A coil welding device capable of automatic traction

Abstract

The present invention relates to the technical field of coil welding device design, and discloses a coil welding device that can be automatically pulled, including a working frame, a rear welding device and a front welding device, wherein a driven frame is provided at the left end of the working frame, a rear welding device is provided behind the left end of the working frame, a front welding device is provided in front of the working frame, a cooling device is provided in the middle section of the working frame, and a grinding device is provided on the right side of the cooling device. The present invention arranges a DC motor in the active frame to drive four groups of rollers to cooperate with transmission gears to realize the operation regulation of two groups of conveying frames, drive the coil to realize dynamic and static coordinated welding, transportation and weld beautification treatment, improve the work efficiency of coil welding, and realize the operation control of the conveying frame by arranging the mutual engagement of the transmission gear and the conveying frame tooth groove, and cooperate with the rotation of the rollers to improve the practicality of the operation of the device, so that the device can continuously realize the coil welding operation.

Description

Technical Field

[0001] The invention relates to the field of coil welding device design, in particular to a coil welding device capable of automatic traction. Background Art

[0002] At present, coil welding mostly adopts independent welding one by one. The coil needs to weld the joints of multiple pipe bodies and connecting elbows at the front and rear ends of the pipeline. The traditional welding method is inefficient. After completing the welding of the upper end face of the pipe body on one side, it is necessary to manually flip it over and weld the other end face of the pipe body on that side. Then push the coil out in the opposite direction and repeat the above operation on the other side of the pipe body on the opposite side of the rack. The welding efficiency of the coil is low, and workers need to repeatedly perform manual flipping, which consumes a lot of manpower and operation time. The weld cannot be processed, which reduces the welding quality of the coil and its user experience is poor. To this end, a coil welding device that can be automatically towed is proposed. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In order to solve at least one aspect of the above problems, the present invention first provides an automatically towed coil welding device, which uses an automated wrapped welding gun to weld the coil single tube body and the connecting bent pipes, and then cools and grinds the weld to improve the welding quality of the welding device.

[0005] (II) Technical solution

[0006] In order to solve the technical problem, the present invention provides an automatically towed coil welding device, comprising a working frame, a rear welding device and a front welding device, a driven frame is provided at the left end of the working frame, a rear welding device is provided behind the left end of the working frame, a front welding device is provided in front of the working frame, a cooling device is provided in the middle section of the working frame, a grinding device is provided on the right side of the cooling device, and an active frame is provided at the right end of the working frame.

[0007] As a preferred solution of the present invention, wherein: the rear welding device includes two groups of rear fixing frames, the inner sides of the two groups of rear fixing frames are respectively provided with first vertical frames, a first welding adjustment seat is provided between the two groups of first vertical frames, a first setting seat is provided at the bottom of the first welding adjustment seat, a plurality of groups of first upper welding guns are evenly arranged on the front end panel of the first setting seat, a group of first lower welding guns is respectively provided under each group of first upper welding guns, a first push plate is provided on the rear fixing frame, and a group of first cylinders are respectively provided on the rear end face of the rear fixing frame.

[0008] As a preferred solution of the present invention, the cooling device includes a first positioning seat, a group of first columns are respectively provided at the front and rear ends of the first positioning seat, a group of transverse frames are respectively provided on the top of the first columns, a group of limiting frames are respectively provided on the inner sides of the two groups of transverse frames, a group of cold air seats are respectively provided under the two groups of transverse frames, and a connecting frame is provided between the two groups of transverse frames.

[0009] As a preferred solution of the present invention, the grinding device includes a second positioning seat, a group of second columns are respectively provided at the front and rear ends of the second positioning seat, a group of grinding frames are respectively provided on the top of the second columns, a group of grinding motors are respectively provided at the left ends of the grinding frames, a number of upper grinding rollers are provided at the upper ends of the inner cavities of the two groups of grinding frames, and a group of lower grinding rollers are respectively provided directly below the upper grinding rollers.

[0010] Furthermore, the first upper welding gun comprises a connecting head, a movable terminal is provided at the front end of the connecting head, a connecting rod is provided at the front end of the movable terminal, and a welding needle is provided at the front end of the connecting rod.

[0011] Furthermore, the front welding device includes two groups of front fixing frames, the inner sides of the two groups of front fixing frames are respectively provided with second vertical frames, the second vertical frames are provided with front welding components, the front fixing frames are provided with second push plates, and the front end surfaces of the front fixing frames are respectively provided with a group of second cylinders.

