CN215999027U - Series welding machine - Google Patents

Abstract

The application relates to a series welding machine. This stringer is including accepting platform, transport mechanism and welding mechanism, accepts the platform and is used for supporting a string unit, and a string unit includes along first horizontal direction overlap joint's welding area and battery piece in proper order, and transport mechanism includes transport subassembly and transmission assembly, and the transport subassembly is used for a string unit that will accept on the platform to carry to transmission assembly, and transmission assembly is used for carrying a string unit to welding mechanism department welding mechanism and is used for welding the welding area and the battery piece of string unit. The application provides a stringer compares with prior art, utilizes the string unit that the transport subassembly will be constructed to carry transmission assembly, when accepting string unit on the platform at the construction in-process, the string unit that has constructed on the transmission assembly is being conveyed or is being welded, the transmission assembly need not wait for string unit to construct the transport that just carries out string unit after finishing, transmission assembly's transmission efficiency improves greatly, and then has improved whole stringer's work efficiency.

Description

Series welding machine

Technical Field

The application relates to the technical field of photovoltaic cell manufacturing equipment, in particular to a series welding machine.

Background

The stringer is one of the important devices in the production process of photovoltaic cells, and a plurality of battery plates are welded into a string of battery strings by using a solder strip. In a conventional series welding machine, a battery piece is generally directly laid on a conveyor belt, a welding belt is laid on the conveyor belt and is kept connected with the battery piece, and finally the laid welding belt and the battery piece are conveyed to a welding position by the conveyor belt to be welded to form a battery string. The mode needs to start conveying after the battery plates and the welding strips on the conveying belt are laid, conveying efficiency is low, and working efficiency of the series welding machine is reduced.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a series welding machine which can solve the above-mentioned problems, such as low working efficiency of the series welding machine caused by low conveying efficiency of the conveyor belt in the prior art.

A series welding machine comprises a bearing platform, a conveying mechanism and a welding mechanism;

the bearing platform is used for supporting a string unit, and the string unit comprises a welding strip and a battery piece which are sequentially overlapped along a first horizontal direction;

the conveying mechanism comprises a carrying assembly and a transmission assembly, the carrying assembly is used for conveying the string units on the bearing platform to the transmission assembly, and the transmission assembly is used for conveying the string units to the welding mechanism;

the welding mechanism is used for welding the welding strips of the string units and the battery pieces.

In one embodiment, the transport assembly includes a conveyor belt disposed along the first horizontal direction;

the conveying belt is provided with a channel extending along the first horizontal direction, and when the conveying belt moves, the carrying assembly moves to the channel so as to convey the string units from the bearing platform to the conveying belt.

In one embodiment, the channels divide the conveyor belt into a plurality of sub-conveyor belts;

the conveying assembly further comprises a plurality of guide wheels which rotate synchronously, the guide wheels are arranged at intervals along a second horizontal direction perpendicular to the first horizontal direction, and each guide wheel is correspondingly connected to one sub-conveying belt and used for driving the corresponding sub-conveying belt to move.

In one embodiment, the solder strips of the string units on the conveyor belt are located in the channel;

the conveying mechanism further comprises a positioning platform located below the conveying belt, the positioning platform is provided with a clamping groove extending along the first horizontal direction, and the clamping groove is located below the channel and used for supporting and guiding the welding strip in the channel.

In one embodiment, the transfer mechanism further comprises a transfer assembly located at least partially at the welding mechanism;

the transfer assembly comprises a first transfer support located below the channel and configured to be raised and lowered along the channel to jack the string units on the conveyor belt;

the conveyor belt is further configured to move in reverse to an initial position after the first intermediate support bearing against the string unit.

In one embodiment, an end of the first intermediate support member facing away from the receiving platform is located outside the welding mechanism.

In one embodiment, the receiving platform further has an elongated slot extending along the first horizontal direction, the elongated slot penetrating through the receiving surface of the receiving platform;

the conveying assembly comprises a conveying driving member and a conveying member, the conveying driving member is connected with the conveying member, the conveying driving member is used for driving the conveying member to ascend along the long groove, so that the conveying member supports the string unit, and the conveying member is used for driving the conveying member to convey the string unit to the conveying assembly.

In one embodiment, the carrying member comprises a plurality of long rods arranged at intervals along a second horizontal direction perpendicular to the first horizontal direction, and the receiving platform comprises a plurality of long grooves;

the carrying driving piece is used for driving the long rods to move synchronously, and each long rod can be correspondingly accommodated in one long groove;

when the string unit is supported by the bearing platform, the carrying driving piece drives the long rods to bear and convey the string unit to the transmission assembly.

In one embodiment, the stringer has a preheating station and a welding station, the welding mechanism includes a preheating assembly located at the preheating station and a welding assembly located at the welding station, and the conveying mechanism is further configured to convey the stringer unit to the preheating station and the welding station in sequence.

In one embodiment, the device further comprises a net pressing circulating mechanism, wherein the net pressing circulating mechanism comprises a net pressing feeding assembly, a net pressing discharging assembly and a net pressing conveying assembly;

the net pressing and feeding assembly is used for pressing a net on the string units of the bearing platform, the net pressing and discharging assembly is used for taking down the net pressing on the welded string units, and the net pressing and conveying assembly is used for conveying the net pressing taken down by the net pressing and discharging assembly to the net pressing and feeding assembly;

the conveying mechanism is also used for supporting and conveying the press net pressed on the string unit.

According to the stringer, during actual operation, a string unit is constructed on a bearing platform, then the transport assembly conveys the constructed string unit to the transmission assembly, the transmission assembly conveys the constructed string unit to the welding mechanism, and the welding mechanism is started to weld a welding strip and a battery piece in the string unit. During the process of transmitting the string unit by the transmission assembly, another string unit can be constructed on the receiving platform. Compared with the prior art, the transmission assembly does not need to wait for the transmission of the string unit after the string unit is constructed, the transmission efficiency of the transmission assembly is greatly improved, the welding efficiency of the welding mechanism is further improved, and the working efficiency of the whole string welding machine is further improved.

