Multi-station unwinding device and method

Abstract

The invention relates to a welding strip supply device and method, in particular to a multi-station unwinding device and method, and aims to overcome the defect that existing market equipment generally adopts a single unwinding disc mechanism and cannot meet the requirement of large-scale production. The multi-station unwinding device comprises a switching part and a plurality of unwinding units. Each unwinding unit comprises a strip supply unit, a strip winding unit, a strip storage unit and a wire clamping unit which are sequentially arranged along a welding strip path, and a plurality of wire passing wheel sets; the tape supply unit supports the configuration of 1-30 rotating shafts, so that different capacity requirements are met; the strip storage unit provides independent tension control to ensure that the tension of the welding strip is consistent; when one unwinding unit operates normally, other unwinding units can be maintained or replaced at the same time, the multiple unwinding units can be rapidly switched through the switching component, and the unwinding units which are operating do not need to be interfered.

Description

Technical Field

[0001] The invention relates to a welding strip supply device and method, and in particular to a multi-station unwinding device and method. Background Art

[0002] With the continuous advancement of photovoltaic module packaging technology, the demand for the number of welding ribbons in string welding equipment continues to increase, from the early two-grid, three-grid, and four-grid to the current 10-grid (multi-busbar string welding machine) and 16-grid (shingled multi-busbar string welding machine), and more grids may be needed in the future. However, the increase in the number of welding ribbons has led to a significant increase in the number of unwinding reels on the equipment, which not only occupies more equipment space, but also prolongs the time for manual replacement of welding ribbons.

[0003] Existing equipment usually adopts a single-axis unwinding design, that is, each unwinding mechanism is driven by a motor and a rotating shaft, on which an unwinding reel is installed. For example, a 16-grid shingled multi-main-grid string welding machine needs to be equipped with 16 unwinding reels. The welding ribbon is used for about 20 hours and is basically exhausted at the same time. It takes 1 to 2 hours to manually replace the welding ribbon reel and continue the welding ribbon, which increases the equipment downtime and affects production efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing market equipment generally adopts a single unwinding reel mechanism and cannot meet the needs of large-scale production, and to provide a multi-station unwinding device and method.

[0005] In order to solve the deficiencies of the above-mentioned prior art, the present invention provides the following technical solutions:

[0006] A multi-station unwinding device is special in that it comprises a switching part and a plurality of unwinding units arranged in sequence along a vertical direction;

[0007] The switching part is used to switch different unwinding units, and includes a fixed plate, a switching cylinder arranged on the fixed plate, and a vertical guide rail; a connecting plate is arranged on the vertical guide rail, and the connecting plate is connected to the driving end of the switching cylinder; the wire clamping units of the multiple unwinding units are arranged on the connecting plate in sequence along the vertical direction;

[0008] Each of the unwinding units comprises a tape supply unit, a tape winding unit, a tape storage unit and a wire clamping unit which are sequentially arranged along the welding tape path;

[0009] The tape supply unit is used to provide the welding tape, and comprises a tape supply base plate, A rotating shafts vertically arranged on the tape supply base plate, and each rotating shaft is provided with B independently rotating welding tape pay-off disks, A=1-30, B=1-2;

[0010] The tape winding unit is used to change the direction of the welding tape, and comprises a tape winding base plate, A second tape winding shafts vertically arranged on the tape winding base plate and parallel to the rotation axis, and each second tape winding shaft is sleeved with B passing wheels;

[0011] The tape storage unit is used to control the tension of each solder tape on each solder tape pay-off reel, and includes a plurality of guide rails that are consistent with the number of solder tapes;

