Drill bit for processing high-strength carbon fiber composite material

Abstract

The utility model belongs to the technical field of drill bits, and particularly relates to a drill bit for machining high-strength carbon fiber composites, which comprises a drill bit cutter handle, a drill bit cutter head is fixed at one end of the drill bit cutter handle, and a chamfering mechanism for chamfering the high-strength carbon fiber composites is fixed on the outer surface of the drill bit cutter handle. The chamfering cutter on the cutter handle of the drill bit makes contact with a workpiece, then chamfering operation is carried out on a drilling position, the drill bit does not need to be detached for replacement, use is convenient, when the chamfering cutter needs to be replaced, the fixing screw arranged on the fixing ring can be screwed off, then fixing of the chamfering cutter is relieved, and under the cooperation of the clamping groove and the clamping block, the chamfering cutter can be conveniently replaced. Therefore, the chamfering tool can be conveniently replaced and maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drill bit, in particular to a drill bit for processing high-strength carbon fiber composite material belongs to drill bit technical field. BACKGROUND

[0002] High-strength carbon fiber composite material, such as carbon fiber reinforced composite material CFRP, has been widely used in aerospace, automobile, sports equipment and other fields due to its light weight, high strength, high heat resistance and other characteristics. However, due to its high hardness, flammability and internal unevenness, problems such as wire drawing, separation and cracking may occur during processing, so a special drill bit is needed to ensure processing quality and efficiency. Designed specifically for processing carbon fiber composite material, it has high hardness and wear resistance, ensuring drilling accuracy and efficiency.

[0003] In the prior art, such as the saw drill integrated drill bit disclosed in the publication number CN221697172U, it includes a drill handle and a drill bit main body, the end of the drill bit main body is provided with a blade part installed with cutting teeth, the blade part is annular, and the blade part is welded with combined cutting teeth of tungsten carbide alloy at intervals, each cutting tooth has a plurality of chamfered relief structures, the rake angle of each cutting tooth is 5 degrees, and the relief angle is 65 degrees. It has a sharp blade edge, fast drilling speed, and the sawing function of the drill bit allows the fibers to be smoothly cut to ensure that the material layer does not separate, improve the hole wall processing quality, balance the wear resistance of the blade edge, and improve the service life of the drill bit.

[0004] Although the above technical solution uses the sawing function of the drill bit to smoothly cut the fibers to ensure that the material layer does not separate, improve the hole wall processing quality, balance the wear resistance of the blade edge, and improve the service life of the drill bit, during drilling of carbon fiber composite material, a drill bit with appropriate diameter needs to be selected for drilling, and after drilling, an inverted bevel needs to be formed at the hole site. However, drilling and inverted bevel are two steps, tool replacement is required, and after tool replacement, the Z-axis needs to be recalibrated, which is very inconvenient, the drilling processing efficiency is low, and therefore, a drill bit for processing high-strength carbon fiber composite material is provided to overcome the above defects. UTILITY MODEL CONTENTS

[0005] The utility model provides a drill bit for processing high-strength carbon fiber composite material to solve the problem of two steps of drilling and inverted bevel, tool replacement and recalibration of the Z-axis after tool replacement, which is very inconvenient and low in drilling processing efficiency.

[0006] The utility model realizes the above-mentioned purpose through the following technical scheme: a drill bit for processing high-strength carbon fiber composite material, including drill bit handle, the one end of drill bit handle is fixed with drill bit nose, the outer surface of drill bit handle is fixed with the chamfering mechanism for chamfering high-strength carbon fiber composite material, the other end of drill bit handle is equipped with the cooling mechanism for cooling drill bit;

[0007] The chamfering mechanism comprises a fixing ring fixed on the outer surface of the drill shank, two clamping grooves symmetrically formed on one side of the fixing ring, a clamping block inserted and connected in each of the clamping grooves, a chamfering cutter fixed on the right side of the clamping block, and two fixing screws installed in the fixing ring and threadedly connected with the chamfering cutter.

