Automatic feeding device of rim welding machine

Abstract

The invention relates to the technical field of machining, in particular to a rim welding machine automatic feeding device which comprises a rim forming mechanism, a butt welding mechanism arranged on the opposite face of the rim forming mechanism, and an automatic feeding mechanism arranged between the rim forming mechanism and the butt welding mechanism and comprising a fixed seat, a base, a first moving part, a second moving part and a clamp. The fixing seat is fixedly arranged on the upper side of the rim forming mechanism, the base is fixedly arranged on the upper side of the fixing seat, the first moving part is arranged on the upper side of the base, the second moving part is slidably hung at the bottom end of the lifting seat, the sliding direction of the second moving part is parallel to the connecting rod, and the clamp is fixedly hung at one end of the second moving part. The problems that in the prior art, manual work is relied on, and the workpiece conveying position is not accurate are solved.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to an automatic feeding device for a wheel rim welding machine. Background Technology

[0002] The wheel rim production line is used for wheel manufacturing and consists of several key pieces of equipment, including a wheel rim forming machine, a butt welding machine, a weld seam treatment unit, a flaring machine, a roll forming machine, an expansion machine, and a flattening and punching machine. Currently, most of the equipment in domestic truck wheel rim production lines has been automated, but the feeding of the butt welding machine is still done manually.

[0003] Butt welding machines require extremely high precision in feeding materials, but the consistency of wheel rims is poor. In a conventional wheel rim production line, the wheel rim moves freely from the rim rounding machine to the butt welding machine, and misalignment in various directions can occur, requiring manual correction. Therefore, it is difficult to feed materials into butt welding machines without manual intervention.

[0004] Chinese Patent Publication No. CN103659375A discloses a movable clamp, comprising: a base, a guide rail on the upper part of the base, a clamp body that can move along the guide rail, a positioning hole on the clamp body, a screw on the side of the positioning hole, an upper clamping sleeve and a lower clamping sleeve on the outside of the screw, the lower clamping sleeve having an inclined surface at its end, and both the side of the upper clamping sleeve and the inclined surface of the lower clamping sleeve can abut against the workpiece.

[0005] It is evident that this invention has a small range of movement and low precision in the feeding process. Summary of the Invention

[0006] Therefore, the present invention provides an automatic feeding device for a wheel rim welding machine to overcome the problem of inaccurate workpiece positioning in the prior art.

[0007] To achieve the above objectives, the present invention provides an automatic feeding device for a wheel rim welding machine, comprising: A rim forming mechanism, comprising a circling machine for bending sheet metal into a ring and a flattening machine located at the output end of the circling machine for flattening the opening of the ring workpiece. A welding mechanism is provided on the opposite side of the rim forming mechanism for welding the opening of the flattened annular workpiece. An automatic feeding mechanism is disposed between the rim forming mechanism and the welding mechanism, and includes a fixed seat, a base, a first moving part, a second moving part, and a clamp; The fixed seat is fixedly installed on the upper side of the rim forming mechanism, the base is fixedly installed on the upper side of the fixed seat, the first moving part is installed on the upper side of the base, the first moving part includes a lifting motor fixedly installed on one side of the base, an active lifting shaft installed at the output end of the lifting motor, a first cam installed on the active lifting shaft, the working surface of the first cam abutting against the lifting seat, the first cam rotating to drive the lifting seat to rise and fall, an active rotating shaft installed on the active lifting shaft, a connecting rod installed at one end of the active rotating shaft away from the active lifting shaft, the other end of the connecting rod connected to the driven rotating shaft, the driven rotating shaft fixedly installed on the driven lifting shaft, a second cam installed on the driven lifting shaft, the working surface of the second cam abutting against the lifting seat, the second cam used to synchronously drive the lifting seat to rise and fall, a number of vertical linear guide rails are also installed between the lifting seat and the base, the second moving part is slidably suspended at the bottom end of the lifting seat, the sliding direction of the second moving part is parallel to the connecting rod, and the clamp is fixedly suspended at one end of the second moving part.

