Intelligent straightening three-jaw chuck

Abstract

This invention discloses an intelligent straightening three-jaw chuck, which relates to the field of machining technology. It includes a chuck and an axis deviation detection mechanism. A control mechanism is provided on the outer side of the chuck, and an axis correction mechanism is provided above the chuck. The axis deviation detection mechanism includes a rotating disk and a vertical rod. The rotating disk is movably connected to a connector and a fixing bolt via a slot and a threaded hole. The connector is movably mounted with a mounting bracket via a limiting slot and a limiting member. The advantages of this invention are: through the axis deviation detection mechanism, a laser rangefinder is responsible for measuring the distance from the workpiece axis to the laser rangefinder. An encoder is connected to the rotation mechanism of the three-jaw chuck via the rotating disk, records the circumferential angle of the chuck, and transmits the data to the controller to calculate the deviation of the workpiece axis and output an adjustment signal. The height and angle of the laser rangefinder can be adjusted to easily adapt to workpieces of different sizes.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to an intelligent straightening three-jaw chuck. Background Technology

[0002] In machining processes, the three-jaw chuck is one of the commonly used fixtures. The three-jaw chuck consists of a chuck body, movable jaws, and a jaw drive mechanism. On the underside of the guide parts of the three jaws on the three-jaw chuck, there are threads that mesh with the flat threads on the back of the disc bevel gear. When the small bevel gear is rotated through the square hole with a wrench, the disc gear rotates, and the flat threads on the back simultaneously drive the three jaws to move closer to or out of the center to clamp workpieces of different diameters. Due to factors such as vibration and thermal deformation during machining, the axis of the workpiece clamped by the three-jaw chuck is prone to deviation, which affects the machining accuracy.

[0003] The applicant discovered through a search that a Chinese patent discloses "A Three-Jaw Chuck" with publication (announcement) number "CN220806447U". This patent mainly uses a conical arc surface for the contact between the jaws on the jaw assembly of the three-jaw chuck and the frustum-shaped workpiece. Compared with the prior art, this increases the contact area between the jaws or jaw assembly and the workpiece, resulting in better clamping effect. However, most existing calibration methods rely on the operator's experience and manual adjustment, which is inefficient and lacks precision. Therefore, we propose an intelligent straightening three-jaw chuck. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent straightening three-jaw chuck.

[0005] To address the problems mentioned in the background art, the present invention provides the following technical solution: an intelligent straightening three-jaw chuck, comprising a chuck and an axis deviation detection mechanism. A control mechanism is provided on the outer side of the chuck, and an axis correction mechanism is provided above the chuck. The axis deviation detection mechanism includes a rotating disk and a vertical rod. The rotating disk is movably connected to a connector and a fixing bolt via a slot and a threaded hole. A mounting bracket is movably mounted on the connector via a limiting slot and a limiting member. An encoder is fixedly mounted inside the mounting bracket. A rotating gear is movably connected to the vertical rod via a retaining ring. A rotating frame and a laser ranging sensor are movably connected to the retaining ring via a threaded groove. The control mechanism includes a mounting sleeve. A driver is fixedly mounted on the mounting sleeve via a mounting base. A multi-port controller is fixedly mounted inside the driver. The axis correction mechanism includes three sets of jaws. Two sets of piezoelectric ceramics are fixedly mounted inside each of the three sets of jaws. Strain gauges are fixedly mounted on the sides of each of the three sets of jaws.

[0006] As a further embodiment of the present invention: the upper surface of the chuck is provided with three sets of sliding grooves, an installation collar is fixedly installed on the outer wall of the chuck, and a hollow sliding ring is fixedly installed on the bottom of the chuck.

[0007] As a further embodiment of the present invention: the rotating disk is fixedly installed at the bottom of the chuck, the hollow slip ring is located on the inner side of the rotating disk, the insertion groove is opened on the outer wall of the rotating disk, the threaded hole is opened at the middle position of the insertion groove, the insertion piece is inserted into the inside of the insertion groove, and the fixing bolt is threadedly connected to the inside of the threaded hole.

[0008] As a further embodiment of the present invention: the limiting groove is formed on the front side of the connector, and limiting holes are formed at both the upper and lower ends of the limiting groove. The limiting member is inserted into the inside of the limiting groove. The mounting bracket is fixedly installed on the front side of the limiting member. The upper and lower ends of the limiting member are provided with telescopic grooves. An elastic telescopic member is fixedly installed inside the telescopic groove. The size of the elastic telescopic member is adapted to the limiting hole.

