A vacuum milling fixture with an air path switching device

Abstract

This utility model relates to a vacuum milling clamping fixture with an air path switching device, including a fixture table, support columns, suction cup pads, an automatic air path connector, and a zero-point positioner. Multiple support columns are located at the bottom of the fixture table, and the bottom of the fixture table is detachably connected to the top of the support columns via the zero-point positioner. A rectangular array of suction cup pads is located on the top of the fixture table, which interlock with the web cavity at the bottom of the workpiece. Multiple through holes are provided on the fixture table, and suction nozzles are connected to the bottom of the suction cup pads through these through holes. The multiple suction nozzles are connected by an air extraction pipe. The automatic air path connector is located at the center of the bottom at both ends of the fixture table, and the air extraction pipe is connected to the automatic air path connector. The advantages of this utility model are: it clamps and fixes parts using vacuum adsorption, which is convenient, quick, and efficient, and applicable to different types of aerospace aluminum parts, exhibiting good versatility.

Description

Technical Field

[0001] This utility model belongs to the technical field of parts processing equipment, specifically relating to a vacuum milling clamping fixture with an air path switching device. Background Technology

[0002] Most existing aerospace aluminum parts are square blanks with web-cavity structures, exhibiting a wide variety and small batch sizes. To improve processing efficiency during milling, the front side is typically machined first. After this, an AGV forklift removes the tooling and parts from the machine tool to a centralized loading and unloading area. The AGV forklift then moves to a material rack, transporting another set of clamped tooling and parts to the machine tool for further processing. Therefore, the parts need to be clamped before being transported to the material rack by the AGV forklift. The existing clamping method involves positioning the blank on the milling clamping table and then using specialized clamping tools on the tooling to hold and fix the parts. This clamping process is cumbersome and inefficient. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a vacuum milling clamping fixture with an air path switching device. It clamps and fixes parts by vacuum adsorption, which is convenient, quick and efficient, and applicable to different types of aerospace aluminum parts, with good versatility.

[0004] The objective of this utility model is achieved through the following technical solution: A vacuum milling clamping fixture with an air path switching device includes a fixture table, support columns, suction cup pads, an automatic air path connector, and a zero-point positioner. Multiple support columns are located at the bottom of the fixture table, and the bottom of the fixture table is detachably connected to the top of the support columns via the zero-point positioner. Multiple positioning blocks are sequentially arranged along adjacent sides of the top surface of the fixture table. A rectangular array of suction cup pads is located on the top of the fixture table, each capable of interlocking with the web cavity at the bottom of the part. Multiple through holes are provided on the fixture table, and suction nozzles are connected to the bottom of each suction cup pad through one of these through holes. Multiple suction nozzles are connected via an air extraction pipe. The automatic air path connector is located at the center of the bottom at both ends of the fixture table, and the air extraction pipe is connected to the automatic air path connector.

[0005] Furthermore, it also includes a support plate, support columns, and an automatic air circuit connector, all of which are mounted on the support plate.

[0006] Furthermore, the zero-point positioner includes a detachably connected rivet and a positioner body. The rivet is fixed to the bottom of the tooling table by fastening bolts, and the positioner body is located on the top of the positioning column.

[0007] Furthermore, an installation groove is provided in the middle of the bottom surface of the tooling table along the length of the tooling table. The automatic air circuit connector is located at both ends of the installation groove. Multiple strip grooves are provided on the bottom surface of the tooling table on both sides of the installation groove along the width of the tooling table. The multiple strip grooves are evenly distributed along the length of the tooling table. The strip grooves are connected to the installation groove. Multiple through holes are evenly distributed at the bottom of the strip groove along the length of the strip groove. The air extraction pipe is laid in the strip groove and connected to the automatic air circuit connector through the installation groove.

