Automatic standby negative pressure tool table

Abstract

The utility model discloses an automatic standby negative pressure tool table, which relates to the technical field of die cutting processing, and comprises an upper seat body and a lower seat body which are fixedly connected, a plurality of adsorption holes are formed in the upper seat body in a penetrating manner, a vacuum cavity communicated with the adsorption holes is formed in the lower seat body, and the upper seat body and the lower seat body are fixedly connected. The side portion of the lower base body is provided with an air extraction opening communicated with the vacuum cavity, the lower base body is connected with an air pipe through the air extraction opening, the end, away from the air extraction opening, of the air pipe is connected with a vacuum pump, and a negative pressure sensor and a pressure relief switch are installed in sections of the air pipe in a series connection mode. The automatic standby negative pressure tool table can adsorb and fix a plastic adhesive film with the minimum thickness of 0.05 mm during precision assembly in the precision die cutting industry, the thickness of the plastic adhesive film is reduced, the material cost is reduced, in addition, due to the operation mode of a system, the working load of a vacuum pump is effectively reduced, the service life of the vacuum pump is prolonged, and noise of adsorption holes is effectively reduced in the working period.

Description

Technical Field

[0001] The utility model relates to the technical field of die-cutting processing, in particular to an automatic standby negative pressure tooling table. Background Art

[0002] In the die-cutting industry, there are many die-cut parts that need to be assembled and fixed to form. Most of them use low-viscosity rubber plates to assist in fixing. This assembly process has high labor costs and large amounts of auxiliary materials. There is also a vacuum adsorption fixing process. However, in most current vacuum adsorption platforms, it mainly belongs to controlling large suction force and long-time adsorption platforms (such as CN201267966Y). This process is only suitable for products with an assembly accuracy greater than 0.5 mm. The precision of precision die-cut parts is generally less than 0.1 mm. Therefore, after forming, a plastic film is used to support the bottom. And the large suction force will cause the plastic bottom-supporting film to deform, affecting the assembly precision and resulting in product defects and damage. In addition, the existing vacuum adsorption platform belongs to continuous adsorption, and the vacuum pump has to work continuously. After the work is placed, the large suction force makes it difficult to adjust the position of the product. When adjusting the position, the vacuum pump needs to be frequently started and stopped, thus shortening the service life of the vacuum pump. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides an automatic standby negative pressure tooling table, which solves the problems raised in the above background art.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: an automatic standby negative pressure tooling table, including an upper seat body and a lower seat body that are connected and fixed. A plurality of adsorption holes are penetrated and opened inside the upper seat body. A vacuum chamber is opened inside the lower seat body and is connected to the plurality of adsorption holes. An air extraction port is opened on the side of the lower seat body and is connected to the vacuum chamber. The lower seat body is connected with an air pipe through the air extraction port. One end of the air pipe away from the air extraction port is connected to a vacuum pump, and a negative pressure sensor and a pressure relief switch are respectively connected in series in the section of the air pipe.

[0005] Further, a check valve is installed inside each adsorption hole. The intake end of the check valve is flush with the upper surface of the upper seat body, and the outlet end faces the vacuum chamber.

[0006] Further, a groove is reserved and opened around the adjacent end faces of the upper seat body and the lower seat body, and a sealing ring is jointly arranged in the groove.

[0007] Further, a vacuum gauge is also connected in series in the section of the air pipe, and the vacuum gauge is located between the negative pressure sensor and the pressure relief switch.

[0008] Further, the air pipe and the air extraction port are connected and fixed through a pipe fitting.

[0009] Further, several of the adsorption holes are evenly distributed inside the upper seat body.

[0010] Further, when the negative pressure value obtained by the negative pressure sensor is less than 0.01 MPa, the power of the vacuum pump is increased until the negative pressure value of the negative pressure sensor rises and remains between 0.01 MPa and 0.02 MPa.

[0011] Further, when the negative pressure value obtained by the negative pressure sensor is greater than 0.02 MPa, the power of the vacuum pump is increased until the negative pressure value of the negative pressure sensor rises and remains between 0.03 MPa and 0.04 MPa.

[0012] The present utility model provides an automatic standby negative pressure tooling table. Compared with the prior art, it has the following beneficial effects:

[0013] During the precision assembly in the precision die-cutting industry, this automatic standby negative pressure tooling table can adsorb and fix a plastic adhesive film with a minimum thickness of 0.05 mm, reduce the thickness of the plastic adhesive film, reduce the material cost. In addition, the operation mode of the system effectively reduces the working load of the vacuum pump, extends its service life, and effectively reduces the noise of the adsorption holes during operation. Description of the Drawings

[0014] Figure 1 It is a top view of the present utility model;

[0015] Figure 2 For the present utility model Figure 1 The sectional view taken along line A-A in

[0016] In the figure: 1, upper seat body; 2, lower seat body; 3, vacuum chamber; 4, check valve; 5, air extraction port; 6, sealing ring; 7, air pipe; 8, vacuum pump; 9, negative pressure sensor; 10, vacuum gauge; 11, pressure relief switch; 12, pipe fitting. Detailed Embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figure 1 、 2, the present utility model provides a technical solution: an automatic standby negative pressure workbench, which is composed of an upper seat body 1, a lower seat body 2, a vacuum chamber 3, several one-way valves 4, an air extraction port 5, a sealing ring 6, an air pipe 7, a vacuum pump 8, a negative pressure sensor 9, a vacuum gauge 10, a pressure relief switch 11 and a pipe connector 12. Among them, the upper seat body 1 and the lower seat body 2 are fixedly connected by bolts. The vacuum chamber 3 is opened inside the lower seat body 2. Several adsorption holes are penetrated and opened inside the upper seat body 1. The several adsorption holes are all communicated with the vacuum chamber 3, and several one-way valves 4 are correspondingly installed in the adsorption holes. After installation, the air inlet end of the one-way valve 4 is flush with the upper surface of the upper seat body 1, and the air outlet end faces the vacuum chamber 3 (that is to say, gas can only enter the vacuum chamber 3 from the outside and cannot be discharged from outside the vacuum chamber 3). The air extraction port 5 is opened on the side (back) of the lower seat body 2. The air extraction port 5 is communicated with the vacuum chamber 3. The sealing ring 6 is located in the groove reserved at the adjacent ends of the upper seat body 1 and the lower seat body 2 to improve the sealing performance of the upper seat body 1 and the lower seat body 2 after fastening;

