Welding fixing equipment for automobile auxiliary frame production

Abstract

The utility model relates to the technical field of welding fixing devices, in particular to welding fixing equipment for producing an automobile auxiliary frame, a fixed arm and a sliding arm are respectively provided with a turnover mechanism, and each turnover mechanism comprises a clamp, a first gear, a first clamping ring, a second clamping ring and a spring. The two clamps are rotationally installed at the top end of the fixed arm and the top end of the sliding arm respectively, the first gears are fixedly installed at the side ends of the clamps, the first clamping rings are fixedly installed at the side ends of the clamps, the two springs are slidably installed in the fixed arm and the sliding arm respectively, and a rack is slidably installed in the fixed arm. And an electric push cylinder is fixedly mounted on the fixed arm, and the electric push cylinder is started to push the rack to slide in the fixed arm, so that when the rack slides in the fixed arm, the first gear drives the auxiliary frame to rotate through the clamp, and the effect of improving the welding efficiency is achieved.

Description

Technical Field

[0001] This utility model relates to the field of welding and fixing device technology, and in particular to a welding and fixing device for the production of automobile subframes. Background Technology

[0002] In the automotive manufacturing industry, the subframe, as a crucial component of the vehicle chassis, directly impacts the overall performance and safety of the vehicle through its production quality and precision. With the continuous development of the automotive industry, the production processes and quality requirements for subframes are increasingly stringent. Welding is one of the key processes in automotive subframe production, and ensuring the stable fixation of the subframe during welding is a vital prerequisite for guaranteeing welding quality and precision. In practical applications, the welding of automotive subframes typically requires the following techniques:

[0003] 1. Positioning mechanism: Employs high-precision sensors and positioning systems to ensure accurate positioning of the subframe before welding;

[0004] 2. Powerful clamping mechanisms, such as high-performance hydraulic or pneumatic clamps, provide sufficient clamping force to resist various forces during the welding process;

[0005] 3. The flexible adjustment mechanism can adapt to different models and sizes of subframes, enabling quick replacement and adjustment.

[0006] An existing Chinese patent, CN219310542U, describes a welding fixture for an automotive subframe assembly. The fixture includes a main body comprising a base, a turntable, a rotating device, a worktable, a moving device, and a clamping device. The turntable is located at the top of the base, the rotating device is located at the bottom of the turntable, and the worktable is located at the top of the turntable. One end of the worktable is connected to the moving device, and the clamping device is located at the top of the worktable. The clamping device includes a fixed rod, a clamping plate, a hydraulic cylinder, a hydraulic rod, and fasteners. One end of the fixed rod is fixedly connected to the clamping plate, which is C-shaped. The top of the clamping plate is equipped with a hydraulic cylinder. This automotive subframe assembly welding fixture, firstly, allows for control and adjustment of the distance between clamps based on the width of the subframe through the moving device, and secondly, the clamping device ensures uniform and stable clamping force on the automotive subframe, thereby improving welding efficiency and precision.

[0007] However, during the implementation of the above technical solution, at least the following technical problems were found: The above welding and fixing device uses a hydraulic cylinder to push the clamping plate to hold the frame. When one side of the frame is welded, if the other side needs to be welded, the frame needs to be removed, flipped over, and clamped again before the welding operation on the back side can be performed. This is cumbersome to use and has low welding efficiency. Utility Model Content

[0008] (a) Technical problems to be solved

[0009] To address the shortcomings of existing technologies, this utility model provides a welding and fixing device for the production of automotive subframes, solving the problems of the aforementioned welding and fixing devices. These devices use hydraulic cylinders to push clamps to hold the frame, and when welding one side of the frame is completed, the frame needs to be removed, flipped over, and clamped again before welding can be performed on the other side. This makes the process cumbersome and results in low welding efficiency.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, this utility model provides the following technical solution:

