Aero composite material drilling tool with chip flute

Abstract

The utility model relates to composite material hole cutter technical field, concretely relates to a kind of aviation composite material hole cutter with chip flute, including hole cutter main part and connecting end body, the outside of hole cutter main part is equipped with spiral chip flute, and one end of hole cutter main part is fixedly connected with butt joint column, by cleaning assembly, when completing punching, preparing to punch new hole to aviation composite material by hole cutter main part, operator can make first half ring piece and second half ring piece reciprocating movement, drive connecting block and cleaning brush synchronous movement, cleaning brush can be on the outside surface of hole cutter main part, spiral chip flute and butt joint column wipe, the chip and fine particle attached to the inner surface of spiral chip flute are cleaned completely, in the process of punching new hole, the fine chip particle attached to the outside surface of hole cutter and chip flute can be prevented residual, avoid these residual fine chip particle to cause scratch to the hole wall of new hole.

Description

Technical Field

[0001] This utility model relates to the field of composite material drilling tools, specifically to an aerospace composite material drilling tool with chip removal grooves. Background Technology

[0002] Aerospace composite materials (mainly carbon fiber reinforced resin matrix composites (CFRP), glass fiber reinforced composites (GFRP), and metal-composite laminates) are widely used in key components such as wings, fuselages, and landing gear due to their advantages of high strength, lightweight, and corrosion resistance. Hole making is a core process in composite material assembly. A single aircraft component often requires hundreds or thousands of mounting holes. The quality of hole machining directly affects connection strength, sealing performance, and structural lifespan. Hole cutting tools utilize high-performance materials such as polycrystalline diamond (PCD), cubic boron nitride (CBN), diamond coatings, and TiAlN composite coatings to improve hardness, wear resistance, and lubricity.

[0003] In existing technology applications, when drilling holes in composite materials of aerospace components, the chips are mostly powdery, flocculent, or short fiber fragments. These chips enter the chip removal groove along the rake face of the cutting edge. The helix angle (10°-25°) of the chip removal groove matches the rotation direction of the drilling tool to form an axial thrust, which quickly guides the chips from inside the hole to the outside along the chip removal groove.

[0004] However, there are some drawbacks: when the cutting tool finishes drilling a composite material of an aerospace component and is removed from the hole, although it can remove the powdery, flocculent, or short fiber debris generated in the hole, fine debris particles will still adhere to the outer surface of the cutting tool and the chip removal groove. These attached fine debris particles are difficult to remove completely, and when the cutting tool performs the next drilling operation, these residual fine debris particles may scratch the hole wall of the new hole. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an aerospace composite material drilling tool with chip removal groove, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides an aerospace composite material drilling tool with a chip removal groove, including a drilling tool body and a connecting end body. The outer side of the drilling tool body is provided with a spiral chip removal groove. One end of the drilling tool body is fixedly connected to a docking post. One end of the docking post is fixedly installed with a connector. The docking of the docking post is inside one end of the connecting end body. A cleaning component is provided on the outer side of the drilling tool body.

[0008] The cleaning component includes a fixing block, which is fixedly sleeved on the outer wall of one end of the connecting end body. A telescopic sleeve is fixedly sleeved inside the fixing block, and a second guide rail is provided inside the upper end of the fixing block.

[0009] Furthermore, a screw cylinder is fixedly connected to one end of the telescopic sleeve, and a fastening nut is rotatably connected to the outer side of the screw cylinder. A first guide slide rail is provided on the upper part of the outer wall of the fastening nut. A telescopic spring is sleeved inside the fixing block, and one end of the telescopic spring is fixedly installed on one end of the fastening nut.

[0010] Furthermore, a telescopic rod is fixedly installed at one end of the telescopic spring, a connecting block is fixedly installed at one end of the telescopic rod, a sealing cover is slidably sleeved on the outer side of the telescopic rod, and one end of the sealing cover is fixedly installed on one side of the telescopic sleeve.

[0011] Furthermore, a first semi-annular plate and a second semi-annular plate are fixedly installed on one end of the connecting block, and cleaning brushes are fixedly installed on the inner walls of the first semi-annular plate and the second semi-annular plate. The cleaning brushes are two semi-annular structures, and the inner walls of the cleaning brushes contact the outer surfaces of the hole-making tool body and the spiral chip removal groove.

[0012] Furthermore, a guide rod is fixedly installed at the upper end of the connecting block, and the guide rod is slidably sleeved inside the second guide rail of the fixed block.

[0013] Furthermore, the guide rod is slidably sleeved inside the first guide rail of the fastening nut, and the guide rod is located on one side of the outer wall of the telescopic sleeve.

[0014] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0015] 1. This utility model, through its cleaning component, allows the operator to reciprocate the first and second semi-annular plates when the drilling tool body has completed drilling holes in aerospace composite materials or is preparing to drill new holes. This reciprocates the movement of the connecting block and the cleaning brush, which in turn moves the cleaning brush synchronously. The cleaning brush can wipe the outer surfaces of the drilling tool body, the spiral chip removal groove, and the connecting post, removing debris and fine particles adhering to the inner surface of the spiral chip removal groove. During the drilling of new holes, this prevents the residue of fine debris particles adhering to the outer surface of the drilling tool and the chip removal groove, thus avoiding scratches on the hole wall of the new hole.