[0008] Furthermore, the second moving part includes: a horizontal moving base, a horizontal moving servo motor, a synchronous pulley, a synchronous belt, and a horizontal moving linear guide; The horizontal linear guide rail is slidably suspended at the bottom of the lifting seat, and the synchronous pulleys are fixedly suspended at both ends of the lower side of the lifting seat. A synchronous belt is installed on the synchronous pulleys, and the horizontal servo motor is connected to the synchronous pulleys to provide power. The synchronous belt is driven to move horizontally through the synchronous pulleys. A pressure plate is provided on the synchronous belt, and the pressure plate is fixedly connected to the horizontal moving seat.

[0009] Furthermore, the clamp includes: a left clamp, a right clamp, and a clamp closing mechanism; The left clamp and the right clamp have the same structure and are arranged opposite each other on both sides of one end of the horizontal moving seat. The clamp closing mechanism is inside the left clamp and the right clamp and is used to control the opening and closing of the clamp.

[0010] Furthermore, the left clamp includes: The clamping arm has the clamping closing structure installed inside it, and the workpiece is clamped by moving relatively closer together through the clamping closing structure; The gripper has a groove to support the bottom plane of the workpiece, and anti-slip texture is provided on the surface of the workpiece gripping side to make the gripping of the workpiece more stable.

[0011] Furthermore, the clamp closing structure includes a closing cylinder, a piston rod, a rotating shaft, and a connecting rod; The piston rod of the closing cylinder is connected to the inner connecting rod via a rotating shaft. When the piston rod extends, the gripper moves horizontally closer to the piston rod. When the piston rod retracts, the gripper moves horizontally apart from the piston rod.

[0012] Furthermore, the clamp protection mechanism includes a slag-blocking plate, a slag-blocking plate fixing seat, a cylinder, a guide shaft, and a guide sleeve; The slag baffle fixing seat is fixedly installed on the upper side of one end of the base, the slag baffle is installed on the outer side of the slag baffle fixing seat, a cylinder is fixedly installed at the center position of the upper side of the slag baffle, guide shafts are fixedly installed on both sides of the cylinder, and guide sleeves are provided on the outer side of the guide shafts.

[0013] Furthermore, the automatic feeding mechanism also includes a control module, which performs a precision correction test before the automatic feeding mechanism is started to obtain displacement deviation characteristic values. The control module controls the fixture to pick up the workpiece, and the automatic feeding mechanism moves from the initial position to the test position at a preset speed, recording the first displacement deviation; the automatic feeding mechanism returns from the test position to the initial position at a preset speed, recording the second displacement deviation; the characteristic value of the displacement deviation is determined by the first displacement deviation and the second displacement deviation.

[0014] Furthermore, the feeding accuracy meets the preset standard in response to the displacement deviation characteristic value being less than the preset deviation value, and does not meet the preset standard in response to the displacement deviation characteristic value being greater than or equal to the preset deviation value.

[0015] Furthermore, in response to the feeding accuracy not meeting the preset standard, the preset speed of the automatic feeding mechanism is reduced.

[0016] Furthermore, the reduction in the preset speed is positively correlated with the displacement deviation characteristic value and the preset deviation value.

[0017] Compared with the prior art, the beneficial effects of the present invention are that it replaces manual labor, realizes automatic feeding of welding machines, and achieves higher efficiency and better product quality.

[0018] Furthermore, the lifting motion of the fixture utilizes a combination of cam and linkage mechanisms to ensure the vertical lifting of the workpiece and the motion mechanism, laying an important foundation for high-quality welding of the welding machine.

[0019] Furthermore, the cam structure ensures backlash-free lifting motion, and the synchronous belt drive guarantees low vibration and low displacement deviation during horizontal movement; the dual-degree-of-freedom motion enables the fixture to quickly complete the entire process of workpiece gripping, moving, and placing, significantly improving efficiency compared to traditional single-axis mechanisms.

