Numerical control horizontal double-sided automatic rotary clamp

Abstract

The utility model relates to the technical field of clamp, and disclose a numerical control horizontal double -sided automatic rotary clamp, this numerical control horizontal double -sided automatic rotary clamp, including the shell body, the inside of shell body is provided with the inner rotary body of installable rhombic frustum workpiece. The numerical control horizontal double -sided automatic rotary clamp is provided with rhombic frustum workpiece axial and is placed into the rotary cylinder body inside, and through eight sets of clamping jaw bases and its V -shaped working surface of evenly distributing in the both ends of cylinder body, the workpiece taper surface is implemented adaptive positioning and clamping. Specifically, the wedge positioning surface of V -shaped clamping jaw and workpiece taper bus form four -point contact, and the workpiece gravity and clamping force are converted into radial centring component force, realize the preliminary centring restraint of workpiece axis. For further accurate adjustment workpiece both ends coaxial degree, the clamping jaw base is equipped with precision screw fine adjustment mechanism. The operator can manually rotate exposed screw square head, drive clamping jaw base slip along rotary cylinder radial, thereby adjust the closing amount and central position of V -shaped clamping jaw.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically a CNC horizontal double-sided automatic rotary fixture. Background Technology

[0002] In the fields of aerospace, heavy machinery, and special equipment manufacturing, precision machining of large and complex structural components is frequently involved. Take a large rhomboid truncated cone workpiece as an example. Although such workpieces can be machined on a five-axis CNC machine tool, the technical challenge lies in the accurate positioning and efficient conversion of various holes and tilting features during the machining process.

[0003] However, in actual use, the aforementioned equipment handles large batches of workpieces. While these machines can reliably process workpieces on a standard five-axis CNC machine tool, the challenge lies in accurately positioning the holes and tilting directions during machining. Using a fixed fixture on a five-axis CNC machine tool requires 2-3 re-clamping operations, which is extremely difficult. Therefore, we propose a CNC horizontal double-sided automatic rotary fixture. Utility Model Content

[0004] The purpose of this utility model is to provide a CNC horizontal double-sided automatic rotary fixture to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a CNC horizontal double-sided automatic rotary fixture, comprising an outer shell, an inner rotating body for mounting a rhomboid frustum workpiece disposed inside the outer shell, a fixing mechanism disposed on the surface of the outer shell, and an auxiliary mechanism disposed on the surface of the outer shell, the fixing mechanism comprising: A rotary cylinder is disposed inside an outer shell. Both ends of the rotary cylinder are fixedly mounted with gripper seats. The side walls of the gripper seats are threaded with screws, and the ends of the screws are rotatably connected to grippers.

[0006] Preferably, the number of grippers is set to several, and the several grippers are set on both ends of the rotary cylinder. The arrangement of multiple grippers facilitates stable processing of the rhomboid cone workpiece.

[0007] Preferably, the end of the gripper away from the screw is V-shaped, and the gripper is movably connected to the dovetail guide rail of the gripper seat, so that the gripper moves only in a straight line along the dovetail guide rail of the gripper seat, and the end of the gripper can better fit the surface of the rhomboid cone workpiece.

[0008] Preferably, the auxiliary mechanism includes a servo motor, which is fixedly mounted on the side wall of the outer casing. A worm gear is fixedly mounted on the output end of the servo motor. A worm wheel is fixedly connected to the arc surface of the rotary cylinder. The inner ring of a radial thrust ball bearing is fixedly connected to the cylindrical surface of the rotary cylinder. A magnetic grating reading head is fixedly mounted on the surface of the outer casing.

[0009] Preferably, there are two radial thrust ball bearings, which are disposed on the cylindrical surfaces at both ends of the rotary cylinder. The arrangement of two radial thrust ball bearings facilitates the precise rotation of the rotary cylinder.

[0010] Preferably, the worm wheel is connected to the worm gear drive, and the worm wheel is located in the middle of two radial thrust ball bearings, so that the worm wheel can stably drive the rotating cylinder for processing.

[0011] Preferably, the end of the worm gear furthest from the servo motor is connected to an inner bore bearing of the outer casing via a bearing, and the outer ring of the radial thrust ball bearing is fixedly installed in the inner bore of the outer casing.