[0012] The wire clamping unit includes B wire pressing base plates and a plurality of positioning pins; each wire pressing base plate is horizontally arranged on the connecting plate, and a wire passing slot plate, a wire pressing block unit, and a wire pressing cover plate are sequentially arranged on its upper surface along the length direction of the welding strip; a plurality of wire grooves are arranged on the wire passing slot plate perpendicular to the length direction of the welding strip, and each wire groove is connected along the length direction of the welding strip and is used to pass a welding strip; the wire pressing block unit includes a plurality of wire pressing blocks corresponding to the plurality of wire grooves one by one; the wire pressing cover plate is used to press the welding strip onto the top surface of the wire pressing base plate; the plurality of positioning pins are used to fix the corresponding wire pressing base plate on the work station after the manual wire pressing is completed;

[0013] At least one wire passing wheel group is arranged between the tape winding unit and the tape storage unit, and multiple wire passing wheel groups are arranged between the tape storage unit and the wire clamping unit. Each of the wire passing wheel groups includes B wire passing wheels parallel to the rotating axis, and the B wire passing wheels are coaxial and arranged in sequence along the axis.

[0014] Furthermore, each of the rotating shafts includes B unwinding shafts which are sequentially sleeved from the inside to the outside and have decreasing lengths. The first solder strip unwinding shaft is sleeved on the portion of the first unwinding shaft extending out of the second unwinding shaft, and the remaining solder strip unwinding shafts are similar in nature. Two adjacent unwinding shafts are connected by a rotating bearing.

[0015] Furthermore, the tape supply unit also includes A first tape winding shafts vertically arranged on the tape supply base plate and corresponding to the A rotating shafts, each rotating shaft and the corresponding first tape winding shaft constitute a tape supply group; each first tape winding shaft is sleeved with B rollers.

[0016] Furthermore, each of the tape storage units comprises a base, a vertical plate, two guide rail units and two limit units;

[0017] The vertical plate is vertically arranged on the top surface of the base;

[0018] Each of the guide rail units includes B guide rail shafts parallel to the rotation axis, there is a gap between each guide rail shaft and the vertical plate, and both ends are connected to the vertical plate through support rods, and a plurality of parallel circumferential rings are arranged on the side wall of the guide rail shaft as the guide rail;

[0019] The two limit units correspond to the two guide rail units respectively and are respectively arranged on two sides of the vertical plate, and each limit unit includes B limit switches;

[0020] The heights of the guide shafts of the same guide rail unit are the same, and all the guide shafts of one guide rail unit are located below all the guide shafts of another guide rail unit, and the gaps between them and the vertical plates are larger.

[0021] Furthermore, the width of each of the wire grooves is 0 to 3 mm greater than the width of the welding strip;

[0022] A pressing block adapted to the wire groove is arranged on the side of each wire pressing block close to the wire groove, and the pressing block passes through the guide groove. The wire pressing block and the pressing block are used to press the welding strip onto the top surface of the wire pressing bottom plate;

[0023] The top surface of the pressing block is an inclined surface.

[0024] Furthermore, there is one wire passing wheel set between the tape winding unit and the tape storage unit, and the wire passing wheel set is arranged on the side of the tape winding bottom plate close to the tape storage unit through a support plate, and the B wire passing wheels of the wire passing wheel set correspond to the B guide rail shafts respectively;

[0025] The number of wire-passing wheel groups arranged between the tape storage unit and the wire-holding unit is 3 to 4, and they are parallel to each other. One of the wire-passing wheel groups is located on the side of the wire-pressing base plate close to the tape storage unit and is connected to the connecting plate. The B wire-passing wheels of the wire-passing wheel group correspond to the B wire-pressing base plates respectively and are correspondingly arranged on the connecting plates; the remaining wire-passing wheel groups are located above the vertical plate and the guide rail shaft, and the B wire-passing wheels of each wire-passing wheel group correspond to the B guide rail shafts respectively.

[0026] Furthermore, the number of the unwinding units is two, and the two unwinding units are symmetrically arranged up and down;

[0027] The tape supply bottom plate and the tape winding bottom plate of each unwinding unit are both vertically arranged.