[0020] Furthermore, the lifting and horizontal movements of the fixture are both controlled by servo motors, ensuring the accuracy of the workpiece position and improving product consistency.

[0021] Furthermore, throughout the entire process from flattening the workpiece to welding, the workpiece remains in a completely positioned state, avoiding various uncontrollable factors.

[0022] Furthermore, the present invention can be adapted to various wheel rims of different diameters and specifications, and can achieve rapid model change by adjusting the cam phase and the trapezoidal lead screw.

[0023] Furthermore, the high clamping force of the clamping arms ensures that heavy-duty rims do not fall off during high-speed movement, and the groove design on the clamping arms disperses clamping stress and avoids indentation on the workpiece surface.

[0024] Furthermore, the clamp protection mechanism prevents welding spatter from corroding precision components such as the lifting seat and linear guide rail; the slag baffle can resist high-temperature spatter, reduce the radiant heat in the operating area, reduce the frequency of welding slag cleaning, and control the dust concentration in the workshop to a low level, thereby improving the working environment. Attached Figure Description

[0025] Figure 1 This is an overall schematic diagram of an automatic feeding device for a wheel rim welding machine according to an embodiment of the present invention; Figure 2 This is a top view of the automatic feeding mechanism in an automatic feeding device for a wheel rim welding machine according to an embodiment of the present invention; Figure 3 This is a front view of the automatic feeding mechanism in an automatic feeding device for a wheel rim welding machine according to an embodiment of the present invention; Figure 4 This is a logic diagram for accuracy correction testing of the automatic feeding mechanism in an automatic feeding device for a wheel rim welding machine according to an embodiment of the present invention; In the diagram: 1. Rounding machine; 101. Flattening machine; 2. Butt welding mechanism; 3. Automatic feeding mechanism; 301. Base; 302. Fixed seat; 303. Lifting motor; 304. Active lifting shaft; 305. Active rotating shaft; 306. Connecting rod; 307. Driven rotating shaft; 308. Driven lifting shaft; 309. Vertical linear guide rail; 310. Horizontal movement servo motor; 311. Synchronous belt; 312. Horizontal movement linear guide rail; 313. Lifting seat; 314. Horizontal movement seat; 4. Workpiece; 501. Clamping arm; 502. Clamping hand; 601. Slag baffle plate; 602. Slag baffle plate fixed seat; 603. Cylinder; 604. Guide shaft; 605. Guide sleeve. Detailed Implementation

[0026] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0027] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] Please see Figure 1 , Figure 2 as well as Figure 3 The figures shown are an overall schematic diagram, a top view, and a front view of an automatic feeding device for a wheel rim welding machine according to an embodiment of the present invention. An embodiment of the present invention provides an automatic feeding device for a wheel rim welding machine, comprising: A rim forming mechanism includes a circling machine 1 for bending sheet metal into a ring and a flattening machine 101 disposed at the output end of the circling machine 1 for flattening the opening of the ring workpiece 4. Welding mechanism 2 is located on the opposite side of the rim forming mechanism and is used to weld the opening of the flattened annular workpiece. An automatic feeding mechanism 3 is disposed between the rim forming mechanism and the welding mechanism 2, and includes a fixed seat 302, a base 301, a first moving part, a second moving part, and a clamp. The fixed seat 302 is fixedly disposed on the upper side of the rim forming mechanism, and the base 301 is fixedly disposed on the upper side of the fixed seat 302. The first moving part is disposed on the upper side of the base 301. The first moving part includes a lifting motor 303 fixedly disposed on one side of the base 301, and an active lifting shaft 304 disposed at the output end of the lifting motor 303. A first cam is disposed on the active lifting shaft 304. The working surface of the first cam abuts against the lifting seat 313. The first cam rotates to drive the lifting seat 313 to rise and fall. An active rotating shaft 305 is disposed on the active lifting shaft 304. The active rotating shaft 305 is located away from the active lifting shaft 304. One end of the lifting shaft 304 is provided with a connecting rod 306, and the other end of the connecting rod 306 is connected to the driven rotating shaft 307. The driven rotating shaft 307 is fixedly mounted on the driven lifting shaft 308. A second cam is provided on the driven lifting shaft 308. The working surface of the second cam abuts against the lifting seat 313. The second cam is used to synchronously drive the lifting seat 313 to rise and fall. Several vertical linear guide rails 309 are also provided between the lifting seat 313 and the base 301. The second moving part is slidably suspended at the bottom end of the lifting seat 313. The sliding direction of the second moving part is parallel to the connecting rod 306. The clamp is fixedly suspended at one end of the second moving part.

