Magnetic roll blade changing device

Abstract

This application discloses a magnetic cutter roller blade replacement device, relating to the field of die-cutting equipment technology. The device includes a frame, a cutter roller assembly, a replacement mechanism, and an angle adjustment mechanism. The cutter roller assembly includes a cutting roller (acting as a magnetic roller) and a driven roller, with flexible blades adsorbed onto its surface. The replacement mechanism includes a blade changing plate and a blade collection box. The angle adjustment mechanism is used to precisely control the rotation angle of the cutting roller, aligning the joints at both ends of the blade with the blade changing plate. The blade changing plate has a cutting edge at its front end, which can be inserted into the joint and pry up the blade. This application achieves automatic identification and alignment of the blade joints through non-contact angle adjustment combined with high-precision laser positioning; the blade changing plate, made of permanent magnet material, performs prying, adsorption, and guiding actions, and the blade collection box completes the automated disassembly and collection of old blades, effectively solving the problems of low efficiency, high risk, and easy damage to the cutter roller caused by manual blade replacement.

Description

Technical Field

[0001] This application relates to the field of die-cutting equipment technology, and in particular to a magnetic cutter roller blade replacement device. Background Technology

[0002] Flexible blades are a widely used material in die-cutting equipment, primarily for cutting soft materials such as paper, plastic films, and composite materials. Flexible blades are typically composed of a metal base plate and multiple layers of rubber material, offering excellent elasticity and wear resistance, and can be customized to specific shapes and sizes to meet different cutting requirements. During installation, the operator first overlaps the edge of the flexible blade on the surface of the magnetic blade roller. Then, as the roller slowly rotates, the blade is gradually released, utilizing the magnetic force of the roller surface to evenly adhere and fix it. The two ends of the blade meet on the roller surface, forming a clear seam.

[0003] During the continuous operation of die-cutting equipment, flexible blades need to be replaced periodically due to wear, deformation, or damage to ensure the quality and precision of die-cut products. Currently, the industry still relies heavily on manual operation for replacing flexible blades. Operators must use manual tools, such as pry bars or scrapers, to pry the old blade off the magnetic roller at the joint, manually roll it up, and then install the new blade. This process is not only inefficient but also particularly time-consuming and labor-intensive when dealing with large blade rollers or long blades. Furthermore, manual operation greatly increases the risk of operators being cut by the sharp edges of the blades, posing a significant safety hazard. At the same time, manual replacement makes it difficult to ensure the accuracy of the blade installation position, easily leading to blade misalignment or uneven joints, which in turn affects the precision and consistency of subsequent die-cutting.

[0004] Although some devices have been proposed in the prior art to assist in the removal of blades, such as simple prying structures near the magnetic roller, these devices are often single-function and cannot achieve automatic positioning, precise prying away, and efficient collection of the blades. Most devices are prone to damaging the blades or the surface of the magnetic roller during the prying process, and lack effective positioning and guiding mechanisms, resulting in the replacement process still relying on manual intervention, low automation, and inability to meet the needs of modern high-efficiency production.

[0005] Therefore, developing a magnetic cutter roller and blade replacement device that can achieve automated operation, improve replacement efficiency, ensure operational safety, and guarantee installation accuracy has become an important problem that urgently needs to be solved in this technical field. Summary of the Invention

[0006] To address the aforementioned problems, this application provides a magnetic cutter roller blade replacement device.

[0007] A magnetic blade roller replacement device includes a frame on which a blade roller assembly is mounted. The blade roller assembly includes a cutting blade roller and a driven roller. The cutting blade roller is a magnetic roller with a flexible blade magnetically adsorbed on its surface. The frame is equipped with a replacement mechanism and an angle adjustment mechanism. The replacement mechanism includes a blade changing plate and a blade receiving box. The angle adjustment mechanism is used to adjust the rotation angle of the cutting blade roller so that the butt joints at both ends of the flexible blade are aligned with the blade changing plate. The blade changing plate has a blade at one end facing the cutting blade roller and is configured to insert into and pry up the flexible blade from the butt joint.