Drawings

Fig. 1 is a schematic structural diagram of a string unit in an embodiment of the present application;

FIG. 2 is a schematic view showing the internal connection state of the string unit shown in FIG. 1;

FIG. 3 is a schematic structural diagram of a stringer according to an embodiment of the present application;

FIG. 4 is a schematic view of the transfer mechanism of the stringer shown in FIG. 3;

FIG. 5 is a schematic view of the structure of the conveyor belt of the conveyor mechanism shown in FIG. 4;

FIG. 6 is a schematic structural view of a positioning platform in the transport mechanism shown in FIG. 4;

FIG. 7 is a schematic structural view of a transfer assembly of the transfer mechanism shown in FIG. 4;

FIG. 8 is a schematic view of a portion of the stringer shown in FIG. 3;

FIG. 9 is a schematic structural diagram of a receiving platform according to an embodiment of the present application;

FIG. 10 is a schematic view of the receiving platform shown in FIG. 4;

fig. 11 is a front view of the structure shown in fig. 10.

FIG. 12 is a partial schematic view of the stringer shown in FIG. 3;

fig. 13 is a schematic structural view of a pitch driving assembly in the structure shown in fig. 12.

Description of reference numerals:

10. a series welding machine; 11. a receiving platform; 111. a first receiving part; 1111. air holes; 1112. carrying out strip bearing; 1113. an evacuation section; 112. a second receiving part; 1121. a groove; 1122. an avoidance groove; 113. bending the hole; 114. a long groove; 12. a bending mechanism; 13. a variable pitch drive assembly; 131. a variable pitch drive;

132. a support plate; 14. a transport mechanism; 141. a handling assembly; 1411. carrying the driving member; 1411a, vertical drive; 1411b, horizontal drive; 1412. a carrier; 1412a, a long rod; 1412b, a first carrying member; 1412c, a second carrying member; 142. a transmission assembly; 1421. a conveyor belt; 1421a, channel; 1421b, sub-conveyor; 1421c, guide wheels; 143. positioning the platform; 1431. a card slot; 1432. a transit trough; 144. a transfer component; 1441. a first intermediate support member; 1442. a second intermediate support member; 15. a welding mechanism; 151. a preheating assembly; 152. welding the assembly; 16. a net pressing circulation mechanism; 161. a net pressing and feeding assembly; 162. a net pressing and blanking assembly; 163. a net pressing and conveying assembly; a. preheating a station; b. a welding station; c. a blanking station; 20. a string unit; 21. a structural unit; 211. a battery piece; 212. and (7) welding the strip.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and 2, the string unit 20 mentioned in the embodiment of the present application includes at least one structural unit 21. The structural unit 21 is composed of a set of solder strips 212 and a battery piece 211, wherein the solder strips 212 are divided into a first part and a second part along the length direction thereof. A first portion of each solder ribbon 212 in the structural unit 21 is overlapped on the upper surface of the battery tab 211, and a second portion of the solder ribbon 212 and the lower surface of the battery tab 211 are in an unconnected state. When the string unit 20 includes two or more structural units 21, according to one construction of the string unit 20, the lower surface of the battery piece 211 of the i-1 st structural unit 21 is pressed against the second portion of the solder ribbon group of the i-th structural unit 21, the second portion of the solder ribbon 212 of the 1 st structural unit 21 is in an unconnected state, the lower surface of the battery piece 211 of the nth structural unit 21 is in an unconnected state, i is an integer and is greater than 1 and less than N. The string unit 20 may also take other construction forms, such as a solder ribbon 212 connected to the lower surfaces of two adjacent battery cells 211 to form a back contact type battery string. The present application does not limit the manner in which the string units of the stringer 10 are constructed.

Referring to fig. 3, an embodiment of the present application provides a series welding machine 10, which includes a receiving platform 11, a conveying mechanism 14, and a welding mechanism 15, where the receiving platform 11 is configured to support a series unit 20, the series unit 20 includes a solder strip 212 and a battery piece 211 that are sequentially overlapped along a first horizontal direction, the conveying mechanism 14 includes a carrying assembly 141 and a transmission assembly 142, the carrying assembly 141 is configured to convey the series unit 20 on the receiving platform 11 to the transmission assembly 142, the transmission assembly 142 is configured to convey the series unit 20 to the welding mechanism 15, and the welding mechanism 15 is configured to weld the solder strip 212 and the battery piece 211 of the series unit 20.

The stringer 10 is configured to build the string unit 20 on the receiving platform 11, then the carrying assembly 141 conveys the built string unit 20 to the transmission assembly 142, then the transmission assembly 142 conveys the built string unit 20 to the welding station b of the welding mechanism 15, and the welding mechanism 15 is started to weld the welding strip 212 and the battery piece 211 in the string unit 20 at the welding station b. During the process of transferring the string unit 20 by the transferring assembly 142, another string unit 20 can be constructed on the receiving platform 11.

Compared with the prior art, the string unit 20 is constructed by the bearing platform 11, the constructed string unit 20 is conveyed to the transmission component 142 by the carrying component 141, the string units 20 received by the transmission component 142 are all the constructed string units 20, when the string units 20 on the bearing platform 11 are constructed, the constructed string units 20 on the transmission component 142 are being conveyed or welded, the transmission component 142 does not need to wait for conveying the string units 20 after the string units 20 are constructed, the transmission efficiency of the transmission component 142 is greatly improved, the welding efficiency of the welding mechanism 15 is further improved, and the working efficiency of the whole string welding machine 10 is further improved.

It should be noted that the receiving platform 11 is used for overlapping the solder strip 212 and the battery sheet 211 in sequence along the first horizontal direction to construct the string unit 20.

Here, the string unit 20 may be constructed by manually constructing the solder ribbon 212 and the battery sheet 211 in accordance with the construction method of the existing string unit 20, or the string unit 20 may be constructed by using an automated device such as a robot. The receiving platform 11 functions to provide a support platform for building the string unit 20.

The carrying assembly 141 may be a suction cup assembly, a conveyor belt assembly, a clamping jaw assembly, etc., and the specific manner is not limited herein.

