A wave-shaped blade drill bit cutter

Abstract

This utility model discloses a wave-shaped drill bit, including a shank and a drill bit insert mounted on the shank. The drill bit insert includes two cutting edges and two chip grooves. The cutting edges and chip grooves are symmetrical about the rotation axis of the shank. The cutting edges have a continuous wave pattern, and the chip grooves have a wave pattern along the radial section of the tool. The end of the chip grooves is connected to the cutting edges. The wave-shaped chip grooves of this utility model significantly reduce the actual contact area between the chips and the tool, thereby reducing friction and improving the chip removal capacity of the drill bit. At the same time, the cutting edge of this utility model is longer than that of conventional drill bit cutting edges. The amount of material removed in the same volume is distributed over a longer edge length, which reduces the cutting load per unit edge length and avoids local overheating or stress concentration, which could lead to edge chipping or rapid wear.

Description

Technical Field

[0001] This utility model relates to the field of machining cutting tools, and more specifically, to a wave-shaped drill bit. Background Technology

[0002] In modern industrial manufacturing, drilling is a fundamental and crucial machining process widely used in numerous industries such as machinery manufacturing, automotive, and aerospace. Drill bits, as the core tools for drilling, play a decisive role in its performance. Conventional drill bits reveal several shortcomings when facing different application scenarios. On the one hand, when machining high-hardness, high-strength materials, tool wear is too rapid, and frequent tool replacements not only increase costs but also affect production efficiency. On the other hand, during drilling, design flaws in the chip flutes and cutting edges can easily lead to chip clogging and accelerated cutting edge wear, affecting drilling accuracy and surface quality, making it difficult to meet the high-precision machining requirements of modern industrial manufacturing.

[0003] Invention CN200710007745.0 discloses a non-regrinding drill bit. This non-regrinding drill bit has a pair of chip discharge grooves formed on the outer periphery of the drill bit body rotating around an axis. A groove-shaped insert mounting seat is formed on the front end of the drill bit body, which communicates with these chip discharge grooves and opens on the front end face of the drill bit body. The chip discharge grooves of the drill bit body are arc-shaped, and their contact area with the generated chips is limited. During machining, as the cutting time increases, the wear of the chip discharge grooves will intensify, and chip adhesion will also occur, ultimately reducing the tool life and the machining quality of the hole. Utility Model Content

[0004] This utility model addresses the problems of easy wear and chip adhesion in the chip removal grooves of existing drill bits, leading to tool wear, and also solves the problems of easy chipping and poor wear resistance of the cutting edges of existing drill bits by providing a wave-shaped cutting edge drill bit.

[0005] The technical solution adopted in this utility model is:

[0006] A wave-shaped drill bit includes a shank and a drill bit insert mounted on the shank. The drill bit insert includes two cutting edges and two chip grooves. The cutting edges and chip grooves are symmetrical about the rotation axis of the shank. The cutting edges are in a continuous wave pattern. The chip grooves are wave-shaped along the radial section of the tool. The end of the chip groove is connected to the cutting edge.

[0007] Furthermore, the drill bit insert is also provided with a conical positioning surface and a horizontal mounting surface. The conical positioning surface is located on the outer periphery of the drill bit insert and is groove-shaped. A front and rear mounting surface is also provided between the conical positioning surface and the chip removal groove. The conical positioning surface and the front and rear mounting surfaces cooperate with the mounting base of the tool holder. The horizontal mounting surface is located on the end face relative to the drill tip and cooperates with the mounting base.

[0008] Furthermore, the drill bit is provided with a mounting hole, and the tool holder is provided with a threaded hole. A screw is inserted into the mounting hole and then screwed into the threaded hole for fixation.

[0009] Furthermore, the drill bit is provided with a cutting edge, which is distributed in a strip along the outermost edge of the chip removal groove.

[0010] Furthermore, the cutting edge extends outward to the edge of the outer diameter profile of the entire tool to form the drill bit extension.

[0011] Furthermore, the drill bit has an arc-shaped extension.

[0012] Furthermore, the cutting edge has a transverse cutting edge at the drill tip, which is the junction of the two cutting edges and is S-shaped.

[0013] Furthermore, the tool holder is provided with an internal cooling water channel, one end of which is connected to the spindle water outlet, and the other end is provided with an outlet facing the cutting edge.

[0014] Furthermore, the surface of the drill bit is coated with an anti-wear coating.