[0008] Preferably, the outer surface of the drill head is provided with a chip removal groove.

[0009] Preferably, the cooling mechanism comprises a water inlet pipe connected to the other end of the drill shank.

[0010] Preferably, the end of the water inlet pipe is fixed with a limiting ring, and the drill shank is provided with an installation cavity.

[0011] Preferably, the outer surface of the limiting ring is rotatably connected with a limiting groove formed in the inner wall of the drill shank.

[0012] Preferably, the outer surface of the water inlet pipe is sleeved with a fixed bearing fixedly connected with the inner wall of the drill shank.

[0013] Preferably, the inner part of the drill head and the drill shank is provided with a flow cavity, and the end of the drill head is provided with a water jet hole communicating with the flow cavity.

[0014] The chamfering cutter on the drill shank contacts with the workpiece, thereby chamfering the drilling hole without the need of dismounting and replacing the drill, facilitating use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is a sectional structure schematic diagram of the drill shank of the utility model;

[0017] Figure 3 It is a three-dimensional structure schematic diagram of the drill shank of the utility model;

[0018] Figure 4 It is an enlarged view of A in the utility model; Figure 2

[0019] ​In the diagram: 1. Drill bit holder; 2. Drill bit head; 3. Retaining ring; 31. Slot; 32. Locking block; 33. Chamfering cutter; 34. Fixing screw; 4. Chip removal groove; 5. Water inlet pipe; 51. Limiting ring; 52. Mounting cavity; 53. Limiting groove; 54. Fixed bearing; 6. Flow cavity; 7. Water spray hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1, as Figures 1 to 4 As shown, a drill bit for processing high-strength carbon fiber composites includes a drill bit holder 1, a drill bit 2 fixed at one end of the drill bit holder 1, a chamfering mechanism for chamfering the high-strength carbon fiber composites fixed on the outer surface of the drill bit holder 1, and a cooling mechanism for cooling the drill bit at the other end of the drill bit holder 1.

[0022] The chamfering mechanism includes a retaining ring 3, which is fixed to the outer surface of the drill bit holder 1. Two symmetrical slots 31 are formed on one side of the retaining ring 3, and each slot 31 contains a retaining block 32. A chamfering cutter 33 is fixed to the right side of each retaining block 32. Two fixing screws 34 are installed inside the retaining ring 3, and the ends of both screws 34 are threadedly connected to the chamfering cutter 33. A chip removal groove 4 is formed on the outer surface of the drill bit 2. The machine tool drives the drill bit holder 1 to rotate, thereby rotating the drill bit 2 to perform drilling on the workpiece. The chip removal groove 4 on the upper part can discharge the waste chips generated during processing to the outside, which is convenient for use. After the workpiece is drilled, the drive equipment mechanically feeds the drill bit 2, so that the chamfering cutter 33 on the drill bit holder 1 contacts the workpiece, and then performs chamfering operation on the drilled part. There is no need to remove the drill bit for replacement, which is convenient for use. When it is necessary to replace the chamfering cutter 33, the fixing screw 34 on the fixing ring 3 can be unscrewed to release the fixation of the chamfering cutter 33. With the cooperation of the slot 31 and the locking block 32, the chamfering cutter 33 can be disassembled for easy replacement and maintenance.

[0023] Example 2, in addition to all the technical features of Example 1, also includes: a cooling mechanism comprising a water inlet pipe 5 connected to the other end of the drill bit holder 1, a limit ring 51 fixed to the end of the water inlet pipe 5, an installation cavity 52 formed inside the drill bit holder 1, a limit groove 53 formed on the inner wall of the drill bit holder 1 rotatably connected to the outer surface of the limit ring 51, a fixed bearing 54 fixedly connected to the inner wall of the drill bit holder 1 fitted on the outer surface of the water inlet pipe 5, and flow cavities 6 formed inside both the drill bit 2 and the drill bit holder 1. The end is provided with a water spray hole 7 that communicates with the flow chamber 6. The water inlet pipe 5 on the drill bit is connected to the external water supply pipe, so that external water can enter the installation cavity 52 and then be sprayed out from the water spray hole 7 at the end of the drill bit 2 through the flow chamber 6, thereby cooling the drill bit 2. During drilling, the sprayed water flows out from the hole to the outside, which can remove the waste chips generated during drilling. The limiting ring 51 and the limiting groove 53 can play a limiting role. The fixed bearing 54 can ensure that the water inlet pipe 5 will not rotate when the drill bit handle 1 rotates.

