A kind of self-adaptive gap technical reformation device of a cold rolling mill trimming cutter

Abstract

The application discloses a kind of cold rolling mill trimming cutter self-adaptive gap technical reformation device, it is related to the technical field of metal mechanical processing equipment, it includes left cutter seat module, right cutter seat module, alignment sensor module and controller, left cutter seat module and right cutter seat module are all included cutter seat body, movable seat, cutter shaft, trimming blade, axial drive unit and radial fine adjustment unit.Alignment sensor module detects the axial spacing and radial deviation of two trimming blades, and the controller controls axial drive unit and radial fine adjustment unit to work according to the detection result, realizes the automatic closed-loop adjustment of the relative position of two trimming blades.The application realizes the self-adaptive precision control of trimming cutter gap by the double-degree-of-freedom collaborative adjustment of axial drive unit and radial fine adjustment unit, in combination with the real-time detection feedback of alignment sensor module, effectively improves trimming precision and strip quality.

Description

Technical Field

[0001] This application relates to the technical field of metal machining equipment, and in particular to a technical modification device for adaptive clearance of trimming knife in cold rolling mill. Background Technology

[0002] During the rolling process of metal strip, cold rolling mills typically require trimming blades on both sides of the strip to remove irregular portions of the strip's edges, ensuring the width accuracy and edge quality of the finished strip. The working gap and relative position of the trimming blades directly affect the trimming quality and the strip yield.

[0003] In the prior art, the trimming knife device of the cold rolling mill mainly includes a knife holder body fixedly installed on the frame, a knife shaft rotatably installed on the knife holder body, and trimming blades installed at the end of the knife shaft. The knife holder body is generally positioned by manually locking with bolts. In use, the worker usually manually adjusts the position of the knife holder body on the frame to set the gap between the two blades.

[0004] However, this traditional trimming blade adjustment method has significant drawbacks: Firstly, the axial clearance adjustment precision of the trimming blades is insufficient. Relying solely on manual experience for coarse adjustments cannot achieve high-precision axial clearance settings. For cold-rolled strips, especially thin strips, where high precision in trimming clearance is required, excessive clearance deviation can lead to problems such as trimming burrs and edge tearing, affecting the surface quality and subsequent processing performance of the finished strip. Secondly, the radial alignment deviation of the trimming blades cannot be effectively compensated. Due to factors such as frame deformation, roll wear, and strip misalignment during cold rolling mill operation, the radial relative positions of the left and right trimming blades will shift. Traditional blade holder structures cannot actively compensate for this deviation, resulting in decreased alignment precision between the trimming blades and the strip edge, thus affecting trimming quality. Furthermore, the setting of the trimming blade gap lacks closed-loop detection and adaptive adjustment capabilities. After the initial blade adjustment, the blade gap and position are fixed, making it impossible to detect and automatically compensate for gap changes caused by factors such as blade wear, thermal deformation, and vibration during the trimming process. Operators can only manually readjust the gap after stopping the machine, which not only increases downtime and labor intensity but also makes the trimming quality uncontrollable during the interval between two blade adjustments, making it difficult to ensure the constancy of the trimming width and the consistency of the edge quality. Summary of the Invention

[0005] To address the problems existing in the prior art, this application provides a technical modification device for adaptive clearance of trimming blades in cold rolling mills.

[0006] This application provides a technical solution for an adaptive clearance modification device for a cold rolling mill trimming knife, which adopts the following technical solution: An adaptive clearance modification device for trimming knives in a cold rolling mill is disclosed, for installation on a cold rolling mill stand. It includes a left knife holder module, a right knife holder module, an alignment sensor module, and a controller. Both the left and right knife holder modules include: a knife holder body slidably mounted on the cold rolling mill stand; a movable seat movably mounted on the knife holder body; a knife shaft rotatably mounted on the movable seat, with a motor mounted on the movable seat to drive the knife shaft; a trimming blade fixedly mounted at the end of the knife shaft; and an axial drive unit for driving the knife holder body to slide along the axial direction of the knife shaft. A radial fine-tuning unit, disposed on the tool holder body, is used to drive the movable seat to move radially along the tool axis; the alignment sensor module is used to detect the axial distance and radial deviation of the two trimming blades on the left and right tool holder modules; the controller is electrically connected to the axial drive unit and the radial fine-tuning unit on the alignment sensor module, the left tool holder module, and the right tool holder module, respectively, and controls the axial drive unit and the radial fine-tuning unit to work according to the detection results output by the alignment sensor module, so as to adjust the relative position of the two trimming blades.