[0016] 2. At the same time, the first guide rail and the second guide rail form a double limit and guide for the guide rod, which strictly limits the guide rod from any unnecessary movement other than along the direction of the rail. This ensures that the connecting block can only move stably along the preset trajectory, further preventing the telescopic rod from shaking or deviating externally after it leaves the telescopic sleeve. This ensures that the cleaning brush and the two semi-annular plates can always maintain horizontal and straight movement when they move outside the hole-making tool and the spiral chip removal groove, effectively preventing deviation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the hole-making tool body and the spiral chip-removing groove structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the semi-annular plate and cleaning brush structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the disassembled structure of the cleaning component of this utility model.

[0022] The labels in the diagram represent: 1. Hole-making tool body; 2. Spiral chip removal groove; 3. Connecting post; 31. Connecting joint; 4. Connecting end body; 5. Cleaning assembly; 51. Fixing block; 52. Telescopic sleeve; 54. Guide rod; 55. Fastening nut; 56. First guide rail; 57. Connecting block; 58. First semi-annular piece; 59. Second semi-annular piece; 510. Cleaning brush; 511. Second guide rail; 512. Sealing cover; 513. Screw barrel; 514. Telescopic rod; 515. Telescopic spring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] The present invention will be further described below with reference to the embodiments.

[0025] Example 1:

[0026] Reference Figures 1 to 4 This first embodiment of the present invention discloses a drilling tool for aerospace composite materials with a chip removal groove, comprising a drilling tool body 1 and a connecting end body 4. A spiral chip removal groove 2 is formed on the outer side of the drilling tool body 1. A connecting post 3 is fixedly connected to one end of the drilling tool body 1, and a connecting joint 31 is fixedly installed at one end of the connecting post 3. The 311 of the connecting post 3 is connected to the inside of one end of the connecting end body 4. A cleaning component 5 is provided on the outer side of the drilling tool body 1. The cleaning component 5 is used to clean the fine particles of debris from the outer surface of the drilling tool body 1 and the spiral chip removal groove 2. When the drilling tool body 1 rotates at high speed, its cutting edge cuts and drills holes in the aerospace composite material. The spiral chip removal groove 2 utilizes the centrifugal force and axial thrust generated by the spiral structure to remove chips during the cutting process. The generated debris is quickly discharged from the hole, avoiding the accumulation of debris between the hole wall and the tool, which would cause material chipping and delamination. The cleaning component 5 rotates synchronously with the hole-making tool body 1, and fixes the hole-making tool body 1 to the connecting end body 4 through the butt joint 31 on the docking post 3. The hole-making tool passes through the inside of the cleaning component 5. The connecting end body 4 is the spindle connection end or tool holder connection seat of drilling equipment such as CNC drilling machine or machining center. The connecting end body 4 has a docking hole or slot that matches the structure of the butt joint 31. The butt joint 31 and one end of the docking post 3 are directly inserted into the docking hole or slot of the connecting end body 4 to achieve circumferential fixation. The spiral chip removal groove 2 of the hole-making tool is a common conventional means in the prior art, and will not be described in detail here.

[0027] The cleaning component 5 includes a fixing block 51, which is fixedly sleeved on the outer wall of one end of the connecting end body 4. A telescopic sleeve 52 is fixedly sleeved inside the fixing block 51. A second guide slide rail 511 is provided inside the upper end of the fixing block 51. A screw cylinder 513 is fixedly connected to one end of the telescopic sleeve 52. A fastening nut 55 is rotatably connected to the outer side of the screw cylinder 513. A first guide slide rail 56 is provided on the upper part of the outer wall of the fastening nut 55. A telescopic spring 515 is sleeved inside the fixing block 51. One end of the telescopic spring 515 is fixedly installed on one end of the fastening nut 55.

[0028] One end of the telescopic spring 515 is fixedly installed with a telescopic rod 514, and one end of the telescopic rod 514 is fixedly installed with a connecting block 57. A sealing cover 512 is slidably sleeved on the outer side of the telescopic rod 514. One end of the sealing cover 512 is fixedly installed on one side of the telescopic sleeve 52. One end of the connecting block 57 is fixedly installed with a first semi-annular piece 58 and a second semi-annular piece 59 respectively. A cleaning brush 510 is fixedly installed on the inner wall of the first semi-annular piece 58 and the second semi-annular piece 59. The cleaning brush 510 has two semi-annular structures, and the inner wall of the cleaning brush 510 contacts the outer surface of the hole-making tool body 1 and the spiral chip removal groove 2.

