High-precision clamping mechanism for numerical control drill chuck tooling

Abstract

The utility model relates to chuck frock field, concretely relates to a high accuracy clamping mechanism for numerical control drill chuck frock, its technical scheme is: including three -jaw chuck and dog, the dog sets up at three -jaw chuck end face, three -jaw chuck end face is connected with baffle, the baffle middle is provided with the center hole, the inside connection of center hole has fixed component, the fixed component front screw thread connection has centre, the utility model has the beneficial effect that: baffle and movable baffle piece constitute follow -up type protective cover, always keep the slide groove closed in the dog opening and closing process, thoroughly solve the wear and tear and oil line blockage problem that the iron filings, coolant enter the inner cavity of main shaft causes, fixed component and centre form rigid axial reference, cooperate centre conical surface radial positioning, work piece once clamping is completed end face lamination adds centering.

Description

Technical Field

[0001] This utility model relates to the field of chuck tooling, specifically to a high-precision clamping mechanism for CNC drilling chuck tooling. Background Technology

[0002] CNC drilling chucks are a key system for achieving precision drilling, and their performance directly affects machining accuracy, efficiency, and automation levels. This fixture system typically consists of a chuck body, drive unit, positioning components, and auxiliary control system. It must meet the stability, repeatability, and flexibility requirements of high-speed drilling scenarios. In CNC drilling, milling, and turning, three-jaw chucks are widely used for rapid workpiece clamping due to their simple structure and quick clamping. However, in actual use, existing three-jaw chucks generate a large amount of iron and aluminum chips and high-pressure coolant during workpiece machining. These chips and coolant easily enter the spindle cavity along the jaw grooves and the chuck's center hole, causing accelerated wear of the chuck's internal threads and wedges, and even clogging the hydraulic rotary cylinder's oil circuit, reducing the stability of the clamping force. Current technologies use rubber plugs or grease to seal the center hole, but frequent disassembly and assembly are time-consuming and labor-intensive, and the sealing material is prone to aging and falling off, resulting in unsatisfactory protective effects.

[0003] Therefore, it is necessary to invent a high-precision clamping mechanism for CNC drill chuck tooling. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-precision clamping mechanism for CNC drill chuck tooling, comprising a three-jaw chuck and jaws, wherein the jaws are disposed on the end face of the three-jaw chuck, a baffle is connected to the end face of the three-jaw chuck, a central hole is provided in the middle of the baffle, a fixing component is connected inside the central hole, and a center is threadedly connected to the front of the fixing component.

[0006] Based on the above features: a three-jaw chuck can clamp and fix workpieces using its jaws. Before clamping the workpiece, a baffle can be placed over the front of the three-jaw chuck to protect the end face and prevent material from being blocked. Then, the fixing component is connected to the center hole in the baffle, and the center can be tightened to one end of the fixing component, achieving high-precision positioning between the end face and the center. When the center is tightened... Preferably, the baffle surface is uniformly provided with limiting grooves, the limiting grooves are matched with the claws, and a movable baffle is provided inside the limiting grooves.

[0007] Based on the above features: when the baffle covers the end face of the three-jaw chuck, the jaws need to be inserted into the inner side of the three limiting slots. When the jaws move towards the center of the three-jaw chuck, the movable baffle can be squeezed and contracted. When the jaws move away from the center of the three-jaw chuck, the movable baffle can extend and retract, which facilitates dust prevention and material blocking of the center of the three-jaw chuck and the sliding groove below the jaws.

[0008] Preferably, the inner wall of the central hole is provided with internal threads.

[0009] Based on the above features, it is convenient to insert the fixing component into the center hole thread for locking.

[0010] Preferably, the fixing assembly includes a first fixing rod, a second fixing rod, and a third fixing rod. The first fixing rod, the second fixing rod, and the third fixing rod are an integral tubular structure. The second fixing rod and the third fixing rod are both open at both ends, and the first fixing rod is sealed at one end and open at the other end.