[0009] As a further embodiment of the present invention: the bottom of the upright is fixedly installed at the center of the upper surface of the mounting base, the retaining ring is slidably connected to the outer wall of the upright, the threaded groove is provided on the outer wall of the retaining ring near the upper end, the rotating frame is rotatably connected to the outer wall of the threaded groove, the laser rangefinder is fixedly installed on the front of the rotating frame, a rotating gear is meshed on the outer wall of the retaining ring, a motor is provided on the back of the rotating gear, and the back of the motor is fixedly installed on the side of the mounting base.

[0010] As a further embodiment of the present invention: the mounting sleeve is rotatably connected to the outer wall of the mounting collar, the mounting base is fixedly mounted on the outer wall of the mounting sleeve, and the driver is fixedly mounted on the front side of the mounting base.

[0011] As a further embodiment of the present invention: a mounting back plate is fixedly mounted on the right side of the mounting base.

[0012] As a further embodiment of the present invention: the three sets of jaws are slidably connected inside the slide groove, and the bottom of each of the three sets of jaws is provided with a toothed groove, which is connected to the rotating component inside the chuck.

[0013] As a further embodiment of the present invention: each of the three sets of claws has a wire outlet hole inside, the connecting wire of the piezoelectric ceramic and the strain gauge passes through the wire outlet hole, and the connecting wire of the piezoelectric ceramic and the strain gauge is fixedly installed on the hollow slip ring.

[0014] Compared with the prior art, the beneficial effects of the present invention by adopting the above technical solution are as follows:

[0015] 1. The present invention uses an axis deviation detection mechanism. The laser rangefinder is responsible for measuring the distance from the workpiece axis to the laser rangefinder. The encoder is connected to the rotation mechanism of the three-jaw chuck through a rotating disk, records the circumferential angle of the chuck, and transmits the data to the controller to calculate the deviation of the workpiece axis and output an adjustment signal. The height and angle of the laser rangefinder can be adjusted to easily adapt to workpieces of different sizes.

[0016] 2. The present invention features a control mechanism in which a multi-port controller is embedded inside the driver, becoming part of the driver. The control system receives data from the laser rangefinder and encoder, calculates the axis deviation, and makes adjustments. The entire control mechanism is connected to the lathe via a mounting backplate, ensuring that the control mechanism remains stationary while the chuck rotates, thus avoiding any impact on the detection data. Simultaneously, the mounting bracket is rotatably connected to the outer wall of the mounting ring, keeping the distance between the driver and the chuck constant. This avoids problems such as inaccurate detection data due to excessive distance between the driver and the chuck during manual installation, unsatisfactory detection results due to excessive distance, and damage to the controller caused by workpiece debris during the detection process.

[0017] 3. The present invention uses an axis correction mechanism to control the displacement of piezoelectric ceramics through a driver, thereby finely adjusting the position of the workpiece to correct axis deviation. During the adjustment process, strain gauges monitor the clamping force of the chuck on the workpiece in real time. When the clamping force is too large or too small, the control system will receive a signal and automatically adjust according to the preset safety range to ensure the safety and stability of the processing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure in an embodiment of the present invention;

[0019] Figure 2 This is an exploded view of some structures in an embodiment of the present invention;

[0020] Figure 3 This is a partial structural schematic diagram of the axis deviation detection mechanism in an embodiment of the present invention;

[0021] Figure 4 This is one of the exploded views of the axis deviation detection mechanism in an embodiment of the present invention;

[0022] Figure 5 This is the second exploded view of the axis deviation detection mechanism in an embodiment of the present invention;

[0023] Figure 6 This is the third exploded view of the axis deviation detection mechanism in this embodiment of the invention;

[0024] Figure 7This is a three-dimensional structural diagram of the control mechanism in an embodiment of the present invention;

[0025] Figure 8 This is a left view of a portion of the structure of the axis correction mechanism in an embodiment of the present invention;

[0026] Figure 9 This is a right view of a portion of the structure of the axis correction mechanism in an embodiment of the present invention.