[0015] Furthermore, the drill bit is made of cemented carbide.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The chip removal groove of this invention is designed as a wave along the radial section of the tool. Compared with the large arc design of existing drill bits, the wave chip removal groove forms multiple grooves on the rake face. The grooves significantly reduce the actual contact area between the chips and the tool, thereby reducing friction and improving the chip removal capability of the drill bit.

[0018] The cutting edge of this invention features a wavy design. Compared to the cutting edge design of existing drill bits, the cutting edge of this invention is longer, resulting in a longer contact length between the cutting edge and the workpiece. The amount of material removed in the same volume is distributed over the longer cutting edge, thus reducing the cutting load per unit cutting edge length. This avoids local overheating or stress concentration, which could lead to edge chipping or rapid wear. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a wave-shaped drill bit.

[0020] Figure 2 This is a schematic diagram of the structure of a drill bit;

[0021] Figure 3 A schematic diagram of the cutting edge of a drill bit;

[0022] Figure 4 This is a schematic diagram of the tool holder structure for a drill bit insert;

[0023] Figure 5 This is an enlarged schematic diagram of a drill bit holder mounting base;

[0024] Figure 6 Enlarged view of the holes drilled by drill bits with different drill bit extension angles;

[0025] The components are: 1. Drill bit insert; 11. Cutting edge; 111. Chisel edge; 12. Tapered locating surface; 13. Mounting hole; 14. Front and rear mounting surfaces; 15. Horizontal mounting surface; 16. Chip removal groove; 17. Drill bit extension; 18. Cutting edge; 19. First flank face; 191. Second flank face; 2. Tool holder; 21. Mounting base; 22. Threaded hole; 23. Cooling water channel; 3. Screw. Detailed Implementation

[0026] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application; however, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships 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. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise explicitly specified and limited, "on" or "below" a second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example 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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0027] Example 1

[0028] like Figures 1 to 5As shown, this embodiment provides a wave-shaped drill bit, including a tool holder 2 and a drill bit 1 mounted on the tool holder 2. The drill bit 1 includes two cutting edges 11 and two chip removal grooves 16. The cutting edges 11 and the chip removal grooves 16 are symmetrical about the rotation axis of the tool holder. The cutting edges 11 are in the shape of a continuous wave pattern, and the chip removal grooves 16 are wave-shaped along the radial section of the tool. The end of the chip removal grooves 16 is connected to the cutting edges 11.

[0029] The drill bit 1 is also provided with a conical positioning surface 12 and a horizontal mounting surface 15. The conical positioning surface 12 is located on the outer periphery of the drill bit and is groove-shaped. A front and rear mounting surface 14 is also provided between the conical positioning surface 12 and the chip removal groove 16. The conical positioning surface 12 and the front and rear mounting surfaces 14 cooperate with the mounting base 21 of the tool holder. The horizontal mounting surface 15 is located on the end face relative to the drill tip and cooperates with the upper end face of the mounting base 21. After the drill bit 1 is assembled onto the tool holder 2, it is fixed by screwing a screw 3 into the threaded hole 22 of the tool holder through the mounting hole 13 provided on the drill bit 1.

[0030] The drill bit insert 1 is provided with a cutting edge 18, which is distributed in a strip along the outermost edge of the chip removal groove 16. During drilling, the cutting edge 18 is always in contact with the machined hole wall, providing radial support and guidance. The cutting edge 11 is provided with a chisel edge 111 at the drill tip. The chisel edge 111 is the connection point of two cutting edges and is S-shaped. In the initial stage of drilling, the chisel edge 111 contacts the workpiece first, and achieves drill bit positioning through its own squeezing action. It also provides guidance during continuous drilling. The cutting edge 11 is also connected to a first flank face 19, which directly contacts the workpiece. A second flank face 191 is connected to the first flank face 19. The first flank face 19 and the second flank face 191 provide support during cutting.

[0031] During drilling, the chisel edge 111 contacts the workpiece, forming the initial cutting point and achieving preliminary centering. As machining continues, the cutting edge 11 removes material from the workpiece. Due to the extended arc design of the cutting edge 11, when machining holes of the same diameter, the contact length between the cutting edge 11 and the workpiece is longer. The same volume of material removal is distributed over a longer cutting edge, resulting in lower cutting force and heat per unit cutting edge length, and reduced tool edge wear. The removal of material from the workpiece by the cutting edge 11 generates a large amount of cutting chips, which are then removed by the spiral chip removal grooves 16. The wave-shaped chip removal grooves 16 form multiple grooves on the rake face, which significantly reduce the actual contact area between the chips and the tool, thereby reducing friction and improving the drill bit's chip removal capability.

