Station and method for rotary lateral cutting of

Abstract

The invention relates to a station and a method for rotationally transversely cutting material. The invention provides a station for rotationally transversely cutting material, the station comprising a housing, a feed drum with knives, a roller, characterized in that an upper feed drum (6) and a lower feed drum (7) arranged in the housing have an undercut (19) and a channel (12) for at least one pair of blades, namely an upper knife (8) and a lower knife (9), wherein the upper sheet-feeding drum (6) and the lower sheet-feeding drum (7) are driven by a "driver" section (10), and wherein, in a certain phase, an upper blade (8) and a lower blade (9) arranged on the upper sheet-feeding drum (6) and the lower sheet-feeding drum (7) simulate an approximate vertical cutting movement.

Description

[0001] The subject of this invention is a station for rotating and laterally cutting material and a method for doing so. This subject matter belongs to the field of apparatus for laterally cutting webs of active material in the battery manufacturing industry, where electrode sheet production is actually carried out in a battery manufacturing machine. Such a station is used prior to the process of stacking battery cells. The apparatus can also be used in the printing industry and any industry that requires the handling of webs and web sheets.

[0002] Currently, the most popular method for producing electrode sheets is by cutting with a flat guillotine. A similar cutting system, namely the System for Manufacturing Cell Stack of Secondary Battery, has been disclosed in document KR101933550B1. This system involves a machine that assists in the manufacture of batteries. This machine has different parts that work together to cut and mount battery components. There is a positive electrode-feeding portion in which the positive electrode film is wound and mounted. There is also an anode-cutting portion that cuts the cathode film to specific dimensions. The machine has a tilting stage that can rotate in both directions and an electrode stacking unit that drives the stage. A separator supply unit continuously delivers separator material. The machine also has a cathode conveying unit that transports the cut cathode plates to the tilting stage. The anode-cutting unit has a cutting platform and various adsorption rods for holding and cutting the cathode film to achieve efficient and precise battery manufacturing.

[0003] A system is known from document WO2022255651 that automates the electrode notching and cell stacking processes in secondary batteries. This system connects a notching section for notching lead tabs at the electrode edges with a cell laying section for laying negative plates, positive plates, and separators in a proper sequence to form a cell stack. Therefore, by simplifying the notching and laying steps, the efficiency and accuracy of the secondary battery manufacturing process are improved.

[0004] An apparatus for cutting electrode sheets to form multi-element electrode bodies is known from document WO2012074214. This apparatus includes a cutter that cuts the electrode sheet when it is attached in place, and multiple grippers that receive and transport one electrode sheet at a time. This apparatus improves the efficiency and accuracy of the cutting process, enabling the mass production of multi-element electrode bodies for various applications, such as batteries or electronic devices.

[0005] Document KR102638743 discloses an apparatus for cutting electrode sheets. The assembly consists of stacked electrode sheets with partitions between them. The apparatus has a pair of cutting elements that simultaneously cut electrode tabs. The apparatus also has a drive unit for moving the cutting elements up and down. The cutting elements are angled relative to the surface of the assembly and have guide portions for attaching and cutting the tabs. The apparatus is part of a module including a loading area, a cutting area, a first welding area for one tab, a second welding area for a second tab, and an unloading area. The module also has a turntable that rotates and attaches the assembly for cutting.

[0006] Document KR20210103719 discloses an invention relating to an electrode cutting apparatus for a storage battery, the apparatus for continuously grooving and cutting a transported electrode sheet, the apparatus comprising: at least one transport unit that transports the delivered electrode sheet while applying pressure to the delivered electrode sheet to grooving and cutting the electrode sheet; a grooving unit comprising a first roller and a second roller arranged above and below the electrode sheet, the first roller and the second roller being arranged beside the transport unit, the first roller and the second roller continuously grooving the transported electrode sheet while generating leads on both widths of the electrode sheet; and a slitting unit arranged on one side of the transport unit and producing a grooved electrode sheet in the form of a single electrode with the generated leads.

[0007] Document KR102507080 discloses an apparatus for high-speed cutting. An apparatus for high-speed cutting of a secondary battery according to an embodiment of the present invention is used to cut electrode sheets forming electrodes of a secondary battery using an upper blade and a lower blade during a conveying process. The apparatus for high-speed cutting includes: a rollblock coupled to the upper blade and eccentrically rotated to trace a circular rotational trajectory along the conveying direction of the electrode sheet on the upper portion of the electrode sheet; a slider coupled to the lower blade and sliding on the lower portion of the electrode sheet in a direction opposite to the conveying direction of the electrode sheet; a drive unit that causes the rollblock to eccentrically rotate along the conveying direction of the electrode sheet; and a substantially vertical guide that links the sliding operation of the slider to the eccentric rotation operation of the rollblock and slidably connects the rollblock and the slider in a substantially vertical direction, such that the eccentric rotation of the rollblock prevents changes in posture.