[0007] Optionally, the axial drive unit includes: a mounting base plate connected to the tool holder body; a linear guide rail fixedly mounted on the cold rolling mill frame, with the mounting base plate slidably mounted on the linear guide rail; a ball screw rotatably mounted on the cold rolling mill frame, with the axial direction of the ball screw parallel to the length direction of the linear guide rail, and the mounting base plate threaded onto the ball screw; and a servo motor electrically connected to the controller for driving the ball screw to rotate.

[0008] Optionally, an elastic buffer module is provided between the mounting base plate and the tool holder body, the elastic buffer module being used to apply an elastic buffering force to the tool holder body.

[0009] Optionally, the elastic buffer module includes: a floating connecting seat, fixedly connected to the mounting base plate, the floating connecting seat having an internal receiving cavity; two sets of disc springs, both disposed within the receiving cavity; a spring pressure plate, disposed within the receiving cavity and located between the two sets of disc springs; and a connecting rod, one end of which is fixedly connected to the spring pressure plate and the other end of which is fixedly connected to the tool holder body.

[0010] Optionally, a first adjusting plate and a second adjusting plate are slidably disposed within the receiving cavity. The first adjusting plate and the second adjusting plate are respectively disposed on the side away from each other of the two sets of disc springs. The floating connecting seat is provided with a driving structure for driving the first adjusting plate and the second adjusting plate to slide.

[0011] Optionally, the drive structure includes a bidirectional adjusting screw, which is rotatably mounted on the floating connecting seat and passes through the receiving cavity; a first threaded sleeve is fixedly mounted on the first adjusting plate, and a second threaded sleeve is fixedly mounted on the second adjusting plate; the first threaded sleeve and the second threaded sleeve are respectively sleeved on both sides of the bidirectional adjusting screw and are threadedly engaged with the bidirectional adjusting screw.

[0012] Optionally, a plurality of bidirectional hydraulic dampers are also fixedly installed on the mounting base plate. Each of the bidirectional hydraulic dampers is distributed circumferentially along the floating connecting seat, and the piston rod of the bidirectional hydraulic damper is hinged to the tool holder body to suppress the oscillation of the tool holder body.

[0013] Optionally, the radial fine-tuning unit includes: a positioning disk, fixedly mounted on the tool holder body; multiple guide sliders, evenly spaced along the circumference of the positioning disk, and the guide sliders slidably mounted on the positioning disk along the axial direction of the positioning disk; multiple micro-displacement actuators, each corresponding to one of the guide sliders, for driving the corresponding guide sliders to slide, each micro-displacement actuator being electrically connected to a controller; multiple guide grooves are provided on the movable seat, each guide groove corresponding to one of the guide sliders, and the width of the guide groove is greater than the width of the guide slider; a guide slope is provided on the guide slider, and a guide slope that cooperates with the guide slope is provided in the guide groove.

[0014] Optionally, guide rails are provided on both sides of the guide slope along the slope direction of the guide slope, and a retainer is slidably provided between the two guide rails. Multiple rollers are rotatably provided on the retainer, and each roller is respectively tumbledly connected to the guide slope and the guide slope.

[0015] Optionally, the tool holder body is provided with a plurality of elastic reset members along the circumference of the movable seat to provide elastic reset force to the movable seat.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. This application achieves dual-degree-of-freedom adaptive precision adjustment of the trimming blade gap by setting up a positioning sensor module to detect the axial distance and radial deviation of the two trimming blades in real time, and by cooperating with the controller to control the axial drive unit and the radial fine adjustment unit in a closed loop. The axial drive unit controls the slide of the blade holder body along the blade axis to adjust the axial distance, and the radial fine adjustment unit drives the movable seat to move radially along the blade axis to compensate for the radial deviation. This ensures that the relative position between the trimming blades is always within the set range, effectively avoiding trimming burrs and edge tearing problems caused by gap deviation, and significantly improving trimming accuracy and strip yield.

