One kind takes the processing technique of environmental protection seriously

1mm/r hole depth: 15mm pursues number of 6 treatment opening and hind relation of knife face tatty pursues the high speed of half dry type of 7 crankshaft oily aperture machines (EMG company) pursue industry of 8 Fuji energy and Fuji BC ability grind the MQL that the company cooperates to develop bores hole cutting tool (main user object is automobile industry) workpiece: A2017 cutting speed: 100m/min feed: 0.

1mm/r hole depth: 15mm(L/D=3) machines Kong Shu: 200 graphs 9 aluminous material do what type machines to already machined exterior surface roughness to if pursue,do the processing technique that processing technique involves type partly partly show 1 times. The MQL device that uses main shaft to offer oily opening and cutting fluid photograph are compared, the carry momentum that mist current moves is lesser, accordingly, cutting tool or workpiece are when high speed circumgyrate, the air flow that produces around will affect the flow direction of cooling mist fluid, make its cannot reach cutting place adequately. In the treatment of the high speed cutting that this kind of phenomenon exceeds 10000r/min in main shaft rotate speed, aperture, treatment such as grooving particularly apparent. Solve the method with this the most active issue, it is the interior that lets cooling mist fluid pass circumgyrate main shaft, the repass broach, aperture offerring oil that establishs the circumgyrate tool such as milling cutter, send cutting place directly. This kind supplies the means of cooling mist fluid by the aperture inside main shaft, in former some wet ever also had used in treatment, but what furnished in the past is a liquid, and what supply now is mist shape current however, appeared then undermentioned problem. The graph shows rotate speed of the main shaft when giving mist fluid to use the high speed main shaft of means of feed flow of original main shaft to send for oily aperture and mist fluid 2 times the relation of ejective quantity. By the graph knowable, when main shaft rotate speed exceeds 10000r/min, the mist fluid volume with pointed ejective ministry of cutting tool blade drops quickly. The reason depends on, when circumgyrate of main shaft high speed, suffer the effect of centrifugal force, droplet adheres to on the circumgyrate passageway wall inside main shaft; When 30000r/min of main shaft turn up when such high speed circumgyrate, mist fluid comes out from the depart in spray completely almost, what from cutting tool oil Kong Zhongpen goes out is almost pure for air. To solve this problem, researcher adopted following measure: (1) lets compress air and cutting fluid to send from diverse line, pass main shaft, let both mix near the knife handle that carries a department in main shaft, form mist fluid; (2) is not instead of passageway of fluid of the mist inside main shaft circumgyrate structure, jie leaves the action of mental efforts with restraining. After the blame that deserves to have special structure inside main shaft answers crossover, even if falls in condition of high speed circumgyrate, the mist fluid that also can gain extraordinary stability is ejective quantity. The supply unit of action of imitate mist fluid uses main shaft of high speed circumgyrate to transport the supply property of mist fluid, of the element such as the appearance of course of the circumgyrate inside aperture of diameter of bead of fluid getting fog, density, main shaft, dimension restrict. To be in dope of design phase ration each afore-mentioned parameter, researcher is used normally analytic software comes to the fluid the action of imitate mist fluid. Graph 4 it is namely use this software (Star-CD) is analytic one of action example that pass circumgyrate line. When main shaft not when circumgyrate, mist fluid flows to front directly from main shaft back end; When circumgyrate of main shaft high speed, can arise inside circumgyrate course rotate the gender flows, droplet suffers centrifugal force to affect, sidewall of course of bring into contact with, this will reduce the droplet amount that sends main shaft front, reduce cooling and lubricant effect thereby. Graph 5 to differ through computer simulative average attainable distance undertakes diametical droplet compare a result. Droplet diameter is smaller, suffer the effect of centrifugal force more not easily, droplet comes back as the circumgyrate of circumgyrate course stream, reach the blade pointed place of cutting tool more easily also. But, if droplet diameter is too small, after it carries a ministry to pour out of from cutting tool, needle of adherent Yu Ren or the performance that workpiece machines a face are poorer also, these imperceptible droplet easily pelagian in circumjacent environment, pollute an environment already, abate cooling effect. Considering all sorts of elements, recommend droplet diameter M of about 2 μ is most applicable. This one value and the standard standard general interest that the mist liquid that uses at present