Automatic welding device for container lock rod

Abstract

The invention discloses a container lock rod automatic welding device which comprises a control unit, a rack, two bearing plates and two strip-shaped rails, a plurality of rod driving mechanisms are installed at the strip-shaped rails, the welding device is provided with a storage position and a first working position, each bearing plate is provided with a plurality of arc-shaped grooves in the storage position, and the arc-shaped grooves are arranged in the first working position. Each bearing plate is provided with an arc-shaped groove at the first working position; the first working station is provided with two ring storage units, two ring feeding units and two spot welding units. According to the welding device, automatic welding of the lock rod can be achieved, manual participation is little, the production efficiency is greatly improved, and the welding device is suitable for automatic production of large-scale container lock rods. Through the strip-shaped rail and the rod driving mechanism, stable movement of the rod body of the lock rod is achieved, the pressure sensing mechanism is arranged at the arc-shaped groove, the rod body can be detected in real time, and therefore the welding quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of container lock rod welding, and more specifically, to an automatic welding device for container lock rods. Background Art

[0002] With the continuous development of global trade, container transportation has become one of the main ways of international logistics. The container lock rod is a mechanism used to help lock the container door, and plays an important role in ensuring the safety of goods during long-distance transportation.

[0003] The container lock rod mainly consists of a rod body, a handle seat, two first positioning rings, two second positioning rings and two lock heads. During the welding operation, it is necessary to weld the handle seat, two first positioning rings, two second positioning rings and two lock heads to the rod body. Due to the large number of welding positions and the different welding positions of each component, a large amount of manual operation is required, making it difficult to perform automatic welding, increasing the welding difficulty and resulting in low work efficiency. Summary of the Invention

[0004] The present invention aims to overcome the defects of the prior art and provides an automatic welding device for container lock rods.

[0005] To achieve the above object, the present invention provides the following technical solution: A welding device includes a control unit, a frame, two bearing plates and two strip-shaped rails. A plurality of rod driving mechanisms are installed on the strip-shaped rails. The rod driving mechanism includes a moving mechanism and an inverted U-shaped frame connected to the moving mechanism through a first electric lifting rod; the welding device has a storage position and a first working position. Each bearing plate has a plurality of arc-shaped grooves at the storage position and one arc-shaped groove at the first working position; the first working position has two ring storage units, two upper ring units and two spot welding units.

[0006] Further, the welding device has a second working position, and each bearing plate has one arc-shaped groove at the second working position.

[0007] Further, the welding device has a third working position, and each bearing plate has one arc-shaped groove at the third working position.

[0008] Further, the welding device has a fourth working position, and each bearing plate has one arc-shaped groove at the fourth working position.

[0009] Further, the second working position has a handle seat feeding unit, two handle seat welding units, two ring storage units, two upper ring units, two spot welding units and two limit plates, and the limit plates have arc-shaped grooves.

[0010] Further, the third working position has two lock head feeding units, two lock head positioning units and two spot welding units.

[0011] Further, the fourth working position includes two sets of welding mechanisms and two rotary drive mechanisms.

[0012] Further, the moving mechanism can translate along the strip rail.

[0013] Further, a rack is fixed at the strip rail. The moving mechanism includes a sliding seat, a gear engaged with the rack, and a gear drive mechanism for driving the gear. The sliding seat is provided with a track groove for mating with the strip rail.

[0014] Further, the moving mechanism further includes a walking wheel set capable of clamping the strip rail.

[0015] Thus, the moving mechanism moves more stably.

[0016] Further, a receiving container is further included. The receiving container is located below the downstream ends of the two bearing plates.

[0017] Thus, the receiving container can be used to receive the lock rods that have been welded.

[0018] Further, the lock rod includes a rod body, a handle seat, two first positioning rings, two second positioning rings, and two lock heads.

[0019] Further, the inverted U-shaped frame can be lowered under the drive of the first electric lifting rod so that the rod body of the lock rod is located between the inverted U-shaped frames and is driven by the inverted U-shaped frames to move along the bearing plate.

[0020] Further, the radius corresponding to the arc-shaped groove is equal to the radius of the rod body of the lock rod.

[0021] Thus, the arc-shaped groove can better accommodate and position the rod body of the lock rod.

