Lubricant cutting technology analyses minim

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2L/h (traditional and wet the dosage of cutting is 20 ～ 100L/min) , can reduce effectively cutting tool and workpiece, cutting tool and cut the attrition between bits, prevent felt, prolong cutting tool life, improve treatment surface quality. The applied advantage of MQL is clear, suitable scope is broad, included domestic and internationally about the research of MQL almost all cutting craft, if get,cut, milling, turning and grinding. Normal >MQL technology is shirt-sleeve dry type cutting and tradition are wet the advantage with both cutting: On one hand, MQL lowers the dosage of cutting fluid the rate of infinitesimal, reduce the use cost of cutting fluid significantly not only, and synthesize ester high through using natural degradation sex kind as lubricant, utmost ground reduced the cutting fluid harm to environment and human body; On the other hand, compare with photograph of dry type cutting, because MQL introduced cooling and lubricant medium, make the refrigeration of cutting process lubricant the condition is improved greatly, cutting tool, workpiece and cut bits between wear away to be reduced significantly, conduce to those who reduce temperature of cutting force, cutting and cutting tool wearing away. Technology of this kind of cutting also calls cutting of half dry type, there is very big perspective below the influence that gives priority to a problem with green environmental protection in 21 centuries. Normal TEXT-INDENT of system of 0">MQL oily mist: 21pt; Mso-char-indent-count: 2.

The construction of system of 0">MQL basically furnishs by oily mist 3 parts make system, nozzle and lubricating oil. Normal >normal TEXT-INDENT of feed flow system of 0">MQL: 21pt; Mso-char-indent-count: 2.

System of 0">MQL feed flow basically has 2 kinds of forms: One kind is outside system of buy type feed flow; One kind is inside buy type. Inside system of buy type feed flow is compositive in machine tool interior, lube and the duct line that reduce airy mixture to pass the buy inside the aperture inside machine tool main shaft and cutting tool guide treatment area, cooling lube mist supply is more easy. But this means raised new requirement to main shaft structure, often restricted the highest revolution of main shaft. System of buy type feed flow is alone design outside, the structure that oily mist furnishs is simple, need to transform a machine tool scarcely. Lube and compress air to be in the machine tool is exterior after mixing through mixing device but by many nozzle derivative, action is mixed at the cutting tool of treatment area workpiece. But change when the workpiece diameter of treatment bigger or when changing a knife, what the position of former spray head must be moved through the hand or adopt other auxiliary location systems is corrective, will realize the correct fixed position of nozzle axial, radial and angle. In supply of exterior type oily mist, to specific treatment method (if get,cut) the difficulty that returns existence craft to go up. Use at present technology, lube mist can realize long way to compare about 2 ～ only at most in treatment area of 3 lubricant. The milling of deep aperture component also is put in similar problem. Normal > transmission to minim cutting fluid pulverization, also have 2 kinds of forms: One kind is only channel, this kind of form needs a separate pulverization unit, mix the droplet with good pulverization next compress airy mixture, transmit nozzle through a passageway; Another kind is double passageway, do not need separate pulverization unit, carry two channels, small passageway is minim cutting fluid inside, exterior big channel is compress air, standing by nozzle to be in (pulverization area) or use nozzle to undertake pulverization, then eject arrives cutting area. Compare with photograph of double passageway system, only channel system more facilitate make, but when carrying lube mist, rotate in what have intense centrifugation to fall especially when main shaft is medium, oily mist can be dispersed, this often brings about treatment area oil mist is inhomogenous, make treatment pledges quantitative change is differred. Normal >normal TEXT-INDENT of 0">MQL: 21pt; Mso-char-indent-count: 2.

0"> is mixed to the environment to be reduced as far as possible the influence of human body, the lubricating oil that uses in MQL, cannot use those to contain the traditional cutting juice of a large number of poisonous additive composition again, as MQL cutting treatment uses cutting liquid, the base oil of its green lubricant has synthesis oil of cutting of sex of ester, plant, get together α - alkene (PAO) and get together glycol. And often use the synthetic ester with biology degradation tall sex and oil. Although vegetable oil also has very good biology degradation sex, but its fall in high cutting temperature, mix in workpiece, cutting tool on the tendency that colophony is changed, cutting performance is not good also, do not use basically accordingly. Normal > in addition, the size of oily drop grain in lube mist and the lubricant result that collect surface of degree of pair of treatment area cutting tool and workpiece contact are influential. The influencing factor of oily drop size includes to compress dosage of airy pressure, lube and nozzle distance commonly. Below coequal atmospheric pressure, as lube dosage and the addition that nozzle is apart from, oily drop greatens, speed is reduced. When lube dosage is equal, as baric accretion, droplet decrescent, rate increases. Accordingly, the oily drop rate with older grain is low, because oneself is gravitational more incidental in transmit deviate, bring about treatment area to cannot offer oil adequately, affect lubricant result. Normal > commonly it is under 2 μ M. Of oily drop grain collect degree of dosage that basically relies on lube and character, reduce airy dosage, and the structure of nozzle. Normal >normal TEXT-INDENT of 0">MQL: 21pt; Mso-char-indent-count: 2.

0"> issues the applied dominant position of brandish MQL to fill, the application that seeks economy, zoology and range of treatment function tripartite is optimal equilibrium point, must consider to affect all sorts of factors of MQL application function in the round. Machining complex of MQL cutting treatment gets the interact of a large number of influencing factor, craft model is unusually complex. Material of different technology, different cutting tool, different workpiece and different MQL machining complex are installed (include oily mist dosage of property of distance of direction of supply of supply and mixture means, oily mist, nozzle, lube, lube, compress air pressure) place is shown. Normal > this shows, MQL machining complex is the biggest to the influence of cutting treatment function, it is treatment condition next, wait like system of workpiece material, cutting tool and cutting parameter. Normal >normal >MQL machines function Normal > studies the result already confirmed in great quantities, be opposite in the cutting treatment application of the material such as alloy of titanium alloy, hard steel of temper by dipping in water, high temperature and stainless steel, with use dry formula cutting and wet cutting photograph is compared, MQL showed good cutting performance, correct and reasonable use MQL can raise cutting tool durability effectively, improve workpiece to already machined exterior quality. Normal > is as a result of groovy MQL technology when material of difficult treatment of high speed cutting, cutting area temperature can make the lubricating film of cutting tool surface loses lubricant effect high too, use drop in temperature effectively the result that the method can improve MQL further. If can be reduced considerably,have compress airy temperature, can increase the strength of cutting area heat exchange on one hand, improve heat exchange result; On the other hand, the rises to be able to make lubricant droplet is formed in cutting tool surface again lubricating film of heat exchange effect retains lubricant ability further, raise the durability of cutting tool thereby. If use MQL and nitrogen band, MQL can behave better cutting performance, this basically is the action lying between oxygen as a result of nitrogen. Normal > high speed is machined from go up at all the malpractice that solved cutting fluid to bring, be helpful for the protection of the worker's health and environment not only, and can reduce finished cost, it is a kind of green treatment technology that has development outlook very much undoubtedly. But the limitation with apply a domain to get certain. Minim is lubricant the technology is a kind of effective green makes a technology, in lubricant, have outstanding advantage except the respect such as bits, the new-style refrigeration that microtherm MQL technology regards a kind of convenient application as machining spot is lubricant technology, the high speed that waits for difficult treatment material in titanium alloy, high temperature alloy and tall hardness material has superior performance in treatment, rate and treatment quality can be machined in what difficult treatment data improves further on the foundation of tooling at present. CNC Milling