Double-station exchange workbench of milling machine

Abstract

The invention belongs to the technical field of workbenches, and particularly relates to a milling machine double-station exchange workbench which comprises a lathe bed, a numerical control milling tool is fixedly installed on the outer wall of one end of the lathe bed, a fence is fixedly installed on the periphery of the outer wall of the top of the lathe bed, and a center control center is fixedly installed on the outer wall of one side of the fence. Two lifting frames are fixedly installed on the outer wall of the top of the lathe bed, electric control guide rails are fixedly installed on the outer walls of the tops of the lifting frames and the outer walls of the two sides of the top of the fence, and bases are arranged on the outer walls of the tops of the lifting frames; the roller fixedly connected with the first machining table can synchronously slide on the inner wall of the positioning sliding rail, air pressure is transmitted into an air pipe through a connecting hose and finally discharged from an air injection valve head, airtight impact is formed to blow metal chippings on the inner wall of the positioning sliding rail, and then roller abrasion and driving jamming are reduced; the moving precision of the first machining table and the drilling and milling precision of the machined part are guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of worktable technology, specifically relating to a dual-station exchange worktable for a milling machine. Background Technology

[0002] A dual-station exchange table for milling machines is a machining device equipped with two stations. It achieves automatic station switching through a servo drive system, aiming to reduce machine tool downtime and improve machining efficiency.

[0003] For example, the dual-station exchangeable welding workbench described in National Patent Publication No. CN216421443U includes a base frame. The base frame adopts a stepped mechanism. The inner side of the base frame is correspondingly provided with a first slide rail and a second slide rail. The first slide rail and the second slide rail are slidably arranged with a first worktable and a second worktable. An exchange motor is provided on one side of the base frame. The output wheel of the exchange motor is connected to a transmission wheel through a first synchronous belt. This dual-station exchangeable welding workbench simplifies the operation process and has high production efficiency. Under the action of the first worktable, the second worktable, and the exchange motor, the upper and lower cycles alternate, and the feeding and welding operations are performed simultaneously, effectively improving work efficiency. The synchronous belt double-sided drive mode is used to achieve smooth exchange and precise positioning of the two workstations, effectively improving welding quality.

[0004] However, traditional devices still have the following problems when in use: In traditional milling and drilling operations, metal chips often fall onto the slide rail where the drive wheel is located. The chips are easily crushed by the drive wheel, which can cause drive jamming and wear, thus affecting the movement accuracy of the worktable and reducing the milling and drilling accuracy of the workpiece. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a dual-station exchange table for milling machines, which has the advantages of reducing wear of transmission wheels and drive jamming, thereby ensuring the movement accuracy of the table and the drilling and milling accuracy of the workpiece.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dual-station exchange worktable for a milling machine, comprising a bed, a CNC milling tool fixedly mounted on the outer wall of one end of the bed, a guardrail fixedly mounted around the top outer wall of the bed, a central control center fixedly mounted on one side of the guardrail, two lifting frames fixedly mounted on the top outer wall of the bed, electrically controlled guide rails fixedly mounted on the top outer walls of the lifting frames and the top two side outer walls of the guardrail, a base provided on the top outer wall of the lifting frames, and the top outer walls of the guardrail... A second processing table is provided. Slider blocks are fixedly installed on the bottom outer walls of both the base and the second processing table. The inner wall of the slider is electrically slidably connected to the outer wall of the electrically controlled guide rail. A positioning frame is fixedly installed on the top outer wall of the bed. The positioning frame has a positioning slide rail that connects the outer walls of both sides. An extension frame is fixedly installed on the bottom outer wall of the first processing table. A shaft is fixedly installed on the outer wall of the extension frame away from the first processing table. A roller is rotatably connected to the outer wall of the shaft. The outer wall of the roller rotates and fits against the inner wall of the positioning slide rail.

[0007] Preferably, pressure boxes are fixedly installed on both sides of the bottom outer wall of the base located on the positioning frame. Air pipes are provided on the inner wall of the positioning slide rail at the front and rear sides of the rollers. Bearing rollers are fixedly connected to the outer walls of both ends of the air pipes. The inner bushings of the bearing rollers are fixedly connected to the outer walls of the air pipes. The outer bushings of the bearing rollers are movably fitted with the inner walls of the positioning slide rails. A row of air jet valve heads is fixedly connected to one side of the outer wall of the air pipe. A load-bearing block is fixedly connected to the bottom outer wall of the air pipe. Connecting hoses are fixedly connected to the inner bushings of the two bearing rollers. The outer walls of the two connecting hoses on the side away from the bearing rollers are respectively connected to the inner walls of the two pressure boxes.

