Chuck with adjustable calibration centering

Abstract

The utility model relates to chuck technical field especially is involved in a kind of adjustable calibration centering chuck, including disc body, at least three clamping blocks and several adjusting mechanisms, clamping block is arranged in disc body top surface, adjusting mechanism and clamping block one to one correspondence, adjusting mechanism is arranged on its corresponding clamping block, adjusting mechanism includes clamping plate and adjusting piece, clamping plate is arranged on clamping block close to disc body in one end, adjusting piece and clamping block are threadedly connected, one end of adjusting piece and clamping plate are rotatably connected, adjusting piece can provide power for clamping plate away from or close to disc body center, each clamping plate is driven to move radially by adjusting mechanism respectively, the independent fine adjustment for each clamping point is realized, the cumulative assembly tolerance of disc body, clamping block and other basic components can be directly compensated, and the centering accuracy and calibration efficiency for asymmetric, eccentric or irregular workpieces are significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of chuck technology, and in particular to an adjustable calibration and centering chuck. Background Technology

[0002] In the fields of machining, inspection, and assembly, chucks are key devices used to clamp workpieces or tools. Although traditional three-jaw chucks and other general-purpose chucks are widely used, they typically employ integral thread drive (such as a bevel gear synchronous structure), forcing multiple clamping jaws to move synchronously and at equal distances. This structure allows for quick centering of regular cylindrical workpieces; however, it cannot perform rapid and accurate adaptive centering and calibration when dealing with irregular, non-cylindrical workpieces or workpieces with inherent initial eccentricity, resulting in significant limitations in adjustment.

[0003] While some existing independently adjustable chucks allow individual movement of the clamping blocks, their adjustment often relies on simple threaded feed mechanisms. In practical use, manufacturing and assembly tolerances are unavoidable in each clamping block, threaded pair, and related connecting parts. These tolerances accumulate after installation, causing deviations between the actual travel of different clamping blocks and their theoretical values. Consequently, even when the operator attempts precise calibration, it is difficult for each clamping surface to simultaneously and evenly conform to the irregular workpiece surface, easily leading to unstable clamping, poor centering accuracy repeatability, and even potential damage to the surface of precision workpieces due to uneven force. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to overcome the fact that although general-purpose chucks such as three-jaw chucks are widely used in the prior art, they usually adopt integral thread drive (such as bevel gear synchronous structure), which forces multiple clamping jaws to move synchronously and at equal distances. This structure can quickly center regular cylindrical workpieces, but it cannot perform fast and accurate adaptive centering calibration when facing irregular, non-cylindrical workpieces or workpieces with initial eccentricity. The adjustment is obviously limited. Therefore, this utility model provides an adjustable calibration centering chuck.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an adjustable calibration and centering chuck, including a chuck body, at least three clamping blocks and several adjustment mechanisms. The clamping blocks are arranged on the top surface of the chuck body, and the adjustment mechanisms correspond one-to-one with the clamping blocks. The adjustment mechanism is arranged on its corresponding clamping block. The adjustment mechanism includes a clamping plate and an adjustment component. The clamping plate is arranged on one end of the clamping block near the center of the chuck body. The adjustment component is threadedly connected to the clamping block. One end of the adjustment component is rotatably connected to the clamping plate. The adjustment component can provide power for the clamping plate to move away from or closer to the center of the chuck body. The adjustment mechanism drives each clamping plate to move radially, realizing independent fine adjustment for each clamping point. It can directly compensate for the cumulative assembly tolerance of the chuck body, clamping blocks and other basic components, and significantly improve the centering accuracy and calibration efficiency for asymmetrical, eccentric or irregular workpieces.

[0006] To address the issue that during independent adjustment, the clamping plates, driven solely by threads, are prone to uneven, unstable, or jammed motion trajectories due to gaps and tolerances, leading to inconsistent movement of the clamping plates and affecting alignment accuracy, a further improvement is made: the top surface of the clamping plate is bent away from the center of the disc to form a connecting part; the bottom surface of the connecting part has a groove extending radially along the disc; the top surface of the clamping block protrudes to form a slider that matches the groove; the slider and the groove are slidably connected.

[0007] To address the issue that clamping plates are prone to lateral skewing, warping, or insufficient rigidity during adjustment or clamping when subjected to unidirectional force and with gaps / tolerances between parts, thus affecting centering repeatability and clamping stability, a further improvement is made by arranging a stabilizing rod on the side of the clamping plate away from the center of the disc, and providing a stabilizing groove on the end face of the clamping block near the clamping plate to accommodate the stabilizing rod, with the stabilizing rod slidably arranged within the stabilizing groove.

