Taper hole drill bit and taper hole drilling tool

Abstract

The embodiment of the invention provides a taper hole drill bit and a taper hole drilling tool, and relates to the technical field of machining, the taper hole drill bit is provided with a handle part and a cutting part connected with the handle part, and a main cutting edge, an auxiliary cutting edge and a taper edge are sequentially arranged from the front end to the rear end of the cutting part; wherein the cone blade is provided with a blade band with a preset width. The taper hole drill bit comprises the handle part and the cutting part connected with the handle part, the cutting part comprises the main cutting edge, the auxiliary cutting edge and the taper edge, the taper edge is provided with the edge belt with the preset width, and in the cutting process of the taper edge of the taper hole drill bit, the edge belt with the preset width enables the machined hole wall to play a role in supporting the taper hole drill bit, so that the drill bit is prevented from being damaged. Therefore, cutting vibration is eliminated, and the cutter breaking risk in the cutting process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a tapered hole drill bit and a tapered hole drilling tool. Background Art

[0002] In the engine field, high requirements are usually placed on the machining accuracy of the cone hole for installing the cylinder head injector. The quality of the cone hole machining directly affects the fitting accuracy and position accuracy of the injector installation, thereby affecting the performance and reliability of the entire machine.

[0003] In the existing tapered hole processing device, the contact length between the cutting edge of the drill bit and the workpiece is relatively long, and the cutting resistance is large during the cutting process, causing large cutting vibrations and further creating the risk of tool breakage. Summary of the invention

[0004] The embodiment of the present invention provides a tapered hole drill bit and a tapered hole drilling tool to solve the technical problem of large cutting vibration generated when the mounting hole processing device is working in the related art.

[0005] In a first aspect, an embodiment of the present invention provides a tapered hole drill, which includes a shank; a cutting portion connected to the shank, wherein a main cutting edge, a secondary cutting edge and a tapered edge are sequentially arranged from the front end to the rear end of the cutting portion; wherein the tapered edge has a blade band of a preset width.

[0006] In some embodiments, the tapered hole drill bit further comprises:

[0007] A plurality of chip breaker grooves are provided at intervals on the outer periphery of the tapered blade.

[0008] In some embodiments, the cross-section of each chip breaker groove is a U-shaped structure.

[0009] In some embodiments, there are two chip breaking grooves.

[0010] In some embodiments, a surface of the cutting portion is provided with a diamond coating.

[0011] In some embodiments, the preset width of the edge band is 0.05-0.15 mm.

[0012] In some embodiments, the handle and the cutting portion are an integrally formed structure.

[0013] In some embodiments, the cutting portion is made of cemented carbide.

[0014] In some embodiments, the first clearance angle of the main cutting edge is 15-25°, and the second clearance angle is 25-35°.

[0015] In some embodiments, the aforementioned tapered hole drill bit is included.

[0016] In a second aspect, an embodiment of the present invention provides a tapered hole drilling tool, including the aforementioned tapered hole drill bit.

[0017] The beneficial effects brought about by the technical solution provided by the present invention include:

[0018] The embodiment of the present invention provides a tapered hole drill and a tapered hole drilling tool, wherein the tapered hole drill is provided with a shank and a cutting portion connected to the shank, and a main cutting edge, a secondary cutting edge and a tapered edge are sequentially provided from the front end to the rear end of the cutting portion; wherein the tapered edge has a margin of preset width. The tapered hole drill of the embodiment of the present invention comprises a shank and a cutting portion connected to the shank, wherein the cutting portion comprises a main cutting edge, a secondary cutting edge and a tapered edge, and the tapered edge has a margin of preset width. During the cutting process of the tapered edge of the tapered hole drill, the margin of preset width enables the processed hole wall to support the tapered hole drill, thereby eliminating cutting vibration and reducing the risk of tool breakage during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A front view of a tapered hole drill bit provided by an embodiment of the present invention;

[0021] Figure 2 A top view of a tapered hole drill bit provided by an embodiment of the present invention;

[0022] Figure 3 A left side view of a tapered hole drill bit provided by an embodiment of the present invention;

[0023] Figure 4 An axonometric view of a tapered hole drill bit provided in an embodiment of the present invention;

[0024] Reference numerals:

[0025] 1. Handle;

[0026] 2. Cutting part; 21. Main cutting edge; 22. Secondary cutting edge; 23. Taper edge; 231. Edge band;

[0027] 3. Chip breaker. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The embodiment of the present invention provides a tapered hole drill bit and a tapered hole drilling tool, which can solve the technical problem of large cutting vibration generated when the installation hole processing device is working in the related art.