[0008] Compared with existing technologies, the above-mentioned technical solution achieves automated disassembly of the flexible blade. The angle adjustment mechanism precisely controls the angle of the blade roller, aligning the joint with the blade changing plate. The blade at the front of the blade changing plate is then inserted into the joint and pried up the blade, replacing the traditional manual prying method. This significantly improves blade changing efficiency and operational safety, while reducing the risk of damage to the blade and blade roller.

[0009] Furthermore, the blade receiving box has a storage opening facing the blade changing plate; the surface of the blade changing plate is provided with a slope, which is configured to guide the pried-up flexible blade into the storage opening.

[0010] Compared with existing technologies, by adopting the above technical solution, the inclined surface on the blade changing plate forms a smooth transition channel, which can reliably guide the pried-off blade to the storage port of the blade collection box, realize the automatic collection of old blades, avoid the blades from getting tangled or stuck during the peeling process, and ensure the smoothness of the replacement process.

[0011] Furthermore, the blade changing plate is made of permanent magnet material and is used to attract the flexible blade during the prying process.

[0012] Compared with existing technologies, by adopting the above technical solution, the blade changing plate made of permanent magnet material can immediately attract the blade after it is pried up, effectively preventing the elastic blade end from rebounding or swinging randomly. This provides continuous traction for subsequent peeling and ensures that the blade can be smoothly guided to the blade receiving box while adhering to the inclined surface.

[0013] Furthermore, the angle adjustment mechanism includes control boxes symmetrically arranged on both sides of the cutting roller. Each control box contains a drive wheel and at least two driven wheels. The drive wheel is connected to a motor and is in contact with the surface of the driven wheel, driving the driven wheel to rotate through friction. The surface of the driven wheel is covered with a rubber layer, which is configured to be in contact with the surface of the cutting roller and drive its rotation.

[0014] Compared with existing technologies, the above-mentioned technical solution uses a non-contact friction transmission method to drive the cutting roller rotation, avoiding the need for complex connection structures at the roller shaft end. The rubber layer provides sufficient friction and can buffer contact impacts through deformation, achieving precise, stable, and damage-free adjustment of the cutting roller angle.

[0015] Furthermore, the two control boxes are connected by a first fixed shaft and a second fixed shaft. The tool changer is rotatably mounted on the first fixed shaft. The tool changer is connected to a driving component, which is fixedly mounted on the second fixed shaft to drive the tool changer to rotate around the first fixed shaft to perform a prying action.

[0016] Compared with existing technologies, the above-mentioned technical solution utilizes the fixed shaft connecting the two control boxes as the rotation fulcrum of the blade changer, resulting in a compact and stable structure. The rotation of the blade changer is controlled by an independent drive unit, achieving a precise and powerful prying action and ensuring a high success rate for initial peeling.

[0017] Furthermore, the replacement mechanism also includes a high-precision lead screw, which includes a lead screw, a motor that drives the lead screw, and a threaded block that cooperates with the lead screw. The threaded block is fixedly connected to the control box and is used to drive the control box to lift and lower, so that the driven wheel is in contact with or separates from the surface of the cutting roller.

[0018] Compared with existing technologies, by adopting the above technical solution, the high-precision lead screw can accurately control the overall lifting and lowering of the entire angle adjustment mechanism and the blade changer. This allows the driven wheel to precisely contact or separate from the cutting roller, and adjust the deformation of the rubber layer by controlling the downward pressure during contact, thereby achieving the switching between two functional states: drive rotation and rigid locking.

[0019] Furthermore, the frame is also provided with a positioning mechanism, which includes a first positioning component. The first positioning component includes two laser displacement sensors mounted opposite each other on the frame. The laser displacement sensors are configured to detect the two end faces of the flexible blade to identify the position of the butt joint.