[0022] Further, the rod body is cylindrical, and both the first positioning ring and the second positioning ring are circular rings.

[0023] Further, the number of rod part drive mechanisms at each strip rail is greater than or equal to two.

[0024] Further, the number of rod part drive mechanisms at each strip rail is four.

[0025] Further, the ring storage unit includes an end plate and a guide rod. A first pressure sensor is provided at the end plate; a plurality of first positioning rings are sleeved on the guide rod at the first working position, and a first electric telescopic rod is further connected to the end plate at the first working position.

[0026] Further, the upper ring unit includes a first electric push rod, a first translation seat, a finger cylinder, a lifting plate connected to the first translation seat through a second electric lifting rod, and two abutting plates, and the spot welding unit includes a third electric lifting rod and a first welding machine.

[0027] Further, a plurality of second positioning rings are sleeved on the guide rod at the second working position.

[0028] Further, the handle seat feeding unit includes a first lifting mechanism and a first storage box connected to the first lifting mechanism through a first connecting frame. Both sides of the first storage box have first through holes. First L-shaped plates are connected to both sides of the first storage box, and first clamping blocks are connected to the first L-shaped plates through first telescopic cylinders; the handle seat welding unit includes a second translation seat, a second electric push rod, and a second welding machine connected to the second translation seat through a second electric telescopic rod.

[0029] Further, the guide rod is fixed to the end plate.

[0030] Further, a plurality of first positioning rings are sleeved on the guide rod of the ring storage unit at the first working position.

[0031] Further, a plurality of second positioning rings are sleeved on the guide rod of the ring storage unit at the second working position.

[0032] Further, a first electric telescopic rod is further connected to the end plate of the ring storage unit at the first working position.

[0033] Further, the first translation seat is driven by the first electric push rod, the finger cylinder is installed at the first translation seat, and the abutting plate is fixed to the lifting plate.

[0034] Further, the first welding machine is driven by the third electric lifting rod.

[0035] Further, both the top and bottom of the first storage box are open.

[0036] Further, the first clamping block is inserted into the first through hole.

[0037] Further, a plurality of handle seats are accommodated in the first storage box.

[0038] Further, the second electric push rod is used to drive the second translation seat.

[0039] Thus, the second welding machine can weld and fix the handle seat and the rod body from both sides of the handle seat.

[0040] Further, the first electric telescopic rod is fixed to the frame.

[0041] In some embodiments, a guide post is further connected to the end plate of the first working position, and a guide sleeve cooperating with the guide post is installed on the frame.

[0042] Thus, the translation of the guide rod at the first working position is more stable.

[0043] Further, the end plate of the storage ring unit at the second working position is fixed to the frame.

[0044] Further, the lock head feeding unit includes a second lifting mechanism, a second storage bin connected to the second lifting mechanism through a second connecting frame. The two sides of the second storage bin have second through holes, and both sides of the second storage bin are connected with second L-shaped plates. The second L-shaped plates are connected with second clamping blocks through second telescopic cylinders; the lock head positioning unit includes a third lifting mechanism and a positioning seat, and the positioning seat has a positioning groove for cooperating with the lock head.

[0045] Further, the welding mechanism includes a fourth electric lifting rod, a first positioning ring welding machine, a fifth electric lifting rod, a second positioning ring welding machine, a sixth electric lifting rod, and a lock head welding machine; the rotary driving mechanism includes an upper lifting mechanism, a pressing wheel unit driven by the upper lifting mechanism to lift, a lower lifting mechanism, and a driving wheel unit driven by the lower lifting mechanism to lift.

[0046] Further, the top and bottom of the second storage bin are both open.

[0047] Further, the second clamping block is inserted into the second through hole.

[0048] Further, a plurality of lock heads are accommodated in the second storage bin.

[0049] Further, the positioning seat is driven by the third lifting mechanism.

[0050] Further, the first positioning ring welding machine is driven by the fourth electric lifting rod, the second positioning ring welding machine is driven by the fifth electric lifting rod, and the lock head welding machine is driven by the sixth electric lifting rod.

[0051] Further, the pressing wheel unit includes two pressing wheels.

[0052] Further, the driving wheel unit includes two driving wheels and a driving wheel driving mechanism for driving the two driving wheels to rotate.

