A cutting servo device of a four-roller cutting apparatus and a method of using the same

Abstract

This invention discloses a fabric cutting follow-up device for a four-roller fabric cutting machine and its usage method, belonging to the field of textile machinery cutting technology. The device integrates a cutter assembly, a position detection assembly, a manual adjustment assembly, and a servo follow-up assembly. The manual adjustment assembly enables coarse adjustment of the cutter angle and detection position upon startup. A double-clamp pusher structure with unequal elasticity double springs continuously conforms to the fabric edge, while a pull rope sensor collects bidirectional lateral offset signals of the fabric in real time. The PLC control system drives the servo follow-up assembly to synchronously compensate for the cutter displacement. This invention achieves integrated cutting operations of manual coarse adjustment, real-time detection, and automatic fine adjustment, effectively eliminating cutting defects caused by fabric offset, significantly improving cutting accuracy and production efficiency, and reducing labor load and production costs. The device has a high degree of modular integration and can be directly installed on existing equipment without significant modifications. It is adaptable to various fabric cutting conditions, exhibiting strong versatility and operational stability.

Description

Technical Field

[0001] This invention belongs to the technical field of fabric cutting equipment, and specifically relates to a fabric cutting follow-up device for a four-roller fabric cutting equipment and its usage method. Background Technology

[0002] In the existing fabric cutting process of four-roller fabric cutting equipment, the cutters of traditional cutting equipment all adopt a fixed installation structure and do not have a position follow-up compensation function. During the fabric conveying and cutting process, the fabric is easily affected by a variety of factors such as asynchronous rotation of the equipment rollers, uneven fabric conveying tension, and the material characteristics of the fabric itself, which can easily cause random lateral deviation.

[0003] The existing fixed cutter structure cannot adaptively adjust its position to follow the lateral shift of the fabric, leading to numerous production defects: First, poor cutting accuracy. Fabric shift causes misalignment between the cutter and the fabric cutting reference, resulting in cutting size deviations exceeding process standards. In severe cases, this can lead to problems such as incomplete cuts, missed cuts, and off-center cuts, causing a large amount of fabric to be scrapped and significantly increasing production material costs. Second, high reliance on manual labor and low production efficiency. During production, operators need to monitor the fabric position in real time and frequently manually adjust the cutter position, resulting in high labor intensity and significant lag in manual adjustments, making it unsuitable for continuous high-speed cutting production. Third, there is currently no integrated cutter follow-up solution in the industry suitable for four-roller fabric cutting equipment. Modifying traditional equipment is difficult and costly, and cannot simultaneously meet the production requirements of high precision, automation, and low labor costs. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing four-roller fabric cutting equipment, such as fixed cutters and lack of follow-up compensation capabilities, which leads to low cutting accuracy. This invention provides a fabric cutting follow-up device for four-roller fabric cutting equipment and its usage method. By integrating manual adjustment, servo follow-up, and position detection into a single structure, this invention achieves integrated operation of initial manual coarse adjustment of the cutter, real-time detection of fabric offset, and automatic follow-up fine adjustment of the cutter. This effectively reduces manual labor intensity, significantly improves fabric cutting accuracy and production efficiency, and reduces product defect rates.

[0005] To solve the above-mentioned technical problems, the present invention provides a fabric cutting follow-up device for a four-roller fabric cutting machine, including a cutting blade assembly, a position detection assembly, a manual adjustment assembly, and a servo follow-up assembly;

[0006] The cutting assembly includes multiple sets of cutting blades for cutting fabric, and the multiple sets of cutting blades are spaced apart on a cutting shaft that spans the fabric, thereby cutting the fabric.

[0007] The position detection component is mounted on the cutter shaft and can abut against the edge of the fabric to detect the lateral movement of the fabric.

[0008] The manual adjustment component is located on one side of the position detection component. The position detection component is manually driven to move laterally along the cutter axis to achieve coarse adjustment.

[0009] The servo follow-up component is located on one side of the position detection component, and drives the position detection component to move laterally along the cutter axis via a servo method to achieve follow-up adjustment.

[0010] Preferably, the position detection component includes a detection bracket, on which a spring rod is mounted horizontally, and a push plate assembly is slidably connected;

[0011] A spring assembly is sleeved on the spring rod, and under the action of the spring assembly, the push plate assembly floats on the spring rod along its length.

