Roll changing device, roll changing method and strip preparation equipment

Abstract

The invention provides a roll changing device, a roll changing method and strip preparation equipment, the roll changing device comprises a first mounting roller, a second mounting roller, a strip pressing mechanism, a strip cutting mechanism, a strip splicing mechanism and a strip traction mechanism, the first mounting roller releases a first strip; the second mounting roller releases a second strip. A working strip sequentially penetrates through the strip pressing mechanism, the strip cutting mechanism and the strip splicing mechanism under the traction of the strip traction mechanism and then reaches a strip preparation station; a standby strip sequentially penetrates through the strip pressing mechanism and the strip cutting-off mechanism, then reaches the strip splicing mechanism and is pressed by the strip pressing mechanism. The strip splicing mechanism is used for splicing the end of the standby strip and the working strip together, and the strip cutting mechanism is used for cutting off the working strip after splicing is completed. When the roll replacing device is used for replacing the material roll, the standby strip and the working strip can be automatically connected after the working strip is used up, so that the material roll replacing efficiency is improved, and the material roll replacing difficulty is reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic module production, and specifically to a roll changing device, a roll changing method and strip preparation equipment. Background Art

[0002] After the battery string is arranged, the busbar needs to be welded. Before the busbar welding is implemented, the busbar needs to be prepared in advance using the busbar preparation equipment. The busbar preparation equipment usually includes a traction mechanism, a clamping device, a cutting device and a receiving table. The busbar preparation process is roughly as follows: the busbar in the material roll is pulled out to a certain length toward the receiving table by the traction mechanism, and then the busbar is pressed by the clamping device, and then the cutting device is controlled to cut the busbar, thereby obtaining a busbar segment with a predetermined length. In some application scenarios, the receiving table also needs to shape the busbar segment into an L or U shape. After the currently prepared busbar segment is taken away, the traction mechanism continues to clamp the busbar from the clamping device and pull it out to a certain length toward the receiving table, and repeat the above operation to complete the preparation of the next busbar segment.

[0003] When the busbar unwinding is completed, that is, when the material roll can no longer unwind the busbar, a new material roll needs to be replaced. The existing material roll replacement method is: stop the machine, manually unload the raw material roll, install the new material roll on the raw material roll, manually pull out the busbar in the new material roll, bypass each guide wheel, pass through the clamping device and the cutting device, and the end of the busbar is clamped by the traction mechanism, and then start the machine. The existing roll replacement method requires stopping the machine before replacing the material roll, and the machine can only be started after all the rolls are replaced. The downtime is long, and it is difficult to pass the busbar through the clamping device and the cutting device due to the small operating space. Summary of the invention

[0004] In view of the above technical problems existing in the traditional roll replacement method, the present application provides a roll replacement device, and its technical solution is as follows:

[0005] A roll changing device comprises a mounting plate and a first mounting roller, a second mounting roller, a strip pressing mechanism, a strip cutting mechanism, a strip connecting mechanism and a strip pulling mechanism mounted on the mounting plate, wherein:

[0006] The first installation roller is used to install the first material roll and drive the first material roll to rotate to release the first tape; the second installation roller is used to install the second material roll and drive the second material roll to rotate to release the second tape;

[0007] The strip pulling mechanism is used to clamp the working strip and pull it to the back-end. The pulled working strip passes through the strip pressing mechanism, the strip cutting mechanism and the strip connecting mechanism in sequence and then reaches the strip preparation station of the back-end. If the working strip is the first strip, the second strip is the spare strip; if the working strip is the second strip, the first strip is the spare strip;

[0008] The end of the spare strip passes through the strip pressing mechanism and the strip cutting mechanism in sequence and then reaches the strip connecting mechanism. The strip pressing mechanism is used to press the spare strip that has passed through;

[0009] The strip pressing mechanism is also used to press the working strip when the unwinding of the working strip is completed. The strip connecting mechanism is used to connect the end of the spare strip with the working strip. The strip cutting mechanism is used to cut the working strip after the connecting is completed. The strip pressing mechanism is used to release the spare strip and the working strip after the cutting is completed.

[0010] The roll changing device provided by the present application is provided with two installation rollers for installing the material rolls, and the material roll on one installation roller is used for feeding (i.e. providing the working strip), and the material roll on the other installation roller is used as a spare material roll (i.e. providing the spare strip). When the material roll providing the working strip cannot continue to discharge material, the working strip is exhausted at this time, and the end of the spare strip provided by the spare material roll can be connected to the working strip online, and then the working strip is cut off, so that the material roll is quickly replaced online.

[0011] Compared with the traditional method of replacing material rolls, the roll changing device provided in the present application is used to replace material rolls. Since the spare material roll can be installed before or during the unloading of the working material roll, there is no need to stop the machine, which shortens the downtime. After the working strip is used up, the spare strip can be automatically and quickly connected to the working strip. After the connection, the spare strip can be used for the next round of production, eliminating the step of manually passing the new strip through the clamping device and the cutting device, thereby improving the material roll replacement efficiency and reducing the difficulty of material roll replacement.

[0012] In some embodiments, the strip clamping mechanism includes a cutting head, a first clamping portion and a second clamping portion, wherein: the cutting head is arranged on a mounting plate; the first clamping portion is arranged on the mounting plate and located on a first side of the cutting head, a first clamping gap for the first strip to pass through is formed between the first clamping portion and a first side wall of the cutting head, and the first clamping portion is used to clamp the first strip on the first side wall of the cutting head; the second clamping portion is arranged on the mounting plate and located on a second side of the cutting head, a second clamping gap for the second strip to pass through is formed between the second clamping portion and the second side wall of the cutting head, and the second clamping portion is used to clamp the second strip on the second side wall of the cutting head.

[0013] By configuring the strip clamping mechanism to include a cutter head, and a first clamping portion and a second clamping portion located on both sides of the cutter head, the strip clamping mechanism can both clamp and release the first strip and clamp and release the second strip, and the clamping and releasing actions on the first strip and the second strip are independent of each other and do not interfere with each other.

[0014] In some embodiments, the first clamping portion includes a first driver and a first clamping block, wherein the first driver is mounted on a mounting plate, the first clamping block is connected to a driving end of the first driver, and the first driver is used to drive the first clamping block to move toward or away from the cutter head to press the first strip against the first side wall of the cutter head or release the first strip; the second clamping portion includes a second driver and a second clamping block, wherein the second driver is mounted on a mounting plate, the second clamping block is connected to a driving end of the second driver, and the second driver is used to drive the second clamping block to move toward or away from the cutter head to press the second strip against the second side wall of the cutter head or release the second strip.

[0015] The invention provides a pressing part structure with a simple structure, which drives a pressing block to move toward or away from a cutter head through a driver so as to press a strip onto a side wall of the cutter head or release the strip.

[0016] In some embodiments, a first fixed blade is formed at the intersection of the first side wall of the cutting head and the upper end surface of the cutting head, and a second fixed blade is formed at the intersection of the second side wall of the cutting head and the upper end surface of the cutting head; the strip cutting mechanism includes a first cutting portion and a second cutting portion, wherein: the first cutting portion is arranged on the mounting plate and located on the first side of the cutting head, a first movable blade is formed on the first cutting portion, a first cutting gap for the first strip to pass through is formed between the first movable blade and the first fixed blade, and the first cutting portion is configured to move toward the first fixed blade to cut the first strip; the second cutting portion is arranged on the mounting plate and located on the second side of the cutting head, a second movable blade is formed on the second cutting portion, a second cutting gap for the second strip to pass through is formed between the second movable blade and the second fixed blade, and the second cutting portion is configured to move toward the second fixed blade to cut the second strip.