[0008] Furthermore, the automatic gas connection device includes a pressure block, a base, a mounting seat, a vent pipe, a sliding sleeve, and a spring. The pressure block is located at the end of the mounting groove, and its bottom surface has a slot. One end of the pressure block has a suction hole communicating with the slot, and the suction pipe is connected to the suction hole. The base is located on a support plate, and the mounting seat is fixedly mounted on top of the base. The base has a cavity inside, and its top surface has a mounting hole communicating with the cavity. The side wall of the base has an exhaust pipe communicating with the cavity. The top surface of the mounting seat has a groove, and the vent pipe is fixed to the mounting seat. One end of the air tube passes through the groove and is inserted into the slot. The other end of the air tube passes through the mounting base and is connected to the mounting hole through the connecting pipe. The sliding sleeve is slidably fitted on the air tube between the pressure block and the mounting base. The spring is fitted on the air tube between the sliding sleeve and the mounting base. The two ends of the spring are fixedly connected to the bottom of the groove and the bottom of the sliding sleeve, respectively. The top surface of the sliding sleeve is in contact with the bottom surface of the pressure block. The end of the air tube inserted into the cavity is provided with a limiting block to limit the sliding sleeve. The side wall of the end of the air tube inserted into the slot is provided with a vent hole that communicates with the air tube hole.

[0009] 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.

[0010] 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.

[0011] Furthermore, the tooling table has guide holes at both ends of its bottom surface, and the support plate has guide posts that slide into the guide holes.

[0012] Furthermore, multiple positioning blocks are sequentially arranged on the top surface of the tooling table along the two adjacent sides, and the part abuts against the multiple positioning blocks simultaneously when the part is inserted into the suction cup pad.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model, through the setup of a tooling table, support column, suction cup pad, automatic air circuit connector, zero-point positioner, suction nozzle, and extraction pipe, places the part on the tooling table and inserts the suction cup pad into the web cavity at the bottom of the part. Then, the tooling table is placed on the support column and fixed by the zero-point positioner. After the tooling table is fixed, the automatic air circuit connector automatically connects the extraction pipe to an external air extraction device, which can then extract air to create a vacuum in the web cavity at the bottom of the part, thereby adsorbing and fixing the part. No additional clamping tools are needed to clamp and fix the part, making the clamping operation more convenient and faster, and improving work efficiency.

[0014] 2. The suction cup pad in this utility model is designed universally according to the bottom web cavity of the part, so that the height of the suction cup pad is consistent with the depth of the web cavity. This allows the suction cup pad to be adapted to different types of aviation aluminum parts, avoiding the need to change different suction cup pads when clamping different parts. This reduces the tooling cost investment due to small batches and multiple styles of parts, and improves the versatility of vacuum milling clamping tooling. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the clamping of the parts in this utility model; Figure 2 This is a schematic diagram of the overall structure of the vacuum milling clamping fixture in this utility model; Figure 3 This is a schematic diagram of the bottom structure of the vacuum milling clamping fixture in this utility model; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the diagram; Figure 5 This is a schematic diagram of the zero-point positioner in this utility model; Figure 6 This is a three-dimensional schematic diagram of the overall structure of the automatic gas circuit docking device of this utility model; Figure 7 This is a cross-sectional view of the overall structure of the automatic gas circuit docking device of this utility model; Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B in the diagram.

[0016] In the diagram: 1. Tooling table; 2. Support column; 3. Suction cup pad; 4. Automatic air circuit connector; 41. Pressure block; 42. Base; 43. Mounting seat; 44. Vent pipe; 45. Sliding sleeve; 46. Spring; 5. Zero point positioner; 51. Pull stud; 52. Positioner body; 6. Positioning block; 7. Through hole; 8. Suction nozzle; 9. Extraction pipe; 10. Support plate; 11. Mounting groove; 12. Strip groove; 13. Slot; 14. Extraction hole; 15. Cavity; 16. Mounting hole; 17. Exhaust pipe; 18. Groove; 19. Connecting pipe; 20. Limiting block; 21. Vent hole; 22. First sealing ring; 23. Second sealing ring; 24. Guide column; 25. Fastening bolt. Detailed Implementation

[0017] 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.

[0018] like Figures 1-5 As shown, a vacuum milling clamping fixture with an air path switching device includes a fixture table 1, support columns 2, suction cup pads 3, an automatic air path connector 4, and a zero-point positioner 5. The bottom of the fixture table 1 is provided with multiple support columns 2, and the bottom of the fixture table 1 is detachably connected to the top of the support columns 2 via the zero-point positioner 5. The top of the fixture table 1 is fixed with multiple suction cup pads 3 that interlock with the web cavity at the bottom of the part. The multiple suction cup pads 3 are arranged in a rectangular array on the fixture table 1. The fixture table 1 has multiple through holes 7, and the bottom of each suction cup pad 3 passes through the through holes 7 and is connected to a suction nozzle 8. The multiple suction nozzles 8 are connected via an air extraction pipe 9. The automatic air path connector 4 is located at the bottom center at both ends of the fixture table 1, and the air extraction pipe 9 is connected to the automatic air path connector 4.

