Lubricant technology is in microtherm minim the application in treatment of material of a few kinds of typical difficult treatment

Time:2023-06-20 14:53:36
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source:EASCOR CNC Machining

Microtherm minim used cutting fluid to cause the problem such as environmental pollution and harm worker health in great quantities in treatment of cutting of overview of lubricant cutting technology, and technology of dry type cutting is put in a lot of limitation again, because this pollutes the research of small, lubricant to minim of low temperature of human body hurtless technology to the environment,become one of heat that machining domain studies. Microtherm minim is lubricant cutting technology is technology of cutting of microtherm air cooling (Cooling Air, CA) technology of as lubricant as minim cutting (Minimal/Minimum Quantity Lubrication, of MQL) compositive, it already shirt-sleeve technology of cutting of microtherm air cooling and minim are lubricant the advantage of cutting technology, remedied the flaw when technology of 2 kinds of cutting applies alone again at the same time, on the cutting treatment of difficult treatment material body revealed distinct advantage. 1 minim is lubricant cutting technology this technology is to will compress the lubricant of air and thimbleful to mix vaporization hind, form in season of mist of steam of class of fine long hair, micron to cutting area, undertake lubricating to cutting tool and workpiece and cutting tool and the osculatory interface that cut bits. Reducing attrition and felt while also cooled cutting area is helpful for discharging bits, improved cutting to machine a condition significantly thereby. The advantage of lubricant technology compares minim apparent: Lubricant furnishs with bead of high speed mist, those who improved lubricant is osmotic, improved cooling and lubricant result; The lubricant dosage that MQL place uses is commonly horary a few milliliter, and pouring the use quantity of cutting fluid form is minutely a few litres; The lubricant dose that MQL technology uses is very few, and have character of green environmental protection, improved work efficiency already, won't cause pollution to the environment again; The cutting tool outside cutting area, workpiece and the cleanness that cut bits is dry, cut bits to be able to reclaim through compressing use, won't increase clean cost; MQL can set lubricant optimal chroma according to operating mode, eliminated particle of float of cutting fluid horizontally pivoted hung to pollute, improved working environment of the worker; MQL system is simple, cover an area of small, install the machine tool in all sorts of types to go up easily. Technology of cutting of air cooling of 2 low temperature this technology is will - the nozzle of air cooling classics of 100~-10 ℃ sends to cutting area, can make the temperature of cutting area is reduced greatly, cause at the same time by the cold brittleness of treatment material, it is relatively easy to make cutting process becomes undertake, improve cutting tool to wear away accordingly the cutting method of the state. Cutting of microtherm air cooling and traditional cutting photograph are compared, can improve treatment efficiency, improve workpiece surface quality, and to the environment almost free from contamination. Above processing technique of 2 kinds of green although the advantage is outstanding, but a lot of limitation also exists when be being used alone. As a result of the lubricant action of pure support lube, without corresponding refrigeration establishment, lubricant cutting technology puts drop in the following defect: Cool performance is insufficient, high to temperature of area of cutting of difficult treatment material issue is solved hard; Lubricant is put in the problem such as lube film burst, lubricant invalidation below high temperature action. High speed cutting or material add man-hour hard, cutting area temperature lifts quickly, the lubricant function of lubricant drops, bring about processability to be able to worsen. And when cutting of air cooling of use low temperature, the lubricity of cutting tool and workpiece material poorer. If combine microtherm medium and lubricant effectively, make full use of the temperature that cooling medium drops cutting area, use the lubricant character of lubricant, reduce attrition, can come true than many and pouring the cooling and lubricant effect with cutting much better fluid. Lubricant cutting technology avoided minim of this kind of low temperature to produce pollution to the environment not only, and can maintain improve treatment quality even. Group of task of research of production technology of green of Beijing aerospace college since 2005, devote oneself to microtherm minim all the time the research of lubricant cutting technology, already developed the microtherm minim that gives 2 maturity now lubricant system. Lubricant cutting technology is in microtherm minim the application in treatment of cutting of material of a few kinds of typical difficult treatment is difficult treatment material, steel of the alloy that be like titanium, high temperature alloy, stainless steel, excel in, have strength normally tall, fight oxidation ability strong, high temperature resistant wait for a characteristic. While they are satisfying high-powered use requirement, also brought a lot of difficult problem to cutting treatment. When processing difficult treatment data, cutting area temperature is very high, cutting tool life is brief, quality of spare parts surface achieves target requirement hard commonly. Traditional cutting fluid is serious to environmental pollution, and relevant research also makes clear, the use meeting of cutting fluid causes the urgent cold impact of cutting tool surface, cause the problem such as collapse blade, micro-crack, quickened cutting tool damaged. Microtherm minim reflected huge advantage on the cutting treatment of lubricant cutting technology in difficult treatment material, satisfied a spare parts to machine the requirement of quality already, rose to machine efficiency and cutting tool service life, reduced the use amount of cutting fluid considerably again. Lubricant cutting technology is in minim of 1 low temperature because the applied titanium alloy on titanium alloy cutting is had taller than intensity, be able to bear or endure corrode sex good, hear resistance is tall, without magnetism, appear the characteristic such as sound and be used extensively at each domains. The main cutting function of titanium alloy includes: Heat conduction function is low, cold good appearance produces acuteness and chemical reaction, plasticity with gas when serious, high temperature low, stretch model measures small, flexibility to be out of shape wait greatly. When material of cutting titanium alloy, phenomenon sticking a knife is apparent, cut bits curly and not easy eliminate quickly. The means of alloy of microtherm cutting titanium uses liquid nitrogen or cutting of microtherm air cooling more, nandy A.

