SU1245416A1 - Apparatus for cutting rolled stock by shear technique - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used in mechanical engineering for non-waste cutting of rolled products into dimensional workpieces.

The purpose of the invention is the expansion of technological capabilities by increasing the diameter of the rolled steel without increasing the power of the hydraulic drive. .

The drawing shows the structure of the device for cutting the car by the shear method.

Hydraulic cylinders with pressurized cavities 6 and 7 and cavities 8 and 9 of drain are placed on the frame 1, which are located in the housing 2 and divided by a partition 3, the first 4 and second 5, and the rods 10 and 11, respectively, and the stem 10 is fixed on the rod 10 of the hydraulic cylinder 4 a knife 1 2, a hydraulic cylinder 13 pressing with a cavity of pressure 14 and a drain 15, on a rod 16 of which a clamping knife 17 is fixed, a hydraulic cylinder 18 of a clamp with cavities: pressure 19 and a drain 20, on a rod 21 of which a clamping knife 22 is fixed, as well as a fixed knife 23.

The pressure cavities 6 and 19 of the hydraulic cylinders 4 and 18 are connected by a hydroline 24 located at the outlet of the apparatus 25, the hydraulic equipment for regulating the pressure and the sequence of operation of the hydraulic cylinders, including a pressure valve, the control cavity of which is connected by hydroline 26 to the hydrodynamic 27, and a check valve whose inlet is connected with hydroline 28, which in turn is connected with hydroline 29 with the entrance to the apparatus 30 of the hydraulic equipment for pressure control and the sequence of operation of hydraulic cylinders, including a check valve and pressure gold The control cavity of which is connected to the hydroline 24 by the hydroline 31, the outlet of which through the hydroline 32 is connected to the pressure cavity 7 of the hydraulic cylinder 5. The drain cavity 8 of the hydraulic cylinder 4 through the hydraulic line 26 an apparatus 33 with a pressure slide, the control cavity of which is connected to the hydraulic line 26, and a check valve and hydroline 34 is connected to hydroline 35, which is also connected to the drain cavity 20 of the hydraulic cylinders 18. The drain cavities of the hydraulic cylinders 5 and 13 are permanently connected to the drain through the hydrolines 36 and 37. The hydraulic lines 28 and 35 are connected to the outlet the house of the control reversing distributor 38 (for example, three-position), which in the working position a connects the hydroline 28 to the pressure line 39 and the hydroline 35 to the drain line 40, in the position S connects the hydroline 28 to the line 40

the drain and the hydroline 35 with the pressure line 39, and in the position b the hydraulic lines 28 and 35 overlap and connects the pressure line 39 to the drain line 40. The pressure line 39 is connected to the outlet in: the pump 41 by the safety valve 42 and the pressure cavity 14 of the hydraulic cylinder 13 through the hydraulic line 43,

The device for cutting the car by the shift method works as follows.

In the initial position, the piston 44 of the hydraulic cylinder 13 is compressed by the pressure of the pump 41 and stands on a hard stop

45, while the gland knife 17 is flush with the fixed knife 23, and the pistons of the hydraulic cylinders 4, 5 and 18 are injected. in the leftmost position. Knives divorced. The distributor 38 is in the neutral position b. The pump 41 through hydraulic lines 39 and 40 and the distributor 38 pumps the working fluid into the tank ..

In the working position, the electromagnet 46 is turned off, the electromagnet 47 is turned on and moves the distributor 38 to position a. Fluid from pump 41 through pressure line 39 through distributor 38, hydraulic line 28, machine check valve 25 and hydraulic line 24 enters the pressure cavities 19 and 6 hyg; cylinder 18 and 4 "Hydraulic cylinder 18, moving knife 22, clamps the cut bar 48, it to the fixed knife 23. During the movement, the oil from its drain cavity 20, along the lines 35 and 40, is discharged through the distributor 38 into the tank. After the bar is clamped in the blades 22 and 23, when the pressure in the pressure cavity 6 is increased, the stem 10 begins to split with the knife 12 of the hydraulic cylinder 4 before the rod is clamped in the blades 12 and 17. The fluid from the drain cavity 8 through the hydraulic line 26 is displaced at the pressure setting of the pressure slide of apparatus 33 34, 35 and 40, and is drained into the tank.

The adjustment of the apparatus 33 ensures the sequence of operation of the hydraulic cylinder 4 after the hydraulic cylinder 18. After clamping the cut bar in the four-blade knives, the pressure in cavities 6 and 19 grows even with bar diameters less than 0.5 of the nominal hydraulic cylinder 4, overcoming the cutting force and resistance of the hydraulic cylinder 13, with a knife 12 makes a cut. The liquid from the cavity 14 of the hydraulic cylinder 13 is displaced through the hydraulic line 43 and in the line 39 of the pressure is summed with the flow rate of the pump 41.

