KR102132408B1 - Vacuum chuck system - Google Patents

Abstract

The present invention, a vacuum chuck for fixing the object to be processed; A compressor that generates pneumatic pressure; And a vacuum generator having a first port connected to the compressor and a second port connected to the vacuum chuck to generate a vacuum pressure in the vacuum chuck by the pneumatic pressure.

Description

Vacuum chuck system {VACUUM CHUCK SYSTEM}

The present invention relates to a vacuum chuck system for fixing an object to be processed by vacuum pressure.

In a machine tool, to process a material or object (workpiece), such as fixing it by biting a vise or fixing it with a colldt chuk, it is necessary to first fix the workpiece accurately. There are various types and types of fixtures for fixing workpieces.

As a device for fixing such a workpiece, a vacuum pump is attached to a vacuum chuck, and a method of adsorbing and fixing by driving a vacuum pump has been used.

The "Vacuum Chuck" for fixing a workpiece using a vacuum is disclosed in the Korean Utility Model Registration No. 20-0287037 (Announcement Date: August 30, 2002) in the Utility Model Gazette (Y1). In this vacuum chuck, a vacuum groove and a suction hole are formed in an upper plate for fixing a work piece, and the vacuum groove and the suction hole are connected to a vacuum valve in the valve block, and a vacuum hose connector is connected to the valve block to vacuum through the vacuum hose. The vacuum valve acts as a suction hole and the workpiece is fixed to the vacuum groove.

According to this method, since an expensive vacuum pump is used, there is a problem in that manufacturing cost increases.

The present invention has been devised to solve the above-mentioned problems, and by constructing a vacuum chuck system using a compressor that is frequently used for machine work, an expensive vacuum pump is unnecessary, thereby lowering the manufacturing cost, and a vacuum chuck system and used therefor It is intended to provide a vacuum generator.

A vacuum chuck system, which is an embodiment of the present invention devised to solve the above-mentioned problems, includes: a vacuum chuck for fixing an object to be processed; A compressor that generates pneumatic pressure; And a vacuum generator having a first port connected to the compressor and a second port connected to the vacuum chuck to generate a vacuum pressure in the vacuum chuck by the pneumatic pressure.

Here, the vacuum generator, the body forming the overall appearance, the first port and the third port are formed on the first side of the body, the second port is formed on the second side of the body; A first flow path formed in the body and connected to the first port, through which suction air flows in the vacuum chuck; And a second flow path formed in the body and connected to the second port, whereby a flow of discharge air by the pneumatic air is made and flows with one end of the first flow path.

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Here, the vacuum generator may include a pneumatic measuring gauge installed on a third side to measure the suction pressure of the first flow path.

Here, it is installed on the body, it may further include an operation module for operating the opening / closing of the second flow path.

Here, the second flow path includes a cylinder accommodating a part of the operation module, and the operation module includes: a holder formed outside the body to move up and down by an external force; A rod attached to the center of the bottom surface of the holder; The second flow path may be opened/closed according to the vertical movement of the holder, including a plunger formed on one side of the rod, accommodated in the cylinder, and provided with a through hole.

Here, the body may include a first sub-body in which the first flow path is formed; And a second sub-body formed integrally with the first sub-body and on which the manipulation module is formed.

Here, the vacuum generator may further include an ejector installed at a position where the first flow path meets the second flow path.

Here, the third port is formed at the end of the second flow path, so that the intake air and the discharge air can be discharged through it.

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According to an embodiment of the present invention having the above-described configuration, it is possible to configure a vacuum chuck system by using a compressor (compressor) possessed by most machine workshops, without having to purchase a vacuum pump including a motor separately. It is possible to increase economic efficiency by lowering the unit price.

In addition, according to an embodiment of the present invention, by installing a suction pressure gauge to measure the suction pressure on the outside of the body, it is possible to significantly reduce the size of the body, thereby lowering the manufacturing cost and inducing weight reduction.

Further, according to an embodiment of the present invention, by installing an ejector between the first flow path and the second flow path, it is possible to increase the efficiency of the vacuum generator.

