An air path switching device

Abstract

The utility model relates to a kind of gas circuit switching device, including base, briquetting, mounting seat, air pipe, sliding sleeve, spring, base side wall is equipped with suction pipe, briquetting bottom surface is equipped with slot, briquetting one end is equipped with the suction hole being communicated with slot, mounting seat fixed frame is set in base top, air pipe is fixed and is set on mounting seat, air pipe one end passes through mounting seat and is inserted with slot and is inserted into cooperation, air pipe other end passes through mounting seat and is communicated with suction pipe by communicating pipe, sliding sleeve sliding sleeve is set on the air pipe between briquetting and mounting seat and with briquetting abutment cooperation, spring both ends are fixedly connected with mounting seat and sliding sleeve bottom respectively, the side wall of one end of air pipe insertion cavity is equipped with the air hole being communicated with air pipe hole hole.The utility model has the beneficial effect that in the process of dismounting vacuum milling clamp tooling, the automatic switching of suction pipeline opening and closing can be realized, and then the vacuum adsorption operation to part is more convenient and fast, and work efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of parts processing equipment, and specifically relates to an air path switching device. Background Technology

[0002] Existing aerospace aluminum parts are mostly square blocks with a web cavity structure, exhibiting a wide variety and small batch sizes. When milling aluminum parts, a milling clamp is required to hold and fix the parts, and then the clamp and parts are transferred together to the machine tool for processing. Besides mechanical clamping, aerospace aluminum parts can also be clamped using vacuum adsorption, which creates a vacuum within the web cavity of the part through air extraction, thereby adsorbing and fixing the part. Ordinary vacuum milling clamps have valves installed on the pipes connecting to external air extraction equipment (such as vacuum pumps). When clamping parts, the valves must be closed first, and after the vacuum milling clamp is installed on the machine tool table, the parts are placed on the clamp, and then the valves are opened again to create a vacuum. This overall operation is cumbersome and inefficient. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a gas path switching device that can automatically switch the opening and closing of the air extraction pipeline during the disassembly and assembly of vacuum milling clamps, thereby making the vacuum adsorption operation of parts more convenient and faster and improving work efficiency.

[0004] The objective of this utility model is achieved through the following technical solution: A pneumatic switching device includes a base, a pressure block, a mounting base, a vent pipe, a sliding sleeve, and a spring. The base is mounted on the worktable of a machine tool, and an air extraction pipe is provided on the side wall of the base. The pressure block is located at the bottom of the tooling table of a vacuum milling fixture, and a slot is provided on the bottom surface of the pressure block. One end of the pressure block has an air extraction hole communicating with the slot. The mounting base is fixedly mounted on the top of the base. The vent pipe is fixedly inserted through the mounting base, with one end passing through the mounting base and engaging with the slot, and the other end passing through the mounting base and communicating with the air extraction pipe through a connecting pipe. The sliding sleeve is slidably fitted on the vent pipe between the pressure block and the mounting base and abuts against the pressure block. The spring is fitted on the vent pipe between the sliding sleeve and the mounting base, with both ends of the spring fixedly connected to the mounting base and the bottom of the sliding sleeve, respectively. The side wall of the end of the vent pipe inserted into the slot has an air extraction hole communicating with the vent pipe hole.

[0005] Furthermore, the base has a cavity, the air extraction pipe is connected to the cavity, and the top surface of the base has an installation hole that is connected to the cavity. The two ends of the connecting pipe are connected to the installation hole and the air pipe, respectively.

[0006] Furthermore, the end of the vent pipe that is inserted into the slot is provided with a limiting block to limit the movement of the sliding sleeve.

[0007] Furthermore, the top surface of the mounting base is provided with a groove, through which the vent pipe passes and is inserted into the slot, and the two ends of the spring are fixedly connected to the bottom of the groove and the bottom of the sliding sleeve, respectively.

[0008] Furthermore, a first sealing ring is fitted on the vent pipe above and below the vent hole, which abuts against the inner wall of the sliding sleeve.

