Ear plate automatic welding machine

Abstract

The present invention discloses an automatic ear plate welding machine, wherein a round tube positioning device can stop and position a round tube workpiece, the ear plate positioning device can fix and position the ear plate and keep the ear plate in close contact with the outer circumferential surface of the round tube workpiece on the round tube positioning device, the welding gun base can be installed on a frame for reciprocating sliding along the axial direction of the round tube workpiece on the round tube positioning device, the welding gun feed slider can be installed on the welding gun base for moving toward the surface direction of the round tube workpiece on the round tube positioning device, the first and second welding gun driving devices respectively drive the welding gun base and the welding gun feed slider to move, the wire feeding device can provide welding wire to each welding gun, and each welding gun can weld corresponding to the gap between the round tube workpiece and the ear plate, and the control system controls the first welding gun driving device, the second welding gun driving device, the wire feeding device and the welding gun to move, the present invention realizes fully automatic high-precision welding of the round tube workpiece and the ear plate workpiece, the welding efficiency is high, and the ear plate welding cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to an automatic equipment, in particular to an automatic ear plate welding machine. Background Art

[0002] The long door bolt used to lock the door on the container is composed of a large long round tube workpiece with a lock head and a ring welded thereon and an ear plate. The ear plate is welded to the outer circumferential surface of the round tube workpiece to form a hook-shaped structure. When welding the ear plate on the long round tube workpiece, due to the long length and heavy weight of the round tube workpiece, it is currently completed by manual welding, which is labor-intensive, inconvenient to weld, and has low welding efficiency. It is also prone to poor welding, low welding precision, and high welding costs. Summary of the invention

[0003] In order to overcome the above defects, the present invention provides an automatic ear plate welding machine, which realizes full-automatic welding of ear plates on round tube workpieces, has high welding efficiency, high welding precision and saves labor.

[0004] The present invention adopts a technical solution to solve its technical problems: an automatic ear plate welding machine, including a frame, a round tube positioning device, an ear plate positioning device, a wire feeding device, a welding gun, a welding gun base, a welding gun feeding slide, a first welding gun driving device, a second welding gun driving device and a control system, wherein the round tube positioning device is fixedly mounted on the frame, the round tube positioning device can stop and position the round tube workpiece, the ear plate positioning device is mounted on the frame, the ear plate positioning device can fix and position the ear plate and keep the ear plate and the outer circumferential surface of the round tube workpiece on the round tube positioning device in close contact, and the welding gun base can The round tube positioning device is installed on the frame to reciprocate along the axial direction of the round tube workpiece. The welding gun feed slider can be installed on the welding gun base to move toward the surface direction of the round tube workpiece on the round tube positioning device. The first welding gun driving device and the second welding gun driving device respectively drive the welding gun base and the welding gun feed slider to move. The wire feeding device is fixedly installed on the welding gun base. The wire feeding device can provide welding wire to each welding gun. Each welding gun can weld the gap between the round tube workpiece and the ear plate. The control system controls the first welding gun driving device, the second welding gun driving device, the wire feeding device and the welding gun.

[0005] As a further improvement of the present invention, the ear plate positioning device includes a clamping base, a clamping claw, a clamping drive device and a pressing drive device. The clamping base can be installed on the frame along the radial movement of the round tube on the round tube positioning device. The clamping claw is installed on the clamping base. The clamping claw can loosen or clamp the ear plate. The clamping drive device drives the clamping claw to loosen or clamp, and the pressing drive device drives the clamping base to move. The control system controls the start and stop of the clamping drive device and the pressing drive device.

[0006] As a further improvement of the present invention, an ear plate storage flow channel, an ear plate feeding push block and an ear plate feeding drive device are also provided. The ear plate storage flow channel can sequentially convey the ear plate workpieces forward. A baffle that can block the ear plate workpiece from continuing to move forward is provided at the end of the ear plate storage flow channel. The ear plate positioning device is located on one side of the end of the ear plate storage flow channel. The ear plate feeding push block can be installed on the other side of the end of the ear plate storage flow channel and can reciprocate along the conveying direction of the ear plate storage flow channel. The ear plate feeding push block can push an ear plate workpiece at the end of the ear plate storage flow channel into the clamping claw of the ear plate positioning device. The ear plate feeding drive device drives the ear plate feeding push block to move, and the control system controls the start and stop of the ear plate feeding drive device.

