Clamping jig for CNC machining

Abstract

The utility model relates to the technical field of CNC (computer numerical control) processing, in particular to a clamping jig for CNC processing, which comprises a clamping jig main body, two symmetrically arranged top plates are mounted on the upper side of the clamping jig main body, clamping seat shafts are rotatably connected to the inner side surfaces of the two top plates, a tool frame is clamped between the two clamping seat shafts, driven gears are connected to the outer surfaces of the clamping seat shafts, and the driven gears are connected to the upper side of the clamping jig main body. The tool frame can be conveniently clamped and fixed through the reinforcing inserting plates, meanwhile, all workpieces in the tool frame can be rapidly taken down, the tool frame can be driven to rotate along with the two clamping base shafts, the bottom faces of the workpieces can be turned upwards, CNC machining can be conveniently conducted on the two faces of each workpiece, the workpieces do not need to be fixed again, time and labor are saved, and the machining efficiency is improved. The clamping jig can automatically adjust the machining position of a workpiece, the CNC machining efficiency is improved, and when the threaded transverse plates move oppositely or relatively, the two movable clamping blocks can adaptively clamp workpieces of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC machining, in particular to a clamping fixture for CNC machining. Background Art

[0002] CNC machining is a process that uses digitally controlled machine tools to perform precision machining. Due to its high efficiency, accuracy and reliability, it has been widely used in many fields. In addition, CNC machining is also widely used in mold manufacturing, medical device manufacturing and other fields, which requires the use of clamping fixtures to fix the workpiece.

[0003] The prior art discloses patent application number "CN202021553431.8", a clamping fixture for CNC machining, including a workbench, a clamping body is provided on the top of the workbench, a clamping structure is provided inside the clamping body, and a fixing device is provided on both sides of the clamping body on the top of the workbench. Through the action of the clamping rod, clamping strip, elastic spring, positioning block, pressing rod, reset spring and fixing block, the entire device can clamp parts of different sizes, facilitate the processing of parts of different sizes, and improve the practicality of the device.

[0004] This clamping fixture can only clamp parts of different sizes. In actual use, the clamping fixture usually only allows one side of the workpiece to face upward for CNC machining. If the bottom surface of the workpiece needs to be machined, the workpiece needs to be re-fixed, which is time-consuming and labor-intensive. It makes it inconvenient for the clamping fixture to automatically adjust the processing position of the workpiece, affecting the progress of CNC machining and making it inconvenient to use. Utility Model Content

[0005] The purpose of the present invention is to provide a CNC machined clamping fixture to solve the problems raised in the above background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A CNC machined clamping fixture comprises a clamping fixture body, two symmetrically arranged top plates are mounted on the upper side of the clamping fixture body, the inner side surfaces of the two top plates are rotatably connected to a clamping base shaft, a tooling frame is clamped between the two clamping base shafts, the outer surface of the clamping base shaft is connected to a driven gear, and one side of the top plate is rotatably connected to a gear rod;

[0008] The right side of the gear rotating rod is fixedly connected to the servo motor through the motor mounting plate. The upper sides of the two card seat shafts are clamped with reinforcement plug-in plates for fixing the tooling frame. Two connecting plates are connected to both ends of the tooling frame. One side of the four connecting plates is slidably connected with a positioning protrusion for fixing the reinforcement plug-in plates. A first spring is fixedly connected between the four positioning protrusions and the connecting plates.

[0009] Preferably, the internal rotation connection of the tooling frame is provided with a double-headed screw, the outer surface of the double-headed screw is threadedly connected to two symmetrically arranged threaded cross plates, one side of the two threaded cross plates is slidably connected to a second movable clamping block distributed in an array, a fourth spring is connected between the second movable clamping block and the threaded cross plate, the internal fixed connection of the tooling frame is provided with two connecting rods, the outer surfaces of the two connecting rods are slidably connected to the threaded cross plates, both ends of the double-headed screw pass through the tooling frame and extend to both ends of the tooling frame, and both ends of the double-headed screw are equipped with operating hand wheels.

[0010] Preferably, the inner side surface of the tooling frame is slidingly connected to a first movable clamp distributed in an array, a third spring is installed between the first movable clamp and the tooling frame, the insides of the first movable clamp and the second movable clamp are connected to L-shaped rubber pads, two plug posts are clamped at both ends of the tooling frame, one side of the two plug posts is fixedly connected to the mounting frame, the upper side of the mounting frame is connected to a second spring in an array, a support plate is fixedly installed on the upper side of the second spring, and circular grooves distributed in an array are opened inside the tooling frame.

