Workpiece detection clamping tool

Abstract

The utility model provides a work piece detection clamping tool belongs to clamping tool technical field, work piece detection clamping tool includes: rotating mechanism, rotary disc, support frame, moving mechanism, clamping jaw and electrical slip ring, when clamping the work piece of irregular shape, through making the movement of each clamping jaw different distance, to ensure that multiple clamping jaws clamp the work piece simultaneously, and ensure that the center line of work piece coincides with the center line of rotary disc, and then improve the applicability of product, and improve the position accuracy of product. Through installing electrical slip ring at the center of rotating mechanism, and making electrical slip ring be connected with multiple moving mechanism electricity simultaneously, to realize when rotating mechanism drives multiple moving mechanism and the work piece that is clamped to rotate, electrical slip ring can continue to power supply for moving mechanism, and can avoid cable entanglement, and pull, thereby ensuring that the work piece that detects can be mechanical arm scanner no dead angle scanning, and then improve the accuracy of work piece detection.

Description

Technical Field

[0001] This utility model belongs to the field of clamping fixture technology, specifically relating to a workpiece inspection clamping fixture. Background Technology

[0002] In related technologies, when inspecting workpieces, using conventional measuring tools is not only difficult and time-consuming, but also results in significant differences in measurement results for the same part due to the subjectivity of human fitting of the benchmark. This leads to weak comparability between multiple data points and affects the accuracy of workpiece inspection. Therefore, it is necessary to use a robotic arm scanner to perform blind-spot-free scanning of the workpiece for inspection.

[0003] When using a robotic arm scanner to scan a workpiece, it is necessary to clamp the workpiece with a special fixture in order to ensure its stability.

[0004] Existing technology (authorization announcement number: CN223848667U) discloses a workpiece clamping fixture for CNC machine tools, relating to the field of CNC machine tool technology. This utility model includes a machine tool, with a support plate inside the machine tool. A placement platform is provided on the top of the support plate, and several clamping components are provided on the outer surface of the placement platform. An adjustment component is provided inside the placement platform corresponding to the clamping components, and the clamping components and the adjustment components are dynamically connected. By pushing the clamping components, they can rotate outside the placement platform, and the clamping end of the clamping component can be adjusted in position according to the outer surface of the irregularly shaped workpiece. This arrangement allows the drive component to pull the clamping component through the adjustment component, ensuring that when the clamping component clamps and fixes the irregularly shaped workpiece, the clamping end of the clamping component can make relatively tight contact with the outer surface of the irregularly shaped workpiece, thereby avoiding the phenomenon of shaking that easily occurs when processing irregularly shaped workpieces.

[0005] In this prior art, when the clamping assembly clamps the workpiece, it cannot drive the workpiece to rotate, which makes it inconvenient for the robotic arm scanner to scan the workpiece; moreover, even if the placement stage is driven to rotate, the drive motor will rotate synchronously with the placement stage, which will cause the cable supplying power to the drive motor to become tangled and pulled, thus making it impossible to perform a scan of the workpiece without blind spots. Utility Model Content

[0006] To address the problems in existing technologies where the clamping assembly cannot rotate the workpiece, hindering scanning by the robotic arm scanner, and where even if the placement stage rotates, the synchronous rotation of the drive motor and stage can cause tangling and pulling of the power cable, further preventing comprehensive scanning, this invention provides a workpiece inspection clamping fixture. This fixture uses an electric slip ring installed at the center of a rotating mechanism, electrically connected to multiple moving mechanisms. This ensures that when the rotating mechanism drives the multiple moving mechanisms and the clamped workpiece to rotate, the electric slip ring continuously supplies power to the moving mechanisms, preventing cable tangling and pulling. This guarantees comprehensive scanning of the workpiece by the robotic arm scanner, improving the accuracy of workpiece inspection. The specific technical solution is as follows: A workpiece inspection clamping fixture includes: a rotating mechanism, a rotating disk, a support frame, a moving mechanism, grippers, and an electrical slip ring; the rotating disk is connected to the output end of the rotating mechanism, and the center line of the rotating disk coincides with the center line of the rotating mechanism; the support frame is mounted on the rotating disk; at least two moving mechanisms are mounted on the support frame and are evenly distributed along the center line of the rotating disk; the grippers are L-shaped, and at least two grippers are respectively connected to at least two moving mechanisms; the electrical slip ring is mounted at the center of the rotating mechanism and is simultaneously electrically connected to at least two moving mechanisms.

