Drill bit structure and machine tool

Abstract

This application relates to the field of machining technology and provides a drill bit structure and a machine tool. The drill bit structure of this application includes a drill bit body suitable for mounting on a machine tool, a cutting head detachably mounted on the drill bit body, and a guide portion located at the end of the drill bit body. The drill bit body and the guide portion are coaxially arranged, and the guide portion is adapted to be inserted into a positioning hole in the workpiece to guide the drill bit body to rotate axially around the positioning hole, thereby cutting the workpiece by the cutting head. The drill bit structure described in this application helps to improve the quality of drill bit use.

Description

Technical Field

[0001] This application relates to the field of machining technology, and in particular to a drill bit structure and machine tool. Background Technology

[0002] Currently, most drill bits used in the machining field are designed as integrated units, mainly consisting of a drill body adapted for machine tool mounting, and a cutting edge and cutting edge strip directly formed at the end of the drill body. The drill body drives the cutting edge to rotate at high speed, achieving drilling of the workpiece. When machining countersunk holes, a guide structure is also set at the end of the drill bit, and the drill bit is inserted into a pre-machined positioning hole on the workpiece to improve the machining accuracy of the countersunk hole.

[0003] However, existing drill bits are non-separable monolithic structures. In actual machining processes, due to continuous friction between the drill bit and the workpiece, uneven distribution of cutting loads, and other factors, the cutting edge is prone to wear. When the cutting edge wears down, the entire drill bit must be disassembled and re-sharpened. This not only consumes a significant amount of machining time and increases the labor intensity of operators, but also causes the structural accuracy of the drill bit body to gradually deviate due to frequent sharpening, thus affecting the consistency of drilling dimensions and hindering the improvement of the drill bit's performance. Summary of the Invention

[0004] In view of this, this application aims to propose a drill bit structure to improve the quality of drill bit use.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] A drill bit structure includes a drill bit body suitable for mounting on a machine tool, a cutting head detachably disposed on the drill bit body, and a guide portion disposed at the end of the drill bit body.

[0007] The drill bit body and the guide portion are coaxially arranged, and the guide portion is adapted to be inserted into the positioning hole of the workpiece to guide the drill bit body to rotate axially around the positioning hole, and cut the workpiece through the cutting head.

[0008] Furthermore, the guide portion includes a connecting section connected to the drill bit body and a guide section disposed on the connecting section; the connecting section is detachably connected to the drill bit body, and the connecting section and the guide section are coaxially arranged.

[0009] Furthermore, the end of the drill bit body is provided with a threaded hole, a portion of the outer surface of the connecting section is provided with threads, and the connecting section is connected to the drill bit body by threads; a guide groove is formed between the guide section and the drill bit body.

[0010] Furthermore, the guide portion includes an adjustment component disposed on the guide section; the adjustment component is used to adjust the outer diameter of the guide section to accommodate positioning holes of different sizes.

[0011] Furthermore, the adjustment assembly includes an abutment and a drive disk; a limiting groove is formed on the guide section extending radially along the guide section, and an arc-shaped drive groove is formed on the drive disk; a limiting protrusion slidably disposed in the limiting groove and a drive protrusion slidably disposed in the drive groove are formed on the abutment, and the drive disk is rotatably disposed on the guide section to drive the abutment to extend and retract radially along the guide section.

[0012] Furthermore, the adjustment assembly also includes a locking member inserted into the guide section; the locking member is inserted into the guide section to constrain the rotation of the drive disc about its own axis.

[0013] Furthermore, the abutting member includes a sliding section slidably disposed within the guide section, and an abutting section adapted to abut against the inner peripheral wall of the positioning hole; the sliding section is cylindrical, and the abutting section is fan-shaped.

[0014] Furthermore, the drill bit body has a plurality of cutting grooves spaced axially around the drill bit body; a mounting groove is formed on one side wall of each cutting groove, and the cutting head is detachably mounted in the mounting groove.

[0015] Furthermore, it also includes a mounting component; the mounting groove is provided with a mounting hole, the cutter head is provided with a through hole, and the mounting component is connected to the mounting hole.

