Separable drill bit for drilling aerospace plate

Abstract

The utility model belongs to the field of aerospace plate machining, particularly relates to a separable drill bit for drilling aerospace plates, and aims to solve the problems that the conventional separable drill bit only can be detached, separated and replaced, and the length of the drill bit extending out of a cutter handle is inconvenient to flexibly adjust according to use requirements. According to the technical scheme, the drill bit comprises a drill bit body, the connection stability between a drill handle body and the drill bit body can be improved through a separable assembly, and the situation that the connection position of the drill handle body and the drill bit body is loosened due to machining vibration is prevented; and meanwhile, the problems that an existing separable drill bit for drilling holes in the aerospace plates can only be detached, separated and replaced, the length of the portion, stretching out of a cutter handle, of the drill bit is not convenient to flexibly adjust according to use requirements, and therefore when holes with different depths need to be drilled, different drill bits need to be replaced, operation is tedious, and the applicability of the drill bit is reduced are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of folded and stored tethered ball assemblies, specifically a separable drill bit for aerospace plate drilling belongs to aerospace plate machining technical field. BACKGROUND

[0002] During aircraft maintenance and manufacturing, precise drilling operation is needed for various aerospace plates. Due to the high requirements of aircraft components on precision and durability, traditional drills may encounter problems such as fast wear and precision decline during processing. The separable drill bit, with its efficient and stable characteristics, can meet the special needs of this field, so it has been widely studied and applied.

[0003] In the prior art, such as the separable drill bit for aerospace plate drilling disclosed in publication number CN221018819U, a fixed structure is provided, the drill bit is fixed at the bottom of the connecting plate, a limiting rod is fixed at the top of the connecting plate, a baffle is fixed at the outer side of the upper end of the limiting rod, the limiting rod is inserted into the fixed compartment to make the baffle contact with the spring fixed in the fixed compartment, the limiting rod is moved upward to compress the spring, after moving to the specified position, the threaded rod is screwed into the mounting hole in the limiting rod through the threaded connection between the threaded rod and the shank, to fix the limiting rod. When replacing the drill bit, only need to rotate the threaded rod to make the threaded rod leave the mounting hole, and the baffle is driven downward by the spring.

[0004] The above-mentioned patent only needs to rotate the threaded rod to make the threaded rod leave the mounting hole, and the baffle is driven downward by the spring when replacing the drill bit. However, in actual use, the above-mentioned patent can only disassemble and replace the drill bit, and it is not convenient to flexibly adjust the length of the drill bit extending out of the shank according to the needs of use. Therefore, when drilling holes of different depths, different drill bits need to be replaced, which is more cumbersome and reduces the applicability of the drill bit. UTILITY MODEL CONTENTS

[0005] The utility model provides a separable drill bit for aerospace plate drilling to solve the problem that the above-mentioned patent can only disassemble and replace the drill bit, and it is not convenient to flexibly adjust the length of the drill bit extending out of the shank according to the needs of use. Therefore, when drilling holes of different depths, different drill bits need to be replaced, which is more cumbersome and reduces the applicability of the drill bit.

[0006] The utility model realizes the above-mentioned purpose through the following technical scheme: a separable drill bit for aerospace plate drilling, comprising a drill bit body, a separable assembly located outside the drill bit body, and a self-centering material assembly located at the bottom of the drill bit body.

[0007] The separable assembly comprises a silica gel anti-skid washer sleeved on the surface of the drill bit body, the outer part of the drill bit body is detachably provided with a fastening ring, a threaded installation groove is formed in the inner part of the fastening ring, and a threaded installation ring is threadedly installed in the threaded installation groove.

[0008] As a further scheme of the utility model: the other end of the threaded installation ring is welded with a drill handle body, and the drill handle body is of a hollow structure.

[0009] As a further scheme of the utility model: the self-centering material component assembly comprises a self-centering body, the self-centering body is welded on the bottom of the drill bit body, and the self-centering body comprises a tungsten-cobalt alloy base layer, a high-speed steel reinforcing layer, a boron nitride heat-resistant layer and a metal ceramic wear-resistant coating.

[0010] As a further scheme of the utility model: the metal ceramic wear-resistant coating is located on the surface of the self-centering body, and the metal ceramic wear-resistant coating is coated with the boron nitride heat-resistant layer in the inner part.

[0011] As a further scheme of the utility model: the high-speed steel reinforcing layer is coated in the inner part of the boron nitride heat-resistant layer, and the tungsten-cobalt alloy base layer is arranged in the inner part of the high-speed steel reinforcing layer.

[0012] As a further scheme of the utility model: a plurality of chip removal grooves are formed on the surface of the drill bit body, and a chip breaking blade is fixedly installed in the inner part of each chip removal groove.