[0028] A multi-station unwinding method, using the multi-station unwinding device, is special in that it comprises the following steps:

[0029] Step 1: When one of the unwinding units is in normal use, manually perform the following operations on the adjacent unwinding unit:

[0030] Replace the welding tape pay-off reel on the A rotation axis of another adjacent unwinding unit;

[0031] The solder tape of the jth solder tape pay-off reel of the i-th rotating shaft is passed around the jth passing wheel of the i-th second winding shaft to change the direction of the solder tape, and then passed around the corresponding guide rail on the storage unit, and then the solder tape is pulled to the jth wire pressing bottom plate, passed through the corresponding wire groove, and then the corresponding wire pressing block is used to press the solder tape on the top surface of the wire pressing bottom plate to complete the wire pressing, and finally the jth wire pressing bottom plate is fixed to the work station using multiple positioning pins; wherein, i=1, ..., A; j=1, ..., B;

[0032] Step 2: After the welding strip of the unwinding unit in normal use is used up, the connecting plate is driven to move in the vertical direction by switching the cylinder to switch to another adjacent unwinding unit processed in step 1.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] (1) The present invention discloses a multi-station unwinding device, comprising a switching part and a plurality of unwinding units; each unwinding unit comprises a tape supply unit, a tape winding unit, a tape storage unit and a wire clamping unit arranged in sequence along a welding tape path, and a plurality of wire passing wheel groups; the tape supply unit supports 1 to 30 rotation axis configurations to meet different capacity requirements; the tape storage unit provides independent tension control to ensure consistent tension of the welding tape; when one unwinding unit is operating normally, other unwinding units can be maintained or replaced at the same time, and multiple unwinding units can be quickly switched through a switching component without interfering with the unwinding units in operation.

[0035] (2) The multi-station design of the present invention has higher flexibility and scalability, and the number of unwinding units can be increased as needed to adapt to various production scales and process requirements.

[0036] (3) The present invention discloses a multi-station unwinding method. Through the switching design of multiple unwinding units, when one unwinding unit is running, the solder tape pay-off reel of the adjacent unwinding unit is manually replaced and the path wiring is performed. After the solder tape of the current unwinding unit is exhausted, the unwinding unit is quickly switched to the prepared unwinding unit to continue the operation, which greatly reduces the downtime. And the switching mechanism realizes seamless switching to ensure the continuity of equipment operation, thereby improving the overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of an axonometric view of an embodiment of a multi-station unwinding device of the present invention Figure 1 ;

[0038] Figure 2 A schematic diagram of an axonometric view of an embodiment of the present invention Figure 2 ;

[0039] Figure 3 It is a schematic structural diagram of two tape storage units, seven wire-passing wheel groups, two wire-clamping units and a switching unit in an embodiment of the present invention;

[0040] Figure 4 for Figure 3 Axonometric diagram of the tape storage unit and two wire-passing wheel assemblies at the bottom Figure 1 ;

[0041] Figure 5 for Figure 3 Axonometric diagram of the tape storage unit and two wire-passing wheel assemblies at the bottom Figure 2 ;

[0042] Figure 6 It is a schematic structural diagram of two wire-passing wheel groups, two wire-gripping units and a switching part in an embodiment of the present invention;

[0043] Figure 7 This is a schematic structural diagram of the top surface of the wire pressing bottom plate in an embodiment of the present invention;

[0044] Figure 8 It is a cross-sectional view of a wire pressing bottom plate, a wire passing trough plate, a wire pressing block, and a wire pressing cover plate in an embodiment of the present invention;

[0045] Fig. 9 It is a structural schematic diagram of a wire pressing block and a pressing block in an embodiment of the present invention;

[0046] Fig.10 It is a schematic structural diagram of a first unwinding shaft and a second unwinding shaft in an embodiment of the present invention, wherein a welding tape pay-off drum is sleeved on the first unwinding shaft and the second unwinding shaft.

