A carbon rod 61-degree cutting and fixing clamping device

By designing a 61-degree carbon rod cutting and clamping device, and utilizing components such as a horizontally moving base, a V-shaped limiting base plate, and a flipping limiting rod, the problem that carbon rod cutting equipment cannot achieve 61-degree cutting was solved, thus realizing efficient and precise cutting operations.

CN224446413UActive Publication Date: 2026-07-03ZHENGZHOU LONGZHIYUE AUTOMATIC CONTROL EQUIP TECH CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHENGZHOU LONGZHIYUE AUTOMATIC CONTROL EQUIP TECH CO LTD
Filing Date
2025-08-11
Publication Date
2026-07-03

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Abstract

This utility model relates to a carbon rod 61-degree cutting and fixing clamping device, including a horizontally moving base, a V-shaped limiting base plate, a flip-limiting rod, a connecting buckle located at the end of the flip-limiting rod, and a moving distance limiting block. The horizontally moving base is mounted on a support base and moves horizontally in the direction of approaching and moving away from the cutter under the support of the support base. The carbon rod body extending in the same direction is arranged inside the V-shaped limiting base plate. The flip-limiting rod covers the V-shaped limiting base plate in a direction perpendicular to the carbon rod body. The flip-limiting rod is provided with a cutting groove facing the cutter and allowing the cutter to pass through. A rotating limiting sleeve is fitted on the carbon rod body. The cutting angle of the cutter is limited by the rotation of the rotating limiting sleeve within the V-shaped limiting base plate. In summary, this utility model has the advantages of simple structure, convenient operation, low processing cost, high cutting efficiency, good cutting effect, ability to cut at special angles, and suitability for automated production.
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Description

Technical Field

[0001] This utility model belongs to the technical field of carbon rod processing equipment, specifically relating to a carbon rod 61-degree cutting and fixing clamping device. Background Technology

[0002] Carbon rods are industrial consumables and functional components made with carbon materials as their core. They need to be cut into different shapes during use. Compared with current waterjet cutting and laser cutting, mechanical cutting has the advantages of fast cutting speed and low cost. However, the current cutting of carbon rods is mainly a 360-degree cut to divide the carbon rod into different cylinders, which can quickly divide the carbon rod into different cylinders and facilitate subsequent transportation and use. However, in the fields of electrode processing, composite material connection, optical equipment and special tools, carbon rods need to be cut at 61 degrees. Currently, these 61-degree cuts require complex beveling machines or CNC cutting machines, which are not only complicated to operate, but also expensive. Existing ordinary equipment cannot be modified to perform 61-degree and full-angle cuts at the same time.

[0003] The invention patent application number "CN202210560345.7" entitled "A Dry Cell Carbon Rod Extraction Device and Its Usage Method" mentions "a dry cell carbon rod extraction device and its usage method, including a first mounting block, which is a rectangular block, with two sets of sliding grooves symmetrically opened on both sides of the upper end of the first mounting block, which are rectangular grooves, and sliding blocks are movably installed inside the two sets of sliding grooves. In this invention, by driving two sets of telescopic cylinders, two sets of third mounting blocks are moved to a side closer to each other. The two sets of third mounting blocks drive two sets of cutting machines to move, and the cutting machines cut the center position of the battery. Then, a swinging device is installed, and by a constraint device, it moves to a side away from the sliding blocks. By pulling the swinging device, two sets of movable barrels are driven to move to a side opposite to each other while swinging at a small angle. The two sets of movable barrels drive the battery shell to move to a side opposite to each other, thereby separating the battery shell from the carbon rod and improving work efficiency." This invention is not only complex in structure and inconvenient to operate, but also cannot guarantee the cutting accuracy.

