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Welded type blade used for CFRP drilling machining

A welding type, blade technology, applied in metal processing equipment, boring machine/drilling machine parts, drill repairing, etc., can solve the problems of hole wall scratches, burrs, fiber tearing, etc., to improve quality, suppress the occurrence of defects, The effect of increasing the number

Inactive Publication Date: 2016-09-07
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the hole processing of CFRP, processing defects such as delamination, burr, fiber tearing, and hole wall scratches are easily generated, which seriously affect the strength and fatigue life of the carbon fiber composite connection structure.

Method used

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  • Welded type blade used for CFRP drilling machining
  • Welded type blade used for CFRP drilling machining
  • Welded type blade used for CFRP drilling machining

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Embodiment Construction

[0014] specific implementation plan

[0015] In this paper, a welded insert for CFRP drilling is designed to reduce defects during CFRP machining. The insert mainly includes: 1-insert body, 2-main cutting edge, 3-main rake face, 4 -First main flank, 5-Second main flank, 6-First auxiliary cutting edge, 7-Auxiliary rake face, 8-Second auxiliary cutting edge, 9-First auxiliary flank, 10 -Second flank.

[0016] The specific effect of each part of the blade designed in this paper, among which the design of 2-main cutting edge, 6-first minor cutting edge, and 8-second minor cutting edge is mainly to reduce the tool’s hole processing. When the axial force and reduce the generation of burrs, the front angle of the 2-main cutting edge is greater than the front angle of the 6-first auxiliary cutting edge. (2-The main cutting edge mainly plays the role of cutting, and its front angle is greater than 118°, 6-The first secondary cutting edge can play the role of cutting when machining th...

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Abstract

Due to the fact that a carbon fiber reinforced polymer composite (CFRP) has the beneficial effects of being high in specific strength, high in specific modulus, light, durable and the like, the carbon fiber reinforced polymer composite (CFRP) becomes an ideal use material in the field of aerospace. Machining defects such as layering, burrs, fiber tearing and hole wall scratching are quite likely to be generated in the CFRP hole making process and seriously influence the strength and the fatigue life of CFRP connection structures. Layering is mainly caused by the fact that the axial force of holes is larger than the interlayer bonding force of CFRP plates during hole machining. The burrs and tearing are mainly caused by obtuse cutting edges of blades. The hole scratching is mainly caused by the interaction between rear cutter faces of tools, cuttings and hole walls. Thus, a welded type blade used for CFRP drilling machining is designed and used for reducing the defects in the CFRP machining process. The blade mainly comprises a blade body 1, a main cutting edge 2, a main front cutter face 3, a first main rear cutter face 4, a second main rear cutter face 5, a first auxiliary cutting edge 6, an auxiliary front cutter face 7, a second auxiliary cutting edge 8, a first auxiliary rear cutter face 9 and a second auxiliary rear cutter face 10.

Description

technical field [0001] The invention relates to a blade specially designed for a drill bit used in carbon fiber composite material hole making, and in particular relates to a welded blade used for CFRP drilling. Background technique [0002] Carbon fiber composites are widely used in aerospace and other fields due to their light weight, high specific strength and high specific modulus. However, processing defects such as delamination, burrs, fiber tearing, and hole wall scratches are easily produced during the hole processing of CFRP, which seriously affect the strength and fatigue life of the carbon fiber composite connection structure. For this reason, this paper designs a welded insert for CFRP drilling, which can effectively reduce the generation of defects in carbon fiber composite materials during hole making. Contents of the invention [0003] In order to achieve the above purpose, a welded insert for CFRP drilling is designed. The insert mainly includes: insert bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/00
CPCB23B51/00B23B2251/04B23B2251/14
Inventor 王义文许成阳刘献礼许家忠
Owner HARBIN UNIV OF SCI & TECH
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