[0011] Preferably, an L-shaped side plate is fixedly installed on one side of the four connecting plates, a round seat is connected to one side of the four positioning protruding rods, and a rubber round strip for fixing the round seat is installed inside the four L-shaped side plates.

[0012] Preferably, one side of the gear rod passes through the top plate and extends to the other side of the top plate, the driven gear and the gear rod are engaged with each other, and one side of the positioning protrusion passes through the connecting plate and extends to the other side of the connecting plate.

[0013] Preferably, two positioning grooves are provided on the inner side surfaces of the two reinforcing inserting plates, the positioning grooves are adapted to the positioning protrusions, and the outer surfaces of the positioning protrusions are snap-fitted to the inner side surfaces of the reinforcing inserting plates through the positioning grooves.

[0014] Beneficial effects of the utility model:

[0015] 1. The utility model facilitates the clamping and fixing of the fixture frame by utilizing a reinforced insert plate, and can also quickly remove all the workpieces in the fixture frame. As the two clamping shafts can drive the fixture frame to rotate, the bottom surface of the workpiece can be turned upward, so that both sides of the workpiece can be CNC machined conveniently without having to re-fix the workpiece, saving time and effort, so that the clamping fixture can automatically adjust the processing position of the workpiece, thereby improving the efficiency of CNC machining;

[0016] 2. The utility model allows the threaded cross plates to move toward or relative to each other, so that the two movable clamps can adaptively clamp and fix workpieces of different sizes. At the same time, the elastic support plate will also support the top of the workpiece, thereby ensuring the stability of the clamping fixture in fixing the workpiece and preventing the workpiece from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, it is possible for a person skilled in the art to derive other drawings based on these drawings without inventive effort.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This utility model Figure 1 Schematic diagram of the installation of the middle gear rotating rod and the driven gear;

[0021] Figure 4 This utility model Figure 1 A schematic structural diagram of the first movable clamping block, the second movable clamping block and the support plate;

[0022] The reference numerals in the figures are as follows:

[0023] 1. Clamping fixture body; 2. Top plate; 3. Clamping seat shaft; 4. Fixture frame; 5. Reinforcement plug plate; 6. Gear rod; 7. Servo motor; 8. Driven gear; 9. Connecting plate; 10. L-shaped side plate; 11. Positioning protrusion; 12. First spring; 13. Round seat; 14. Rubber round strip; 15. Insert column; 16. Mounting frame; 17. Second spring; 18. Support plate; 19. First movable clamping block; 20. Third spring; 21. Double-headed screw; 22. Connecting rod; 23. Operating handwheel; 24. Threaded cross plate; 25. Second movable clamping block; 26. Fourth spring; 27. Round groove; 28. L-shaped rubber pad; 99. Positioning groove. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figures 1 to 4As shown, a CNC machined clamping fixture includes a clamping fixture body 1, two symmetrically arranged top plates 2 are installed on the upper side of the clamping fixture body 1, the inner side surfaces of the two top plates 2 are rotatably connected to the base shaft 3, a tooling frame 4 is clamped between the two base shafts 3, the outer surface of the base shaft 3 is connected to the driven gear 8, and one side of the top plate 2 is rotatably connected to the gear rod 6;

[0026] The right side of the gear rotating rod 6 is fixedly connected to the servo motor 7 through the motor mounting plate. The upper sides of the two card seat shafts 3 are clamped with reinforcement plug plates 5 for fixing the tool frame 4. Two connecting plates 9 are connected to both ends of the tool frame 4. One side of the four connecting plates 9 is slidably connected with a positioning protrusion 11 for fixing the reinforcement plug plate 5. A first spring 12 is fixedly connected between the four positioning protrusions 11 and the connecting plate 9. Through the setting of the positioning protrusion 11, the positioning protrusion 11 can be used to limit and fix the reinforcement plug plate 5, so that the reinforcement plug plate 5 can more firmly position the tool frame 4, so that the entire clamping fixture can be used more stably and reliably.