[0017] By configuring the strip cutting mechanism to include a first cutting portion and a second cutting portion located on both sides of the cutter head, the strip cutting mechanism can cut both the first strip and the second strip, and the cutting actions of the first strip and the second strip are independent of each other and do not interfere with each other. In addition, the cutter head is reused, which cooperates with the first clamping portion and the second clamping portion to clamp the first strip and the second strip, and cooperates with the first cutting portion and the second cutting portion to cut the first strip and the second strip. In this way, the structure of the roll changing device in the embodiment of the present application is simpler.

[0018] In some embodiments, the first cutting part includes a third driver, a first adapter, a first connecting rod and a first movable cutter, wherein the third driver is mounted on the mounting plate, the first adapter is connected to the driving end of the third driver, the first end of the first connecting rod is movably connected to the first adapter, the second end of the first connecting rod is rotatably connected to the cutter head, the first movable cutter is connected to the second end of the first connecting rod, and a first movable cutter is formed on the first movable cutter; the third driver drives the first movable cutter to rotate toward the first fixed blade via the first connecting rod to cut the first strip; the second cutting part includes a fourth driver, a second adapter, a second connecting rod and a second movable cutter, wherein the fourth driver is mounted on the mounting plate, the second adapter is connected to the driving end of the fourth driver, the first end of the second connecting rod is movably connected to the second adapter, the second end of the second connecting rod is rotatably connected to the cutter head, the second movable cutter is connected to the second end of the second connecting rod, and a second movable cutter is formed on the second movable cutter; the fourth driver drives the second movable cutter to rotate toward the second fixed blade via the second connecting rod to cut the second strip.

[0019] A cutting part with a simple structure is provided, which drives the movable cutter to rotate toward the fixed blade through a driver and a connecting rod to cut the strip. The cutting part of this structure can set the driver on the back of the mounting plate, thereby reducing the area occupied by the front of the mounting plate, and finally making the final structure of the roll change of the present application more compact.

[0020] In some embodiments, the strip connecting mechanism includes a positioning portion and a welding portion relatively arranged on the mounting plate, and a welding gap is arranged between the positioning portion and the welding portion for the first strip and the second strip to pass through; the welding portion and the positioning portion are configured to weld the first strip and the second strip located in the welding gap.

[0021] By configuring the strip splicing mechanism to include a positioning portion and a welding portion, the first strip and the second strip can be spliced ​​together by welding, thereby ensuring that the splicing quality is reliable and stable and is not easy to come off.

[0022] In some embodiments, the positioning portion includes a fifth driver and a positioning block, wherein the fifth driver is mounted on a mounting plate, the positioning block is slidably connected to the mounting plate and connected to the driving end of the fifth driver, and a positioning groove is provided on the end face of the positioning block; the welding portion includes a sixth driver, a welding pin mounting portion, a positive welding pin and a negative welding pin, wherein the sixth driver is mounted on the mounting plate, the welding pin mounting portion is slidably connected to the mounting plate and connected to the driving end of the sixth driver, the positive welding pin and the negative welding pin are mounted on the welding pin mounting portion and point to the positioning groove; the fifth driver and the sixth driver are used to drive the positioning block and the welding pin mounting portion to slide closer to the middle or slide apart to both sides, wherein when the positioning block and the welding pin mounting portion slide closer to the middle, the positive welding pin and the negative welding pin press the first strip and the second strip into the positioning groove, and the positive welding pin and the negative welding pin are also configured to perform energized welding on the compressed first strip and the second strip.

[0023] By setting the positioning part and the welding part, the strip connecting mechanism realizes accurate alignment and rapid welding of the first strip and the second strip to be welded.

[0024] In some embodiments, the welding needle mounting portion includes a slide, a first clamp and a second clamp, wherein: the slide is slidably connected to the mounting plate and is connected to the driving end of the sixth driver; the first clamp is connected to the slide via a first buffer assembly, and the first clamp is used to clamp one of the positive welding needle and the negative welding needle; the second clamp is connected to the slide via a second buffer assembly and is located below the first clamp, and the second clamp is used to clamp the other of the positive welding needle and the negative welding needle.

[0025] By providing the first buffer assembly and the second buffer assembly, the positive electrode welding needle and the negative electrode welding needle can elastically press the first strip and the second strip respectively and complete the welding, thereby ensuring the welding quality. In addition, the positive electrode welding needle and the negative electrode welding needle are clamped in the first clamp block and the second clamp block respectively, thus facilitating the disassembly and assembly of the positive electrode welding needle and the negative electrode welding needle.

[0026] In some embodiments, the solder pin mounting portion further includes a first limit plate and a second limit plate, wherein: the first limit plate is connected to the first clamp block and is higher than the positioning block, and a first limit groove is provided on the end face of the first limit plate facing the positioning block; the second limit plate is connected to the second clamp block and is lower than the positioning block, and a second limit groove is provided on the end face of the second limit plate facing the positioning block.

[0027] When the fifth driver and the sixth driver drive the positioning block and the welding needle mounting part to slide towards the middle, the first limiting groove and the second limiting groove can assist in limiting the first strip and the second strip, ensuring that the first strip and the second strip can eventually be smoothly pressed in the positioning groove by the positive electrode welding needle and the negative electrode welding needle, thereby enhancing the positioning effect of the first strip and the second strip, preventing the connecting sections of the first strip and the second strip from being misaligned, and ultimately improving the connecting effect.

[0028] In some embodiments, the roll changing device also includes a material shortage detection mechanism, wherein: the material shortage detection mechanism is arranged on the mounting plate, the working strip passes through the strip connecting mechanism and then bypasses the material shortage detection mechanism and reaches the subsequent strip preparation station; the material shortage detection mechanism is used to detect whether the unwinding of the working strip is completed.

[0029] By setting up a material shortage detection mechanism, material shortage detection of the working strip is achieved, thereby ensuring that the roll changing operation is started in time when the unwinding of the working strip is completed.

[0030] In some embodiments, the material shortage detection mechanism includes a guide rail, a counterweight, an inlet wheel, a buffer wheel and a sensor, wherein: the guide rail is arranged on the mounting plate in the vertical direction, the inlet wheel is arranged on the mounting plate and is located above the strip connecting mechanism, and the inlet wheel is close to the upper end of the guide rail; the counterweight is slidably connected to the guide rail, the buffer wheel is installed on the counterweight, and the sensor is arranged on the guide rail and close to the lower end of the guide rail; the working strip passes around the inlet wheel and the buffer wheel in sequence under the traction of the traction mechanism.

[0031] When the unwinding of the working strip is not completed, the tension of the pulled working strip is large, and the buffer wheel is pulled by the working strip and is in a high position away from the sensor, so the sensor will not be triggered. When the unwinding of the working strip is completed, the tension of the working strip becomes smaller and loose, and the buffer wheel slides to a low position close to the sensor driven by the counterweight on it, and the sensor is triggered to generate a lack of material signal, thereby realizing the lack of material detection of the working strip.