[0007] In addition, the workpiece detection clamping fixture in the above-mentioned technical solution provided by this utility model may also have the following additional technical features: In the above technical solution, there are four moving mechanisms and four grippers; the four moving mechanisms are arranged in pairs facing each other, and the four grippers are arranged in pairs facing each other.

[0008] In the above technical solution, the support frame is cross-shaped; four moving mechanisms are respectively installed on the four sides of the support frame.

[0009] In the above technical solution, the moving mechanism includes: a receiving groove, a lead screw, and a moving block; the receiving groove is located on the top of the support frame; the outer wall of the lead screw is provided with an external thread, the lead screw is located in the receiving groove, and both ends of the lead screw are rotatably connected to the support frame; the moving block is provided with a threaded hole, and the threaded hole is provided with an internal thread, the threaded hole of the moving block is fitted on the outside of the lead screw, and the gripper is installed on the top of the moving block; wherein, the external thread and the internal thread are compatible.

[0010] In the above technical solution, the moving mechanism also includes: a motor; the motor is installed on the outside of the support frame, the motor is connected to the lead screw, and the motor is electrically connected to the electrical slip ring.

[0011] In the above technical solution, the moving mechanism also includes: bellows dust covers; one end of each of the two bellows dust covers is connected to both ends of the receiving groove, and the other end of each of the two bellows dust covers is connected to both ends of the moving block, and the two bellows dust covers are located above the lead screw.

[0012] In the above technical solution, the moving block and the receiving groove are in clearance fit.

[0013] The workpiece inspection clamping fixture of this utility model has the following advantages compared with the prior art: 1. Multiple moving mechanisms are mounted on a support frame, and multiple L-shaped grippers are connected to these mechanisms. This allows each moving mechanism to independently drive the grippers, enabling precise control of the movement distance of each gripper. This ensures that when clamping regularly shaped workpieces, each gripper moves the same distance for rapid workpiece centering. Conversely, when clamping irregularly shaped workpieces, different gripper distances ensure simultaneous clamping and alignment of the workpiece's centerline with the rotary table's centerline. This improves product applicability and positional accuracy, ultimately enhancing the precision of subsequent workpiece scanning. An electric slip ring is installed at the center of the rotating mechanism and electrically connected to multiple moving mechanisms. This ensures continuous power supply to the moving mechanisms and the clamped workpiece as the rotating mechanism rotates, preventing cable tangling and pulling. This guarantees thorough scanning of the workpiece by the robotic arm scanner, improving the accuracy of workpiece inspection.

[0014] 2. By clamping the workpiece with four jaws, it is possible to clamp both regular-shaped and irregular-shaped workpieces with four jaws working together, thereby improving the applicability of the product. Moreover, compared to clamping the workpiece with five or more jaws, it can reduce the contact area between the jaws and the workpiece, thus facilitating the robotic arm scanner to perform blind-angle scanning of the workpiece and improving the scanning accuracy.

[0015] 3. By making the support frame cross-shaped and installing the four moving mechanisms on the four sides of the support frame respectively, the space occupied by the support frame can be reduced while ensuring that the support frame can support the four moving mechanisms. This allows a sufficient number of scanning points to be placed on the rotary table, thereby improving the scanning efficiency of the robotic arm scanner on the workpiece.

[0016] 4. By fitting the threaded hole of the moving block onto the outside of the lead screw and installing the gripper on top of the moving block, the moving block and the lead screw are connected by a thread. This allows the lead screw to rotate, causing the lead screw to drive the moving block and gripper to move, thereby enabling precise adjustment of the gripper's position to ensure that the gripper clamps the workpiece.