[0027] The internal rotation of the tooling frame 4 is connected with a double-headed screw rod 21, and the outer surface of the double-headed screw rod 21 is threadedly connected with two symmetrically arranged threaded cross plates 24. One side of the two threaded cross plates 24 is slidably connected with a second movable clamping block 25 distributed in an array. Through the installation and use of the first movable clamping block 19 and the second movable clamping block 25, two sets of movable clamping blocks can be used to clamp workpieces in batches, so that the workpieces can be stably fixed in the tooling frame 4. At the same time, it is convenient to perform CNC processing on both sides of the workpiece, thereby improving processing efficiency. The second movable clamping block 25 is connected to the threaded cross plate 24. Four springs 26, two connecting rods 22 are fixedly connected to the interior of the tooling frame 4, and the outer surfaces of the two connecting rods 22 are slidingly connected to the threaded cross plate 24. Both ends of the double-headed screw rod 21 pass through the tooling frame 4 and extend to both ends of the tooling frame 4. Both ends of the double-headed screw rod 21 are equipped with operating hand wheels 23. Through the setting of the connecting rod 22, the two connecting rods 22 can limit the moving trajectory of the two threaded cross plates 24, so that the two threaded cross plates 24 can move smoothly. In this way, the clamping position of the second movable clamping block 25 can be moved and adjusted to clamp workpieces of different sizes, which is easy to use.

[0028] The inner side surface of the tooling frame 4 is slidably connected with a first movable clamping block 19 distributed in an array, and a third spring 20 is installed between the first movable clamping block 19 and the tooling frame 4. The insides of the first movable clamping block 19 and the second movable clamping block 25 are both connected with L-shaped rubber pads 28. The L-shaped rubber pads 28 can increase the friction between the workpiece and the two movable clamping blocks, so that the two movable clamping blocks can firmly clamp the workpiece. Two plug-in columns 15 are clamped at both ends of the tooling frame 4, and one side of the two plug-in columns 15 is fixedly connected to the mounting frame 16. The upper side of the mounting frame 16 is connected to the second spring 17 in an array, and the upper side of the second spring 17 is fixedly installed with a support plate 18. Through the setting of the support plate 18, the installation position of the mounting frame 16 can be adjusted by using the plug-in columns 15, so that the mounting frame 16 can be located below the tooling frame 4, so that the support plate 18 can always support and fix the workpiece, and the inside of the tooling frame 4 is provided with circular grooves 27 distributed in an array.

[0029] An L-shaped side plate 10 is fixedly installed on one side of the four connecting plates 9, and a round seat 13 is connected to one side of the four positioning protrusions 11. A rubber round strip 14 for fixing the round seat 13 is installed inside the four L-shaped side plates 10. By installing and using the round seat 13 and the rubber round strip 14, the mobile round seat 13 can drive the positioning protrusion 11 away from the reinforcement plug-in plate 5, so that the round seat 13 can be snap-fitted and positioned inside the rubber round strip 14 to limit and fix the entire positioning protrusion 11, which makes it easy to release the limit on the reinforcement plug-in plate 5 and facilitate the disassembly of the tooling frame 4 at the two card seat shafts 3.

[0030] One side of the gear rod 6 passes through the top plate 2 and extends to the other side of the top plate 2 , the driven gear 8 and the gear rod 6 are engaged with each other, and one side of the positioning protrusion 11 passes through the connecting plate 9 and extends to the other side of the connecting plate 9 .

[0031] The inner side surfaces of the two reinforcing inserting plates 5 are each provided with two positioning grooves 99 , which are matched with the positioning protrusions 11 , and the outer surface of the positioning protrusions 11 is engaged with the inner side surfaces of the reinforcing inserting plates 5 through the positioning grooves 99 .

[0032] The working principle of the CNC machined clamping fixture provided by this utility model is as follows:

[0033] The tool holder 4 is clamped to the inside of the two card seat shafts 3, and the two reinforcement inserting plates 5 are inserted into the card seat shaft 3 and the tool holder 4 to preliminarily fix the tool holder 4, and then the four round seats 13 are pushed respectively, so that the four positioning protrusions 11 installed with the first spring 12 can be released and moved. In this way, the elastic force of the first spring 12 is used to allow the four positioning protrusions 11 to automatically clamp to the positioning grooves 99 of the reinforcement inserting plates 5, so as to further clamp and fix the tool holder 4, ensuring the stability of the tool holder 4 when in use, and at the same time, all the workpieces in the tool holder 4 can be quickly removed, and then the output shaft of the servo motor 7 drives the gear rotating rod 6 to rotate. At this time, the gear rotating rod 6 can drive the meshing driven gear 8 to rotate, so that the two card seat shafts 3 can drive the tool holder 4 to rotate, so that the bottom surface of the workpiece can be turned upward, so that CNC processing can be conveniently performed on both sides of the workpiece without having to re-fix the workpiece, saving time and effort, thereby allowing the clamping fixture to automatically adjust the processing position of the workpiece, thereby improving the efficiency of CNC processing;

