A double exchange workbench horizontal machining center isolation screen door structure

Abstract

The utility model discloses a double exchange workstation horizontal machining center rotary type isolated screen door structure, including base, screen door body mechanism and rotation drive mechanism. Rotation drive mechanism adopts servo motor cooperation planetary reducer and gear drive, drives screen door body rotation, and compact structure, exchanges fast, and stable operation. The screen door body is equipped with the guide pillar and the guide hole cooperation structure, guarantees the rotation accuracy. Induction switch and induction sheet realize accurate in -place detection. The utility model is suitable for the regional protection of numerical control machining center, has the advantages of reliable structure, strong adaptability, high security.

Description

Technical Field

[0001] This utility model relates to the technical field of protective mechanisms for CNC machine tools, specifically to a screen door structure for a horizontal machining center with a double-exchange worktable. Background Technology

[0002] In the field of CNC machine tools, the double-exchange-table horizontal machining center has two worktables, one for machining and the other for loading, equipped with an automatic exchange mechanism. This allows for simultaneous workpiece clamping and machining, significantly reducing waiting time for workpiece clamping and improving equipment utilization. In the double-exchange-table horizontal machining center, isolation screens are used for area protection, preventing cutting fluid, metal shavings, and other debris from flying out of the machining area, ensuring the cleanliness of the loading area and the safety of operators.

[0003] Currently, the main structures of isolation screen doors are rotating and lifting doors.

[0004] The rotary type mainly uses a dual hydraulic cylinder to drive a rack and pinion mechanism for rotational motion. The disadvantages of this method are: uneven driving pressure from the dual hydraulic cylinders can cause the screen door to jam or even become stuck; the hydraulic drive speed is slow, the exchange mechanism rotates slowly, the exchange time is long, and the efficiency is low.

[0005] The lifting door is driven by a pneumatic or hydraulic cylinder to create space for exchange. Its disadvantages include: occupying too much vertical space, affecting the maximum workpiece height and the overall equipment height, reducing the adaptability of horizontal machining centers; and requiring additional pre-operational actions for lifting the door during worktable exchange compared to rotary systems, increasing exchange time and reducing machine tool efficiency and reliability. Utility Model Content

[0006] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a rotary isolation screen structure for a horizontal machining center with a double exchange worktable. This rotary isolation screen has the characteristics of stable and reliable structure, low cost, short exchange time, and high exchange accuracy. It can also effectively prevent cutting fluid, iron filings, and other debris from flying out of the machining area, ensuring the cleanliness of the loading area and the safety of the operators.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a double-exchange worktable horizontal machining center isolation screen door structure, the innovation of which is that it includes: Base; A rotary drive mechanism is mounted on the base; The screen door mechanism is connected to the output end of the rotary drive mechanism and is driven by it to rotate. The screen door mechanism includes a left screen and a right screen for separating the processing area from the loading area.

[0008] Furthermore, the rotary drive mechanism includes: Drive motor; The speed reducer is connected to the output shaft of the drive motor; Gear transmission pairs include a pinion and a gear that mesh with each other; The rotating shaft is connected to the large gear transmission; The power of the drive motor is transmitted sequentially to the rotary shaft via the reducer and the gear transmission pair, thereby driving the screen door mechanism to rotate.

[0009] Furthermore, the rotary drive mechanism also includes: The bridge plate is fixed to the base; A rotary table is mounted on the bridge plate via the rotary shaft; The screen door mechanism is fixedly installed on the rotating platform.

[0010] Furthermore, the rotating shaft is supported on the bridge plate by at least one thrust roller bearing and at least one tapered roller bearing.

[0011] Furthermore, the screen door mechanism also includes: The lower end of the central column is fixedly connected to the output end of the rotary drive mechanism; The left and right screens are respectively installed on the left and right sides of the central column; The outer frame of the screen door consists of a left frame, a right frame, and a crossbeam frame connecting the two.

[0012] Furthermore, it also includes a screen rotation mechanism, which comprises: The screen hinge is fixed to the crossbeam frame; The screen pivot cover and screen bracket flange are mounted on the screen pivot via tapered roller bearings; The screen pivot cover is provided with guide holes, which cooperate with the guide post set on the flange of the central column to form a connection structure that is fixed in the circumference and movable in the axial direction.

[0013] Furthermore, it also includes an on-site testing organization, which includes: Inductive switch, mounted on a fixed component; The sensing element is mounted on the rotating component; The inductive switch, in conjunction with the inductive plate, is used to detect the rotational position of the screen door mechanism. Furthermore, the fixing component is a base or an inductive switch bracket fixed on the base, and the rotating component is a bridge plate.

[0014] Furthermore, the left and / or right screens are provided with plexiglass windows.

