A multi-functional hole opener with replaceable blades and high-efficiency chip removal.

Abstract

This invention provides a multi-functional hole saw with replaceable blades and high-efficiency chip removal, comprising a tool holder body, multiple blades spaced apart along the circumferential direction on the tool holder body, and a retractable elastic ejector cover mounted on the front end of the tool holder body. One end of each blade is detachably connected to the tool holder body, and the other end protrudes from the front end face of the tool holder body, with a chip removal gap formed between the protruding portions of adjacent blades. The elastic ejector cover is disposed inside the multiple blades and is used to eject the waste core. The elastic ejector cover can rotate relative to the tool holder body, so that when the tool holder body rotates, the elastic ejector cover remains stationary relative to the workpiece. After the hole is drilled, the elastic ejector cover resets and automatically ejects the waste core, while simultaneously pushing the debris out from the chip removal gap. The multi-functional hole saw with replaceable blades and high-efficiency chip removal provided by this invention overcomes the shortcomings of existing hole saws, such as non-replaceable blades, poor chip removal effect, difficulty in waste removal, and limited functionality.

Description

Technical Field

[0001] This invention relates to the field of hardware cutting tool technology, specifically to a multi-functional hole opener with replaceable blades and high-efficiency chip removal. Background Technology

[0002] Hole saws are commonly used cutting tools in industrial processing, home improvement and repair, and construction, primarily used in conjunction with equipment such as electric drills, drilling machines, and milling machines to perform hole-making operations on sheet metal. Existing traditional hole saws and commonly available hole saws generally suffer from the following technical defects:

[0003] 1) The blades are not replaceable, resulting in high operating costs. The cutting teeth and cylinder are often integrally formed; once the teeth wear down, the entire hole saw must be replaced, as individual blades cannot be replaced, leading to significant resource waste. 2) Poor chip removal affects processing efficiency. The cylinder is often closed or has a simple slotted structure, causing chips to accumulate during cutting. This leads to increased cutting resistance and excessive tool heating, accelerating blade wear and causing numerous burrs and material jamming, requiring frequent machine stops for chip removal and resulting in low processing efficiency. 3) Limited functionality, only capable of hole making. Traditional hole saws can only perform circular hole making; milling is not possible after hole making. For special processing needs, multiple tools must be used, making operation cumbersome and with poor adaptability. 4) After hole making, circular scrap cores easily become stuck inside the cylinder, requiring manual knocking and prying for removal. This is inconvenient and can damage the blades and cylinder, reducing tool life. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of this, the present invention provides a multi-functional hole opener with replaceable blades and high-efficiency chip removal, which overcomes the shortcomings of existing hole openers such as non-replaceable blades, poor chip removal effect, difficulty in discharging waste, and limited functionality.

[0006] (II) Technical Solution

[0007] To address the aforementioned technical problem, this invention provides a multi-functional, high-efficiency chip-removing hole opener with replaceable blades, comprising a tool holder body, multiple blades spaced apart along the circumferential direction on the tool holder body, and a retractable elastic ejector cover mounted on the front end of the tool holder body. One end of each blade is detachably connected to the tool holder body, and the other end protrudes from the front end face of the tool holder body, with a chip removal gap formed between the protruding portions of adjacent blades. The elastic ejector cover is disposed inside the multiple blades and is used to eject waste cores. The elastic ejector cover can rotate relative to the tool holder body, so that when the tool holder body rotates, the elastic ejector cover remains stationary relative to the workpiece. After hole opening is completed, the elastic ejector cover resets and automatically ejects the waste core, while simultaneously pushing debris out from the chip removal gap.

[0008] This solution uses independently replaceable blades, which can be quickly replaced individually after wear, eliminating the need to scrap the entire hole opener and significantly reducing operating costs. Furthermore, different blade materials can be used depending on the material being processed, making it highly versatile. The flexible ejector cap automatically ejects the waste core without manual hammering or prying, making operation simple and safe. The flexible ejector cap also assists in chip removal, further improving processing smoothness. Moreover, the flexible ejector cap can rotate relative to the tool holder body; while the entire hole opener rotates during the opening process, the flexible ejector cap does not rotate, preventing friction between the flexible ejector cap and the processed product and ensuring its long-lasting durability.