[0029] Understandably, in this embodiment, the core of the automatic feeding device for the rim welding machine lies in its highly efficient automated process design. The rim forming mechanism first rolls the flat metal into a ring using the rolling machine 1, and then pre-flattens the interface using the flattening machine 101 to prepare for subsequent welding. This segmented forming process helps improve the roundness accuracy of the rim and reduce residual stress. The welding mechanism 2 is arranged opposite to the forming mechanism, forming a smooth linear production layout, reducing the workpiece transfer path and improving production efficiency.

[0030] The automatic feeding mechanism 3 serves as a bridge connecting the two major functional modules. The fixed seat 302 and the base 301 form a stable foundation for the entire feeding mechanism, ensuring structural stability during high-frequency, long-stroke movements. The first moving part adopts a dual-cam synchronous drive structure, which simultaneously drives the active lifting shaft 304 and the driven lifting shaft 308 through a lifting motor 303. The connecting rod 306 keeps the two shafts rotating synchronously, so that the first cam and the second cam can push the lifting seat 313 synchronously. This design effectively avoids the jamming or off-center load problems that may occur with single-point drive, ensuring the smoothness and accuracy of the lifting process. The vertical linear guide rail 309 further constrains the movement trajectory of the lifting seat 313, reduces shaking, and lays the foundation for precise positioning.

[0031] Specifically, the second moving part includes: a horizontal moving base 314, a horizontal moving servo motor 310, a synchronous pulley, a synchronous belt 311, and a horizontal moving linear guide rail 312. The horizontal linear guide rail 312 is slidably suspended at the bottom end of the lifting seat 313. The synchronous pulleys are fixedly suspended at both ends of the lower side of the lifting seat 313. A synchronous belt 311 is installed on the synchronous pulleys. The horizontal servo motor 310 is connected to the synchronous pulleys to provide power. The synchronous belt 311 is driven to move horizontally through the synchronous pulleys. A pressure plate is provided on the synchronous belt 311, and the pressure plate is fixedly connected to the horizontal moving seat 314.

[0032] Understandably, in this embodiment, the second moving part is responsible for precise horizontal positioning. The transmission method using a servo motor in conjunction with a synchronous pulley and synchronous belt 311 offers advantages such as smooth transmission, low noise, high precision, and convenient maintenance. Compared to gear and rack or lead screw transmissions, synchronous belt 311 transmission is less expensive in certain long-stroke applications and avoids crawling. The horizontal moving linear guide 312 ensures that the horizontal moving seat 314 can only slide smoothly along a preset direction without shaking or offset. The entire horizontal moving system has a fast response speed and accurate positioning, enabling rapid transfer of workpieces from the forming station to the welding station, significantly shortening the interval time and improving the overall production line efficiency.

[0033] Specifically, the clamp includes: a left clamp, a right clamp, and a clamp closing mechanism; The left clamp and the right clamp have the same structure and are arranged opposite each other on both sides of one end of the horizontal moving seat 314. The clamp closing mechanism is inside the left clamp and the right clamp and is used to control the opening and closing of the clamp.