[0032] The present application also provides a roll changing method, which comprises:

[0033] providing a first roll for releasing the first strip and a second roll for releasing the second strip;

[0034] Using the first strip as a working strip and the second strip as a spare strip, fixing the starting end of the second strip;

[0035] When the unwinding of the first strip meets the roll-changing condition, the first strip is fixed, and the starting end of the second strip is connected to the first strip;

[0036] Cutting the first strip between the connecting position of the first strip and the first material roll, releasing the fixed second strip;

[0037] The second strip is used as a new working strip to continue feeding, completing an automatic roll change.

[0038] Compared with the traditional method of changing material rolls, the roll changing method provided in the present application can be used. The second material roll for releasing the second strip can be installed before or during the release of the first material roll, without stopping the machine, thus shortening the downtime. After the first strip is used up, the second strip can be automatically and quickly connected to the first strip. After the connection, the second strip can be used for the next round of production, thereby improving the efficiency of material roll replacement and reducing the difficulty of material roll replacement.

[0039] The present application also provides another roll changing method, which is implemented by any of the roll changing devices described above, and the roll changing method comprises:

[0040] Installing a first material roll for paying out a first strip on a first installation roller;

[0041] Installing a second roll for paying out a second strip onto a second installation roller;

[0042] Control the strip pulling mechanism to clamp the working strip and pull it to the back-end, so that the pulled working strip passes through the strip pressing mechanism, the strip cutting mechanism and the strip connecting mechanism in sequence and then reaches the strip preparation station of the back-end; if the working strip is the first strip, the second strip is the spare strip; if the working strip is the second strip, the first strip is the spare strip;

[0043] Pull the end of the spare strip so that the end of the spare strip passes through the strip pressing mechanism and the strip cutting mechanism in sequence and then reaches the strip connecting mechanism, and control the strip pressing mechanism to press the spare strip;

[0044] When the unwinding of the working strip is completed, the strip pressing mechanism is controlled to press the working strip;

[0045] The control strip connecting mechanism connects the end of the spare strip with the working strip;

[0046] Control the strip cutting mechanism to cut off the working strip after the splicing is completed;

[0047] The strip clamping mechanism is controlled to release the spare strip and the working strip after the cutting is completed.

[0048] Compared with the traditional method of replacing material rolls, the roll changing method provided in the present application is used to replace material rolls. Since the material roll of the spare strip can be installed before or during the unloading of the working strip, there is no need to stop the machine, which shortens the downtime. After the working strip is used up, the spare strip can be automatically and quickly connected to the working strip. After the connection, the spare strip can be used for the next round of production, thereby improving the material roll replacement efficiency and reducing the difficulty of material roll replacement.

[0049] In some embodiments, the roll changing method further includes: controlling a material shortage detection mechanism to perform material shortage detection on the working strip to determine whether the unwinding of the working strip is completed.

[0050] The lack of material on the working strip is detected, so as to determine when the unwinding of the working strip is completed and start the roll changing operation in time.

[0051] The present application also provides a strip preparation device, which includes the roll changing device, the pressing device, the cutting device and the receiving platform as described in any one of the above items, wherein:

[0052] The roll changing device is used to supply the working strip to the strip preparation station. The pressing device, cutting device and receiving table are all arranged at the strip preparation station. The working strip passes through the pressing device and the cutting device in sequence and then reaches the receiving table; the pressing device is used to press the working strip after the working strip of a predetermined length reaches the receiving table, and the cutting device is used to cut the working strip to obtain the strip segment; the receiving table is used to carry the strip segment, or the receiving table is used to carry the strip segment and shape the strip segment.

[0053] Through the cooperation of the roll changing device, the pressing device, the cutting device and the receiving table, the strip preparation equipment of the present application realizes the automatic preparation of the strips. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural schematic diagram of the roll changing device in an embodiment of the present application at a viewing angle;

[0055] Figure 2 It is a structural schematic diagram of the roll changing device in the embodiment of the present application from another perspective;

[0056] Figure 3 This is a schematic diagram of the assembly structure of the roll changing device and the strip after the material shortage detection mechanism is omitted in the embodiment of the present application;

[0057] Figure 4 It is a front structural schematic diagram of the strip pressing mechanism, the strip cutting mechanism and the strip connecting mechanism in the embodiment of the present application;

[0058] Figure 5 It is a schematic diagram of the back structure of the strip pressing mechanism, the strip cutting mechanism and the strip connecting mechanism in the embodiment of the present application;

[0059] Figure 6 It is a structural schematic diagram of some components of the strip pressing mechanism and the strip cutting mechanism in the embodiment of the present application;

[0060] Figure 7 It is a structural schematic diagram of the strip connecting mechanism in the embodiment of the present application;

[0061] Figure 8 It is a schematic diagram of the structure of the cutter head in the embodiment of the present application;

[0062] Fig. 9 It is a structural schematic diagram of a strip preparation device in an embodiment of the present application;

[0063] Figures 1 to 9 Included:

[0064] Roll changing device 10:

[0065] Mounting plate 1;

[0066] First installation roller 2;

[0067] Second mounting roller 3;

[0068] Strip pressing mechanism 4:

[0069] The blade head 41 includes a first fixed blade 411, a second fixed blade 412, a first pressing and limiting groove 413, and a second pressing and limiting groove 414;

[0070] The first pressing part 42 includes a first driver 421 and a first pressing block 422 ;

[0071] The second pressing part 43: a second driver 431 and a second pressing block 432;

[0072] Strip cutting mechanism 5:

[0073] The first cutting part 51 includes a third driver 511 , a first adapter 512 , a first connecting rod 513 , a first movable cutter 514 , a first pin 515 , and a second pin 516 ;

[0074] The second cutting part 52 includes a fourth driver 521 , a second adapter 522 , a second connecting rod 523 , a second movable cutter 524 , a third pin 525 , and a fourth pin 526 ;

[0075] Strip splicing mechanism 6:

[0076] Positioning part 61: fifth driver 611, positioning block 612, positioning groove 613;

[0077] Welding part 62: sixth driver 621, welding pin mounting part 622, positive electrode welding pin 623, negative electrode welding pin 624, slide seat 625, first clamping block 626, second clamping block 627, first buffer assembly 628, second buffer assembly 629, first limiting plate 6210, second limiting plate 6211, first limiting groove 6212, second limiting groove 6213;

[0078] Strip traction mechanism 7;

[0079] Material shortage detection mechanism 8:

[0080] Guide rail 81;

[0081] Counterweight 82;

[0082] Import wheel 83;

[0083] Buffer wheel 84;

[0084] Sensor 85;

[0085] A clamping device 20;

[0086] Cutting device 30;

[0087] Receiver 40;

[0088] The first strip 100 and the second strip 200 . DETAILED DESCRIPTION

[0089] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0090] like Figures 1 to 3 and Fig. 9 As shown, the roll changing device 10 in the embodiment of the present application includes a mounting plate 1 and a first mounting roller 2, a second mounting roller 3, a strip pressing mechanism 4, a strip cutting mechanism 5, a strip connecting mechanism 6 and a strip pulling mechanism 7 installed on the mounting plate 1, wherein:

[0091] The first installation roller 2 is used to install the first material roll and drive the first material roll to rotate to release the first tape 100 .

[0092] The second installation roller 3 is used to install the second material roll and drive the second material roll to rotate to release the second belt 200 .

[0093] At the same time, one of the first stripe 100 and the second stripe 200 is a working stripe and the other is a standby stripe. Figures 1 to 3 At the moment shown, the first strip 100 is a working strip, and the second strip 200 is a standby strip.