[0009] In some embodiments, the blade is detachably connected to the blade holder body via a blade locking structure. The blade locking structure includes multiple annularly spaced positioning slots on the outer circumferential wall of the blade holder body, the positioning slots being adapted to the outer contour of the blade. One end of the blade is inserted into the positioning slot and secured by at least one blade screw. This design allows for quick disassembly and replacement of the blade by unscrewing the blade screw, making it convenient to use.

[0010] In some embodiments, a contraction opening is provided on the outer side of the positioning slot, the contraction opening being used to restrict the blade from dislodging from the positioning slot; a threaded hole is provided on the blade holder body, and one end of the blade screw passes through the blade and is threadedly connected to the threaded hole.

[0011] In some embodiments, a sliding shaft that can slide along its axial direction is installed inside the tool holder body, and the elastic top cover is rotatably mounted on the end of the sliding shaft via a first bearing; a spring is installed between the sliding shaft and the tool holder body, and the spring always tends to make the elastic top cover move outward. In this solution, by providing the first bearing, the elastic top cover can be rotated relative to the tool holder body; by providing the spring, the elastic top cover has an elastic effect, ensuring that the elastic top cover can automatically reset.

[0012] In some embodiments, a milling edge is provided on one side of the blade, which is used for milling operations after hole drilling. This solution enables the hole saw to perform milling, increasing its functionality and integrating hole drilling and post-drilling milling into one device.

[0013] In some embodiments, the end of the blade away from the tool holder body is provided with a layered multi-blade structure. The layered multi-blade structure includes an outer coarse cutting blade, an inner finishing blade, and a dividing blade located between the coarse cutting blade and the finishing blade. The coarse cutting blade and the dividing blade are used for initial cutting and hole opening, while the finishing blade is used for edge trimming and leveling. This multi-blade cutting design can reduce cutting force, reduce cutting heat, and improve blade durability.

[0014] In some embodiments, an anti-rotation structure is provided at the end of the sliding shaft away from the elastic top cover. The anti-rotation structure is used to restrict the sliding shaft from rotating relative to the tool holder body. The anti-rotation structure includes an anti-rotation washer installed at the end of the sliding shaft, and an anti-rotation guide groove that cooperates with the anti-rotation washer is provided in the tool holder body.

[0015] In some embodiments, the first bearing is sleeved on the sliding shaft, and a bearing clamping bolt for limiting the first bearing is threaded onto the sliding shaft; the elastic top cover is sleeved on the first bearing, and at least one bearing clamping nut for limiting the first bearing is threaded onto the elastic top cover.

[0016] In some embodiments, the sliding shaft and the anti-rotation washer are connected by an internal hex screw and an elastic washer, and an anti-rotation pin is inserted between the sliding shaft and the anti-rotation washer to restrict the anti-rotation washer from rotating relative to the sliding shaft.

[0017] In some embodiments, a second bearing and an elastic retaining ring for limiting the second bearing are installed in the tool holder body, and the sliding shaft is inserted into the second bearing.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0020] 1) It adopts an independently replaceable blade with a blade locking structure, which can be quickly replaced after the blade wears out, without the need to scrap the entire hole opener, greatly reducing the cost of use; at the same time, different blades can be replaced according to the material being processed, making it extremely versatile.

[0021] 2) A milling edge is added to the blade to enable it to perform milling. It integrates multiple functions such as hole opening and post-hole milling, and can achieve special processing without changing multiple tools. It is compatible with a variety of materials such as metal, wood, plastic, aluminum profiles, and composite materials to meet the needs of industrial processing scenarios.

[0022] 3) The blade is designed with a layered multi-blade structure. The roughing blade, splitting blade and finishing blade are distributed in layers at the blade end. The roughing blade and splitting blade are responsible for the initial cutting and opening, while the finishing blade is responsible for trimming and smoothing, reducing burrs in the opening, improving the surface finish, and resulting in better opening effect.

[0023] 4) The chips generated during the drilling process can be discharged from the chip removal gap between the blades, making chip removal efficient and smooth; the elastic top cover can automatically eject the waste core without manual knocking or prying, making operation simple and safe. At the same time, the elastic top cover can assist in chip removal, further improving the smoothness of processing. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a perspective view of a multi-functional hole opener with replaceable blade type high-efficiency chip removal according to the present invention;

[0026] Figure 2 This is an exploded view of a multi-functional hole opener with replaceable blade type high-efficiency chip removal according to the present invention;

[0027] Figure 3 This is a cross-sectional view of a multifunctional hole opener with replaceable blade type high-efficiency chip removal according to the present invention;

[0028] Figure 4 This is a perspective view of the blade after disassembly in a multi-functional hole opener with replaceable blade type high-efficiency chip removal according to the present invention.