[0030] See also Figure 1 and Figure 2 As shown, a tapered hole drill bit provided in an embodiment of the present invention is provided with a shank 1 and a cutting portion 2 connected to the shank 1. A main cutting edge 21, a secondary cutting edge 22 and a tapered edge 23 are sequentially arranged from the front end to the rear end of the cutting portion 2; wherein the tapered edge 23 has a margin 231 of a preset width d. The tapered hole drill bit of the embodiment of the present invention comprises a shank 1 and a cutting portion 2 connected to the shank 1, wherein the cutting portion 2 is divided into a main cutting edge 21, a secondary cutting edge 22 and a tapered edge 23, wherein the tapered edge 23 has a margin 231 of a preset width d, and a taper angle f of the tapered edge 23 is 16°. During the cutting process of the tapered edge 23 of the tapered hole drill bit, the margin 231 of the preset width d enables the processed hole wall to support the tapered hole drill bit, thereby eliminating cutting vibration and reducing the risk of tool breakage during the cutting process.

[0031] The embodiment of the present invention provides a tapered hole drill, which is provided with a shank and a cutting portion connected to the shank. A main cutting edge, a secondary cutting edge and a tapered edge are sequentially arranged from the front end to the rear end of the cutting portion, wherein the tapered edge has a margin of preset width. The tapered hole drill of the embodiment of the present invention comprises a shank and a cutting portion connected to the shank, wherein the cutting portions are a main cutting edge, a secondary cutting edge and a tapered edge, wherein the tapered edge has a margin of preset width. During the cutting process of the tapered edge of the tapered hole drill, the margin of preset width enables the processed hole wall to support the tapered hole drill, thereby eliminating cutting vibration and reducing the risk of tool breakage during the cutting process.

[0032] As an optional implementation, in an embodiment of the invention, see Figure 2 and Figure 4As shown, the tapered hole drill is also provided with a plurality of chip breaker grooves 3, which are arranged at intervals on the outer periphery of the tapered blade 23. During the drilling operation, the tapered hole drill will produce discrete powdered chips, which will block the operation of the drill, affect the drilling accuracy, reduce the life of the tapered hole drill, and even cause the risk of the drill bit breaking. In the embodiment of the present invention, the plurality of chip breaker grooves 3 arranged on the outer periphery of the cutting part 2 can make the chips distributed in the chip breaker grooves 3 during the cutting process, and be taken out of the hole after the hole making operation is completed, thereby reducing the cutting resistance, improving the drilling accuracy and the life of the drill, and reducing the risk of the drill bit breaking.

[0033] Specifically, the cutting portion 2 is further provided with a helix angle c. In the embodiment of the present invention, the helix angle c is 30 degrees. The helix angle c of 30 degrees allows chips to be removed smoothly during the drilling process, thereby reducing the risk of tool breakage due to chip blockage.

[0034] As an optional implementation, in an embodiment of the invention, see Figure 2 As shown, the cross section of each chip breaker 3 is a U-shaped structure. The U-shaped chip breaker 3 has a better chip removal effect, can quickly remove chips, reduce blockage, and improve the stability of the drilling process.

[0035] As an optional implementation, in an embodiment of the invention, see Figure 2 As shown, there are two chip breaker grooves 3. In the embodiment of the present invention, the two chip breaker grooves 3 are arranged at intervals on the outer periphery of the tapered blade 23, the number of the chip breaker grooves 3 is related to the length of the tapered blade 23, and the plurality of chip breaker grooves 3 are arranged at equal distances on the outer periphery of the tapered blade 23, each of the chip breaker grooves 3 is used for chip accommodation and chip removal, and the number of the chip breaker grooves 3 is adapted to the length of the tapered blade 23, so as to realize timely chip accommodation and chip removal, and improve the chip accommodation and chip removal efficiency of the tapered hole drill.

[0036] As an optional implementation, in an embodiment of the invention, a diamond coating is provided on the surface of the cutting portion 2. The diamond coating has high hardness, and the diamond coating is provided on the outer surface of the cutting portion 2 to improve the durability and drilling efficiency of the tapered hole drill bit.

[0037] As an optional implementation, in an embodiment of the invention, see Figure 1As shown, the preset width d of the edge band 231 is 0.05-0.15 mm. The edge band 231 can allow the processed hole wall to support the tapered hole drill, thereby eliminating cutting vibration. In the embodiment of the present invention, the preset width d is 0.1 mm, and the back angle e of the edge band 231 is 10°. If the width of the edge band 231 is too narrow, the support effect is insufficient and the vibration cannot be eliminated. If the width of the edge band 231 is too wide, the cutting torque increases, which will cause the risk of damage to the cutting part of the tapered hole drill.