[0008] To address the issue that an unreasonable layout of the adjusting components, guide structure, and stabilizing structure may lead to uneven internal stress in the clamping plate, poor adjusting lever arm, and affect the adjusting feel, transmission efficiency, and long-term stability, the design further includes positioning the adjusting components between the stabilizing rod and the connecting part.

[0009] To address the issues of lack of intuitive physical alignment reference when multiple independent clamping plates converge toward the center, making it difficult to quickly achieve initial centering, and the poor adaptability of the clamping surface shape to complex workpiece contours, the invention further includes a clamping portion formed on the side of the clamping plate near the center of the disc, with inclined mating surfaces on both sides of the clamping portion extending radially along the disc.

[0010] To address the issues that smooth clamping surfaces can easily cause workpiece slippage and insufficient friction when there are microscopic uneven fits (caused by tolerances), thus affecting machining safety and accuracy, the clamping surface of the clamping part is further equipped with anti-slip textures.

[0011] The beneficial effects of this utility model are: the adjustable calibration and centering chuck provided by this utility model drives each clamping plate to move radially through the adjustment mechanism, realizing independent fine adjustment for each clamping point, which can directly compensate for the cumulative assembly tolerance of basic components such as the disc body and clamping blocks, and significantly improve the centering accuracy and calibration efficiency for asymmetrical, eccentric or irregular workpieces. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention.

[0014] In the figure: 1. Disc body, 2. Clamping block, 21. Slider, 22. Stabilizing groove, 3. Adjustment mechanism, 31. Clamping plate, 311. Clamping part, 312. Dating surface, 313. Anti-slip texture, 32. Adjusting component, 33. Connecting part, 331. Slide groove, 34. Stabilizing rod. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0016] like Figure 1 This is a schematic diagram of the structure of this utility model, an adjustable calibration and centering chuck, including a chuck body 1, at least three clamping blocks 2, and several adjustment mechanisms 3. The clamping blocks 2 are arranged on the top surface of the chuck body 1. The adjustment mechanisms 3 correspond one-to-one with the clamping blocks 2 and are arranged on their corresponding clamping blocks 2. The adjustment mechanism 3 includes a clamping plate 31 and an adjustment element 32. The clamping plate 31 is arranged on one end of the clamping block 2 near the center of the chuck body 1. The adjustment element 32 is threadedly connected to the clamping block 2. The adjustment element 32 can be a screw. One end of the adjustment element 32 is rotatably connected to the clamping plate 31. The adjustment element 32 can provide power for the clamping plate 31 to move away from or closer to the center of the chuck body 1. Through the adjustment mechanism 3, each clamping plate 31 is driven to move radially, realizing independent fine adjustment for each clamping point. It can directly compensate for the cumulative assembly tolerance of the chuck body 1, clamping blocks 2 and other basic components, and significantly improve the centering accuracy and calibration efficiency for asymmetrical, eccentric or irregular workpieces.

[0017] like Figure 2As shown, the top surface of the clamping plate 31 is bent away from the center of the disk body 1 to form a connecting part 33. The bottom surface of the connecting part 33 is provided with a groove 331 extending radially along the disk body 1. The top surface of the clamping block 2 protrudes to form a slider 21 that matches the groove 331. The slider 21 and the groove 331 are slidably connected. By adding a sliding pair between the groove 331 and the slider 21, the clamping plate 31 is provided with a radial linear guide independent of the adjusting member 32, which forcibly constrains the movement path of the clamping plate 31 and ensures the linearity, consistency and reliability of the adjustment action of each clamping component, providing a key motion guarantee for precise centering.

[0018] like Figure 2 As shown, a stabilizing rod 34 is arranged on the side of the clamping plate 31 away from the center of the disc 1. A stabilizing groove 22 for accommodating the stabilizing rod 34 is opened on the end face of the clamping block 2 near the clamping plate 31. The stabilizing rod 34 is slidably arranged in the stabilizing groove 22. By adding a second sliding pair formed by the stabilizing rod 34 and the stabilizing groove 22, an effective auxiliary support and constraint is formed on the clamping plate 31 from the side. It works in conjunction with the guide structure formed by the sliding groove 331 and the slider 21 to greatly enhance the clamping plate 31's resistance to lateral forces and its anti-overturning ability due to misalignment caused by tolerances, thus ensuring the overall rigidity and repeatability of the clamping system.

