Clamping device for machining center

Abstract

The utility model discloses a clamping device for a machining center, which belongs to the technical field of clamping devices and comprises a device base, four supporting columns are fixedly mounted in the middle of the upper surface of the device base, a workbench is fixedly connected to the top ends of the supporting columns, a round hole is formed in the middle of the workbench, and an ejection column is arranged in the round hole in a penetrating manner. Clamping plates are arranged on the left side, the right side and the rear side of the workbench, a pneumatic telescopic machine drives the left clamping plate to form a left-right moving structure, the left clamping plate drives the right clamping plate and the rear clamping plate to form a synchronous clamping structure, a limiting disc is arranged below the workbench in parallel, and the limiting disc forms a rotating structure. And the limiting disc drives the ejection column to form a lifting structure. According to the clamping device for the machining center, the problems that a traditional clamping device is limited in angle and inconvenient to take workpieces are solved, the adaptive types of the workpieces are increased, the workpiece taking efficiency is improved, and the universality and the automation level of the machining center are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of clamping device technology, specifically a clamping device for machining centers. Background Technology

[0002] The clamping device for machining centers is a key component used to fix workpieces and ensure machining accuracy. It mainly consists of a clamping body, clamping elements, a power source, and a positioning mechanism. It can be adapted to various machining scenarios such as milling, drilling, and boring. It drives the clamping elements through hydraulic, pneumatic, or electric power to apply a stable clamping force to the workpiece, avoiding workpiece displacement or vibration during machining that could affect surface roughness. The device supports quick-change structures and is compatible with various workpiece shapes such as cuboids, shafts, and discs. It is a core piece of equipment in the precision manufacturing field to ensure machining quality and stability.

[0003] In existing clamping devices, such as the clamping device for a machining center with application number 202022132648.8, the technical solution is as follows: It includes a worktable, with support legs bolted to all four sides of the bottom of the worktable. A cover plate is bolted to the center of the front of the worktable, and a support frame is bolted to the top of the worktable. A controller is bolted to the center of the left side of the front of the support frame. A through groove is formed at the center of the right side of the top of the worktable, and limit holes are formed around the four sides of the right side of the support frame. This utility model, through the cooperation of a stepper motor, reducer, first gear, first rotating shaft, first tooth, fixing plate, groove, first pulley, slide rail, slide sleeve, slide rod, and second chuck, can clamp and fix the machined parts. However, existing clamping devices use a fixed angle positioning structure, which can only achieve single-angle clamping in the horizontal or vertical direction. After machining, the operator needs to use a copper rod to strike or manually disassemble the clamp to release the workpiece, which is quite troublesome.

[0004] In view of this, in-depth research was conducted on the above issues, which led to the creation of this case.

[0005] To address the aforementioned issues, an innovative design was developed based on the existing clamping device. Utility Model Content

[0006] The purpose of this invention is to provide a clamping device for machining centers to solve the problems mentioned in the background art, such as the limitation of workpiece clamping angle and the inability to automatically eject the workpiece.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A clamping device for a machining center includes a base. Four support columns are fixedly installed in the middle of the upper surface of the base, and a worktable is fixedly connected to the top of each support column. A circular hole is opened in the middle of the worktable, and an ejector column is inserted through the hole. Clamping plates are provided on the left, right, and rear sides of the worktable. A pneumatic telescopic mechanism is fixedly installed on the left side of the upper surface of the base. The pneumatic telescopic mechanism drives the left clamping plate to form a left-right moving structure, and the left clamping plate drives the right and rear clamping plates to form a synchronous clamping structure. A limiting plate is arranged parallel to the worktable below, and the limiting plate forms a rotating structure. The limiting plate drives the ejector column to form a lifting structure.

[0009] Preferably, the right output end of the pneumatic telescopic machine is connected to a first movable plate, and a second movable plate is symmetrically arranged on the right side of the first movable plate, and a third movable plate is arranged on the rear side of the middle position of the first movable plate and the second movable plate.

[0010] Using the above technical solution, the pneumatic telescopic machine drives the first moving plate, and through the symmetrically arranged second and third moving plates, realizes the synchronous movement of the three-way clamping plate, which can clamp the workpiece on three sides, thus expanding the clamping range.

