An automatic screwing machine for positioning and stabilizing workpieces

Abstract

The utility model discloses an automatic screwing machine of positioning work piece stable, including frame and the work piece bearing platform of being located frame top, and located work piece bearing platform top's automatic screwing machine unit, work piece bearing platform is provided with at least two independent lifting's self -adaptation support subassembly, and self -adaptation support subassembly is used for lifting and leveling work piece from below, still be provided with at least one lateral flexible locking mechanism on the frame, and lateral flexible locking mechanism is used for locking work piece from lateral. The utility model self -adaptation support subassembly independent lifting according to work piece lower surface shape, lift work piece and make work piece upper surface leveling, and lateral flexible locking mechanism promotes the profiling clamp jaw contact work piece side surface from lateral, realizes flexible locking, thereby keeps work piece stable in the process of screwing, and drive part drives support plunger to lift, and pressure sensor monitors the support force in real time, and stops lifting when detecting predetermined pressure, and ensures that each support point force is even.

Description

Technical Field

[0001] This utility model relates to the field of screw driving machine technology, and in particular to an automatic screw driving machine that stably positions the workpiece. Background Technology

[0002] In existing automatic screw-driving machines, workpieces are typically placed on a fixed support platform. However, this platform often cannot accommodate the unevenness or shape errors of the workpiece, leading to unstable placement. Furthermore, traditional locking mechanisms often employ rigid clamping, locking the workpiece from a single direction. This fails to effectively compensate for changes in the workpiece's shape, easily causing workpiece displacement, tilting, or vibration during the screw-driving process. This affects the accuracy and efficiency of screw-driving, and may even result in misaligned screws or workpiece damage. Summary of the Invention

[0003] To overcome the technical defects of the existing technology, this utility model provides an automatic screw-driving machine that stabilizes the positioning of the workpiece.

[0004] The technical solution adopted by this utility model is: an automatic screw-driving machine for stabilizing the positioning of workpieces, including a frame and a workpiece support platform at the top of the frame, and an automatic screw-driving unit located above the workpiece support platform. The workpiece support platform is provided with at least two independently liftable adaptive support components, which are used to lift and level the workpiece from below. The frame is also provided with at least one lateral flexible locking mechanism, which is used to lock the workpiece from the side.

[0005] Preferably, the adaptive support assembly includes a support plunger, a drive component for driving the support plunger to move up and down, and a pressure sensor for detecting the force state of the support plunger.

[0006] Preferably, the driving component is a first electric push rod, the cylinder of the driving component is fixedly installed below the workpiece support platform, and the output end of the driving component is connected to the bottom end of the support plunger; the pressure sensor is disposed between the output end of the driving component and the support plunger.

[0007] Preferably, the lateral flexible locking mechanism includes a locking arm, a linear drive for driving the locking arm forward and backward, a universal compliant joint disposed at the end of the locking arm, and a contour gripper disposed at the end of the universal compliant joint.

[0008] Preferably, the linear drive is a second electric push rod, the cylinder of the linear drive is fixedly mounted on the frame, the output end of the linear drive is connected to one end of the locking arm, the fixed end of the universal compliant joint is connected to the other end of the locking arm, and the movable end of the universal compliant joint is connected to the contour gripper.

[0009] Preferably, the universal compliant joint is a ball joint or a cross-shaped universal joint.

[0010] Preferably, the contouring gripper is a V-shaped block, and the material of the contouring gripper is engineering plastic or rubber.

[0011] The beneficial effects of this utility model are: 1. The adaptive support component lifts and lowers independently according to the shape of the lower surface of the workpiece, lifts the workpiece and levels the upper surface of the workpiece, and the lateral flexible locking mechanism pushes the contour gripper from the side to contact the side surface of the workpiece to achieve flexible locking, thereby keeping the workpiece stable during the screwing process, thus improving the accuracy and efficiency of screwing. 2. The drive component drives the support plunger to rise and fall, and the pressure sensor monitors the support force in real time. When the predetermined pressure is detected, the rising and falling stops to ensure that each support point is subjected to uniform force. 3. The linear drive pushes the locking arm forward, and the universal compliant joint allows the contour gripper to rotate in multiple directions, adapting to the shape of the workpiece side surface and achieving uniform locking; 4. The contour grippers are made of engineering plastics or rubber, providing soft contact to avoid damage to the workpiece surface while increasing friction. Attached Figure Description

