Carbon rod clamping turning and cutting integrated machining device

Abstract

The utility model relates to a kind of carbon rod clamping turning cutting integrated machining equipment, including carbon rod main body, cutting turning mechanism, bottom support frame and end positioning mechanism, end positioning mechanism is positioned to the horizontal both ends of carbon rod main body, cutting turning mechanism includes transverse adjusting base, cutting tool, cutting tool and middle clamping fixing device, transverse adjusting base is located inside transverse adjusting track, can be limited under the position adjustment of transverse and longitudinal of bottom support frame, cutting tool and cutting tool are all set on transverse adjusting base, and respectively located the transverse both sides of carbon rod main body, middle clamping fixing device includes support platform, clamping gripper, the clamping cylinder of driving clamping gripper closure, horizontal adjusting base is provided with the scrap collecting box below carbon rod main body, in general the utility model has the advantages of high processing efficiency, high processing cost, good carbon rod fixing effect, carbon rod is not easy to break, small to environment pollution and function diversification.

Description

Technical Field

[0001] This utility model belongs to the technical field of carbon rod processing equipment, specifically relating to an integrated processing equipment for carbon rod clamping, turning, and cutting. Background Technology

[0002] The cutting and turning of carbon rods require the selection of appropriate processing methods based on their intended use to ensure accuracy and avoid breakage. Currently, the cutting and turning processes of carbon rods are carried out separately using different equipment. Simply combining cutting and turning equipment not only leads to operational difficulties but also easily affects processing accuracy. Some equipment uses CNC to perform simultaneous cutting and turning processes, but its structure is very complex and its cost is very high. In addition, the original method is still used to fix the carbon rods during processing, which easily causes the carbon rods to break. Furthermore, the debris generated during processing is not treated in any way, which can easily cause environmental pollution.

[0003] A utility model patent with application number "CN202421569053.0" entitled "A Graphite Carbon Rod Cutting Machine for Graphite Production and Processing" mentions "a graphite carbon rod cutting machine for graphite production and processing, including a base, a clamping mechanism disposed at the front end of the placement base, the clamping mechanism including clamping frames disposed on the upper and lower sides of the front end of the placement base, a cutting groove formed in the middle of the clamping frames, a clamping groove formed in the middle of the side of the clamping frames that are close to each other, a rubber pad fixedly connected to one side of the clamping groove, and a moving mechanism disposed on the clamping frames, the moving mechanism including a fixing rod fixedly connected to both sides of the clamping frames." This utility model is similar to... The advantages of existing technologies are: when the graphite carbon rod is cut, the front and rear of the cutting position are stably clamped by the clamping frame, which can ensure the stability and quality of the cutting. The cylinder drives the push plate to descend to the rear end of the graphite carbon rod to push the graphite carbon rod, which makes it easier for the operator to place the graphite carbon rod and is convenient to use. However, it does not have a turning function, so its function is relatively simple. Moreover, the clamping process only targets the two ends of the carbon rod. When the carbon rod is long, it is very easy to break the carbon rod during the cutting process. In addition, the debris generated during the carbon rod cutting process is not collected, which is not suitable for environmental protection and large-scale promotion.

[0004] Therefore, there is an urgent need for a carbon rod clamping, turning, and cutting integrated processing equipment that can address the current lack of a corresponding low-cost integrated turning and cutting equipment, and solve the existing problems of low processing efficiency, high cost, poor carbon rod fixation, easy breakage of carbon rods, and lack of collection of carbon rod debris. Summary of the Invention

[0005] In view of this, this utility model proposes an integrated processing equipment for carbon rod clamping, turning and cutting, which is applied to the field of carbon rod processing equipment technology and solves the existing technical problems of low processing efficiency, high cost, poor fixation effect of carbon rod, easy breakage of carbon rod and lack of collection of carbon rod debris.