[0017] 5. By mounting the motor on the outside of the support frame, connecting the motor to the lead screw, and electrically connecting the motor to the electric slip ring, the support frame supports the motor, enabling the motor to drive the lead screw to rotate. This allows the electric slip ring to continuously supply power to the motor at an unlimited angle, thereby enabling the controller to control the motor and precisely control the movement distance of the lead screw-driven moving block and gripper, thus improving the user experience of the product.

[0018] 6. Connect one end of each of the two accordion dust covers to the two ends of the receiving groove, and connect the other end of each of the two accordion dust covers to the two ends of the moving block. Position the two accordion dust covers above the lead screw so that the moving block can drive the two accordion dust covers to extend and retract. This allows the two accordion dust covers to work together to seal the top of the receiving groove, thereby preventing dust and debris in the workshop from entering the receiving groove and interfering with the lead screw, thus improving the accuracy of the lead screw driving the moving block.

[0019] 7. By setting the moving block and the receiving groove to a clearance fit, the moving block can move within the receiving groove and avoid interference between the moving block and the inner wall of the receiving groove. At the same time, the receiving groove can guide the moving block, thereby preventing the moving block from rotating, thus improving the stability of the gripper and improving the clamping effect of the gripper on the workpiece, thereby improving the user experience of the product. Attached Figure Description

[0020] Figure 1 This is one of the perspective views of a workpiece inspection clamping fixture according to the present invention; Figure 2 This is a second perspective view of a workpiece inspection clamping fixture according to the present invention; Figure 3 for Figure 2 Enlarged view of a portion at point A; Figure 4 This is a perspective view of the rotating mechanism and rotating disk of this utility model; in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 10 Rotating mechanism, 11 Rotary disk, 12 Support frame, 13 Moving mechanism, 131 Receiving groove, 132 Lead screw, 133 Moving block, 134 Motor, 14 Gripper, 15 Electric slip ring, 16 Workpiece. Detailed Implementation

[0021] The following are specific implementation cases and appendices. Figures 1 to 4 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0022] A workpiece inspection clamping fixture, such as Figures 1 to 4 As shown, the workpiece inspection clamping fixture includes: a rotating mechanism 10, a rotating disk 11, a support frame 12, a moving mechanism 13, grippers 14, and an electrical slip ring 15; the rotating disk 11 is connected to the output end of the rotating mechanism 10, and the center line of the rotating disk 11 coincides with the center line of the rotating mechanism 10; the support frame 12 is mounted on the rotating disk 11; at least two moving mechanisms 13 are mounted on the support frame 12, and the at least two moving mechanisms 13 are evenly distributed along the center line of the rotating disk 11; the grippers 14 are L-shaped, and at least two grippers 14 are respectively connected to at least two moving mechanisms 13; the electrical slip ring 15 is mounted at the center of the rotating mechanism 10, and the electrical slip ring 15 is simultaneously electrically connected to at least two moving mechanisms 13.

[0023] By connecting the rotating disk 11 to the output end of the rotating mechanism 10, the center line of the rotating disk 11 is made to coincide with the center line of the rotating mechanism 10. The support frame 12 is installed on the rotating disk 11 so that the rotating disk 11 supports the support frame 12, thereby enabling the rotating mechanism 10 to rotate the rotating disk 11 and the support frame 12. By installing multiple moving mechanisms 13 on the support frame 12 and connecting multiple L-shaped grippers 14 to the multiple moving mechanisms 13 respectively, the moving mechanisms 13 can drive the grippers 14 to move, thereby enabling the multiple grippers 14 to cooperate in clamping the workpiece 16 to be inspected, and thus enabling the workpiece 16, the support frame 12 and the rotating disk 11 to rotate synchronously, so that the robotic arm scanner can perform a blind-angle scan of the workpiece 16. By installing the electric slip ring 15 at the center of the rotating mechanism 10 and simultaneously connecting the electric slip ring 15 to at least two moving mechanisms 13, the output end of the rotating mechanism 10 can rotate around the electric slip ring 15. This allows the electric slip ring 15 to continuously supply power to the rotating moving mechanism 13 at an infinite angle, thus avoiding cable tangling and pulling caused by wired power supply to the moving mechanism 13, and ensuring that the product can operate stably for a long time.