[0012] Preferably, the pusher assembly includes a pusher bracket and a double-clamp pusher. The pusher bracket is slidably mounted on the spring rod via a bushing. The double-clamp pusher includes an upper pusher and a lower pusher symmetrically arranged. A gap is reserved between the upper pusher and the lower pusher to accommodate the fabric thickness. They fit and abut against the edge of the fabric by clamping each other.

[0013] Preferably, the spring assembly includes a left spring and a right spring, which are located on both sides of the push plate assembly. The preset elastic force of the right spring is greater than that of the left spring. Under the condition of no external force intervention, the difference in elastic force ensures that the push plate assembly always maintains the initial contact pressure, stably abuts against the edge of the fabric, and ensures the continuity of offset detection.

[0014] Preferably, the position detection component further includes a sliding bushing, which is slidably connected to the cutter shaft.

[0015] The manual adjustment assembly includes a first lead screw and a first lead screw nut adapted to the first lead screw; the first lead screw nut is connected to the sliding bushing via a connecting rod.

[0016] The first lead screw has a first adjustment handle at its end. By manually rotating the first adjustment handle, the first lead screw nut drives the position detection component to slide along the cutter shaft.

[0017] Preferably, the servo follow-up component includes a servo motor, a second lead screw, and a second lead screw nut adapted to the second lead screw. The second lead screw nut is movably connected to the cutter shaft through a sliding bracket and a linear bearing. Under the action of the servo motor, the second lead screw nut drives the cutter shaft and the cutter on the cutter shaft to move laterally.

[0018] Preferably, the position detection component further includes a pull rope sensor, wherein the movable end of the pull rope sensor is connected to the push plate assembly;

[0019] The pull cord sensor is electrically connected to the control system of the servo motor. When the push plate assembly moves laterally following the fabric, the pull cord sensor collects displacement data in real time and converts it into an electrical signal, which is then transmitted to the control system. The control system drives the servo motor to operate, so that the lateral displacement of the cutter is synchronized with the offset of the fabric, thereby achieving precise follow-up compensation.

[0020] Preferably, the cutter includes a blade and a blade holder, the blade being detachably mounted on the cutter shaft via the blade holder; the end of the cutter shaft is provided with a second adjusting handle, by manually rotating the second adjusting handle, the cutter shaft and the cutter on the cutter shaft are driven to rotate around the linear bearing, thereby adjusting the angle of the cutter.

[0021] Preferably, a linear guide rail is also provided on the outer side of the cutter shaft, and the linear guide rail is connected to the sliding bracket at the position of the linear bearing, thereby guiding the cutter shaft and the cutter on the cutter shaft to move laterally.

[0022] The present invention also provides a method for using the fabric cutting follow-up device of a four-roller fabric cutting machine, comprising the following steps:

[0023] Step A: Power on the machine and manually perform coarse calibration to complete the initial alignment of the equipment.

[0024] Step A1: According to the material, thickness and cutting process requirements of the fabric to be cut, manually rotate the second adjustment handle to drive the cutter shaft to rotate relative to the linear bearing, adjust the cutting angle of the cutter, and lock the positioning structure after adjustment to fix the cutting angle of the cutter.

[0025] Step A2: Manually rotate the first adjustment handle to drive the first lead screw to rotate. Through the linkage of the first lead screw nut and the sliding bushing, the entire position detection component is driven to slide laterally along the cutter shaft, so that the upper and lower clamps of the double-clamp push plate accurately fit and clamp the edge of the fabric.

[0026] Step A3: Utilize the difference in elasticity between the left and right springs to keep the push plate assembly in stable pre-tight pressure against the edge of the fabric. After confirming that the cutting benchmark of the cutter and the detection position of the push plate are correct, lock all manual adjustment structures to complete the initial coarse adjustment calibration.

[0027] Step B: The equipment operates automatically, achieving fabric follow-up cutting compensation.

[0028] Step B1: Start the four-roller fabric cutting equipment and the control system of this follow-up device. The fabric is conveyed at a uniform speed. The pull rope sensor collects the lateral position displacement signal of the push plate assembly in real time and continuously transmits the detection electrical signal to the control system.

[0029] Step B2: When the fabric shifts laterally to one side of the pusher assembly, the edge of the fabric pushes the double-clamp pusher to slide, compressing the corresponding side spring. The pusher assembly generates displacement in the same direction. The pull rope sensor collects positive offset data and feeds it back to the control system. The control system drives the servo motor to run, which drives the sliding bracket and the cutter shaft to move in the same direction by the second lead screw and the second lead screw nut, thus completing the positive follow-up compensation of the cutter.

