Cutter guiding device and coring assembly

Abstract

The utility model provides a tool guiding device and a coring assembly, the tool guiding device is used for coring operation of a cylindrical coring tool on a workpiece, the hardness of the tool guiding device is smaller than that of the workpiece, and the tool guiding device comprises a first part, a second part and a third part, the first part is connected to one end part of the workpiece and at least partially covers the end surface of the end part, so that the coring tool is firstly in contact with the first part when performing coring operation from the end surface; the second part is connected to the circumferential surface of the workpiece, and the surface, connected with the workpiece, of the second part at least partially covers the edge of the end face in the circumferential direction of the workpiece. And the tool guiding device also provides protection for the end face and the edge of the workpiece, so that the accuracy of the coring operation is improved, and the risks of deformation and damage of the coring tool and the workpiece are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductors, in particular to a knife-leading device and a core-removing component. Background Art

[0002] In the field of materials processing, particularly semiconductor processing, coring is a widely used method. Coring typically uses a cylindrical tool to cut a portion of the material, creating a cylindrical sample or opening in the material. Coring has a wide range of applications in semiconductor processing, including material inspection, defect removal, and dimensional optimization.

[0003] The application of coring technology offers significant advantages in semiconductor processing. By rationally separating the center of the material from the outer portions, material utilization can be significantly improved and waste can be reduced. Furthermore, coring technology enables precise control of processing size and position, making it particularly suitable for applications requiring high precision, such as the processing of silicon, silicon carbide, and sapphire wafers in semiconductor chip manufacturing. This technology enables more refined material processing and helps ensure the quality of the final product.

[0004] Despite its numerous advantages, coring technology also faces several technical challenges in practice. In particular, ensuring the tool accurately cuts the center of the material and preventing breakage and damage to the material and tool during the coring process are pressing issues in this field. Utility Model Content

[0005] To address the aforementioned technical issues, the present invention provides a tool guide device and a coring assembly. The tool guide device allows for precise and stable guidance of a coring tool into a workpiece, while also protecting the end face and edges of the workpiece, thereby improving the accuracy of the coring operation and reducing the risk of deformation and damage to the coring tool and workpiece.

[0006] The technical solution of the embodiment of the utility model is achieved as follows:

[0007] In a first aspect, an embodiment of the present invention provides a tool guiding device, which is used for coring a workpiece with a cylindrical coring tool, wherein the hardness of the tool guiding device is less than the hardness of the workpiece, and the tool guiding device comprises:

[0008] a first portion connected to one end of the workpiece and at least partially covering an end surface of the end, so that the coring tool first contacts the first portion when performing a coring operation from the end surface;

[0009] The second portion is connected to the circumferential surface of the workpiece, and a surface of the second portion connected to the workpiece at least partially covers the edge of the end surface in the circumferential direction of the workpiece.

[0010] In some optional examples, the first portion is connected to the second portion to at least partially cover the edge of the end surface in the circumferential direction of the workpiece when the tool guiding device is connected to the workpiece.

[0011] In some optional examples, the tool guiding device further includes a third part, which is connected to the end surface of the workpiece and is used to guide the coring tool in a circumferential direction of the coring tool when the coring tool performs a coring operation.

[0012] In some optional examples, the first part, the second part and the third part are formed as a whole.

[0013] In some optional examples, the first portion, the second portion, and the third portion all extend continuously around the circumferential direction of the workpiece.

[0014] In some optional examples, the tool guiding device includes a plurality of segments arranged at intervals around the circumferential direction of the workpiece, wherein each segment includes at least the first portion and the second portion.

[0015] In some optional examples, the first portion, the second portion, and the third portion have different hardnesses, wherein the hardness of the first portion is smaller than the hardness of the second portion and the hardness of the third portion.

[0016] In some optional examples, the first part, the second part and the third part are integrally formed into a whole.

[0017] In some optional examples, the knife guiding device is made of graphite.