[0011] Based on the above features: the end of the first fixing rod away from the second fixing rod is sealed, the inner wall of the third fixing rod is provided with internal threads, and one end of the tip is provided with a stud. The tip can be inserted into the middle of the third fixing rod through the stud, so that the two can be threadedly locked.

[0012] Preferably, a magnet A is fixedly welded to the inner wall of the first fixing rod on the side away from the second fixing rod, a guide block is slidably connected inside the first fixing rod, and a magnet B is fixedly welded to the end of the guide block near the magnet A.

[0013] Based on the above characteristics: the guide block can move through the inner cavities of the first, second, and third fixed rods. When the tip is locked by inserting the stud into the middle thread of the third fixed rod, the guide block will be squeezed back into the inner cavity of the first fixed rod. When the tip is unscrewed to separate the stud from the third fixed rod, the guide block can extend outward through the second and third fixed rods. Since the magnetic poles of magnets A and B are opposite and they are installed in opposite directions, magnet A can bounce magnet B when there is no pressure pressing on the guide block, causing the guide block to extend outward.

[0014] Preferably, the guide block has a straight groove on its surface.

[0015] Based on the above features: to prevent the guide block from separating from the first fixed rod, the second fixed rod, and the third fixed rod when it slides.

[0016] Preferably, the outer wall of the second fixing rod is provided with external threads, and a positioning slider is fixedly welded to the inner wall of the second fixing rod on the side near the third fixing rod.

[0017] Based on the above features: when the entire fixing assembly passes through the central hole, the second fixing rod can be locked with the central hole thread in the middle of the baffle by the external thread on the outer wall. At this time, the first fixing rod will be inserted in the middle of the three-jaw chuck, while the third fixing rod is located on the side of the baffle away from the three-jaw chuck. The positioning slider is slidably connected with the straight groove, which facilitates the translation and sliding of the guide block.

[0018] The beneficial effects of this utility model are: The baffle and the movable baffle form a follow-up protective cover. The slide groove is always closed during the opening and closing of the chuck, which completely solves the problem of wear and oil circuit blockage caused by iron filings and coolant entering the spindle cavity. The fixed component and the center form a rigid axial reference, which, together with the radial positioning of the center conical surface, allows the workpiece to complete the end face fitting and center alignment in one clamping.

[0019] When the top is tightened, the guide block stores energy. When the clamp is loosened, the magnetic force is released and the guide block automatically extends to eject the workpiece. The robot arm can grasp it with zero collision. The fixing component is threadedly connected to the baffle. The top and guide block can be replaced by hand. For workpieces of different lengths, only the top needs to be replaced or the extension of the top needs to be adjusted. There is no need to disassemble the whole tray, realizing flexible production of one person and multiple machines. Attached Figure Description

[0020] Figure 1 A disassembled diagram of a three-jaw chuck and baffle for a high-precision clamping mechanism for a CNC drilling chuck tooling provided by this utility model; Figure 2 This utility model provides a disassembled diagram of the baffle, fixing components and center of a high-precision clamping mechanism for a CNC drill chuck tooling; Figure 3 A diagram showing the retracted state of the guide block of a high-precision clamping mechanism for a CNC drill chuck tooling provided by this utility model; Figure 4 This utility model provides a diagram showing the extended state of the guide block of a high-precision clamping mechanism for a CNC drill chuck tooling.