[0053] Further, the first positioning ring welding machine, the second positioning ring welding machine, and the lock head welding machine are all arc welding machines or plasma welding machines.

[0054] Further, the first welding machine and the second welding machine are both arc welding machines or plasma welding machines.

[0055] Further, the first lifting mechanism, the second lifting mechanism, the third lifting mechanism, the upper lifting mechanism, and the lower lifting mechanism are all installed on the frame.

[0056] Further, the first lifting mechanism, the second lifting mechanism, the third lifting mechanism, the upper lifting mechanism and the lower lifting mechanism are all electric telescopic rods.

[0057] Further, the multiple handle seats in the first storage box are arranged in a row.

[0058] Further, the multiple lock heads in the second storage box are arranged in a row.

[0059] Further, there are two vertical limiting protrusions in the second storage box that cooperate with the lock heads.

[0060] Thus, the multiple handle seats can descend in the first storage box under the action of gravity and can be loaded from the top of the first storage box; the multiple lock heads can descend in the second storage box under the action of gravity and can be loaded from the top of the second storage box.

[0061] Further, the outer side of the bearing plate can abut against the first positioning ring, and the outer side of the limiting plate can abut against the second positioning ring.

[0062] Further, the limiting plate includes two arc-shaped plates and a straight plate connecting the two arc-shaped plates.

[0063] Thus, the arrangement of the arc-shaped plates at both ends makes it easier for the rod body of the lock rod to pass through the limiting plate.

[0064] Further, the first electric push rod is installed on the frame.

[0065] Further, the first translation seat has a first chute, and the upper ring unit further includes a first slide rail that cooperates with the first chute.

[0066] Further, the second electric push rod is installed on the frame.

[0067] Further, the second translation seat has a second chute, and the handle seat welding unit further includes a second slide rail that cooperates with the second chute.

[0068] Further, the first slide rail is installed on the frame; the second slide rail is installed on the frame.

[0069] Further, there is an installation blind hole at each arc-shaped groove, and a pressure sensing mechanism is installed at the installation blind hole. The pressure sensing mechanism includes a second pressure sensor, a pressing plate that can press the second pressure sensor, and a movable block connected to the pressing plate by a spring. The end of the movable block is hemispherical.

[0070] Further, the end of the movable block can be pressed by the rod body of the lock rod.

[0071] Thus, it can be sensed whether there is a lock rod at the arc-shaped groove.

[0072] Furthermore, the multiple arc-shaped grooves of the bearing plate located at the material storage position are arranged in a row at equal intervals.

[0073] Furthermore, the spot welding units at the first working position and the second working position are both located above the working lock rod, and the spot welding unit at the third working position is located below the working lock rod.

[0074] Beneficial effects:

[0075] 1. The welding device of the present application can realize the automatic welding of the lock rod, with less manual participation, greatly improving the production efficiency and being suitable for the automatic production of large-scale container lock rods.

[0076] 2. The welding device of the present application realizes the stable movement of the rod body of the lock rod through the strip rail and the rod part driving mechanism, and a pressure sensing mechanism is arranged at the arc-shaped groove, which can detect the rod body in real time, thus ensuring the welding quality. Description of the drawings

[0077] Figure 1 is a schematic diagram of the first perspective of the welding device;

[0078] Figure 2 is an enlarged view of area A;

[0079] Figure 3 is an enlarged view of area B;

[0080] Figure 4 is an enlarged view of area C;

[0081] Figure 5 is an enlarged view of area D;

[0082] Figure 6 is an enlarged view of area E;

[0083] Figure 7 is a schematic diagram of the second perspective of the welding device;

[0084] Figure 8 is an enlarged view of area F;

[0085] Figure 9 is an enlarged view of area G;

[0086] Figure 10 is a schematic diagram of the third perspective of the welding device;

[0087] Figure 11 is an enlarged view of area H;

[0088] Figure 12 is an enlarged view of area I;

[0089] Figure 13 is an enlarged view of area J;

[0090] Figure 14 It is an enlarged view of area K;

[0091] Figure 15 It is an enlarged view of area L;

[0092] For the convenience of illustration, the position of one of the arc-shaped grooves of the carrier plate is sectionally cut in the figure.