[0018] In a second aspect, an embodiment of the present invention provides a coring assembly, the coring assembly comprising:

[0019] Cylindrical coring tool;

[0020] According to the knife guiding device of the first aspect.

[0021] An embodiment of the utility model provides a knife-guiding device and a coring assembly. The knife-guiding device is used for coring operations on a workpiece by a cylindrical coring tool. The knife-guiding device includes a first part and a second part respectively connected to the end face and the circumferential surface of one end of the workpiece. By using the knife-guiding device connected to the workpiece, when the coring tool enters from the end face of the workpiece, it first contacts the knife-guiding device having a hardness lower than that of the workpiece, so that the coring tool can stably enter the workpiece and perform coring operations on the workpiece under the precise guidance of the knife-guiding device, thereby providing a more reliable guiding scheme for precision coring operations. Moreover, the risk of damage to the coring tool caused by the force of the workpiece reacting on the coring tool is reduced. In addition, the protection of the end face, circumferential surface and edge of the workpiece by the first part and the second part can also effectively prevent the workpiece from cracking and breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional schematic diagram of a coring tool provided in one embodiment of the present utility model;

[0023] Figure 2 is a schematic perspective view of a workpiece after a coring operation is performed;

[0024] Figure 3 A cross-sectional view of a knife guide device and a coring assembly provided in one embodiment of the present utility model;

[0025] Figure 4 A cross-sectional view of a knife guide device and a coring assembly provided in another embodiment of the present invention;

[0026] Figure 5 A cross-sectional view of a knife guide device and a coring assembly provided in yet another embodiment of the present invention;

[0027] Figure 6 A cross-sectional view of a knife guide device and a coring assembly provided in yet another embodiment of the present invention;

[0028] Figure 7 A perspective schematic diagram of a knife guide device and a coring assembly provided in another embodiment of the present invention;

[0029] Figure 8 A perspective schematic diagram of a knife guide device and a coring assembly provided in yet another embodiment of the present invention;

[0030] Figure 9 for Figure 8 A cross-sectional view of the knife guide device is shown;

[0031] Figure 10 A three-dimensional schematic diagram of a knife guiding device provided in one embodiment of the present utility model;

[0032] Figure 11A three-dimensional schematic diagram of a knife guiding device provided in another embodiment of the present invention;

[0033] Figure 12 A cross-sectional view of a knife guiding device provided in another embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] See also Figure 1 , which shows a scene in which the coring tool 1 provided by some embodiments of the present invention performs a coring operation on a workpiece 100. The coring tool 1 is cylindrical in shape as a whole, and may include a main body 11 and a cutting portion 12 provided on the main body 11.

[0036] The main body 11 may be cylindrical. The cutting portion 12 may be generally annular and concentrically disposed at one axial end 11A of the main body 11 relative to the central axis of the main body 11. In other words, the annular cutting portion 12 is concentrically disposed with the main body 11 and may extend from the axial end 11A of the main body 11 in the axial direction of the main body 11.

[0037] The main body 11 can be connected to a rotational drive device (not shown), and the cutting portion 12 can be integrally formed with the main body 11, so that when the main body 11 is driven to rotate about its own axis, the cutting portion 12 also rotates with the main body 11 about a central axis shared with the main body 11. The cutting portion 12 is provided with a cutting edge on its free end surface, which is used to apply a cutting force to the workpiece 100 during rotation, thereby gradually cutting the material and forming a cylindrical cutting path. The cutting edge can be continuous or can be distributed with teeth at regular intervals to improve chip removal and reduce friction generated during the cutting process. This is not limited in this regard by the present invention.

[0038] The workpiece 100 can be divided into two parts by the coring tool 1. Figure 2 As shown, a cylindrical first component 100A is taken out from the center of the workpiece 100, and the remaining portion is a cylindrical second component 100B.