[0016] Compared with related technologies, this application has the following advantages:

[0017] (1) The drill bit structure described in this application, by setting a detachable cutting head, eliminates the need to grind or replace the entire drill bit body after the cutting head wears out. Only the worn cutting head needs to be replaced separately, which greatly reduces maintenance costs and labor consumption. It is especially suitable for mass production scenarios. At the same time, the drill bit body and the guide part are coaxially set, and the guide part can be inserted into the positioning hole of the workpiece to guide the rotation of the drill bit body, which effectively ensures the coaxiality and stability during the drilling process, reduces drilling deviation, improves the accuracy of cutting, and thus ensures the processing quality of the workpiece, which is conducive to improving the quality of the drill bit.

[0018] (2) By making the guide part include a connecting section and a guide section, and the connecting section is detachably connected to the drill bit body, the guide part is easy to replace when it is worn or damaged, without having to replace the entire drill bit body, which further reduces maintenance costs. At the same time, the connecting section and the guide section are coaxially set, which continues the coaxiality requirement between the guide part and the drill bit body, ensuring the accuracy of the guiding function and guaranteeing the stability and reliability of the cutting process.

[0019] (3) By connecting the drill bit body and the connecting section with threads, the structure is simple and the connection is firm. It is easy to disassemble and assemble, which facilitates the maintenance and replacement of the guide section. Furthermore, the guide groove formed between the guide section and the drill bit body can play a chip removal role during the drilling process, preventing chips from accumulating between the guide section and the positioning hole and affecting the guiding effect, which is conducive to design and implementation.

[0020] (4) By adjusting the settings of the components, the outer diameter of the guide section can be adjusted, so that the same drill bit structure can be adapted to positioning holes of different sizes, which improves the versatility and adaptability of the drill bit, expands its application range, avoids the waste of time caused by frequent drill bit replacement, improves processing efficiency, reduces processing costs, and meets diverse processing needs.

[0021] (5) By making the adjustment component include an abutment and a drive disk, the abutment is driven to extend and retract radially along the guide section by rotating the drive disk. Its structure is compact and reasonable, and the adjustment method is simple and efficient. The outer diameter of the guide section can be adjusted by simply rotating the drive disk. The matching of the limiting groove and the limiting protrusion, and the drive groove and the drive protrusion can effectively constrain the movement trajectory of the abutment, prevent the abutment from shifting during the adjustment process, and ensure the accuracy and stability of the adjustment. This allows the guide section to stably adapt to positioning holes of different sizes, thereby ensuring the guiding effect and processing accuracy during the drilling process.

[0022] (6) The locking mechanism can effectively constrain the rotation of the drive disc around its own axis, and prevent the drive disc from rotating unexpectedly due to factors such as cutting vibration during the drilling process, which would cause the expansion and contraction of the abutment. This ensures the stability of the outer diameter of the guide section, improves the reliability of the guide function, avoids drilling deviation due to changes in the outer diameter of the guide section, and facilitates design and implementation.

[0023] (7) By setting the sliding section and the abutting section, the cylindrical sliding section can slide smoothly in the guide section, ensuring the flexibility of the radial extension and retraction of the abutting part, reducing the resistance in the adjustment process, and the fan-shaped abutting section is specially used to abut against the inner peripheral wall of the positioning hole, which not only ensures the stability of the abutting but also avoids scratching or damaging the inner wall of the positioning hole, thus improving the overall processing quality.

[0024] (8) By setting the cutting groove, the chip removal efficiency during the drilling process can be effectively improved, and the chip accumulation in the cutting area can be avoided from affecting the cutting effect. At the same time, the cutting force during the cutting process is dispersed, reducing the wear of the tool head. The setting of the mounting groove provides a stable mounting position for the tool head. Meanwhile, the multiple spaced tool heads can ensure uniform cutting force, improve drilling efficiency and surface quality.

[0025] (9) By setting up mounting parts, mounting holes and through holes, the mounting parts can cooperate with the through holes on the cutting head through the mounting holes on the mounting groove, thus realizing a firm connection between the cutting head and the mounting groove. This can effectively prevent the cutting head from loosening or shifting due to vibration or excessive force during the cutting process, ensuring the stability and accuracy of the cutting head. It is also convenient to disassemble and assemble, which facilitates the subsequent replacement, maintenance or repair of the cutting head and is conducive to design implementation.

[0026] This application also proposes a machine tool including the aforementioned drill bit structure.

