An indexable insert type flat bottom countersink drill based on carbon fiber aviation cutting

Abstract

The utility model belongs to the technical field of cutting tools, and in particular, relates to an indexable blade type flat-bottom countersink drill based on carbon fiber aviation cutting. The guide post of the existing countersink drill is interference fit with the cutter head through a cylindrical inner hole, which is not easy to disassemble. When the guide post part is worn, it is not easy to repair. Once the guide post is seriously worn, the countersink drill tool needs to be replaced, which increases the processing cost. The following scheme is proposed, including a countersink drill body, and a guide post replacement component and a blade transfer component located inside the countersink drill body; the guide post replacement component includes a guide post body. The utility model provides a guide post replacement component. When the guide post body needs to be replaced, the rotatable guide post body drives the threaded mounting block to rotate and disengage from the mounting seat. The first magnetic attraction ring and the second magnetic attraction ring are provided. Under the action of magnetic attraction, the guide post body and the countersink drill body can be tightened and limited to avoid the phenomenon of loose installation of the guide post body during use.

Description

Technical Field

[0001] The utility model relates to a flat bottom countersink, in particular to an indexable blade type flat bottom countersink based on carbon fiber aviation cutting, belonging to the technical field of cutting tools. Background Art

[0002] Carbon fiber composite materials are difficult to process. During the processing, they are prone to defects such as delamination, tearing, burrs, wire drawing, and collapse. It is difficult to control the size. The tool temperature is very high during processing, which is very easy to cause heat blockage, resulting in carbonization on the surface of the carbon fiber composite matrix, affecting the surface quality. Selecting suitable cutting tools and tool materials is of great significance to improving the durability of tools used in carbon fiber composite processing and the quality of cutting. Countersinks are needed for mechanical processing in many fields such as aerospace. Countersinks are a tool used to process the end faces and sides of holes. According to different needs, countersinks can be divided into many types, each type has its specific purpose, among which flat-bottomed countersinks are mainly used for countersinking cylindrical countersunk holes.

[0003] In the prior art, there is a countersink with a guide pin disclosed in the announcement number CN204657578U. The utility model has a tool handle and a tool head. The tool head end is provided with a guide pin. One end face of the guide pin is a plane, and the other end face is provided with a cylindrical inner hole. The cylindrical inner hole is interference fit with the tool head. The tool head is provided with a guide pin for guiding, so that the coaxiality between the processed chamfered conical surface and the bolt through hole is well guaranteed.

[0004] However, in actual use, the guide post of the above patent is interference fit with the cutter head through the cylindrical inner hole and is not easy to disassemble. In addition, since the guide post is in direct contact with the workpiece during the movement of the countersinking tool, the friction between the guide post and the workpiece is relatively large. Therefore, the guide post is prone to wear and is not easy to repair after wear. Once the guide post is severely worn, the countersinking tool needs to be replaced, which increases the processing cost. Utility Model Content

[0005] The utility model provides an indexable blade type flat bottom countersink drill based on carbon fiber aviation cutting to solve the problems that the guide post is interference fit with the cutter head through the cylindrical inner hole, is difficult to disassemble, is difficult to repair when the guide post part is worn, and once the guide post is seriously worn, the countersink drill tool needs to be replaced, which increases the processing cost.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions: an indexable blade type flat bottom countersink based on carbon fiber aviation cutting, comprising a countersink body, and a guide column replacement assembly and a blade indexing assembly located inside the countersink body;

[0007] The guide column replacement assembly includes a guide column body, a threaded mounting block is welded at the bottom of the guide column body, a first magnetic ring is fixedly connected to the bottom of the threaded mounting block, a mounting seat is opened at the top of the countersink body, a second magnetic ring is fixedly installed at the inner bottom of the mounting seat, and the guide column body is threadedly connected through the threaded mounting block, the mounting seat, the first magnetic ring and the countersink body.

[0008] As a further solution of the utility model: the blade transfer assembly includes a cutting blade, and the cutting blade is mounted on the end of the countersink body through a mounting bolt.

[0009] As a further solution of the utility model: a first cutting edge and a second cutting edge are provided on both sides of the cutting blade.

[0010] As a further solution of the utility model: a plurality of chip removal grooves are provided on the surface of the countersink body.