[0015] Furthermore, the plexiglass window is fixed by a glass window clamping plate.

[0016] The beneficial effects of this utility model after adopting the above structure are as follows: This utility model features a stable and reliable structure, low cost, short exchange time, and high exchange accuracy. It can also effectively prevent cutting fluid, iron filings, and other debris from flying out of the processing area, ensuring the cleanliness of the loading area and the safety of operators. Attached Figure Description

[0017] Figure 1 This is an isometric structural diagram of the rotary isolation screen door structure of the double-exchange worktable horizontal machining center disclosed in this utility model. Figure 2 This is an isometric view of the rotary isolation screen structure of the double-exchange worktable horizontal machining center disclosed in this utility model. Figure 3 This is a cross-sectional view of the rotary isolation screen door structure of the double-exchange worktable horizontal machining center disclosed in this utility model. Figure 4 for Figure 1 An enlarged diagram of A in the diagram.

[0018] Explanation of reference numerals in the attached figures: 1. Left frame, 2. Crossbeam frame, 3. Baffle, 4. Left screen, 5. Central column, 6. Right screen, 7. Acrylic glass window, 8. Rotary table, 9. Right frame, 10. Cable tray, 11. Base, 12. Servo motor, 13. Planetary reducer, 14. Glass window pressure plate, 15. Pinion, 16. Screen pivot, 17. Screen bracket flange, 18. Tapered roller bearing, 19. Screen pivot cover, 20. Locking nut, 21. Guide column, 22. Upper flange of central column, 23. Lower flange of central column, 24. Upper cover, 25. Tapered roller bearing, 26. Large gear, 27. Key, 28. Bottom cover, 29. Thrust roller bearing, 30. Rotary shaft, 31. Sensor plate, 32. Sensor switch, 33. Sensor switch bracket. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model.

[0021] See Figure 1-3A rotary isolation screen door structure for a horizontal machining center with a double-exchange worktable includes a base, a screen door body mechanism, an outer frame of the screen door, and a rotary drive mechanism. The rotary drive mechanism is the core component for achieving efficient and stable operation.

[0022] The base 11 is equipped with a screen door mechanism, which includes a left frame 1 and a right frame 9. The left frame 1 and the right frame 9 are connected by a crossbeam frame 2 to form the outer frame of the screen door. The base 11 is equipped with the rotary drive mechanism, which includes a bridge plate 10 mounted on the base 11. The bridge plate 10 also houses a rotary shaft 30, a thrust roller bearing 29, a large gear 26, and a tapered roller bearing 25. The thrust roller bearing 29 is connected to the rotary table 8 via a bottom cover 28 and is specifically designed to withstand the enormous axial pressure generated by the screen door mechanism, ensuring the structural rigidity in the vertical direction. The large gear 26 is circumferentially fixed via a key 27 to transmit rotational torque. The tapered roller bearing 25 is connected to the rotary table 8 via an upper end cover 24 and can simultaneously withstand radial and axial loads, further ensuring the accuracy and stability of the rotary shaft 30 during high-speed rotation. A planetary reducer 13 is mounted on the rotary table 8, and a servo motor 12 is mounted at the tail end of the planetary reducer 13, providing rotational power. The planetary reducer 13 has a pinion 15 mounted on its front axle. The pinion 15 meshes with the large gear 26 to form a first-stage reduction mechanism. The servo motor 12 starts, providing precise rotational power. This power is first transmitted to the planetary reducer 13 for first-stage reduction, thereby achieving a response speed and transmission efficiency far exceeding those of the hydraulic drive method in the prior art, directly solving the problems of slow exchange speed and low efficiency in the existing technology.

[0023] Furthermore, the servo motor 12 drives the rotary shaft 30 to rotate through the planetary reducer 13 and the first-stage reduction mechanism.

[0024] The small gear 15 on the output shaft of the planetary reducer 13 rotates accordingly, driving the large gear 26 that meshes with it. The large gear 26 is circumferentially fixed to the rotating shaft 30 via a key 27, transmitting power and motion to the rotating shaft 30. This two-stage reduction transmission system, consisting of a servo motor 12, a planetary reducer 13, and a small gear 15 / large gear 26, is not only compact in structure but also achieves smooth transmission with high torque and high precision. It fundamentally avoids the problems of uneven pressure, jamming, or even jamming that may occur with dual hydraulic cylinder drives, ensuring the stability and reliability of the screen door's long-term operation.