In some embodiments, the uptake platform 11 builds the string units 20 while the transport assembly 142 transports the string units 20. In actual operation, when the transport assembly 142 is transporting the string units 20, the receiving platform 11 starts to build new string units 20 without waiting for the string units 20 on the transport assembly 142 to be welded. While the first string of units is being welded at the welding mechanism 15, the handling assembly 141 may deliver the second string of units onto the transport assembly 142. The first string of units, which have been welded, are transported by the transport assembly 142 downstream while a second string of units can be transported to the welding mechanism 15 for welding. In this way, the welding mechanism 15 can continuously weld the string units 20, and the work efficiency of the string welding machine 20 is improved.

In some embodiments, referring to fig. 9, the receiving platform 11 further has a first horizontally extending elongated slot 114, the elongated slot 114 penetrates through the receiving surface of the receiving platform 11, the carrying assembly 141 includes a carrying driving member 1411 and a carrying member 1412, the carrying driving member 1411 is connected with the carrying member 1412, the carrying driving member 1411 is used for driving the carrying member 1412 to ascend along the elongated slot 114, so that the carrying member 1412 supports the string unit 20 and is used for driving the carrying member 1412 to convey the string unit 20 to the conveying assembly 142.

In operation, after the string unit 20 on the platform 11 is constructed, the conveying driving member 1411 drives the conveying member 1412 to ascend along the long groove 114 to the supporting string unit 20, and after the conveying member 1412 supports the string unit 20, the conveying member 1412 is driven to move to the transmission assembly 142 to convey the string unit 20 to the transmission assembly 142. At this time, since the solder ribbon 212 and the battery sheet 211 in the string unit 20 are merely connected in a lap joint manner, the carrier 1412 supports the string unit 20 from the bottom to the top, which helps to ensure structural stability of the string unit 20 during conveyance of the string unit 20.

The receiving surface of the receiving platform 11 is a top surface that contacts the string unit 20. The long groove 114 penetrates the receiving surface of the receiving surface plate 11, and means that the long groove 114 penetrates the receiving surface of the receiving surface plate 11 at least in the vertical direction so that the conveyance member 1412 can receive the string unit 20 when it is lifted in the vertical direction. The fact whether the long groove 114 penetrates the bottom surface of the receiving platform 11 opposite to the receiving surface of the receiving platform 11 is not limited herein. In addition, whether the long groove 114 horizontally penetrates the receiving platform 11 is not limited herein. Preferably, the elongated slot 114 horizontally penetrates the receiving platform 11, so that when a plurality of receiving platforms 11 are used in combination, the serial units 20 on the respective receiving platforms 11 can be simultaneously supported and conveyed by one continuous conveying member 1412, thereby simplifying the structure of the conveying member 1412 and improving the welding efficiency. Of course, when a plurality of receiving platforms 11 are used in combination, the conveying driving member 1411 may be used to drive the segmented conveying member 1412 to correspondingly support the string units 20 on each receiving platform 11 and simultaneously convey the string units to the transmission assembly 142. When a plurality of receiving platforms 11 are used in combination, string units 20 located on the respective receiving platforms 11 can be connected to form a string unit 20 having a longer length.

In particular to the embodiment, referring to fig. 4, the carrying driving member 1411 includes a vertical driving member 1411a and a horizontal driving member 1411b, the vertical driving member 1411a and the horizontal driving member 1411b are connected, the carrying member 1412 is disposed on one of the vertical driving member 1411a and the horizontal driving member 1411b, the vertical driving member 1411a is used for driving the carrying member 1412 to move vertically, and the horizontal driving member 1411b is used for driving the carrying member 1412 to move horizontally.

In actual operation, before the string unit 20 is constructed on the receiving platform 11, the horizontal driving member 1411b drives the carrying member 1412 to move to above the long slot 114, and the vertical driving member 1411a drives the carrying driving member 1411 to be accommodated in the long slot 114. After the carrying member 1412 moves to a proper position, the solder strips 212 and the battery pieces 211 are arranged on the receiving platform 11 according to a preset arrangement mode to construct the string unit 20. After the string unit 20 is constructed, the vertical driving member 1411a drives the carrying member 1412 to move upwards to jack up the string unit 20, so that the string unit 20 leaves the receiving platform 11, and the horizontal driving member 1411b drives the carrying member 1412 to horizontally move the jacked string unit 20 to the transmission assembly 142.

Preferably, the vertical drive 1411a is capable of driving the carrying member 1412 to rest in the resting position, wherein the carrying member 1412 in the resting position is received in the elongated slot 114 and is capable of carrying the string unit 20. In practice, when the receiving platform 11 is empty (before the string unit 20 is constructed), the vertical driving member 1411a drives the carrying member 1412 to be located at the supporting position, after the string unit 20 is constructed, the vertical driving member 1411a drives the carrying member 1412 to ascend for a certain distance so that the string unit 20 is separated from the receiving surface of the receiving platform 11, and then the horizontal driving member 1411b drives the carrying member 1412 to move to the conveying assembly 142. In this way, the string unit 20 is supported by the carrier 1412 during the construction of the string unit 20, which contributes to the improvement of the structural stability of the string unit 20.

It will be appreciated that the support surface of the carrier 1412 in the support position is flush with the receiving surface of the receiving platform 11 to support the string unit 20 together.

Alternatively, the number of the carrying assemblies 141 is at least two, and when the carrying members 1412 of one of the carrying assemblies 141 are located at the supporting position, the carrying members 1412 of the other carrying assemblies 141 transmit the string units 20.

The carrying member 1412 may be a conveyor belt, the conveyor belt is mounted on the horizontal driving member 1411b, the horizontal driving member 1411b is mounted on the vertical driving member 1411a, the vertical driving member 1411a drives the conveyor belt to move into the long slot 114 and supports the stringing unit 20, and then the horizontal driving member 1411b drives the conveyor belt to move to transfer the stringing unit 20. The horizontal drive 1411b at this time may be a motor and a transmission wheel assembly. The carrying member 1412 may also be a suction cup with a suction surface facing upward, the suction cup is positioned in the elongated slot 114 or below the elongated slot 114 before the string unit 20 is constructed, and after the string unit 20 is constructed, the suction cup is lifted to support and suck the string unit 20 and convey the string unit 20 to the conveying assembly 142 along the first horizontal direction.