[0008] Preferably, the base has four limiting holes that are connected to the interior of the two sets of pressure boxes respectively. Four limiting rods are fixedly connected to the bottom outer wall of the processing table. The outer wall of the limiting rod is movably fitted with the inner wall of the limiting hole. A pressure plate is movably fitted to the inner wall of the pressure box. The top outer wall of the pressure plate is fixedly connected to the outer wall of the end of the limiting rod away from the processing table.

[0009] Preferably, the pressure plate has a slot that connects the outer walls on both sides, and a rubber membrane is fixedly connected to the inner wall of the slot.

[0010] Preferably, one side of the pressure box has a connecting hole that communicates with the inner wall, and the two pressure boxes are fixedly connected to the same connecting pipe through the connecting holes. One side of the connecting pipe is fixedly connected to one side of the pressure box, and the top outer wall of the connecting pipe is fixedly connected to the bottom outer wall of the base.

[0011] Preferably, an air inlet valve is provided on the inner wall of the pressure box at the location of the connecting hose, a retaining seat is fixedly installed on the bottom inner wall of the pressure box, an adjusting rod is slidably connected to the inner wall of the retaining seat, two positioning blocks are fixedly installed on the outer wall of the adjusting rod, and a rubber sealing block is fixedly installed on one side of the outer wall of the positioning block, and the two rubber sealing blocks are respectively in contact with the two air inlet valves.

[0012] Preferably, the outer walls on both sides of the pressure box have through openings, the inner walls of the through openings are movably connected to the outer walls of the adjusting rod, and both ends of the adjusting rod are fixedly connected to pressure plates through the through openings.

[0013] Preferably, a folding telescopic tube is fixedly connected to one side of the outer wall of the pressure plate, and the outer wall of the end of the folding telescopic tube away from the pressure plate is fixedly connected to the outer wall of the pressure box. The folding telescopic tube is sleeved on the outer wall of the adjusting rod.

[0014] Preferably, a one-way valve 1 connected to the upper space of the pressure plate is installed at the top of the pressure box, and a one-way valve 2 connected to the lower space of the pressure plate is installed on one side of the outer wall of the pressure box.

[0015] Preferably, an electromagnetic plate is fixedly installed on the bottom outer wall of the pressure box, and a collection groove is provided at one end of the top outer wall of the bed.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the reciprocating movement of machining table one and machining table two via electrically controlled guide rails and sliders enables automatic switching of workstations, reducing milling machine downtime and improving processing efficiency. During the reciprocating movement of machining table one, the rollers fixedly connected to it also slide synchronously on the inner wall of the positioning slide rail. When passing the arc slope of the positioning slide rail, the rollers pull the machining table down via the extension frame. At this time, machining table one simultaneously presses the limit rod, causing the pressure plate to move downwards on the inner wall of the pressure box, thereby compressing the air pressure in the lower space of the pressure box. The air pressure is transmitted through the connecting hose to the air pipe and finally discharged from the jet valve head, forming an airtight impact that blows away metal debris from the inner wall of the positioning slide rail, thereby reducing roller wear and drive jamming, and ensuring the movement accuracy of machining table one and the drilling and milling accuracy of the workpiece. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention in the upper left direction.

[0018] Figure 2 This is a schematic diagram of the overall structure of the present invention in the upper right direction.

[0019] Figure 3 This is a top view of the structure of the present invention.

[0020] Figure 4This is a side view of the structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the front view of the present invention after the front side enclosure has been removed.

[0022] Figure 6 This is a schematic diagram of the upper right structure after the enclosure has been removed according to the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of the present invention after removing the lifting frame on one side.

[0024] Figure 8 This is a schematic diagram of the internal structure of the pressure box of the present invention.

[0025] Figure 9 for Figure 8 An enlarged structural diagram.

[0026] Figure 10 This is a schematic diagram of the positioning slide rail structure of the present invention.

[0027] Figure 11 for Figure 10 An enlarged structural diagram.

[0028] Figure 12 This is a schematic diagram of the roller structure of the present invention.