[0032] Example 2

[0033] like Figures 1 to 6As shown, this embodiment provides a wave-shaped drill bit, including a tool holder 2 and a drill bit 1 mounted on the tool holder 2. The drill bit 1 includes two cutting edges 11 and two chip removal grooves 16. The cutting edges 11 and the chip removal grooves 16 are symmetrical about the rotation axis of the tool holder. The cutting edges 11 are in the shape of a continuous wave pattern, and the chip removal grooves 16 are wave-shaped along the radial section of the tool. The end of the chip removal grooves 16 is connected to the cutting edges 11.

[0034] The drill bit 1 is also provided with a conical positioning surface 12 and a horizontal mounting surface 15. The conical positioning surface 12 is located on the outer periphery of the drill bit and is groove-shaped. A front and rear mounting surface 14 is also provided between the conical positioning surface 12 and the chip removal groove 16. The conical positioning surface 12 and the front and rear mounting surfaces 14 cooperate with the mounting base 21 of the tool holder. The horizontal mounting surface 15 is located on the end face relative to the drill tip and cooperates with the upper end face of the mounting base 21. After the drill bit 1 is assembled onto the tool holder 2, it is fixed by screwing a screw 3 into the threaded hole 22 of the tool holder through the mounting hole 13 provided on the drill bit 1.

[0035] The drill bit insert 1 is provided with a cutting edge 18, which is distributed in a strip along the outermost edge of the chip removal groove 16. During drilling, the cutting edge 18 is always in contact with the machined hole wall, providing radial support and guidance. The cutting edge 11 is provided with a chisel edge 111 at the drill tip. The chisel edge 111 is the connection point of two cutting edges and is S-shaped. In the initial stage of drilling, the chisel edge 111 contacts the workpiece first, and achieves drill bit positioning through its own squeezing action. It also provides guidance during continuous drilling. The cutting edge 11 is also connected to a first flank face 19, which directly contacts the workpiece. A second flank face 191 is connected to the first flank face 19. The first flank face 19 and the second flank face 191 provide support during cutting.

[0036] During drilling, the chisel edge 111 contacts the workpiece, forming the initial cutting point and achieving preliminary centering. As machining continues, the cutting edge 11 removes material from the workpiece. Due to the extended arc design of the cutting edge 11, when machining holes of the same diameter, the contact length between the cutting edge 11 and the workpiece is longer. The same volume of material removal is distributed over a longer cutting edge, resulting in lower cutting force and heat per unit cutting edge length, and reduced tool edge wear. The removal of material from the workpiece by the cutting edge 11 generates a large amount of cutting chips, which are then removed by the spiral chip removal grooves 16. The wave-shaped chip removal grooves 16 form multiple grooves on the rake face, which significantly reduce the actual contact area between the chips and the tool, thereby reducing friction and improving the drill bit's chip removal capability.

[0037] Furthermore, the cutting edge 11 extends outward to the outer diameter contour edge of the entire tool to form a drill bit extension 17, which is an arc design, such as... Figure 6 As shown, after machining a certain number of holes, the hole opening becomes smoother as the extension angle of the drill bit increases.

[0038] Example 3

[0039] like Figures 1 to 5 As shown, this embodiment provides a wave-shaped drill bit, including a tool holder 2 and a drill bit 1 mounted on the tool holder 2. The drill bit 1 includes two cutting edges 11 and two chip removal grooves 16. The cutting edges 11 and the chip removal grooves 16 are symmetrical about the rotation axis of the tool holder. The cutting edges 11 are in the shape of a continuous wave pattern, and the chip removal grooves 16 are wave-shaped along the radial section of the tool. The end of the chip removal grooves 16 is connected to the cutting edges 11.

[0040] The drill bit 1 is also provided with a conical positioning surface 12 and a horizontal mounting surface 15. The conical positioning surface 12 is located on the outer periphery of the drill bit and is groove-shaped. A front and rear mounting surface 14 is also provided between the conical positioning surface 12 and the chip removal groove 16. The conical positioning surface 12 and the front and rear mounting surfaces 14 cooperate with the mounting base 21 of the tool holder. The horizontal mounting surface 15 is located on the end face relative to the drill tip and cooperates with the upper end face of the mounting base 21. After the drill bit 1 is assembled onto the tool holder 2, it is fixed by screwing a screw 3 into the threaded hole 22 of the tool holder through the mounting hole 13 provided on the drill bit 1.