[0038] As an optional implementation, in an embodiment of the invention, the shank 1 and the cutting portion 2 are an integrally formed structure, and the shank 1 and the cutting portion 2 of the integrally formed structure are formed at one time, which reduces the production process and improves the strength of the tapered hole drill bit.

[0039] As an optional implementation, in an embodiment of the invention, the cutting part 2 is made of cemented carbide. The cutting part 2 made of the cemented carbide material has excellent properties of high hardness, good strength and toughness, is easy to obtain higher drilling accuracy, is suitable for drilling more complex materials, can select a higher cutting speed, and can effectively reduce the risk of tool breakage.

[0040] As an optional implementation, in an embodiment of the invention, see Figure 1 and Figure 3 As shown, the first back angle a of the main cutting edge 21 is 15-25°, and the second back angle b is 25-35°. The main cutting edge 21 in the embodiment of the present invention can reduce the friction between the blade and the machined surface while ensuring good cutting edge strength.

[0041] Specifically, in an embodiment of the present invention, the blade width g of the secondary cutting edge 22 is 0.3 mm, and the reverse taper is 1:100. The reverse taper means that the diameter of the tapered hole drill is reduced by 1 mm within 100 mm from the drill tip to the tool shank 1. The reverse taper can reduce the friction between the secondary cutting edge 22 and the hole wall and finish the processed hole wall.

[0042] The embodiment of the present invention further provides a tapered hole drill, which includes the aforementioned tapered hole drill bit. The tapered hole drill bit is provided with a shank 1 and a cutting portion 2 connected to the shank 1. A main cutting edge 21, a secondary cutting edge 22 and a tapered edge 23 are sequentially arranged from the front end to the rear end of the cutting portion 2; wherein the tapered edge 23 has a blade band 231 of a preset width d. The tapered hole drill of the embodiment of the present invention includes a shank 1 and a cutting portion 2 connected to the shank 1, wherein the cutting portion 2 is divided into a main cutting edge 21, a secondary cutting edge 22 and a tapered edge 23, wherein the tapered edge 23 has a blade band 231 of a preset width d, and a taper angle f of the tapered edge 23 is 16°. During the cutting process of the tapered edge 23 of the tapered hole drill, the blade band 231 of the preset width d enables the processed hole wall to support the tapered hole drill, thereby eliminating cutting vibration and reducing the risk of tool breakage during the cutting process.

[0043] The embodiment of the present invention provides a tapered hole drill, wherein the tapered hole drill bit of the tapered hole drill is provided with a shank and a cutting portion connected to the shank. A main cutting edge, a secondary cutting edge and a tapered edge are sequentially provided from the front end to the rear end of the cutting portion, wherein the tapered edge has a margin of preset width. The tapered hole drill of the embodiment of the present invention comprises a shank and a cutting portion connected to the shank, wherein the cutting portions are a main cutting edge, a secondary cutting edge and a tapered edge, wherein the tapered edge has a margin of preset width. During the cutting process of the tapered edge of the tapered hole drill, the margin of preset width enables the processed hole wall to support the tapered hole drill, thereby eliminating cutting vibration and reducing the risk of tool breakage during the cutting process.

[0044] As an optional implementation, in an embodiment of the invention, see Figure 2 and Figure 4 As shown, the tapered hole drill is also provided with a plurality of chip breaker grooves 3, which are arranged at intervals on the outer periphery of the tapered blade 23. During the drilling operation, the tapered hole drill will produce discrete powdered chips, which will block the operation of the drill, affect the drilling accuracy, reduce the life of the tapered hole drill, and even cause the risk of the drill bit breaking. In the embodiment of the present invention, the plurality of chip breaker grooves 3 arranged on the outer periphery of the cutting part 2 can make the chips distributed in the chip breaker grooves 3 during the cutting process, and be taken out of the hole after the hole making operation is completed, thereby reducing the cutting resistance, improving the drilling accuracy and the life of the drill, and reducing the risk of the drill bit breaking.

[0045] Specifically, the cutting portion 2 is further provided with a helix angle c. In the embodiment of the present invention, the helix angle c is 30 degrees. The helix angle c of 30 degrees allows chips to be removed smoothly during the drilling process, thereby reducing the risk of tool breakage due to chip blockage.

[0046] As an optional implementation, in an embodiment of the invention, see Figure 2As shown, the cross section of each chip breaker 3 is a U-shaped structure. The U-shaped chip breaker 3 has a better chip removal effect, can quickly remove chips, reduce blockage, and improve the stability of the drilling process.