[0029] Figure 5 This is a side view structural schematic diagram of a multi-functional hole opener with replaceable blade type high-efficiency chip removal according to the present invention.

[0030] Figure 6 This is a schematic diagram of the positioning slot in a multi-functional hole opener with replaceable blade type high-efficiency chip removal according to the present invention.

[0031] Figure 7 This is a perspective view of the blade in a multi-functional hole opener with replaceable blade type high-efficiency chip removal according to the present invention.

[0032] Figure 8 This is a schematic diagram of the blade structure in a multi-functional hole opener with replaceable blade type high-efficiency chip removal according to the present invention.

[0033] Figure 9 This is a perspective view of the connection between the sliding shaft and the elastic top cover in a multi-functional hole opener with replaceable blade type high-efficiency chip removal according to the present invention.

[0034] Figure 10 This is a schematic diagram of the connection between the sliding shaft and the elastic top cover in a multi-functional hole opener with replaceable blade type high-efficiency chip removal according to the present invention.

[0035] The component names corresponding to the various labels in the figure are as follows: 1. Tool holder body; 101. Positioning slot; 102. Shrinkage opening; 103. Threaded hole; 104. Anti-rotation guide groove; 2. Tool insert; 201. Milling edge; 202. Roughing edge; 203. Splitting edge; 204. Finishing edge; 3. Elastic ejector cover; 4. Chip removal gap; 5. Tool insert screw; 6. Sliding shaft; 7. First bearing; 8. Spring; 9. Anti-rotation washer; 10. Bearing clamping bolt; 11. Bearing clamping nut; 12. Socket head screw; 13. Anti-rotation pin; 14. Second bearing; 15. Elastic retaining ring; 16. Elastic washer. Detailed Implementation

[0036] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0037] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0039] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0040] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0041] Combination Figures 1-10 As shown, this invention provides a multi-functional, high-efficiency chip-removing hole opener with replaceable blades, comprising a tool holder body 1, multiple blades 2 mounted at intervals along the circumferential direction on the tool holder body 1, and a retractable elastic top cover 3 mounted on the front end of the tool holder body 1. The tool holder body 1 has a stepped cylindrical structure and includes a coaxially arranged tool holder column and a connecting column. The tool holder body 1 is connected to an external driving device via the connecting column. The elastic top cover 3 is located at the center of the front end of the tool holder column of the tool holder body 1, and the multiple blades 2 are arranged in a ring at equal intervals on the outer circumferential wall of the tool holder column of the tool holder body 1.

[0042] See Figures 1 to 3 One end of the blade 2 is detachably connected to the tool holder body 1, and the other end of the blade 2 protrudes from the front end face of the tool holder body 1. A chip removal gap 4 is formed between the protruding parts of two adjacent blades 2 (the parts of the blade 2 that protrude from the front end face), and the chip removal gap 4 is used for chip discharge. An elastic ejector cover 3 is disposed inside the multiple blades 2. The elastic ejector cover 3 is used to eject the waste core. The elastic ejector cover 3 can rotate relative to the tool holder body 1, so that when the tool holder body 1 rotates, the elastic ejector cover 3 remains stationary relative to the workpiece. With this structure, when the tool holder body 1 rotates as a whole, the elastic ejector cover 3 remains stationary relative to the workpiece, and no friction is generated between the two, preventing wear of the elastic ejector cover.

[0043] During the drilling process, the drive device rotates the tool holder body 1, which in turn rotates the blade 2 to perform the drilling operation. The elastic ejector cover 3 remains stationary relative to the workpiece. During the drilling process, the generated chips can be discharged from the chip discharge gap 4, and the waste core pushes the elastic ejector cover 3 to slide into the tool holder body 1. After the drilling is completed, the elastic ejector cover 3 resets and automatically ejects the waste core, while simultaneously pushing the chips out from the chip discharge gap 4.