[0007] As a further improvement of the present invention, an ear plate lifting block, an ear plate lifting drive device and an ear plate in-position sensing device are also provided. The ear plate lifting block can be installed in the starting end of the ear plate material storage channel in a telescopic manner along the conveying direction of the ear plate material storage channel. The ear plate lifting block can press tightly the starting ends of the entire row of ear plate workpieces arranged one by one in the ear plate material storage channel. The ear plate lifting drive device can provide a pressing force to the ear plate lifting block. The ear plate in-position sensing device can sense the ear plate located at the end of the ear plate material storage channel and facing the clamping claw of the ear plate positioning device. The ear plate in-position sensing device transmits a signal to the control system, and the control system controls the start and stop of the ear plate lifting drive device.

[0008] As a further improvement of the present invention, a mobile positioning module is also provided, including a horizontal feed slider, a vertical lifting slider, a horizontal feed drive device, a vertical lifting drive device, a round tube supporting frame, a first rotating wheel, a second rotating wheel, a lock position sensing device and an adjustment drive device. The horizontal feed slider can be installed on the frame so as to slide back and forth on the horizontal plane, the vertical lifting slider can be installed on the horizontal feed slider in the longitudinal direction, the round tube supporting frame is fixedly installed on the vertical lifting slider, the round tube supporting frame can be directly opposite to the position of the round tube positioning device, the first rotating wheel and the second rotating wheel can be rotatably installed on the round tube supporting frame respectively, the first rotating wheel and the second rotating wheel are arranged in parallel and spaced apart in the horizontal direction, the round tube workpiece can be supported just between the outer circumferential surfaces of the first rotating wheel and the second rotating wheel, the adjustment drive device can drive the first rotating wheel and the second rotating wheel to rotate in the same direction, the lock position sensing device can sense the placement direction and position information of the locks at both ends of the round tube workpiece and transmit the information to the control system, and the control system controls the start and stop of the horizontal feed drive device, the vertical lifting drive device and the adjustment drive device.

[0009] As a further improvement of the present invention, a centering positioning push block and a centering drive device are also provided. The two centering positioning push blocks can be installed on the frame so as to move relative to each other. The two centering positioning push blocks can be tightly pressed against the axial end faces of the round tube supported on the round tube support frame. The centering drive device drives the centering positioning push blocks to move relative to each other, and the control system controls the start and stop of the centering drive device.

[0010] As a further improvement of the present invention, an automatic feeding conveyor line is also provided, including a conveyor chain and a plurality of round tube baffles, the plurality of round tube baffles are fixedly installed on the conveyor chain at intervals, a groove-shaped space for accommodating and positioning the round tube workpiece is formed between two adjacent round tube baffles, the end of the conveyor chain is just above the gap between the first rotating wheel and the second rotating wheel on the round tube support frame in the initial position, and the control system controls the start and stop of the conveyor chain.

[0011] As a further improvement of the present invention, a first material presence sensing device is provided on the round tube support frame, and the first material presence sensing device can sense the round tube workpiece between the first rotating wheel and the second rotating wheel on the round tube support frame and transmit a signal to the control system. A second material presence sensing device is also provided on the feeding conveyor line, and the second material presence sensing device can sense the round tube between adjacent round tube baffles at the conveying end of the conveyor chain and transmit a signal to the control system.

[0012] As a further improvement of the present invention, the round tube positioning device includes a round tube carrier, a lock clamping mechanism and a rotation drive device. The round tube carrier is fixedly installed on the frame, the round tube carrier can support the round tube, the lock clamping mechanism can be rotatably installed on the frame at both ends of the round tube carrier along the axial direction of the round tube, the lock clamping mechanism can clamp the locks at both ends of the round tube, the rotation drive device can drive the lock clamping mechanism to rotate to a set angle, and a lock precise position sensing device is also provided. The lock precise position sensing device can sense the precise position of the locks at both ends of the round tube and transmit signals to the control system, and the control system controls the action of the lock clamping mechanism and the rotation drive device.