[0034] By clamping the two plug posts 15 onto the tooling frame 4, the two support plates 18 with the second spring 17 installed at the mounting frame 16 can be driven to be fixed inside the tooling frame 4, and then the operating handwheel 23 is rotated. The operating handwheel 23 can drive the double-headed screw 21 to rotate, so that the two threaded cross plates 24 on the double-headed screw 21 can be adjusted and moved. When the two threaded cross plates 24 move toward each other, the first movable clamping block 19 and the second movable clamping block 25 with elastic force can clamp smaller workpieces. When the two threaded cross plates 24 move relative to each other, the first movable clamping block 19 and the second movable clamping block 25 with elastic force can clamp larger workpieces, thereby adaptively clamping and fixing workpieces of different sizes. At the same time, the elastic support plate 18 will also support the top of the workpiece, thereby ensuring the stability of the clamping fixture in fixing the workpiece, so that the workpiece is not easy to loosen.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A CNC machined clamping fixture, comprising a clamping fixture body (1), characterized in that: Two symmetrically arranged top plates (2) are mounted on the upper side of the clamping fixture body (1); the inner side surfaces of the two top plates (2) are rotatably connected to a clamping base shaft (3); a tooling frame (4) is clamped between the two clamping base shafts (3); the outer surface of the clamping base shaft (3) is connected to a driven gear (8); and one side of the top plate (2) is rotatably connected to a gear rotating rod (6); The right side of the gear rotating rod (6) is fixedly connected to a servo motor (7) via a motor mounting plate, the upper sides of the two card seat shafts (3) are clamped with a reinforcing plug plate (5) for fixing the tooling frame (4), both ends of the tooling frame (4) are connected to two connecting plates (9), one side of the four connecting plates (9) is slidably connected to a positioning protrusion (11) for fixing the reinforcing plug plate (5), and a first spring (12) is fixedly connected between the four positioning protrusions (11) and the connecting plates (9).

2. A CNC machined clamping fixture according to claim 1, characterized in that: The interior of the tooling frame (4) is rotatably connected to a double-headed screw rod (21), and the outer surface of the double-headed screw rod (21) is threadedly connected to two symmetrically arranged threaded cross plates (24), and one side of the two threaded cross plates (24) is slidably connected to a second movable clamping block (25) distributed in an array, and a fourth spring (26) is connected between the second movable clamping block (25) and the threaded cross plate (24). The interior of the tooling frame (4) is fixedly connected to two connecting rods (22), and the outer surfaces of the two connecting rods (22) are slidably connected to the threaded cross plate (24). Both ends of the double-headed screw rod (21) pass through the tooling frame (4) and extend to both ends of the tooling frame (4), and both ends of the double-headed screw rod (21) are installed with an operating hand wheel (23).

3. The CNC machined clamping fixture according to claim 1, characterized in that: The inner side surface of the tooling frame (4) is slidably connected to a first movable clamp (19) distributed in an array, a third spring (20) is installed between the first movable clamp (19) and the tooling frame (4), the insides of the first movable clamp (19) and the second movable clamp (25) are both connected with L-shaped rubber pads (28), two plug posts (15) are clamped at both ends of the tooling frame (4), one side of the two plug posts (15) is fixedly connected to a mounting frame (16), the upper side of the mounting frame (16) is connected to a second spring (17) in an array, the upper side of the second spring (17) is fixedly installed with a support plate (18), and the inside of the tooling frame (4) is provided with a circular groove (27) distributed in an array.

4. The CNC machined clamping fixture according to claim 1, characterized in that: An L-shaped side plate (10) is fixedly installed on one side of the four connecting plates (9), a round seat (13) is connected to one side of the four positioning protruding rods (11), and a rubber round strip (14) for fixing the round seat (13) is installed inside the four L-shaped side plates (10).

5. The CNC machined clamping fixture according to claim 1, characterized in that: One side of the gear rotating rod (6) passes through the top plate (2) and extends to the other side of the top plate (2); the driven gear (8) and the gear rotating rod (6) are engaged with each other; one side of the positioning protruding rod (11) passes through the connecting plate (9) and extends to the other side of the connecting plate (9).

6. The CNC machined clamping fixture according to claim 1, characterized in that: The inner side surfaces of the two reinforcing insert plates (5) are each provided with two positioning grooves (99), the positioning grooves (99) being adapted to the positioning protrusions (11), and the outer surface of the positioning protrusions (11) being snap-connected to the inner side surfaces of the reinforcing insert plates (5) via the positioning grooves (99).

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