[0006] To achieve the above-mentioned technical objectives, the specific technical solution adopted by this utility model is as follows: A carbon rod clamping, turning, and cutting integrated processing equipment includes a carbon rod body, a cutting and turning mechanism, a bottom support frame, and an end positioning mechanism. The end positioning mechanism limits the horizontal positions of both ends of the carbon rod body. The bottom support frame is equipped with a horizontal adjustment track and a horizontal adjustment base located on the horizontal adjustment track. The horizontal adjustment base is equipped with a transverse adjustment track. The cutting and turning mechanism includes a transverse adjustment base, a cutter, a cutting tool, and a central clamping and fixing device. The transverse adjustment base is located inside the transverse adjustment track and can be adjusted laterally and longitudinally under the constraint of the bottom support frame. The cutter and cutting tool are both set on the transverse adjustment base and are located on the lateral sides of the carbon rod body, respectively. The central clamping and fixing device includes a support platform, a clamping gripper, and a clamping cylinder for driving the clamping gripper to close. The bottom of the support platform extends along the direction of the horizontal adjustment track to the outside of the transverse adjustment base. The bottom of the support platform is fixedly connected to the horizontal adjustment base set on the horizontal adjustment track. A debris collection box is set on the horizontal adjustment base below the carbon rod body. The debris collection box is fixed inside the horizontal adjustment base to collect debris generated during the cutting or turning of the carbon rod body.

[0007] Furthermore, both the cutting and turning mechanism and the end positioning mechanism are mounted on the bottom support frame. The end positioning mechanism includes a mechanical fixing chuck and a mechanical fixing ejector pin. Both the mechanical fixing chuck and the mechanical fixing ejector pin are horizontally positioned and fix the horizontal ends of the carbon rod body respectively. A chuck support frame is provided at the bottom of the mechanical fixing chuck, and the bottom of the chuck support frame is fixedly connected to the bottom support frame. An ejector pin support frame is provided at the bottom of the mechanical fixing ejector pin, and the ejector pin support frame is located inside the horizontal adjustment track, at the lateral outer end of the carbon rod body, near and away from the carbon rod body, along the extension direction of the carbon rod body.

[0008] Furthermore, the bottom of the horizontal adjustment base is slidably connected to the horizontal adjustment track and moves along the horizontal adjustment track in a direction perpendicular to the horizontal adjustment track. The horizontal adjustment base can follow the horizontal adjustment track to adjust its longitudinal position on the horizontal adjustment track under the drive of the horizontal adjustment base.

[0009] Furthermore, the clamping gripper is equipped with two limiting grippers that can move closer to or further away from each other, and the clamping cylinder is positioned above the carbon rod body, thereby limiting the position of the middle part of the carbon rod body through the top of the support platform, the limiting grippers, and the bottom of the clamping cylinder.

[0010] Furthermore, both limit grippers are vertically positioned, and each limit gripper has a connecting rod at its top. Each clamping cylinder has two drive ends corresponding to the positions of the limit grippers. The drive end of each clamping cylinder is fixedly connected to the limit gripper via the corresponding connecting rod, thereby causing the clamping gripper to close.

[0011] Furthermore, both the cutter and the shaving blade are set perpendicular to the carbon rod body, and move closer to or further away from the carbon rod body under the action of the horizontal adjustment base.

[0012] Furthermore, the connection point between the support platform and the horizontal adjustment base is located on the side of the horizontal adjustment base away from the cutter and the shaving blade.

[0013] Furthermore, a cutting support frame is provided below the cutter, and the cutting support frame is fixedly connected to the bottom of the horizontal adjustment base. A horizontal drive motor is provided at the outer horizontal end of the horizontal adjustment base and is fixedly connected to the horizontal adjustment base. The horizontal drive motor is located in the outer horizontal direction of the cutting support frame and above the corresponding horizontal adjustment track. The horizontal drive motor drives the horizontal adjustment base to adjust its horizontal position inside the horizontal adjustment track by being fixedly connected to the horizontal adjustment base.

