PCD (Polycrystalline Diamond) counter boring cutter

Abstract

The utility model relates to the field of hole machining cutters, and discloses a PCD counter boring cutter which comprises a cutter handle, a counter boring cutter head and a positioning rod which are sequentially and coaxially arranged, the counter boring cutter head comprises a connecting part detachably connected with the cutter handle, a cutting part is arranged on one side of the connecting part, and at least one chip groove is formed in the cutting part. A wear-resistant cutting edge is arranged at the top of the side wall of the chip groove; the positioning rod is arranged in the middle of the end side of the cutting part, and a plurality of wear-resisting guide strips are arranged on the side wall of the positioning rod in the circumferential direction at intervals. When the composite material countersinking cutter is used for countersinking a composite material, the wear resistance of the cutter can be improved and the wear speed is reduced through the wear-resistant guide strips and the wear-resistant cutting edges, so that the service life is prolonged. And meanwhile, due to the design of the wear-resistant guide strip, the cutter can be prevented from swinging during deep hole machining, and the machining precision and the surface quality are improved.

Description

Technical Field

[0001] The utility model relates to the field of hole processing tools, in particular to a PCD countersinking tool. Background Art

[0002] The fuselage, wings, flaps, horizontal and vertical tails of advanced aircraft in the world are mostly made of composite material + aluminum alloy laminated materials. During assembly, a lot of holes need to be drilled, including countersinking holes, and then rivets are used for connection. The size of the countersinking holes must be highly precise, and the hole diameters on the two materials must be the same.

[0003] Currently, when using traditional countersinking tools to process the above materials, the following problems exist: (1) Composite materials have high abrasiveness, resulting in a very fast wear rate of the tool; (2) The interlayer strength of composite materials is low, and phenomena such as delamination and splitting are prone to occur during cutting, especially obvious during countersinking; (3) Due to high cutting temperatures and a large difference in the thermal expansion coefficients of the reinforcing fibers and the matrix resin, it is difficult to meet the requirements for the dimensional accuracy and surface roughness of the processed surface, and residual stress is likely to be generated. Summary of the Utility Model

[0004] Based on the above problems, the purpose of the present utility model is to provide a PCD countersinking tool to solve at least one of the above problems existing in the prior art.

[0005] The present utility model adopts the following technical solutions:

[0006] The present utility model provides a PCD countersinking tool, which includes a tool shank, a countersinking cutter head, and a positioning rod arranged coaxially in sequence; the tool shank is detachably connected to the countersinking cutter head, and the positioning rod is arranged in the middle of the side of the countersinking cutter head away from the tool shank;

[0007] The countersinking cutter head includes a connecting portion detachably connected to the tool shank. One side of the connecting portion is provided with a cutting portion, and at least one chip removal groove is arranged on the cutting portion. The top of the side wall of the chip removal groove is provided with a wear-resistant cutting edge;

[0008] The positioning rod is arranged in the middle of the end side of the cutting portion, and a plurality of wear-resistant guiding strips are arranged at intervals along the circumferential direction on the side wall of the positioning rod.

[0009] Further, the connecting portion includes a connecting rod. One side of the connecting rod is provided with a threaded section, and the other side is connected with a positioning column. The positioning column is connected to the middle of the end side of the cutting portion away from the positioning rod; the connecting portion is detachably connected to the tool shank through the threaded section and the positioning column.

[0010] Further, a positioning groove and a threaded hole that communicate with each other are sequentially arranged on one side of the tool shank. The positioning groove is in small clearance fit with the positioning post, and the threaded hole is in threaded fit with the threaded section.

[0011] Further, the number of the chip removal grooves is set to two, and the two chip removal grooves are correspondingly arranged on both sides of the cutting portion; the wear-resistant cutting edges are arranged on the top of the side wall of each chip removal groove, and the two wear-resistant cutting edges are arranged oppositely.

[0012] Further, both the wear-resistant cutting edge and the wear-resistant guiding strip are made of PCD material.

[0013] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:

[0014] When countersinking a composite material, by providing the wear-resistant guiding strip and the wear-resistant cutting edge, the wear resistance of the tool itself can be increased, the wear speed can be reduced, and thus the service life can be prolonged. At the same time, through the design of the wear-resistant guiding strip, the tool swing can be avoided during deep hole machining, and the machining accuracy and surface quality can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below with reference to the accompanying drawings.

[0016] Figure 1 is a schematic plan view of the PCD countersinking tool of the present utility model;

[0017] Figure 2 is a schematic three-dimensional view of the countersinking tool head of the present utility model;

[0018] Figure 3 is another schematic three-dimensional view of the countersinking tool head of the present utility model;

[0019] Figure 4 is a schematic plan sectional view of a part of the tool shank of the present utility model.

[0020] Description of the reference numerals: 1. Tool shank; 101. Positioning groove; 102. Threaded hole; 2. Countersinking tool head; 21. Connecting portion; 211. Connecting rod; 212. Threaded section; 213. Positioning post; 22. Cutting portion; 23. Chip removal groove; 24. Wear-resistant cutting edge; 3. Positioning rod; 4. Wear-resistant guiding strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] As Figures 1 - 4As shown in the figure, a PCD countersinking tool is disclosed in this embodiment, which includes a tool shank 1, a countersinking cutter head 2, and a positioning rod 3 arranged coaxially in sequence; the tool shank 1 is detachably connected to the countersinking cutter head 2, and the positioning rod 3 is arranged in the middle of the side of the countersinking cutter head 2 away from the tool shank 1; the countersinking cutter head 2 includes a connecting portion 21 detachably connected to the tool shank 1, a cutting portion 22 is arranged on one side of the connecting portion 21, at least one chip removal groove 23 is arranged on the cutting portion 22, and a wear-resistant cutting edge 24 is arranged at the top of the side wall of the chip removal groove 23; the positioning rod 3 is arranged in the middle of the end side of the cutting portion 22, and a plurality of wear-resistant guiding strips 4 are evenly distributed along the circumferential direction on the side wall of the positioning rod 3.