[0012] Furthermore, a first protective cover plate is provided on the top of the driven frame, a group of second driven rollers are provided in front and behind the first protective cover plate, first driven rollers are provided under the second driven rollers, a rear conveying frame is provided at the rear end of the first driven roller, and a front conveying frame is provided at the front end of the first driven roller.

[0013] Furthermore, the front and rear inner walls of the working frame are respectively provided with an upper limit frame and a lower limit frame at the bottom of the frame bodies corresponding to the two groups of conveying frames.

[0014] Furthermore, the rear conveying rack and the front conveying rack are provided with a plurality of groups of coil placement identification racks opposite to each other.

[0015] Furthermore, a DC motor is provided at the bottom of the inner cavity of the active frame, a rotating shaft is provided at the output end of the DC motor, the rotating shaft is connected to a first active roller via a belt, and a second active roller is provided above the first active roller.

[0016] Furthermore, the first driving roller is provided with a first transmission gear at both ends of the front and rear ends, and the second driving roller is provided with a second transmission gear at both ends of the front and rear ends.

[0017] (III) Beneficial effects

[0018] 1. The present invention provides an automatically towed coil welding device, in which a DC motor is arranged in an active frame to drive four groups of rollers to cooperate with transmission gears to realize the operation regulation of two groups of conveyor frames, drive the coils to realize dynamic and static coordinated welding, transportation and weld beautification processing, complete the welding and grinding processing of multiple groups of coil single tube bodies and connecting elbows at one time, improve the working efficiency of coil welding, and realize the operation control of the conveyor frame by arranging the mutual engagement of the transmission gear and the conveyor frame tooth groove, cooperate with the rotation of the rollers, improve the practicality of the operation of the device, so that the device can continuously realize the coil welding operation.

[0019] 2. The scheme of the present invention adopts multiple groups of upper and lower butt welding processing devices, which can independently perform two groups of upper and lower butt welding processing on the welding points of each group of coil single tube bodies and connecting elbows. Multiple groups of welding devices are set to work simultaneously, and the welding operation can be completed in a very short time. In addition, this scheme breaks away from the traditional processing method of gradually welding the coil single tube body, then manually pushing it out to complete the opposite side welding, and then turning the coil over and repeating the above operation. It can quickly complete the welding work with extremely high welding efficiency, reduce manual participation, reduce the negative impact of coil turning on the tube body itself and the weld quality, and ensure the quality of welding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a coil welding device according to an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a post-welding device of a coil welding device according to an embodiment of the present invention;

[0022] Figure 3 A schematic structural diagram of region A of a coiled tube welding device according to an embodiment of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a front welding device of a coil welding device according to an embodiment of the present invention;

[0024] Figure 5 It is a schematic structural diagram of a cooling device of a coil welding device according to an embodiment of the present invention;

[0025] Figure 6 A schematic structural diagram of a grinding device for a coiled tube welding device according to an embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the installation structure of the grinding assembly of the coil welding device according to an embodiment of the present invention;

[0027] Figure 8 It is a schematic structural diagram of an active frame of a coil welding device according to an embodiment of the present invention;

[0028] Fig. 9It is a structural schematic diagram of the transmission control of the coil welding device according to an embodiment of the present invention;

