An integrated screw fastening tool module
By designing an integrated screw fastening tooling module, the limitations of existing screw fastening tooling equipment in terms of compatibility are solved, enabling application in multiple scenarios and precise fastening, thereby improving production flexibility and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINAN BAICHUAN IND AUTOMATION EQUIP CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-31
AI Technical Summary
Existing screw fastening tooling equipment has limitations in single-device adaptability, low scenario reuse rate, inability to quickly switch between standardized and complex assembly scenarios, and insufficient production flexibility.
An integrated screw fastening fixture module was designed, comprising a connecting plate, a screw fastening fixture, and a calibration unit. It is compatible with linear modules and assembly robots. It is fixed to the robot end effector via ISO flange holes and to the linear module via a row of holes, enabling rapid docking. Precise fastening is achieved through the calibration unit.
The screw fastening tooling module enables multi-scenario use in different assembly scenarios, improving production flexibility and ensuring the accuracy and efficiency of screw fastening.
Smart Images
Figure CN224575092U_ABST
Abstract
Description
Technical Field
[0001] This utility model specifically relates to an integrated screw fastening tooling module, belonging to the field of automatic assembly equipment technology. Background Technology
[0002] Existing screw-fastening fixtures are mostly dedicated to single devices. Among them, linear module fixtures can only perform simple linear operations. For example, Chinese Patent Publication No. CN216421609U discloses a screw-fastening machine, including a worktable, a longitudinal module, and a transverse module. Each frame is equipped with two sets of transverse modules and several screwdrivers. The screwdrivers are located in the transverse modules, and the longitudinal and transverse modules are used to drive the screwdrivers to move longitudinally and transversely along the working area, respectively. Linear module fixtures can only perform simple assembly in 3C production lines. For complex assembly scenarios in the automotive industry, robotic fixtures are required. For example, Chinese Patent Publication No. CN222176650U discloses a robotic screw-fastening device, including a multi-axis robot. The head end of the robotic arm of the multi-axis robot is equipped with a screw-fastening mechanism. However, robotic fixtures are difficult to use for mass production. Different assembly scenarios require different assembly fixtures, and existing fixtures have limitations in single-device adaptability, low scenario reuse rate, insufficient production flexibility, and inability to quickly switch between standardized and complex assembly scenarios. Utility Model Content
[0003] To address the aforementioned issues, this invention proposes an integrated screw-locking fixture module applicable to automated screw-locking assembly scenarios. It is compatible with linear modules and assembly robots, enabling multiple scenarios with a single fixture and achieving precise screw-locking.
[0004] The integrated screw-locking fixture module of this utility model includes: Integrated motherboard The connecting plate includes a tooling base plate with support plates fixed on both sides. The support plates are fixed to the back of the integrated main board. The tooling base plate has an ISO flange hole adapted to the robot at its center and also includes a row of holes adapted to the linear module. The row of holes is opened on the support plate or on both sides of the ISO flange hole. The ISO flange hole can be used to fix it to the robot end effector, and the row of holes can be used to fix it to the linear module. The connecting plate enables quick docking of two devices. A screw-locking fixture includes a slide rail and a fixed base fixed to the front of an integrated motherboard; a cylinder is fixed on the fixed base, and a platform is slidably mounted on the slide rail; an electric screwdriver is fixed on the platform; the piston rod of the cylinder is fixed to the platform; a base is fixed to the bottom of the integrated motherboard; a suction nozzle is fixed on the base; the suction nozzle is positioned directly opposite the bit of the electric screwdriver; when the screw-locking fixture operates, the integrated motherboard is driven to a screw-feeding device by a linear module or robot, and the screw is received by the suction nozzle. Then, the integrated motherboard is driven to the screw-to-screw position by the linear module or robot. Next, the cylinder drives the piston rod to press the screw at the suction nozzle into the screw hole, and the electric screwdriver is turned on, thus achieving precise screw-locking into the screw hole position; The calibration unit includes an upper alignment device and a lower alignment device for mutual calibration; the upper alignment device is fixed on a base, and the lower alignment device is fixed on a calibration platform; the calibration platform is fixed to a screw feeding device or a screw fastening platform. This utility model's integrated screw-locking fixture module requires calibration after each mode switch between the robot and the linear module. This is because the connecting plate is disassembled and reinstalled, resulting in installation deviations. The robot or linear module drives the integrated motherboard to move and performs positioning between the upper and lower alignment devices. Once the upper and lower alignment devices are positioned, the coordinate information acquired by the robot or linear module is used as correction coordinates, while the initial positioning coordinates of the robot or linear module with the upper and lower alignment devices are used as initial coordinates. The correction coordinates are used to correct the initial coordinates, ensuring the screw-locking fixture is recalibrated to its original working path (screw suction, movement to the hole, and screw fastening are repeated). This guarantees the accuracy of screw fastening.
