KR100851997B1 - Valve block for hydraulic press - Google Patents

Abstract

The present invention is to combine the hydraulic control valves for controlling the lifting and lowering of the hydraulic press in one block but fastened to be stored inside the block so as not to protrude to the outside to reduce the volume and light weight at the same time accurate operation It relates to a valve block for.

The present invention for achieving the above object is a valve block formed with a pipeline therein,

Threads are formed on the inner circumferential surface and the outer circumferential surface of the hydraulic valve to communicate with the pipeline of the valve block, characterized in that the hydraulic valve is screwed and fixed inside the valve block.

Here, the valve block is connected to the main pipe line for moving the hydraulic fluid supplied from the supply pump, the rising pipe line is connected to the main pipe line to the lower portion of the hydraulic press cylinder to raise the cylinder, the main pipe line is connected to the A lowering conduit connected to an upper portion of the hydraulic press cylinder and lowering the cylinder, a lowering control unit installed in the lowering conduit to control the flow of hydraulic oil; and a lowering control unit installed in the rising conduit to control the flow of hydraulic oil. It features.

Description

Valve block for hydraulic presses {A oil-hydraulic press valve block}

1 is a plan view showing a magnetic block for a conventional hydraulic control valve.

Figure 2 is a perspective view showing a valve block for hydraulic press in accordance with the present invention.

Figure 3 is an enlarged cross-sectional view of the main portion coupled state showing the valve block for hydraulic press according to the present invention.

Figure 4 is a view showing a control state of the valve block for hydraulic press in accordance with the present invention.

[Description of Symbols for Main Parts of Drawing]

100: valve block 101: valve coupling hole

102: pipeline 104, 107: thread

108: cylinder 110: main pipe

120: downcomer 130

140: lowering control unit 150: rising control unit

P1, P2: Pump

The present invention relates to a valve block for a hydraulic press, more specifically, the hydraulic control valves for controlling the raising and lowering of the press is coupled to one block but fastened to be received inside the block so as not to protrude to the outside to reduce the volume, The present invention relates to a valve block for a hydraulic press that enables lightweight and accurate operation.

In general, the hydraulic control valve is to control the pressure, flow rate and direction of the hydraulic fluid in order to achieve the predetermined purpose of the mechanically moving actuator.

In particular, the valve for controlling the operation of raising and lowering the hydraulic press is a press for producing a product by selectively supplying the hydraulic oil supplied from the hydraulic pump to the hydraulic cylinder by the operation of the valve and returning the hydraulic pressure of the hydraulic cylinder to the hydraulic pump again. It is used to apply.

For example, in the prior art, Korean Patent Application No. 2001-30584 "Valve Block for Lift Hydraulic Device" has been disclosed as shown in FIG. 1.

The valve block 1 for the lift hydraulic device is in communication with the discharge line of the hydraulic pump and the inlet hole 10 through which the hydraulic oil flows from the hydraulic pump, and the inlet hole 10 and the communication hole 11 through the communication. And a direct connection with the discharge hole 12 and the discharge hole 12 for supplying the hydraulic oil introduced through the inflow hole 10 to the hydraulic cylinder, and the outer periphery of the tip through hole of the cross section and the outer peripheral surface of the tip as the rod emerges. The opening and closing of the through-hole has a rectangular box shape having a valve installation hole 13 is provided with a two-way switching valve 14 to control the flow of the operating oil.

The valve block for the lift hydraulic device configured as described above blocks the communication hole between the discharge hole for discharging the hydraulic oil to the corresponding hydraulic cylinder and the corresponding inlet hole when the hydraulic pump is operated to supply the hydraulic oil to the desired hydraulic cylinder. When power is supplied to the selector valve to send an electrical signal, the selector valve opens and at the same time the tip hole is opened. At the same time, the hydraulic fluid pressurized to a predetermined pressure is discharged to the discharge hole through the open end hole. It will be able to supply the working oil.

