Carbon extrusion hydraulic synchronous shearing device, shearing blade and shearing method
By employing hydraulic closed-loop synchronous control and an eccentrically arranged shear blade design, the problems of easy damage to the mechanical synchronous shearing device and electrode suspension and deformation in traditional carbon extruders have been solved, achieving efficient and stable electrode shearing and improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FIRST HEAVY IND GRP TIANJIN HEAVY IND CO LTD
- Filing Date
- 2026-04-23
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional carbon extruders have mechanical synchronous shearing devices that are prone to damage and difficult to maintain, resulting in low production efficiency. Furthermore, the need for additional complex lifting mechanisms leads to complex equipment structures and high control difficulty, and the electrodes are prone to suspension and deformation during the shearing process.
By adopting hydraulic closed-loop synchronous control technology, and through the eccentric arrangement of the hydraulic cylinder center and the oblique cutting angle design of the shear blade, combined with the guiding device, high-precision synchronous shearing of the shear blade is achieved, avoiding electrode suspension and deformation, and simplifying the equipment structure.
It improves shearing accuracy and equipment stability, reduces scrap rate and maintenance difficulty, enhances production efficiency and product quality, and simplifies equipment structure and control complexity.
Smart Images
Figure CN122425798A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of carbon extrusion equipment, and particularly relates to a hydraulic synchronous shearing device, shear blades, and shearing method for a carbon extruder. Background Technology
[0002] With the rapid development of large-capacity ultra-high power electric furnaces, the requirements for the output and quality of ultra-high power graphite electrodes are increasing. During electrode production, it is required to perform continuous shearing without stopping the machine, and the shearing speed must be synchronized with the extrusion speed of the press.
[0003] Traditional extrusion presses often employ fixed shearing devices, meaning that extrusion stops after the electrode reaches a set length before shearing resumes. This intermittent operation causes repeated and abrupt changes in electrode extrusion pressure and speed, severely affecting the homogeneity and stability of the electrode's axial structure, especially the significant density difference between the front and rear ends. Furthermore, asynchronous shearing on both sides can cause electrode skew during shearing, leading to defects such as cracks, and resulting in low extrusion efficiency. To address this issue, existing technologies have developed carbon extrusion presses using mechanically synchronized shearing, such as gears and racks, to ensure synchronized shearing on both sides. However, such structures are complex and precise. During production, factors such as high temperature, humidity, and corrosive environments can easily cause these components to rust, jam, or become damaged, leading to synchronization failure, difficult maintenance, and the need to redesign and adjust the transmission mechanism, increasing the difficulty and cost of equipment modification and impacting production efficiency. Additionally, the mechanical movement speed of the gears and racks cannot be too high, further limiting production efficiency.
[0004] Furthermore, during the electrode shearing process, the electrode extruded from the material chamber is often suspended near the shearing point. Because the electrode (especially the carbon green body) is relatively soft and has low strength at this time, without effective support before and after shearing, it is highly susceptible to bending deformation due to its own weight, and may even crack or break. Therefore, traditional equipment typically requires additional complex lifting or fixed material-dragging mechanisms to support the electrode extruded from the material chamber throughout the entire process, ensuring that the electrode ends do not become suspended before and after shearing. However, adding such lifting mechanisms not only makes the overall equipment structure more complex, increasing manufacturing costs and installation and debugging difficulties, but also introduces additional control complexity in coordinating the lifting mechanism with the shearing action. If the coordination is improper, it is still difficult to completely avoid localized deformation or surface damage of the electrode, affecting the final quality and yield of the electrode product.
[0005] Therefore, there is an urgent need to develop a shearing device with high synchronization accuracy, strong environmental adaptability, which can avoid the problem of electrode suspension and deformation in principle, and has a simpler structure. Summary of the Invention
[0006] To address the problems of easily damaged, difficult-to-maintain, and low-efficiency mechanical synchronization structures in existing technologies, as well as the need for complex lifting mechanisms in traditional shearing devices to prevent electrode deformation due to suspension, resulting in complex equipment structures and high control difficulty, this invention provides a hydraulic synchronous shearing device and shear blades for a carbon extruder. This invention employs hydraulic closed-loop synchronous control technology to achieve real-time synchronization of the speed and position of the shear blades on both sides, ensuring rapid shearing while maintaining shearing accuracy. By arranging the electrode center vertically above the center of the hydraulic cylinder, the upward component force generated during shearing naturally counteracts the electrode's own weight, fundamentally preventing the electrode from bending, flattening, or cracking due to suspension or downward pressure, eliminating the need for complex lifting mechanisms. Simultaneously, combined with optimized shear blade beveling angles and guide structures, it significantly improves the quality of the sheared end face, equipment operational stability, and ease of maintenance.