[0093] Explanation of reference numerals in the drawings: carrier plate 1; arc-shaped groove 1.1; mounting blind hole 1.2; strip rail 2; moving mechanism 3.1; first electric lifting rod 3.2; inverted U-shaped frame 3.3; end plate 4.1; guide rod 4.2; first positioning ring 4.3; second positioning ring 4.4; first electric telescopic rod 4.5; first electric push rod 5.1; first translation seat 5.2; finger cylinder 5.3; second electric lifting rod 5.4; lifting plate 5.5; abutting plate 5.6; first slide rail 5.7; third electric lifting rod 6.1; first welding machine 6.2; first lifting mechanism 7.1; first connecting frame 7.2; first storage bin 7.3; first L-shaped plate 7.4; first telescopic cylinder 7.5; first clamping block 7.6; second translation seat 8.1; second electric push rod 8.2; second electric telescopic rod 8.3; second welding machine 8.4; second slide rail 8.5; limiting plate 9; second lifting mechanism 10.1; second connecting frame 10.2; second storage bin 10.3; second L-shaped plate 10.4; second telescopic cylinder 10.5; third lifting mechanism 11.1; positioning seat 11.2; fourth electric lifting rod 12.1; first positioning ring welding machine 12.2; fifth electric lifting rod 12.3; second positioning ring welding machine 12.4; sixth electric lifting rod 12.5; lock head welding machine 12.6; upper lifting mechanism 13.1; abutting wheel unit 13.2; lower lifting mechanism 13.3; driving wheel unit 13.4; rod body 14; handle seat 15; lock head 16; second pressure sensor 17.1; pressing plate 17.2; spring 17.3; movable block 17.4. Detailed implementation manners

[0094] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0095] The present invention provides an automatic welding device for container lock rods as shown in the figure, which includes a control unit, a frame, two bearing plates 1 and two strip rails 2. A plurality of rod driving mechanisms are installed at the strip rails 2. The rod driving mechanism includes a moving mechanism 3.1 capable of translating along the strip rail 2 and an inverted U-shaped frame 3.3 connected to the moving mechanism 3.1 through a first electric lifting rod 3.2. The welding device has a storage position, a first working position, a second working position, a third working position and a fourth working position. Each bearing plate 1 has a plurality of arc-shaped grooves 1.1 at the storage position, and each bearing plate 1 has an arc-shaped groove 1.1 at the first working position, the second working position, the third working position and the fourth working position respectively. The first working position has two ring storage units, two ring loading units and two spot welding units. The second working position has a handle seat feeding unit, two handle seat welding units, two ring storage units, two ring loading units, two spot welding units and two limit plates 9. The limit plates 9 have arc-shaped grooves. The third working position has two lock head feeding units, two lock head positioning units and two spot welding units. The fourth working position includes two groups of welding mechanisms and two rotation driving mechanisms. The ring storage unit includes an end plate 4.1 and a guide rod 4.2 fixed to the end plate 4.1. A first pressure sensor is provided at the end plate 4.1. A plurality of first positioning rings 4.3 are sleeved on the guide rod 4.2 of the ring storage unit at the first working position, and a plurality of second positioning rings 4.4 are sleeved on the guide rod 4.2 of the ring storage unit at the second working position. The end plate 4.1 of the ring storage unit at the first working position is further connected to a first electric telescopic rod 4.5. The ring loading unit includes a first electric push rod 5.1, a first translation seat 5.2 driven by the first electric push rod 5.1, a finger cylinder 5.3 installed at the first translation seat 5.2, a lifting plate 5.5 connected to the first translation seat 5.2 through a second electric lifting rod 5.4, and two abutting plates 5.6 fixed to the lifting plate 5.5. The spot welding unit includes a third electric lifting rod 6.1 and a first welding machine 6.2 driven by the third electric lifting rod 6.1. The handle seat feeding unit includes a first lifting mechanism 7.1 and a first storage box 7.3 with open top and bottom connected to the first lifting mechanism 7.1 through a first connecting frame 7.2. The two sides of the first storage box 7.3 have first through holes. Both sides of the first storage box 7.3 are connected with first L-shaped plates 7.4. The first L-shaped plates 7.4 are connected with first clamping blocks 7.6 inserted into the first through holes through first telescopic cylinders 7.5. A plurality of handle seats 15 are accommodated in the first storage box 7.3. The handle seat welding unit includes a second translation seat 8.1, a second electric push rod 8.2 driving the second translation seat 8.1 and a second welding machine 8.4 connected to the second translation seat 8.1 through a second electric telescopic rod 8.3.The lock head feeding unit includes a second lifting mechanism 10.1, a second storage box 10.3 with open top and bottom connected to the second lifting mechanism 10.1 through a second connecting frame 10.2. The two sides of the second storage box 10.3 have second through holes. Both sides of the second storage box 10.3 are connected with second L-shaped plates 10.4. The second L-shaped plates 10.4 are connected with second clamping blocks inserted into the second through holes through second telescopic cylinders 10.5. A plurality of lock heads 16 are accommodated in the second storage box 10.3. The lock head positioning unit includes a third lifting mechanism 11.1 and a positioning seat 11.2 driven by the third lifting mechanism 11.1. The positioning seat 11.2 has a positioning groove cooperating with the lock head 16. The welding mechanism includes a fourth electric lifting rod 12.1, a first positioning ring welding machine 12.2 driven by the fourth electric lifting rod 12.1, a fifth electric lifting rod 12.3, a second positioning ring welding machine 12.4 driven by the fifth electric lifting rod 12.3, a sixth electric lifting rod 12.5, and a lock head welding machine 12.6 driven by the sixth electric lifting rod 12.5. The rotation driving mechanism includes an upper lifting mechanism 13.1, a pressing wheel unit 13.2 driven by the upper lifting mechanism 13.1 to lift and lower, a lower lifting mechanism 13.3, and a driving wheel unit 13.4 driven by the lower lifting mechanism 13.3 to lift and lower.