[0011] Preferably, the bottom of the first moving plate, the second moving plate and the third moving plate are all fixedly installed with sliders, and the upper surface of the device base is provided with three first sliding grooves, and the bottom sliders of the first moving plate, the second moving plate and the third moving plate are all slidably connected to the first sliding grooves.

[0012] Using the above technical solution, the sliders at the bottom of the first moving plate, the second moving plate, and the third moving plate cooperate with the first sliding groove to ensure smooth movement, reduce workpiece offset during clamping, and improve machining positioning accuracy.

[0013] Preferably, clamping plates are fixedly installed on the upper surfaces of the first, second, and third movable plates, and limit posts are fixedly installed on the upper surfaces of the first, second, and third movable plates near the center of the worktable.

[0014] Using the above technical solution, the limiting post is fixed to the upper surface of each moving plate and passes through the limiting groove of the limiting plate as the clamping plate moves. Guided by the trajectory of the curved limiting groove, the three clamping plates move towards the center at the same time, improving the stability of clamping.

[0015] Preferably, the surface of the limiting plate is provided with three limiting grooves, and the limiting grooves are curved, and the limiting posts all penetrate through the limiting grooves.

[0016] By adopting the above technical solution, the trajectory design of the curved limiting groove enables the limiting column to drive the limiting disk to rotate during the movement. Guided by the trajectory of the curved limiting groove, the three clamping plates move towards the center at the same time, improving the stability of clamping.

[0017] Preferably, the limiting disk is rotatably connected above the rotating cylinder, and the rotating cylinder is fixedly installed on the upper surface of the device base. The limiting disk has a threaded groove in the middle, and a threaded post is threadedly connected inside the threaded groove.

[0018] Using the above technical solution, the limiting plate is fixed to the device base by a rotating cylinder. The threaded groove and the threaded column cooperate. The trajectory design of the curved limiting groove enables the limiting column to drive the limiting plate to rotate during the movement. Then, the lifting and lowering of the ejector column is controlled by the threaded transmission, so as to achieve the linkage effect of automatic lowering of the ejector column to avoid the machining area after the clamping action is completed, thus avoiding interference with the movement of the tool and adapting to the ejection requirements of workpieces of different thicknesses.

[0019] Preferably, the ejector post is fixedly installed on the top of the threaded post, and slide bars are fixedly installed on the left and right sides below the threaded post. The inside of the rotating drum is provided with second slide grooves on the left and right sides, and the threaded post passes through the inside of the rotating drum, and the slide bars are slidably connected to the second slide grooves.

[0020] By adopting the above technical solution, the slide bar of the threaded column and the second slide groove of the rotating drum slide together, which restricts the rotational freedom of the threaded column, ensures that the ejector column moves only in the vertical direction, avoids workpiece scratches caused by rotation, and ensures a smooth ejection process without shaking.

[0021] Compared with the prior art, the beneficial effects of this utility model are: the clamping device used in this machining center,

[0022] 1. Multi-dimensional clamping and angle self-adaptation: The three-way clamping plates are moved synchronously by a pneumatic telescopic mechanism. With the linkage of the trajectory of the limiting post and the curved limiting groove, the three clamping plates move towards the center at the same time, which improves the stability of clamping, solves the limitation of single-angle clamping of traditional devices, and improves the variety of workpieces that can be adapted.

[0023] 2. Automatic ejection and machining avoidance: After machining, the trajectory design of the curved limiting groove causes the limiting column to drive the limiting plate to rotate in the opposite direction during the movement. The threaded column drives the ejector column to rise, ejecting the workpiece from the round hole of the worktable. There is no need to manually knock or disassemble the fixture, which improves the efficiency of picking up the workpiece. During the machining process, the ejector column automatically descends to the bottom of the worktable to avoid interfering with the tool path and improve machining safety. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a partial structural diagram of the lower part of the workbench of this utility model;

[0026] Figure 3 This is a partial structural diagram of the lower part of the limiting plate of this utility model;

[0027] Figure 4 This is a schematic diagram of the limiting disc structure of this utility model;

[0028] Figure 5 This is a schematic diagram of the top column connection structure of this utility model.