[0041] The drill bit insert 1 is provided with a cutting edge 18, which is distributed in a strip along the outermost edge of the chip removal groove 16. During drilling, the cutting edge 18 is always in contact with the machined hole wall, providing radial support and guidance. The cutting edge 11 is provided with a chisel edge 111 at the drill tip. The chisel edge 111 is the connection point of two cutting edges and is S-shaped. In the initial stage of drilling, the chisel edge 111 contacts the workpiece first, and achieves drill bit positioning through its own squeezing action. It also provides guidance during continuous drilling. The cutting edge 11 is also connected to a first flank face 19, which directly contacts the workpiece. A second flank face 191 is connected to the first flank face 19. The first flank face 19 and the second flank face 191 provide support during cutting.

[0042] During drilling, the chisel edge 111 contacts the workpiece, forming the initial cutting point and achieving preliminary centering. As machining continues, the cutting edge 11 removes material from the workpiece. Due to the extended arc design of the cutting edge 11, when machining holes of the same diameter, the contact length between the cutting edge 11 and the workpiece is longer. The same volume of material removal is distributed over a longer cutting edge, resulting in lower cutting force and heat per unit cutting edge length, and reduced tool edge wear. The removal of material from the workpiece by the cutting edge 11 generates a large amount of cutting chips, which are then removed by the spiral chip removal grooves 16. The wave-shaped chip removal grooves 16 form multiple grooves on the rake face, which significantly reduce the actual contact area between the chips and the tool, thereby reducing friction and improving the drill bit's chip removal capability.

[0043] Furthermore, the drill bit insert is made of cemented carbide and coated with an anti-wear coating, thereby improving the overall performance of the tool. This embodiment also includes an internal cooling water channel 23 inside the tool holder. One end of the internal cooling water channel 23 is connected to the spindle water outlet, and the other end has an outlet facing the cutting edge, cooling the tool during machining to prevent high temperatures from accelerating wear.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A wave-shaped drill bit, comprising a shank and drill inserts mounted on the shank, characterized in that, The drill bit insert includes two cutting edges and two chip removal grooves. The cutting edges and chip removal grooves are symmetrical about the rotation axis of the tool holder. The cutting edges have a continuous wavy shape, and the chip removal grooves have a wave-like shape along the radial section of the tool. The end of the chip removal groove is connected to the cutting edge.

2. A wave-shaped drill bit according to claim 1, characterized in that, The drill bit insert is also provided with a conical positioning surface and a horizontal mounting surface. The conical positioning surface is located on the outer periphery of the drill bit insert and is groove-shaped. A front and rear mounting surface is provided between the conical positioning surface and the chip removal groove. The conical positioning surface and the front and rear mounting surfaces cooperate with the mounting base of the tool holder. The horizontal mounting surface is located on the end face relative to the drill tip and cooperates with the mounting base.

3. A wave-shaped drill bit according to claim 1, characterized in that, The drill bit is provided with a mounting hole, and the tool holder is provided with a threaded hole. A screw is inserted into the mounting hole and then screwed into the threaded hole for fixation.

4. A wave-shaped drill bit according to claim 1, characterized in that, The drill bit insert is provided with a cutting edge, which is distributed in a strip along the outermost edge of the chip removal groove.

5. A wave-shaped drill bit according to claim 1, characterized in that, The cutting edge extends outward to the outer diameter contour edge of the entire tool to form the drill bit extension.

6. A wave-shaped drill bit according to claim 5, characterized in that, The drill bit has an arc-shaped outer extension.

7. A wave-shaped drill bit according to claim 1, characterized in that, The cutting edge has a transverse cutting edge at the drill tip, which is the connection point of the two cutting edges and is S-shaped.

8. A wave-shaped drill bit according to claim 1, characterized in that, The tool holder is equipped with an internal cooling water channel. One end of the internal cooling water channel is connected to the spindle water outlet, and the other end is provided with an outlet facing the cutting edge.

9. A wave-shaped drill bit according to claim 1, characterized in that, The drill bit blade surface is coated with an anti-wear coating.

10. A wave-shaped drill bit according to claim 1, characterized in that, The drill bit insert is made of cemented carbide.

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