In other embodiments, the conveying driving member 1411 may only include a horizontal driving member 1411b, in which case the supporting surface of the conveying member 1412 is flush with the supporting surface of the receiving platform 11, the horizontal driving member 1411b can drive the conveying member 1412 to move between the supporting position and the connecting position, the horizontal driving member 1411b can drive the conveying member 1412 to move to the supporting position before the string unit 20 is constructed, the horizontal driving member 1411b can drive the conveying member 1412 to move to the connecting position after the string unit 20 is constructed, and the conveying member 1412 in the connecting position can convey the string unit 20 to the transmission assembly 142.

In some embodiments, referring to fig. 3 and 4, the carrying member 1412 includes a plurality of long rods 1412a spaced apart along a second horizontal direction perpendicular to the first horizontal direction, the receiving platform 11 includes a plurality of elongated slots 114, the carrying driving member 1411 is used for driving the plurality of long rods 1412a to move synchronously, and each of the long rods 1412a can be received in one of the elongated slots 114 correspondingly, after the receiving platform 11 supports the string unit 20, the carrying driving member 1411 drives the plurality of long rods 1412a to support and convey the string unit 20 to the transmission assembly 142.

It is understood that each long rod 1412a extends in a first horizontal direction.

In actual operation, before the string unit 20 is constructed (when the receiving platform 11 is empty), the conveying driving member 1411 drives each long rod 1412a to be correspondingly positioned in each long groove 114, after the string unit 20 is constructed, the conveying driving member 1411 drives each long rod 1412a to synchronously support the string unit 20, then drives each long rod 1412a to synchronously move to the transmission assembly 142, and conveys the string unit 20 to the transmission assembly 142. Thus, the long rod 1412a is used as the carrying piece 1412, so that the driving structure can be simplified, the carrying piece 1412 is economical, and a good supporting effect can be achieved.

It should be noted that, referring to fig. 4, the carrying member 1412 includes a first carrying member 1412b and a second carrying member 1412c which move synchronously, the first carrying member 1412b is used for carrying the string unit 20, and the second carrying member 1412c is used for carrying the net pressing member pressed on the string unit 20. In practice, after the string unit 20 is constructed, the pressing net is pressed on the string unit 20 to press the solder strip 212 on the battery sheet 211. The second conveyance member 1412c is used to convey the compressed web synchronously, which helps to maintain the structural stability of the string unit 20. The second carrying member 1412c may have the same structure as the first carrying member 1412b, which is not described in detail.

In some embodiments, referring to fig. 3 and 5, the transmission assembly 142 includes a conveyor belt 1421, the conveyor belt 1421 is configured to be disposed along a first horizontal direction, a channel 1421a extending along the first horizontal direction is opened on the conveyor belt 1421, and when the conveyor belt 1421 moves, the carrying assembly 141 can move to the channel 1421a to convey the string unit 20 from the receiving platform 11 to the conveyor belt 1421. In actual operation, the carrying member 141 supports the string unit 20 and then enters the passage 1421a, the string unit 20 is located above the belt 1421, and the carrying member 141 descends after entering the passage 1421a to support the string unit 20 on the belt 1421. The handling assembly 141 then exits the channel 1421a to hold the string unit 20 at the receiving platform 11 again. Thus, by forming the channel 1421a on the conveyor 1421, the string unit 20 on the carrying assembly 141 can be conveniently conveyed onto the conveyor 1421 without damaging the structural stability of the string unit 20.

In particular embodiments, the transfer drive 1411 is capable of driving the transfer member 1412 to move along the slot 114 to the channel 1421a to transfer the string unit 20 from the receiving platform 11 onto the conveyor 1421. In practice, after the carrying member 1421 supports the string unit 20, the carrying member 1421 is still partially located in the slot 114, the carrying member 1412 enters the passage 1421a along the slot 114, the string unit 20 is still supported on the carrying member 1412 and is located above the conveyor belt 1421, and then the carrying member 1412 descends along the passage 1421a so that the string unit 20 on the carrying member 1412 is supported on the conveyor belt 1421, thereby completing the conveyance of the string unit 20. In this case, the moving distance of the conveyance member 1412 is short, which contributes to an increase in production efficiency. Specifically, in the embodiment, the channel 1421a divides the conveyor belt 1421 into a plurality of sub-conveyor belts 1421b, the transmission assembly 142 further includes a plurality of guide wheels 1421c that rotate synchronously, the plurality of guide wheels 1421c are disposed at intervals along a second horizontal direction perpendicular to the first horizontal direction, and each guide wheel 1421c is correspondingly connected to one sub-conveyor belt 1421b for driving the corresponding sub-conveyor belt 1421b to move. At this time, each guide wheel 1421c independently supports and guides the corresponding sub-conveyor belt 1421b to move, and can define the position of the corresponding sub-conveyor belt 1421b, thereby preventing the deformation of the passage 1421 a.

In practice, when the carrying member 1412 comprises a plurality of long rods 1412a, each long rod 1412a can move to the passage 1421a between two corresponding adjacent sub-conveyor belts 1421 b. In this manner, the string unit 20 is supported and conveyed by the plurality of sub-conveyor belts 1421b in synchronization, which helps to maintain the structural stability of the string unit 20.

Further, the transmission assembly 142 further includes a plurality of guide wheels 1421c of a linkage shaft, which are disposed on the linkage shaft, and the linkage shaft and the plurality of guide wheels 1421c rotate synchronously, so as to ensure the synchronism of the movement of the conveyor belt 1421. Specifically, the transmission assembly 142 further includes a motor and a driving wheel, an output end of the motor is connected to the driving wheel, and the driving wheel is connected to the linkage shaft and the guide wheel 1421c through the conveyor belt 1421. When the motor drives the driving wheel to rotate, the driven wheel formed by the linkage shaft and the guide wheels 1421c is driven to rotate by the conveying belt 1421, and the synchronism of the movement of each sub-conveying belt 1421b of the conveying belt 1421 is controlled by the plurality of guide wheels 1421 c.