[0029] In the diagram: 1. Machine bed; 2. CNC milling machine; 3. Enclosure; 4. Central control center; 5. Elevating frame; 6. Electrically controlled guide rail; 7. Slider; 8. Base; 9. Limiting hole; 10. Limiting rod; 11. Machining table one; 12. Machining table two; 13. Positioning frame; 14. Positioning slide rail; 15. Extension frame; 16. Shaft; 17. Roller; 18. Pressure box; 19. Pressure plate; 20. Air inlet valve; 21. Connecting hose; 22. Air pipe; 23. Bearing roller; 24. Air jet valve head; 25. Rubber diaphragm; 26. Connecting hole; 27. Connecting pipe; 28. Holding seat; 29. ​​Adjusting rod; 30. Pressure plate; 31. Folding telescopic tube; 32. Positioning block; 33. One-way valve one; 34. One-way valve two; 35. Electromagnetic plate; 36. Collection tank; 37. Load-bearing block. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1, please refer to Figures 1 to 12 This invention provides a technical solution: a dual-station exchange worktable for a milling machine, comprising a bed 1, a CNC milling tool 2 fixedly mounted on the outer wall of one end of the bed 1, a surrounding barrier 3 fixedly mounted around the top outer wall of the bed 1, a central control center 4 fixedly mounted on one side of the surrounding barrier 3, two lifting frames 5 fixedly mounted on the top outer wall of the bed 1, electrically controlled guide rails 6 fixedly mounted on the top outer wall of the lifting frames 5 and the top two sides of the surrounding barrier 3, a base 8 provided on the top outer wall of the lifting frames 5, and a machining table 12 provided on the top outer wall of the surrounding barrier 3. Both the bottom outer wall of the machining table 11 and the machining table 2 are fixedly equipped with sliders 7. The inner wall of the sliders 7 is electrically slidably connected to the outer wall of the electrically controlled guide rail 6. The top outer wall of the bed 1 is fixedly equipped with a positioning frame 13. The positioning frame 13 has positioning slide rails 14 that connect the outer walls of both sides. The bottom outer wall of the machining table 11 is fixedly equipped with an extension frame 15. The outer wall of the extension frame 15 away from the machining table 11 is fixedly equipped with a shaft 16. The outer wall of the shaft 16 is rotatably connected to a roller 17. The outer wall of the roller 17 rotates and fits against the inner wall of the positioning slide rail 14. The base 8 Air pressure boxes 18 are fixedly installed on both sides of the bottom outer wall of the positioning frame 13. Air pipes 22 are provided on the inner wall of the positioning slide rail 14 at the front and rear sides of the rollers 17. Bearing rollers 23 are fixedly connected to the outer walls of both ends of the air pipes 22. The inner bushings of the bearing rollers 23 are fixedly connected to the outer walls of the air pipes 22, and the outer bushings of the bearing rollers 23 are movably fitted to the inner walls of the positioning slide rail 14. A row of air jet valve heads 24 is fixedly connected to one side of the outer wall of the air pipes 22. A load-bearing block 37 is fixedly connected to the bottom outer wall of the air pipes 22. Two bearing rollers 23 The inner bushing is fixedly connected to a connecting hose 21. The outer wall of the two connecting hoses 21 away from the bearing roller 23 is connected to the inner wall of the two pressure boxes 18 respectively. The base 8 has four limiting holes 9 that are connected to the inside of the two pressure boxes 18 respectively. The bottom outer wall of the processing table 11 is fixedly connected to four limiting rods 10. The outer wall of the limiting rod 10 is movably fitted with the inner wall of the limiting hole 9. The inner wall of the pressure box 18 is movably fitted with a pressure plate 19. The top outer wall of the pressure plate 19 is fixedly connected to the outer wall of the end of the limiting rod 10 away from the processing table 11.

[0032] In this invention, the reciprocating movement of machining table 11 and machining table 212 is driven by the electrically controlled guide rail 6 and slider 7 to achieve automatic switching of workstations, reducing milling machine downtime and improving processing efficiency. When machining table 11 reciprocates, the roller 17 fixedly connected to machining table 11 also slides synchronously on the inner wall of the positioning slide rail 14. When passing through the arc slope of the positioning slide rail 14, the roller 17 will drive machining table 11 to pull down through the extension frame 15. At this time, machining table 11 will simultaneously press the limit rod 10 to drive the pressure plate 19 to move down on the inner wall of the pressure box 18, thereby pressing the pressure box. The air pressure in the lower space 18 is transmitted to the air pipe 22 through the connecting hose 21 and finally discharged from the jet valve head 24, forming an airtight impact to blow away metal debris on the inner wall of the positioning slide rail 14, thereby reducing wear on the roller 17 and drive jamming, ensuring the movement accuracy of the processing table 11 and the drilling and milling accuracy of the workpiece. In this invention, the connecting hose 21 has bending elasticity. By installing the connecting hose 21, the angle of the positioning slide rail 14 can be adapted to change. At the same time, the load-bearing balance of the installed load-bearing block 37 can ensure that the jet valve head 24 always maintains a stable blowing angle.