[0019] like Figure 2 As shown, the adjusting member 32 is located between the stabilizer bar 34 and the connecting part 33. By placing the adjusting member 32 between the stabilizer bar 34 and the connecting part 33, an optimized force flow transmission path and a compact triangular support layout are formed, so that the driving, guiding and stabilizing functions work together, the clamping plate 31 is subjected to more balanced force, the adjustment is more stable and smooth, and the structural stability is higher.

[0020] like Figure 1 , 2 As shown, a clamping part 311 is formed on the side of the holding plate 31 near the center of the disk body 1. The clamping part 311 has inclined mating surfaces 312 on both sides. The mating surfaces 312 extend radially along the disk body 1. The inclined mating surfaces on both sides of the clamping part 311 can naturally guide and eventually assemble into a visible and perceptible annular reference surface during the movement, which greatly facilitates rapid initial alignment. At the same time, the inclined surface design expands the effective contact range with the workpiece and enhances the adaptability to non-cylindrical contour workpieces.

[0021] like Figure 2 As shown, the clamping surface of the clamping part 311 has anti-slip texture 313, which increases the friction of the clamping surface. This can effectively prevent the workpiece from sliding and improve the problem of excessive local pressure caused by uneven contact, thereby improving the overall reliability and safety of clamping and the protection of the workpiece surface.

[0022] Working process: The sliding groove 331 at the bottom of the clamping plate 31 slides precisely along the slider 21 on the clamping block 2, providing primary linear guidance to ensure accurate movement trajectory and overcome the potential deviation that may occur with simple thread drive. Simultaneously, the stabilizing rod 34 on the side of the clamping plate 31 slides synchronously within the corresponding stabilizing groove 22, forming auxiliary constraints and effectively preventing any undesirable wobble of the clamping plate 31 due to part gaps or force. The operator can observe the inclined mating surfaces 312 of the clamping parts 311 on each clamping plate 31, gradually bringing them closer to the workpiece surface. Since each clamping plate 31 can be independently adjusted to the optimal position, it can effectively compensate for the system's own tolerances, allowing each mating surface 312 to uniformly conform to the workpiece and eventually come together to form a roughly closed loop, completing a high-precision initial alignment calibration. Subsequently, finer adjustments can be made to ensure optimal and uniform contact between the anti-slip texture 313 clamping surfaces of each clamping part 311 and the workpiece surface, and to apply a preset clamping force. Finally, lock the clamping block 2 or use other fastening methods to fix all positions, and you can start the machining or inspection operation. The whole process realizes adaptive compensation for part tolerance and high-precision centering.

[0023] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An adjustable calibration and centering chuck, characterized in that, The device includes a disc body (1), at least three clamping blocks (2), and several adjusting mechanisms (3). The clamping blocks (2) are arranged on the top surface of the disc body (1). The adjusting mechanisms (3) correspond one-to-one with the clamping blocks (2). The adjusting mechanism (3) is arranged on its corresponding clamping block (2). The adjusting mechanism (3) includes a clamping plate (31) and an adjusting member (32). The clamping plate (31) is arranged on one end of the clamping block (2) near the center of the disc body (1). The adjusting member (32) is threadedly connected to the clamping block (2). One end of the adjusting member (32) is rotatably connected to the clamping plate (31). The adjusting member (32) can provide power for the clamping plate (31) to move away from or closer to the center of the disc body (1).

2. The adjustable calibration centering chuck as described in claim 1, characterized in that: The top surface of the clamping plate (31) is bent away from the center of the disk body (1) to form a connecting part (33). The bottom surface of the connecting part (33) is provided with a sliding groove (331) extending radially along the disk body (1). The top surface of the clamping block (2) protrudes to form a slider (21) that matches the sliding groove (331). The slider (21) and the sliding groove (331) are slidably connected.

3. The adjustable calibration centering chuck as described in claim 2, characterized in that: A stabilizing rod (34) is arranged on the side of the clamping plate (31) away from the center of the disc (1). A stabilizing groove (22) for accommodating the stabilizing rod (34) is provided on the end face of the clamping block (2) near the clamping plate (31). The stabilizing rod (34) is slidably arranged in the stabilizing groove (22).

4. The adjustable calibration centering chuck as described in claim 3, characterized in that: The adjusting member (32) is located between the stabilizer bar (34) and the connecting part (33).

5. The adjustable calibration centering chuck as described in claim 1, characterized in that: The clamping plate (31) has a clamping part (311) formed on the side near the center of the disc (1). The clamping part (311) has inclined mating surfaces (312) on both sides, and the mating surfaces (312) extend radially along the disc (1).

6. The adjustable calibration centering chuck as described in claim 5, characterized in that: The clamping surface of the clamping part (311) has anti-slip texture (313).

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