[0008] The solutions proposed to date for cutting machines require complex connections of many system components. Their construction is highly complex, expensive, and time-consuming, and the quality and effectiveness are unsatisfactory. Considering the need for simplified construction and the requirement for very high precision due to the highly sensitive process, other types of cutting, such as grooving or shearing, cannot produce suitable cut quality. The active layer of the coating is torn off and ultimately cut unevenly. Large impurities are generated near the edges of the cut. Furthermore, systems that have so far worked with start-stop systems are limited by the large acceleration, reversal, or braking of the web due to system inertia and machine vibration. Therefore, the aim is to deliver a larger number of electrode sheets to the stacking process, leading to faster battery manufacturing. Due to the nature of current devices, it can be observed that cutting accuracy varies with cutting speed in other types of cutting. The higher the speed, the greater the decrease in cutting accuracy. When high cutting accuracy is required, the cutting blades should be positioned as close to each other as possible, resulting in rapid blade wear. The purpose of this device is also to facilitate blade changes and achieve appropriate cutting parameters in the shortest possible time, while reducing operator workload. Proper proximity and co-operation of the blades produce a self-sharpening effect. Start-stop systems can cause web vibration in fragile materials, which can damage active materials when manufacturing speeds are increased. In this solution, the web moves at a stable speed, protecting the fragile coating from excessive impact / vibration. This invention addresses the identified technical problems by providing an improved and versatile structure free from the defects found in solutions known to date. To address these problems found in prior art solutions, new structures for stations used in transverse cutting have been proposed, and the object of this invention is to enhance the versatility of use, the efficiency of production and construction, and increase economic efficiency by providing an improved structure of the device, while simultaneously avoiding any and all surface losses. A further object of this invention is to obtain a versatile and efficient device with high precision, achieved through shearing cutting occurring in the guillotine and in this solution.

[0009] The essence of the present invention is a station for rotating transverse cutting of material, the station comprising a housing, a sheeting cylinder with blades, and rollers, characterized in that the upper sheeting cylinder and the lower sheeting cylinder arranged in the housing have an undercut and channels for at least a pair of blades (for the upper blade and the lower blade), wherein the upper sheeting cylinder and the lower sheeting cylinder are driven by a "driver" section, wherein at a certain stage, the upper blade and the lower blade arranged on the upper sheeting cylinder and the lower sheeting cylinder simulate an approximate vertical cutting motion.

[0010] Preferably, during cutting, the working elements of the blade (upper and lower blades) are substantially perpendicular to each other, and the upper and lower blades mesh with each other and perform a collision-free exit.

[0011] Preferably, the upper and lower feed rollers have separate servo drives—a third servo drive and a fourth servo drive.

[0012] Preferably, the "driver" section includes a servo driver for the NIP, a second servo driver for the receiving device, a third servo driver for the lower roller, a fourth servo driver for the upper roller, and a fifth driver that serves as the second driver for the receiving device.

[0013] Preferably, the station has a receiving device at the station exit, wherein the receiving device includes a belt conveyor and / or another belt conveyor and / or a reception site.

[0014] Preferably, the station includes a lateral adjustment device for the upper feed roller and a lateral adjustment device for the blades (upper and lower blades) that is adjusted by means of the lateral adjustment device for the roller and / or a separate adjustment device for each blade (upper and lower blades), the separate adjustment device for each blade (upper and lower blades) being adjusted by means of a mounting system having a mounting hole that is substantially horizontal, a mounting hole that is substantially vertical and an adjusting bolt in the adjusting hole.

[0015] Preferably, on the other side, the upper and lower rollers have roller / shaft clutches and servo drives with transmissions.

[0016] Preferably, the lower blade includes an undercut section. It is also feasible to have the upper blade also having an undercut section. Various blade configurations can be assembled, such as configurations where the upper and lower blades are interchangeable, or configurations where either the upper or lower blade is used for cutting.

[0017] Preferably, the upper and lower feed rollers can slide in phase with each other via independent drives (a third servo drive for the lower roller and a fourth servo drive for the upper roller), which determine the distance between the upper and lower cutters to optimize cutting quality.

[0018] Preferably, the upper and lower feed rollers and the material feeding device can slide in phase—the upper and lower feed rollers and the material feeding device have different linear velocities relative to each other via independent drives, for adjusting the cutting speed and / or length.

[0019] Preferably, the station has an encoder arranged on the feed rollers, wherein the encoder measures the actual shaft position of the feed rollers (upper feed roller, lower feed roller) and simultaneously adapts the actual shaft position of the feed rollers (upper feed roller, lower feed roller) to the motor shaft position of the servo drives (third servo drive of the lower roller and fourth servo drive of the upper roller) in a controlled manner.

[0020] Preferably, the upper and lower feeding rollers are connected (or engaged) by wheels (gears on the upper shaft, reverse wheels, and gears on the lower shaft) and driven by a third drive of the rollers.

[0021] Preferably, the station is equipped with an encoder.

[0022] Preferably, the station is equipped with a roller clamp.

[0023] Preferably, the third drive of the lower roller is connected to the lower roller via a clutch.

[0024] Preferably, the station has a feeding device that includes a lower roller and an upper roller with a clamping system.

[0025] The present invention also relates to a method for cutting sheet material in the above-mentioned station, characterized in that the method includes the following steps:

[0026] a) Accelerate the rollers to achieve the correct sheet length and specific phase slip between the blades.

[0027] b) Stabilize the speed of the roller to a speed close to that of the material.

[0028] c) Tension the web material to ensure precise cutting.

[0029] d) The blade engages while cutting the sheet, resulting in the web being converted into a sheet, with the blades engaging at approximately a right angle.

[0030] e) Disengage the blade and feed the sheet to another process, in which the sheet is pushed out of the station and prepared for cutting subsequent sheets.

[0031] f) Return to the initial step.

[0032] The advantages of this invention are the elimination of the drawbacks of flat guillotine cutting, which operates in a cycle of material start-stop, thus limiting manufacturing speed; furthermore, variable cutting conditions arise in known machines. The imposed requirement of maintaining the highest cutting quality has been resolved through the rotational nature of the operation of the device according to the invention. Through a combination of technical features, a simulation of guillotine cutting is practically achieved while maintaining better speed parameters than a flat guillotine, providing cutting accuracy unaffected by manufacturing speed. Simultaneously, a simple and fully controlled method is provided that allows for changing the length of repeated movements. Due to its structure, it offers versatility as a device applicable to a variety of jobs, and economic efficiency is increased with optimal material utilization. Known prior art solutions propose guillotine-type planar cutting of electrodes, where the cutter is vertically engaged with the blade despite rotational movement. Furthermore, the primary objective is not to perform "planar" cutting, but only rotational cutting. The aim is to make the shape of the blade in a short cross-section simulate approximately vertical movement; however, this would be impossible if the blade were fixedly attached to the shaft. The aim is to achieve a rotational simulation of a flat guillotine.