In some embodiments, referring to fig. 3 and 6, the solder ribbon 212 of the cluster unit 20 on the conveyor 1421 is positioned in the channel 1421a, and the conveyor 14 further includes a positioning platform 143 below the conveyor 1421, the positioning platform 143 having a slot 1431 extending in the first horizontal direction, the slot 1431 being below the channel 1421a for supporting and guiding the solder ribbon 212 in the channel 1421 a.

Before welding, the solder ribbons 212 on the lower surface of the battery piece 211 in the string unit 20 are loose from the battery piece 211, and the relative positions of the solder ribbons 212 and the battery piece 211 are likely to shift when the conveyor belt 1421 conveys the string unit 20. In operation, after the carrier 1412 conveys the cluster unit 20 onto the conveyor 1421, the solder ribbon 212 of the cluster unit 20 is positioned in the slot 1431. When the conveyor 1421 moves, the solder strip 212 moves in the slot 1431, and the slot 1431 is used to limit the offset of the solder strip 212, thereby improving the yield of finished products.

The positioning platform 143 may extend from an end of the conveyor belt 1421 close to the receiving platform 11, at this time, a through slot for the movement of the carrying member 1412 is formed on the positioning platform 143, so that the carrying member 1412 can exit after conveying the string unit 20 to the conveyor belt 1421, at this time, when the string unit 20 is supported on the conveyor belt 1421, the second portion of the solder strip 212 in the string unit 20 is also supported in the slot 1431 of the positioning platform 143, and is transported along the slot 1431 when the conveyor belt 1421 moves. Alternatively, a conveying space is formed between the positioning platform 143 and one end of the conveyor belt 1421, which is close to the receiving platform 11, the carrying member 1412 can convey the string unit 20 to the conveyor belt 1421 when moving in the conveying space, and then after the string unit 20 is conveyed by the conveyor belt 1421 for a certain distance, the second portion of the solder strip 212 in the string unit 20 enters the slot 1431 of the positioning platform 143.

Preferably, the positioning platform 143 extends from an end of the conveyor 1421 proximate the receiving platform 11. Since the head end of the string unit 20 is the cell piece 211 with the lower surface unconnected, and the tail end is the solder strip 212 with the cell piece 211 unconnected. It is necessary to ensure that the position of the solder strip 212 at the end of the string unit 20 is accurate so as to be accurately connected to the lower surface of the cell 211 at the head end of the next string unit 20, to achieve the connection of the string unit 20, or to avoid the displacement of the solder strip 212. In actual operation, when the handling member 1412 conveys the string unit 20 to the conveyor 1421, the solder strip 212 at the end of the string unit 20 is also located in the slot 1431, so that the connection position can be ensured to be accurate when the next string unit 20 is butted, and the yield of finished products can be improved.

Preferably, the entrance end of the slot 1431 is flared and the width of the entrance end gradually shrinks along the extending direction of the slot 1431. In this manner, it is convenient to guide the solder ribbon 212 from the entrance end of the card slot 1431 into the card slot 1431.

Preferably, the number of the card slots 1431 is multiple, a plurality of the card slots 1431 are arranged at intervals along the second horizontal direction, and each card slot 1431 is used for guiding one solder strip 212, so that the solder strip 212 can accurately move.

In some embodiments, referring to fig. 3 and 7, the transfer mechanism 14 further includes a transfer assembly 144, the transfer assembly 144 is at least partially located at the welding mechanism 15, the transfer assembly 144 includes a first transfer support 1441, the first transfer support 1441 is located below the passageway 1421a and is configured to be lifted and lowered along the passageway 1421a to support the string unit 20 on the conveyor belt 1421, and the conveyor belt 1421 is further configured to be moved reversely to the initial position after the first transfer support 1441 supports the string unit 20.

In actual operation, after the conveyor 1421 conveys the string unit 20 to the welding station b of the welding mechanism 15, the first intermediate transfer member 1441 is lifted up and jacks up the string unit 20, and the conveyor 1421 moves reversely to the initial position so as to receive the string unit 20 again from the handling assembly 141. Subsequently, the first intermediate support 1441 is lowered, so that the jacked string unit 20 is returned onto the conveyor belt 1421. At this time, the string unit 20 performs a welding process at the first intermediate supporter 1441. Therefore, after the conveying belt 1421 conveys the string unit 20 to the welding station b, the string unit 20 can return without waiting for the completion of welding, which is beneficial to accelerating the conveying efficiency of the conveying belt 1421 and improving the working efficiency of the stringer 10.

It should be noted that when the conveyor 1421 moves reversely to the initial position, the conveyor 1421 moves reversely to the position of the receiving string unit 20. At this time, the passage 1421a of the conveyor 1421 can be moved by the carrier 1421.

Further, the extension length of the passage 1421a is smaller than the length of the conveyor belt 1421. In this manner, the channels 1421a need only be formed in portions of the belt 1421 to aid in the integrity of the movement of the belt 1421.

In particular embodiments, the end of the first intermediate transfer unit 1441 facing away from the receiving platform 11 is located outside the welding mechanism 15. At this time, the first intermediate support 1441 is partially located in the welding mechanism 15 and partially located behind the welding mechanism 15, so that the first intermediate support 1441 can prop up one string unit 20 to be welded and one welded string unit 20 at a time, and the string unit 20 to be welded can be smoothly connected with the welded string unit 20.

Further, an end of the first intermediate rotation support 1441 close to the receiving platform 11 is located outside the welding mechanism 15. At this time, the first intermediate support 1441 is also partially located at the upstream of the welding mechanism 15, so that the first intermediate support 1441 can jack up at least three string units 20 at a time, and further, smooth connection between the string units 20 is ensured.

Further, the transfer assembly 144 further includes a second transfer support 1442 for supporting the pressing net pressed on the string unit 20, so as to ensure the structural stability of the string unit 20 during the welding process of the string unit 20.

