Alloy drill bit for machining of aeronautical fittings

Abstract

This utility model discloses an alloy drill bit for machining aerospace parts, belonging to the field of alloy drill bit technology. It includes a drill shank, a drill body, and a drill tip. The drill body is located at one end of the drill shank, and a cutting edge is located at one end of the drill body. The cutting edge is arc-shaped and has a rake angle of -5°. The drill tip is located at the other end of the drill body, with an angle of 135°. The coordinated use of the drill body, cutting edge, and cutting edge transition zone enhances the stability of the cutting edge, improves wear resistance and chipping resistance, and facilitates deep hole machining. The drill tip provides self-positioning, eliminating the need for pre-drilling. The cooling channel allows for internal cooling of the drill body and drill tip, accelerating heat dissipation and improving machining efficiency. The spiral chip removal groove provides a transition and enhances strength while facilitating chip removal.

Description

Technical Field

[0001] This utility model belongs to the field of alloy drill bit technology, specifically relating to an alloy drill bit used for machining aerospace parts. Background Technology

[0002] With the development of the aerospace industry, key components such as aircraft and engines generally adopt new metal materials represented by titanium alloys, nickel-based high-temperature alloys and high-strength stainless steel. These materials have excellent properties such as high strength, good plasticity, strong corrosion resistance and good thermal stability. However, they are also typical difficult-to-machine materials with low thermal conductivity, high cutting temperature and obvious work hardening. During the machining process, they are prone to serious tool wear, cutting vibration and chip removal difficulties.

[0003] A split-type drill bit assembly for drilling aerospace sheet metal is disclosed in the existing patent publication number CN 219093754 U, which includes a milling mechanism for drilling aerospace sheet metal. The mechanism includes a drill bit, a tool holder, a chip relief groove, and a milling insert. The drill bit is vertically connected to the top of the tool holder. The chip relief groove is recessed on the side wall of the drill bit. The milling insert is connected and locked in the chip relief groove. However, this design is not conducive to heat dissipation and is prone to overheating failure, requiring some improvements.

[0004] Therefore, it is necessary to design a highly practical alloy drill bit for machining aerospace parts. Utility Model Content

[0005] The purpose of this invention is to provide an alloy drill bit for machining aerospace parts, in order to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an alloy drill bit for processing aerospace parts, comprising a drill shank, a drill body and a drill tip, wherein a drill body is provided at one end of the drill shank, a cutting edge is provided at one end of the drill body, the cutting edge is distributed in an arc shape and the rake angle of the cutting edge is set at -5°, and a drill tip is provided at the other end of the drill body, the angle of the drill tip is set at 135°.

[0007] The present invention further explains that the surface of the drill body is provided with five sets of spiral chip removal grooves, the spiral angle of the five sets of spiral chip removal grooves is 40°, and the bottom of the five sets of spiral chip removal grooves is arranged in an arc shape.

[0008] The present invention further explains that a cutting edge transition zone is provided between the cutting edge and the drill body, and the cutting edge transition zone is a rounded transition zone with R=0.2mm.

[0009] The present invention further explains that the drill body and drill shank are provided with cooling channels inside, and the cooling channels are filled with coolant.

[0010] The present invention further illustrates that a positioning groove is provided at the other end of the drill shank.

[0011] The present invention further explains that the drill body is made of H10 ultrafine-grained cemented carbide, and the outside of the drill body is coated with a 2μm thick TiAlN nano multilayer coating.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model, through the combined use of the drill body, cutting edge, and cutting edge transition zone, can enhance the stability of the cutting edge, improve wear resistance and anti-chipping ability, and facilitate deep hole machining. Through the combined use of the drill tip, it can play a self-positioning role, eliminating the need for pre-drilling. Through the combined use of the cooling channel, it can perform internal cooling operation on the drill body and drill tip, accelerate heat dissipation, and improve machining efficiency. Through the combined use of the spiral chip removal groove, it can play a transition and enhance strength, while facilitating chip removal. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0016] Figure 3 This is a schematic diagram of the cooling channel structure of this utility model;

[0017] In the diagram: 1. Drill shank; 2. Drill body; 3. Cutting edge; 4. Cutting edge transition zone; 5. Drill tip; 6. Spiral chip removal groove; 7. Cooling channel. Detailed Implementation

[0018] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-3The present invention provides a technical solution: an alloy drill bit for processing aerospace parts, comprising a drill shank 1, a drill body 2 and a drill tip 5. The drill body 2 is provided at one end of the drill shank 1. The surface of the drill body 2 is provided with five sets of spiral chip removal grooves 6. The spiral angle of the five sets of spiral chip removal grooves 6 is 40°, and the bottom of the five sets of spiral chip removal grooves 6 is arranged in an arc shape, which serves to transition and enhance strength, while facilitating chip removal.

