Use CO2 refrigeration to reduce manufacturing cost

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  • source:FINKEL CNC Machining
To vapour and gas turbine character, blade is made is one of main production cost. Use the high temperature alloy that machines hard and data, increased to machine process cost undoubtedly. Accordingly, people is pressing the treatment solution that needs innovation. Waerte or the idea of refrigeration of CO2 low temperature that put forward to suit a quantity to produce first. Taking blade to machine itself is a science. In the past, what blade manufactory is faced with is equipment issue; Current, basically be faced with what blade material brings to treatment to headache problem. To optimize efficiency further, turbine stylist is being sought improve the optimal solution that inputs higher temperature. Because need to use special material ability to satisfy high temperature to ask, meet those who increase blade make cost so. Traditional ferrite, martensite and austenite turbine steel products fit high temperature requirement no longer, those who replace is alloy of nickel radical high temperature. But, this kind of material needs longer handling time. Say from this meaning, the mainest factor is to use the innovation that matchs each other cutting tool and treatment concept to control production cost, for example the high-powered refrigeration of visibility actual effect machines a concept. The history that total position is energy industry to develop cutting tool and treatment plan only at Tubingen's Waerte is very long. "Come a few years, energy production already made one of our dedicated main trades. " Andreas Elenz of manager of business development department emphasizes Waerte, "We are all crucial parts is all-around service provider, include blade of course. This is meant from what make sure purify of the biggest metal is led but the rough machining milling cutter of dislocation razor blade arrives the integral hard alloy that assures the smallest radius blend establishs milling cutter, should provide all cutting tool (to blade treatment domain character, this amount is quite large) . Refrigeration of cooling concept cutting tool is particularly important, it is opposite not only the impact of cutting tool itself is very big, the high temperature of the generation in treatment still matters to turbine to machine whether to arise in the process increase hard alloy matrix to press stress and the play that limit its function. As different as rolled steel, when treatment cuts material hard, won't take away quantity of heat through cutting bits commonly, among them infiltration of quantity of heat cuts bits blade, make thereby cobaltic tungsten hard alloy bate. At the beginning of 2013, dimension take an examination ofing of Waerte and Ci scatters undergraduate of the technology that overcome abdicate to produce technical institute on the west (IfP) cooperate hand in hand, to using liquid CO2 low temperature treatment undertakes spadework, among them cutting point has cooled – 78.

5 ℃ , ci Wei took an examination of an experiment to use exterior refrigeration to supply entirely, politic to all sorts of refrigeration (MQL, emulsion, CO2 reachs his all sorts of combination) undertook be comparatived each other. Make clear as a result quite, CO2 law has the largest cooling latent capacity, have very clear advantage, when machining lamina of stainless steel turbine, cost is economic be as high as 40% . Carry basic research of this kind of development and with Switzerland Sidalage is mechanical engineering company clasp, the company of cutting tool major that Waerte takes the lead in becoming a whole world to use microtherm refrigeration principle, for the industry all sorts of application offerred practical solution. In March 2013, this kind of technology gains a success first, name for " Cryo.

Tec " . Special milling cutter is right cutting tool, cooperative both sides chose milling cutter of profile modeling of F2334R round razor blade, this kind of milling cutter undertook technically optimizing for blade treatment. Its are main the characteristic is treatment stability is tall, can use 5 axes treatment. This kind of cutting tool enclothed the 70%~80% of whole treatment craft, thereby purify of great majority metal happens in turbine lamina place. Use 5 axes treatment, the chamfer that can optimize all sorts of positions than mixing cutting force is compared, although be during rough machining, also can be close to outline of wanted final external form. F2334R leaves have two chamfer, can supply the cooling fluid of two kinds of different types at the same time: A chamfer supplies CO2, another chamfer supplies MQL, compress air or emulsion. CO2 has shed cutting tool with liquid state form, its pressure is 60bar, direct gush is in of cutting blade around. Next, dry ice is formed after CO2 herein expands, achieve wanted cooling result. "Cryo.