In some embodiments, the transfer mechanism 14 includes a positioning platform 143 and a relay assembly 144, and the first relay holder 1441 is located on a side of the positioning platform 143 facing away from the receiving platform 11. Therefore, the solder strip 212 is firstly positioned by the slot 1431 of the positioning platform 143 and then jacked up by the first middle support 1441, so that the stringer 10 has high working efficiency and yield.

Optionally, the positioning platform 143 further has a transfer groove 1432 penetrating the positioning platform 143 in the vertical direction and communicating with the passage 1421a, and an end of the first transfer support 1441 close to the receiving platform 11 is located in the transfer groove 1432. At this time, the first intermediate supporting member 1441 can directly support the string unit 20 above the positioning platform 143, so as to avoid the problem that the welding quality is not good due to the displacement of the welding strip 212 after the string unit 20 flows out of the positioning platform 143.

In some embodiments, referring to fig. 3 and 8, the stringer 10 has a preheating station a and a welding station b, the welding mechanism 15 includes a preheating assembly 151 located at the preheating station a and a welding assembly 152 located at the welding station b, and the transport mechanism 14 is further configured to transport the string unit 20 to the preheating station a and the welding station b in sequence.

In actual operation, the surface of the solder strip 212 contacting the battery piece 211 is coated with flux. The conveying mechanism 14 conveys the string unit 20 to the preheating station a, the preheating assembly 151 preheats the string unit 20 and the soldering flux thereon, and then the conveying mechanism 14 conveys the string unit 20 from the preheating station a to the soldering station b, and the soldering assembly 152 solders the string unit 20. Therefore, the soldering flux is subjected to preheating treatment before welding, so that the quality of welding spots is improved, and the connection effect of the battery piece 211 and the welding strip 212 is improved.

As can be appreciated, the transfer assembly 144 is provided at the welding station b to facilitate welding of the string units 20 supported on the transfer assembly 114. In addition, the positioning platform 143 may be only disposed at the preheating station a, and the solder strip 212 of the string unit 20 can be position-corrected under the guidance of the slot on the positioning platform 143 while the string unit 20 is preheated. The positioning platform 143 can also be disposed at the preheating station a and the welding station b, after the welding of the string unit 20 is completed, the transfer assembly 114 descends to enable the welded string unit 20 to fall on the positioning platform 143, and at this time, the connection portion between the welded string unit 20 and the string unit 20 to be welded can be accurately connected under the guidance of the clamping groove on the positioning platform 143, so that the yield is improved.

The preheating assembly 151 may include heating members such as heating rods and resistance wires, and at this time, the preheating assembly 151 may be placed in the positioning platform 143, so that the positioning platform 143 becomes a heating platform, and when the welding strip 212 is guided to move, the string unit 20 is preheated. The preheating assembly 151 may also adopt a combination of a welding box and an infrared lamp, the welding box is used to cover the string unit 20 to prevent heat loss, and then infrared light emitted by the infrared lamp preheats the soldering flux in the string unit 20.

The welding assembly 152 may also be a combination of a welding box and an infrared lamp, the welding box covers the string unit 20 to prevent heat loss, and then the infrared light emitted by the infrared lamp melts the flux. Of course, the form of the welding assembly 152 is not limited thereto, and will not be described in detail herein.

It should be noted that the welded string unit 20 can be removed from the first transfer support 1441 by other equipment, such as a robot, or the stringer 10 further has a blanking station c, and the welded string unit 20 can be taken up by the conveyor 1421 and then sent to the blanking station c, or the welded string unit 20 can be sent to the blanking station c by the transfer assembly 144 and taken out from the blanking station c by a take-up mechanism, such as a robot. The specific manner is not limiting in this application.

Further, the welding assembly 152 further includes a welding pressing net and a pressing net driving member, wherein the pressing net driving member is connected to the welding pressing net and used for driving the welding pressing net to press down on the string unit 20 located at the welding station b, so that the battery sheet 211 is reliably connected with the welding strip 212.

In some embodiments, referring to fig. 3, the stringer 10 further includes a screen press circulation mechanism 16, the screen press circulation mechanism 16 including a screen press feeding assembly 161, a screen press blanking assembly 162, and a screen press conveying assembly 163. The net pressing and feeding assembly 161 is used for pressing and arranging a net on the string unit 20 of the receiving platform 11, the net pressing and discharging assembly 162 is used for taking down the net pressed and arranged on the welded string unit 20, and the net pressing and conveying assembly 163 is used for conveying the net pressed and taken down by the net pressing and discharging assembly 162 to the net pressing and feeding assembly 161. The transport mechanism 14 is also used to hold and transport the press wire pressed onto the string unit 20.

In actual operation, after the welding strip 212 and the battery piece 211 form the structural unit 21, the net pressing and feeding assembly 161 carries the net pressing to the receiving platform 11 and presses the net pressing on the battery piece 211, so that the net pressing compresses the welding strip 212 and the battery piece 211, and the welding strip 212 and the battery piece 211 are prevented from shifting during conveying of the string unit 20. After the string unit 20 is welded, the structure becomes stable, and the net pressing and blanking assembly 162 removes the net pressing from the welded string unit 20. The net pressing and conveying component 163 conveys the net pressing taken off by the net pressing and blanking component 162 back to the net pressing and feeding component 161, so as to facilitate the recycling of the net pressing.

The net pressing feeding assembly 161 and the net pressing discharging assembly 162 may be a mechanism capable of carrying a net pressing, such as a robot or a crown block. The web-pressing conveying assembly 163 may employ a conveying belt, a conveying roller, a conveying platform, or the like capable of supporting and conveying the web-pressing.

In some embodiments, referring to fig. 9, the receiving platform 11 includes a first receiving portion 111 and a second receiving portion 112 connected, the first receiving portion 111 is used for receiving the battery sheet 211, and the second receiving portion 112 is used for receiving the solder strip 212. At this time, the first receiving part 111 and the second receiving part 112 are used to position and arrange the solder ribbon 212 and the battery sheet 211, so that the string unit 20 including one structural unit 21 can be formed with an accurate arrangement position. Of course, in other embodiments, the receiving platform may also include a plurality of first receiving portions 111 and a plurality of second receiving portions 112, and the first receiving portions 111 and the second receiving portions 112 are sequentially connected along the first horizontal direction. In this way, a string unit 20 comprising a plurality of structural units 21 can be built on one receiving platform 11.