[0025] The rotating drive mechanism is equipped with a screen door mechanism, which includes a lower central column flange 23, which is connected and fixed to the rotating platform 8. A central column 5 is mounted on the lower central column flange 23, and an upper central column flange 22 is mounted on the upper end of the central column 5. The upper central column flange 22 is equipped with six evenly distributed guide columns 21, which cooperate with guide holes provided on the screen pivot cover 19. This design forms a mechanism that is "circumferentially fixed and axially slightly movable," which provides reliable radial support for the outer frame of the screen door during rotation, ensuring rotational stability. At the same time, it allows for slight axial displacement due to manufacturing and installation errors, avoiding structural interference and further improving operational reliability and accuracy. The screen pivot cover 19, along with the screen support flange 17, tapered roller bearing 18, and locking nut 20, are installed on the screen pivot 16 to form a screen rotation mechanism. The screen pivot 16 is fixed to the crossbeam frame 2. A baffle 3 is connected to the flange 17 of the screen support. This baffle effectively prevents cutting fluid and iron filings from flying into the screen's rotating mechanism, thus preventing contamination or damage to precision bearings and transmission components, and greatly improving the equipment's environmental adaptability and maintenance cycle. A left screen 4 and a right screen 6 are also connected to the central column 5. Each of the left and right screens is equipped with an acrylic window 7, which is fixed by a glass window pressure plate 14. This ensures that operators can clearly observe the internal conditions of the processing area while also providing safety isolation.

[0026] See Figure 4 An inductive switch bracket 33 is mounted on the base 11, and an inductive switch 32 is mounted on the inductive switch bracket 33. One inductive element 31 is mounted on each of the upper and lower edges of the bridge 10. The inductive switch 32 generates a positioning signal through the inductive element 31 to detect the positioning of the screen door mechanism. When the screen door rotates to the predetermined open or closed position, the inductive element 31 enters the detection area of ​​the inductive switch 32, thereby generating a positioning signal and sending it to the machine tool control system. This design automates the entire exchange process, ensuring accurate exchange positions and high repeatability. It not only shortens the exchange time but also eliminates the risk of equipment collisions or downtime caused by inaccurate positioning, significantly improving the machine tool's efficiency and reliability.

[0027] In summary, through the synergistic effect of the above-mentioned components, this utility model specifically realizes a rotating isolation screen door with smooth driving, strong structural rigidity, high rotational accuracy, good protective performance, and precise control, which comprehensively overcomes the defects of the prior art and achieves the expected invention purpose.

[0028] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A partition screen door structure for a horizontal machining center with a double-exchange worktable, characterized in that, include: Base; A rotary drive mechanism is mounted on the base; The screen door mechanism is connected to the output end of the rotary drive mechanism and is driven by it to rotate. The screen door mechanism includes a left screen and a right screen for separating the processing area and the loading area; The rotary drive mechanism includes: Drive motor; The speed reducer is connected to the output shaft of the drive motor; Gear transmission pairs include a pinion and a gear that mesh with each other; The rotating shaft is connected to the large gear transmission; The power of the drive motor is transmitted sequentially to the rotary shaft via the reducer and the gear transmission pair, thereby driving the screen door mechanism to rotate. The rotary drive mechanism further includes: The bridge plate is fixed to the base; A rotary table is mounted on the bridge plate via the rotary shaft; The screen door mechanism is fixedly installed on the rotating platform; The rotating shaft is supported on the bridge plate by at least one thrust roller bearing and at least one tapered roller bearing; The screen door mechanism also includes: The lower end of the central column is fixedly connected to the output end of the rotary drive mechanism; The left and right screens are respectively installed on the left and right sides of the central column; The outer frame of the screen door consists of a left frame, a right frame, and a crossbeam frame connecting the two. It also includes a screen rotation mechanism, which includes: The screen hinge is fixed to the crossbeam frame; The screen pivot cover and screen bracket flange are mounted on the screen pivot via tapered roller bearings; The screen pivot cover is provided with guide holes, which cooperate with the guide post set on the flange of the central column to form a connection structure that is fixed in the circumference and movable in the axial direction.

2. The isolation screen door structure for the double-exchange worktable horizontal machining center according to claim 1, characterized in that, It also includes on-site testing organizations, which include: Inductive switch, mounted on a fixed component; The sensing element is mounted on the rotating component; The inductive switch works in conjunction with the inductive plate to detect the rotational position of the screen door mechanism.

3. The isolation screen door structure for the double-exchange worktable horizontal machining center according to claim 2, characterized in that, The fixed component is a base or an inductive switch bracket fixed on the base, and the rotating component is a bridge plate.

4. The isolation screen door structure for the horizontal machining center with double exchange worktables according to claim 1, characterized in that, The left and / or right screens are provided with plexiglass windows.

5. The isolation screen door structure for the horizontal machining center with double exchange worktables according to claim 4, characterized in that, The acrylic window is fixed by a glass window clamp.

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