[0034] It is understood that in this embodiment, the fixture adopts a symmetrical design, with the left and right fixtures having the same structure, which simplifies parts management and spare parts inventory; the fixture closing mechanism is built into the clamping arm 501, which is compact and reduces the possibility of external interference, making it particularly suitable for operation in workstations with limited space; this design allows the fixture to be clamped from the inside or the outside of the rim workpiece 4, adapting to different rim structures and feeding requirements.

[0035] Specifically, the left clamp includes: The clamping arm 501 has the clamping closing structure installed inside it, and the workpiece 4 is clamped by relatively close movement through the clamping closing structure; The gripper 502 is provided with a groove to support the bottom plane of the workpiece 4, and anti-slip texture is provided on the surface of the workpiece gripping side to make the workpiece gripping more stable.

[0036] The clamping arm 501 serves as the main body for force transmission and support. Its internal closing mechanism provides power. The groove design at the end of the clamping hand 502 is crucial. Its curvature matches the shape of the bottom edge of the rim, which can reliably lift the workpiece to make the force distribution more reasonable and avoid deformation of thin-walled rims that may be caused by excessive lateral clamping force. It is particularly suitable for rim products with high processing precision requirements. In addition, the groove has a large contact area and low pressure, which makes it less likely to damage the surface of the workpiece.

[0037] Specifically, the clamp closing structure includes a closing cylinder, a piston rod, a rotating shaft, and a connecting rod 306; The piston rod of the closing cylinder is connected to the inner connecting rod 306 via a rotating shaft. When the piston rod extends, the gripper 502 moves horizontally closer to the piston rod. When the piston rod retracts, the gripper 502 moves horizontally apart from the piston rod.

[0038] Specifically, the clamp protection mechanism includes a slag-blocking plate 601, a slag-blocking plate fixing seat 602, a cylinder 603, a guide shaft 604, and a guide sleeve 605; The slag baffle fixing seat 602 is fixedly installed on the upper side of one end of the base 301, the slag baffle 601 is installed on the outer side of the slag baffle fixing seat 602, a cylinder 603 is fixedly installed at the upper center of the slag baffle 601, guide shafts 604 are fixedly installed on both sides of the cylinder 603, and guide sleeves 605 are provided on the outer side of the guide shafts 604.

[0039] Understandably, in this embodiment, sparks and spatter generated during welding can damage expensive fixtures, precision guide rails, and transmission components. The fixture protection mechanism is designed to address this issue. The slag-blocking plate 601 is typically made of high-temperature resistant, flame-retardant materials, such as specific steel plates or ceramic fiber boards. It forms a physical barrier between the fixture and the welding point. The slag-blocking plate 601 is raised and lowered by a cylinder 603. When protection is needed, the cylinder 603 pushes the slag-blocking plate 601 down to the protective position; when loading or maintenance is required, the cylinder 603 raises the slag-blocking plate 601 to create space. The guide shaft 604 and guide sleeve 605 ensure that the slag-blocking plate 601 rises and falls vertically without tilting. This device greatly extends the service life of key components of the automatic loading mechanism 3, reduces downtime for maintenance due to welding slag damage, and improves the overall utilization rate of the equipment.

[0040] Please see Figure 4 As shown, this is a logic diagram for the accuracy correction test of the automatic feeding mechanism 3 in an automatic feeding device for a wheel rim welding machine according to an embodiment of the present invention. Specifically, the automatic feeding mechanism 3 further includes a control module, which performs an accuracy correction test before the automatic feeding mechanism 3 is started to obtain displacement deviation characteristic values. The control module controls the fixture to clamp the workpiece 4, and the automatic feeding mechanism 3 moves from the initial position to the test position at a preset speed, recording the first displacement deviation; the automatic feeding mechanism 3 returns from the test position to the initial position at a preset speed, recording the second displacement deviation; the characteristic value of the displacement deviation is determined by the first displacement deviation and the second displacement deviation.

