Numerical control cutter device for cutting of rubber

Abstract

The utility model is suitable for the field of rubber material cutting equipment, provides a numerical control cutting knife device for rubber material cutting, including frame, mounting panel, limit stop, scale frame, knife rest centering subassembly, cutting knife adjusting screw rod subassembly, mid cut knife subassembly A, left mobile cutting knife subassembly Ba, left mobile cutting knife subassembly Ca, right mobile cutting knife subassembly Bb, right mobile cutting knife subassembly Cb, servo drive system, swivel arm, branch, air pipe support, linear guide rail one, linear guide rail two, handle and pneumatic system, mounting panel is fixed in frame, and mid cut knife subassembly A is installed in mounting panel through air cylinder and is fixed in left and right positions, and cutting knife subassembly Ba / Bb, Ca / Cb are respectively through the sliding block and the corresponding linear guide rail sliding fit, and are engaged through the ball nut and the positive and negative screw thread ball screw rod driven by servo motor, in the utility model, the initial position positioning of cutting knife is realized through knife rest centering subassembly, can complete single or double rubber material cutting, and the operation is convenient and the maintenance is efficient.

Description

Technical Field

[0001] This utility model belongs to the field of rubber cutting equipment, and in particular relates to a CNC cutting device for rubber cutting. Background Technology

[0002] Traditional rubber cutting devices lack a dedicated blade holder centering component, and the initial position of the cutter needs to be manually calibrated. The calibration process is time-consuming and prone to errors, resulting in a significant amount of time being spent adjusting the cutter reference before each start-up, making it impossible to quickly enter the normal cutting operation state and affecting production efficiency. The existing rubber cutting device does not have an auxiliary adjustment structure consisting of a rotating arm and a support arm. When the servo system on which the cutter movement depends malfunctions, the device must be disassembled to manually adjust the cutter position. The operation process is cumbersome, and the cutter base slider is easily damaged during disassembly and adjustment, which prolongs the equipment maintenance time and increases the equipment downtime cost. Traditional rubber cutting devices lack magnetic switches in their pneumatic systems, making it impossible to provide real-time feedback on the position of the cylinder piston. The position of the cutter needs to be manually observed and judged, which can easily lead to incomplete cutting of the rubber due to the cutter not descending completely, or collision with the conveyed rubber due to the cutter not rising completely, thus increasing the product defect rate. The existing cutting device lacks a damping bearing at the hinge between the rotating arm and the frame, making it prone to wobbling when manually adjusting the rotating arm; the outer surface of the handle lacks an anti-slip structure, making it easy for operators to slip and increasing operator fatigue; at the same time, the markings on the pneumatic components are not standardized, with some only marked in a single language or not marked at all, making it difficult for operators to quickly identify the control circuit and posing a risk of misoperation. Therefore, a CNC cutting device for cutting rubber materials is needed to solve the above problems. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a CNC cutting device for cutting rubber materials, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A CNC cutting device for cutting rubber materials includes a frame, a mounting plate, a limit block, a ruler frame, a tool holder centering assembly, a cutting tool adjusting screw assembly, a center cutting tool assembly A, a left moving cutting tool assembly Ba, a left moving cutting tool assembly Ca, a right moving cutting tool assembly Bb, a right moving cutting tool assembly Cb, a servo drive system, a rotating arm, a support arm, an air pipe support, a linear guide rail one, a linear guide rail two, a handle, and a pneumatic system. The mounting plate is fixed to the frame, and the ruler frame and the tool holder centering assembly are respectively fixed to the mounting plate. The tool holder centering assembly includes a centering screw, a centering screw nut, and a centering bearing seat; One end of the centering bearing housing is fixedly connected to the mounting plate. The centering screw passes through the centering bearing housing. One end of the centering screw extends out of the centering bearing housing and abuts against the base side wall of the left moving cutter assembly Ba or the right moving cutter assembly Bb. The centering screw nut is threadedly connected to the centering screw and fixed to the mounting plate. The center-position cutter assembly A is mounted on the mounting plate via a liftable cylinder. The cylinder pipeline is fixed to the air pipe bracket, which is fixedly connected to the frame. The center-position cutter assembly A is fixed in the left and right positions. The left moving cutter assembly Ba and the right moving cutter assembly Bb are respectively installed on independent bases. A slider is set at the rear of the base. The slider is slidably engaged with a linear guide rail. The linear guide rail is fixedly connected to the frame. A positive and negative threaded ball nut is set at the upper rear of the base. The nut meshes with the positive and negative threaded ball screws on both sides driven by the servo motor B in the cutter adjusting screw assembly. The left moving cutter assembly Ca and the right moving cutter assembly Cb are respectively installed on independent bases. A slider is set at the rear of the base. The slider is slidably engaged with the second linear guide rail. The second linear guide rail is fixedly connected to the frame. A positive and negative threaded ball nut is set at the lower rear of the base. The nut meshes with the positive and negative threaded ball screws on both sides driven by the servo motor C in the cutter adjusting screw assembly. One end of the rotating arm is hinged to the frame and the other end is equipped with a handle. One end of the support arm is fixedly connected to the rotating arm, and the other end of the support arm abuts against the cutter base. The servo drive system is electrically connected to servo motor B, servo motor C, and encoder. The pneumatic system includes a pneumatic box, cylinder, air supply triplet, pressure reducing valve, and solenoid valve; The air source triplet is connected to the factory's compressed air via a hose and is installed inside the pneumatic box on the right side; A pressure reducing valve is installed on the pneumatic box opening and closing door, and a pressure gauge is installed directly above the pressure reducing valve. Three or more solenoid valves with valve seats are installed in the pneumatic box, and the solenoid valves are connected to the cylinder. The mounting plate is provided with four through holes, which are drilled to match the threaded holes on the frame. The pneumatic box is equipped with wiring terminals and has reserved interfaces, and the limit block is fixedly connected to the frame.