[0024] Before using this high-powered drill bit, first connect and fix the drill bit holder 1 to the output end of the machine tool. The machine tool drives the drill bit holder 1 to rotate, which in turn drives the drill bit 2 to rotate, drilling the workpiece. The chip removal groove 4 on the drill bit 2 allows the chips generated during processing to be discharged to the outside, facilitating use. After the workpiece is drilled, the drive equipment mechanically feeds the drill bit 2, causing the chamfering cutter 33 on the drill bit holder 1 to contact the workpiece, thereby performing a chamfering operation on the drilled area. There is no need to remove the drill bit for replacement, making it convenient to use. When it is necessary to replace the chamfering cutter 33, the fixing screw 34 on the fixing ring 3 can be unscrewed to release the chamfering cutter. The chamfer cutter 33 is fixed in place by the cooperation of the slot 31 and the block 32, which allows the chamfer cutter 33 to be disassembled for easy replacement and maintenance. The water inlet pipe 5 on the drill bit is connected to the external water supply pipe, allowing external water to enter the mounting cavity 52 and then be sprayed out from the water spray hole 7 at the end of the drill bit 2 through the flow cavity 6, thereby cooling the drill bit 2. During drilling, the sprayed water flows out from the hole to the outside, which can remove the waste chips generated during drilling. The limit ring 51 and the limit groove 53 can play a limiting role. The fixed bearing 54 can ensure that the water inlet pipe 5 will not rotate when the drill bit handle 1 rotates, ensuring normal water supply.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those 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 can be understood by those skilled in the art.

Claims

1. A drill bit for machining high-strength carbon fiber composite material, comprising a drill shank (1), characterized in that: One end of the drill holder (1) is fixed with a drill head (2), the outer surface of the drill holder (1) is fixed with a chamfer mechanism for chamfering high-strength carbon fiber composite material, the other end of the drill holder (1) is provided with a cooling mechanism for cooling the drill bit; The chamfer mechanism comprises a fixed ring (3), the fixed ring (3) is fixed on the outer surface of the drill holder (1), two clamping grooves (31) are symmetrically formed on one side of the fixed ring (3), a clamping block (32) is insertedly connected in each of the two clamping grooves (31), a chamfering cutter (33) is fixed on the right side of the clamping block (32), two fixed screws (34) are installed in the fixed ring (3), and the distal ends of the two fixed screws (34) are threadedly connected with the chamfering cutter (33).

2. The drill bit of claim 1, wherein: The outer surface of the drill head (2) is provided with a chip removal groove (4).

3. The drill bit of claim 1, wherein: The cooling mechanism comprises a water inlet pipe (5), and the water inlet pipe (5) is connected to the other end of the drill holder (1).

4. The drill bit of claim 3, wherein: The distal end of the water inlet pipe (5) is fixed with a limiting ring (51), and the inner portion of the drill holder (1) is provided with a mounting cavity (52).

5. The drill bit of claim 4, wherein: The outer surface of the limiting ring (51) is rotatably connected with a limiting groove (53) formed in the inner wall of the drill holder (1).

6. The drill bit of claim 5, wherein: The outer surface of the water inlet pipe (5) is sleeved with a fixed bearing (54) fixedly connected with the inner wall of the drill holder (1).

7. The drill bit of claim 1, wherein: The inner portions of the drill head (2) and the drill holder (1) are both provided with a flow cavity (6), and the distal end of the drill head (2) is provided with a water injection hole (7) in communication with the flow cavity (6).

Images