[0013] The utility model has the advantages of:

[0014] The separable assembly can increase the connection stability between the drill handle body and the drill bit body, prevent the connection part of the drill handle body and the drill bit body from loosening due to machining vibration, and solve the problem that the existing separable drill bit for spaceflight plate drilling can only be disassembled and replaced, and the length of the drill bit extending the handle cannot be flexibly adjusted according to the use requirement, so that when different depths of holes are needed to be drilled, different drill bits need to be replaced, the operation is more complicated, and the applicability of the drill bit is reduced.

[0015] The self-centering material component assembly is composed of a tungsten-cobalt alloy base layer, a high-speed steel reinforcing layer, a boron nitride heat-resistant layer and a metal ceramic wear-resistant coating, which can provide excellent wear resistance, ensure that the drill body can maintain stable performance under long-time high-load working conditions, provide excellent heat resistance, can maintain stable shape and performance in high-temperature environment, enhance the overall strength of the self-centering body, make it more stable and durable during drilling, provide a solid foundation as the basic material of the self-centering body, and ensure the overall strength and stability of the drill, which helps to enhance the service life of the self-centering body, reduce the replacement frequency, and improve the problem that the existing drill body is in direct contact with the aerospace plate during movement, so the friction is large, easy to wear, and the self-centering part is not easy to repair after wear, and the drill needs to be replaced once the wear is serious, increasing the processing cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the tethered ball storage box of the utility model;

[0018] Figure 3 It is a schematic diagram of the internal structure of the tethered ball storage box of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the utility model Figure 3 A local enlarged structure schematic diagram of the utility model.

[0020] In the figure: 1, drill shank body; 2, drill bit body; 3, chip removal groove; 4, separable assembly; 401, threaded mounting ring; 402, silica gel non-slip washer; 403, threaded mounting groove; 404, fastening ring; 5, self-centering material component assembly; 501, self-centering body; 502, tungsten-cobalt alloy base layer; 503, high-speed steel reinforcing layer; 504, boron nitride heat-resistant layer; 505, metal ceramic wear-resistant coating; 6, chip breaking edge. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model. Embodiment one

[0022] As Figures 1 to 4As shown, a detachable drill bit for aerospace plate drilling includes a drill bit body 2, a detachable component 4 located outside the drill bit body 2, and a self-centering material composition component 5 located at the bottom of the drill bit body 2.

[0023] The detachable component 4 includes a silica gel non-slip washer 402, which is sleeved on the surface of the drill bit body 2. A fastening ring 404 is detachably installed on the outside of the drill bit body 2. A threaded installation groove 403 is formed in the inside of the fastening ring 404. A threaded installation ring 401 is threadedly installed in the threaded installation groove 403. The length of the drill bit body 2 extending out of the drill handle body 1 can be adjusted as needed by the detachable component 4. The silica gel non-slip washer 402 is sleeved on the drill bit body 2 at a suitable position. Then the fastening ring 404 is used to threadedly connect the threaded installation groove 403 in the inside of the fastening ring 404 with the threaded installation ring 401 at the bottom of the drill handle body 1, and to complete the extrusion of the silica gel non-slip washer 402. This arrangement can increase the connection stability between the drill handle body 1 and the drill bit body 2. Embodiment Two

[0024] In addition to including all the technical features in Embodiment One, this embodiment also includes:

[0025] The other end of the threaded installation ring 401 is welded with the drill handle body 1, which is a hollow structure. The hollow structure design of the drill handle body 1 reduces the overall weight of the drill bit, making the operation more convenient and flexible.

[0026] The self-centering material composition component 5 includes a self-centering body 501, which is welded to the bottom of the drill bit body 2. The self-centering body 501 includes a tungsten-cobalt alloy base layer 502, a high-speed steel reinforcing layer 503, a boron nitride heat-resistant layer 504, and a metal ceramic wear-resistant coating 505. This arrangement helps to increase the service life of the self-centering body 501, reduce the replacement frequency, and improve the problem that the existing drill bit body 2 directly contacts with the aerospace plate during movement, resulting in large friction and easy wear. The self-centering part is not easy to repair after wear, and the drill bit needs to be replaced once the wear is serious, increasing the processing cost.

[0027] The metal ceramic wear-resistant coating 505 is located on the surface of the self-centering body 501. The inside of the metal ceramic wear-resistant coating 505 is coated with the boron nitride heat-resistant layer 504. The metal ceramic wear-resistant coating 505 provides excellent wear resistance, ensuring that the drill bit body 2 can still maintain stable performance under long-term high-load working conditions. The boron nitride heat-resistant layer 504 has excellent heat resistance and can maintain stable shape and performance in high-temperature environments. Embodiment Three

[0028] In addition to including all the technical features in Embodiment One, this embodiment also includes:

[0029] The inside of the boron nitride heat-resistant layer 504 is coated with a high-speed steel reinforcing layer 503, and the inside of the high-speed steel reinforcing layer 503 is provided with a tungsten-cobalt alloy base layer 502; the high-speed steel reinforcing layer 503 enhances the overall strength of the self-centering body 501, making it more stable and durable during drilling; the tungsten-cobalt alloy base layer 502 serves as the base material of the self-centering body 501, providing a solid foundation to ensure the overall strength and stability of the drill bit.