[0019] The vacuum milling clamp also includes a support plate 10, which is fixed to the machine tool's worktable. The support column 2 and the automatic air connection device 4 are both fixed on the support plate 10. The automatic connection device is externally connected to an air extraction device such as a vacuum pump. When clamping a part, the part is first placed on the fixture table 1, and the suction cup pad 3 is inserted into the web cavity at the bottom of the part. Then, the fixture table 1 is placed on the support column 2, and the fixture table 1 is fixed by the zero-point locator 5. When the fixture table 1 is fixed on the support column 2, the automatic air connection device 4 will automatically connect the air extraction pipe 9 to the external air extraction device, and then the external air extraction device can be used to extract air, creating a vacuum in the web cavity at the bottom of the part, thereby adsorbing and fixing the part, so as to achieve rapid fixation of the part.

[0020] To improve the versatility of the vacuum milling clamping fixture, the suction cup pad 3 is designed universally according to the bottom web cavity of the part, so that the height of the suction cup pad 3 is consistent with the depth of the web cavity. This allows the suction cup pad 3 to be compatible with different types of aerospace aluminum parts, avoiding the need to change different suction cup pads 3 when clamping different parts. This can reduce the tooling cost investment due to the small batch and variety of parts.

[0021] like Figure 5 As shown, the zero-point positioner 5 includes a detachably connected rivet 51 and a positioner body 52. ​​The rivet 51 is fixed to the bottom of the tooling table 1 by fastening bolts 25, and the positioner body 52 is fixed to the top of the positioning column. The detachable connection between the rivet 51 and the positioner body 52 allows for quick assembly and disassembly of the tooling table 1. The overall structure and working principle of the zero-point positioner 5 are existing technologies and will not be repeated here.

[0022] like Figure 3 , Figure 4 As shown, in order to facilitate the installation of the extraction pipe 9, an installation groove 11 is provided in the middle of the bottom surface of the tooling table 1 along the length direction of the tooling table 1. The automatic air circuit connector 4 is provided at both ends of the installation groove 11. Multiple strip grooves 12 are provided on the bottom surface of the tooling table 1 on both sides of the installation groove 11 along the width direction of the tooling table 1. The multiple strip grooves 12 are distributed at equal intervals along the length direction of the tooling table 1. The strip grooves 12 are connected to the installation groove 11. Multiple through holes 7 are provided at equal intervals along the length direction of the strip groove 12 at the bottom. The extraction pipe 9 is installed in the strip groove 12 and connected to the automatic air circuit connector 4 through the installation groove 11.

[0023] like Figures 6-8As shown, the automatic air circuit connector 4 includes a pressure block 41, a base 42, a mounting base 43, a vent pipe 44, a sliding sleeve 45, and a spring 46. The pressure block 41 is fixed to the end of the mounting groove 11. The bottom surface of the pressure block 41 has a slot 13, and one end of the pressure block 41 has a suction hole 14 communicating with the slot 13. The suction pipe 9 is connected to the suction hole 14. The base 42 is fixed on the support plate 10, and the mounting base 43 is fixedly mounted on the top of the base 42. The base 42 has a cavity 15 inside, and the top surface of the base 42 has a mounting hole 16 communicating with the cavity 15. An exhaust pipe 17 communicating with the cavity 15 is fixed to the side wall of the base 42. The top surface of the mounting base 43 has a groove 18. The vent pipe 44 is fixed on the mounting base 43. One end of the vent pipe 44 passes through the groove 18 and is inserted into the slot 13. The other end of the vent pipe 44... The air tube passes through the mounting base 43 and is connected to the mounting hole 16 via the connecting pipe 19; the sliding sleeve 45 is slidably sleeved on the vent pipe 44 between the pressure block 41 and the mounting base 43; the spring 46 is sleeved on the vent pipe 44 between the sliding sleeve 45 and the mounting base 43; the two ends of the spring 46 are fixedly connected to the bottom of the groove 18 and the bottom of the sliding sleeve 45, respectively; the top surface of the sliding sleeve 45 is in contact with the bottom surface of the pressure block 41; a limiting block 20 is fixed at one end of the vent pipe 44 inserted into the cavity 15 to limit the sliding sleeve 45; the limiting block 20 is integrally formed with the vent pipe 44; the side wall of one end of the vent pipe 44 inserted into the slot 13 is provided with a vent hole 21 that communicates with the pipe hole of the vent pipe 44.