[0013] As a further improvement of the present invention, a material unloading buffer mechanism is also provided, including an inclined slide and a stopper. The inclined slide is fixedly mounted on the frame, and the round tube support frame can reach directly above the end of the inclined slide with a higher height. The stopper is fixedly mounted on the end of the inclined slide with a lower height and stops the circumferential outer surface of the round tube workpiece on the inclined slide.

[0014] The beneficial effects of the present invention are as follows: the present invention realizes automatic loading of round tube workpieces through an automatic loading conveyor line, and automatically pre-corrects the position of the round tube workpiece in the axial and circumferential directions through a mobile positioning module, thereby ensuring that the ear plate welding position is accurate and consistent; the ear plate is fully automatically fed through the ear plate storage flow channel and the ear plate feeding push block, and is clamped and sent to the surface of the round tube workpiece for welding, and the welding is firm and stable. The present invention realizes fully automatic loading of round tube workpieces and ear plate workpieces, as well as fully automatic high-precision welding, with high welding efficiency, labor saving, and greatly reducing the ear plate welding cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a first stereogram of the present invention;

[0016] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0017] Figure 3 A second stereogram of the present invention;

[0018] Figure 4 is a third stereogram of the present invention;

[0019] Figure 5 It is a front view of the present invention;

[0020] Figure 6 A top view of the present invention;

[0021] Figure 7 It is the right side view of the present invention. DETAILED DESCRIPTION

[0022] Embodiment: An automatic ear plate welding machine comprises a frame 1, a round tube positioning device, an ear plate positioning device, a wire feeding device 3, a welding gun 4, a welding gun base 5, a welding gun feeding slide 6, a first welding gun driving device 7, a second welding gun driving device 8 and a control system, wherein the round tube positioning device is fixedly mounted on the frame 1, the round tube positioning device can stop and position the round tube workpiece, the ear plate positioning device is mounted on the frame 1, the ear plate positioning device can fix and position the ear plate and keep the ear plate and the outer circumferential surface of the round tube workpiece on the round tube positioning device in close contact, and the welding gun base 5 can move along the round tube workpiece on the round tube positioning device. The parts are installed on the frame 1 for axial reciprocating sliding, the welding gun feed slide block 6 can be installed on the welding gun base 5 to move toward the surface direction of the round tube workpiece on the round tube positioning device, the first welding gun driving device 7 and the second welding gun driving device 8 respectively drive the welding gun base 5 and the welding gun feed slide block 6 to move, the wire feeding device 3 is fixedly installed on the welding gun base 5, the wire feeding device 3 can provide welding wire to each welding gun 4, and each welding gun 4 can weld the gap between the round tube workpiece and the ear plate, and the control system controls the first welding gun driving device 7, the second welding gun driving device 8, the wire feeding device 3 and the welding gun 4. Before welding, the round tube workpiece is first placed on the round tube positioning device for positioning, and then the ear plate is fixedly positioned on the ear plate positioning device. At this time, the ear plate is tightly attached to the outer surface of the circumference of the round tube workpiece, the welding gun 4 moves toward the direction of the round tube workpiece to reach the welding position, and then the welding gun 4 moves along the axial direction of the round tube workpiece while welding to form a straight weld, and a welding gun 4 is set on both sides of the ear plate to achieve synchronous welding of the welds on both sides of the ear plate.

[0023] The ear plate positioning device includes a clamping base 9, a clamping jaw 10, a clamping drive device 11 and a pressing drive device 12. The clamping base 9 can be installed on the frame 1 along the radial movement of the round tube on the round tube positioning device. The clamping jaw 10 is installed on the clamping base 9. The clamping jaw 10 can loosen or clamp the ear plate. The clamping drive device 11 drives the clamping jaw 10 to loosen or clamp the movement. The pressing drive device 12 drives the clamping base 9 to move. The control system controls the clamping drive device 11 and the pressing drive device 12 to start and stop. The ear plate is clamped by the clamping jaw 10 to achieve fixed positioning of the ear plate. The ear plate is fed by the movement of the clamping base 9, and finally welded tightly with the round tube workpiece. The structure is simple and the positioning is convenient and quick. In addition, other positioning devices such as screw locking can also be used.