With an increase in the diameter of the cut-ts valve device 33 and hydroline 26 - in

The rolled force of the hydraulic cylinder 4 is not enough for cutting. When pressure is reached in the cavity -6 and the hydroline 31 values equal to the setting

of the pressure valve of apparatus 30, it opens and the liquid through it from the pressure hydrodynamic line 28 goes along hydraulic lines 29 and 32 into the pressure chamber 7 of the hydraulic cylinder 5. When the hydraulic cylinder 5 moves, its rod 11 reduces the volume of the cylinder 6 of the hydraulic cylinder 4, in which pressure is rising. The check valve of apparatus 25, connected to cavity 6 by hydroline 24, closes when. the pressure in the cavity 6 will exceed the pressure of the pump 41. In this case, the hydraulic cylinders 4 and 5 operate in the multiplication mode. The pressure in cavity 6 increases to the value required for cutting the bar. Simultaneously with an increase in pressure in cavity 6, pressure in cavity 19 of hydraulic cylinder 18 increases, reinforcing the bar clamp in knives 22 and 23, which prevents the bar from bending and improves the cut quality.

The cylinders 4 and 5 can work simultaneously, when the pressure slide of apparatus 30 is set to their idle pressure, while the fluid from the hydraulic line 28 enters simultaneously into the pressure cavities 6

and 7 hydraulic cylinders 4 and 5, the rod 1 1 rests on the piston of the hydraulic cylinder 4 and the forces of the hydraulic cylinders when cutting are added.

For the knives, the electromagnet 47 is turned off and the electromagnet 46 is turned on, moving the valve 38 to the position o, Liquid from the pressure line 39 through the valve 38 and the hydraulic line 35 enters the drain cavity 20 of the hydraulic cylinder 18 and at the same time from the hydraulic line 35 through the hydraulic line 34 through reverse with

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Hydraulic cylinder discharge cavity 8 4. When pressure is increased in cavities 20 and 8, the pressure valve of apparatus 25, which is controlled from hydraulic lines 27 and 26, opens and fluid is drained from cavities 19 and 6 through hydraulic line 24, through pressure valve of apparatus 25, hydraulic line 28, the distributor 38 and the hydroline 40. The knives 12 and 22 are returned to their original position. If the hydraulic cylinder 5 participated in the cutting and was at the end of the working stroke, then the piston of the hydraulic cylinder 4 through the rod 11 returns it to its original position. In this case, the fluid from the cavity 7 through the hydroline 32, the non-return valve of the apparatus 30 and the hydraulic lines 29 and 28 is forced out to the drain. When the removal of the knife 12 cylinder 13 returns the knife 17 to its original position. When the removal of the knife 12, the hydraulic cylinder 13 reaches the stop 45, returning to the initial position the knife 17, as well as the cut piece, to the axis of the bar to be cut. After the bar is fed, the workpiece is pushed out of the cutting area and the cycle is repeated. In order to limit the pressure above a predetermined value, a safety valve 42 is used, which, when this pressure is reached, pours liquid from the pump into the tank.

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Editor C, Baker

Compiled by, Morozov

Tehred V. Kadar Proof-reader S. Cherni

Order 3946/8 Circulation 1001. Subscription

VNSHSHI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

1. DEVICE FOR CUTTING RENTAL BY THE SHIFT METHOD, comprising a bed with a fixed knife fixed on it, two hydraulic cylinders connected in series to the pump pressure line, a rod with a cutting knife, and hydraulic equipment for controlling the pressure in the pressure cavities of the hydraulic cylinders and for control the sequence of their work, which consists in the fact that, in order to expand the technological capabilities of the device by increasing the diameter of cut steel without increasing the hydraulic drive power, apparatus for controlling the cause of the pressure led to pressure chambers of hydraulic cylinders and to control the sequence of their operation is designed as a pressure valve and the check valve, the inputs of which ^- svya-? are connected with each other and with the pump pressure line, and the outputs are with the pressure cavity of the second and first hydraulic cylinders, respectively, while the pressure control valve cavity is connected to the pressure cavity of the first hydraulic cylinder, the hydraulic cylinders are made with separate rods, one of which is connected to the cutting knife with the piston of the first hydraulic cylinder, and connect the other rod to the piston of the second hydraulic cylinder and installed with the possibility of interaction with the piston of the first hydraulic cylinder in its pressure cavity. 2. The device according to π. 1, it is obvious that it is equipped with additional hydraulic cylinders for clamping the rolled products and pressing the cut-off part of the rolled products, while the pressure cavity of the hydraulic cylinder of the clamp is connected to the pressure cavity of the first hydraulic cylinder, and the pressure cavity of the compression cylinder is connected to the pressure line of the pump. SU „1245416 1245416 '2