[0004] Therefore, there is an urgent need for a carbon rod 61-degree cutting and fixing clamping device that can solve the problems of complex structure, high cost, low cutting efficiency, low cutting accuracy and unsuitability for automated production through simple matching of accessories. Summary of the Invention

[0005] In view of this, this utility model proposes a carbon rod 61-degree cutting and fixing clamping device, which is applied to the field of carbon rod processing equipment technology, and solves the existing technical problems of complex structure, high cost, low cutting efficiency, low cutting accuracy and unsuitability for automated production.

[0006] To achieve the above-mentioned technical objectives, the specific technical solution adopted by this utility model is as follows:

[0007] A carbon rod 61-degree cutting and fixing clamping device is set between a support base and a cutter located on the support base. It includes a horizontally moving base, a V-shaped limiting base plate, a flip-limiting rod, a connecting buckle at the end of the flip-limiting rod, and a moving distance limiting block. The horizontally moving base is set on the support base and moves horizontally towards and away from the cutter under the support of the support base. The V-shaped limiting base plate is set perpendicular to the horizontally moving base in the horizontal direction. A carbon rod body extending in the same direction is set inside the V-shaped limiting base plate. The flip-limiting rod covers the V-shaped limiting base plate in a direction perpendicular to the carbon rod body, limiting the position of the carbon rod body. The connecting buckle is set on the horizontally moving base, ensuring a detachable connection between the flip-limiting rod and the horizontally moving base. The flip-limiting rod has a cutting groove facing the cutter and allowing the cutter to pass through. A rotating limiting sleeve is fitted on the carbon rod body, limiting the cutting angle of the cutter by rotating the rotating limiting sleeve within the V-shaped limiting base plate.

[0008] Furthermore, two rotating limiting sleeves are respectively fitted onto the two ends of the carbon rod body and are located on both sides of the flip-limiting rod. The outer ring of the rotating limiting sleeve is provided with a rotating limiting block. By rotating the limiting block against different inner sidewalls of the V-shaped limiting base plate, the cutting angle of the carbon rod body can be adjusted.

[0009] Furthermore, the moving distance limit block is set on the side of the horizontal moving base near the cutting edge, limiting the maximum distance the horizontal moving base can move in the direction of the cutter. When the horizontal moving base moves to the position of the moving distance limit block, the cutter extends into the cutting groove and cuts to the center position of the top of the carbon rod body in the horizontal direction.

[0010] Furthermore, a moving push rod is provided at the end of the horizontal moving base away from the moving distance limit block. The moving push rod extends laterally and is located at the outer end of the V-shaped limit base plate. The moving position of the horizontal moving base is adjusted by the moving push rod.

[0011] Furthermore, the connecting buckle includes a vertically extending connecting rod, the bottom of which is rotatably connected to the horizontally movable base, and the top of which passes through the end of the flip-limiting rod. The connecting rod and the flip-limiting rod are fixed by a connecting nut set on the top of the connecting rod. The connecting nut is threadedly matched with the threaded part set on the top of the connecting rod. The moving push rod is located on the outside of the connecting rod in the horizontal direction and does not affect the rotation of the connecting rod.

[0012] Furthermore, the V-shaped limiting base plate includes two support plates with their bottoms close to each other. The two support plates are arranged parallel to each other, and the two support plates are provided with limiting grooves located below the cutting grooves and extending in the same direction, so that the bottom of the cutter can enter the limiting grooves to cut the carbon rod body.

[0013] Furthermore, the outer sidewall of the rotation limiting block adopts an arc-shaped sidewall with the same center and curvature as the rotation limiting sleeve. Both lateral outer sidewalls of the rotation limiting block extend toward the center of the rotation limiting sleeve. The two lateral outer sidewalls are at a 61-degree angle to the extension line of the center of the rotation limiting sleeve, which facilitates limiting the rotation angle of the rotation limiting sleeve by the rotation limiting block, and ultimately limits the cutting angle of the carbon rod body.

[0014] Furthermore, the support base is equipped with a sliding rail located below the horizontally moving base. The bottom of the horizontally moving base extends into the sliding rail, and moves closer to or further away from the cutter under the constraint of the sliding rail.