produces device are consistent. The requirement of unit of mist juice supply in performance side is: Generation has the mist liquid of optimal droplet diameter, use necessary air pressure and proper flow, can carry mist fluid steadily treatment position. The effect of new-style MQL means lubricates and good mist fluid passes cooling effect the aperture inside main shaft, flow to treatment place directly for oily aperture by cutting tool again, this kind of structure and combination of treatment of half dry type rise, can obtain lubricate goodly and cooling effect, and this is to was used in the past wet treatment cannot achieve. The graph shows is what machine aperture with broach example 6 times, the experiment is used dry type, half dry type, wet treatment of 3 kinds of means, listed width wears away to compare at the back of all sorts of cutting tool that machine methodological generation in the graph. The result makes clear, use the MQL treatment of feed flow of the aperture inside main shaft, can restrain cutting tool effectively to wear away, its result and wet treatment is general and same, and effect of its environmental protection criterion far excel is wet treatment. The high speed treatment that can realize small diameter deep aperture is the closest, fuji BC ability grinds company development gives series of EBT of device of fluid of a kind of new-style mist, this is appropriative of treatment of deep aperture of a kind of small diameter the exterior interior that mix air sends fluid unit (outside machine modulation becomes mist liquid, pass the aperture inside main shaft, offer oily opening by cutting tool again ejective) . The mist fluid of EBT series is ejective the volume rises 3 times above than the congener product that this company developed 2000. Additional, in tool manufacturer cooperate to fall, they go up in the broach with identical diameter, increase the aperture that offer oil, make ejective mist fluid increases substantially, according to saying mist fluid is ejective the quantity can increase 7 times at most. All sorts of parameter of this kind of device and cutting tool close suitably undertake cutting experiments, the result makes clear, cutting tool life raises 2 times above; Use its at vertical treatment has a test, need not add pressurization device to be able to undertake small diameter deep aperture is machined. The graph shows the high speed of half dry type that is crankshaft oily aperture 7 times to machine example. The cutting treatment Inconel that can be used at difficult treatment material is the difficult treatment material of a kind of model, alveolus is machined on workpiece of alloy of this kind of heat-resisting especially difficult. Used mostly in the past wet treatment, efficiency is low, pollution is heavy; Use treatment of half dry type now, efficiency twice grows, pollution is very slight also. If use 6mm broach to machine alveolus in Inconel workpiece, use water-solubility cooling fluid to undertake wet treatment (V=7 ～ 10m/min, f=0.

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05mm/r) , treatment length can amount to 30m to control at most, and use MQL means to machine (V=15 ～ 20m/min, f=0.

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10mm/r) , cutting length can amount to 186m, it is about 6 times of treatment wetter. This shows, MQL means is machined with the cutting at difficult treatment material is well worth doing. The measure of aluminium alloy spare parts that automobile industry adopts industry of automobile of MQL processing technique in great quantities is very much, used in the past wet treatment, pollution is very serious, treatment efficiency is not ideal also. Now, a lot of manufacturer are considering to use MQL technology to undertake machining in great quantities, if the horse amounts to the product line of air cylinder body of company car oneself, begin to use dry type and means of treatment of half dry type in the round two years ago, current, outside eliminating individual process, already all used MQL processing technique. Feng Tian Motor Corporation is machined with all sorts of aperture in gear cutting in, already used dry type or MQL means treatment partly. Graph 8 it is Fuji essence labour and Fuji BC ability grind the MQL that the company cooperates to develop bores hole cutting tool. The effect of cutting tool coating is of all kinds and wet treatment all must leave supply in high pressure many cutting fluid, and treatment of half dry type needs thimbleful cutting only fluid and compress air, the other element related consideration and treatment process still answers in the meantime, the apparent effect with appearance of such as cutting tool, qualitative material. The graph is shown 9 times go up in aluminous material for hard alloy broach and DLC coating broach the result that machines aperture, in light of the exterior surface roughness that already machined aperture, the effect of DLC coating broach is close friends more. In the treatment of half dry type of aluminous material, the conglutinate