[0029] Fig.10 It is a schematic structural diagram of the gear arrangement of the coil welding device according to an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1 is a driven frame, 11 is a first protective cover, 12 is a rear conveying frame, 13 is an upper limit frame, 14 is a lower limit frame, 15 is a coil placement identification frame, 16 is a first driven roller, 17 is a second driven roller, 2 is a working frame, 3 is a rear welding device, 31 is a rear fixed frame, 32 is a first stand, 33 is a first welding adjustment seat, 34 is a first setting seat, 35 is a first upper welding gun, 351 is a connecting head, 352 is a moving end head, 353 is a connecting rod, 354 is a welding needle, 36 is a first lower welding gun, 37 is a first push plate, 38 is a first push plate, 4 is the first cylinder, 41 is the front welding device, 42 is the second frame, 43 is the second push plate, 44 is the second cylinder, 5 is the cooling device, 51 is the first positioning seat, 52 is the first column, 53 is the horizontal frame, 54 is the limiting frame, 55 is the cold air seat, 6 is the grinding device, 61 is the second positioning seat, 62 is the second column, 63 is the grinding frame, 64 is the grinding motor, 65 is the upper grinding roller, 66 is the lower grinding roller, 7 is the main frame, 71 is the DC motor, 72 is the rotating shaft, 73 is the first active roller, and 74 is the second active roller. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] See also Figures 1 to 10The embodiment of the present invention provides a coil welding device that can be automatically pulled, including a working frame 2, a rear welding device 3 and a front welding device 4. The left end of the working frame 2 is provided with a driven frame 1, the rear end of the working frame 2 is provided with a rear welding device 3, the front end of the working frame 2 is provided with a front welding device 4, the middle section of the working frame 2 is provided with a cooling device 5, the right side of the cooling device 5 is provided with a grinding device 6, and the right end of the working frame 2 is provided with an active frame 7. The device uses the working frame 2 as a plurality of groups of coils to successively and continuously connect the elbows and the front ends with the rear ends. The welding process of the connecting elbow is carried out, and the coil weld is cooled and polished to improve the quality of the coil welding. The staff pushes the coil to be welded from the left end frame of the working frame 2 to the operating position of the rear welding device 3, and the rear welding device 3 welds the connecting elbow at the rear end of the coil, and then pushes the coil forward, and the front welding device 4 welds the connecting elbow at the front end of the coil. The welded coil is pushed backward to the working frame 2 for continuous operation, completes the cooling and polishing processes, and then is taken out from the right end frame of the working frame 2.

[0034] See also Figure 2 The rear welding device 3 includes two groups of rear fixing frames 31, the inner sides of the two groups of rear fixing frames 31 are respectively provided with first upright frames 32, a first welding adjustment seat 33 is provided between the two groups of first upright frames 32, a first setting seat 34 is provided at the bottom of the first welding adjustment seat 33, a plurality of groups of first upper welding guns 35 are evenly arranged on the front panel of the first setting seat 34, and a group of first lower welding guns 36 are respectively provided under each group of first upper welding guns 35, a first push plate 37 is provided on the rear fixing frame 31, and a group of first cylinders 38 are respectively provided on the rear end surface of the rear fixing frame 31, and the rear end frame of the working frame 2 fixes the two groups of rear fixing frames 31, the rear fixing frame 31 establishes the installation of the two groups of first upright frames 32, uses the first welding adjustment seat 33 to fix the installation of the first setting seat 34, and provides a control circuit and a heating power supply circuit for the first upper welding gun 35 and the first lower welding gun 36. Each group of correspondingly arranged first upper welding guns 35 and first lower welding guns 36 simultaneously perform a welding process of aligning the rear end of a tube body of the coil and the connection between the elbow up and down. The set welding gun group corresponds to the number of single-tube welding settings of the coil, and can realize welding processing of multiple groups of coil elbows at the same time, effectively improving its welding speed and accelerating the work efficiency of the operation.

[0035] A first push plate 37 is provided on the rear fixed frame 31 to realize the pushing control of the coil. The left and right ends of the rear of the first push plate 37 are synchronously controlled and pushed out by two groups of first cylinders 38, so that the coil with the rear end bend welding completed can be pushed forward, and the front end bend of the coil can be pushed to the position opposite to the front welding device 4, so that the conveying frame can convey the coil to the bottom of the front welding device 4 for welding.

[0036] See also Figure 5The cooling device 5 includes a first positioning seat 51, a group of first columns 52 are respectively provided at the front and rear ends of the first positioning seat 51, a group of transverse frames 53 are respectively provided on the top of the first columns 52, a group of limiting frames 54 are respectively provided on the inner sides of the two groups of transverse frames 53, a group of cold air seats 55 are respectively provided below the two groups of transverse frames 53, and a connecting frame is provided between the two groups of transverse frames 53. The cooling device 5 establishes the setting of the two groups of first columns 52 through the first positioning seat 51, and the setting of the limiting frame 54 and the cold air seat 55 is respectively realized on the top of the first column 52 through the transverse frame 53, so that the cold air seat 55 is arranged opposite to the coil weld, so that the cold air seat 55 can continuously blow cold air to the coil weld, quickly reduce the temperature of the weld, and ensure the firmness of the welding operation. The connecting frame is provided with a connecting structure for the two groups of limiting frames 54 to enhance the structural stability of the cooling device 5.