[0094] The strip pulling mechanism 7 is used to clamp the working strip and pull it toward the downstream process. The pulled working strip passes through the strip pressing mechanism 4, the strip cutting mechanism 5 and the strip connecting mechanism 6 in sequence and then reaches the strip preparation station A of the downstream process.

[0095] The end of the spare strip passes through the strip pressing mechanism 4 and the strip cutting mechanism 5 in sequence and then reaches the strip connecting mechanism 6. The strip pressing mechanism 4 is used to press the spare strip passing through. In this way, it can be ensured that the end of the spare strip remains at the strip connecting mechanism 6 to wait for being connected to the working strip.

[0096] The strip pressing mechanism 4 is also used to press the working strip when the unwinding of the working strip is completed. The strip connecting mechanism 6 is used to connect the end of the spare strip with the working strip. The strip cutting mechanism 5 is used to cut the working strip after the connecting is completed. The strip pressing mechanism 4 is used to release the spare strip and the working strip after the cutting is completed.

[0097] In order to enable those skilled in the art to more clearly understand the working process of the roll changing device of the present application, the following will continue to combine Figures 1 to 3 and Fig. 9 , the working process of the roll changing device 10 in the embodiment of the present application is described in detail.

[0098] Before starting the unloading, the first belt 100 and the second belt 200 are initially installed. The initial installation process is as follows:

[0099] A first roll for releasing the first tape 100 is mounted on the first mounting roller 2 , and further, a second roll for releasing the second tape 200 is mounted on the second mounting roller 3 .

[0100] The end of the first strip 100 is manually pulled so that the end of the first strip 100 passes through the strip clamping mechanism 4 , the strip cutting mechanism 5 and the strip connecting mechanism 6 in sequence and is then clamped on the strip pulling mechanism 7 .

[0101] Manually pull the end of the second strip 200 so that the end of the second strip 200 passes through the strip clamping mechanism 4 and the strip cutting mechanism 5 in sequence and reaches the strip connecting mechanism 6, and the second strip 200 is clamped and fixed by the strip clamping mechanism 4, thereby ensuring that the end of the second strip 200 remains in the strip connecting mechanism 6.

[0102] That is, after the initial installation is completed, the first strip 100 is used as a working strip, and the second strip 200 is used as a spare strip. Of course, the installation method of the first strip 100 and the second strip 200 can also be exchanged, so that the second strip 200 is used as a working strip and the first strip 100 is used as a spare strip.

[0103] In addition, the second strip 200 as a spare strip can also be installed during the unwinding process of the first strip 100. As long as it can be ensured that the installation of the second strip 200 is completed before the unwinding of the first strip 100 is completed.

[0104] After the initial installation is completed, the formal strip laying begins.

[0105] The strip pulling mechanism 7 is controlled to pull the first strip 100 toward the strip preparation station A to implement the feeding to the strip preparation station A. As the first strip 100 is continuously pulled out, the amount of the first strip 100 on the first material roll gradually decreases.

[0106] When the first strip 100 meets the roll-changing condition, or the first strip 100 is out of material, the roll-changing operation can be started, specifically:

[0107] The strip traction mechanism 7 is controlled to stop traction, the strip pressing mechanism 4 is controlled to press the first strip 100 , and then the strip connecting mechanism 6 is controlled to connect the end of the second strip 200 located in the strip connecting mechanism 6 to the first strip 100 located in the strip connecting mechanism 6 .

[0108] Next, the strip cutting mechanism 5 is controlled to cut the first strip 100 located in the strip cutting mechanism 5 after the splicing is completed.

[0109] Next, the strip pressing mechanism 4 is controlled to release the second strip 200 and the first strip 100 after the cutting is completed.

[0110] At this point, the automatic roll change is completed.

[0111] After the roll change is completed, the second strip 200 becomes the working strip.

[0112] Next, the strip pulling mechanism 7 is controlled to pull the second strip 200 toward the strip preparation station A. That is, a new round of unloading begins.

[0113] At the beginning of a new round of material unloading or during the material unloading process, the emptied first material roll can be removed at any time, and a new first material roll can be installed on the first installation roller 2, and the end of the first strip 100 released from the new first material roll can be manually pulled, so that the end of the first strip 100 passes through the strip clamping mechanism 4 and the strip cutting mechanism 5 in turn and reaches the strip connecting mechanism 6, and the first strip 100 is clamped and fixed by the strip clamping mechanism 4, thereby ensuring that the end of the new first strip 100 remains in the strip connecting mechanism 6. At this time, the new first strip 100 becomes a spare strip, waiting for the next roll change.

[0114] It can be seen that the roll changing device provided by the present application is provided with two installation rollers for installing the material rolls, and the material roll on one installation roller is used for feeding (i.e. providing the working strip), and the material roll on the other installation roller is used as a spare material roll (i.e. providing a spare strip). When the material roll providing the working strip cannot continue to discharge material, the working strip is exhausted at this time, and the end of the spare strip provided by the spare material roll can be connected to the working strip online, and then the working strip is cut off, so that the material roll is quickly replaced online.

[0115] Compared with the traditional method of replacing material rolls, the roll changing device provided in the present application is used to replace material rolls. Since the spare material roll can be installed before or during the unloading of the working material roll, there is no need to stop the machine, which shortens the downtime. After the working strip is used up, the spare strip can be automatically and quickly connected to the working strip. After the connection, the spare strip can be used for the next round of production, eliminating the steps of manually passing the new strip through the clamping device and the cutting device, thereby improving the efficiency of material roll replacement and reducing the difficulty of material roll replacement.

[0116] The roll changing device provided in the embodiment of the present application is suitable for changing the rolls of bus bars, that is, the first roll and the second roll are bus bar rolls for releasing the first bus bar and the second bus bar respectively. Of course, the roll changing device provided in the embodiment of the present application can also be used for changing the rolls of other strip-shaped materials such as tapes.

[0117] like Figure 4 As shown, optionally, the strip clamping mechanism 4 includes a cutter head 41, a first clamping portion 42 and a second clamping portion 42, wherein: the cutter head 41 is arranged on the mounting plate 1. The first clamping portion 42 is arranged on the mounting plate 1 and is located on the first side of the cutter head 41. A first clamping gap for the first strip 100 to pass through is formed between the first clamping portion 42 and the first side wall of the cutter head 41. The first clamping portion 42 is used to clamp the first strip 100 on the first side wall of the cutter head 41. The second clamping portion 43 is arranged on the mounting plate 1 and is located on the second side of the cutter head 41. A second clamping gap for the second strip 200 to pass through is formed between the second clamping portion 43 and the second side wall of the cutter head 41. The second clamping portion 43 is used to clamp the second strip 200 on the second side wall of the cutter head 41.

[0118] By configuring the strip clamping mechanism 4 to include a cutter head 41, and a first clamping portion 42 and a second clamping portion 42 located on both sides of the cutter head 41, the strip clamping mechanism 4 can not only clamp and release the first strip 100, but also clamp and release the second strip 200, and the clamping and releasing actions on the first strip 100 and the second strip 200 are independent of each other and do not interfere with each other.

[0119] Optionally, the first pressing portion 42 includes a first driver 421 and a first pressing block 422, wherein the first driver 421 is mounted on the mounting plate 1, the first pressing block 422 is connected to the driving end of the first driver 421, and the first driver 421 is used to drive the first pressing block 422 to move toward or away from the cutter head 41 to press the first strip 100 against the first side wall of the cutter head 41 or release the first strip 100. The first driver 421 can be, for example, a translation drive device such as a cylinder, an electric cylinder, a screw motor, etc.