[0024] When the tooling table 1 is not placed on the support column 2, the sliding sleeve 45 abuts against the limiting block 20 under the support of the spring 46. At this time, the vent hole 21 is blocked by the inner wall of the sliding sleeve 45, thus disconnecting the air extraction pipe 9 from the external air extraction equipment. When the tooling table 1 is fixed on the support column 2, the tooling table 1 presses down on the sliding sleeve 45 through the pressure block 41, exposing the vent hole 21. The spring 46 is compressed, and at the same time, the air extraction pipe 44 is inserted into the slot 13, making the vent hole 21 connected to the slot 13, thus connecting the air extraction pipe 9 to the external air extraction equipment. Then, air can be extracted through the external air extraction equipment. When the tooling table 1 is removed, under the restoring force of the spring 46, the spring 46 pushes the sliding sleeve 45 to slide up along the air extraction pipe 44, so that the sliding sleeve 45 abuts against the limiting block 20 while blocking the vent hole 21, thus disconnecting the air extraction pipe 9 from the external air extraction equipment.

[0025] like Figure 8As shown, to ensure the airtightness of the automatic air connector 4, a first sealing ring 22 is fitted on the air pipe 44 above and below the air hole 21, abutting against the inner wall of the sliding sleeve 45. Simultaneously, a second sealing ring 23 is embedded around the air pipe 44 on the top surface of the sliding sleeve 45, abutting against the bottom surface of the pressure block 41. When the tooling table 1 is not placed on the support column 2, the sliding sleeve 45 covers the air hole 21, and the first and second sealing rings 22 and 23 abut against the inner wall of the sliding sleeve 45, thus sealing the air hole 21. After the pressure block 41 presses down on the sliding sleeve 45 to connect the suction pipe 9 to the external suction equipment, the second sealing ring 23 ensures the airtightness between the pressure block 41 and the sliding sleeve 45, thus preventing air leakage during suction.

[0026] like Figure 2 As shown, guide holes are provided at both ends of the bottom surface of the tooling table 1. A guide post 24 that is slidably inserted into the guide hole is fixed on the support plate 10. When the tooling table 1 is placed on the support post 2, the tooling table 1 is positioned by the sliding cooperation between the guide post 24 and the guide hole.

[0027] like Figure 1 , Figure 2 As shown, multiple positioning blocks 6 are fixed sequentially on the top surface of the tooling table 1 along two adjacent sides. When the part is placed on the tooling table 1 and the part is inserted into the suction cup pad 3, the part abuts against the multiple positioning blocks 6 at the same time, thereby realizing the processing positioning of the part through the positioning blocks 6.

[0028] This utility model enables the rapid assembly and disassembly of the vacuum milling clamp on the machine tool worktable through the zero-point positioner 5. At the same time, combined with the use of the automatic air circuit connector 4, the vacuum milling clamp eliminates the need for additional clamping tools to hold and fix parts when clamping them. The parts can be quickly fixed by vacuum adsorption, making the clamping operation more convenient and faster, and improving work efficiency.

[0029] 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 vacuum milling jig with gas path switching device, characterized by: Includes a tooling table (1), support columns (2), suction cup pads (3), an automatic air path connector (4), and a zero-point locator (5). The tooling table (1) has multiple support columns (2) at its bottom. The bottom of the tooling table (1) is detachably connected to the top of the support columns (2) through the zero-point locator (5). The top of the tooling table (1) has a rectangular array of multiple suction cup pads (3) that are inserted into the web cavity at the bottom of the part. The tooling table (1) has multiple through holes (7). The bottom of the suction cup pads (3) passes through the through holes (7) and is connected to a suction nozzle (8). The multiple suction nozzles (8) are connected through an air extraction pipe (9). The automatic air path connector (4) is located at the bottom center of both ends of the tooling table (1). The air extraction pipe (9) is connected to the automatic air path connector (4).