[0027] In the diagram: 1. Chuck; 2. Slide groove; 3. Mounting collar; 4. Hollow slip ring; 5. Axis deviation detection mechanism; 501. Rotating disk; 502. Insertion groove; 503. Threaded hole; 504. Insertion piece; 505. Fixing bolt; 506. Limiting groove; 507. Limiting hole; 508. Mounting bracket; 509. Encoder; 510. Limiting component; 511. Telescopic groove; 512. Elastic telescopic component; 513. Vertical... 514. Rod; 515. Snap ring; 516. Motor; 517. Rotating gear; 518. Threaded groove; 519. Rotating frame; 510. Laser rangefinder; 6. Control mechanism; 61. Mounting bracket; 62. Mounting base; 63. Driver; 64. Multi-port controller; 65. Mounting backplate; 7. Axis correction mechanism; 71. Claw; 72. Outlet hole; 73. Gear; 74. Strain gauge; 75. Piezoelectric ceramic. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0029] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Please see the appendix Figure 1 -Appendix Figure 9This invention relates to an intelligent straightening three-jaw chuck, comprising a chuck 1 and an axis deviation detection mechanism 5. A control mechanism 6 is located on the outer side of the chuck 1, and an axis correction mechanism 7 is located above the chuck 1. The axis deviation detection mechanism 5 includes a rotating disk 501 and a vertical rod 513. The rotating disk 501 is movably connected to a connector 504 and a fixing bolt 505 via a connector groove 502 and a threaded hole 503. A mounting bracket 508 is movably mounted on the connector 504 via a limiting groove 506 and a limiting member 510. An encoder 509 is fixedly mounted inside the mounting bracket 508. The rod 513 is movably connected to the rotating gear 516 via the retaining ring 514. The retaining ring 514 is movably connected to the rotating frame 518 and the laser rangefinder 519 via the threaded groove 517. The control mechanism 6 includes a mounting bracket 61. The mounting bracket 61 is fixedly mounted with the driver 63 via the mounting base 62. The driver 63 has a multi-port controller 64 fixedly mounted inside. The axis correction mechanism 7 includes three sets of jaws 71. Two sets of piezoelectric ceramics 75 are fixedly mounted inside each of the three sets of jaws 71. Strain gauges 74 are fixedly mounted on the sides of each of the three sets of jaws 71.

[0031] In one embodiment of the present invention: three sets of sliding grooves 2 are provided on the upper surface of the chuck 1, an installation collar 3 is fixedly installed on the outer wall of the chuck 1, and a hollow sliding ring 4 is fixedly installed on the bottom of the chuck 1.

[0032] In one embodiment of the present invention: the rotating disk 501 is fixedly installed at the bottom of the chuck 1, the hollow slip ring 4 is located inside the rotating disk 501, the insertion groove 502 is opened on the outer wall of the rotating disk 501, the threaded hole 503 is opened at the middle position of the insertion groove 502, the insertion piece 504 is inserted into the inside of the insertion groove 502, and the fixing bolt 505 is threadedly connected to the inside of the threaded hole 503.

[0033] In one embodiment of the present invention: a limiting groove 506 is formed on the front side of the plug-in 504, and limiting holes 507 are formed at both the upper and lower ends of the limiting groove 506. A limiting member 510 is inserted into the inside of the limiting groove 506. A mounting bracket 508 is fixedly installed on the front side of the limiting member 510. A telescopic groove 511 is formed at both the upper and lower ends of the limiting member 510. An elastic telescopic member 512 is fixedly installed inside the telescopic groove 511. The size of the elastic telescopic member 512 is adapted to the limiting hole 507.

[0034] In one embodiment of the present invention: the bottom of the upright 513 is fixedly installed at the center of the upper surface of the mounting base 62, the retaining ring 514 is slidably connected to the outer wall of the upright 513, the threaded groove 517 is provided on the outer wall of the retaining ring 514 near the upper end, the rotating frame 518 is rotatably connected to the outer wall of the threaded groove 517, the laser range sensor 519 is fixedly installed on the front of the rotating frame 518, the outer wall of the retaining ring 514 is meshed with a rotating gear 516, the back of the rotating gear 516 is provided with a motor 515, and the back of the motor 515 is fixedly installed on the side of the mounting base 62.

[0035] In one embodiment of the present invention: the mounting bracket 61 is rotatably connected to the outer wall of the mounting collar 3, the mounting seat 62 is fixedly mounted on the outer wall of the mounting bracket 61, and the driver 63 is fixedly mounted on the front side of the mounting seat 62.

[0036] In one embodiment of the present invention, a mounting back plate 65 is fixedly mounted on the right side of the mounting base 62.

[0037] In one embodiment of the present invention: three sets of jaws 71 are slidably connected inside the slide groove 2, and the bottom of each of the three sets of jaws 71 is provided with a toothed groove 73, which is connected to the rotating component inside the chuck 1.

[0038] In one embodiment of the present invention: each of the three sets of claws 71 has a wire outlet hole 72 inside, the connecting wires of the piezoelectric ceramic 75 and the strain gauge 74 are passed through the wire outlet hole 72, and the connecting wires of the piezoelectric ceramic 75 and the strain gauge 74 are fixedly installed on the hollow slip ring 4.