[0096] The pressing wheel unit 13.2 includes two pressing wheels; the driving wheel unit 13.4 includes two driving wheels and a driving wheel driving mechanism for driving the two driving wheels to rotate. The first lifting mechanism 7.1, the second lifting mechanism 10.1, the third lifting mechanism 11.1, the upper lifting mechanism 13.1 and the lower lifting mechanism 13.3 are all installed on the frame; the first lifting mechanism 7.1, the second lifting mechanism 10.1, the third lifting mechanism 11.1, the upper lifting mechanism 13.1 and the lower lifting mechanism 13.3 are all electric telescopic rods. A plurality of handle seats 15 in the first storage box 7.3 are distributed in a row; a plurality of lock heads 16 in the second storage box 10.3 are distributed in a row; there are two vertical limiting protrusions in the second storage box 10.3 that cooperate with the lock heads 16. The outer side of the bearing plate 1 can abut against the first positioning ring 4.3, and the outer side of the limiting plate 9 can abut against the second positioning ring 4.4; the limiting plate 9 includes two arc-shaped plates and a straight plate connecting the two arc-shaped plates. The first electric push rod 5.1 is installed on the frame; the first translation seat 5.2 has a first chute, and the upper ring unit further includes a first slide rail 5.7 that cooperates with the first chute; the second electric push rod 8.2 is installed on the frame; the second translation seat 8.1 has a second chute, and the handle seat welding unit further includes a second slide rail 8.5 that cooperates with the second chute. Each arc-shaped groove 1.1 has a mounting blind hole 1.2, and a pressure sensing mechanism is installed at the mounting blind hole. The pressure sensing mechanism includes a second pressure sensor 17.1, a pressing plate 17.2 that can press the second pressure sensor 17.1, and a movable block 17.4 connected to the pressing plate 17.2 through a spring 17.3. The end of the movable block 17.4 is hemispherical. The arc-shaped grooves 1.1 of the bearing plate 1 located at the storage position are distributed in a row at equal intervals; the spot welding units at the first working position and the second working position are both located above the lock rod to be worked, and the spot welding unit at the third working position is located below the lock rod to be worked.