[0021] In the diagram: 1. Three-jaw chuck; 2. Jaw; 3. Baffle; 31. Limiting groove; 32. Movable baffle; 4. Center hole; 5. Fixing assembly; 51. First fixing rod; 511. Magnet A; 512. Guide block; 5121. Straight groove; 513. Magnet B; 52. Second fixing rod; 521. Positioning slider; 53. Third fixing rod; 6. Center. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] See attached document Figure 1-4This utility model provides a high-precision clamping mechanism for CNC drilling chuck tooling, including a three-jaw chuck 1 and jaws 2. The jaws 2 are disposed on the end face of the three-jaw chuck 1. The three-jaw chuck 1 can use the jaws 2 to clamp and fix the workpiece. A baffle 3 is connected to the end face of the three-jaw chuck 1 to cover the end face of the three-jaw chuck 1 for protection and material blocking. Limiting grooves 31 are evenly opened on the surface of the baffle 3. The limiting grooves 31 match the jaws 2. A movable baffle 32 is provided inside the limiting grooves 31. When the baffle 3 covers the end face of the three-jaw chuck 1, the jaws 2 need to be inserted into the inside of the three limiting grooves 31. When the jaws 2 move towards the center of the three-jaw chuck 1, the movable baffle 32 can be squeezed and contracted. When the jaws 2 move away from the center of the three-jaw chuck 1, the movable baffle 32 can be extended and retracted to facilitate dust prevention and material blocking of the center of the three-jaw chuck 1 and the sliding groove below the jaws 2. The baffle 3 has a central hole 4 in the middle, and a fixing component 5 is connected inside the central hole 4. The fixing component 5 has a center point 6 threadedly connected to its front side. Before clamping the workpiece, the baffle 3 can be placed on the front side of the three-jaw chuck 1 first, and then the fixing component 5 can be connected to the central hole 4 in the middle of the baffle 3. The fixing component 5 includes a first fixing rod 51, a second fixing rod 52 and a third fixing rod 53. The first fixing rod 51, the second fixing rod 52 and the third fixing rod 53 are an integral tubular structure. The second fixing rod 52 and the third fixing rod 53 are both open at both ends. The first fixing rod 51 is sealed at one end and open at the other end. The end of the first fixing rod 51 away from the second fixing rod 52 is sealed. The inner wall of the third fixing rod 53 has an internal thread, and one end of the center point 6 is provided with a stud. The center point 6 can be inserted into the middle of the third fixing rod 53 through the stud, so that the two can be threadedly locked.

[0024] A magnet A511 is fixedly welded to the inner wall of the first fixing rod 51 on the side away from the second fixing rod 52. A guide block 512 is slidably connected inside the first fixing rod 51. The guide block 512 can move through the inner cavities of the first fixing rod 51, the second fixing rod 52, and the third fixing rod 53. When the tip 6 is inserted into the middle thread of the third fixing rod 53 through the stud and locked, the guide block 512 will be squeezed back into the inner cavity of the first fixing rod 51. At this time, the tip 6 will form a fixed positioning outside the third fixing rod 53 to prevent axial displacement of the workpiece. When the tip 6 is unscrewed so that the stud is not screwed into the third fixing rod 53, the guide block 512 will be squeezed back into the inner cavity of the first fixing rod 51. At this time, the tip 6 will form a fixed positioning outside the third fixing rod 53 to prevent axial displacement of the workpiece. After separation, the guide block 512 can extend outward through the second fixing rod 52 and the third fixing rod 53. A magnet B513 is fixedly welded to one end of the guide block 512 near the magnet A511. Since the magnetic poles of magnet A511 and magnet B513 are opposite and installed in opposite directions, when there is no pressure pressing on the guide block 512, magnet A511 can rebound magnet B513, causing the guide block 512 to extend outward. When the guide block 512 extends outward (when the chuck 2 has released the workpiece), the processed workpiece can be automatically ejected, making it convenient for the robot to grab or for manual picking up and receiving. The inner wall of the central hole 4 is provided with an internal thread, and the outer wall of the second fixing rod 52 is provided with an external thread. When the entire fixing assembly 5 passes through the central hole 4, the second fixing rod 52 can be threadedly locked with the central hole 4 in the middle of the baffle 3 by the external thread on its outer wall. At this time, the first fixing rod 51 will be inserted in the middle of the three-jaw chuck 1, while the third fixing rod 53 is located on the side of the baffle 3 away from the three-jaw chuck 1. The inner wall of the second fixing rod 52 near the third fixing rod 53 is fixedly welded with a positioning slider 521. The surface of the guide block 512 is provided with a straight groove 5121. The positioning slider 521 is slidably connected with the straight groove 5121, which facilitates the translation and sliding of the guide block 512, and at the same time prevents the guide block 512 from separating from the first fixing rod 51, the second fixing rod 52 and the third fixing rod 53 when it slides.