[0017] 2. This application provides elastic buffering force to the tool holder body by setting an elastic buffer module between the mounting base plate and the tool holder body, utilizing the elastic compression deformation of the disc spring assembly. When the trimming blade is subjected to impact load from the edge of the strip during the trimming process, the disc spring assembly can absorb the impact energy, causing the tool holder body to produce a slight floating displacement, thereby buffering the impact force during the trimming process, reducing the risk of blade chipping and excessive wear, and extending the service life of the trimming blade; 3. This application, by setting a first adjusting plate and a second adjusting plate within the receiving cavity of the elastic buffer module, and cooperating with a bidirectional adjusting screw and a threaded sleeve to drive the two adjusting plates to slide towards or away from each other, can precisely adjust the pre-compression of the two sets of disc springs. By rotating the bidirectional adjusting screw, the first adjusting plate and the second adjusting plate apply pre-tightening force to the two sets of disc springs respectively, thereby achieving stepless adjustment of the stiffness of the elastic buffer module to adapt to the differentiated requirements of cutting pressure for different specifications of strip and different trimming processes.

[0018] 4. This application effectively suppresses the oscillation of the tool holder body caused by periodic impacts during the trimming process by setting multiple bidirectional hydraulic dampers distributed circumferentially along the floating connecting seat on the mounting base plate and hinged the piston rod of each damper to the tool holder body. The bidirectional hydraulic dampers provide bidirectional damping force when the tool holder body reciprocates, and together with the disc spring assembly, they form an elastic damping vibration reduction system to ensure the stability of the trimming tool gap during the dynamic trimming process and avoid gap fluctuations and trimming quality deterioration caused by vibration.

[0019] 5. This application utilizes a radial fine-tuning unit with inclined plane fitting. Multiple circumferentially spaced guide sliders engage with the inclined guide surfaces within the guide groove of the movable seat to achieve micro-displacement adjustment of the movable seat in the radial direction. The micro-displacement actuator independently drives each guide slider to slide along the axial direction of the positioning disk. The guiding inclined surfaces on the guide sliders generate a normal component force along the inclined guide surfaces within the guide groove, driving the movable seat to produce precise micro-displacement in the radial direction. The coordinated action of multiple guide sliders not only achieves high-precision adjustment of the radial clearance but also compensates for radial runout deviation of the movable seat, ensuring the radial alignment accuracy of the trimming blade.

[0020] 6. This application converts the sliding friction between the guide slider and the guide groove into rolling friction by setting guide rails and retainers with rollers on both sides of the guide slope. Each roller is rolledly connected to the guide slope and the guide slide slope, which reduces the motion resistance during radial adjustment, improves the accuracy and response speed of micro-displacement adjustment, and reduces wear on the mating surfaces, ensuring that the radial fine-tuning unit maintains high precision during long-term use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2This is a cross-sectional view of the tool holder body used in the embodiments of this application; Figure 3 This is a schematic diagram illustrating the structure of the axial drive unit according to an embodiment of this application; Figure 4 This is a schematic diagram illustrating the structure of the movable seat according to an embodiment of this application; Figure 5 yes Figure 4 An enlarged view of section A.

[0022] Explanation of reference numerals in the attached drawings: 100, cold rolling mill frame; 200, left cutter holder module; 300, right cutter holder module; 400, alignment sensor module; 401, laser displacement sensor; 402, laser correction sensor; 500, controller; 1, cutter holder body; 11, cavity; 12, connecting rod assembly; 13, elastic reset component; 14, motor; 2, movable seat; 21, guide groove; 22, guide rail; 23, cage; 24, roller; 3, cutter shaft; 4, repair... 5. Side blade; 6. Axial drive unit; 7. Mounting base plate; 8. Linear guide rail; 9. Ball screw; 10. Servo motor; 11. Radial fine adjustment unit; 12. Positioning plate; 23. Guide slider; 34. Micro-displacement driver; 15. Elastic buffer module; 26. Floating connecting seat; 37. Disc spring assembly; 48. Spring pressure plate; 59. Connecting support rod; 60. First adjusting plate; 71. Second adjusting plate; 72. Bidirectional adjusting screw; 73. Bidirectional hydraulic damper. Detailed Implementation

[0023] The following will be combined with the appendix Figure 1 -Appendix Figure 5 The technical solutions in the embodiments of the present invention are clearly and completely described herein. The described embodiments are only possible technical implementations of the present invention and not all possible implementations. Those skilled in the art can obtain other embodiments in conjunction with the embodiments of the present invention without creative effort, and these embodiments are also within the protection scope of the present invention.