However, a portion of the switching valve used in the valve block of the prior art is seated and fixed to the valve seat in a state of protruding to the outside, so that the valve is released from the front and rear of the switching valve to open and close the front end hole. Since it is exposed to the outside, the valve can be easily damaged by an external shock, etc., and when the valve block is transported or installed in a press, it hits a peripheral device, an object or a component, and the valve is easily broken.

In addition, since the valve protrudes to the outside, there is a problem in that the valve needs to be replaced because it is easily corroded by the environment and climate.

The present invention has been made in order to solve the above problems, the pipeline is formed in the valve block, the hydraulic valve is controlled to open and close the pipeline by manual or electrical operation to the hydraulic press cylinder to move up and down Is screwed to the valve coupling hole formed so that the valve block is in communication with the pipe line, but the structure is simplified to be fixed to the valve block in a state that the hydraulic valve is completely accommodated so as not to protrude to the outside, and the same functional effect as compared to the conventional Its purpose is to enable the use of large flow rates with a miniaturized valve block.

In addition, the valve block is made by using a light weight aluminum material, the purpose is to provide a lightweight and durable valve block.

In order to achieve the above object, the present invention provides a valve block having a conduit formed therein, a thread formed on an inner circumferential surface of a valve coupling hole formed to communicate with a conduit of the valve block, and an outer circumferential surface of the hydraulic valve, respectively. The hydraulic valve is characterized in that the screw coupling is fixed.

Here, the valve block is connected to the main pipe line for moving the hydraulic fluid supplied from the supply pump, the rising pipe line is connected to the main pipe line to the lower portion of the hydraulic press cylinder to raise the cylinder, the main pipe line is connected to the A lowering conduit connected to an upper portion of the hydraulic press cylinder and lowering the cylinder, a lowering control unit installed in the lowering conduit to regulate the flow of hydraulic oil; and a rising control unit installed in the rising conduit to control the flow of hydraulic oil. It is characterized by.

In addition, the lowering control unit is provided with a pressure regulating valve for adjusting the pressure by adjusting the supply of the operating oil when the cylinder is lowered, the first pressure control is connected to the main pipe to adjust the pressure of the operating oil supplied from the supply pump A valve is provided, and the second pressure control valve is connected to the upward passage to discharge pressure and control oil when the cylinder is lowered.

In addition, the rising control unit is characterized in that it further comprises a natural falling valve for opening the cylinder so that the hydraulic fluid supplied to the lower portion of the cylinder to freely descend freely.

The lift controller may further include a cylinder drop preventing valve for blocking the cylinder from falling downward after the cylinder rises.

In addition, there is provided a valve block for hydraulic presses made of aluminum, the valve block is provided with a main pipe for moving the hydraulic fluid supplied from the supply pump and the main pressure pipe is provided with a first pressure control unit for adjusting the pressure of the hydraulic fluid supplied; A second pressure control unit for discharging the hydraulic oil is provided, and is provided with a lowering pipe connected to the main pipe and connected to the lower portion of the hydraulic press cylinder to raise the cylinder, the lowering valve for opening and closing the rising pipe. Is provided with a descending pipe line connected to the main pipe line and connected to the hydraulic press cylinder for lowering the cylinder, provided with a rising valve for opening and closing the down pipe, and provided in the down pipe line to control the flow of hydraulic oil When the lowering of the cylinder between the lift valve and the cylinder It is provided with a pressure regulating valve for controlling the supply of hydraulic oil, is provided in the ascending pipe is provided with a rising control unit to control the flow of the hydraulic oil, between the cylinder and the lowering valve of the rising control unit is supplied to the lower portion of the cylinder It is provided with a natural falling valve for opening the hydraulic fluid to be discharged to lower the cylinder rapidly, and also characterized in that the falling prevention valve is provided to prevent the cylinder from falling to the lower side after the rise.

Hereinafter, the hydraulic press valve block according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing a hydraulic block valve block according to the present invention, Figure 3 is an enlarged cross-sectional view showing the main portion of the hydraulic press valve block according to the present invention.