[0012] Compared with the prior art, this utility model provides a CNC horizontal double-sided automatic rotary fixture, which has the following advantages: 1. This CNC horizontal double-sided automatic rotary fixture, equipped with a fixing mechanism, allows the workpiece, axially inserted into a rotary cylinder with a rhomboid truncated cone shape. Eight sets of gripper seats evenly distributed at both ends of the cylinder and their V-shaped working surfaces provide adaptive positioning and clamping of the workpiece's conical surface. Specifically, the wedge-shaped positioning surface of the V-shaped gripper forms four-point contact with the generatrix of the workpiece's truncated cone, converting the workpiece's gravity and clamping force into a radial centering force, achieving initial centering constraint on the workpiece's axis. To further precisely adjust the coaxiality of the workpiece's two ends, the gripper seats are equipped with a precision screw fine-tuning mechanism. The operator can manually rotate the exposed square head of the screw to drive the gripper seats to slide radially along the rotary cylinder, thereby adjusting the closure amount and center position of the V-shaped grippers.

[0013] 2. This CNC horizontal double-sided automatic rotary fixture, through the inclusion of an auxiliary mechanism, uses a servo motor to drive the rotary cylinder to rotate continuously 360 degrees via a precision worm gear pair. Both ends of the cylinder are supported by radial thrust ball bearing assemblies, providing high rigidity and axial positioning, ensuring smooth and precise rotation. Through precise angular displacement control of the servo motor by the CNC system, high-precision indexing and dynamic rotation of the workpiece at any angle can be achieved. This allows for rapid adjustment of the spatial machining orientation of the rhomboid cone workpiece, meeting the needs of multi-process composite machining and significantly improving machining efficiency and consistency of form and position accuracy. Attached Figure Description

[0014] Figure 1 This is a partial cross-sectional schematic diagram of the main structure of this utility model.

[0015] In the diagram: 1. Outer shell; 2. Rhomboid truncated cone workpiece; 3. Fixing mechanism; 301. Rotary cylinder; 302. Gripper seat; 303. Screw; 304. Gripper; 4. Auxiliary mechanism; 401. Servo motor; 402. Worm gear; 403. Worm wheel; 404. Magnetic grating reading head; 405. Radial thrust ball bearing. Detailed Implementation

[0016] like Figure 1 As shown, this utility model provides a technical solution: a CNC horizontal double-sided automatic rotary fixture, including an outer shell 1, an inner rotating body that can install a rhomboid cone workpiece 2 inside the outer shell 1, a fixing mechanism 3 on the surface of the outer shell 1, and an auxiliary mechanism 4 on the surface of the outer shell 1. The fixing mechanism 3 includes a rotary cylinder 301, a gripper seat 302, a screw 303, and a gripper 304.

[0017] In one embodiment of this utility model, a rotary cylinder 301 is disposed inside the outer shell 1. Claw seats 302 are fixedly installed at both ends of the rotary cylinder 301. A screw 303 is threadedly connected to the side wall of the claw seat 302, and a claw 304 is rotatably connected to the end of the screw 303. Several claws 304 are provided, disposed on both ends of the rotary cylinder 301. The arrangement of multiple claws 304 facilitates stable and accurate positioning of the rhomboid cone workpiece 2.

[0018] In addition, the end of the gripper 304 away from the screw 303 is V-shaped. The gripper 304 is movably connected to the dovetail guide rail of the gripper seat 302, so that the gripper 304 only moves linearly on the surface of the gripper seat 302. The end of the gripper 304 can better fit the surface of the rhomboid cone workpiece 2. The auxiliary mechanism 4 includes a servo motor 401, which is fixedly installed on the side wall of the outer shell 1. The output end of the servo motor 401 is fixedly installed with a worm gear 402. The arc surface of the rotary cylinder 301 is fixedly connected with a worm wheel 403. The cylindrical surface of the rotary cylinder 301 is fixedly connected with the inner ring of the radial thrust ball bearing 405. The surface of the outer shell 1 is fixedly installed with a magnetic grating reading head 404. The side wall of the rotary cylinder 301 is fixedly installed with a precision magnetic grating, which rotates synchronously with the cylinder to record precise angular position information. The magnetic grating reading head 404 is a signal sensor fixed on the outer shell 1. It is used for non-contact closed-loop control of the angular displacement data on the magnetic grating and to feed back the actual rotation angle of the rotary cylinder 301 to the CNC system.