[0020] Compared with existing technologies, by adopting the above technical solution, the concave features of the blade end face can be detected non-contactly using a high-precision laser displacement sensor. This enables the rapid and accurate identification of the butt joint position and ensures that it is precisely aligned with the blade changing plate. This provides a crucial positional reference for automatic blade prying and is the key to achieving full automation.

[0021] Furthermore, the positioning mechanism also includes a second positioning component and a measuring component. The measuring component includes a measuring plate fixedly mounted on the frame. The measuring plate has a groove, and a sliding rod is disposed in the groove. A sliding sleeve is slidably mounted on the sliding rod. The second positioning component includes two laser displacement sensors, which are mounted on the sliding rod through the sliding sleeve and are used to detect the installation position of the flexible blade.

[0022] Compared with existing technologies, by adopting the above technical solution, the second positioning component can be used to detect the position of the newly installed blade before blade replacement. Through a sliding sleeve structure, the distance between the two sensors can be flexibly adjusted to accommodate blades of different widths, thereby determining whether the blade is tilted or misaligned overall. This ensures that only correctly installed blades can enter the automatic replacement process, improving the safety and reliability of the process.

[0023] Furthermore, the surface of the measuring plate is provided with a scale to indicate the sliding position of the sliding sleeve.

[0024] Compared with existing technologies, by adopting the above technical solution, the scale provides an intuitive and accurate position reference, enabling operators to quickly and accurately adjust the sensor to the preset detection position, ensuring the consistency of the blade position detection benchmark, and simplifying the debugging and setting process.

[0025] Furthermore, the measuring assembly also includes a wing nut, which is threadedly connected to the sliding sleeve. A locking groove is provided on the measuring plate, through which the wing nut passes and connects to the sliding sleeve to lock the position of the sliding sleeve on the slide rod.

[0026] Compared with existing technologies, by adopting the above technical solution, the wing nut and locking groove constitute a simple yet effective mechanical locking mechanism. The sliding sleeve can be securely locked in the desired position by manually tightening the wing nut, preventing sensor displacement due to vibration during equipment operation and ensuring the long-term stability and accuracy of the detection process.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. It enables efficient replacement of flexible blades, significantly improving replacement efficiency and reducing labor costs and operational safety risks.

[0028] 2. Through the coordinated work of the angle adjustment mechanism and the positioning mechanism, the blade changing plate can be accurately aligned with the blade seam, achieving non-destructive and reliable initial prying. The magnetic attraction and guiding function of the blade changing plate enables the smooth and continuous peeling and automatic collection of the old blade.

[0029] 3. The device's structural design incorporates a pre-inspection function for the blade installation status, enhancing the intelligence and reliability of the entire blade changing process while reducing potential damage to the blade and expensive magnetic cutter roller. Attached Figure Description

[0030] Figure 1 It is a three-dimensional view of the device, mainly showing the overall structure of the device; Figure 2 It is a three-dimensional view of the device from another perspective, mainly showing the overall structure of the device; Figure 3 The main focus is on showcasing high-precision lead screws; Figure 4 The main focus is on showcasing the specific structure of the blade changer and storage port; Figure 5 This is a structural view of the driving wheel and the driven wheel; Figure 6 The main display area is the measuring board; Figure 7 The main exhibits are sliding rods and sliding sleeves.

[0031] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Cutting roller; 21. Flexible blade; 3. Driven roller; 4. Control box; 41. Driven wheel; 42. Drive wheel; 43. First fixed shaft; 44. Second fixed shaft; 5. High-precision lead screw; 52. Lead screw; 53. Threaded block; 6. Blade changing plate; 61. Drive component; 7. Blade receiving box; 71. Storage port; 8. First positioning assembly; 9. Second positioning assembly; 91. Measuring plate; 92. Slide rod; 93. Sliding sleeve; 95. Wing nut. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0034] A magnetic cutter roller blade replacement device includes: Reference Figure 1 and Figure 2 Frame 1 serves as the basic support structure for the entire device, upon which all functional components are directly or indirectly mounted.