[0012] A welding and fixing device for automobile subframe production includes a welding base, a fixed arm fixedly mounted on the welding base, and a sliding arm slidably mounted on the welding base. Both the fixed arm and the sliding arm are equipped with a flipping mechanism. The flipping mechanism includes clamps, a first gear, a first retaining ring, a second retaining ring, and springs. Two clamps are rotatably mounted on the top ends of the fixed arm and the sliding arm, respectively. The first gear and the first retaining ring are fixedly mounted on the side ends of the clamps. Two springs are slidably mounted inside the fixed arm and the sliding arm, respectively. A rack is slidably mounted inside the fixed arm. An electric push cylinder is fixedly mounted on the fixed arm. A rotary encoder is fixedly mounted inside the sliding arm. A second gear is fixedly mounted at the end of the rotary encoder's shaft. The telescopic rod of the electric push cylinder is fixedly connected to the rack. The first retaining ring contacts the second retaining ring. The rack meshes with the first gear inside the fixed arm, and the second gear meshes with the first gear inside the sliding arm. A threaded rod is fixedly mounted inside the welding base. A threaded sleeve is rotatably mounted at the bottom end of the sliding arm. The threaded sleeve is threadedly connected to the threaded rod, and a gear ring is fixedly mounted on the side end of the threaded sleeve.

[0013] Preferably, a stepper motor is fixedly installed inside the sliding arm.

[0014] Preferably, a third gear is fixedly mounted on the shaft of the stepper motor; the third gear meshes with a gear ring.

[0015] (III) Beneficial Effects

[0016] 1. During use, the stepper motor starts and drives the third gear to rotate. Since the third gear meshes with the gear ring, the rotation of the third gear will drive the gear ring to rotate, which in turn will drive the threaded sleeve to rotate. Since the threaded sleeve is threadedly connected to the threaded rod, the rotation of the threaded sleeve will drive the sliding arm to slide along the threaded rod. Since the diameter of the third gear is half that of the gear ring, the gear ring can only rotate half a turn for every one revolution of the third gear. This allows the stepper motor to more precisely control the position of the threaded sleeve. Furthermore, the third gear driving the gear ring increases the torque, enabling the threaded sleeve to smoothly drive the sliding arm to move, thus improving the accuracy of the sliding arm's movement.

[0017] 2. After one side of the welding is completed, the electric pusher cylinder is activated to push the rack to slide inside the fixed arm. Since the rack meshes with the first gear inside the fixed arm, the first gear inside the fixed arm will rotate when the rack slides inside the fixed arm. Since the first gear is fixedly connected to the clamp, the first gear will drive the subframe to rotate through the clamp. When the subframe rotates 180 degrees, the electric pusher cylinder stops, and the back of the subframe can be welded. Since the first gear inside the sliding arm meshes with the second gear, the second gear will drive the rotary encoder shaft to rotate. The rotary encoder can obtain rotation data, determine the rotation angle of the subframe, and transmit the data to the PLC control system through wires. The electric pusher cylinder pushes the rack to slide, thereby driving the clamp to rotate and automatically flip the subframe, achieving the effect of improving welding efficiency. Attached Figure Description

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a structural diagram of the welding base of this utility model;

[0020] Figure 2 This is a side cross-sectional view of the fixed arm of this utility model;

[0021] Figure 3 This is a front cross-sectional view of the fixed arm of this utility model;

[0022] Figure 4 This is a structural diagram of the retaining ring of this utility model;

[0023] Figure 5 This is a cross-sectional view of the top end of the sliding arm of this utility model;

[0024] Figure 6 This is a cross-sectional view of the bottom end of the sliding arm of this utility model.

[0025] Legend: 1. Welded base; 2. Fixed arm; 3. Sliding arm; 4. Threaded rod; 5. Clamp; 6. First gear; 7. First retaining ring; 8. Second retaining ring; 9. Spring; 11. Rack; 12. Electric push cylinder; 13. Second gear; 14. Threaded sleeve; 15. Gear ring; 16. Stepper motor; 17. Third gear; 18. Rotary encoder. Detailed Implementation