[0120] Similarly, optionally, the second pressing part 43 includes a second driver 431 and a second pressing block 432, wherein the second driver 431 is mounted on the mounting plate 1, the second pressing block 432 is connected to the driving end of the second driver 431, and the second driver 431 is used to drive the second pressing block 432 to move toward or away from the cutter head 41 to press the second strip 200 against the second side wall of the cutter head 41 or release the second strip 200. The second driver 431 can be, for example, a translation drive device such as a cylinder, an electric cylinder, a screw motor, etc.

[0121] Of course, the first pressing portion 42 and the second pressing portion 43 may also adopt pressing mechanisms of other structures, as long as they can implement the pressing and releasing of the first strip 100 and the second strip 200 .

[0122] like Figure 8 As shown, optionally, a first pressing limit groove 413 and a second pressing limit groove 414 are respectively provided on the first side wall and the second side wall of the cutter head 41. The first strip 100 passes through the first pressing limit groove 413, and when the first driver 421 drives the first pressing block 422 to move toward the cutter head 41, the first pressing block 422 is pressed into the first pressing limit groove 413, so that the first pressing block 422 can be prevented from accidentally sliding when pressing the first strip 100, causing the first strip 100 to detach. Similarly, the second strip 200 passes through the second pressing limit groove 414, and when the second driver 431 drives the second pressing block 432 to move toward the cutter head 41, the second pressing block 432 is pressed into the second pressing limit groove 414.

[0123] Continue to refer Figure 8 As shown, the intersection of the first side wall of the cutter head 41 and the upper end surface of the cutter head forms a first fixed blade 411, and the intersection of the second side wall of the cutter head 41 and the upper end surface of the cutter head forms a second fixed blade 412. Figures 4 to 5 As shown, the strip cutting mechanism 5 includes a first cutting portion 51 and a second cutting portion 52, wherein the first cutting portion 51 is arranged on the mounting plate 1 and is located on the first side of the cutter head 41, a first movable blade is formed on the first cutting portion 51, a first cutting gap for the first strip 100 to pass through is formed between the first movable blade and the first fixed blade 411, and the first cutting portion 51 is configured to move toward the first fixed blade 411 to cut off the first strip 100 passing through the first cutting gap.

[0124] The second cutting portion 52 is arranged on the mounting plate 1 and is located on the second side of the cutting head 41. A second movable blade is formed on the second cutting portion 52. A second cutting gap for the second strip 200 to pass through is formed between the second movable blade and the second fixed blade 412. The second cutting portion 52 is configured to move toward the second fixed blade 412 to cut off the second strip 200 passing through the second cutting gap.

[0125] By configuring the strip cutting mechanism 5 to include a first cutting portion 51 and a second cutting portion 52 located on both sides of the cutter head 41, the strip cutting mechanism 5 can not only cut the first strip 100, but also cut the second strip 200, and the cutting actions of the first strip 100 and the second strip 200 are independent of each other and do not interfere with each other. In addition, the cutter head 41 is reused, and the cutter head 41 cooperates with the first pressing portion 42 and the second pressing portion 42 to press the first strip 100 and the second strip 200, and cooperates with the first cutting portion 51 and the second cutting portion 52 to cut the first strip 100 and the second strip 200. This makes the structure of the roll changing device in the embodiment of the present application simpler.

[0126] like Figures 4 to 6 As shown, optionally, the first cutting part 51 includes a third driver 511, a first adapter seat 512, a first connecting rod 513 and a first movable cutter 514, wherein the third driver 511 is mounted on the mounting plate 1, the first adapter seat 512 is connected to the driving end of the third driver 511, the first end of the first connecting rod 513 is movably connected to the first adapter seat 512, the second end of the first connecting rod 513 is rotatably connected to the cutter head 41, the first movable cutter 514 is connected to the second end of the first connecting rod 513, and a first movable blade is formed on the first movable cutter 514. The third driver 511 drives the first movable cutter 514 to rotate toward the first fixed blade 411 via the first connecting rod 513, so that the first movable blade and the first fixed blade 411 are aligned to cut the first strip.

[0127] Optionally, the first adapter seat 512 is U-shaped, and a first connecting hole is provided on the first end of the first connecting rod 513, and the first connecting hole is a waist-shaped hole. The first end of the first connecting rod 513 is inserted between the two arms of the first adapter seat 512, and the first pin 515 passes through the second connecting hole and the two ends of the first pin 515 are respectively installed on the two arms of the first adapter seat 512. The cutter head 41 is provided with a second connecting hole, and the second end of the first connecting rod 513 is provided with a third connecting hole. The second end of the first connecting rod 513 is rotatably connected to the cutter head 41 through a second pin 516 that passes through the second connecting hole and the third connecting hole.

[0128] The third driver 511 can be, for example, a translation drive device such as a cylinder, an electric cylinder, a screw motor, etc. Taking the third driver 511 as a cylinder, when its telescopic rod is extended, the second end of the first connecting rod 513 rotates around the second pin 516 (e.g., rotates clockwise), thereby driving the first movable cutter 514 to rotate synchronously toward the first fixed blade 411 to cut the first strip 100.

[0129] Similarly, optionally, the second cutting part 52 includes a fourth driver 521, a second adapter seat 522, a second connecting rod 523 and a second movable cutter 524, wherein the fourth driver 521 is mounted on the mounting plate 1, the second adapter seat 522 is connected to the driving end of the fourth driver 521, the first end of the second connecting rod 523 is movably connected to the second adapter seat 522, the second end of the second connecting rod 523 is rotatably connected to the cutter head 41, the second movable cutter 524 is connected to the second end of the second connecting rod 523, and a second movable blade is formed on the second movable cutter 524. The fourth driver 521 drives the second movable cutter 524 to rotate toward the second fixed blade 412 via the second connecting rod 523, so that the second movable blade and the second fixed blade 412 are aligned to cut the second strip.

[0130] Optionally, the second adapter seat 522 is U-shaped, and a fifth connection hole is provided on the first end of the second connecting rod 523, and the fifth connection hole is a waist-shaped hole. The first end of the second connecting rod 523 is inserted between the two arms of the second adapter seat 522, and the third pin 525 passes through the fifth connection hole and the two ends of the third pin 525 are respectively installed on the two arms of the second adapter seat 522. A sixth connection hole is provided on the cutter head 41, and a seventh connection hole is provided on the second end of the second connecting rod 523. The second end of the second connecting rod 523 is rotatably connected to the cutter head 41 through a fourth pin 526 that passes through the sixth connection hole and the seventh connection hole.

[0131] The fourth driver 521 can be, for example, a translation drive device such as a cylinder, an electric cylinder, a screw motor, etc. Taking the fourth driver 521 as a cylinder as an example, when its telescopic rod is extended, the second end of the second connecting rod 523 rotates around the fourth pin 526 (such as counterclockwise), thereby driving the second movable cutter 524 to rotate synchronously toward the second fixed blade 412 to cut the second strip 200.

[0132] like Figures 4 to 5 and Figure 7 As shown, optionally, the strip connecting mechanism 6 includes a positioning portion 61 and a welding portion 62 which are relatively arranged on the mounting plate 1, and a welding gap is arranged between the positioning portion 61 and the welding portion 62 for the first strip 100 and the second strip 200 to pass through. The welding portion 62 and the positioning portion 61 are configured to weld the first strip 100 and the second strip 200 located in the welding gap.