[0024] An ear plate storage channel 13, an ear plate feeding push block 14 and an ear plate feeding drive device 15 are also provided. The ear plate storage channel 13 can sequentially convey the ear plate workpieces forward. A baffle that can block the ear plate workpieces from continuing to move forward is provided at the end of the ear plate storage channel 13. The ear plate positioning device is located on one side of the end of the ear plate storage channel 13. The ear plate feeding push block 14 can be installed on the other side of the end of the ear plate storage channel 13 and can reciprocate along the conveying direction of the ear plate storage channel 13. The ear plate feeding push block 14 can push an ear plate workpiece at the end of the ear plate storage channel 13 into the clamping claw 10 of the ear plate positioning device. The ear plate feeding drive device 15 drives the ear plate feeding push block 14 to move, and the control system controls the start and stop of the ear plate feeding drive device 15. The ear plate workpiece is stored and automatically fed through the ear plate storage channel 13 to avoid manual loading. After the ear plate workpiece is transported to the end of the ear plate storage channel 13, the ear plate feeding push block 14 pushes it into the clamping jaw 10 for clamping and positioning. This structure realizes automatic loading and positioning of the ear plate workpiece, avoids manual operation, saves labor, and has high positioning efficiency.

[0025] An ear plate lifting block 16, an ear plate lifting drive device and an ear plate in-position sensing device are also provided. The ear plate lifting block 16 can be installed in the starting end of the ear plate material storage channel 13 in a telescopic manner along the conveying direction of the ear plate material storage channel 13. The ear plate lifting block 16 can press tightly the starting ends of the entire row of ear plate workpieces arranged one by one in the ear plate material storage channel 13. The ear plate lifting drive device can provide a pressing force to the ear plate lifting block 16. The ear plate in-position sensing device can sense the ear plate located at the end of the ear plate material storage channel 13 and facing the clamping claw 10 of the ear plate positioning device. The ear plate in-position sensing device transmits a signal to the control system, and the control system controls the start and stop of the ear plate lifting drive device. The ear plates are arranged one by one in the ear plate storage channel 13 in sequence, and are supported by the ear plate pushing block 16 so that the front one reaches the end of the ear plate storage channel 13. At this time, the ear plate at the end is just opposite to the clamping claw 10. After the ear plate in-place sensing device senses that the ear plate is in place, the ear plate feeding push block 14 pushes the ear plate at the end of the ear plate storage channel 13 into the clamping claw 10 and is clamped by the clamping claw 10. When the ear plate feeding push block 14 processes the ear plate and pushes it out, the ear plate in-place sensing device cannot sense the ear plate, and the ear plate pushing drive device stops the ear plate pushing block 16 from pushing the ear plate queue. After the ear plate feeding push block 14 is reset, the ear plate pushing drive device restarts the pushing of the ear plate queue. This structure realizes intermittent ear plate feeding, has a simple structure, high feeding efficiency, high feeding accuracy, and will not interfere with the ear plate feeding push block 14. In addition, the ear plate storage channel 13 can also be fed forward by a conveyor belt.