[0033] Embodiments of the present invention are visualized in the accompanying drawings, in which:

[0034] - Figure 1 The diagram shows a cross-section through the central plane of a narrow-version station with a receiving conveyor.

[0035] - Figure 2 A side view of a narrow station with a receiving conveyor is shown.

[0036] - Figure 3 A rear view of a narrow station with a receiving conveyor is shown.

[0037] - Figure 4 A front view of a narrow station with a receiving conveyor is shown.

[0038] - Figure 5 The cross-section of a pair of rollers connected by gears is shown.

[0039] - Figure 6a and Figure 6b An exemplary blade for the lower shaft is shown in side and longitudinal views.

[0040] - Figure 7 A schematic diagram of the device and its operation is shown.

[0041] - Figure 8 It shows a close-up of the roller, a demonstration of the meshing, and the installation of the blade onto the roller.

[0042] - Figure 9 Examples of differences in the shape of blades used in machines are shown.

[0043] - Figure 10 The meshing process of the blades is shown.

[0044] - Figure 11 The image shows a lateral cross-section of a wide-version station without a receiving device.

[0045] - Figure 12a and Figure 12b The rear and side views of a wide-type station without a receiving device are shown.

[0046] - Figure 13 A cross-sectional view of a wide-type station without a receiving device is shown.

[0047] - Figure 14a and Figure 14b A cross-sectional view and a rear view of a wide-type station with a receiving unit consisting of two conveyors are shown.

[0048] - Figure 15a and Figure 15b Perspective views of wide and narrow stations are shown.

[0049] - Figure 16 The view of the roller with the blades attached is shown in a side view.

[0050] like Figures 1-5 and Figures 7-11As can be seen, an embodiment of the solution according to the invention is a station for rotating and transversely cutting material. This station is not limited to including elements such as: a driven roller 1 (i.e., the lower roller of the NIP), a rubber roller 2 (i.e., the upper roller of the NIP) clamped by means of an actuator, a clamping system 3 for the rubber roller, and a sheet receiving device 4 (this is, for example, a driven rubber belt that receives the sheet and thus pushes it out of the station). Furthermore, in alternative embodiments, the station may have an optional roller clamping system 5. The station also includes an upper feed roller 6, a lower feed roller 7, an upper cutter 8, a lower cutter 9, and servo drives—a third servo drive 17 for the lower roller and a fourth servo drive 18 for the upper roller. The machine for cutting can be wide, and in alternative embodiments, narrow. The width of the station can be adjusted as needed. The parameters and overall dimensions of the station will change accordingly based on the length and diameter of the used feed rollers attached to the main body, and based on the needs and requirements of the receiver for the manufacturing speed applied to the machine. Viewed from left to right, the components in the machine according to the embodiment are as follows: On the left, at the entrance of the station, there is a complete NIP device, which includes the following components: a driven roller 1 (i.e., the lower roller of the NIP), a rubber roller 2 (i.e., the upper roller of the NIP), for example, pneumatically clamped, and a clamping system 3 for the rubber roller is also provided here. This clamping system limits the speed of the machine while generating tension on the machine and feeding the material to the blanking-die station. It will be apparent to those skilled in the art that the NIP type device is a sub-assembly that includes a driven roller (most commonly an embossed or knurled metal roller to increase friction, although other smooth rollers may also exist) and a clamping roller (most commonly a roller made of metal and covered with rubber to increase friction, although other rollers may also exist) located above the drive roller. This NIP type device is used to generate tension / slide the material or laminate layers; it is generally referred to by common names, such as: driven roller or material feeding device, i.e., nip roller-type driven roll.

[0051] The sheet receiving device 4 is located on the right side of the station (i.e., viewed from the service side of the station), at the station's exit. Receiving device 4 is the end point for processed material that has undergone the treatment by the cutting station. After cutting, the product can exit to receiving point 4. Receiving point 4, in the form of receiving device 4, may include two belt conveyors that clamp the sheet before cutting, applying strain-tension to the web to stabilize the cut fragment and hold the cut material. Alternatively, the two belt conveyors may have two drives or be coupled together via a single drive. There may be a lower belt conveyor that will only receive the falling sheet—this is shown in a narrow embodiment. Figures 1-4In one alternative embodiment of the narrow-type device, the receiving device 4 is an integral part of the station, secured between the station's mainboards. The driver of the receiving device is attached to the station's mainboard. In another alternative embodiment of the device, Figure 14a , Figure 14b These can be two separate devices added to the base station. For example, the sheet receiving device 4, such as a worktable, has its own separate drive. They can be configured to clamp the sheets and generate tension on them before cutting. Another configuration option is that after cutting, the sheets inertially fall onto a lower conveyor or to a collection location.

