Large-size numerical control longitudinal cutting bar clamping structure

Abstract

The utility model discloses a big specification numerical control longitudinal cutting bar stock clamping structure, including the cylinder, the output fixed connection of cylinder has piston rod, the outer surface of piston rod articulates has the shift fork, the outer surface articulation of shift fork has the pawl. This big specification numerical control longitudinal cutting bar stock clamping structure, through the setting of cylinder, push rod, chuck and cone sleeve, the telescopic movement of cylinder through piston rod provides power for whole clamping structure, makes clamping action can be fast, accurate execution, ensures the high efficiency and stability of clamping process, and the movement of open -and -close sliding sleeve can directly drive the movement of push rod and chuck, realizes the clamping and loosening of chuck to bar stock, and the spring further guarantees the stability and reliability of clamping, ensures that chuck can firmly clamps bar stock in the processing, through and two stage lever ratio's optimization design and the reasonable selection of cylinder, effectively solved big specification numerical control longitudinal cutting bar stock clamping unreliable and stable problem.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining technology, and in particular to a clamping structure for large-size CNC longitudinal cutting bar stock. Background Technology

[0002] Bar stock is a type of workpiece frequently used in the field of mechanical production and processing. During the production of bar stock, it is often processed by CNC lathes. In order to ensure the stability and accuracy of the CNC lathe in processing bar stock workpieces, a clamping mechanism is required to fix the bar stock workpiece.

[0003] A search revealed Chinese Patent Publication No. CN223083849U, which discloses a bar stock clamping mechanism for a CNC lathe. The mechanism includes a chuck with a first through hole at its center and a first cavity on one side of its interior. The first cavity communicates with the first through hole, and a protective fixing component and an auxiliary dust removal component are respectively installed inside the first cavity. In this invention, a drive motor rotates a shaft, a first lead screw, and a second lead screw, causing two threaded sleeves to respectively move a flat plate, an arc-shaped block, a spring, and a flexible plate relative to each other. The flexible plate provides auxiliary clamping and fixing of the long bar stock, further improving the clamping and fixing effect.

[0004] Although the aforementioned patent can clamp the bar stock, the chuck may loosen or the bar stock may shift during the processing, leading to a decrease in processing accuracy and even damage to the cutting tools and equipment. It suffers from problems such as unstable clamping and poor reliability, making it difficult to meet the requirements of high-precision processing. Therefore, it is necessary to design a large-scale CNC longitudinal cutting bar stock clamping structure to solve the above problems. Utility Model Content

[0005] The main purpose of this utility model is to provide a clamping structure for large-size CNC longitudinal cutting bars, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A large-size CNC longitudinal cutting bar clamping structure includes a cylinder, a piston rod fixedly connected to the output end of the cylinder, a fork hinged to the outer surface of the piston rod, a pawl hinged to the outer surface of the fork, an opening and closing sliding sleeve hinged to one side of the outer surface of the pawl, a push rod slidably connected inside the opening and closing sliding sleeve, a chuck fixedly connected to one end of the push rod, a bar inserted inside the chuck, a tapered sleeve fitted on the outer surface of the chuck, and a spring fitted in the middle of the outer surface of the push rod.

[0007] To facilitate the support of the cylinder, as a large-size CNC longitudinal cutting bar clamping structure of this utility model, a bracket is fixedly connected to one side of the outer surface of the cylinder, and the bracket is fixedly connected to the CNC lathe bed by bolts.

[0008] In order to improve transmission efficiency, as a large-size CNC longitudinal cutting bar clamping structure of this utility model, the shift fork includes a long arm and a short arm, the piston rod is hinged to the long arm of the shift fork, and the opening and closing sliding sleeve is hinged to the short arm of the shift fork.

[0009] To prevent displacement, in this utility model of a large-size CNC longitudinal cutting bar clamping structure, one end of the push rod passes through the opening and closing sliding sleeve and is fixedly connected to the chuck.

[0010] To ensure clamping stability, the large-size CNC longitudinal cutting bar clamping structure of this utility model has a clearance fit between the tapered sleeve and the chuck, and the outer surface of the chuck is provided with a tapered surface for engaging with the tapered sleeve.

