A steel strip welding machine

Abstract

The present application relates to welding device technical field, specifically to a kind of steel strip welding machine, comprising: feeding unit, it includes the feeding part for active pinch steel strip, and the first translation module for the feeding part translation along the direction of steel strip advancement;Rolling unit, it is located in the output side of feeding part, including rotationally arranged rotating arm, set on the rolling clamping mechanism for clamping steel strip led out by feeding part in rotating arm, and the power element for driving rotating arm circumferential rotation;Welding unit, it is located in the opposite side of feeding unit, including welding torch, and the second translation module for driving welding torch moves along the direction perpendicular to steel strip advancement;Along the direction of advancement of first translation module, the welding torch is located in the steel strip leading-out side of rolling clamping mechanism;And the welding torch is located above steel strip to carry out welding above the joint of steel strip.The present application can realize the rolling and welding processing of steel strip, compared with traditional manual processing mode, improve work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding device, in particular to a steel strip welding machine. BACKGROUND

[0002] The special steel flat strip is a kind of steel strip with a large width-thickness ratio, usually with a thickness of 1-5 mm and a width of 5-50 mm, and a rectangular cross section. The special steel flat strip is an important raw material for automobile industry: a special steel flat strip is connected at the head and tail to form a roll, which can be used as a pressure steel strip in a continuously variable transmission (CVT) to hold the driving wheel and driven wheel tightly, so as to realize torque transmission and ultimately realize automobile power transmission.

[0003] After the steel strip is connected at the head and tail to form a roll, the joint needs to be welded. The traditional method is to manually roll the steel strip first and then manually weld, which is low in efficiency and not conducive to industrial production. SUMMARY

[0004] In order to solve at least one technical problem mentioned in the background, the purpose of the present application is to provide a steel strip welding machine.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A steel strip welding machine, comprising:

[0007] A feeding unit, comprising a feeding part for actively clamping the steel strip, and a first translation module for translating the feeding part along the advancing direction of the steel strip;

[0008] A rolling unit arranged at the output side of the feeding part, comprising a rotatingly arranged rotating arm, a rolling clamping mechanism arranged on the rotating arm for clamping the steel strip led out by the feeding part, and a power member for driving the rotating arm to rotate circumferentially;

[0009] A welding unit arranged at the opposite side of the feeding unit, comprising a welding gun and a second translation module for driving the welding gun to move vertically to the advancing direction of the steel strip; along the advancing direction of the first translation module, the welding gun is located at the steel strip leading-out side of the rolling clamping mechanism; and the welding gun is located above the steel strip to weld above the joint of the steel strip.

[0010] The advantages of the present application are as follows:

[0011] Firstly, in the present application, the feeding unit is arranged to feed the steel strip, and the rolling unit cooperates with the feeding unit to complete the rolling of the steel strip, and finally the automatic welding is completed by the welding unit. Therefore, the present application uses machines instead of traditional manual rolling and welding steps, which greatly improves the work efficiency.

[0012] Secondly, the feeding unit not only includes a feeding part for actively clamping the steel belt, but also includes a first translation module for translating the feeding part in the advancing direction of the steel belt. In this way, the steel belt is driven by the first translation module to advance with the feeding part while being conveyed by the feeding part. Thus, the steel belt is connected at the first end and the second end after the winding unit completes 360° winding. Then, the subsequent welding gun is driven by the second translation module to advance and weld at the connection position.

[0013] Furthermore, the first translation module has another effect. The first end and the second end of the steel belt may have a gap or overlap after winding. In this case, the subsequent welding is not conducive. Therefore, when the first end and the second end have a gap, the first translation module drives the second end of the steel belt to retreat with the feeding part until the second end abuts against the first end. In this way, the first end and the second end are tightly connected for subsequent welding. When the first end and the second end overlap, the first translation module drives the second end of the steel belt to continue advancing with the feeding part until the first end and the second end do not overlap. Then, the first translation module drives the second end of the steel belt to retreat with the feeding part until the first end and the second end abut tightly.