[0026] A mobile positioning module is also provided, including a horizontal feed slider 17, a vertical lifting slider 18, a horizontal feed drive device, a vertical lifting drive device 19, a round tube support frame 20, a first rotating wheel 21, a second rotating wheel 22, a lock position sensing device and an adjustment drive device 23. The horizontal feed slider 17 can be installed on the frame 1 to slide back and forth on the horizontal plane, the vertical lifting slider 18 can be installed on the horizontal feed slider 17 to be lifted and lowered in the longitudinal direction, the round tube support frame 20 is fixedly installed on the vertical lifting slider 18, and the round tube support frame 20 can be directly opposite to the round tube positioning device. A rotating wheel 21 and a second rotating wheel 22 are rotatably installed on the round tube supporting frame 20 respectively. The first rotating wheel 21 and the second rotating wheel 22 are arranged in parallel and spaced apart in the horizontal direction. The round tube workpiece can be supported between the outer circumferential surfaces of the first rotating wheel 21 and the second rotating wheel 22. The adjustment drive device 23 can drive the first rotating wheel 21 and the second rotating wheel 22 to rotate in the same direction. The lock position sensing device can sense the placement direction and position information of the locks at both ends of the round tube workpiece and transmit the signal to the control system. The control system controls the start and stop of the horizontal feed drive device, the vertical lifting drive device 19 and the adjustment drive device 23. The round workpiece is first placed between the first rotating wheel 21 and the second rotating wheel 22 of the round tube supporting frame 20, and is supported by the first rotating wheel 21 and the second rotating wheel 22. The lock position sensing device senses the lock direction information on the round tube workpiece, and the first rotating wheel 21 and the second rotating wheel 22 rotate the round tube workpiece so that the lock thereon rotates to the specified direction position. Then the round tube supporting frame 20 places the round tube on the round tube positioning device through horizontal and vertical movements to achieve directional placement of the round tube, ensure that the ear plate is accurately welded at the specified position of the round tube, and ensure that the ear plate welding position is accurate and consistent.

[0027] A centering positioning push block 24 and a centering drive device 25 are also provided. Two centering positioning push blocks 24 are installed on the frame 1 so as to be relatively movable. The two centering positioning push blocks 24 can be pressed against the axial end faces of the round tube supported on the round tube support frame 20. The centering drive device 25 drives the centering positioning push blocks 24 to move relatively. The control system controls the start and stop of the centering drive device 25. After the round tube workpiece is placed on the first rotating wheel 21 and the second rotating wheel 22, the centering positioning push block 24 pushes the round tube workpiece to be axially centered and positioned, so as to realize the positioning of the axial position of the round tube workpiece and ensure the accurate position of the circumferential welding.

[0028] An automatic feeding conveyor line is also provided, including a conveyor chain 26 and a plurality of round tube baffles 27. The plurality of round tube baffles 27 are fixedly installed on the conveyor chain 26 at intervals, and a groove-shaped space for accommodating and positioning the round tube workpiece is formed between two adjacent round tube baffles. The end of the conveyor chain 26 is just above the gap between the first rotating wheel 21 and the second rotating wheel 22 on the round tube support frame 20 at the initial position, and the control system controls the start and stop of the conveyor chain 26. The feeding conveyor line can realize the automatic conveying and feeding of the round tube workpiece. When the round tube workpiece moves with the conveyor line to the position just above the first rotating wheel 21 and the second rotating wheel 22 of the round tube support frame 20, the round tube workpiece just reaches the end of the conveyor line, and it automatically falls between the first rotating wheel 21 and the second rotating wheel 22, avoiding manual feeding.

[0029] The round tube support frame 20 is provided with a first material presence sensing device, which can sense the round tube workpiece between the first rotating wheel 21 and the second rotating wheel 22 on the round tube support frame 20 and transmit a signal to the control system. The feeding conveyor line is also provided with a second material presence sensing device, which can sense the round tube between the adjacent round tube baffles at the conveying end of the conveyor chain 26 and transmit a signal to the control system. Only when the round tube support frame 20 is located at the initial position at the conveying end of the conveyor line, and the first material presence sensing device senses that there is no round tube workpiece on the round tube support frame 20, and the second material presence sensing device senses that there is a round tube workpiece at the end of the conveyor line, the conveyor line runs a set distance, and a round tube is placed on the round tube support frame 20, and the material is automatically and accurately loaded without manual operation.

[0030] The round tube positioning device includes a round tube carrier 2, a lock clamping mechanism 28 and a rotation drive device 29. The round tube carrier 2 is fixedly installed on the frame 1, and the round tube carrier 2 can support the round tube. The lock clamping mechanism 28 can be rotatably installed on the round tube carrier 2 on the frame 1 at both ends of the round tube axial direction. The lock clamping mechanism 28 can clamp the locks at both ends of the round tube. The rotation drive device 29 can drive the lock clamping mechanism 28 to rotate to a set angle. A lock precise position sensing device is also provided. The lock precise position sensing device can sense the precise position of the locks at both ends of the round tube and transmit signals to the control system. The control system controls the lock clamping mechanism 28 and the rotation drive device 29 to operate. After the round tube is placed on the round tube carrier 2, the precise position of the lock is sensed, and the control system controls the lock clamping mechanism 28 to clamp the lock, and then drives the lock to rotate so that the lock reaches a precise angle position. After it is in place, the control system automatically controls the feeding and welding of the welding gun 4, as well as the feeding, positioning and close contact with the round tube workpiece to wait for welding of the ear plate, etc., which is automated control to avoid manual operation.