[0026] This application provides a welding and fixing device for automotive subframe production, effectively solving the problems of the aforementioned welding and fixing devices. These devices use hydraulic cylinders to push clamps to hold the frame, and when welding one side of the frame is completed, welding the other side requires removing the frame, flipping it over, and clamping it again before welding can be performed. This is cumbersome and inefficient. In this new device, a stepper motor starts and drives a third gear to rotate. Since the third gear meshes with a gear ring, its rotation drives the gear ring to rotate, which in turn drives a threaded sleeve to rotate. Because the threaded sleeve is threaded to a threaded rod, its rotation causes a sliding arm to slide along the threaded rod. Since the diameter of the third gear is half that of the gear ring, the gear ring can only rotate half a turn per revolution of the third gear. This allows the stepper motor to more precisely control the position of the threaded sleeve, and the third gear driving the gear ring increases the torque. This design allows the threaded sleeve to smoothly drive the sliding arm, improving the accuracy of the sliding arm's movement. After one side is welded, the electric push cylinder activates, pushing the rack to slide inside the fixed arm. Since the rack meshes with the first gear inside the fixed arm, the first gear inside the fixed arm will rotate as the rack slides. Because the first gear is fixedly connected to the clamp, it will drive the subframe to rotate through the clamp. When the subframe rotates 180 degrees, the electric push cylinder stops, allowing welding to proceed on the back of the subframe. Since the first gear inside the sliding arm meshes with the second gear, the second gear will drive the rotary encoder shaft to rotate. The rotary encoder can then obtain rotation data, determine the rotation angle of the subframe, and transmit the data to the PLC control system via wires. The electric push cylinder then pushes the rack to slide, thereby driving the clamp to rotate and automatically flip the subframe, improving welding efficiency.

[0027] Example

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the technical solution in this application embodiment effectively solves the problem of the aforementioned welding fixing device. The device uses a hydraulic cylinder to push the clamping plate to hold the frame. When welding one side of the frame is completed, welding the other side requires removing the frame, flipping it over, and clamping it again before welding can be performed on the back side. This is cumbersome and inefficient. The overall approach is as follows:

[0029] To address the problems existing in the prior art, this utility model provides a welding and fixing device for the production of automotive subframes, including a welding base 1, a fixed arm 2 fixedly mounted on the welding base 1, and a sliding arm 3 slidably mounted on the welding base 1. Both the fixed arm 2 and the sliding arm 3 are equipped with a flipping mechanism. The flipping mechanism includes a clamp 5, a first gear 6, a first retaining ring 7, a second retaining ring 8, and a spring 9. The two clamps 5 are rotatably mounted on the top ends of the fixed arm 2 and the sliding arm 3, respectively. The first gear 6 is fixedly mounted on the side end of the clamp 5, and the first retaining ring 7 is fixedly mounted on the side end of the clamp 5.

[0030] Two springs 9 are slidably installed inside the fixed arm 2 and the sliding arm 3 respectively. A rack 11 is slidably installed inside the fixed arm 2. An electric push cylinder 12 is fixedly installed on the fixed arm 2. A rotary encoder 18 is fixedly installed inside the sliding arm 3. A second gear 13 is fixedly installed at the end of the rotating shaft of the rotary encoder 18. The telescopic rod of the electric push cylinder 12 is fixedly connected to the rack 11. The first retaining ring 7 is in contact with the second retaining ring 8. The rack 11 meshes with the first gear 6 inside the fixed arm 2.

[0031] The second gear 13 meshes with the first gear 6 inside the sliding arm 3. A threaded rod 4 is fixedly installed inside the welded base 1. A threaded sleeve 14 is rotatably installed at the bottom end of the sliding arm 3. The threaded sleeve 14 is threadedly connected to the threaded rod 4. A gear ring 15 is fixedly installed on the side end of the threaded sleeve 14. A stepper motor 16 is fixedly installed inside the sliding arm 3. A third gear 17 is fixedly installed on the shaft of the stepper motor 16. The third gear 17 meshes with the gear ring 15.

[0032] Working principle:

[0033] The first step, during installation, is to connect the electric push cylinder 12, stepper motor 16, and rotary encoder 18 to the PLC control system via wires. During operation, the stepper motor 16 starts, driving the third gear 17 to rotate. Since the third gear 17 meshes with the gear ring 15, its rotation will drive the gear ring 15 to rotate, which in turn will drive the threaded sleeve 14 to rotate. Because the threaded sleeve 14 is threadedly connected to the threaded rod 4, its rotation will cause the sliding arm 3 to slide along the threaded rod 4 until the distance between the two clamps 5 matches the subframe to be welded. During this process, because the diameter of the third gear 17 is... The gear ring 15 rotates halfway, so the gear ring 15 can only rotate half a turn when the third gear 17 rotates. This allows the stepper motor 16 to more precisely control the position of the threaded sleeve 14. Furthermore, the third gear 17 driving the gear ring 15 increases the torque, enabling the threaded sleeve 14 to smoothly drive the sliding arm 3 to move. When the third gear 17 rotates counterclockwise, the gear ring 15 will rotate clockwise, causing the sliding arm 3 to move closer to the fixed arm 2. When the third gear 17 rotates clockwise, the gear ring 15 will rotate counterclockwise, causing the sliding arm 3 to move away from the fixed arm 2. Once the sliding arm 3 is in place, the cylinder on the clamp 5 is activated, pushing the internal clamping plate to clamp the subframe.