[0024] This application mainly adopts multi-module collaborative control to realize adaptive adjustment of the trimming blade gap, thereby improving trimming accuracy and strip yield, and reducing trimming cost. The following is a further detailed description of this application.

[0025] This application discloses an adaptive clearance modification device for trimming knives in a cold rolling mill, which can be installed online on an existing cold rolling mill. (Refer to...) Figure 1 and Figure 2The technical upgrade device is installed on the cold rolling mill stand 100 and includes a left cutter holder module 200, a right cutter holder module 300, an alignment sensor module 400, and a controller 500. The left cutter holder module 200 and the right cutter holder module 300 are slidably disposed on both sides of the cold rolling mill stand 100, and the alignment sensor module 400 and the controller 500 are mounted on the cold rolling mill stand 100. The left cutter holder module 200 and the right cutter holder module 300 have symmetrical structures and each includes a cutter holder body 1, a movable seat 2, a cutter shaft 3, a trimming blade 4, an axial drive unit 5, and a radial fine adjustment unit 6. The cutter holder body 1 is horizontally slidably disposed on the cold rolling mill stand 100, the movable seat 2 is movably disposed on the cutter holder body 1, the cutter shaft 3 is rotatably disposed on the movable seat 2, and the trimming blade 4 is fixedly disposed on the end of the cutter shaft 3. The axial drive unit 5 drives the tool holder body 1 to slide along the axial direction of the tool shaft 3. The radial fine adjustment unit 6 is mounted on the tool holder body 1 and drives the movable seat 2 to move radially along the tool shaft 3. The alignment sensor module 400 detects the axial distance and radial deviation of the two trimming blades 4 on the left tool holder module 200 and the right tool holder module 300. The controller 500 is electrically connected to the axial drive unit 5 and the radial fine adjustment unit 6 on the alignment sensor module 400, the left tool holder module 200, and the right tool holder module 300, respectively. Based on the detection results output by the alignment sensor module 400, the controller controls the axial drive unit 5 and the radial fine adjustment unit 6 to adjust the relative position of the two trimming blades 4. Through the dual-degree-of-freedom coordinated adjustment of the axial drive unit 5 and the radial fine adjustment unit 6, combined with the real-time detection feedback of the alignment sensor module 400, the dual-degree-of-freedom adaptive precision adjustment of the trimming blade gap is realized, effectively avoiding trimming burrs and edge tearing problems caused by gap deviation, and improving trimming accuracy and strip yield.

[0026] Reference Figure 1 The alignment sensor module 400 can employ a laser displacement sensor 401 and a laser correction sensor 402. A set of alignment sensor modules 400 is installed on the movable seats 2 of the left tool holder module 200 and the right tool holder module 300, respectively, for real-time detection of the axial distance and radial deviation between the two trimming blades 4. The controller 500 can be a PLC controller 500 or an industrial computer, internally preset with a standard setting value for the trimming blade gap. After receiving the detection signal output from the alignment sensor module 400, it calculates the adjustment amount of the axial drive unit 5 and the radial fine-tuning unit 6 through a PID control algorithm, realizing closed-loop adaptive adjustment of the axial distance and radial deviation of the two trimming blades 4.

[0027] Reference Figure 2Specifically, the tool holder body 1 is typically made of high-strength metal materials, such as alloy steel, which possesses good rigidity and stability. The movable seat 2 is generally made of lightweight and high-strength materials such as aluminum alloy. A cavity 11, with two through-holes, is provided in the middle of the tool holder body 1, and the movable seat 2 is movably disposed within the cavity 11. Multiple sets of connecting rod assemblies 12 are provided between the movable seat 2 and the tool holder body 1, with each set of connecting rod assemblies 12 distributed circumferentially along the movable seat 2. Each connecting rod assembly 12 includes a first connecting rod and a second connecting rod hinged to each other. The first connecting rod is hinged to the movable seat 2, and the second connecting rod is hinged to the side wall of the cavity 11. Furthermore, each hinge axis on the first connecting rod and each hinge axis on the second connecting rod are parallel to the axial direction of the tool shaft 3. Through the arrangement of each set of connecting rod assemblies 12, the movement of the movable seat 2 along the axial direction of the tool shaft 3 on the tool holder body 1 can be restricted, while simultaneously allowing the movable seat 2 to move freely radially along the tool shaft 3 on the tool holder body 1.