[0044] This structure uses independently replaceable blades, which can be quickly replaced individually after wear, eliminating the need to scrap the entire hole opener and significantly reducing operating costs. It also allows for the replacement of blades made of different materials depending on the material being processed, making it highly versatile. The flexible ejector cap automatically ejects the waste core without the need for manual hammering or prying, making operation simple and safe. The flexible ejector cap also assists in chip removal, further improving processing smoothness. Furthermore, the flexible ejector cap can rotate relative to the tool holder body. During the hole opening process, the entire hole opener rotates, but the flexible ejector cap does not rotate, preventing friction between the flexible ejector cap and the processed product and ensuring its long-lasting durability.

[0045] In some embodiments, such as Figure 1 as well as Figures 4 to 6As shown, the blade 2 is detachably connected to the blade holder body 1 via a blade locking structure. The blade locking structure includes multiple annularly spaced positioning slots 101 on the outer circumferential wall of the blade holder body 1. The positioning slots 101 are recessed and extend along the axial direction of the blade holder body 1. Openings are provided at both ends and on the outer side of the positioning slots 101. The openings at both ends allow the blade 2 to be inserted into the positioning slots 101, while the outer opening is used to lock the blade screws 5. Multiple blades 2 are arranged in a one-to-one correspondence with multiple positioning slots 101. The positioning slots 101 are adapted to the outer contour of the blade 2, providing good positioning and preventing the blade 2 from wobbling. One end of the blade 2 is inserted into the positioning slot 101 and fixed by at least one blade screw 5. To ensure a locking effect, in this embodiment, each blade 2 is fixed with two blade screws 5, and the blade 2 has a through hole for the blade screws 5 to pass through. When disassembling the blade 2, after unscrewing the blade screw 5, the blade 2 can be directly pulled out from the positioning slot 101, which enables quick disassembly and replacement and is convenient to use.

[0046] In some embodiments, such as Figures 4 to 6 As shown, a contraction opening 102 is provided on the outer side of the positioning slot 101. The contraction opening 102 is used to prevent the blade 2 from falling out of the positioning slot 101, and the contraction opening 102 also facilitates the installation of the blade screw 5. A threaded hole 103 is provided on the blade holder body 1. The threaded hole 103 extends radially along the blade holder body 1. One end of the blade screw 5 passes through the blade 2 and is threaded into the corresponding threaded hole 103. When installing the blade 2, the blade 2 is inserted into the positioning slot 101 from the openings at both ends of the positioning slot 101, then the threaded hole 103 is aligned with the through hole, and finally the blade screw 5 is tightened. The installation is convenient and quick.

[0047] In some embodiments, such as Figures 1 to 3As shown, a sliding shaft 6, which can slide along its axial direction, is installed inside the tool holder body 1. The sliding shaft 6 is coaxially arranged with the tool holder body 1, and a mounting cavity for mounting the sliding shaft 6 is provided inside the tool holder body 1. The sliding shaft 6 can only slide relative to the tool holder body 1. An elastic ejector cover 3 is rotatably mounted on the end of the sliding shaft 6 via a first bearing 7, which is a deep groove ball bearing. Under the action of the first bearing 7, the elastic ejector cover 3 can rotate relative to the tool holder body 1, so that when the tool holder body 1 rotates as a whole, the elastic ejector cover 3 remains stationary relative to the workpiece. A spring 8 is installed between the sliding shaft 6 and the tool holder body 1. The spring 8 is a conical spring. A limiting flange is provided at one end of the sliding shaft 6 near the elastic top cover 3. One end of the conical spring abuts against the limiting flange, and the other end abuts against the inner wall of the tool holder body 1. The spring 8 always makes the elastic top cover 3 tend to move outward. When making the hole, the elastic top cover moves towards the inside of the tool holder body 1, which compresses the spring 8. After the hole is made, the elastic top cover can automatically reset under the elastic force of the spring 8, so that the elastic top cover automatically pushes out the waste core. While pushing out the waste core, it can help push the debris out from the chip discharge gap 4, and the waste and debris discharge is more efficient.

[0048] In some embodiments, such as Figure 7 and Figure 8 As shown, a milling edge 201 is provided on one side of the blade 2. The milling edge 201 is used for milling operations after hole drilling. This structure, with the milling edge 201 on the blade 2, enables the hole saw to have milling function, increasing its functionality and integrating hole drilling and post-hole milling into one unit. It can achieve special processing without changing multiple tools and is suitable for various materials such as metal, wood, plastic, aluminum profiles, and composite materials, meeting the needs of industrial processing scenarios. The blade is designed with a milling edge, and after hole drilling, it can be used with a drive device with a moving function to perform milling, meeting diverse and complex processing needs and truly achieving multi-functional integration. During the milling process, the elastic top cover does not function, and the milling chips flow out from the chip discharge gap.