[0041] Specifically, in response to the displacement deviation characteristic value being less than a preset deviation value, the feeding accuracy meets the preset standard; in response to the displacement deviation characteristic value being greater than or equal to the preset deviation value, the feeding accuracy does not meet the preset standard. Preferably, the preset deviation value is 0.1m.

[0042] It is understandable that, in this embodiment, after long-term operation of the mechanical system, the repeatability of positioning accuracy may decrease due to wear, clearance, deformation, or changes in ambient temperature. Traditional periodic manual calibration is time-consuming and labor-intensive, while the automatic accuracy correction and testing function integrated into this device can be automatically executed before start-up or periodically. By having the feeding mechanism perform a complete standard cycle, and using built-in high-precision sensors, such as optical scales, magnetic scales, or encoders, the deviation between the stopping position and the theoretical position of the two round trips is recorded. This testing process simulates the actual working conditions, and the obtained deviation values ​​are more realistic. By analyzing these two deviation values, the displacement deviation characteristic value is obtained. This characteristic value quantifies the total positioning error of the current equipment. This function enables predictive maintenance of equipment status, transforming post-event repair into pre-event prevention, and greatly ensuring the stability of production quality.

[0043] Specifically, in response to the feeding accuracy not meeting the preset standard, the preset speed of the automatic feeding mechanism 3 is reduced.

[0044] Specifically, the reduction in the preset speed is positively correlated with the displacement deviation characteristic value and the preset deviation value. It is understood that the positive correlation can be linear or nonlinear, and is not specifically limited. The slope of the linear positive correlation is also not specifically limited and can be set according to the actual situation, as long as the larger the displacement deviation characteristic value, the larger the reduction in the preset speed. For example, if the reduction in the preset speed is set to ΔV, and the displacement deviation characteristic value is set to R, then ΔV = V0 × (R / R0), where V0 is the reference speed, preferably 1 m / s, and R0 is the preset deviation value, preferably 0.1 m.

[0045] The reduction in the preset speed is not fixed, but is adjusted proportionally according to the degree of accuracy deviation. The greater the deviation characteristic value exceeds the preset value, the more serious the accuracy degradation, and the greater the reduction in operating speed is required to more effectively eliminate the error. Conversely, if the deviation is very small, only a slight reduction in speed is needed. This positive correlation control strategy makes the adjustment more precise and reasonable, and can maintain a higher production efficiency as much as possible while ensuring accuracy, avoiding unnecessary production capacity loss caused by a one-size-fits-all speed reduction.

[0046] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic feeding device for a wheel rim welding machine, characterized in that, include: A rim forming mechanism, comprising a circling machine for bending sheet metal into a ring and a flattening machine located at the output end of the circling machine for flattening the opening of the ring workpiece. A welding mechanism is provided on the opposite side of the rim forming mechanism for welding the opening of the flattened annular workpiece. An automatic feeding mechanism is disposed between the rim forming mechanism and the welding mechanism, and includes a fixed seat, a base, a first moving part, a second moving part, and a clamp; The fixed seat is fixedly installed on the upper side of the rim forming mechanism, the base is fixedly installed on the upper side of the fixed seat, the first moving part is installed on the upper side of the base, the first moving part includes a lifting motor fixedly installed on one side of the base, an active lifting shaft installed at the output end of the lifting motor, a first cam installed on the active lifting shaft, the working surface of the first cam abutting against the lifting seat, the first cam rotating to drive the lifting seat to rise and fall, an active rotating shaft installed on the active lifting shaft, a connecting rod installed at one end of the active rotating shaft away from the active lifting shaft, the other end of the connecting rod connected to the driven rotating shaft, the driven rotating shaft fixedly installed on the driven lifting shaft, a second cam installed on the driven lifting shaft, the working surface of the second cam abutting against the lifting seat, the second cam used to synchronously drive the lifting seat to rise and fall, a number of vertical linear guide rails are also installed between the lifting seat and the base, the second moving part is slidably suspended at the bottom end of the lifting seat, the sliding direction of the second moving part is parallel to the connecting rod, and the clamp is fixedly suspended at one end of the second moving part.