appearance that DLC coating can control workpiece material effectively to go up in blade of cutting tool cutting, accordingly, DLC coating can serve as the significant step that prevents to produce conglutinate phenomenon. In addition, CVD coating, PVD coating, titanium changes content coating to wait, in dry type and treatment of half dry type, as the necessary technology that prolongs tool life, also have quite important place. Appearance of blade of cutting tool cutting and helix chamfer appearance regard the MQL of medium as treatment with air, as wet as what use high-pressured refrigeration treatment is compared, former the performance that discharges bits outside from treatment place is poorer, undertake in broach deep aperture adds man-hour especially, if what generate the appearance that cut bits is paid no attention to want or cut bits cannot from already machined eduction of Kong Neishun benefit, will make inside short time cutting tool produces damaged. Accordingly, must take the element such as cutting blade appearance, helix chamfer appearance and attrition force seriously, they are the fundamental condition that assures to discharge bits smoothly. Appearance of the aperture that offer oil and the position that gush exports use the bit that takes the aperture that offer oil, when establishing the cutting tool such as milling cutter, tap to undertake high speed is machined doing type partly, the dimension of the aperture that offer oil and position can have immediate effect to processability. Setting of general the Kong Jun that offer oil is near ministry of cutting tool end, because do type to machine the characteristic of configuration partly, mist fluid often cannot send adequately to treatment place. For example, when machining via with tap, if mist fluid carries a department from tap ejective, criterion mist fluid can flow from via exit, cooling and lubricant effect is poorer; If mist fluid from cutting tool flank ejective, cooling and lubricant effect will be more distinct. Additional, still can place a place to design suitable space in the bedspring of tool system, reach mist fluid eject from the place cutting tool is whole flank, cooling and lubricant effect will be more ideal. Anyhow, in doing type to machine partly, tool manufacturer should intensify giving out the cutting tool goods that contains appearance of appropriate the aperture that offer oil and gush export position, so that fill minute of play,do the favorable result that type machines partly. Mist fluid reclaims because device MQL treatment can develop the system that institute of unit of mist fluid jet makes optimal effect, because this can be obtained with wet the treatment function with equal treatment. Although it can use mist fluid to replace much cutting juice, but in process of treatment of this kind of half dry type, returning existence to still treat one of problem problems that solve is mist fluid is float will pollute factory environment. Although do type to machine place to use cutting liquid partly,be in order to be opposite the mixture liquid that the vegetable oil with human body minor influence is a foundation, and use quantity is very few also, but handlers is long-term and inspiratory be not good plan definitely. Additional, float mist fluid conglutinate is on the machine tool, cause easily icy or the harm such as dump. From the point of machine tool respect, the high density that should take a cover seriously to build particularly in design phase seals function, should fluid of obligate installation mist reclaims the position of device. Connecting general reason condition to fall, lead to raise mist fluid to reclaim, should rise reclaim the exact extent of device filter and increase uptake. Additional, when developing this kind of product, because plant is large,should avoid what change and bring electric power to use up increase. Current, pressing hope development gives broad user the half dry type with high-powered, efficient, compact structure machines special mist fluid to reclaim device. Cut bits to reclaim one of main tasks that device does type to machine partly, it is to improve the performance that discharge bits. Fly medicinal powder within workpiece or machine tool cut bits, as mist fluid splash shoot, extremely easy conglutinate is on the both hands of handlers, should keep clear of these tiny dirt bit are not an easy thing. Accordingly, when using half dry type to machine craft, to discharge bits smooth, must increase the working procedure of cooling fluid of an eject high pressure sometimes. Although already was developed at present,install around treatment position inspiratory the unit that cuts bits, but change as what process form, the effect of this device is not ideal. Accordingly, will answer to develop the machine tool structure that discharges bits easily and clamping apparatus energetically henceforth, the design gives what can get used to all sorts of treatment conditions to cut bits to return debit form, development goes fluid of low toughness cutting to wait. CNC Milling