[0014] Finally, in the present scheme, the welding gun is located on the steel belt leading-out side of the winding clamping mechanism in the advancing direction of the first translation module. The welding gun is located above the steel belt. In this way, the initial position of the welding gun can be positioned. The leading-out length of the first end of the steel belt through the winding clamping mechanism is adjusted so that the end is just in the advancing path of the welding gun. Subsequently, whether the second end of the steel belt is driven to advance or retreat, the abutting position of the first end and the second end is in the advancing path of the welding gun. Thus, the welding gun can normally weld at the abutting position of the first end and the second end.

[0015] Preferably, the welding unit further includes a blocking piece that can slide horizontally perpendicular to the advancing direction of the steel belt. The blocking piece includes an abutting surface for the first end of the steel belt to abut against. The advancing path of the welding gun coincides on the abutting surface.

[0016] Preferably, the blocking piece is arranged on a linear module. The linear module drives the blocking piece to advance or retreat.

[0017] Preferably, the feeding unit further includes a feeding clamping mechanism arranged on the input side of the feeding part for clamping the steel belt. The feeding clamping mechanism is driven by the first translation module to move synchronously with the feeding part.

[0018] Preferably, the welding unit further includes an unloading piece for unloading the steel belt after welding and a driving mechanism. The unloading piece is arranged on the front side of the welding gun and is driven by the driving mechanism to move up and down. The unloading piece is connected with the second translation module. The second translation module drives the unloading piece and the welding gun to move synchronously in a direction perpendicular to the advancing direction of the steel belt.

[0019] As preferred, the second translation module is connected with a driving mechanism, and the second translation module is driven by the driving mechanism to move up and down, and the welding gun and the unloading part are arranged on the second translation module.

[0020] As preferred, a connecting plate driven by the second translation module is arranged on the second translation module, and the welding gun and the unloading part are fixed on the connecting plate.

[0021] As preferred, the feeding part comprises a feeding wheel, a clamping wheel arranged above the driving wheel, and a driving part for driving the clamping wheel to move up and down relative to the feeding wheel, and during feeding, the steel belt is clamped between the feeding wheel and the clamping wheel, and the steel belt is driven to move forward by the feeding wheel.

[0022] As preferred, the rolling clamping member and / or the feeding clamping member comprises a fixed clamping block, a movable clamping block arranged on the opposite side of the fixed clamping block and movable relative to the fixed clamping block, and a clamping cylinder for driving the movable clamping block to move.

[0023] As preferred, the first translation module and / or the second translation module is a lead screw linear module.

[0024] Other advantages and effects of the present application are explained in detail in the specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0026] Figure 2 It is a schematic diagram of the structure of the feeding unit Figure 1 ;

[0027] Figure 3 It is a schematic diagram of the structure of the feeding unit Figure 2 ;

[0028] Figure 4 It is a schematic diagram of the structure of the rolling unit;

[0029] Figure 5 It is a schematic diagram of the front side structure of the welding unit;

[0030] Figure 6 It is a schematic diagram of the back side structure of the rolling unit;

[0031] Figure 7 It is a state diagram of the present application in the feeding stage;

[0032] Figure 8 It is a state diagram of the present application in the rolling stage;

[0033] Figure 9 It is a state diagram of the present application in the welding stage. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0035] Please refer to Figures 1-9 The present embodiment provides a steel strip welding machine, mainly used for winding and welding of special steel flat steel strip, such as Figure 1 The steel strip welding machine mainly comprises a base 1, a feeding unit 2, a winding unit 3, and a welding unit 4. The following will be described in detail.

[0036] It is worth mentioning that the steel strip is segmented in advance, and each segment of the steel strip is finally wound and welded to form a steel strip ring. The M part in the figure is the steel strip.