The measure of important research and development of Tec is to use two slot system, supply to cutting tool inside cooling fluid, is not outside receive cooling fluid to supply a system. " Thomas Schaarschmidt of controller of turbine lamina processing technique says Waerte, "Use 5 axes treatment, ideal result can be achieved anything but for CO2 outside, near area of high temperature cutting impossibly as far as possible namely. When machining titanium alloy, besides pure refrigeration, still need to lubricate. In the method that introduces in article place, use MQL of depart of double chamfer cutting tool and CO2. Sidalage is in charge of research and development special core axis, and Waerte is in charge of offerring optimize cutting tool. The advantage of microtherm refrigeration concept is as follows: Cutting tool wear extent is small, service life is longer; Cutting parameter is optimized, manufacturing efficiency is taller; Better, attrib border area affects exterior quality smaller, spare parts quality is higher; Cut bits 100% can reclaim use, need not prepare to safeguard deal with lubricant or spare parts cleaner. High-pressured Cryo.

Advantage of a of Tec cooling system main technique is, can maintain in machine tool and cutting tool as far as possible long CO2 pressure. Because want pressure to drop only, begin to form ice and jam CO2 supplies access. But, to achieve established and cooling result, CO2 sendout shoulds not be too big, because be compared with emulsion photograph, CO2 cooling fluid is relatively costly, its cost is about 0.

30~0.

50 euro every kilogram. "When affirmatory nozzle diameter, we invested many manpower material resources and time in job of research and development. " Schaarschmidt says, "At present we are trying hard to begin to be optimized further pressure adjusts and supply, near cutting area what make as far as possible. We still issue great strength and lubricant manufactory to give full cooperation develop new-style MQL oil to taste. Heretofore, they can have been used at high temperature application, because this needs couple,CO2 refrigeration is used. At present Cryo.

Tec cutting tool is not mark cutting tool only, because of Sidalage's corresponding machine tool / main shaft technology is immature still. But, waerte is thinking method establishs standard of join of a kind of cutting tool. Cool performance uses martensite stainless steel the test that the turbine lamina with qualitative material has (80mm of × of 80mm of × of 475mm of dimension of much axis Che Xi, original part, fixture) make clear, if use CO2 refrigeration, the temperature that cutting blade is in can reduce 100 ℃ , machine photograph comparing with dry type, life of cutting tool point is lengthened 30% , and cutting parameter still can keep consistent. In the meantime, manufacturing cost is economic 15% . When processing austenite stainless steel, compare with MQL photograph, cutting tool service life is lengthened greatly, manufacturing cost is economic be as high as 30% . Overall for, microtherm machines pair of high temperature alloy (HRSA) have tremendous latent capacity with stainless steel. Now is to need to use the material of ISO S group and ISO M group and application to undertake farther test and verify to this technology. Key of research and development will consider to be used at treatment of part of car line of business and equipment technology, extraction to mix henceforth deal with the problem that waits for a respect to was not solved. The machine tool henceforth may design cutting technology of future to have refrigeration and blame refrigeration function at the same time (no matter whether use cooling fluid) . Exclusive distinction is material of chosen cutting cutting tool: One kind is used at cooling treatment, another kind is used at doing type treatment. Research and development still will have another themes henceforth. During milling, pass clench the teeth and depart, make uses cutting tool tooth heats to cool next. Use microtherm CO2 refrigeration to just can achieve this kind of result adequately only. Because high temperature is handed in,change effect, hard alloy matrix and coating expand with different rate, make coating craze, make finally invalidation of material of cutting cutting tool. The high temperature that a few years the material of all cutting cutting tool of research and development used at doing type to machine in the past works, but need of present material of cutting cutting tool suits microtherm CO2 refrigeration technically, can bear temperature great change. Accordingly, in Waerte the research and development henceforth works in, thomas Schaarschmidt needs to study two a lecture given to a large number of students inscribe: "We are main henceforth the task is pair of cutting tool concepts and standardization of material of professional cutting cutting tool, because we plan to cut turbine hard the proportion of material to increase before 2020,arrive 40% the left and right sides, the market growth potential of this respect is so tremendous, need increases strength of research and development. Article origin: Shanteweikekeleman CNC Milling