[0030] Step B3: When the fabric shifts laterally to the other side of the pusher assembly, the compressed spring resets, and the pusher assembly slides in the opposite direction following the edge of the fabric, relying on the difference in spring force on both sides. The pull cord sensor synchronously collects the reverse displacement signal, and the control system drives the servo motor to run in the opposite direction, driving the cutter to synchronously compensate for the reverse displacement. Throughout the process, the cutter is always aligned with the fabric cutting reference, realizing continuous and precise automated follow-up cutting operations.

[0031] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:

[0032] 1. This invention is an integrated modular structure that can be directly and detachably installed on the frame of an existing four-roller fabric cutting machine without requiring major modifications to the original equipment. It is easy to modify, highly versatile, and can adapt to the cutting process requirements of fabrics of different thicknesses and materials.

[0033] 2. This invention only requires manual coarse adjustment of the cutting blade angle, position, and detection mechanism once before starting the machine according to the fabric specifications. The entire cutting process does not require real-time monitoring or frequent manual blade adjustment by the operator, which completely changes the traditional equipment's highly manual operation mode, greatly reduces the intensity of manual work, and saves labor costs.

[0034] 3. This invention captures the bidirectional lateral offset of the fabric in real time through a position detection component, converts it into an electrical signal through a sensor, and accurately feeds it back to the control system. This drives the servo component to drive the cutter to synchronously compensate for displacement, completely solving the problems of off-center cutting, empty cutting, and out-of-tolerance dimensions caused by fabric offset in traditional fixed cutters, and significantly reducing the product defect rate.

[0035] 4. The position detection component of this invention adopts a double-spring elasticity difference structure to achieve adaptive fitting of the push plate, accurate bidirectional offset detection without lag, strong anti-interference ability of the mechanical linkage structure, and guide and limit the linear guide rail to ensure the stability and accuracy of the cutter's displacement, making it suitable for long-term continuous cutting operations. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the installation of the fabric cutting follower device on a four-roller fabric cutting machine;

[0037] Figure 2A first-view structural schematic diagram of the fabric cutting follower device provided by the present invention;

[0038] Figure 3 This is a structural schematic diagram of the fabric cutting follower device provided by the present invention from a second perspective.

[0039] Figure 4 This is a top view of the fabric cutting follower device provided by the present invention;

[0040] Figure 5 A schematic diagram of the structure of the position detection component provided by the present invention;

[0041] Figure 6 A top view of the position detection component provided by the present invention;

[0042] Figure 7 A side view of the position detection component provided by the present invention;

[0043] Figure 8 A schematic diagram of the structure of the manual adjustment component provided by the present invention;

[0044] Figure 9 This is a schematic diagram of the servo follower component provided by the present invention.

[0045] The meanings of the markings in the attached diagram are as follows:

[0046] In the diagram: 1-Cutter assembly, 101-Cutter, 102-Cutter shaft, 103-Second adjusting handle, 104-Linear guide rail, 2-Position detection assembly, 201-Detection bracket, 202-Spring rod, 203-Push plate assembly, 2031-Push plate bracket, 2032-Double clamp push plate, 204-Spring group, 2041-Left spring, 2042-Right spring, 205-Sliding bushing, 206-Pull rope sensor, 3-Manual adjustment assembly, 301-First lead screw, 302-First lead screw nut, 303-First adjusting handle, 4-Servo follow-up assembly, 401-Servo motor, 402-Second lead screw, 403-Second lead screw nut, 404-Sliding bracket, 405-Linear bearing, 100-Fabric. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Example

[0051] This invention provides a fabric cutting follower device for a four-roller fabric cutting machine, such as... Figure 1 As shown, the entire unit is integrated and installed on the frame of the four-roller fabric cutting machine, requiring no major modifications to the existing equipment structure. For further details, please refer to [link to relevant documentation]. Figure 2-4 The whole is assembled from four major functional modules: the cutting blade assembly 1, the position detection assembly 2, the manual adjustment assembly 3, and the servo follow-up assembly 4. Each module works together, adjusts independently, and operates in conjunction with each other, fundamentally solving the industry pain points of traditional fixed blade cutting offset, empty cut, off-center cut, and lag in manual adjustment.