[0037] Please refer to Figure 2 and Figure 3 The feeding unit 2 is mainly used for feeding the steel strip, and is arranged on the base 1. It comprises a feeding part 21 for actively clamping the steel strip, and a first translation module 22 for translating the feeding part 21 along the forward direction of the steel strip. As shown by the arrow direction of the N part in Figure 2 The moving end of the first translation module 22 is marked as left, and the moving starting end is marked as right for convenience.

[0038] As shown in Figure 2 For the first translation module 22, a lead screw linear module can be used, which comprises an upper rack 221 arranged on the base 1, a first slide rail 222 horizontally arranged on the rack 221, a first lead screw 223 rotatably arranged on the first slide rail 222, and a first motor 224 for driving the first lead screw 223 to rotate. A first sliding seat 225 is slidably arranged on the first slide rail 222 and is threadedly connected with the first lead screw 223. Thus, the first motor 224 drives the first lead screw 223 to rotate, and then the first sliding seat 225 moves forward or backward along the first slide rail 222.

[0039] Please refer to Figure 2 and Figure 3 The feeding part 21 comprises a feeding wheel 211 arranged on the first sliding seat 225, and a clamping wheel 213 arranged above the driving wheel (as shown in Figure 3As shown), and a driving component 212, which is provided on the first slide 225 to drive the clamping wheel 213 to move up and down relative to the feeding wheel 211, during feeding, the steel belt is clamped between the feeding wheel 211 and the clamping wheel 213. The feeding wheel 211 rotates to drive the steel belt forward. The feeding wheel 211 is driven to rotate actively by the feeding motor 214 provided on the first slide 225. Thus, when the steel belt is clamped between the feeding wheel 211 and the clamping wheel 213, the feeding wheel 211 rotates to clamp and feed the steel belt forward to deliver the belt. The driving component 212 can be a cylinder.

[0040] Since the tail end of the steel strip needs to be fixed after coiling, and the tail end of the steel strip is moved by the first translation module 22 to fine-tune the position of the tail end of the steel strip (for ease of explanation, this step is referred to as the fine-tuning step) so that the beginning and end of the steel strip can be firmly connected, if the steel strip is fixed by only relying on the clamping of the feeding wheel 211 and the clamping wheel 213, the tail end of the steel strip is prone to shifting or lifting during the movement, making it difficult for the beginning and end of the steel strip to be properly connected. Therefore, in this embodiment:

[0041] like Figure 2 As shown, the feeding unit 2 also includes a feeding clamping mechanism 23 located on the input side of the feeding section 21 for clamping the steel strip. The feeding clamping mechanism 23 is driven by the first translation module 22 and moves synchronously and in the same direction as the feeding section 21. Here, the input side of the feeding section 21 refers to the right side of the feeding section 21, that is, the side where the steel strip is introduced into the feeding section 21. The feeding clamping mechanism 23 is mainly used to clamp the tail end of the steel strip during the subsequent welding fine-tuning steps. It should be noted that when the feeding clamping mechanism 23 clamps the tail end of the steel strip, it needs to ensure that the tail end of the steel strip is led out from the right end of the feeding clamping mechanism 23 to align with the head end of the steel strip. In this way, during fine-tuning, the tail end of the steel strip can be clamped by the feeding clamping mechanism 23 first to ensure the stability of the tail end of the steel strip during the fine-tuning process, so that it can be firmly aligned with the head end of the steel strip.

[0042] Specifically, such as Figure 2 As shown, the feeding clamping mechanism 23 includes a first fixed clamping block 231, a first movable clamping block 232 located on the opposite side of the first fixed clamping block 231 and movable relative to the first fixed clamping block 231, and a first clamping cylinder 233 that drives the first movable clamping block 232 to move up and down. The first fixed clamping block 231, the first movable clamping block 232 and the first clamping cylinder 233 are all located on the first slide block 225. Thus, the first clamping cylinder 233 drives the first movable clamping block 232 to press down, so as to clamp the steel strip on the first fixed clamping block 231.