[0009] Furthermore, a second sealing ring is embedded around the vent pipe on the top surface of the sliding sleeve, which abuts against the bottom surface of the pressure block.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model, through the arrangement of a base, pressure block, mounting base, vent pipe, sliding sleeve, and spring, allows the workpiece table with the workpiece placed on the machine tool's worktable. The pressure block presses down on the sliding sleeve, exposing the vent hole on the vent pipe. The spring is compressed, and simultaneously, the vent pipe inserts into a slot on the pressure block, connecting the vent hole to the slot. This connects the suction hole on the pressure block to an external suction device, enabling vacuum adsorption of the workpiece. When the workpiece table is removed, the spring's restoring force pushes the sliding sleeve upwards along the vent pipe until it blocks the vent hole, disconnecting the suction hole from the external suction device. Finally, the automatic switching of the suction pipe's opening and closing is achieved during the assembly and disassembly of the workpiece table, making the vacuum adsorption operation of the workpiece more convenient and faster, thus improving work efficiency. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the overall structure of this utility model; Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the diagram.

[0012] In the diagram: 1. Base; 2. Pressure block; 3. Mounting seat; 4. Vent pipe; 5. Sliding sleeve; 6. Spring; 7. Suction pipe; 8. Slot; 9. Suction hole; 10. Connecting pipe; 11. Vent hole; 12. Cavity; 13. Mounting hole; 14. Limiting block; 15. Groove; 16. First sealing ring; 17. Second sealing ring. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0014] like Figures 1-3As shown, a pneumatic switching device includes a base 1, a pressure block 2, a mounting base 3, a vent pipe 4, a sliding sleeve 5, and a spring 6. The base 1 is bolted to the machine tool's worktable. A suction pipe 7 is installed on the side wall of the base 1 for connecting to an external suction device. The pressure block 2 is bolted to the bottom of the fixture table of a vacuum milling clamp. The bottom surface of the pressure block 2 has a slot 8, and one end of the pressure block 2 has a suction hole 9 communicating with the slot 8. A suction pipe on the fixture table is connected to the suction hole 9. The mounting base 3 is fixedly mounted on the top of the base 1, and the vent pipe 4 is fixedly inserted through the mounting base 3. One end of the vent pipe 4 passes through… The vent pipe 4 passes through the mounting base 3 and is inserted into the slot 8. The other end of the vent pipe 4 passes through the mounting base 3 and is connected to the suction pipe 7 through the connecting pipe 10. The sliding sleeve 5 is slidably sleeved on the vent pipe 4 between the pressure block 2 and the mounting base 3 and abuts against the pressure block 2. The spring 6 is sleeved on the vent pipe 4 between the sliding sleeve 5 and the mounting base 3. The two ends of the spring 6 are fixedly connected to the bottom of the mounting base 3 and the sliding sleeve 5, respectively. The side wall of the end of the vent pipe 4 that is inserted into the slot 8 is provided with a vent hole 11 that communicates with the pipe hole of the vent pipe 4.

[0015] When the sliding sleeve 5 slides on the vent pipe 4, it can block or open the vent hole 11, thus disconnecting or connecting the vent hole 11 with the slot 8. Specifically, when the tooling table with the part placed is placed on the machine tool's worktable, the pressure block 2 presses down on the sliding sleeve 5 to expose the vent hole 11, compressing the spring 6. At the same time, the vent pipe 4 is inserted into the slot 8, connecting the vent hole 11 with the slot 8, thereby connecting the extraction hole 9 with the external extraction equipment. Then, the external extraction equipment can be used to extract air, achieving vacuum adsorption of the part. When the tooling table is removed, under the restoring force of the spring 6, the spring 6 pushes the sliding sleeve 5 to slide up along the vent pipe 4 until it blocks the vent hole 11, thus disconnecting the extraction hole 9 from the external extraction equipment. Finally, the automatic switching of the opening and closing of the extraction pipe 7 is achieved during the disassembly and assembly of the tooling table.

[0016] like Figure 2 As shown, the base 1 has a cavity 12 inside, the air extraction pipe 7 is connected to the cavity 12, the top surface of the base 1 has a mounting hole 13 connected to the cavity 12, and the two ends of the connecting pipe 10 are connected to the mounting hole 13 and the air pipe 4 respectively.

[0017] like Figure 2 , Figure 3 As shown, the end of the vent pipe 4 that is inserted into the slot 8 is provided with a limiting block 14 to limit the sliding sleeve 5. The limiting block 14 is integrally formed with the vent pipe 4. When the spring 6 pushes the sliding sleeve 5 to block the vent hole 11, the sliding sleeve 5 abuts against the limiting block 14, thereby limiting the abutment of the sliding sleeve 5 by the limiting block 14 to prevent the sliding sleeve 5 from disengaging from the vent pipe 4.