[0023] In this embodiment, the connecting portion 21, the cutting portion 22, and the positioning rod 3 are of an integral structure, and their material is steel; the number of chip removal grooves 23 is set to two, and the two chip removal grooves 23 are correspondingly arranged on both sides of the cutting portion 22; wear-resistant cutting edges 24 are arranged at the top of the side walls of each chip removal groove 23, and the two wear-resistant cutting edges 24 are arranged oppositely; the wear-resistant guiding strips 4 and the wear-resistant cutting edges 24 are both made of PCD material, and the wear-resistant guiding strips 4 are connected to the positioning rod 3 and the wear-resistant cutting edges 24 are connected to the cutting portion 22 by welding.

[0024] Adopting this solution, when countersinking the composite material, through the arranged wear-resistant guiding strips 4 and wear-resistant cutting edges 24, the wear resistance of the tool itself can be increased, the wear speed can be reduced, and thus the service life can be prolonged. At the same time, through the design of the wear-resistant guiding strips 4, the tool swing can be avoided during deep hole processing, and the processing accuracy and surface quality can be improved.

[0025] In a further optimized solution, the connecting portion 21 includes a connecting rod 211, a threaded section 212 is arranged on one side of the connecting rod 211, and a positioning column 213 is fixedly connected to the other side. The positioning column 213 is fixedly connected to the middle of the end side of the cutting portion 22 away from the positioning rod 3; the connecting portion 21 is detachably connected to the tool shank 1 through the threaded section 212 and the positioning column 213.

[0026] Specifically, a positioning groove 101 and a threaded hole 102 that are communicated with each other are sequentially arranged on one side of the tool shank 1. The positioning groove 101 has a small clearance fit with the positioning column 213, and the threaded hole 102 is threadedly adapted to the threaded section 212.

[0027] Adopting this solution, by threadedly connecting the threaded hole 102 on the tool shank 1 with the threaded section 212 on the connecting rod 211, the detachable connection between the tool shank 1 and the connecting portion 21 can be realized; by adopting a small clearance fit between the positioning groove 101 and the positioning column 213, the coaxial connection between the tool shank 1 and the connecting portion 21 can be ensured.

[0028] When the utility model is in use, first, the connection between the tool handle 1 and the countersinking cutter head 2 is carried out. One side of the connecting rod 211 with a threaded section 212 is inserted into the end of the threaded hole 102 through the positioning groove 101 on the tool handle 1, and then the tool handle 1 is rotated to screw the threaded section 212 into the threaded hole 102. After the threaded section 212 is connected to the threaded hole 102, the positioning groove 101 just sleeved on the outer periphery of the positioning column 213, and there is a small clearance fit between the positioning groove 101 and the positioning column 213. Then, the side of the tool handle 1 away from the positioning groove 101 is sleeved on the main shaft of the machine tool, and the two are connected by a threaded connection method. The machine tool drives the tool handle 1, the countersinking cutter head 2 and the positioning rod 3 to rotate as a whole.

[0029] The above-described embodiments are only descriptions of the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. A PCD countersinking tool, characterized in that: It includes a tool shank (1), a countersinking cutter head (2) and a positioning rod (3) which are coaxially arranged in sequence; the tool shank (1) is detachably connected to the countersinking cutter head (2), and the positioning rod (3) is arranged in the middle of the side of the countersinking cutter head (2) away from the tool shank (1). The countersinking cutter head (2) includes a connecting portion (21) detachably connected to the tool shank (1). One side of the connecting portion (21) is provided with a cutting portion (22), at least one chip removal groove (23) is arranged on the cutting portion (22), and a wear-resistant cutting edge (24) is arranged at the top of the side wall of the chip removal groove (23). The positioning rod (3) is arranged in the middle of the end side of the cutting portion (22), and a plurality of wear-resistant guiding strips (4) are circumferentially and spacedly arranged on the side wall of the positioning rod (3).

2. The PCD countersinking tool according to claim 1, wherein: The connecting portion (21) includes a connecting rod (211). A threaded section (212) is arranged on one side of the connecting rod (211), and a positioning column (213) is connected to the other side. The positioning column (213) is connected to the middle of the end side of the cutting portion (22) away from the positioning rod (3); the connecting portion (21) is detachably connected to the tool shank (1) through the threaded section (212) and the positioning column (213).

3. The PCD countersinking tool according to claim 2, characterized in that: A positioning groove (101) and a threaded hole (102) which are communicated with each other are sequentially arranged on one side of the tool shank (1). The positioning groove (101) is in small clearance fit with the positioning column (213), and the threaded hole (102) is threadedly adapted to the threaded section (212).

4. The PCD countersinking tool according to claim 1, wherein: The number of the chip removal grooves (23) is set to two, and the two chip removal grooves (23) are correspondingly arranged on both sides of the cutting portion (22); the wear-resistant cutting edge (24) is arranged at the top of the side wall of each chip removal groove (23), and the two wear-resistant cutting edges (24) are arranged oppositely.

5. The PCD countersinking tool according to claim 1, characterized in that: Both the wear-resistant cutting edge (24) and the wear-resistant guiding strip (4) are made of PCD material.

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