[0043] Combination Figure 1 and Figure 4 As shown, the coiling unit 3 is mainly used for 360° coiling of the steel strip. It is located on the output side of the feeding section 21, as follows:Figure 3 As shown, the output side here refers to the left side of the feeding part 21, i.e. the leading-out side of the steel strip, as shown in Figure 4 As shown, the coiling unit 3 comprises a rotatingly arranged rotating arm 31, a coiling clamping mechanism 33 arranged on the rotating arm 31 for clamping the steel strip led out from the feeding part 21, and a power element for driving the rotating arm 31 to rotate circumferentially; a coiling frame 30 is fixedly arranged on the base 1, the rotating arm 31 is rotationally connected to the coiling frame 30, and the coiling frame 30 is provided with a coiling motor 32 for driving the rotating arm 31 to rotate.

[0044] As shown in Figure 4 As shown, the coiling clamping mechanism 33 comprises a second fixed clamping block 331, a second movable clamping block 332 arranged on the opposite side of the second fixed clamping block 331 and movable relative to the second fixed clamping block 331, and a second clamping cylinder 333 for driving the second movable clamping block 332 to move, the second fixed clamping block 331 is arranged at the upper end of the rotating arm 31, and the second movable clamping block 332 and the second clamping cylinder 333 are arranged on the rotating arm 31; when clamping, the steel strip passes between the second fixed clamping block 331 and the second movable clamping block 332, and then the second movable clamping block 332 is pressed upward by the second clamping cylinder 333 to clamp the steel strip on the second fixed block; it is worth noting that when the rotating arm 31 is in the initial position, the height positions of the steel strips clamped by the feeding clamping mechanism 23 and the coiling clamping mechanism 33 are the same, so that the first end and the second end of the steel strip are at the same height after coiling to perform butt joint and welding.

[0045] As shown in Figure 1 As shown, the welding unit 4 is arranged on the opposite side of the feeding unit 2, in combination with Figure 5 and Figure 6 As shown, the welding unit 4 comprises a welding frame 40 arranged on the base 1, a welding gun 41, and a second translation module 42 for driving the welding gun 41 to move along a horizontal direction perpendicular to the advancing direction of the steel strip; in the advancing direction of the first translation module 22, the welding gun 41 is located on the steel strip leading-out side of the coiling clamping mechanism 33, i.e. when the coiling clamping mechanism 33 is in the initial position, the advancing path of the welding gun 41 is located on the left side of the coiling clamping mechanism 33, the advancing path here is the moving path direction of the second translation module 42, i.e. the welding path of the welding gun 41, and the welding gun 41 is located above the steel strip to perform welding above the joint of the steel strip.

[0046] The advancing path of the welding gun 41 is arranged at the left side of the coiling mechanism, so that the initial position of the welding gun 41 can be positioned, that is, the advancing path, and only the leading end of the steel strip needs to be adjusted to be just in the advancing path of the welding gun 41 by adjusting the leading end of the steel strip to be introduced out of the coiling and clamping mechanism 33, that is, the distance between the leading end of the steel strip and the coiling and clamping mechanism 33, so that the leading end of the steel strip is just in the advancing path of the welding gun 41, and no matter whether the trailing end of the steel strip is advanced or retreated, the butt joint position of the leading end and the trailing end of the steel strip is in the advancing path of the welding gun 41, so that the welding gun 41 can normally weld at the butt joint position, that is, after the vertical distance L1 between the advancing path of the welding gun 41 and the coiling and clamping mechanism 33 is determined, the distance between the leading end of the steel strip and the coiling and clamping mechanism 33 is only required to be basically equal to L1 when the steel strip is clamped by the coiling and clamping mechanism 33, and after the rotating arm 31 rotates 360°, the leading end of the steel strip is still in the position, that is, in the advancing path of the welding gun 41, so that the welding gun 41 does not need to be adjusted leftward or rightward to weld along the advancing path.

[0047] From the above process, it can be seen that the distance between the leading end of the steel strip and the coiling and clamping mechanism 33 needs to be observed or detected by a person, which is not convenient to operate and has a large error, so the embodiment is further improved.