[0005] The integrated screw-locking fixture module of this invention can be applied to the end effector of linear modules or robots; specifically as follows: Linear module mode: The linear module is connected by a row of holes. The actuator (electric screwdriver, cylinder, nozzle) on the integrated motherboard moves linearly with the X / Y / Z axis of the linear module to fasten screws in batches (such as mobile phone motherboards, high-speed reciprocating at 0.5-1m / s). Robot mode: The ISO flange hole connects to the end effector of the robot, and the execution unit (electric screwdriver, cylinder, suction nozzle) on the integrated motherboard moves with the robot along 3-6 axes of multi-degree-of-freedom motion to complete complex spatial locking (such as curved surfaces and multiple angles).
[0006] Furthermore, the calibration unit also includes a laser ranging unit fixed on the calibration platform. After the horizontal coordinate calibration is completed, the ranging data is obtained through the laser ranging unit, and the original ranging data is corrected through the ranging data.
[0007] Furthermore, the upper alignment device includes multiple inverted countersunk holes on both sides of the platform, with threaded holes inside each countersunk hole. A calibration lens is fitted and fixed inside the countersunk hole, and a positioning blind hole is provided at the center of the top surface of the calibration lens. A threaded ring that abuts against the calibration lens is screwed into the threaded hole. The lower alignment device consists of multiple laser pointers fixed on the calibration platform and arranged facing the calibration lens. When the tooling position needs to be calibrated, the calibration mode is activated, the laser pointers are turned on, and the individual action ends of the robot or linear module are manually controlled to perform step control, so that the center point of the crosshair of each laser pointer can coincide with the positioning blind hole on a calibration lens. After calibration, the corrected coordinates are obtained.
[0008] Furthermore, the upper alignment device includes multiple laser emitters fixed on both sides of the base, and the lower alignment device is a laser target fixed on the calibration platform; the laser target is connected to a PLC that controls the movement of the robot or linear module; during operation, when the tooling position needs to be calibrated, the calibration mode is activated. At this time, the laser emitters are polled and turned on, the laser target acquires various laser coordinate information, the PLC obtains the corrected laser coordinate information, and uses the corrected laser coordinate information to correct the initially acquired laser coordinate information.
[0009] Furthermore, the support plate and the integrated main board are fitted together with a conical surface and then fastened with bolts. Both the support plate and the integrated main board are made of aluminum alloy.
[0010] Compared with existing technologies, the integrated screw fastening fixture module of this utility model is applied to automated screw fastening assembly scenarios. The connecting plate realizes the assembly of the linear module and the robot, which can meet the needs of multiple scenarios with one fixture. When the fixture module is first assembled with the linear module and the robot, the entire fastening path is debugged first. After the debugging is completed, the initial coordinates are obtained through the calibration unit. After the fixture module is disassembled and reassembled, the calibration unit performs a second calibration and corrects the initial coordinates, which can achieve precise screw fastening. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of the connecting plate with side openings and the screw fastening fixture of this utility model.
[0012] Figure 2 For the present utility model Figure 1 A magnified schematic diagram of the structure at point A in the middle.
[0013] Figure 3 This is a schematic diagram of the mounting structure of the fixed base and cylinder of this utility model.
[0014] Figure 4 This is a schematic diagram of the installation structure of the electric screwdriver, base, and nozzle of this utility model.
[0015] Figure 5 This is a schematic diagram of the installation structure of the connecting plate and screw fastening fixture with the front opening row of this utility model.
[0016] Figure 6 This is a schematic diagram of the integrated screw-locking tooling module structure of Embodiment 1 of this utility model.