[0025] The usage process of this utility model is as follows: The baffle 3 covers the end face of the three-jaw chuck 1, the jaws 2 pass through the limiting groove 31, and the movable baffle 32 extends and retracts with the radial movement of the jaws 2, always keeping the groove closed to achieve dynamic dust and chip prevention. The fixing component 5 is screwed into the center hole 4 of the baffle 3 through the external thread of the second fixing rod 52. The first fixing rod 51 extends into the spindle hole to form a rigid connection. After the tip 6 is screwed into the third fixing rod 53, its conical surface mates with the center hole 4 of the workpiece to complete the high-precision positioning of the end face and the center. When the tip 6 is screwed in... When tightened, the thread at the tail of the guide block 512 is pressed back into the inner cavity of the first fixing rod 51. Magnets A511 and B513 are opposite each other with the same pole. When the tip 6 is unscrewed and separated from the third fixing rod 53, the magnetic force is released. Under the magnetic repulsion, the guide block 512 extends quickly along the positioning slider 521 and the straight groove 5121, automatically ejecting the workpiece by 2-3mm, which is convenient for the robot or manual to pick up the workpiece. Throughout the process, the baffle 3 always closes the end face of the chuck, and the chips and coolant are completely isolated, ensuring both positioning accuracy and cleanliness.

[0026] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A high-precision clamping mechanism for a CNC drill chuck fixture, comprising a three-jaw chuck (1) and jaws (2), wherein the jaws (2) are disposed on the end face of the three-jaw chuck (1), characterized in that: The end face of the three-jaw chuck (1) is connected to a baffle (3), and a central hole (4) is provided in the middle of the baffle (3). A fixing component (5) is connected inside the central hole (4), and a center point (6) is threadedly connected to the front of the fixing component (5).

2. The high-precision clamping mechanism for a CNC drill chuck tooling according to claim 1, characterized in that: The baffle (3) has a limit groove (31) evenly opened on its surface. The limit groove (31) matches the claw (2). A movable baffle (32) is provided inside the limit groove (31).

3. The high-precision clamping mechanism for a CNC drill chuck tooling according to claim 1, characterized in that: The inner wall of the central hole (4) is provided with internal threads.

4. The high-precision clamping mechanism for a CNC drill chuck tooling according to claim 1, characterized in that: The fixing component (5) includes a first fixing rod (51), a second fixing rod (52) and a third fixing rod (53). The first fixing rod (51), the second fixing rod (52) and the third fixing rod (53) are an integral tubular structure. The second fixing rod (52) and the third fixing rod (53) are both open at both ends. The first fixing rod (51) is sealed at one end and open at the other end.

5. A high-precision clamping mechanism for a CNC drill chuck tooling according to claim 4, characterized in that: A magnet A (511) is fixedly welded to the inner wall of the first fixing rod (51) away from the second fixing rod (52). A guide block (512) is slidably connected inside the first fixing rod (51). A magnet B (513) is fixedly welded to the end of the guide block (512) near the magnet A (511).

6. The high-precision clamping mechanism for a CNC drill chuck tooling according to claim 5, characterized in that: The guide block (512) has a straight groove (5121) on its surface.

7. A high-precision clamping mechanism for a CNC drill chuck tooling according to claim 4, characterized in that: The second fixing rod (52) has an external thread on its outer wall, and a positioning slider (521) is fixedly welded to the inner wall of the side of the second fixing rod (52) near the third fixing rod (53).

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