[0048] As shown in Figures 5-7 , the welding unit 4 further comprises a blocking piece which can slide horizontally perpendicular to the advancing direction of the steel strip, the blocking piece comprises a blocking surface for the leading end of the steel strip to abut against, and the advancing path of the welding gun 41 coincides with the blocking surface, specifically, as shown in Figure 7 , the blocking piece can adopt a horizontally arranged blocking plate 43, and the right wall of the blocking plate 43 serves as the blocking surface; thus, when the steel strip is fed, the blocking plate 43 is slid to the left side of the coiling and clamping mechanism 33, and then the leading end of the steel strip is pulled forward until the leading end abuts against the blocking surface, so that the leading end of the steel strip is just in the welding advancing path of the welding gun 41; when the steel strip is coiled, the blocking plate 43 is pulled back to reset the blocking plate 43, so as to avoid interference of the blocking plate 43 with the rotation of the rotating arm 31 and to avoid the coiling action of the steel strip.

[0049] As shown in Figure 5 , a linear module 44 is arranged on the welding frame 40, which can be electric or manual as long as it can drive the blocking plate 43 to move linearly, and there are a large number of public documents in the prior art to explain the linear module 44, which will not be described in detail here, such as a screw linear module, a pneumatic cylinder, etc.; the blocking plate 43 is connected with the linear module 44, and the linear module drives the blocking plate 43 to slide horizontally perpendicular to the advancing direction of the steel strip, that is, to drive the blocking plate 43 to advance or retreat.

[0050] As shown in Figure 5As shown, for the second translation module 42, a lead screw linear module can be adopted, which includes a second slide rail 421 horizontally arranged on the welding frame 40, a second lead screw (not shown in the figure due to the angle of view) arranged in rotation, and a second motor 423 driving the second lead screw to rotate, and the second slide rail 421 is slidably provided with a second sliding seat 422 threadedly connected with the second lead screw, so that the second lead screw is driven to rotate by the second motor 423, and then the second sliding seat 422 advances or retreats along the second slide rail 421, and a connecting plate 47 is arranged on the second sliding seat 422, and the welding gun 41 is fixed on the connecting plate 47.

[0051] When the steel strip is welded, the steel strip will be hung on the feeding part 21 and the winding clamping mechanism 33, and needs to be manually taken down, which is not safe and inconvenient to operate. Therefore, in order to facilitate unloading, the embodiment is further improved, and the specific improvements are as follows:

[0052] As shown in Figure 5 and Figure 6 , the welding unit 4 further comprises an unloading part 45 for unloading the welded and formed steel strip, and a driving mechanism 46, the unloading part 45 is arranged on the front side of the welding gun 41 and is driven to move up and down by the driving mechanism 46, and the unloading part 45 mainly presents a vertical rod structure; the unloading part 45 is further connected with the second translation module 42, and specifically, the unloading part 45 is fixed on the connecting plate 47 and is driven to move by the second translation module 42, so that the unloading part 45 and the welding gun 41 move synchronously along the direction perpendicular to the advancing direction of the steel strip, that is, the unloading part 45 and the welding gun 41 move synchronously and in the same direction, during welding, the welding gun 41 and the unloading part 45 are driven forward by the second translation module 42, in this process, the welding gun 41 advances along the butt joint of the two ends of the steel strip to weld the butt joint, at the same time, the unloading part 45 is also driven to the interval position between the welded steel ring and the rack 221 by the second translation module 42, then the driving mechanism 46 drives the unloading part 45 to move downward until it is inserted into the interval between the steel ring and the rack 221, then the welding gun 41 and the unloading part 45 are driven to reset synchronously by the second translation module 42, that is, to retreat; in this way, the unloading part 45 will pull the steel ring back during the resetting process, so as to pull down the steel ring from the feeding unit 2 and the winding unit 3, and the pulled-down steel ring directly falls down, and then is collected.