[0035] Reference Figure 1 and Figure 2 The cutter roller assembly includes a cutting roller 2 and a driven roller 3. The cutting roller 2 is a magnetic roller, and its cylindrical surface is magnetically attached with a flexible blade 21. The two ends of the flexible blade 21 form a butt joint after being attached to the roller surface.

[0036] Reference Figure 1 , Figure 2 and Figure 4 The replacement mechanism is the core component for achieving automated disassembly of the blade 21, and mainly includes the blade changing plate 6, the blade receiving box 7, and the high-precision lead screw 5.

[0037] Reference Figure 1 , Figure 2 and Figure 4 The blade changing plate 6 has a high-strength steel blade at one end facing the cutting roller 2, used to cut into the butt joint of the blade skin 21. The blade changing plate 6 is made of permanent magnet material, which can magnetically attract the peeled part after the blade skin 21 is pried up, preventing it from springing back or swinging randomly. The surface of the blade changing plate 6 is designed with a bevel, which guides the pried blade skin 21 towards the blade receiving box 7.

[0038] Reference Figure 1 , Figure 2 and Figure 4 The blade collection box 7 is fixedly mounted on the frame 1, and has a storage opening 71 facing the blade changing plate 6. The old blades 21, which are pried up and guided by the blade changing plate 6, eventually enter the blade collection box 7 through the storage opening 71 for collection. Since the blades 21 naturally curl up and increase in volume after being detached from the magnetic attraction of the blade changing plate 6, they can be effectively contained in the box without the need for an additional exit locking structure.

[0039] Reference Figure 3 The high-precision lead screw 5 consists of a motor, a lead screw 52, ​​and a threaded block 53. The threaded block 53 is fixedly connected to the control box 4. The motor drives the lead screw 52 to rotate, which can precisely control the lifting and lowering movement of the threaded block 53 and the control box 4 connected to it. In this embodiment, the high-precision lead screw 5 has two strokes, both of which are controlled by a program.

[0040] Reference Figure 5 An angle adjustment mechanism is used to precisely control the rotation angle of the cutting roller 2, ensuring that the butt joint of the blade 21 is accurately aligned with the blade of the blade changing plate 6.

[0041] Reference Figure 1 and Figure 5Two control boxes 4 are symmetrically arranged on both sides of the cutting roller 2. Each control box 4 contains a drive wheel 42 driven by a motor and at least two driven wheels 41. The drive wheel 42 and the driven wheels 41 transmit power through frictional force from their surface contact.

[0042] Reference Figure 1 and Figure 5 The driven wheel 41 has a rubber layer with a thickness of not less than 2 cm on its surface. When the high-precision lead screw 5 drives the control box 4 to descend, the driven wheel 41 comes into contact with the surface of the cutting roller 2 under pressure, and the rubber layer deforms. On the one hand, it provides sufficient friction to drive the cutting roller 2 to rotate, and on the other hand, its deformation can be used to achieve different functional stages.

[0043] Reference Figure 1 and Figure 2 The fixed shaft and drive component 61, along with the two control boxes 4, are connected to form a stable frame via a first fixed shaft 43 and a second fixed shaft 44. The tool changer 6 is rotatably mounted on the first fixed shaft 43. In this embodiment, the drive component 61 is selected as a cylinder, which is fixedly mounted on the second fixed shaft 44, with its telescopic shaft hinged to one end of the tool changer 6. Through the telescopic extension of the drive component 61, the tool changer 6 can be driven to rotate around the first fixed shaft 43, completing the prying action.

[0044] Reference Figure 1 and Figure 2 The positioning mechanism is used to detect the status of the blade 21 to ensure the safety and accuracy of the blade changing process.