2 and 3, the valve block for hydraulic press of the present invention is made of aluminum (AL) material, the valve block 100 formed in a quadrangular shape so that various hydraulic control valves can be combined into one block and unitized. Is provided.

Here, the pipeline 102 is formed in communication with each other between the valves 106 so as to raise and lower the hydraulic press cylinder 108 in the valve block 100, it is formed to communicate with the pipeline 102 The thread 104 is formed on the inner circumferential surface of the valve coupling hole 101 and the thread 107 is formed on the outer circumferential surface of the hydraulic valve 106 so that the hydraulic valve 106 communicates with the conduit 102 so that the valve block ( It is fixed by screwing to be accommodated in 100).

As described above, the valve block 100 is manufactured by using an aluminum material, and the hydraulic valve 106 is received in the valve block 100 so as to communicate with the conduit 102 so as to be screwed to fix the valve block 100. The weight of 100 is reduced, the durability is strong, and the size of the valve block 100 can be downsized, so that the valve block 100 can be easily transported or stored, and is easily and easily installed when installed in a hydraulic press. It can be installed.

Hereinafter, a description of various hydraulic valves installed on the pipeline and the pipeline formed inside the valve block of the present invention will be described with reference to FIG. 4.

4 is a view showing a control state of the valve block for hydraulic press according to the present invention.

As shown in this, the pipeline of the valve block 100 of the present invention is formed with a main pipeline 110 for moving the operating oil supplied from the supply pump provided in the outside.

Here, one supply pump may be installed and used. Preferably, the supply pump may be divided into a high pressure pump P1 for supplying hydraulic oil at high pressure and a low pressure pump P2 for supplying hydraulic oil at low pressure.

In this case, when the high pressure pump (P1) and the low pressure pump (P2) are provided, respectively, the high pressure pump (P1) and the low pressure pump (P2) are formed to be connected to the main pipe line 110 through the pipeline, respectively, The high pressure pipe (112) of the high pressure pump (P1) is provided with a first pressure control valve 113 for adjusting the high pressure of the operating oil supplied at high pressure, the low pressure pipe (114) of the low pressure pump (P2) at a low pressure. A second pressure control valve 115 for adjusting the hydraulic oil pressure is provided.

In addition, a rising line 130 is connected to the main pipe line 110 and connected to a lower portion of the hydraulic press cylinder 108 to raise the cylinder 108.

In addition, the lower pipe line 120 is connected to the main pipe line 110 and connected to the upper portion of the hydraulic press cylinder 108 to lower the cylinder 108.

In addition, the rising pipe 130 is provided with a rising control unit 150 to control the flow of the hydraulic fluid when the cylinder 108 is raised.

In addition, the falling pipe 120 is provided with a falling control unit 140 to control the flow of the hydraulic fluid when the cylinder 108 is lowered.

Here, the rising valve 130 and the falling pipe 130 and the falling pipe 120 of the falling control unit 140 is provided with a falling valve 132 and the rising valve 122, the rising pipe 130 The lowering valve 132 is installed, the lowering pipe 120 is provided with a rising valve 122.

Accordingly, when the hydraulic press cylinder 108 is to be lowered, when the lowering valve 132 of the rising pipe 130 is blocked and the rising valve 122 is opened, the working oil is lowered in the lower pipe line 120. It flows to supply the hydraulic oil to the upper portion of the cylinder 108, the cylinder 108 is lowered.

On the contrary, when the hydraulic press cylinder 108 is to be raised, when the rising valve 122 of the downward pipe line 120 is blocked and the downward valve 132 is opened, the hydraulic oil to the upward pipe line 130 is opened. Is flowed to supply the hydraulic oil to the lower portion of the cylinder 108, the cylinder 108 is raised.

At this time, the ascending speed of the cylinder 108 is increased by using the cylinder control valve 160 to turn on / off the prefill valve (not shown) of the cylinder 108 so that the cylinder 108 can rise rapidly. Will be adjusted.