[0033] In Embodiment 2, based on Embodiment 1, the pressure plate 19 has a slot that connects the outer walls on both sides. A rubber membrane 25 is fixedly connected to the inner wall of the slot. A connecting hole 26 that connects to the inner wall is opened on one side of the outer wall of the pressure box 18. The connecting holes 26 of the two pressure boxes 18 are fixedly connected to the same connecting pipe 27. One side of the outer wall of the connecting pipe 27 is fixedly connected to one side of the outer wall of the pressure box 18. The top outer wall of the connecting pipe 27 is fixedly connected to the bottom outer wall of the base 8.

[0034] In this invention, the rubber diaphragm 25 has sufficient rubber elasticity and airtightness. When the pressure plate 19 is pressed down quickly, the release speed of the lower air pressure of the pressure plate 19 is higher than the intake speed of the lower air pressure. At this time, the rubber diaphragm 25 will be blown and deformed by the pressure, adjusting the pressure on both sides. At the same time, when it enters the horizontal axis through the arc slope of the positioning slide rail 14, the release pressure of the lower air pressure of the pressure plate 19 becomes lower. At this time, the deformation of the rubber diaphragm 25 will gradually rebound into a flat membrane. The air pressure retained by the blowing deformation will assist in blowing to the horizontal axis section, so that this invention has adaptive adjustment. At the same time, the air in the two pressure boxes 18 can be connected through the connecting pipe 27, ensuring the weight balance of the base 8 while realizing double pressure supply to the jet valve head 24.

[0035] In Example 3, based on Example 2, an air inlet valve 20 is provided on the inner wall of the pressure box 18 at the location of the connecting hose 21. A retaining seat 28 is fixedly installed on the bottom inner wall of the pressure box 18. An adjusting rod 29 is slidably connected to the inner wall of the retaining seat 28. Two positioning blocks 32 are fixedly installed on the outer wall of the adjusting rod 29. A rubber sealing block is fixedly installed on one side of the outer wall of the positioning block 32. The two rubber sealing blocks are respectively in contact with the two air inlet valves 20. Through openings are provided on both sides of the outer wall of the pressure box 18. The inner wall of the through opening is movably connected to the outer wall of the adjusting rod 29. The two ends of the adjusting rod 29 pass through... A pressure plate 30 is fixedly connected to each through opening. A folding telescopic tube 31 is fixedly connected to one side of the outer wall of the pressure plate 30. The outer wall of the folding telescopic tube 31 away from the pressure plate 30 is fixedly connected to the outer wall of the pressure box 18. The folding telescopic tube 31 is sleeved on the outer wall of the adjusting rod 29. A one-way valve 33 connected to the upper space of the pressure plate 19 is installed at the top of the pressure box 18. A one-way valve 34 connected to the lower space of the pressure plate 19 is installed on one side of the outer wall of the pressure box 18. An electromagnetic plate 35 is fixedly installed on the bottom outer wall of the pressure box 18. A collection groove 36 is opened at one end of the top outer wall of the bed 1.

[0036] In this invention, when the processing table 11 is moved to either end, the pressure plate 30 near the end will press against the inner wall of the enclosure 3, causing the adjusting rod 29 inside the pressure box 18 to move. At this time, the positioning block 32 near the end will move synchronously with the adjusting rod 29 to the position of the air inlet valve 20 on one side. The rubber sealing block will block the port to prevent air flow. Meanwhile, the positioning block 32 in the return direction will move synchronously with the adjusting rod 29 to disengage from the position of the air inlet valve 20 in the return direction, opening the air flow. Through this device, the processing table 11 will only allow the jet valve head 24 in the return direction to exhaust, avoiding the discharge of excess air pressure. This allows the two sets of air pipes 22 to achieve adaptive adjustment of direction. The airtightness of the pressure box 18 is ensured by setting a compressible and retractable foldable telescopic tube 31 to prevent air from leaking out from the through-hole. The central control center 4 is electrically connected to all electrical components in this invention.