[0045] Reference Figure 1 and Figure 2 The first positioning component 8 includes two laser displacement sensors mounted opposite each other on the frame 1. They are configured to emit lasers and receive signals reflected from the end face of the blade 21, precisely locating the position of the butt joint by detecting the concave surface formed on the end face due to the presence of the butt joint. When both sensors simultaneously detect the concave surface, the system determines that the butt joint is aligned with the blade edge of the blade changer 6.

[0046] Reference Figure 2 , Figure 6 and Figure 7 The second positioning component 9 and the measuring component are used to detect whether the blade 21 is installed correctly (whether there is tilt or excessive offset) before the blade is changed.

[0047] Reference Figure 2 , Figure 6 and Figure 7 The measuring assembly includes a measuring plate 91 fixed to the frame 1, with graduations engraved on the plate. A groove is formed in the measuring plate 91, and a slide rod 92 is fixed in the groove. A slidable sleeve 93 is mounted on the slide rod 92.

[0048] Reference Figure 2 , Figure 6 and Figure 7 The second positioning component 9 includes two laser displacement sensors, which are mounted on the slide rod 92 via a sliding sleeve 93. The operator can adjust the distance between the two sensors on the slide rod 92 according to the width of the blade 21 and the scale on the measuring plate 91, and then lock them in place using a wing nut 95. The wing nut 95 passes through a locking groove on the measuring plate 91 and is threaded into the sliding sleeve 93; tightening it securely locks the sensor positions.

[0049] The implementation principle of this application embodiment is as follows: Step 1: Pre-inspection and baseline setting of blade 21 installation status After the operator installs the new flexible blade 21 onto the cutting roller 2, the second positioning component 9 needs to be preset. By sliding the sliding sleeve 93 of the measuring component and referring to the scale on the measuring plate 91, the distance between the two laser displacement sensors is adjusted to be greater than the width of the blade 21 by a preset tolerance value (usually no more than two millimeters). Then, the wing nut 95 is tightened and passed through the locking groove to firmly lock the sliding sleeve 93 onto the sliding rod 92.

[0050] This operation establishes the baseline for detecting the position of the blade 21. The preset spacing allows the sensor to sensitively detect the edge of the blade 21, providing a basis for subsequent judgment on whether the blade 21 is installed correctly.

[0051] Start the equipment to allow the cutting roller 2 to rotate slowly. The two laser displacement sensors of the second positioning component 9 continuously measure the distance to the roller surface. If the readings of the two sensors are stable and consistent, it indicates that the blade 21 is installed straight and without tilt, and the system determines that it is allowed to enter the automatic blade changing program.

[0052] If, during rotation, either sensor detects two alternating values, it indicates that the blade 21 is tilted; if there is a constant difference between the two sensor readings, it indicates that the blade 21 is biased overall. This diagnosis is the primary prerequisite for safe tool changing. If the result is tilting, the system will alarm and prohibit automatic tool changing, because the tilted joint will prevent the blade of the tool changing plate 6 from being inserted vertically and completely. If the bias is only slight and the system determines that it is still within the effective working range of the tool changing plate 6, tool changing can continue.

[0053] Step 2: Safe Approach and Initial Positioning The blade changing program is initiated. The motor driving the high-precision lead screw 52 rotates, causing the threaded block 53 and the control box 4 fixed thereto to descend as a whole. This is the first stage of the stroke. The core of this stage is driving while avoiding obstacles. According to the preset program, the high-precision lead screw 5 precisely controls the downward movement, so that the rubber layer of the driven wheel 41 is in contact with the surface of the cutting roller 2, and produces an initial deformation (compression of not less than 0.5cm). This deformation provides sufficient friction to drive the cutting roller 2 to rotate. At the same time, precise stroke control ensures that a safe gap is maintained between the blade of the blade changing plate 6 and the protruding blade head on the blade skin 21, avoiding collision and damage between the blade and the blade head during the positioning rotation process.