[0011] As a further solution of the utility model: the other end of the countersink body is fixedly connected with a drill shank.

[0012] As a further solution of the utility model: a drill shank seat is fixedly installed on the other end of the drill shank.

[0013] The beneficial effects of the utility model are:

[0014] 1. Through the provided guide post replacement assembly, when the guide post body needs to be replaced, the guide post body can be rotated to drive the threaded mounting block to rotate and be removed from the mounting seat, and the first magnetic attraction ring and the second magnetic attraction ring can be used to tighten and limit the guide post body and the countersink body under the action of magnetic attraction, so as to avoid the guide post body from being loosened during use. This setting can improve the problem that the existing guide post and the cutter head are not easy to disassemble, and the countersink tool is in direct contact with the workpiece during movement, resulting in a large friction between the guide post part and the workpiece, so the guide post part is prone to wear, and the guide post is not easy to repair after being worn. Once the guide post is seriously worn, the countersink drilling tool needs to be replaced, which increases the processing cost.

[0015] 2. Through the blade transfer assembly, if the cutting edge is worn during the processing, there is no need for special equipment to grind it. Just remove the two sets of mounting bolts, transfer the cutting blade or replace the cutting blade. There is no need to sharpen the cutting edge by means of sharpening. This can greatly reduce the sharpening time, reduce the reduction in processing accuracy due to sharpening, improve production efficiency, and also reduce the use cost of flat bottom countersinks;

[0016] 3. The chip groove is set to prevent the machining debris from being retained in the hole and help to discharge the chips smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the blade transfer assembly of the utility model;

[0019] Figure 3 This is a structural schematic diagram of the guide post replacement assembly of the utility model;

[0020] Figure 4 For this utility model Figure 3 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0021] In the figure: 1. drill shank seat; 2. drill shank; 3. countersink body; 4. guide post replacement assembly; 401. guide post body; 402. threaded mounting block; 403. first magnetic ring; 404. mounting seat; 405. second magnetic ring; 5. blade transfer assembly; 501. first cutting edge; 502. mounting bolt; 503. cutting blade; 504. second cutting edge; 6. chip groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1

[0023] like Figures 1 to 4 As shown, an indexable blade type flat bottom countersink based on carbon fiber aviation cutting includes a countersink body 3, and a guide post replacement assembly 4 and a blade indexing assembly 5 located inside the countersink body 3;

[0024] The guide post replacement assembly 4 includes a guide post body 401, a threaded mounting block 402 is welded at the bottom of the guide post body 401, a first magnetic ring 403 is fixedly connected to the bottom of the threaded mounting block 402, a mounting seat 404 is provided at the top of the countersink body 3, a second magnetic ring 405 is fixedly installed at the inner bottom of the mounting seat 404, and the guide post body 401 is threadedly connected to the countersink body 3 through the threaded mounting block 402, the mounting seat 404, the first magnetic ring 403, and the countersink body 3; through the set guide post replacement assembly 4, when the guide post body 401 needs to be replaced, the guide post body 401 can be rotated to drive the threaded mounting block 402 to rotate, And it comes out of the mounting seat 404, and cooperates with the first magnetic attraction ring 403 and the second magnetic attraction ring 405, which can tighten and limit the guide column body 401 and the countersink body 3 under the action of magnetic attraction, so as to avoid the loose installation of the guide column body 401 during use. This arrangement can improve the problem that the existing guide column and the tool head are not easy to disassemble, and the countersinking tool is in direct contact with the workpiece during movement, resulting in a large friction between the guide column part and the workpiece. Therefore, the guide column part is prone to wear, and the guide column is not easy to repair after wear. Once the guide column is seriously worn, the countersinking tool needs to be replaced, which increases the processing cost. Embodiment 2

[0025] In addition to all the technical features of the first embodiment, this embodiment also includes:

[0026] The blade transfer assembly 5 includes a cutting blade 503, which is mounted on the end of the countersink body 3 by means of mounting bolts 502. By means of the blade transfer assembly 5, if the cutting edge is worn during the machining process, no special equipment is required for grinding. Instead, only two sets of mounting bolts 502 need to be removed to transfer the cutting blade 503 or replace the cutting blade 503.