[0029] In use, firstly, the fixing block 51 is fixedly sleeved onto the connecting end body 4 to achieve overall positioning, providing an installation base for the entire cleaning assembly 5. When the drilling tool body 1 has completed drilling into the aerospace composite material and is preparing to drill a new hole, the operator can reciprocate the first semi-annular plate 58 and the second semi-annular plate 59 while the drilling equipment is running at low speed or stopped, thereby driving the connecting block 57 and the cleaning brush 510 to move synchronously. At this time, the cleaning brush 510 will wipe the outer surface of the drilling tool body 1, the spiral chip removal groove 2 and the docking post 3, cleaning the debris and fine particles attached to the inner surface of the spiral chip removal groove 2. During the movement of the cleaning brush 510 and the two semi-annular plates, the telescopic rod 514 will be further driven to move accordingly inside the telescopic sleeve 52, thereby causing the telescopic spring 515 to stretch and contract. With the help of the elastic force of the telescopic spring 515, when the cleaning brush 510 is not in working state, it will be close to one side of the connecting end body 4 along with the two semi-circular pieces. Through the cleaning component 5, during the drilling of new holes, it is prevented that small debris particles will still be attached to the outer surface of the drilling tool and the chip removal groove. The cleaning brush 510 will wipe the outer surface of the drilling tool body 1, the spiral chip removal groove 2 and the docking post 3, and clean the debris and fine particles attached to the inner surface of the spiral chip removal groove 2, thereby preventing the residual fine debris particles from scratching the hole wall of the new hole.

[0030] Example 2:

[0031] Reference Figures 3 to 4 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a guide rod 54 is fixedly installed on the upper end of the connecting block 57, the guide rod 54 is slidably sleeved inside the second guide slide rail 511 of the fixed block 51, the guide rod 54 is slidably sleeved inside the first guide slide rail 56 of the fastening nut 55, and the guide rod 54 is located on one side of the outer wall of the telescopic sleeve 52.

[0032] In use, when the cleaning brush 510, the two semi-annular pieces, and the connecting block 57 of the cleaning component 5 move up and down, they will simultaneously drive the guide rod 54 to move up and down. During the sliding process, the first guide rail 56 and the second guide rail 511 form a double limit and guide for the guide rod 54, restricting the guide rod 54 from any unnecessary movement except along the direction of the rail. This ensures that the connecting block 57 can only move stably along the preset trajectory, further preventing the telescopic rod 514 from shaking or shifting externally after it disengages from the telescopic sleeve 52. This ensures that the cleaning brush 510 and the two semi-annular pieces can always maintain horizontal and straight movement when they move outside the hole-making tool and the spiral chip removal groove 2, effectively preventing deviation.

[0033] The remaining structure is the same as that in Example 1.

[0034] 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 will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A drilling tool for aerospace composite materials with chip removal grooves, characterized in that: The device includes a hole-making tool body (1) and a connecting end body (4). The hole-making tool body (1) has a spiral chip removal groove (2) on its outer side. A docking post (3) is fixedly connected to one end of the hole-making tool body (1). A connector (31) is fixedly installed at one end of the docking post (3). The (311) of the docking post (3) is docked inside one end of the connecting end body (4). A cleaning component (5) is provided on the outer side of the hole-making tool body (1). The cleaning component (5) includes a fixing block (51), which is fixedly sleeved on the outer wall of one end of the connecting end body (4). A telescopic sleeve (52) is fixedly sleeved inside the fixing block (51), and a second guide rail (511) is provided inside the upper end of the fixing block (51).

2. The aerospace composite material drilling tool with chip removal groove according to claim 1, characterized in that, One end of the telescopic sleeve (52) is fixedly connected to a screw cylinder (513), and a fastening nut (55) is rotatably connected to the outside of the screw cylinder (513). A first guide slide rail (56) is provided on the upper part of the outer wall of the fastening nut (55). A telescopic spring (515) is sleeved inside the fixing block (51), and one end of the telescopic spring (515) is fixedly installed on one end of the fastening nut (55).

3. The aerospace composite material drilling tool with chip removal groove according to claim 2, characterized in that, One end of the telescopic spring (515) is fixedly installed with a telescopic rod (514), and one end of the telescopic rod (514) is fixedly installed with a connecting block (57). A sealing cover (512) is slidably sleeved on the outside of the telescopic rod (514), and one end of the sealing cover (512) is fixedly installed on one side of the telescopic sleeve (52).

4. The aerospace composite material drilling tool with chip removal groove according to claim 3, characterized in that, One end of the connecting block (57) is fixedly installed with a first semi-annular piece (58) and a second semi-annular piece (59). The inner walls of the first semi-annular piece (58) and the second semi-annular piece (59) are fixedly installed with cleaning brushes (510). The cleaning brushes (510) are two semi-annular structures. The inner walls of the cleaning brushes (510) contact the outer surfaces of the hole-making tool body (1) and the spiral chip removal groove (2).

5. A drilling tool for aerospace composite materials with chip removal grooves according to claim 3, characterized in that, A guide rod (54) is fixedly installed on the upper end of the connecting block (57), and the guide rod (54) is slidably sleeved inside the second guide rail (511) of the fixed block (51).

6. A drilling tool for aerospace composite materials with chip removal grooves according to claim 5, characterized in that, The guide rod (54) is slidably sleeved inside the first guide rail (56) of the fastening nut (55), and the guide rod (54) is located on one side of the outer wall of the telescopic sleeve (52).

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