CN205183873U - A cutter that is used for layered materials drilling of carbon -fibre composite aluminum alloy to process - Google Patents

Abstract

The utility model discloses a cutting tool used for drilling of laminated materials of carbon fiber composite aluminum alloy, comprising a working part and a handle part, the working part includes a drilling working part arranged at the front end, and the drilling working part includes The first drilling working part and the second drilling working part of the front end, the first drilling point angle of the first drilling working part is 118 °, and the second drilling point angle of the second drilling working part is 15 °. The drill point angle is the vertex angle of the rotating cone surface of the cutting edge of the tool. The drilling tool of the utility model can not only effectively reduce defects such as material burns, delamination, burrs, and tears in the carbon fiber composite material layer, but also ensure good hole wall smoothness and hole diameter accuracy of the aluminum alloy material layer, which can be more It is a special tool suitable for overall drilling of carbon fiber composite material-aluminum alloy laminated materials after assembly.

Description

Tools for drilling laminates in carbon fiber composite aluminum alloys

technical field

The utility model relates to machining equipment, in particular to a drilling tool.

Background technique

With the continuous development of the aerospace industry, many products have put forward high-strength and lightweight requirements for materials. The laminate of carbon fiber composite material + aluminum alloy has the advantages of light weight, high strength, high wear resistance, good fatigue resistance, and high temperature resistance. Therefore, the laminate of carbon fiber composite material + aluminum alloy is being widely used in aviation Aerospace, and hole making is an important part of aerospace technology, so choosing the right cutting tools and tools is the most important thing to ensure the quality of hole making.

At present, the existing technology is to separate the two layers of materials to make the initial hole, and then combine the two layers of materials, and hinge to the final hole bit by bit, which is inefficient. Since the parameters of the drilling tools applicable to the two layers of material are different, if any tool suitable for a certain layer of material is used to make holes uniformly, it will cause defects when drilling another layer of material, the tool life is short, and the drilled Poor hole quality. Carbon fiber composite materials are prone to defects such as material burns, delamination, burrs, tears, etc., while aluminum will have poor hole wall finish and out-of-tolerance hole diameters, resulting in unqualified products, etc., which will bring greater cost pressure to customers; At the same time, there are many cutting steps on the cutting tool, fast cutting tool wear, and high cost due to the number of cutting tools.

Utility model content

The technical problem to be solved by the utility model is to provide a special cutting tool that is better suitable for the overall drilling of the carbon fiber composite material-aluminum alloy laminated material after assembly, which can effectively reduce the occurrence of material burns on the carbon fiber composite material layer , delamination, burrs, tears and other defects, and can ensure good hole wall finish and hole diameter accuracy of the aluminum alloy material layer.

For solving the problems of the technologies described above, the technical scheme of the utility model is as follows:

A cutting tool for drilling laminated materials of carbon fiber composite aluminum alloy, including a working part and a handle, the working part includes a drilling working part arranged at the front end, and the material of the cutting tool is selected as a whole hard alloy, the drilling working part includes a first drilling working part arranged at the front end and a second drilling working part at the rear end of the first drilling working part, and the first drilling working part of the first drilling working part The drill point angle is 118°, the second drill point angle of the second drilling part is 15°, and the drill point angle is the vertex angle of the rotating cone surface of the cutting edge of the tool.

The relief angle of the cutter is preferably set to 18°.

The axial length of the first drilling working portion is preferably 2.0 mm.

The helix angle of the cutter is preferably 10°.

The cutting tool of the utility model is firstly made of integral hard alloy, which has good rigidity and dimensional accuracy, so as to ensure the processing quality of drilling. In the design of tool size, many factors have an impact on the drilling quality. In order to reduce the propulsion force and avoid the tearing of fiber materials, the drill point angle must be reduced, but for the tool life and the drilling quality of aluminum materials must be increased. Large drill point angle, there is a contradiction between the two, so it is very difficult to choose a suitable tool drill type, because the two materials show completely different characteristics in the cutting process (aluminum alloy has good thermal conductivity for machining The holes that come out will generally become larger due to thermal expansion, and the requirements for chip removal and chip breaking are very high; while carbon fiber composite materials have poor thermal conductivity, shrinkage cavities will appear during processing, and chip removal does not need to be considered; at the same time, the wear resistance of the tool is also very important. A larger angle of question the better the wear resistance). Composite materials are usually drilled with long cutting edges because the carbon fiber should be sheared along the cutting edge, and the long cutting edge needs to be achieved with a small drill point angle. It is well known that point angles lower than 90° or higher than 150° can help reduce the burr height at the exit of the drilled hole. Therefore, double drill tip angles are designed, the first drill tip angle is 118°, and the second drill tip angle is 15°. In addition, the drilling of composite materials should also reduce the axial force to avoid lamination of the processed material during tool retraction. This feature can be used with a very sharp cutting edge geometry, and the relief angle is set to 18° (the standard drill relief angle is generally 8-14°, and the large relief angle can reduce the heat on the flank surface and reduce the wear of the flank due to high temperature ).

When the relief angle is 18°, the helix angle is about 10°, and the axial length of the first drilling working part is 2.0mm, the overall cutting performance and processing quality of the tool are the best.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of a cutting tool of the utility model for drilling of laminated materials of carbon fiber composite aluminum alloy.

In the picture:

Working part 1 Shank part 2 Drilling working part 101

The first drilling working part 1011 and the second drilling working part 1012

First drill point angle α Second drill point angle β

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

Fig. 1 shows a kind of cutter for the laminated material drilling processing of carbon fiber composite material aluminum alloy, comprises working part 1 and handle part 2, and described working part 1 comprises the drilling working part 101 that is arranged on the front end, The material of the cutter is solid carbide, and the drilling working part 101 includes a first drilling working part 1011 arranged at the front end and a second drilling working part 1012 at the rear end of the first drilling working part, The first drill point angle α of the first drilling working part 1011 is 118 °, and the axial length of the first drilling working part is 2 mm (of course, the axial length can also be Adaptive adjustment); the second drill point angle β of the second drilling working part 1012 is 15°, and the drill point angle is the apex angle of the rotating cone surface of the cutting edge of the tool.

The relief angle of the tool is set to 18°, and the relief angle refers to the angle between the flank of the tool and the vertical plane. The helix angle of the tool is 10°, and the helix angle is also called the chip flute helix angle, which is the acute angle between the tangent of the tool cylindrical helix and the cylindrical surface passing the tangent point.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (5)

1. A cutting tool for drilling of laminated materials of carbon fiber composite aluminum alloy, comprising a working part and a handle, and the working part includes a drilling working part arranged at the front end, characterized in that: the cutting tool The material selection solid carbide, the drilling working part includes the first drilling working part arranged at the front end and the second drilling working part at the rear end of the first drilling working part, the first drilling working part The first drill point angle of the hole working part is 118°, the second drill point angle of the second drilling part is 15°, and the drill point angle is the apex angle of the rotating cone surface of the cutting edge of the tool . 2 . The cutting tool for drilling carbon fiber composite aluminum alloy laminated materials according to claim 1 , wherein the relief angle of the cutting tool is set to 18°. 3 . 3. The cutting tool for drilling carbon fiber composite aluminum alloy laminated materials according to claim 1 or 2, characterized in that: the axial length of the first drilling working part is 2.0mm. 4. The cutting tool for drilling carbon fiber composite aluminum alloy laminated materials according to claim 1 or 2, characterized in that: the helix angle of the cutting tool is 10°. 5. The cutting tool for drilling carbon fiber composite aluminum alloy laminated materials according to claim 3, characterized in that: the helix angle of the cutting tool is 10°.