[0031] A material unloading buffer mechanism is also provided, including an inclined slide 30 and a stopper 31. The inclined slide 30 is fixedly mounted on the frame 1. The round tube support frame 20 can reach directly above the end of the inclined slide 30 with a high height. The stopper 31 is fixedly mounted on the end of the inclined slide 30 with a low height and stops the outer circumferential surface of the round tube workpiece on the inclined slide 30. The workpiece after the ear plate welding is sent by the round tube support frame 20 to the material unloading buffer mechanism for buffering and storage, which is convenient for subsequent operations without manual unloading. The stopper 31 can be installed at the end of the inclined slide 30 so that it can be lifted and lowered, which is convenient for unloading.

Claims

1. An automatic ear plate welding machine, characterized in that: The invention comprises a frame (1), a round tube positioning device, an ear plate positioning device, a wire feeding device (3), a welding gun (4), a welding gun base (5), a welding gun feeding slide block (6), a first welding gun driving device (7), a second welding gun driving device (8) and a control system, wherein the round tube positioning device is fixedly mounted on the frame, the round tube positioning device can stop and position the round tube workpiece, the ear plate positioning device is mounted on the frame, the ear plate positioning device can fix and position the ear plate and keep the ear plate and the outer circumferential surface of the round tube workpiece on the round tube positioning device in close contact, and the welding gun base can be positioned along the round tube. The round tube workpiece on the device is installed on the frame for axial reciprocating sliding, the welding gun feed slider can be installed on the welding gun base to move toward the surface direction of the round tube workpiece on the round tube positioning device, the first welding gun driving device and the second welding gun driving device respectively drive the welding gun base and the welding gun feed slider to move, the wire feeding device is fixedly installed on the welding gun base, the wire feeding device can provide welding wire to each welding gun, and each welding gun can weld the gap between the round tube workpiece and the ear plate, and the control system controls the first welding gun driving device, the second welding gun driving device, the wire feeding device and the welding gun to move; The ear plate positioning device comprises a clamping base (9), a clamping claw (10), a clamping drive device (11) and a pressing drive device (12); the clamping base is mounted on a frame and can move along the radial direction of a round tube on the round tube positioning device; the clamping claw is mounted on the clamping base; the clamping claw can loosen or clamp the ear plate; the clamping drive device drives the clamping claw to loosen or clamp; the pressing drive device drives the clamping base to move; and the control system controls the start and stop of the clamping drive device and the pressing drive device; The invention also provides a mobile positioning module, including a horizontal feed slider (17), a vertical lifting slider (18), a horizontal feed drive device, a vertical lifting drive device (19), a round tube support frame (20), a first rotating wheel (21), a second rotating wheel (22), a lock position sensing device and an adjustment drive device (23). The horizontal feed slider can be installed on the frame to reciprocate on the horizontal plane, the vertical lifting slider can be installed on the horizontal feed slider to be lifted in the longitudinal direction, the round tube support frame is fixedly installed on the vertical lifting slider, and the round tube support frame can be connected to the vertical lifting slider. The position of the round tube positioning device is directly opposite, the first rotating wheel and the second rotating wheel are rotatably installed on the round tube supporting frame respectively, the first rotating wheel and the second rotating wheel are arranged in parallel and spaced apart in the horizontal direction, the round tube workpiece can be supported just between the outer circumferential surfaces of the first rotating wheel and the second rotating wheel, the adjustment driving device can drive the first rotating wheel and the second rotating wheel to rotate in the same direction, the lock position sensing device can sense the placement direction and position information of the locks at both ends of the round tube workpiece and transmit the information to the control system, and the control system controls the start and stop of the horizontal feeding driving device, the vertical lifting driving device and the adjustment driving device; The round tube positioning device comprises a round tube carrier (2), a lock clamping mechanism (28) and a rotary drive device (29), wherein the round tube carrier is fixedly mounted on a frame and can support the round tube, the lock clamping mechanism can be rotatably mounted on the frame at both ends of the round tube carrier along the axial direction of the round tube, the lock clamping mechanism can clamp the locks at both ends of the round tube, the rotary drive device can drive the lock clamping mechanism to rotate to a set angle, and a lock precise position sensing device is also provided, the lock precise position sensing device can sense the precise position of the locks at both ends of the round tube and transmit signals to a control system, and the control system controls the actions of the lock clamping mechanism and the rotary drive device.