[0027] The machine tool described in this application, through the aforementioned drill bit structure, eliminates the need for overall grinding or replacement of the drill bit body after the cutting head wears out; only the worn cutting head needs to be replaced. This significantly reduces maintenance costs and labor consumption, making it particularly suitable for mass production scenarios. At the same time, it effectively ensures coaxiality and stability during the drilling process, reduces drilling deviation, improves cutting accuracy, and thus guarantees the processing quality of the workpiece, thereby enhancing the overall quality of the drill bit. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a schematic diagram of the drill bit structure described in the embodiments of this application;

[0030] Figure 2 This is a schematic diagram of the drill bit structure described in the embodiments of this application from another angle;

[0031] Figure 3 This is a schematic diagram of the drill bit structure in the unassembled cutter head state according to the embodiments of this application;

[0032] Figure 4 This is a schematic diagram of one embodiment of the guide section described in this application.

[0033] Figure 5 This is a schematic diagram of another embodiment of the guide section described in this application.

[0034] Figure 6 for Figure 5 Schematic diagrams of the structure shown from other angles;

[0035] Figure 7 for Figure 6 Cross-sectional view at point AA;

[0036] Figure 8 This is a schematic diagram of the locking component described in the embodiments of this application;

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Drill bit body; 2. Cutting head; 3. Guide section; 4. Guide groove; 5. Mounting components;

[0039] 101. Cutting groove; 102. Mounting groove; 103. Mounting hole; 104. Connecting part; 301. Connecting section; 302. Guide section; 303. Adjusting component; 304. Limiting groove; 305. Locking element;

[0040] 3031, Abutment part; 3032, Drive disk; 3033, Drive groove; 3034, Limiting protrusion; 3035, Drive protrusion;

[0041] 30311, Sliding section; 30312, Abutting section. Detailed Implementation

[0042] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0044] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0046] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0048] The first aspect of this application provides a drill bit structure that is used in machining, mainly for machining countersunk holes. The drill bit structure in this embodiment utilizes an innovative structural design to improve the quality of the drill bit.

[0049] In related technologies, drill bits used in the machining field are mostly designed as an integrated structure. They mainly consist of a drill body adapted for machine tool mounting, and a cutting edge and cutting edge strip directly formed at the end of the drill body. The drill body drives the cutting edge to rotate at high speed, achieving drilling of the workpiece. When machining countersunk holes, a guide structure is also set at the end of the drill bit, and the drill bit is inserted into a pre-machined positioning hole on the workpiece to improve the machining accuracy of the countersunk hole.

[0050] However, existing drill bits are non-separable monolithic structures. In actual machining processes, due to continuous friction between the drill bit and the workpiece, uneven distribution of cutting loads, and other factors, the cutting edge is prone to wear. When the cutting edge wears down, the entire drill bit must be disassembled and re-sharpened. This not only consumes a significant amount of machining time and increases the labor intensity of operators, but also causes the structural accuracy of the drill bit body to gradually deviate due to frequent sharpening, thus affecting the consistency of drilling dimensions and hindering the improvement of the drill bit's performance.

[0051] In view of this, in order to overcome the shortcomings of related technologies, the drill bit structure of this embodiment combines... Figures 1 to 8 As shown, the overall design includes a drill body 1 suitable for mounting on a machine tool, a cutting head 2 detachably mounted on the drill body 1, and a guide portion 3 located at the end of the drill body 1.

[0052] The drill bit body 1 and the guide part 3 are coaxially arranged, and the guide part 3 is adapted to be inserted into the positioning hole of the workpiece to guide the drill bit body 1 to rotate around the axial direction of the positioning hole, and cut the workpiece by the cutter head 2.

[0053] With the above configuration, the detachable cutting head 2 eliminates the need for overall sharpening or replacement of the drill body 1 after the cutting head 2 wears out. Only the worn cutting head 2 needs to be replaced, significantly reducing maintenance costs and labor consumption. This is especially suitable for high-volume processing scenarios. At the same time, the drill body 1 and the guide part 3 are coaxially arranged, and the guide part 3 can be inserted into the positioning hole of the workpiece to guide the rotation of the drill body 1. This effectively ensures coaxiality and stability during the drilling process, reduces drilling deviation, improves cutting accuracy, and thus ensures the processing quality of the workpiece, thereby improving the overall quality of the drill bit.

[0054] Based on the above general introduction, specifically, the drill bit structure in this embodiment is suitable for mounting on a machine tool and can rotate under the drive of the machine tool, thereby cutting the workpiece through the cutter head 2 to form a countersunk hole.

