A kind of drilling device for processing super-long graphite rod

Abstract

The utility model relates to a kind of drilling device for super-long graphite rod processing, including tool tip and the tool holder connected with tool tip. Tool tip is set to three-prism pyramid shape. Tool tip includes: first cutting edge, at least two first cutting edges are symmetrically arranged, and the edge of at least two first cutting edges forms first angle;Second cutting edge, at least four second cutting edges are axially symmetrically arranged, and the plane of at least two second cutting edges forms second angle with the plane of opposite at least two second cutting edges. Chip removal platform formed due to first angle and second angle not being identical is arranged between tool tip and tool holder. The utility model is set to three-prism pyramid shape tool tip, and adopts multi-angle cutting edge (with symmetrically arranged first cutting edge and axially symmetrically arranged second cutting edge), so that tool is more uniform in cutting process Stress, can effectively reduce cutting force and cutting torque, can further reduce cutting resistance and vibration, improve cutting efficiency and machining precision.

Description

Technical Field

[0001] This utility model relates to the field of graphite processing, and in particular to a drilling device for processing ultra-long graphite rods. Background Technology

[0002] Graphite rods, due to their unique physical and chemical properties such as high electrical and thermal conductivity, high temperature resistance, and corrosion resistance, are widely used in various fields, including heating elements for high-temperature vacuum furnaces, spacecraft thrusters, and fuel cell bipolar plates. However, the processing of ultra-long graphite rods presents many challenges, especially during drilling. Due to their long length and brittle material, they are prone to processing deformation, poor concentricity of the inner hole, and severe circular runout.

[0003] Traditional drilling equipment often suffers from the following problems when machining ultra-long graphite rods:

[0004] Low processing efficiency: It requires multiple operators to work together to support the graphite rod and push it into the cutting mechanism for processing.

[0005] Poor machining accuracy: Due to the long length of the graphite rod, it is easy for the machining process to be unstable, resulting in the machining not being on the same straight line.

[0006] Rapid tool wear: Graphite materials are relatively brittle, and the chips generated during processing tend to accumulate, leading to accelerated tool wear.

[0007] Insufficient cooling: The tool is prone to overheating during drilling, which affects the machining quality and tool life.

[0008] With the development of industrial technology, the requirements for processing precision and efficiency of ultra-long graphite rods are becoming increasingly stringent. While some existing drilling devices improve processing efficiency and precision through optimized structural design, they still cannot fully meet the processing needs of ultra-long graphite rods. Therefore, developing a drilling device specifically designed for ultra-long graphite rods to address the problems in existing technologies has become a key research focus.

[0009] In summary, this utility model provides a drilling device for machining ultra-long graphite rods, which aims to solve the problems of low machining efficiency, poor machining accuracy, and rapid tool wear in the prior art by optimizing the tool structure and cooling chip removal system, thereby improving the machining quality and efficiency of ultra-long graphite rods.

[0010] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this utility model, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that this utility model does not have the features of these prior art. On the contrary, this utility model has all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Utility Model Content

[0011] To address the shortcomings of existing technologies, this invention provides a drilling device for machining ultra-long graphite rods, comprising a cutting tip and a tool holder connected to the cutting tip. The cutting tip is configured in the shape of a triangular pyramid. The cutting tip includes: a first cutting edge, with at least two first cutting edges symmetrically arranged, and the edges of the at least two first cutting edges forming a first angle; and a second cutting edge, with at least four second cutting edges axially symmetrically arranged, and the plane containing at least two of the second cutting edges forming a second angle with the plane containing the opposite at least two second cutting edges. A chip removal platform is provided between the cutting tip and the tool holder, formed by the difference between the first and second angles. By configuring a triangular pyramid-shaped cutting tip and employing multi-angle cutting edges (with symmetrically arranged first cutting edges and axially symmetrically arranged second cutting edges), this invention makes the force on the tool more uniform during cutting, effectively reducing cutting force and cutting torque, further reducing cutting resistance and vibration, and improving cutting efficiency and machining accuracy.

[0012] According to a preferred embodiment, the chip removal table forms a chip removal groove with the first cutting edge and the second cutting edge. The chip removal table of this invention has chamfered edges on the contact surfaces with the main cutting face and the secondary cutting face. Utilizing the difference between the first and second angles, a smooth discharge channel is provided for the chips, optimizing the geometric clearance and ensuring that cutting chips can be discharged more smoothly, avoiding accumulation that affects machining quality.

[0013] According to a preferred embodiment, the tool holder is cylindrical, and its diameter is equal to the width of the tool tip. A platform is positioned on the side of the tool holder closest to the second cutting edge. In this invention, the maximum cutting edge width of the first cutting edge is preferably 14.8 mm. Therefore, this experimental apparatus can handle wider materials during cutting.