[0052] Specifically, the cutting assembly 1 is the main cutting component of this device, comprising multiple sets of cutters 101 and a horizontally mounted cutting shaft 102. The multiple sets of cutters 101 are evenly spaced along the axial direction of the cutting shaft 102, spanning 100mm of the fabric to be processed, and can complete multiple fabric slitting operations at once. The cutters 101 adopt a detachable assembly structure, with the blades locked and fixed to the cutting shaft 102 by matching blade holders. This facilitates easy disassembly and assembly, allowing for convenient replacement, sharpening, and routine maintenance of worn blades, and adapts to processing needs for different cutting widths and fabric materials.

[0053] Furthermore, a second adjusting handle 103 is fixedly mounted on the end of the cutting shaft 102. The cutting shaft 102 is rotatably engaged with the sliding bracket 404 via a linear bearing 405. When the operator manually rotates the second adjusting handle 103, the entire cutting shaft 102 and all the cutting blades 101 on the shaft can be driven to rotate synchronously around the axis of the linear bearing 405, precisely adjusting the cutting angle between the cutting blades 101 and the plane of the fabric 100. The angle can be adjusted differently according to the cutting characteristics of thin fabrics, thick fabrics, elastic fabrics, and high-density fabrics, effectively avoiding problems such as fuzzing, tearing, and breaking of the fabric during cutting. After the angle adjustment is completed, the angle position can be locked by the locking structure to ensure that the angle remains constant during the operation.

[0054] In this embodiment, as Figure 5-7 As shown, the position detection component 2 is the core of the signal acquisition of this device, used to monitor the bidirectional lateral offset of the fabric 100 in real time during the conveying process. Specifically, it includes a detection bracket 201, a spring rod 202, a push plate assembly 203, a spring group 204, a sliding bushing 205, and a pull rope sensor 206. The detection bracket 201 is fixed to the outside of the sliding bushing 205, which is slidably sleeved on the outside of the cutter shaft 102, allowing the entire position detection component 2 to slide freely along the axial direction of the cutter shaft 102. The detection bracket 201 horizontally supports the spring rod 202, with the axis of the spring rod 202 parallel to the axis of the cutter shaft 102, ensuring that the detection displacement and the cutting displacement are completely consistent.

[0055] The push plate assembly 203 is slidably sleeved on the spring rod 202 via a bushing and can float horizontally back and forth along the spring rod 202. The push plate assembly 203 consists of a push plate bracket 2031 and a double-clamp push plate 2032. The double-clamp push plate 2032 adopts an upper and lower symmetrical structure, with a small gap reserved between the upper push plate and the lower push plate. It fits against the side edge of the fabric 100 by clamping it from the top and bottom. Compared with the traditional single-sided contact detection structure, it can effectively avoid detection inaccuracies caused by fabric shaking, edge flipping, and edge curling.

[0056] Furthermore, a spring assembly 204 is fitted onto the spring rod 202. The spring assembly 204 includes a left spring 2041 and a right spring 2042 respectively arranged on the left and right sides of the push plate assembly 203. During assembly, the spring force of the right spring 2042 is preset to be greater than that of the left spring 2041. In the initial state where the equipment is unloaded and the fabric is not offset, the difference in spring force between the two sides continuously pushes the push plate assembly 203 to maintain a stable pre-tight bonding pressure, ensuring that the double-clamp push plate 2032 is always tightly bonded to the edge of the fabric 100 without gaps or separation, thus ensuring that the detection benchmark is always effective. When the fabric 100 shifts laterally in any direction to the left or right, one side of the spring can be compressed and the other side of the spring can be released, causing the push plate assembly 203 to float synchronously with the fabric, achieving bidirectional, dead-angle-free offset following detection.

[0057] In this embodiment, the pull rope sensor 206 is fixedly installed on the detection bracket 201. The movable end of the telescopic pull rope of the pull rope sensor 206 is fixedly connected to the push plate assembly 203, and the extension and retraction direction of the pull rope is completely consistent with the floating direction of the push plate. The pull rope sensor 206 is electrically connected to the equipment PLC control system and the servo motor 401, which can convert the mechanical floating displacement of the push plate assembly 203 into a standard electrical signal in real time and continuously, and feed it back to the control system in real time, providing accurate and lag-free raw data for subsequent servo follow-up compensation.