[0029] In the diagram: 1. Device base; 2. Support column; 3. Workbench; 4. Circular hole; 5. Pneumatic telescopic mechanism; 6. First moving plate; 7. First slide groove; 8. Limiting column; 9. Limiting plate; 10. Limiting groove; 11. Threaded groove; 12. Second moving plate; 13. Third moving plate; 14. Clamping plate; 15. Rotary drum; 16. Second slide groove; 17. Threaded column; 18. Sliding bar; 19. Ejector column. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-5 This utility model provides a technical solution:

[0032] A clamping device for a machining center includes a base 1. Four support columns 2 are fixedly installed in the middle of the upper surface of the base 1, and a worktable 3 is fixedly connected to the top of the support columns 2. A circular hole 4 is opened in the middle of the worktable 3, and an ejector column 19 is inserted through the circular hole 4. Clamping plates 14 are provided on the left, right and rear sides of the worktable 3. A pneumatic telescopic mechanism 5 is fixedly installed on the left side of the upper surface of the base 1. The pneumatic telescopic mechanism 5 drives the left clamping plate 14 to form a left and right moving structure. The left clamping plate 14 drives the right and rear clamping plates 14 to form a synchronous clamping structure. A limiting plate 9 is arranged parallel to the bottom of the worktable 3. The limiting plate 9 forms a rotating structure and drives the ejector column 19 to form a lifting structure.

[0033] The pneumatic telescopic machine 5 has a first movable plate 6 connected to its right output end, and a second movable plate 12 is symmetrically arranged on the right side of the first movable plate 6. A third movable plate 13 is arranged on the rear side of the middle position of the first movable plate 6 and the second movable plate 12. Slider blocks are fixedly installed at the bottom of the first movable plate 6, the second movable plate 12 and the third movable plate 13. Three first sliding grooves 7 are opened on the upper surface of the device base 1. The sliders at the bottom of the first movable plate 6, the second movable plate 12 and the third movable plate 13 are slidably connected to the first sliding grooves 7. The pneumatic telescopic machine 5 drives the first movable plate 6 and realizes the synchronous movement of the three-way clamping plate 14 through the symmetrically arranged second movable plate 12 and the third movable plate 13. The workpiece can be clamped on three sides, and the clamping range is expanded. The sliders at the bottom of the first movable plate 6, the second movable plate 12 and the third movable plate 13 cooperate with the first sliding grooves 7 to ensure smooth movement, reduce workpiece offset during the clamping process and improve processing positioning accuracy.

[0034] Clamping plates 14 are fixedly installed on the upper surfaces of the first moving plate 6, the second moving plate 12, and the third moving plate 13. Limiting posts 8 are fixedly installed on the upper surfaces of the first moving plate 6, the second moving plate 12, and the third moving plate 13 near the center of the worktable 3. The surface of the limiting plate 9 has three limiting grooves 10, and the limiting grooves 10 are curved. The limiting posts 8 all pass through the limiting grooves 10. The limiting posts 8 are fixed to the upper surface of each moving plate and pass through the limiting grooves 10 of the limiting plate 9 when the clamping plate 14 moves. Guided by the trajectory of the curved limiting grooves 10, the three clamping plates 14 move towards the center at the same time, improving the clamping stability. The trajectory design of the curved limiting grooves 10 causes the limiting posts 8 to drive the limiting plate 9 to rotate during the movement. Guided by the trajectory of the curved limiting grooves 10, the three clamping plates 14 move towards the center at the same time, improving the clamping stability.

[0035] The limiting disc 9 is rotatably connected above the rotating cylinder 15, and the rotating cylinder 15 is fixedly installed on the upper surface of the device base 1. A threaded groove 11 is formed in the middle of the limiting disc 9, and a threaded post 17 is threadedly connected inside the threaded groove 11. An ejector post 19 is fixedly installed at the top of the threaded post 17, and slide bars 18 are fixedly installed on the left and right sides below the threaded post 17. Second slide grooves 16 are formed on the left and right sides inside the rotating cylinder 15, and the threaded post 17 penetrates through the rotating cylinder 15. The slide bars 18 are slidably connected to the second slide grooves 16. The limiting disc 9 is fixed to the device base 1 via the rotating cylinder 15. The threaded groove 11 cooperates with the threaded column 17. The trajectory design of the curved limiting groove 10 causes the limiting column 8 to drive the limiting disk 9 to rotate during the movement. Then, the lifting column 19 is controlled to rise and fall through the threaded transmission, realizing the linkage effect of automatic descent of the lifting column 19 to avoid the machining area after the clamping action is completed. This avoids interference with the movement of the tool and adapts to the ejection requirements of workpieces of different thicknesses. The slide bar 18 of the threaded column 17 slides in cooperation with the second slide groove 16 of the rotating drum 15 to ensure that the lifting column 19 moves only in the vertical direction, avoiding scratches on the workpiece due to rotation. The ejection process is smooth and without shaking.