[0015] Furthermore, a cutting bracket is provided on the support base, and the cutter is driven to rotate by a cutting drive motor mounted on the cutting bracket. The extension surface of the cutter is perpendicular to the carbon rod body.

[0016] Furthermore, the moving distance limiting block is a cylindrical block that extends horizontally toward the V-shaped limiting base plate. The bottom of the moving distance limiting block is provided with a support block located at the outer end of the moving slide rail. The support block is fixedly connected to the bracket seat. When the cutter cuts to the center position of the top of the carbon rod body in the horizontal direction, the end of the moving distance limiting block near the V-shaped limiting base plate abuts against the transverse outer wall of the V-shaped limiting base plate.

[0017] By adopting the above technical solution, this utility model can also bring the following beneficial effects:

[0018] 1. This utility model discloses a carbon rod 61-degree cutting and fixing clamping device, which fixes the carbon rod body by a V-shaped limiting base plate and a flip limiting rod, limits the rotation angle of the carbon rod body by rotating the limiting sleeve, cuts the carbon rod body at the corresponding angle by a cutter, limits the cutting angle of the cutter on the carbon rod body by rotating the limiting block by the shape and angle, and adjusts the position of the carbon rod body by a horizontally moving base, a moving slide rail and a moving distance limiting block, thereby facilitating the cutting of the carbon rod body by the cutter. It has the advantages of simple structure, convenient operation, ability to cut carbon rods at 61 degrees and high cutting accuracy.

[0019] 2. This utility model discloses a carbon rod 61-degree cutting and fixing clamping device. The connecting buckle facilitates the detachable connection between the flip-limiting rod and the horizontally moving base. The moving push rod and moving slide rail facilitate the horizontal movement of the base position. The connecting long rod and connecting nut facilitate the use of the connecting buckle. The cutting long groove and the limiting long groove facilitate the cutting blade to enter the V-shaped limiting base plate and the flip-limiting rod, so that the V-shaped limiting base plate and the flip-limiting rod do not affect the cutting blade's cutting of the carbon rod body. It has the advantages of easy disassembly, high cutting efficiency, low risk of damage, and suitability for large-scale promotion. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This utility model provides a structural schematic diagram of a carbon rod 61-degree cutting and fixing clamping device;

[0022] Figure 2 This is a schematic diagram of the connection structure between the rotation limiting block and the V-shaped limiting base plate before the carbon rod body rotates in this embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the connection structure between the rotation limiting block and the V-shaped limiting base plate after the carbon rod body rotates in this embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the rotating limiting sleeve in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the transverse cross-sectional structure of the carbon rod body after it has been cut in this embodiment of the present invention;

[0026] 1. Support base; 2. Cutter; 3. Horizontal moving base; 4. V-shaped limiting base plate; 5. Flip limiting rod; 6. Connecting buckle; 7. Moving distance limiting block; 8. Carbon rod body; 9. Cutting long groove; 10. Rotating limiting sleeve; 11. Rotating limiting block; 12. Moving push rod; 13. Connecting long rod; 14. Connecting nut; 15. Support plate; 16. Limiting long groove; 17. Moving slide rail; 18. Cutting bracket; 19. Support block. Detailed Implementation