[0058] For details, please refer to Figure 8 The manual adjustment component 3 is the initial calibration and adjustment mechanism of this device, mainly used for coarse adjustment of the detection position before the equipment is started, adapting to production changes of different widths of fabric. Specifically, it includes a first lead screw 301, a first lead screw nut 302, and a first adjustment handle 303. The first lead screw 301 is arranged horizontally and parallel to the cutter shaft 102. The first lead screw nut 302 is threadedly matched with the first lead screw 301 for transmission. The first lead screw nut 302 is fixedly connected to the sliding bushing 205 of the position detection component 2 through a rigid connecting rod. The first adjustment handle 303 is fixedly mounted on the end of the first lead screw 301. When changing fabric types during startup, operators can manually rotate the first adjusting handle 303 to drive the first lead screw 301 to rotate. This rotation is converted into linear thrust through the lead screw and nut transmission structure, causing the sliding bushing 205 and the entire position detection assembly 2 to slide smoothly laterally along the cutter shaft 102. This quickly adjusts the left and right positions of the double-clamp push plate 2032, ensuring precise alignment and contact with the edge of the current fabric 100, completing the initial coarse adjustment of the equipment. After adjustment, the lead screw position can be locked using the locking structure to prevent displacement during operation. This manual coarse adjustment structure is convenient to operate, provides linear and stable adjustment, and can quickly adapt to fabric production changes of different widths and specifications.

[0059] For further details, please refer to Figure 9The servo follow-up component 4 is the automatic compensation actuator of this device and the core power unit for realizing follow-up cutting. Specifically, it includes a servo motor 401, a second lead screw 402, a second lead screw nut 403, a sliding bracket 404, and a linear bearing 405. The servo motor 401 is fixed on the motor mounting base of the equipment frame. The output shaft of the servo motor 401 is coaxially connected to the second lead screw 402 through a coupling. The second lead screw 402 is arranged parallel to the cutter shaft 102. The second lead screw nut 403 is threadedly fitted onto the second lead screw 402 and is fixedly connected to the sliding bracket 404. The sliding bracket 404 is movably connected to the cutter shaft 102 via a linear bearing 405. At the same time, the sliding bracket 404 and the linear guide rail 104 mounted on the outside of the cutter shaft 102 are in sliding engagement. The linear guide rail 104 and the linear bearing 405 together form a double guide limiting structure, which can strictly limit the movement trajectory of the cutter shaft 102, retaining only the horizontal lateral sliding degree of freedom, completely eliminating the problems of wobbling, deflection, and jamming of the cutter shaft 102, and ensuring displacement accuracy.

[0060] During normal cutting operations, the servo motor 401 receives offset commands from the PLC control system and starts and stops precisely, rotating in both directions. This drives the second lead screw 402 to rotate, causing the second lead screw nut 403 and the sliding bracket 404 to slide precisely laterally along the linear guide rail 104. This, in turn, causes the cutter shaft 102 and the cutter 101 to move laterally synchronously as a whole. The displacement amount and direction are completely matched with the offset data of the fabric 100 collected by the position detection component 2, achieving real-time synchronous movement between the cutter 101 and the fabric 100. This ensures that the cutting edge of the cutter 101 is always aligned with the cutting reference position of the fabric 100, eliminating cutting deviations at the source.

[0061] Based on the above structure, the overall working process of this invention is divided into two stages: manual coarse adjustment calibration upon startup and fully automatic follow-up cutting. The entire process is logically coherent and precisely coordinated. In the startup and changeover stage, the operator adjusts the cutting angle of the cutter 101 and locks it in place using the second adjustment handle 103, according to the thickness, material, and cutting process requirements of the fabric 100 to be processed. Then, the operator fine-tunes the overall position of the position detection component 2 using the first adjustment handle 303, so that the double-clamp push plate 2032 stably clamps the edge of the fabric 100. The difference in elasticity between the left and right springs ensures a pre-tight fit, and all manual adjustment structures are locked, completing the initial benchmark calibration. During the production operation phase, the four-roller fabric cutting equipment drives the fabric 100 to be conveyed at a constant speed, and the pull rope sensor 206 continuously collects the floating displacement signal of the push plate assembly 203. When the fabric 100 shifts laterally in the forward or reverse direction, the control system analyzes the shift data in real time and drives the servo motor 401 to accurately compensate in both forward and reverse directions, so that the cutter 101 shifts synchronously with the fabric 100. The cutting position is dynamically corrected throughout the process, realizing continuous, stable, and high-precision automated cutting operations without the need for real-time manual monitoring and intervention.