[0028] Reference Figure 2 Multiple elastic reset members 13 are evenly distributed along the circumference of the movable seat 2 within the cavity 11 of the tool holder body 1, providing elastic reset force to the movable seat 2. The elastic reset members 13 can be compression springs or disc springs, with one end fixedly connected to the side wall of the cavity 11 of the tool holder body 1 and the other end fixedly connected to the side wall of the movable seat 2. The function of the elastic reset members 13 is to provide elastic reset force to the movable seat 2 when the radial fine-tuning unit 6 is adjusted in the reverse direction, enabling the movable seat 2 to return smoothly and evenly along the radial direction.

[0029] Reference Figure 2 The cutter shaft 3 is made of high-quality bearing steel, ensuring sufficient strength and wear resistance. The cutter shaft 3 is rotatably mounted on the movable seat 2 via bearings, which can be deep groove ball bearings or tapered roller bearings, providing stable support and low-friction rotational performance. An electric motor 14, which can be a geared motor or a stepper motor, is mounted on the movable seat 2. It is connected to the cutter shaft 3 via a coupling, providing power for the rotation of the cutter shaft 3. The trimming blade 4 is typically made of cemented carbide, possessing high hardness and wear resistance. It is fixedly mounted on the end of the cutter shaft 3 by a clamping device, which can be a triangular chuck or a hydraulic caliper, ensuring the stability of the trimming blade 4 during high-speed rotation.

[0030] Reference Figure 3The axial drive unit 5 includes a mounting base plate 51, a linear guide rail 52, a ball screw 53, and a servo motor 54. The mounting base plate 51 is generally welded from steel plates, possessing sufficient strength and rigidity, and the tool holder body 1 is mounted on the mounting base plate 51. The linear guide rail 52 is horizontally fixed on the cold rolling mill frame 100, and the mounting base plate 51 is slidably mounted on the linear guide rail 52 via a slider. The high precision of the fit between the slider and the linear guide rail 52 ensures the smooth sliding of the mounting base plate 51. The ball screw 53 is rotatably mounted on the cold rolling mill frame 100, its axis parallel to the length direction of the linear guide rail 52, and the mounting base plate 51 is threaded onto the ball screw 53. The servo motor 54 is electrically connected to the controller 500 and is used to drive the ball screw 53 to rotate. When the controller 500 issues a command, the servo motor 54 drives the ball screw 53 to rotate, thereby causing the mounting base plate 51 to slide along the linear guide rail 52. This, in turn, drives the tool holder body 1 to produce precise axial displacement along the axis of the tool shaft 3, achieving precise adjustment of the axial distance between the two trimming blades 4. The ball screw 53 can also be replaced by a trapezoidal screw, but the ball screw 53 has higher transmission efficiency and better precision.

[0031] Reference Figure 2 and Figure 3 An elastic buffer module 7 is provided between the mounting base plate 51 and the tool holder body 1. The elastic buffer module 7 is used to apply elastic buffering force to the tool holder body 1. Specifically, the elastic buffer module 7 includes a floating connecting seat 71, two sets of disc springs 72, a spring pressure plate 73, and connecting rods 74. The floating connecting seat 71 is fixedly connected to the mounting base plate 51, and the floating connecting seat 71 has a receiving cavity inside. Both sets of disc springs 72 are disposed in the receiving cavity, and the spring pressure plate 73 is disposed in the receiving cavity and located between the two sets of disc springs 72. Multiple connecting rods 74 are provided, one end of the connecting rod 74 is fixedly connected to the spring pressure plate 73, and the other end is fixedly connected to the tool holder body 1. The two sets of disc springs 72 can be made of disc springs of the same specification stacked together, and the spring pressure plate 73 divides the two sets of disc springs 72 into two symmetrical sets within the receiving cavity. When the trimming blade 4 is subjected to an impact load from the edge of the strip, the blade holder body 1 pushes the spring pressure plate 73 through the connecting support rod 74 to compress the disc spring group 72 on one side, while the disc spring group 72 on the other side releases the elastic restoring force, causing the blade holder body 1 to produce a slight floating displacement, thereby absorbing the impact energy, buffering the impact force during the trimming process, and reducing the risk of blade chipping.

[0032] Reference Figure 2The cavity also contains a first adjusting plate 75 and a second adjusting plate 76, which are slidably disposed within it. The first adjusting plate 75 and the second adjusting plate 76 are respectively positioned on opposite sides of the two sets of disc spring assemblies 72. The floating connecting seat 71 is equipped with a driving structure for sliding the first adjusting plate 75 and the second adjusting plate 76. The first adjusting plate 75 and the second adjusting plate 76 can be rectangular plates, slidably disposed along the axial direction of the cavity, and respectively abutting against the outer end faces of the two sets of disc spring assemblies 72.