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. This utility model can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0030] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0032] In one embodiment of this utility model, such as Figures 1 to 5As shown, a carbon rod 61-degree cutting and fixing clamping device is disposed between a support base 1 and a cutter 2 located on the support base 1. It includes a horizontally moving base 3, a V-shaped limiting base plate 4, a flip-limiting rod 5, a connecting buckle 6 located at the end of the flip-limiting rod 5, and a moving distance limiting block 7. The horizontally moving base 3 is disposed on the support base 1 and moves horizontally towards and away from the cutter 2 under the support of the support base 1. The V-shaped limiting base plate 4 is disposed perpendicular to the horizontally moving base 3 in the horizontal direction, and has internally arranged commensurate extending... A carbon rod body 8 is covered by a flip-limiting rod 5 perpendicular to the carbon rod body 8, which covers the V-shaped limiting base plate 4 to limit the position of the carbon rod body 8. A connecting buckle 6 is set on the horizontal moving base 3 to ensure a detachable connection between the flip-limiting rod 5 and the horizontal moving base 3. The flip-limiting rod 5 is provided with a cutting groove 9 facing the cutter 2 and allowing the cutter 2 to pass through. A rotating limiting sleeve 10 is fitted on the carbon rod body 8. The rotation of the rotating limiting sleeve 10 within the V-shaped limiting base plate 4 limits the cutting angle of the cutter 2. Two rotating limiting sleeves 10 are respectively fitted on the two ends of the carbon rod body 8 and are located on both sides of the flip-limiting rod 5. A rotating limiting block 11 is provided on the outer ring of the rotating limiting sleeve 10. The rotating limiting block 11 rotates and abuts against different inner side walls of the V-shaped limiting base plate 4, thereby adjusting the cutting angle of the carbon rod body 8.

[0033] A moving push rod 12 is provided at one end of the horizontal moving base 3 away from the moving distance limiting block 7. The moving push rod 12 extends laterally and is located at the outer end of the V-shaped limiting base plate 4. The moving position of the horizontal moving base 3 is adjusted by the moving push rod 12. The connecting buckle 6 includes a vertically extending connecting rod 13. The bottom of the connecting rod 13 is rotatably connected to the horizontal moving base 3, and the top of the connecting rod 13 passes through the end of the flip limiting rod 5. The connecting rod 13 and the flip limiting rod 5 are fixed by a connecting nut 14 provided at the top of the connecting rod 13. The connecting nut 14 is threadedly matched with the threaded part provided at the top of the connecting rod 13. The moving push rod 12 is located on the outer side of the connecting rod 13 in the horizontal direction and does not affect the rotation of the connecting rod 13. The V-shaped limiting base plate 4 includes two support plates 15 with their bottoms close to each other. The two support plates 15 are arranged parallel to each other, and each support plate 15 has a limiting groove 16 located below the cutting groove 9 and extending in the same direction. This allows the bottom of the cutter 2 to enter the limiting groove 16 and cut the carbon rod body 8. The outer wall of the rotating limiting block 11 is an arc-shaped sidewall with the same center and arc as the rotating limiting sleeve 10. Both lateral outer walls of the rotating limiting block 11 extend towards the center of the rotating limiting sleeve 10. The extension line of the two lateral outer walls relative to the center of the rotating limiting sleeve 10 forms a 61-degree angle, which facilitates the limitation of the rotation angle of the rotating limiting sleeve 10 by the rotating limiting block 11, and ultimately limits the cutting angle of the carbon rod body 8. When a full-angle cut is required, the rotating limiting sleeve 10 can be removed, and the carbon rod body 8 can be completely cut by rotating it at full angle.

[0034] The support base 1 is provided with a sliding rail 17 located below the horizontally movable base 3. The bottom of the horizontally movable base 3 extends into the sliding rail 17 and moves closer to or further away from the cutter 2 under the constraint of the sliding rail 17. The support base 1 is provided with a cutting bracket 18. The cutter 2 is driven to rotate by a cutting drive motor provided on the cutting bracket 18. The extension surface of the cutter 2 is perpendicular to the carbon rod body 8.

[0035] The moving distance limit block 7 is set on the side of the horizontal moving base 3 near the cutting side, which limits the maximum distance that the horizontal moving base 3 can move in the direction of the cutter 2. When the horizontal moving base 3 moves to the position of the moving distance limit block 7, the cutter 2 extends into the cutting groove 9 and cuts to the center position of the top of the carbon rod body 8 in the horizontal direction.