[0005] The tool holder centering component enables automatic initial positioning of the cutter with a positioning error of ≤0.05mm, reducing the start-up calibration time to 1-2 minutes; the rotating arm and support arm form an emergency adjustment structure, and manual adjustment in case of servo failure only takes 5 minutes, significantly reducing downtime costs.

[0006] In a further technical solution, the middle cutting blade assembly A, the left moving cutting blade assembly Ba, the left moving cutting blade assembly Ca, the right moving cutting blade assembly Bb, and the right moving cutting blade assembly Cb each correspond to a cylinder. Each cylinder is connected to a solenoid valve through an air pipe. The solenoid valve is connected to a pressure reducing valve through an air pipe. The pressure reducing valve is connected to an air source triple unit through an air pipe. The pressure reducing valve has a Chinese nameplate, and the solenoid valve and air source triplet have an English control air circuit nameplate. When purchasing, the manufacturer should add extra spare parts such as quick-connect couplings and spiral air hoses.

[0007] In a further technical solution, the output shaft of the servo motor B is fixedly connected to the ball screw in the cutter adjusting screw assembly via a coupling. The ball screw has positive and negative threads on both sides, and both ends of the ball screw are supported on the frame by bearing seats. When the ball screw rotates, its outer positive and negative threads drive the ball nuts of the left moving cutter assembly Ba and the right moving cutter assembly Bb to move away from or towards each other synchronously along the screw axis.

[0008] In a further technical solution, the output shaft of the servo motor C is fixedly connected to another ball screw in the cutter adjusting screw assembly via a coupling. The ball screw has positive and negative threads on both sides, and both ends of the ball screw are supported on the frame by bearing seats. When the ball screw rotates, its outer positive and negative threads drive the ball nuts of the left moving cutter assembly Ca and the right moving cutter assembly Cb to move away from or towards each other synchronously along the screw axis.

[0009] In a further technical solution, the pneumatic system also includes a one-way throttle valve and a muffler; one end of the one-way throttle valve is connected to the cylinder air pipe via a threaded quick-connect coupling, and the other end is connected to a solenoid valve; the muffler is connected to the exhaust port of the solenoid valve via a thread; a magnetic switch is also fixed on the air pipe bracket, and the magnetic switch is connected to the servo drive system via a wire, and the magnetic switch is set to correspond to the position of the cylinder piston.