[0033] Reference Figure 2 Specifically, the drive structure includes a bidirectional adjusting screw 77. The bidirectional adjusting screw 77 is rotatably mounted on the floating connecting seat 71 and passes through the receiving cavity. A first threaded sleeve is fixedly mounted on the first adjusting plate 75, and a second threaded sleeve is fixedly mounted on the second adjusting plate 76. The first and second threaded sleeves are respectively fitted onto both sides of the bidirectional adjusting screw 77 and are threadedly engaged with it. The two ends of the bidirectional adjusting screw 77 can be respectively provided with external threads of opposite directions, which engage with the internal threads of the first and second threaded sleeves. When the bidirectional adjusting screw 77 is rotated, the first and second threaded sleeves slide synchronously in opposite directions, driving the first adjusting plate 75 and the second adjusting plate 76 to move towards or away from each other, thereby precisely adjusting the pre-compression of the two sets of disc springs 72 and achieving stepless adjustment of the stiffness of the elastic buffer module 7.

[0034] Reference Figure 2 and Figure 3 Multiple bidirectional hydraulic dampers 78 are also fixedly installed on the mounting base plate 51. Each bidirectional hydraulic damper 78 is distributed circumferentially along the floating connecting seat 71, and the piston rod of each bidirectional hydraulic damper 78 is hinged to the tool holder body 1 to suppress the oscillation of the tool holder body 1. The bidirectional hydraulic dampers 78 can adopt a double-acting hydraulic cylinder damper structure, with both ends of the piston rod hinged to the floating connecting seat 71 and the tool holder body 1, respectively. The multiple bidirectional hydraulic dampers 78 are evenly distributed circumferentially, providing bidirectional damping force during the reciprocating motion of the tool holder body 1. Together with the disc spring assembly 72, they form an elastic damping vibration reduction system, effectively suppressing the oscillation of the tool holder body 1 caused by periodic impacts during the trimming process, ensuring the dynamic stability of the trimming tool gap.

[0035] Reference Figure 2 and Figure 3The radial fine-tuning unit 6 includes a positioning disk 61, multiple guide sliders 62, and multiple micro-displacement actuators 63. The positioning disk 61 is fixedly mounted on the tool holder body 1, and the axial direction of the positioning disk 61 is parallel to the axial direction of the tool shaft 3. The multiple guide sliders 62 are evenly distributed around the circumference of the positioning disk 61, and the guide sliders 62 are slidably mounted on the positioning disk 61 along the axial direction of the positioning disk 61. Multiple micro-displacement actuators 63 are provided, each corresponding to one of the guide sliders 62, and are used to drive the corresponding guide slider 62 to slide. Each micro-displacement actuator 63 is electrically connected to the controller 500. The micro-displacement actuators 63 can be one of an electric push rod, a piezoelectric ceramic actuator, or a servo electric cylinder. The controller 500 independently controls the displacement of each micro-displacement actuator 63 based on the radial deviation signal detected by the alignment sensor module 400.

[0036] Reference Figure 2 and Figure 4 Specifically, the movable seat 2 is provided with multiple guide grooves 21, each corresponding to a guide slider 62, and the width of the guide groove 21 is greater than the width of the guide slider 62. The guide slider 62 is provided with a guide ramp, and the guide groove 21 contains a guide ramp that mates with the guide ramp. The width of the guide groove 21, being greater than the width of the guide slider 62, provides displacement space for the guide slider 62 to slide along the radially outer direction of the guide groove 21. When the micro-displacement actuator 63 drives the guide slider 62 to slide along the axis of the positioning disk 61, the guide ramp on the guide slider 62 slides along the guide ramp within the guide groove 21. The guide ramp exerts a normal force on the guide ramp, causing the movable seat 2 to produce a micro-displacement radially. The coordinated action of multiple guide sliders 62 not only achieves high-precision adjustment of the radial clearance but also compensates for the radial runout deviation of the movable seat 2 through the differential displacement of each guide slider 62, ensuring the radial alignment accuracy of the trimming blade 4.