[0037] Working principle and usage of the invention: In this invention, the reciprocating movement of machining table 11 and machining table 212 is driven by the electrically controlled guide rail 6 and slider 7 to achieve automatic switching of workstations, reduce milling machine downtime, and improve processing efficiency. When machining table 11 reciprocates, the roller 17 fixedly connected to machining table 11 also slides synchronously on the inner wall of the positioning slide rail 14. When passing through the arc slope of the positioning slide rail 14, the roller 17 will drive machining table 11 to pull down through the extension frame 15. At this time, machining table 11 will simultaneously press the limit rod 10 to drive the pressure plate 19 to move down on the inner wall of the pressure box 18, thereby compressing the air pressure in the lower space of the pressure box 18. The air pressure is transmitted through the connecting hose 21. The air intake pipe 22 finally exits from the jet valve head 24, forming an airtight impact to blow away metal debris from the inner wall of the positioning slide rail 14, thereby reducing wear on the roller 17 and drive jamming, ensuring the movement accuracy of the machining table 11 and the drilling and milling accuracy of the workpiece. In this invention, the connecting hose 21 has bending elasticity. By installing the connecting hose 21, it can adapt to the angle changes of the positioning slide rail 14. At the same time, the load-bearing balance of the load-bearing block 37 can ensure that the jet valve head 24 always maintains a stable blowing angle. In this invention, the rubber diaphragm 25 has sufficient rubber elasticity and airtightness. When the pressure plate 19 is pressed down quickly, the release speed of the lower air pressure of the pressure plate 19 is higher than the intake speed of the lower air pressure. At this time, the rubber diaphragm 25 will be inflated and deformed under pressure, adjusting the pressure on both sides. At the same time, when it enters the horizontal axis through the arc slope of the positioning slide rail 14, the release pressure of the air pressure under the pressure plate 19 becomes lower. At this time, the deformation of the rubber diaphragm 25 will gradually rebound into a flat membrane. The air pressure retained by the inflated deformation will assist in blowing to the horizontal axis section, giving the invention adaptive adjustment. Meanwhile, the air in the two pressure boxes 18 can be connected through the connecting pipe 27, ensuring the weight balance of the base 8 while achieving double pressure supply to the jet valve head 24. In this invention, when the processing table 11 moves to either end, the pressure plate 30 near the end will press against the inner wall of the enclosure 3, driving the internal adjustment of the pressure box 18. When the lever 29 moves, the positioning block 32 near the end will move synchronously with the adjusting lever 29 to the position of the air inlet valve 20 on one side. The rubber sealing block will block the port to prevent air flow. Meanwhile, the positioning block 32 in the return direction will move synchronously with the adjusting lever 29 to disengage from the position of the air inlet valve 20 in the return direction, opening the air flow. This device ensures that the processing table 11 will only allow the jet valve head 24 in the return direction to exhaust, avoiding the discharge of excess air pressure. This allows the two sets of air pipes 22 to achieve adaptive adjustment of direction. The airtightness of the pressure box 18 is ensured by setting a compressible and retractable foldable telescopic tube 31 to prevent air from leaking out from the through port. The central control center 4 is electrically connected to all electrical components in this invention.

[0038] Although embodiments of the invention have been shown and described, 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-station exchange table for a milling machine, comprising a bed (1), characterized in that: A CNC milling machine (2) is fixedly installed on the outer wall of one end of the bed (1). A guardrail (3) is fixedly installed around the top outer wall of the bed (1). A central control center (4) is fixedly installed on one side of the guardrail (3). Two lifting frames (5) are fixedly installed on the top outer wall of the bed (1). Electrically controlled guide rails (6) are fixedly installed on the top outer wall of the lifting frames (5) and the top two outer walls of the guardrail (3). A base (8) is provided on the top outer wall of the lifting frames (5). A second processing table (12) is provided on the top outer wall of the guardrail (3). The bottom outer walls of the base (8) and the second processing table (12) are... All are fixedly installed with sliders (7), the inner wall of the sliders (7) is electrically slidably connected to the outer wall of the electrically controlled guide rail (6), the top outer wall of the bed (1) is fixedly installed with a positioning frame (13), the positioning frame (13) is provided with a positioning slide rail (14) with the outer walls of both sides connected, the bottom outer wall of the processing table (11) is fixedly installed with an extension frame (15), the outer wall of the extension frame (15) away from the processing table (11) is fixedly installed with a shaft (16), the outer wall of the shaft (16) is rotatably connected with a roller (17), the outer wall of the roller (17) is rotatably fitted with the inner wall of the positioning slide rail (14).

