High-efficiency special drilling head for drilling holes in carbon fiber composite material

A composite material and carbon fiber technology, applied in the field of high-efficiency special drills and multi-blade tools, can solve problems such as delamination and burr defects, and achieve the effect of reducing delamination defects, improving processing efficiency and reducing use costs.

Active Publication Date: 2015-10-28
DALIAN UNIV OF TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the problems that carbon fiber composite materials are prone to delamination and burr defects in hole making, and to invent a hole making tool for carbon fiber composite materials, especially high-performance carbon fiber composite materials

Method used

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  • High-efficiency special drilling head for drilling holes in carbon fiber composite material
  • High-efficiency special drilling head for drilling holes in carbon fiber composite material
  • High-efficiency special drilling head for drilling holes in carbon fiber composite material

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Embodiment Construction

[0013] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and technical solutions.

[0014] like figure 1 , figure 2 , image 3 The high-efficiency special drill shown is divided into three parts: the main cutting area A, the auxiliary cutting area B and the tool holder C. There is also a micro-tooth cutting area composed of several micro-tooths X at the junction of the main cutting area A and the auxiliary cutting area B. d. The drill bit can be divided into five stages during the drilling process. The first stage is extrusion. The chisel edge a contacts and squeezes the workpiece. Due to the extrusion effect of the chisel edge, the axial thrust increases rapidly; the second stage is extrusion. Pressing and drilling, at this time the first main cutting edge 1 enters the material, begins to remove material, and the thrust increases in a small range; the third stage is drilling, at this time, ...

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Abstract

The invention belongs to the technical field of drilling and cutting tools in mechanical processing, and relates to a high-efficiency special drilling head for drilling holes in a carbon fiber composite material. A cutter is the multiple-cutting-edge cutter with double vertex angles and a micro tooth structure and particularly suitable for the one-time high-quality high-efficiency processing of the high-performance carbon fiber reinforced composite material. The drilling head consists of a main cutting region, an assistant cutting region and a cutter handle, wherein a micro tooth cutting region is arranged at a connecting position of the main cutting region and the assistant cutting region; the main cutting region consists of a first main cutting edge and a second main cutting edge; in the assistant cutting region, a left-hand thread is formed in an assistant cutting edge; the micro tooth cutting region consists of a plurality of micro teeth. According to the high-efficiency special drilling head disclosed by the invention, the double vertex angles and the micro tooth structure are utilized, so that a function of integrated processing of drilling-expanding-reaming is realized, the axial force of the drilling and the cutting is reduced, layered defects are overcome, the holes with high size accuracy are obtained, the service life of the drilling head is prolonged, the situation that the cutter is frequently replaced is avoided, and the processing efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of drilling tools in mechanical processing, and relates to a high-efficiency special drill bit for making holes in carbon fiber composite materials. One-shot high-quality, high-efficiency machining of composite materials. Background technique [0002] Carbon fiber composites have excellent comprehensive properties such as high specific strength, high specific stiffness, fatigue resistance, corrosion resistance and excellent designability, and are widely used in aerospace structural design. Drilling is one of the heaviest machining operations in the manufacture of carbon fiber composite parts. For example, a Boeing 747 aircraft has more than three million connecting holes. However, due to the low interlayer strength of the material, it is very easy to produce defects such as delamination and tearing at the exit during drilling, and the thermal conductivity of the matrix phase is not good, and the hardness of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/08
CPCB23B51/08B23B2226/275B23B2251/04B23B2251/408
Inventor 王福吉何春伶贾振元付饶钱宝伟
Owner DALIAN UNIV OF TECH
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