[0054] Step 3: Precise gap positioning and rigid system locking Driven by the driven wheel 41, the cutting roller 2 rotates slowly. Simultaneously, two laser displacement sensors symmetrically arranged in the first positioning assembly 8 continuously scan the two end faces of the blade 21, detecting the concave features formed by the butt joint. Utilizing the high precision and non-contact characteristics of laser ranging, the position signal of the blade 21's butt joint is detected. When both laser displacement sensors simultaneously detect the concave signal, the system immediately stops the cutting roller 2. At this moment, the butt joint of the blade 21 is precisely aligned below the blade of the blade changing plate 6. Precise positioning of the prying starting point is achieved, creating the necessary conditions for the next insertion action.

[0055] The high-precision lead screw 5 immediately executes the second stroke, driving the control box 4 to descend slightly again.

[0056] The second stroke further compresses the rubber layer of the driven wheel 41, causing it to deform more significantly. This utilizes the enormous static friction generated by the rubber layer to rigidly lock the cutting roller 2 to a stop. This locking effect provides an absolutely stable fulcrum for the subsequent prying action, effectively preventing any slight rotation of the cutting roller 2 when the blade changing plate 6 is under force, ensuring the stability, reliability, and accuracy of the initial prying action.

[0057] Step 4: Non-destructive insertion and initial magnetic attraction and prying off During the descent of the second phase of the stroke, the blade changer 6, fixed to the frame of the control box 4, descends synchronously, its high-strength steel blade precisely inserted along the aligned seam. Cutting is achieved from the joint in the blade skin 21 structure, reducing the risk of damage to the blade skin 21 body and the surface of the cutting roller 2. After the blade is inserted, the drive unit 61 is activated, its telescopic shaft retracts, pulling the blade changer 6 to rotate around the first fixed axis 43, performing a lifting motion. This forcibly peels the edge of the blade skin 21 from the magnetic roller surface.

[0058] At the moment of peeling, the blade changing plate 6, made of permanent magnet material, immediately and firmly attracts the pried-up blade tip 21. This design has three functions: first, to prevent the peeled blade tip 21 from springing back due to elasticity; second, to provide continuous traction for subsequent peeling processes; and third, to ensure that the peeled blade tip 21 adheres tightly to the inclined surface of the blade changing plate 6, preparing it for guidance and collection.

[0059] After the initial prying is completed, the high-precision lead screw 5 slightly rises, releasing the lock on the cutting roller 2. The motor of the angle adjustment mechanism restarts, driving the cutting roller 2 to rotate slowly and continuously along the direction in which the blade 21 was pried up (i.e., the peeling direction). The continuous rotation of the cutting roller 2 ensures that the entire blade 21 is peeled off the roller surface evenly and continuously. The peeled blade 21, under the magnetic attraction of the blade changing plate 6, adheres tightly to its surface and is smoothly guided along the preset slope to the storage opening 71 of the blade receiving box 7. The blade changing plate 6 integrates guiding and adsorption functions in this process, ensuring a smooth and compact peeling and conveying process.

[0060] As the blade 21 is guided to the storage opening 71 and begins to enter the blade collection box 7, it gradually moves out of the effective magnetic attraction range of the blade changing plate 6. Once freed from magnetic constraint, the naturally elastic blade 21 curls up naturally. This curling significantly increases its volume, causing it to naturally accumulate and jam inside the blade collection box 7. This characteristic prevents the blade 21 from easily retracting once it enters. This design eliminates the need for a mechanical opening and closing mechanism at the storage opening 71, simplifying the device and improving reliability.

[0061] After the cutting roller 2 completes one full rotation, the entire old blade sheet 21 is completely peeled off and transported to the blade collection box 7 for collection. Subsequently, all actuators are reset, awaiting the next work instruction.

[0062] The programs, systems, and control modules involved in the above process are all set to standard, and the process is not described.

