Rotary support for fixed-beam gantry machining center

Abstract

The utility model provides a rotary support for a fixed-beam gantry machining center. The rotary support aims at solving the problems that in the prior art, multi-angle machining difficulty is large, machining precision is low, and workpieces need to be frequently clamped again. The rotary support comprises a rotary bearing seat, a rotary table, a double-shaft machine table and a chuck. The rotary table is installed on the rotary bearing seat and can rotate, and the speed reduction steering engine drives the gear ring to be meshed to achieve rotation. The double-shaft machine table comprises a deflection table and a main rotating shaft and is driven by a first motor and a second motor respectively, multi-axial independent or linkage rotation is achieved, and a grating sensor and a grating ring are arranged so that accurate angle control can be achieved. The chuck is of a three-jaw structure, is used for stably clamping a workpiece and rotates and moves along with the deflection table. By means of the design, multi-angle and high-precision machining of workpieces can be achieved, the number of times of re-clamping of the workpieces is reduced, the machining efficiency and precision are remarkably improved, and the device is suitable for precise manufacturing of complex workpieces.

Description

Technical Field

[0001] The utility model relates to the technical field of gantry machining centers, in particular to a rotary bracket for a fixed-beam gantry machining center. Background Art

[0002] In modern manufacturing, fixed-beam gantry machining centers, as highly efficient CNC processing equipment, are widely used to manufacture a wide variety of large, complex workpieces. However, as machining requirements become increasingly complex, traditional fixed-beam gantry machining centers are gradually exhibiting deficiencies when handling multi-angle, multi-directional precision machining. These deficiencies are primarily manifested in the following ways: Due to structural limitations, workpieces require frequent re-clamping and repositioning, resulting in reduced machining efficiency. Furthermore, each repositioning introduces errors, compromising machining accuracy.

[0003] Especially in fields such as aerospace, automotive molds, and precision machinery, many parts have complex geometries and require high machining precision, which poses a greater challenge to fixed-beam gantry machining centers. Existing machining centers typically rely on multiple workpiece clamping to achieve multi-directional machining. This not only increases the difficulty and time cost of workpiece positioning, but also easily causes cumulative errors due to multiple clamping, making it difficult to meet the high-precision, multi-angle machining requirements.

[0004] To address these issues, the industry has proposed several solutions, such as using multi-axis linkage technology to increase machining flexibility or introducing rotary tables in machining centers to reduce workpiece repositioning. However, traditional rotary tables typically only offer single-angle rotation adjustment, failing to meet multi-directional and multi-angle machining requirements. Furthermore, these rotary tables are complex, expensive to manufacture, and difficult to maintain.

[0005] Therefore, integrating an efficient, precise, and compact slewing bracket into a fixed-beam gantry machining center to achieve multi-angle and multi-directional machining capabilities has become a pressing technical challenge. This utility model addresses this technical challenge by providing a structurally optimized slewing bracket that, through dual-axis rotation and precise angular feedback control, enables multi-angle rotational machining of workpieces, significantly improving machining efficiency and accuracy, making it suitable for high-precision manufacturing of complex workpieces. Utility Model Content

[0006] The utility model aims to solve the technical problems existing in the prior art or related technologies.

[0007] To this end, the purpose of the present invention is to provide a rotary bracket for a fixed-beam gantry machining center, which, through a dual-axis rotation structure and precise angle feedback control, can realize multi-angle and multi-directional rotation processing of workpieces, thereby improving processing efficiency and accuracy and reducing the number of times the workpiece is re-clamped.

[0008] To achieve the above-mentioned purpose, the present invention provides a swivel bracket comprising:

[0009] Rotary bearing: As a supporting structure, the rotary bearing is fixedly installed on the working platform of the fixed beam gantry machining center to support the weight and bearing capacity of the entire rotary bracket;

[0010] A turntable is rotatably mounted on the surface of the turntable, the dual-axis machine platform is fixed to the surface of the turntable, a bearing frame is fixedly mounted on the surface of the turntable, a reduction steering gear is fixedly mounted on the bottom surface of the turntable, a gear ring is provided on the inner side of the turntable, and a transmission gear ring is provided on the outer periphery of the reduction steering gear that is in transmission engagement with the inner side of the gear ring. Driven by the reduction steering gear, the turntable rotates on the inner side of the turntable, thereby driving the dual-axis machine platform to rotate;

[0011] The reduction steering gear is an outer rotor motor, and the output end of the reduction steering gear is engaged with the inner side of the gear ring through the outer gear ring to realize the rotational drive of the turntable.