[0012] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the lateral flexible locking mechanism of this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. Frame; 2. Workpiece support platform; 3. Automatic screw-driving unit; 4. Adaptive support assembly; 5. Lateral flexible locking mechanism; 6. Support plunger; 7. Drive component; 8. Pressure sensor; 9. Locking arm; 10. Linear drive component; 11. Universal flexible joint; 12. Contouring gripper. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0016] like Figure 1 and Figure 2 As shown, this embodiment provides an automatic screw-driving machine for stabilizing workpiece positioning, including a frame 1 and a workpiece support platform 2 located at the top of the frame 1, and an automatic screw-driving unit 3 located above the workpiece support platform 2 (the automatic screw-driving unit 3 adopts an automatic screw-driving machine such as the one with application number CN201210426066.8). A PLC controller is installed on the frame 1. At least two independently adjustable adaptive support components 4 are provided on the workpiece support platform 2. The adaptive support components 4 are used to lift and level the workpiece from below. At least one lateral flexible locking mechanism 5 is also provided on the frame 1. The lateral flexible locking mechanism 5 is used to lock the workpiece from the side. When screwing the workpiece, the workpiece is placed on the workpiece support platform 2. The adaptive support components 4 lift and lower independently according to the shape of the lower surface of the workpiece, lift the workpiece and level the upper surface of the workpiece. The lateral flexible locking mechanism 5 pushes the contour gripper 12 from the side to contact the side surface of the workpiece to achieve flexible locking, thereby keeping the workpiece stable during the screw-driving process.

[0017] The adaptive support assembly 4 includes a support plunger 6, a drive component 7 for driving the support plunger 6 to rise and fall, and a pressure sensor 8 for detecting the force state of the support plunger 6. In the adaptive support assembly 4, the drive component 7 drives the support plunger 6 to rise and fall, and the pressure sensor 8 monitors the support force in real time. When a predetermined pressure is detected, the rising and falling stops to ensure that each support point is subjected to uniform force.

[0018] The driving component 7 is a first electric push rod. The cylinder of the driving component 7 is fixedly installed below the workpiece support platform 2. The output end of the driving component 7 is connected to the bottom end of the support plunger 6. The pressure sensor 8 is set between the output end of the driving component 7 and the support plunger 6. The first electric push rod, as the driving component 7, provides precise linear motion. The pressure sensor 8 directly measures the force on the support plunger 6 to achieve closed-loop control and improve leveling accuracy.

[0019] The lateral flexible locking mechanism 5 includes a locking arm 9, a linear drive 10 for driving the locking arm 9 forward and backward, a universal compliant joint 11 disposed at the end of the locking arm 9, and a contour gripper 12 disposed at the end of the universal compliant joint 11. The linear drive 10 pushes the locking arm 9 forward, and the universal compliant joint 11 allows the contour gripper 12 to rotate in multiple directions, adapting to the shape of the workpiece side surface and achieving uniform locking.

[0020] The linear drive 10 is a second electric push rod. The cylinder of the linear drive 10 is fixedly mounted on the frame 1. The output end of the linear drive 10 is connected to one end of the locking arm 9. The fixed end of the universal compliant joint 11 is connected to the other end of the locking arm 9. The movable end of the universal compliant joint 11 is connected to the contour gripper 12. The linear drive 10 pushes the locking arm 9 to move forward and backward in a straight line. The universal compliant joint 11 compensates for the unevenness of the workpiece side surface and ensures that the contour gripper 12 fits the workpiece.

[0021] The universal compliant joint 11 is a ball joint or a cross shaft universal joint, providing multi-degree-of-freedom rotation, so that the contour gripper 12 can flexibly adapt to the tilt or curvature changes of the workpiece side surface.

[0022] The contouring gripper 12 is a V-shaped block that can effectively clamp cylindrical or regular workpieces. The material of the contouring gripper 12 is engineering plastic or rubber, which provides soft contact, avoids damage to the workpiece surface, and increases friction.