[0036] The moving distance limiting block 7 is a cylindrical block that extends horizontally toward the V-shaped limiting base plate 4. The bottom of the moving distance limiting block 7 is provided with a support block 19 located at the outer end of the moving slide rail 17. The support block 19 is fixedly connected to the bracket seat 1. When the cutter 2 cuts to the top of the carbon rod body 8 at the center position in the horizontal direction, the end of the moving distance limiting block 7 near the V-shaped limiting base plate 4 abuts against the transverse outer wall of the V-shaped limiting base plate 4.

[0037] In use, the carbon rod body 8 is first fixed by the V-shaped limiting base plate 4 and the flipping limiting rod 5. The connecting buckle 6 facilitates the detachable connection between the flipping limiting rod 5 and the horizontal moving base 3. The connecting rod 13 and the connecting nut 14 facilitate the use of the connecting buckle 6. Then, the rotating limiting block 11 flips onto the support plate 15 near the cutter 2. The moving push rod 12 drives the horizontal moving base 3 to move closer to the cutter 2, stopping when it abuts against the corresponding outer wall of the V-shaped limiting base plate 4 and stops. During this movement, the cutter 2 uses the cutting groove 9 and the limiting groove 16 to facilitate its entry into the V-shaped limiting base plate 4 and the flipping limiting rod 5, ensuring that the V-shaped limiting base plate 4 and the flipping limiting rod 5 do not interfere with the cutter 2's cutting of the carbon rod body 8. Then, the cutter 2 cuts the carbon rod body 8 at the corresponding angle. After cutting, the push rod 12 is moved to reset in the reverse direction, and the rotating limit block 11 is flipped onto the support plate 15 away from the cutter 2. The process of moving the base 3 horizontally closer to the cutter 2 is repeated, and the cutter 2 completes the cutting of another part of the carbon rod body 8. The rotation of the rotating limit block 11 ensures the cutting angle of the carbon rod body 8. After cutting, the push rod 12 is moved to reset in the reverse direction again. When full-angle cutting is required, the rotating limit sleeve 10 is removed. The carbon rod body 8 can be completely cut by rotating it at full angle. When full-angle cutting of carbon rod bodies 8 is required in batches, the cutting depth of the cutter 2 can be adjusted by removing the moving distance limit block 7, thereby improving the cutting efficiency of the full-angle carbon rod body 8. In summary, this utility model has the advantages of simple structure, convenient operation, low processing cost, high cutting efficiency, good cutting effect, ability to cut at special angles, and suitability for automated production.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A carbon rod 61 degree cutting fixed clamping device arranged between a support seat (1) and a cutter (2) located on the support seat (1), characterized in that: The device includes a horizontally movable base (3), a V-shaped limiting base plate (4), a flip-limiting rod (5), a connecting buckle (6) located at the end of the flip-limiting rod (5), and a moving distance limiting block (7). The horizontally movable base (3) is mounted on a support base (1) and moves horizontally towards and away from the cutter (2) under the support of the support base (1). The V-shaped limiting base plate (4) is set perpendicular to the horizontally movable base (3) in the horizontal direction. A carbon rod body (8) extending in the same direction is provided inside the V-shaped limiting base plate (4). The flip-limiting rod (5) extends perpendicular to the carbon rod body (8). The direction of the ) covers the top of the V-shaped limiting base plate (4) and limits the position of the carbon rod body (8). The connecting buckle (6) is set on the horizontal moving base (3). The connecting buckle (6) ensures the detachable connection between the flip limiting rod (5) and the horizontal moving base (3). The flip limiting rod (5) is provided with a cutting groove (9) facing the cutter (2) and allowing the cutter (2) to pass through. The carbon rod body (8) is fitted with a rotating limiting sleeve (10). The rotation of the rotating limiting sleeve (10) in the V-shaped limiting base plate (4) limits the cutting angle of the cutter (2).

2. A carbon rod 61 degree cutting fixture as claimed in claim 1, characterized in that: The two rotating limiting sleeves (10) are respectively fitted on the two ends of the carbon rod body (8) and are located on both sides of the flip limiting rod (5). The outer ring of the rotating limiting sleeve (10) is provided with a rotating limiting block (11). The rotating limiting block (11) rotates and abuts against different inner walls of the V-shaped limiting base plate (4), thereby adjusting the cutting angle of the carbon rod body (8).