[0039] Example 1, please refer to the appendix. Figure 1 -Appendix Figure 2 The hollow slip ring 4 provides stable power and data transmission for the driver 63, ensuring signal continuity during rotation and avoiding the entanglement problem of the connecting wires of the piezoelectric ceramic 75 and strain gauge 74 when the chuck 1 rotates. The hollow slip ring 4 allows the connecting wires to pass freely when the chuck 1 rotates, avoiding wire entanglement or damage.

[0040] Example 2, please refer to the appendix. Figure 1 -Appendix Figure 6 The encoder 509 is fixedly mounted on the mounting bracket 508. The encoder 509 can be quickly installed and removed on the chuck 1 by inserting and removing the limiting member 510 in the limiting groove 506, which facilitates the maintenance of the encoder 509.

[0041] Example 3, please refer to the appendix. Figure 1 -Appendix Figure 7The control mechanism 6 is connected to the lathe via the mounting back plate 65, which causes the mounting bracket 61 to rotate along the mounting ring 3 of the chuck 1, thereby preventing the driver 63, the multi-port controller 64 and the laser rangefinder 519 from rotating and thus not affecting the detection data.

[0042] Example 4, please refer to the appendix. Figure 1 -Appendix Figure 9 By applying a suitable voltage signal to the piezoelectric ceramic 75, it can be deformed, thereby achieving a small displacement. Utilizing this characteristic, the movement of the piezoelectric ceramic 75 within a certain range can be precisely controlled, thereby indirectly achieving fine-tuning control of the position of the chuck 71.

[0043] Specifically, the laser rangefinder 519 is responsible for measuring the distance from the workpiece axis to the laser rangefinder 519. The encoder 509 is connected to the rotation mechanism of the chuck 1 through the rotating disk 501, records the circumferential angle of the chuck 1, and transmits the data to the controller to calculate the deviation of the workpiece axis and output an adjustment signal. The height and angle of the laser rangefinder 519 can be adjusted to easily adapt to workpieces of different sizes.

[0044] Specifically, the multi-port controller 64 is embedded inside the driver 63, becoming part of the driver 63. The control system receives data from the laser rangefinder 519 and the encoder 509, calculates the axis deviation, and makes adjustments. The entire control mechanism 6 is connected to the lathe via the mounting backplate 65, so that the control mechanism 6 remains stationary when the chuck 1 rotates, avoiding any impact on the detection data. At the same time, it is rotatably connected to the outer wall of the mounting collar 3 via the mounting bracket 61, so that the distance between the driver 63 and the chuck 1 remains constant. This avoids problems such as inaccurate detection data due to excessive distance between the driver 63 and the chuck 1 when manually installing the detection device, unsatisfactory detection results due to excessive distance, and damage to the driver 63 caused by workpiece machining debris easily splashing onto the driver 63 during the detection process.

[0045] Specifically, the displacement of the piezoelectric ceramic 75 is controlled by the driver 63, thereby finely adjusting the position of the workpiece to correct the axial deviation. During the adjustment process, the strain gauge 74 monitors the clamping force of the chuck 71 on the workpiece in real time. When the clamping force is too large or too small, the control system will receive a signal and automatically adjust according to the preset safety range to ensure the safety and stability of the processing process.

[0046] Working principle:

[0047] First, insert the connector 504 into the connector slot 502. Then, tighten the fixing bolt 505 into the threaded hole 503. Next, press the elastic telescopic member 512 until it is fully retracted into the telescopic groove 511. Insert the limiting member 510 into the limiting groove 506 until the elastic telescopic member 512 pops out from the limiting hole 507, thus completing the connection between the encoder 509 and the rotating disk 501. Then, the motor 515 drives the rotating gear 516 to rotate, causing the retaining ring 514 to rise and fall along the upright 513. The rotation of the rotating frame 518 on the threaded groove 517 adjusts the angle of the laser range sensor 519, thereby aligning the laser range sensor 519 with the axis of the workpiece to be inspected. The laser range sensor 519 is responsible for measuring the distance from the workpiece axis to the laser range sensor. The encoder 509, connected to the rotating mechanism of the chuck 1 via the rotating disk 501, records the circumferential angle of the chuck 1 and transmits the data to the controller. The controller calculates the deviation of the workpiece axis, outputs an adjustment signal, and controls the displacement of the piezoelectric ceramic 75 via the driver 63, thereby finely adjusting the position of the workpiece to correct the axis deviation. During the adjustment process, the strain gauge 74 monitors the clamping force of the jaw 71 on the workpiece in real time. When the clamping force is too large or too small, the control system receives a signal and automatically adjusts according to the preset safety range to ensure the safety and stability of the processing. The entire control mechanism 6 is connected to the lathe via the mounting backplate 65, so that the control mechanism 6 remains stationary when the chuck 1 rotates, avoiding any impact on the detected data. At this point, the entire workflow is complete.