[0020] A cutting edge 3 is provided at one end of the drill body 2. The cutting edge 3 is distributed in an arc shape and the rake angle of the cutting edge 3 is set at -5° to enhance the stability of the cutting edge 3. A cutting edge transition area 4 is provided between the cutting edge 3 and the drill body 2. The cutting edge transition area 4 is a rounded transition area with R=0.2mm, which can improve wear resistance and anti-chipping ability.

[0021] The other end of the drill body 2 is provided with a drill tip 5, which is set at an angle of 135°, and can play a self-positioning role, eliminating the need for pre-drilling.

[0022] The drill body 2 and the drill shank 1 are provided with cooling channels 7, which are filled with coolant. During the machining process, the coolant can be guided to flow through the drill tip 5 to achieve the effect of internal cooling.

[0023] The other end of the drill shank 1 is provided with a positioning groove to prevent slippage during the machining process;

[0024] The drill body 2 is made of H10 ultrafine-grained cemented carbide, and the outside of the drill body 2 is coated with a 2μm thick TiAlN nano multilayer coating to prevent high-temperature failure.

[0025] Example 1:

[0026] During the processing of aerospace parts, drilling is required. The operator first holds the drill shank 1 and then installs it onto the processing device. At this time, the aerospace parts can be processed. During the processing, the drill tip 5 can perform self-positioning of the aerospace parts without the need for pre-drilling. At the same time, the spiral chip removal groove 6 can remove the metal chips generated during processing, preventing chips from remaining in the drill body 2 and affecting the processing accuracy. During the processing, the coolant can flow from the cooling channel 7 through the drill tip 5 and then be discharged to the outside, which can achieve the effect of internal cooling, accelerate the heat dissipation during processing, and improve processing efficiency.

[0027] The combined use of drill body 2, cutting edge 3, and cutting edge transition zone 4 enhances the stability of cutting edge 3, improves wear resistance and anti-chipping ability, and facilitates deep hole machining. The combined use of drill tip 5 provides self-positioning, eliminating the need for pre-drilling. The combined use of cooling channel 7 enables internal cooling of drill body 2 and drill tip 5, accelerating heat dissipation and improving machining efficiency. The combined use of spiral chip removal groove 6 provides transition and strength enhancement, while also facilitating chip removal.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An alloy drill bit for machining of aeronautical fittings comprising a shank (1), a body (2) and a tip (5), characterized in that, One end of the drill shank (1) is provided with a drill body (2), and one end of the drill body (2) is provided with a cutting edge (3). The cutting edge (3) is arc-shaped and the front angle of the cutting edge (3) is set at -5°. The other end of the drill body (2) is provided with a drill tip (5), and the angle of the drill tip (5) is set at 135°.

2. The alloy drill bit for machining aerospace parts according to claim 1, characterized in that, The surface of the drill body (2) is provided with five sets of spiral chip removal grooves (6), the spiral angle of the five sets of spiral chip removal grooves (6) is 40°, and the bottom of the five sets of spiral chip removal grooves (6) is arranged in an arc shape.

3. The alloy drill bit for machining aerospace parts according to claim 1, characterized in that, A cutting edge transition zone (4) is provided between the cutting edge (3) and the drill body (2), and the cutting edge transition zone (4) is a rounded transition zone with R = 0.2 mm.

4. The alloy drill bit for machining aerospace parts according to claim 1, characterized in that, The drill body (2) and drill shank (1) are provided with cooling channels (7), and the cooling channels (7) are filled with coolant.

5. An alloy drill bit for machining aerospace parts according to claim 1, characterized in that, The other end of the drill shank (1) is provided with a positioning groove.

6. The alloy drill bit for machining aerospace parts according to claim 1, characterized in that, The drill body (2) is made of H10 ultrafine-grained hard alloy, and the outside of the drill body (2) is coated with a 2μm thick TiAlN nano multilayer coating.

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