[0047] The reference numerals are as follows: 01 - welding strip;

[0048] 100-unwinding unit;

[0049] 110-tape supply unit; 111-tape supply bottom plate; 112-rotating shaft; 113-welding tape pay-off reel; 114-first tape winding shaft; 115-first unwinding shaft; 116-second unwinding shaft; 117-first cone sleeve; 118-second cone sleeve; 119-shaft end lock buckle; 1120-baffle; 1121-rotating bearing;

[0050] 120-tape winding unit; 121-tape winding bottom plate; 122-second tape winding shaft; 123-passing wheel;

[0051] 130-storage unit; 131-base; 132-vertical plate; 133-guide rail unit; 134-limiting unit; 135-guide rail shaft; 136-support rod;

[0052] 140-line wheel set;

[0053] 150-cable clamping unit; 151-cable pressing base plate; 152-cable trough plate; 153-cable pressing block; 154-locking nut; 155-cable pressing cover plate; 156-locating pin; 157-pressing block;

[0054] 200 - switching part; 210 - switching cylinder; 220 - vertical guide rail; 230 - connecting plate. DETAILED DESCRIPTION

[0055] The present invention will be further described below in conjunction with the accompanying drawings and exemplary embodiments.

[0056] Reference Figures 1 to 3A multi-station unwinding device includes a switching part 200 and a plurality of unwinding units 100 arranged in sequence along a vertical direction.

[0057] The switching part 200 is used to switch different unwinding units 100, and includes a fixed plate, a switching cylinder 210 arranged on the fixed plate, and a vertical guide rail 220; a connecting plate 230 is arranged on the vertical guide rail 220, and the driving end of the switching cylinder 210 is connected to the connecting plate 230 to drive the connecting plate 230 to move in the vertical direction; in this embodiment, the multiple unwinding units 100 are two unwinding units 100 symmetrically arranged up and down.

[0058] Each unwinding unit 100 includes a tape supply unit 110 , a tape winding unit 120 , a wire passing wheel set 140 , a tape storage unit 130 , a plurality of wire passing wheel sets 140 and a wire clamping unit 150 , which are sequentially arranged along the path of the welding tape 01 .

[0059] The tape supply unit 110 is used to provide the welding tape 01 , and includes a vertically arranged tape supply base plate 111 and A tape supply groups vertically arranged on the tape supply base plate 111 , where A=1 to 30. Each tape supply group includes a rotating shaft 112 and a first tape winding shaft 114 .

[0060] Reference Fig.10 , each rotating shaft 112 is sleeved with B solder tape pay-off drums 113, B=2, the solder tape 01 on the solder tape pay-off drum 113 is completely consumed and needs to be replaced manually; each rotating shaft 112 includes B unwinding shafts which are sleeved in sequence from the inside to the outside and whose lengths decrease, the first solder tape pay-off drum 113 is sleeved on the part of the first unwinding shaft 115 extending out of the second unwinding shaft 116, and a first cone sleeve 117 is arranged between both ends of the first solder tape pay-off drum 113; an end of the first unwinding shaft 115 away from the second unwinding shaft 116 is fixedly connected with an axis end lock buckle 119; the second unwinding shaft is sleeved with the second solder tape pay-off drum 113, and a second cone sleeve 118 and a baffle 1120 are respectively arranged between both ends of the second solder tape pay-off drum 113, and the baffle 1120 is arranged away from the first solder tape pay-off drum 113; the second unwinding shaft 116 is connected to the first unwinding shaft 115 through a rotating bearing 1121. Therefore, B welding tape pay-off reels 113 can rotate independently without being affected by other welding tape pay-off reels 113. Even if a welding tape pay-off reel 113 needs to be replaced or maintained, other welding tape pay-off reels 113 can still operate normally. In addition, due to the independent rotation design, each welding tape pay-off reel 113 responds independently according to the traction tension required by its welding tape, avoiding the tension unevenness caused by linkage. In addition, since the welding tape pay-off reel 113 only rotates when needed, its rotation energy consumption and mechanical wear are reduced, which helps to extend the service life of the equipment.