[0062] This invention features a highly integrated overall structure, compact assembly, and strong operational stability. The components work together logically and are closely coordinated. Through a closed-loop control structure that combines mechanical spring adaptive fitting, real-time sensor acquisition, and precise servo compensation, it solves the technical problem that traditional fixed cutting blades cannot dynamically adapt to fabric offset.

[0063] This device can be disassembled and retrofitted into existing four-roller fabric cutting equipment without large-scale modifications to the main structure of the equipment. It has low modification costs, wide applicability, and is suitable for continuous cutting production of various textile fabrics.

[0064] The assembly methods, connection structures, electrical control logic, and installation processes not described in detail in this invention are all existing conventional and mature technologies in the field and are not within the scope of innovation protection of this invention. This invention focuses on protecting the integrated combination structure of each functional component, the bidirectional adaptive detection structure, the manual coarse adjustment and servo fine adjustment collaborative control structure, and the corresponding cutting process methods.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fabric cutting follow-up device for a four-roller fabric cutting machine, characterized in that, It comprises a cutting knife assembly (1), a position detection assembly (2), a manual adjustment assembly (3) and a servo follow-up assembly (4); The cutting knife assembly (1) comprises a plurality of cutting knives (101) for slitting cloth, and the plurality of cutting knives (101) are arranged at intervals on a cutting knife shaft (102) crossing the cloth (100), so as to cut the cloth (100); The position detection assembly (2) is installed on the cutting knife shaft (102) and can abut against the edge of the cloth (100) to detect the transverse movement of the cloth (100); The manual adjustment assembly (3) is located on one side of the position detection assembly (2) and drives the position detection assembly (2) to move transversely along the cutting knife shaft (102) by a manual mode to realize coarse adjustment; The servo follow-up assembly (4) is located on one side of the position detection assembly (2) and drives the position detection assembly (2) to move transversely along the cutting knife shaft (102) by a servo mode to realize follow-up adjustment.

2. A cutting follow-up device for a four-roller cutting apparatus according to claim 1, wherein The position detection assembly (2) comprises a detection bracket (201), a spring rod (202) is installed on the detection bracket (201) in a horizontal direction, and a push plate assembly (203) is slidably connected to the spring rod (202); A spring set (204) is installed on the spring rod (202) in a sleeved manner, and under the action of the spring set (204), the push plate assembly (203) floats along the length direction of the spring rod (202).

3. A cutting follow-up device for a four-high cutting apparatus according to claim 2, wherein The push plate assembly (203) comprises a push plate bracket (2031) and a double-clamping push plate (2032), the push plate bracket (2031) is slidably installed on the spring rod (202) through a shaft sleeve, and the double-clamping push plate (2032) comprises an upper push plate and a lower push plate symmetrically arranged upward and downward, a gap with a suitable cloth thickness is reserved between the upper push plate and the lower push plate, and the upper push plate and the lower push plate are attached to the edge of the cloth (100) by an upper and lower clamping mode.

4. The cutting follow-up device of a four-roller cutting apparatus according to claim 2, wherein The spring set (204) comprises a left spring (2041) and a right spring (2042), the left spring (2041) and the right spring (2042) are respectively located on two sides of the push plate assembly (203), and the preset elastic force of the right spring (2042) is greater than the elastic force of the left spring (2041), so that under the condition of no external force intervention, the push plate assembly (203) always maintains an initial fitting pressure and stably abuts against the edge of the cloth (100) by the difference in elastic force, thereby ensuring the continuity of offset detection.

5. The cutting follow-up device of a four-roller cutting apparatus according to claim 2, wherein The position detection assembly (2) further comprises a sliding shaft sleeve (205) which is slidably connected with the cutting knife shaft (102); The manual adjustment assembly (3) comprises a first lead screw (301) and a first lead screw nut (302) matched with the first lead screw (301); the first lead screw nut (302) is connected with the sliding shaft sleeve (205) through a connecting rod; The first screw rod (301) is provided with a first adjusting handle (303) at the end. By rotating the first adjusting handle (303) manually, the first screw rod nut (302) drives the position detection assembly (2) to slide along the cutter shaft (102).