[0039] However, the aforementioned coring tool 1 still presents some problems in actual cutting operations. Specifically, during the coring process, especially when the coring tool 1 initially contacts the workpiece 100, the cutting force rapidly increases from zero to a certain value due to the sudden contact of the coring tool 1 from a free state. The harder the material of the workpiece 100, the greater the cutting force. Consequently, the workpiece 100 generates a reaction force against the cutting force. This reaction force can cause the coring tool 1 to deflect relative to its original cutting direction. In severe cases, this can damage the cutting edge of the cutting portion 12 of the coring tool 1, and cause the main body 11 to bend or even break. Furthermore, when the outer circumference of the portion to be removed from the center of the workpiece 100 approaches the outer circumference of the workpiece 100, the workpiece 100 may deform or even crack at its edges due to a lack of support. If the main body 11 of the coring tool 1 deforms due to the reaction force from the workpiece 100, local deformation and cracking of the workpiece 100 will be exacerbated. This situation worsens as the axial feed rate of the coring tool 1 increases. That is to say, the deeper the coring tool 1 cuts into the workpiece 100, the greater the possibility and degree of deformation of the coring tool 1, and the more likely the cutting direction of the coring tool 1 will deviate from the predetermined direction, which not only seriously affects the accuracy of coring, but also increases the risk of damage to the workpiece 100 and the coring tool 1.

[0040] To address the above-mentioned issues, embodiments of the present invention provide a tool guide device and a coring assembly. This tool guide device allows for precise and stable guidance of the coring tool into the workpiece. It also protects the workpiece's entry face and edges, thereby improving the accuracy of the coring operation and reducing the risk of deformation and damage to the tool and workpiece.

[0041] The following describes various embodiments of the present invention in detail with reference to the accompanying drawings.

[0042] See also Figure 3 Some embodiments of the present invention provide a tool guiding device 2. The tool guiding device 2 can be used for coring a workpiece 100 using a cylindrical coring tool 1. The hardness of the tool guiding device 2 can be less than the hardness of the workpiece 100. The tool guiding device 2 can include a first portion 21 and a second portion 22.

[0043] The first portion 21 may be connected to one end 101 of the workpiece 100 and at least partially cover an end surface 101A of the end 101, so that the coring tool 1 first contacts the first portion 21 during a coring operation from the end surface 101A. The second portion 22 may be connected to a circumferential surface 101B of the workpiece 100, and a surface 22A of the second portion 22 connected to the workpiece 100 at least partially covers an edge 101C of the end surface 101A in the circumferential direction of the workpiece 100.

[0044] Figure 3 The tool guide device 2 is specifically described by taking a cylindrical workpiece 100 as an example. Figure 1 The workpiece 100 shown is generally cylindrical, but this is for illustrative purposes only and is not intended to be limiting. It should be understood that the coring tool 1 can be used for objects including, but not limited to, solid cylindrical shapes. In practice, the coring tool 1 can be used to process materials of various shapes and structures, including those that are partially hollow. This is not a limitation of the present invention.

[0045] The end surface 101A of the end portion 101 of the workpiece 100 is rounded and generally flat. The first portion 21 may be generally plate-shaped and have two opposing main surfaces, one of which may be connected to the end surface 101A of the workpiece 100, while the other main surface is exposed to facilitate the cutting of the coring tool 1. The main surface of the first portion 21 that connects to the workpiece 100 may also be formed to be flat, so as to better fit the workpiece 100, strengthen the connection between the two, and prevent the first portion 21 from accidentally separating from the workpiece 100 during the coring operation.

[0046] The first portion 21 can be configured to cover the entire end surface 101A of the workpiece 100. In this case, the first portion 21 can be in the form of a continuous plate, such as one with a circular cross-section. Alternatively, the first portion 21 can only partially cover the end surface 101A of the workpiece 100. In this case, the first portion 21 can exist only along the cutting path of the coring tool 1, that is, it can only cover a portion of the end surface 101A of the workpiece 100. This allows the coring tool 1 to first contact the first portion 21 as it moves toward the workpiece 100, and only then contact the end surface 101A of the workpiece 100 after cutting the first portion 21.

