High quality of carbon fiber composite material of aperture auger cut

5mm, monolayer ply is O about.

125mm. Choose in the experiment auger cut rate for 10, 000 ～ 30, 000r/min, use diamond, hard alloy and high-speed steel the broach with 3 kinds of qualitative material, broach diameter all is 6mm. Exit is torn off is the blemish with the most intuitionistic bore, tear off what value L regards aperture exterior as quality in order to export to measure parameter so. Statified it is in carbon fiber composite material gets a kind of leading defect that in cutting treatment, appears at plank interior, statified the on any account that the size of blemish can represent aperture interior quality. Permeate fluid to detect with chloridize gold the law detects auger those who cut hole is statified circumstance, each ask storied size is used statified dimension L will measure. In the 2nd kind of blemish that the 2 crucial factors that score high quality hole mention in front, statified, tear off, break off crack because get,etc basically is cut force too big and cause cutting stress to exceed limit of strength of data of itself of carbon fiber composite material to cause, cottony and main sufficient because the cutting blade of broach is sharp,sexual difference causes. Sharp sex difference is in cutting blade cause broach cutting while function drops, also can bring about get those who cut force to increase, so the sharp sex difference of cutting blade also is to cause statified, tear off, break off one of main reasons that crack blemish. Because this raises the sharp sex of cutting blade,become get the problem that cuts high quality aperture to want to solve above all. The sharp sex of cutting blade is apparent to the influence of bore quality. The experiment curve of the bore number of the qualitative bit of two kinds of material that Xin Ren has worried and bore quality relationship. Visible, it is consistent that the addition that two kinds of broach count along with bore is behaved, be in initiative it is better to get the aperture quality that cuts level treatment, bore number is achieved a certain quantity of hind, the sharp sex of broach cutting blade drops, auger cut force to increase, the be ashamed of simple quantitative change of aperture. Because hard alloy is taller than the hardness of high-speed steel, the sharp sex of blade of cutting of hard alloy broach is retentive time is longer, a number that the actor quality that so hard alloy broach gets strings is much also, below the premise that has good and sharp sex in broach cutting blade, get high cutting rate is another key that scores high quality hole. High speed getting cuts have profit of the following respects: (F of · of Vf=n of 1) feed speed is in carry manufacturing efficiency (namely feed speed) below changeless premise, main shaft (broach) rotate speed N is taller, feed F is smaller, auger cut force lower also; (The rotate speed with high 2) can make broach maintains small cutting ply when cutting, because this is getting any rudimental fiber in cutting a course and colophony to be able to be excised in time, because its are accumulated,do not send stay overmuch and cause in some hour auger cut force to be caused greatly too tear off, cottony wait for blemish; (3) high speed is gotten cut can gain face of high grade hole wall microcosmic quality, in 24, run the drilling tool into the well of 000r/min high speed is cut those who go out is much to CFRP aperture, surface of its hole wall each place all level off is smooth, even if in bend cut area of cut type cutting inside, hole wall surface also battle has the undesirable phenomenon generation such as indentation. The hard alloy bit that Xin Ren has worried is in 30, run the drilling tool into the well of 000r/min high speed cuts carbon fiber composite material the export picture of board aperture, can see, the exit surface of aperture was not torn off, cottony wait for blemish, the form of aperture is very regular, quality is good. The place on put together is narrated, make sure the crucial ridge native that wins high quality aperture has two: One is the good and sharp sex that holds broach cutting blade; Another is to use get high cut rate. Both a relation that is mutual depend on sb or sth for existence, former the premise that is latter, latter is the safeguard that wins tall productivity and action of former and sufficient play. 3 diamond bit are gotten cut technical diamond to have hardness caustic of tall, wear-resisting, coefficient of friction small, thermal conductivity is good wait for an advantage, diamond bit is being gotten larger dominant position is had than hard alloy and high-speed steel when cutting carbon fiber composite material, accordingly, use it to get the sense with cut carbon fiber composite material to have important. This task considered to use diamond bit of thick film CVD to get those who cut carbon fiber composite material cut a technology. 3.

The diamond of the CVD that make of diamond bit of CVD of 1 thick film is to use deposit of chemical gas phase (a kind of complete crystalloid that the methodological preparation of CVD) comes out tastes pure diamond stuff more, it can show velar shape to adhere to at base surface, the pure diamond that also can break away from base in order to be is thick piece. The article call latter diamond of thick film CVD, its physical function and natural diamond are very adjacent, chemistry is identical. This task was used respectively on the join craft of bit and cutter hub felt and solder two kinds of methods, the design is made went out to suit to get the diamond bit of CVD of two kinds of thick film that cuts CFRP. The diamond bit of thick film CVD of felt uses O.