[0010] A further technical solution is that a damping bearing is provided at the hinge joint between the rotating arm and the frame, and an anti-slip rubber sleeve is fitted on the outer surface of the handle; the centering screw, centering screw nut, and centering bearing seat of the tool holder centering assembly are respectively made of suitable metal materials.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model is based on a transmission structure of "servo motor + positive and negative threaded ball screw + linear guide rail". When the servo motor drives the ball screw to rotate, the ball screw and the ball nut of the cutter base are precisely engaged. With the guidance of the linear guide rail, the synchronous movement of the cutter assembly can be realized, solving the problem of asynchronous movement of the cutter in traditional devices. At the same time, the encoder converts the cutting width parameter into the rotation angle of the servo motor, realizing precise control of the cutter movement distance and improving the consistency of the rubber material cutting size. This utility model is based on the positioning and adjustment design of "tool holder centering component + rotating arm-support arm emergency structure". The tool holder centering component achieves precise positioning of the initial position of the cutter through the abutment cooperation between the centering screw and the cutter base, replacing the traditional manual calibration and shortening the start-up preparation time. The emergency structure composed of the rotating arm and support arm can quickly and manually adjust the cutter position in case of servo system failure, avoiding the prolongation of maintenance time due to disassembly of equipment and reducing downtime costs. This utility model is based on a pneumatic control scheme of "standardized pneumatic system + magnetic switch feedback". The unified selection of pneumatic components and standardized air circuit layout improve the stability of air circuit operation and reduce the probability of air circuit failure. The magnetic switch provides real-time feedback on the cylinder piston position to ensure that the cutting blade lifting action is in place, avoiding cutting problems caused by incomplete cutting blade lifting and lowering, and reducing the product defect rate. At the same time, bilingual labels and pressure reducing valve door closing adjustment design improve the ease of operation and reduce the risk of misoperation.

[0012] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention from the front view; Figure 2 This is a partial rear-view three-dimensional structural schematic diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the linear guide rail of this utility model; Figure 4 This is a three-dimensional structural diagram of the frame of this utility model; Figure 5 This is a three-dimensional structural diagram of the tool holder centering component of this utility model; Figure 6 This is a three-dimensional structural diagram of the cutter adjusting screw assembly of this utility model; Figure 7 This is a three-dimensional structural diagram of the right-moving cutter assembly Cb of this utility model; Figure 8 This is a three-dimensional structural diagram of the right-moving cutter assembly Bb of this utility model; Figure 9 This is a three-dimensional structural diagram of the mid-position cutter assembly A of this utility model; Figure 10 This is a three-dimensional structural diagram of the left-moving cutter assembly Ca of this utility model; Figure 11 This is a three-dimensional structural diagram of the left-moving cutter assembly Ba of this utility model; Figure 12 This is a pneumatic principle diagram of the present invention.

[0014] In the diagram: 1. Limiting block; 2. Frame; 3. Mounting plate; 4. Scale frame; 5. Blade holder centering assembly; 6. Blade adjusting screw assembly; 7. Center-position cutter assembly A; 8. Left moving cutter assembly Ba; 9. Left moving cutter assembly Ca; 10. Right moving cutter assembly Bb; 11. Right moving cutter assembly Cb; 12. Servo drive system; 13. Rotary arm; 14. Support arm; 15. Air tube support; 16. Linear guide rail one; 17. Linear guide rail two; 18. Handle. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0017] Example 1 like Figures 1-12 As shown, this utility model embodiment provides a CNC cutting device for cutting rubber materials, including a frame 2, a mounting plate 3, a left moving cutting component Ba8, a right moving cutting component Bb10, a left moving cutting component Ca9, a right moving cutting component Cb11, a cutting adjustment screw component 6, a servo drive system 12, a linear guide rail 16, and a linear guide rail 2 17. Mounting plate 3 is fixed to frame 2. Linear guide rail 16 and linear guide rail 2 are fixedly connected to frame 2 respectively. The two are arranged in parallel to adapt to the movement requirements of different cutting blade components. The left moving cutter assembly Ba8 and the right moving cutter assembly Bb10 are respectively mounted on independent bases. The rear of the base has an integrally formed slider, which slides in cooperation with the linear guide rail 16. The upper rear of the base is welded with positive and negative threaded ball nuts, which mesh with the positive and negative threaded ball screws on both sides driven by the servo motor B in the cutter adjusting screw assembly 6. The left moving cutter assembly Ca9 and the right moving cutter assembly Cb11 are respectively mounted on independent bases. The slider at the rear of the base slides in cooperation with the linear guide rail 17. The positive and negative threaded ball nuts at the lower rear of the base mesh with the positive and negative threaded ball screws on both sides driven by the servo motor C in the cutter adjusting screw assembly 6. The output shafts of servo motors B and C are fixedly connected to one end of the corresponding ball screw through a coupling, and the other end of the ball screw is supported on the frame 2 through a bearing seat to ensure stable coaxiality when the ball screw rotates. The servo drive system 12 is electrically connected to servo motor B, servo motor C and encoder. The encoder receives the cutting width parameter set by the process recipe through wires.