[0049] In some embodiments, such as Figure 7 and Figure 8 As shown, the end of the insert 2 furthest from the tool holder body 1 is provided with a layered multi-blade structure. This structure includes a roughing blade 202 on the outer side, a finishing blade 204 on the inner side, and a slitting blade 203 located between the roughing blade 202 and the finishing blade 204. The roughing blade 202 and the slitting blade 203 are used for initial cutting of the hole, while the finishing blade 204 is used for trimming and smoothing. This structure, with its layered multi-blade design on the replaceable insert, allows the roughing blade and slitting blade to handle the initial cutting of the hole, while the finishing blade handles trimming and smoothing, reducing burrs and improving the surface finish. Multi-blade cutting also reduces cutting force and heat, increasing insert durability.

[0050] In some embodiments, such as Figure 2and Figure 3 As shown, an anti-rotation structure is provided at the end of the sliding shaft 6 away from the elastic top cover 3. This anti-rotation structure restricts the sliding shaft 6 from rotating relative to the tool holder body 1, meaning the sliding shaft 6 can only move axially relative to the tool holder body 1, preventing relative rotation between the two and ensuring that the elastic top cover 3 can rotate relative to the tool holder body 1. The anti-rotation structure includes an anti-rotation washer 9 installed at the end of the sliding shaft 6. An anti-rotation guide groove 104 is provided inside the tool holder body 1 to cooperate with the anti-rotation washer 9. The anti-rotation washer 9 has a protrusion that is placed within the anti-rotation guide groove 104, so that when the tool holder body 1 rotates, the sliding shaft 6 can rotate simultaneously with the tool holder body 1. An annular flange is provided inside the mounting cavity of the tool holder body 1. Under normal conditions, under the action of the spring 8, the anti-rotation washer 9 abuts against the annular flange, thereby limiting the sliding shaft 6 and the elastic top cover 3. At this time, the elastic top cover 3 is located outside the tool holder body 1.

[0051] In some embodiments, such as Figure 2 and Figure 3 As shown, the sliding shaft 6 and the anti-rotation washer 9 are connected by an internal hex screw 12 and an elastic washer 16. One end of the internal hex screw 12 passes through the elastic washer 16 and the anti-rotation washer 9 and is threaded onto the sliding shaft 6, ensuring that the anti-rotation washer 9 will not detach from the sliding shaft 6. An anti-rotation pin 13 is inserted between the sliding shaft 6 and the anti-rotation washer 9. Part of the anti-rotation pin 13 is inserted into the anti-rotation washer 9, and the other part is inserted into the sliding shaft 6, thereby restricting the rotation of the anti-rotation washer 9 relative to the sliding shaft 6.

[0052] In some embodiments, such as Figure 2 , Figure 3 , Figure 9 and Figure 10 As shown, the first bearing 7 is sleeved on the sliding shaft 6, and a bearing clamping bolt 10 for limiting the first bearing 7 is threaded onto the sliding shaft 6. One end of the first bearing 7 abuts against the limiting flange for limiting, and the other end is limited by the bearing clamping bolt 10 to prevent the first bearing 7 from detaching from the sliding shaft 6. The elastic top cover 3 is sleeved on the first bearing 7, and the first bearing 7 is located inside the elastic top cover 3. At least one bearing clamping nut 11 for limiting the first bearing 7 is threaded onto the elastic top cover 3. The bearing clamping nut 11 abuts against the first bearing to prevent the elastic top cover 3 from detaching from the first bearing 7. In this embodiment, there are two bearing clamping nuts 11 for better fastening effect.

[0053] In some embodiments, such as Figure 2 , Figure 3 and Figure 9As shown, a second bearing 14 and an elastic retaining ring 15 for limiting the second bearing 14 are installed inside the tool holder body 1. The second bearing 14 is a linear bearing. One end of the linear bearing abuts against the annular flange, and the other end is limited by the elastic retaining ring 15. The sliding shaft 6 is inserted into the second bearing 14.