[0037] Reference Figure 4 and Figure 5 Guide rails 22 are provided on both sides of the guide slope along its slope direction. A retainer 23 is slidably mounted between the two guide rails 22, and multiple rollers 24 are rotatably mounted on the retainer 23. Each roller 24 is rotatably connected to the guide slope and the guide slide slope, respectively. The guide rails 22 can be T-shaped or dovetail-shaped. The retainer 23 is slidably mounted between the two guide rails 22, and the two ends of the rollers 24 are rotatably supported on the retainer 23. When the guide slider 62 slides along the axial direction of the positioning disk 61, the guide slope generates radial thrust along the guide slide slope. The guide slope and the guide slide slope respectively roll into contact with the circumferential surface of the rollers 24, converting sliding friction into rolling friction, reducing motion resistance during radial adjustment, improving the accuracy and response speed of micro-displacement adjustment, and reducing wear on the mating surfaces.

[0038] The implementation principle of the adaptive clearance modification device for trimming blades in this application embodiment is as follows: When using this device, the target axial distance and radial alignment reference value between the trimming blades 4 are first set by the controller 500. The alignment sensor module 400 detects the actual axial distance and radial deviation signal of the two trimming blades 4 in real time and transmits it to the controller 500. When the alignment sensor module 400 detects that the axial distance deviates from the set value, the controller 500 outputs a control signal to drive the servo motor 54 to rotate. The servo motor 54 drives the ball screw 53 to rotate. The ball screw 53 drives the mounting base plate 51 to slide along the linear guide rail 52, thereby pushing the blade holder body 1 to generate a precise axial displacement along the axis of the blade shaft 3, so that the axial distance between the two trimming blades 4 returns to the set value. When the alignment sensor module 400 detects a radial deviation, the controller 500 calculates the adjustment amount of each micro-displacement actuator 63 based on the deviation, and drives the corresponding guide slider 62 to slide along the axis of the positioning disk 61. The guide inclined surface on the guide slider 62 rolls along the guide inclined surface in the guide groove 21, causing the movable seat 2 to generate a precise micro-displacement in the radial direction, thereby compensating for the radial deviation of the trimming blade 4. When the trimming blade 4 is subjected to an impact load from the edge of the strip, the blade holder body 1 pushes the spring pressure plate 73 to compress the disc spring group 72 through the connecting support rod 74. At the same time, the bidirectional hydraulic damper 78 provides damping force to suppress the oscillation of the blade holder body 1, causing the blade holder body 1 to generate a slight floating displacement to absorb the impact energy, thereby ensuring the stability of the trimming blade gap during the dynamic trimming process. This device achieves adaptive precision control of the trimming blade gap through the dual-degree-of-freedom coordinated adjustment of the axial drive unit 5 and the radial fine adjustment unit 6, combined with the real-time closed-loop detection of the alignment sensor module 400, effectively improving the trimming accuracy and strip yield.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cold rolling mill trimming knife adaptive clearance modification device, used for installation on the cold rolling mill stand (100), characterized in that, It includes a left tool holder module (200), a right tool holder module (300), an alignment sensor module (400), and a controller (500); Both the left tool holder module (200) and the right tool holder module (300) include: The cutter holder body (1) is slidably mounted on the cold rolling mill frame (100); Movable seat (2), which is movably mounted on the tool holder body (1); The cutter shaft (3) is rotatably mounted on the movable seat (2), and the movable seat (2) is provided with an electric motor (14) for driving the cutter shaft (3) to rotate; The trimming blade (4) is fixedly installed at the end of the cutter shaft (3); An axial drive unit (5) is used to drive the tool holder body (1) to slide along the axial direction of the tool shaft (3); A radial fine adjustment unit (6) is disposed on the tool holder body (1) and is used to drive the movable seat (2) to move radially along the tool shaft (3); The alignment sensor module (400) is used to detect the axial distance and radial deviation of the two trimming blades (4) on the left blade holder module (200) and the right blade holder module (300); The controller (500) is electrically connected to the axial drive unit (5) and the radial fine adjustment unit (6) on the alignment sensor module (400), the left tool holder module (200), and the right tool holder module (300), respectively. It controls the axial drive unit (5) and the radial fine adjustment unit (6) to work according to the detection results output by the alignment sensor module (400) in order to adjust the relative position of the two trimming blades (4).