[0018] In this embodiment, when the cutting width needs to be adjusted, the encoder of the servo drive system 12 converts the width parameter into the rotation angle of the servo motor B or C. After the angle signal is transmitted to the servo motor, it drives the ball screw to rotate. The positive and negative threads of the ball screw drive the ball nuts of the two cutting assemblies on both sides to move away or closer synchronously along the axial direction. With the guidance of linear guide rail 16 and linear guide rail 7, the movement of the cutting blade is prevented from deviating. This structure completely solves the problems of asynchronous movement of the cutting blade and low adjustment accuracy in traditional devices. It does not require manual adjustment and significantly improves the consistency of cutting dimensions. It is suitable for single or double strip rubber cutting scenarios with high width accuracy requirements, such as thin rubber strips for electronic components and automotive sealing strips.

[0019] Example 2 The difference between this embodiment and embodiment 1 is that: frame 2, mounting plate 3, tool holder centering assembly 5, rotating arm 13, support arm 14, handle 18, limit block 1, and scale frame 4; Mounting plate 3 is fixed to the top surface of frame 2, and scale frame 4 is fixed to the left side of mounting plate 3 by bolts. Its surface is engraved with positioning scale to assist manual calibration reference. The tool holder centering assembly 5 is fixed in the middle of the mounting plate 3, including a centering screw, a centering screw nut, and a centering bearing seat; one end of the centering bearing seat is welded and fixed to the mounting plate 3, the centering screw passes through the centering bearing seat and is clearance-fitted with the bearing seat, one end of the centering screw extends out of the centering bearing seat and abuts against the base side wall of the right moving cutter assembly Bb10, and the centering screw nut is threaded to the centering screw and fixed to the mounting plate 3 by screws; One end of the swing arm 13 is hinged to the frame 2 via a damping bearing, and the other end of the swing arm 13 is connected to the assembly handle 18 via a key. The outer surface of the handle 18 is covered with a nitrile rubber anti-slip sleeve. One end of the support arm 14 is welded and fixed to the rotating arm 13, and the other end abuts against the base of the right moving cutter assembly Bb10 through a rubber pad; Limiting blocks 1 are fixed to both sides of the frame 2 by bolts, and their positions correspond to the maximum travel of the cutter assembly to prevent the cutter from overtraveling and colliding.

[0020] In this embodiment, after the equipment is powered on, the operator only needs to rotate the centering screw. Through the threaded engagement between the centering screw and the centering screw nut, the extension length of the centering screw can be adjusted to stably abut against the cutter assembly base. The initial position positioning of the cutter is completed within 1-2 minutes, replacing the traditional 10-15 minutes of manual calibration. When the servo system fails, there is no need to disassemble the equipment. By holding the handle 18 and rotating the rotating arm 13, the support arm 14 can be pushed to move the cutter base along the linear guide rail. The cutter spacing can be adjusted with reference to the scale frame 4. Emergency adjustment can be completed within 5 minutes. The damping bearing prevents the rotating arm from wobbling, and the anti-slip sleeve improves the operating comfort. It completely solves the problems of difficult initial positioning and complicated fault maintenance of traditional devices, ensuring that the equipment can still maintain operation temporarily when the servo fails, thus improving production continuity.