[0027] The first cutting edge 501 and the second cutting edge 504 are arranged on both sides of the cutting blade 503. This arrangement does not require sharpening of the cutting edge, can greatly reduce the sharpening time, reduce the reduction in processing accuracy due to sharpening, improve production efficiency, and also reduce the use cost of the flat bottom countersink.

[0028] The surface of the countersink body 3 is provided with a plurality of chip removal grooves 6. The chip removal grooves 6 can prevent machining debris from being retained in the hole and help to smoothly discharge the chips. Embodiment 3

[0029] In addition to all the technical features of the first embodiment, this embodiment also includes:

[0030] The other end of the countersink body 3 is fixedly connected with a drill shank 2 , which is mainly used to transmit torque and axial force and connect the countersink body 3 and the drill shank seat 1 .

[0031] A drill shank seat 1 is fixedly mounted on the other end of the drill shank 2. The drill shank seat 1 can be used to connect the countersink body 3, the drill shank 2 and the motor and ensure their tightness.

[0032] Working principle: When using the indexable blade flat-bottom countersink drill based on carbon fiber aviation cutting, through the set guide post replacement component 4, when the guide post body 401 needs to be replaced, the rotatable guide post body 401 drives the threaded mounting block 402 to rotate and disengage from the mounting seat 404, and the first magnetic attraction ring 403 and the second magnetic attraction ring 405 are provided. Under the action of magnetic attraction, the guide post body 401 and the countersink drill body 3 can be tightened and limited to avoid the loose installation of the guide post body 401 during use. This setting can improve the existing guide post and the tool head. It is difficult to disassemble, and the countersink drill tool is in direct contact with the workpiece during movement, resulting in a large friction between the guide post part and the workpiece. , so the guide column part is prone to wear and tear, and it is not easy to repair the guide column after wear. Once the guide column is seriously worn, the countersink drill tool needs to be replaced, which increases the problem of processing cost; through the blade transfer assembly 5, if the cutting edge is worn during the processing, no special equipment is required for grinding. It is only necessary to remove the two sets of mounting bolts 502, transfer the cutting blade 503 or replace the cutting blade 503. There is no need to sharpen the cutting edge by means of grinding, which can greatly reduce the grinding time, reduce the reduction in processing accuracy due to grinding, improve production efficiency, and also reduce the use cost of the flat bottom countersink; through the chip removal groove 6, it can prevent processing debris from being retained in the hole, and help to smoothly discharge the chips.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An indexable insert type flat bottom countersink drill based on carbon fiber aviation cutting, characterized in that: It comprises a countersink body (3), and a guide post replacement assembly (4) and a blade transfer assembly (5) located inside the countersink body (3); The guide post replacement assembly (4) comprises a guide post body (401), a threaded mounting block (402) being welded to the bottom of the guide post body (401), a first magnetic ring (403) being fixedly connected to the bottom of the threaded mounting block (402), a mounting seat (404) being provided at the top of the countersink body (3), a second magnetic ring (405) being fixedly mounted to the inner bottom of the mounting seat (404), and the guide post body (401) being threadedly connected to the threaded mounting block (402), the mounting seat (404), the first magnetic ring (403) and the countersink body (3).

2. The indexable insert type flat bottom countersink drill for cutting carbon fiber for aviation according to claim 1, characterized in that: The blade transfer assembly (5) comprises a cutting blade (503), and the cutting blade (503) is mounted on the end of the countersink body (3) via a mounting bolt (502).

3. The indexable insert type flat bottom countersink drill for cutting carbon fiber for aviation according to claim 2, characterized in that: A first cutting edge (501) and a second cutting edge (504) are provided on both sides of the cutting blade (503).

4. The indexable insert type flat bottom countersink drill for cutting carbon fiber for aviation according to claim 1, characterized in that: The surface of the countersink body (3) is provided with a plurality of groups of chip removal grooves (6).

5. The indexable insert type flat bottom countersink drill for cutting carbon fiber for aviation according to claim 1, characterized in that: The other end of the countersink body (3) is fixedly connected to a drill shank (2).

6. The indexable insert type flat bottom countersink drill for cutting carbon fiber for aviation according to claim 5, characterized in that: A drill shank seat (1) is fixedly mounted on the other end of the drill shank (2).

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