2. The milling machine dual-station exchange worktable according to claim 1, characterized in that: The bottom outer wall of the base (8) is fixedly installed with air pressure boxes (18) on both sides of the positioning frame (13). The inner wall of the positioning slide rail (14) is provided with air pipes (22) on the front and rear sides of the roller (17). The outer walls of both ends of the air pipe (22) are fixedly connected with bearing rollers (23). The inner bushing of the bearing roller (23) is fixedly connected to the outer wall of the air pipe (22). The outer bushing of the bearing roller (23) is movably fitted with the inner wall of the positioning slide rail (14). A row of jet valve heads (24) is fixedly connected to one side of the outer wall of the air pipe (22). A load-bearing block (37) is fixedly connected to the bottom outer wall of the air pipe (22). The inner bushings of the two bearing rollers (23) are fixedly connected with connecting hoses (21). The outer walls of the two connecting hoses (21) away from the bearing rollers (23) are respectively connected to the inner walls of the two air pressure boxes (18).

3. A milling machine dual-station exchange worktable according to claim 1, characterized in that: The base (8) has four limiting holes (9) that are connected to the interior of the two sets of pressure boxes (18). The bottom outer wall of the processing table (11) is fixedly connected with four limiting rods (10). The outer wall of the limiting rod (10) is in contact with the inner wall of the limiting hole (9). The inner wall of the pressure box (18) is in contact with a pressure plate (19). The top outer wall of the pressure plate (19) is fixedly connected with the outer wall of the end of the limiting rod (10) away from the processing table (11).

4. A milling machine dual-station exchange worktable according to claim 3, characterized in that: The pressure plate (19) has a slot that connects the outer walls on both sides, and a rubber membrane (25) is fixedly connected to the inner wall of the slot.

5. A milling machine dual-station exchange worktable according to claim 3, characterized in that: The outer wall of one side of the pressure box (18) is provided with a connecting hole (26) that communicates with the inner wall. The connecting holes (26) of the two pressure boxes (18) are fixedly connected to the same connecting pipe (27). The outer wall of one side of the connecting pipe (27) is fixedly connected to the outer wall of one side of the pressure box (18). The top outer wall of the connecting pipe (27) is fixedly connected to the bottom outer wall of the base (8).

6. A milling machine dual-station exchange worktable according to claim 2, characterized in that: An air inlet valve (20) is provided on the inner wall of the pressure box (18) at the position of the connecting hose (21). A retaining seat (28) is fixedly installed on the bottom inner wall of the pressure box (18). An adjusting rod (29) is slidably connected to the inner wall of the retaining seat (28). Two positioning blocks (32) are fixedly installed on the outer wall of the adjusting rod (29). A rubber sealing block is fixedly installed on one side of the outer wall of the positioning block (32). The two rubber sealing blocks are respectively in contact with the two air inlet valves (20).

7. A milling machine dual-station exchange worktable according to claim 7, characterized in that: The pressure box (18) has through openings on both sides of its outer wall. The inner wall of the through opening is movably connected to the outer wall of the adjusting rod (29). Both ends of the adjusting rod (29) are fixedly connected to the pressure plate (30) through the through opening.

8. A milling machine dual-station exchange worktable according to claim 7, characterized in that: A folding telescopic tube (31) is fixedly connected to one side of the outer wall of the pressure plate (30). The outer wall of the folding telescopic tube (31) away from the pressure plate (30) is fixedly connected to the outer wall of the pressure box (18). The folding telescopic tube (31) is sleeved on the outer wall of the adjusting rod (29).

9. A milling machine dual-station exchange worktable according to claim 2, characterized in that: The top of the pressure box (18) is equipped with a one-way valve (33) that communicates with the upper space of the pressure plate (19), and the outer wall of one side of the pressure box (18) is equipped with a one-way valve (34) that communicates with the lower space of the pressure plate (19).

10. A milling machine dual-station exchange worktable according to claim 2, characterized in that: An electromagnetic plate (35) is fixedly installed on the bottom outer wall of the pressure box (18), and a collection groove (36) is opened at one end of the top outer wall of the bed (1).

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