[0012] Turntable: The turntable is mounted on the upper part of the turntable and can rotate inside the turntable. The turntable is driven by the reduction servo at the bottom, and the outer rotor motor drives the gear ring to engage and rotate.

[0013] Dual-axis machine: The dual-axis machine consists of a deflection table and a main shaft, mounted on the turntable. The deflection table is driven by a first motor to rotate a synchronous shaft, adjusting the deflection angle; the main shaft is driven by a second motor to rotate the workpiece perpendicular to the deflection table. The dual-axis machine design allows the workpiece to rotate independently or in conjunction with two different axes, meeting multi-angle processing requirements.

[0014] The dual-axis machine includes a deflection table, a main rotating shaft, and a first motor and a second motor fixed to the two ends of a bearing frame; a synchronous shaft is rotatably mounted on the surface of the bearing frame, the deflection table is rotatably sleeved on the inner side of the bearing frame, and transmission rings are fixedly sleeved on both ends of the deflection table, and the transmission rings are connected to the surface of the synchronous shaft via a belt drive; the output end of the first motor is in transmission connection with the surface of the synchronous shaft, the main rotating shaft is rotatably mounted on the surface of the deflection table perpendicular to the direction of rotation, and the second motor is used to drive the main rotating shaft to rotate;

[0015] The synchronization shaft is arranged in parallel with the deflection table, and one end of the synchronization shaft is connected to the output end of the first motor through a pulley set. The transmission ring is coaxially arranged with the deflection table to realize rotation control of the deflection table.

[0016] The first motor, the second motor and the deflection table are located on the same horizontal line. A pulley set or a gear set for connecting the output end of the second motor to the main shaft is provided on the inner side of the deflection table.

[0017] Grating sensor and grating ring: used to detect the rotation angle of the main shaft in real time, provide accurate angle feedback, and ensure processing accuracy;

[0018] A grating sensor is fixedly installed on the inner side of the deflection table, and a grating ring is fixedly sleeved on the surface of the main shaft. The grating ring cooperates with the grating sensor to achieve precise angle detection and feedback control of the main shaft.

[0019] Chuck: A three-jaw chuck structure is used to firmly clamp the workpiece. The bottom surface of the chuck slides against the top surface of the deflection table and can move with the rotation of the deflection table;

[0020] The chuck is a three-jaw chuck structure, and the bottom surface of the chuck is in sliding contact with the top surface of the deflection table, and is used to fix the workpiece and rotate with the deflection table.

[0021] The beneficial effects achieved by the utility model are:

[0022] 1. In the present invention, through the design of a dual-axis machine, including the arrangement of the deflection table, main rotating shaft, synchronous shaft, etc., the deflection table and the main rotating shaft can be rotated independently or in conjunction with each other in two different axial directions, providing multi-dimensional rotational processing capabilities, thereby significantly improving the multi-directional processing performance of the machining center, and is particularly suitable for the precision processing of workpieces with complex shapes.

[0023] 2. In the present invention, the grating ring and the grating sensor are combined to realize accurate angle detection and feedback control of the main shaft, which significantly improves the positioning accuracy and stability of the main shaft, thereby effectively improving the processing accuracy and meeting the needs of high-precision processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the exploded structure of a transfer bearing according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of a dual-axis machine and a chuck structure according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the exploded structure of a dual-axis machine according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the main shaft structure of an embodiment of the present utility model.

[0029] Reference numerals:

[0030] 100, swivel bearing; 110, turntable; 120, reduction servo; 111, bearing frame; 112, gear ring;

[0031] 200, dual-axis machine; 210, deflection table; 220, main rotating shaft; 230, first motor; 240, second motor; 250, grating sensor; 211, transmission ring; 221, grating ring; 231, synchronization shaft;

[0032] 300. Chuck. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other unless there is any conflict.

[0034] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0035] The utility model provides a swivel bracket for a fixed beam gantry machining center, which can meet the needs of complex and multi-angle machining, has a compact structure and is easy to operate. The specific implementation of the utility model is described in detail below with reference to the accompanying drawings.

[0036] like Figures 1 to 5 As shown, the present invention includes a rotary support 100, a dual-axis machine platform 200, and a chuck 300. A turntable 110 is rotatably mounted on the surface of the rotary support 100. A reduction servo 120 in the form of an outer rotor motor is fixedly mounted on the bottom of the turntable 110. The reduction servo 120 drives a gear ring 112 to engage with its inner side, thereby rotating the turntable 110, and in turn, the dual-axis machine platform 200 fixed to the turntable 110.