Wait for air cooling of use low temperature to mix syncretic to decide lube agent turning to machine titanium alloy TC4, undertake contrast with the conventional treatment means inside factory workshop, discover this method reduced turning force not only, improved cutting tool life, and be in dominant position of side of bits, platoon bits is prominent. In addition, hong S.

, Paul S.

, VenugopalK.

Wait to also used microtherm means to do cutting test to titanium alloy material, got right test result. Lubricant system had the microtherm drop that this task group uses own research and development a series of titanium alloy (TC4) milling experiments, used 5 kinds of cooling and lubricant means respectively: Dry type cutting, tradition is pouring type cutting, air cooling cutting (CA) , minim is lubricant cutting (MQL) lubricate with microtherm minim cutting (MQL-CA) , studied all sorts of cooling and lubricant means wear away to cutting tool, the cutting force, influence that machines exterior quality. Pursue among them 1, the 2 milling force values that leave for different and cooling lubricant means respectively, cutting tool wears away the process follows time change curve. Test result makes clear: In the cutting parameter of make choice of, TC4 of alloy of titanium of lubricant means cutting can reduce drop of use low temperature effectively cutting force, cutting tool wears away, improve cutting tool life, improvement already machined exterior quality, and realized microtherm minim what the treatment efficiency of TC4 of alloy of lubricant cutting titanium compares a tradition is pouring type cutting raised 20%~30% . Lubricant cutting technology is in minim of Nextpage2 low temperature high temperature alloy (GH4169) the alloy of applied high temperature on cutting can divide the Jigaowen that it is iron by base metal alloy of alloy, nickel radical high temperature and alloy of cobalt radical high temperature. High temperature alloy is had admirable high temperature resistant, anti-corrosive characteristic, the key waits in plane, rocket often use in the design. This material has heat conduction to lead phenomenon of the low, felt when machining sclerotic and serious, cutting serious, cutting tool wears away acuteness wait for a characteristic. Because the applied range of GH4169 material is wide, but its machine function extreme difference, domestic and international a lot of scholars did relatively thorough research to the microtherm fabricating characteristics of this material. Kim S.

With Zhong Z.

Alloy of high temperature of cutting of use low temperature, prolonged cutting tool life while, still improved the exterior quality of workpiece. Group of task of research of production technology of green of Beijing aerospace college lubricates in minim of use low temperature a large number of research were done on GH4169 of alloy of cutting high temperature. Pursue among them 3 it is traditional below different cutting parameter pouring the milling force of GH4169 of alloy of lubricant cutting high temperature is worth cutting and microtherm minim curve; Graph 4 for 2 kinds cooling and lubricant means is in the workpiece surface surface roughness below different cutting parameter is worth contrast; Graph 5 state 2 kinds of cooling means leave case of workpiece surface hardness. Consider to make clear, below the cutting parameter of place make choice of, lubricant cutting GH4169 can reduce drop of use low temperature significantly cutting force, already machined exterior surface roughness to be worth, improve cutting tool life, and workpiece machines sclerotic phenomenon also improve somewhat. Lubricant cutting technology is in minim of 3 low temperature the application on cutting stainless steel this task group regards cutting as experiment object with respect to 1Cr18Ni9Ti stainless steel, of 1Cr18Ni9Ti stainless steel opposite but cutting sex is in about 0.