[0024] In actual use, the workpiece 16 to be inspected is first hoisted onto the rotating disk 11 using a hoisting device, and positioned between multiple grippers 14. Then, multiple moving mechanisms 13 are simultaneously activated, causing them to move the grippers 14 toward the workpiece 16, allowing the workpiece 16 to be placed on the grippers 14 simultaneously for initial positioning. Next, multiple moving mechanisms 13 are activated individually, allowing each gripper 14 to move independently, thus precisely controlling the movement distance of each gripper 14 to ensure that multiple grippers 14 simultaneously clamp the workpiece 16. This ensures that the centerline of the workpiece 16 coincides with the centerline of the rotating disk 11, improving the accuracy of the workpiece 16's position and enhancing the subsequent scanning effect. Finally, the rotating mechanism 10 is activated, causing the rotating disk 11 and the workpiece 16 to rotate, enabling the robotic arm scanner to perform a comprehensive scan of the workpiece 16.

[0025] With the above structure, multiple moving mechanisms 13 are mounted on the support frame 12, and multiple L-shaped grippers 14 are connected to the multiple moving mechanisms 13 respectively. This allows the multiple moving mechanisms 13 to drive the multiple grippers 14 to move, so as to precisely control the moving distance of each gripper 14. This ensures that when clamping a workpiece 16 with a regular shape, each gripper 14 moves the same distance, so as to quickly center the workpiece 16. At the same time, when clamping an irregularly shaped workpiece 16, the movement distance of each gripper 14 is made different, so as to ensure that multiple grippers 14 clamp the workpiece 16 at the same time and ensure that the center line of the workpiece 16 coincides with the center line of the rotary disk 11. This improves the applicability of the product and the positional accuracy of the product, thereby improving the accuracy of subsequent scanning of the workpiece 16. By installing the electric slip ring 15 at the center of the rotating mechanism 10 and simultaneously connecting the electric slip ring 15 to multiple moving mechanisms 13, the electric slip ring 15 can continuously supply power to the moving mechanisms 13 when the rotating mechanism 10 drives the multiple moving mechanisms 13 and the clamped workpiece 16 to rotate. This also prevents the cables from getting tangled or pulled, thus ensuring that the workpiece 16 to be inspected can be scanned without blind spots by the robotic arm scanner, thereby improving the accuracy of the inspection of the workpiece 16.

[0026] Specifically, the product is equipped with a safety protection system around its perimeter to close off the scanning area when the workpiece 16 is clamped and scanned by the robotic arm scanner, preventing personnel from accidentally touching the moving mechanism 13 and thus improving the safety of the product.

[0027] Specifically, the loading sensor is mounted on the support frame 12, and the loading sensor is electrically connected to multiple moving mechanisms 13 at the same time, so that when the workpiece 16 to be detected moves above the support frame 12 and the workpiece 16 is opposite to multiple grippers 14, the multiple moving mechanisms 13 can drive the grippers 14 to move respectively, so as to improve the clamping efficiency of the workpiece 16.

[0028] Specifically, the rotating mechanism 10 is a double-layer coaxial independent drive displacement mechanism, comprising, from bottom to top, a fixed base frame, a lower base rotation unit, and an upper worktable rotation unit. The lower base rotation unit is equipped with a first servo drive assembly and a heavy-duty slewing bearing, enabling continuous counterclockwise 360° rotation. The upper worktable rotation unit is independently equipped with a second servo drive assembly, capable of driving the worktable to rotate clockwise 180°. The two rotation mechanisms can be linked to achieve compound rotation, with a system output torque of 190–500 Nm. It can carry workpieces of various specifications 16; by adjusting the posture of workpiece 16, the robotic arm can scan the light source to complete the full-area point cloud acquisition of workpiece 16.