[0061] Each first winding shaft 114 is sleeved with B rollers for winding the welding tape 01 , and the functions of the rollers are to change the direction of the welding tape, adjust the tension and stabilize the transmission of the welding tape.

[0062] The tape winding unit 120 is used to change the direction of the welding tape 01, which includes a vertically arranged tape winding base plate 121, A second tape winding shafts 122 vertically arranged on the tape winding base plate 121 and parallel to the rotating axis 112, and each second tape winding shaft 122 is sleeved with B passing wheels 123, and the passing wheels 123 are used to change the direction of the welding tape 01 from a vertical direction to a nearly horizontal direction.

[0063] Reference Figures 4 to 6 The tape storage unit 130 is used to control the tension of each solder tape 01 on each solder tape pay-off reel 113, and includes a plurality of guide rails that are the same in number as the solder tapes 01, to ensure that each solder tape 01 can float up and down independently.

[0064] Each tape storage unit 130 includes a base 131 , a vertical plate 132 , two guide rail units 133 and two position limiting units 134 ; the vertical plate 132 is vertically disposed on the top surface of the base 131 .

[0065] Each guide rail unit 133 includes B guide rail shafts 135 parallel to the rotating axis 112. There is a gap between each guide rail shaft 135 and the vertical plate 132, and both ends are connected to the vertical plate 132 through support rods 136. A plurality of parallel circumferential rings are arranged on the side wall of the guide rail shaft 135, and each circumferential ring is used as a guide rail for a welding strip 01.

[0066] The height of the guide shafts 135 of the same guide rail unit 133 is the same, and all the guide shafts 135 of one guide rail unit 133 are located below all the guide shafts 135 of another guide rail unit 133, and the gap between the vertical plate 132 is larger to accommodate a smaller spacing. The two limit units 134 correspond to the two guide rail units 133, and are respectively arranged on both sides of the vertical plate 132. Each limit unit 134 includes B limit switches corresponding to B guide shafts 135.

[0067] Reference Figure 8, the wire clamping units 150 of the two unwinding units 100 are arranged on the connecting plate 230 in sequence along the vertical direction; each wire clamping unit 150 includes B wire pressing bottom plates 151 and 2B positioning pins 156; each wire pressing bottom plate 151 is horizontally arranged on the connecting plate 230, and its upper surface is sequentially provided with a wire passing slot plate 152, a wire pressing block unit, and a wire pressing cover plate 155 along the length direction of the welding strip 01; a plurality of wire grooves (positioning function, to prevent the welding strip from sliding or deflecting laterally when clamping) are arranged on the wire passing slot plate 152 perpendicular to the length direction of the welding strip 01, each wire groove is connected along the length direction of the welding strip 01 and is used to pass through a welding strip 01, and the groove width of each wire groove is greater than the width of the welding strip 01 by 0.5 to 1 mm; the wire pressing block unit includes a plurality of wire pressing blocks 153 corresponding to the plurality of wire grooves one by one. In other embodiments, the groove width of each wire groove is greater than the width of the welding strip 01 and can be 0 to 3 mm.

[0068] Reference Fig. 9 A pressing block 157 adapted to the wire groove is arranged on the side of each pressing block 153 close to the wire groove. The top surface of the pressing block 157 is an inclined surface. The pressing block 157 passes through the wire groove. The pressing block 153 and the pressing block 157 are used to press the welding strip 01 onto the top surface of the pressing bottom plate 151.

[0069] The wire crimping cover plate 155 is used to press the welding strip 01 onto the top surface of the wire crimping base plate 151. The wire crimping cover plate 155 is installed on the wire crimping base plate 151 using six locking nuts 154. After manual crimping is completed, each wire crimping cover plate 155 is fixed to the work station by two positioning pins 156.