1 is a view showing the overall configuration of a vacuum system according to an embodiment of the present invention.
2 is a view for explaining the configuration of a vacuum chuck in a vacuum system according to an embodiment of the present invention.
3 is a perspective view of a vacuum generator according to another embodiment of the present invention.
4 is a conceptual cross-sectional view of a vacuum generator that is another embodiment of the present invention, a view for explaining a flow path.
Figure 5 is a cross-sectional view of a vacuum generator that is another embodiment of the present invention for explaining the overall configuration of the vacuum generator.
Figure 6 is a cross-sectional view of the second body of the vacuum generator according to another embodiment of the present invention.

Hereinafter, a vacuum chuck system and a vacuum generator used therein according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this specification, the same or similar reference numerals are assigned to the same or similar configurations in different embodiments, and the description is replaced with the first description.

1 is a view showing the overall configuration of a vacuum system according to an embodiment of the present invention. As shown in Figure 1, an embodiment of the present invention vacuum chuck system (A) may be configured to include a vacuum chuck 10, a compressor 20, and a vacuum generator 30.

The vacuum chuck 10 functions to suction and fix the object to be processed. The vacuum chuck 10 will be described in more detail in FIG. 2.

The compressor 20 is called a compressor. The compressor 20 refers to a mechanical device that increases pressure by compressing a gas using electrical energy. Depending on the compression method, there are a volume-type compressor that emits a certain volume, a centrifugal compressor and an axial compressor that converts kinetic energy into pressure by applying motion to air. In the present invention, the compressor 20 is to provide high pressure discharge air to the vacuum generator 30 by generating air pressure, and various types of compressors 20 may be used.

The vacuum generator 30 is provided with a first port 311 and a second port 312, so that the first port 311 is connected to the compressor 20, and the second port 312 is connected to the vacuum chuck 10. Connected. A function of generating negative pressure using the discharge air of the compressor 20, thereby forming a negative pressure with respect to the vacuum pallet 11 of the vacuum chuck 10 so that the object to be processed is compressed and fixed by the vacuum chuck 10 Do it. The structure and operation of the vacuum generator 30 will be described in more detail with reference to FIGS. 3 to 6.

According to an embodiment of the present invention having the configuration as described above, since a vacuum chuck system can be implemented by generating a vacuum using the compressor 20 without a separate vacuum pump, it is possible to increase economic efficiency.

Hereinafter, the configuration of the vacuum chuck 10 will be described in more detail with reference to FIG. 2.

2 is a view for explaining the configuration of the vacuum chuck 10 of the vacuum system according to an embodiment of the present invention. As shown in FIG. 2, the vacuum chuck 10 is composed of a vacuum pallet 11 and a grid table 13 on which the workpiece is fixed.

In the vacuum pallet 11, as shown, a ring 115 for crimping the sealing structure is formed at the edge of the main surface, a main suction hole 113 is formed in the center, and a vacuum port 111 is formed at one side. Is formed to be connected to the vacuum generator 30 described above.

Then, on the upper surface of the grid table 13 attached to the vacuum pallet 11, as shown, grid-shaped grid grooves 131 and randomly formed suction holes 133 are formed.

The vacuum pallet 11 is provided with a hollow portion therein, and the hollow portion and the vacuum port 111 are configured to be connected. Accordingly, when a negative pressure is generated in the vacuum port 111, air in the hollow portion is sucked toward the vacuum generator 30, and a phenomenon occurs in which air is sucked from the main suction hole 113. When the grid table 13 is attached to the vacuum pallet 11, the grid table 13 is fixed by the negative pressure of the main suction hole 113. In addition, a negative pressure is generated in a narrow space formed by the lower surface of the grid table 13 and the upper surface of the vacuum pallet 11. Accordingly, sound pressure is generated in the suction hole 133 of the grid table 13.

In that state, when the user attaches the rubber ring to the grid groove 131 and then puts the object to be processed, the object to be processed is transferred to the grid table 13 by the negative pressure generated in the suction hole 133 of the grid table 13. It becomes fixed. Therefore, in consideration of the size of the workpiece, the suction hole 133 is randomly formed, and fixing of the workpiece of various sizes is made.