[0047] like Figure 3 As shown, the first portion 21 is connected to the end surface 101A of the workpiece 100 via its lower surface, while the upper surface of the first portion 21 is exposed to the surrounding environment. When the coring tool 1 moves downward from directly above the workpiece 100 and the first portion 21, approaching the workpiece 100, it will first contact the first portion 21 of the tool guide 2. Only after the coring tool 1 vertically cuts through the first portion 21 of the tool guide 2 can the coring tool 1 contact the workpiece 100.

[0048] Because the hardness of the guide device 2 is less than that of the workpiece 100, the first portion 21 acts as a buffer and guide when the coring tool 1 contacts the less hard guide device 2, reducing unnecessary vibration of the coring tool 1 during the coring operation, especially during the initial stages. Guided by the first portion 21, the coring tool 1 gradually approaches the workpiece 100 and ultimately and stably enters the workpiece 100, avoiding rebound or deflection of the coring tool 1 caused by direct contact with the hard workpiece and ensuring precise alignment of the coring position.

[0049] One surface of the second portion 22 may have a shape corresponding to at least a portion of the circumferential surface 101B of the end portion 101 so as to be able to be fitted and connected to this portion of the workpiece 100. Figure 3 As shown, the upper end surface of the second portion 22 can be at least partially flush with the end face 101A of the workpiece 100 so as to at least partially cover the edge 101C from the periphery of the edge 101C of the end face 101A. The edge 101C of the end face 101A, which may also be referred to as an edge, refers to the portion of the end face 101A of the workpiece 100 that intersects with the circumferential surface 101B. The term "at least partially covers" means that when the second portion 22 is connected to the workpiece 100, the second portion 22 may cover only a portion of the edge 101C of the end face 101A, or may cover the entire edge 101C along the circumferential direction of the edge 101C of the end face 101A. For example, the second portion 22 may continuously cover a segment of the edge 101C of the end face 101A, the length of which is less than the total length of the edge 101C, or may discretely cover multiple segments of the edge 101C of the end face 101A. Figure 3 For example, when the second portion 22 is connected to the workpiece 100, when observing the position where the second portion 22 is connected to the workpiece 100 from the side, the edge 101C of the end surface 101A cannot be observed, but the second portion 22 covering the edge 101C can be observed.

[0050] The second portion 22 thickens the workpiece 100 at its circumferential surface, that is, by increasing the radial dimension of the workpiece 100, thereby enhancing the workpiece 100's ability to support the coring tool, thereby effectively preventing deformation and cracking of the workpiece 100 at the end 101. This is particularly important when the outer circumference of the coring tool 1 is close to that of the workpiece 100. In this case, the remaining portion of the workpiece 100 after coring will have a smaller thickness.

[0051] Some embodiments of the present invention provide a tool guide 2. This tool guide 2 is used for coring a workpiece 100 using a cylindrical coring tool 1. The tool guide 2 comprises a first portion 21 and a second portion 22, respectively connected to the end surface 101A and circumferential surface 101B of one end 101 of the workpiece 100. By using the tool guide 2 connected to the workpiece 100, when the coring tool 1 enters the workpiece 100 from the end surface 101A, it first contacts the tool guide 2, which has a lower hardness than the workpiece 100. This allows the coring tool 1 to stably enter the workpiece 100 and perform coring operations on the workpiece 100 under the precise guidance of the tool guide 2, providing a more reliable guidance solution for precision coring operations. Furthermore, the risk of damage to the coring tool caused by the force of the workpiece 100 reacting on the coring tool 1 is reduced. Furthermore, the protection provided by the first and second portions 21, 22 to the end surface 101A, circumferential surface 101B, and edge 101C of the workpiece 100 effectively prevents cracking and breakage of the workpiece 100.