[0021] Example 3 The difference between this embodiment and embodiment 2 is that: frame 2, mounting plate 3, mid-position cutter assembly A7, pneumatic system, and air tube support 15; Mounting plate 3 is fixed to frame 2. The center cutter assembly A7 is mounted on the center of mounting plate 3 via a liftable cylinder. The cylinder body is fixed to mounting plate 3 with bolts, and the cylinder piston rod is connected to the cutter body. The air pipe support 15 is welded to the side of the frame 2, and the cylinder's intake / exhaust pipes are fixed to the air pipe support 15 by pipe clamps; The pneumatic system includes a pneumatic housing, a DFM-25-50-P-GF type cylinder, a FRC-1 / 4-D-MINI-A type air source triplet, an MS4-LR-1 / 4-D6-AS type pressure reducing valve, a JMFH-5-1 / 4-B type solenoid valve, a GRLA-1 / 8-QS-8-RS-D type one-way throttle valve, an AMTE-M-LH-G14 type silencer, and an SMT-8M-PS-24V-K-5.0-0E type magnetic switch; The air source triplet is connected to the factory's compressed air via a ø16TU hose and is installed inside the pneumatic box on the right side; The pneumatic box door is opened and closed by screws to install a pressure reducing valve. A 0-1MPa pressure gauge is installed directly above the pressure reducing valve. When the door is closed, the pressure reducing valve handle can be adjusted directly to check the pressure. The pneumatic box contains three solenoid valves fixed by valve seats. Each solenoid valve is connected to a cylinder via a PAN-8X1.25-BL type air pipe (one cylinder corresponds to each of the center cutter assembly A7 and each moving cutter assembly). The solenoid valve is connected to a pressure reducing valve via a PAN-12X1.75-BL type air pipe, and the pressure reducing valve is connected to an air source triplet via an air pipe. One end of the one-way throttle valve is connected to the cylinder air pipe via a QS-G1 / 4-8 type threaded quick-connect coupling, and the other end is connected to the solenoid valve. The muffler is connected to the solenoid valve exhaust port via a threaded connection; A magnetic switch is fixed on the tracheal support 15 by an L-shaped bracket. The magnetic switch is set to correspond to the position of the cylinder piston and is connected to the servo drive system 12 by a wire. The pressure reducing valve has a Chinese nameplate, and the solenoid valve and air source triplet have an English control air circuit nameplate. When purchasing from the manufacturer, an additional 20% quantity of QS-8 quick-connect couplings and PUN-8X1.25-S-1-DU0-BS spiral air hoses are provided as spare parts. UK3N type wiring terminals are installed in the pneumatic box and interfaces are reserved.

[0022] In this embodiment, the air source triplet filters, regulates, and mists the compressed air to ensure clean and stable air entering the cylinder; a one-way throttle valve adjusts the cylinder's lifting and lowering speed to prevent the cutter from moving too quickly; a magnetic switch provides real-time feedback on the cylinder piston position to ensure the cutter is fully positioned, preventing incomplete cutting or rubber material collision; a silencer reduces the exhaust noise of the solenoid valve to below 60dB, improving the working environment; a bilingual nameplate facilitates quick identification of the air path by operators, reducing the error rate to below 1%; additional spare parts can be replaced immediately when air pipes or connectors are damaged, avoiding maintenance waiting time; this structure solves the problems of messy layout, confusing labeling, and difficult maintenance of traditional pneumatic systems, reducing the air path failure rate to below 2% and the equipment availability to over 98%, making it suitable for long-term continuous rubber cutting operations (such as mass production scenarios for tire rubber strips, daily necessities rubber parts, etc.).