[0070] Reference Figures 1 to 6Each wire-passing wheel group 140 includes B wire-passing wheels parallel to the rotating axis 112, and the B wire-passing wheels are coaxial and arranged in sequence along the axis; a wire-passing wheel group 140 is arranged between the second winding axis 122 of the tape winding unit 120 and the guide axis 135 of the tape storage unit 130, and the wire-passing wheel group 140 is arranged on the side of the tape winding bottom plate 121 close to the tape storage unit 130 through a support plate, and the B wire-passing wheels of the wire-passing wheel group 140 correspond to the B guide axis 135 respectively, and are used to transition the welding ribbon 01 from the horizontal path to the guide rail of the tape storage unit 130; mutually connected wires are arranged between the guide axis 135 of the tape storage unit 130 and the wire pressing bottom plate 151 of the wire clamping unit 150 There are 3 to 4 parallel wire-passing wheel groups 140, one of which is located on the side of the wire-pressing bottom plate 151 close to the tape storage unit 130 and connected to the connecting plate 230, and is used to position the welding tape 01 so that the welding tape 01 can smoothly enter the wire-holding unit 150. The B wire-passing wheels of the wire-passing wheel group 140 correspond to the B wire-pressing bottom plates 151, and are correspondingly arranged on the connecting plate 230; the remaining wire-passing wheel groups 140 are located above the vertical plate 132 and the guide rail shaft 135, and the B wire-passing wheels of each wire-passing wheel group 140 correspond to the B guide rail shafts 135, which saves space and provides additional support for the path of the welding tape 01. Through multiple distribution positions, the welding tape 01 is guided to gradually transition to the fixed position of the wire-holding unit 150 to avoid the deviation of the welding tape 01. Each wire-passing wheel group 140 can be adjusted and optimized according to different production needs to adapt to different types of welding tape specifications and equipment configurations.

[0071] Taking the lower unwinding unit 100 as an example, the direction of the welding tape 01 of the i-th supply tape group is as follows: the j-th welding tape unwinding disk 113 of the i-th supply tape group, the j-th roller of the i-th first winding shaft 114, the j-th passing wheel 123 of the i-th second winding shaft 122, the j-th passing wheel of a passing wheel group 140, the j-th guide shaft 135 of a guide rail unit 133, the j-th passing wheels of three passing wheel groups 140, the j-th pressing bottom plate 151, and the welding tape 01 extends from the j-th pressing bottom plate 151 and enters the subsequent process. Among them, i=1, ..., A; j=1, ..., B.

[0072] A multi-station unwinding method, using the multi-station unwinding device, comprises the following steps:

[0073] Step 1: When one of the unwinding units 100 is in normal use, manually perform the following operations on another adjacent unwinding unit 100:

[0074] Replace the welding ribbon unwinding reel 113 on the rotating shaft 112 of another adjacent unwinding unit 100A;

[0075] The welding tape 01 of the j-th welding tape pay-off drum 113 of the i-th rotating shaft 112 is passed around the j-th roller of the i-th first winding shaft 114, and then passed around the j-th passing wheel 123 of the i-th second winding shaft 122 to change the direction of the welding tape 01;

[0076] Then it passes around the j-th wire passing wheel of a wire passing wheel group 140, the corresponding guide rail of the j-th guide rail shaft 135 of a guide rail unit 133, and the j-th wire passing wheels of the three wire passing wheel groups 140;

[0077] Finally, the soldering ribbon 01 is pulled to the j-th wire pressing base plate 151, passed through the corresponding wire groove, and then the corresponding wire pressing block 153 and the pressing block 157 are used to press the soldering ribbon 01 on the top surface of the wire pressing base plate 151 to complete the wire pressing, and then the j-th wire pressing base plate 151 is fixed to the work station using two positioning pins 156; wherein, i=1, ..., A; j=1, ..., B;

[0078] Step 2: After the welding strip 01 of the unwinding unit 100 to be normally used is used up, the connecting plate 230 is driven to move in the vertical direction by switching the cylinder 210 to switch to another adjacent unwinding unit 100 processed in step 1.

