CN108817482A

CN108817482A - A kind of knife changable CFRP drilling processing air suction type drill bit

Info

Publication number: CN108817482A
Application number: CN201811041486.8A
Authority: CN
Inventors: 王义文; 卢传迪; 许成阳; 付鹏强; 何耿黄; 李凌祥
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2018-09-07
Filing date: 2018-09-07
Publication date: 2018-11-16

Abstract

Present document relates to a kind of drill bits for CFRP drilling processing, and to reduce the generation of defect in CFRP process, which mainly includes：1- drill body, 3- air-breathing duct, 4- chisel edge, 5- main cutting edge, the main rake face of 6-, the main flank of 7- first, the main flank of 8- second, the first end cutting edge of 9-, the secondary rake face of 10- first, 11- minor first flank, the second end cutting edge of 12-, the secondary rake face of 13- second, the second minor flank of 14-, 15- screw, is cut at 16- chisel edge 2- blade.It can achieve the effect of the tearing reduced in process, burr, layering and thermal damage, and detachable blade can reduce processing cost.

Description

A kind of knife changable CFRP drilling processing air suction type drill bit

Technical field

The present invention relates to the drill bits of CFRP drilling processing, and in particular to a kind of knife changable CFRP drilling processing suction Gas formula drill bit.

Background technique

Carbon fibre composite is due to its light weight, the advantages that specific strength height and high specific modulus, is widely used in aviation boat The fields such as it.But the processing such as layering, burr, fiber tearing, hole wall scuffing are easily generated during the hole machined of CFRP and are lacked It falls into, they have seriously affected intensity and the fatigue life of carbon fibre composite connection structure.And it is produced during hole machined Raw powdered chip is very big to contamination, influences worker's health and cutter life.Present chip processing Manual type is mainly used, low efficiency is not carried out chip and is recycled automatically.It devises herein thus a kind of for CFRP brill The drill bit of processing is cut, it can be effectively reduced CFRP in drilling manufacturing deficiency, and chip recycling may be implemented.

Summary of the invention

1. devising a kind of drill bit for CFRP drilling processing to achieve the above object, the drill bit mainly includes：Drill body, Blade, main cutting edge, main rake face, the first main flank, the second main flank, the first end cutting edge, the first secondary rake face, the One minor flank, the second end cutting edge, the second secondary rake face, the second minor flank；

2. material described in can be diamond, be also possible to the material of other suitable processing carbon fibre composites；

3. blade described in can be connected on the drill body of straight trough with screw；

5. anterior angle corresponding to the main rake face of blade described in is positive rake angle, to improve processing quality；

When 6. the main flank of blade first described in and the second main flank design and horizontal direction there is certain angles；

There are air-breathing duct inside cutter hub described in 7., chip is discharged inside duct；

8. cutter hub described in can achieve the effect that reduce burr when air-breathing with adsorbing fiber；

9. drill bit described in can reduce the temperature of machined material when air-breathing, reduce thermal damage；

10. the air-breathing duct at blade rake face described in enhances inspiratory effects close to main cutting edge；

11. blade described in simultaneously participates in the secondary cutting of main cutting and part；

12. the main flank of drill bit first described in is protruded slightly with respect to the second main flank, reduces flank and machined material And the contact area of part chips, to achieve the effect that reduce friction；

13. the angle between blade chisel edge described in reduces axial force, reduces the tearing of machined material less than 180 °.

Beneficial effects of the present invention

A kind of drill bit for CFRP drilling processing is devised for the present invention, it has following good effect：Increase anterior angle, energy Enough effective generations for inhibiting CFRP defect in process engineering, and improve the quality in processed hole；In the mistake of drilling processing Can be in internal chip evacuation, effectively recycling chip in journey, and fiber can be made to erect when air-breathing, reduce burr；Blade It can replace, reduce processing cost；Interior air-breathing chip removal can reduce temperature when drilling, improve processing quality.

Detailed description of the invention

Fig. 1 is CFRP drill bit for machining surface structure；

Fig. 2 is CFRP drill bit for machining pipeline configuration；

Fig. 3 is the blade structure of CFRP drill bit for machining.

Specific embodiment

A kind of welded type blade for CFRP drilling processing is devised, herein to reduce defect in CFRP process It generates, which mainly includes：1- drill body, 2- blade, 3- air-breathing duct, 4- chisel edge, 5- main cutting edge, the main rake face of 6-, 7- The secondary rake face of first main flank, the main flank of 8- second, the first end cutting edge of 9-, 10- first, 11- minor first flank, The second end cutting edge of 12-, 13- second secondary rake face, 15- screw, are cut at 16- chisel edge the second minor flank of 14-.

2- blade is replaceable, is connected on 1- drill body by 15- screw；The anterior angle of the main rake face of 6- is positive, and can be improved Processing quality；The duct 3- connects the negative pressure generating device outside drill body, and chip mainly generates at 6- rake face, when negative pressure generates When, chip leads to outside by the 3- air-breathing duct near 2- drill body, is absorbed by chip suction device.

Claims

1. the drill bit of CFRP drilling processing described in mainly includes：1- drill body, 2- blade, 3- air-breathing duct, 4- chisel edge, 5- master Knife before the main rake face of cutting edge, 6-, the main flank of 7- first, the main flank of 8- second, the first end cutting edge of 9-, the first pair of 10- Face, 11- minor first flank, the second end cutting edge of 12-, the secondary rake face of 13- second, the second minor flank of 14-, 15- screw, It is cut at 16- chisel edge.

2. according to drill bit 2- blade described in claim 1, main body is L-type, 118 ° of sharp angle, 160 ° of 4- chisel edge angle；6- rake face By cutting, so that anterior angle is positive can be improved processing quality；When 1 drill body is placed vertically, the main flank of 7- first and water Square to there is certain angle, and the opposite main flank of 8- second is protruded slightly, reduce drill body and machined material and chip it Between frictional force；2- blade is connected on straight trough cutter hub by 15- screw；By being cut at 16- chisel edge at its 5- chisel edge, shorten 5- chisel edge, and two chisel edges is made to have certain angle, improve processing quality.

3. can be diamond according to the material of drill bit 2- blade described in claim 1, it is also possible to other suitable processing carbon The material of fibrous composite.

4. according to the duct drill bit 3- described in claim 1, be in the main rake face entrance of 6- it is curved, at two rake faces Duct is converged inside 1- drill body, and 1- drill body is led in the form of straight channel；Its entrance is in the main rake face of 6-, close to 4- main cutting Sword, to reach good inspiratory effects.