[0023] During operation, after the operator moves the workpiece onto the workpiece support platform 2, the drive components 7 of at least two adaptive support components 4 rise synchronously, driving the support plunger 6 to move upward to contact and lift the lower surface of the workpiece. The pressure sensor 8 installed between the support plunger 6 and the drive component 7 monitors the force status in real time. The PLC controller receives the signals from each pressure sensor 8 and independently controls the lifting and lowering of each drive component 7. When the pressure of a certain support point reaches the preset threshold, it indicates that the point has made stable contact with the workpiece, and the corresponding drive component 7 stops moving. Other support points continue to rise until all reach the preset pressure. Multiple adaptive support components 4 can work together to automatically compensate for the shape error of the bottom surface of the workpiece, and finally adjust the workpiece to a horizontal or predetermined posture. After the workpiece is leveled by the lower support assembly, the lateral flexible locking mechanism 5 starts to operate. The linear drive 10 (second electric push rod) pushes the locking arm 9 to move to the side of the workpiece. The universal compliant joint 11 (such as a ball joint) installed at the end of the locking arm 9 allows the contour gripper 12 to deflect and swing in multiple directions. This allows the contour gripper 12 to adaptively conform to the side surface of the workpiece even if the side of the workpiece is not perpendicular to the locking direction or has a curved surface. This is achieved by the slight deformation provided by its material (engineering plastic or rubber) and the rotation of the universal compliant joint 11. When all the contour grippers 12 of the lateral flexible locking mechanism 5 are in good contact with the side surface of the workpiece and a stable preload is applied, the workpiece is fully constrained: the lower part is provided with stable support and leveling by the adaptive support assembly 4, and the side is provided with inclusive clamping force by the flexible locking mechanism 5 to prevent horizontal movement and rotation. In this state, the automatic screw fastening unit 3 located above the workpiece starts to work and performs precise and efficient screw fastening operations. Throughout the entire locking process, the workpiece remains stable, effectively preventing displacement or tilting caused by vibration or force, thus ensuring processing quality.

[0024] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0025] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An automatic screw-driving machine for stabilizing workpiece positioning, comprising a frame (1) and a workpiece support platform (2) disposed at the top of the frame (1), and an automatic screw-driving unit (3) located above the workpiece support platform (2), characterized in that: The workpiece support platform (2) is provided with at least two independently liftable adaptive support components (4), which are used to lift and level the workpiece from below. The frame (1) is also provided with at least one lateral flexible locking mechanism (5), which is used to lock the workpiece from the side.

2. The automatic screw-driving machine for stabilizing workpiece positioning according to claim 1, characterized in that: The adaptive support assembly (4) includes a support plunger (6), a drive component (7) for driving the support plunger (6) to rise and fall, and a pressure sensor (8) for detecting the force state of the support plunger (6).

3. The automatic screw-driving machine for stabilizing workpiece positioning according to claim 2, characterized in that: The driving component (7) is a first electric push rod. The cylinder of the driving component (7) is fixedly installed below the workpiece support platform (2). The output end of the driving component (7) is connected to the bottom end of the support plunger (6). The pressure sensor (8) is located between the output end of the driving component (7) and the support plunger (6).

4. The automatic screw-driving machine for stabilizing workpiece positioning according to claim 1, characterized in that: The lateral flexible locking mechanism (5) includes a locking arm (9), a linear drive (10) for driving the locking arm (9) to move forward and backward, a universal compliant joint (11) disposed at the end of the locking arm (9), and a contour gripper (12) disposed at the end of the universal compliant joint (11).

5. An automatic screw-driving machine for stabilizing workpiece positioning according to claim 4, characterized in that: The linear drive (10) is a second electric push rod. The cylinder of the linear drive (10) is fixedly installed on the frame (1). The output end of the linear drive (10) is connected to one end of the locking arm (9). The fixed end of the universal compliant joint (11) is connected to the other end of the locking arm (9). The movable end of the universal compliant joint (11) is connected to the contour gripper (12).

6. The automatic screw-driving machine for stabilizing workpiece positioning according to claim 4, characterized in that: The universal flexible joint (11) is a ball joint or a cross shaft universal joint.

7. The automatic screw-driving machine for stabilizing workpiece positioning according to claim 4, characterized in that: The contour gripper (12) is a V-shaped block, and the material of the contour gripper (12) is engineering plastic or rubber.

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