[0007] The present invention is implemented as follows: a hydraulic synchronous shearing device for a carbon extruder includes a frame, two hydraulic cylinders symmetrically installed at both ends of the frame, and two shear blades respectively installed at the drive ends of the corresponding hydraulic cylinders; characterized in that it also includes a hydraulic control system, two displacement sensors and a controller;
[0008] The hydraulic control system includes a variable pump that supplies oil to two hydraulic cylinders individually, and two proportional valves that control the oil flow rate of each hydraulic cylinder. Two displacement sensors are respectively installed on the two hydraulic cylinders to measure the position of their respective driven shear blades in real time. The controller is connected to the proportional valves and the displacement sensors respectively, and is configured to: based on the feedback signal from the displacement sensors, adjust the opening size of the proportional valves to control the two hydraulic cylinders to drive their respective shear blades to move relative to each other towards the center at a synchronized speed and position to shear the electrode; and the center of the electrode is located above the center of the hydraulic cylinder in the vertical direction.
[0009] In the above technical solution, preferably, the blade planes of the two relatively moving scissor blades are both arranged at an angle, the angle of inclination of the blade plane is 75°-80° with the horizontal plane, and the two blade planes are parallel; the blade angle of the scissor blades is oblique.
[0010] In the above technical solution, it is further preferred that the blade angle of the scissor blade is 8°-10°.
[0011] In the above technical solution, preferably, it also includes two guide devices symmetrically installed at the top and bottom of the frame. Each guide device includes a base installed on the frame, and an end slide plate and two side slide plates installed on the base. The end slide plate and the two side slide plates form a slot. The top and bottom of the scissor blade are slidably connected to the corresponding slots.
[0012] In the above technical solution, it is further preferred that the scissor blade is mounted on the scissor holder by screws, and the top and bottom of the scissor holder are slidably connected to the corresponding slots.
[0013] In the above technical solution, a more preferred embodiment is that the hydraulic cylinder is mounted on the frame by screws, and the drive end of the hydraulic cylinder is connected to the corresponding scissor seat through a ball joint lug.
[0014] In the above technical solution, it is further preferred that the end slide plate and the side slide plate are made of a self-lubricating material.
[0015] In the above technical solution, preferably, the scissor blade is made of 6CrW2Si material.
[0016] A shear blade for a carbon extruder hydraulic synchronous shear, used in the aforementioned carbon extruder hydraulic synchronous shearing device, is characterized in that the blade plane of the shear blade is arranged at an inclination angle of 75°-80° with the horizontal plane, and the blade planes of the two shear blades of the shearing electrode are parallel; the blade angle of the shear blade is oblique and is 8°-10°.
[0017] A method for hydraulic synchronous shearing in a carbon extruder includes the following steps: Start the variable pump to supply oil to the two hydraulic cylinders respectively; When the extruded electrode reaches the preset length, the controller controls the two proportional valves to open; the controller receives the position signals of the respective shear blades from the two displacement sensors in real time, and adjusts the opening size of the two proportional valves accordingly, so that the two hydraulic cylinders drive their respective shear blades to move towards the center at a synchronized speed and position, thus completing the shearing of the electrode. After the shearing is completed, the controller controls the two hydraulic cylinders to drive their respective shear blades to quickly return to the initial position, waiting for the next shearing command.
[0018] The advantages and positive effects of this invention are: 1. This invention achieves high-precision speed and position synchronization of the dual hydraulic cylinder-driven shear blades through a hydraulic closed-loop control system using a variable pump for independent oil supply and a proportional valve and displacement sensor in conjunction with the controller. This effectively avoids shear skew and significantly reduces the scrap rate. Furthermore, it makes the shearing system completely independent of the main hydraulic system, resulting in fast response speed and strong anti-interference ability, overcoming the defects of mechanical synchronization structures that are prone to corrosion and jamming.