[0037] See also Figure 6 and Figure 7 The grinding device 6 includes a second positioning seat 61, a group of second columns 62 are respectively provided at the front and rear ends of the second positioning seat 61, a group of grinding frames 63 are respectively provided on the top of the second columns 62, and a group of grinding motors 64 are respectively provided at the left end of the grinding frames 63. A plurality of upper grinding rollers 65 are provided at the upper ends of the inner cavities of the two groups of grinding frames 63, and a group of lower grinding rollers 66 are respectively provided directly below the upper grinding rollers 65. The grinding device 6 establishes the installation of the two groups of second columns 62 by setting the second positioning seat 61, and the top of the second column 62 respectively realizes the installation support of a group of independent grinding frames 63. The two groups of grinding frames 63 are respectively arranged corresponding to the weld positions at the front and rear ends of the coil. During the period when the conveying frame drives the coil to pass through the gaps of the two groups of grinding frames 63, the two groups of grinding motors 64 respectively drive the transmission chain belts connected thereto, and the upper grinding rollers 65 and the lower grinding rollers 66 in the same grinding frame 63 are used to grind the coil weld at the same time, remove the impurity blocks on the weld surface, and improve the aesthetics of the coil welding.

[0038] See also Figure 3The first upper welding gun 35 includes a connecting head 351, a movable end 352 is provided at the front end of the connecting head 351, a connecting rod 353 is provided at the front end of the movable end 352, and a welding pin 354 is provided at the front end of the connecting rod 353. The first upper welding gun 35 is fixedly arranged on the first setting seat 34 through the connecting head 351. The front end of the connecting head 351 fixes the setting of the movable end 352. An arc swing arm is provided in the movable end 352. The control end adjusts the arc swing arm to act on the connecting rod 353 to be close to the right end node of the pipeline, and move to the left along the upper semicircular arc at the connection between the pipeline and the elbow. During this period, the welding needle 354 welds the single tube body of the welding coil and the upper half of the connecting circle of the connecting elbow. The first upper welding gun 35 and the first lower welding gun 36 are symmetrically arranged about the first push plate 37 respectively. During the welding process of the first upper welding gun 35, the first lower welding gun 36 synchronously welds the single tube body of the welding coil and the lower half of the connecting circle of the connecting elbow. Multiple groups of symmetrically arranged welding gun assemblies work simultaneously, and the welds of multiple groups of tube bodies and elbows of the coil can be synchronously processed, effectively improving the welding efficiency at the rear end of the coil.

[0039] See also Figure 4 The front welding device 4 includes two groups of front fixing frames 41, and the inner sides of the two groups of front fixing frames 41 are respectively provided with second vertical frames 42, and the second vertical frames 42 are provided with front welding components, and the front fixing frames 41 are provided with second push plates 43. The front end surfaces of the front fixing frames 41 are respectively provided with a group of second cylinders 44. The two groups of front fixing frames 41 establish a stable connection between the front welding device 4 and the working frame 2. The front fixing frames 41 are provided with second push plates 43 to realize the pushing control of the coil. The left and right ends of the second push plates 43 are respectively pushed out by the two groups of second cylinders 44 to synchronously control the pushing of the coil after the front bending welding is completed. The coil can be pushed backwards, and the coil can be pushed as a whole to the front and rear equally facing positions of the working frame 2, so that the conveying frame can convey the coil to the bottom of the cooling device 5 for blowing and cooling treatment.

[0040] A front fixing frame 41 is set up to establish the setting of two groups of second upright frames 42, and the second upright frames 42 are used to establish the setting of the front welding assembly to realize the welding processing of the front end of the coil and the connecting elbow. A second welding adjustment seat is provided on the top of the second upright frame 42. The second welding adjustment seat and the second setting seat are used to set the second upper welding gun and the second lower welding gun, and control circuits and heating power supply circuits are provided for the second upper welding gun and the second lower welding gun. Each group of correspondingly set second upper welding guns and second lower welding guns simultaneously perform upper and lower docking welding processing on the connection between the front end of a tube body of the coil and the elbow, and synchronously complete the welding processing of the front end tube body of the coil and the connecting elbow. The welding assembly of the front welding device 4 is the same as the setting of the rear welding device 3, which is convenient for the control end to synchronously realize control management and reduce the difficulty of regulation.