[0052] The station has an upper feed roller 6, a lower feed roller 7, an upper blade 8, and a lower blade 9. The upper feed roller 6 and lower feed roller 7 each have two separate drives: a third servo drive 17 for the lower roller and a fourth servo drive 18 for the upper roller. These two drives operate asynchronously. They are synchronized with the speed of the paper / material only in short angular segments before and after cutting the sheet. The upper blade 8 and lower blade 9 are attached to the upper feed roller 6 and lower feed roller 7, respectively. The attachment of the blades to the rollers is achieved through some kind of detachable connector (e.g., screws) – specifically, by mounting screw 33. The rollers can accelerate or decelerate between the blades to match the length of the sheet. The rollers can be synchronized differently for each pair of blades. In an alternative embodiment, such as for a narrower type, there may be feed rollers: an upper feed roller 6 and a lower feed roller 7, which are connected together by wheels (e.g.,...). Figure 5 As shown in the diagram—that is, in the presence of a knife, the upper feed roller 6 and the lower feed roller 7 are connected together by wheels—that is, by these wheels: gear 26 on the upper shaft, reverse gear 27, and gear 28 on the lower shaft, as shown in the diagram. Figure 5 It can be seen in the middle.

[0053] Furthermore, to ensure the structure meets stiffness and strength requirements, the entire station and the width of the material being processed must have greater dimensions and width, a consequence of engineering principles in this field. To provide small deflection values ​​while maintaining strength requirements, the diameter of the roller can be increased. For example, for a narrow station preferably with an exemplary width of about 300mm-400mm, a shaft with a diameter of about 60mm-120mm can preferably be used. For a wider station preferably with a width of about 800mm-1000mm, a shaft with a diameter of 180mm-350mm can preferably be used. These parameters can be adjusted accordingly without departing from the essence of this solution.

[0054] exist Figure 2The station components visible in the side view are not limited to: the "drive" section 10, the station's main board 11, rods and / or beams—rods and / or beams are interchangeable components for those skilled in the art, and similar types of components can be used as connecting elements 13 for the station's main board. The station's main board 11, which forms the body of the machine, must provide high rigidity and strength for the sub-assemblies embedded therein. The station's main board 11 has a U-shaped groove 29 to allow mounting of an upper feed roller 6, which can be located in a bearing cube placed in the groove 29 of the station's main board 11.

[0055] Figure 3 The components visible in the rear view of the station are not limited to the first servo drive 15 of the NIP, the second servo drive 16 of the receiving unit (receiving device 4), the third servo drive 17 of the lower roller, and the fourth servo drive 18 of the upper roller.

[0056] Figure 4 The components visible in the front view of the station are not limited to the lateral adjustment device 14 of the upper feed roller 6. In an alternative example, with only a pair of blades, the adjustment device for the entire upper feed roller 6 can be used on the station. This adjustment device is responsible for setting the blades relative to each other so that the grooves between the blades are equal. In an alternative form where a larger number of blades are present, threaded holes 39 for adjusting the substantially vertical plane are located in the roller, preferably with fine threads, to allow for the use of clamping screws to push the blades out. In this way, the blades are set between each other in a substantially vertical plane.

[0057] For example, in the illustration of paired rollers and their sections Figure 5 As can be seen, the visible elements of the device according to an alternative embodiment of the station are not limited to including: a first pin 21 from the shaft on the driver side, a second pin 22 from the shaft on the operator side, an upper shaft (i.e., upper feed roller 6), a lower shaft (i.e., lower feed roller 7), and a sloped portion 25 of the upper shaft. Considering the fact that this is a hollow shaft (referred to as a roller or feed roller), the feed roller can also be referred to as a shaft or roller as the same element. In an alternative embodiment, the station may also be equipped with a first gear 26 (optional) on the upper shaft (upper feed roller), a reverse gear 27 (optional) for reducing angular clearance, and a second gear 28 (optional) on the lower shaft.

[0058] exist Figure 6a and Figure 6bThe diagram illustrates an exemplary blade for the lower shaft, which can be an alternative embodiment of the blade. The blade / insertion is attached to the roller via a detachable connector that must provide secure retention, for example, via a screw connector, i.e., via mounting screws 33, and this is achieved by separately fabricated horizontal mounting holes 37 and vertical mounting holes 38. Particularly in an alternative embodiment, the wide station has an exemplary width preferably about 1000 mm and can have one or more pairs of blades / insertions. Preferably, even three to six pairs of blades can be used in a wide station with an exemplary roller diameter of about 200 mm to 250 mm. Depending on the desired speed, the required sheet length, and the machine width, we see parameters such as the shaft diameter and the number of blades varying. For example, the diameter of the feed roller / shaft can adopt the parameters of a narrow machine with an exemplary width of about 300 mm to 400 mm, where the exemplary value of the roller / shaft can preferably reach a diameter of 60 mm to 120 mm, which can, for example, allow one to three pairs of blades / insertions on the circumference. In other alternative embodiments, fewer blades may be present, where other machine parameters can then be selected, for example, the linear speed of the machine can be reduced according to the correlations indicated below. A wider machine defines the diameter of the shaft. This diameter of the shaft can also be controlled according to the desired length of the sheet. The shorter the sheet, the more preferably the smaller the shaft, or the greater the number of blades on the circumference.

[0059] Speed ​​dependence—which can be illustrated by way of example—means that for a narrower machine, for example having a width of about 300-400, having a shaft with a diameter of, for example, about 60-100, and having one blade—speeds of 0 to 50 m / min can preferably be achieved on a sheet of 100 mm in length, and speeds of 0 to 80 m / min can preferably be achieved on a sheet of 150 mm in length.

[0060] Alternatively, when there are two blades, preferably, a speed of 30 m / min can be achieved for a sheet length of 100 mm, and a speed of 100 m / min can be achieved for a length of 150 mm. Based on these correlations, conclusions can be drawn regarding the appropriate selection of parameters, which will be possible for those skilled in the art and will not limit them. Similar correlations emerge in both wide and narrow machines, where we can demonstrate parameterized speed correlations and proportions regarding the dimensions of the device and the resulting diameter and speed. The selection of the machine width and shaft length is a matter of individual adaptation based on the recipient's needs and can be chosen according to the requirements imposed on the machine. This also determines the proportional design of other machine dimensions and parameters, the diameter of the machine's rollers, the number and length of the blades, and the power of the servo motors, which is a subject of study for those skilled in the art.