[0019] 2. This invention utilizes a unique eccentric arrangement where the center of the hydraulic cylinder is lower than the center of the electrode. This generates an upward force during shearing to counteract the electrode's own weight, fundamentally replacing the complex lifting mechanism in traditional equipment. This not only avoids problems such as bending, cracking, or breakage of the electrode due to suspension or downward pressure, but also significantly simplifies the equipment structure, reduces manufacturing costs, and lowers control difficulty. Furthermore, the eccentric arrangement and hydraulic synchronous control work together. The hydraulic synchronization ensures the smooth closing of the shear blades, and the eccentric force acts continuously throughout the shearing process. The combination of these two features achieves a shearing effect that is "lift-free and deformation-free".
[0020] 3. The shear blade of this invention adopts a special geometric shape with a 75°-80° bevel angle and an 8°-10° cutting edge angle. Optimized through stress analysis, it exhibits low shearing resistance, a smooth and flat shearing surface, ensuring the quality of the electrode end face, improving shearing accuracy, reducing waste, and thus increasing production efficiency and product quality. Furthermore, the combination of the beveled shear blade and its eccentric arrangement ensures that the upward component force during shearing, along with the bevel and the wedging direction of the cutting edge, forms a combined force that counteracts the electrode's own weight. This results in a more uniform shear stress distribution on the electrode end face, further reducing the risk of edge chipping and cracking. Simultaneously, the shear blade angle can be adjusted according to different electrode diameter specifications.
[0021] 4. The dual-guide device of the present invention ensures the smooth and reliable movement of the scissor blade, and the ball joint lug connection compensates for installation errors. The dual-guide device and the ball joint lug work together to make the transmission both rigid and flexible, protecting the hydraulic cylinder; the 6CrW2Si material scissor blade is wear-resistant and impact-resistant, and matches the 80° oblique cutting angle, which greatly improves the blade life.
[0022] 5. The shear blade and shear base are connected by separate screws, which supports quick online replacement, making maintenance convenient, greatly reducing downtime for maintenance and improving production efficiency.
[0023] This invention has significant positive implications for improving production precision, efficiency, product quality, and equipment stability. Its value is reflected in multiple dimensions, including synchronous control, material adaptability, structural optimization, and intelligent applications. Attached Figure Description
[0024] The technical solutions of the embodiments of this application will be further described in detail below with reference to the accompanying drawings. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of this application. In addition, unless otherwise specified, these drawings are only intended to conceptually illustrate the structural construction described herein and are not necessarily drawn to scale.
[0025] Figure 1 This is a schematic diagram of the structure of the hydraulic synchronous shearing device for the carbon extruder of the present invention; Figure 2 This is a schematic diagram showing the positional relationship between the shearing device and the motor of the present invention; Figure 3 This is a schematic diagram of the structure of the scissor seat and the guide device of the present invention; Figure 4 This is a hydraulic schematic diagram of the hydraulic control system of the present invention; Figure 5 This is a schematic diagram of the arrangement of the scissor blades in this invention; Figure 6 This is a schematic diagram of the blade angle of the scissor blade of the present invention.
[0026] In the diagram: 1. Frame; 2. Hydraulic cylinder; 3. Scissor blade; 4. Variable pump; 5. Proportional valve; 6. Displacement sensor; 7. Guide device; 71. Base; 72. End slide plate; 73. Side slide plate; 8. Scissor seat; 9. Ball joint lug; 10. Nozzle; 11. Electrode. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings: In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.
[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "joining," "installation," and "assembly" 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0029] Please see Figures 1-6 An embodiment of the present invention provides a hydraulic synchronous shearing device for a carbon extruder, comprising a frame 1, two hydraulic cylinders 2 symmetrically mounted at both ends of the frame 1, and two shear blades 3 respectively mounted at the drive ends of the corresponding hydraulic cylinders 2.