[0014] According to a preferred embodiment, the tool holder is hollow. An air vent connected to the hollow interior of the tool holder is provided on the side of the tool holder away from the tool tip. The air vent is used for cooling the tool tip after overheating during turning or drilling, or for cleaning chips to prevent chip accumulation and maintain machining quality.

[0015] According to a preferred embodiment, the hollow space of the tool holder extends to the connection point with the tool tip, and the hollow space extends in a direction perpendicular to the axis of the tool holder. This invention not only allows the material debris cut by the tool to be blown out through the air hole and discharged from the tool tip and tool holder position with the airflow to improve machining quality, but also removes heat generated by the tool tip during prolonged operation, extending the tool tip's service life.

[0016] According to a preferred embodiment, the tool holder has an opening on the side near the first cutting edge. At least two openings connect to the hollow space.

[0017] According to a preferred embodiment, the cutter head is fixed to the tool holder by being embedded into it. A chip removal table anchor is placed between the cutter head and the tool holder. The tool holder design of this invention provides a stable foundation, ensuring the stability of the drill bit during prolonged machining operations.

[0018] According to a preferred embodiment, a connecting post is provided at the end of the tool holder away from the tool head, and the connecting post is connected to a threaded connection structure.

[0019] According to a preferred embodiment, the device further includes a tool holder, the side of which near the tool holder has a threaded connection structure adapted to the tool holder. The threaded connection structure is hollow and communicates with an air blowing hole. The tool holder can be connected to the tool holder via threads to ensure a secure connection.

[0020] According to a preferred embodiment, the hollow tool holder is provided with an air blowing channel extending along its length, and the air blowing channel is connected to the air blowing hole of the tool holder. This utility model features a hollow tool holder design equipped with an air blowing hole, connected to the tool holder via the air blowing channel, forming a complete cooling and chip removal system. During drilling, compressed air enters the hollow space from the air blowing hole and flows radially along the tool tip. This not only blows out the cut chips, preventing chip accumulation, but also removes the heat generated at the tool tip during prolonged operation, effectively reducing tool temperature and extending tool life. Attached Figure Description

[0021] Figure 1 This is a front view of the connection between the blade tip and the blade holder according to a preferred embodiment of this utility model;

[0022] Figure 2 This is a left view of the connection between the blade tip and the blade holder in a preferred embodiment of this utility model;

[0023] Figure 3 This is a top view of the connection between the blade tip and the blade holder in a preferred embodiment of this utility model;

[0024] Figure 4 This is a simplified structural cross-sectional view of a preferred embodiment of the knife handle provided by this utility model;

[0025] Figure 5 This is a simplified structural cross-sectional view of a preferred embodiment of the tool holder provided by this utility model.

[0026] List of reference numerals

[0027] 1: Tool tip; 2: Tool holder; 3: Tool shank; 4: First cutting edge; 5: First angle; 6: Second cutting edge; 7: Second angle; 8: Chip removal table; 9: Chip removal groove; 10: Air blowing hole; 11: Opening; 12: Connecting post; 13: Air blowing channel; 14: Main cutting face; 15: Secondary cutting face; 16: Third angle. Detailed Implementation

[0028] The following is a detailed explanation with reference to the accompanying drawings.

[0029] Example 1

[0030] This utility model provides a drilling device for processing ultra-long graphite rods, such as... Figure 1 and Figure 2 As shown, the tool includes a cutting tip 1 and a tool holder 2 connected to the cutting tip 1. The cutting tip 1 is configured as a triangular pyramid shape. The cutting tip 1 includes: a first cutting edge 4, at least two first cutting edges 4 are symmetrically arranged, and the edges of at least two first cutting edges 4 form a first angle 5; a second cutting edge 6, at least four second cutting edges 6 are axially symmetrically arranged, and the plane containing at least two second cutting edges 6 forms a second angle 7 with the plane containing the opposite at least two second cutting edges 6. A chip removal platform 8 is provided between the cutting tip 1 and the tool holder 2, formed because the first angle 5 and the second angle 7 are different. Preferably, two adjacent second cutting edges 6 can form a secondary cutting surface 15. The secondary cutting surface 15 can guide the cut chips, causing them to be discharged along the secondary cutting surface 15 itself, and the smaller size of the secondary cutting surface 15 can improve part of the rigidity of the cutting head. The multi-cutting edge arrangement can reduce the depth of cut when the inner hole is opened 11, thereby reducing the amount of chips. Preferably, the included angle between the planes of two secondary cutting surfaces 15 is the second angle 7. In this utility model, the second angle 7 is preferably 25°. Preferably, the two sides of the first cutting edge 4 are the main cutting surfaces 14. The main cutting surfaces 14 directly cut the workpiece to be drilled. Figure 2 As shown, viewed from a top-down angle, the included angle (i.e., the third angle 16) between two adjacent main cutting faces 14 is 45°. More preferably, the first angle 5 of the edges of the two first cutting edges 4 is preferably 60°. Thus, this invention, through the special geometric angle design of different cutting faces, greatly improves and optimizes cutting performance, effectively increases cutting efficiency and machining accuracy, and facilitates chip removal during cutting. By setting a triangular pyramid-shaped cutting tip 1 and employing multi-angle cutting edges (with symmetrically arranged first cutting edges 4 and axially symmetrically arranged second cutting edges 6), this invention makes the force on the tool more uniform during cutting, effectively reducing cutting force and cutting torque, further reducing cutting resistance and vibration, and improving cutting efficiency and machining accuracy.