[0055] The drill bit structure described above has a guide part 3 at one end and a connecting part 104 that cooperates with the machine tool at the other end. The connecting part 104 can be set by referring to the existing connection structure between the drill bit structure and the machine tool, and will not be described in detail here.

[0056] In practical use, the guide part 3 can be inserted into the positioning hole of the workpiece to facilitate the guidance of the countersunk hole's machining position, improve the machining accuracy of the countersunk hole, and thus improve the quality of the drill bit.

[0057] Continue to combine Figures 1 to 8 As shown, in some exemplary embodiments, this embodiment may, for example, include a guide section 301 connected to the drill bit body 1 and a guide section 302 provided on the connect section 301.

[0058] The connecting section 301 is detachably connected to the drill bit body 1, and the connecting section 301 and the guide section 302 are coaxially arranged.

[0059] Understandably, by making the guide section 3 include the connecting section 301 and the guide section 302, and the connecting section 301 is detachably connected to the drill bit body 1, the guide section 3 can be easily replaced when it is worn or damaged, without having to replace the entire drill bit body 1, thus further reducing maintenance costs. At the same time, the connecting section 301 and the guide section 302 are coaxially arranged, which continues the coaxiality requirement between the guide section 3 and the drill bit body 1, ensuring the accuracy of the guiding function and guaranteeing the stability and reliability of the cutting process.

[0060] In practice, both the connecting section 301 and the guide section 302 are cylindrical, and in order to further improve the guiding accuracy of the guide section 3, the edge of the guide section 302 away from the drill bit body 1 is rounded.

[0061] Continue to combine Figures 1 to 8 As shown, in some exemplary embodiments, this embodiment may, for example, have a threaded hole at the end of the drill body 1, a thread formed on a portion of the outer surface of the connecting section 301, and the connecting section 301 is threadedly connected to the drill body 1, and a guide groove 4 is formed between the guide section 302 and the drill body 1.

[0062] It is understandable that by connecting the drill bit body 1 and the connecting section 301 with threads, the structure is simple and the connection is firm, and the disassembly and assembly are convenient. This facilitates the subsequent maintenance and replacement of the guide section 3. Furthermore, the guide groove 4 formed between the guide section 302 and the drill bit body 1 can play a role in chip removal during drilling, preventing chips from accumulating between the guide section 3 and the positioning hole and affecting the guiding effect, which is beneficial for design and implementation.

[0063] In practice, multiple guide parts 3 can be pre-processed according to commonly used dimensions. In actual use, different guide parts 3 can be selected according to different positioning hole sizes, and the corresponding guide parts 3 can be installed on the drill bit body 1.

[0064] Continue to combine Figures 1 to 8 As shown, in some exemplary embodiments, this embodiment may, for example, include an adjustment component 303 disposed on the guide section 302, the adjustment component 303 being used to adjust the outer diameter of the guide section 302 to accommodate positioning holes of different sizes.

[0065] Understandably, by adjusting the settings of component 303, the outer diameter of guide section 302 can be adjusted, allowing the same drill bit structure to be adapted to positioning holes of different sizes. This improves the versatility and adaptability of the drill bit, expands its application range, avoids the waste of time caused by frequent drill bit replacements, improves processing efficiency, reduces processing costs, and meets diverse processing needs.

[0066] Continue to combine Figures 1 to 8As shown, in some exemplary embodiments, this embodiment may, for example, make the adjustment component 303 include an abutment 3031 and a drive disk 3032.

[0067] The guide section 302 has a limiting groove 304 extending radially along the guide section 302, the drive disk 3032 has an arc-shaped drive groove 3033, the abutment member 3031 has a limiting protrusion 3034 slidably disposed in the limiting groove 304 and a drive protrusion 3035 slidably disposed in the drive groove 3033, and the drive disk 3032 is rotatably disposed on the guide section 302 to drive the abutment member 3031 to extend and retract radially along the guide section 302.

[0068] It is understandable that by making the adjustment component 303 include an abutment 3031 and a drive disk 3032, the abutment 3031 is driven to extend and retract radially along the guide section 302 by rotating the drive disk 3032. Its structural design is compact and reasonable, and the adjustment method is simple and efficient. The outer diameter of the guide section 302 can be adjusted by simply rotating the drive disk 3032. Furthermore, the cooperation between the limiting groove 304 and the limiting protrusion 3034, and the drive groove 3033 and the drive protrusion 3035, can effectively constrain the movement trajectory of the abutment 3031, prevent the abutment 3031 from shifting during the adjustment process, and ensure the accuracy and stability of the adjustment. This allows the guide section 302 to stably adapt to positioning holes of different sizes, thereby ensuring the guiding effect and processing accuracy during the drilling process.