[0052] In some embodiments of the present invention, the first portion 21 and the second portion 22 may be separate components independent of each other and connected to different positions of the workpiece 100, such as Figure 3 shown.

[0053] In other embodiments of the present invention, see Figure 4 The first portion 21 may be connected to the second portion 22 to at least partially cover the edge of the end surface in the circumferential direction of the workpiece 100 when the tool guiding device 2 is connected to the workpiece 100 .

[0054] like Figure 4 As shown, the first part 21 and the second part 22 are no longer independently connected to the workpiece 100, but can be connected into a whole. The first part 21 and the second part 22 connected together can form a continuous coverage of the workpiece 100 from the end face 101A through the edge 101C to the circumferential surface 101B, thereby forming a coating on the edge 101C, that is, a wrap-around coverage. This means that not only the edge 101C is covered, but also the parts of the end face 101A and the circumferential surface 101B adjacent to the edge 101C are covered. As a result, the cutting force of the coring tool 1 can be distributed to a larger area through the covering part of the tool guide device 2, avoiding local stress concentration, especially stress concentration at the edge 101C of the workpiece 100, so that more reliable protection can be provided with the edge 101C as the core.

[0055] In some embodiments of the present invention, the entire edge 101C is covered by the connected first portion 21 and the second portion 22. In other embodiments of the present invention, only a portion of the edge 101C is covered by the connected first portion 21 and the second portion 22. This will be described in detail below with reference to the accompanying drawings.

[0056] In order to better guide the coring operation of the coring tool 1, in some embodiments of the present disclosure, see Figure 5 The tool guiding device 2 may further include a third portion 23 connected to the end surface 101A of the workpiece 100 for guiding the coring tool 1 in a circumferential direction of the coring tool 1 when the coring tool 1 performs a coring operation.

[0057] like Figure 5 As shown, the first portion 21 and the third portion 23 are jointly provided on the end surface 101A of the workpiece 100, wherein the third portion 23 can be provided on the outer peripheral side of the first portion 21. The third portion 23 extends further from the end surface 101A in a direction away from the workpiece 100 than the first portion 21. Figure 5 The third portion 23 is higher than the first portion 21. The third portion 23 is configured to not contact the coring tool 1 when the coring tool 1 is aligned with the predetermined coring center. When the coring tool 1 approaches the workpiece 100, it can enter the space defined by the third portion 23 before contacting the first portion 21. Once the coring tool 1 enters the space defined by the third portion 23, the third portion 23 can serve to guide the coring tool 1. In other words, before the coring operation officially begins, the third portion 23 can already pre-guide the coring path of the coring tool 1 until the coring operation is completed.

[0058] like Figure 5 As shown, a gap exists between the third portion 23 and the coring tool 1, thereby not affecting the normal operation of the coring tool 1 and, in particular, not introducing additional resistance to the coring tool 1. If the coring tool 1 deviates from the coring center, for example, if the central axis of the coring tool 1 translates or deflects relative to the predetermined coring path, it may contact the third portion 23, which then limits further deviation of the coring tool 1, effectively preventing the coring tool 1 from contacting non-cutting areas of the workpiece 100, particularly protecting the integrity of the workpiece surface and edges. Furthermore, the third portion 23 provides balance and support for the coring tool 1 if it deviates from the coring path, ensuring a smooth coring operation.

[0059] In order to make the blade guiding device 2 more compact and strong in structure, in some embodiments of the present disclosure, see Figure 6 , the first part 21, the second part 22 and the third part 23 can be formed as a whole.

[0060] The various parts of the knife guiding device 2 as an integral structure can not only simplify the installation of the knife guiding device 2, reduce the installation steps and debugging time, but also ensure the precise cutting path and angle of the knife guiding device 2 through the accuracy of the relative positions and angles of the various parts.

