Double-station clamping tool for unmanned aerial vehicle arm milling

Abstract

The utility model relates to unmanned aerial vehicle manufacturing technical field especially a kind of double-station clamping tool for unmanned aerial vehicle arm milling machining. The front profiling positioning member and the rear profiling positioning member take the force-receiving table top as installation reference, and the two are mutually parallel and interval set distance, and jointly constitute the positioning reference of unmanned aerial vehicle arm;Power clamping unit includes linear motion element, front connecting rod mechanism, rear connecting rod mechanism, front pressure piece and rear pressure piece, linear motion element is fixed on force-receiving table, and its power output end synchronous transmission connects front connecting rod mechanism and rear connecting rod mechanism, and front pressure piece, rear pressure piece are respectively fixed to corresponding connecting rod mechanism end, for pressing the unmanned aerial vehicle arm of front and rear milling station. In this way, on the one hand, the tedious process of traditional manual piece-by-piece clamping is saved, and the clamping time is greatly shortened;On the other hand, through synchronous transmission and profiling positioning, manual operation error is effectively avoided, and the consistency and precision of double-station unmanned aerial vehicle arm clamping are ensured.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) manufacturing technology, and in particular to a dual-station clamping fixture for milling UAV arms. Background Technology

[0002] The drone arm is a core structural component that carries the payload and transmits power to the aircraft, and its machining accuracy directly determines flight stability and control reliability. As drones upgrade towards lightweight and high-payload designs, the arms are often made of high-strength aluminum alloys and carbon fiber composite materials to create thin-walled, irregularly shaped structures. These require high-precision milling to complete the machining of key features such as shaft holes and flange positioning surfaces, placing extremely high demands on the accuracy and efficiency of the clamping fixtures.

[0003] Currently, the industry generally adopts a manual clamping method based on simple tooling, relying on a fixing structure of "multiple sets of screws + pressure plates" (such as...). Figure 1 As shown in the diagram, however, several problems were exposed during implementation: First, the operation process was cumbersome and inefficient. The operator had to symmetrically turn multiple sets of screws one by one, first adjusting the posture of the machine arm to fit the positioning surface, and then gradually tightening the pressure plate to complete the clamping. The clamping time for a single piece was extremely long, and the auxiliary clamping time far exceeded the actual processing time, resulting in insufficient effective utilization of the machine tool. Second, the accuracy of manual clamping depended entirely on the operator's experience. Uneven force control could easily lead to machine arm positioning deviations. In minor cases, this could cause the coaxiality of the milled shaft hole and the parallelism of the flange to exceed the tolerance, resulting in the scrapping of the entire machine arm. In severe cases, if the workpiece was not completely fixed or its position was offset, abnormal interference between the tool and the workpiece could occur during milling, leading to tool breakage and machine tool spindle overload shutdown.

[0004] In summary, technical personnel are urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a dual-station clamping fixture for milling unmanned aerial vehicle (UAV) arms, which aims to solve the problems in the existing technology where UAV arm milling relies on simple fixtures for manual clamping, resulting in auxiliary clamping time far exceeding processing time, low machine tool utilization, and easy positioning deviations during manual operation, making it difficult to meet the requirements of high-precision and high-efficiency processing.

[0006] This utility model relates to a dual-station clamping fixture for milling the arm of a drone, including a support platform, a front contour positioning component, a rear contour positioning component, and multiple power clamping units arranged linearly along the length of the support platform. Both the front and rear contour positioning components use the platform of the support table as the installation reference. They are parallel to each other and spaced at a set distance, serving as positioning references for the UAV arm. The power clamping unit includes a linear motion element, a front linkage mechanism, a rear linkage mechanism, a front pressure component, and a rear pressure component. The linear motion element is fixed to the support platform, and its power output end is simultaneously connected to both the front and rear linkage mechanisms. The front pressure component is fixed to the end of the front linkage mechanism and is used to directly press against the drone arm of the front milling station. The rear pressure component is fixed to the end of the rear linkage mechanism and is used to directly press against the drone arm of the rear milling station. When the linear motion element drives the front linkage mechanism and the rear linkage mechanism to move synchronously, it drives the front pressure component and the rear pressure component to press and lock the UAV arms of the front and rear milling stations respectively.

[0007] As a further improvement to the technical solution disclosed in this utility model, the positioning surface of the front contour positioning component and the pressure surface of the front pressure component are both adapted to the outer contour of the UAV arm at the front milling station; the positioning surface of the rear contour positioning component and the pressure surface of the rear pressure component are both adapted to the outer contour of the UAV arm at the rear milling station.

[0008] As a further improvement to the technical solution disclosed in this utility model, both the front contour positioning component and the rear contour positioning component are precisely positioned with the support platform by positioning pins and fastened to the support platform by bolts.