[0019] The pipe connector 12 is installed inside the air extraction port 5. Through the pipe connector 12, the air extraction port 5 is connected to the air pipe 7. The outer end of the air pipe 7 is connected to the air port of the vacuum pump 8. The negative pressure sensor 9, the vacuum gauge 10 and the pressure relief switch 11 are successively connected in series and installed on the air pipe 7;

[0020] When the automatic standby negative pressure workbench is working, the workpiece to be die-cut is placed on the upper seat body 1, and then the vacuum pump 8 extracts air. The vacuum pump 8 evacuates the inside of the vacuum chamber 3 into a negative pressure through the air pipe 7, so that the workpiece to be die-cut will be adsorbed and fixed by several one-way valves 4;

[0021] When the negative pressure value obtained by the negative pressure sensor 9 is less than 0.01 MPa, the power of the vacuum pump 8 is increased until the negative pressure value of the negative pressure sensor 9 rises and remains at 0.01 MPa to 0.02 MPa;

[0022] When the negative pressure value obtained by the negative pressure sensor 9 is greater than 0.02 MPa, the power of the vacuum pump 8 is increased until the negative pressure value of the negative pressure sensor 9 rises and remains at 0.03 MPa to 0.04 MPa

[0023] It should be noted that: the vacuum pump 8 has two working modes. One is the low-speed standby mode. When the negative pressure is less than 0.01 MPa, the vacuum pump 8 operates in a low-speed standby mode. At this time, the vacuum degree can reach 0.02 MPa after sealing the adsorption holes; the other is the normal working mode. When the negative pressure is greater than 0.02 MPa, the vacuum pump 8 enters the normal working mode. At this time, the vacuum degree after sealing the adsorption holes is between 0.03 - 0.04 MPa. While adsorbing and fixing, the protective film is not easily deformed;

[0024] For example, after the work platform is powered on, it automatically enters the "standby mode". When the rubber film covers the adsorption holes, the vacuum degree of the negative pressure sensor 9 will slowly increase from 0.01 MPa to 0.02 MPa. At this time, the vacuum pump 8 enters the "normal working mode". When the rubber film is removed, the vacuum degree of the negative pressure sensor 9 decreases. When it is less than 0.01 MPa, the vacuum pump 8 enters the "standby mode", and this cycle continues;

[0025] If it is not convenient to take away the product under negative pressure, the pressure relief switch 11 can be opened, and after the product is taken away, the pressure relief switch 11 can be closed again.

Claims

1. An automatic standby negative pressure workbench, comprising an upper seat (1) and a lower seat (2) connected and fixed, characterized in that: A plurality of adsorption holes are formed through the interior of the upper seat body (1); a vacuum chamber (3) connected to the plurality of adsorption holes is formed inside the lower seat body (2); a suction port (5) connected to the vacuum chamber (3) is formed on the side of the lower seat body (2); the lower seat body (2) is connected to an air pipe (7) via the suction port (5); an end of the air pipe (7) facing away from the suction port (5) is connected to a vacuum pump (8); and a negative pressure sensor (9) and a pressure relief switch (11) are respectively installed in series in sections of the air pipe (7).

2. The automatic standby negative pressure workbench according to claim 1, characterized in that: A one-way valve (4) is installed inside each of the adsorption holes; the air inlet end of the one-way valve (4) is flush with the upper surface of the upper seat body (1), and the air outlet end faces the vacuum chamber (3).

3. The automatic standby negative pressure workbench according to claim 1, characterized in that: A groove is reserved around the adjacent end surfaces of the upper seat body (1) and the lower seat body (2), and a sealing ring (6) is provided in the groove.

4. The automatic standby negative pressure workbench according to claim 1, characterized in that: A vacuum gauge (10) is also installed in series in the section of the air pipe (7), and the vacuum gauge (10) is located between the negative pressure sensor (9) and the pressure relief switch (11).

5. The automatic standby negative pressure workbench according to claim 1, characterized in that: The air pipe (7) and the air suction port (5) are connected and fixed via a pipe connector (12).

6. The automatic standby negative pressure workbench according to claim 1, characterized in that: A plurality of adsorption holes are evenly distributed inside the upper seat body (1).

7. The automatic standby negative pressure workbench according to claim 1, characterized in that: When the negative pressure value acquired by the negative pressure sensor (9) is less than 0.01 MPa, the power of the vacuum pump (8) is increased until the negative pressure value of the negative pressure sensor (9) increases and remains between 0.01 MPa and 0.02 MPa.

8. The automatic standby negative pressure workbench according to claim 7, characterized in that: When the negative pressure value acquired by the negative pressure sensor (9) is greater than 0.02 MPa, the power of the vacuum pump (8) is increased until the negative pressure value of the negative pressure sensor (9) increases and is maintained at 0.03 MPa to 0.04 MPa.

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