[0011] In order to achieve a tight clamping effect on the bar stock, the inner hole shape of the chuck matches the outer surface shape of the bar stock in this utility model's large-size CNC longitudinal cutting bar stock clamping structure.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, through the arrangement of a cylinder, push rod, chuck, and tapered sleeve, the cylinder provides power to the entire clamping structure through the extension and retraction of the piston rod, enabling the clamping action to be executed quickly and accurately, ensuring the efficiency and stability of the clamping process. The movement of the opening and closing sliding sleeve can directly drive the movement of the push rod and chuck, realizing the clamping and releasing of the bar stock by the chuck. The tapered sleeve and spring further ensure the stability and reliability of the clamping, ensuring that the chuck can firmly clamp the bar stock during processing. Through the optimized design of the two-stage lever ratio and the reasonable selection of the cylinder, the problem of unreliability and instability of large-size CNC longitudinal cutting bar stock clamping is effectively solved, thereby improving the performance of the entire clamping structure.

[0013] 2. In this utility model, the extension and retraction movement of the piston rod of the cylinder can be effectively transmitted to the opening and closing sliding sleeve through the shift fork, thereby realizing the opening and closing action of the chuck, improving the transmission efficiency, ensuring the accuracy of the clamping action, and enabling the tapered sleeve to slide on the outer surface of the chuck, thereby realizing the clamping and releasing action of the chuck, while ensuring the stability and reliability of the clamping, ensuring the flexibility of the clamping process, and matching the inner hole shape of the chuck with the outer surface shape of the bar stock, so that the chuck can tightly clamp the bar stock, ensuring that the bar stock will not loosen or shift during the processing, which not only improves the reliability of the clamping, but also ensures the processing accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the clamping structure according to an embodiment of the present utility model.

[0015] In the diagram: 1. Cylinder; 2. Piston rod; 3. Shift fork; 4. Shift pawl; 5. Opening and closing sliding sleeve; 6. Push rod; 7. Chuck; 8. Bar stock; 9. Tapered sleeve; 10. Spring; 11. Support. Detailed Implementation

[0016] 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.

[0017] Example like Figure 1 As shown, a large-size CNC longitudinal cutting bar clamping structure includes a cylinder 1. A piston rod 2 is fixedly connected to the output end of the cylinder 1. A fork 3 is hinged to the outer surface of the piston rod 2. A pawl 4 is hinged to the outer surface of the fork 3. An opening and closing sliding sleeve 5 is hinged to one side of the outer surface of the pawl 4. A push rod 6 is slidably connected inside the opening and closing sliding sleeve 5. A chuck 7 is fixedly connected to one end of the push rod 6. A bar 8 is inserted into the inside of the chuck 7. A tapered sleeve 9 is sleeved on the outer surface of the chuck 7. A spring 10 is sleeved in the middle of the outer surface of the push rod 6.

[0018] In practical use, the clamping structure utilizes a combination of cylinder 1, shift fork 3, shift claw 4, push rod 6, chuck 7, and cone sleeve 9. Cylinder 1 acts as the power source, providing power to the entire clamping structure through the extension and retraction of piston rod 2. This ensures rapid and accurate clamping, guaranteeing high efficiency and stability. The long and short arms of shift fork 3 are connected to piston rod 2 and opening / closing sleeve 5, respectively, allowing the extension and retraction of piston rod 2 in cylinder 1 to be effectively transmitted to opening / closing sleeve 5 via shift fork 3. Shift claw 4 further enhances the flexibility of the opening / closing sleeve 5's movement. The piston rod 2 can achieve precise opening and closing actions according to its extension and retraction direction. The movement of the opening and closing sleeve 5 can directly drive the movement of the push rod 6 and the chuck 7, realizing the clamping and releasing of the bar stock 8 by the chuck 7. The tapered sleeve 9 and the spring 10 further ensure the stability and reliability of the clamping, ensuring that the chuck 7 can firmly clamp the bar stock 8 during the processing. This structure, through the optimized design of the two-stage lever ratio and the reasonable selection of the cylinder 1, effectively solves the problem of unreliability and instability of the clamping structure for large-size CNC longitudinal cutting materials, thereby improving the performance of the entire clamping structure.

[0019] In this embodiment, a bracket 11 is fixedly connected to one side of the outer surface of the cylinder 1, and the bracket 11 is fixedly connected to the CNC lathe bed by bolts.

[0020] In practical use, the bracket 11 supports the cylinder 1 and connects it to the CNC lathe to ensure that there will be no loosening or displacement during the processing, thus ensuring the reliability of the entire processing system.