2. The ear plate automatic welding machine according to claim 1, characterized in that: An ear plate material storage channel (13), an ear plate material feeding push block (14) and an ear plate material feeding drive device (15) are also provided. The ear plate material storage channel can sequentially convey the ear plate workpieces forward. A baffle that can block the ear plate workpieces from continuing to move forward is provided at the end of the ear plate material storage channel. The ear plate positioning device is located at one side of the end of the ear plate material storage channel. The ear plate material feeding push block is installed at the other side of the end of the ear plate material storage channel and can reciprocate along the conveying direction of the ear plate material storage channel. The ear plate material feeding push block can push an ear plate workpiece at the end of the ear plate material storage channel into the clamping claw of the ear plate positioning device. The ear plate material feeding drive device drives the ear plate material feeding push block to move. The control system controls the start and stop of the ear plate material feeding drive device.

3. The ear plate automatic welding machine according to claim 2, characterized in that: Also provided are an ear plate lifting block (16), an ear plate lifting driving device and an ear plate in-position sensing device. The ear plate lifting block can be installed in the starting end of the ear plate material storage flow channel in a telescopic manner along the conveying direction of the ear plate material storage flow channel. The ear plate lifting block can press tightly against the starting ends of the entire row of ear plate workpieces arranged one by one in sequence in the ear plate material storage flow channel. The ear plate lifting driving device can provide a pressing force to the ear plate lifting block. The ear plate in-position sensing device can sense the ear plate located at the end of the ear plate material storage flow channel and facing the clamping claw of the ear plate positioning device. The ear plate in-position sensing device transmits a signal to the control system, and the control system controls the start and stop of the ear plate lifting driving device.

4. The ear plate automatic welding machine according to claim 1, characterized in that: A centering positioning push block (24) and a centering drive device (25) are also provided. The two centering positioning push blocks are mounted on the frame so as to be relatively movable. The two centering positioning push blocks can be tightly pressed against the axial end faces of the round tube supported on the round tube support frame. The centering drive device drives the centering positioning push blocks to move relatively. The control system controls the start and stop of the centering drive device.

5. The ear plate automatic welding machine according to claim 1, characterized in that: An automatic feeding conveyor line is also provided, comprising a conveyor chain (26) and a plurality of round tube baffles (27). The plurality of round tube baffles are fixedly installed on the conveyor chain at intervals, and a groove-shaped space for accommodating and positioning the round tube workpiece is formed between two adjacent round tube baffles. The end of the conveyor chain is located just above the gap between the first rotating wheel and the second rotating wheel on the round tube supporting frame at the initial position, and the control system controls the start and stop of the conveyor chain.

6. The ear plate automatic welding machine according to claim 5, characterized in that: A first material presence sensing device is provided on the round tube support frame, which can sense the round tube workpiece between the first rotating wheel and the second rotating wheel on the round tube support frame and transmit a signal to the control system. A second material presence sensing device is also provided on the feeding conveyor line, which can sense the round tube between adjacent round tube baffles at the conveying end of the conveyor chain and transmit a signal to the control system.

7. The ear plate automatic welding machine according to claim 1, characterized in that: A material unloading buffer mechanism is also provided, comprising an inclined slideway (30) and a stopper (31), wherein the inclined slideway is fixedly mounted on the frame, the round tube support frame can reach directly above the end of the inclined slideway with a higher height, and the stopper is fixedly mounted on the end of the inclined slideway with a lower height and stops the outer circumferential surface of the round tube workpiece on the inclined slideway.

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