[0037] The dual-axis machine 200 includes a deflection table 210, a main shaft 220, a synchronization shaft 231, and first and second motors 230 and 240 mounted on opposite ends of the bearing frame 111. The deflection table 210 is connected to the synchronization shaft 231 via a transmission ring 211 and is driven by the first motor 230 for rotation. The main shaft 220 is driven by the second motor 240, achieving rotation perpendicular to the deflection table 210, thus meeting multi-angle machining requirements.

[0038] In this embodiment, through the ingenious design of the dual-axis machine 200, the deflection table 210 and the main shaft 220 can rotate independently or in conjunction in two different axial directions, thereby greatly improving the multi-directional processing capability of the machining center, which is particularly suitable for processing workpieces with complex shapes.

[0039] Furthermore, to further enhance machining accuracy, the present invention features a fixed grating sensor 250 mounted on the inner side of the deflection table 210, while a fixed grating ring 221 is sleeved onto the surface of the main shaft 220. The grating sensor 250 and grating ring 221 work together to detect the rotation angle of the main shaft 220 in real time, transmitting feedback signals to the control system, thereby enabling precise control of the main shaft 220. This design effectively improves machining accuracy and is particularly suitable for high-precision machining applications.

[0040] In addition, the chuck 300 adopts a three-jaw chuck structure, and its bottom surface slides against the top surface of the deflection table 210, which can firmly clamp the workpiece and move with the rotation of the deflection table 210 to ensure the stability of the workpiece during processing.

[0041] In summary, the utility model realizes multi-angle and high-precision processing functions in the fixed-beam gantry processing center through a series of optimized designs. It has the advantages of compact structure and easy operation, and is suitable for precision processing of complex workpieces.

[0042] The working principle and use process of this utility model:

[0043] The slewing support for fixed-beam gantry machining centers provided by this utility model achieves high-precision machining capabilities at multiple angles and directions through its innovative dual-axis rotation structure. The entire system consists of a slewing support, a turntable, a dual-axis machine platform, a chuck, and associated motors and sensors. Its operating principle is as follows:

[0044] Turntable Rotation: A turntable 110 is mounted on a turntable support 100. The bottom of the turntable engages with a gear ring 112 on the inside of the turntable via a reduction servo 120, which is an external rotor motor. When the reduction servo 120 is activated, it rotates the turntable 110 relative to the turntable support 100. This rotation changes the overall orientation of the dual-axis machine platform 200 and chuck 300, enabling preliminary angular adjustment.

[0045] Rotation of the dual-axis machine: The dual-axis machine 200 includes a deflection table 210 and a main shaft 220. The first motor 230 drives the synchronous shaft 231, which in turn drives the deflection table 210 to rotate around the bearing frame 111 to achieve deflection adjustment of the workpiece.

[0046] At the same time, the second motor 240 drives the main shaft 220 to rotate perpendicular to the deflection table 210, thereby adjusting the angle of the workpiece in another direction. The two rotating axes of the dual-axis machine can be controlled independently or in conjunction, enabling multi-angle processing of complex workpieces.

[0047] Precise Control: During machining, grating sensor 250 detects the rotation angle of main shaft 220 in real time. Working in conjunction with grating ring 221, the sensor sends feedback signals to the control system. The control system makes adjustments based on the detected angle information, ensuring high precision during machining.

[0048] Workpiece Clamping and Rotation: The chuck 300 features a three-jaw chuck structure that securely grips the workpiece. The chuck's bottom surface slides against the top surface of the deflection table 210, allowing the workpiece to rotate stably with the table, achieving the desired angles.

[0049] Usage Process

[0050] Installation and preparation: Install the slewing bracket on the working platform of the fixed beam gantry machining center and connect the electrical part to the control system of the machining center. After installation, check whether all connections are firm and ensure the stability of the system.

[0051] Workpiece clamping: The workpiece to be processed is secured to the chuck 300. The three-jaw chuck structure securely holds the workpiece, ensuring it does not loosen during rotation and machining. Adjust the chuck's clamping force according to the shape and size of the workpiece.

[0052] Initial angle adjustment: The control system activates the deceleration servo 120 to rotate the turntable 110 and adjust the initial angle position of the workpiece. This step is used to roughly locate the processing direction of the workpiece.

[0053] Precise Angle Adjustment: A control system activates the first motor 230 and the second motor 240 to control the rotation of the deflection table 210 and main shaft 220 of the dual-axis machine platform 200, precisely adjusting the workpiece's processing angle. During the adjustment process, data from the grating sensor 250 is used to ensure that each angle adjustment achieves the required accuracy.