[0097] Working principle: The lock rod welding device of the present application, as shown in the figure, the lock rod of the container door includes a rod body, two first positioning rings, two second positioning rings and two lock heads. During use, the worker only needs to place the rod body in each arc-shaped groove of the storage position, place the handle seat in the first storage box, and place the lock head in the second storage box. Under the action of the rod driving mechanism, the inverted U-shaped frame can descend, so that the rod body is located within the two inverted U-shaped frames, and can drive the rod body to move along the bearing plate under the drive of the moving mechanism. And when the rod body moves from one arc-shaped groove to the next arc-shaped groove, since there is a second pressure sensor at the arc-shaped groove, the position of the rod body can be accurately sensed. When the rod body moves from the storage position to the first working position, there will be a deviation in the position of the rod body in the direction perpendicular to the bearing plate at this time. However, since the first electric telescopic rods corresponding to the two guide rods are in a shortened state at this time, the ends of the two guide rods at the first working position are farther apart (greater than the length of the rod body to ensure that the rod body is located between the two guide rods). Then the two first electric telescopic rods extend, and the two guide rods hold the rod body from both ends, so that the rod body is accurately positioned in the direction perpendicular to the bearing plate. And the upper ring unit can move towards the end plate when the abutting plate is in the raised state until the pressure value of the first pressure sensor reaches the set threshold (indicating that all the first positioning rings at the guide rod are in contact with each other and the first positioning ring at the end abuts the end plate). At this time, the finger cylinder clamps a first positioning ring (the second electric lifting rod descends), and slews it onto the rod body. And due to the limitation of the bearing plate, the first positioning ring is fed to the corresponding position abutting the rod body, and is spot welded by the spot welding unit to fix the first positioning ring to the rod body. Then the first translation seat retracts.

[0098] After that, under the drive of the rod driving mechanism, the rod body moves to the second working position. At this time, due to the limitation between the two first positioning rings and the bearing plate, the distance of the rod body in the direction perpendicular to the bearing plate is accurate. Using the same principle, the second positioning ring is slewed onto the rod body and spot welded and fixed. And at this time, the first storage box descends, and the first clamping block at the first storage box loosens, so that the handle seat at the bottommost end falls to abut the rod body (and there is still a part of the top end of the handle seat at the bottommost end located in the first storage box, so the position of the handle seat is fixed; the first clamping block clamps again, and at this time the first clamping block just clamps the penultimate handle seat), and the handle seat welding unit welds between the handle seat and the rod body. After the welding is completed, the second storage box rises.

[0099] Then, under the drive of the rod driving mechanism, the rod body moves to the third working position. At this time, using the same principle as the first storage box, the second storage box descends, and the second clamping block loosens (after loosening and then clamping, so the next clamping is to clamp the penultimate lock head), and the lock head just falls into the positioning seat. The spot welding unit is used to spot weld and fix the lock head and the end of the rod body. After the spot welding is completed, the positioning seat descends, and the second storage box rises.

[0100] Next, driven by the rod driving mechanism, the rod body moves to the fourth working position. At this time, under the action of the upper lifting mechanism and the lower lifting mechanism, the rod body rises away from the bearing plate, and the abutting wheel unit and the driving wheel unit can drive the rod body to rotate. At this time, since the first positioning ring, the second positioning ring and the lock head are all spot-welded and fixed, they will rotate synchronously with the rod body, and the welding mechanism is used to perform circular welding on the first positioning ring, the second positioning ring and the lock head. After the welding is completed, the rod body is lowered and still located in the arc-shaped groove of the bearing plate.

[0101] Next, driven by the rod driving mechanism, the rod body can fall from the bearing plate and fall into the receiving container.

[0102] Although the present invention has been illustrated and described with respect to the preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention as long as they do not exceed the scope defined by the claims of the present invention.

Claims

1. An automatic welding device for container lock rods, characterized in that: It includes a control unit, a frame, two bearing plates and two bar rails, a plurality of rod driving mechanisms are installed on the bar rails, the rod driving mechanism includes a moving mechanism and an inverted U-shaped frame connected to the moving mechanism through a first electric lifting rod; the welding device has a storage position, a first working position, a second working position, a third working position and a fourth working position, each bearing plate has a plurality of arc grooves at the storage position, and has an arc groove in the first working position, the second working position, the third working position and the fourth working position respectively; the first working position has two storage ring units, two upper ring units and two spot welding units; the second working position has a handle seat feeding unit, two handle seat welding units, two storage ring units, two upper ring units, two spot welding units and two limit plates, and the limit plates have arc grooves; the third working position has two lock feeding units, two lock positioning units and two spot welding units; the fourth working position includes two groups of welding mechanisms and two rotating driving mechanisms.

