Multi-step multi-micro-blade drill bit for drilling carbon fiber reinforced plastics

A reinforced composite material and multi-step technology, applied in step drills, drilling/drilling equipment, drill repairing, etc., can solve problems such as delamination, burrs, tearing, etc., to reduce delamination and tear damage, improve Effect of Aperture Accuracy and Inlet Quality

Active Publication Date: 2016-11-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the problem that the outlet is prone to damage such as delamination, burrs, and tears in the one-time hole-making of large-size holes in large-thickness fiber-reinforced composite materials. Stepped multi-micro edge drill

Method used

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  • Multi-step multi-micro-blade drill bit for drilling carbon fiber reinforced plastics
  • Multi-step multi-micro-blade drill bit for drilling carbon fiber reinforced plastics
  • Multi-step multi-micro-blade drill bit for drilling carbon fiber reinforced plastics

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Embodiment Construction

[0028] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and technical solutions.

[0029] Such as figure 1 , figure 2 , a carbon fiber reinforced composite material hole-making multi-step multi-micro-edge drill shown in Figure 3 can be divided into a step cutting area A, a secondary cutting area B and a clamping area C, wherein the step cutting area A consists of two steps. Composition; from the drill tip to the clamping area, there are two ladder structures in sequence; each ladder structure is composed of a stepped main cutting area and a stepped auxiliary cutting area.

[0030] This drill bit has a micro-tooth cutting area E, which is located in the stepped cutting area A, and the micro-tooth cutting area E is composed of two-level micro-tooth structures; two-level micro-tooth structures are distributed sequentially from the drill tip to the clamping area; the second The j-level micro-too...

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Abstract

The invention relates to a multi-step multi-micro-blade drill bit for drilling carbon fiber reinforced composite plastics. The multi-step multi-micro-blade drill bit comprises a step cutting area, a micro-tooth cutting area, an auxiliary cutting area, an inverse taper area and a clamping area. The step cutting area is formed by n stages of stepped structures; each stage of stepped structure is formed by a step main cutting area and a step auxiliary area; the micro-tooth cutting area is located in the step cutting area and formed by n stages of micro-tooth structures which are sequentially distributed in a direction from a drill point to the clamping area; and the inverse taper area is located on the auxiliary cutting area. The multi-step multi-micro-blade drill bit provided by the invention has the step structures, and the micro-tooth structures are distributed on auxiliary cutting blades of all stages of step structures, so that burrs produced in the drilling process can be rebounded into the micro-tooth structures and cut off by micro teeth, so that the burrs in an inlet and an outlet can be effectively removed, and the layering and tearing damage during final hole forming is reduced; and an inverse taper structure is adopted, so that the vibration of a hole inlet side in the final forming stage of drilling is reduced, and the hole diameter accuracy and the inlet quality are improved.

Description

technical field [0001] The invention belongs to the technical field of drilling tools in mechanical processing, and relates to a multi-step multi-micro-edged drill bit for hole-making made of carbon fiber reinforced composite materials. Background technique [0002] As an advanced composite material, carbon fiber reinforced composite (CFRP) has excellent comprehensive properties such as high specific strength, high specific stiffness, fatigue resistance, corrosion resistance and excellent designability, and has been widely used in aerospace, automobile and other fields. Wide application, such as Airbus A350XWB, the extensive use of composite materials has greatly reduced the weight of the aircraft structure and improved the fuel economy of the aircraft. However, in order to realize the connection and assembly of composite parts, a series of mechanical processing is required, and hole making is one of the most arduous mechanical processing methods. Since CFRP is mainly compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/08
CPCB23B51/009B23B51/08
Inventor 王福吉白玉付饶贾振元钱宝伟王小楠
Owner DALIAN UNIV OF TECH
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