[0053] In the embodiment, the second translation module 42 is connected with the driving mechanism 46 and is driven to move up and down by the driving mechanism 46, and the welding gun 41 and the unloading part 45 are arranged on the second translation module 42, and specifically, as shown in Figure 5As shown, the driving mechanism 46 comprises a third sliding rail 461 fixed vertically on the welding frame 40, a third sliding block 462 slidingly connected on the third sliding rail 461, and a discharging cylinder 463, wherein the second sliding rail 421 is fixed on the third sliding block 462, and the discharging cylinder 463 is fixed with the second sliding rail 421 to drive the second sliding rail 421 to ascend and descend, thereby realizing the whole second translation module 42 to ascend and descend as a whole, and finally realizing the lifting of the discharging piece 45.

[0054] The device is used mainly including feeding, rolling, fine tuning, welding, and discharging steps, specifically:

[0055] Feeding: as shown in Figure 7 , which is a schematic diagram of the feeding stage. In the feeding stage, the feeding clamping mechanism 23 and the rolling clamping mechanism 33 are both in the non-clamping state, and the baffle 43 is slid forward to the material blocking position, and the first end of the steel strip is sequentially passed between the first fixed clamping block 231 and the first movable clamping block 232, and between the feeding wheel 211 and the clamping wheel 213, and then the driving part 212 drives the driving clamping wheel 213 to press down to press the steel strip on the feeding wheel 211, and then the feeding wheel 211 forwards the steel strip until the first end of the steel strip abuts against the abutting surface of the baffle 43, and then the feeding wheel 211 stops rotating to feed, and then the baffle 43 is controlled to retreat to reset to avoid interference with the subsequent rolling action.

[0056] Rolling: as shown in Figure 8 , which is a schematic diagram of the rolling stage. First, the second clamping cylinder 333 drives the second movable clamping block 332 to press down to press the steel strip on the second fixed clamping block 331 to realize the steel strip clamping action of the rolling clamping mechanism 33; then, the rolling motor 32 drives the rotating arm 31 to rotate, so that the steel strip clamped on the rotating arm 31 is wound with the rotating arm 31. In the process of rotating the rotating arm 31, the feeding wheel 211 is opened, so that the feeding wheel 211 continuously forwards the steel strip, and at the same time, the first translation module 22 drives the entire feeding part 21 to move forward as well. When the rotating arm 31 rotates 360° to reset, the steel strip is wound one turn, and at this time, the first end of the steel strip returns to the initial position, and the tail end of the steel strip is driven by the first translation module 22 to the left side of the first end of the steel strip (as shown in Figure 9 ).

[0057] Fine-tuning: First, loosen the clamping wheel 213 from the steel strip. Then, control the feeding clamping mechanism to clamp the steel strip. Specifically, the first movable clamping block 232 moves to clamp the steel strip between the first movable clamping block 232 and the first fixed clamping block 231, thus clamping the tail end of the steel strip. Next, the fine-tuning steps can begin: If the beginning and end of the steel strip are in the first state, the first translation module 22 can drive the feeding clamping mechanism holding the steel strip to retract until the tail end of the steel strip abuts against the beginning end, achieving docking. If the beginning and end of the steel strip are in the second state, the first translation module 22 can drive the feeding clamping mechanism 23 to advance a certain distance to separate the beginning and end of the steel strip. Then, the first translation module 22 can drive the feeding clamping mechanism 23 to retract until the tail end of the steel strip abuts against the beginning end, achieving docking, allowing subsequent welding steps to proceed.

[0058] Welding: such as Figure 9 The diagram shows the welding state. The welding torch 41 and the unloading component 45 are moved forward as a whole by the second translation module 42. The forward path of the welding torch 41 is located at the joint of the beginning and end of the steel strip. Thus, the welding torch 41 welds the joint of the steel strip when it moves forward. It should be noted that the welding torch 41 in this embodiment can be a laser welding head. During welding, there is a certain distance between the welding head of the welding torch 41 and the steel strip in the height direction to ensure that the welding head does not press against the steel strip when the unloading component 45 presses down during subsequent unloading.