[0021] In this embodiment, the shift fork 3 includes a long arm and a short arm, the piston rod 2 is hinged to the long arm of the shift fork 3, and the opening and closing sliding sleeve 5 is hinged to the short arm of the shift fork 3.

[0022] In practical use, the extension and retraction of the piston rod 2 of cylinder 1 can be effectively transmitted to the opening and closing sleeve 5 through the shift fork 3, thereby realizing the opening and closing action of the chuck 7, improving transmission efficiency and ensuring the accuracy of the clamping action.

[0023] In this embodiment, one end of the push rod 6 passes through the opening and closing sliding sleeve 5 and is fixedly connected to the clamp 7.

[0024] In practical use, the opening and closing sleeve 5 can guide and limit the movement of the push rod 6, avoiding deviation during use. This not only improves the reliability of clamping but also ensures the stability of the clamping process.

[0025] In this embodiment, the tapered sleeve 9 and the chuck 7 are in clearance fit, and the outer surface of the chuck 7 is provided with a tapered surface for engaging with the tapered sleeve 9.

[0026] In practical use, the conical sleeve 9 can slide on the outer surface of the chuck 7, thereby realizing the clamping and releasing action of the chuck 7, while ensuring the stability and reliability of the clamping and ensuring the flexibility of the clamping process.

[0027] In this embodiment, the inner hole shape of the chuck 7 matches the outer surface shape of the bar stock 8.

[0028] In practical use, the inner hole shape of the chuck 7 matches the outer surface shape of the bar stock 8, so that the chuck 7 can tightly clamp the bar stock 8, ensuring that the bar stock 8 will not loosen or shift during the processing, which not only improves the reliability of clamping, but also ensures the processing accuracy.

[0029] Working principle: During use, when cylinder 1 drives piston rod 2 to extend and retract, the power is transmitted to opening and closing sleeve 5 through the linkage of the long and short arms of shift fork 3. The design of shift claw 4 makes the movement of opening and closing sleeve 5 more flexible, and can achieve precise opening and closing action according to the extension and retraction direction of piston rod 2. The movement of opening and closing sleeve 5 directly drives the movement of push rod 6 and chuck 7, realizing the clamping and releasing of bar stock 8 by chuck 7. The chuck cone sleeve 9 and chuck 7 are clearance fit, further realizing the clamping and releasing action of chuck 7. Spring 10 enhances the stability of clamping, ensuring that chuck 7 can firmly clamp bar stock 8 during processing.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A large-size numerical control longitudinal cutting bar clamping structure comprising a gas cylinder (1), characterized in that: The output end of the cylinder (1) is fixedly connected to a piston rod (2). A fork (3) is hinged to the outer surface of the piston rod (2). A pawl (4) is hinged to the outer surface of the fork (3). An opening and closing sleeve (5) is hinged to one side of the outer surface of the pawl (4). A push rod (6) is slidably connected inside the opening and closing sleeve (5). A chuck (7) is fixedly connected to one end of the push rod (6). A bar stock (8) is inserted inside the chuck (7). A cone sleeve (9) is fitted on the outer surface of the chuck (7). A spring (10) is fitted in the middle of the outer surface of the push rod (6).

2. The large-size numerically controlled longitudinal-cut bar clamping structure according to claim 1, characterized in that: A bracket (11) is fixedly connected to one side of the outer surface of the cylinder (1), and the bracket (11) is fixedly connected to the CNC lathe bed by bolts.

3. The large-size numerically controlled longitudinal-cut bar clamping structure according to claim 1, characterized in that: The shift fork (3) includes a long arm and a short arm. The piston rod (2) is hinged to the long arm of the shift fork (3), and the opening and closing sleeve (5) is hinged to the short arm of the shift fork (3).

4. The large-size numerically controlled longitudinal-cut bar clamping structure according to claim 1, characterized in that: One end of the push rod (6) passes through the opening and closing slide sleeve (5) and is fixedly connected to the clamp (7).

5. The large-size numerically controlled longitudinal-cut bar clamping structure according to claim 1, characterized in that: The tapered sleeve (9) and the chuck (7) are in clearance fit, and the outer surface of the chuck (7) is provided with a tapered surface for fitting with the tapered sleeve (9).

6. The large-size numerically controlled longitudinal-cut bar clamping structure according to claim 1, characterized in that: The inner hole shape of the chuck (7) matches the outer surface shape of the bar stock (8).

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