[0017] Figure 7 This is a schematic diagram of the integrated screw-locking tooling module structure of Embodiment 2 of this utility model.
[0018] Reference numerals: 1. Integrated main board, 2. Tooling base plate, 3. Support plate, 4. ISO flange hole, 5. Hole row, 6. Slide rail, 7. Fixed base, 8. Cylinder, 9. Platform, 10. Electric screwdriver, 11. Base, 12. Nozzle, 13. Calibration platform, 14. Laser ranging unit, 15. Countersunk hole, 16. Calibration lens, 17. Positioning blind hole, 18. Threaded ring, 19. Laser pointer, 20. Laser emitter, 21. Laser target. Detailed Implementation
[0019] Example 1: like Figures 1 to 6 The integrated screw fastening fixture module shown includes: Integrated motherboard 1, The connecting plate includes a tooling base plate 2, with support plates 3 fixed on both sides of the tooling base plate 2. The support plates 3 are fixed to the back of the integrated main board 1. The tooling base plate 2 has an ISO flange hole 4 adapted to the robot at its center, and also includes a row of holes 5 adapted to the linear module. The row of holes 5 is opened on the support plate 3 or on both sides of the ISO flange hole 4. The ISO flange hole 4 can be used to fix it to the robot end effector, and the row of holes 5 can be used to fix it to the linear module. The connecting plate enables quick docking of two devices. A screw-locking fixture includes a slide rail 6 and a fixed base 7 fixed to the front of an integrated motherboard 1; a cylinder 8 is fixed on the fixed base 7, and a platform 9 is slidably arranged on the slide rail 6; an electric screwdriver 10 is fixed on the platform 9; the piston rod of the cylinder 8 is fixed to the platform 9; a base 11 is fixed to the bottom of the integrated motherboard 1; a suction nozzle 12 is fixed on the base 11; the suction nozzle 12 is positioned directly opposite the bit of the electric screwdriver 10; when the screw-locking fixture operates, the integrated motherboard 1 is driven to the screw feeding device by a linear module or robot, and the screw is received by the suction nozzle 12. Then, the integrated motherboard 1 is driven to the screw position by the linear module or robot, and then the cylinder 8 drives the piston rod to press the screw at the suction nozzle 12 into the screw hole, and the electric screwdriver 10 is turned on, so as to accurately lock the screw into the screw hole position; The calibration unit includes an upper alignment device and a lower alignment device for mutual calibration; the upper alignment device is fixed on the base 9, and the lower alignment device is fixed on the calibration platform 13; the calibration platform 13 is fixed to a screw feeding device or a screw locking platform. After each mode switch between the robot and the linear module, the integrated screw-locking fixture module of this utility model requires calibration due to installation deviations caused by the disassembly and reinstallation of the connecting plate. The robot or linear module drives the integrated motherboard 1 to move and performs positioning through the upper and lower alignment devices. Once the upper and lower alignment devices are positioned, the coordinate information obtained by the robot or linear module is used as the correction coordinates, while the initial positioning coordinates of the robot or linear module with the upper and lower alignment devices are used as the initial coordinates. The correction coordinates are used to correct the initial coordinates, thus recalibrating the screw-locking fixture to the original working path (screw suction, movement to the hole position, and screw fastening are repeated processes), ensuring the accuracy of screw fastening.
[0020] The integrated screw-locking fixture module of this invention can be applied to the end effector of linear modules or robots; specifically as follows: Linear module mode: The hole row 5 connects to the linear module, and the execution unit (electric screwdriver 10, cylinder 8, suction nozzle 12) on the integrated motherboard 1 moves linearly with the X / Y / Z axis of the linear module to fasten screws in batches (such as mobile phone motherboards, high-speed reciprocating at 0.5-1m / s). Robot mode: The end effector of the ISO flange hole 4-connected robot integrates the execution unit (electric screwdriver 10, cylinder 8, suction nozzle 12) on the main board 1, which moves with the robot along 3-6 axes of multiple degrees of freedom to complete complex spatial locking (such as curved surfaces and multiple angles).