3 ～ 0.

5 between, it is material of a kind of difficult cutting, main show is in its cutting fabricating characteristics: (1) high temperature intensity and high temperature hardness are tall, when 700 ℃ its machinery function still was not reduced apparently, reason cuts bits to be cut not easily to leave, muscularity of the cutting in cutting process, cutting tool is easy wear away; (2) plasticity and tenacity are tall, shrinkage of outspread rate, section and concussion cost are higher, cut bits not easy from, curly and break off, cut the functional grow in quantity that bits is out of shape place is used up, and heat energy of major energy translate into, make cutting temperature elevatory; (3) the heat conduction rate of this material is low, medicinal powder hot difference, by the quantity of heat that cuts bits to take away little, major quantity of heat is absorbed by cutting tool, the temperature that causes cutting tool is elevatory, aggravate cutting tool wears away; (4) this material melting point is low, stick a knife easily, in cutting process easy form the tumour that accumulate bits, influence surface machines quality. Because the cutting processability of 1Cr18Ni9Ti is very poor, it is especially when interrupted cutting, easy generation of cutting tool pole wears away and felt damaged. This task group studied this kinds of stainless steel lubricates in microtherm minim the milling below the condition is characteristic. Compared different cutting parameter to leave traditional cutting and microtherm trace through the experiment the cooling and lubricant effect of lubricant cutting. The result makes clear: Below picks material and cutting parameter condition, it is apparently good to use the effect that lubricant cutting is restraining microtherm minim to cutting tool wears away and reduce cutting force respect at traditional cutting; At the same time air cooling temperature wears away to cutting tool have certain effect, fall in the case with bigger linear velocity especially, air cooling temperature is lower, restrain effect of cutting tool tatty to had been jumped over; But air cooling temperature is lesser to the influence of cutting force. Lubricant cutting technology is in minim of 4 low temperature the applied high strenth on cutting of excel in steel steel is to show the steel with intensity and tenacity respect very good union is planted, tensile strength is in commonly 1200MPa above, pledge higher strength can be gained after processing through tone, hardness is in HRC30 ～ 50 between. As the development of machinist job, taller and taller to the performance demand of machine and spare parts, the use of excel in steel is more general, the spare parts is making the treatment difficulty in the process be highlighted increasingly. High strenth steel has characteristic of the following treatment: Cutting muscularity, below same cutting condition cutting force is worth is cutting 1 of 45 steel.

17 ～ 1.

49 times; Cutting temperature is high; Cutting tool durability is low; The performance that break bits is poor. This task group lubricates with respect to microtherm minim a large number of research also were done on the application of steel of excel in of cutting technology cutting. Through the milling of excel in steel the experiment compared dry type cutting, tradition pouring cutting of air cooling of cutting, low temperature and microtherm minim are lubricant the refrigeration of cutting is lubricant the effect, studied these a few kinds of cooling and lubricant means wear away to cutting force, cutting tool, exterior surface roughness and the influence that cut bits. Test result proves: Below picks material and cutting parameter condition, 60% what use the milling force with microtherm lubricant minim to be traditional cutting only, and its are OK better inhibition place of point of a knife sticks the generation that receives thing, reduce cutting tool to wear away, improve workpiece surface quality. The observation in the experiment cuts bits not to have blue area almost to what lubricant means cutting produces drop of use low temperature, blue cuts bits cut bits to be oxidized to form below high temperature. Lubricant kind solved minim of this specification low temperature effectively the difficult problem with high temperature of area of the cutting when steel of cutting excel in. Lubricant technology can offer minim of last word low temperature as pouring as the tradition cutting comparatives better even cooling and lubricant performance, below appropriate cutting parameter, when can solving material of cutting difficult treatment effectively, cutting area temperature is high, cutting tool life is brief wait for difficult problem. It provided a kind of cleanness, efficient means to material of cutting difficult treatment. CNC Milling CNC Machining