the master cylinder is connected to the piston cavity of the driven cylinder and the piston cavity of the leading and rod of the driven cylinders are communicated with the worker supply highway, it is known that, in order to simplify the design and increase reliability by providing the possibility of leveling Raversi in its rest position, it is provided in .razmeshenny porishe master cylinder with the possibility of reciprocating movement lostupatelnogo glass with mounted therein a plunger spring ustanovlen979 / 7 EruusGPHLPmgr I Noah between the plunger and the bottom of the glass, while in the pitch of the master cylinder there is a hole that connects the piston cavity to the piston through an open axial hole made in the plunger, Sources of information, I take into account the expertise 1. Copyright, evidence USSR NO 405670, cl. In 23 D 15/14, 1971. (prototype).