In some embodiments, referring to fig. 10, 11 and 12, the number of receiving platforms 11 is plural, the plural receiving platforms 11 are arranged in sequence along the first horizontal direction, the stringer 10 further includes a variable-pitch driving assembly 13, the variable-pitch driving assembly 13 is configured to drive two adjacent receiving platforms 11 to approach each other along the first horizontal direction so as to move the plural receiving platforms 11 to the mating position; in the mating position, the first receiving portion 111 of the jth receiving platform 11 is located above the second receiving portion 112 of the (j + 1) th receiving platform 11, so that the lower surface of the battery piece 211 located on the first receiving portion 111 of the jth receiving platform 11 is located above the solder strip 212 on the second receiving portion 112 of the (j + 1) th receiving platform 11, and j is a positive integer.

In actual operation, after the positions of the solder strips 212 and the battery pieces 211 of each receiving platform 11 are arranged, the variable-pitch driving assembly 13 drives each receiving platform 11 to approach each other, so that the battery pieces 211 of the two adjacent receiving platforms 11, the lower surfaces of which are in the unconnected state, are located on the upper side of the solder strips 212 in the unconnected state, so that the structural units 21 arranged on each receiving platform 11 are sequentially arranged to construct the string unit 20 including a plurality of structural units 21, and the welding efficiency of the string welding machine 10 is improved.

Further, the first receiving portion 111 has a space-saving portion 1113 communicating with the long groove 114, and the space-saving portion 1113 penetrates the first receiving portion 111. The clearance 1113 is provided not only to allow the conveyor to move, but also to expose the lower surface of the battery sheet 211 on the first receiving portion 111 to the second portion of the solder strip 212 on the adjacent receiving platform 11 through the clearance 1113 when the receiving platforms 11 are mated, so as to facilitate the construction of the string unit 20.

In the embodiment, referring to fig. 12 and 13, the pitch driving assembly 13 includes a plurality of pitch driving members 131, one receiving platform 11 of the plurality of receiving platforms 11 is fixedly disposed, one pitch driving member 131 is connected to each other receiving platform 11 of the plurality of receiving platforms 11, and each pitch driving member 131 is used for driving the connected receiving platform 11 to move to the matching position. At this time, one of the receiving platforms 11 is fixedly arranged, which is beneficial to reducing the number of driving mechanisms, reducing the manufacturing cost of the stringer and facilitating the control.

Further, the pitch drive assembly 13 further includes a plurality of support plates 132, one pitch drive member 131 is connected to one support plate 132, and one support plate 132 is correspondingly provided with one receiving platform 11. In actual operation, the pitch drive member 131 drives the support plate 132 to move so as to drive the receiving platforms 11 to move, so that the receiving platforms 11 approach each other and move to the matching position.

The pitch drive 131 may be a linear motor or an air cylinder.

Furthermore, the first receiving part 111 is provided with an air hole 1111, the air hole 1111 is communicated with a negative pressure device, and the suction force generated by the negative pressure device passes through the air hole 1111 and then acts on the battery piece 211 on the first receiving part 111, so that the battery piece 211 can be stably supported by the first receiving part 111.

Further, the second receiving portion 112 is provided with a groove 1121 extending along the first horizontal direction. When the second portion of the solder ribbon 212 is supported by the second receiving portion 112, the second portion of the solder ribbon 212 is located in the recess 1121, and the positive direction of downward swing is guided by the recess 1121 to avoid the second portion of the solder ribbon 212 from being dislocated. It is understood that the number of the grooves 1121 may be greater than or equal to the number of the solder strips 212 in one structural unit 21 to adapt to the construction of different grid numbers of the string units 20 (the grid number is the number of the solder strips 212 in the structural unit 21). In addition, the arrangement intervals of the grooves 1121 are arranged according to the actual cell piece 211 structure, and are not limited herein.

Further, an end of the groove 1121, which is away from the first receiving portion 111, is flared, and a width of a side of the groove 1121, which is away from the first receiving portion 111, is greater than a width of a side of the groove which is close to the first receiving portion 111, so as to facilitate guiding the welding strip 212 into the groove 1121.

Further, the first receiving portion 111 includes a plurality of receiving bars 1112 arranged at intervals along the second horizontal direction, the second receiving portion 112 has a plurality of avoiding grooves 1122 thereon, and one avoiding groove 1122 is correspondingly located in a direction opposite to the extending direction of one receiving bar 1112. In actual operation, in two adjacent receiving platforms 11, the receiving strip 1112 of the first receiving portion 111 of one receiving platform 11 can be inserted into the avoiding groove 1122 of the other receiving platform 11, so that the lower surface of the battery piece 211 is located on the upper side of the adjacent solder strip 212. It will be appreciated that the receiving strip 1112 is adapted to hold the cell and that the receiving strip 1112 may be provided with air holes 1111.

In some embodiments, the receiving platform 11 further has a bending hole 113, the bending hole 113 is located between the first receiving portion 111 and the second receiving portion 112, the series welding machine 10 further includes a bending mechanism 12, the bending mechanism 12 includes two bending members disposed on two sides of the receiving platform 11 in the vertical direction, the two bending members are configured to be controlled to approach or move away from each other along the bending hole 113, and can cooperate with the bending solder strip 212 when the two bending members approach each other to the first position.

In actual operation, after the string unit 20 is arranged, the bending mechanism 12 is activated to move the two bending members toward each other along the bending holes 113 to the first position and bend the solder ribbon 212. Thus, the bending process is concentrated on the receiving platform 11, the welding strips 212 are bent after the relative positions of the welding strips 212 and the battery pieces 211 are well arranged, the positional relationship between the bent positions of the welding strips 212 and the battery pieces 211 can be accurate without high operation precision, and the manufacturing cost of the series welding machine 10 is reduced.

It can be understood that, the number of the bending holes 113 on the receiving platform 11 may be one, the bending holes 113 extend along the second horizontal direction, and the plurality of bending members of the bending mechanism 12 all move along the bending holes 113 to bend the plurality of solder strips 212. The receiving platform 11 may also have a plurality of bending holes 113, and each bending hole 113 corresponds to one bending member and bends one solder strip 212.