[0133] Still taking the first strip 100 as the working strip and the second strip 200 as the spare strip as an example, the first strip 100 passes through the welding gap under the traction of the strip traction mechanism 7, and the end of the second strip 200 is pre-pulled into the welding gap. When splicing, the positioning portion 61 and the welding portion 62 weld the ends of the first strip 100 and the second strip 200 located therebetween together, so that the end of the second strip 200 is spliced ​​to the first strip 100.

[0134] Optionally, the positioning portion 61 includes a fifth driver 611 and a positioning block 612, wherein the fifth driver 611 is installed on the mounting plate 1, the positioning block 612 is slidably connected to the mounting plate 1 and connected to the driving end of the fifth driver 611, and a positioning groove 613 is provided on the end face of the positioning block 612.

[0135] The welding part 62 includes a sixth driver 621, a welding pin mounting part 622, a positive welding pin 623 and a negative welding pin 624, wherein the sixth driver 621 is mounted on the mounting plate 1, the welding pin mounting part 622 is slidably connected to the mounting plate 1 and is connected to the driving end of the sixth driver 621, and the positive welding pin 623 and the negative welding pin 624 are mounted on the welding pin mounting part 622 and point to the positioning groove 613.

[0136] The fifth driver 611 and the sixth driver 621 are used to drive the positioning block 612 and the welding needle installation part 622 to slide toward the middle or slide toward both sides to separate, wherein when the positioning block 612 and the welding needle installation part 622 slide toward the middle, the positive electrode welding needle 623 and the negative electrode welding needle 624 press the first strip 100 and the second strip 200 into the positioning groove 613, and then the positive electrode welding needle 623 and the negative electrode welding needle 624 perform the energized welding of the pressed first strip 100 and the second strip 200. The fifth driver 611 and the sixth driver 621 can be, for example, translation driving devices such as cylinders, electric cylinders, and screw motors.

[0137] By setting the positioning portion 61 and the welding portion 62 , the strip connecting mechanism 6 realizes accurate alignment and rapid welding of the first strip 100 and the second strip 200 to be welded.

[0138] Optional, such as Figure 7 As shown, the welding needle mounting portion 622 includes a slide 625, a first clamp 626 and a second clamp 627, wherein the slide 625 is slidably connected to the mounting plate 1 and is connected to the driving end of the sixth driver 621. The first clamp 626 is connected to the slide 625 via a first buffer assembly 628, and the first clamp 626 is used to clamp one of the positive electrode welding needle 623 and the negative electrode welding needle 624. The second clamp 627 is connected to the slide 625 via a second buffer assembly 629 and is located below the first clamp 626, and the second clamp 627 is used to clamp the other of the positive electrode welding needle 623 and the negative electrode welding needle 624.

[0139] Optionally, the first buffer component 628 and the second buffer component 629 have the same structure. Taking the first buffer component 628 as an example, the first buffer component 628 includes a spring and a guide rod, one end of the guide rod is connected to the slide 625, the first clamp 626 is slidably passed through the guide rod, the spring is mounted on the guide rod, and the two ends of the spring respectively abut the slide 625 and the first clamp 626.

[0140] By providing the first buffer component 628 and the second buffer component 629 , the positive electrode welding needle 623 and the negative electrode welding needle 624 can elastically press the first strip 100 and the second strip 200 respectively and complete the welding, thereby ensuring the welding quality.

[0141] In addition, the positive electrode welding needle 623 and the negative electrode welding needle 624 are clamped in the first clamping block 626 and the second clamping block 627 respectively, so that the disassembly and assembly of the positive electrode welding needle 623 and the negative electrode welding needle 624 can be facilitated.

[0142] Continue to refer Figure 7 As shown, optionally, the solder pin mounting portion 622 further includes a first limiting plate 6210 and a second limiting plate 6211, wherein: the first limiting plate 6210 is connected to the first clamping block 626 and is higher than the positioning block 612, and a first limiting groove 6212 is provided on the end surface of the first limiting plate 6210 facing the positioning block 612. The second limiting plate 6211 is connected to the second clamping block 627 and is lower than the positioning block 612, and a second limiting groove 6213 is provided on the end surface of the second limiting plate 6211 facing the positioning block 612.

[0143] In this way, when the fifth driver 611 and the sixth driver 621 drive the positioning block 612 and the welding needle mounting portion 622 to slide toward the middle, the first limiting groove 6212 and the second limiting groove 6213 can assist in limiting the first strip 100 and the second strip 200, ensuring that the first strip 100 and the second strip 200 can eventually be smoothly pressed in the positioning groove 613 by the positive welding needle 623 and the negative welding needle 624, thereby enhancing the positioning effect of the first strip 100 and the second strip 200, preventing the connection sections of the first strip 100 and the second strip 200 from being misaligned, and ultimately improving the connection effect.

[0144] like Figures 1 to 3 As shown, optionally, the roll changing device in the embodiment of the present application further includes a material shortage detection mechanism 8, wherein: the material shortage detection mechanism 8 is arranged on the mounting plate 1, and the working strip passes through the strip connecting mechanism 6, bypasses the material shortage detection mechanism 8, and then reaches the subsequent strip preparation station A. The material shortage detection mechanism 8 is used to detect whether the unwinding of the working strip is completed.

[0145] By providing the material shortage detection mechanism 8, material shortage detection of the working strip is achieved, thereby ensuring that the roll changing operation is started in time when the unwinding of the working strip is completed.

[0146] Optionally, the material shortage detection mechanism 8 includes a guide rail 81, a counterweight 82, an introduction wheel 83, a buffer wheel 84 and a sensor 85, wherein: the guide rail 81 is arranged on the mounting plate 1 in the vertical direction, the introduction wheel 83 is arranged on the mounting plate 1 and is located above the strip connecting mechanism 6, and the introduction wheel 83 is close to the upper end of the guide rail 81. The counterweight 82 is slidably connected to the guide rail 81, the buffer wheel 84 is installed on the counterweight 82, and the sensor 85 is arranged on the guide rail 83 and close to the lower end of the guide rail 81. Under the traction of the traction mechanism 7, the working strip successively bypasses the introduction wheel 83 and the buffer wheel 84 and then enters the strip preparation station A.

[0147] When the unwinding of the working strip is not completed, the tension of the pulled working strip is relatively large, and the buffer wheel 84 is pulled by the working strip and is at a high position away from the sensor 85, so the sensor 85 will not be triggered. When the unwinding of the working strip is completed, the tension of the working strip becomes smaller and loose, and the buffer wheel 84 slides to a low position close to the sensor 85 driven by the counterweight 82 thereon, and the sensor 85 is triggered to generate a material shortage signal.

[0148] The present application also provides a roll changing method, which comprises the following steps:

[0149] A first roll for releasing the first strip and a second roll for releasing the second strip are provided.

[0150] Use the first strip as a working strip and the second strip as a spare strip, and fix the starting end of the second strip.

[0151] When the unwinding of the first strip meets the roll-changing condition, the first strip is fixed, and the starting end of the second strip is connected to the first strip.

[0152] The first strip is cut between the connecting position of the first strip and the first material roll to release the fixed second strip.

[0153] The second strip is used as a new working strip to continue feeding, completing an automatic roll change.