[0061] exist Figure 7 The diagram shows a schematic of an apparatus consisting of the following components, as indicated: a driven roller (lower roller of the NIP) 1, a rubber roller (upper roller of the NIP) 2 clamped by an actuator, a sheet feed roller 6 (upper shaft), a sheet feed roller 7 (lower shaft), and a sheet receiving device 4. The operating directions of the selected components are also indicated.

[0062] The view and cross-section of the station are shown. Figure 11 , Figure 12a , Figure 12b , Figure 13 The visible components include, but are not limited to: the driven roller (lower roller 1 of the NIP); the rubber roller clamped by the actuator (upper roller 2 of the NIP); and the upper feed roller 6, lower feed roller 7, upper cutter 8, lower cutter 9, the first servo driver 15 of the NIP, the second servo driver 16 of the receiving device, and the roller drivers: the third servo driver 17 of the lower roller, the fourth servo driver 18 of the upper roller, and the driver of the material feed roller—that is, the NIP—the driven roller—the lower roller 1 of the NIP. The station has a main board 11, a roller clamp 5, a sensor 32 (encoder 32) for the angular position of the roller, mounting screws 33, and a roller / shaft clutch, and also includes, but is not limited to: a bearing assembly 36 with a hub, and a fifth driver 23 with a gearbox—which is the second driver of the receiving device 4. The clutch 34 is selected to have appropriate stiffness such that the stiffness of the clutch should increase with the width, the magnitude of the station and / or the load parameters and / or the parameters regarding the operating speed.

[0063] Figure 8 A close-up of the rollers and a demonstration of their engagement are shown. Just upstream of the downward cut, the undercut section 19 of the rollers can be seen. Figure 8 The image also shows the blade for the feeding roller and the mounting screws 33 for the channel 12.

[0064] exist Figure 9The diagram illustrates alternative blade shapes for exemplary blades used in narrow and wide machines. As described above, the blade parameters are selected based on the diameter of the shaft (drum). As an example, one of the blade parameters is the angle. Preferably, angles α and β correspond to each other and serve the same purpose, with their values ​​totaling between 0 and 30 degrees. Preferably, when the drum diameter reaches approximately 80 cm, angle α can reach approximately 9.5 degrees, and preferably, when the drum diameter reaches approximately 228 cm, angle β can reach approximately 6 degrees. By analogy, angles γ and ω preferably correspond to each other and serve the same purpose, with their values ​​totaling between 0 and 30 degrees. Preferably, when the drum diameter reaches approximately 80 cm, angle γ can reach approximately 8 degrees, and preferably, when the drum diameter reaches approximately 228 cm, angle ω can reach approximately 5 degrees. Dimensions A and B are corresponding and can reach values ​​in the range of 0 mm to 2 mm, preferably 0.85 mm, regardless of the drum's diameter. Therefore, for example, the first dimension A of the blade can preferably be about 0.85 mm, and the second dimension B of the blade can preferably be about 0.85 mm. Figure 10 The blade engagement process has been shown in the diagram. The technical features and achieved technical effects of the station are a rotational simulation of guillotine planar cutting. The blades (upper blade 8, lower blade 9) arranged on the feed rollers 6 and 7 must, to a certain extent, simulate an approximate vertical cutting motion. The blade parameters are selected such that during cutting, the blades are substantially perpendicular to each other on the workpiece; however, some deviations may occur regarding this point. The blades engage with each other and perform a collision-free disengagement. As discussed, collision-free operation is provided due to the fact that the average diameter of engagement differs from the average distance between the feed rollers 6 and 7. For this reason, the shape of the blade depends on the diameter we are working with. During cutting, the lower blade 9 (the base of a guillotine) is set substantially perpendicular to the material. This means that, over a short distance, the lower blade is somewhat parallel to the web. The upper blade 8 has a sharp tip and is set perpendicular to the material during cutting. The angle range of the upper blade 8 is preferably between 0 degrees and 30 degrees, and the angle range of the lower blade 9 is preferably between 0 degrees and 30 degrees.

[0065] A method for cutting material in a station for rotating transverse cutting of material includes the following steps:

[0066] 1. The process of accelerating the rollers to achieve the correct sheet length and a specific phase slip between the blades. This process occurs when the blades are not engaged. Therefore, we achieve the setting of the sheet length.

[0067] 2. Stabilize the roller speed to a speed close to that of the material. This allows us to avoid starting and stopping the machine. When cutting with a flat guillotine, we achieve a relatively stationary material and a essentially vertical movement of the blade. Synchronization can occur before and after cutting. In the machine, we adjust the length of the synchronization section from the control panel.

[0068] 3. Tensioning the web allows for precise cutting. This achieves tension on the web between the NIP (material feed device) and the receiving device 4, as well as stable web behavior. In effect, the inertial behavior of the sheet creates impermissibility—leading to better accuracy across the entire device. In models with two receiving tables (receiving device 4), tension can be generated between the NIP and the receiving table (i.e., receiving device 4). This improves cutting quality and helps control the process, preventing uncontrolled behavior of individual sheets.

[0069] 4. The blade engages while cutting the sheet, resulting in the conversion of the web into a sheet. The blades engage at right angles.

[0070] 5. Disengage the blade and feed the sheet to another process, in which the sheet is pushed out of the station and prepared for cutting subsequent sheets.

[0071] 6. Return to step 1.