The bending mechanism 12 may be disposed corresponding to each receiving platform 11, and the corresponding bending mechanism 12 is used to bend the solder strip 212 on each receiving platform 11, or a plurality of receiving platforms 11 may be disposed corresponding to one bending mechanism 12, and the bending mechanism 12 may move to each receiving platform 11 to bend the solder strip 212, or each receiving platform 11 may move to the bending mechanism 12, so that the bending mechanism 12 bends the solder strip 212 thereon.

The stringer 10 that provides in the embodiment of this application, utilize and accept platform 11 and construct string unit 20, string unit 20 that transmission assembly 142 received is all the string unit 20 that has already been built, when accepting string unit 20 on platform 11 when constructing the in-process, the string unit 20 that has already been built on transmission assembly 142 is being conveyed or is being welded, transmission assembly 142 need not wait to carry on string unit 20 after string unit 20 constructs and finishes, transmission assembly 142's transmission efficiency improves greatly, and then improved the welding efficiency of welding mechanism 15, and then improved the work efficiency of whole stringer 10.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A series welding machine is characterized by comprising a bearing platform (11), a conveying mechanism (14) and a welding mechanism (15);

the bearing platform (11) is used for supporting the string unit (20), and the string unit (20) comprises a welding strip (212) and a battery piece (211) which are sequentially overlapped along a first horizontal direction;

the conveying mechanism (14) comprises a handling assembly (141) and a transmission assembly (142), the handling assembly (141) is used for conveying the string units (20) on the bearing platform (11) to the transmission assembly (142), and the transmission assembly (142) is used for conveying the string units (20) to the welding mechanism (15);

the welding mechanism (15) is used for welding the welding strips (212) and the battery sheets (211) of the string unit (20).

2. The stringer according to claim 1, wherein said transport assembly (142) comprises a conveyor belt (1421), said conveyor belt (1421) being arranged along said first horizontal direction;

the conveyor belt (1421) is provided with a channel (1421a) extending along the first horizontal direction, and when the conveyor belt (1421) moves, the carrying assembly (141) can move to the channel (1421a) so as to convey the string unit (20) from the receiving platform (11) to the conveyor belt (1421).

3. The stringer according to claim 2 wherein said channel (1421a) divides said conveyor belt (1421) into a plurality of sub-conveyor belts (1421 b);

the transmission assembly (142) further comprises a plurality of guide wheels (1421c) which rotate synchronously, the plurality of guide wheels (1421c) are arranged at intervals along a second horizontal direction perpendicular to the first horizontal direction, and each guide wheel (1421c) is correspondingly connected to one sub-conveyor belt (1421b) and used for driving the corresponding sub-conveyor belt (1421b) to move.

4. A stringer according to claim 2, wherein said solder ribbon (212) of said string unit (20) on said conveyor belt (1421) is located in said channel (1421 a);

the conveying mechanism (14) further comprises a positioning platform (143) located below the conveying belt (1421), the positioning platform (143) is provided with a clamping groove (1431) extending along the first horizontal direction, and the clamping groove (1431) is located below the channel (1421a) and used for supporting and guiding the welding belt (212) in the channel (1421a) to walk.

5. A stringer according to claim 2, wherein said transfer mechanism (14) further comprises a transit assembly (144), said transit assembly (144) being located at least partially at said welding mechanism (15);

the transfer assembly (144) includes a first transfer support (1441), the first transfer support (1441) being located below the passage (1421a) and configured to be raised and lowered along the passage (1421a) to prop up the string unit (20) on the conveyor belt (1421);

the conveyor belt (1421) is further configured to move in reverse to an initial position after the first intermediate support (1441) props up the string unit (20).

6. The stringer according to claim 5, wherein the end of the first transfer carriage (1441) facing away from the receiving platform (11) is located outside the welding mechanism (15).

7. A stringer according to claim 1, wherein said receiving platform (11) further has an elongated slot (114) extending in said first horizontal direction, said elongated slot (114) extending through a receiving surface of said receiving platform (11);

the carrying assembly (141) comprises a carrying driving member (1411) and a carrying member (1412), the carrying driving member (1411) is connected with the carrying member (1412), and the carrying driving member (1411) is used for driving the carrying member (1412) to ascend along the long groove (114) so that the carrying member (1412) holds the string units (20) and driving the carrying member (1412) to convey the string units (20) to the conveying assembly (142).

8. The stringer according to claim 7, wherein said handling member (1412) includes a plurality of elongated bars (1412a) spaced apart in a second horizontal direction perpendicular to said first horizontal direction, and said receiving platform (11) includes a plurality of said elongated slots (114);

the carrying driving piece (1411) is used for driving the long rods (1412a) to move synchronously, and each long rod (1412a) can be correspondingly accommodated in one long groove (114);

when the string unit (20) is supported by the receiving platform (11), the carrying driving member (1411) drives the plurality of long rods (1412a) to hold and convey the string unit (20) to the conveying assembly (142).

9. A stringer according to claim 1, wherein said stringer has a preheating station (a) and a welding station (b), said welding means (15) comprising a preheating assembly (151) at said preheating station (a) and a welding assembly (152) at said welding station (b), said transfer means (14) being further adapted to transport said stringer unit (20) in sequence to said preheating station (a) and to said welding station (b).

10. The stringer according to claim 1 further comprising a screen press circulation mechanism (16), wherein the screen press circulation mechanism (16) comprises a screen press feeding assembly (161), a screen press blanking assembly (162) and a screen press conveying assembly (163);

the net pressing and feeding assembly (161) is used for pressing a net on the string unit (20) of the bearing platform (11), the net pressing and discharging assembly (162) is used for taking down the net pressing pressed on the welded string unit (20), and the net pressing and conveying assembly (163) is used for conveying the net pressing taken down by the net pressing and discharging assembly (162) to the net pressing and feeding assembly (161);

the conveying mechanism (14) is also used for supporting and conveying the press net pressed on the string unit (20).

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