2. The automatic welding device for container lock rod according to claim 1, characterized in that: The storage ring unit includes an end plate and a guide rod, and a first pressure sensor is provided at the end plate; a plurality of first positioning rings are sleeved on the guide rod of the first working position, and a plurality of second positioning rings are sleeved on the guide rod of the second working position, and the end plate at the first working position is also connected to a first electric telescopic rod; the upper ring unit includes a first electric push rod, a first translation seat, a finger cylinder, a lifting plate connected to the first translation seat through a second electric lifting rod, and two abutment plates, and the spot welding unit includes a third electric lifting rod and a first welder; the handle seat feeding unit includes a first lifting mechanism and a first storage box connected to the first lifting mechanism through a first connecting frame, the first storage box has first through holes on both sides, and the first storage box is connected to a first L-shaped plate on both sides, and the first L-shaped plate is connected to a first clamping block through a first telescopic cylinder; the handle seat welding unit includes a second translation seat, a second electric push rod, and a second welder connected to the second translation seat through a second electric telescopic rod.

3. The container lock rod automatic welding device according to claim 1, characterized in that: The lock feeding unit includes a second lifting mechanism, a second storage box connected to the second lifting mechanism through a second connecting frame, the second storage box has second through holes on both sides, the second storage box is connected to a second L-shaped plate on both sides, and the second L-shaped plate is connected to a second clamping block through a second telescopic cylinder; the lock positioning unit includes a third lifting mechanism and a positioning seat, the positioning seat has a positioning groove matching the lock; the welding mechanism includes a fourth electric lifting rod, a first positioning ring welder, a fifth electric lifting rod, a second positioning ring welder, a sixth electric lifting rod and a lock welder; the rotating drive mechanism includes an upper lifting mechanism, a clamping wheel unit driven to lift and lower by the upper lifting mechanism, a lower lifting mechanism, and a driving wheel unit driven to lift and lower by the lower lifting mechanism.

4. The automatic welding device for container lock rods according to claim 3 is characterized in that: The clamping wheel unit includes two clamping wheels; the driving wheel unit includes two driving wheels and a driving wheel driving mechanism for driving the two driving wheels to rotate; the first positioning ring welder, the second positioning ring welder and the locking head welder are all arc welding machines or plasma welding machines; the first welding machine and the second welding machine are both arc welding machines or plasma welding machines.

5. The automatic welding device for container lock rod according to claim 3 is characterized in that: The first lifting mechanism, the second lifting mechanism, the third lifting mechanism, the upper lifting mechanism and the lower lifting mechanism are all installed on the frame; the first lifting mechanism, the second lifting mechanism, the third lifting mechanism, the upper lifting mechanism and the lower lifting mechanism are all electric telescopic rods.

6. The automatic welding device for container lock rod according to claim 3, characterized in that: The plurality of handle seats in the first material storage box are distributed in a row; the plurality of lock heads in the second material storage box are distributed in a row; and the second material storage box is provided with two vertical limit protrusions cooperating with the lock heads.

7. The automatic welding device for container lock rod according to claim 3, characterized in that: The outer side of the bearing plate can abut against the first positioning ring, and the outer side of the limiting plate can abut against the second positioning ring; the limiting plate includes two arc-shaped plates and a straight plate connecting the two arc-shaped plates.

8. The automatic welding device for container lock rods according to claim 3 is characterized in that: The first electric push rod is installed on the frame; the first translation seat has a first slide groove, and the upper ring unit also includes a first slide rail that cooperates with the first slide groove; the second electric push rod is installed on the frame; the second translation seat has a second slide groove, and the handle seat welding unit also includes a second slide rail that cooperates with the second slide groove.

9. The automatic welding device for container lock rods according to claim 3, characterized in that: Each arc-shaped groove has a mounting blind hole, and a pressure sensing mechanism is installed at the mounting blind hole. The pressure sensing mechanism includes a second pressure sensor, a pressure plate capable of pressing the second pressure sensor, and a movable block connected to the pressure plate through a spring, and the end of the movable block is hemispherical.

10. The automatic welding device for container lock rods according to claim 3, characterized in that: The multiple arc grooves of the carrying plate at the storage position are distributed in a row with equal spacing; the spot welding units of the first working position and the second working position are both located above the worked locking rod, and the spot welding unit of the third working position is located below the worked locking rod.

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