[0021] The calibration unit also includes a laser ranging unit 14 fixed on the calibration platform 13. After the horizontal coordinate calibration is completed, the ranging data is obtained through the laser ranging unit 14, and the original ranging data is corrected through the ranging data.
[0022] The upper alignment device includes multiple inverted countersunk holes 15 on both sides of the base 9. A threaded hole is provided inside each countersunk hole 15, and a calibration lens 16 is fitted and fixed inside each countersunk hole 15. A positioning blind hole 17 is provided at the center of the top surface of the calibration lens 16. A threaded ring 18 is screwed into the threaded hole and abuts against the calibration lens 16. The lower alignment device consists of multiple laser pointers 19 fixed on the calibration platform 13 and arranged opposite the calibration lens 16. When the tooling position needs to be calibrated, the calibration mode is activated, the laser pointers 19 are turned on, and the individual action ends of the robot or linear module are manually controlled to perform step control, so that the center point of the crosshair of each laser pointer 19 can coincide with the positioning blind hole 17 on a calibration lens 16. After calibration, the sensors equipped on the robot or linear module obtain the corrected coordinates.
[0023] Example 2: like Figure 7 The integrated screw-locking fixture module shown includes an upper alignment device comprising multiple laser emitters 20 fixed to both sides of a base 9, and a lower alignment device comprising a laser target 21 fixed to a calibration platform 13. The laser target 21 is connected to a PLC that controls the movement of a robot or linear module. During operation, when the fixture position needs to be calibrated, the calibration button on the calibration platform 13 is turned on. At this time, the calibration mode is entered, the laser emitters 20 are polled and turned on, the laser target 21 acquires various laser coordinate information, the PLC obtains the corrected laser coordinate information, and uses the corrected laser coordinate information to correct the initially acquired laser coordinate information.
[0024] The support plate 3 and the integrated main board 1 are fitted together with a conical surface and then fastened with bolts. Both the support plate 3 and the integrated main board 1 are made of aluminum alloy.
[0025] The above embodiments are merely preferred embodiments of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model are included within the scope of the present utility model.
Claims
1. An integrated screw-locking fixture module, characterized in that: include: Integrated motherboard The connecting plate includes a tooling base plate, with support plates fixed on both sides of the tooling base plate, and the support plates are fixed to the back of the integrated main board; the tooling base plate has an ISO flange hole adapted to the robot at its center, and also includes a row of holes adapted to the linear module M5×10 bolts for installation; the row of holes is opened on the support plate or on both sides of the ISO flange hole. A screw-locking fixture includes a slide rail and a fixed base fixed to the front of an integrated motherboard; a cylinder is fixed on the fixed base, and a platform is slidably arranged on the slide rail; an electric screwdriver is fixed on the platform; the piston rod of the cylinder is fixed to the platform; a base is fixed to the bottom of the integrated motherboard; a suction nozzle is fixed on the base; and the suction nozzle is positioned directly opposite the bit of the electric screwdriver. The calibration unit includes an upper alignment device and a lower alignment device that calibrate each other; the upper alignment device is fixed on a base, and the lower alignment device is fixed on a calibration platform; the calibration platform is fixed to a screw feeding device or a screw locking platform.
2. The integrated screw fastening fixture module according to claim 1, characterized in that: The calibration unit also includes a laser ranging unit fixed on the calibration platform.
3. The integrated screw fastening fixture module according to claim 1, characterized in that: The upper alignment device includes multiple inverted countersunk holes on both sides of the platform. A threaded hole is provided inside the countersunk hole. A calibration lens is fitted and fixed inside the countersunk hole. A positioning blind hole is provided at the center of the top surface of the calibration lens. A threaded ring that abuts against the calibration lens is screwed into the threaded hole. The lower alignment device consists of multiple laser pointers fixed on the calibration platform and arranged facing the calibration lens.
4. The integrated screw fastening fixture module according to claim 1, characterized in that: The upper alignment device includes multiple laser emitters fixed on both sides of the base, and the lower alignment device is a laser target fixed on the calibration platform; the laser target is connected to a PLC that controls the movement of the robot or linear module.
5. The integrated screw fastening fixture module according to claim 1, characterized in that: The support plate and the integrated main board are fitted together with a conical surface and then fastened with bolts. Both the support plate and the integrated main board are made of aluminum alloy.