[0031] According to a preferred embodiment, the chip removal table 8 forms a chip removal groove 9 with the first cutting edge 4 and the second cutting edge 6. Preferably, the contact edges of the chip removal table 8 with the main cutting face 14 and the secondary cutting face 15 are chamfered. The chip removal table 8 facilitates the automatic discharge of chips from the cutting face to the chip removal table 8 during cutting. The geometric angle between the chip removal table 8 and the cutting tip 1 is set so that the chips remaining after the cutting tip 1 has turned or drilled the ultra-long graphite rod are discharged from its geometric gap, avoiding chip accumulation. In this invention, the contact edges of the chip removal table 8 with the main cutting face 14 and the secondary cutting face 15 are chamfered. By utilizing the difference between the first angle 5 and the second angle 7, a smooth discharge channel for chips is provided, the geometric gap is optimized, and the cutting chips can be discharged more smoothly, avoiding accumulation that affects the machining quality.

[0032] According to a preferred embodiment, the tool holder 2 is cylindrical, and its diameter is equal to the width of the tool tip 1. A platform is positioned on the side of the tool holder 2 closest to the second cutting edge 6. The width of the tool tip 1 refers to the cutting edge width of the first cutting edge 4. In this invention, the maximum cutting edge width of the first cutting edge 4 is preferably 14.8 mm. Therefore, this experimental apparatus can handle wider materials during cutting.

[0033] According to a preferred embodiment, the tool holder 2 is hollow. An air vent 10 is provided on the side of the tool holder 2 away from the tool tip 1, connecting to the hollow interior of the tool holder 2. Preferably, the diameter of the air vent 10 is 5 mm. The air vent 10 is used for cooling the tool tip 1 after overheating during turning or drilling, or for cleaning chips to prevent chip accumulation and affecting machining quality.

[0034] According to a preferred embodiment, the hollow space of the tool holder 2 extends to the connection point with the tool tip 1, and the hollow space extends in a direction perpendicular to the axis of the tool holder 2. Compressed air can enter the hollow space through the air blowing hole 10 and flow radially along the tool tip 1. This not only blows out the debris cut by the tool, allowing it to be discharged from the tool tip 1 and tool holder 2 with the airflow to improve machining quality, but also removes the heat generated by the tool tip 1 during prolonged operation, extending the service life of the tool tip 1.

[0035] According to a preferred embodiment, such as Figure 3 and Figure 5As shown, the tool holder 2 has an opening 11 on the side near the first cutting edge 4. At least two openings 11 connect to the hollow space. The openings 11 are located on the side of the tool holder 2 near the first cutting edge 4, and their main function is to connect the hollow space of the tool holder 2 with the external environment. Through these openings 11, compressed air can enter from the hollow space of the tool holder 2 and flow radially along the tool tip 1, thereby achieving tool cooling and chip removal. Chips generated during drilling tend to accumulate between the tool and the workpiece, affecting machining quality and tool life. Through the openings 11, compressed air can blow the chips out, allowing them to be discharged with the airflow from the tool tip 1 and the tool holder 2, preventing chip accumulation and ensuring smooth machining.

[0036] The design of the opening 11 in this invention not only considers cooling and chip removal functions but also takes into account the structural stability of the cutting tool. By rationally setting the position and number of openings 11, efficient cooling and chip removal can be achieved without weakening the overall strength of the cutting tool. This design allows the cutting tool to remain stable during long-term machining, reducing vibration and wear caused by heat and chip accumulation.

[0037] According to a preferred embodiment, the cutting head is fixed to the tool holder 2 by embedding it into the tool holder 2. A chip removal table 8 is anchored between the cutting head and the tool holder 2. The cutting tip 1 is tightly engaged with the tool holder 2, ensuring the stability and accuracy of the tool. The tool holder 2 of this invention is designed to be robust, ensuring the stability of the drill bit during long-term machining. More preferably, the outer periphery of the tool holder 2 can also be provided with several chip removal channels to effectively remove chips generated during the cutting process.