In FIG. 2, a vacuum chuck having two components of a vacuum pallet and a grid table has been described, but the present invention is not limited to this, and one component, that is, a vacuum of the vacuum pallet and the grid table as one component. It should be understood that chucks may be used.

Hereinafter, a vacuum generator 30 that is another embodiment of the present invention will be described in more detail with reference to FIGS. 3 to 6. First, the external appearance of the vacuum generator 30 will be described with reference to FIG. 3.

3 is a perspective view of a vacuum generator 30 that is another embodiment of the present invention. As shown, the vacuum generator 30 may include a body 31, first to third ports 311, 312, 313, a pneumatic measurement gauge 34, and an operation module 35.

The body 31 functions to form vacuum pressure (negative pressure) by forming the first flow path 32 and the second flow path 33 therein. To this end, it is made of a sturdy material that has an airtight structure and has sufficient resistance to sound pressure, and is usually made of metal. Therefore, when the size of the body 31 is increased, it becomes quite heavy.

On the other hand, a magnet (not shown) is attached to the bottom surface of the body 31 so that the vacuum generator 30 can be configured to adhere well to a work table made of steel.

On the other hand, the body 31 is a first flow path 32 is formed, the first and third ports 313, the first sub-body 310 and the operation module 35 are formed and the first sub-body ( 310) may be configured to include a second sub-body 320 is integrally coupled.

The first port 311 and the third port 313 are formed on the first side of the body 31, and the second port 312 is formed on the second side opposite to the first side. And the third side corresponding to the upper surface is configured to position the pneumatic measuring gauge 34 and the operation module 35.

Hereinafter, a flow path in the vacuum generator 30 having the above-described appearance will be described in more detail with reference to FIG. 4.

4 is a conceptual cross-sectional view of a vacuum generator 30 that is another embodiment of the present invention, and is a view for explaining a flow path. As illustrated, a first port 311 and a third port 313 are formed on the first side, and a second port 312 is formed on the second side. As described above, the second port 312 is connected to the compressor 20, and the first port 311 is connected to the vacuum chuck 10.

When the compressor 20 is operated in this state, the discharge air of the compressor 20 is configured to be discharged through the second flow path 33 to the third port 313. As described above, when high-pressure discharge air flows from the second flow path 33, a negative pressure is generated at the coupling surface between the second flow path 33 and the first flow path 32, and the vacuum chuck through the first flow path 3232 (10) The air inside is sucked. That is, negative pressure is generated in the vacuum chuck 10. Accordingly, the intake air is discharged to the third port 313 through the first flow path 32. As described above, since the intake air from the vacuum chuck 10 passes through the first flow path 32 릍, a negative pressure is generated in the vacuum chuck 10 to fix the workpiece.

In other words, the high-pressure, high-speed discharge air passes through the second flow path 33 to the third port 313, and accordingly, the low-pressure portion at the boundary point between the second flow path 33 and the first flow path 32 is generated. , Intake air flows through the first flow path 32 to the first port 311 and exits with the discharge air to the third port 313.

Hereinafter, the internal structure of the vacuum generator 30 will be described in more detail with reference to FIGS. 5 and 6.

5 is a cross-sectional view of a vacuum generator 30 that is another embodiment of the present invention, and is a view for explaining the entire configuration of the vacuum generator 30, and FIG. 6 is a second sub of the vacuum generator 30 that is another embodiment of the present invention. It is a sectional view of the body 320.

As shown in FIGS. 5 and 6, the first flow path 32 is formed of a “A”-shaped flow path, and the second flow path 33 is entirely formed of a “-” shape so that the two flow paths 32 and 33 are bodies. You will meet at the center of (31). An ejector 36 is installed at the meeting point. The ejector 36 is a kind of nozzle, and when air is ejected at a high pressure and high speed from the back side, the surrounding part is made into a low pressure part to attract fluid. That is, the ejector 36 is formed at a point where the first flow path 32 of the second flow path 33 meets, thereby forming a low-pressure portion around the high-pressure discharge air in the second flow path 33.

On the other hand, a part of the first flow path 32 is provided with a gauge 34 pin 321, and the suction pressure of the first flow path 32 is measured by the gauge 34 pin, and this is applied to the pneumatic measurement gauge 34. Will be displayed.