[0023] Working principle and usage process of this utility model: Initial positioning stage: After the equipment is powered on, the operator rotates the centering screw of the tool holder centering assembly 5. Through the threaded engagement between the centering screw and the centering screw nut, the extension length of the centering screw is adjusted so that one end stably abuts against the base side wall of the left moving cutter assembly Ba8 or the right moving cutter assembly Bb10. After the servo drive system 12 detects the contact signal between the cutter assembly and the centering screw, it determines that the cutter assembly has reached the initial position, records the initial parameters, and completes the positioning. At the same time, the limit block 1 can prevent the cutter assembly from moving beyond its travel range, ensuring the safety of the positioning process. Air supply stage: The operator opens the compressed air valve in the plant, and the compressed air enters the air source triplet in the pneumatic box through the hose. The air source triplet filters, regulates the pressure, and treats the oil mist in the compressed air. The treated compressed air is divided into two paths. One path enters the pressure reducing valve, which regulates the pressure to the set pressure before delivering it to the solenoid valve. The other path can be stored in the air tank (if configured) as a backup air source. At the same time, the wiring terminals in the pneumatic box are connected to the power supply, and the solenoid valve and magnetic switch enter the standby state. The pressure gauge displays the current air pressure value in real time for easy monitoring by the operator. Cutting blade adjustment stage: Select single or double cutting mode according to the cutting requirements of the rubber compound. Single-strip cutting: The operator sets the cutting width in the process formula. After the servo drive system 12 receives the parameters, the encoder converts the width parameters into the corresponding rotation angle of the servo motor. The servo motor drives the ball screw to rotate. The ball screw, through engagement with the ball nut, drives the cutter assembly to move along the linear guide to the set width position. The servo motor is locked, and the cutter position is fixed. Double-strip cutting: The servo drive system 12 controls the servo motors B and C respectively, driving the B and C groups of cutter assemblies to move to the set width on both sides, while the middle cutter assembly A7 remains in its initial position as the middle dividing reference for the double strips of rubber, thus completing the cutter position adjustment; Cutting execution phase: Single-strip cutting: The servo drive system 12 sends an action signal to the solenoid valves of the mid-position cutter assembly A7 and the corresponding cutter group. The solenoid valves reverse, and compressed air enters the lower chamber of the cylinder through the one-way throttle valve, pushing the cylinder piston rod upward and causing the cutter to descend to the cutting position. After the magnetic switch detects that the cylinder piston has reached the lower dead center, it sends a feedback signal to the servo system. The system controls the rubber material conveying mechanism to convey the rubber material, and the cutter completes the cutting. After cutting, the solenoid valve reverses, and compressed air enters the upper chamber of the cylinder, pushing the cutter upward to reset. The magnetic switch detects the upper dead center, completing one cutting cycle. Dual-strip cutting: The servo system simultaneously sends signals to the solenoid valves of the center cutting assembly A7, group B, and group C cutters. The three groups of cutters descend synchronously. The center cutting assembly A7 divides the rubber material, while group B and group C cut the rubber material on both sides respectively. After cutting, all cutters rise and reset synchronously, achieving one-time cutting and forming of two strips of rubber material. When the solenoid valves switch, the muffler absorbs exhaust noise, improving the working environment. Emergency Support Phase: If the servo motor or encoder malfunctions, the operator can hold handle 18 and rotate arm 13 to overcome the resistance of the damping bearing. Arm 13 drives support arm 14 to push the cutter base. The cutter base slider slides along the linear guide rail. Adjust the cutter spacing to the required width by referring to the scale of ruler frame 4. After adjustment, the damping bearing keeps arm 13 in a fixed position, and support arm 14 continues to abut against the cutter base to ensure that the cutter does not deviate during cutting. If the pneumatic system pressure is abnormal, the pressure switch of the air source triplet will sound an alarm. The operator can check the air source or replace the damaged pneumatic component (using reserved spare parts) to quickly restore the air supply and ensure continuous operation of the equipment.