[0009] As a further improvement to the technical solution disclosed in this utility model, the linear motion element is preferably any one of a cylinder, a hydraulic cylinder, or a linear motor.

[0010] As a further improvement to the technical solution disclosed in this utility model, both the front pressure application component and the rear pressure application component have elastic buffer pads embedded in their pressure application surfaces.

[0011] As a further improvement to the technical solution disclosed in this utility model, the front linkage mechanism and the rear linkage mechanism have the same design structure; the front linkage mechanism includes a front hinge seat, a front rocker arm, and a front connecting rod; the front hinge seat is fixed to the support platform; one end of the front rocker arm is hinged to the front hinge seat, and the other end is hinged to the middle of the front connecting rod; one end of the front connecting rod is hinged to the power output end of the linear motion element, and the other end is used to fix the front pressure component; when the linear motion element performs telescopic movement, the front rocker arm drives the front connecting rod to swing, so that the front pressure component can achieve the pressing or disengaging action on the UAV arm.

[0012] As a further improvement to the technical solution disclosed in this utility model, after the UAV arm is clamped, the hinge point of the front rocker and the front connecting rod, the hinge point of the front connecting rod and the power output end of the linear motion element, and the connection point of the front connecting rod and the front pressure component are collinear, and the length of the front rocker is 1 / 4 to 1 / 3 of the length of the front connecting rod.

[0013] As a further improvement of the technical solution disclosed in this utility model, the front pressure member is detachably fixed to the front connecting rod by means of at least two screws; the front pressure member is formed with a threaded hole adapted to the screws, while the front connecting rod is formed with a mounting through hole for the screws to pass through freely.

[0014] In practical applications, the dual-station clamping fixture for milling UAV arms disclosed in this utility model can achieve at least the following beneficial technical effects, specifically: 1) Adopting a dual-station parallel layout and with the synchronous action design of the power clamping unit, the front and rear pressure components move simultaneously, realizing one-time precise clamping and locking of the drone arms of the two milling stations. No batch operation is required, which greatly shortens the total time of the clamping process and effectively improves the workpiece processing efficiency per unit time. 2) Thanks to the synchronous action design of the rear linkage mechanism and the front pressure component, the clamping force, pressure rate and final clamping state of the front and rear stations are completely consistent, avoiding the positioning reference offset caused by the uneven clamping force and misalignment of the pressure sequence of different stations, and providing a stable and uniform clamping basis for subsequent milling operations. 3) The front and rear contour positioning components form a large-area contact with the surface of the robotic arm for positioning. Combined with the targeted pressing of the front and rear pressure components, this facilitates the construction of a multi-contact, high-precision positioning and clamping system, effectively ensuring the positional accuracy of the robotic arm after clamping. Furthermore, the front, rear, front, and rear contour positioning components are all independent components. When processing robotic arms of different models, they can be directly adapted and replaced without adjusting the core structure such as the support platform and power unit. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of a clamping fixture used for milling machining of UAV arms in the prior art. Figure 2 This is a three-dimensional schematic diagram of the dual-station clamping fixture for milling the arm of a drone disclosed in this utility model.

[0017] Figure 3 yes Figure 2 The front view.

[0018] Figure 4 yes Figure 3AA sectional view.

[0019] Figure 5 This is a three-dimensional schematic diagram of the power clamping unit in the dual-station clamping fixture for milling the unmanned aerial vehicle arm disclosed in this utility model.

[0020] Figure 6 This is a three-dimensional schematic diagram of the power clamping unit in the dual-station clamping fixture for milling the unmanned aerial vehicle arm disclosed in this utility model, from another perspective.