Meanwhile, a cylinder 331 is formed in the second sub-body 320 of the first flow path 32, and an operation module 35 is installed in the cylinder 331. Accordingly, the second flow path 33 is opened/closed by moving the operation module 35 up and down.

Referring to this in more detail with reference to Figure 6, the second sub-body 320, the cylinder 331 is formed. And this cylinder 331 is a part of the 2nd flow path 33, and is a space in which the plunger 353 of the operation module 35 is accommodated.

In addition, the operation module 35 may include a holder 351, a rod 352, and a flanger 353 having a transmission hole (opening and closing the flow path, not shown).

Holder 351 is formed on the outside of the second sub-body 320 as shown, it is configured to be held by the user by hand. The second flow path 33 is opened and closed by the upward and downward movement of the holder 351.

A rod 352 is attached to the center of the bottom surface of the holder 351, and a flanger 353 is formed at the other end of the rod 352. A transmission hole is formed in the flanger 353. The flanger 353 moves up and down inside the cylinder 331 according to the upward and downward movement of the holder 351, and accordingly, when the transmission hole and the second port 312 match, the second flow path 33 is opened. , If the transmission hole of the flanger 353 does not match the second port 312, the second flow path 33 is closed.

According to an embodiment of the present invention having the above-described configuration, it is possible to configure a vacuum chuck system by using a compressor (compressor) possessed by most machine workshops, without having to purchase a vacuum pump including a motor separately. It is possible to increase economic efficiency by lowering the unit price.

In addition, according to an embodiment of the present invention, by installing a suction pressure gauge to measure the suction pressure on the outside of the body, it is possible to significantly reduce the size of the body, thereby lowering the manufacturing cost and inducing weight reduction.

Further, according to an embodiment of the present invention, by installing an ejector between the first flow path and the second flow path, it is possible to increase the efficiency of the vacuum generator.

The above vacuum chuck system and the vacuum generator used therein are not limited to the configuration and operation of the above-described embodiments. The above embodiments may be configured such that all or part of each of the embodiments are selectively combined to make various modifications.

A: Vacuum chuck system
10: vacuum chuck
11: vacuum pallet
111: vacuum port
113: main suction hole
115: ring
13: grid table
131: grid groove
133: suction hole
20: compressor
30: vacuum generator
31: body
32: 1st Euro
33: second euro
34: pneumatic measuring gauge
35: operation module
36: ejector

Claims (10)

A vacuum chuck fixing the object to be processed;
A compressor that generates pneumatic pressure; And
It includes; a vacuum generator having a first port connected to the compressor and a second port connected to the vacuum chuck to generate a vacuum pressure in the vacuum chuck by the pneumatic;
The vacuum chuck,
A vacuum pallet having a hollow portion therein and a vacuum port connecting the hollow portion and the vacuum generator; And
Includes; grid table attached to the vacuum pallet;
The grid table,
A grid groove formed in a matrix form on an upper surface of the grid table so that the object to be processed having various sizes is fixed; And
Suction holes randomly formed in at least a portion of the plurality of rectangular protrusions defined by the grid grooves to correspond to various sizes of the object to be processed; And
A rubber ring fitted to the grid groove by a user to correspond to the size of the object; Including,
The vacuum pallet,
A main suction hole penetrating through the center and transmitting the vacuum pressure generated by the vacuum generator to the grid table in the hollow portion; And
And a ring for adsorbing the grid table when the vacuum pressure is generated along the edge of the main surface.
delete According to claim 1,
The vacuum generator,
A body forming an overall appearance, the first port and the third port are formed on the first side of the body, and the second port is formed on the second side of the body;
A first flow path formed in the body and connected to the first port, through which suction air flows in the vacuum chuck; And
A vacuum chuck system comprising a; a second flow path formed in the body and connected to the second port, through which the flow of discharge air by the pneumatic is made, and flowing through one end of the first flow path.
delete delete delete According to claim 1,
A vacuum chuck system further comprising a magnet installed on the bottom surface of the body to magnetically couple the vacuum generator to a work table made of steel. delete delete delete

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