[0048] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0049] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0050] It should be noted that the device structure and accompanying drawings of this invention mainly describe the principle of this invention. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above invention, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0051] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0052] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. An intelligent straightening three-jaw chuck, comprising a chuck (1) and an axis deviation detection mechanism (5), characterized in that: A control mechanism (6) is provided on the outside of the chuck (1), and an axis correction mechanism (7) is provided above the chuck (1); The axis deviation detection mechanism (5) includes a rotating disk (501) and a vertical rod (513). The rotating disk (501) is movably connected to a connector (504) and a fixing bolt (505) through a slot (502) and a threaded hole (503). The connector (504) is movably mounted with a mounting bracket (508) through a limiting slot (506) and a limiting member (510). An encoder (509) is fixedly installed inside the mounting bracket (508). The vertical rod (513) is movably connected to a rotating gear (516) through a retaining ring (514). The retaining ring (514) is movably connected to a rotating frame (518) and a laser rangefinder (519) through a threaded groove (517). The control mechanism (6) includes a mounting bracket (61), on which a driver (63) is fixedly mounted via a mounting base (62), and a multi-port controller (64) is fixedly mounted inside the driver (63); The axis correction mechanism (7) includes three sets of claws (71), each of which has two sets of piezoelectric ceramics (75) fixedly installed inside, and each of the three sets of claws (71) has a strain gauge (74) fixedly installed on its side. The upper surface of the chuck (1) is provided with three sets of sliding grooves (2), an installation collar (3) is fixedly installed on the outer wall of the chuck (1), and a hollow sliding ring (4) is fixedly installed at the bottom of the chuck (1). The rotating disk (501) is fixedly installed at the bottom of the chuck (1), the hollow slip ring (4) is located on the inner side of the rotating disk (501), the insertion groove (502) is opened on the outer wall of the rotating disk (501), the threaded hole (503) is opened at the middle position of the insertion groove (502), the insertion piece (504) is inserted into the inside of the insertion groove (502), and the fixing bolt (505) is threaded into the inside of the threaded hole (503). The limiting groove (506) is opened on the front of the connector (504). The limiting groove (506) has limiting holes (507) at both the upper and lower ends. The limiting member (510) is inserted into the limiting groove (506). The mounting bracket (508) is fixedly installed on the front of the limiting member (510). The limiting member (510) has telescopic grooves (511) at both the upper and lower ends. An elastic telescopic member (512) is fixedly installed inside the telescopic groove (511). The size of the elastic telescopic member (512) is adapted to the limiting hole (507).

2. The intelligent straightening three-jaw chuck according to claim 1, characterized in that: The bottom of the upright (513) is fixedly installed at the center of the upper surface of the mounting base (62). The retaining ring (514) is slidably connected to the outer wall of the upright (513). The threaded groove (517) is located on the outer wall of the retaining ring (514) near the upper end. The rotating frame (518) is rotatably connected to the outer wall of the threaded groove (517). The laser range sensor (519) is fixedly installed on the front of the rotating frame (518). A rotating gear (516) is meshed on the outer wall of the retaining ring (514). A motor (515) is provided on the back of the rotating gear (516). The back of the motor (515) is fixedly installed on the side of the mounting base (62).

3. The intelligent straightening three-jaw chuck according to claim 2, characterized in that: The mounting bracket (61) is rotatably connected to the outer wall of the mounting collar (3), the mounting seat (62) is fixedly mounted on the outer wall of the mounting bracket (61), and the driver (63) is fixedly mounted on the front of the mounting seat (62).

4. The intelligent straightening three-jaw chuck according to claim 3, characterized in that: A mounting backplate (65) is fixedly installed on the right side of the mounting base (62).

5. The intelligent straightening three-jaw chuck according to claim 4, characterized in that: The three sets of jaws (71) are slidably connected inside the slide groove (2). The bottom of each of the three sets of jaws (71) is provided with a toothed groove (73), which is connected to the rotating component inside the chuck (1).

6. The intelligent straightening three-jaw chuck according to claim 5, characterized in that: The three sets of claws (71) are provided with wire outlet holes (72) inside. The connecting wires of the piezoelectric ceramic (75) and the strain gauge (74) are passed through the wire outlet holes (72). The connecting wires of the piezoelectric ceramic (75) and the strain gauge (74) are fixedly installed on the hollow slip ring (4).

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