[0021] 1-Supporting platform; 2-Front contour positioning component; 3-Rear contour positioning component; 4-Power clamping unit; 41-Cylinder; 42-Front linkage mechanism; 421-Front hinge seat; 422-Front rocker arm; 423-Front connecting rod; 43-Rear linkage mechanism; 431-Rear hinge seat; 432-Rear rocker arm; 433-Rear connecting rod; 44-Front pressure application component; 45-Rear pressure application component; 46-Screw; 5-Positioning pin; 6-Bolt. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to specific embodiments. Figure 2 This illustration shows a three-dimensional schematic diagram of the dual-station clamping fixture for milling the UAV arm disclosed in this utility model. It can be seen that it mainly consists of a support platform 1, a front contour positioning component 2, a rear contour positioning component 3, and multiple power clamping units 4 arranged linearly along the length of the support platform 1. The support platform 1 serves as the bearing foundation, providing a stable mounting reference for the front contour positioning component 2, the rear contour positioning component 3, and the power clamping units 4. The front contour positioning component 2, the rear contour positioning component 3, and the power clamping units 4 work together to achieve precise positioning and synchronous clamping of the dual-station UAV arm, thus meeting the requirements of efficient milling. Both the front contour positioning component 2 and the rear contour positioning component 3 use the platform surface of the support table 1 as the installation reference. They are parallel to each other and spaced at a predetermined distance, serving as the positioning reference for the UAV arm. To ensure positioning accuracy and ease of assembly and disassembly, both the front contour positioning component 2 and the rear contour positioning component 3 are precisely positioned to the support table 1 via positioning pins 5 and securely connected to it via bolts 6. The positioning pins 5 effectively eliminate reference offset caused by installation gaps, while the bolts 6 ensure that the front contour positioning component 2 and the rear contour positioning component 3 will not loosen in the high-frequency vibration milling environment, further improving positioning stability. It is worth noting that the positioning surface of the front contour positioning component 2 is adapted to the outer contour of the UAV arm at the front milling station, and the positioning surface of the rear contour positioning component 3 is adapted to the outer contour of the UAV arm at the rear milling station. Through contour fitting design, the positioning component and the arm surface form a large-area contact, providing a precise initial position reference for subsequent clamping actions and ensuring the consistency of the clamping position of each arm. like Figure 3 , Figure 4 As shown, the power clamping unit 4 mainly consists of a cylinder 41, a front linkage mechanism 42, a rear linkage mechanism 43, a front pressure application component 44, and a rear pressure application component 45. The cylinder body of the cylinder 41 (or a hydraulic cylinder or linear motor can be selected according to actual processing requirements) is fixed to the bottom of the support platform 1. Its power output end is simultaneously connected to both the front linkage mechanism 42 and the rear linkage mechanism 43, achieving a single power source driving synchronous action design for two workstations.

[0023] like Figures 4-6 As shown, both the front linkage mechanism 42 and the rear linkage mechanism 43 adopt the same design structure. Taking the front linkage mechanism 42 as an example, it includes a front hinge seat 421, a front rocker arm 422, and a front connecting rod 423. The front hinge seat 421 is fixed to the platform of the support table 1 by bolts, serving as the fixed hinge point of the linkage mechanism; one end of the front rocker arm 422 is hinged to the front hinge seat 421, and the other end is hinged to the middle of the front connecting rod 423; one end of the front connecting rod 423 is hinged to the power output end of the cylinder 41, and the other end is used to fix and install the front pressure component 44. When the cylinder 41 performs telescopic movement, the lever transmission action of the front rocker arm 422 drives the front connecting rod 423 to swing around the front hinge seat 421, ultimately realizing the pressing or disengaging action of the front pressure component 44 against the front milling station arm.

[0024] To further improve the stability of the clamping state, this utility model has optimized the dimensional relationship between the front linkage mechanism 42 and the rear linkage mechanism 43. Taking the front linkage mechanism 42 as an example, after the UAV arm is clamped, the hinge points of the front rocker arm 422 and the front linkage 423, the hinge point of the front linkage 423 and the power output end of the cylinder 41, and the connection point of the front linkage 423 and the front pressure component 44 are collinear, forming a "dead point positioning" structure, which can effectively prevent the pressure component from loosening due to vibration during milling. At the same time, the length of the front rocker arm 422 is controlled to be 1 / 4 to 1 / 3 of the length of the front linkage 423. Through the optimization of the lever ratio, the clamping force of the front pressure component 44 can be effectively increased under the premise that the output force of the cylinder 41 remains unchanged, ensuring that the arm does not shift during processing. As components that directly contact the drone arm, the design of the front pressure applying member 44 and the rear pressure applying member 45 directly affects the surface quality of the drone arm and the reliability of clamping. On one hand, both the front pressure applying member 44 and the rear pressure applying member 45 have elastic buffer pads (not shown in the figure) embedded in their pressure surfaces. The buffer pads are preferably made of rubber to absorb impact during clamping and prevent damage to the drone arm surface caused by rigid contact. On the other hand, the front pressure applying member 44 is detachably fixed to the front connecting rod 423 using at least two screws 46 (e.g., ...). Figures 4-6 (As shown in the diagram). The front pressure-applying component 44 is formed with a threaded hole adapted to the screw 46, while the front connecting rod 423 is formed with a mounting through hole for the screw 46 to pass through freely. When machining different models of UAV arms, only the screw 46 needs to be removed and the adapted front pressure-applying component 44 and rear pressure-applying component 45 need to be replaced. There is no need to adjust the core structure such as the bearing platform 1 and the cylinder 41, thereby greatly improving the versatility of the clamping fixture. In actual operation, after the two sets of UAV arms are lowered relative to the front contour positioning component 2 and the rear contour positioning component 3, cylinder 41 is activated. Its power output synchronously drives the front linkage mechanism 42 and the rear linkage mechanism 43 to move: the front linkage mechanism 42 drives the front pressure component 44 to move towards the front contour positioning component 2, pressing the UAV arm of the front station onto the positioning surface of the front contour positioning component 2. At the same time, the rear linkage mechanism 43 drives the rear pressure component 45 to move towards the rear contour positioning component 3, pressing the UAV arm of the rear station onto the positioning surface of the rear contour positioning component 3. By adopting a dual-station parallel layout and coordinating with the synchronous action design of the power clamping unit 4, the front pressure component 44 and the rear pressure component 45 move simultaneously, achieving one-time precise clamping and locking of the UAV arms of the two milling stations. This eliminates the need for batch operations, significantly shortens the total time of the clamping process, and effectively improves the workpiece processing efficiency per unit time.