[0061] In some embodiments of the present disclosure, the first portion 21, the second portion 22, and the third portion 23 may be formed separately and then connected into a whole. In other embodiments of the present disclosure, the first portion 21, the second portion 22, and the third portion 23 may be integrally formed into a single piece.

[0062] When the first portion 21, the second portion 22, and the third portion 23 of the blade guiding device 2 are formed separately, each portion can be made of the same or different materials. The specific materials of the first portion 21, the second portion 22, and the third portion 23 can also be flexibly selected according to actual processing conditions.

[0063] For example, as described above, the various components of the blade guiding device 2 perform different functions during use. Therefore, when designing the blade guiding device 2, the various components may have different properties. In some embodiments of the present disclosure, the first portion 21, the second portion 22, and the third portion 23 may have different hardnesses, with the hardness of the first portion 21 being less than that of the second portion 22 and the third portion 23.

[0064] When the hardness of the first portion 21 is relatively low, the coring tool 1 can first obtain a certain amount of cushioning when it comes into contact with it, thereby avoiding the impact damage caused by directly cutting into the hard material, reducing tool wear, and making the coring operation smoother. At the same time, the second portion 22 and the third portion 23, which have a harderness greater than that of the first portion 21, can provide strong support for the edge 101C of the workpiece 100 as the coring tool 1 gradually cuts into the workpiece 100. The higher hardness makes the second portion 22 and the third portion 23 less likely to deform when subjected to force, thereby effectively protecting the edge of the workpiece and preventing cracking. Moreover, the third portion can also provide rigid support for the coring tool 1 in the circumferential direction, preventing the coring tool 1 from deflecting due to material deformation, allowing the tool to accurately cut into the workpiece along the predetermined path and maintain a high-precision coring operation.

[0065] When the first part 21, the second part 22 and the third part 23 of the knife guiding device 2 are integrally formed as a whole, the connection parts between the parts are eliminated, the stress concentration caused by the connection points is avoided, the overall structural strength of the knife guiding device 2 is enhanced, and it is more durable in high-intensity coring operations.

[0066] In some embodiments of the present disclosure, see Figures 7 to 9 , the first portion 21 , the second portion 22 , and the third portion 23 may all extend continuously around the circumferential direction of the workpiece 100 .

[0067] like Figures 7 to 9As shown, the blade guide device 2 is generally annular or cylindrical in shape, i.e., it has a continuous circumferential structure, providing a complete guiding surface, thereby supporting the coring tool 1 in the entire circumferential direction. In other words, the blade guide device 2 can provide uniform guidance for the coring tool 1 in the entire circumferential direction, ensuring that the coring tool maintains a consistent cutting path without deviation during the cutting process, thereby improving coring accuracy.

[0068] In other embodiments of the present disclosure, see Figures 10 to 12 The tool guiding device 2 may include a plurality of segments spaced apart and arranged around the circumferential direction of the workpiece 100, wherein each segment includes at least a first portion 21 and a second portion 22. Figures 7 to 9 In the embodiment shown in FIG, the structure of the tool guiding device 2 does not extend continuously along the circumferential direction of the workpiece 100 , but includes a plurality of segments discretely arranged around the workpiece 100 .

[0069] exist Figure 10 In the embodiment shown in FIG, the tool guiding device 2 may include a first segment 2A and a second segment 2B spaced apart from each other in the circumferential direction of the workpiece 100. The first segment 2A and the second segment 2B are symmetrically arranged and each include a first portion 21 and a second portion 22.

[0070] exist Figure 11 In the embodiment shown in FIG, the tool guiding device 2 may include a first segment 2A, a second segment 2B, and a third segment 2C spaced apart in a circumferential direction around the workpiece 100. The first segment 2A, the second segment 2B, and the third segment 2C are evenly spaced apart in a circumferential direction around the workpiece 100, i.e., the distance between two adjacent segments is equal, and each segment includes a first portion 21, a second portion 22, and a third portion 23.