[0072] According to the station embodiment, the automatic change of the slots between the blades is provided by the fine adjustment of the servo mechanism, which extends the blade operation and minimizes errors when manually setting the blades. The blades are mounted to the rollers 6 and 7 (upper feed roller 6 and lower feed roller 7) through holes in the blades (upper blade 8, lower blade 9) and threaded holes in the rollers 6 and 7 (set along the entire length of the slot (undercut 19) in the rollers). The holes are located in two planes that are virtually perpendicular to each other. Furthermore, the rollers include small, fine threaded holes that allow for adjustment of the blades' essentially vertical plane. Moreover, the setting of the blades 8 and 9 is automatic due to the drive of the two rollers 6 and 7, thus minimizing the workload and time required for operator tool changes. This also helps to eliminate operator errors and inaccuracies in blade / blade placement. The slots generated by the individual drives (i.e., the third servo drive 17 and the fourth servo drive 18) from the station's "drive" section 10 allow for adjustment of the slots between these blades / each of these blades (i.e., upper blade 8 and lower blade 9). This adaptation is achieved by evaluating the cutting quality. For example, thicker materials and / or materials that do not require high quality allow the blades to be further spaced, thus extending the blade's lifespan. Additionally, individual adjustment allows each of blades 8 and 9 to be adjusted separately based on cutting quality after the initial assessment.

[0073] According to the structure of the station in the embodiment, the drive of the two rollers allows them to be controlled separately—by inputting different acceleration and angular velocity values—and effectively avoids double contact of the blades. Therefore, proper adjustment of the sheet length and better removal of the sheet after cutting are achieved.

[0074] According to the embodiment, the base of the station consists of two parallel main plates 11 with forming grooves 29, and connecting beams and / or rods 13. The main plates 11 with forming grooves 29 are preferably U-shaped. The main body consists of two bladed rollers – an upper feeding roller 6 and a lower feeding roller 7. Depending on the diameter of the shaft and the length of the sheet, the rollers have one or more pairs of slatted blades. The cylindrical rollers – the upper feeding roller 6 and the lower feeding roller 7 – have channels 12 for attaching the blades. The rollers have undercut sections 19 to prevent the material from being crushed – this is... Figure 8 As can be seen in the text.

[0075] In alternative embodiments, such as in a narrower form, the rollers—upper feed roller 6 and lower feed roller 7—may be coupled together by gears and have a drive for one of the shafts. However, this results in a reduction in one of the functions, where the upper feed roller 6 and lower feed roller 7 are coupled together by wheels (e.g., ...). Figure 5 As shown) - that is, in the presence of a knife, the upper feed roller 6 and the lower feed roller 7 are connected together by wheels (i.e., gear 26 on the upper shaft, reverse gear 27, and gear 28 on the lower shaft).

[0076] In another alternative embodiment, each roller has its own individual servo drive, thus each roller is individually controlled. Furthermore, each feed roller can slide in phase with each other. With the participation of independent drives located on the rollers (upper feed roller 6 and lower feed roller 7) and the material feeding device 20, the rollers can be accelerated and cutting of sheets of different lengths can be performed. Alternatively, through the operation of the upper feed roller 6 and lower feed roller 7 and through the material feeding device 20, the cutting station allows the individual elements to slide in phase with each other by means of independent drives, which has a favorable effect on the adjustment of the material cutting speed and / or length. With this arrangement of the individual elements, in the case of thinner materials, the cutting blades can be close together, while in the case of thicker materials, the cutting blades can slide apart, which allows for an extended blade / blade life. Alternatively, instead of using all pairs of blades for cutting, some blades can be spaced apart.

[0077] According to one embodiment of the station, the lower feed roller 7 is mounted in a fixed hub. The upper feed roller 6 can be mounted in a bearing cube placed in a slot 29 of the main plate 11 of the station. In the case of a single drive, according to an alternative embodiment, the upper feed roller 6 needs to roll on the inclined portion 25 of the lower shaft (i.e., on the lower feed roller 7), and a clamping device (i.e., a clamp 5) is needed to clamp the upper feed roller 6 to the lower feed roller 7. When the blades collide, the clamp 5 allows the upper feed roller 6 to jump away. The blades are threaded onto the rollers. These blades can have an angular adjustment relative to the axis of the rollers.

[0078] According to an embodiment, the blades are made into a suitable shape selected based on geometry (i.e., the diameter of the blade) to simulate rotary guillotine cutting. In the station, the material being cut has a thickness of 30 micrometers to 600 micrometers. The hardness of the individual blades (blades) is the same, and / or one of the upper blade / blade and / or lower blade / blade can be harder, for example, between 45 HRC and 65 HRC. Preferably, a hardness of 60 HRC is preferred; however, in alternative embodiments, the blades are varied as required, depending on the workpiece and the material being cut. One of the blades has a sharp tip; for example, this could be the upper blade 8 or the lower blade 9.

[0079] The lower blade 9 forms the base of the guillotine. The upper blade 8 forms the sharp cutting section, equivalent to the basically vertical movable blade in the guillotine. The lower blade 9 includes a bottom cutting section 31 that serves a cleaning function, collecting debris from the cut material so that it does not interfere with further processes or contaminate subsequent sheets. Furthermore, the leading edge of the next sheet may fall into this groove and not engage with the blade during material feeding, potentially leading to edge deterioration and material buildup due to blockage. The width of the machine defines the shape of the blades. According to these proportions, the wider the material, the wider the rollers (upper feed roller 6, lower feed roller 7), and variations in the roller diameter determine other blade angles.