[0025] Finally, it should be noted that thanks to the synchronized action of the front linkage mechanism 42 and the rear linkage mechanism 43, the clamping force, pressure application rate and final clamping state of the front and rear stations are effectively ensured to be completely consistent. This avoids the offset of the positioning reference caused by the uneven clamping force and misalignment of the pressure application sequence of different stations, providing a stable and uniform clamping reference for subsequent milling operations and ensuring the consistency of the machining dimensions of the two stations.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-station clamping fixture for milling unmanned aerial vehicle (UAV) arms, characterized in that, It includes a support platform, a front contour positioning component, a rear contour positioning component, and multiple power clamping units arranged linearly along the length of the support platform. Both the front contour positioning component and the rear contour positioning component are installed with the platform of the support table as the installation reference. They are parallel to each other and spaced at a set distance, and both serve as the positioning reference for the UAV arm. The power clamping unit includes a linear motion element, a front linkage mechanism, a rear linkage mechanism, a front pressure component, and a rear pressure component. The linear motion element is fixed to the support platform, and its power output end is simultaneously connected to the front linkage mechanism and the rear linkage mechanism. The front pressure component is fixed to the end of the front linkage mechanism and is used to directly press against the UAV arm of the front milling station. The rear pressure component is fixed to the end of the rear linkage mechanism and is used to directly press against the UAV arm of the rear milling station. When the linear motion element drives the front linkage mechanism and the rear linkage mechanism to move synchronously, it drives the front pressure member and the rear pressure member to press and lock the UAV arms of the front and rear milling stations respectively.

2. The dual-station clamping fixture for milling unmanned aerial vehicle (UAV) arms according to claim 1, characterized in that, The positioning surface of the front contouring positioning component and the pressure surface of the front pressure application component are both adapted to the outer contour of the UAV arm at the front milling station; the positioning surface of the rear contouring positioning component and the pressure surface of the rear pressure application component are both adapted to the outer contour of the UAV arm at the rear milling station.

3. The dual-station clamping fixture for milling unmanned aerial vehicle (UAV) arms according to claim 1, characterized in that, Both the front contour positioning component and the rear contour positioning component are precisely positioned with the support platform by positioning pins and are fastened to the support platform by bolts.

4. The dual-station clamping fixture for milling unmanned aerial vehicle (UAV) arms according to claim 1, characterized in that, The linear motion element is any one of a cylinder, a hydraulic cylinder, or a linear motor.

5. The dual-station clamping fixture for milling unmanned aerial vehicle (UAV) arms according to claim 1, characterized in that, Both the front pressure application component and the rear pressure application component have elastic buffer pads embedded in their pressure application surfaces.

6. The dual-station clamping fixture for milling unmanned aerial vehicle (UAV) arms according to any one of claims 1-5, characterized in that, Both the front linkage mechanism and the rear linkage mechanism have the same design structure; the front linkage mechanism includes a front hinge seat, a front rocker arm, and a front connecting rod; the front hinge seat is fixed to the support platform; one end of the front rocker arm is hinged to the front hinge seat, and the other end is hinged to the middle of the front connecting rod; one end of the front connecting rod is hinged to the power output end of the linear motion element, and the other end is used to fix the front pressure member; when the linear motion element performs telescopic movement, the front rocker arm drives the front connecting rod to swing, so that the front pressure member can perform pressing or disengaging actions on the UAV arm.

7. The dual-station clamping fixture for milling unmanned aerial vehicle (UAV) arms according to claim 6, characterized in that, Once the drone arm is clamped, the hinge point between the front rocker arm and the front connecting rod, the hinge point between the front connecting rod and the power output end of the linear motion element, and the connection point between the front connecting rod and the front pressure component are collinear, and the length of the front rocker arm is 1 / 4 to 1 / 3 of the length of the front connecting rod.

8. The dual-station clamping fixture for milling unmanned aerial vehicle (UAV) arms according to claim 6, characterized in that, The front pressure member is detachably fixed to the front connecting rod by means of at least two screws; the front pressure member is formed with a threaded hole adapted to the screws, and the front connecting rod is formed with a mounting through hole for the screws to pass through freely.

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