Claims

1. A multi-station unwinding device, characterized in that: It comprises a switching part (200) and a plurality of unwinding units (100) arranged in sequence along a vertical direction; The switching part (200) is used to switch between different unwinding units (100), and comprises a fixed plate, a switching cylinder (210) arranged on the fixed plate, and a vertical guide rail (220); a connecting plate (230) is arranged on the vertical guide rail (220), and the connecting plate (230) is connected to the driving end of the switching cylinder (210); Each of the unwinding units (100) comprises a tape supply unit (110), a tape winding unit (120), a tape storage unit (130) and a wire clamping unit (150) which are sequentially arranged along a path of the welding tape (01); the wire clamping units (150) of the plurality of unwinding units (100) are sequentially arranged on a connecting plate (230) along a vertical direction; The tape supply unit (110) is used to provide a welding tape (01), and comprises a tape supply base plate (111), A rotating shafts (112) vertically arranged on the tape supply base plate (111), and each rotating shaft (113) is sleeved with B independently rotating welding tape pay-off disks (113), A=1-30, B=1-2; The tape winding unit (120) is used to change the direction of the welding tape (01), and comprises a tape winding base plate (121), A second tape winding shafts (122) vertically arranged on the tape winding base plate (121) and parallel to the rotation axis (112), and each second tape winding shaft (122) is sleeved with B passing wheels (123); The tape storage unit (130) is used to control the tension of each welding tape (01) on each welding tape pay-off reel (113), and comprises a plurality of guide rails that are the same in number as the welding tapes (01); The wire clamping unit (150) comprises B wire pressing base plates (151) and a plurality of positioning pins (156); each wire pressing base plate (151) is horizontally arranged on the connecting plate (230), and a wire passing slot plate (152), a wire pressing block unit, and a wire pressing cover plate (155) are sequentially arranged on the upper surface thereof along the length direction of the welding strip (01); a plurality of wire grooves are arranged on the wire passing slot plate (152) perpendicular to the length direction of the welding strip (01), and each wire groove is used to pass a welding strip (01); the wire pressing block unit comprises a plurality of wire pressing blocks (153) corresponding to the plurality of wire grooves one by one; the wire pressing cover plate (155) is used to press the welding strip (01) onto the top surface of the wire pressing base plate (151); the plurality of positioning pins (156) are used to fix the corresponding wire pressing base plate (151) on the work station after manual wire pressing is completed; At least one wire passing wheel group (140) is arranged between the tape winding unit (120) and the tape storage unit (130), and a plurality of wire passing wheel groups (140) are arranged between the tape storage unit (130) and the wire clamping unit (150), each of the wire passing wheel groups (140) comprising B wire passing wheels parallel to the rotating shaft (112), and the B wire passing wheels are coaxial and arranged in sequence along the axis.

2. A multi-station unwinding device according to claim 1, characterized in that: Each of the rotating shafts (112) comprises B unwinding shafts which are sequentially sleeved from the inside to the outside and whose lengths decrease. The first welding strip unwinding drum (113) is sleeved on the portion of the first unwinding shaft (115) extending from the second unwinding shaft (116), and the remaining welding strip unwinding drums (113) are similarly sleeved. Two adjacent unwinding shafts are connected via a rotating bearing (1121).

3. A multi-station unwinding device according to claim 2, characterized in that: The tape supply unit (110) further comprises A first tape winding shafts (114) vertically arranged on the tape supply bottom plate (111) and corresponding to the A rotation shafts (112); each rotation shaft (112) and the corresponding first tape winding shaft (114) form a tape supply group; and each first tape winding shaft (114) is sleeved with B rollers.