[0069] In specific implementation, the aforementioned limiting protrusion 3034 and driving protrusion 3035 are both arranged to extend outward along the radial direction of the abutment member 3031, and the limiting protrusion 3034 and driving protrusion 3035 are both cylindrical and coaxially arranged. When the aforementioned driving disk 3032 rotates, the groove wall of the arc-shaped driving groove 3033 drives the driving protrusion 3035 to slide, thereby driving the abutment member 3031 to extend and retract radially along the guide section 302.

[0070] Continue to combine Figures 1 to 8 As shown, in some exemplary embodiments, this embodiment may, for example, include a locking member 305 inserted into the guide section 302 to constrain the rotation of the drive disk 3032 about its own axis.

[0071] Understandably, the locking element 305 effectively constrains the rotation of the drive disk 3032 around its own axis, preventing accidental rotation of the drive disk 3032 due to factors such as cutting vibration during drilling, thus avoiding the expansion and contraction of the abutment element 3031. This ensures the stability of the outer diameter of the guide section 302, improves the reliability of the guiding function of the guide part 3, avoids drilling deviation caused by changes in the outer diameter of the guide section 302, and facilitates design implementation.

[0072] In specific implementation, the guide section 3 may be provided with a through disassembly hole, and the disassembly hole located at the end of the guide section 302 is provided as a spline groove. A part of the locking member 305 is constructed as a spline, and the drive disk 3032 is also provided with a matching spline groove. When the locking member 305 is inserted into the guide section 302 for locking, the spline part of the locking member 305 is located in the spline groove of the drive disk 3032 and the guide section 302. The part of the locking member 305 that extends into the connecting section 301 is provided as a cylinder. During disassembly, an auxiliary column slightly smaller than the disassembly hole can be used on one side of the disassembly hole of the connecting section 301 to abut against the locking member 305, and the locking member 305 can be pushed out of the disassembly hole by external force to release the constraint of the drive disk 3032, thereby adjusting the extension length of the abutment member 3031.

[0073] Continue to combine Figures 1 to 8 As shown, in some exemplary embodiments, this embodiment may, for example, include a sliding segment 30311 slidably disposed within a guide segment 302, and an abutment segment 30312 adapted to abut against the inner peripheral wall of a positioning hole, wherein the sliding segment 30311 is cylindrical and the abutment segment 30312 is fan-shaped.

[0074] Understandably, through the design of the sliding section 30311 and the abutment section 30312, the cylindrical sliding section 30311 can slide smoothly within the guide section 302, ensuring the flexibility of the radial extension and retraction of the abutment part 3031 and reducing the resistance during the adjustment process. Furthermore, the fan-shaped abutment section 30312 is specifically designed to abut against the inner circumferential wall of the positioning hole, ensuring the stability of the abutment and preventing scratches or damage to the inner wall of the positioning hole, thereby improving the overall processing quality.

[0075] In specific implementation, both the aforementioned driving protrusion 3035 and limiting protrusion 3034 are provided on the sliding section 30311, and for example, they can be integrally formed with the sliding section 30311.

[0076] Continue to combine Figures 1 to 8 As shown, in some exemplary embodiments, this embodiment may, for example, have a plurality of cutting grooves 101 spaced axially around the drill bit body 1 formed on the drill bit body 1.

[0077] Among them, a mounting groove 102 is formed on one side wall of the cutting groove 101, and the cutting head 2 is detachably installed in the mounting groove 102.

[0078] It is understandable that by setting the cutting groove 101, the chip removal efficiency during the drilling process can be effectively improved, preventing chips from accumulating in the cutting area and affecting the cutting effect. At the same time, the cutting force during the cutting process is dispersed, reducing the wear of the tool head 2. Furthermore, the setting of the mounting groove 102 provides a stable mounting position for the tool head 2, and the multiple spaced tool heads 2 can ensure uniform cutting force, thereby improving drilling efficiency and surface quality.

[0079] In practice, after the cutter head 2 is assembled in the mounting groove 102, the cutting edge of the cutter head 2 protrudes from the end face of the drill bit body 1 near the guide part 3, so as to facilitate the cutting action of the cutter head 2.