[0080] In a station used for rotary transverse cutting of materials, the degree of blade engagement can be varied depending on the workpiece, the thickness and type of the web material. In one variation, the cutting point is located on a diameter different from the average diameter between the shafts: as an example, for the upper shaft (upper feed roller 6) and the lower shaft (lower feed roller 7), if the average diameter between the shafts reaches a selected fit value (e.g., 228 mm), the cutting point is selected above that diameter, which can preferably be 0.5 m or 0.3 mm. Due to acceleration, a higher linear velocity in one of the shafts (rollers) is used to avoid a second contact of the blades during the roller's "retraction". Due to the specific nature of the device operation, the converging blades must only have one close-to-each-other situation during cutting—such as... Figure 10This can be seen from the diagram. When the diameters are equal and the angular velocities are the same, the blades make contact with each other twice: symmetrically during the first contact (the cutting point) and after passing through the essentially vertical plane. The second contact is undesirable due to the possibility of material damage.

[0081] Upstream of the rollers (upper feed roller 6, lower feed roller 7), a material feeding device 20 (NIP) is positioned, comprising a drive roller 1 and a rubber roller 2 that clamps the drive roller 1. Material enters between the rollers: driven roller 1 (lower roller of the NIP), rubber roller 2 (upper roller of the NIP), and thus, the material is precisely fed. Downstream of the rollers (upper feed roller 6, lower feed roller 7), a receiving device 4 and a feeding / pushing device 20 are positioned for receiving the finished sheet and feeding / pushing it onto the conveyor belt. The receiving device 4 and the feeding / pushing device 20 can exist in several options. In one embodiment, it can exist as two conveyors (upper conveyor and lower conveyor) whose task is to clamp the sheet and generate tension in the web.

[0082] In an alternative embodiment, the device may operate based on feedback from a vision system or other system that checks the quality of the cut edge and adjusts the blade angle settings for better cutting results or notifies about blade wear. In another alternative embodiment, the device may operate in conjunction with a roller cleaning system.

[0083] During operation, the load on the servo mechanisms driving the rollers (i.e., the third servo drive 17 of the lower roller and the fourth servo drive 18 of the upper roller) is continuously monitored. The station has an interface and a computer—a controller with software for calculation, control, and calibration. Adjustments are therefore made, including checking the load on the servo mechanisms. If the tools (i.e., the tools adhered to the upper and lower shafts) are too close together, the load on the servo motors will temporarily rise above the rated value. Based on the load, calibration and presets of the tools (i.e., the upper tool 8 and the lower tool 9) are also performed.

[0084] Each servo motor (i.e., the first servo driver 15 of the NIP, the second servo driver 16 of the receiving device, the third servo driver 17 of the lower roller, and the fourth servo driver 18 of the upper roller) is configured with an encoder having a resolution preferably of 0.0309 arcseconds. This choice of resolution allows for the measurement of angular position, for example, up to 0.00017 mm on an arc surrounded by a knife / blade. Alternatively, in an alternative embodiment, the encoder can be mounted to the roller from the side opposite the driver, thus the encoder then measures the direct angular position (for longer machines), as seen in examples for wide-type machines. Figure 13 The parameters are marked accordingly. For lower or higher dimensions, these parameters will be adjusted accordingly, as will be apparent to those skilled in the art.

[0085] Each roller: the upper feed roller 6 and the lower feed roller 7 can perform a minimum movement of about 1 micrometer on the circumference.

[0086] On the other side of the rollers (upper feed roller 6, lower feed roller 7), an encoder 32 can be installed to monitor the actual angular position of the rollers. This eliminates the torsional and mechanical hysteresis from the drive and the clearance from the clutch 34 due to the machine's acceleration and deceleration. The encoder 32 can also be used to verify operating parameters relative to those read from sensors on the servo drive. Every piece of information, data, and parameter is analyzed by a program included in the machine controller and displayed and set on the user interface panel.

[0087] Material change detection sensors 30 are installed upstream of the station. In this case, these are "pieces," i.e., notched lugs on one or both sides of the material. Therefore, cutting can be performed at a precise location relative to the material.

[0088] This solution is designed for material cutting in the field of devices used for laterally cutting webs of active material in the battery manufacturing industry, where the actual production of electrode sheets is carried out within the battery manufacturing machine. This station is used prior to the process of stacking battery cells. The device can also be used in the printing industry and any industry that requires the handling of webs and web sheets.

[0089] This invention is not limited to the embodiments shown above. Various modifications and extensions can be made to these embodiments within the scope of the appended claims without departing from the spirit of the invention.

[0090] List of reference numbers:

[0091] 1. Driven roller, lower roller of NIP

[0092] 2. The upper roller of NIP is clamped by the actuator.

[0093] 3. Clamping system for rubber rollers

[0094] 4. Receiving section – Sheet receiving device

[0095] 5. Optional roller clamping system

[0096] 6. Feeding roller – upper shaft

[0097] 7. Feeding roller – lower shaft

[0098] 8. Cut the knife

[0099] 9. Make the cut

[0100] 10 “Drive” section

[0101] 11 stations' motherboard

[0102] 12. Channels of the rollers

[0103] 13 Connecting elements – rods and / or beams connecting the main board of the connecting station

[0104] 14 Lateral adjustment device for the upper roller

[0105] The first servo drive with 15 NIP

[0106] 16 Second servo driver of the receiving device

[0107] The third servo drive for the 17 lower rollers

[0108] The fourth servo drive for the 18 upper rollers

[0109] 19. Bottom section of the roller

[0110] 20. Material Feeding Device – NIP (Near Injector Plate)

[0111] 21. Journal on the driver side

[0112] 22. Journals on the operator's side

[0113] 23 Fifth driver – Second driver of the receiving device

[0114] 24. Attachments to the receiving device

[0115] 25. The inclined section of the upper shaft

[0116] 26. Gear on the upper shaft (optional)

[0117] 27. Reverse wheel with reduced angular clearance (optional)

[0118] 28. Lower shaft gear (optional)

[0119] 29. Motherboard slots

[0120] 30 Material Change Detection Sensor

[0121] 31. The bottom cut of the knife.