[0059] Unloading: During the welding process, the unloading component 45 has been moved by the second translation module 42 to the position above the gap between the steel strip and the frame 221. At this time, the unloading cylinder 463 only needs to drive the entire second translation module 42 to descend, thereby driving the unloading component 45 to descend and insert it between the steel strip and the frame 221. Then, control the second translation module 42 to drive the welding gun 41 and the unloading component 45 to retract and reset. During the retraction of the unloading component 45, the steel strip will be pulled back, and finally the steel strip will be pulled off the equipment and fall down for collection.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A steel strip welding machine, characterized in that, The application relates to a steel strip welding and rolling device. The device comprises a feeding unit, a rolling unit and a welding unit. The feeding unit comprises a feeding part for actively clamping the steel strip and a first translation module for translating the feeding part along the advancing direction of the steel strip; the feeding unit further comprises a feeding clamping mechanism arranged on the input side of the feeding part for clamping the steel strip, and the feeding clamping mechanism is driven by the first translation module to move synchronously with the feeding part; The rolling unit is arranged on the output side of the feeding part and comprises a rotatingly arranged rotating arm, a rolling clamping mechanism arranged on the rotating arm for clamping the steel strip led out of the feeding part, and a power member for driving the rotating arm to rotate circumferentially; during rolling, the rolling clamping mechanism clamps the first end of the steel strip, and the rotating arm is rotated by 360 degrees to drive the steel strip to roll one circle; when the rotating arm is in the initial position, the height positions of the feeding clamping mechanism, the rolling clamping mechanism and the clamped steel strip are the same; during the rotating process of the rotating arm, the feeding part feeds the steel strip forward, and the first translation module drives the whole feeding part to move forward; The welding unit is arranged on the opposite side of the feeding unit and comprises a welding gun and a second translation module for driving the welding gun to move along the direction perpendicular to the advancing direction of the steel strip; along the advancing direction of the first translation module, the welding gun is located on the steel strip leading-out side of the rolling clamping mechanism; and the welding gun is located above the steel strip to weld above the joint of the steel strip; The feeding part comprises a feeding wheel, a clamping wheel arranged above the driving wheel and a driving member for driving the clamping wheel to move up and down relative to the feeding wheel; during feeding, the steel strip is clamped between the feeding wheel and the clamping wheel, and the feeding wheel drives the steel strip to advance; 2. A strip welding machine according to claim 1, characterised in that The first translation module and / or the second translation module are screw straight-line modules.

3. A strip welding machine according to claim 2, characterised in that The welding unit further comprises a blocking member which can slide horizontally along the direction perpendicular to the advancing direction of the steel strip; the blocking member comprises a blocking surface for abutting against the first end of the steel strip; and the advancing path of the welding gun coincides with the blocking surface.

4. A strip welding machine according to claim 1, characterized in that The blocking member is arranged on a straight-line module and is driven by the straight-line module to advance or retreat.

5. A strip welding machine according to claim 4, characterised in that The welding unit further comprises a discharging member for discharging the steel strip welded and formed and a driving mechanism; the discharging member is arranged on the front side of the welding gun and is driven by the driving mechanism to move up and down; the discharging member is further connected with the second translation module and is driven by the second translation module to move synchronously with the welding gun along the direction perpendicular to the advancing direction of the steel strip.

6. A strip welding machine according to claim 5, characterised in that The second translation module is connected with the driving mechanism and is driven by the driving mechanism to move up and down; the welding gun and the discharging member are arranged on the second translation module.

7. A strip welding machine according to claim 1, characterized in that A connecting plate driven by the second translation module is arranged on the second translation module; the welding gun and the discharging member are fixed on the connecting plate. The rolling clamping member and / or the feeding clamping member comprise a fixed clamping block, a movable clamping block arranged on the opposite side of the fixed clamping block and movable relative to the fixed clamping block, and a clamping cylinder for driving the movable clamping block to move.

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