[0041] See also Figure 2A first protective cover plate 11 is provided on the top of the driven frame 1, a group of second driven rollers 17 are respectively provided at the front and rear below the first protective cover plate 11, and first driven rollers 16 are respectively provided under the second driven rollers 17. A rear conveying frame 12 is provided at the rear end of the first driven roller 16, and a front conveying frame is provided at the front end of the first driven roller 16. The rear conveying frame 12 and the front conveying frame are respectively arranged on the inner sides of the front and rear ends of the working frame 2, and the front conveying frame and the rear conveying frame 12 are used to move synchronously to realize the transportation and welding operation support of the coil, and the first driven roller 16 is used to cooperate with the second driven roller 17 to realize the regulation of the left end structure of the two groups of conveying frames. On the premise of ensuring the support stability of the two groups of conveying frames, the efficiency regulation of the operation of the two groups of conveying frames is improved.

[0042] The front and rear inner walls of the working frame 2 correspond to the bottom of the frames of the two groups of conveying frames, respectively, and an upper limit frame 13 and a lower limit frame 14 are provided. The front and rear panels of the working frame 2 are provided with four groups of limit frames to realize the support setting of the two parallel frames of the two groups of conveying frames, so as to avoid the deformation of the conveying frames due to the force and its own gravity, and effectively ensure the use effect of the conveying frames. The upper end surfaces of the two groups of conveying frames during operation are higher than the panel setting of the working frame 2, so as to support the coil on the working frame 2 to realize movement.

[0043] The rear conveyor rack 12 is provided with a plurality of sets of coil placement identification racks 15 opposite to the front conveyor rack. The coil placement identification racks 15 can facilitate the staff to directly place the coils at the designated positions without the need for specific adjustment and deviation correction devices, thereby reducing production costs.

[0044] See also Figure 8 and Fig. 9 A DC motor 71 is provided at the bottom of the inner cavity of the active frame 7, and a rotating shaft 72 is provided at the output end of the DC motor 71. The rotating shaft 72 is connected to a first active roller 73 through a belt. A second active roller 74 is provided above the first active roller 73. The DC motor 71 is provided in the inner cavity of the active frame 7 as a power control device for the two groups of conveyor racks. The DC motor 71 drives the first active roller 73 to rotate at the same frequency through the rotating shaft 72 and the belt, that is, the front and rear groups of conveyor racks are pulled to move in the same amplitude and direction. The second active roller 74 cooperates with the first active roller 73 to establish transmission control and support adjustment for the right end edges of the two groups of conveyor racks, and the running speed of the two groups of conveyor racks can be adjusted.

[0045] A second protective cover is provided on the panel of the active frame 7, and a control panel is provided on the second protective cover. The second protective panel protects the connecting components at the right end of the conveyor frame and provides setting space for the control panel and the control circuit. The parameters of each working component are set on the control panel, so that the device can complete the coil welding operation accurately and efficiently.

[0046] See also Fig.10The first active roller 73 is provided with a first transmission gear at both ends, and the second active roller 74 is provided with a second transmission gear at both ends. The upper and lower end surfaces of the front and rear two groups of conveying racks are provided with teeth and grooves that are compatible with the transmission gears. The teeth and grooves on the upper end surface of the conveying rack can enhance the friction performance of its end surface and enhance the stability of the coil placement. The teeth and grooves on the lower end surface of the conveying rack establish contact with the transmission gear.

[0047] Independent transmission gears are respectively provided at the connection between the two groups of driven rollers and the conveying frame. The first active roller 73 is subjected to force to drive the two groups of conveying frames to move. The contact between the conveying frame and the transmission gear is utilized to drive the second active roller 74, the first driven roller 16 and the second driven roller 17 to rotate at the same amplitude, thereby realizing the adjustment and support of the smooth operation of the conveying frame.

[0048] The embodiment of the present invention provides an automatically towed coil welding device. The worker places the coil and bent pipe assembly to be welded in the first group of coil placement identification racks 15 at the left end of the working frame 2, pushes the coil to the bottom of the rear welding device 3, and welds the single tube body and the connecting bent pipe by the first upper welding gun 35 and the first lower welding gun 36. Then, the first cylinder 38 acts on the first push plate 37 to push the coil out. The conveying rack continues to run and moves the coil to the bottom of the front welding device 4. The second upper welding gun and the second lower welding gun weld the single tube body and the connecting bent pipe. Then, the second cylinder 44 acts on the second push plate 43 to push the coil out. The conveying rack continues to run and cools and grinds the coil in turn, thereby completing the welding and grinding of the coil, effectively reducing the labor cost of coil welding and improving the efficiency of coil welding.