[0014] Furthermore, a turning support frame is provided below the cutting tool. The cutting tool is detachably connected to a limiting groove provided on the top of the turning support frame. The turning support frame is set on a turning adjustment rail located on the lateral adjustment base. The turning adjustment rail is located below the clamping gripper and the top of the support table, thereby adjusting the lateral position of the turning support frame on the lateral adjustment base.

[0015] Furthermore, the ejector support frame is equipped with an ejector drive cylinder at the outer end along the horizontal adjustment track direction. The drive end of the ejector drive cylinder passes through the ejector support frame and is fixedly connected to the mechanically fixed ejector. The ejector drive cylinder drives the mechanically fixed ejector to press against the horizontal outer section of the carbon rod body to fix the carbon rod body.

[0016] By adopting the above technical solution, this utility model can also bring the following beneficial effects: 1. This utility model discloses an integrated processing equipment for carbon rod clamping, turning, and cutting. The carbon rod body is fixed at both ends by a mechanical chuck and a mechanical fixing pin. The middle part of the carbon rod body is positioned by the top of the support platform, the limiting gripper, and the bottom of the clamping cylinder, which prevents the carbon rod body from shifting during processing and reduces the risk of damage to the carbon rod body. This facilitates the cutting and turning of the carbon rod body by the cutting tool and the shaving tool. It has the advantages of simple structure, convenient operation, high processing efficiency, good fixation effect on carbon rod, and carbon rod is not easily damaged. It is also suitable for large-scale promotion.

[0017] 2. This utility model discloses a carbon rod clamping, turning, and cutting integrated processing equipment. The cutting and turning mechanism and the end positioning mechanism are supported by a bottom support frame. The horizontal position of the cutting and turning mechanism and the carbon rod body is adjusted by a horizontal adjustment track, a horizontal adjustment base, a transverse adjustment track, and a transverse adjustment base. The position of the transverse adjustment base moves the cutting blade and the cutting tool closer to and further away from the carbon rod body, facilitating the cutting and turning of the carbon rod body. The debris collection box collects the debris generated during the cutting and turning process, preventing environmental pollution. It has the advantages of diversified functions, low processing cost, simultaneous cutting and turning operations, low environmental pollution, and high degree of automation. Attached Figure Description

[0018] 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.

[0019] Figure 1 This utility model provides a structural schematic diagram of a carbon rod clamping, turning, and cutting integrated processing equipment; Figure 2 As an embodiment of this utility model Figure 1 Top view (excluding the central clamping and fixing device); Figure 3 This is a schematic diagram of the connection structure between the clamping cylinder and the clamping gripper in an embodiment of this utility model; 1. Bottom support frame; 2. Horizontal adjustment rail; 3. Horizontal adjustment base; 4. Lateral adjustment rail; 5. Lateral adjustment base; 6. Cutting blade; 7. Shaving blade; 8. Support platform; 9. Clamping gripper; 10. Clamping cylinder; 11. Debris collection box; 12. Mechanical fixed chuck; 13. Mechanical fixed ejector pin; 14. Chuck support frame; 15. Ejector pin support frame; 16. Limiting gripper; 17. Connecting rod; 18. Cutting support frame; 19. Lateral drive motor; 20. Turning support frame; 21. Turning adjustment rail; 22. Ejector pin drive cylinder. Detailed Implementation

[0020] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] 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.

[0022] 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.

[0023] 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 the actual implementation. In the 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.

[0024] 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.