[0063] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A magnetic cutter roller blade replacement device, characterized in that, The assembly includes a frame (1), on which a blade roller assembly is provided. The blade roller assembly includes a cutting blade roller (2) and a driven roller (3). The cutting blade roller (2) is a magnetic roller with a flexible blade (21) magnetically adsorbed on its surface. The frame (1) is provided with a replacement mechanism and an angle adjustment mechanism. The replacement mechanism includes a blade changing plate (6) and a blade receiving box (7). The angle adjustment mechanism is used to adjust the rotation angle of the cutting blade roller (2) so that the butt joints at both ends of the flexible blade (21) are aligned with the blade changing plate (6). The blade changing plate (6) has a blade at one end facing the cutting blade roller (2). The blade changing plate (6) is configured to insert into and pry up the flexible blade (21) from the butt joint.

2. The magnetic cutter roller blade replacement device according to claim 1, characterized in that, The blade receiving box (7) has a storage opening (71) facing the blade changing plate (6); the surface of the blade changing plate (6) is provided with a slope, which is configured to guide the pried flexible blade (21) into the storage opening (71).

3. The magnetic cutter roller blade replacement device according to claim 1, characterized in that, The blade changing plate (6) is made of permanent magnet material and is used to attract the flexible blade (21) during the prying process.

4. The magnetic cutter roller blade replacement device according to claim 1, characterized in that, The angle adjustment mechanism includes control boxes (4) symmetrically arranged on both sides of the cutting roller (2). Each control box (4) is provided with a drive wheel (42) and at least two driven wheels (41). The drive wheel (42) is connected to a motor. The drive wheel (42) is in contact with the surface of the driven wheel (41) and drives the driven wheel (41) to rotate by friction. The surface of the driven wheel (41) is covered with a rubber layer, which is configured to be in contact with the surface of the cutting roller (2) and drive it to rotate.

5. The magnetic cutter roller blade replacement device according to claim 4, characterized in that, The two control boxes (4) are connected by a first fixed shaft (43) and a second fixed shaft (44). The tool changer (6) is rotatably mounted on the first fixed shaft (43). The tool changer (6) is connected to a drive member (61). The drive member (61) is fixedly mounted on the second fixed shaft (44) and is used to drive the tool changer (6) to rotate around the first fixed shaft (43) to perform a prying action.

6. The magnetic cutter roller blade replacement device according to claim 5, characterized in that, The replacement mechanism also includes a high-precision lead screw (5), which includes a lead screw (52), a motor that drives the lead screw (52), and a threaded block (53) that cooperates with the lead screw (52). The threaded block (53) is fixedly connected to the control box (4) and is used to drive the control box (4) to lift and lower, so that the driven wheel (41) is in contact with or separate from the surface of the cutting roller (2).

7. The magnetic cutter roller blade replacement device according to claim 1, characterized in that, The frame (1) is also provided with a positioning mechanism, which includes a first positioning component (8). The first positioning component (8) includes two laser displacement sensors mounted opposite each other on the frame (1). The laser displacement sensors are configured to detect the two end faces of the flexible blade (21) to identify the position of the butt joint.

8. A magnetic cutter roller blade replacement device according to claim 7, characterized in that, The positioning mechanism further includes a second positioning component (9) and a measuring component. The measuring component includes a measuring plate (91) fixedly installed on the frame (1). The measuring plate (91) has a groove, and a slide rod (92) is provided in the groove. A sliding sleeve (93) is slidably installed on the slide rod (92). The second positioning component (9) includes two laser displacement sensors. The laser displacement sensors are installed on the slide rod (92) through the sliding sleeve (93) and are used to detect the installation position of the flexible blade (21).

9. A magnetic cutter roller blade replacement device according to claim 8, characterized in that, The measuring plate (91) has a scale on its surface to indicate the sliding position of the sliding sleeve (93).

10. A magnetic cutter roller blade replacement device according to claim 9, characterized in that, The measuring assembly also includes a wing nut (95), which is threadedly connected to the sliding sleeve (93). A locking groove is provided on the measuring plate (91), and the wing nut (95) passes through the locking groove and is connected to the sliding sleeve (93) to lock the position of the sliding sleeve (93) on the slide rod (92).

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