4. A multi-station unwinding device according to claim 2, characterized in that: Each of the tape storage units (130) comprises a base (131), a vertical plate (132), two guide rail units (133) and two position limiting units (134); The vertical plate (132) is vertically arranged on the top surface of the base (131); Each of the guide rail units (133) comprises B guide rail shafts (135) parallel to the rotation axis (112), a gap exists between each guide rail shaft (135) and the vertical plate (132), and both ends are connected to the vertical plate (132) via support rods (136), and a plurality of parallel circumferential rings are arranged on the side wall of the guide rail shaft (135) as the guide rail; The two limit units (134) correspond to the two guide rail units (133) respectively, and are respectively arranged on two sides of the vertical plate (132), and each limit unit (134) includes B limit switches; The guide rail shafts (135) of the same guide rail unit (133) have the same height, and all the guide rail shafts (135) of one guide rail unit (133) are located below all the guide rail shafts (135) of another guide rail unit (133), and the gap between them and the vertical plate (132) is larger.

5. The multi-station unwinding device according to claim 4, characterized in that: The width of each of the wire grooves is 0 to 3 mm greater than the width of the welding strip (01); A pressing block (157) adapted to the wire groove is arranged on the side of each wire pressing block (153) close to the wire groove, the top surface of the pressing block (157) is an inclined surface, and the pressing block (157) passes through the guide groove. The wire pressing block (153) and the pressing block (157) are used to press the welding strip (01) onto the top surface of the wire pressing bottom plate (151).

6. A multi-station unwinding device according to any one of claims 1 to 5, characterized in that: There is one wire passing wheel group (140) between the tape winding unit (120) and the tape storage unit (130), and the wire passing wheel group (140) is arranged on a side of the tape winding bottom plate (121) close to the tape storage unit (130) through a support plate, and the B wire passing wheels of the wire passing wheel group (140) correspond to the B guide rail shafts (135) respectively. The number of wire-passing wheel groups (140) arranged between the tape storage unit (130) and the wire-holding unit (150) is 3 to 4 and they are parallel to each other. One of the wire-passing wheel groups (140) is located on the side of the wire-pressing bottom plate (151) close to the tape storage unit (130) and is connected to the connecting plate (230). The B wire-passing wheels of the wire-passing wheel group (140) correspond to the B wire-pressing bottom plates (151) respectively. The remaining wire-passing wheel groups (140) are located above the vertical plate (132) and the guide rail shaft (135), and the B wire-passing wheels of each wire-passing wheel group (140) correspond to the B guide rail shafts (135) respectively.

7. A multi-station unwinding device according to any one of claims 1 to 5, characterized in that: The number of the unwinding units (100) is two, and the two unwinding units (100) are symmetrically arranged up and down; The tape supply bottom plate (111) and the tape winding bottom plate (121) of each unwinding unit (100) are both arranged vertically.

8. A multi-station unwinding method, using the multi-station unwinding device according to claim 1, characterized in that: The steps include: Step 1: When one of the unwinding units (100) is in normal use, the following operations are performed manually on another adjacent unwinding unit (100): Replacing the welding ribbon unwinding reel (113) on the A rotating shafts (112) of another adjacent unwinding unit (100); The welding tape (01) of the jth welding tape pay-off drum (113) of the ith rotating shaft (112) is passed around the jth passing wheel (123) of the ith second winding shaft (122) to change the direction of the welding tape (01), and then passed around the corresponding guide rail on the tape storage unit (130), and then the welding tape (01) is pulled to the jth wire pressing bottom plate (151), passed through the corresponding wire groove, and then the welding tape (01) is pressed on the top surface of the wire pressing bottom plate (151) by using the corresponding wire pressing block (153) to complete the wire pressing, and finally the jth wire pressing bottom plate (151) is fixed on the work station by using a plurality of positioning pins (156); wherein, i=1, ..., A; j=1, ..., B; Step 2: After the welding strip (01) of the unwinding unit (100) to be used normally is used up, the connecting plate (230) is driven to move in the vertical direction by the switching cylinder (210) to switch to another adjacent unwinding unit (100) processed in step 1.

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