[0025] In one embodiment of this utility model, such as Figures 1 to 3As shown, a carbon rod clamping, turning, and cutting integrated processing equipment includes a carbon rod body, a cutting and turning mechanism, a bottom support frame 1, and an end positioning mechanism. The end positioning mechanism limits the position of the two horizontal ends of the carbon rod body. The bottom support frame 1 is provided with a horizontal adjustment rail 2 and a horizontal adjustment base 3 located on the horizontal adjustment rail 2. The horizontal adjustment base 3 is provided with a transverse adjustment rail 4. The cutting and turning mechanism includes a transverse adjustment base 5, a cutter 6, a cutting blade 7, and a middle clamping and fixing device. The transverse adjustment base 5 is located inside the transverse adjustment rail 4 and can be adjusted laterally and longitudinally under the constraint of the bottom support frame 1. The cutter 6... Both the cutting blade 7 and the cutting tool 7 are mounted on the horizontal adjustment base 5 and are located on the horizontal sides of the carbon rod body respectively. The middle clamping and fixing device includes a support platform 8, a clamping gripper 9, and a clamping cylinder 10 that drives the clamping gripper 9 to close. The bottom of the support platform 8 extends to the outside of the horizontal adjustment base 5 along the direction of the horizontal adjustment track 2. The bottom of the support platform 8 is fixedly connected to the horizontal adjustment base 3 mounted on the horizontal adjustment track 2. A chip collection box 11 located below the carbon rod body is mounted on the horizontal adjustment base 3. The chip collection box 11 is fixed inside the horizontal adjustment base 3 to collect the chips generated by the carbon rod body during cutting or turning.

[0026] Both the cutting and turning mechanism and the end positioning mechanism are mounted on the bottom support frame 1. The end positioning mechanism includes a mechanically fixed chuck 12 and a mechanically fixed ejector pin 13. Both the mechanically fixed chuck 12 and the mechanically fixed ejector pin 13 are horizontally arranged and fix the horizontal ends of the carbon rod body respectively. A chuck support frame 14 is provided at the bottom of the mechanically fixed chuck 12, and the bottom of the chuck support frame 14 is fixedly connected to the bottom support frame 1. An ejector pin support frame 15 is provided at the bottom of the mechanically fixed ejector pin 13. The ejector pin support frame 15 is located inside the horizontal adjustment track 2, at the lateral outer end of the carbon rod body along its extension direction. The bottom of the lateral adjustment base 5 is slidably connected to the lateral adjustment track 4 and moves along the lateral adjustment track 4 in a direction perpendicular to the horizontal adjustment track 2. The lateral adjustment base 5 can be adjusted longitudinally on the horizontal adjustment track 2 by following the lateral adjustment track 4 under the action of the horizontal adjustment base 3.

[0027] The clamping gripper 9 is equipped with two limiting grippers 16 that can move closer to or further away from each other. The clamping cylinder 10 is positioned above the carbon rod body, thereby limiting the position of the middle part of the carbon rod body through the top of the support platform 8, the limiting grippers 16, and the bottom of the clamping cylinder 10. Both limiting grippers 16 are vertically arranged, and each limiting gripper 16 has a connecting rod 17 at its top. The clamping cylinder 10 has two drive ends corresponding to the positions of the limiting grippers 16. Each drive end of the clamping cylinder 10 is fixedly connected to the limiting gripper 16 through the corresponding connecting rod 17, thereby driving the clamping gripper 9 to close through the clamping cylinder 10. The ejector support frame 15 is provided with an ejector drive cylinder 22 at the outer end along the direction of the horizontal adjustment track 2. The drive end of the ejector drive cylinder 22 passes through the ejector support frame 15 and is fixedly connected to the mechanically fixed ejector 13. The ejector drive cylinder 22 drives the mechanically fixed ejector 13 to press against the horizontal outer section of the carbon rod body to fix the carbon rod body.