[0047] As an optional implementation, in an embodiment of the invention, see Figure 2 As shown, there are two chip breaker grooves 3. In the embodiment of the present invention, the two chip breaker grooves 3 are arranged at intervals on the outer periphery of the tapered blade 23, the number of the chip breaker grooves 3 is related to the length of the tapered blade 23, and the plurality of chip breaker grooves 3 are arranged at equal distances on the outer periphery of the tapered blade 23, each of the chip breaker grooves 3 is used for chip accommodation and chip removal, and the number of the chip breaker grooves 3 is adapted to the length of the tapered blade 23, so as to realize timely chip accommodation and chip removal, and improve the chip accommodation and chip removal efficiency of the tapered hole drilling tool.

[0048] As an optional implementation, in an embodiment of the invention, a diamond coating is provided on the surface of the cutting portion 2. The diamond coating has high hardness, and the diamond coating is provided on the outer surface of the cutting portion 2 to improve the durability and drilling efficiency of the tapered hole drill.

[0049] As an optional implementation, in an embodiment of the invention, see Figure 1 As shown, the preset width d of the edge band 231 is 0.05-0.15 mm. The edge band 231 can allow the processed hole wall to support the tapered hole drill, thereby eliminating cutting vibration. In the embodiment of the present invention, the preset width d is 0.1 mm, and the back angle e of the edge band 231 is 10°. If the width of the edge band 231 is too narrow, the support effect is insufficient and the vibration cannot be eliminated. If the width of the edge band 231 is too wide, the cutting torque increases, which will cause the risk of damage to the cutting part of the tapered hole drill.

[0050] As an optional implementation, in an embodiment of the invention, the shank 1 and the cutting portion 2 are an integrally formed structure, and the shank 1 and the cutting portion 2 of the integrally formed structure are formed at one time, which reduces the production process and improves the strength of the tapered hole drill.

[0051] As an optional implementation, in an embodiment of the invention, the cutting part 2 is made of cemented carbide. The cutting part 2 made of the cemented carbide material has excellent properties of high hardness, good strength and toughness, is easy to obtain higher drilling accuracy, is suitable for drilling more complex materials, can select a higher cutting speed, and can effectively reduce the risk of tool breakage.

[0052] As an optional implementation, in an embodiment of the invention, see Figure 1 and Figure 3As shown, the first back angle a of the main cutting edge 21 is 15-25°, and the second back angle b is 25-35°. The main cutting edge 21 in the embodiment of the present invention can reduce the friction between the blade and the machined surface while ensuring good cutting edge strength.

[0053] Specifically, in an embodiment of the present invention, the blade width g of the secondary cutting edge 22 is 0.3 mm, and the reverse taper is 1:100. The reverse taper means that the diameter of the tapered hole drill is reduced by 1 mm within 100 mm from the drill tip to the tool shank 1. The reverse taper can reduce the friction between the secondary cutting edge 22 and the hole wall and finish the processed hole wall.

[0054] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0055] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A tapered hole drill bit, characterized in that: include: A handle (1); A cutting portion (2) connected to the shank (1) is provided with a main cutting edge (21), a secondary cutting edge (22) and a tapered edge (23) in sequence from the front end to the rear end of the cutting portion (2); wherein the tapered edge (23) has an edge band (231) of a preset width.

2. A tapered hole drill according to claim 1, characterized in that: The tapered hole drill bit also includes: A plurality of chip breaker grooves (3) are provided at intervals on the outer periphery of the tapered blade (23).

3. A tapered hole drill according to claim 2, characterized in that: The cross section of each chip breaker groove (3) is a U-shaped structure.

4. A tapered hole drill according to claim 2, characterized in that: There are two chip breaker grooves (3).

5. The tapered hole drill bit according to claim 1, characterized in that: The surface of the cutting part (2) is provided with a diamond coating.

6. A tapered hole drill according to claim 1, characterized in that: The preset width of the edge band (231) is 0.05-0.15 mm.

7. The tapered hole drill bit according to claim 1, characterized in that: The handle (1) and the cutting portion (2) are an integrally formed structure.

8. The tapered hole drill bit according to claim 1, characterized in that: The cutting part (2) is made of hard alloy.

9. The tapered hole drill bit according to claim 1, characterized in that: The first clearance angle of the main cutting edge (21) is 15-25°, and the second clearance angle is 25-35°.

10. A tapered hole drilling tool, characterized in that: A tapered hole drill bit comprising any one of claims 1-9.

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