[0054] Machining operation: After all angle adjustments are completed, the spindle of the machining center is started for machining operation. During the machining process, the rotary support can adjust the angle of the workpiece as needed to ensure that the machining tool can cut from the optimal angle.

[0055] Workpiece rotation and continued processing: If the processing requires multi-angle processing, the workpiece angle can be adjusted and multi-sided processing can be performed through the rotation function of the swivel bracket without re-clamping the workpiece. This can greatly reduce the time of re-clamping the workpiece and improve processing efficiency.

[0056] Machining completion: After machining is complete, stop all motors and the spindle of the machining center, unlock the chuck, and remove the finished workpiece. Finally, check the machining accuracy and surface quality of the workpiece to ensure that it meets the design requirements.

[0057] Maintenance and Care: Regularly inspect the slewing support's mechanical components and electrical connections to ensure stability and accuracy over long-term use. Lubricate and maintain components such as gear transmissions and bearings to extend the equipment's lifespan. Through the aforementioned operating principles and operational procedures, this utility model can effectively enhance the machining capabilities of fixed-beam gantry machining centers, demonstrating its unique advantages particularly in applications requiring complex, multi-angle machining.

[0058] Throughout this specification, terms such as "one embodiment," "some embodiments," or "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A slewing bracket for a fixed beam gantry machining center, characterized in that: include: A turntable (100), a dual-axis machine (200) and a chuck (300); a turntable (110) is rotatably mounted on the surface of the turntable (100); the dual-axis machine (200) is fixed to the surface of the turntable (110); a bearing frame (111) is fixedly mounted on the surface of the turntable (110); a reduction steering gear (120) is fixedly mounted on the bottom surface of the turntable (110); a gear ring (112) is provided on the inner side of the turntable (110); a transmission gear ring is provided on the outer periphery of the reduction steering gear (120) for transmission engagement with the inner side of the gear ring (112); the turntable (110) is rotated on the inner side of the turntable (100) under the drive of the reduction steering gear (120), thereby driving the dual-axis machine (200) to rotate.

2. The slewing bracket for a fixed beam gantry machining center according to claim 1, characterized in that: The dual-axis machine (200) comprises a deflection table (210), a main rotating shaft (220), and a first motor (230) and a second motor (240) fixed at both ends of a bearing frame (111); a synchronous shaft (231) is rotatably mounted on the surface of the bearing frame (111); the deflection table (210) is rotatably sleeved on the inner side of the bearing frame (111), and transmission rings (211) are respectively fixedly sleeved on both ends of the deflection table (210); the transmission rings (211) and the surface of the synchronous shaft (231) are connected via a belt transmission; the output end of the first motor (230) is transmission-connected to the surface of the synchronous shaft (231); the main rotating shaft (220) is rotatably mounted on the surface of the deflection table (210) perpendicularly to the surface direction of the deflection table (210); and the second motor (240) is used to drive the main rotating shaft (220) to rotate.

3. The slewing bracket for a fixed beam gantry machining center according to claim 2, characterized in that: A grating sensor (250) is fixedly mounted on the inner side of the deflection table (210), a grating ring (221) is fixedly sleeved on the surface of the main rotating shaft (220), and the grating ring (221) cooperates with the grating sensor (250) to achieve precise angle detection and feedback control of the main rotating shaft (220).

4. The slewing bracket for a fixed beam gantry machining center according to claim 1, characterized in that: The reduction steering gear (120) is an outer rotor motor, and the output end of the reduction steering gear (120) is in transmission engagement with the inner side of the gear ring (112) through the outer gear ring, thereby realizing rotational drive of the turntable (110).

5. The slewing bracket for a fixed beam gantry machining center according to claim 2, characterized in that: The synchronization shaft (231) is arranged in parallel with the deflection table (210), and one end of the synchronization shaft (231) is connected to the output end of the first motor (230) via a pulley group. The transmission ring (211) is coaxially arranged with the deflection table (210), thereby realizing rotation control of the deflection table (210).

6. The slewing bracket for a fixed beam gantry machining center according to claim 2, characterized in that: The first motor (230) and the second motor (240) are located on the same horizontal line as the deflection platform (210), and a pulley set or a gear set for transmission connection between the output end of the second motor (240) and the main rotating shaft (220) is provided on the inner side of the deflection platform (210).

7. The slewing bracket for a fixed beam gantry machining center according to claim 1, characterized in that: The chuck (300) is a three-claw chuck structure, and the bottom surface of the chuck (300) is in sliding contact with the top surface of the deflection table (210), and is used to fix the workpiece and rotate with the deflection table (210).

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