3. A carbon rod 61 degree cutting fixture as claimed in claim 2, wherein: The moving distance limiting block (7) is set on the side of the horizontal moving base (3) close to the cutting side, limiting the maximum distance that the horizontal moving base (3) moves in the direction of the cutter (2). When the horizontal moving base (3) moves to the position of the moving distance limiting block (7), the cutter (2) extends into the cutting groove (9) and cuts to the center position of the top of the carbon rod body (8) in the horizontal direction.

4. A carbon rod 61 degree cutting fixture as claimed in claim 3, wherein: A moving push rod (12) is provided at one end of the horizontal moving base (3) away from the moving distance limiting block (7). The moving push rod (12) extends laterally and is located at the outer end of the V-shaped limiting base plate (4). The moving position of the horizontal moving base (3) is adjusted by the moving push rod (12).

5. The carbon rod 61-degree cutting and fixing clamping device as described in claim 4, characterized in that: The connecting buckle (6) includes a vertically extending connecting rod (13). The bottom of the connecting rod (13) is rotatably connected to the horizontally movable base (3). The top of the connecting rod (13) passes through the end of the flip-limiting rod (5). The connecting rod (13) and the flip-limiting rod (5) are fixed by a connecting nut (14) set on the top of the connecting rod (13). The connecting nut (14) is threadedly matched with the threaded part set on the top of the connecting rod (13). The moving push rod (12) is located on the outside of the connecting rod (13) in the horizontal direction and does not affect the rotation of the connecting rod (13).

6. A carbon rod 61 degree cutting fixture as claimed in claim 5, wherein: The V-shaped limiting base plate (4) includes two support plates (15) with their bottoms close to each other. The two support plates (15) are arranged parallel to each other. The two support plates (15) are provided with limiting grooves (16) located below the cutting groove (9) and extending in the same direction, so that the bottom of the cutter (2) can enter the limiting groove (16) to cut the carbon rod body (8).

7. A carbon rod 61 degree cutting fixture as claimed in claim 6, wherein: The outer side wall of the rotation limiting block (11) is an arc-shaped side wall with the same center and arc as the rotation limiting sleeve (10). The two lateral outer side walls of the rotation limiting block (11) extend toward the center of the rotation limiting sleeve (10). The extension lines of the two lateral outer side walls relative to the center of the rotation limiting sleeve (10) are at 61 degrees, which makes it convenient to limit the rotation angle of the rotation limiting sleeve (10) by the rotation limiting block (11), and finally limit the cutting angle of the carbon rod body (8).

8. A carbon rod 61 degree cutting fixture as claimed in claim 7, wherein: The support base (1) is provided with a sliding rail (17) located below the horizontal sliding base (3). The bottom of the horizontal sliding base (3) extends into the sliding rail (17) and moves closer to and further away from the cutter (2) under the restriction of the sliding rail (17).

9. A carbon rod 61 degree cutting fixture as claimed in claim 8, wherein: A cutting bracket (18) is provided on the bracket base (1). The cutter (2) is driven to rotate by a cutting drive motor provided on the cutting bracket (18). The extension surface of the cutter (2) is perpendicular to the carbon rod body (8).

10. A carbon rod 61 degree cutting fixture as claimed in claim 9, wherein: The moving distance limiting block (7) is a cylindrical block that extends horizontally toward the V-shaped limiting base plate (4). The bottom of the moving distance limiting block (7) is provided with a support block (19) located at the outer end of the moving slide rail (17). The support block (19) is fixedly connected to the bracket seat (1). When the cutter (2) cuts to the top of the carbon rod body (8) at the center position in the horizontal direction, the end of the moving distance limiting block (7) near the V-shaped limiting base plate (4) abuts against the transverse outer wall of the V-shaped limiting base plate (4).