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Multi-step multi-edge gradient micro toothed cutter for drilling carbon fiber reinforced plastics

A composite material, multi-step technology, applied in the direction of tools for lathes, manufacturing tools, accessories of tool holders, etc., can solve the problems of low carbon fiber with interlayer strength, delamination, tearing and burrs, and difficult to guarantee processing quality. , to achieve the effect of improving removal efficiency, improving processing efficiency and reducing axial force

Active Publication Date: 2017-11-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because CFRP has the characteristics of heterogeneity, anisotropy, low interlayer strength and high carbon fiber hardness, it is prone to processing defects such as delamination, tearing and burrs during machining, especially during drilling, and these processing The existence of defects makes it difficult to guarantee the processing quality, which seriously affects the connection strength and fatigue life of CFRP load-bearing structural parts
At present, the drilling technology mainly reduces the occurrence of delamination and tearing defects by reducing the length of the chisel edge of the tool and increasing the support on the exit side of the carbon fiber composite material, but it cannot effectively deal with the burr defects that have occurred during the drilling process. It is removed by the same drilling process, and it is impossible to trim the hole wall quality while removing the burrs. Therefore, in actual processing, most of the subsequent processing steps are used to remove the burrs, and then the hole wall quality trimming process is performed to ensure reasonable accuracy. Hole wall quality, which greatly reduces hole making efficiency

Method used

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  • Multi-step multi-edge gradient micro toothed cutter for drilling carbon fiber reinforced plastics
  • Multi-step multi-edge gradient micro toothed cutter for drilling carbon fiber reinforced plastics
  • Multi-step multi-edge gradient micro toothed cutter for drilling carbon fiber reinforced plastics

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Embodiment

[0019] A multi-step multi-blade gradient micro-tooth tool for hole making of carbon fiber composite materials, including a straight-edged drilling area, a reaming area, a trimming area and a handle 8, the outer diameter of the front end of the reaming area and the straight-edged drilling area The outer diameter of the rear end is the same as that of the trimming area;

[0020] The straight edge drilling area has four parts: chisel edge 1, main cutting edge 2, minor cutting edge 3 and drilling flute 10, and the two ends of chisel edge 1 are respectively connected with two main cutting edges 2; Four minor cutting edges 3 are evenly distributed in the circumferential direction, two of which are respectively connected to the outer endpoints of the two major cutting edges 2, and there are drilling chip removal grooves 10 between adjacent two minor cutting edges 3;

[0021] The reaming area has two parts, the reaming cutting edge 4 and the reaming chip removal groove 9. Along the ci...

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Abstract

The invention provides a multi-step multi-edge gradient micro toothed cutter for drilling carbon fiber reinforced plastics, which belongs to the technical field of composite material machining. The multi-step multi-edge gradient micro toothed cutter is composed of a straight-edge drilling area, a reaming area, a trimming area and a cutter handle, wherein the straight-edge drilling area is provided with a cross edge, main cutting edges, secondary cutting edges and drilling chip grooves, the reaming area is provided with reaming cutting edges and reaming chip grooves, the trimming area is provided with rhombic micro cutting units, right-handed rotating chip grooves and left-handed rotating chip grooves, the rhombic micro cutting units are structurally divided into micro toothed main cutting edges and micro toothed secondary cutting edges, and the sizes of the rhombic micro cutting units are gradually increased in the direction of the right-handed rotating spiral line. The multi-step multi-edge gradient micro toothed cutter is a complete tool and has sufficient strength and rigidity, the drilling axial force is reduced, and additionally, the sizes of the rhombic micro cutting units are gradually increased, so that the deburring efficiency is greatly improved, the trimming quality of a processed hole wall is guaranteed, the transition of the machining process is smooth, and the machining efficiency is improved.

Description

technical field [0001] The invention relates to a multi-step multi-blade gradient micro-tooth cutter for hole-making of carbon fiber composite materials, belonging to the field of composite material machining. Background technique [0002] Carbon fiber composite material (CFRP) is a resin-based composite material with carbon fiber as reinforcement. It has excellent properties such as high specific strength, high specific modulus, corrosion resistance and strong designability, and is widely used in the aerospace field. Because CFRP has the characteristics of heterogeneity, anisotropy, low interlayer strength and high carbon fiber hardness, it is prone to processing defects such as delamination, tearing and burrs during machining, especially during drilling, and these processing The existence of defects makes it difficult to guarantee the processing quality, which seriously affects the connection strength and fatigue life of CFRP load-bearing structural parts. At present, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/00
CPCB23B27/005
Inventor 牛斌李帅张其存杨睿孙士勇
Owner DALIAN UNIV OF TECH
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