[0036] Working principle:

[0037] In use, the workpiece is placed on the upper surface of the workbench 3, the pneumatic telescopic mechanism 5 is started, and the first moving plate 6 is pushed to the right. The upper surface of the first moving plate 6 drives the limiting post 8 to move to the right. The limiting post 8 slides along the curved limiting groove 10 of the limiting plate 9, causing the limiting plate 9 to rotate. Then, the other two limiting grooves 10 respectively drive the limiting post 8 above the second moving plate 12 and the third moving plate 13 to move, thereby driving the clamping plate 14 above the second moving plate 12 and the third moving plate 13 to move closer to the workpiece, thereby clamping and fixing the workpiece in three directions. After processing, the pneumatic telescopic mechanism 5 retracts, the clamping plate 14 releases the workpiece, and at the same time, the limiting plate 9 rotates in the opposite direction. The threaded post 17 drives the ejector post 19 to rise, pushing the workpiece out of the round hole 4, which is convenient for the operator to quickly pick up the part.

[0038] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0039] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping device for a machining center, comprising a device base (1), wherein four support columns (2) are fixedly mounted on the middle of the upper surface of the device base (1), and a worktable (3) is fixedly connected to the top of each support column (2), characterized in that: The workbench (3) has a circular hole (4) in the middle, and an ejector column (19) is installed through the circular hole (4). Clamping plates (14) are provided on the left, right and rear sides of the workbench (3). A pneumatic telescopic machine (5) is fixedly installed on the left side of the upper surface of the device base (1). The pneumatic telescopic machine (5) drives the left clamping plate (14) to form a left and right moving structure. The left clamping plate (14) drives the right and rear clamping plates (14) to form a synchronous clamping structure. A limiting plate (9) is arranged parallel to the bottom of the workbench (3). The limiting plate (9) forms a rotating structure. The limiting plate (9) drives the ejector column (19) to form a lifting structure.

2. A clamping device for machining centers according to claim 1, characterized in that: The pneumatic telescopic machine (5) has a first movable plate (6) connected to its right output end, and a second movable plate (12) is symmetrically arranged on the right side of the first movable plate (6), and a third movable plate (13) is arranged on the rear side of the middle position of the first movable plate (6) and the second movable plate (12).

3. A clamping device for machining centers according to claim 2, characterized in that: The bottom of the first moving plate (6), the second moving plate (12) and the third moving plate (13) are all fixedly installed with sliders, and the upper surface of the device base (1) is provided with three first sliding grooves (7), and the bottom sliders of the first moving plate (6), the second moving plate (12) and the third moving plate (13) are all slidably connected to the first sliding grooves (7).

4. A clamping device for a machining center according to claim 3, characterized in that: Clamping plates (14) are fixedly installed on the upper surfaces of the first moving plate (6), the second moving plate (12) and the third moving plate (13), and limit posts (8) are fixedly installed on the upper surfaces of the first moving plate (6), the second moving plate (12) and the third moving plate (13) near the center of the workbench (3).

5. A clamping device for machining centers according to claim 4, characterized in that: The limiting plate (9) has three limiting grooves (10) on its surface, and the limiting grooves (10) are curved, and the limiting posts (8) all pass through the limiting grooves (10).

6. A clamping device for machining centers according to claim 5, characterized in that: The limiting disk (9) is rotatably connected above the rotating cylinder (15), and the rotating cylinder (15) is fixedly installed on the upper surface of the device base (1). The limiting disk (9) has a threaded groove (11) in the middle, and a threaded column (17) is threaded inside the threaded groove (11).

7. A clamping device for machining centers according to claim 6, characterized in that: The ejector column (19) is fixedly installed on the top of the threaded column (17), and slide bars (18) are fixedly installed on the left and right sides below the threaded column (17). The rotating drum (15) has a second slide groove (16) on the left and right sides inside, and the threaded column (17) passes through the inside of the rotating drum (15), and the slide bar (18) is slidably connected to the second slide groove (16).

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