[0071] although Figure 10 and Figure 11 The structure and size of each section of the blade guiding device 2 are shown to be the same, but in actual application, each section of the blade guiding device 2 can have the same or different structures and sizes. Figure 12 Shown in Figure 11 A cross-sectional view of a section in FIG.

[0072] By configuring the knife guiding device 2 to include multiple segments spaced apart in the circumferential direction, the knife guiding device 2 can adapt to changes in the circumferential shape of the workpiece, such as workpieces with bumps, curves, or other irregular edges. Different segments can be adjusted and adapted according to the actual circumferential contour of the workpiece, providing effective guidance and support for irregular workpieces. This design increases the flexibility of the knife guiding device 2, enabling it to adapt to a variety of different workpiece shapes. Furthermore, the spaced segment structure provides intermittent support in the circumferential direction of the workpiece 100, reducing the material coverage area. This significantly saves material and manufacturing costs without compromising the guiding effect, making it particularly suitable for applications with high lightweight requirements.

[0073] The material of the tool guide device 2 can be selected based on the material of the workpiece 100. In some embodiments of the present disclosure, the tool guide device 2 can be made of graphite. Due to its low friction coefficient, high temperature resistance, wear resistance, and chemical stability, the tool guide device 2 made of graphite is suitable for workpieces 100 made of a variety of materials, particularly in scenarios requiring precision machining and high-temperature machining. For example, a tool guide device 2 made of graphite can be used with workpieces 100 made of the following materials: ceramic, silicon carbide, glass, sapphire, etc.

[0074] See also Figures 3 to 8 Some embodiments of the present disclosure further provide a coring assembly 3. The coring assembly 3 may include: a cylindrical coring tool 1 and an upper tool guide device 2.

[0075] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A knife guiding device, characterized in that: The tool guiding device is used for a cylindrical coring tool to perform a coring operation on a workpiece. The hardness of the tool guiding device is less than the hardness of the workpiece, and the tool guiding device includes: a first portion connected to one end of the workpiece and at least partially covering an end surface of the end, so that the coring tool first contacts the first portion when performing a coring operation from the end surface; The second portion is connected to the circumferential surface of the workpiece, and a surface of the second portion connected to the workpiece at least partially covers the edge of the end surface in the circumferential direction of the workpiece.

2. The knife guiding device according to claim 1, characterized in that: The first portion is connected to the second portion to at least partially cover the edge of the end surface in the circumferential direction of the workpiece when the tool guiding device is connected to the workpiece.

3. The knife guiding device according to claim 1, characterized in that: The tool guiding device further includes a third part, which is connected to the end surface of the workpiece and is used to guide the coring tool in a circumferential direction of the coring tool when the coring tool performs a coring operation.

4. The knife guiding device according to claim 3, characterized in that: The first portion, the second portion, and the third portion are formed as a whole.

5. The knife guiding device according to claim 4, characterized in that: The first portion, the second portion, and the third portion each extend continuously around the circumferential direction of the workpiece.

6. The knife guiding device according to claim 4, characterized in that: The tool guiding device includes a plurality of segments arranged at intervals around the circumferential direction of the workpiece, wherein each segment includes at least the first portion and the second portion.

7. The knife guiding device according to any one of claims 3 to 6, characterized in that: The first portion, the second portion, and the third portion have different hardnesses, wherein the hardness of the first portion is smaller than the hardness of the second portion and the hardness of the third portion.

8. The knife guiding device according to any one of claims 4 to 6, characterized in that: The first part, the second part and the third part are integrally formed into a whole.

9. The knife guiding device according to any one of claims 1 to 6, characterized in that: The knife guiding device is made of graphite.

10. A coring assembly, characterized in that: The coring assembly comprises: Cylindrical coring tool; The knife guiding device according to any one of claims 1 to 9.

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