[0030] It also includes a hydraulic control system, two displacement sensors 6, and a controller, achieving high-precision synchronous shearing. The hydraulic control system includes a variable pump 4 that supplies oil to two hydraulic cylinders 2 individually, and two proportional valves 5 that control the oil flow rate of each hydraulic cylinder 2. The variable pump 4 is connected to the two proportional valves 5, and the proportional valves 5 are connected to the corresponding hydraulic cylinders 2. The two displacement sensors 6 are respectively installed on the two hydraulic cylinders 2 to measure the position of the shear blades 3 driven by each cylinder in real time. The controller is connected to the proportional valves 5 and the displacement sensors 6. The controller is configured to: based on the feedback signal from the displacement sensors 6, adjust the opening size of the proportional valves 5 to precisely control the oil pressure and flow rate entering the two hydraulic cylinders 2, thereby controlling the two hydraulic cylinders 2 to drive their respective shear blades 3 to move relative to each other towards the center at a synchronized speed and position to shear the electrode. The hydraulic cylinders 2 on both sides of the shears are supplied with oil independently by the variable pump 4, avoiding interference from the movement of other actuators on the oil pressure and flow of the shearing system. Moreover, the two hydraulic cylinders 2 are each controlled independently by two proportional valves 5, and are not affected by the movement of the other hydraulic cylinder 2. The two proportional valves 5 and two displacement sensors 6 work together with the controller to form a closed-loop control, which can adjust the movement speed and position of the shear blades 3 in real time, ensuring that the shear blades 3 on both sides can achieve precise mechanical synchronization under any working conditions, avoiding the shear blades 3 from being skewed or unevenly shearing, thereby preventing the electrode from being cut crooked, greatly improving the product qualification rate, and eliminating the problem of asynchronous movement caused by friction and hydraulic resistance differences.
[0031] This combination of hydraulic closed-loop synchronous control and independent oil supply from a variable pump ensures that the shearing action is unaffected by other actions of the main unit. The synchronization accuracy and response speed far exceed those of traditional mechanical synchronization structures, while also avoiding the problem of gear and rack jamming failure in harsh environments. This synchronization is particularly important for high-precision applications such as carbon materials, significantly reducing the scrap rate caused by shearing deviations.
[0032] The center of the electrode is vertically positioned above the center of the hydraulic cylinder 2. This eccentric arrangement generates an upward force when the hydraulic cylinder 2 pushes the shear blade 3 to cut. This force effectively counteracts the electrode's own weight, preventing a downward force from flattening or bending the softer electrode. This eccentric arrangement works in conjunction with the aforementioned hydraulic synchronization control features. On one hand, hydraulic synchronization ensures smooth, opposing movement of the shear blades, avoiding impact lateral forces; on the other hand, the upward force generated by the eccentricity acts continuously throughout the cutting process, allowing the electrode to maintain a horizontal posture even without support from a lifting mechanism, thus completely solving the technical problem of suspended bending in traditional equipment.
[0033] More importantly, this design eliminates the need for an additional support mechanism to support the electrode when it is suspended near the shearing point. It can ensure the stability of the electrode's shape before and after shearing without the need for a complex support device, which significantly simplifies the equipment structure, reduces manufacturing costs and control difficulty, and further ensures the shearing quality.
[0034] In a preferred embodiment, the structure of the shear blades 3 is specially designed to optimize the shearing effect and ensure the flatness of the electrode end face. The blade planes of the two relatively moving shear blades 3 are both inclined, with an inclination angle of 75°-80° to the horizontal plane, preferably 80°, and the two blade planes are parallel. The blade angle of the shear blades 3 is oblique, with an angle of 8°-10°, preferably 10°. Stress analysis has confirmed that an 80° angle is the optimal configuration for shearing effect, ensuring smooth shearing, reducing shearing resistance, reducing local stress concentration in the material, improving shearing quality, and extending the service life of the shear blades 3. The 10° oblique cutting edge ensures a smooth and flat electrode end face after shearing, without any bevel, significantly improving the product end face quality and reducing subsequent processing allowances. Furthermore, the combination of the oblique cutting blade and the eccentric arrangement features results in a combined force between the upward component of the shearing force and the oblique cutting and the wedging direction of the blade edge. This makes the shear stress distribution on the electrode end face more uniform, further reducing the risk of edge chipping and cracking.
[0035] In a preferred embodiment, two guide devices 7 are symmetrically installed at the top and bottom of the frame 1. Each guide device 7 includes a base 71 mounted on the frame 1, and an end slide plate 72 and two side slide plates 73 mounted on the base 71. The end slide plate 72 and the two side slide plates 73 form a slot, and the top and bottom of the shear blade 3 are slidably connected to the corresponding slots. This guide device 7 provides additional guiding support for the movement of the shear blade 3, besides the piston rod of the hydraulic cylinder 2, ensuring smooth and reliable operation, especially able to withstand the huge lateral forces and bending moments generated during shearing. The double guide slot design at the top and bottom effectively restricts the degree of freedom of the shear blade 3 in the non-movement direction, ensuring that it will not deviate or vibrate during shearing, thereby improving the positioning accuracy and stability of the shearing. Both the end slide plate 72 and the side slide plates 73 are made of self-lubricating materials, such as high-strength brass with graphite or JDB-1, to ensure smooth sliding. The combination of dual-guide device and hydraulic synchronous control enables the shear blades to maintain linear motion even under high-frequency, high-speed shearing conditions, significantly extending the life of the hydraulic cylinder seals.