[0019] In this embodiment of the invention, two radial thrust ball bearings 405 are provided, positioned on the two end cylindrical surfaces of the rotary cylinder 301. The arrangement of the two radial thrust ball bearings 405 facilitates the rotation of the rotary cylinder 301. A worm gear 403 is connected to the worm 402, and is positioned between the two radial thrust ball bearings 405, enabling the worm gear 403 to stably drive the rotary cylinder 301 for machining. The end of the worm 402 furthest from the servo motor 401 is connected to the inner wall of the outer casing 1 via a bearing, and the outer ring of the radial thrust ball bearing 405 is fixedly installed on the inner wall of the outer casing 1.

[0020] In this invention, during use, a workpiece 2 with a rhomboid frustum is axially inserted into a rotating cylinder 301. Eight sets of gripper seats 302, evenly distributed at both ends of the cylinder, and their V-shaped working surfaces adaptively position and clamp the workpiece's conical surface. Specifically, the wedge-shaped positioning surface of the V-shaped gripper 304 forms four-point contact with the generatrix of the workpiece's frustum, converting the workpiece's gravity and clamping force into a radial centering force, achieving initial centering constraint on the workpiece's axis. To further precisely adjust the coaxiality of the workpiece's ends, the gripper seat 302 is equipped with a precision screw 303 fine-tuning mechanism. The operator can manually rotate the exposed square head of the screw 303 to drive the gripper seat 302 to slide radially along the rotating cylinder, thereby adjusting the closing amount and center position of the V-shaped gripper 304.

[0021] Furthermore, the servo motor 401 drives the rotating cylinder 301 to rotate continuously 360 degrees via a precision worm gear 402-worm wheel 403 pair. Both ends of the cylinder are provided with high-rigidity support and axial positioning by a set of radial thrust ball bearings 405, ensuring smooth and precise rotation. Through precise angular displacement control of the servo motor 401 by the CNC system, high-precision indexing and dynamic rotation of the workpiece at any angle can be achieved, thereby quickly adjusting the spatial machining orientation of the rhomboid cone workpiece 2, meeting the needs of multi-process composite machining, and significantly improving machining efficiency and consistency of form and position accuracy.

[0022] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A CNC horizontal double-sided automatic rotary fixture, comprising an outer shell (1), wherein an inner rotary body is provided inside the outer shell (1) for mounting a rhomboid frustum workpiece (2), characterized in that: A fixing mechanism (3) is provided on the surface of the outer shell (1), and an auxiliary mechanism (4) is provided on the surface of the outer shell (1). The fixing mechanism (3) includes: A rotary cylinder (301) is disposed inside the outer shell (1). Both ends of the rotary cylinder (301) are fixedly installed with gripper seats (302). The side wall of the gripper seat (302) is threadedly connected with a screw (303). The end of the screw (303) is rotatably connected with a gripper (304).

2. The CNC horizontal double-sided automatic rotary fixture according to claim 1, characterized in that: The number of grippers (304) is set to several, and the several grippers (304) are set on both ends of the rotary cylinder (301).

3. A CNC horizontal double-sided automatic rotary fixture according to claim 2, characterized in that: The end of the gripper (304) away from the screw (303) is V-shaped, and the gripper (304) is movably connected to the dovetail guide rail of the gripper seat (302).

4. A CNC horizontal double-sided automatic rotary fixture according to claim 1, characterized in that: The auxiliary mechanism (4) includes a servo motor (401), which is fixedly installed on the side wall of the outer shell (1). A worm gear (402) is fixedly installed at the output end of the servo motor (401). A worm wheel (403) is fixedly connected to the arc surface of the rotary cylinder (301). The inner ring of a radial thrust ball bearing (405) is fixedly connected to the cylindrical surface of the rotary cylinder (301). A magnetic grating reading head (404) is fixedly installed on the surface of the outer shell (1).

5. A CNC horizontal double-sided automatic rotary fixture according to claim 4, characterized in that: The radial thrust ball bearing (405) is provided in two quantities, and the two radial thrust ball bearings (405) are provided on the cylindrical surfaces at both ends of the rotary cylinder (301).

6. A CNC horizontal double-sided automatic rotary fixture according to claim 5, characterized in that: The worm wheel (403) is connected to the worm (402) for transmission, and the worm wheel (403) is located in the middle of the two radial thrust ball bearings (405).

7. A CNC horizontal double-sided automatic rotary fixture according to claim 6, characterized in that: The end of the worm gear (402) away from the servo motor (401) is connected to the inner bore bearing of the outer shell (1) via a bearing, and the outer ring of the radial thrust ball bearing (405) is fixedly installed in the inner bore of the outer shell (1).

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