[0018] like Figure 2As shown, in order to ensure that the spring 6 has sufficient extension and retraction stroke, a groove 15 is provided on the top surface of the mounting base 3. The vent pipe 4 passes through the groove 15 and is inserted into the slot 8. The two ends of the spring 6 are fixedly connected to the bottom of the groove 15 and the bottom of the sliding sleeve 5, respectively.

[0019] like Figure 3 As shown, to ensure the airtightness of the automatic air connector, a first sealing ring 16 is fitted on the air pipe 4 above and below the air hole 11, abutting against the inner wall of the sliding sleeve 5. Simultaneously, a second sealing ring 17 is embedded around the top surface of the sliding sleeve 5, abutting against the bottom surface of the pressure block 2. When the sliding sleeve 5 blocks the air hole 11, the first sealing ring 16 and the second sealing ring 17 abut against the inner wall of the sliding sleeve 5, thus sealing the air hole 11. After the pressure block 2 presses down on the sliding sleeve 5 to connect the suction hole 9 with the external suction equipment, the second sealing ring 17 ensures the airtightness between the pressure block 2 and the sliding sleeve 5, thus preventing air leakage during suction.

[0020] The air path switching device of this utility model can realize the automatic switching of the opening and closing of the 7 air extraction pipes between the vacuum milling clamping fixture and the external air extraction equipment, thereby making the vacuum adsorption operation of parts more convenient and faster, and improving work efficiency.

[0021] Finally, although embodiments of the present invention have been shown and described above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas path switching device, characterized in that: The assembly includes a base (1), a pressure block (2), a mounting base (3), a vent pipe (4), a sliding sleeve (5), and a spring (6). The base (1) is placed on the worktable of the machine tool, and an air extraction pipe (7) is provided on the side wall of the base (1). The pressure block (2) is placed at the bottom of the tooling table of the vacuum milling fixture, and a slot (8) is provided on the bottom surface of the pressure block (2). One end of the pressure block (2) is provided with an air extraction hole (9) that communicates with the slot (8). The mounting base (3) is fixedly mounted on the top of the base (1), and the vent pipe (4) is fixedly installed on the mounting base (3). One end of the vent pipe (4) passes through the mounting base (3) and connects with the slot. (8) Insertion and connection, the other end of the vent pipe (4) passes through the mounting base (3) and is connected to the suction pipe (7) through the connecting pipe (10), the sliding sleeve (5) is slidably sleeved on the vent pipe (4) between the pressure block (2) and the mounting base (3) and abuts against the pressure block (2), the spring (6) is sleeved on the vent pipe (4) between the sliding sleeve (5) and the mounting base (3), the two ends of the spring (6) are fixedly connected to the mounting base (3) and the bottom of the sliding sleeve (5) respectively, and the side wall of the vent pipe (4) inserted into the slot (8) is provided with a vent hole (11) that communicates with the pipe hole of the vent pipe (4).

2. The gas path switching device according to claim 1, characterized in that: The base (1) has a cavity (12) inside, and the air extraction pipe (7) is connected to the cavity (12). The top surface of the base (1) has an installation hole (13) connected to the cavity (12), and the two ends of the connecting pipe (10) are connected to the installation hole (13) and the air pipe (4) respectively.

3. The gas path switching device according to claim 1, characterized in that: The end of the vent pipe (4) that is inserted into the slot (8) is provided with a limiting block (14) to limit the sliding sleeve (5).

4. The gas path switching device according to claim 1, characterized in that: The mounting base (3) has a groove (15) on its top surface. The vent pipe (4) passes through the groove (15) and is inserted into the slot (8). The two ends of the spring (6) are fixedly connected to the bottom of the groove (15) and the bottom of the sliding sleeve (5) respectively.

5. The gas path switching device according to claim 1, characterized in that: The vent pipe (4) is fitted with a first sealing ring (16) that abuts against the inner wall of the sliding sleeve (5) both above and below the vent hole (11).

6. The gas path switching device according to claim 1, characterized in that: The top surface of the sliding sleeve (5) is surrounded by the vent pipe (4) and is fitted with a second sealing ring (17) that abuts against the bottom surface of the pressure block (2).

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