2. The automatic feeding device for a wheel rim welding machine according to claim 1, characterized in that, The second moving part includes: a horizontal moving base, a horizontal moving servo motor, a synchronous pulley, a synchronous belt, and a horizontal moving linear guide; The horizontal linear guide rail is slidably suspended at the bottom of the lifting seat, and the synchronous pulleys are fixedly suspended at both ends of the lower side of the lifting seat. A synchronous belt is installed on the synchronous pulleys, and the horizontal servo motor is connected to the synchronous pulleys to provide power. The synchronous belt is driven to move horizontally through the synchronous pulleys. A pressure plate is provided on the synchronous belt, and the pressure plate is fixedly connected to the horizontal moving seat.

3. The automatic feeding device for a wheel rim welding machine according to claim 2, characterized in that, The clamp includes: a left clamp, a right clamp, and a clamp closing mechanism; The left clamp and the right clamp have the same structure and are arranged opposite each other on both sides of one end of the horizontal moving seat. The clamp closing mechanism is inside the left clamp and the right clamp and is used to control the opening and closing of the clamp.

4. The automatic feeding device for a wheel rim welding machine according to claim 3, characterized in that, The left clamp includes: The clamping arm has the clamping closing structure installed inside it, and the workpiece is clamped by moving relatively closer together through the clamping closing structure; The gripper has a groove to support the bottom plane of the workpiece, and anti-slip texture is provided on the surface of the workpiece gripping side to make the gripping of the workpiece more stable.

5. The automatic feeding device for a wheel rim welding machine according to claim 4, characterized in that, The clamp closing structure includes a closing cylinder, a piston rod, a rotating shaft, and a connecting rod; The piston rod of the closing cylinder is connected to the inner connecting rod via a rotating shaft. When the piston rod extends, the gripper moves horizontally closer to the piston rod. When the piston rod retracts, the gripper moves horizontally apart from the piston rod.

6. The automatic feeding device for a wheel rim welding machine according to claim 5, characterized in that, The clamp protection mechanism includes a slag baffle plate, a slag baffle plate fixing seat, a cylinder, a guide shaft, and a guide sleeve; The slag baffle fixing seat is fixedly installed on the upper side of one end of the base, the slag baffle is installed on the outer side of the slag baffle fixing seat, a cylinder is fixedly installed at the center position of the upper side of the slag baffle, guide shafts are fixedly installed on both sides of the cylinder, and guide sleeves are provided on the outer side of the guide shafts.

7. The automatic feeding device for a wheel rim welding machine according to claim 6, characterized in that, The automatic feeding mechanism also includes a control module, which performs a precision correction test before the automatic feeding mechanism is started to obtain displacement deviation characteristic values. The control module controls the fixture to pick up the workpiece, and the automatic feeding mechanism moves from the initial position to the test position at a preset speed to obtain the first displacement deviation; the automatic feeding mechanism returns from the test position to the initial position at a preset speed to obtain the second displacement deviation; the characteristic value of the displacement deviation is determined by the first displacement deviation and the second displacement deviation.

8. The automatic feeding device for a wheel rim welding machine according to claim 7, characterized in that, The feeding accuracy meets the preset standard when the displacement deviation characteristic value is less than the preset deviation value, and does not meet the preset standard when the displacement deviation characteristic value is greater than or equal to the preset deviation value.

9. The automatic feeding device for a wheel rim welding machine according to claim 8, characterized in that, In response to the fact that the feeding accuracy does not meet the preset standard, the preset speed of the automatic feeding mechanism is reduced.

10. The automatic feeding device for a wheel rim welding machine according to claim 9, characterized in that, The reduction in the preset speed is positively correlated with the displacement deviation characteristic value and the preset deviation value.

Images