[0122] 32 Sensors for roller angular position – encoders

[0123] 33 Mounting Bolts

[0124] 34. Clutch for rollers / shafts

[0125] 35 Sensor attachments

[0126] 36. Bearing assembly with hub

[0127] 37 Horizontal mounting holes

[0128] 38 Vertical mounting holes

[0129] 39. Threaded hole for vertical adjustment.

Claims

1. A station for rotating and transversely cutting material, the station comprising a housing, a feeding roller with blades, and rollers, characterized in that, The upper feed roller (6) and lower feed roller (7) arranged in the housing have undercut sections (19) and channels (12) for at least one pair of blades, for the upper blade (8) and the lower blade (9), wherein the upper feed roller (6) and the lower feed roller (7) are driven by a "driver" section (10), wherein at a certain stage, the upper blade (8) and the lower blade (9) arranged on the upper feed roller (6) and the lower feed roller (7) simulate an approximate vertical cutting motion.

2. The station according to claim 1, characterized in that, During cutting, the working elements of the blade, namely the upper blade (8) and the lower blade (9), are substantially perpendicular to each other, and the upper blade (8) and the lower blade (9) mesh with each other and perform a collision-free exit.

3. The station according to any one of claims 1-2, characterized in that, The upper feeding roller (6) and the lower feeding roller (7) have separate servo drives, namely the third servo drive (17) and the fourth servo drive (18).

4. The station according to any one of claims 1-3, characterized in that, The “driver” section (10) includes a servo driver (15) of the NIP, a second servo driver (16) of the receiving device (4), a third servo driver (17) of the lower roller, a fourth servo driver (18) of the upper roller, and a fifth driver (23) that serves as the second driver of the receiving device.

5. The station according to any one of claims 1-4, characterized in that, The station has a receiving device (4) at the exit of the station, wherein the receiving device (4) includes a belt conveyor (1) and / or a belt conveyor (2) and / or a receiving section.

6. The station according to any one of claims 1-5, characterized in that, The station includes a lateral adjustment device (14) for the upper feed roller (6), and includes the blades, i.e., the upper blade (8) and the lower blade (9), which are adjusted by means of the lateral adjustment device (14) of the roller and / or by means of individual adjustment devices for each blade, i.e., the upper blade (8) and the lower blade (9), which are adjusted by means of an adjustment bolt in a mounting system having a substantially horizontal mounting hole (37), a substantially vertical mounting hole (38) and an adjustment hole (39).

7. The station according to any one of claims 1-6, characterized in that, On the other side, the upper roller (6) and the lower roller (7) have roller / shaft clutches (34), and the servo drives (17, 18) have gearboxes.

8. The station according to any one of claims 1-7, characterized in that, The lower cutter (9) or the upper cutter (8) includes a bottom cutting portion (31).

9. The station according to any one of claims 1-8, characterized in that, The upper feed roller (6) and the lower feed roller (7) can slide in phase with each other via independent drivers, namely the third servo driver (17) of the lower roller and the fourth servo driver (18) of the upper roller. The independent drivers determine the distance between the upper cutter (8) and the lower cutter (9) to optimize the cutting quality.

10. The station according to any one of claims 1-9, characterized in that, The upper feeding roller (6) and the lower feeding roller (7) and the material feeding device (20) can slide in phase. The upper feeding roller (6) and the lower feeding roller (7) and the material feeding device (20) have different linear velocities relative to each other through independent drives, which are used to adjust the cutting speed and / or length.

11. The station according to any one of claims 1-10, characterized in that, The station has an encoder (32) arranged on the feeding rollers (6, 7), wherein the encoder (32) measures the actual shaft position of the feeding rollers, namely the upper feeding roller (6) and the lower feeding roller (7), and simultaneously adapts the actual shaft position of the feeding rollers, namely the upper feeding roller (6) and the lower feeding roller (7), to the motor shaft position of the servo drives, namely the third servo drive (17) of the lower roller and the fourth servo drive (18) of the upper roller.

12. The station according to any one of claims 1, 2, 5, 6, and 8, characterized in that, The upper feeding roller (6) and the lower feeding roller (7) are connected together by wheels and driven by the third driver (17) of the rollers. The wheels are the upper shaft gear (26), the reverse wheel (27), and the lower shaft gear (28).

13. The station according to claim 12, characterized in that, The station is equipped with an encoder (32).

14. The station according to any one of claims 1-13, characterized in that, The station is equipped with a clamp (5) for the roller.

15. The station according to any one of claims 1-14, characterized in that, The third drive (17) of the lower roller is connected to the lower roller (7) via a clutch (34).

16. The station according to any one of claims 1-15, characterized in that, The station has a feeding device (20) which includes a lower roller (1) and an upper roller (2) with a clamping system (3).

17. A method for cutting sheet material in a station according to any one of claims 1-16, characterized in that, The method includes the following steps: a) The step of accelerating the roller to achieve the correct sheet length and specific phase sliding between the blades; b) Stabilize the speed of the roller to a speed close to that of the material; c) Tension the web to ensure precise cutting; d) The blade engages while cutting the sheet, resulting in the web being converted into a sheet, and the blades engaging at approximately a right angle; e) Disengage the blade and feed the sheet to another process, wherein the sheet is pushed out of the station and prepared for cutting subsequent sheets; f) Return to the initial step.

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