[0154] After the automatic roll change is completed, a new first roll for releasing the first strip is provided, and the starting end of the first strip is fixed, that is, the new first strip is used as a spare strip. When the discharge of the second strip meets the roll change condition, the next automatic roll change is implemented.

[0155] The roll changing method provided in the embodiments of the present application can be implemented by the roll changing devices provided in the above embodiments of the present application, and of course it can also be implemented by roll changing devices with other suitable structures.

[0156] Compared with the traditional method of changing material rolls, the roll changing method provided in the embodiment of the present application is used. The second material roll for releasing the second strip can be installed before or during the release of the first material roll, without stopping the machine, thus shortening the downtime. After the first strip is used up, the second strip can be automatically and quickly connected to the first strip. After the connection, the second strip can be used for the next round of production, thereby improving the efficiency of material roll replacement and reducing the difficulty of material roll replacement.

[0157] Another embodiment of the present application provides another roll changing method, which is implemented by the roll changing devices provided in the above embodiments. The roll changing method includes the following steps:

[0158] Installing a first material roll for releasing a first tape 100 onto a first installation roller 2;

[0159] Installing a second material roll for releasing a second tape 200 onto the second installation roller 3;

[0160] The strip pulling mechanism 7 is controlled to clamp the working strip and pull it toward the back process, so that the pulled working strip passes through the strip pressing mechanism 4, the strip cutting mechanism 5 and the strip connecting mechanism 6 in sequence and then reaches the strip preparation station A of the back process. If the working strip is the first strip 100, the second strip 200 is the spare strip; if the working strip is the second strip 200, the first strip 100 is the spare strip.

[0161] Pull the end of the spare strip so that it passes through the strip clamping mechanism 4 and the strip cutting mechanism 5 in sequence and then reaches the strip connecting mechanism 6, and control the strip clamping mechanism 4 to clamp the spare strip.

[0162] When the unwinding of the working strip is completed, the strip pressing mechanism 4 is controlled to press the working strip.

[0163] The control strip connecting mechanism 6 connects the end of the standby strip with the working strip.

[0164] The control strip cutting mechanism 5 cuts off the working strip after the splicing is completed.

[0165] The control strip clamping mechanism 4 releases the spare strip and the working strip after the cutting is completed.

[0166] The spare strip can be pulled to the rear track as the working strip for the next round.

[0167] Similarly, the roll changing method provided in the embodiment of the present application is used to replace the material roll. Since the spare material roll can be installed before or during the unloading of the working material roll, there is no need to stop the machine, which shortens the downtime. After the working strip is exhausted, the spare strip can be automatically and quickly connected to the working strip. After the connection, the spare strip can be used for the next round of production, which improves the efficiency of material roll replacement and reduces the difficulty of material roll replacement.

[0168] Optionally, the roll changing method in the embodiment of the present application further includes: controlling a material shortage detection mechanism to perform a material shortage detection on the working strip to determine whether the unwinding of the working strip is completed.

[0169] In this way, the lack of material on the working strip can be detected, thereby ensuring that the roll changing operation can be started in time when the unwinding of the working strip is completed.

[0170] The present application also provides a strip preparation device, such as Fig. 9 As shown, the strip preparation device includes the roll changing device 10, the pressing device 20, the cutting device 30 and the receiving platform 40 described in any one of the above items, wherein:

[0171] The roll changing device 10 is used to supply the working strip to the strip preparation station A. The pressing device 20, the cutting device 30 and the receiving platform 40 are all arranged at the strip preparation station A. The working strip passes through the pressing device 20 and the cutting device 30 in sequence and then arrives at the receiving platform 40. The pressing device 20 is used to press the working strip after the working strip of a predetermined length arrives at the receiving platform 40, and the cutting device 30 is used to cut the working strip to obtain a strip segment. The receiving platform 40 is used to carry the strip segment, or the receiving platform 40 is used to carry the strip segment and shape the strip segment, such as shaping the strip segment into an L or U shape.

[0172] It can be seen that through the cooperation of the roll changing device 10, the pressing device 20, the cutting device 30 and the receiving platform 40, the strip preparation equipment provided in the embodiment of the present application realizes the automatic preparation of the strip.

[0173] The strip preparation device provided in the embodiment of the present application is suitable for preparing busbar segments. Of course, it can also be used to prepare other strip segments.

[0174] The present application is described in sufficient detail above with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, rather than by the above description in the embodiments.

Claims

1. A roll changing device, characterized in that: The roll changing device comprises a mounting plate and a first mounting roller, a second mounting roller, a strip pressing mechanism, a strip cutting mechanism, a strip connecting mechanism and a strip pulling mechanism mounted on the mounting plate, wherein: The first installation roller is used to install a first material roll and drive the first material roll to rotate to release a first strip; the second installation roller is used to install a second material roll and drive the second material roll to rotate to release a second strip; The strip pulling mechanism is used to clamp the working strip and pull it to the back-end. The pulled working strip passes through the strip pressing mechanism, the strip cutting mechanism and the strip connecting mechanism in sequence and then reaches the strip preparation station of the back-end. If the working strip is the first strip, the second strip is the spare strip; if the working strip is the second strip, the first strip is the spare strip; The end of the spare strip passes through the strip pressing mechanism and the strip cutting mechanism in sequence and then reaches the strip connecting mechanism, and the strip pressing mechanism is used to press the spare strip passing through; The strip pressing mechanism is also used to press the working strip when the unwinding of the working strip is completed, the strip connecting mechanism is used to connect the end of the spare strip to the working strip, the strip cutting mechanism is used to cut the working strip after the connecting is completed, and the strip pressing mechanism is used to release the spare strip and the working strip after the cutting is completed.

2. The roll changing device according to claim 1, characterized in that: The strip pressing mechanism comprises a cutter head, a first pressing part and a second pressing part, wherein: The cutter head is arranged on the mounting plate; The first pressing portion is arranged on the mounting plate and located on the first side of the cutter head, a first pressing gap for the first strip to pass through is formed between the first pressing portion and the first side wall of the cutter head, and the first pressing portion is used to clamp the first strip on the first side wall of the cutter head; The second clamping portion is arranged on the mounting plate and located on the second side of the cutter head. A second clamping gap for the second strip to pass through is formed between the second clamping portion and the second side wall of the cutter head. The second clamping portion is used to clamp the second strip on the second side wall of the cutter head.

3. The roll changing device according to claim 2, characterized in that: The first pressing portion includes a first driver and a first pressing block, wherein the first driver is mounted on the mounting plate, the first pressing block is connected to a driving end of the first driver, and the first driver is used to drive the first pressing block to move toward or away from the cutter head to press the first strip against the first side wall of the cutter head or release the first strip; The second clamping portion includes a second driver and a second pressure block, wherein the second driver is mounted on the mounting plate, the second pressure block is connected to the driving end of the second driver, and the second driver is used to drive the second pressure block to move toward or away from the cutter head to press the second strip against the second side wall of the cutter head or release the second strip.

4. The roll changing device according to claim 2, characterized in that: A first fixed blade is formed at the intersection of the first side wall of the cutter head and the upper end surface of the cutter head, and a second fixed blade is formed at the intersection of the second side wall of the cutter head and the upper end surface of the cutter head; The strip cutting mechanism comprises a first cutting part and a second cutting part, wherein: The first cutting portion is disposed on the mounting plate and located on a first side of the cutter head, a first movable blade is formed on the first cutting portion, a first cutting gap for the first strip to pass through is formed between the first movable blade and the first fixed blade, and the first cutting portion is configured to move toward the first fixed blade to cut the first strip; The second cutting portion is arranged on the mounting plate and is located on the second side of the cutter head. A second movable blade is formed on the second cutting portion. A second cutting gap for the second strip to pass through is formed between the second movable blade and the second fixed blade. The second cutting portion is configured to move toward the second fixed blade to cut the second strip.