[0029] In embodiments of this utility model, such as Figures 1 to 4 As shown, there are four moving mechanisms 13 and four grippers 14; the four moving mechanisms 13 are arranged opposite each other in pairs, and the four grippers 14 are arranged opposite each other in pairs.

[0030] By setting the number of moving mechanisms 13 to four and the number of grippers 14 to four, and arranging the four moving mechanisms 13 and the four grippers 14 in pairs facing each other, the four moving mechanisms 13 can each drive the four grippers 14 to move, thereby enabling the four grippers 14 to cooperate in clamping the workpiece 16 and improving the stability of the workpiece 16. By using four grippers 14 to clamp the workpiece 16, both regular-shaped and irregular-shaped workpieces 16 can be clamped, thus improving the product's applicability. Furthermore, compared to clamping the workpiece 16 with five or more grippers 14, the contact area between the grippers 14 and the workpiece 16 is reduced, facilitating the robotic arm scanner to perform blind-angle scanning of the workpiece 16 and improving scanning accuracy.

[0031] In embodiments of this utility model, such as Figures 1 to 4 As shown, the support frame 12 is cross-shaped; four moving mechanisms 13 are respectively installed on the four sides of the support frame 12.

[0032] By making the support frame 12 cross-shaped and installing the four moving mechanisms 13 on the four sides of the support frame 12 respectively, the space occupied by the support frame 12 can be reduced while ensuring that the support frame 12 supports the four moving mechanisms 13. This allows a sufficient number of scanning points to be placed on the rotating disk 11, thereby improving the scanning efficiency of the robotic arm scanner on the workpiece 16.

[0033] In embodiments of this utility model, such as Figures 1 to 4 As shown, the moving mechanism 13 includes: a receiving groove 131, a lead screw 132, and a moving block 133; the receiving groove 131 is disposed on the top of the support frame 12; the lead screw 132 has an external thread on its outer wall, the lead screw 132 is located in the receiving groove 131, and both ends of the lead screw 132 are rotatably connected to the support frame 12; the moving block 133 has a threaded hole, and the threaded hole has an internal thread, the threaded hole of the moving block 133 is fitted onto the outside of the lead screw 132, and the gripper 14 is installed on the top of the moving block 133; wherein, the external thread and the internal thread are adapted to each other.

[0034] By setting the receiving groove 131 on the top of the support frame 12, the lead screw 132 is located in the receiving groove 131, and both ends of the lead screw 132 are rotatably connected to the support frame 12, so that the lead screw 132 is hidden in the receiving groove 131 and the support frame 12 supports the lead screw 132. This allows the lead screw 132 to rotate within the receiving groove 131 and avoids damage to the lead screw 132 due to interference with other components. This not only improves product quality but also enhances product operational stability. By fitting the threaded hole of the moving block 133 onto the outside of the lead screw 132 and installing the gripper 14 on the top of the moving block 133, the moving block 133 and the lead screw 132 are threadedly connected. This allows the lead screw 132 to rotate, causing the moving block 133 and the gripper 14 to move. This allows for precise adjustment of the position of the gripper 14 to ensure that the gripper 14 clamps the workpiece 16.

[0035] In embodiments of this utility model, such as Figures 1 to 4 As shown, the moving mechanism 13 also includes a motor 134; the motor 134 is mounted on the outside of the support frame 12, the motor 134 is connected to the lead screw 132, and the motor 134 is electrically connected to the electric slip ring 15.

[0036] By mounting the motor 134 on the outside of the support frame 12, connecting the motor 134 to the lead screw 132, and electrically connecting the motor 134 to the electric slip ring 15, the support frame 12 supports the motor 134, enabling the motor 134 to drive the lead screw 132 to rotate. This allows the electric slip ring 15 to continuously supply power to the motor 134 at an infinite angle, thereby enabling the controller to control the motor 134 and precisely control the movement distance of the lead screw 132 driving the moving block 133 and the gripper 14, thus improving the user experience of the product.