[0080] Continue to combine Figures 1 to 8 As shown, in some exemplary embodiments, this embodiment may include, for example, a mounting member 5, a mounting groove 102 having a mounting hole 103, a cutting head 2 having a through hole, and the mounting member 5 being connected to the mounting hole 103.

[0081] Understandably, by setting up the mounting part 5, mounting hole 103 and through hole, the mounting part 5 can cooperate with the mounting hole 103 on the mounting groove 102 and the through hole on the cutter head 2, thus achieving a firm connection between the cutter head 2 and the mounting groove 102. This can effectively prevent the cutter head 2 from loosening or shifting due to vibration or excessive force during the cutting process, ensuring the stability and accuracy of the cutter head 2 in cutting. Moreover, it is convenient to disassemble and assemble, which facilitates the subsequent replacement, maintenance or repair of the cutter head 2 and is conducive to design implementation.

[0082] In practical implementation, the aforementioned mounting component 5 can be, for example, a bolt, and the through hole of the cutter head 2 can be provided with a countersunk hole so that the end of the bolt can be accommodated in the countersunk hole, reducing the impact during the cutting process.

[0083] It is worth noting that, regarding the drill bit structure of this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 8 As shown, it may include, for example, a drill body 1 suitable for mounting on a machine tool, a cutting head 2 detachably provided on the drill body 1, a mounting member 5 for mounting the cutting head 2, and a guide portion 3 provided at the end of the drill body 1.

[0084] The drill bit body 1 and the guide section 3 are coaxially arranged, and the guide section 3 is adapted to be inserted into the positioning hole of the workpiece to guide the drill bit body 1 to rotate axially around the positioning hole, thereby cutting the workpiece by the cutting head 2. The guide section 3 includes a connecting section 301 connected to the drill bit body 1 and a guide section 302 provided on the connecting section 301. The connecting section 301 is detachably connected to the drill bit body 1, and the connecting section 301 and the guide section 302 are coaxially arranged.

[0085] The drill bit body 1 has a threaded hole at its end, and a portion of the outer surface of the connecting section 301 is threaded, with the connecting section 301 threadedly connected to the drill bit body 1. A guide groove 4 is formed between the guide section 302 and the drill bit body 1. The guide section 3 includes an adjustment assembly 303 disposed on the guide section 302, which is used to adjust the outer diameter of the guide section 302 to accommodate positioning holes of different sizes. The adjustment assembly 303 also includes a locking member 305 inserted into the guide section 302 to constrain the rotation of the drive disc 3032 around its own axis.

[0086] The abutment member 3031 includes a sliding section 30311 slidably disposed within the guide section 302, and an abutment section 30312 adapted to abut against the inner peripheral wall of the positioning hole. The sliding section 30311 is cylindrical, and the abutment section 30312 is fan-shaped. The drill bit body 1 has multiple axially spaced cutting grooves 101 formed around it. A mounting groove 102 is formed on one side wall of each cutting groove 101, and the cutting head 2 is detachably disposed within the mounting groove 102. The mounting groove 102 has a mounting hole 103, and the cutting head 2 has a through hole. The mounting member 5 is connected to the mounting hole 103.

[0087] The adjustment assembly 303 includes an abutment 3031 and a drive disk 3032. A limiting groove 304 is formed on the guide section 302, extending radially along the guide section 302. An arc-shaped drive groove 3033 is formed on the drive disk 3032. A limiting protrusion 3034 is slidably disposed in the limiting groove 304, and a drive protrusion 3035 is slidably disposed in the drive groove 3033. The drive disk 3032 is rotatably disposed on the guide section 302 to drive the abutment 3031 to extend and retract radially along the guide section 302.

[0088] In the preferred embodiment of the above drill bit structure, the specific configuration and arrangement of the drill bit body 1, the cutter head 2, the guide part 3, etc. can still be referred to the description in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the drill bit body 1, the cutter head 2, and the guide part 3, etc., can also be referred to the description in the above exemplary embodiments.

[0089] The drill bit structure of this embodiment adopts the above design. By setting a detachable cutting head 2, it is possible to replace the entire drill bit body 1 without grinding or replacing the entire cutting head 2 after the cutting head 2 wears out. Only the worn cutting head 2 needs to be replaced, which greatly reduces maintenance costs and labor consumption. It is especially suitable for mass production scenarios. At the same time, the drill bit body 1 and the guide part 3 are coaxially arranged, and the guide part 3 can be inserted into the positioning hole of the workpiece to guide the rotation of the drill bit body 1. This effectively ensures the coaxiality and stability during the drilling process, reduces drilling deviation, improves the accuracy of cutting, and thus ensures the processing quality of the workpiece, thereby improving the quality of the drill bit.