That is, when the cylinder control valve 160 is opened to supply hydraulic oil in the direction of the cylinder 108, the prefill valve of the cylinder 108 opens at a high speed, so that the hydraulic oil of the cylinder 108 flows down the pipe 120. It is to be discharged to) it is possible to quickly raise the cylinder 108.

In addition, the lowering control unit 140 is provided between the cylinder 108 and the rising valve 122 is provided to adjust the supply amount of the working oil when the cylinder 108 is lowered to generate the cylinder 108 when lowering A pressure control valve 142 for adjusting the pressure is further provided.

In addition, the ascending passage 130 is provided between the cylinder 108 and the descending valve 132 to open the hydraulic oil supplied to the lower portion of the cylinder 108 so that the cylinder 108 rapidly. It is further provided with a natural falling valve 152 and the middle speed falling valve 153 to lower.

Therefore, when the natural drop valve 152 is opened when the cylinder 108 is lowered, the hydraulic oil supported by the lower part of the cylinder 108 is discharged through the natural drop valve 152, so that the cylinder 108 It is rapidly lowered by its own weight.

At this time, the natural falling valve 152 when the cylinder 108 is naturally lowered to a certain section again closes the natural falling valve 152 to block the falling by the weight of the cylinder 108 itself and the low speed by the operating oil To allow the cylinder 108 to descend.

In addition, the lift control unit 130 is installed between the cylinder 108 and the natural falling valve 152 to prevent the cylinder 108 lowering prevention valve 154 to prevent falling to the lower after the cylinder 108 is raised. ) Is further provided.

Referring to the operation relationship of the valve block for hydraulic press configured in this way is as follows.

The valve block 100 configured as described above is installed to be connected to the hydraulic press cylinder 108.

When the cylinder 108 is to be lowered after installing the valve block 100 in this way, the operation is performed by the following operation.

First, the motor (M) is driven to supply hydraulic oil to the main pipe line 110 formed inside the valve block 100 through the high pressure pump (P1) and the hydraulic oil supplied to the main pipe line 110 is the lowering It is supplied to the upper portion of the cylinder 108 through the conduit 120.

At this time, the operating oil supplied through the main pipe line 110 blocks the falling valve 132 of the rising pipe 130 and opens the rising valve 122 so that the working oil moves to the falling pipe line 120. do.

In addition, when the natural falling valve 152 is opened when the hydraulic fluid is supplied to the upper portion of the cylinder 108 to lower the cylinder 108, the hydraulic oil supporting the lower portion of the cylinder 108 is the natural falling valve. The discharge through the 152 causes the cylinder 108 to be lowered rapidly by the upper hydraulic oil and load without resistance.

When the cylinder 108 is rapidly lowered and the predetermined position, that is, the cylinder 108 is lowered, and the molds 109 reach the adjacent positions of the molds 109 to prevent the molds 109 from colliding with each other, the natural drops The valve 152 is blocked to cause the cylinder 108 to descend at low speed while preventing the cylinder 108 from descending rapidly.

In this state, after the molds 109 are lowered to contact each other, the output is increased to continuously lower the cylinder 108 by using the pressure control valve 142 to pressurize while preventing deformation of the material. The mold 109 is pressed down.

When the mold 109 is lowered in this manner, it is initially rapidly lowered and lowered at a low speed when the predetermined upper proximal position is reached. When the mold 109 comes into contact with the material, it is pressurized to continuously process the product. do.

In this way, after processing the material by the lowering of the cylinder 108, if the mold 109 is rapidly raised, since the impact caused by the rapid pressure change occurs, the mold product is damaged by the mold 109. It is preferable to rapidly raise the mold 109 upward after removing the pressing force which pressurizes the mold 109 by raising the cylinder 108 at low speed.

At this time, the rising speed of the cylinder 108 is adjusted by using the cylinder control valve 160 to turn on / off the prefill valve (not shown) of the cylinder 108 so that the cylinder 108 can rise rapidly. Done.

That is, when the cylinder control valve 160 is opened to supply hydraulic oil in the direction of the cylinder 108, the prefill valve of the cylinder 108 opens at a high speed so that the hydraulic oil of the cylinder 108 rises in the pipeline 120. It is to be discharged to) it is possible to quickly raise the cylinder 108.