2. The adaptive clearance modification device for a cold rolling mill trimming knife according to claim 1, characterized in that, The axial drive unit (5) includes: The mounting base plate (51) is connected to the tool holder body (1); A linear guide rail (52) is fixedly mounted on the cold rolling mill frame (100), and the mounting base plate (51) is slidably mounted on the linear guide rail (52). A ball screw (53) is rotatably mounted on the cold rolling mill frame (100), and the axial direction of the ball screw (53) is parallel to the length direction of the linear guide (52). The mounting base plate (51) is threaded onto the ball screw (53). A servo motor (54), electrically connected to the controller (500), is used to drive the ball screw (53) to rotate.

3. The adaptive clearance modification device for a cold rolling mill trimming knife according to claim 2, characterized in that, An elastic buffer module (7) is provided between the mounting base plate (51) and the tool holder body (1), and the elastic buffer module (7) is used to apply an elastic buffer force to the tool holder body (1).

4. The adaptive clearance modification device for a cold rolling mill trimming knife according to claim 3, characterized in that, The elastic buffer module (7) includes: A floating connecting seat (71) is fixedly connected to the mounting base plate (51), and the interior of the floating connecting seat (71) is provided with a receiving cavity; Two sets of disc spring assemblies (72) are both disposed within the receiving cavity; A spring pressure plate (73) is disposed in the receiving cavity and located between the two sets of disc springs (72); A connecting rod (74) is provided, one end of which is fixedly connected to the spring pressure plate (73), and the other end is fixedly connected to the tool holder body (1).

5. The adaptive clearance modification device for a cold rolling mill trimming knife according to claim 4, characterized in that, The cavity is slidably provided with a first adjusting plate (75) and a second adjusting plate (76). The first adjusting plate (75) and the second adjusting plate (76) are respectively located on the side away from each other of the two sets of disc springs (72). The floating connecting seat (71) is provided with a driving structure for driving the first adjusting plate (75) and the second adjusting plate (76) to slide.

6. The adaptive clearance modification device for a cold rolling mill trimming knife according to claim 5, characterized in that, The driving structure includes a bidirectional adjusting screw (77), which is rotatably mounted on the floating connecting seat (71) and passes through the receiving cavity; a first threaded sleeve is fixedly mounted on the first adjusting plate (75), and a second threaded sleeve is fixedly mounted on the second adjusting plate (76). The first threaded sleeve and the second threaded sleeve are respectively sleeved on both sides of the bidirectional adjusting screw (77) and are threadedly engaged with the bidirectional adjusting screw (77).

7. The adaptive clearance modification device for a cold rolling mill trimming knife according to claim 4, characterized in that, Multiple bidirectional hydraulic dampers (78) are also fixedly installed on the mounting base plate (51). Each bidirectional hydraulic damper (78) is distributed circumferentially along the floating connecting seat (71), and the piston rod of the bidirectional hydraulic damper (78) is hinged to the tool holder body (1) to suppress the oscillation of the tool holder body (1).

8. The adaptive clearance modification device for a cold rolling mill trimming knife according to claim 1, characterized in that, The radial fine-tuning unit (6) includes: Positioning plate (61) is fixedly mounted on the tool holder body (1); Multiple guide blocks (62) are evenly distributed along the circumference of the positioning disk (61), and the guide blocks (62) are slidably disposed on the positioning disk (61) along the axial direction of the positioning disk (61); Multiple micro-displacement actuators (63) are provided and correspond one-to-one with the guide sliders (62) to drive the corresponding guide sliders (62) to slide. Each micro-displacement actuator (63) is electrically connected to the controller (500). The movable seat (2) is provided with a plurality of guide grooves (21), each of which corresponds to a guide block (62), and the width of the guide groove (21) is greater than the width of the guide block (62); the guide block (62) is provided with a guide slope, and the guide groove (21) is provided with a guide slope that cooperates with the guide slope.

9. The adaptive clearance modification device for a cold rolling mill trimming knife according to claim 8, characterized in that, Guide rails (22) are provided on both sides of the guide slope along the slope direction of the guide slope. A retainer (23) is slidably provided between the two guide rails (22). Multiple rollers (24) are rotatably provided on the retainer (23). Each roller (24) is slidably connected to the guide slope and the guide slope respectively.

10. The adaptive clearance modification device for a cold rolling mill trimming knife according to claim 8, characterized in that, Multiple elastic reset members (13) are provided on the tool holder body (1) along the circumference of the movable seat (2) to provide elastic reset force to the movable seat (2).

Images