5. The roll changing device according to claim 4, characterized in that: The first cutting part comprises a third driver, a first adapter, a first connecting rod and a first movable cutter, wherein the third driver is mounted on the mounting plate, the first adapter is connected to the driving end of the third driver, the first end of the first connecting rod is movably connected to the first adapter, the second end of the first connecting rod is rotatably connected to the cutter head, the first movable cutter is connected to the second end of the first connecting rod, and the first movable cutter is formed with the first movable blade; The third driver drives the first movable cutter to rotate toward the first fixed blade via the first connecting rod to cut the first strip; The second cutting part comprises a fourth driver, a second adapter, a second connecting rod and a second movable cutter, wherein the fourth driver is mounted on the mounting plate, the second adapter is connected to the driving end of the fourth driver, the first end of the second connecting rod is movably connected to the second adapter, the second end of the second connecting rod is rotatably connected to the cutter head, the second movable cutter is connected to the second end of the second connecting rod, and the second movable cutter is formed with the second movable blade; The fourth driver drives the second movable cutter to rotate toward the second fixed blade via the second connecting rod to cut the second strip.

6. The roll changing device according to claim 1, characterized in that: The strip connecting mechanism comprises a positioning portion and a welding portion which are arranged on the mounting plate in opposite directions, and a welding gap is arranged between the positioning portion and the welding portion for the first strip and the second strip to pass through; The welding portion and the positioning portion are configured to weld the first strip and the second strip located in the welding gap.

7. The roll changing device according to claim 6, characterized in that: The positioning part includes a fifth driver and a positioning block, wherein the fifth driver is mounted on the mounting plate, the positioning block is slidably connected to the mounting plate and connected to the driving end of the fifth driver, and a positioning groove is provided on the end surface of the positioning block; The welding part comprises a sixth driver, a welding pin mounting part, a positive welding pin and a negative welding pin, wherein the sixth driver is mounted on the mounting plate, the welding pin mounting part is slidably connected to the mounting plate and connected to the driving end of the sixth driver, and the positive welding pin and the negative welding pin are mounted on the welding pin mounting part and point to the positioning groove; The fifth driver and the sixth driver are used to drive the positioning block and the welding needle mounting portion to slide together toward the middle or slide apart toward both sides, wherein when the positioning block and the welding needle mounting portion slide together toward the middle, the positive welding needle and the negative welding needle press the first strip and the second strip into the positioning groove, and the positive welding needle and the negative welding needle are also configured to perform energized welding on the compressed first strip and the second strip.

8. The roll changing device according to claim 7, characterized in that: The solder pin mounting portion includes a slide seat, a first clamping block and a second clamping block, wherein: The slide is slidably connected to the mounting plate and connected to the driving end of the sixth driver; The first clamping block is connected to the slide seat via a first buffer assembly, and the first clamping block is used to clamp one of the positive electrode welding needle and the negative electrode welding needle; The second clamping block is connected to the slide seat via a second buffer assembly and is located below the first clamping block, and the second clamping block is used to clamp the other of the positive electrode welding needle and the negative electrode welding needle.

9. The roll changing device according to claim 8, characterized in that: The solder pin mounting portion further includes a first limiting plate and a second limiting plate, wherein: The first limiting plate is connected to the first clamping block and is higher than the positioning block, and a first limiting groove is provided on the end surface of the first limiting plate facing the positioning block; The second limiting plate is connected to the second clamping block and is lower than the positioning block. A second limiting groove is provided on the end surface of the second limiting plate facing the positioning block.

10. The roll changing device according to claim 1, characterized in that: The roll changing device also includes a material shortage detection mechanism, wherein: The material shortage detection mechanism is arranged on the mounting plate, and the working strip passes through the strip connecting mechanism, bypasses the material shortage detection mechanism, and then reaches the strip preparation station of the subsequent process; The material shortage detection mechanism is used to detect whether the unwinding of the working strip is completed.

11. The roll changing device according to claim 10, characterized in that: The material shortage detection mechanism includes a guide rail, a counterweight, an introduction wheel, a buffer wheel and a sensor, wherein: The guide rail is arranged on the mounting plate in a vertical direction, the introduction wheel is arranged on the mounting plate and is located above the strip connecting mechanism, and the introduction wheel is close to the upper end of the guide rail; The counterweight block is slidably connected to the guide rail, the buffer wheel is mounted on the counterweight block, and the sensor is arranged on the guide rail and close to the lower end of the guide rail; The working belt is pulled around the introduction wheel and the buffer wheel in sequence by the pulling mechanism.

12. A roll changing method, characterized in that: The roll changing method comprises: providing a first roll for releasing the first strip and a second roll for releasing the second strip; Using the first strip as a working strip and the second strip as a spare strip, and fixing the starting end of the second strip; When the unwinding of the first strip meets the roll-changing condition, the first strip is fixed, and the starting end of the second strip is connected to the first strip; Cutting the first strip between the connecting position of the first strip and the first material roll, and releasing the fixed second strip; The second strip is used as a new working strip to continue feeding, completing an automatic roll change.

13. A roll changing method, characterized in that: The roll changing method is implemented by the roll changing device according to any one of claims 1 to 11, and the roll changing method comprises: Installing a first material roll for paying out a first strip on a first installation roller; Installing a second roll for paying out a second strip onto a second installation roller; Control the strip pulling mechanism to clamp the working strip and pull it toward the back-end, so that the pulled working strip passes through the strip pressing mechanism, the strip cutting mechanism and the strip connecting mechanism in sequence and then reaches the strip preparation station of the back-end; if the working strip is the first strip, the second strip is the spare strip; if the working strip is the second strip, the first strip is the spare strip; Pulling the end of the spare strip so that the end of the spare strip passes through the strip pressing mechanism and the strip cutting mechanism in sequence and then reaches the strip connecting mechanism, and controlling the strip pressing mechanism to press the spare strip; When the unwinding of the working strip is completed, controlling the strip pressing mechanism to press the working strip; Controlling the strip connecting mechanism to connect the end of the standby strip with the working strip; Controlling the strip cutting mechanism to cut off the working strip after the splicing is completed; The strip pressing mechanism is controlled to release the spare strip and the working strip after the cutting is completed.

14. The roll changing method according to claim 13, characterized in that: The roll changing device according to claim 10 is implemented, and the roll changing method further comprises: The material shortage detection mechanism is controlled to perform material shortage detection on the working strip to determine whether the unwinding of the working strip is completed.

15. A strip preparation device, characterized in that: The strip preparation equipment comprises a roll changing device, a pressing device, a cutting device and a receiving platform as claimed in any one of claims 1 to 11, wherein: The roll changing device is used to supply the working strip to the strip preparation station, the pressing device, the cutting device and the receiving platform are all arranged at the strip preparation station, and the working strip passes through the pressing device and the cutting device in sequence and then reaches the receiving platform; The pressing device is used to press the working strip after the working strip of a predetermined length reaches the receiving platform, and the cutting device is used to cut the working strip to obtain strip segments; The receiving platform is used to carry the strip segment, or the receiving platform is used to carry the strip segment and shape the strip segment.

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