Here, in the state in which the mold 109 is formed by pressing the raw material, the lowering valve of the lower pipe passage 120 while discharging the hydraulic oil pressurized from the upper portion of the cylinder 108 using the second pressure regulating valve 115. When the block 122 is opened and the lift valve 132 is opened, the hydraulic oil is supplied to the lower portion of the cylinder 108 through the riser 130 again.

When the hydraulic oil is supplied to the lower portion of the cylinder 108 while discharging the hydraulic oil positioned on the upper portion of the cylinder 108, the cylinder 108 gradually rises upward.

At this time, when supplying the hydraulic oil to the cylinder 108 through the rising pipe 130, only one high-pressure pump (P1) is operated to raise the cylinder (108).

As described above, when the mold 109 is raised at a low speed to be separated from the workpiece, the high pressure pump P1 and the low pressure pump P2 are operated simultaneously to rapidly supply the hydraulic oil to the lower portion of the cylinder 108. When the force applied from the upper portion of the cylinder 108 is removed, the cylinder 108 is raised rapidly.

In this operation, the cylinder 108 moves up and down.

That is, when the cylinder 108 descends, it descends rapidly and reaches a position close to the pore material, and then descends at a low speed. When contacted with the workpiece while descending at a low speed, pressure is continuously applied from the upper portion of the processed material. do.

At this time, the operation of the cylinder 108 allows the cylinder 108 to operate using the high pressure pump P1 and the low up pump P2.

Here, the high speed drop and the medium speed drop operates the high pressure pump P1 and the low pressure pump P2 at the same time, and during the pressure drop, only the high pressure pump P1 is operated to operate the respective cylinders by operating the respective valves. To adjust the speed.

After the product is made by continuously pressurizing the material, the cylinder 108 is raised again when the force applied from the upper portion of the cylinder 108 is removed.

At this time, in order to prevent the product from being damaged when the cylinder 108 rises while falling off the product and the mold 109, the high pressure pump P1 is operated until the product falls away from the first product to raise the product to medium speed. When completely separated from the high pressure pump (P1) and the low pressure pump (P2) to operate at the same time to allow the cylinder 108 to rise rapidly.

Thus, by repeating such operation, the cylinder 108 can be operated to produce a large amount of processed products while being safe and reducing the defective rate.

Referring to Table 1 below, the on / off relationship of each valve during cylinder operation will be described.

First, when the cylinder 108 is lowered, the high pressure pump P1 and the low pressure pump P2 are operated at the same time to supply hydraulic oil, and the first pressure regulating valve 113 and the second pressure regulating valve 115 and The intermediate speed lowering valve 153 and the lowering prevention valve 154 are opened to allow the hydraulic oil to be discharged, thereby rapidly descending by the load of the cylinder 108.

The hydraulic fluid supplied by the high pressure pump P1 and the low pressure pump P2 after the die 109 installed in the rapidly descending cylinder 108 is rapidly lowered to the proximal position of the material is passed through the lower pipe line 120. It is supplied to the upper portion of the cylinder 108, wherein the first pressure control valve 113, the second pressure control valve 115 and the rising valve 122 is opened to supply the hydraulic oil to the upper portion of the cylinder 108 and At the same time, the natural lowering valve 152 and the lowering prevention valve 154 are opened so that the hydraulic oil in the lower portion of the cylinder 108 is gradually discharged, so that the mold 109 is lowered in medium speed until it comes into contact with the processed material.

In addition, after the cylinder 108 contacts the material, the high pressure pump P1 is operated to supply hydraulic oil to the upper portion of the cylinder 108, and the first pressure regulating valve 113 and the rising valve 122 are opened. The hydraulic fluid is supplied to the upper portion of the cylinder 108 at the same time, and at the same time, the natural drop valve 152 and the drop prevention valve 154 are opened to discharge the hydraulic oil at the lower portion of the cylinder 108 while the cylinder 108 is at a low speed. Pressurize the material.