[0090] An embodiment of the second aspect of this application provides a machine tool in which the drill bit structure of the embodiment of the first aspect of this application is provided.

[0091] In the machine tool of this embodiment, the above-mentioned drill bit structure is assembled on the machine tool and can rotate under the drive of the machine tool to process countersunk holes. The relevant structures in the above-mentioned machine tool that are not described can be set up with reference to the relevant technologies known to those skilled in the art, and will not be described in detail here.

[0092] The machine tool in this embodiment, through the above-mentioned drill bit structure, eliminates the need for overall sharpening or replacement of the drill bit body 1 after the cutter head 2 wears out; only the worn cutter head 2 needs to be replaced. This significantly reduces maintenance costs and labor consumption, making it particularly suitable for mass production scenarios. At the same time, it effectively ensures coaxiality and stability during the drilling process, reduces drilling deviation, improves cutting accuracy, and thus guarantees the processing quality of the workpiece, thereby improving the overall quality of the drill bit.

[0093] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A drill bit structure, characterized in that: It includes a drill body (1) suitable for mounting on a machine tool, a cutting head (2) detachably mounted on the drill body (1), and a guide portion (3) provided at the end of the drill body (1). The drill bit body (1) is coaxially arranged with the guide part (3), and the guide part (3) is adapted to be inserted into the positioning hole of the workpiece to be processed, so as to guide the drill bit body (1) to rotate around the axial direction of the positioning hole, and cut the workpiece by the cutting head (2).

2. The drill bit structure according to claim 1, characterized in that: The guide section (3) includes a connecting section (301) connected to the drill bit body (1) and a guide section (302) provided on the connecting section (301). The connecting section (301) is detachably connected to the drill bit body (1), and the connecting section (301) is coaxially arranged with the guide section (302).

3. The drill bit structure according to claim 2, characterized in that: The drill bit body (1) has a threaded hole at its end, and a thread is formed on a portion of the outer surface of the connecting section (301), and the connecting section (301) is connected to the drill bit body (1) by the thread. A guide groove (4) is formed between the guide section (302) and the drill bit body (1).

4. The drill bit structure according to claim 2, characterized in that: The guide section (3) includes an adjustment component (303) disposed on the guide section (302). The adjustment component (303) is used to adjust the outer diameter of the guide section (302) to accommodate positioning holes of different sizes.

5. The drill bit structure according to claim 4, characterized in that: The adjustment assembly (303) includes an abutment (3031) and a drive disk (3032); A limiting groove (304) is formed on the guide section (302) and extends radially along the guide section (302); an arc-shaped drive groove (3033) is formed on the drive disk (3032). The abutment (3031) has a limiting protrusion (3034) that is slidably disposed in the limiting groove (304) and a driving protrusion (3035) that is slidably disposed in the driving groove (3033). The driving disk (3032) is rotatably disposed on the guide section (302) to drive the abutment (3031) to extend and retract radially along the guide section (302).

6. The drill bit structure according to claim 5, characterized in that: The adjustment assembly (303) also includes a locking element (305) inserted into the guide section (302); The locking element (305) is inserted into the guide section (302) to constrain the rotation of the drive disk (3032) about its own axis.

7. The drill bit structure according to claim 5, characterized in that: The abutment (3031) includes a sliding section (30311) slidably disposed within the guide section (302), and an abutment section (30312) adapted to abut against the inner peripheral wall of the positioning hole. The sliding section (30311) is cylindrical, and the abutting section (30312) is fan-shaped.

8. The drill bit structure according to any one of claims 1-7, characterized in that: The drill bit body (1) has a plurality of cutting grooves (101) spaced axially around the drill bit body (1). A mounting groove (102) is formed on one side wall of the cutting groove (101), and the cutting head (2) is detachably disposed in the mounting groove (102).

9. The drill bit structure according to claim 8, characterized in that: It also includes mounting components (5); The mounting groove (102) is provided with a mounting hole (103), the cutter head (2) is provided with a through hole, and the mounting component (5) is connected to the mounting hole (103).

10. A machine tool, characterized in that: The drill bit structure includes any one of claims 1-9.

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