[0036] In a preferred embodiment, the shear blade 3 is mounted on the shear seat 8 by screws, and the top and bottom of the shear seat 8 are slidably connected to the corresponding slots. When the shear blade 3 is worn and needs to be replaced, the operator can quickly remove the screws on the equipment for replacement without disassembling the entire shear seat 8 and guide device 7, which greatly reduces equipment downtime and maintenance difficulty, lowers maintenance costs, and is adaptable to carbon materials of different shapes and sizes.
[0037] In a preferred embodiment, the hydraulic cylinder 2 is mounted on the frame 1 with screws, and the drive end of the hydraulic cylinder 2 is connected to the corresponding scissor seat 8 via a ball joint clevis 9. The ball joint clevis 9 connection allows for a slight angular deviation between the piston rod of the hydraulic cylinder 2 and the scissor seat 8, avoiding additional loads and jamming caused by rigid connections due to machining and assembly errors. Combined with the guiding device, this makes the entire transmission chain both rigid and flexible, significantly improving the system's impact resistance and alignment, ensuring smooth transmission of thrust from the hydraulic cylinder 2, and protecting the seals and piston rod of the hydraulic cylinder 2, thus extending their service life.
[0038] In the above technical solution, preferably, the shear blade 3 is made of 6CrW2Si material. 6CrW2Si is an alloy tool steel with excellent wear resistance, high toughness, and good impact resistance. Using this material to manufacture the shear blade 3 allows it to adapt to the high hardness and high wear conditions of carbon materials during shearing, significantly extending its service life in continuous, high-load shearing tasks, reducing the frequency of blade replacement, and ensuring production continuity. Furthermore, the wear-resistant material matches the geometric parameters of the 80° bevel angle and 10° cutting edge angle, making the blade less prone to chipping and rapid wear when shearing high-hardness carbon materials, resulting in an overall service life 2-3 times longer than ordinary tool steel shear blades.
[0039] A shear blade 3 for a carbon extruder hydraulic synchronous shear, used in the aforementioned carbon extruder hydraulic synchronous shearing device, is characterized in that the blade plane of the shear blade 3 is arranged at an inclination angle of 75°-80° with the horizontal plane, and the blade planes of the two shear blades 3 of the shearing electrode are parallel; the blade angle of the shear blade 3 is oblique and the blade angle is 8°-10°.
[0040] The working process of the hydraulic synchronous shearing device for the carbon extruder of the present invention is as follows: During operation, first assemble the components according to the above connection relationship. After starting the equipment, the variable pump 4 starts working, supplying oil to the two hydraulic cylinders 2 independently. Adjust the system pressure to the design value (e.g., 16-20MPa) and test whether the extension and retraction speeds of the hydraulic cylinders 2 are consistent. Monitor the displacement of the connecting plate through the position sensor to ensure that the hydraulic cylinders 2 on both sides push synchronously and avoid the shear blades 3 from being skewed.
[0041] The shearing process officially begins. When the electrode 11 extruded from the nozzle 4 reaches the preset length, the controller issues a command, and the two proportional valves 5 open according to their initial settings. Hydraulic oil drives the piston rods of the two hydraulic cylinders 2 to extend, pushing the shear seat 8 and the shear blades 3 mounted on it along the slot of the guide device 7 towards the central electrode via the ball joint lugs 9. During this process, the displacement sensor 6 feeds back the position signal of the shear blades 3 to the controller in real time. The controller calculates the position and speed difference between the two sides and adjusts the opening degree of the two proportional valves 5 in real time, forming a closed-loop control. This ensures that the two hydraulic cylinders 2 drive their respective shear blades 3 to move towards the center at completely synchronized speed and position, completing the shearing of the electrode. Since the center of the electrode is higher than the center of the hydraulic cylinder 2, the upward component force generated during shearing naturally offsets the weight of the electrode, ensuring that the electrode remains stable and does not bend without any additional lifting mechanism.