Then, after the cylinder 108 pressurizes the material at a low speed, the pressure generated by the hydraulic oil supplied to the upper portion of the cylinder 108 is removed. In this case, the high pressure pump P1 is operated to supply the hydraulic oil. However, by opening the pressure control valve 142 to discharge the hydraulic oil of the upper portion of the cylinder 108 to perform the depressurization, the cylinder 108 is raised to medium speed.

In this state, the high pressure pump P1 and the low pressure pump P2 are operated at the same time, and the lowering valve 132 and the lowering prevention valve 154 are opened so that the hydraulic oil is lowered from the cylinder 108 through the rising pipe 130. By supplying to the, by opening the pressure control valve 142 to discharge the hydraulic oil on the cylinder 108, the cylinder 108 is raised rapidly.

At this time, when the cylinder 108 is rapidly raised, the cylinder control valve 160 is opened to supply hydraulic oil to the prefill valve (not shown) of the cylinder, thereby rapidly opening the prefill valve of the cylinder 108. The hydraulic fluid supplied to the upper portion of the cylinder 108 is rapidly discharged, thereby causing the cylinder 108 to rise rapidly.

By the repetitive operation as described above, the cylinder 108 is raised and lowered to produce a product.

In the above, a preferred embodiment of the hydraulic press valve block according to the present invention has been described, but the material of the valve block is not limited to aluminum only, and all of the high-strength lightweight materials are applicable, and the present invention is not limited thereto. It is possible to carry out various modifications within the scope of the claims and the detailed description of the invention and the accompanying drawings, which also belong to the scope of the invention.

According to the present invention configured as described above, a conduit is formed in the valve block, and the conduit is controlled to be automatically opened and closed by manual or electrical operation so that the hydraulic press cylinder is mounted on the conduit formed in the valve block. It is coupled but fixed to the valve coupling hole formed so as to communicate with the pipeline of the valve block in a state that the hydraulic valve is received so as not to protrude to the outside has the effect of preventing the hydraulic valve from being damaged by the external bump and impact. .

And, the screw coupling so that the hydraulic valve is inserted into the pipeline of the valve block has the effect that can be miniaturized while showing the same functional effect.

In addition, since the valve block is manufactured using a light weight aluminum material, there is a strong weight and durability effect.

Claims (6)

There is provided a valve block formed with a pipeline therein, The valve block is provided with a main pipeline for moving the hydraulic oil supplied from the supply pump, the main pipeline is provided with a first pressure regulating valve for adjusting the pressure of the hydraulic oil supplied and a second pressure regulating valve for discharging the hydraulic oil, It is connected to the main pipe line is connected to the lower portion of the hydraulic press cylinder is provided with a rising pipe for raising the cylinder is provided with a falling prevention valve for opening and closing the rising pipe, It is provided with a control valve to allow the cylinder to rise rapidly, Is provided with a down pipe is connected to the main pipe line and connected to the hydraulic press cylinder for lowering the cylinder, opening and closing the down pipe, It is provided in the lowering pipe is provided with a lowering control unit for regulating the flow of the hydraulic fluid, the lowering control unit is provided between the rising valve and the cylinder is provided with a pressure control valve for adjusting the supply of the hydraulic fluid when the cylinder descends, It is provided in the ascending pipe is provided with a rising control unit for intermitting the flow of the hydraulic oil, between the cylinder and the lowering valve of the rising control unit is opened to discharge the operating oil supplied to the lower portion of the cylinder to allow the cylinder to descend rapidly A natural pressure drop valve is provided, and a valve block for a hydraulic press, characterized in that the lowering prevention valve is provided to prevent the lowering of the cylinder is lowered. According to claim 1, The supply pump is a high pressure pump for supplying hydraulic oil at a high pressure but having a first pressure control valve for adjusting the high pressure of the hydraulic oil; The hydraulic pressure valve block, characterized in that made of a low pressure pump having a second pressure control valve for supplying the operating oil at a low pressure to control the low pressure of the operating oil. delete delete delete delete

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