2. The vacuum milling jig according to claim 1, wherein: It also includes a support plate (10), a support column (2), and an automatic gas line connector (4), all of which are located on the support plate (10).

3. The vacuum milling jig according to claim 1, wherein: The zero-point positioner (5) includes a detachably connected rivet (51) and a positioner body (52). The rivet (51) is fixed to the bottom of the tooling table (1) by a fastening bolt (25), and the positioner body (52) is located on the top of the positioning column.

4. The vacuum milling jig according to claim 2, wherein: The bottom surface of the tooling table (1) is provided with an installation groove (11) along the length direction of the tooling table (1). The automatic air circuit connector (4) is located at both ends of the installation groove (11). The bottom surface of the tooling table (1) on both sides of the installation groove (11) is provided with multiple strip grooves (12) along the width direction of the tooling table (1). The multiple strip grooves (12) are distributed at equal intervals along the length direction of the tooling table (1). The strip grooves (12) are connected to the installation groove (11). The bottom of the strip grooves (12) is provided with multiple through holes (7) at equal intervals along the length direction of the strip grooves (12). The air extraction pipe (9) is arranged in the strip grooves (12) and connected to the automatic air circuit connector (4) through the installation groove (11).

5. The vacuum milling jig according to claim 4, wherein: The automatic air circuit connector (4) includes a pressure block (41), a base (42), a mounting seat (43), a vent pipe (44), a sliding sleeve (45), and a spring (46). The pressure block (41) is located at the end of the mounting groove (11). The bottom surface of the pressure block (41) is provided with a slot (13). One end of the pressure block (41) is provided with a suction hole (14) communicating with the slot (13). The suction pipe (9) is connected to the suction hole (14). The base (42) is located on the support plate (10). The mounting seat (43) is fixedly mounted on the top of the base (42). The base (42) has a cavity (15). The top surface of the base (42) is provided with a mounting hole (16) communicating with the cavity (15). The side wall of the base (42) is provided with an exhaust pipe (17) communicating with the cavity (15). The top surface of the mounting seat (43) is provided with a groove (18). The vent pipe (44) is fixed to the mounting seat (43). On the ), one end of the vent pipe (44) passes through the groove (18) and is inserted into the slot (13), and the other end of the vent pipe (44) passes through the mounting base (43) and is connected to the mounting hole (16) through the connecting pipe (19). The sliding sleeve (45) is slidably sleeved on the vent pipe (44) between the pressure block (41) and the mounting base (43). The spring (46) is sleeved on the vent pipe (44) between the sliding sleeve (45) and the mounting base (43). The two ends of the spring (46) are fixedly connected to the bottom of the groove (18) and the bottom of the sliding sleeve (45) respectively. The top surface of the sliding sleeve (45) is in contact with the bottom surface of the pressure block (41). The end of the vent pipe (44) inserted into the cavity (15) is provided with a limiting block (20) to limit the sliding sleeve (45). The side wall of the end of the vent pipe (44) inserted into the slot (13) is provided with a vent hole (21) that communicates with the pipe hole of the vent pipe (44).

6. The vacuum milling jig according to claim 5, wherein: The ventilation pipe is fitted with a first sealing ring (22) that abuts against the inner wall of the sliding sleeve, both above and below the ventilation hole (21).

7. The vacuum milling tool holder with gas path switching device according to claim 5, characterized in that: The top surface of the sliding sleeve is fitted with a second sealing ring (23) that abuts against the bottom surface of the pressure block.

8. The vacuum milling jig according to claim 2, wherein: The tooling table (1) has guide holes at both ends of its bottom surface, and the support plate (10) has guide posts (24) that are slidably inserted into the guide holes.

9. The vacuum milling tool holder with gas path switching device of claim 1, wherein: The tooling table (1) has multiple positioning blocks (6) arranged sequentially on the two adjacent sides of the top surface. When the part is inserted into the suction cup pad (3), the part and the multiple positioning blocks (6) abut at the same time.

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