[0049] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A coil welding device capable of automatic traction, characterized in that: The invention comprises a working frame (2), a rear welding device (3) and a front welding device (4), wherein a driven frame (1) is arranged at the left end of the working frame (2), a rear welding device (3) is arranged behind the left end of the working frame (2), a front welding device (4) is arranged in front of the working frame (2), a cooling device (5) is arranged in the middle section of the working frame (2), a grinding device (6) is arranged on the right side of the cooling device (5), and an active frame (7) is arranged at the right end of the working frame (2); The rear welding device (3) comprises two groups of rear fixing frames (31), the inner sides of the two groups of rear fixing frames (31) are respectively provided with first upright frames (32), a first welding adjustment seat (33) is provided between the two groups of first upright frames (32), a first setting seat (34) is provided at the bottom of the first welding adjustment seat (33), a plurality of groups of first upper welding guns (35) are evenly arranged on the front panel of the first setting seat (34), a group of first lower welding guns (36) is respectively provided below each group of first upper welding guns (35), a first push plate (37) is provided on the rear fixing frame (31), and a group of first cylinders (38) are respectively provided on the rear end surface of the rear fixing frame (31); The cooling device (5) comprises a first positioning seat (51), a group of first columns (52) are respectively provided at the front and rear ends of the first positioning seat (51), a group of transverse frames (53) are respectively provided on the top of the first columns (52), a group of limiting frames (54) are respectively provided on the inner side of the two groups of transverse frames (53), a group of cold air seats (55) are respectively provided under the two groups of transverse frames (53), and a connecting frame is provided between the two groups of transverse frames (53); The grinding device (6) comprises a second positioning seat (61), a group of second columns (62) are respectively provided at the front and rear ends of the second positioning seat (61), a group of grinding frames (63) are respectively provided on the top of the second columns (62), a group of grinding motors (64) are respectively provided at the left ends of the grinding frames (63), a plurality of upper grinding rollers (65) are respectively provided at the upper ends of the inner cavities of the two groups of grinding frames (63), and a group of lower grinding rollers (66) are respectively provided directly below the upper grinding rollers (65).

2. The automatic traction coil welding device according to claim 1 is characterized in that: The first upper welding gun (35) comprises a connecting head (351), a movable end head (352) is provided at the front end of the connecting head (351), a connecting rod (353) is provided at the front end of the movable end head (352), and a welding needle (354) is provided at the front end of the connecting rod (353).

3. The automatic traction coil welding device according to claim 1, characterized in that: The front welding device (4) comprises two groups of front fixing frames (41), the inner sides of the two groups of front fixing frames (41) are respectively provided with second vertical frames (42), the second vertical frames (42) are provided with front welding components, the front fixing frames (41) are provided with second push plates (43), and the front end surfaces of the front fixing frames (41) are respectively provided with a group of second cylinders (44).

4. The automatic traction coil welding device according to claim 1, characterized in that: A first protective cover plate (11) is provided on the top of the driven frame (1), a group of second driven rollers (17) are provided at the front and rear of the first protective cover plate (11), a first driven roller (16) is provided at the bottom of the second driven roller (17), a rear conveying frame (12) is provided at the rear end of the first driven roller (16), and a front conveying frame is provided at the front end of the first driven roller (16).

5. The automatic traction coil welding device according to claim 4, characterized in that: The front and rear inner walls of the working frame (2) are respectively provided with an upper limit frame (13) and a lower limit frame (14) at the bottom of the frame bodies corresponding to the two groups of conveying frames.

6. The automatic traction coil welding device according to claim 4, characterized in that: The rear conveying rack (12) and the front conveying rack are provided with a plurality of groups of coil placement identification racks (15) opposite to each other.

7. The automatic traction coil welding device according to claim 1, characterized in that: A DC motor (71) is provided at the bottom of the inner cavity of the active frame (7); a rotating shaft (72) is provided at the output end of the DC motor (71); the rotating shaft (72) is connected to a first active roller (73) via a belt; and a second active roller (74) is provided above the first active roller (73).

8. The automatic towing coil welding device according to claim 7, characterized in that: The first active roller (73) is provided with a first transmission gear at both ends, and the second active roller (74) is provided with a second transmission gear at both ends.

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