[0037] In embodiments of this utility model, such as Figures 1 to 4 As shown, the moving mechanism 13 also includes: accordion dust covers; one end of each of the two accordion dust covers is connected to both ends of the receiving groove 131, and the other end of each of the two accordion dust covers is connected to both ends of the moving block 133, and the two accordion dust covers are located above the lead screw 132.

[0038] One end of each of the two accordion dust covers is connected to one end of the receiving groove 131, and the other end of each of the two accordion dust covers is connected to one end of the moving block 133. The two accordion dust covers are positioned above the lead screw 132 so that the moving block 133 can drive the two accordion dust covers to extend and retract. This allows the two accordion dust covers to cooperate in sealing the top of the receiving groove 131, thereby preventing dust and debris in the workshop from entering the receiving groove 131 and interfering with the lead screw 132, thus improving the accuracy of the lead screw 132 in driving the moving block 133.

[0039] In an embodiment of this utility model, the moving block 133 and the receiving groove 131 are in clearance fit.

[0040] By setting the moving block 133 and the receiving groove 131 to a clearance fit, the moving block 133 can move within the receiving groove 131, and interference between the moving block 133 and the inner wall of the receiving groove 131 is avoided. At the same time, the receiving groove 131 can guide the moving block 133, thereby preventing the moving block 133 from rotating, thus improving the stability of the gripper 14, and further improving the clamping effect of the gripper 14 on the workpiece 16, thereby improving the user experience of the product.

[0041] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0042] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above 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 one or more embodiments or examples.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A workpiece inspection clamping fixture, characterized in that, The workpiece inspection clamping fixture includes: Rotating mechanism; A rotating disk is connected to the output end of the rotating mechanism, and the center line of the rotating disk coincides with the center line of the rotating mechanism; A support frame, which is mounted on the rotating disk; The moving mechanism, at least two of the moving mechanisms are mounted on the support frame, and the at least two moving mechanisms are evenly distributed along the center line of the rotating disk; The gripper is L-shaped, and at least two of the grippers are respectively connected to at least two of the moving mechanisms; An electrical slip ring is installed at the center of the rotating mechanism and is simultaneously electrically connected to at least two of the moving mechanisms.

2. The workpiece inspection clamping fixture according to claim 1, characterized in that: The number of the moving mechanisms is four; The number of grippers is four; The four moving mechanisms are arranged opposite each other in pairs, and the four grippers are arranged opposite each other in pairs.

3. The workpiece inspection clamping fixture according to claim 2, characterized in that: The support frame is cross-shaped; The four moving mechanisms are respectively installed on the four sides of the support frame.

4. The workpiece inspection clamping fixture according to claim 1, characterized in that, The moving mechanism includes: A receiving groove is provided on the top of the support frame; A lead screw, wherein an external thread is provided on the outer wall of the lead screw, the lead screw is located in the receiving groove, and both ends of the lead screw are rotatably connected to the support frame; A movable block, wherein a threaded hole is provided in the movable block and an internal thread is provided in the threaded hole, the threaded hole of the movable block is fitted onto the outside of the lead screw, and the gripper is installed on the top of the movable block; The external thread is adapted to the internal thread.

5. The workpiece inspection clamping fixture according to claim 4, characterized in that, The mobile mechanism also includes: The motor is mounted on the outside of the support frame, connected to the lead screw, and electrically connected to the electrical slip ring.

6. The workpiece inspection clamping fixture according to claim 5, characterized in that, The moving mechanism also includes: The two accordion dust covers have one end connected to both ends of the receiving groove, and the other end connected to both ends of the moving block, with the two accordion dust covers positioned above the lead screw.

7. The workpiece inspection clamping fixture according to claim 4, characterized in that: The movable block and the receiving groove are in clearance fit.

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