[0028] Both the cutter 6 and the shaving blade 7 are perpendicular to the carbon rod body and move closer to or further away from the carbon rod body under the action of the horizontal adjustment base 5. The support platform 8 is connected to the horizontal adjustment base 3 on the side of the horizontal adjustment base 5 away from the cutter 6 and the shaving blade 7. A cutting support frame 18 is provided below the cutter 6 and is fixedly connected to the bottom of the horizontal adjustment base 5. A horizontal drive motor 19 is provided at the outer horizontal end of the horizontal adjustment base 5 and is fixedly connected to the horizontal adjustment base 3. The horizontal drive motor 19 is located in the outer horizontal direction of the cutting support frame 18 and above the corresponding horizontal adjustment track 4. The horizontal drive motor 19 drives the horizontal adjustment base 5 to adjust its horizontal position within the horizontal adjustment track 4 through its fixed connection with the horizontal adjustment base 5. A turning support frame 20 is provided below the cutting tool 7. The cutting tool 7 is detachably connected to the limiting groove provided on the top of the turning support frame 20. The turning support frame 20 is provided on the turning adjustment rail 21 located on the transverse adjustment base 5. The turning adjustment rail 21 is located below the clamping gripper 9 and the top of the support table 8, thereby adjusting the transverse position of the turning support frame 20 on the transverse adjustment base 5.

[0029] In use, this invention first determines whether the carbon rod body will be cut or turned. Then, the position of the horizontal adjustment base 3 is adjusted. Next, the two ends of the carbon rod body are fixed by the mechanical fixing chuck 12 and the mechanical fixing pin 13. Then, driven by the clamping cylinder 10, the middle part of the carbon rod body is clamped by the cutting and turning mechanism. Then, the pin drive cylinder 22 is adjusted to complete the tight clamping of the carbon rod body. Then, the horizontal drive motor 19 drives the position of the horizontal adjustment base 5 so that the cutter 6 and the shaving blade 7 are close to or away from the carbon rod body as needed. When the cutter 6 is close to the carbon rod body, cutting can be performed. When the shaving blade 7 is close to the carbon rod, turning can be performed. The debris generated during cutting or turning is collected by the debris collection box 11. In summary, this invention has the advantages of high processing efficiency, high processing cost, good fixing effect on carbon rods, carbon rods are not easily damaged, low environmental pollution, and multiple functions.

[0030] 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 clamping, turning, and cutting integrated processing equipment, characterized in that: The device includes a carbon rod body, a cutting and turning mechanism, a bottom support frame (1), and an end positioning mechanism. The end positioning mechanism limits the horizontal positions of the two ends of the carbon rod body. The bottom support frame (1) is provided with a horizontal adjustment rail (2) and a horizontal adjustment base (3) located on the horizontal adjustment rail (2). The horizontal adjustment base (3) is provided with a transverse adjustment rail (4). The cutting and turning mechanism includes a transverse adjustment base (5), a cutter (6), a shaving blade (7), and a central clamping and fixing device. The transverse adjustment base (5) is located inside the transverse adjustment rail (4) and can be adjusted horizontally and vertically under the constraint of the bottom support frame (1). The cutter (6) and the shaving blade (7) are both located on the bottom support frame (1). On the horizontal adjustment base (5), and located on both sides of the carbon rod body, the middle clamping and fixing device includes a support platform (8), a clamping gripper (9), and a clamping cylinder (10) for driving the clamping gripper (9) to close. The bottom of the support platform (8) extends along the direction of the horizontal adjustment track (2) to the outside of the horizontal adjustment base (5). The bottom of the support platform (8) is fixedly connected to the horizontal adjustment base (3) set on the horizontal adjustment track (2). The horizontal adjustment base (3) is provided with a debris collection box (11) located below the carbon rod body. The debris collection box (11) is fixed inside the horizontal adjustment base (3) to collect the debris generated by the carbon rod body during cutting or turning.

2. The carbon rod clamping, turning, and cutting integrated processing equipment as described in claim 1, characterized in that: The cutting and turning mechanism and the end positioning mechanism are both set on the bottom support frame (1). The end positioning mechanism includes a mechanical fixed chuck (12) and a mechanical fixed ejector pin (13). The mechanical fixed chuck (12) and the mechanical fixed ejector pin (13) are both set horizontally and fix the horizontal ends of the carbon rod body respectively. The bottom of the mechanical fixed chuck (12) is provided with a chuck support frame (14). The bottom of the chuck support frame (14) is fixedly connected to the bottom support frame (1). The bottom of the mechanical fixed ejector pin (13) is provided with an ejector pin support frame (15). The ejector pin support frame (15) is set inside the horizontal adjustment track (2) at the lateral outer end that is close to and away from the carbon rod body along the extension direction of the carbon rod body.