The CVD diamond diaphragm with thick 7mm serves as bit, binder uses gum of commonly used inorganic of copper of phosphoric acid oxidation, armour (oxidation copper is pulverous) , second (phosphoric acid solution) two constituent deserve to compare for 1:(3.

5 ～ 5.

0) ; Material of soldering cutter hub of CVD diamond bit is A3 steel, bit ply 0.

85mm; Knife chamfer width 1.

45mm, unilateral clearance 0.

3mm is used at placing a shape solder, use connection of law of solder of vacuum drill rod, solder temperature is 900 ℃ . Produce the picture of the diamond bit of CVD of felt thick film that give, broach diameter is 6mm. 3.

Diamond bit of CVD of 2 thick film gets the quality hole that cuts hole to enter, diamond bit of CVD of exit quality thick film gets those who cut CFRP hole to enter, export picture. Can see, the appearance of the entrance of aperture and exit is special regulation, neat, did not tear off completely, break off crack, cottony wait for blemish. Of aperture into, apparent excel uses exit surface quality below same condition high-speed steel broach and hard alloy broach get the exterior quality that cuts hole. Hole wall is statified the situation is same auger cut the diamond bit below the condition and hard alloy broach to get the layer that cuts hole statified dimension contrast circumstance. Can see, former and apparent be less than latter, diamond bit is gotten cut aperture to go out in aperture only, the 1/2 of the entrance is layer upon layer an existence is statified, in deeper other each all are not had between the layer statified appear; And hard alloy broach is gotten cut Kong Zaikong to go out, the entrance exists between a few layers statified. From statified angle is told, diamond bit gets the quality that cuts hole broach of gold of stage of apparent excel horniness gets the quality that cuts hole. Get from diamond bit cut layer of aperture of carbon fiber composite material statified the photograph can see, entrance side 1/2 is layer upon layer ask statified appearance and hard alloy broach get the layer that cuts hole statified figure is basic and same, it is a circle approximately; Export side 1/2 is layer upon layer there is discontinuous very small size around 7L edge statified. No matter be entrance side or export side, 2/3 is layer upon layer ask its all are not had between the layer each below statified. By in front test result can discover, the quality of the hole that diamond bit cuts the treatment below the circumstance to go out in high speed getting is first-rate. With composite material of concerned carbon fiber the standard that make hole contrasts, its quality already exceeded the requirement of this standard apparently. Appear this kind of result, basically have reason of the following respects. The sharp sex of blade of cutting of diamond bit of thick film CVD is good. General Xin Ren grinds good diamond cutting tool, =0 of β of R of radius of point of its cutting blade.

1 ～ O.

5µm, it can accomplish fiber of will odd root (the diameter divides second excision for 7 ～ 8µm) . The cutting blade with sharp diamond bit makes getting the cutting sex that cuts the state of affairs with very little feed to fall to also can keep good, at the same time sharp cutting blade makes get cut force to become very small, in getting the whole process that cuts hole, what the shop cuts force to all be less than blemish to arise is critical auger cut force: The coefficient of friction of diamond razor blade is small. Diamond is belonged to with all sorts of meetings, the 1/50 ～ 1/800 that the wear extent that metalloid material chafes is hard alloy only, extremely low coefficient of friction can reduce cutting force and deflection, obtain good appearance to machine quality thereby. Diamond penetrate hardness is tall, wearability is good, diamond bit is being gotten in cutting CFRP course, when can growing, ask hold oneself cutting blade sharp sex is changeless, broach durability is very tall, bore is qualitative most stability is first-rate. Diamond penetrate hardness is tall, wearability is good, diamond bit is being gotten cutting high speed getting is the safeguard that scores high quality hole. The high speed that this task uses is gotten cut can rise in treatment efficiency or feed is reduced effectively below changeless premise, spurt Dai amount is smaller, auger cut force smaller, should get cut force small to can't arise statified, tear off, break off crack when waiting for all sorts of blemish, can acquire high quality auger cut hole. 4 last words assure to obtain auger cut high quality of carbon fiber composite material the crucial factor of aperture has two: One is the good and sharp sex that carries broach cutting state; Another is to use get high cut rate. High speed getting cuts an experiment to reach statified check checks check to make clear, diamond bit of thick film CVD gets the aperture quality that cuts CFRP first-rate, it is gotten in carbon fiber composite material tremendous applied latent capacity is had in cutting treatment. CNC Milling CNC Machining