[0054] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A multi-functional hole opener with replaceable blade type high-efficiency chip removal, characterized in that: The tool holder includes a tool holder body (1), multiple blades (2) spaced apart along the circumferential direction on the tool holder body (1), and a retractable elastic ejector cover (3) installed at the front end of the tool holder body (1). One end of each blade (2) is detachably connected to the tool holder body (1), and the other end protrudes from the front end face of the tool holder body (1). A chip removal gap (4) is formed between the protruding parts of two adjacent blades (2). The elastic ejector cover (3) is disposed inside the multiple blades (2) and is used to eject the waste core. The elastic ejector cover (3) can rotate relative to the tool holder body (1), so that when the tool holder body (1) rotates, the elastic ejector cover (3) remains stationary relative to the workpiece. After the hole is drilled, the elastic ejector cover (3) resets and automatically ejects the waste core, while pushing the chips out from the chip removal gap (4).

2. The multi-functional hole opener with replaceable blade type high-efficiency chip removal according to claim 1, characterized in that: The blade (2) is detachably connected to the blade holder body (1) through a blade locking structure. The blade locking structure includes multiple circumferentially spaced positioning slots (101) on the outer circumferential wall of the blade holder body (1). The positioning slots (101) are adapted to the outer contour of the blade (2). One end of the blade (2) is inserted into the positioning slot (101) and fixed by at least one blade screw (5).

3. The multi-functional hole opener with replaceable blade type high-efficiency chip removal according to claim 2, characterized in that: The outer side of the positioning slot (101) is provided with a shrinkage opening (102), which is used to restrict the blade (2) from coming out of the positioning slot (101); the blade holder body (1) is provided with a threaded hole (103), and one end of the blade screw (5) passes through the blade (2) and is threadedly connected to the threaded hole (103).

4. The multi-functional hole opener with replaceable blade type high-efficiency chip removal according to claim 1, characterized in that: The tool holder body (1) is equipped with a sliding shaft (6) that can slide along its axial direction. The elastic top cover (3) is rotatably mounted on the end of the sliding shaft (6) via a first bearing (7). A spring (8) is installed between the sliding shaft (6) and the tool holder body (1). The spring (8) always makes the elastic top cover (3) tend to move outward.

5. The multi-functional hole opener with replaceable blade type high-efficiency chip removal according to claim 1, characterized in that: The blade (2) is provided with a milling edge (201) on one side, which is used for milling operations after drilling.

6. The multi-functional hole opener with replaceable blade type high-efficiency chip removal according to claim 1, characterized in that: The blade (2) has a layered multi-blade structure at one end away from the blade holder body (1). The layered multi-blade structure includes a coarse cutting blade (202) on the outer side, a finishing blade (204) on the inner side, and a splitting blade (203) between the coarse cutting blade (202) and the finishing blade (204). The coarse cutting blade (202) and the splitting blade (203) are used for initial cutting and opening, and the finishing blade (204) is used for trimming and leveling.

7. The multi-functional hole opener with replaceable blade type high-efficiency chip removal according to claim 4, characterized in that: The sliding shaft (6) is provided with an anti-rotation structure at one end away from the elastic top cover (3). The anti-rotation structure is used to restrict the sliding shaft (6) from rotating relative to the tool holder body (1). The anti-rotation structure includes an anti-rotation washer (9) installed at the end of the sliding shaft (6). The tool holder body (1) is provided with an anti-rotation guide groove (104) that cooperates with the anti-rotation washer (9).

8. The multi-functional hole opener with replaceable blade type high-efficiency chip removal according to claim 4, characterized in that: The first bearing (7) is sleeved on the sliding shaft (6), and the sliding shaft (6) is threaded with a bearing clamping bolt (10) for limiting the first bearing (7); the elastic top cover (3) is sleeved on the first bearing (7), and the elastic top cover (3) is threaded with at least one bearing clamping nut (11) for limiting the first bearing (7).

9. The multi-functional hole opener with replaceable blade type high-efficiency chip removal according to claim 7, characterized in that: The sliding shaft (6) and the anti-rotation washer (9) are connected by an internal hex screw (12) and an elastic washer (16). An anti-rotation pin (13) is inserted between the sliding shaft (6) and the anti-rotation washer (9). The anti-rotation pin (13) is used to restrict the anti-rotation washer (9) from rotating relative to the sliding shaft (6).

10. The multi-functional hole opener with replaceable blade type high-efficiency chip removal according to claim 4, characterized in that: The tool holder body (1) is equipped with a second bearing (14) and an elastic retaining ring (15) for limiting the second bearing (14), and the sliding shaft (6) is inserted into the second bearing (14).

Images