[0034] The second step involves welding after the clamp 5 holds the subframe. Once one side is welded, the electric push cylinder 12 activates to push the rack 11 to slide inside the fixed arm 2. Since the rack 11 meshes with the first gear 6 inside the fixed arm 2, the first gear 6 inside the fixed arm 2 will rotate as the rack 11 slides. Because the first gear 6 is fixedly connected to the clamp 5, it will drive the subframe to rotate via the clamp 5. The electric push cylinder 12 stops when the subframe has rotated 180 degrees, allowing welding to proceed on the back of the subframe. If welding at specific angles is required, the electric push cylinder 12 can also rotate the subframe to other angles. During this process, the rotation of the subframe will also drive the clamp 5 on the sliding arm 3 to rotate, thereby driving the first gear 6 inside the sliding arm 3 to rotate. When wheel 6 rotates, the first gear 6 inside the sliding arm 3 meshes with the second gear 13, causing the second gear 13 to drive the shaft of the rotary encoder 18 to rotate. The rotary encoder 18 can then obtain rotation data, determine the rotation angle of the subframe, and transmit the data to the PLC control system via wires. During the rotation of clamp 5, clamp 5 will drive the first retaining ring 7 to rotate. The first retaining ring 7 will apply pressure to the second retaining ring 8 through the inclined surface at its side end, causing the second retaining ring 8 to slide inward against the elastic force of spring 9, allowing the first retaining ring 7 to rotate smoothly. When clamp 5 stops rotating, the second retaining ring 8 will reset and lock the first retaining ring 7 under the elastic force of spring 9. When clamp 5 is not clamping the subframe, it can prevent the clamp 5 on the sliding arm 3 from rotating due to gravity, thus preventing the clamp 5 on the sliding arm 3 from failing to align with the clamp 5 on the fixed arm 2.

[0035] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A welding and fixing device for the production of automotive subframes, comprising a welding base (1), a fixing arm (2) fixedly mounted on the welding base (1), and a sliding arm (3) slidably mounted on the welding base (1), characterized in that, A flipping mechanism is installed on both the fixed arm (2) and the sliding arm (3). The flipping mechanism includes a clamp (5), a first gear (6), a first retaining ring (7), a second retaining ring (8), and a spring (9). The two clamps (5) are rotatably installed on the top ends of the fixed arm (2) and the sliding arm (3), respectively. The first gear (6) is fixedly installed on the side end of the clamp (5). The first retaining ring (7) is fixedly installed on the side end of the clamp (5). The two springs (9) are slidably installed inside the fixed arm (2) and the sliding arm (3), respectively. A rack (11) is slidably installed inside the fixed arm (2). An electric push cylinder (12) is fixedly installed on the fixed arm (2). A rotary encoder (18) is fixedly installed inside the sliding arm (3). A second gear (13) is fixedly installed at the end of the rotating shaft of the rotary encoder (18). Among them, the telescopic rod of the electric push cylinder (12) is fixedly connected to the rack (11), the first retaining ring (7) is in contact with the second retaining ring (8), the rack (11) meshes with the first gear (6) in the fixed arm (2), and the second gear (13) meshes with the first gear (6) in the sliding arm (3).

2. The welding and fixing equipment for automobile subframe production as described in claim 1, characterized in that, A threaded rod (4) is fixedly installed inside the welding base (1).

3. The welding and fixing equipment for automobile subframe production as described in claim 1, characterized in that, The bottom end of the sliding arm (3) is rotatably fitted with a threaded sleeve (14); Among them, the threaded sleeve (14) is threadedly connected to the threaded rod (4).

4. The welding and fixing equipment for automobile subframe production as described in claim 3, characterized in that, A gear ring (15) is fixedly installed on the side end of the threaded sleeve (14).

5. The welding and fixing equipment for automobile subframe production as described in claim 1, characterized in that, A stepper motor (16) is fixedly installed inside the sliding arm (3).

6. The welding and fixing equipment for automobile subframe production as described in claim 5, characterized in that, A third gear (17) is fixedly mounted on the shaft of the stepper motor (16); Among them, the third gear (17) meshes with the gear ring (15).

Images