[0038] According to a preferred embodiment, a connecting post 12 is provided at the end of the tool holder 2 away from the tool head, and the connecting post 12 is connected to a threaded connection structure. This threaded connection structure can be an M10 specification drive thread to facilitate connection with the tool holder 3.

[0039] According to a preferred embodiment, such as Figure 4 As shown, the device also includes a tool holder 3, which has a threaded connection structure adapted to the tool holder 2 on its side near the tool holder 2. The threaded connection structure is hollow to communicate with the air blowing hole 10. Preferably, the length of the tool holder 3 is 800 mm for machining ultra-long graphite rods (internal diameter turning or drilling length up to 650 mm). The tool holder 3 can be connected to the tool holder 2 via an M10 thread to ensure a secure connection.

[0040] According to a preferred embodiment, the tool holder 3 is hollow and has an air blowing channel 13 extending along its length. The air blowing channel 13 is connected to the air blowing hole 10 of the tool holder 2. The entire device of this invention has a compact structure, is easy to install and disassemble, and is convenient for maintenance and replacement. The tool holder 2 of this invention features a hollow design and is equipped with an air blowing hole 10, which is connected to the tool holder 3 through the air blowing channel 13, forming a complete cooling and chip removal system. During drilling, compressed air enters the hollow space from the air blowing hole 10 and flows radially along the tool tip 1. This not only blows out the cut chips, preventing chip accumulation, but also removes the heat generated by the tool tip 1 during prolonged operation, effectively reducing the tool temperature and extending the tool's service life.

[0041] Throughout the text, the features indicated by “preferred” are only optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

[0042] It should be noted that the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and not intended to limit the scope of the claims. The protection scope of this utility model is defined by the claims and their equivalents.

Claims

1. A drilling device for processing ultra-long graphite rods, characterized in that, It includes at least a blade tip (1) and a blade holder (2) connected to the blade tip (1), wherein the blade tip (1) is configured in the shape of a triangular pyramid, and the blade tip (1) includes: The first cutting edge (4) is symmetrically arranged with at least two first cutting edges (4), and the edges of at least two first cutting edges (4) form a first angle (5). The second cutting edge (6) is arranged axially symmetrically at least four of the second cutting edges (6), and the plane containing at least two of the second cutting edges (6) forms a second angle (7) with the plane containing the opposite at least two of the second cutting edges (6); wherein, A chip removal platform (8) is provided between the blade tip (1) and the blade holder (2) due to the difference between the first angle (5) and the second angle (7).

2. The drill for machining an ultralong graphite rod according to claim 1, characterized by The chip removal table (8) forms a chip removal groove (9) with the first cutting edge (4) and the second cutting edge (6).

3. The drill for machining an ultralong graphite rod according to claim 2, characterized by The tool holder (2) is cylindrical, and its diameter is equal to the width of the tool tip (1). The tool holder (2) is configured as a platform on the side near the second cutting edge (6).

4. The drilling device for processing ultra-long graphite rods according to claim 3, characterized in that, The tool holder (2) is hollow, wherein, The blade holder (2) is provided with an air hole (10) connected to the hollow interior of the blade holder (2) on the side away from the blade tip (1).

5. The drilling device for processing ultra-long graphite rods according to claim 4, characterized in that, The hollow space of the blade holder (2) extends to the connection with the blade tip (1), and the hollow space extends in a direction perpendicular to the axis of the blade holder (2).

6. The drilling device for processing ultra-long graphite rods according to claim 5, characterized in that, The tool holder (2) has an opening (11) on the side near the first cutting edge (4), and at least two of the openings (11) are connected to the hollow space.

7. The drilling device for processing ultra-long graphite rods according to claim 6, characterized in that, The cutting head is fixed to the cutting head (2) by embedding it into the cutting head (2), wherein, The chip conveyor (8) is anchored between the cutter head and the cutter holder (2).

8. The drilling device for processing ultra-long graphite rods according to claim 7, characterized in that, The tool holder (2) is provided with a connecting post (12) at the end away from the tool head, and the connecting post (12) is connected to a threaded connection structure.

9. The drilling device for processing ultra-long graphite rods according to claim 8, characterized in that, It also includes a tool holder (3), which has a threaded connection structure adapted to the tool holder (2) on the side near the tool holder (2), wherein the threaded connection structure is hollow to communicate with the air blowing hole (10).

10. The drilling device for processing ultra-long graphite rods according to claim 9, characterized in that, The hollow blade (3) is provided with an air blowing channel (13) extending along the length of the blade (3), and the air blowing channel (13) is connected to the air blowing hole (10) of the blade holder (2).

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