[0042] After shearing is completed, the controller controls the proportional valve 5 to switch direction, and the hydraulic cylinder 2 drives the shear blade 3 to quickly return to the initial position, waiting for the next shearing command.
[0043] Carbon materials (such as electrodes and graphite) are characterized by high hardness and brittleness, making them prone to chipping or tool wear with traditional shearing methods. This invention utilizes a hydraulic synchronous shearing mechanism to ensure simultaneous operation of the shears on both sides during electrode shearing. This uniform force application reduces localized stress concentration in the material, improving shearing quality and product yield, while also optimizing equipment stability and maintenance efficiency. The unique shear blade design ensures the flatness of the electrode end face while improving shearing precision, reducing waste, and guaranteeing output, thereby increasing production efficiency and product quality.
[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention.
Claims
1. A hydraulic synchronous shearing device for a carbon extruder, comprising a frame, two hydraulic cylinders symmetrically mounted at both ends of the frame, and two shear blades respectively mounted at the drive ends of the corresponding hydraulic cylinders; characterized in that: It also includes a hydraulic control system, two displacement sensors, and a controller; The hydraulic control system includes a variable pump that supplies oil to two hydraulic cylinders individually, and two proportional valves that control the oil flow rate of each hydraulic cylinder. Two displacement sensors are respectively installed on the two hydraulic cylinders to measure the position of their respective driven shear blades in real time. The controller is connected to the proportional valves and the displacement sensors respectively, and is configured to: based on the feedback signal from the displacement sensors, adjust the opening size of the proportional valves to control the two hydraulic cylinders to drive their respective shear blades to move relative to each other towards the center at a synchronized speed and position to shear the electrode; and the center of the electrode is located above the center of the hydraulic cylinder in the vertical direction.
2. The hydraulic synchronous shearing device for a carbon extruder according to claim 1, characterized in that: The blades of the two relatively moving scissor blades are both arranged at an angle of 75°-80° with respect to the horizontal plane, and the two blades are parallel; the blade angle of the scissor blades is oblique.
3. The hydraulic synchronous shearing device for a carbon extruder according to claim 2, characterized in that: The blade angle of the scissors is 8°-10°.
4. The hydraulic synchronous shearing device for a carbon extruder according to claim 1, characterized in that: It also includes two guide devices symmetrically installed at the top and bottom of the frame. Each guide device includes a base mounted on the frame, and an end slide plate and two side slide plates mounted on the base. The end slide plate and the two side slide plates form a slot. The top and bottom of the scissor blade are slidably connected to the corresponding slots, respectively.
5. The hydraulic synchronous shearing device for a carbon extruder according to claim 4, characterized in that: The scissor blades are mounted on the scissor holder by screws, and the top and bottom of the scissor holder are slidably connected to the corresponding slots.
6. The hydraulic synchronous shearing device for a carbon extruder according to claim 5, characterized in that: The hydraulic cylinder is mounted on the frame with screws, and the drive end of the hydraulic cylinder is connected to the corresponding scissor seat through a ball joint lug.
7. The hydraulic synchronous shearing device for a carbon extruder according to claim 4, characterized in that: The end plate and side plate are made of a self-lubricating material.
8. The hydraulic synchronous shearing device for a carbon extruder according to claim 1, characterized in that: The shear blades are made of 6CrW2Si material.
9. A shear blade for a hydraulic synchronous shearing device of a carbon extruder, used in the hydraulic synchronous shearing device of a carbon extruder as described in any one of claims 1 to 8, characterized in that, The blades of the scissors are arranged at an angle of 75°-80° to the horizontal plane, and the blades of the two scissors of the shearing electrode are parallel; the blade angle of the scissors is oblique and is 8°-10°.
10. A method for hydraulic synchronous shearing of a carbon extruder, implemented based on the hydraulic synchronous shearing device for a carbon extruder according to any one of claims 1 to 8, characterized in that, Includes the following steps: Start the variable pump to supply oil to the two hydraulic cylinders respectively; When the extruded electrode reaches the preset length, the controller controls the two proportional valves to open; The controller receives position signals of the shear blades from the two displacement sensors in real time, and adjusts the opening size of the two proportional valves accordingly, so that the two hydraulic cylinders drive their respective shear blades to move towards the center at a synchronized speed and position to complete the shearing of the electrode. After the shearing is completed, the controller controls the two hydraulic cylinders to drive their respective shear blades to quickly return to the initial position, waiting for the next shearing command.