6. A cutting follow-up device for a four-high cutting apparatus according to claim 2, wherein The servo follow-up assembly (4) comprises a servo motor (401), a second screw rod (402), and a second screw rod nut (403) matched with the second screw rod (402). The second screw rod nut (403) is movably connected with the cutter shaft (102) through a sliding bracket (404) and a linear bearing (405). Under the action of the servo motor (401), the second screw rod nut (403) drives the cutter shaft (102) and the cutter (101) on the cutter shaft (102) to move laterally.

7. A cutting follow-up device for a four-high cutting apparatus according to claim 6, wherein The position detection assembly (2) further comprises a pull rope sensor (206), and the movable end of the pull rope of the pull rope sensor (206) is connected with the push plate assembly (203). The pull rope sensor (206) is electrically connected with the control system of the servo motor (401). When the push plate assembly (203) follows the lateral floating displacement of the cloth (100), the pull rope sensor (206) collects displacement data in real time and converts it into an electrical signal to be transmitted to the control system. The control system drives the servo motor (401) to operate, so that the lateral displacement of the cutter (101) is synchronized with the offset of the cloth (100), and precise follow-up compensation is realized.

8. The cutting follow-up device of a four-high cutting apparatus according to claim 6, wherein The cutter (101) comprises a blade and a seat, and the blade is detachably installed on the cutter shaft (102) through the seat. The cutter shaft (102) is provided with a second adjusting handle (103) at the end. By rotating the second adjusting handle (103) manually, the cutter shaft (102) and the cutter (101) on the cutter shaft (102) are driven to rotate around the linear bearing (405), and the angle of the cutter (101) is adjusted.

9. A cutting follow-up device for a four-high cutting apparatus according to claim 8, wherein The cutter shaft (102) is further provided with a linear guide rail (104) on the outside. The linear guide rail (104) is connected with the sliding bracket (404) at the position of the linear bearing (405), thereby guiding the cutter shaft (102) and the cutter (101) on the cutter shaft (102) to move laterally.

10. A method of using a cutting follow-up device of a four-roller cutting apparatus, characterized by, The method comprises the following steps: Step A: manual coarse adjustment calibration after starting, to complete the initial alignment of the equipment Step A1: according to the material, thickness, and cutting process requirements of the cloth to be cut, manually rotate the second adjusting handle (103) to drive the cutter shaft (102) to rotate relative to the linear bearing (405), adjust the cutting angle of the cutter (101), and then lock the positioning structure to fix the cutting angle of the cutter; Step A2: manually rotate the first adjusting handle (303) to drive the first screw rod (301) to rotate, and then drive the entire position detection assembly (2) to slide along the cutter shaft (102) through the linkage of the first screw rod nut (302) and the sliding shaft sleeve (205), so that the upper and lower clamping plates of the double-clamping push plate (2032) are accurately fitted and clamped around the edge of the cloth. Step A3: Use the difference in the elastic force of the left spring (2041) and the right spring (2042) to keep the push plate assembly (2032) stable and pre-tighten the pressure to fit the edge of the cloth. After confirming that the cutter cutting reference and push plate detection position are correct, lock all manual adjustment structures to complete the initial rough adjustment calibration of the start-up. Step B: The equipment automatically runs to realize cloth follow-up cutting compensation Step B1: Start the four-roll cloth cutting equipment and the control system of the follow-up device. The cloth is uniformly transported and travels. The pull rope sensor (206) collects the lateral position displacement signal of the push plate assembly (203) in real time and continuously transmits the detection electric signal to the control system. Step B2: When the cloth occurs lateral deviation to one side of the push plate assembly (203), the cloth edge pushes the double-clamped push plate (2032) to slide and compress the corresponding spring. The push plate assembly (203) generates a same-direction displacement. The pull rope sensor (206) collects the positive deviation data and feeds back to the control system. The control system drives the servo motor (401) to operate. Through the second lead screw (402) and the second lead screw nut (403), the sliding bracket (404) and the cutter shaft (102) are driven to translate in the same direction by the same deviation distance, completing the positive follow-up compensation of the cutter (101). Step B3: When the cloth occurs lateral deviation to the other side of the push plate assembly (203), the compressed spring resets and relies on the difference in the elastic force of the two springs to push the push plate assembly (203) to slide in the opposite direction with the cloth edge. The pull rope sensor (206) synchronously collects the reverse displacement signal. The control system drives the servo motor (401) to operate in the opposite direction to drive the cutter (101) to synchronously compensate for the reverse displacement. The whole process ensures that the cutter is always aligned with the cloth cutting reference to realize continuous and precise automatic follow-up cutting operation.

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