3. The carbon rod clamping, turning, and cutting integrated processing equipment as described in claim 2, characterized in that: The bottom of the horizontal adjustment base (5) is slidably connected to the horizontal adjustment track (4) and moves along the horizontal adjustment track (4) in a direction perpendicular to the horizontal adjustment track (2). The horizontal adjustment base (5) can follow the horizontal adjustment track (4) and adjust its longitudinal position on the horizontal adjustment track (2) under the drive of the horizontal adjustment base (3).

4. The carbon rod clamping, turning, and cutting integrated processing equipment as described in claim 3, characterized in that: The clamping gripper (9) is provided with two limiting grippers (16) that can move closer to or further away from each other. The clamping cylinder (10) is located above the carbon rod body, thereby limiting the position of the middle part of the carbon rod body through the top of the support platform (8), the limiting grippers (16) and the bottom of the clamping cylinder (10).

5. The carbon rod clamping, turning, and cutting integrated processing equipment as described in claim 4, characterized in that: Both limit grippers (16) are vertically arranged, and each limit gripper (16) has a connecting rod (17) at its top. The clamping cylinder (10) is provided with two driving ends corresponding to the positions of the limit grippers (16). The driving end of each clamping cylinder (10) is fixedly connected to the limit gripper (16) through the corresponding connecting rod (17), thereby driving the clamping gripper (9) to close through the clamping cylinder (10).

6. The carbon rod clamping, turning, and cutting integrated processing equipment as described in claim 5, characterized in that: The cutter (6) and the shaving blade (7) are both set perpendicular to the carbon rod body and move closer to and further away from the carbon rod body under the action of the horizontal adjustment base (5).

7. The carbon rod clamping, turning, and cutting integrated machining equipment as described in claim 6, characterized in that: The connection point between the support platform (8) and the horizontal adjustment base (3) is located on the side of the horizontal adjustment base (5) away from the cutter (6) and the shaving blade (7).

8. The carbon rod clamping, turning, and cutting integrated processing equipment as described in claim 7, characterized in that: A cutting support frame (18) is provided below the cutter (6). The cutting support frame (18) is fixedly connected to the bottom of the horizontal adjustment base (5). A horizontal drive motor (19) is provided at the outer horizontal end of the horizontal adjustment base (5) and is fixedly connected to the horizontal adjustment base (3). The horizontal drive motor (19) is located in the outer horizontal direction of the cutting support frame (18) and above the corresponding horizontal adjustment track (4). The horizontal drive motor (19) drives the horizontal adjustment base (5) to adjust its horizontal position inside the horizontal adjustment track (4) by being fixedly connected to the horizontal adjustment base (5).

9. The carbon rod clamping, turning, and cutting integrated machining equipment as described in claim 8, characterized in that: A turning support frame (20) is provided below the cutting tool (7). The cutting tool (7) is detachably connected to a limiting groove provided on the top of the turning support frame (20). The turning support frame (20) is provided on a turning adjustment rail (21) located on a transverse adjustment base (5). The turning adjustment rail (21) is located below the top of the clamping gripper (9) and the support table (8), thereby adjusting the transverse position of the turning support frame (20) on the transverse adjustment base (5).

10. The carbon rod clamping, turning, and cutting integrated processing equipment as described in claim 9, characterized in that: The ejector pin support frame (15) is provided with an ejector pin drive cylinder (22) at the outer end along the direction of the horizontal adjustment track (2). The drive end of the ejector pin drive cylinder (22) passes through the ejector pin support frame (15) and is fixedly connected to the mechanically fixed ejector pin (13). The ejector pin drive cylinder (22) drives the mechanically fixed ejector pin (13) to press against the horizontal outer section of the carbon rod body to fix the carbon rod body.

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