[0024] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A CNC cutting device for cutting rubber materials, comprising a frame (2), a mounting plate (3), a limiting block (1), a ruler frame (4), a tool holder centering assembly (5), a cutting tool adjusting screw assembly (6), a center cutting tool assembly A (7), a left moving cutting tool assembly Ba (8), a left moving cutting tool assembly Ca (9), a right moving cutting tool assembly Bb (10), a right moving cutting tool assembly Cb (11), a servo drive system (12), a rotating arm (13), a support arm (14), an air tube support (15), a linear guide rail one (16), a linear guide rail two (17), a handle (18), and a pneumatic system, characterized in that: The mounting plate (3) is fixed to the frame (2), and the ruler frame (4) and the tool holder centering assembly (5) are respectively fixed to the mounting plate (3); The tool holder centering assembly (5) includes a centering screw, a centering screw nut, and a centering bearing seat; One end of the centering bearing seat is fixedly connected to the mounting plate (3), the centering screw is inserted into the centering bearing seat, one end of the centering screw extends out of the centering bearing seat and abuts against the base side wall of the left moving cutter assembly Ba (8) or the right moving cutter assembly Bb (10), the centering screw nut is threadedly connected to the centering screw and fixed to the mounting plate (3); The middle-position cutter assembly A (7) is mounted on the mounting plate (3) by a liftable cylinder. The cylinder pipeline is fixed to the air pipe bracket (15). The air pipe bracket (15) is fixedly connected to the frame (2), and the left and right positions of the middle-position cutter assembly A (7) are fixed. The left moving cutter assembly Ba (8) and the right moving cutter assembly Bb (10) are respectively installed on independent bases. A slider is provided at the rear of the base. The slider is slidably engaged with the linear guide rail (16). The linear guide rail (16) is fixedly connected to the frame (2). A positive and negative threaded ball nut is provided at the upper rear of the base. The nut meshes with the positive and negative threaded ball screws driven by the servo motor B in the cutter adjusting screw assembly (6). The left moving cutter assembly Ca (9) and the right moving cutter assembly Cb (11) are respectively installed on independent bases. A slider is set at the rear of the base. The slider is slidably engaged with the linear guide rail II (17). The linear guide rail II (17) is fixedly connected to the frame (2). A positive and negative threaded ball nut is set at the lower rear of the base. The nut meshes with the positive and negative threaded ball screws on both sides driven by the servo motor C in the cutter adjusting screw assembly (6). One end of the rotating arm (13) is hinged to the frame (2), and the other end is equipped with a handle (18). One end of the support arm (14) is fixedly connected to the rotating arm (13), and the other end of the support arm (14) abuts against the cutter base. The servo drive system (12) is electrically connected to servo motor B, servo motor C and encoder; The pneumatic system includes a pneumatic box, cylinder, air supply triplet, pressure reducing valve, and solenoid valve; The air source triplet is connected to the compressed air in the factory through a hose and is installed inside the pneumatic box on the right side; a pressure reducing valve is installed on the opening and closing door of the pneumatic box, and a pressure gauge is installed directly above the pressure reducing valve; Three or more solenoid valves with valve seats are installed in the pneumatic box, and the solenoid valves are connected to the cylinder. The mounting plate (3) is provided with four through holes, which are drilled to match the threaded holes on the frame (2); The pneumatic box is equipped with wiring terminals and reserved interfaces, and the limit block (1) is fixedly connected to the frame (2).

2. The CNC cutting device for cutting rubber materials according to claim 1, characterized in that: The middle cutting blade assembly A (7), the left moving cutting blade assembly Ba (8), the left moving cutting blade assembly Ca (9), the right moving cutting blade assembly Bb (10), and the right moving cutting blade assembly Cb (11) each correspond to a cylinder. Each cylinder is connected to a solenoid valve through an air pipe. The solenoid valve is connected to a pressure reducing valve through an air pipe. The pressure reducing valve is connected to an air source triple unit through an air pipe.

3. The CNC cutting device for cutting rubber materials according to claim 1, characterized in that: The output shaft of the servo motor B is fixedly connected to the ball screw in the cutter adjusting screw assembly (6) via a coupling. The ball screw has positive and negative threads on both sides, and the two ends of the ball screw are supported on the frame (2) by bearing seats.

4. The CNC cutting device for cutting rubber materials according to claim 1, characterized in that: The output shaft of the servo motor C is fixedly connected to another ball screw in the cutter adjusting screw assembly (6) via a coupling. The ball screw has positive and negative threads on both sides, and the two ends of the ball screw are supported on the frame (2) by bearing seats.

5. The CNC cutting device for cutting rubber materials according to claim 1, characterized in that: The encoder of the servo drive system (12) is connected to the servo motor B and the servo motor C via wires.

6. The CNC cutting device for cutting rubber materials according to claim 1, characterized in that: The pneumatic system also includes a one-way throttle valve and a muffler; one end of the one-way throttle valve is connected to the cylinder air pipe through a threaded quick-connect fitting, and the other end is connected to the solenoid valve; the muffler is connected to the exhaust port of the solenoid valve through a thread; a magnetic switch is also fixed on the air pipe bracket (15), and the magnetic switch is connected to the servo drive system (12) through a wire, and the magnetic switch is set to correspond to the position of the cylinder piston.

7. The CNC cutting device for cutting rubber materials according to claim 1, characterized in that: The hinge joint between the rotating arm (13) and the frame (2) is provided with a damping bearing, and the outer surface of the handle (18) is covered with an anti-slip rubber sleeve; the centering screw, centering screw nut and centering bearing seat of the tool holder centering assembly (5) are respectively made of suitable metal materials.

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