[0030] The surface of the drill bit body 2 is provided with a plurality of groups of chip removal grooves 3, and the inside of each group of chip removal grooves 3 is fixedly installed with a chip breaking blade 6; during the drilling process, waste and debris will be collected by the chip removal grooves 3, and the chip breaking blade 6 will help to break and discharge the waste, keeping the drilling process smooth.

[0031] Working principle: when using the detachable drill bit for aerospace plate drilling, the length of the drill bit body 2 extending out of the drill handle body 1 can be adjusted as needed by setting the detachable component 4, and the silica gel anti-skid washer 402 is sleeved on the drill bit body 2 at the appropriate position, then the fastening ring 404 is used to thread the threaded installation groove 403 in the inside with the threaded installation ring 401 at the bottom of the drill handle body 1, and the extrusion of the silica gel anti-skid washer 402 is completed, which can increase the connection stability between the drill handle body 1 and the drill bit body 2, prevent the connection between the drill handle body 1 and the drill bit body 2 from loosening due to processing vibration, and solve the problem that the existing detachable drill bit for aerospace plate drilling can only disassemble and replace the drill bit, which is not convenient for flexible adjustment of the length of the drill bit extending out of the knife handle according to the use needs, so when different depths of holes are needed, different drill bits need to be replaced, the operation is more cumbersome, and the applicability of the drill bit is reduced; finally, the drill handle body 1 is installed on the processing machine tool, the drill bit body 2 is aligned with the aerospace plate to be drilled, the equipment is started, the drill bit body 2 starts to rotate and applies pressure downward, and drilling is performed; in the drilling process, the waste and debris will be collected by the chip removal groove 3, and the chip breaking edge 6 will help to break and discharge the waste, keeping the drilling process smooth; the self-centering material component assembly 5 is provided, the metal ceramic wear-resistant coating 505 provides excellent wear resistance, ensuring that the drill bit body 2 can still maintain stable performance under long-term high-load working conditions, the boron nitride heat-resistant layer 504 has excellent heat resistance and can maintain stable shape and performance in high-temperature environment, the high-speed steel reinforced layer 503 enhances the overall strength of the self-centering body 501, making it more stable and durable during drilling, and the tungsten-cobalt alloy base layer 502 serves as the base material of the self-centering body 501, providing a solid foundation to ensure the overall strength and stability of the drill bit, which helps to prolong the service life of the self-centering body 501, reduce the replacement frequency, and improve the problem that the existing drill bit body 2 is in direct contact with the aerospace plate during movement, resulting in large friction and easy wear, and the self-centering part is not easy to repair after wear, and the drill bit needs to be replaced once it is severely worn, increasing the processing cost; when the desired drilling depth is reached, stop the equipment and lift the drill bit body 2; if the drill bit needs to be replaced or maintained, the detachable component 4 can be separated.

[0032] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0033] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. A detachable drill bit for aerospace panel drilling, characterized by: Including drill bit body (2), and the detachable assembly (4) outside the drill bit body (2) and the self-centering material composition assembly (5) at the bottom of the drill bit body (2); The detachable assembly (4) includes a silica gel non-slip washer (402), the silica gel non-slip washer (402) is sleeved on the surface of the drill bit body (2), the outer part of the drill bit body (2) is detachably mounted with a fastening ring (404), the inside of the fastening ring (404) is provided with a threaded mounting groove (403), and the threaded mounting groove (403) is internally threaded with a threaded mounting ring (401).

2. A detachable drill bit for drilling of aerospace panel according to claim 1, wherein: The other end of the threaded mounting ring (401) is welded with a drill handle body (1), and the drill handle body (1) is a hollow structure.

3. A detachable drill bit for drilling of aerospace panel according to claim 1, wherein: The self-centering material composition assembly (5) includes a self-centering body (501), the self-centering body (501) is welded to the bottom of the drill bit body (2), and the self-centering body (501) includes a tungsten-cobalt alloy base layer (502), a high-speed steel reinforcing layer (503), a boron nitride heat-resistant layer (504) and a metal ceramic wear-resistant coating (505).

4. A detachable drill bit for drilling of aerospace panel according to claim 3, wherein: The metal ceramic wear-resistant coating (505) is located on the surface of the self-centering body (501), and the inside of the metal ceramic wear-resistant coating (505) is coated with the boron nitride heat-resistant layer (504).

5. A detachable drill bit for drilling of aerospace panel according to claim 4, wherein: The inside of the boron nitride heat-resistant layer (504) is coated with the high-speed steel reinforcing layer (503), and the inside of the high-speed steel reinforcing layer (503) is provided with the tungsten-cobalt alloy base layer (502).

6. A detachable drill bit for drilling of aerospace panel according to claim 1, wherein: The surface of the drill bit body (2) is provided with a plurality of chip removal grooves (3), and a plurality of chip removal grooves (3) are fixedly installed with chip breaking edges (6).

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